avfaudio

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 Go to latest Published: Mar 30, 2026 License: MIT Imports: 12 Imported by: 0

Documentation

Overview

Package avfaudio provides Go bindings for the AVFAudio framework.

Play, record, and process audio; configure your app’s system audio behavior.

Essentials

  • AVFAudio updates: Learn about important changes to AVFAudio.

System audio

  • Handling audio interruptions: Observe audio session notifications to ensure that your app responds appropriately to interruptions.
  • Responding to audio route changes: Observe audio session notifications to ensure that your app responds appropriately to route changes.
  • Routing audio to specific devices in multidevice sessions: Map audio channels to specific devices in multiroute sessions for recording and playback.
  • Adding synthesized speech to calls: Provide a more accessible experience by adding your app’s audio to a call.
  • Capturing stereo audio from built-In microphones: Configure an iOS device’s built-in microphones to add stereo recording capabilities to your app.
  • AVAudioSession: An object that communicates to the system how you intend to use audio in your app. (AVAudioSessionSpatialExperience, AVAudioSessionActivationOptions)
  • AVAudioApplication: An object that manages one or more audio sessions that belong to an app.
  • AVAudioRoutingArbiter: An object for configuring macOS apps to participate in AirPods Automatic Switching.

Basic playback and recording

Advanced audio processing

Speech synthesis

Macros

  • Macros

Key Types

  • AVAudioPlayerNode - An object for scheduling the playback of buffers or segments of audio files.
  • AVAudioEngine - An object that manages a graph of audio nodes, controls playback, and configures real-time rendering constraints.
  • AVAudioEnvironmentNode - An object that simulates a 3D audio environment.
  • AVAudioUnitMIDIInstrument - An object that represents music devices or remote instruments.
  • AVAudioPlayer - An object that plays audio data from a file or buffer.
  • AVAudioUnitComponent - An object that provides details about an audio unit.
  • AVAudioUnitSampler - An object that you configure with one or more instrument samples, based on Apple’s Sampler audio unit.
  • AVAudioInputNode - An object that connects to the system’s audio input.
  • AVAudioConverter - An object that converts streams of audio between formats.
  • AVAudioSequencer - An object that plays audio from a collection of MIDI events the system organizes into music tracks.

Code generated from Apple documentation. DO NOT EDIT.

Index

Constants

This section is empty.

Variables

View Source 
var (
	// AVAudioApplicationInputMuteStateChangeNotification is a notification the system posts when the app’s audio input mute state changes.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication/inputMuteStateChangeNotification
	AVAudioApplicationInputMuteStateChangeNotification foundation.NSNotificationName
	// AVAudioUnitComponentManagerRegistrationsChangedNotification is a notification the component manager generates when it updates its list of components.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponentManager/registrationsChangedNotification
	AVAudioUnitComponentManagerRegistrationsChangedNotification foundation.NSNotificationName
	// AVSpeechSynthesisAvailableVoicesDidChangeNotification is a notification that indicates a change in available voices for speech synthesis.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/availableVoicesDidChangeNotification
	AVSpeechSynthesisAvailableVoicesDidChangeNotification foundation.NSNotificationName
)
View Source 
var (
	// AVAudioApplicationMuteStateKey is a user information key to determine the app’s audio mute state.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication/muteStateKey
	AVAudioApplicationMuteStateKey string
	// AVAudioBitRateStrategy_Constant is a value that represents a constant bit rate strategy.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioBitRateStrategy_Constant
	AVAudioBitRateStrategy_Constant string
	// AVAudioBitRateStrategy_LongTermAverage is a value that represents an average bit rate strategy.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioBitRateStrategy_LongTermAverage
	AVAudioBitRateStrategy_LongTermAverage string
	// AVAudioBitRateStrategy_Variable is a value that represents a variable bit rate strategy.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioBitRateStrategy_Variable
	AVAudioBitRateStrategy_Variable string
	// AVAudioBitRateStrategy_VariableConstrained is a value that represents a constrained variable bit rate strategy.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioBitRateStrategy_VariableConstrained
	AVAudioBitRateStrategy_VariableConstrained string
	// AVAudioEngineConfigurationChangeNotification is a notification the framework posts when the audio engine configuration changes.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngineConfigurationChangeNotification
	AVAudioEngineConfigurationChangeNotification string
	// AVAudioFileTypeKey is a string that indicates the audio file type.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioFileTypeKey
	AVAudioFileTypeKey string
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mutestatekey
	AVAudioSessionMuteStateKey foundation.NSString
	// AVAudioUnitComponentTagsDidChangeNotification is a notification that indicates when component tags change.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponentTagsDidChangeNotification
	AVAudioUnitComponentTagsDidChangeNotification string
	// AVAudioUnitManufacturerNameApple is the audio unit manufacturer is Apple.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitManufacturerNameApple
	AVAudioUnitManufacturerNameApple string
	// AVAudioUnitTypeEffect is an audio unit type that represents an effect.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTypeEffect
	AVAudioUnitTypeEffect string
	// AVAudioUnitTypeFormatConverter is an audio unit type that represents a format converter.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTypeFormatConverter
	AVAudioUnitTypeFormatConverter string
	// AVAudioUnitTypeGenerator is an audio unit type that represents a generator.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTypeGenerator
	AVAudioUnitTypeGenerator string
	// AVAudioUnitTypeMIDIProcessor is an audio unit type that represents a MIDI processor.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTypeMIDIProcessor
	AVAudioUnitTypeMIDIProcessor string
	// AVAudioUnitTypeMixer is an audio unit type that represents a mixer.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTypeMixer
	AVAudioUnitTypeMixer string
	// AVAudioUnitTypeMusicDevice is an audio unit type that represents a music device.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTypeMusicDevice
	AVAudioUnitTypeMusicDevice string
	// AVAudioUnitTypeMusicEffect is an audio unit type that represents a music effect.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTypeMusicEffect
	AVAudioUnitTypeMusicEffect string
	// AVAudioUnitTypeOfflineEffect is an audio unit type that represents an offline effect.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTypeOfflineEffect
	AVAudioUnitTypeOfflineEffect string
	// AVAudioUnitTypeOutput is an audio unit type that represents an output.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTypeOutput
	AVAudioUnitTypeOutput string
	// AVAudioUnitTypePanner is an audio unit type that represents a panner.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTypePanner
	AVAudioUnitTypePanner string
	// See: https://developer.apple.com/documentation/AVFAudio/AVChannelLayoutKey
	AVChannelLayoutKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVEncoderASPFrequencyKey
	AVEncoderASPFrequencyKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVEncoderAudioQualityForVBRKey
	AVEncoderAudioQualityForVBRKey string
	// AVEncoderAudioQualityKey is a constant that represents an integer from the audio quality enumeration.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVEncoderAudioQualityKey
	AVEncoderAudioQualityKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVEncoderBitDepthHintKey
	AVEncoderBitDepthHintKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVEncoderBitRateKey
	AVEncoderBitRateKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVEncoderBitRatePerChannelKey
	AVEncoderBitRatePerChannelKey string
	// AVEncoderBitRateStrategyKey is a constant that represents the bit rate strategy for the encoder to use.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVEncoderBitRateStrategyKey
	AVEncoderBitRateStrategyKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVEncoderContentSourceKey
	AVEncoderContentSourceKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVEncoderDynamicRangeControlConfigurationKey
	AVEncoderDynamicRangeControlConfigurationKey string
	// AVFormatIDKey is an integer value that represents the format of the audio data.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVFormatIDKey
	AVFormatIDKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVLinearPCMBitDepthKey
	AVLinearPCMBitDepthKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVLinearPCMIsBigEndianKey
	AVLinearPCMIsBigEndianKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVLinearPCMIsFloatKey
	AVLinearPCMIsFloatKey string
	// See: https://developer.apple.com/documentation/AVFAudio/AVLinearPCMIsNonInterleaved
	AVLinearPCMIsNonInterleaved string
	// AVNumberOfChannelsKey is an integer value that represents the number of channels.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVNumberOfChannelsKey
	AVNumberOfChannelsKey string
	// AVSampleRateConverterAlgorithmKey is a string value that represents the sample rate converter algorithm to use.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSampleRateConverterAlgorithmKey
	AVSampleRateConverterAlgorithmKey string
	// AVSampleRateConverterAlgorithm_Mastering is the mastering encoder bit rate strategy.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSampleRateConverterAlgorithm_Mastering
	AVSampleRateConverterAlgorithm_Mastering string
	// AVSampleRateConverterAlgorithm_MinimumPhase is the minimum phase encoder bit rate strategy.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSampleRateConverterAlgorithm_MinimumPhase
	AVSampleRateConverterAlgorithm_MinimumPhase string
	// AVSampleRateConverterAlgorithm_Normal is the usual encoder bit rate strategy.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSampleRateConverterAlgorithm_Normal
	AVSampleRateConverterAlgorithm_Normal string
	// AVSampleRateConverterAudioQualityKey is an integer value that represents the audio quality for conversion.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSampleRateConverterAudioQualityKey
	AVSampleRateConverterAudioQualityKey string
	// AVSampleRateKey is a floating point value that represents the sample rate, in hertz.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSampleRateKey
	AVSampleRateKey string
	// AVSpeechSynthesisIPANotationAttribute is a string that contains International Phonetic Alphabet (IPA) symbols the speech synthesizer uses to control pronunciation of certain words or phrases.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisIPANotationAttribute
	AVSpeechSynthesisIPANotationAttribute string
	// AVSpeechSynthesisVoiceIdentifierAlex is the voice that the system identifies as Alex.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoiceIdentifierAlex
	AVSpeechSynthesisVoiceIdentifierAlex string
)
View Source 
var (
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/availableinputschangenotification
	AVAudioSessionAvailableInputsChangeNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/interruptionnotification
	AVAudioSessionInterruptionNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mediaserviceswerelostnotification
	AVAudioSessionMediaServicesWereLostNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mediaserviceswereresetnotification
	AVAudioSessionMediaServicesWereResetNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/microphoneinjectioncapabilitieschangenotification
	AVAudioSessionMicrophoneInjectionCapabilitiesChangeNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/outputmutestatechangenotification
	AVAudioSessionOutputMuteStateChangeNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/renderingcapabilitieschangenotification
	AVAudioSessionRenderingCapabilitiesChangeNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/renderingmodechangenotification
	AVAudioSessionRenderingModeChangeNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/routechangenotification
	AVAudioSessionRouteChangeNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/silencesecondaryaudiohintnotification
	AVAudioSessionSilenceSecondaryAudioHintNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/spatialplaybackcapabilitieschangednotification
	AVAudioSessionSpatialPlaybackCapabilitiesChangedNotification foundation.NSNotification
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/userintenttounmuteoutputnotification
	AVAudioSessionUserIntentToUnmuteOutputNotification foundation.NSNotification
)
View Source 
var (
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/category-swift.struct/ambient
	AVAudioSessionCategoryAmbient objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/category-swift.struct/audioprocessing
	AVAudioSessionCategoryAudioProcessing objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/category-swift.struct/multiroute
	AVAudioSessionCategoryMultiRoute objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/category-swift.struct/playandrecord
	AVAudioSessionCategoryPlayAndRecord objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/category-swift.struct/playback
	AVAudioSessionCategoryPlayback objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/category-swift.struct/record
	AVAudioSessionCategoryRecord objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/category-swift.struct/soloambient
	AVAudioSessionCategorySoloAmbient objc.ID
	// AVAudioSessionLocationLower is a value that indicates that the data source is located near the bottom end of the device.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/Location/lower
	AVAudioSessionLocationLower objc.ID
	// AVAudioSessionLocationUpper is a value that indicates that the data source is located near the top end of the device.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/Location/upper
	AVAudioSessionLocationUpper objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/default
	AVAudioSessionModeDefault objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/dualroute
	AVAudioSessionModeDualRoute objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/gamechat
	AVAudioSessionModeGameChat objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/measurement
	AVAudioSessionModeMeasurement objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/movieplayback
	AVAudioSessionModeMoviePlayback objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/shortformvideo
	AVAudioSessionModeShortFormVideo objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/spokenaudio
	AVAudioSessionModeSpokenAudio objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/videochat
	AVAudioSessionModeVideoChat objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/videorecording
	AVAudioSessionModeVideoRecording objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/voicechat
	AVAudioSessionModeVoiceChat objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/mode-swift.struct/voiceprompt
	AVAudioSessionModeVoicePrompt objc.ID
	// AVAudioSessionOrientationBack is a data source that points outward from the back of the device, away from the user.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/Orientation/back
	AVAudioSessionOrientationBack objc.ID
	// AVAudioSessionOrientationBottom is a data source that points downward.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/Orientation/bottom
	AVAudioSessionOrientationBottom objc.ID
	// AVAudioSessionOrientationFront is a data source that points outward from the front of the device, toward the user.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/Orientation/front
	AVAudioSessionOrientationFront objc.ID
	// AVAudioSessionOrientationLeft is a data source that points outward to the left of the device, away from the user.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/Orientation/left
	AVAudioSessionOrientationLeft objc.ID
	// AVAudioSessionOrientationRight is a data source that points outward to the right of the device, away from the user.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/Orientation/right
	AVAudioSessionOrientationRight objc.ID
	// AVAudioSessionOrientationTop is a data source that points upward.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/Orientation/top
	AVAudioSessionOrientationTop objc.ID
	// AVAudioSessionPolarPatternCardioid is a data source that’s most sensitive to sound from the direction of the data source and is nearly insensitive to sound from the opposite direction.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/PolarPattern/cardioid
	AVAudioSessionPolarPatternCardioid objc.ID
	// AVAudioSessionPolarPatternOmnidirectional is a data source that’s equally sensitive to sound from any direction.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/PolarPattern/omnidirectional
	AVAudioSessionPolarPatternOmnidirectional objc.ID
	// See: https://developer.apple.com/documentation/avfaudio/avaudiosession/polarpattern/stereo
	AVAudioSessionPolarPatternStereo objc.ID
	// AVAudioSessionPolarPatternSubcardioid is a data source that’s most sensitive to sound from the direction of the data source and is less sensitive to sound from the opposite direction.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/PolarPattern/subcardioid
	AVAudioSessionPolarPatternSubcardioid objc.ID
)
View Source 
var (
	// AVSpeechUtteranceDefaultSpeechRate is the default rate the speech synthesizer uses when speaking an utterance.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtteranceDefaultSpeechRate
	AVSpeechUtteranceDefaultSpeechRate float32
	// AVSpeechUtteranceMaximumSpeechRate is the maximum rate the speech synthesizer uses when speaking an utterance.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtteranceMaximumSpeechRate
	AVSpeechUtteranceMaximumSpeechRate float32
	// AVSpeechUtteranceMinimumSpeechRate is the minimum rate the speech synthesizer uses when speaking an utterance.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtteranceMinimumSpeechRate
	AVSpeechUtteranceMinimumSpeechRate float32
)
View Source 
var AVAudioSequencerInfoDictionaryKeys struct {
	// Album: A key that represents the album.
	Album AVAudioSequencerInfoDictionaryKey
	// ApproximateDurationInSeconds: A key that represents the approximate duration.
	ApproximateDurationInSeconds AVAudioSequencerInfoDictionaryKey
	// Artist: A key that represents the artist.
	Artist AVAudioSequencerInfoDictionaryKey
	// ChannelLayout: A key that represents the channel layout.
	ChannelLayout AVAudioSequencerInfoDictionaryKey
	// Comments: A key that represents the comments.
	Comments AVAudioSequencerInfoDictionaryKey
	// Composer: A key that represents the composer.
	Composer AVAudioSequencerInfoDictionaryKey
	// Copyright: A key that represents the copyright statement.
	Copyright AVAudioSequencerInfoDictionaryKey
	// EncodingApplication: A key that represents the encoding application.
	EncodingApplication AVAudioSequencerInfoDictionaryKey
	// Genre: A key that represents the genre.
	Genre AVAudioSequencerInfoDictionaryKey
	// ISRC: A key that represents the international standard recording code.
	ISRC AVAudioSequencerInfoDictionaryKey
	// KeySignature: A key that represents the key signature.
	KeySignature AVAudioSequencerInfoDictionaryKey
	// Lyricist: A key that represents the lyricist.
	Lyricist AVAudioSequencerInfoDictionaryKey
	// NominalBitRate: A key that represents the nominal bit rate.
	NominalBitRate AVAudioSequencerInfoDictionaryKey
	// RecordedDate: A key that represents the date of the recording.
	RecordedDate AVAudioSequencerInfoDictionaryKey
	// SourceBitDepth: A key that represents the bit depth of the source.
	SourceBitDepth AVAudioSequencerInfoDictionaryKey
	// SourceEncoder: A key that represents the encoder the source uses.
	SourceEncoder AVAudioSequencerInfoDictionaryKey
	// SubTitle: A key that represents the subtitle.
	SubTitle AVAudioSequencerInfoDictionaryKey
	// Tempo: A key that represents the tempo.
	Tempo AVAudioSequencerInfoDictionaryKey
	// TimeSignature: A key that represents the time signature.
	TimeSignature AVAudioSequencerInfoDictionaryKey
	// Title: A key that represents the title.
	Title AVAudioSequencerInfoDictionaryKey
	// TrackNumber: A key that represents the track number.
	TrackNumber AVAudioSequencerInfoDictionaryKey
	// Year: A key that represents the year.
	Year AVAudioSequencerInfoDictionaryKey
}

AVAudioSequencerInfoDictionaryKeys provides typed accessors for AVAudioSequencerInfoDictionaryKey constants.

View Source 
var (
	// AVExtendedNoteOnEventDefaultInstrument is a constant that represents the default instrument identifier.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent/defaultInstrument
	AVExtendedNoteOnEventDefaultInstrument uint32
)

Functions

func NewAVAudioApplicationMicrophoneInjectionPermissionBlock 

func NewAVAudioApplicationMicrophoneInjectionPermissionBlock(handler AVAudioApplicationMicrophoneInjectionPermissionHandler) (objc.ID, func())

NewAVAudioApplicationMicrophoneInjectionPermissionBlock wraps a Go AVAudioApplicationMicrophoneInjectionPermissionHandler as an Objective-C block. The caller must defer the returned cleanup function.

Used by:

  • [AVAudioApplication.RequestMicrophoneInjectionPermissionWithCompletionHandler]

func NewAVAudioUnitComponentBlock 

func NewAVAudioUnitComponentBlock(handler AVAudioUnitComponentHandler) (objc.ID, func())

NewAVAudioUnitComponentBlock wraps a Go AVAudioUnitComponentHandler as an Objective-C block. The caller must defer the returned cleanup function.

Used by:

func NewAVAudioUnitErrorBlock 

func NewAVAudioUnitErrorBlock(handler AVAudioUnitErrorHandler) (objc.ID, func())

NewAVAudioUnitErrorBlock wraps a Go AVAudioUnitErrorHandler as an Objective-C block. The caller must defer the returned cleanup function.

Used by:

  • [AVAudioUnit.InstantiateWithComponentDescriptionOptionsCompletionHandler]

func NewAVAudioVoiceProcessingSpeechActivityEventBlock 

func NewAVAudioVoiceProcessingSpeechActivityEventBlock(handler AVAudioVoiceProcessingSpeechActivityEventHandler) (objc.ID, func())

NewAVAudioVoiceProcessingSpeechActivityEventBlock wraps a Go AVAudioVoiceProcessingSpeechActivityEventHandler as an Objective-C block. The caller must defer the returned cleanup function.

Used by:

func NewAVSpeechSynthesisPersonalVoiceAuthorizationStatusBlock 

func NewAVSpeechSynthesisPersonalVoiceAuthorizationStatusBlock(handler AVSpeechSynthesisPersonalVoiceAuthorizationStatusHandler) (objc.ID, func())

NewAVSpeechSynthesisPersonalVoiceAuthorizationStatusBlock wraps a Go AVSpeechSynthesisPersonalVoiceAuthorizationStatusHandler as an Objective-C block. The caller must defer the returned cleanup function.

Used by:

  • [AVSpeechSynthesizer.RequestPersonalVoiceAuthorizationWithCompletionHandler]

func NewBoolBlock 

func NewBoolBlock(handler BoolHandler) (objc.ID, func())

NewBoolBlock wraps a Go BoolHandler as an Objective-C block. The caller must defer the returned cleanup function.

Used by:

func NewBoolErrorBlock 

func NewBoolErrorBlock(handler BoolErrorHandler) (objc.ID, func())

NewBoolErrorBlock wraps a Go BoolErrorHandler as an Objective-C block. The caller must defer the returned cleanup function.

Used by:

func NewErrorBlock 

func NewErrorBlock(handler ErrorHandler) (objc.ID, func())

NewErrorBlock wraps a Go ErrorHandler as an Objective-C block. The caller must defer the returned cleanup function.

Used by:

func NewconstAudioBufferListBlock 

func NewconstAudioBufferListBlock(handler constAudioBufferListHandler) (objc.ID, func())

NewconstAudioBufferListBlock wraps a Go [constAudioBufferListHandler] as an Objective-C block. The caller must defer the returned cleanup function.

Used by:

Types

type AVAUPresetEvent 

type AVAUPresetEvent struct {
	AVMusicEvent
}

An object that represents a preset load and change on the music track’s destination audio unit.

Creating a Preset Event

Configuring a Preset Event

See: https://developer.apple.com/documentation/AVFAudio/AVAUPresetEvent

func AVAUPresetEventFromID 

func AVAUPresetEventFromID(id objc.ID) AVAUPresetEvent

AVAUPresetEventFromID constructs a AVAUPresetEvent from an objc.ID.

An object that represents a preset load and change on the music track’s destination audio unit.

func NewAUPresetEventWithScopeElementDictionary 

func NewAUPresetEventWithScopeElementDictionary(scope uint32, element uint32, presetDictionary foundation.INSDictionary) AVAUPresetEvent

Creates an event with the scope, element, and dictionary for the preset.

scope: The audio unit scope.

element: The element index in the scope.

presetDictionary: The dictionary that contains the preset.

Discussion

The system copies the dictionary you specify and isn’t editable once it creates the event. The `scope` parameter must be kAudioUnitScope_Global, and the element index should be `0`.

See: https://developer.apple.com/documentation/AVFAudio/AVAUPresetEvent/init(scope:element:dictionary:)

func NewAVAUPresetEvent 

func NewAVAUPresetEvent() AVAUPresetEvent

NewAVAUPresetEvent creates a new AVAUPresetEvent instance.

func (AVAUPresetEvent) Autorelease 

func (a AVAUPresetEvent) Autorelease() AVAUPresetEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVAUPresetEvent) Element 

func (a AVAUPresetEvent) Element() uint32

The element index in the scope.

See: https://developer.apple.com/documentation/AVFAudio/AVAUPresetEvent/element

func (AVAUPresetEvent) Init 

func (a AVAUPresetEvent) Init() AVAUPresetEvent

Init initializes the instance.

func (AVAUPresetEvent) InitWithScopeElementDictionary 

func (a AVAUPresetEvent) InitWithScopeElementDictionary(scope uint32, element uint32, presetDictionary foundation.INSDictionary) AVAUPresetEvent

Creates an event with the scope, element, and dictionary for the preset.

scope: The audio unit scope.

element: The element index in the scope.

presetDictionary: The dictionary that contains the preset.

Discussion

The system copies the dictionary you specify and isn’t editable once it creates the event. The `scope` parameter must be kAudioUnitScope_Global, and the element index should be `0`.

See: https://developer.apple.com/documentation/AVFAudio/AVAUPresetEvent/init(scope:element:dictionary:)

func (AVAUPresetEvent) PresetDictionary 

func (a AVAUPresetEvent) PresetDictionary() foundation.INSDictionary

The dictionary that contains the preset.

See: https://developer.apple.com/documentation/AVFAudio/AVAUPresetEvent/presetDictionary

func (AVAUPresetEvent) Scope 

func (a AVAUPresetEvent) Scope() uint32

The audio unit scope.

See: https://developer.apple.com/documentation/AVFAudio/AVAUPresetEvent/scope

func (AVAUPresetEvent) SetElement 

func (a AVAUPresetEvent) SetElement(value uint32)

func (AVAUPresetEvent) SetScope 

func (a AVAUPresetEvent) SetScope(value uint32)

type AVAUPresetEventClass 

type AVAUPresetEventClass struct {
	// contains filtered or unexported fields
}

func GetAVAUPresetEventClass 

func GetAVAUPresetEventClass() AVAUPresetEventClass

GetAVAUPresetEventClass returns the class object for AVAUPresetEvent.

func (AVAUPresetEventClass) Alloc 

func (ac AVAUPresetEventClass) Alloc() AVAUPresetEvent

Alloc allocates memory for a new instance of the class.

func (AVAUPresetEventClass) Class 

func (ac AVAUPresetEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudio3DAngularOrientation 

type AVAudio3DAngularOrientation struct {
	Yaw   float32 // The side-to-side movement of the listener’s head.
	Pitch float32 // The up-and-down movement of the listener’s head.
	Roll  float32 // The tilt of the listener’s head.

}

AVAudio3DAngularOrientation - A structure that represents the angular orientation of the listener in 3D space.

[Full Topic] [Full Topic]: https://developer.apple.com/documentation/AVFAudio/AVAudio3DAngularOrientation

type AVAudio3DMixing 

type AVAudio3DMixing interface {
	objectivec.IObject

	// A value that simulates filtering of the direct path of sound due to an obstacle.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction
	Obstruction() float32

	// A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion
	Occlusion() float32

	// The location of the source in the 3D environment.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position
	Position() AVAudio3DPoint

	// A value that changes the playback rate of the input signal.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate
	Rate() float32

	// The in-head mode for a point source.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode
	PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

	// A value that controls the blend of dry and reverb processed audio.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend
	ReverbBlend() float32

	// The source mode for the input bus of the audio environment node.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode
	SourceMode() AVAudio3DMixingSourceMode

	// The type of rendering algorithm the mixer uses.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm
	RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

	// A value that simulates filtering of the direct path of sound due to an obstacle.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction
	SetObstruction(value float32)

	// A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion
	SetOcclusion(value float32)

	// The location of the source in the 3D environment.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position
	SetPosition(value AVAudio3DPoint)

	// A value that changes the playback rate of the input signal.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate
	SetRate(value float32)

	// The in-head mode for a point source.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode
	SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

	// A value that controls the blend of dry and reverb processed audio.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend
	SetReverbBlend(value float32)

	// The source mode for the input bus of the audio environment node.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode
	SetSourceMode(value AVAudio3DMixingSourceMode)

	// The type of rendering algorithm the mixer uses.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm
	SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)
}

A collection of properties that define 3D mixing properties.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing

type AVAudio3DMixingObject 

type AVAudio3DMixingObject struct {
	objectivec.Object
}

AVAudio3DMixingObject wraps an existing Objective-C object that conforms to the AVAudio3DMixing protocol.

func AVAudio3DMixingObjectFromID 

func AVAudio3DMixingObjectFromID(id objc.ID) AVAudio3DMixingObject

AVAudio3DMixingObjectFromID constructs a AVAudio3DMixingObject from an objc.ID. The object is determined to conform to the protocol at runtime.

func (AVAudio3DMixingObject) BaseObject 

func (o AVAudio3DMixingObject) BaseObject() objectivec.Object

func (AVAudio3DMixingObject) Obstruction 

func (o AVAudio3DMixingObject) Obstruction() float32

A value that simulates filtering of the direct path of sound due to an obstacle.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudio3DMixingObject) Occlusion 

func (o AVAudio3DMixingObject) Occlusion() float32

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudio3DMixingObject) PointSourceInHeadMode 

func (o AVAudio3DMixingObject) PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudio3DMixingObject) Position 

func (o AVAudio3DMixingObject) Position() AVAudio3DPoint

The location of the source in the 3D environment.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudio3DMixingObject) Rate 

func (o AVAudio3DMixingObject) Rate() float32

A value that changes the playback rate of the input signal.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudio3DMixingObject) RenderingAlgorithm 

func (o AVAudio3DMixingObject) RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

The type of rendering algorithm the mixer uses.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudio3DMixingObject) ReverbBlend 

func (o AVAudio3DMixingObject) ReverbBlend() float32

A value that controls the blend of dry and reverb processed audio.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudio3DMixingObject) SetObstruction 

func (o AVAudio3DMixingObject) SetObstruction(value float32)

A value that simulates filtering of the direct path of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks only the direct path of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudio3DMixingObject) SetOcclusion 

func (o AVAudio3DMixingObject) SetOcclusion(value float32)

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks the direct and reverb paths of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudio3DMixingObject) SetPointSourceInHeadMode 

func (o AVAudio3DMixingObject) SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudio3DMixingObject) SetPosition 

func (o AVAudio3DMixingObject) SetPosition(value AVAudio3DPoint)

The location of the source in the 3D environment.

Discussion

The system specifies the coordinates in meters. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudio3DMixingObject) SetRate 

func (o AVAudio3DMixingObject) SetRate(value float32)

A value that changes the playback rate of the input signal.

Discussion

A value of `2.0` results in the output audio playing one octave higher. A value of `0.5` results in the output audio playing one octave lower.

The default value is `1.0`, and the range of valid values is `0.5` to `2.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudio3DMixingObject) SetRenderingAlgorithm 

func (o AVAudio3DMixingObject) SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)

The type of rendering algorithm the mixer uses.

Discussion

Depending on the current output format of the AVAudioEnvironmentNode instance, the system may only support a subset of the rendering algorithms. You can retrieve an array of valid rendering algorithms by calling the [ApplicableRenderingAlgorithms] function of the AVAudioEnvironmentNode instance.

The default rendering algorithm is AVAudio3DMixingRenderingAlgorithmEqualPowerPanning. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudio3DMixingObject) SetReverbBlend 

func (o AVAudio3DMixingObject) SetReverbBlend(value float32)

A value that controls the blend of dry and reverb processed audio.

Discussion

This property controls the amount of the source’s audio that the AVAudioEnvironmentNode instance processes. A value of `0.5` results in an equal blend of dry and processed (wet) audio.

The default is `0.0`, and the range of valid values is `0.0` (completely dry) to `1.0` (completely wet). Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudio3DMixingObject) SetSourceMode 

func (o AVAudio3DMixingObject) SetSourceMode(value AVAudio3DMixingSourceMode)

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudio3DMixingObject) SourceMode 

func (o AVAudio3DMixingObject) SourceMode() AVAudio3DMixingSourceMode

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

type AVAudio3DMixingPointSourceInHeadMode 

type AVAudio3DMixingPointSourceInHeadMode int

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixingPointSourceInHeadMode 

const (
	// AVAudio3DMixingPointSourceInHeadModeBypass: The point source distributes into each output channel inside the head of the listener.
	AVAudio3DMixingPointSourceInHeadModeBypass AVAudio3DMixingPointSourceInHeadMode = 1
	// AVAudio3DMixingPointSourceInHeadModeMono: The point source remains a single mono source inside the head of the listener regardless of the channels it consists of.
	AVAudio3DMixingPointSourceInHeadModeMono AVAudio3DMixingPointSourceInHeadMode = 0
)

func (AVAudio3DMixingPointSourceInHeadMode) String 

func (e AVAudio3DMixingPointSourceInHeadMode) String() string

type AVAudio3DMixingRenderingAlgorithm 

type AVAudio3DMixingRenderingAlgorithm int

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixingRenderingAlgorithm 

const (
	// AVAudio3DMixingRenderingAlgorithmAuto: Automatically selects the highest-quality rendering algorithm available for the current playback hardware.
	AVAudio3DMixingRenderingAlgorithmAuto AVAudio3DMixingRenderingAlgorithm = 7
	// AVAudio3DMixingRenderingAlgorithmEqualPowerPanning: An algorithm that pans the data of the mixer bus into a stereo field.
	AVAudio3DMixingRenderingAlgorithmEqualPowerPanning AVAudio3DMixingRenderingAlgorithm = 0
	// AVAudio3DMixingRenderingAlgorithmHRTF: A high-quality algorithm that uses filtering to emulate 3D space in headphones.
	AVAudio3DMixingRenderingAlgorithmHRTF AVAudio3DMixingRenderingAlgorithm = 2
	// AVAudio3DMixingRenderingAlgorithmHRTFHQ: A higher-quality head-related transfer function rendering algorithm.
	AVAudio3DMixingRenderingAlgorithmHRTFHQ AVAudio3DMixingRenderingAlgorithm = 6
	// AVAudio3DMixingRenderingAlgorithmSoundField: An algorithm that renders to multichannel hardware.
	AVAudio3DMixingRenderingAlgorithmSoundField AVAudio3DMixingRenderingAlgorithm = 3
	// AVAudio3DMixingRenderingAlgorithmSphericalHead: An algorithm that emulates 3D space in headphones by simulating interaural time delays and other spatial cues.
	AVAudio3DMixingRenderingAlgorithmSphericalHead AVAudio3DMixingRenderingAlgorithm = 1
	// AVAudio3DMixingRenderingAlgorithmStereoPassThrough: An algorithm to use when the source data doesn’t need localization.
	AVAudio3DMixingRenderingAlgorithmStereoPassThrough AVAudio3DMixingRenderingAlgorithm = 5
)

func (AVAudio3DMixingRenderingAlgorithm) String 

func (e AVAudio3DMixingRenderingAlgorithm) String() string

type AVAudio3DMixingSourceMode 

type AVAudio3DMixingSourceMode int

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixingSourceMode 

const (
	// AVAudio3DMixingSourceModeAmbienceBed: The input channels spread around the listener as far-field sources that anchor to global space.
	AVAudio3DMixingSourceModeAmbienceBed AVAudio3DMixingSourceMode = 3
	// AVAudio3DMixingSourceModeBypass: A mode that does no spatial rendering.
	AVAudio3DMixingSourceModeBypass AVAudio3DMixingSourceMode = 1
	// AVAudio3DMixingSourceModePointSource: All channels of the bus render as a single source at the location of the source node.
	AVAudio3DMixingSourceModePointSource AVAudio3DMixingSourceMode = 2
	// AVAudio3DMixingSourceModeSpatializeIfMono: A mono input bus that renders as a point source at the location of the source node.
	AVAudio3DMixingSourceModeSpatializeIfMono AVAudio3DMixingSourceMode = 0
)

func (AVAudio3DMixingSourceMode) String 

func (e AVAudio3DMixingSourceMode) String() string

type AVAudio3DPoint 

type AVAudio3DPoint struct {
	X float32 // The location on the x-axis, in meters.
	Y float32 // The location on the y-axis, in meters.
	Z float32 // The location on the z-axis, in meters.

}

AVAudio3DPoint - A structure that represents a point in 3D space.

[Full Topic] [Full Topic]: https://developer.apple.com/documentation/AVFAudio/AVAudio3DPoint

type AVAudio3DVector 

type AVAudio3DVector = AVAudio3DPoint

AVAudio3DVector is a structure that represents a vector in 3D space, in degrees.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DVector

type AVAudio3DVectorOrientation 

type AVAudio3DVectorOrientation struct {
	Forward AVAudio3DVector // The forward vector points in the direction that the listener faces.
	Up      AVAudio3DVector // The up vector is orthogonal to the forward vector and points upward from the listener’s head.

}

AVAudio3DVectorOrientation - A structure that represents two orthogonal vectors that describe the orientation of the listener in 3D space.

[Full Topic] [Full Topic]: https://developer.apple.com/documentation/AVFAudio/AVAudio3DVectorOrientation

type AVAudioApplication 

type AVAudioApplication struct {
	objectivec.Object
}

An object that manages one or more audio sessions that belong to an app.

Overview

Access the shared audio application instance to control app-level audio operations, such as requesting microphone permission and controlling audio input muting.

Requesting audio recording permission

Managing audio input mute state

See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication

func AVAudioApplicationFromID 

func AVAudioApplicationFromID(id objc.ID) AVAudioApplication

AVAudioApplicationFromID constructs a AVAudioApplication from an objc.ID.

An object that manages one or more audio sessions that belong to an app.

func NewAVAudioApplication 

func NewAVAudioApplication() AVAudioApplication

NewAVAudioApplication creates a new AVAudioApplication instance.

func (AVAudioApplication) Autorelease 

func (a AVAudioApplication) Autorelease() AVAudioApplication

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioApplication) Init 

func (a AVAudioApplication) Init() AVAudioApplication

Init initializes the instance.

func (AVAudioApplication) InputMuted 

func (a AVAudioApplication) InputMuted() bool

A Boolean value that indicates whether the app’s audio input is in a muted state.

Discussion

Set a new value for this property by calling the [SetInputMutedError] method.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication/isInputMuted

func (AVAudioApplication) RecordPermission 

func (a AVAudioApplication) RecordPermission() AVAudioApplicationRecordPermission

The app’s permission to record audio.

Discussion

See [RequestRecordPermissionWithCompletionHandler] for more information.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication/recordPermission-swift.property

func (AVAudioApplication) SetInputMuteStateChangeHandlerError 

func (a AVAudioApplication) SetInputMuteStateChangeHandlerError(inputMuteHandler func(bool) bool) (bool, error)

Sets a callback to handle changes to application-level audio muting states.

inputMuteHandler: A callback that the system invokes when the input mute state changes. If the callback receives a true value, mute all input audio samples until the next time the system calls the handler. Return a value of true if you muted input successfully, or in exceptional cases, return false to indicate the mute action fails.

Discussion

Use this method to set a closure to handle your macOS app’s input muting logic. The system calls thie closure when the input mute state changes, either due to setting the [InputMuted] state, or due to a Bluetooth audio accessory gesture (certain AirPods / Beats headphones) changing the mute state.

Since the input mute handling logic should happen a single place, subsequent calls to this method overwrite any previously registered block with the one you provide. You can specify a `nil` to cancel the callback.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication/setInputMuteStateChangeHandler(_:)

func (AVAudioApplication) SetInputMutedError 

func (a AVAudioApplication) SetInputMutedError(muted bool) (bool, error)

Sets a Boolean value that indicates whether the app’s audio input is in a muted state.

muted: A Boolean value that indicates the new mute state.

Discussion

In platforms that use AVAudioSession, setting the value to true mutes all sources of audio input in the app. In macOS, the system instead invokes the callback that you register by calling [SetInputMuteStateChangeHandlerError] to handle input muting.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication/setInputMuted(_:)

type AVAudioApplicationClass 

type AVAudioApplicationClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioApplicationClass 

func GetAVAudioApplicationClass() AVAudioApplicationClass

GetAVAudioApplicationClass returns the class object for AVAudioApplication.

func (AVAudioApplicationClass) Alloc 

func (ac AVAudioApplicationClass) Alloc() AVAudioApplication

Alloc allocates memory for a new instance of the class.

func (AVAudioApplicationClass) Class 

func (ac AVAudioApplicationClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

func (AVAudioApplicationClass) RequestRecordPermission 

func (ac AVAudioApplicationClass) RequestRecordPermission(ctx context.Context) (bool, error)

RequestRecordPermission is a synchronous wrapper around [AVAudioApplication.RequestRecordPermissionWithCompletionHandler]. It blocks until the completion handler fires or the context is cancelled.

func (AVAudioApplicationClass) RequestRecordPermissionWithCompletionHandler 

func (_AVAudioApplicationClass AVAudioApplicationClass) RequestRecordPermissionWithCompletionHandler(response BoolHandler)

Determines whether the app has permission to record audio.

response: A Boolean value that indicates whether the user grants the app permission to record audio.

Discussion

Recording audio requires explicit permission from the user. The first time your app attempts to record audio input, the system automatically prompts the user for permission. You can also explicitly ask for permission by calling this method. This method returns immediately, but the system waits for user input if the user hasn’t previously granted or denied recording permission.

Unless a user grants your app permission to record audio, it captures only silence (zeroed out audio samples).

After a user responds to a recording permission prompt from your app, the system remembers their choice and won’t prompt them again. If a user denies the app recording permission, they can grant it access in the Privacy & Security section of the Settings app.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication/requestRecordPermission(completionHandler:)

func (AVAudioApplicationClass) SharedInstance 

func (_AVAudioApplicationClass AVAudioApplicationClass) SharedInstance() AVAudioApplication

Accesses the shared audio application instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication/shared

type AVAudioApplicationMicrophoneInjectionPermission 

type AVAudioApplicationMicrophoneInjectionPermission int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication/MicrophoneInjectionPermission-swift.enum 

const (
	// AVAudioApplicationMicrophoneInjectionPermissionDenied: A person denies the app permission to add audio to calls.
	AVAudioApplicationMicrophoneInjectionPermissionDenied AVAudioApplicationMicrophoneInjectionPermission = 'd'<<24 | 'e'<<16 | 'n'<<8 | 'y' // 'deny'
	// AVAudioApplicationMicrophoneInjectionPermissionGranted: A person grants the app permission to add audio to calls.
	AVAudioApplicationMicrophoneInjectionPermissionGranted AVAudioApplicationMicrophoneInjectionPermission = 'g'<<24 | 'r'<<16 | 'n'<<8 | 't' // 'grnt'
	// AVAudioApplicationMicrophoneInjectionPermissionServiceDisabled: A person disables this service for all apps.
	AVAudioApplicationMicrophoneInjectionPermissionServiceDisabled AVAudioApplicationMicrophoneInjectionPermission = 's'<<24 | 'r'<<16 | 'd'<<8 | 's' // 'srds'
	// AVAudioApplicationMicrophoneInjectionPermissionUndetermined: The app hasn’t requested a person’s permission to add audio to calls.
	AVAudioApplicationMicrophoneInjectionPermissionUndetermined AVAudioApplicationMicrophoneInjectionPermission = 'u'<<24 | 'n'<<16 | 'd'<<8 | 't' // 'undt'
)

func (AVAudioApplicationMicrophoneInjectionPermission) String 

func (e AVAudioApplicationMicrophoneInjectionPermission) String() string

type AVAudioApplicationMicrophoneInjectionPermissionHandler 

type AVAudioApplicationMicrophoneInjectionPermissionHandler = func(AVAudioApplicationMicrophoneInjectionPermission)

AVAudioApplicationMicrophoneInjectionPermissionHandler handles completion with a primitive value.

Used by:

  • [AVAudioApplication.RequestMicrophoneInjectionPermissionWithCompletionHandler]

type AVAudioApplicationRecordPermission 

type AVAudioApplicationRecordPermission int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication/recordPermission-swift.enum 

const (
	// AVAudioApplicationRecordPermissionDenied: Indicates the user denies the app permission to record audio.
	AVAudioApplicationRecordPermissionDenied AVAudioApplicationRecordPermission = 'd'<<24 | 'e'<<16 | 'n'<<8 | 'y' // 'deny'
	// AVAudioApplicationRecordPermissionGranted: Indicates the user grants the app permission to record audio.
	AVAudioApplicationRecordPermissionGranted AVAudioApplicationRecordPermission = 'g'<<24 | 'r'<<16 | 'n'<<8 | 't' // 'grnt'
	// AVAudioApplicationRecordPermissionUndetermined: Indicates the app hasn’t requested recording permission.
	AVAudioApplicationRecordPermissionUndetermined AVAudioApplicationRecordPermission = 'u'<<24 | 'n'<<16 | 'd'<<8 | 't' // 'undt'
)

func (AVAudioApplicationRecordPermission) String 

func (e AVAudioApplicationRecordPermission) String() string

type AVAudioBuffer 

type AVAudioBuffer struct {
	objectivec.Object
}

An object that represents a buffer of audio data with a format.

Getting the Buffer Format

Getting the Audio Buffers

See: https://developer.apple.com/documentation/AVFAudio/AVAudioBuffer

func AVAudioBufferFromID 

func AVAudioBufferFromID(id objc.ID) AVAudioBuffer

AVAudioBufferFromID constructs a AVAudioBuffer from an objc.ID.

An object that represents a buffer of audio data with a format.

func NewAVAudioBuffer 

func NewAVAudioBuffer() AVAudioBuffer

NewAVAudioBuffer creates a new AVAudioBuffer instance.

func (AVAudioBuffer) AudioBufferList 

func (a AVAudioBuffer) AudioBufferList() objectivec.IObject

The buffer’s underlying audio buffer list.

Discussion

A buffer list is a variable length array that contains an array of audio buffer instances. You use it with lower-level Core Audio and Audio Toolbox API.

You must not modify the buffer list structure, although you can modify buffer contents.

The `mDataByteSize` fields of this audio buffer list express the buffer’s current [FrameLength].

See: https://developer.apple.com/documentation/AVFAudio/AVAudioBuffer/audioBufferList

func (AVAudioBuffer) Autorelease 

func (a AVAudioBuffer) Autorelease() AVAudioBuffer

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioBuffer) Format 

func (a AVAudioBuffer) Format() IAVAudioFormat

The format of the audio in the buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioBuffer/format

func (AVAudioBuffer) Init 

func (a AVAudioBuffer) Init() AVAudioBuffer

Init initializes the instance.

func (AVAudioBuffer) MutableAudioBufferList 

func (a AVAudioBuffer) MutableAudioBufferList() objectivec.IObject

A mutable version of the buffer’s underlying audio buffer list.

Discussion

You use this with some lower-level Core Audio and Audio Toolbox APIs that require a mutable AudioBufferList (for example, the AudioConverterConvertComplexBuffer(_:_:_:_:) function).

The `mDataByteSize` fields of this audio buffer list express the buffer’s current [FrameCapacity]. If you alter the capacity, modify the buffer’s `frameLength` to match.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioBuffer/mutableAudioBufferList

type AVAudioBufferClass 

type AVAudioBufferClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioBufferClass 

func GetAVAudioBufferClass() AVAudioBufferClass

GetAVAudioBufferClass returns the class object for AVAudioBuffer.

func (AVAudioBufferClass) Alloc 

func (ac AVAudioBufferClass) Alloc() AVAudioBuffer

Alloc allocates memory for a new instance of the class.

func (AVAudioBufferClass) Class 

func (ac AVAudioBufferClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioChannelCount 

type AVAudioChannelCount = uint32

AVAudioChannelCount is the number of audio channels.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelCount

type AVAudioChannelLayout 

type AVAudioChannelLayout struct {
	objectivec.Object
}

An object that describes the roles of a set of audio channels.

Overview

The AVAudioChannelLayout class is a thin wrapper for Core Audio’s AudioChannelLayout.

Creating an Audio Channel Layout

Getting Audio Channel Layout Properties

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout

func AVAudioChannelLayoutFromID 

func AVAudioChannelLayoutFromID(id objc.ID) AVAudioChannelLayout

AVAudioChannelLayoutFromID constructs a AVAudioChannelLayout from an objc.ID.

An object that describes the roles of a set of audio channels.

func NewAVAudioChannelLayout 

func NewAVAudioChannelLayout() AVAudioChannelLayout

NewAVAudioChannelLayout creates a new AVAudioChannelLayout instance.

func NewAudioChannelLayoutWithLayout 

func NewAudioChannelLayoutWithLayout(layout IAVAudioChannelLayout) AVAudioChannelLayout

Creates an audio channel layout object from an existing one.

layout: The existing audio channel layout object.

Return Value

A new AVAudioChannelLayout object.

Discussion

If the audio channel layout object’s tag is kAudioChannelLayoutTag_UseChannelDescriptions, this initializer attempts to convert it to a more specific tag.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout/init(layout:)

func NewAudioChannelLayoutWithLayoutTag 

func NewAudioChannelLayoutWithLayoutTag(layoutTag objectivec.IObject) AVAudioChannelLayout

Creates an audio channel layout object from a layout tag.

layoutTag: The audio channel layout tag.

Return Value

A new AVAudioChannelLayout object, or `nil` if `layoutTag` is kAudioChannelLayoutTag_UseChannelDescriptions or kAudioChannelLayoutTag_UseChannelBitmap.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout/init(layoutTag:) layoutTag is a [coreaudiotypes.AudioChannelLayoutTag].

func (AVAudioChannelLayout) AVChannelLayoutKey 

func (a AVAudioChannelLayout) AVChannelLayoutKey() string

See: https://developer.apple.com/documentation/avfaudio/avchannellayoutkey

func (AVAudioChannelLayout) Autorelease 

func (a AVAudioChannelLayout) Autorelease() AVAudioChannelLayout

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioChannelLayout) ChannelCount 

func (a AVAudioChannelLayout) ChannelCount() AVAudioChannelCount

The number of channels of audio data.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout/channelCount

func (AVAudioChannelLayout) EncodeWithCoder 

func (a AVAudioChannelLayout) EncodeWithCoder(coder foundation.INSCoder)

func (AVAudioChannelLayout) Init 

func (a AVAudioChannelLayout) Init() AVAudioChannelLayout

Init initializes the instance.

func (AVAudioChannelLayout) InitWithLayout 

func (a AVAudioChannelLayout) InitWithLayout(layout IAVAudioChannelLayout) AVAudioChannelLayout

Creates an audio channel layout object from an existing one.

layout: The existing audio channel layout object.

Return Value

A new AVAudioChannelLayout object.

Discussion

If the audio channel layout object’s tag is kAudioChannelLayoutTag_UseChannelDescriptions, this initializer attempts to convert it to a more specific tag.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout/init(layout:)

func (AVAudioChannelLayout) InitWithLayoutTag 

func (a AVAudioChannelLayout) InitWithLayoutTag(layoutTag objectivec.IObject) AVAudioChannelLayout

Creates an audio channel layout object from a layout tag.

layoutTag: The audio channel layout tag.

layoutTag is a [coreaudiotypes.AudioChannelLayoutTag].

Return Value

A new AVAudioChannelLayout object, or `nil` if `layoutTag` is kAudioChannelLayoutTag_UseChannelDescriptions or kAudioChannelLayoutTag_UseChannelBitmap.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout/init(layoutTag:) layoutTag is a [coreaudiotypes.AudioChannelLayoutTag].

func (AVAudioChannelLayout) Layout 

func (a AVAudioChannelLayout) Layout() IAVAudioChannelLayout

The underlying audio channel layout.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout/layout

func (AVAudioChannelLayout) LayoutTag 

func (a AVAudioChannelLayout) LayoutTag() objectivec.IObject

The audio channel’s underlying layout tag.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout/layoutTag

type AVAudioChannelLayoutClass 

type AVAudioChannelLayoutClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioChannelLayoutClass 

func GetAVAudioChannelLayoutClass() AVAudioChannelLayoutClass

GetAVAudioChannelLayoutClass returns the class object for AVAudioChannelLayout.

func (AVAudioChannelLayoutClass) Alloc 

func (ac AVAudioChannelLayoutClass) Alloc() AVAudioChannelLayout

Alloc allocates memory for a new instance of the class.

func (AVAudioChannelLayoutClass) Class 

func (ac AVAudioChannelLayoutClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

func (AVAudioChannelLayoutClass) LayoutWithLayout 

func (_AVAudioChannelLayoutClass AVAudioChannelLayoutClass) LayoutWithLayout(layout IAVAudioChannelLayout) AVAudioChannelLayout

Creates an audio channel layout object from an existing one.

layout: The existing audio channel layout object.

Return Value

A new AVAudioChannelLayout object.

Discussion

If the layout’s tag is kAudioChannelLayoutTag_UseChannelDescriptions, the method attempts to convert it to a more specific tag.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout/layoutWithLayout:

func (AVAudioChannelLayoutClass) LayoutWithLayoutTag 

func (_AVAudioChannelLayoutClass AVAudioChannelLayoutClass) LayoutWithLayoutTag(layoutTag objectivec.IObject) AVAudioChannelLayout

Creates an audio channel layout object from an audio channel layout tag.

layoutTag: The audio channel layout tag.

layoutTag is a [coreaudiotypes.AudioChannelLayoutTag].

Return Value

A new AVAudioChannelLayout object.

Discussion

If the provided audio channel layout object’s tag is kAudioChannelLayoutTag_UseChannelDescriptions, this initializer attempts to convert it to a more specific tag.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout/layoutWithLayoutTag: layoutTag is a [coreaudiotypes.AudioChannelLayoutTag].

type AVAudioCommonFormat 

type AVAudioCommonFormat uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCommonFormat 

const (
	// AVAudioOtherFormat: A format other than one the enumeration specifies.
	AVAudioOtherFormat AVAudioCommonFormat = 0
	// AVAudioPCMFormatFloat32: A format that represents the standard format as native-endian floats.
	AVAudioPCMFormatFloat32 AVAudioCommonFormat = 1
	// AVAudioPCMFormatFloat64: A format that represents native-endian doubles.
	AVAudioPCMFormatFloat64 AVAudioCommonFormat = 2
	// AVAudioPCMFormatInt16: A format that represents signed 16-bit native-endian integers.
	AVAudioPCMFormatInt16 AVAudioCommonFormat = 3
	// AVAudioPCMFormatInt32: A format that represents signed 32-bit native-endian integers.
	AVAudioPCMFormatInt32 AVAudioCommonFormat = 4
)

func (AVAudioCommonFormat) String 

func (e AVAudioCommonFormat) String() string

type AVAudioCompressedBuffer 

type AVAudioCompressedBuffer struct {
	AVAudioBuffer
}

An object that represents an audio buffer that you use for compressed audio formats.

Creating an Audio Buffer

Getting Audio Buffer Properties

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer

func AVAudioCompressedBufferFromID 

func AVAudioCompressedBufferFromID(id objc.ID) AVAudioCompressedBuffer

AVAudioCompressedBufferFromID constructs a AVAudioCompressedBuffer from an objc.ID.

An object that represents an audio buffer that you use for compressed audio formats.

func NewAVAudioCompressedBuffer 

func NewAVAudioCompressedBuffer() AVAudioCompressedBuffer

NewAVAudioCompressedBuffer creates a new AVAudioCompressedBuffer instance.

func NewAudioCompressedBufferWithFormatPacketCapacity 

func NewAudioCompressedBufferWithFormatPacketCapacity(format IAVAudioFormat, packetCapacity AVAudioPacketCount) AVAudioCompressedBuffer

Creates a buffer that contains constant bytes per packet of audio data in a compressed state.

format: The format of the audio the buffer contains.

packetCapacity: The capacity of the buffer, in packets.

Return Value

A new AVAudioCompressedBuffer instance.

Discussion

This fails if the format is PCM or if the format has variable bytes per packet (for example, `format.StreamDescription()->mBytesPerPacket == 0`).

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/init(format:packetCapacity:)

func NewAudioCompressedBufferWithFormatPacketCapacityMaximumPacketSize 

func NewAudioCompressedBufferWithFormatPacketCapacityMaximumPacketSize(format IAVAudioFormat, packetCapacity AVAudioPacketCount, maximumPacketSize int) AVAudioCompressedBuffer

Creates a buffer that contains audio data in a compressed state.

format: The format of the audio the buffer contains.

packetCapacity: The capacity of the buffer, in packets.

maximumPacketSize: The maximum size in bytes of a packet in a compressed state.

Return Value

A new AVAudioCompressedBuffer instance.

Discussion

You can obtain the maximum packet size from the [MaximumOutputPacketSize] property of an AVAudioConverter you configure for encoding this format.

The method raises an exception if the format is PCM.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/init(format:packetCapacity:maximumPacketSize:)

func (AVAudioCompressedBuffer) Autorelease 

func (a AVAudioCompressedBuffer) Autorelease() AVAudioCompressedBuffer

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioCompressedBuffer) ByteCapacity 

func (a AVAudioCompressedBuffer) ByteCapacity() uint32

The number of packets the buffer contains.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/byteCapacity

func (AVAudioCompressedBuffer) ByteLength 

func (a AVAudioCompressedBuffer) ByteLength() uint32

The number of valid bytes in the buffer.

Discussion

You can change this value as part of an operation that modifies the contents.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/byteLength

func (AVAudioCompressedBuffer) Data 

func (a AVAudioCompressedBuffer) Data() unsafe.Pointer

The audio buffer’s data bytes.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/data

func (AVAudioCompressedBuffer) Init 

func (a AVAudioCompressedBuffer) Init() AVAudioCompressedBuffer

Init initializes the instance.

func (AVAudioCompressedBuffer) InitWithFormatPacketCapacity 

func (a AVAudioCompressedBuffer) InitWithFormatPacketCapacity(format IAVAudioFormat, packetCapacity AVAudioPacketCount) AVAudioCompressedBuffer

Creates a buffer that contains constant bytes per packet of audio data in a compressed state.

format: The format of the audio the buffer contains.

packetCapacity: The capacity of the buffer, in packets.

Return Value

A new AVAudioCompressedBuffer instance.

Discussion

This fails if the format is PCM or if the format has variable bytes per packet (for example, `format.StreamDescription()->mBytesPerPacket == 0`).

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/init(format:packetCapacity:)

func (AVAudioCompressedBuffer) InitWithFormatPacketCapacityMaximumPacketSize 

func (a AVAudioCompressedBuffer) InitWithFormatPacketCapacityMaximumPacketSize(format IAVAudioFormat, packetCapacity AVAudioPacketCount, maximumPacketSize int) AVAudioCompressedBuffer

Creates a buffer that contains audio data in a compressed state.

format: The format of the audio the buffer contains.

packetCapacity: The capacity of the buffer, in packets.

maximumPacketSize: The maximum size in bytes of a packet in a compressed state.

Return Value

A new AVAudioCompressedBuffer instance.

Discussion

You can obtain the maximum packet size from the [MaximumOutputPacketSize] property of an AVAudioConverter you configure for encoding this format.

The method raises an exception if the format is PCM.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/init(format:packetCapacity:maximumPacketSize:)

func (AVAudioCompressedBuffer) MaximumPacketSize 

func (a AVAudioCompressedBuffer) MaximumPacketSize() int

The maximum size of a packet, in bytes.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/maximumPacketSize

func (AVAudioCompressedBuffer) PacketCapacity 

func (a AVAudioCompressedBuffer) PacketCapacity() AVAudioPacketCount

The total number of packets that the buffer can contain.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/packetCapacity

func (AVAudioCompressedBuffer) PacketCount 

func (a AVAudioCompressedBuffer) PacketCount() AVAudioPacketCount

The number of packets currently in the buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/packetCount

func (AVAudioCompressedBuffer) PacketDependencies 

func (a AVAudioCompressedBuffer) PacketDependencies() objectivec.IObject

The buffer’s array of packet dependencies.

Discussion

If the audio format doesn’t use packet dependencies, this value is `nil`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/packetDependencies-5oae6

func (AVAudioCompressedBuffer) PacketDescriptions 

func (a AVAudioCompressedBuffer) PacketDescriptions() objectivec.IObject

The buffer’s array of packet descriptions.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer/packetDescriptions

func (AVAudioCompressedBuffer) SetByteLength 

func (a AVAudioCompressedBuffer) SetByteLength(value uint32)

func (AVAudioCompressedBuffer) SetPacketCount 

func (a AVAudioCompressedBuffer) SetPacketCount(value AVAudioPacketCount)

type AVAudioCompressedBufferClass 

type AVAudioCompressedBufferClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioCompressedBufferClass 

func GetAVAudioCompressedBufferClass() AVAudioCompressedBufferClass

GetAVAudioCompressedBufferClass returns the class object for AVAudioCompressedBuffer.

func (AVAudioCompressedBufferClass) Alloc 

func (ac AVAudioCompressedBufferClass) Alloc() AVAudioCompressedBuffer

Alloc allocates memory for a new instance of the class.

func (AVAudioCompressedBufferClass) Class 

func (ac AVAudioCompressedBufferClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioConnectionPoint 

type AVAudioConnectionPoint struct {
	objectivec.Object
}

A representation of either a source or destination connection point in the audio engine.

Overview

Instances of this class are immutable.

Creating a Connection Point

Getting Connection Point Properties

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConnectionPoint

func AVAudioConnectionPointFromID 

func AVAudioConnectionPointFromID(id objc.ID) AVAudioConnectionPoint

AVAudioConnectionPointFromID constructs a AVAudioConnectionPoint from an objc.ID.

A representation of either a source or destination connection point in the audio engine.

func NewAVAudioConnectionPoint 

func NewAVAudioConnectionPoint() AVAudioConnectionPoint

NewAVAudioConnectionPoint creates a new AVAudioConnectionPoint instance.

func NewAudioConnectionPointWithNodeBus 

func NewAudioConnectionPointWithNodeBus(node IAVAudioNode, bus AVAudioNodeBus) AVAudioConnectionPoint

Creates a connection point object.

node: The source or destination node.

bus: The output or input bus on the node.

Discussion

If the node is `nil`, this method fails and returns `nil`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConnectionPoint/init(node:bus:)

func (AVAudioConnectionPoint) Autorelease 

func (a AVAudioConnectionPoint) Autorelease() AVAudioConnectionPoint

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioConnectionPoint) Bus 

func (a AVAudioConnectionPoint) Bus() AVAudioNodeBus

The bus on the node in the connection point.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConnectionPoint/bus

func (AVAudioConnectionPoint) Init 

func (a AVAudioConnectionPoint) Init() AVAudioConnectionPoint

Init initializes the instance.

func (AVAudioConnectionPoint) InitWithNodeBus 

func (a AVAudioConnectionPoint) InitWithNodeBus(node IAVAudioNode, bus AVAudioNodeBus) AVAudioConnectionPoint

Creates a connection point object.

node: The source or destination node.

bus: The output or input bus on the node.

Discussion

If the node is `nil`, this method fails and returns `nil`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConnectionPoint/init(node:bus:)

func (AVAudioConnectionPoint) InputConnectionPointForNodeInputBus 

func (a AVAudioConnectionPoint) InputConnectionPointForNodeInputBus(node IAVAudioNode, bus AVAudioNodeBus) IAVAudioConnectionPoint

Returns connection information about a node’s input bus.

node: The node with the input connection you’re querying.

bus: The node’s input bus for the connection you’re querying.

Return Value

An AVAudioConnectionPoint object with connection information on the node’s input bus.

Discussion

Connections are always one-to-one or one-to-many. This method returns `nil` if there’s no connection on the node’s specified input bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/inputConnectionPoint(for:inputBus:)

func (AVAudioConnectionPoint) Node 

func (a AVAudioConnectionPoint) Node() IAVAudioNode

The node in the connection point.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConnectionPoint/node

func (AVAudioConnectionPoint) OutputConnectionPointsForNodeOutputBus 

func (a AVAudioConnectionPoint) OutputConnectionPointsForNodeOutputBus(node IAVAudioNode, bus AVAudioNodeBus) []AVAudioConnectionPoint

Returns connection information about a node’s output bus.

node: The node with the output connections you’re querying.

bus: The node’s output bus for connections you’re querying.

Return Value

An array of AVAudioConnectionPoint objects with connection information on the node’s output bus.

Discussion

Connections are always one-to-one or one-to-many. This method returns an empty array if there are no connections on the node’s specified output bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/outputConnectionPoints(for:outputBus:)

type AVAudioConnectionPointClass 

type AVAudioConnectionPointClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioConnectionPointClass 

func GetAVAudioConnectionPointClass() AVAudioConnectionPointClass

GetAVAudioConnectionPointClass returns the class object for AVAudioConnectionPoint.

func (AVAudioConnectionPointClass) Alloc 

func (ac AVAudioConnectionPointClass) Alloc() AVAudioConnectionPoint

Alloc allocates memory for a new instance of the class.

func (AVAudioConnectionPointClass) Class 

func (ac AVAudioConnectionPointClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioContentSource 

type AVAudioContentSource int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioContentSource 

const (
	AVAudioContentSource_AV_Spatial_Live               AVAudioContentSource = 41
	AVAudioContentSource_AV_Spatial_Offline            AVAudioContentSource = 39
	AVAudioContentSource_AV_Traditional_Live           AVAudioContentSource = 40
	AVAudioContentSource_AV_Traditional_Offline        AVAudioContentSource = 38
	AVAudioContentSource_AppleAV_Spatial_Live          AVAudioContentSource = 9
	AVAudioContentSource_AppleAV_Spatial_Offline       AVAudioContentSource = 7
	AVAudioContentSource_AppleAV_Traditional_Live      AVAudioContentSource = 8
	AVAudioContentSource_AppleAV_Traditional_Offline   AVAudioContentSource = 6
	AVAudioContentSource_AppleCapture_Spatial          AVAudioContentSource = 2
	AVAudioContentSource_AppleCapture_Spatial_Enhanced AVAudioContentSource = 3
	AVAudioContentSource_AppleCapture_Traditional      AVAudioContentSource = 1
	AVAudioContentSource_AppleMusic_Spatial            AVAudioContentSource = 5
	AVAudioContentSource_AppleMusic_Traditional        AVAudioContentSource = 4
	AVAudioContentSource_ApplePassthrough              AVAudioContentSource = 10
	AVAudioContentSource_Capture_Spatial               AVAudioContentSource = 34
	AVAudioContentSource_Capture_Spatial_Enhanced      AVAudioContentSource = 35
	AVAudioContentSource_Capture_Traditional           AVAudioContentSource = 33
	AVAudioContentSource_Music_Spatial                 AVAudioContentSource = 37
	AVAudioContentSource_Music_Traditional             AVAudioContentSource = 36
	AVAudioContentSource_Passthrough                   AVAudioContentSource = 42
	AVAudioContentSource_Reserved                      AVAudioContentSource = 0
	AVAudioContentSource_Unspecified                   AVAudioContentSource = -1
)

func (AVAudioContentSource) String 

func (e AVAudioContentSource) String() string

type AVAudioConverter 

type AVAudioConverter struct {
	objectivec.Object
}

An object that converts streams of audio between formats.

Overview

The audio converter class transforms audio between file formats and audio encodings.

Supported transformations include:

- PCM float, integer, or bit depth conversions - PCM sample rate conversion - PCM interleaving and deinterleaving - Encoding PCM to compressed formats - Decoding compressed formats to PCM

A single audio converter instance may perform more than one of the above transformations.

Creating an Audio Converter

Converting Audio Formats

Resetting an Audio Converter

Getting Audio Converter Properties

Getting Bit Rate Properties

Getting Sample Rate Properties

Getting Priming Information

Managing packet dependencies

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter

func AVAudioConverterFromID 

func AVAudioConverterFromID(id objc.ID) AVAudioConverter

AVAudioConverterFromID constructs a AVAudioConverter from an objc.ID.

An object that converts streams of audio between formats.

func NewAVAudioConverter 

func NewAVAudioConverter() AVAudioConverter

NewAVAudioConverter creates a new AVAudioConverter instance.

func NewAudioConverterFromFormatToFormat 

func NewAudioConverterFromFormatToFormat(fromFormat IAVAudioFormat, toFormat IAVAudioFormat) AVAudioConverter

Creates an audio converter object from the specified input and output formats.

fromFormat: The input audio format.

toFormat: The audio format to convert to.

Return Value

An AVAudioConverter instance, or `nil` if the format conversion isn’t possible.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/init(from:to:)

func (AVAudioConverter) ApplicableEncodeBitRates 

func (a AVAudioConverter) ApplicableEncodeBitRates() []foundation.NSNumber

An array of bit rates the framework applies during encoding according to the current formats and settings.

Discussion

This property returns `nil` if you’re not encoding.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/applicableEncodeBitRates

func (AVAudioConverter) ApplicableEncodeSampleRates 

func (a AVAudioConverter) ApplicableEncodeSampleRates() []foundation.NSNumber

An array of output sample rates that the converter applies according to the current formats and settings, when encoding.

Discussion

This property returns `nil` if you’re not encoding.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/applicableEncodeSampleRates

func (AVAudioConverter) AudioSyncPacketFrequency 

func (a AVAudioConverter) AudioSyncPacketFrequency() int

Discussion

Number of packets between consecutive sync packets.

A sync packet is an independently-decodable packet that completely refreshes the decoder without needing to decode other packets. When compressing to a format which supports it (such as APAC), the audio sync packet frequency indicates the distance in packets between two sync packets, with non-sync packets between. This is useful to set when saving compressed packets to a file and efficient random access is desired. Note: Separating sync packets by at least one second of encoded audio (e.g. 75 packets) is recommended.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/audioSyncPacketFrequency

func (AVAudioConverter) Autorelease 

func (a AVAudioConverter) Autorelease() AVAudioConverter

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioConverter) AvailableEncodeBitRates 

func (a AVAudioConverter) AvailableEncodeBitRates() []foundation.NSNumber

An array of all bit rates the codec provides when encoding.

Discussion

This property returns `nil` if you’re not encoding.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/availableEncodeBitRates

func (AVAudioConverter) AvailableEncodeChannelLayoutTags 

func (a AVAudioConverter) AvailableEncodeChannelLayoutTags() []foundation.NSNumber

An array of all output channel layout tags the codec provides when encoding.

Discussion

This property returns `nil` if you’re not encoding.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/availableEncodeChannelLayoutTags

func (AVAudioConverter) AvailableEncodeSampleRates 

func (a AVAudioConverter) AvailableEncodeSampleRates() []foundation.NSNumber

An array of all output sample rates the codec provides when encoding.

Discussion

This property returns `nil` if you’re not encoding.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/availableEncodeSampleRates

func (AVAudioConverter) BitRate 

func (a AVAudioConverter) BitRate() int

The bit rate, in bits per second.

Discussion

This value only applies when encoding.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/bitRate

func (AVAudioConverter) BitRateStrategy 

func (a AVAudioConverter) BitRateStrategy() string

A key value constant the framework uses during encoding.

Discussion

This property returns `nil` if you’re not encoding. For information about possible values, see AVEncoderBitRateStrategyKey.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/bitRateStrategy

func (AVAudioConverter) ChannelMap 

func (a AVAudioConverter) ChannelMap() []foundation.NSNumber

An array of integers that indicates which input to derive each output from.

Discussion

The array size equals the number of output channels. Each element’s value is the input channel number, starting with zero, that the framework copies to that output.

A negative value means that the output channel doesn’t have a source and is silent.

Setting a channel map overrides channel mapping due to any channel layouts in the input and output formats that you supply.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/channelMap

func (AVAudioConverter) ContentSource 

func (a AVAudioConverter) ContentSource() AVAudioContentSource

Discussion

Index to select a pre-defined content source type that describes the content type and how it was generated. Note: This is only supported when compressing audio to formats which support it.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/contentSource

func (AVAudioConverter) ConvertToBufferErrorWithInputFromBlock 

func (a AVAudioConverter) ConvertToBufferErrorWithInputFromBlock(outputBuffer IAVAudioBuffer, outError foundation.INSError, inputBlock AVAudioConverterInputBlock) AVAudioConverterOutputStatus

Performs a conversion between audio formats, if the system supports it.

outputBuffer: The output audio buffer.

outError: The error if the conversion fails.

inputBlock: A block the framework calls to get input data.

Return Value

An AVAudioConverterOutputStatus type that indicates the conversion status.

Discussion

The method attempts to fill the buffer to its capacity. On return, the buffer’s length indicates the number of sample frames the framework successfully converts.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/convert(to:error:withInputFrom:)

func (AVAudioConverter) ConvertToBufferFromBufferError 

func (a AVAudioConverter) ConvertToBufferFromBufferError(outputBuffer IAVAudioPCMBuffer, inputBuffer IAVAudioPCMBuffer) (bool, error)

Performs a basic conversion between audio formats that doesn’t involve converting codecs or sample rates.

outputBuffer: The output audio buffer.

inputBuffer: The input audio buffer.

Discussion

The output buffer’s [FrameCapacity] value needs to be at least at large as the [FrameLength] value of the `inputBuffer`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/convert(to:from:)

func (AVAudioConverter) Dither 

func (a AVAudioConverter) Dither() bool

A Boolean value that indicates whether dither is on.

Discussion

This property defaults to `false`. When `true`, the framework determines whether dithering makes sense for the formats and settings.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/dither

func (AVAudioConverter) Downmix 

func (a AVAudioConverter) Downmix() bool

A Boolean value that indicates whether the framework mixes the channels instead of remapping.

Discussion

This property defaults to `false`, indicating that the framework remaps the channels. When `true`, and channel remapping is necessary, the framework mixes the channels.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/downmix

func (AVAudioConverter) DynamicRangeControlConfiguration 

func (a AVAudioConverter) DynamicRangeControlConfiguration() AVAudioDynamicRangeControlConfiguration

Discussion

Encoder Dynamic Range Control (DRC) configuration.

When supported by the encoder, this property controls which configuration is applied when a bitstream is generated. Note: This is only supported when compressing audio to formats which support it.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/dynamicRangeControlConfiguration

func (AVAudioConverter) Init 

func (a AVAudioConverter) Init() AVAudioConverter

Init initializes the instance.

func (AVAudioConverter) InitFromFormatToFormat 

func (a AVAudioConverter) InitFromFormatToFormat(fromFormat IAVAudioFormat, toFormat IAVAudioFormat) AVAudioConverter

Creates an audio converter object from the specified input and output formats.

fromFormat: The input audio format.

toFormat: The audio format to convert to.

Return Value

An AVAudioConverter instance, or `nil` if the format conversion isn’t possible.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/init(from:to:)

func (AVAudioConverter) InputFormat 

func (a AVAudioConverter) InputFormat() IAVAudioFormat

The format of the input audio stream.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/inputFormat

func (AVAudioConverter) MagicCookie 

func (a AVAudioConverter) MagicCookie() foundation.INSData

An object that contains metadata for encoders and decoders.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/magicCookie

func (AVAudioConverter) MaximumOutputPacketSize 

func (a AVAudioConverter) MaximumOutputPacketSize() int

The maximum size of an output packet, in bytes.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/maximumOutputPacketSize

func (AVAudioConverter) OutputFormat 

func (a AVAudioConverter) OutputFormat() IAVAudioFormat

The format of the output audio stream.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/outputFormat

func (AVAudioConverter) PrimeInfo 

func (a AVAudioConverter) PrimeInfo() AVAudioConverterPrimeInfo

The number of priming frames the converter uses.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/primeInfo

func (AVAudioConverter) PrimeMethod 

func (a AVAudioConverter) PrimeMethod() AVAudioConverterPrimeMethod

The priming method the sample rate converter or decoder uses.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/primeMethod

func (AVAudioConverter) Reset 

func (a AVAudioConverter) Reset()

Resets the converter so you can convert a new audio stream.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/reset()

func (AVAudioConverter) SampleRateConverterAlgorithm 

func (a AVAudioConverter) SampleRateConverterAlgorithm() string

The priming method the sample rate converter or decoder uses.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/sampleRateConverterAlgorithm

func (AVAudioConverter) SampleRateConverterQuality 

func (a AVAudioConverter) SampleRateConverterQuality() int

A sample rate converter algorithm key value.

Discussion

For information about possible key values, see AVSampleRateConverterAlgorithmKey.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter/sampleRateConverterQuality

func (AVAudioConverter) SetAudioSyncPacketFrequency 

func (a AVAudioConverter) SetAudioSyncPacketFrequency(value int)

func (AVAudioConverter) SetBitRate 

func (a AVAudioConverter) SetBitRate(value int)

func (AVAudioConverter) SetBitRateStrategy 

func (a AVAudioConverter) SetBitRateStrategy(value string)

func (AVAudioConverter) SetChannelMap 

func (a AVAudioConverter) SetChannelMap(value []foundation.NSNumber)

func (AVAudioConverter) SetContentSource 

func (a AVAudioConverter) SetContentSource(value AVAudioContentSource)

func (AVAudioConverter) SetDither 

func (a AVAudioConverter) SetDither(value bool)

func (AVAudioConverter) SetDownmix 

func (a AVAudioConverter) SetDownmix(value bool)

func (AVAudioConverter) SetDynamicRangeControlConfiguration 

func (a AVAudioConverter) SetDynamicRangeControlConfiguration(value AVAudioDynamicRangeControlConfiguration)

func (AVAudioConverter) SetMagicCookie 

func (a AVAudioConverter) SetMagicCookie(value foundation.INSData)

func (AVAudioConverter) SetPrimeInfo 

func (a AVAudioConverter) SetPrimeInfo(value AVAudioConverterPrimeInfo)

func (AVAudioConverter) SetPrimeMethod 

func (a AVAudioConverter) SetPrimeMethod(value AVAudioConverterPrimeMethod)

func (AVAudioConverter) SetSampleRateConverterAlgorithm 

func (a AVAudioConverter) SetSampleRateConverterAlgorithm(value string)

func (AVAudioConverter) SetSampleRateConverterQuality 

func (a AVAudioConverter) SetSampleRateConverterQuality(value int)

type AVAudioConverterClass 

type AVAudioConverterClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioConverterClass 

func GetAVAudioConverterClass() AVAudioConverterClass

GetAVAudioConverterClass returns the class object for AVAudioConverter.

func (AVAudioConverterClass) Alloc 

func (ac AVAudioConverterClass) Alloc() AVAudioConverter

Alloc allocates memory for a new instance of the class.

func (AVAudioConverterClass) Class 

func (ac AVAudioConverterClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioConverterInputBlock 

type AVAudioConverterInputBlock = func(uint32, *AVAudioConverterInputStatus) AVAudioBuffer

AVAudioConverterInputBlock is a block to get input data for conversion, as necessary.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverterInputBlock

type AVAudioConverterInputStatus 

type AVAudioConverterInputStatus int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverterInputStatus 

const (
	// AVAudioConverterInputStatus_EndOfStream: A status that indicates you’re at the end of an audio stream.
	AVAudioConverterInputStatus_EndOfStream AVAudioConverterInputStatus = 2
	// AVAudioConverterInputStatus_HaveData: A status that indicates the normal case where you supply data to the converter.
	AVAudioConverterInputStatus_HaveData AVAudioConverterInputStatus = 0
	// AVAudioConverterInputStatus_NoDataNow: A status that indicates you’re out of data.
	AVAudioConverterInputStatus_NoDataNow AVAudioConverterInputStatus = 1
)

func (AVAudioConverterInputStatus) String 

func (e AVAudioConverterInputStatus) String() string

type AVAudioConverterOutputStatus 

type AVAudioConverterOutputStatus int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverterOutputStatus 

const (
	// AVAudioConverterOutputStatus_EndOfStream: A status that indicates the method reaches the end of the stream, and doesn’t return any data.
	AVAudioConverterOutputStatus_EndOfStream AVAudioConverterOutputStatus = 2
	// AVAudioConverterOutputStatus_Error: A status that indicates the method encounters an error.
	AVAudioConverterOutputStatus_Error AVAudioConverterOutputStatus = 3
	// AVAudioConverterOutputStatus_HaveData: A status that indicates that the method returns all of the requested data.
	AVAudioConverterOutputStatus_HaveData AVAudioConverterOutputStatus = 0
	// AVAudioConverterOutputStatus_InputRanDry: A status that indicates the method doesn’t have enough input available to satisfy the request.
	AVAudioConverterOutputStatus_InputRanDry AVAudioConverterOutputStatus = 1
)

func (AVAudioConverterOutputStatus) String 

func (e AVAudioConverterOutputStatus) String() string

type AVAudioConverterPrimeInfo 

type AVAudioConverterPrimeInfo struct {
	LeadingFrames  AVAudioFrameCount // The number of leading (previous) input frames the converter requires to perform a high-quality conversion.
	TrailingFrames AVAudioFrameCount // The number of trailing input frames, past the end input frame, the converter requires to perform a high-quality conversion.

}

AVAudioConverterPrimeInfo - Priming information for audio conversion.

[Full Topic] [Full Topic]: https://developer.apple.com/documentation/AVFAudio/AVAudioConverterPrimeInfo

type AVAudioConverterPrimeMethod 

type AVAudioConverterPrimeMethod int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverterPrimeMethod 

const (
	// AVAudioConverterPrimeMethod_None: An option to prime the converter assumes leading and trailing frames are silence.
	AVAudioConverterPrimeMethod_None AVAudioConverterPrimeMethod = 2
	// AVAudioConverterPrimeMethod_Normal: An option to prime with trailing (zero latency) frames where the converter assumes the leading frames are silence.
	AVAudioConverterPrimeMethod_Normal AVAudioConverterPrimeMethod = 1
	// AVAudioConverterPrimeMethod_Pre: An option to prime with leading and trailing input frames.
	AVAudioConverterPrimeMethod_Pre AVAudioConverterPrimeMethod = 0
)

func (AVAudioConverterPrimeMethod) String 

func (e AVAudioConverterPrimeMethod) String() string

type AVAudioDynamicRangeControlConfiguration 

type AVAudioDynamicRangeControlConfiguration int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioDynamicRangeControlConfiguration 

const (
	AVAudioDynamicRangeControlConfiguration_Capture AVAudioDynamicRangeControlConfiguration = 4
	AVAudioDynamicRangeControlConfiguration_Movie   AVAudioDynamicRangeControlConfiguration = 3
	AVAudioDynamicRangeControlConfiguration_Music   AVAudioDynamicRangeControlConfiguration = 1
	AVAudioDynamicRangeControlConfiguration_None    AVAudioDynamicRangeControlConfiguration = 0
	AVAudioDynamicRangeControlConfiguration_Speech  AVAudioDynamicRangeControlConfiguration = 2
)

func (AVAudioDynamicRangeControlConfiguration) String 

func (e AVAudioDynamicRangeControlConfiguration) String() string

type AVAudioEngine 

type AVAudioEngine struct {
	objectivec.Object
}

An object that manages a graph of audio nodes, controls playback, and configures real-time rendering constraints.

Overview

An audio engine object contains a group of AVAudioNode instances that you attach to form an audio processing chain.

[media-3901205]

You can connect, disconnect, and remove audio nodes during runtime with minor limitations. Removing an audio node that has differing channel counts, or that’s a mixer, can break the graph. Reconnect audio nodes only when they’re upstream of a mixer.

By default, Audio Engine renders to a connected audio device in real time. You can configure the engine to operate in manual rendering mode when you need to render at, or faster than, real time. In that mode, the engine disconnects from audio devices and your app drives the rendering.

Create an Engine for Audio File Playback

To play an audio file, you create an AVAudioFile with a file that’s open for reading. Create an audio engine object and an AVAudioPlayerNode instance, and then attach the player node to the engine. Next, connect the player node to the audio engine’s output node. The engine performs audio output through an output node, which is a singleton that the engine creates the first time you access it.

Then schedule the audio file for full playback. The callback notifies your app when playback completes.

Before you play the audio, start the engine.

When you’re done, stop the player and the engine.

Attaching and Detaching Audio Nodes

Getting the Input, Output, and Main Mixer Nodes

Connecting and Disconnecting Audio Nodes

Managing MIDI Nodes

Playing Audio

Manually Rendering an Audio Engine

Getting Manual Rendering Properties

Using Connection Points

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine

func AVAudioEngineFromID 

func AVAudioEngineFromID(id objc.ID) AVAudioEngine

AVAudioEngineFromID constructs a AVAudioEngine from an objc.ID.

An object that manages a graph of audio nodes, controls playback, and configures real-time rendering constraints.

func NewAVAudioEngine 

func NewAVAudioEngine() AVAudioEngine

NewAVAudioEngine creates a new AVAudioEngine instance.

func (AVAudioEngine) AttachNode 

func (a AVAudioEngine) AttachNode(node IAVAudioNode)

Attaches an audio node to the audio engine.

node: The audio node to attach.

Discussion

An instance of AVAudioNode isn’t usable until you attach it to the audio engine using this method.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/attach(_:)

func (AVAudioEngine) AttachedNodes 

func (a AVAudioEngine) AttachedNodes() foundation.INSSet

A read-only set that contains the nodes you attach to the audio engine.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/attachedNodes

func (AVAudioEngine) AutoShutdownEnabled 

func (a AVAudioEngine) AutoShutdownEnabled() bool

A Boolean value that indicates whether autoshutdown is in an enabled state.

Discussion

If autoshutdown is in an enabled state, the engine can start and stop the audio hardware dynamically to conserve power. In watchOS, autoshutdown is always in an enabled state. For other platforms, it’s in a disabled state by default.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/isAutoShutdownEnabled

func (AVAudioEngine) Autorelease 

func (a AVAudioEngine) Autorelease() AVAudioEngine

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioEngine) ConnectMIDIToFormatEventListBlock 

func (a AVAudioEngine) ConnectMIDIToFormatEventListBlock(sourceNode IAVAudioNode, destinationNode IAVAudioNode, format IAVAudioFormat, tapBlock objectivec.IObject)

Establishes a MIDI connection between two nodes.

sourceNode: The source node.

destinationNode: The destination node.

format: If not [NULL], the engine uses this value for the format of the source audio node’s output bus. In all cases, the engine matches the format of the destination audio node’s input bus to the source node’s output bus.

tapBlock: If not [NULL], the source node’s event list block calls this on the real-time thread. The host can tap the MIDI data of the source node through this block.

tapBlock is a [audiotoolbox.AUMIDIEventListBlock].

Discussion

Use this to establish a MIDI connection between a source node and a destination node that has MIDI input capability. This method disconnects any existing MIDI connection that involves the destination node. When making the MIDI connection, this method overwrites the source node’s event list block.

The source node can only be an AVAudioUnit node with the type kAudioUnitType_MIDIProcessor. The destination node types can be kAudioUnitType_MusicDevice, kAudioUnitType_MusicEffect, or kAudioUnitType_MIDIProcessor.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/connectMIDI(_:to:format:eventListBlock:)-73cd1 tapBlock is a [audiotoolbox.AUMIDIEventListBlock].

func (AVAudioEngine) ConnectMIDIToNodesFormatEventListBlock 

func (a AVAudioEngine) ConnectMIDIToNodesFormatEventListBlock(sourceNode IAVAudioNode, destinationNodes []AVAudioNode, format IAVAudioFormat, tapBlock objectivec.IObject)

Establishes a MIDI connection between a source node and multiple destination nodes.

sourceNode: The source node.

destinationNodes: An array of objects that specify the destination nodes.

format: If not [NULL], the engine uses this value for the format of the source audio node’s output bus. In all cases, the format of the source node’s output bus has to match with the destination node’s output bus format.

tapBlock: If not [NULL], the source node’s event list block calls this on the real-time thread. The host can tap the MIDI data of the source node through this block.

tapBlock is a [audiotoolbox.AUMIDIEventListBlock].

Discussion

Use this to establish a MIDI connection between a source node and multiple destination nodes that have MIDI input capability. This method disconnects any existing MIDI connection that involves the destination node. When making the MIDI connection, this method overwrites the source node’s event list block.

The source node can only be an AVAudioUnit node with the type kAudioUnitType_MIDIProcessor. The destination node types can be kAudioUnitType_MusicDevice, kAudioUnitType_MusicEffect, or kAudioUnitType_MIDIProcessor.

MIDI connections made with this method specify a single destination connection (one-to-one) or multiple connections (one-to-many), but never many-to-one.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/connectMIDI(_:to:format:eventListBlock:)-7qtd5 tapBlock is a [audiotoolbox.AUMIDIEventListBlock].

func (AVAudioEngine) ConnectToConnectionPointsFromBusFormat 

func (a AVAudioEngine) ConnectToConnectionPointsFromBusFormat(sourceNode IAVAudioNode, destNodes []AVAudioConnectionPoint, sourceBus AVAudioNodeBus, format IAVAudioFormat)

Establishes a connection between a source node and multiple destination nodes.

sourceNode: The source node.

destNodes: An array of AVAudioConnectionPoint objects that specify destination nodes and busses.

sourceBus: The output bus on the source node.

format: If not [NULL], the framework uses this value for the format of the source audio node’s output bus. In all cases, the framework matches the format of the destination audio node’s input bus to the source audio node’s output bus.

Discussion

Connections that use this method are either one-to-one or one-to-many.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/connect(_:to:fromBus:format:)

func (AVAudioEngine) ConnectToFormat 

func (a AVAudioEngine) ConnectToFormat(node1 IAVAudioNode, node2 IAVAudioNode, format IAVAudioFormat)

Establishes a connection between two nodes.

node1: The source audio node.

node2: The destination audio node.

format: If not [NULL], the engine uses this value for the format of the source audio node’s output bus. In all cases, the engine matches the format of the destination audio node’s input bus to the source audio node’s output bus.

Discussion

This method calls [ConnectToFromBusToBusFormat] using bus `0` for the source audio node, and bus `0` for the destination audio node, except when a destination is a mixer, in which case, the destination is the mixer’s [NextAvailableInputBus].

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/connect(_:to:format:)

func (AVAudioEngine) ConnectToFromBusToBusFormat 

func (a AVAudioEngine) ConnectToFromBusToBusFormat(node1 IAVAudioNode, node2 IAVAudioNode, bus1 AVAudioNodeBus, bus2 AVAudioNodeBus, format IAVAudioFormat)

Establishes a connection between two nodes, specifying the input and output busses.

node1: The source audio node.

node2: The destination audio node.

bus1: The output bus of the source audio node.

bus2: The input bus of the destination audio node.

format: If not [NULL], the engine uses this value for the format of the source audio node’s output bus. In all cases, the engine matches the format of the destination audio node’s input bus to the source audio node’s output bus.

Discussion

Audio nodes have input and output busses (AVAudioNodeBus). Use this method to establish connections between audio nodes. Connections are always one-to-one, never one-to-many or many-to-one.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/connect(_:to:fromBus:toBus:format:)

func (AVAudioEngine) DetachNode 

func (a AVAudioEngine) DetachNode(node IAVAudioNode)

Detaches an audio node from the audio engine.

node: The audio node to detach.

Discussion

If necessary, the audio engine safely disconnects the audio node before detaching it.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/detach(_:)

func (AVAudioEngine) DisableManualRenderingMode 

func (a AVAudioEngine) DisableManualRenderingMode()

Sets the engine to render to or from an audio device.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/disableManualRenderingMode()

func (AVAudioEngine) DisconnectMIDIFrom 

func (a AVAudioEngine) DisconnectMIDIFrom(sourceNode IAVAudioNode, destinationNode IAVAudioNode)

Removes a MIDI connection between two nodes.

sourceNode: The node with the MIDI output to disconnect.

destinationNode: The node with the MIDI input to disconnect.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/disconnectMIDI(_:from:)-1kssy

func (AVAudioEngine) DisconnectMIDIFromNodes 

func (a AVAudioEngine) DisconnectMIDIFromNodes(sourceNode IAVAudioNode, destinationNodes []AVAudioNode)

Removes a MIDI connection between one source node and multiple destination nodes.

sourceNode: The node with the MIDI output to disconnect.

destinationNodes: A list of nodes with the MIDI input to disconnect.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/disconnectMIDI(_:from:)-7oaab

func (AVAudioEngine) DisconnectMIDIInput 

func (a AVAudioEngine) DisconnectMIDIInput(node IAVAudioNode)

Disconnects all input MIDI connections from a node.

node: The node with the MIDI input to disconnect.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/disconnectMIDIInput(_:)

func (AVAudioEngine) DisconnectMIDIOutput 

func (a AVAudioEngine) DisconnectMIDIOutput(node IAVAudioNode)

Disconnects all output MIDI connections from a node.

node: The node with the MIDI outputs to disconnect.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/disconnectMIDIOutput(_:)

func (AVAudioEngine) DisconnectNodeInput 

func (a AVAudioEngine) DisconnectNodeInput(node IAVAudioNode)

Removes all input connections of the node.

node: The audio node with the inputs you want to disconnect.

Discussion

Connections break on each of the audio node’s input buses.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/disconnectNodeInput(_:)

func (AVAudioEngine) DisconnectNodeInputBus 

func (a AVAudioEngine) DisconnectNodeInputBus(node IAVAudioNode, bus AVAudioNodeBus)

Removes the input connection of a node on the specified bus.

node: The audio node with the input to disconnect.

bus: The destination’s input bus to disconnect.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/disconnectNodeInput(_:bus:)

func (AVAudioEngine) DisconnectNodeOutput 

func (a AVAudioEngine) DisconnectNodeOutput(node IAVAudioNode)

Removes all output connections of a node.

node: The audio node with the outputs to disconnect.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/disconnectNodeOutput(_:)

func (AVAudioEngine) DisconnectNodeOutputBus 

func (a AVAudioEngine) DisconnectNodeOutputBus(node IAVAudioNode, bus AVAudioNodeBus)

Removes the output connection of a node on the specified bus.

node: The audio node with the output to disconnect.

bus: The destination’s output bus to disconnect.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/disconnectNodeOutput(_:bus:)

func (AVAudioEngine) EnableManualRenderingModeFormatMaximumFrameCountError 

func (a AVAudioEngine) EnableManualRenderingModeFormatMaximumFrameCountError(mode AVAudioEngineManualRenderingMode, pcmFormat IAVAudioFormat, maximumFrameCount AVAudioFrameCount) (bool, error)

Sets the engine to operate in manual rendering mode with the render format and maximum frame count you specify.

mode: The manual rendering mode to use.

pcmFormat: The format of the output PCM audio data from the engine.

maximumFrameCount: The maximum number of PCM sample frames the engine produces in a single render call.

Discussion

Use this method to configure the engine to render in response to requests from the client. You must stop the engine before calling this method. The render format must be a PCM format and match the format of the rendering buffer.

The source nodes can supply the input data in manual rendering mode. For more information, see AVAudioPlayerNode and AVAudioInputNode.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/enableManualRenderingMode(_:format:maximumFrameCount:)

func (AVAudioEngine) Init 

func (a AVAudioEngine) Init() AVAudioEngine

Init initializes the instance.

func (AVAudioEngine) InputConnectionPointForNodeInputBus 

func (a AVAudioEngine) InputConnectionPointForNodeInputBus(node IAVAudioNode, bus AVAudioNodeBus) IAVAudioConnectionPoint

Returns connection information about a node’s input bus.

node: The node with the input connection you’re querying.

bus: The node’s input bus for the connection you’re querying.

Return Value

An AVAudioConnectionPoint object with connection information on the node’s input bus.

Discussion

Connections are always one-to-one or one-to-many. This method returns `nil` if there’s no connection on the node’s specified input bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/inputConnectionPoint(for:inputBus:)

func (AVAudioEngine) InputNode 

func (a AVAudioEngine) InputNode() IAVAudioInputNode

The audio engine’s singleton input audio node.

Discussion

The framework performs audio input through an input node. The audio engine creates a singleton on demand when first accessing this variable. To receive input, connect another node from the output of the input node, or create a recording tap on it.

When the engine renders to and from an audio device, the AVAudioSession category and the availability of hardware determines whether an app performs input (for example, input hardware isn’t available in tvOS). Check the input node’s input format (specifically, the hardware format) for a nonzero sample rate and channel count to see if input is in an enabled state.

Trying to perform input through the input node when it isn’t available or in an enabled state causes the engine to throw an error (when possible) or an exception.

In manual rendering mode, the input node can synchronously supply data to the engine while it’s rendering. For more information, see [SetManualRenderingInputPCMFormatInputBlock].

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/inputNode

func (AVAudioEngine) IsInManualRenderingMode 

func (a AVAudioEngine) IsInManualRenderingMode() bool

A Boolean value that indicates whether the engine is operating in manual rendering mode.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/isInManualRenderingMode

func (AVAudioEngine) MainMixerNode 

func (a AVAudioEngine) MainMixerNode() IAVAudioMixerNode

The audio engine’s optional singleton main mixer node.

Discussion

The audio engine constructs a singleton main mixer and connects it to the [OutputNode] when first accessing this property. You can then connect additional audio nodes to the mixer.

If the client never sets the connection format between the `mainMixerNode` and the `outputNode`, the engine always updates the format to track the format of the `outputNode` on startup or restart, even after an AVAudioEngineConfigurationChangeNotification. Otherwise, it’s the client’s responsibility to update the connection format after an AVAudioEngineConfigurationChangeNotification.

By default, the mixer’s output format (sample rate and channel count) tracks the format of the output node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/mainMixerNode

func (AVAudioEngine) ManualRenderingBlock 

func (a AVAudioEngine) ManualRenderingBlock() AVAudioEngineManualRenderingBlock

The block that renders the engine when operating in manual rendering mode.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/manualRenderingBlock

func (AVAudioEngine) ManualRenderingFormat 

func (a AVAudioEngine) ManualRenderingFormat() IAVAudioFormat

The render format of the engine in manual rendering mode.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/manualRenderingFormat

func (AVAudioEngine) ManualRenderingMaximumFrameCount 

func (a AVAudioEngine) ManualRenderingMaximumFrameCount() AVAudioFrameCount

The maximum number of PCM sample frames the engine produces in any single render call in manual rendering mode.

Discussion

If you get this property when the engine isn’t in manual rendering mode, it returns zero.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/manualRenderingMaximumFrameCount

func (AVAudioEngine) ManualRenderingMode 

func (a AVAudioEngine) ManualRenderingMode() AVAudioEngineManualRenderingMode

The manual rendering mode configured on the engine.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/manualRenderingMode

func (AVAudioEngine) ManualRenderingSampleTime 

func (a AVAudioEngine) ManualRenderingSampleTime() AVAudioFramePosition

An indication of where the engine is on its render timeline in manual rendering mode.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/manualRenderingSampleTime

func (AVAudioEngine) MusicSequence 

func (a AVAudioEngine) MusicSequence() objectivec.IObject

The music sequence instance that you attach to the audio engine, if any.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/musicSequence

func (AVAudioEngine) OutputConnectionPointsForNodeOutputBus 

func (a AVAudioEngine) OutputConnectionPointsForNodeOutputBus(node IAVAudioNode, bus AVAudioNodeBus) []AVAudioConnectionPoint

Returns connection information about a node’s output bus.

node: The node with the output connections you’re querying.

bus: The node’s output bus for connections you’re querying.

Return Value

An array of AVAudioConnectionPoint objects with connection information on the node’s output bus.

Discussion

Connections are always one-to-one or one-to-many. This method returns an empty array if there are no connections on the node’s specified output bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/outputConnectionPoints(for:outputBus:)

func (AVAudioEngine) OutputNode 

func (a AVAudioEngine) OutputNode() IAVAudioOutputNode

The audio engine’s singleton output audio node.

Discussion

The framework performs audio output through an output node. The audio engine creates a singleton on demand when first accessing this variable. Connect another node to the input of the output node, or get a mixer using the [MainMixerNode] property.

When the engine renders to and from an audio device, the AVAudioSession category and the availability of hardware determines whether an app performs output. Check the output node’s output format (specifically, the hardware format) for a nonzero sample rate and channel count to see if output is in an enabled state.

Trying to perform output through the output node when it isn’t available or in an enabled state causes the engine to throw an error (when possible) or an exception.

In manual rendering mode, the output node’s format determines the render format of the engine. For more information about changing it, see [EnableManualRenderingModeFormatMaximumFrameCountError].

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/outputNode

func (AVAudioEngine) Pause 

func (a AVAudioEngine) Pause()

Pauses the audio engine.

Discussion

This method stops the audio engine and the audio hardware, but doesn’t deallocate the resources for the [Prepare] method. When your app doesn’t need to play audio, consider pausing or stopping the engine to minimize power consumption.

You resume the audio engine by invoking [StartAndReturnError].

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/pause()

func (AVAudioEngine) Prepare 

func (a AVAudioEngine) Prepare()

Prepares the audio engine for starting.

Discussion

This method preallocates many resources the audio engine requires to start. Use it to responsively start audio input or output.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/prepare()

func (AVAudioEngine) RenderOfflineToBufferError 

func (a AVAudioEngine) RenderOfflineToBufferError(numberOfFrames AVAudioFrameCount, buffer IAVAudioPCMBuffer) (AVAudioEngineManualRenderingStatus, error)

Makes a render call to the engine operating in the offline manual rendering mode.

numberOfFrames: The number of PCM sample frames to render.

buffer: The PCM buffer the engine must render the audio for.

Return Value

One of the status codes from AVAudioEngineManualRenderingStatus. Irrespective of the returned status code, on exit, the output buffer’s [FrameLength] indicates the number of PCM samples the engine renders.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/renderOffline(_:to:)

func (AVAudioEngine) Reset 

func (a AVAudioEngine) Reset()

Resets all audio nodes in the audio engine.

Discussion

This methods resets all audio nodes in the audio engine. For example, use it to silence reverb and delay tails.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/reset()

func (AVAudioEngine) Running 

func (a AVAudioEngine) Running() bool

A Boolean value that indicates whether the audio engine is running.

Discussion

The value is true if the audio engine is in a running state; otherwise, false.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/isRunning

func (AVAudioEngine) SetAutoShutdownEnabled 

func (a AVAudioEngine) SetAutoShutdownEnabled(value bool)

func (AVAudioEngine) SetMusicSequence 

func (a AVAudioEngine) SetMusicSequence(value objectivec.IObject)

func (AVAudioEngine) StartAndReturnError 

func (a AVAudioEngine) StartAndReturnError() (bool, error)

Starts the audio engine.

Discussion

This method calls the [Prepare] method if you don’t call it after invoking [Stop]. It then starts the audio hardware through the AVAudioInputNode and AVAudioOutputNode instances in the audio engine. This method throws an error when:

- There’s a problem in the structure of the graph, such as the input can’t route to an output or to a recording tap through converter nodes. - An AVAudioSession error occurs. - The driver fails to start the hardware.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/start()

func (AVAudioEngine) Stop 

func (a AVAudioEngine) Stop()

Stops the audio engine and releases any previously prepared resources.

Discussion

This method stops the audio engine and the audio hardware, and releases any allocated resources for the [Prepare] method. When your app doesn’t need to play audio, consider pausing or stopping the engine to minimize power consumption.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine/stop()

type AVAudioEngineClass 

type AVAudioEngineClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioEngineClass 

func GetAVAudioEngineClass() AVAudioEngineClass

GetAVAudioEngineClass returns the class object for AVAudioEngine.

func (AVAudioEngineClass) Alloc 

func (ac AVAudioEngineClass) Alloc() AVAudioEngine

Alloc allocates memory for a new instance of the class.

func (AVAudioEngineClass) Class 

func (ac AVAudioEngineClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioEngineManualRenderingBlock 

type AVAudioEngineManualRenderingBlock = func(uint32, objectivec.IObject, *int) AVAudioEngineManualRenderingStatus

AVAudioEngineManualRenderingBlock is the type that represents a block that renders the engine when operating in manual rendering mode.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngineManualRenderingBlock

type AVAudioEngineManualRenderingError 

type AVAudioEngineManualRenderingError int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngineManualRenderingError 

const (
	// AVAudioEngineManualRenderingErrorInitialized: An operation that the system can’t perform because the engine is still running.
	AVAudioEngineManualRenderingErrorInitialized AVAudioEngineManualRenderingError = -80801
	// AVAudioEngineManualRenderingErrorInvalidMode: An operation the system can’t perform because the engine isn’t in manual rendering mode or the right variant of it.
	AVAudioEngineManualRenderingErrorInvalidMode AVAudioEngineManualRenderingError = -80800
	// AVAudioEngineManualRenderingErrorNotRunning: An operation the system can’t perform because the engine isn’t running.
	AVAudioEngineManualRenderingErrorNotRunning AVAudioEngineManualRenderingError = -80802
)

func (AVAudioEngineManualRenderingError) String 

func (e AVAudioEngineManualRenderingError) String() string

type AVAudioEngineManualRenderingMode 

type AVAudioEngineManualRenderingMode int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngineManualRenderingMode 

const (
	// AVAudioEngineManualRenderingModeOffline: An engine that operates in an offline mode.
	AVAudioEngineManualRenderingModeOffline AVAudioEngineManualRenderingMode = 0
	// AVAudioEngineManualRenderingModeRealtime: An engine that operates under real-time constraints and doesn’t make blocking calls while rendering.
	AVAudioEngineManualRenderingModeRealtime AVAudioEngineManualRenderingMode = 1
)

func (AVAudioEngineManualRenderingMode) String 

func (e AVAudioEngineManualRenderingMode) String() string

type AVAudioEngineManualRenderingStatus 

type AVAudioEngineManualRenderingStatus int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngineManualRenderingStatus 

const (
	// AVAudioEngineManualRenderingStatusCannotDoInCurrentContext: An operation that the system can’t perform under the current conditions.
	AVAudioEngineManualRenderingStatusCannotDoInCurrentContext AVAudioEngineManualRenderingStatus = 2
	// AVAudioEngineManualRenderingStatusError: A problem that occurs during rendering and results in no data returning.
	AVAudioEngineManualRenderingStatusError AVAudioEngineManualRenderingStatus = -1
	// AVAudioEngineManualRenderingStatusInsufficientDataFromInputNode: A condition that occurs when the input node doesn’t return enough input data to satisfy the render request at the time of the request.
	AVAudioEngineManualRenderingStatusInsufficientDataFromInputNode AVAudioEngineManualRenderingStatus = 1
	// AVAudioEngineManualRenderingStatusSuccess: A status that indicates the successful return of the requested data.
	AVAudioEngineManualRenderingStatusSuccess AVAudioEngineManualRenderingStatus = 0
)

func (AVAudioEngineManualRenderingStatus) String 

func (e AVAudioEngineManualRenderingStatus) String() string

type AVAudioEnvironmentDistanceAttenuationModel 

type AVAudioEnvironmentDistanceAttenuationModel int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentDistanceAttenuationModel 

const (
	// AVAudioEnvironmentDistanceAttenuationModelExponential: An exponential model that describes the drop-off in gain as the source moves away from the listener.
	AVAudioEnvironmentDistanceAttenuationModelExponential AVAudioEnvironmentDistanceAttenuationModel = 1
	// AVAudioEnvironmentDistanceAttenuationModelInverse: An inverse model that describes the drop-off in gain as the source moves away from the listener.
	AVAudioEnvironmentDistanceAttenuationModelInverse AVAudioEnvironmentDistanceAttenuationModel = 2
	// AVAudioEnvironmentDistanceAttenuationModelLinear: A linear model that describes the drop-off in gain as the source moves away from the listener.
	AVAudioEnvironmentDistanceAttenuationModelLinear AVAudioEnvironmentDistanceAttenuationModel = 3
)

func (AVAudioEnvironmentDistanceAttenuationModel) String 

func (e AVAudioEnvironmentDistanceAttenuationModel) String() string

type AVAudioEnvironmentDistanceAttenuationParameters 

type AVAudioEnvironmentDistanceAttenuationParameters struct {
	objectivec.Object
}

An object that specifies the amount of attenuation distance, the gradual loss in audio intensity, and other characteristics.

Overview

Getting and Setting the Attenuation Model

Getting and Setting the Attenuation Values

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentDistanceAttenuationParameters

func AVAudioEnvironmentDistanceAttenuationParametersFromID 

func AVAudioEnvironmentDistanceAttenuationParametersFromID(id objc.ID) AVAudioEnvironmentDistanceAttenuationParameters

AVAudioEnvironmentDistanceAttenuationParametersFromID constructs a AVAudioEnvironmentDistanceAttenuationParameters from an objc.ID.

An object that specifies the amount of attenuation distance, the gradual loss in audio intensity, and other characteristics.

func NewAVAudioEnvironmentDistanceAttenuationParameters 

func NewAVAudioEnvironmentDistanceAttenuationParameters() AVAudioEnvironmentDistanceAttenuationParameters

NewAVAudioEnvironmentDistanceAttenuationParameters creates a new AVAudioEnvironmentDistanceAttenuationParameters instance.

func (AVAudioEnvironmentDistanceAttenuationParameters) Autorelease 

func (a AVAudioEnvironmentDistanceAttenuationParameters) Autorelease() AVAudioEnvironmentDistanceAttenuationParameters

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioEnvironmentDistanceAttenuationParameters) DistanceAttenuationModel 

func (a AVAudioEnvironmentDistanceAttenuationParameters) DistanceAttenuationModel() AVAudioEnvironmentDistanceAttenuationModel

The distance attenuation model that describes the drop-off in gain as the source moves away from the listener.

Discussion

The default value is the AVAudioEnvironmentDistanceAttenuationModelInverse attenuation model.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentDistanceAttenuationParameters/distanceAttenuationModel

func (AVAudioEnvironmentDistanceAttenuationParameters) Init 

func (a AVAudioEnvironmentDistanceAttenuationParameters) Init() AVAudioEnvironmentDistanceAttenuationParameters

Init initializes the instance.

func (AVAudioEnvironmentDistanceAttenuationParameters) MaximumDistance 

func (a AVAudioEnvironmentDistanceAttenuationParameters) MaximumDistance() float32

The distance beyond which the node applies no further attenuation, in meters.

Discussion

The default value is `100000.0` meters.

This property is relevant for AVAudioEnvironmentDistanceAttenuationModelInverse.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentDistanceAttenuationParameters/maximumDistance

func (AVAudioEnvironmentDistanceAttenuationParameters) ReferenceDistance 

func (a AVAudioEnvironmentDistanceAttenuationParameters) ReferenceDistance() float32

The minimum distance at which the node applies attenuation, in meters.

Discussion

The default value is `1.0` meter.

This property is relevant for AVAudioEnvironmentDistanceAttenuationModelInverse and AVAudioEnvironmentDistanceAttenuationModelLinear.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentDistanceAttenuationParameters/referenceDistance

func (AVAudioEnvironmentDistanceAttenuationParameters) RolloffFactor 

func (a AVAudioEnvironmentDistanceAttenuationParameters) RolloffFactor() float32

A factor that determines the attenuation curve.

Discussion

A higher value results in a steeper attenuation curve. The default value is `1.0`, and the value must be greater than `0.0`.

This property is relevant for AVAudioEnvironmentDistanceAttenuationModelExponential, AVAudioEnvironmentDistanceAttenuationModelInverse, and AVAudioEnvironmentDistanceAttenuationModelLinear.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentDistanceAttenuationParameters/rolloffFactor

func (AVAudioEnvironmentDistanceAttenuationParameters) SetDistanceAttenuationModel 

func (a AVAudioEnvironmentDistanceAttenuationParameters) SetDistanceAttenuationModel(value AVAudioEnvironmentDistanceAttenuationModel)

func (AVAudioEnvironmentDistanceAttenuationParameters) SetMaximumDistance 

func (a AVAudioEnvironmentDistanceAttenuationParameters) SetMaximumDistance(value float32)

func (AVAudioEnvironmentDistanceAttenuationParameters) SetReferenceDistance 

func (a AVAudioEnvironmentDistanceAttenuationParameters) SetReferenceDistance(value float32)

func (AVAudioEnvironmentDistanceAttenuationParameters) SetRolloffFactor 

func (a AVAudioEnvironmentDistanceAttenuationParameters) SetRolloffFactor(value float32)

type AVAudioEnvironmentDistanceAttenuationParametersClass 

type AVAudioEnvironmentDistanceAttenuationParametersClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioEnvironmentDistanceAttenuationParametersClass 

func GetAVAudioEnvironmentDistanceAttenuationParametersClass() AVAudioEnvironmentDistanceAttenuationParametersClass

GetAVAudioEnvironmentDistanceAttenuationParametersClass returns the class object for AVAudioEnvironmentDistanceAttenuationParameters.

func (AVAudioEnvironmentDistanceAttenuationParametersClass) Alloc 

func (ac AVAudioEnvironmentDistanceAttenuationParametersClass) Alloc() AVAudioEnvironmentDistanceAttenuationParameters

Alloc allocates memory for a new instance of the class.

func (AVAudioEnvironmentDistanceAttenuationParametersClass) Class 

func (ac AVAudioEnvironmentDistanceAttenuationParametersClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioEnvironmentNode 

type AVAudioEnvironmentNode struct {
	AVAudioNode
}

An object that simulates a 3D audio environment.

Overview

The AVAudioEnvironmentNode class is a mixer node that simulates a 3D audio environment. Any node that conforms to AVAudioMixing can act as a source node, such as AVAudioPlayerNode.

The environment node has an implicit listener. You set the listener’s position and orientation, and the system then controls the way the user experiences the virtual world.

To help characterize the environment, this class defines properties for distance attenuation and reverberation.

AVAudio3DMixingSourceMode affects how inputs with different channel configurations render. Spatialization applies only to inputs with a mono channel connection format. This class doesn’t spatialize stereo inputs or support inputs with connection formats of more than two channels.

To set the node’s output to a multichannel format, use an AVAudioFormat that has one of the following Audio Channel Layout Tags:

- [KAudioChannelLayoutTag_AudioUnit_4] - [KAudioChannelLayoutTag_AudioUnit_5_0] - [KAudioChannelLayoutTag_AudioUnit_6_0] - [KAudioChannelLayoutTag_AudioUnit_7_0] - [KAudioChannelLayoutTag_AudioUnit_7_0_Front] - [KAudioChannelLayoutTag_AudioUnit_8]

Getting and Setting Positional Properties

Getting Attenuation and Reverb Properties

Getting and Setting Environment Properties

Getting the Available Rendering Algorithms

Getting the Head Tracking Status

Getting the Input Bus

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode

func AVAudioEnvironmentNodeFromID 

func AVAudioEnvironmentNodeFromID(id objc.ID) AVAudioEnvironmentNode

AVAudioEnvironmentNodeFromID constructs a AVAudioEnvironmentNode from an objc.ID.

An object that simulates a 3D audio environment.

func NewAVAudioEnvironmentNode 

func NewAVAudioEnvironmentNode() AVAudioEnvironmentNode

NewAVAudioEnvironmentNode creates a new AVAudioEnvironmentNode instance.

func (AVAudioEnvironmentNode) ApplicableRenderingAlgorithms 

func (a AVAudioEnvironmentNode) ApplicableRenderingAlgorithms() []foundation.NSNumber

An array of rendering algorithms applicable to the environment node.

Discussion

The AVAudioEnvironmentNode class supports several rendering algorithms for each input bus as AVAudio3DMixingRenderingAlgorithm defines.

Depending on the current output format of the environment node, this method returns an immutable array of the applicable rendering algorithms. This subset of applicable rendering algorithms is important when you configure the environment node to a multichannel output format because only a subset of the algorithms render to all of the channels.

Retrieve the applicable algorithms after a successful connection to the destination node through one of the AVAudioEngine connect methods.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode/applicableRenderingAlgorithms

func (AVAudioEnvironmentNode) Autorelease 

func (a AVAudioEnvironmentNode) Autorelease() AVAudioEnvironmentNode

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioEnvironmentNode) DestinationForMixerBus 

func (a AVAudioEnvironmentNode) DestinationForMixerBus(mixer IAVAudioNode, bus AVAudioNodeBus) IAVAudioMixingDestination

Gets the audio mixing destination object that corresponds to the specified mixer node and input bus.

mixer: The mixer to get destination details for.

bus: The input bus.

Return Value

Returns `self` if the specified mixer or input bus matches its connection point. If the mixer or input bus doesn’t match its connection point, or if the source node isn’t in a connected state to the mixer or input bus, the method returns `nil.`

Discussion

When you connect a source node to multiple mixers downstream, setting AVAudioMixing properties directly on the source node applies the change to all of them. Use this method to get the corresponding AVAudioMixingDestination for a specific mixer. Properties set on individual destination instances don’t reflect at the source node level.

If there’s any disconnection between the source and mixer nodes, the return value can be invalid. Fetch the return value every time you want to set or get properties on a specific mixer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/destination(forMixer:bus:)

func (AVAudioEnvironmentNode) DistanceAttenuationParameters 

func (a AVAudioEnvironmentNode) DistanceAttenuationParameters() IAVAudioEnvironmentDistanceAttenuationParameters

The distance attenuation parameters for the environment.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode/distanceAttenuationParameters

func (AVAudioEnvironmentNode) Init 

func (a AVAudioEnvironmentNode) Init() AVAudioEnvironmentNode

Init initializes the instance.

func (AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_4 

func (a AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_4() objectivec.IObject

A quadraphonic symmetrical layout, recommended for use by audio units.

See: https://developer.apple.com/documentation/CoreAudioTypes/kAudioChannelLayoutTag_AudioUnit_4

func (AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_5_0 

func (a AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_5_0() objectivec.IObject

A 5-channel surround-based layout, recommended for use by audio units.

See: https://developer.apple.com/documentation/CoreAudioTypes/kAudioChannelLayoutTag_AudioUnit_5_0

func (AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_6_0 

func (a AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_6_0() objectivec.IObject

A 6-channel surround-based layout, recommended for use by audio units.

See: https://developer.apple.com/documentation/CoreAudioTypes/kAudioChannelLayoutTag_AudioUnit_6_0

func (AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_7_0 

func (a AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_7_0() objectivec.IObject

A 7-channel surround-based layout, recommended for use by audio units.

See: https://developer.apple.com/documentation/CoreAudioTypes/kAudioChannelLayoutTag_AudioUnit_7_0

func (AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_7_0_Front 

func (a AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_7_0_Front() objectivec.IObject

An alternate 7-channel surround-based layout, for use by audio units.

See: https://developer.apple.com/documentation/CoreAudioTypes/kAudioChannelLayoutTag_AudioUnit_7_0_Front

func (AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_8 

func (a AVAudioEnvironmentNode) KAudioChannelLayoutTag_AudioUnit_8() objectivec.IObject

An octagonal symmetrical layout, recommended for use by audio units.

See: https://developer.apple.com/documentation/CoreAudioTypes/kAudioChannelLayoutTag_AudioUnit_8

func (AVAudioEnvironmentNode) ListenerAngularOrientation 

func (a AVAudioEnvironmentNode) ListenerAngularOrientation() AVAudio3DAngularOrientation

The listener’s angular orientation in the environment.

Discussion

The system specifies all angles in degrees.

The default orientation is with the listener looking directly along the negative z-axis (forward). This orientation has a yaw of `0.0` degrees, a pitch of `0.0` degrees, and a roll of `0.0` degrees.

Changing this property results in a corresponding change in the [ListenerVectorOrientation] property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode/listenerAngularOrientation

func (AVAudioEnvironmentNode) ListenerHeadTrackingEnabled 

func (a AVAudioEnvironmentNode) ListenerHeadTrackingEnabled() bool

A Boolean value that indicates whether the listener orientation is automatically rotated based on head orientation.

Discussion

To enable head tracking, your app must have the com.apple.developer.coremotion.head-pose entitlement.

Set this value to true to enable head tracking with compatible AirPods.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode/isListenerHeadTrackingEnabled

func (AVAudioEnvironmentNode) ListenerPosition 

func (a AVAudioEnvironmentNode) ListenerPosition() AVAudio3DPoint

The listener’s position in the 3D environment.

Discussion

The system specifies the coordinates in meters.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode/listenerPosition

func (AVAudioEnvironmentNode) ListenerVectorOrientation 

func (a AVAudioEnvironmentNode) ListenerVectorOrientation() AVAudio3DVectorOrientation

The listener’s vector orientation in the environment.

Discussion

The default orientation is with the listener looking directly along the negative z-axis (forward).

The node expresses a forward vector orientation as `(0, 0, -1)`, and an up vector as `(0, 1, 0)`.

Changing this property results in a corresponding change in the [ListenerAngularOrientation] property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode/listenerVectorOrientation

func (AVAudioEnvironmentNode) NextAvailableInputBus 

func (a AVAudioEnvironmentNode) NextAvailableInputBus() AVAudioNodeBus

An unused input bus.

Discussion

This method finds and returns the first input bus that doesn’t have a connection with a node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode/nextAvailableInputBus

func (AVAudioEnvironmentNode) Obstruction 

func (a AVAudioEnvironmentNode) Obstruction() float32

A value that simulates filtering of the direct path of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks only the direct path of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudioEnvironmentNode) Occlusion 

func (a AVAudioEnvironmentNode) Occlusion() float32

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks the direct and reverb paths of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudioEnvironmentNode) OutputType 

func (a AVAudioEnvironmentNode) OutputType() AVAudioEnvironmentOutputType

The type of output hardware.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode/outputType

func (AVAudioEnvironmentNode) OutputVolume 

func (a AVAudioEnvironmentNode) OutputVolume() float32

The mixer’s output volume.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode/outputVolume

func (AVAudioEnvironmentNode) Pan 

func (a AVAudioEnvironmentNode) Pan() float32

The bus’s stereo pan.

Discussion

The default value is `0.0`, and the range of valid values is `-1.0` to `1.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioEnvironmentNode) PointSourceInHeadMode 

func (a AVAudioEnvironmentNode) PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudioEnvironmentNode) Position 

func (a AVAudioEnvironmentNode) Position() AVAudio3DPoint

The location of the source in the 3D environment.

Discussion

The system specifies the coordinates in meters. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudioEnvironmentNode) Rate 

func (a AVAudioEnvironmentNode) Rate() float32

A value that changes the playback rate of the input signal.

Discussion

A value of `2.0` results in the output audio playing one octave higher. A value of `0.5` results in the output audio playing one octave lower.

The default value is `1.0`, and the range of valid values is `0.5` to `2.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudioEnvironmentNode) RenderingAlgorithm 

func (a AVAudioEnvironmentNode) RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

The type of rendering algorithm the mixer uses.

Discussion

Depending on the current output format of the AVAudioEnvironmentNode instance, the system may only support a subset of the rendering algorithms. You can retrieve an array of valid rendering algorithms by calling the [ApplicableRenderingAlgorithms] function of the AVAudioEnvironmentNode instance.

The default rendering algorithm is AVAudio3DMixingRenderingAlgorithmEqualPowerPanning. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudioEnvironmentNode) ReverbBlend 

func (a AVAudioEnvironmentNode) ReverbBlend() float32

A value that controls the blend of dry and reverb processed audio.

Discussion

This property controls the amount of the source’s audio that the AVAudioEnvironmentNode instance processes. A value of `0.5` results in an equal blend of dry and processed (wet) audio.

The default is `0.0`, and the range of valid values is `0.0` (completely dry) to `1.0` (completely wet). Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudioEnvironmentNode) ReverbParameters 

func (a AVAudioEnvironmentNode) ReverbParameters() IAVAudioEnvironmentReverbParameters

The reverb parameters for the environment.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode/reverbParameters

func (AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_4 

func (a AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_4(value objectivec.IObject)

func (AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_5_0 

func (a AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_5_0(value objectivec.IObject)

func (AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_6_0 

func (a AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_6_0(value objectivec.IObject)

func (AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_7_0 

func (a AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_7_0(value objectivec.IObject)

func (AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_7_0_Front 

func (a AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_7_0_Front(value objectivec.IObject)

func (AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_8 

func (a AVAudioEnvironmentNode) SetKAudioChannelLayoutTag_AudioUnit_8(value objectivec.IObject)

func (AVAudioEnvironmentNode) SetListenerAngularOrientation 

func (a AVAudioEnvironmentNode) SetListenerAngularOrientation(value AVAudio3DAngularOrientation)

func (AVAudioEnvironmentNode) SetListenerHeadTrackingEnabled 

func (a AVAudioEnvironmentNode) SetListenerHeadTrackingEnabled(value bool)

func (AVAudioEnvironmentNode) SetListenerPosition 

func (a AVAudioEnvironmentNode) SetListenerPosition(value AVAudio3DPoint)

func (AVAudioEnvironmentNode) SetListenerVectorOrientation 

func (a AVAudioEnvironmentNode) SetListenerVectorOrientation(value AVAudio3DVectorOrientation)

func (AVAudioEnvironmentNode) SetObstruction 

func (a AVAudioEnvironmentNode) SetObstruction(value float32)

func (AVAudioEnvironmentNode) SetOcclusion 

func (a AVAudioEnvironmentNode) SetOcclusion(value float32)

func (AVAudioEnvironmentNode) SetOutputType 

func (a AVAudioEnvironmentNode) SetOutputType(value AVAudioEnvironmentOutputType)

func (AVAudioEnvironmentNode) SetOutputVolume 

func (a AVAudioEnvironmentNode) SetOutputVolume(value float32)

func (AVAudioEnvironmentNode) SetPan 

func (a AVAudioEnvironmentNode) SetPan(value float32)

func (AVAudioEnvironmentNode) SetPointSourceInHeadMode 

func (a AVAudioEnvironmentNode) SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

func (AVAudioEnvironmentNode) SetPosition 

func (a AVAudioEnvironmentNode) SetPosition(value AVAudio3DPoint)

func (AVAudioEnvironmentNode) SetRate 

func (a AVAudioEnvironmentNode) SetRate(value float32)

func (AVAudioEnvironmentNode) SetRenderingAlgorithm 

func (a AVAudioEnvironmentNode) SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)

func (AVAudioEnvironmentNode) SetReverbBlend 

func (a AVAudioEnvironmentNode) SetReverbBlend(value float32)

func (AVAudioEnvironmentNode) SetSourceMode 

func (a AVAudioEnvironmentNode) SetSourceMode(value AVAudio3DMixingSourceMode)

func (AVAudioEnvironmentNode) SetVolume 

func (a AVAudioEnvironmentNode) SetVolume(value float32)

func (AVAudioEnvironmentNode) SourceMode 

func (a AVAudioEnvironmentNode) SourceMode() AVAudio3DMixingSourceMode

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudioEnvironmentNode) Volume 

func (a AVAudioEnvironmentNode) Volume() float32

The bus’s input volume.

Discussion

The default value is `1.0`, and the range of valid values is `0.0` to `1.0`. Only the AVAudioEnvironmentNode and the AVAudioMixerNode implement this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume

type AVAudioEnvironmentNodeClass 

type AVAudioEnvironmentNodeClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioEnvironmentNodeClass 

func GetAVAudioEnvironmentNodeClass() AVAudioEnvironmentNodeClass

GetAVAudioEnvironmentNodeClass returns the class object for AVAudioEnvironmentNode.

func (AVAudioEnvironmentNodeClass) Alloc 

func (ac AVAudioEnvironmentNodeClass) Alloc() AVAudioEnvironmentNode

Alloc allocates memory for a new instance of the class.

func (AVAudioEnvironmentNodeClass) Class 

func (ac AVAudioEnvironmentNodeClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioEnvironmentOutputType 

type AVAudioEnvironmentOutputType int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentOutputType 

const (
	// AVAudioEnvironmentOutputTypeAuto: Automatically detects the playback route and picks the correct output.
	AVAudioEnvironmentOutputTypeAuto AVAudioEnvironmentOutputType = 0
	// AVAudioEnvironmentOutputTypeBuiltInSpeakers: Renders the audio output for built-in speakers on the current hardware.
	AVAudioEnvironmentOutputTypeBuiltInSpeakers AVAudioEnvironmentOutputType = 2
	// AVAudioEnvironmentOutputTypeExternalSpeakers: Renders the audio output for external speakers according to the audio environment node’s output channel layout.
	AVAudioEnvironmentOutputTypeExternalSpeakers AVAudioEnvironmentOutputType = 3
	// AVAudioEnvironmentOutputTypeHeadphones: Renders the audio output for headphones.
	AVAudioEnvironmentOutputTypeHeadphones AVAudioEnvironmentOutputType = 1
)

func (AVAudioEnvironmentOutputType) String 

func (e AVAudioEnvironmentOutputType) String() string

type AVAudioEnvironmentReverbParameters 

type AVAudioEnvironmentReverbParameters struct {
	objectivec.Object
}

A class that encapsulates the parameters that you use to control the reverb of the environment node class.

Overview

Use reverberation to simulate the acoustic characteristics of an environment. The AVAudioEnvironmentNode class has a built-in reverb that describe the space that the listener is in.

The reverb has a single filter that sits at the end of the chain. You use this filter to shape the overall sound of the reverb. For instance, select one of the reverb presets to simulate the general space, and then use the filter to brighten or darken the overall sound.

You can’t create a standalone instance of AVAudioEnvironmentReverbParameters. Only an instance vended by a source object is valid, such as an AVAudioEnvironmentNode instance.

Enabling and Disabling Reverb

Getting and Setting Reverb Values

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentReverbParameters

func AVAudioEnvironmentReverbParametersFromID 

func AVAudioEnvironmentReverbParametersFromID(id objc.ID) AVAudioEnvironmentReverbParameters

AVAudioEnvironmentReverbParametersFromID constructs a AVAudioEnvironmentReverbParameters from an objc.ID.

A class that encapsulates the parameters that you use to control the reverb of the environment node class.

func NewAVAudioEnvironmentReverbParameters 

func NewAVAudioEnvironmentReverbParameters() AVAudioEnvironmentReverbParameters

NewAVAudioEnvironmentReverbParameters creates a new AVAudioEnvironmentReverbParameters instance.

func (AVAudioEnvironmentReverbParameters) Autorelease 

func (a AVAudioEnvironmentReverbParameters) Autorelease() AVAudioEnvironmentReverbParameters

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioEnvironmentReverbParameters) Enable 

func (a AVAudioEnvironmentReverbParameters) Enable() bool

A Boolean value that indicates whether reverberation is in an enabled state.

Discussion

The default value is false.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentReverbParameters/enable

func (AVAudioEnvironmentReverbParameters) FilterParameters 

func (a AVAudioEnvironmentReverbParameters) FilterParameters() IAVAudioUnitEQFilterParameters

A filter that the system applies to the output.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentReverbParameters/filterParameters

func (AVAudioEnvironmentReverbParameters) Init 

func (a AVAudioEnvironmentReverbParameters) Init() AVAudioEnvironmentReverbParameters

Init initializes the instance.

func (AVAudioEnvironmentReverbParameters) Level 

func (a AVAudioEnvironmentReverbParameters) Level() float32

Controls the amount of reverb, in decibels.

Discussion

The default value is `0.0`. The values must be within the range of `-40` to `40` dB.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentReverbParameters/level

func (AVAudioEnvironmentReverbParameters) LoadFactoryReverbPreset 

func (a AVAudioEnvironmentReverbParameters) LoadFactoryReverbPreset(preset AVAudioUnitReverbPreset)

Loads one of the reverbs factory presets.

preset: A reverb preset to load.

Discussion

Loading a factory reverb preset changes the sound of the reverb. This is independent of the filter which follows the reverb in the signal chain.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentReverbParameters/loadFactoryReverbPreset(_:)

func (AVAudioEnvironmentReverbParameters) SetEnable 

func (a AVAudioEnvironmentReverbParameters) SetEnable(value bool)

func (AVAudioEnvironmentReverbParameters) SetLevel 

func (a AVAudioEnvironmentReverbParameters) SetLevel(value float32)

type AVAudioEnvironmentReverbParametersClass 

type AVAudioEnvironmentReverbParametersClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioEnvironmentReverbParametersClass 

func GetAVAudioEnvironmentReverbParametersClass() AVAudioEnvironmentReverbParametersClass

GetAVAudioEnvironmentReverbParametersClass returns the class object for AVAudioEnvironmentReverbParameters.

func (AVAudioEnvironmentReverbParametersClass) Alloc 

func (ac AVAudioEnvironmentReverbParametersClass) Alloc() AVAudioEnvironmentReverbParameters

Alloc allocates memory for a new instance of the class.

func (AVAudioEnvironmentReverbParametersClass) Class 

func (ac AVAudioEnvironmentReverbParametersClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioFile 

type AVAudioFile struct {
	objectivec.Object
}

An object that represents an audio file that the system can open for reading or writing.

Overview

Regardless of the file format, you read and write using AVAudioPCMBuffer objects. These objects contain samples as AVAudioCommonFormat that the framework refers to as the file’s processing format. You convert to and from using the file’s actual format.

Reads and writes are always sequential. Random access is possible by setting the AVAudioFile.FramePosition property.

Creating an Audio File

Reading and Writing the Audio Buffer

Getting Audio File Properties

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile

func AVAudioFileFromID 

func AVAudioFileFromID(id objc.ID) AVAudioFile

AVAudioFileFromID constructs a AVAudioFile from an objc.ID.

An object that represents an audio file that the system can open for reading or writing.

func NewAVAudioFile 

func NewAVAudioFile() AVAudioFile

NewAVAudioFile creates a new AVAudioFile instance.

func NewAudioFileForReadingCommonFormatInterleavedError 

func NewAudioFileForReadingCommonFormatInterleavedError(fileURL foundation.INSURL, format AVAudioCommonFormat, interleaved bool) (AVAudioFile, error)

Opens a file for reading using the specified processing format.

fileURL: The file to read.

format: The processing format to use when reading from the file.

interleaved: The Boolean value that indicates whether to use an interleaved processing format.

Return Value

A new AVAudioFile instance you use for reading.

Discussion

The processing format refers to the buffers it reads from the file. The system reads the content and converts from the file format to the processing format. The processing format must be at the same sample rate as the actual file contents, and must be linear PCM. The interleaved parameter determines whether the processing buffer is in an interleaved float format.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/init(forReading:commonFormat:interleaved:)

func NewAudioFileForReadingError 

func NewAudioFileForReadingError(fileURL foundation.INSURL) (AVAudioFile, error)

Opens a file for reading using the standard, deinterleaved floating point format.

fileURL: The file to read.

Return Value

A new AVAudioFile instance you use for reading.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/init(forReading:)

func NewAudioFileForWritingSettingsCommonFormatInterleavedError 

func NewAudioFileForWritingSettingsCommonFormatInterleavedError(fileURL foundation.INSURL, settings foundation.INSDictionary, format AVAudioCommonFormat, interleaved bool) (AVAudioFile, error)

Opens a file for writing using a specified processing format and settings.

fileURL: The path at which to create the file.

settings: The format of the file to create.

format: The processing format to use when writing to the file.

interleaved: The Boolean value that indicates whether to use an interleaved processing format.

Return Value

A new AVAudioFile instance for writing.

Discussion

This method infers the file type to create from the file extension of `fileURL`, and overwrites a file at the specified URL if a file exists.

For more information about the `settings` parameter, see the [Settings] property in the AVAudioRecorder class.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/init(forWriting:settings:commonFormat:interleaved:)

func NewAudioFileForWritingSettingsError 

func NewAudioFileForWritingSettingsError(fileURL foundation.INSURL, settings foundation.INSDictionary) (AVAudioFile, error)

Opens a file for writing using the specified settings.

fileURL: The path of the file to create for writing.

settings: The format of the file to create.

Return Value

A new AVAudioFile instance for writing.

Discussion

This method infers the file type to create from the file extension of `fileURL`, and overwrites a file at the specified URL if a file exists.

The file opens for writing using the standard format AVAudioPCMFormatFloat32. For more information about the `settings` parameter, see the [Settings] property in the AVAudioRecorder class.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/init(forWriting:settings:)

func (AVAudioFile) AVAudioFileTypeKey 

func (a AVAudioFile) AVAudioFileTypeKey() string

A string that indicates the audio file type.

See: https://developer.apple.com/documentation/avfaudio/avaudiofiletypekey

func (AVAudioFile) Autorelease 

func (a AVAudioFile) Autorelease() AVAudioFile

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioFile) Close 

func (a AVAudioFile) Close()

Closes the audio file.

Discussion

Calling this method closes the underlying file, if open. It’s normally unnecessary to close a file opened for reading because it’s automatically closed when released. It’s only necessary to close a file opened for writing in order to achieve specific control over when the file’s header is updated.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/close()

func (AVAudioFile) FileFormat 

func (a AVAudioFile) FileFormat() IAVAudioFormat

The on-disk format of the file.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/fileFormat

func (AVAudioFile) FramePosition 

func (a AVAudioFile) FramePosition() AVAudioFramePosition

The position in the file where the next read or write operation occurs.

Discussion

Set the `framePosition` property to perform a seek before a read or write. A read or write operation advances the frame position value by the number of frames it reads or writes.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/framePosition

func (AVAudioFile) Init 

func (a AVAudioFile) Init() AVAudioFile

Init initializes the instance.

func (AVAudioFile) InitForReadingCommonFormatInterleavedError 

func (a AVAudioFile) InitForReadingCommonFormatInterleavedError(fileURL foundation.INSURL, format AVAudioCommonFormat, interleaved bool) (AVAudioFile, error)

Opens a file for reading using the specified processing format.

fileURL: The file to read.

format: The processing format to use when reading from the file.

interleaved: The Boolean value that indicates whether to use an interleaved processing format.

Return Value

A new AVAudioFile instance you use for reading.

Discussion

The processing format refers to the buffers it reads from the file. The system reads the content and converts from the file format to the processing format. The processing format must be at the same sample rate as the actual file contents, and must be linear PCM. The interleaved parameter determines whether the processing buffer is in an interleaved float format.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/init(forReading:commonFormat:interleaved:)

func (AVAudioFile) InitForReadingError 

func (a AVAudioFile) InitForReadingError(fileURL foundation.INSURL) (AVAudioFile, error)

Opens a file for reading using the standard, deinterleaved floating point format.

fileURL: The file to read.

Return Value

A new AVAudioFile instance you use for reading.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/init(forReading:)

func (AVAudioFile) InitForWritingSettingsCommonFormatInterleavedError 

func (a AVAudioFile) InitForWritingSettingsCommonFormatInterleavedError(fileURL foundation.INSURL, settings foundation.INSDictionary, format AVAudioCommonFormat, interleaved bool) (AVAudioFile, error)

Opens a file for writing using a specified processing format and settings.

fileURL: The path at which to create the file.

settings: The format of the file to create.

format: The processing format to use when writing to the file.

interleaved: The Boolean value that indicates whether to use an interleaved processing format.

Return Value

A new AVAudioFile instance for writing.

Discussion

This method infers the file type to create from the file extension of `fileURL`, and overwrites a file at the specified URL if a file exists.

For more information about the `settings` parameter, see the [Settings] property in the AVAudioRecorder class.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/init(forWriting:settings:commonFormat:interleaved:)

func (AVAudioFile) InitForWritingSettingsError 

func (a AVAudioFile) InitForWritingSettingsError(fileURL foundation.INSURL, settings foundation.INSDictionary) (AVAudioFile, error)

Opens a file for writing using the specified settings.

fileURL: The path of the file to create for writing.

settings: The format of the file to create.

Return Value

A new AVAudioFile instance for writing.

Discussion

This method infers the file type to create from the file extension of `fileURL`, and overwrites a file at the specified URL if a file exists.

The file opens for writing using the standard format AVAudioPCMFormatFloat32. For more information about the `settings` parameter, see the [Settings] property in the AVAudioRecorder class.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/init(forWriting:settings:)

func (AVAudioFile) IsOpen 

func (a AVAudioFile) IsOpen() bool

A Boolean value that indicates whether the file is open.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/isOpen

func (AVAudioFile) Length 

func (a AVAudioFile) Length() AVAudioFramePosition

The number of sample frames in the file.

Discussion

This can be computationally expensive to compute for the first time.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/length

func (AVAudioFile) ProcessingFormat 

func (a AVAudioFile) ProcessingFormat() IAVAudioFormat

The processing format of the file.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/processingFormat

func (AVAudioFile) ReadIntoBufferError 

func (a AVAudioFile) ReadIntoBufferError(buffer IAVAudioPCMBuffer) (bool, error)

Reads an entire audio buffer.

buffer: The buffer from which to read the file. Its format must match the file’s processing format.

Discussion

When reading sequentially from the [FramePosition] property, the method attempts to fill the buffer to its capacity. On return, the buffer’s [Length] property indicates the number of sample frames it successfully reads.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/read(into:)

func (AVAudioFile) ReadIntoBufferFrameCountError 

func (a AVAudioFile) ReadIntoBufferFrameCountError(buffer IAVAudioPCMBuffer, frames AVAudioFrameCount) (bool, error)

Reads a portion of an audio buffer using the number of frames you specify.

buffer: The buffer from which to read the file. Its format must match the file’s processing format.

frames: The number of frames to read.

Discussion

You use this method to read fewer frames than the buffer’s `frameCapacity`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/read(into:frameCount:)

func (AVAudioFile) SetFramePosition 

func (a AVAudioFile) SetFramePosition(value AVAudioFramePosition)

func (AVAudioFile) Url 

func (a AVAudioFile) Url() foundation.INSURL

The location of the audio file.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/url

func (AVAudioFile) WriteFromBufferError 

func (a AVAudioFile) WriteFromBufferError(buffer IAVAudioPCMBuffer) (bool, error)

Writes an audio buffer sequentially.

buffer: The buffer from which to write to the file. Its format must match the file’s processing format.

Discussion

The buffer’s [FrameLength] signifies how much of the buffer the method writes.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile/write(from:)

type AVAudioFileClass 

type AVAudioFileClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioFileClass 

func GetAVAudioFileClass() AVAudioFileClass

GetAVAudioFileClass returns the class object for AVAudioFile.

func (AVAudioFileClass) Alloc 

func (ac AVAudioFileClass) Alloc() AVAudioFile

Alloc allocates memory for a new instance of the class.

func (AVAudioFileClass) Class 

func (ac AVAudioFileClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioFormat 

type AVAudioFormat struct {
	objectivec.Object
}

An object that describes the representation of an audio format.

Overview

The AVAudioFormat class wraps Core Audio’s AudioStreamBasicDescription, and includes convenience initializers and accessors for common formats, including Core Audio’s standard deinterleaved 32-bit floating point format.

Instances of this class are immutable.

Creating a New Audio Format Representation

Getting the Audio Stream Description

Getting Audio Format Values

Determining the Audio Format

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat

func AVAudioFormatFromID 

func AVAudioFormatFromID(id objc.ID) AVAudioFormat

AVAudioFormatFromID constructs a AVAudioFormat from an objc.ID.

An object that describes the representation of an audio format.

func NewAVAudioFormat 

func NewAVAudioFormat() AVAudioFormat

NewAVAudioFormat creates a new AVAudioFormat instance.

func NewAudioFormatStandardFormatWithSampleRateChannelLayout 

func NewAudioFormatStandardFormatWithSampleRateChannelLayout(sampleRate float64, layout IAVAudioChannelLayout) AVAudioFormat

Creates an audio format instance as a deinterleaved float with the specified sample rate and channel layout.

sampleRate: The sampling rate, in hertz.

layout: The channel layout, which must not be `nil`.

Return Value

A new AVAudioFormat instance.

Discussion

The returned AVAudioFormat instance uses the AVAudioPCMFormatFloat32 format.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(standardFormatWithSampleRate:channelLayout:)

func NewAudioFormatStandardFormatWithSampleRateChannels 

func NewAudioFormatStandardFormatWithSampleRateChannels(sampleRate float64, channels AVAudioChannelCount) AVAudioFormat

Creates an audio format instance with the specified sample rate and channel count.

sampleRate: The sampling rate, in hertz.

channels: The channel count.

Return Value

A new AVAudioFormat instance, or `nil` if the initialization fails.

Discussion

The returned AVAudioFormat instance uses the AVAudioPCMFormatFloat32 format.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(standardFormatWithSampleRate:channels:)

func NewAudioFormatWithCMAudioFormatDescription 

func NewAudioFormatWithCMAudioFormatDescription(formatDescription coremedia.CMFormatDescriptionRef) AVAudioFormat

Creates an audio format instance from a Core Media audio format description.

formatDescription: The Core Media audio format description.

Return Value

A new AVAudioFormat instance, or `nil` if `formatDescription` isn’t valid.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(cmAudioFormatDescription:)

func NewAudioFormatWithCommonFormatSampleRateChannelsInterleaved 

func NewAudioFormatWithCommonFormatSampleRateChannelsInterleaved(format AVAudioCommonFormat, sampleRate float64, channels AVAudioChannelCount, interleaved bool) AVAudioFormat

Creates an audio format instance.

format: The audio format.

sampleRate: The sampling rate, in hertz.

channels: The channel count.

interleaved: The Boolean value that indicates whether `format` is in an interleaved state.

Return Value

A new AVAudioFormat instance, or `nil` if the initialization fails.

Discussion

For information about possible `format` values, see AVAudioCommonFormat.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(commonFormat:sampleRate:channels:interleaved:)

func NewAudioFormatWithCommonFormatSampleRateInterleavedChannelLayout 

func NewAudioFormatWithCommonFormatSampleRateInterleavedChannelLayout(format AVAudioCommonFormat, sampleRate float64, interleaved bool, layout IAVAudioChannelLayout) AVAudioFormat

Creates an audio format instance with the specified audio format, sample rate, interleaved state, and channel layout.

format: The audio format.

sampleRate: The sampling rate, in hertz.

interleaved: The Boolean value that indicates whether `format` is in an interleaved state.

layout: The channel layout, which must not be `nil`.

Return Value

A new AVAudioFormat instance.

Discussion

For information about possible `format` values, see AVAudioCommonFormat.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(commonFormat:sampleRate:interleaved:channelLayout:)

func NewAudioFormatWithSettings 

func NewAudioFormatWithSettings(settings foundation.INSDictionary) AVAudioFormat

Creates an audio format instance using the specified settings dictionary.

settings: The settings dictionary.

Return Value

A new AVAudioFormat instance, or `nil` if the initialization fails.

Discussion

Note that many settings dictionary elements aren’t relevant for the format, so this method ignores them. For information about supported dictionary values, see Audio settings.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(settings:)

func NewAudioFormatWithStreamDescription 

func NewAudioFormatWithStreamDescription(asbd objectivec.IObject) AVAudioFormat

Creates an audio format instance from a stream description.

asbd: The audio stream description.

Return Value

A new AVAudioFormat instance, or `nil` if the initialization fails.

Discussion

If the AudioStreamBasicDescription specifies more than two channels, this method fails and returns `nil`. Instead, use the [InitWithStreamDescriptionChannelLayout] method.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(streamDescription:)

func NewAudioFormatWithStreamDescriptionChannelLayout 

func NewAudioFormatWithStreamDescriptionChannelLayout(asbd objectivec.IObject, layout IAVAudioChannelLayout) AVAudioFormat

Creates an audio format instance from a stream description and channel layout.

asbd: The audio stream description.

layout: The channel layout.

Return Value

A new AVAudioFormat instance, or `nil` if the initialization fails.

Discussion

When `layout` is `nil`, and `asbd` specifies one or two channels, this method assumes mono or stereo layout, respectively.

If the AudioStreamBasicDescription specifies more than two channels and `layout` is `nil`, this method fails and returns `nil`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(streamDescription:channelLayout:)

func (AVAudioFormat) AVChannelLayoutKey 

func (a AVAudioFormat) AVChannelLayoutKey() string

See: https://developer.apple.com/documentation/avfaudio/avchannellayoutkey

func (AVAudioFormat) Autorelease 

func (a AVAudioFormat) Autorelease() AVAudioFormat

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioFormat) ChannelCount 

func (a AVAudioFormat) ChannelCount() AVAudioChannelCount

The number of channels of audio data.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/channelCount

func (AVAudioFormat) ChannelLayout 

func (a AVAudioFormat) ChannelLayout() IAVAudioChannelLayout

The underlying audio channel layout.

Discussion

Only formats with more than two channels require channel layouts.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/channelLayout

func (AVAudioFormat) CommonFormat 

func (a AVAudioFormat) CommonFormat() AVAudioCommonFormat

The common format identifier instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/commonFormat

func (AVAudioFormat) EncodeWithCoder 

func (a AVAudioFormat) EncodeWithCoder(coder foundation.INSCoder)

func (AVAudioFormat) FormatDescription 

func (a AVAudioFormat) FormatDescription() coremedia.CMFormatDescriptionRef

The audio format description to use with Core Media APIs.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/formatDescription

func (AVAudioFormat) Init 

func (a AVAudioFormat) Init() AVAudioFormat

Init initializes the instance.

func (AVAudioFormat) InitStandardFormatWithSampleRateChannelLayout 

func (a AVAudioFormat) InitStandardFormatWithSampleRateChannelLayout(sampleRate float64, layout IAVAudioChannelLayout) AVAudioFormat

Creates an audio format instance as a deinterleaved float with the specified sample rate and channel layout.

sampleRate: The sampling rate, in hertz.

layout: The channel layout, which must not be `nil`.

Return Value

A new AVAudioFormat instance.

Discussion

The returned AVAudioFormat instance uses the AVAudioPCMFormatFloat32 format.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(standardFormatWithSampleRate:channelLayout:)

func (AVAudioFormat) InitStandardFormatWithSampleRateChannels 

func (a AVAudioFormat) InitStandardFormatWithSampleRateChannels(sampleRate float64, channels AVAudioChannelCount) AVAudioFormat

Creates an audio format instance with the specified sample rate and channel count.

sampleRate: The sampling rate, in hertz.

channels: The channel count.

Return Value

A new AVAudioFormat instance, or `nil` if the initialization fails.

Discussion

The returned AVAudioFormat instance uses the AVAudioPCMFormatFloat32 format.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(standardFormatWithSampleRate:channels:)

func (AVAudioFormat) InitWithCMAudioFormatDescription 

func (a AVAudioFormat) InitWithCMAudioFormatDescription(formatDescription coremedia.CMFormatDescriptionRef) AVAudioFormat

Creates an audio format instance from a Core Media audio format description.

formatDescription: The Core Media audio format description.

Return Value

A new AVAudioFormat instance, or `nil` if `formatDescription` isn’t valid.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(cmAudioFormatDescription:)

func (AVAudioFormat) InitWithCommonFormatSampleRateChannelsInterleaved 

func (a AVAudioFormat) InitWithCommonFormatSampleRateChannelsInterleaved(format AVAudioCommonFormat, sampleRate float64, channels AVAudioChannelCount, interleaved bool) AVAudioFormat

Creates an audio format instance.

format: The audio format.

sampleRate: The sampling rate, in hertz.

channels: The channel count.

interleaved: The Boolean value that indicates whether `format` is in an interleaved state.

Return Value

A new AVAudioFormat instance, or `nil` if the initialization fails.

Discussion

For information about possible `format` values, see AVAudioCommonFormat.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(commonFormat:sampleRate:channels:interleaved:)

func (AVAudioFormat) InitWithCommonFormatSampleRateInterleavedChannelLayout 

func (a AVAudioFormat) InitWithCommonFormatSampleRateInterleavedChannelLayout(format AVAudioCommonFormat, sampleRate float64, interleaved bool, layout IAVAudioChannelLayout) AVAudioFormat

Creates an audio format instance with the specified audio format, sample rate, interleaved state, and channel layout.

format: The audio format.

sampleRate: The sampling rate, in hertz.

interleaved: The Boolean value that indicates whether `format` is in an interleaved state.

layout: The channel layout, which must not be `nil`.

Return Value

A new AVAudioFormat instance.

Discussion

For information about possible `format` values, see AVAudioCommonFormat.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(commonFormat:sampleRate:interleaved:channelLayout:)

func (AVAudioFormat) InitWithSettings 

func (a AVAudioFormat) InitWithSettings(settings foundation.INSDictionary) AVAudioFormat

Creates an audio format instance using the specified settings dictionary.

settings: The settings dictionary.

Return Value

A new AVAudioFormat instance, or `nil` if the initialization fails.

Discussion

Note that many settings dictionary elements aren’t relevant for the format, so this method ignores them. For information about supported dictionary values, see Audio settings.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(settings:)

func (AVAudioFormat) InitWithStreamDescription 

func (a AVAudioFormat) InitWithStreamDescription(asbd objectivec.IObject) AVAudioFormat

Creates an audio format instance from a stream description.

asbd: The audio stream description.

Return Value

A new AVAudioFormat instance, or `nil` if the initialization fails.

Discussion

If the AudioStreamBasicDescription specifies more than two channels, this method fails and returns `nil`. Instead, use the [InitWithStreamDescriptionChannelLayout] method.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(streamDescription:)

func (AVAudioFormat) InitWithStreamDescriptionChannelLayout 

func (a AVAudioFormat) InitWithStreamDescriptionChannelLayout(asbd objectivec.IObject, layout IAVAudioChannelLayout) AVAudioFormat

Creates an audio format instance from a stream description and channel layout.

asbd: The audio stream description.

layout: The channel layout.

Return Value

A new AVAudioFormat instance, or `nil` if the initialization fails.

Discussion

When `layout` is `nil`, and `asbd` specifies one or two channels, this method assumes mono or stereo layout, respectively.

If the AudioStreamBasicDescription specifies more than two channels and `layout` is `nil`, this method fails and returns `nil`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/init(streamDescription:channelLayout:)

func (AVAudioFormat) Interleaved 

func (a AVAudioFormat) Interleaved() bool

A Boolean value that indicates whether the samples mix into one stream.

Discussion

This value is only valid for PCM formats.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/isInterleaved

func (AVAudioFormat) MagicCookie 

func (a AVAudioFormat) MagicCookie() foundation.INSData

An object that contains metadata that encoders and decoders require.

Discussion

Encoders produce a `magicCookie` object, and some decoders require it to decode properly.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/magicCookie

func (AVAudioFormat) SampleRate 

func (a AVAudioFormat) SampleRate() float64

The audio format sampling rate, in hertz.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/sampleRate

func (AVAudioFormat) SetMagicCookie 

func (a AVAudioFormat) SetMagicCookie(value foundation.INSData)

func (AVAudioFormat) Settings 

func (a AVAudioFormat) Settings() foundation.INSDictionary

A dictionary that represents the format as a dictionary using audio setting keys.

Discussion

The settings dictionary doesn’t support all formats that AudioStreamBasicDescription represents (the underlying implementation), in which case, this property returns `nil`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/settings

func (AVAudioFormat) Standard 

func (a AVAudioFormat) Standard() bool

A Boolean value that indicates whether the format is in a deinterleaved native-endian float state.

Discussion

This value returns true if the format is AVAudioPCMFormatFloat32; otherwise, false.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/isStandard

func (AVAudioFormat) StreamDescription 

func (a AVAudioFormat) StreamDescription() objectivec.IObject

The audio format properties of a stream of audio data.

Discussion

Returns an AudioStreamBasicDescription that you use with lower-level audio APIs.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat/streamDescription

type AVAudioFormatClass 

type AVAudioFormatClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioFormatClass 

func GetAVAudioFormatClass() AVAudioFormatClass

GetAVAudioFormatClass returns the class object for AVAudioFormat.

func (AVAudioFormatClass) Alloc 

func (ac AVAudioFormatClass) Alloc() AVAudioFormat

Alloc allocates memory for a new instance of the class.

func (AVAudioFormatClass) Class 

func (ac AVAudioFormatClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioFrameCount 

type AVAudioFrameCount = uint32

AVAudioFrameCount is a number of audio sample frames.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFrameCount

type AVAudioFramePosition 

type AVAudioFramePosition = int64

AVAudioFramePosition is a position in an audio file or stream.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFramePosition

type AVAudioIONode 

type AVAudioIONode struct {
	AVAudioNode
}

An object that performs audio input or output in the engine.

Overview

When rendering to and from an audio device in macOS, AVAudioInputNode and AVAudioOutputNode communicate with the system’s default input and output devices. In iOS, they communicate with the devices appropriate to the app’s AVAudioSession category, configurations, and user actions, such as connecting or disconnecting external devices.

In the manual rendering mode, AVAudioInputNode and AVAudioOutputNode perform the input and output in the engine in response to the client’s request.

Getting the Audio Unit

Getting the I/O Latency

Getting and Setting the Voice Processing State

See: https://developer.apple.com/documentation/AVFAudio/AVAudioIONode

func AVAudioIONodeFromID 

func AVAudioIONodeFromID(id objc.ID) AVAudioIONode

AVAudioIONodeFromID constructs a AVAudioIONode from an objc.ID.

An object that performs audio input or output in the engine.

func NewAVAudioIONode 

func NewAVAudioIONode() AVAudioIONode

NewAVAudioIONode creates a new AVAudioIONode instance.

func (AVAudioIONode) AudioUnit 

func (a AVAudioIONode) AudioUnit() IAVAudioUnit

The node’s underlying audio unit, if any.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioIONode/audioUnit

func (AVAudioIONode) Autorelease 

func (a AVAudioIONode) Autorelease() AVAudioIONode

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioIONode) Init 

func (a AVAudioIONode) Init() AVAudioIONode

Init initializes the instance.

func (AVAudioIONode) PresentationLatency 

func (a AVAudioIONode) PresentationLatency() float64

The presentation or hardware latency, applicable when rendering to or from an audio device.

Discussion

This corresponds to `kAudioDevicePropertyLatency` and `kAudioStreamPropertyLatency`. For more information, see `AudioHardwareBase.H()` in `CoreAudio.Framework`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioIONode/presentationLatency

func (AVAudioIONode) SetVoiceProcessingEnabledError 

func (a AVAudioIONode) SetVoiceProcessingEnabledError(enabled bool) (bool, error)

Enables or disables voice processing on the I/O node.

enabled: The Boolean value that indicates whether to enable voice processing.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioIONode/setVoiceProcessingEnabled(_:)

func (AVAudioIONode) VoiceProcessingEnabled 

func (a AVAudioIONode) VoiceProcessingEnabled() bool

A Boolean value that indicates whether voice processing is in an enabled state.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioIONode/isVoiceProcessingEnabled

type AVAudioIONodeClass 

type AVAudioIONodeClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioIONodeClass 

func GetAVAudioIONodeClass() AVAudioIONodeClass

GetAVAudioIONodeClass returns the class object for AVAudioIONode.

func (AVAudioIONodeClass) Alloc 

func (ac AVAudioIONodeClass) Alloc() AVAudioIONode

Alloc allocates memory for a new instance of the class.

func (AVAudioIONodeClass) Class 

func (ac AVAudioIONodeClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioIONodeInputBlock 

type AVAudioIONodeInputBlock = func(uint32) objectivec.IObject

AVAudioIONodeInputBlock is the type that represents a block to render operation calls to get input data when in manual rendering mode.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioIONodeInputBlock

type AVAudioInputNode 

type AVAudioInputNode struct {
	AVAudioIONode
}

An object that connects to the system’s audio input.

Overview

This node connects to the system’s audio input when rendering to or from an audio device. In manual rendering mode, this node supplies input data to the engine.

This audio node has one element. The format of the input scope reflects:

- The audio hardware sample rate and channel count when it connects to hardware. - The format of the PCM audio data that the node supplies to the engine in manual rendering mode. For more information, see AVAudioInputNode.SetManualRenderingInputPCMFormatInputBlock

When rendering from an audio device, the input node doesn’t support format conversion. In this case, the format of the output scope must be the same as the input and the formats for all nodes connected to the input chain.

In manual rendering mode, the format of the output scope is initially the same as the input, but you may set it to a different format, which converts the node.

Manually Giving Data to an Audio Engine

Getting and Setting Voice Processing Properties

Handling Muted Speech Events

See: https://developer.apple.com/documentation/AVFAudio/AVAudioInputNode

func AVAudioInputNodeFromID 

func AVAudioInputNodeFromID(id objc.ID) AVAudioInputNode

AVAudioInputNodeFromID constructs a AVAudioInputNode from an objc.ID.

An object that connects to the system’s audio input.

func NewAVAudioInputNode 

func NewAVAudioInputNode() AVAudioInputNode

NewAVAudioInputNode creates a new AVAudioInputNode instance.

func (AVAudioInputNode) Autorelease 

func (a AVAudioInputNode) Autorelease() AVAudioInputNode

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioInputNode) DestinationForMixerBus 

func (a AVAudioInputNode) DestinationForMixerBus(mixer IAVAudioNode, bus AVAudioNodeBus) IAVAudioMixingDestination

Gets the audio mixing destination object that corresponds to the specified mixer node and input bus.

mixer: The mixer to get destination details for.

bus: The input bus.

Return Value

Returns `self` if the specified mixer or input bus matches its connection point. If the mixer or input bus doesn’t match its connection point, or if the source node isn’t in a connected state to the mixer or input bus, the method returns `nil.`

Discussion

When you connect a source node to multiple mixers downstream, setting AVAudioMixing properties directly on the source node applies the change to all of them. Use this method to get the corresponding AVAudioMixingDestination for a specific mixer. Properties set on individual destination instances don’t reflect at the source node level.

If there’s any disconnection between the source and mixer nodes, the return value can be invalid. Fetch the return value every time you want to set or get properties on a specific mixer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/destination(forMixer:bus:)

func (AVAudioInputNode) Init 

func (a AVAudioInputNode) Init() AVAudioInputNode

Init initializes the instance.

func (AVAudioInputNode) Obstruction 

func (a AVAudioInputNode) Obstruction() float32

A value that simulates filtering of the direct path of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks only the direct path of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudioInputNode) Occlusion 

func (a AVAudioInputNode) Occlusion() float32

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks the direct and reverb paths of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudioInputNode) Pan 

func (a AVAudioInputNode) Pan() float32

The bus’s stereo pan.

Discussion

The default value is `0.0`, and the range of valid values is `-1.0` to `1.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioInputNode) PointSourceInHeadMode 

func (a AVAudioInputNode) PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudioInputNode) Position 

func (a AVAudioInputNode) Position() AVAudio3DPoint

The location of the source in the 3D environment.

Discussion

The system specifies the coordinates in meters. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudioInputNode) Rate 

func (a AVAudioInputNode) Rate() float32

A value that changes the playback rate of the input signal.

Discussion

A value of `2.0` results in the output audio playing one octave higher. A value of `0.5` results in the output audio playing one octave lower.

The default value is `1.0`, and the range of valid values is `0.5` to `2.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudioInputNode) RenderingAlgorithm 

func (a AVAudioInputNode) RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

The type of rendering algorithm the mixer uses.

Discussion

Depending on the current output format of the AVAudioEnvironmentNode instance, the system may only support a subset of the rendering algorithms. You can retrieve an array of valid rendering algorithms by calling the [ApplicableRenderingAlgorithms] function of the AVAudioEnvironmentNode instance.

The default rendering algorithm is AVAudio3DMixingRenderingAlgorithmEqualPowerPanning. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudioInputNode) ReverbBlend 

func (a AVAudioInputNode) ReverbBlend() float32

A value that controls the blend of dry and reverb processed audio.

Discussion

This property controls the amount of the source’s audio that the AVAudioEnvironmentNode instance processes. A value of `0.5` results in an equal blend of dry and processed (wet) audio.

The default is `0.0`, and the range of valid values is `0.0` (completely dry) to `1.0` (completely wet). Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudioInputNode) SetManualRenderingInputPCMFormatInputBlock 

func (a AVAudioInputNode) SetManualRenderingInputPCMFormatInputBlock(format IAVAudioFormat, block AVAudioIONodeInputBlock) bool

Supplies the data through the input node to the engine while operating in the manual rendering mode.

format: The format of the PCM audio data the block supplies to the engine.

block: The block the engine calls on the input node to get the audio to send to the output when operating in the manual rendering mode. For more information, see AVAudioIONodeInputBlock.

Discussion

The block must be non-`nil` when using an input node while the engine is operating in manual rendering mode. If you switch the engine to render to and from an audio device, it invalidates any previous block.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioInputNode/setManualRenderingInputPCMFormat(_:inputBlock:)

func (AVAudioInputNode) SetMutedSpeechActivityEventListener 

func (a AVAudioInputNode) SetMutedSpeechActivityEventListener(listenerBlock AVAudioVoiceProcessingSpeechActivityEventHandler) bool

See: https://developer.apple.com/documentation/AVFAudio/AVAudioInputNode/setMutedSpeechActivityEventListener(_:)

func (AVAudioInputNode) SetMutedSpeechActivityEventListenerSync 

func (a AVAudioInputNode) SetMutedSpeechActivityEventListenerSync(ctx context.Context) (AVAudioVoiceProcessingSpeechActivityEvent, error)

SetMutedSpeechActivityEventListenerSync is a synchronous wrapper around AVAudioInputNode.SetMutedSpeechActivityEventListener. It blocks until the completion handler fires or the context is cancelled.

func (AVAudioInputNode) SetObstruction 

func (a AVAudioInputNode) SetObstruction(value float32)

func (AVAudioInputNode) SetOcclusion 

func (a AVAudioInputNode) SetOcclusion(value float32)

func (AVAudioInputNode) SetPan 

func (a AVAudioInputNode) SetPan(value float32)

func (AVAudioInputNode) SetPointSourceInHeadMode 

func (a AVAudioInputNode) SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

func (AVAudioInputNode) SetPosition 

func (a AVAudioInputNode) SetPosition(value AVAudio3DPoint)

func (AVAudioInputNode) SetRate 

func (a AVAudioInputNode) SetRate(value float32)

func (AVAudioInputNode) SetRenderingAlgorithm 

func (a AVAudioInputNode) SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)

func (AVAudioInputNode) SetReverbBlend 

func (a AVAudioInputNode) SetReverbBlend(value float32)

func (AVAudioInputNode) SetSourceMode 

func (a AVAudioInputNode) SetSourceMode(value AVAudio3DMixingSourceMode)

func (AVAudioInputNode) SetVoiceProcessingAGCEnabled 

func (a AVAudioInputNode) SetVoiceProcessingAGCEnabled(value bool)

func (AVAudioInputNode) SetVoiceProcessingBypassed 

func (a AVAudioInputNode) SetVoiceProcessingBypassed(value bool)

func (AVAudioInputNode) SetVoiceProcessingInputMuted 

func (a AVAudioInputNode) SetVoiceProcessingInputMuted(value bool)

func (AVAudioInputNode) SetVoiceProcessingOtherAudioDuckingConfiguration 

func (a AVAudioInputNode) SetVoiceProcessingOtherAudioDuckingConfiguration(value AVAudioVoiceProcessingOtherAudioDuckingConfiguration)

func (AVAudioInputNode) SetVolume 

func (a AVAudioInputNode) SetVolume(value float32)

func (AVAudioInputNode) SourceMode 

func (a AVAudioInputNode) SourceMode() AVAudio3DMixingSourceMode

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudioInputNode) VoiceProcessingAGCEnabled 

func (a AVAudioInputNode) VoiceProcessingAGCEnabled() bool

A Boolean that indicates whether automatic gain control on the processed microphone uplink signal is active.

Discussion

This property is in an enabled state by default.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioInputNode/isVoiceProcessingAGCEnabled

func (AVAudioInputNode) VoiceProcessingBypassed 

func (a AVAudioInputNode) VoiceProcessingBypassed() bool

A Boolean that indicates whether the node bypasses all microphone uplink processing of the voice-processing unit.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioInputNode/isVoiceProcessingBypassed

func (AVAudioInputNode) VoiceProcessingInputMuted 

func (a AVAudioInputNode) VoiceProcessingInputMuted() bool

A Boolean that indicates whether the input of the voice processing unit is in a muted state.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioInputNode/isVoiceProcessingInputMuted

func (AVAudioInputNode) VoiceProcessingOtherAudioDuckingConfiguration 

func (a AVAudioInputNode) VoiceProcessingOtherAudioDuckingConfiguration() AVAudioVoiceProcessingOtherAudioDuckingConfiguration

The ducking configuration of nonvoice audio.

Discussion

Use this property to configures the ducking of nonvoice audio, including advanced enablement and ducking level. Typically, when playing other audio during voice chat, applying a higher level of ducking can increase the intelligibility of the voice chat.

If not set, the default behavior is to disable advanced ducking, with a ducking level set to AVAudioVoiceProcessingOtherAudioDuckingLevelDefault.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioInputNode/voiceProcessingOtherAudioDuckingConfiguration

func (AVAudioInputNode) Volume 

func (a AVAudioInputNode) Volume() float32

The bus’s input volume.

Discussion

The default value is `1.0`, and the range of valid values is `0.0` to `1.0`. Only the AVAudioEnvironmentNode and the AVAudioMixerNode implement this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume

type AVAudioInputNodeClass 

type AVAudioInputNodeClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioInputNodeClass 

func GetAVAudioInputNodeClass() AVAudioInputNodeClass

GetAVAudioInputNodeClass returns the class object for AVAudioInputNode.

func (AVAudioInputNodeClass) Alloc 

func (ac AVAudioInputNodeClass) Alloc() AVAudioInputNode

Alloc allocates memory for a new instance of the class.

func (AVAudioInputNodeClass) Class 

func (ac AVAudioInputNodeClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioMixerNode 

type AVAudioMixerNode struct {
	AVAudioNode
}

An object that takes any number of inputs and converts them into a single output.

Overview

The mixer accepts input at any sample rate and efficiently combines sample rate conversions. It also accepts any channel count and correctly upmixes or downmixes to the output channel count.

Getting and Setting the Mixer Volume

Getting an Input Bus

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixerNode

func AVAudioMixerNodeFromID 

func AVAudioMixerNodeFromID(id objc.ID) AVAudioMixerNode

AVAudioMixerNodeFromID constructs a AVAudioMixerNode from an objc.ID.

An object that takes any number of inputs and converts them into a single output.

func NewAVAudioMixerNode 

func NewAVAudioMixerNode() AVAudioMixerNode

NewAVAudioMixerNode creates a new AVAudioMixerNode instance.

func (AVAudioMixerNode) Autorelease 

func (a AVAudioMixerNode) Autorelease() AVAudioMixerNode

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioMixerNode) DestinationForMixerBus 

func (a AVAudioMixerNode) DestinationForMixerBus(mixer IAVAudioNode, bus AVAudioNodeBus) IAVAudioMixingDestination

Gets the audio mixing destination object that corresponds to the specified mixer node and input bus.

mixer: The mixer to get destination details for.

bus: The input bus.

Return Value

Returns `self` if the specified mixer or input bus matches its connection point. If the mixer or input bus doesn’t match its connection point, or if the source node isn’t in a connected state to the mixer or input bus, the method returns `nil.`

Discussion

When you connect a source node to multiple mixers downstream, setting AVAudioMixing properties directly on the source node applies the change to all of them. Use this method to get the corresponding AVAudioMixingDestination for a specific mixer. Properties set on individual destination instances don’t reflect at the source node level.

If there’s any disconnection between the source and mixer nodes, the return value can be invalid. Fetch the return value every time you want to set or get properties on a specific mixer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/destination(forMixer:bus:)

func (AVAudioMixerNode) Init 

func (a AVAudioMixerNode) Init() AVAudioMixerNode

Init initializes the instance.

func (AVAudioMixerNode) NextAvailableInputBus 

func (a AVAudioMixerNode) NextAvailableInputBus() AVAudioNodeBus

An audio bus that isn’t in a connected state.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixerNode/nextAvailableInputBus

func (AVAudioMixerNode) Obstruction 

func (a AVAudioMixerNode) Obstruction() float32

A value that simulates filtering of the direct path of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks only the direct path of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudioMixerNode) Occlusion 

func (a AVAudioMixerNode) Occlusion() float32

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks the direct and reverb paths of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudioMixerNode) OutputVolume 

func (a AVAudioMixerNode) OutputVolume() float32

The mixer’s output volume.

Discussion

The range of valid values is `0.0` to `1.0`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixerNode/outputVolume

func (AVAudioMixerNode) Pan 

func (a AVAudioMixerNode) Pan() float32

The bus’s stereo pan.

Discussion

The default value is `0.0`, and the range of valid values is `-1.0` to `1.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioMixerNode) PointSourceInHeadMode 

func (a AVAudioMixerNode) PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudioMixerNode) Position 

func (a AVAudioMixerNode) Position() AVAudio3DPoint

The location of the source in the 3D environment.

Discussion

The system specifies the coordinates in meters. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudioMixerNode) Rate 

func (a AVAudioMixerNode) Rate() float32

A value that changes the playback rate of the input signal.

Discussion

A value of `2.0` results in the output audio playing one octave higher. A value of `0.5` results in the output audio playing one octave lower.

The default value is `1.0`, and the range of valid values is `0.5` to `2.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudioMixerNode) RenderingAlgorithm 

func (a AVAudioMixerNode) RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

The type of rendering algorithm the mixer uses.

Discussion

Depending on the current output format of the AVAudioEnvironmentNode instance, the system may only support a subset of the rendering algorithms. You can retrieve an array of valid rendering algorithms by calling the [ApplicableRenderingAlgorithms] function of the AVAudioEnvironmentNode instance.

The default rendering algorithm is AVAudio3DMixingRenderingAlgorithmEqualPowerPanning. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudioMixerNode) ReverbBlend 

func (a AVAudioMixerNode) ReverbBlend() float32

A value that controls the blend of dry and reverb processed audio.

Discussion

This property controls the amount of the source’s audio that the AVAudioEnvironmentNode instance processes. A value of `0.5` results in an equal blend of dry and processed (wet) audio.

The default is `0.0`, and the range of valid values is `0.0` (completely dry) to `1.0` (completely wet). Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudioMixerNode) SetObstruction 

func (a AVAudioMixerNode) SetObstruction(value float32)

func (AVAudioMixerNode) SetOcclusion 

func (a AVAudioMixerNode) SetOcclusion(value float32)

func (AVAudioMixerNode) SetOutputVolume 

func (a AVAudioMixerNode) SetOutputVolume(value float32)

func (AVAudioMixerNode) SetPan 

func (a AVAudioMixerNode) SetPan(value float32)

func (AVAudioMixerNode) SetPointSourceInHeadMode 

func (a AVAudioMixerNode) SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

func (AVAudioMixerNode) SetPosition 

func (a AVAudioMixerNode) SetPosition(value AVAudio3DPoint)

func (AVAudioMixerNode) SetRate 

func (a AVAudioMixerNode) SetRate(value float32)

func (AVAudioMixerNode) SetRenderingAlgorithm 

func (a AVAudioMixerNode) SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)

func (AVAudioMixerNode) SetReverbBlend 

func (a AVAudioMixerNode) SetReverbBlend(value float32)

func (AVAudioMixerNode) SetSourceMode 

func (a AVAudioMixerNode) SetSourceMode(value AVAudio3DMixingSourceMode)

func (AVAudioMixerNode) SetVolume 

func (a AVAudioMixerNode) SetVolume(value float32)

func (AVAudioMixerNode) SourceMode 

func (a AVAudioMixerNode) SourceMode() AVAudio3DMixingSourceMode

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudioMixerNode) Volume 

func (a AVAudioMixerNode) Volume() float32

The bus’s input volume.

Discussion

The default value is `1.0`, and the range of valid values is `0.0` to `1.0`. Only the AVAudioEnvironmentNode and the AVAudioMixerNode implement this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume

type AVAudioMixerNodeClass 

type AVAudioMixerNodeClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioMixerNodeClass 

func GetAVAudioMixerNodeClass() AVAudioMixerNodeClass

GetAVAudioMixerNodeClass returns the class object for AVAudioMixerNode.

func (AVAudioMixerNodeClass) Alloc 

func (ac AVAudioMixerNodeClass) Alloc() AVAudioMixerNode

Alloc allocates memory for a new instance of the class.

func (AVAudioMixerNodeClass) Class 

func (ac AVAudioMixerNodeClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioMixing 

type AVAudioMixing interface {
	objectivec.IObject
	AVAudio3DMixing
	AVAudioStereoMixing

	// Gets the audio mixing destination object that corresponds to the specified mixer node and input bus.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/destination(forMixer:bus:)
	DestinationForMixerBus(mixer IAVAudioNode, bus AVAudioNodeBus) IAVAudioMixingDestination

	// The bus’s input volume.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume
	Volume() float32

	// The bus’s input volume.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume
	SetVolume(value float32)
}

A collection of properties that are applicable to the input bus of a mixer node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing

type AVAudioMixingDestination 

type AVAudioMixingDestination struct {
	objectivec.Object
}

An object that represents a connection to a mixer node from a node that conforms to the audio mixing protocol.

Overview

You can only use a destination instance when a source node provides it. You can’t use it as a standalone instance.

Getting Mixing Destination Properties

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixingDestination

func AVAudioMixingDestinationFromID 

func AVAudioMixingDestinationFromID(id objc.ID) AVAudioMixingDestination

AVAudioMixingDestinationFromID constructs a AVAudioMixingDestination from an objc.ID.

An object that represents a connection to a mixer node from a node that conforms to the audio mixing protocol.

func NewAVAudioMixingDestination 

func NewAVAudioMixingDestination() AVAudioMixingDestination

NewAVAudioMixingDestination creates a new AVAudioMixingDestination instance.

func (AVAudioMixingDestination) Autorelease 

func (a AVAudioMixingDestination) Autorelease() AVAudioMixingDestination

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioMixingDestination) ConnectionPoint 

func (a AVAudioMixingDestination) ConnectionPoint() IAVAudioConnectionPoint

The underlying mixer connection point.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixingDestination/connectionPoint

func (AVAudioMixingDestination) DestinationForMixerBus 

func (a AVAudioMixingDestination) DestinationForMixerBus(mixer IAVAudioNode, bus AVAudioNodeBus) IAVAudioMixingDestination

Gets the audio mixing destination object that corresponds to the specified mixer node and input bus.

mixer: The mixer to get destination details for.

bus: The input bus.

Return Value

Returns `self` if the specified mixer or input bus matches its connection point. If the mixer or input bus doesn’t match its connection point, or if the source node isn’t in a connected state to the mixer or input bus, the method returns `nil.`

Discussion

When you connect a source node to multiple mixers downstream, setting AVAudioMixing properties directly on the source node applies the change to all of them. Use this method to get the corresponding AVAudioMixingDestination for a specific mixer. Properties set on individual destination instances don’t reflect at the source node level.

If there’s any disconnection between the source and mixer nodes, the return value can be invalid. Fetch the return value every time you want to set or get properties on a specific mixer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/destination(forMixer:bus:)

func (AVAudioMixingDestination) Init 

func (a AVAudioMixingDestination) Init() AVAudioMixingDestination

Init initializes the instance.

func (AVAudioMixingDestination) Obstruction 

func (a AVAudioMixingDestination) Obstruction() float32

A value that simulates filtering of the direct path of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks only the direct path of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudioMixingDestination) Occlusion 

func (a AVAudioMixingDestination) Occlusion() float32

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks the direct and reverb paths of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudioMixingDestination) Pan 

func (a AVAudioMixingDestination) Pan() float32

The bus’s stereo pan.

Discussion

The default value is `0.0`, and the range of valid values is `-1.0` to `1.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioMixingDestination) PointSourceInHeadMode 

func (a AVAudioMixingDestination) PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudioMixingDestination) Position 

func (a AVAudioMixingDestination) Position() AVAudio3DPoint

The location of the source in the 3D environment.

Discussion

The system specifies the coordinates in meters. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudioMixingDestination) Rate 

func (a AVAudioMixingDestination) Rate() float32

A value that changes the playback rate of the input signal.

Discussion

A value of `2.0` results in the output audio playing one octave higher. A value of `0.5` results in the output audio playing one octave lower.

The default value is `1.0`, and the range of valid values is `0.5` to `2.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudioMixingDestination) RenderingAlgorithm 

func (a AVAudioMixingDestination) RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

The type of rendering algorithm the mixer uses.

Discussion

Depending on the current output format of the AVAudioEnvironmentNode instance, the system may only support a subset of the rendering algorithms. You can retrieve an array of valid rendering algorithms by calling the [ApplicableRenderingAlgorithms] function of the AVAudioEnvironmentNode instance.

The default rendering algorithm is AVAudio3DMixingRenderingAlgorithmEqualPowerPanning. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudioMixingDestination) ReverbBlend 

func (a AVAudioMixingDestination) ReverbBlend() float32

A value that controls the blend of dry and reverb processed audio.

Discussion

This property controls the amount of the source’s audio that the AVAudioEnvironmentNode instance processes. A value of `0.5` results in an equal blend of dry and processed (wet) audio.

The default is `0.0`, and the range of valid values is `0.0` (completely dry) to `1.0` (completely wet). Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudioMixingDestination) SetObstruction 

func (a AVAudioMixingDestination) SetObstruction(value float32)

func (AVAudioMixingDestination) SetOcclusion 

func (a AVAudioMixingDestination) SetOcclusion(value float32)

func (AVAudioMixingDestination) SetPan 

func (a AVAudioMixingDestination) SetPan(value float32)

func (AVAudioMixingDestination) SetPointSourceInHeadMode 

func (a AVAudioMixingDestination) SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

func (AVAudioMixingDestination) SetPosition 

func (a AVAudioMixingDestination) SetPosition(value AVAudio3DPoint)

func (AVAudioMixingDestination) SetRate 

func (a AVAudioMixingDestination) SetRate(value float32)

func (AVAudioMixingDestination) SetRenderingAlgorithm 

func (a AVAudioMixingDestination) SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)

func (AVAudioMixingDestination) SetReverbBlend 

func (a AVAudioMixingDestination) SetReverbBlend(value float32)

func (AVAudioMixingDestination) SetSourceMode 

func (a AVAudioMixingDestination) SetSourceMode(value AVAudio3DMixingSourceMode)

func (AVAudioMixingDestination) SetVolume 

func (a AVAudioMixingDestination) SetVolume(value float32)

func (AVAudioMixingDestination) SourceMode 

func (a AVAudioMixingDestination) SourceMode() AVAudio3DMixingSourceMode

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudioMixingDestination) Volume 

func (a AVAudioMixingDestination) Volume() float32

The bus’s input volume.

Discussion

The default value is `1.0`, and the range of valid values is `0.0` to `1.0`. Only the AVAudioEnvironmentNode and the AVAudioMixerNode implement this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume

type AVAudioMixingDestinationClass 

type AVAudioMixingDestinationClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioMixingDestinationClass 

func GetAVAudioMixingDestinationClass() AVAudioMixingDestinationClass

GetAVAudioMixingDestinationClass returns the class object for AVAudioMixingDestination.

func (AVAudioMixingDestinationClass) Alloc 

func (ac AVAudioMixingDestinationClass) Alloc() AVAudioMixingDestination

Alloc allocates memory for a new instance of the class.

func (AVAudioMixingDestinationClass) Class 

func (ac AVAudioMixingDestinationClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioMixingObject 

type AVAudioMixingObject struct {
	objectivec.Object
}

AVAudioMixingObject wraps an existing Objective-C object that conforms to the AVAudioMixing protocol.

func AVAudioMixingObjectFromID 

func AVAudioMixingObjectFromID(id objc.ID) AVAudioMixingObject

AVAudioMixingObjectFromID constructs a AVAudioMixingObject from an objc.ID. The object is determined to conform to the protocol at runtime.

func (AVAudioMixingObject) BaseObject 

func (o AVAudioMixingObject) BaseObject() objectivec.Object

func (AVAudioMixingObject) DestinationForMixerBus 

func (o AVAudioMixingObject) DestinationForMixerBus(mixer IAVAudioNode, bus AVAudioNodeBus) IAVAudioMixingDestination

Gets the audio mixing destination object that corresponds to the specified mixer node and input bus.

mixer: The mixer to get destination details for.

bus: The input bus.

Return Value

Returns `self` if the specified mixer or input bus matches its connection point. If the mixer or input bus doesn’t match its connection point, or if the source node isn’t in a connected state to the mixer or input bus, the method returns `nil.`

Discussion

When you connect a source node to multiple mixers downstream, setting AVAudioMixing properties directly on the source node applies the change to all of them. Use this method to get the corresponding AVAudioMixingDestination for a specific mixer. Properties set on individual destination instances don’t reflect at the source node level.

If there’s any disconnection between the source and mixer nodes, the return value can be invalid. Fetch the return value every time you want to set or get properties on a specific mixer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/destination(forMixer:bus:)

func (AVAudioMixingObject) Obstruction 

func (o AVAudioMixingObject) Obstruction() float32

A value that simulates filtering of the direct path of sound due to an obstacle.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudioMixingObject) Occlusion 

func (o AVAudioMixingObject) Occlusion() float32

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudioMixingObject) Pan 

func (o AVAudioMixingObject) Pan() float32

The bus’s stereo pan.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioMixingObject) PointSourceInHeadMode 

func (o AVAudioMixingObject) PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudioMixingObject) Position 

func (o AVAudioMixingObject) Position() AVAudio3DPoint

The location of the source in the 3D environment.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudioMixingObject) Rate 

func (o AVAudioMixingObject) Rate() float32

A value that changes the playback rate of the input signal.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudioMixingObject) RenderingAlgorithm 

func (o AVAudioMixingObject) RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

The type of rendering algorithm the mixer uses.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudioMixingObject) ReverbBlend 

func (o AVAudioMixingObject) ReverbBlend() float32

A value that controls the blend of dry and reverb processed audio.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudioMixingObject) SetObstruction 

func (o AVAudioMixingObject) SetObstruction(value float32)

A value that simulates filtering of the direct path of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks only the direct path of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudioMixingObject) SetOcclusion 

func (o AVAudioMixingObject) SetOcclusion(value float32)

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks the direct and reverb paths of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudioMixingObject) SetPan 

func (o AVAudioMixingObject) SetPan(value float32)

The bus’s stereo pan.

Discussion

The default value is `0.0`, and the range of valid values is `-1.0` to `1.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioMixingObject) SetPointSourceInHeadMode 

func (o AVAudioMixingObject) SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudioMixingObject) SetPosition 

func (o AVAudioMixingObject) SetPosition(value AVAudio3DPoint)

The location of the source in the 3D environment.

Discussion

The system specifies the coordinates in meters. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudioMixingObject) SetRate 

func (o AVAudioMixingObject) SetRate(value float32)

A value that changes the playback rate of the input signal.

Discussion

A value of `2.0` results in the output audio playing one octave higher. A value of `0.5` results in the output audio playing one octave lower.

The default value is `1.0`, and the range of valid values is `0.5` to `2.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudioMixingObject) SetRenderingAlgorithm 

func (o AVAudioMixingObject) SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)

The type of rendering algorithm the mixer uses.

Discussion

Depending on the current output format of the AVAudioEnvironmentNode instance, the system may only support a subset of the rendering algorithms. You can retrieve an array of valid rendering algorithms by calling the [ApplicableRenderingAlgorithms] function of the AVAudioEnvironmentNode instance.

The default rendering algorithm is AVAudio3DMixingRenderingAlgorithmEqualPowerPanning. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudioMixingObject) SetReverbBlend 

func (o AVAudioMixingObject) SetReverbBlend(value float32)

A value that controls the blend of dry and reverb processed audio.

Discussion

This property controls the amount of the source’s audio that the AVAudioEnvironmentNode instance processes. A value of `0.5` results in an equal blend of dry and processed (wet) audio.

The default is `0.0`, and the range of valid values is `0.0` (completely dry) to `1.0` (completely wet). Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudioMixingObject) SetSourceMode 

func (o AVAudioMixingObject) SetSourceMode(value AVAudio3DMixingSourceMode)

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudioMixingObject) SetVolume 

func (o AVAudioMixingObject) SetVolume(value float32)

The bus’s input volume.

Discussion

The default value is `1.0`, and the range of valid values is `0.0` to `1.0`. Only the AVAudioEnvironmentNode and the AVAudioMixerNode implement this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume

func (AVAudioMixingObject) SourceMode 

func (o AVAudioMixingObject) SourceMode() AVAudio3DMixingSourceMode

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudioMixingObject) Volume 

func (o AVAudioMixingObject) Volume() float32

The bus’s input volume.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume

type AVAudioNode 

type AVAudioNode struct {
	objectivec.Object
}

An object you use for audio generation, processing, or an I/O block.

Overview

An AVAudioEngine object contains instances of audio nodes that you attach, and this base class provides common functionality. Instances of this class don’t provide useful functionality until you attach them to an engine.

Nodes have input and output busses that serve as connection points. For example, an effect has one input bus and one output bus, and a mixer has multiple input busses and one output bus.

A bus contains a format the framework expresses in terms of sample rate and channel count. Formats must match exactly when making connections between nodes, excluding AVAudioMixerNode and AVAudioOutputNode.

Configuring an Input Format Bus

Creating an Output Format Bus

Installing and Removing an Audio Tap

Getting the Audio Engine for the Node

Getting the Latest Node Render Time

Getting Audio Node Properties

Resetting the Audio Node

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode

func AVAudioNodeFromID 

func AVAudioNodeFromID(id objc.ID) AVAudioNode

AVAudioNodeFromID constructs a AVAudioNode from an objc.ID.

An object you use for audio generation, processing, or an I/O block.

func NewAVAudioNode 

func NewAVAudioNode() AVAudioNode

NewAVAudioNode creates a new AVAudioNode instance.

func (AVAudioNode) AUAudioUnit 

func (a AVAudioNode) AUAudioUnit() objectivec.IObject

An audio unit object that wraps or underlies the implementation’s audio unit.

Discussion

This provides an AUAudioUnit that either wraps or underlies the implementation’s audio unit, depending on how the app packages the audio unit. Apps interact with this to control custom properties, select presets, and change parameters.

Don’t perform operations directly on the audio unit that may conflict with the engine’s state, which includes changing the initialization state, stream formats, channel layouts, or connections to other audio units.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/auAudioUnit

func (AVAudioNode) Autorelease 

func (a AVAudioNode) Autorelease() AVAudioNode

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioNode) Engine 

func (a AVAudioNode) Engine() IAVAudioEngine

The audio engine that manages the node, if any.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/engine

func (AVAudioNode) Init 

func (a AVAudioNode) Init() AVAudioNode

Init initializes the instance.

func (AVAudioNode) InputFormatForBus 

func (a AVAudioNode) InputFormatForBus(bus AVAudioNodeBus) IAVAudioFormat

Gets the input format for the bus you specify.

bus: An audio node bus.

Return Value

An AVAudioFormat instance that represents the input format of the bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/inputFormat(forBus:)

func (AVAudioNode) InstallTapOnBusBufferSizeFormatBlock 

func (a AVAudioNode) InstallTapOnBusBufferSizeFormatBlock(bus AVAudioNodeBus, bufferSize AVAudioFrameCount, format IAVAudioFormat, tapBlock AVAudioNodeTapBlock)

Installs an audio tap on a bus you specify to record, monitor, and observe the output of the node.

bus: The output bus to attach the tap to.

bufferSize: The size of the incoming buffers. The implementation may choose another size.

format: If non-`nil`, the framework applies this format to the output bus you specify. An error occurs when attaching to an output bus that’s already in a connected state. The tap and connection formats (if non-`nil`) on the bus need to be identical. Otherwise, the latter operation overrides the previous format.

For AVAudioOutputNode, you must specify the tap format as `nil`.

tapBlock: A block the framework calls with audio buffers.

Discussion

You can install and remove taps while the engine is in a running state. You can install only one tap on any bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/installTap(onBus:bufferSize:format:block:)

func (AVAudioNode) LastRenderTime 

func (a AVAudioNode) LastRenderTime() IAVAudioTime

The most recent render time.

Discussion

This value is `nil` if the engine isn’t running or if you don’t connect the node to an input or output node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/lastRenderTime

func (AVAudioNode) Latency 

func (a AVAudioNode) Latency() float64

The processing latency of the node, in seconds.

Discussion

This latency reflects the delay due to signal processing. A value of `0` indicates either no latency or an unknown latency.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/latency

func (AVAudioNode) NameForInputBus 

func (a AVAudioNode) NameForInputBus(bus AVAudioNodeBus) string

Gets the name of the input bus you specify.

bus: The input bus from an audio node.

Return Value

The name of the input bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/name(forInputBus:)

func (AVAudioNode) NameForOutputBus 

func (a AVAudioNode) NameForOutputBus(bus AVAudioNodeBus) string

Retrieves the name of the output bus you specify.

bus: The output bus from an audio node.

Return Value

The name of the output bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/name(forOutputBus:)

func (AVAudioNode) NumberOfInputs 

func (a AVAudioNode) NumberOfInputs() uint

The number of input busses for the node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/numberOfInputs

func (AVAudioNode) NumberOfOutputs 

func (a AVAudioNode) NumberOfOutputs() uint

The number of output busses for the node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/numberOfOutputs

func (AVAudioNode) OutputFormatForBus 

func (a AVAudioNode) OutputFormatForBus(bus AVAudioNodeBus) IAVAudioFormat

Retrieves the output format for the bus you specify.

bus: An audio node bus.

Return Value

An AVAudioFormat instance that represents the output format of the bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/outputFormat(forBus:)

func (AVAudioNode) OutputPresentationLatency 

func (a AVAudioNode) OutputPresentationLatency() float64

The maximum render pipeline latency downstream of the node, in seconds.

Discussion

This latency describes the maximum time it takes to present the audio at the output of a node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/outputPresentationLatency

func (AVAudioNode) RemoveTapOnBus 

func (a AVAudioNode) RemoveTapOnBus(bus AVAudioNodeBus)

Removes an audio tap on a bus you specify.

bus: The node output bus with the tap to remove.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/removeTap(onBus:)

func (AVAudioNode) Reset 

func (a AVAudioNode) Reset()

Clears a unit’s previous processing state.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode/reset()

type AVAudioNodeBus 

type AVAudioNodeBus = uint

AVAudioNodeBus is the index of a bus on an audio node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNodeBus

type AVAudioNodeClass 

type AVAudioNodeClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioNodeClass 

func GetAVAudioNodeClass() AVAudioNodeClass

GetAVAudioNodeClass returns the class object for AVAudioNode.

func (AVAudioNodeClass) Alloc 

func (ac AVAudioNodeClass) Alloc() AVAudioNode

Alloc allocates memory for a new instance of the class.

func (AVAudioNodeClass) Class 

func (ac AVAudioNodeClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioNodeCompletionHandler 

type AVAudioNodeCompletionHandler = func()

AVAudioNodeCompletionHandler is a general callback handler for an audio node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNodeCompletionHandler

type AVAudioNodeTapBlock 

type AVAudioNodeTapBlock = func(AVAudioPCMBuffer, AVAudioTime)

AVAudioNodeTapBlock is the block that receives copies of the output of an audio node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNodeTapBlock

type AVAudioOutputNode 

type AVAudioOutputNode struct {
	AVAudioIONode
}

An object that connects to the system’s audio output.

Overview

This node connects to the system’s audio output when rendering to or from an audio device. This node performs output in response to client’s requests when the engine is in manual rendering mode.

This audio node has one element. The format of the output scope reflects:

- The audio hardware sample rate and channel count when it connects to the hardware. - The engine’s manual rendering mode output format (see AVAudioOutputNode.ManualRenderingFormat).

The format of the input scope is initially the same as that of the output, but you may set it to a different format, in which case the audio node converts.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioOutputNode

func AVAudioOutputNodeFromID 

func AVAudioOutputNodeFromID(id objc.ID) AVAudioOutputNode

AVAudioOutputNodeFromID constructs a AVAudioOutputNode from an objc.ID.

An object that connects to the system’s audio output.

func NewAVAudioOutputNode 

func NewAVAudioOutputNode() AVAudioOutputNode

NewAVAudioOutputNode creates a new AVAudioOutputNode instance.

func (AVAudioOutputNode) Autorelease 

func (a AVAudioOutputNode) Autorelease() AVAudioOutputNode

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioOutputNode) Init 

func (a AVAudioOutputNode) Init() AVAudioOutputNode

Init initializes the instance.

func (AVAudioOutputNode) ManualRenderingFormat 

func (a AVAudioOutputNode) ManualRenderingFormat() IAVAudioFormat

The render format of the engine in manual rendering mode.

See: https://developer.apple.com/documentation/avfaudio/avaudioengine/manualrenderingformat

func (AVAudioOutputNode) SetManualRenderingFormat 

func (a AVAudioOutputNode) SetManualRenderingFormat(value IAVAudioFormat)

type AVAudioOutputNodeClass 

type AVAudioOutputNodeClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioOutputNodeClass 

func GetAVAudioOutputNodeClass() AVAudioOutputNodeClass

GetAVAudioOutputNodeClass returns the class object for AVAudioOutputNode.

func (AVAudioOutputNodeClass) Alloc 

func (ac AVAudioOutputNodeClass) Alloc() AVAudioOutputNode

Alloc allocates memory for a new instance of the class.

func (AVAudioOutputNodeClass) Class 

func (ac AVAudioOutputNodeClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioPCMBuffer 

type AVAudioPCMBuffer struct {
	AVAudioBuffer
}

An object that represents an audio buffer you use with PCM audio formats.

Overview

The PCM buffer class provides methods that are useful for manipulating buffers of audio in PCM format.

Creating a PCM Audio Buffer

Getting and Setting the Frame Length

Accessing PCM Buffer Data

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer

func AVAudioPCMBufferFromID 

func AVAudioPCMBufferFromID(id objc.ID) AVAudioPCMBuffer

AVAudioPCMBufferFromID constructs a AVAudioPCMBuffer from an objc.ID.

An object that represents an audio buffer you use with PCM audio formats.

func NewAVAudioPCMBuffer 

func NewAVAudioPCMBuffer() AVAudioPCMBuffer

NewAVAudioPCMBuffer creates a new AVAudioPCMBuffer instance.

func NewAudioPCMBufferWithPCMFormatFrameCapacity 

func NewAudioPCMBufferWithPCMFormatFrameCapacity(format IAVAudioFormat, frameCapacity AVAudioFrameCount) AVAudioPCMBuffer

Creates a PCM audio buffer instance for PCM audio data.

format: The format of the PCM audio the buffer contains.

frameCapacity: The capacity of the buffer in PCM sample frames.

Return Value

A new AVAudioPCMBuffer instance, or `nil` if it’s not possible.

Discussion

The method returns `nil` due to the following reasons:

- The format has zero bytes per frame. - The system can’t represent the buffer byte capacity as an unsigned bit-32 integer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer/init(pcmFormat:frameCapacity:)

func (AVAudioPCMBuffer) Autorelease 

func (a AVAudioPCMBuffer) Autorelease() AVAudioPCMBuffer

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioPCMBuffer) FloatChannelData 

func (a AVAudioPCMBuffer) FloatChannelData() unsafe.Pointer

The buffer’s audio samples as floating point values.

Discussion

The `floatChannelData` property returns pointers to the buffer’s audio samples if the buffer’s format is 32-bit float. It returns `nil` if it’s another format.

The returned pointer is to `format.ChannelCount()` pointers to float. Each of these pointers is to [FrameLength] valid samples, which the class spaces by [Stride] samples.

If the format isn’t interleaved, as with the standard deinterleaved float format, the pointers point to separate chunks of memory, and the [Stride] property value is `1`.

When the format is in an interleaved state, the pointers refer to the same buffer of interleaved samples, each offset by `1` frame, and the [Stride] property value is the number of interleaved channels.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer/floatChannelData

func (AVAudioPCMBuffer) FrameCapacity 

func (a AVAudioPCMBuffer) FrameCapacity() AVAudioFrameCount

The buffer’s capacity, in audio sample frames.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer/frameCapacity

func (AVAudioPCMBuffer) FrameLength 

func (a AVAudioPCMBuffer) FrameLength() AVAudioFrameCount

The current number of valid sample frames in the buffer.

Discussion

By default, the `frameLength` property doesn’t have a useful value upon creation, so you must set this property before using the buffer. The length must be less than or equal to the [FrameCapacity] of the buffer. For deinterleaved formats, [FrameCapacity] refers to the size of one channel’s worth of audio samples.

You may modify the length of the buffer as part of an operation that modifies its contents. Modifying `frameLength` updates the `mDataByteSize` field in each of the underlying AudioBufferList structure’s [AudioBuffer] properties correspondingly, and vice versa.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer/frameLength

func (AVAudioPCMBuffer) Init 

func (a AVAudioPCMBuffer) Init() AVAudioPCMBuffer

Init initializes the instance.

func (AVAudioPCMBuffer) InitWithPCMFormatBufferListNoCopyDeallocator 

func (a AVAudioPCMBuffer) InitWithPCMFormatBufferListNoCopyDeallocator(format IAVAudioFormat, bufferList objectivec.IObject, deallocator constAudioBufferListHandler) AVAudioPCMBuffer

Creates a PCM audio buffer instance without copying samples, for PCM audio data, with a specified buffer list and a deallocator closure.

format: The format of the PCM audio the buffer contains.

bufferList: The buffer list with the memory to contain the PCM audio data.

deallocator: The closure the method invokes when the resulting PCM buffer object deallocates.

Return Value

A new AVAudioPCMBuffer instance, or `nil` if it’s not possible.

Discussion

Use the deallocator parameter to define your own deallocation behavior for the audio buffer list’s underlying memory. The buffer list sent to the deallocator is identical to the one you specify, in term of buffer count and each buffer’s mData and mDataByteSize members.

The method returns `nil` due to the following reasons:

- The format has zero bytes per frame. - The buffer you specify has zero number of buffers. - The buffer list’s pointer to the buffer of audio data is in a `nil` state. - Each of the buffer’s data byte size aren’t equal, or if any of the buffers’ data byte size is zero. - There’s a mismatch between the format’s number of buffers and the buffer list’s size (1 if interleaved, mChannelsPerFrame if deinterleaved).

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer/init(pcmFormat:bufferListNoCopy:deallocator:)

func (AVAudioPCMBuffer) InitWithPCMFormatBufferListNoCopyDeallocatorSync 

func (a AVAudioPCMBuffer) InitWithPCMFormatBufferListNoCopyDeallocatorSync(ctx context.Context, format IAVAudioFormat, bufferList objectivec.IObject) (*objectivec.Object, error)

InitWithPCMFormatBufferListNoCopyDeallocatorSync is a synchronous wrapper around AVAudioPCMBuffer.InitWithPCMFormatBufferListNoCopyDeallocator. It blocks until the completion handler fires or the context is cancelled.

func (AVAudioPCMBuffer) InitWithPCMFormatFrameCapacity 

func (a AVAudioPCMBuffer) InitWithPCMFormatFrameCapacity(format IAVAudioFormat, frameCapacity AVAudioFrameCount) AVAudioPCMBuffer

Creates a PCM audio buffer instance for PCM audio data.

format: The format of the PCM audio the buffer contains.

frameCapacity: The capacity of the buffer in PCM sample frames.

Return Value

A new AVAudioPCMBuffer instance, or `nil` if it’s not possible.

Discussion

The method returns `nil` due to the following reasons:

- The format has zero bytes per frame. - The system can’t represent the buffer byte capacity as an unsigned bit-32 integer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer/init(pcmFormat:frameCapacity:)

func (AVAudioPCMBuffer) Int16ChannelData 

func (a AVAudioPCMBuffer) Int16ChannelData() unsafe.Pointer

The buffer’s 16-bit integer audio samples.

Discussion

The `int16ChannelData` property returns the buffer’s audio samples if the buffer’s format has 2-byte integer samples, or `nil` if it’s another format. For more information, see [FloatChannelData].

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer/int16ChannelData

func (AVAudioPCMBuffer) Int32ChannelData 

func (a AVAudioPCMBuffer) Int32ChannelData() unsafe.Pointer

The buffer’s 32-bit integer audio samples.

Discussion

The `int32ChannelData` property returns the buffer’s audio samples if the buffer’s format has 4-byte integer samples, or `nil` if it’s another format. For more information, see [FloatChannelData].

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer/int32ChannelData

func (AVAudioPCMBuffer) SetFrameLength 

func (a AVAudioPCMBuffer) SetFrameLength(value AVAudioFrameCount)

func (AVAudioPCMBuffer) Stride 

func (a AVAudioPCMBuffer) Stride() uint

The buffer’s number of interleaved channels.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer/stride

type AVAudioPCMBufferClass 

type AVAudioPCMBufferClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioPCMBufferClass 

func GetAVAudioPCMBufferClass() AVAudioPCMBufferClass

GetAVAudioPCMBufferClass returns the class object for AVAudioPCMBuffer.

func (AVAudioPCMBufferClass) Alloc 

func (ac AVAudioPCMBufferClass) Alloc() AVAudioPCMBuffer

Alloc allocates memory for a new instance of the class.

func (AVAudioPCMBufferClass) Class 

func (ac AVAudioPCMBufferClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioPacketCount 

type AVAudioPacketCount = uint32

AVAudioPacketCount is the number of packets of audio data.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPacketCount

type AVAudioPlayer 

type AVAudioPlayer struct {
	objectivec.Object
}

An object that plays audio data from a file or buffer.

Overview

Use an audio player to:

- Play audio of any duration from a file or buffer - Control the volume, panning, rate, and looping behavior of the played audio - Access playback-level metering data - Play multiple sounds simultaneously by synchronizing the playback of multiple players

For more information about preparing your app to play audio, see Configuring your app for media playback.

Creating an audio player

Controlling playback

Configuring playback settings

Accessing player timing

Managing audio channels

Managing audio-level metering

Responding to player events

Inspecting the audio data

Accessing device information

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer

func AVAudioPlayerFromID 

func AVAudioPlayerFromID(id objc.ID) AVAudioPlayer

AVAudioPlayerFromID constructs a AVAudioPlayer from an objc.ID.

An object that plays audio data from a file or buffer.

func NewAVAudioPlayer 

func NewAVAudioPlayer() AVAudioPlayer

NewAVAudioPlayer creates a new AVAudioPlayer instance.

func NewAudioPlayerWithContentsOfURLError 

func NewAudioPlayerWithContentsOfURLError(url foundation.INSURL) (AVAudioPlayer, error)

Creates a player to play audio from a file.

url: A URL that identifies the local audio file to play.

Return Value

A new audio player instance, or nil if an error occurs.

Discussion

The audio data must be in a format that Core Audio supports.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/init(contentsOf:)

func NewAudioPlayerWithContentsOfURLFileTypeHintError 

func NewAudioPlayerWithContentsOfURLFileTypeHintError(url foundation.INSURL, utiString string) (AVAudioPlayer, error)

Creates a player to play audio from a file of a particular type.

url: A URL that identifies the local audio file to play.

utiString: The uniform type identifier (UTI) string of the file format.

Return Value

A new audio player instance, or nil if there is an error.

Discussion

The audio data must be in a format that Core Audio supports. Passing a file type hint helps the system parse the data if it can’t determine the file type or if the data is corrupt. See AVFileType for supported values.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/init(contentsOf:fileTypeHint:)

func NewAudioPlayerWithDataError 

func NewAudioPlayerWithDataError(data foundation.INSData) (AVAudioPlayer, error)

Creates a player to play in-memory audio data.

data: A buffer with the audio data to play.

Return Value

A new audio player instance, or nil if an error occurs.

Discussion

The audio data must be in a format that Core Audio supports.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/init(data:)

func NewAudioPlayerWithDataFileTypeHintError 

func NewAudioPlayerWithDataFileTypeHintError(data foundation.INSData, utiString string) (AVAudioPlayer, error)

Creates a player to play in-memory audio data of a particular type.

data: A buffer with the audio data to play.

utiString: The uniform type identifier (UTI) string of the file format.

Return Value

A new audio player instance, or nil if an error occurs.

Discussion

The audio data must be in a format that Core Audio supports. Passing a file type hint helps the system parse the data if it can’t determine the file type or if the data is corrupt. See AVFileType for supported values.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/init(data:fileTypeHint:)

func (AVAudioPlayer) Autorelease 

func (a AVAudioPlayer) Autorelease() AVAudioPlayer

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioPlayer) AveragePowerForChannel 

func (a AVAudioPlayer) AveragePowerForChannel(channelNumber uint) float32

Returns the average power, in decibels full-scale (dBFS), for an audio channel.

channelNumber: The audio channel with the average power value you want to retrieve. Channel numbers are zero-indexed. A monaural signal, or the left channel of a stereo signal, has channel number `0`.

Return Value

A floating-point value, in dBFS, that indicates the audio channel’s current average power.

Discussion

Before asking the player for its average power value, you must call [UpdateMeters] to generate the latest data. The returned value ranges from `–160` dBFS, indicating minimum power, to 0 dBFS, indicating maximum power.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/averagePower(forChannel:)

func (AVAudioPlayer) CurrentDevice 

func (a AVAudioPlayer) CurrentDevice() string

The unique identifier of the current audio player.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/currentDevice

func (AVAudioPlayer) CurrentTime 

func (a AVAudioPlayer) CurrentTime() float64

The current playback time, in seconds, within the audio timeline.

Discussion

If the sound is playing, this property value is the offset, in seconds, from the start of the sound. If the sound isn’t playing, this property indicates the offset from where playback starts upon calling the [Play] method.

Use this property to seek to a specific time in the audio data or to implement audio fast-forward and rewind functions.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/currentTime

func (AVAudioPlayer) Data 

func (a AVAudioPlayer) Data() foundation.INSData

The audio data associated with the player.

Discussion

This property is nil if you don’t create the player with a data buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/data

func (AVAudioPlayer) Delegate 

func (a AVAudioPlayer) Delegate() AVAudioPlayerDelegate

The delegate object for the audio player.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/delegate

func (AVAudioPlayer) DeviceCurrentTime 

func (a AVAudioPlayer) DeviceCurrentTime() float64

The time value, in seconds, of the audio output device’s clock.

Discussion

The value of this property increases monotonically while an audio player is playing or is in a paused state. If you connect more than one audio player to the audio output device, the time continues incrementing while at least one of the players is playing or is in a paused state. If the audio output device has no connected audio players that are either playing or are in a paused state, device time reverts to `0.0`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/deviceCurrentTime

func (AVAudioPlayer) Duration 

func (a AVAudioPlayer) Duration() float64

The total duration, in seconds, of the player’s audio.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/duration

func (AVAudioPlayer) EnableRate 

func (a AVAudioPlayer) EnableRate() bool

A Boolean value that indicates whether you can adjust the playback rate of the audio player.

Discussion

To enable modifying the player’s rate, set this property to true after you create the player, but before you call [PrepareToPlay].

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/enableRate

func (AVAudioPlayer) Format 

func (a AVAudioPlayer) Format() IAVAudioFormat

The format of the player’s audio data.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/format

func (AVAudioPlayer) Init 

func (a AVAudioPlayer) Init() AVAudioPlayer

Init initializes the instance.

func (AVAudioPlayer) InitWithContentsOfURLError 

func (a AVAudioPlayer) InitWithContentsOfURLError(url foundation.INSURL) (AVAudioPlayer, error)

Creates a player to play audio from a file.

url: A URL that identifies the local audio file to play.

Return Value

A new audio player instance, or nil if an error occurs.

Discussion

The audio data must be in a format that Core Audio supports.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/init(contentsOf:)

func (AVAudioPlayer) InitWithContentsOfURLFileTypeHintError 

func (a AVAudioPlayer) InitWithContentsOfURLFileTypeHintError(url foundation.INSURL, utiString string) (AVAudioPlayer, error)

Creates a player to play audio from a file of a particular type.

url: A URL that identifies the local audio file to play.

utiString: The uniform type identifier (UTI) string of the file format.

Return Value

A new audio player instance, or nil if there is an error.

Discussion

The audio data must be in a format that Core Audio supports. Passing a file type hint helps the system parse the data if it can’t determine the file type or if the data is corrupt. See AVFileType for supported values.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/init(contentsOf:fileTypeHint:)

func (AVAudioPlayer) InitWithDataError 

func (a AVAudioPlayer) InitWithDataError(data foundation.INSData) (AVAudioPlayer, error)

Creates a player to play in-memory audio data.

data: A buffer with the audio data to play.

Return Value

A new audio player instance, or nil if an error occurs.

Discussion

The audio data must be in a format that Core Audio supports.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/init(data:)

func (AVAudioPlayer) InitWithDataFileTypeHintError 

func (a AVAudioPlayer) InitWithDataFileTypeHintError(data foundation.INSData, utiString string) (AVAudioPlayer, error)

Creates a player to play in-memory audio data of a particular type.

data: A buffer with the audio data to play.

utiString: The uniform type identifier (UTI) string of the file format.

Return Value

A new audio player instance, or nil if an error occurs.

Discussion

The audio data must be in a format that Core Audio supports. Passing a file type hint helps the system parse the data if it can’t determine the file type or if the data is corrupt. See AVFileType for supported values.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/init(data:fileTypeHint:)

func (AVAudioPlayer) MeteringEnabled 

func (a AVAudioPlayer) MeteringEnabled() bool

A Boolean value that indicates whether the player is able to generate audio-level metering data.

Discussion

By default, the player doesn’t generate audio-level metering data. Because metering uses computing resources, enable it only if you intend to use it.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/isMeteringEnabled

func (AVAudioPlayer) NumberOfChannels 

func (a AVAudioPlayer) NumberOfChannels() uint

The number of audio channels in the player’s audio.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/numberOfChannels

func (AVAudioPlayer) NumberOfLoops 

func (a AVAudioPlayer) NumberOfLoops() int

The number of times the audio repeats playback.

Discussion

The default value of `0` results in the sound playing once. Set a positive integer value to specify the number of times to repeat the sound. For example, a value of `1` plays the sound twice: the original sound and one repetition. Set a negative integer value to loop the sound continuously until you call the [Stop] method.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/numberOfLoops

func (AVAudioPlayer) Pan 

func (a AVAudioPlayer) Pan() float32

The audio player’s stereo pan position.

Discussion

Set this property value to position the audio in the stereo field. Use a value of `-1.0` to indicate full left, `1.0` for full right, and `0.0` for center.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/pan

func (AVAudioPlayer) Pause 

func (a AVAudioPlayer) Pause()

Pauses audio playback.

Discussion

Unlike calling [Stop], pausing playback doesn’t deallocate hardware resources. It leaves the audio ready to resume playback from where it stops.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/pause()

func (AVAudioPlayer) PeakPowerForChannel 

func (a AVAudioPlayer) PeakPowerForChannel(channelNumber uint) float32

Returns the peak power, in decibels full-scale (dBFS), for an audio channel.

channelNumber: The audio channel with the peak power value you want to obtain. Channel numbers are zero-indexed. A monaural signal, or the left channel of a stereo signal, has channel number `0`.

Return Value

A floating-point value, in dBFS, that indicates the audio channel’s current peak power.

Discussion

Before asking the player for its peak power value, you must call [UpdateMeters] to generate the latest data. The returned value ranges from `–160` dBFS, indicating minimum power, to 0 dBFS, indicating maximum power.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/peakPower(forChannel:)

func (AVAudioPlayer) Play 

func (a AVAudioPlayer) Play() bool

Plays audio asynchronously.

Return Value

true if playback starts successfully; otherwise, false.

Discussion

Calling this method implicitly calls [PrepareToPlay] if the audio player is unprepared for playback.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/play()

func (AVAudioPlayer) PlayAtTime 

func (a AVAudioPlayer) PlayAtTime(time float64) bool

Plays audio asynchronously, starting at a specified point in the audio output device’s timeline.

time: The audio device time to begin playback. This time must be later than the device’s current time.

Return Value

true if playback starts successfully; otherwise, false.

Discussion

Use this method to precisely synchronize the playback of two or more audio player objects as the following example shows:

Calling this method implicitly calls [PrepareToPlay] if the audio player is unprepared for playback.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/play(atTime:)

func (AVAudioPlayer) Playing 

func (a AVAudioPlayer) Playing() bool

A Boolean value that indicates whether the player is currently playing audio.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/isPlaying

func (AVAudioPlayer) PrepareToPlay 

func (a AVAudioPlayer) PrepareToPlay() bool

Prepares the player for audio playback.

Return Value

true if the system successfully prepares the player; otherwise, false.

Discussion

Calling this method preloads audio buffers and acquires the audio hardware necessary for playback. This method activates the audio session, so pass false to setActive:error: if immediate playback isn’t necessary. For example, when using the category option AVAudioSessionCategoryOptionDuckOthers, this method lowers the audio outside of the app.

The system calls this method when using the method [Play], but calling it in advance minimizes the delay between calling `play()` and the start of sound output.

Calling [Stop], or allowing a sound to finish playing, undoes this setup.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/prepareToPlay()

func (AVAudioPlayer) Rate 

func (a AVAudioPlayer) Rate() float32

The audio player’s playback rate.

Discussion

To set an audio player’s playback rate, you must first enable the rate adjustment by setting its [EnableRate] property to true.

The default value of this property is `1.0`, which indicates that audio playback occurs at standard speed. This property supports values in the range of `0.5` for half-speed playback to `2.0` for double-speed playback.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/rate

func (AVAudioPlayer) SetCurrentDevice 

func (a AVAudioPlayer) SetCurrentDevice(value string)

func (AVAudioPlayer) SetCurrentTime 

func (a AVAudioPlayer) SetCurrentTime(value float64)

func (AVAudioPlayer) SetDelegate 

func (a AVAudioPlayer) SetDelegate(value AVAudioPlayerDelegate)

func (AVAudioPlayer) SetEnableRate 

func (a AVAudioPlayer) SetEnableRate(value bool)

func (AVAudioPlayer) SetMeteringEnabled 

func (a AVAudioPlayer) SetMeteringEnabled(value bool)

func (AVAudioPlayer) SetNumberOfLoops 

func (a AVAudioPlayer) SetNumberOfLoops(value int)

func (AVAudioPlayer) SetPan 

func (a AVAudioPlayer) SetPan(value float32)

func (AVAudioPlayer) SetRate 

func (a AVAudioPlayer) SetRate(value float32)

func (AVAudioPlayer) SetVolume 

func (a AVAudioPlayer) SetVolume(value float32)

func (AVAudioPlayer) SetVolumeFadeDuration 

func (a AVAudioPlayer) SetVolumeFadeDuration(volume float32, duration float64)

Changes the audio player’s volume over a duration of time.

volume: The target volume.

duration: The duration, in seconds, over which to fade the volume.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/setVolume(_:fadeDuration:)

func (AVAudioPlayer) Settings 

func (a AVAudioPlayer) Settings() foundation.INSDictionary

A dictionary that provides information about the player’s audio data.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/settings

func (AVAudioPlayer) Stop 

func (a AVAudioPlayer) Stop()

Stops playback and undoes the setup the system requires for playback.

Discussion

Calling this method undoes the resource allocation the system performs in [PrepareToPlay] or [Play]. It doesn’t reset the player’s [CurrentTime] value to `0`, so playback resumes from where it stops.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/stop()

func (AVAudioPlayer) UpdateMeters 

func (a AVAudioPlayer) UpdateMeters()

Refreshes the average and peak power values for all channels of an audio player.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/updateMeters()

func (AVAudioPlayer) Url 

func (a AVAudioPlayer) Url() foundation.INSURL

The URL of the audio file.

Discussion

This property is nil if you don’t create the player with a URL.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/url

func (AVAudioPlayer) Volume 

func (a AVAudioPlayer) Volume() float32

The audio player’s volume relative to other audio output.

Discussion

This property supports values ranging from `0.0` for silence to `1.0` for full volume.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer/volume

type AVAudioPlayerClass 

type AVAudioPlayerClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioPlayerClass 

func GetAVAudioPlayerClass() AVAudioPlayerClass

GetAVAudioPlayerClass returns the class object for AVAudioPlayer.

func (AVAudioPlayerClass) Alloc 

func (ac AVAudioPlayerClass) Alloc() AVAudioPlayer

Alloc allocates memory for a new instance of the class.

func (AVAudioPlayerClass) Class 

func (ac AVAudioPlayerClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioPlayerDelegate 

type AVAudioPlayerDelegate interface {
	objectivec.IObject
}

A protocol that defines the methods to respond to audio playback events and decoding errors.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerDelegate

type AVAudioPlayerDelegateConfig 

type AVAudioPlayerDelegateConfig struct {

	// Responding to Playback Completion
	// AudioPlayerDidFinishPlayingSuccessfully — Tells the delegate when the audio finishes playing.
	AudioPlayerDidFinishPlayingSuccessfully func(player AVAudioPlayer, flag bool)

	// Responding to Audio Decoding Errors
	// AudioPlayerDecodeErrorDidOccurError — Tells the delegate when an audio player encounters a decoding error during playback.
	AudioPlayerDecodeErrorDidOccurError func(player AVAudioPlayer, error_ foundation.NSError)
}

AVAudioPlayerDelegateConfig holds optional typed callbacks for AVAudioPlayerDelegate methods. Set non-nil fields to register the corresponding Objective-C delegate method. Methods with nil callbacks are not registered, so [NSObject.RespondsToSelector] returns false for them — matching the Objective-C delegate pattern exactly.

See Apple Documentation for protocol details.

type AVAudioPlayerDelegateObject 

type AVAudioPlayerDelegateObject struct {
	objectivec.Object
}

AVAudioPlayerDelegateObject wraps an existing Objective-C object that conforms to the AVAudioPlayerDelegate protocol.

func AVAudioPlayerDelegateObjectFromID 

func AVAudioPlayerDelegateObjectFromID(id objc.ID) AVAudioPlayerDelegateObject

AVAudioPlayerDelegateObjectFromID constructs a AVAudioPlayerDelegateObject from an objc.ID. The object is determined to conform to the protocol at runtime.

func NewAVAudioPlayerDelegate 

func NewAVAudioPlayerDelegate(config AVAudioPlayerDelegateConfig) AVAudioPlayerDelegateObject

NewAVAudioPlayerDelegate creates an Objective-C object implementing the AVAudioPlayerDelegate protocol.

Each call registers a unique Objective-C class containing only the methods set in config. This means [NSObject.RespondsToSelector] works correctly for optional delegate methods — only non-nil callbacks are registered.

The returned AVAudioPlayerDelegateObject satisfies the AVAudioPlayerDelegate interface and can be passed directly to SetDelegate and similar methods.

See Apple Documentation for protocol details.

func (AVAudioPlayerDelegateObject) AudioPlayerDecodeErrorDidOccurError 

func (o AVAudioPlayerDelegateObject) AudioPlayerDecodeErrorDidOccurError(player IAVAudioPlayer, error_ foundation.INSError)

Tells the delegate when an audio player encounters a decoding error during playback.

player: The audio player that encounters the decoding error.

error: The decoding error.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerDelegate/audioPlayerDecodeErrorDidOccur(_:error:)

func (AVAudioPlayerDelegateObject) AudioPlayerDidFinishPlayingSuccessfully 

func (o AVAudioPlayerDelegateObject) AudioPlayerDidFinishPlayingSuccessfully(player IAVAudioPlayer, flag bool)

Tells the delegate when the audio finishes playing.

player: The audio player that finishes playing.

flag: A Boolean value that indicates whether the audio finishes playing successfully.

Discussion

The system doesn’t call this method on an audio interruption.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerDelegate/audioPlayerDidFinishPlaying(_:successfully:)

func (AVAudioPlayerDelegateObject) BaseObject 

func (o AVAudioPlayerDelegateObject) BaseObject() objectivec.Object

type AVAudioPlayerNode 

type AVAudioPlayerNode struct {
	AVAudioNode
}

An object for scheduling the playback of buffers or segments of audio files.

Overview

This audio node supports scheduling the playback of AVAudioPCMBuffer instances, or segments of audio files that you open through AVAudioFile. You can schedule buffers and segments to play at specific points in time or to play immediately following preceding segments.

Generally, you want to configure the node’s output format with the same number of channels as in the files and buffers. Otherwise, the node drops or adds channels as necessary. It’s usually preferable to use an AVAudioMixerNode for this configuration.

Similarly, when playing file segments, the node makes sample rate conversions, if necessary. It’s preferable to configure the node’s output sample rate to match that of the files, and to use a mixer to perform the rate conversion.

When playing buffers, there’s an implicit assumption that the buffers are at the same sample rate as the node’s output format.

The AVAudioPlayerNode.Stop method unschedules all previously scheduled buffers and file segments, and returns the player timeline to sample time `0`.

Player Timeline

The usual AVAudioNode sample times, which [AVAudioPlayerNode.LastRenderTime] observes, have an arbitrary zero point. The AVAudioPlayerNode class superimposes a second player timeline on top of this to reflect when the player starts and intervals when it pauses. The methods AVAudioPlayerNode.NodeTimeForPlayerTime and AVAudioPlayerNode.PlayerTimeForNodeTime convert between the two.

Scheduling Playback Time

The AVAudioPlayerNode.ScheduleBufferAtTimeOptionsCompletionHandler, AVAudioPlayerNode.ScheduleFileAtTimeCompletionHandler, and AVAudioPlayerNode.ScheduleSegmentStartingFrameFrameCountAtTimeCompletionHandler methods take an AVAudioTime `when` parameter, and you interpret it as follows:

- If the `when` parameter is `nil`: - If there are previous commands, the new one plays immediately following the last one. - Otherwise, if the node is in a playing state, the event plays in the very near future. - Otherwise, the command plays at sample time `0`. - If the `when` parameter is a sample time, the parameter interprets it as such. - If the `when` parameter is a host time, the system ignores it unless the sample time is invalid when the engine is rendering to an audio device.

The scheduling methods fail if:

- A buffer’s channel count doesn’t match that of the node’s output format. - The system can’t access a file. - An AVAudioTime doesn’t specify a valid sample time or a host time. - A segment’s start frame or frame count is a negative value.

Handling Buffer or File Completion

The buffer of file completion handlers are a means to schedule more data if available on the player node. For more information on the different completion callback types, see AVAudioPlayerNodeCompletionCallbackType.

Rendering Offline

When you use a player node with the engine operating in manual rendering mode, you use the buffer or file completion handlers — [AVAudioPlayerNode.LastRenderTime], [AVAudioPlayerNode.Latency], and [AVAudioPlayerNode.OutputPresentationLatency] — to track how much data the player rendered and how much remains to render.

Scheduling Playback

Converting Node and Player Times

Controlling Playback

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode

func AVAudioPlayerNodeFromID 

func AVAudioPlayerNodeFromID(id objc.ID) AVAudioPlayerNode

AVAudioPlayerNodeFromID constructs a AVAudioPlayerNode from an objc.ID.

An object for scheduling the playback of buffers or segments of audio files.

func NewAVAudioPlayerNode 

func NewAVAudioPlayerNode() AVAudioPlayerNode

NewAVAudioPlayerNode creates a new AVAudioPlayerNode instance.

func (AVAudioPlayerNode) Autorelease 

func (a AVAudioPlayerNode) Autorelease() AVAudioPlayerNode

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioPlayerNode) DestinationForMixerBus 

func (a AVAudioPlayerNode) DestinationForMixerBus(mixer IAVAudioNode, bus AVAudioNodeBus) IAVAudioMixingDestination

Gets the audio mixing destination object that corresponds to the specified mixer node and input bus.

mixer: The mixer to get destination details for.

bus: The input bus.

Return Value

Returns `self` if the specified mixer or input bus matches its connection point. If the mixer or input bus doesn’t match its connection point, or if the source node isn’t in a connected state to the mixer or input bus, the method returns `nil.`

Discussion

When you connect a source node to multiple mixers downstream, setting AVAudioMixing properties directly on the source node applies the change to all of them. Use this method to get the corresponding AVAudioMixingDestination for a specific mixer. Properties set on individual destination instances don’t reflect at the source node level.

If there’s any disconnection between the source and mixer nodes, the return value can be invalid. Fetch the return value every time you want to set or get properties on a specific mixer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/destination(forMixer:bus:)

func (AVAudioPlayerNode) Init 

func (a AVAudioPlayerNode) Init() AVAudioPlayerNode

Init initializes the instance.

func (AVAudioPlayerNode) NodeTimeForPlayerTime 

func (a AVAudioPlayerNode) NodeTimeForPlayerTime(playerTime IAVAudioTime) IAVAudioTime

Converts from player time to node time.

playerTime: A time relative to the player’s start time.

Return Value

A node time, or `nil` if the player isn’t playing.

Discussion

For more information about this method and its inverse [PlayerTimeForNodeTime], see AVAudioPlayerNode.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/nodeTime(forPlayerTime:)

func (AVAudioPlayerNode) Obstruction 

func (a AVAudioPlayerNode) Obstruction() float32

A value that simulates filtering of the direct path of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks only the direct path of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudioPlayerNode) Occlusion 

func (a AVAudioPlayerNode) Occlusion() float32

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks the direct and reverb paths of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudioPlayerNode) Pan 

func (a AVAudioPlayerNode) Pan() float32

The bus’s stereo pan.

Discussion

The default value is `0.0`, and the range of valid values is `-1.0` to `1.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioPlayerNode) Pause 

func (a AVAudioPlayerNode) Pause()

Pauses the node’s playback.

Discussion

The player’s sample time doesn’t advance while the node is in a paused state.

Pausing or stopping all of the players you connect to an engine doesn’t pause or stop the engine or the underlying hardware. You must explicitly pause or stop the engine for the hardware to stop. When your app doesn’t need to play audio, pause or stop the engine to minimize power consumption.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/pause()

func (AVAudioPlayerNode) Play 

func (a AVAudioPlayerNode) Play()

Starts or resumes playback immediately.

Discussion

This is equivalent to [PlayAtTime] with a value of `nil`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/play()

func (AVAudioPlayerNode) PlayAtTime 

func (a AVAudioPlayerNode) PlayAtTime(when IAVAudioTime)

Starts or resumes playback at a time you specify.

when: The node time to start or resume playback. Passing `nil` starts playback immediately.

Discussion

This node is initially in a paused state. The framework enqueues your requests to play buffers or file segments, and any necessary decoding begins immediately. Playback doesn’t begin until the player starts playing through this method.

The following example code shows how to start a player `0.5` seconds in the future:

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/play(at:)

func (AVAudioPlayerNode) PlayerTimeForNodeTime 

func (a AVAudioPlayerNode) PlayerTimeForNodeTime(nodeTime IAVAudioTime) IAVAudioTime

Converts from node time to player time.

nodeTime: The node time.

Return Value

A time relative to the player’s start time, or `nil` if the player isn’t playing.

Discussion

For more information about this method and its inverse [NodeTimeForPlayerTime], see AVAudioPlayerNode.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/playerTime(forNodeTime:)

func (AVAudioPlayerNode) Playing 

func (a AVAudioPlayerNode) Playing() bool

A Boolean value that indicates whether the player is playing.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/isPlaying

func (AVAudioPlayerNode) PointSourceInHeadMode 

func (a AVAudioPlayerNode) PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudioPlayerNode) Position 

func (a AVAudioPlayerNode) Position() AVAudio3DPoint

The location of the source in the 3D environment.

Discussion

The system specifies the coordinates in meters. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudioPlayerNode) PrepareWithFrameCount 

func (a AVAudioPlayerNode) PrepareWithFrameCount(frameCount AVAudioFrameCount)

Prepares the file regions or buffers you schedule for playback.

frameCount: The number of sample frames of data to prepare.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/prepare(withFrameCount:)

func (AVAudioPlayerNode) Rate 

func (a AVAudioPlayerNode) Rate() float32

A value that changes the playback rate of the input signal.

Discussion

A value of `2.0` results in the output audio playing one octave higher. A value of `0.5` results in the output audio playing one octave lower.

The default value is `1.0`, and the range of valid values is `0.5` to `2.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudioPlayerNode) RenderingAlgorithm 

func (a AVAudioPlayerNode) RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

The type of rendering algorithm the mixer uses.

Discussion

Depending on the current output format of the AVAudioEnvironmentNode instance, the system may only support a subset of the rendering algorithms. You can retrieve an array of valid rendering algorithms by calling the [ApplicableRenderingAlgorithms] function of the AVAudioEnvironmentNode instance.

The default rendering algorithm is AVAudio3DMixingRenderingAlgorithmEqualPowerPanning. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudioPlayerNode) ReverbBlend 

func (a AVAudioPlayerNode) ReverbBlend() float32

A value that controls the blend of dry and reverb processed audio.

Discussion

This property controls the amount of the source’s audio that the AVAudioEnvironmentNode instance processes. A value of `0.5` results in an equal blend of dry and processed (wet) audio.

The default is `0.0`, and the range of valid values is `0.0` (completely dry) to `1.0` (completely wet). Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudioPlayerNode) ScheduleBufferAtTimeOptionsCompletionCallbackTypeCompletionHandler 

func (a AVAudioPlayerNode) ScheduleBufferAtTimeOptionsCompletionCallbackTypeCompletionHandler(buffer IAVAudioPCMBuffer, when IAVAudioTime, options AVAudioPlayerNodeBufferOptions, callbackType AVAudioPlayerNodeCompletionCallbackType, completionHandler ErrorHandler)

Schedules the playing samples from an audio buffer with the playback options you specify.

buffer: The buffer to play.

when: The time the buffer plays.

options: The playback options that control buffer scheduling.

callbackType: The option to specify when the system must call the completion handler.

completionHandler: The handler the system calls after the player schedules the buffer for playback on the render thread, or the player stops.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/scheduleBuffer(_:at:options:completionCallbackType:completionHandler:)

func (AVAudioPlayerNode) ScheduleBufferAtTimeOptionsCompletionHandler 

func (a AVAudioPlayerNode) ScheduleBufferAtTimeOptionsCompletionHandler(buffer IAVAudioPCMBuffer, when IAVAudioTime, options AVAudioPlayerNodeBufferOptions, completionHandler ErrorHandler)

Schedules the playing samples from an audio buffer at the time and playback options you specify.

buffer: The buffer to play.

when: The time the buffer plays. For more information, see AVAudioPlayerNode.

options: The playback options that control buffer scheduling.

completionHandler: The handler the system calls after the player schedules the buffer for playback on the render thread, or the player stops.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/scheduleBuffer(_:at:options:completionHandler:)

func (AVAudioPlayerNode) ScheduleBufferCompletionCallbackTypeCompletionHandler 

func (a AVAudioPlayerNode) ScheduleBufferCompletionCallbackTypeCompletionHandler(buffer IAVAudioPCMBuffer, callbackType AVAudioPlayerNodeCompletionCallbackType, completionHandler ErrorHandler)

Schedules the playing samples from an audio buffer with the callback option you specify.

buffer: The buffer to play.

callbackType: The option to specify when the system must call the completion handler.

completionHandler: The handler the system calls after the player schedules the buffer for playback on the render thread, or the player stops.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/scheduleBuffer(_:completionCallbackType:completionHandler:)

func (AVAudioPlayerNode) ScheduleBufferCompletionHandler 

func (a AVAudioPlayerNode) ScheduleBufferCompletionHandler(buffer IAVAudioPCMBuffer, completionHandler ErrorHandler)

Schedules the playing samples from an audio buffer.

buffer: The buffer to play.

completionHandler: The handler the system calls after the player schedules the buffer for playback on the render thread, or the player stops.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/scheduleBuffer(_:completionHandler:)

func (AVAudioPlayerNode) ScheduleFileAtTimeCompletionCallbackTypeCompletionHandler 

func (a AVAudioPlayerNode) ScheduleFileAtTimeCompletionCallbackTypeCompletionHandler(file IAVAudioFile, when IAVAudioTime, callbackType AVAudioPlayerNodeCompletionCallbackType, completionHandler ErrorHandler)

Schedules the playing of an entire audio file with a callback option you specify.

file: The file to play.

when: The time the file plays.

callbackType: The option to specify when the system must call the completion handler.

completionHandler: The handler the system calls after the player schedules the file for playback on the render thread, or the player stops.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/scheduleFile(_:at:completionCallbackType:completionHandler:)

func (AVAudioPlayerNode) ScheduleFileAtTimeCompletionHandler 

func (a AVAudioPlayerNode) ScheduleFileAtTimeCompletionHandler(file IAVAudioFile, when IAVAudioTime, completionHandler ErrorHandler)

Schedules the playing of an entire audio file.

file: The URL of the file to play.

when: The time the buffer plays. For more information, see AVAudioPlayerNode.

completionHandler: The handler the system calls after the player schedules the file for playback on the render thread, or the player stops.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/scheduleFile(_:at:completionHandler:)

func (AVAudioPlayerNode) ScheduleSegmentStartingFrameFrameCountAtTimeCompletionCallbackTypeCompletionHandler 

func (a AVAudioPlayerNode) ScheduleSegmentStartingFrameFrameCountAtTimeCompletionCallbackTypeCompletionHandler(file IAVAudioFile, startFrame AVAudioFramePosition, numberFrames AVAudioFrameCount, when IAVAudioTime, callbackType AVAudioPlayerNodeCompletionCallbackType, completionHandler ErrorHandler)

Schedules the playing of an audio file segment with a callback option you specify.

file: The file to play.

startFrame: The starting frame position in the stream.

numberFrames: The number of frames to play.

when: The time the region plays.

callbackType: The option to specify when the system must call the completion handler.

completionHandler: The handler the system calls after the player schedules the segment for playback on the render thread, or the player stops.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/scheduleSegment(_:startingFrame:frameCount:at:completionCallbackType:completionHandler:)

func (AVAudioPlayerNode) ScheduleSegmentStartingFrameFrameCountAtTimeCompletionHandler 

func (a AVAudioPlayerNode) ScheduleSegmentStartingFrameFrameCountAtTimeCompletionHandler(file IAVAudioFile, startFrame AVAudioFramePosition, numberFrames AVAudioFrameCount, when IAVAudioTime, completionHandler ErrorHandler)

Schedules the playing of an audio file segment.

file: The URL of the file to play.

startFrame: The starting frame position in the stream.

numberFrames: The number of frames to play.

when: The time the buffer plays. For more information, see AVAudioPlayerNode.

completionHandler: The handler the system calls after the player schedules the segment for playback on the render thread, or the player stops.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/scheduleSegment(_:startingFrame:frameCount:at:completionHandler:)

func (AVAudioPlayerNode) SetObstruction 

func (a AVAudioPlayerNode) SetObstruction(value float32)

func (AVAudioPlayerNode) SetOcclusion 

func (a AVAudioPlayerNode) SetOcclusion(value float32)

func (AVAudioPlayerNode) SetPan 

func (a AVAudioPlayerNode) SetPan(value float32)

func (AVAudioPlayerNode) SetPointSourceInHeadMode 

func (a AVAudioPlayerNode) SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

func (AVAudioPlayerNode) SetPosition 

func (a AVAudioPlayerNode) SetPosition(value AVAudio3DPoint)

func (AVAudioPlayerNode) SetRate 

func (a AVAudioPlayerNode) SetRate(value float32)

func (AVAudioPlayerNode) SetRenderingAlgorithm 

func (a AVAudioPlayerNode) SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)

func (AVAudioPlayerNode) SetReverbBlend 

func (a AVAudioPlayerNode) SetReverbBlend(value float32)

func (AVAudioPlayerNode) SetSourceMode 

func (a AVAudioPlayerNode) SetSourceMode(value AVAudio3DMixingSourceMode)

func (AVAudioPlayerNode) SetVolume 

func (a AVAudioPlayerNode) SetVolume(value float32)

func (AVAudioPlayerNode) SourceMode 

func (a AVAudioPlayerNode) SourceMode() AVAudio3DMixingSourceMode

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudioPlayerNode) Stop 

func (a AVAudioPlayerNode) Stop()

Clears all of the node’s events you schedule and stops playback.

Discussion

Clears all events you schedule, including any events in the middle of playing. It resets the node’s sample time to `0`, and doesn’t proceed until the node starts again through [Play] or [PlayAtTime].

Pausing or stopping all of the players you connect to an engine doesn’t pause or stop the engine or the underlying hardware. You must explicitly pause or stop the engine for the hardware to stop. When your app doesn’t need to play audio, pause or stop the engine to minimize power consumption.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode/stop()

func (AVAudioPlayerNode) Volume 

func (a AVAudioPlayerNode) Volume() float32

The bus’s input volume.

Discussion

The default value is `1.0`, and the range of valid values is `0.0` to `1.0`. Only the AVAudioEnvironmentNode and the AVAudioMixerNode implement this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume

type AVAudioPlayerNodeBufferOptions 

type AVAudioPlayerNodeBufferOptions uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNodeBufferOptions 

const (
	// AVAudioPlayerNodeBufferInterrupts: An option that indicates the buffer interrupts any buffer in a playing state.
	AVAudioPlayerNodeBufferInterrupts AVAudioPlayerNodeBufferOptions = 2
	// AVAudioPlayerNodeBufferInterruptsAtLoop: An option that indicates the buffer interrupts any buffer in a playing state at its loop point.
	AVAudioPlayerNodeBufferInterruptsAtLoop AVAudioPlayerNodeBufferOptions = 4
	// AVAudioPlayerNodeBufferLoops: An option that indicates the buffer loops indefinitely.
	AVAudioPlayerNodeBufferLoops AVAudioPlayerNodeBufferOptions = 1
)

func (AVAudioPlayerNodeBufferOptions) String 

func (e AVAudioPlayerNodeBufferOptions) String() string

type AVAudioPlayerNodeClass 

type AVAudioPlayerNodeClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioPlayerNodeClass 

func GetAVAudioPlayerNodeClass() AVAudioPlayerNodeClass

GetAVAudioPlayerNodeClass returns the class object for AVAudioPlayerNode.

func (AVAudioPlayerNodeClass) Alloc 

func (ac AVAudioPlayerNodeClass) Alloc() AVAudioPlayerNode

Alloc allocates memory for a new instance of the class.

func (AVAudioPlayerNodeClass) Class 

func (ac AVAudioPlayerNodeClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioPlayerNodeCompletionCallbackType 

type AVAudioPlayerNodeCompletionCallbackType int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNodeCompletionCallbackType 

const (
	// AVAudioPlayerNodeCompletionDataConsumed: A completion handler that indicates the player consumes the buffer or file data.
	AVAudioPlayerNodeCompletionDataConsumed AVAudioPlayerNodeCompletionCallbackType = 0
	// AVAudioPlayerNodeCompletionDataPlayedBack: A completion handler that indicates the player finishes the buffer or file data.
	AVAudioPlayerNodeCompletionDataPlayedBack AVAudioPlayerNodeCompletionCallbackType = 2
	// AVAudioPlayerNodeCompletionDataRendered: A completion handler that indicates the player renders the buffer or file data.
	AVAudioPlayerNodeCompletionDataRendered AVAudioPlayerNodeCompletionCallbackType = 1
)

func (AVAudioPlayerNodeCompletionCallbackType) String 

func (e AVAudioPlayerNodeCompletionCallbackType) String() string

type AVAudioPlayerNodeCompletionHandler 

type AVAudioPlayerNodeCompletionHandler = func(AVAudioPlayerNodeCompletionCallbackType)

AVAudioPlayerNodeCompletionHandler is the callback handler for buffer or file completion.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNodeCompletionHandler

type AVAudioQuality 

type AVAudioQuality int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioQuality 

const (
	// AVAudioQualityHigh: A value that represents a high audio quality for encoding and conversion.
	AVAudioQualityHigh AVAudioQuality = 96
	// AVAudioQualityLow: A value that represents a low audio quality for encoding and conversion.
	AVAudioQualityLow AVAudioQuality = 32
	// AVAudioQualityMax: A value that represents a maximum audio quality for encoding and conversion.
	AVAudioQualityMax AVAudioQuality = 127
	// AVAudioQualityMedium: A value that represents a medium audio quality for encoding and conversion.
	AVAudioQualityMedium AVAudioQuality = 64
	// AVAudioQualityMin: A value that represents a minimum audio quality for encoding and conversion.
	AVAudioQualityMin AVAudioQuality = 0
)

func (AVAudioQuality) String 

func (e AVAudioQuality) String() string

type AVAudioRecorder 

type AVAudioRecorder struct {
	objectivec.Object
}

An object that records audio data to a file.

Overview

Use an audio recorder to:

- Record audio from the system’s active input device - Record for a specified duration or until the user stops recording - Pause and resume a recording - Access recording-level metering data

To record audio in iOS or tvOS, configure your audio session to use the AVAudioRecorder.Record or AVAudioRecorder.PlayAndRecord category.

Creating an audio recorder

Controlling recording

Accessing recorder timing

Managing audio-level metering

Responding to recorder events

Inspecting the audio data

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder

func AVAudioRecorderFromID 

func AVAudioRecorderFromID(id objc.ID) AVAudioRecorder

AVAudioRecorderFromID constructs a AVAudioRecorder from an objc.ID.

An object that records audio data to a file.

func NewAVAudioRecorder 

func NewAVAudioRecorder() AVAudioRecorder

NewAVAudioRecorder creates a new AVAudioRecorder instance.

func NewAudioRecorderWithURLFormatError 

func NewAudioRecorderWithURLFormatError(url foundation.INSURL, format IAVAudioFormat) (AVAudioRecorder, error)

Creates an audio recorder with an audio format.

url: The file system location to record to.

format: The audio format to use for the recording.

Return Value

A new audio recorder, or nil if an error occurred.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/init(url:format:)

func NewAudioRecorderWithURLSettingsError 

func NewAudioRecorderWithURLSettingsError(url foundation.INSURL, settings foundation.INSDictionary) (AVAudioRecorder, error)

Creates an audio recorder with settings.

url: The file system location to record to.

settings: The audio settings to use for the recording.

Return Value

A new audio recorder, or nil if an error occurred.

Discussion

The system supports the following keys when defining the format settings:

[Table data omitted]

The system supports additional configuration options based on your selected audio format. See Linear PCM format settings for information about customizing Linear PCM formats and Encoder settings for compressed formats.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/init(url:settings:)

func (AVAudioRecorder) Autorelease 

func (a AVAudioRecorder) Autorelease() AVAudioRecorder

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioRecorder) AveragePowerForChannel 

func (a AVAudioRecorder) AveragePowerForChannel(channelNumber uint) float32

Returns the average power, in decibels full-scale (dBFS), for an audio channel.

channelNumber: The number of the channel that you want the average power value for.

Return Value

The audio channel’s current average power.

Discussion

Before asking the player for its average power value, you must call [UpdateMeters] to generate the latest data. The returned value ranges from `–160` dBFS, indicating minimum power, to 0 dBFS, indicating maximum power.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/averagePower(forChannel:)

func (AVAudioRecorder) CurrentTime 

func (a AVAudioRecorder) CurrentTime() float64

The time, in seconds, since the beginning of the recording.

Discussion

The value of this property is `0` when you call it on a stopped audio recorder.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/currentTime

func (AVAudioRecorder) Delegate 

func (a AVAudioRecorder) Delegate() AVAudioRecorderDelegate

The delegate object for the audio recorder.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/delegate

func (AVAudioRecorder) DeleteRecording 

func (a AVAudioRecorder) DeleteRecording() bool

Deletes a recorded audio file.

Return Value

true if the system deleted the file; otherwise, false.

Discussion

You must stop the audio recorder before calling this method.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/deleteRecording()

func (AVAudioRecorder) DeviceCurrentTime 

func (a AVAudioRecorder) DeviceCurrentTime() float64

The time, in seconds, of the host audio device.

Discussion

Use this property value to schedule audio recording using the [RecordAtTime] and [RecordAtTimeForDuration] methods.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/deviceCurrentTime

func (AVAudioRecorder) Format 

func (a AVAudioRecorder) Format() IAVAudioFormat

The format of the recorded audio.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/format

func (AVAudioRecorder) Init 

func (a AVAudioRecorder) Init() AVAudioRecorder

Init initializes the instance.

func (AVAudioRecorder) InitWithURLFormatError 

func (a AVAudioRecorder) InitWithURLFormatError(url foundation.INSURL, format IAVAudioFormat) (AVAudioRecorder, error)

Creates an audio recorder with an audio format.

url: The file system location to record to.

format: The audio format to use for the recording.

Return Value

A new audio recorder, or nil if an error occurred.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/init(url:format:)

func (AVAudioRecorder) InitWithURLSettingsError 

func (a AVAudioRecorder) InitWithURLSettingsError(url foundation.INSURL, settings foundation.INSDictionary) (AVAudioRecorder, error)

Creates an audio recorder with settings.

url: The file system location to record to.

settings: The audio settings to use for the recording.

Return Value

A new audio recorder, or nil if an error occurred.

Discussion

The system supports the following keys when defining the format settings:

[Table data omitted]

The system supports additional configuration options based on your selected audio format. See Linear PCM format settings for information about customizing Linear PCM formats and Encoder settings for compressed formats.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/init(url:settings:)

func (AVAudioRecorder) MeteringEnabled 

func (a AVAudioRecorder) MeteringEnabled() bool

A Boolean value that indicates whether you’ve enabled the recorder to generate audio-level metering data.

Discussion

By default, the recorder doesn’t generate audio-level metering data. Because metering uses computing resources, enable it only if you intend to use it.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/isMeteringEnabled

func (AVAudioRecorder) Pause 

func (a AVAudioRecorder) Pause()

Pauses an audio recording.

Discussion

Call [Record] to resume recording.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/pause()

func (AVAudioRecorder) PeakPowerForChannel 

func (a AVAudioRecorder) PeakPowerForChannel(channelNumber uint) float32

Returns the peak power, in decibels full-scale (dBFS), for an audio channel.

channelNumber: The number of the channel that you want the peak power value for.

Return Value

The audio channel’s current peak power.

Discussion

Before asking the player for its peak power value, you must call [UpdateMeters] to generate the latest data. The returned value ranges from `–160` dBFS, indicating minimum power, to 0 dBFS, indicating maximum power.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/peakPower(forChannel:)

func (AVAudioRecorder) PlayAndRecord 

func (a AVAudioRecorder) PlayAndRecord() objc.ID

The category for recording (input) and playback (output) of audio, such as for a Voice over Internet Protocol (VoIP) app.

See: https://developer.apple.com/documentation/avfaudio/avaudiosession/category-swift.struct/playandrecord

func (AVAudioRecorder) PrepareToRecord 

func (a AVAudioRecorder) PrepareToRecord() bool

Creates an audio file and prepares the system for recording.

Return Value

true if successful; otherwise, false.

Discussion

Calling this method creates an audio file at the URL you used to create the recorder. If a file already exists at that location, this method overwrites it.

Call this method to start recording as quickly as possible upon calling [Record].

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/prepareToRecord()

func (AVAudioRecorder) Record 

func (a AVAudioRecorder) Record() objc.ID

The category for recording audio while also silencing playback audio.

See: https://developer.apple.com/documentation/avfaudio/avaudiosession/category-swift.struct/record

func (AVAudioRecorder) RecordAtTime 

func (a AVAudioRecorder) RecordAtTime(time float64) bool

Records audio starting at a specific time.

time: The time at which to start recording, relative to [DeviceCurrentTime].

Return Value

true if recording starts successfully; otherwise, false.

Discussion

You can call this method on a single recorder, or use it to synchronize the recording of multiple players as shown below.

Calling this method implicitly calls [PrepareToRecord], which creates an audio file and prepares the system for recording.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/record(atTime:)

func (AVAudioRecorder) RecordAtTimeForDuration 

func (a AVAudioRecorder) RecordAtTimeForDuration(time float64, duration float64) bool

Records audio starting at a specific time for the indicated duration.

time: The time at which to start recording, relative to [DeviceCurrentTime].

duration: The duration of time to record, in seconds.

Return Value

true if recording was successful; otherwise, false.

Discussion

The recorder automatically stops recording when it reaches the indicated duration. You may also use it to synchronize recording of multiple recorders as shown below.

Calling this method implicitly calls [PrepareToRecord], which creates an audio file and prepares the system for recording.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/record(atTime:forDuration:)

func (AVAudioRecorder) RecordForDuration 

func (a AVAudioRecorder) RecordForDuration(duration float64) bool

Records audio for the indicated duration of time.

duration: The duration of time to record, in seconds.

Return Value

true if successful; otherwise false.

Discussion

The recorder stops recording when it reaches the indicated duration.

Calling this method implicitly calls [PrepareToRecord], which creates an audio file and prepares the system for recording.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/record(forDuration:)

func (AVAudioRecorder) Recording 

func (a AVAudioRecorder) Recording() bool

A Boolean value that indicates whether the audio recorder is recording.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/isRecording

func (AVAudioRecorder) SetDelegate 

func (a AVAudioRecorder) SetDelegate(value AVAudioRecorderDelegate)

func (AVAudioRecorder) SetMeteringEnabled 

func (a AVAudioRecorder) SetMeteringEnabled(value bool)

func (AVAudioRecorder) Settings 

func (a AVAudioRecorder) Settings() foundation.INSDictionary

The settings that describe the format of the recorded audio.

Discussion

See [InitWithURLSettingsError] for supported keys and values.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/settings

func (AVAudioRecorder) Stop 

func (a AVAudioRecorder) Stop()

Stops recording and closes the audio file.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/stop()

func (AVAudioRecorder) UpdateMeters 

func (a AVAudioRecorder) UpdateMeters()

Refreshes the average and peak power values for all channels of an audio recorder.

Discussion

Call this method to update the level meter data before calling [AveragePowerForChannel] or [PeakPowerForChannel].

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/updateMeters()

func (AVAudioRecorder) Url 

func (a AVAudioRecorder) Url() foundation.INSURL

The URL to which the recorder writes its data.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder/url

type AVAudioRecorderClass 

type AVAudioRecorderClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioRecorderClass 

func GetAVAudioRecorderClass() AVAudioRecorderClass

GetAVAudioRecorderClass returns the class object for AVAudioRecorder.

func (AVAudioRecorderClass) Alloc 

func (ac AVAudioRecorderClass) Alloc() AVAudioRecorder

Alloc allocates memory for a new instance of the class.

func (AVAudioRecorderClass) Class 

func (ac AVAudioRecorderClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioRecorderDelegate 

type AVAudioRecorderDelegate interface {
	objectivec.IObject
}

A protocol that defines the methods to respond to audio recording events and encoding errors.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorderDelegate

type AVAudioRecorderDelegateConfig 

type AVAudioRecorderDelegateConfig struct {

	// Responding to Recording Completion
	// AudioRecorderDidFinishRecordingSuccessfully — Tells the delegate when recording stops or finishes due to reaching its time limit.
	AudioRecorderDidFinishRecordingSuccessfully func(recorder AVAudioRecorder, flag bool)

	// Responding to Audio Encoding Errors
	// AudioRecorderEncodeErrorDidOccurError — Tells the delegate that the audio recorder encountered an encoding error during recording.
	AudioRecorderEncodeErrorDidOccurError func(recorder AVAudioRecorder, error_ foundation.NSError)
}

AVAudioRecorderDelegateConfig holds optional typed callbacks for AVAudioRecorderDelegate methods. Set non-nil fields to register the corresponding Objective-C delegate method. Methods with nil callbacks are not registered, so [NSObject.RespondsToSelector] returns false for them — matching the Objective-C delegate pattern exactly.

See Apple Documentation for protocol details.

type AVAudioRecorderDelegateObject 

type AVAudioRecorderDelegateObject struct {
	objectivec.Object
}

AVAudioRecorderDelegateObject wraps an existing Objective-C object that conforms to the AVAudioRecorderDelegate protocol.

func AVAudioRecorderDelegateObjectFromID 

func AVAudioRecorderDelegateObjectFromID(id objc.ID) AVAudioRecorderDelegateObject

AVAudioRecorderDelegateObjectFromID constructs a AVAudioRecorderDelegateObject from an objc.ID. The object is determined to conform to the protocol at runtime.

func NewAVAudioRecorderDelegate 

func NewAVAudioRecorderDelegate(config AVAudioRecorderDelegateConfig) AVAudioRecorderDelegateObject

NewAVAudioRecorderDelegate creates an Objective-C object implementing the AVAudioRecorderDelegate protocol.

Each call registers a unique Objective-C class containing only the methods set in config. This means [NSObject.RespondsToSelector] works correctly for optional delegate methods — only non-nil callbacks are registered.

The returned AVAudioRecorderDelegateObject satisfies the AVAudioRecorderDelegate interface and can be passed directly to SetDelegate and similar methods.

See Apple Documentation for protocol details.

func (AVAudioRecorderDelegateObject) AudioRecorderDidFinishRecordingSuccessfully 

func (o AVAudioRecorderDelegateObject) AudioRecorderDidFinishRecordingSuccessfully(recorder IAVAudioRecorder, flag bool)

Tells the delegate when recording stops or finishes due to reaching its time limit.

recorder: The audio recorder that finished recording.

flag: A Boolean value that indicates whether the recording stopped successfully.

Discussion

The system doesn’t call this method if the recorder stops due to an interruption.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorderDelegate/audioRecorderDidFinishRecording(_:successfully:)

func (AVAudioRecorderDelegateObject) AudioRecorderEncodeErrorDidOccurError 

func (o AVAudioRecorderDelegateObject) AudioRecorderEncodeErrorDidOccurError(recorder IAVAudioRecorder, error_ foundation.INSError)

Tells the delegate that the audio recorder encountered an encoding error during recording.

recorder: The audio recorder that encountered the encoding error.

error: An object that provides the details of the encoding error.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorderDelegate/audioRecorderEncodeErrorDidOccur(_:error:)

func (AVAudioRecorderDelegateObject) BaseObject 

func (o AVAudioRecorderDelegateObject) BaseObject() objectivec.Object

type AVAudioRoutingArbiter 

type AVAudioRoutingArbiter struct {
	objectivec.Object
}

An object for configuring macOS apps to participate in AirPods Automatic Switching.

Overview

AirPods Automatic Switching is a feature of Apple operating systems that intelligently connects wireless headphones to the most appropriate audio device in a multidevice environment. For example, if a user plays a movie on iPad, and then locks the device and starts playing music on iPhone, the system automatically switches the source audio device from iPad to iPhone.

iOS apps automatically participate in AirPods Automatic Switching. To enable your macOS app to participate in this behavior, use AVAudioRoutingArbiter to indicate when your app starts and finishes playing or recording audio. For example, a Voice over IP (VoIP) app might request arbitration before starting a call, and when the arbitration completes, begin the VoIP session. Likewise, when the call ends, the app would end the VoIP session and leave arbitration.

Participating in AirPods Automatic Switching

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRoutingArbiter

func AVAudioRoutingArbiterFromID 

func AVAudioRoutingArbiterFromID(id objc.ID) AVAudioRoutingArbiter

AVAudioRoutingArbiterFromID constructs a AVAudioRoutingArbiter from an objc.ID.

An object for configuring macOS apps to participate in AirPods Automatic Switching.

func NewAVAudioRoutingArbiter 

func NewAVAudioRoutingArbiter() AVAudioRoutingArbiter

NewAVAudioRoutingArbiter creates a new AVAudioRoutingArbiter instance.

func (AVAudioRoutingArbiter) Autorelease 

func (a AVAudioRoutingArbiter) Autorelease() AVAudioRoutingArbiter

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioRoutingArbiter) BeginArbitrationWithCategory 

func (a AVAudioRoutingArbiter) BeginArbitrationWithCategory(ctx context.Context, category AVAudioRoutingArbitrationCategory) (bool, error)

BeginArbitrationWithCategory is a synchronous wrapper around AVAudioRoutingArbiter.BeginArbitrationWithCategoryCompletionHandler. It blocks until the completion handler fires or the context is cancelled.

func (AVAudioRoutingArbiter) BeginArbitrationWithCategoryCompletionHandler 

func (a AVAudioRoutingArbiter) BeginArbitrationWithCategoryCompletionHandler(category AVAudioRoutingArbitrationCategory, handler BoolErrorHandler)

Begins routing arbitration to take ownership of a nearby Bluetooth audio route.

category: A category that describes how the app uses audio.

handler: A completion handler the system calls asynchronously when the system completes audio routing arbitration. This closure takes the following parameters:

defaultDeviceChanged: A Boolean value that indicates whether the system switched the AirPods to the macOS device. error: An error object that indicates why the request failed, or nil if the request succeeded.

Discussion

Call this method to tell the operating system to arbitrate with nearby Apple devices to take ownership of a supported Bluetooth audio device. When arbitration completes, the system calls the completion handler, passing a Boolean that indicates whether the audio device changed. In either case, begin using audio as normal.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRoutingArbiter/begin(category:completionHandler:)

func (AVAudioRoutingArbiter) Init 

func (a AVAudioRoutingArbiter) Init() AVAudioRoutingArbiter

Init initializes the instance.

func (AVAudioRoutingArbiter) LeaveArbitration 

func (a AVAudioRoutingArbiter) LeaveArbitration()

Stops an app’s participation in audio routing arbitration.

Discussion

Configure your app to notify the system when the app stops using audio for an undetermined duration. For example, for a Voice over IP (VoIP) app, call this method when the VoIP call ends. Calling this method allows the system to make an informed decision when multiple Apple devices are trying to take ownership of a Bluetooth audio route.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRoutingArbiter/leave()

type AVAudioRoutingArbiterClass 

type AVAudioRoutingArbiterClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioRoutingArbiterClass 

func GetAVAudioRoutingArbiterClass() AVAudioRoutingArbiterClass

GetAVAudioRoutingArbiterClass returns the class object for AVAudioRoutingArbiter.

func (AVAudioRoutingArbiterClass) Alloc 

func (ac AVAudioRoutingArbiterClass) Alloc() AVAudioRoutingArbiter

Alloc allocates memory for a new instance of the class.

func (AVAudioRoutingArbiterClass) Class 

func (ac AVAudioRoutingArbiterClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

func (AVAudioRoutingArbiterClass) SharedRoutingArbiter 

func (_AVAudioRoutingArbiterClass AVAudioRoutingArbiterClass) SharedRoutingArbiter() AVAudioRoutingArbiter

The shared routing arbiter object.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRoutingArbiter/shared

type AVAudioRoutingArbitrationCategory 

type AVAudioRoutingArbitrationCategory int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRoutingArbiter/Category 

const (
	// AVAudioRoutingArbitrationCategoryPlayAndRecord: The app plays and records audio.
	AVAudioRoutingArbitrationCategoryPlayAndRecord AVAudioRoutingArbitrationCategory = 1
	// AVAudioRoutingArbitrationCategoryPlayAndRecordVoice: The app uses Voice over IP (VoIP).
	AVAudioRoutingArbitrationCategoryPlayAndRecordVoice AVAudioRoutingArbitrationCategory = 2
	// AVAudioRoutingArbitrationCategoryPlayback: The app plays audio.
	AVAudioRoutingArbitrationCategoryPlayback AVAudioRoutingArbitrationCategory = 0
)

func (AVAudioRoutingArbitrationCategory) String 

func (e AVAudioRoutingArbitrationCategory) String() string

type AVAudioSequencer 

type AVAudioSequencer struct {
	objectivec.Object
}

An object that plays audio from a collection of MIDI events the system organizes into music tracks.

Creating an Audio Sequencer

Writing to a MIDI File

Handling Music Tracks

Managing Sequence Load Options

Operating an Audio Sequencer

Managing Time Stamps

Handling Beat Range

Setting the User Callback

Getting Sequence Properties

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer

func AVAudioSequencerFromID 

func AVAudioSequencerFromID(id objc.ID) AVAudioSequencer

AVAudioSequencerFromID constructs a AVAudioSequencer from an objc.ID.

An object that plays audio from a collection of MIDI events the system organizes into music tracks.

func NewAVAudioSequencer 

func NewAVAudioSequencer() AVAudioSequencer

NewAVAudioSequencer creates a new AVAudioSequencer instance.

func NewAudioSequencerWithAudioEngine 

func NewAudioSequencerWithAudioEngine(engine IAVAudioEngine) AVAudioSequencer

Creates an audio sequencer that the framework attaches to an audio engine instance.

engine: The engine to attach to.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/init(audioEngine:)

func (AVAudioSequencer) AVMusicTimeStampEndOfTrack 

func (a AVAudioSequencer) AVMusicTimeStampEndOfTrack() float64

A timestamp you use to access all events in a music track through a beat range.

See: https://developer.apple.com/documentation/avfaudio/avmusictimestampendoftrack

func (AVAudioSequencer) Autorelease 

func (a AVAudioSequencer) Autorelease() AVAudioSequencer

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioSequencer) BeatsForHostTimeError 

func (a AVAudioSequencer) BeatsForHostTimeError(inHostTime uint64) (AVMusicTimeStamp, error)

Gets the beat the system plays at the specified host time.

inHostTime: The host time for the beat position.

outError: On exit, if an error occurs, a description of the error.

Discussion

This call is valid when the player is in a playing state. It returns `0` with an error, otherwise, or if the starting position of the player is after the specified host time. This method uses the sequence’s tempo map to retrieve a beat time from the specified host time.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/beats(forHostTime:error:)

func (AVAudioSequencer) BeatsForSeconds 

func (a AVAudioSequencer) BeatsForSeconds(seconds float64) AVMusicTimeStamp

Gets the beat position (timestamp) for the specified time in the track.

seconds: The time to retrieve the beat timestamp for.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/beats(forSeconds:)

func (AVAudioSequencer) CreateAndAppendTrack 

func (a AVAudioSequencer) CreateAndAppendTrack() IAVMusicTrack

Creates a new music track and appends it to the sequencer’s list.

Return Value

A new music track appended to the sequencer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/createAndAppendTrack()

func (AVAudioSequencer) CurrentPositionInBeats 

func (a AVAudioSequencer) CurrentPositionInBeats() float64

The current playback position, in beats.

Discussion

Setting this property positions the sequencer’s player to the specified beat. You can update this property while the player is in a playing state, in which case, playback resumes at the new position.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/currentPositionInBeats

func (AVAudioSequencer) CurrentPositionInSeconds 

func (a AVAudioSequencer) CurrentPositionInSeconds() float64

The current playback position, in seconds.

Discussion

This property positions the sequencer’s player to the specified time. You can update this property while the player is in a playing state, in which case, playback resumes at the new position.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/currentPositionInSeconds

func (AVAudioSequencer) DataWithSMPTEResolutionError 

func (a AVAudioSequencer) DataWithSMPTEResolutionError(SMPTEResolution int) (foundation.INSData, error)

Gets a data object that contains the events from the sequence.

SMPTEResolution: The relationship between tick and quarter note for saving to a Standard MIDI File. Pass `0` to use the default.

outError: On exit, if an error occurs, a description of the error.

Discussion

The client controls the lifetime of the data value this method returns.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/data(withSMPTEResolution:error:)

func (AVAudioSequencer) HostTimeForBeatsError 

func (a AVAudioSequencer) HostTimeForBeatsError(inBeats AVMusicTimeStamp) (uint64, error)

Gets the host time the sequence plays at the specified position.

inBeats: The timestamp for the beat position.

outError: On exit, if an error occurs, a description of the error.

Discussion

This call is valid when the player is in a playing state. It returns `0` with an error, otherwise, or if the starting position of the player is after the specified beat. The method uses the sequence’s tempo map to translate a beat time from the starting time and the beat of the player.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/hostTime(forBeats:error:)

func (AVAudioSequencer) Init 

func (a AVAudioSequencer) Init() AVAudioSequencer

Init initializes the instance.

func (AVAudioSequencer) InitWithAudioEngine 

func (a AVAudioSequencer) InitWithAudioEngine(engine IAVAudioEngine) AVAudioSequencer

Creates an audio sequencer that the framework attaches to an audio engine instance.

engine: The engine to attach to.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/init(audioEngine:)

func (AVAudioSequencer) LoadFromDataOptionsError 

func (a AVAudioSequencer) LoadFromDataOptionsError(data foundation.INSData, options AVMusicSequenceLoadOptions) (bool, error)

Parses the data and adds its events to the sequence.

data: The data to load from.

options: Determines how the contents map to the tracks inside the sequence.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/load(from:options:)-8o58w

func (AVAudioSequencer) LoadFromURLOptionsError 

func (a AVAudioSequencer) LoadFromURLOptionsError(fileURL foundation.INSURL, options AVMusicSequenceLoadOptions) (bool, error)

Loads the file the URL references and adds the events to the sequence.

fileURL: The URL to the file.

options: Determines how the contents map to the tracks inside the sequence.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/load(from:options:)-9kb6m

func (AVAudioSequencer) Playing 

func (a AVAudioSequencer) Playing() bool

A Boolean value that indicates whether the sequencer’s player is in a playing state.

Discussion

This value returns true if the sequencer’s player is in a started state. The framework considers it to be playing until it explicitly stops, including when playing past the end of the events in a sequence.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/isPlaying

func (AVAudioSequencer) PrepareToPlay 

func (a AVAudioSequencer) PrepareToPlay()

Gets ready to play the sequence by prerolling all events.

Discussion

The framework invokes this method automatically on play if you don’t call it, but it may delay startup.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/prepareToPlay()

func (AVAudioSequencer) Rate 

func (a AVAudioSequencer) Rate() float32

The playback rate of the sequencer’s player.

Discussion

The default playback rate is `1.0`, and must be greater than `0.0`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/rate

func (AVAudioSequencer) RemoveTrack 

func (a AVAudioSequencer) RemoveTrack(track IAVMusicTrack) bool

Removes the music track from the sequencer.

track: The music track to remove.

Return Value

A Boolean value that indicates whether the call succeeds.

Discussion

This method doesn’t destroy the method track since you can reuse it.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/removeTrack(_:)

func (AVAudioSequencer) ReverseEvents 

func (a AVAudioSequencer) ReverseEvents()

Reverses the order of all events in all music tracks, including the tempo track.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/reverseEvents()

func (AVAudioSequencer) SecondsForBeats 

func (a AVAudioSequencer) SecondsForBeats(beats AVMusicTimeStamp) float64

Gets the time for the specified beat position (timestamp) in the track, in seconds.

beats: The timestamp for the beat position.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/seconds(forBeats:)

func (AVAudioSequencer) SetAVMusicTimeStampEndOfTrack 

func (a AVAudioSequencer) SetAVMusicTimeStampEndOfTrack(value float64)

func (AVAudioSequencer) SetCurrentPositionInBeats 

func (a AVAudioSequencer) SetCurrentPositionInBeats(value float64)

func (AVAudioSequencer) SetCurrentPositionInSeconds 

func (a AVAudioSequencer) SetCurrentPositionInSeconds(value float64)

func (AVAudioSequencer) SetRate 

func (a AVAudioSequencer) SetRate(value float32)

func (AVAudioSequencer) SetUserCallback 

func (a AVAudioSequencer) SetUserCallback(userCallback AVAudioSequencerUserCallback)

Adds a callback that the sequencer calls each time it encounters a user event during playback.

userCallback: The user callback that the system calls.

Discussion

The system calls the same callback for events that occur on any track in the sequencer. Set the callback to `nil` to disable it.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/setUserCallback(_:)

func (AVAudioSequencer) StartAndReturnError 

func (a AVAudioSequencer) StartAndReturnError() (bool, error)

Starts the sequencer’s player.

Discussion

If you don’t call [PrepareToPlay], the framework calls it and then starts the player.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/start()

func (AVAudioSequencer) Stop 

func (a AVAudioSequencer) Stop()

Stops the sequencer’s player.

Discussion

Stopping the player leaves it in an unprerolled state, but stores the playback position so that a subsequent call to [StartAndReturnError] resumes where it stops. This action doesn’t stop an audio engine you associate with it.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/stop()

func (AVAudioSequencer) TempoTrack 

func (a AVAudioSequencer) TempoTrack() IAVMusicTrack

The track that contains tempo information about the sequence.

Discussion

Each sequence has a single tempo track. The framework places all tempo events into this track along with other appropriate events, such as the time signature from a MIDI file.

You can edit the tempo track like any other track. The framework ignores nontempo events in the track.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/tempoTrack

func (AVAudioSequencer) Tracks 

func (a AVAudioSequencer) Tracks() []AVMusicTrack

An array that contains all the tracks in the sequence.

Discussion

The track indices start at `0`, and don’t include the tempo track.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/tracks

func (AVAudioSequencer) UserInfo 

func (a AVAudioSequencer) UserInfo() foundation.INSDictionary

A dictionary that contains metadata from a sequence.

Discussion

This property contains one or more of the values from AVAudioSequencerInfoDictionaryKey.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/userInfo

func (AVAudioSequencer) WriteToURLSMPTEResolutionReplaceExistingError 

func (a AVAudioSequencer) WriteToURLSMPTEResolutionReplaceExistingError(fileURL foundation.INSURL, resolution int, replace bool) (bool, error)

Creates and writes a MIDI file from the events in the sequence.

fileURL: The URL of the file you want to write to.

resolution: The relationship between tick and quarter note for saving to a Standard MIDI File. Passing zero uses the default value set using the tempo track.

replace: When `true`, the framework overwrites an existing file at `fileURL`. Otherwise, the call fails with a permission error if a file at the specified path exists.

Discussion

The framework writes only MIDI events when writing to the MIDI file. MIDI files are normally beat-based, but can also have an SMPTE (or real-time, rather than beat time) representation. The relationship between tick and quarter note for saving to a Standard MIDI File is the current value for the tempo track.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/write(to:smpteResolution:replaceExisting:)

type AVAudioSequencerClass 

type AVAudioSequencerClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioSequencerClass 

func GetAVAudioSequencerClass() AVAudioSequencerClass

GetAVAudioSequencerClass returns the class object for AVAudioSequencer.

func (AVAudioSequencerClass) Alloc 

func (ac AVAudioSequencerClass) Alloc() AVAudioSequencer

Alloc allocates memory for a new instance of the class.

func (AVAudioSequencerClass) Class 

func (ac AVAudioSequencerClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioSequencerInfoDictionaryKey 

type AVAudioSequencerInfoDictionaryKey = string

AVAudioSequencerInfoDictionaryKey is constants that defines metadata keys for a sequencer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey

type AVAudioSequencerUserCallback 

type AVAudioSequencerUserCallback = func(AVMusicTrack, foundation.NSData, float64)

AVAudioSequencerUserCallback is a callback the sequencer calls asynchronously during playback when it encounters a user event.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencerUserCallback

type AVAudioSessionActivationOptions 

type AVAudioSessionActivationOptions uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSessionActivationOptions 

const (
	// AVAudioSessionActivationOptionNone: A value that indicates the system should activate the audio session with no options.
	AVAudioSessionActivationOptionNone AVAudioSessionActivationOptions = 0
)

func (AVAudioSessionActivationOptions) String 

func (e AVAudioSessionActivationOptions) String() string

type AVAudioSessionAnchoringStrategy 

type AVAudioSessionAnchoringStrategy int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSessionAnchoringStrategy 

const (
	AVAudioSessionAnchoringStrategyAutomatic AVAudioSessionAnchoringStrategy = 0
	AVAudioSessionAnchoringStrategyFront     AVAudioSessionAnchoringStrategy = 0
	AVAudioSessionAnchoringStrategyScene     AVAudioSessionAnchoringStrategy = 0
)

func (AVAudioSessionAnchoringStrategy) String 

func (e AVAudioSessionAnchoringStrategy) String() string

type AVAudioSessionCapability 

type AVAudioSessionCapability struct {
	objectivec.Object
}

Describes whether a specific capability is supported and if that capability is currently enabled

Inspecting a capability

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSessionCapability

func AVAudioSessionCapabilityFromID 

func AVAudioSessionCapabilityFromID(id objc.ID) AVAudioSessionCapability

AVAudioSessionCapabilityFromID constructs a AVAudioSessionCapability from an objc.ID.

Describes whether a specific capability is supported and if that capability is currently enabled

func NewAVAudioSessionCapability 

func NewAVAudioSessionCapability() AVAudioSessionCapability

NewAVAudioSessionCapability creates a new AVAudioSessionCapability instance.

func (AVAudioSessionCapability) Autorelease 

func (a AVAudioSessionCapability) Autorelease() AVAudioSessionCapability

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioSessionCapability) BluetoothMicrophoneExtension 

func (a AVAudioSessionCapability) BluetoothMicrophoneExtension() objc.ID

An optional port extension that describes capabilities relevant to Bluetooth microphone ports.

See: https://developer.apple.com/documentation/avfaudio/avaudiosessionportdescription/bluetoothmicrophoneextension

func (AVAudioSessionCapability) Enabled 

func (a AVAudioSessionCapability) Enabled() bool

A Boolean value that indicates whether the capability is enabled.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSessionCapability/isEnabled

func (AVAudioSessionCapability) Init 

func (a AVAudioSessionCapability) Init() AVAudioSessionCapability

Init initializes the instance.

func (AVAudioSessionCapability) SetBluetoothMicrophoneExtension 

func (a AVAudioSessionCapability) SetBluetoothMicrophoneExtension(value objc.ID)

func (AVAudioSessionCapability) Supported 

func (a AVAudioSessionCapability) Supported() bool

A Boolean value that indicates whether the capability is supported.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSessionCapability/isSupported

type AVAudioSessionCapabilityClass 

type AVAudioSessionCapabilityClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioSessionCapabilityClass 

func GetAVAudioSessionCapabilityClass() AVAudioSessionCapabilityClass

GetAVAudioSessionCapabilityClass returns the class object for AVAudioSessionCapability.

func (AVAudioSessionCapabilityClass) Alloc 

func (ac AVAudioSessionCapabilityClass) Alloc() AVAudioSessionCapability

Alloc allocates memory for a new instance of the class.

func (AVAudioSessionCapabilityClass) Class 

func (ac AVAudioSessionCapabilityClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioSessionCategoryOptions 

type AVAudioSessionCategoryOptions uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/CategoryOptions-swift.struct 

const (
	// AVAudioSessionCategoryOptionAllowAirPlay: An option that determines whether you can stream audio from this session to AirPlay devices.
	AVAudioSessionCategoryOptionAllowAirPlay AVAudioSessionCategoryOptions = 64
	// AVAudioSessionCategoryOptionAllowBluetoothA2DP: An option that determines whether you can stream audio from this session to Bluetooth devices that support the Advanced Audio Distribution Profile (A2DP).
	AVAudioSessionCategoryOptionAllowBluetoothA2DP AVAudioSessionCategoryOptions = 32
	// AVAudioSessionCategoryOptionAllowBluetoothHFP: An option that makes Bluetooth Hands-Free Profile (HFP) devices available for audio input.
	AVAudioSessionCategoryOptionAllowBluetoothHFP AVAudioSessionCategoryOptions = 4
	// AVAudioSessionCategoryOptionBluetoothHighQualityRecording: An option that indicates to enable high-quality audio for input and output routes.
	AVAudioSessionCategoryOptionBluetoothHighQualityRecording AVAudioSessionCategoryOptions = 524288
	// AVAudioSessionCategoryOptionDefaultToSpeaker: An option that determines whether audio from the session defaults to the built-in speaker instead of the receiver.
	AVAudioSessionCategoryOptionDefaultToSpeaker AVAudioSessionCategoryOptions = 8
	// AVAudioSessionCategoryOptionDuckOthers: An option that reduces the volume of other audio sessions while audio from this session plays.
	AVAudioSessionCategoryOptionDuckOthers AVAudioSessionCategoryOptions = 2
	// AVAudioSessionCategoryOptionFarFieldInput: This option should be used if a session prefers to use FarFieldInput when available.
	AVAudioSessionCategoryOptionFarFieldInput AVAudioSessionCategoryOptions = 262144
	// AVAudioSessionCategoryOptionInterruptSpokenAudioAndMixWithOthers: An option that determines whether to pause spoken audio content from other sessions when your app plays its audio.
	AVAudioSessionCategoryOptionInterruptSpokenAudioAndMixWithOthers AVAudioSessionCategoryOptions = 17
	// AVAudioSessionCategoryOptionMixWithOthers: An option that indicates whether audio from this session mixes with audio from active sessions in other audio apps.
	AVAudioSessionCategoryOptionMixWithOthers AVAudioSessionCategoryOptions = 1
	// AVAudioSessionCategoryOptionOverrideMutedMicrophoneInterruption: An option that indicates whether the system interrupts the audio session when it mutes the built-in microphone.
	AVAudioSessionCategoryOptionOverrideMutedMicrophoneInterruption AVAudioSessionCategoryOptions = 128
	// Deprecated.
	AVAudioSessionCategoryOptionAllowBluetooth AVAudioSessionCategoryOptions = 4
)

func (AVAudioSessionCategoryOptions) String 

func (e AVAudioSessionCategoryOptions) String() string

type AVAudioSessionErrorCode 

type AVAudioSessionErrorCode int
const (
	AVAudioSessionErrorCodeBadParam              AVAudioSessionErrorCode = -50
	AVAudioSessionErrorCodeCannotInterruptOthers AVAudioSessionErrorCode = '!'<<24 | 'i'<<16 | 'n'<<8 | 't' // '!int'
	AVAudioSessionErrorCodeCannotStartPlaying    AVAudioSessionErrorCode = '!'<<24 | 'p'<<16 | 'l'<<8 | 'a' // '!pla'
	AVAudioSessionErrorCodeCannotStartRecording  AVAudioSessionErrorCode = '!'<<24 | 'r'<<16 | 'e'<<8 | 'c' // '!rec'
	AVAudioSessionErrorCodeExpiredSession        AVAudioSessionErrorCode = '!'<<24 | 's'<<16 | 'e'<<8 | 's' // '!ses'
	AVAudioSessionErrorCodeIncompatibleCategory  AVAudioSessionErrorCode = '!'<<24 | 'c'<<16 | 'a'<<8 | 't' // '!cat'
	AVAudioSessionErrorCodeInsufficientPriority  AVAudioSessionErrorCode = '!'<<24 | 'p'<<16 | 'r'<<8 | 'i' // '!pri'
	AVAudioSessionErrorCodeIsBusy                AVAudioSessionErrorCode = '!'<<24 | 'a'<<16 | 'c'<<8 | 't' // '!act'
	AVAudioSessionErrorCodeMediaServicesFailed   AVAudioSessionErrorCode = 'm'<<24 | 's'<<16 | 'r'<<8 | 'v' // 'msrv'
	AVAudioSessionErrorCodeMissingEntitlement    AVAudioSessionErrorCode = 'e'<<24 | 'n'<<16 | 't'<<8 | '?' // 'ent?'
	AVAudioSessionErrorCodeNone                  AVAudioSessionErrorCode = 0
	AVAudioSessionErrorCodeResourceNotAvailable  AVAudioSessionErrorCode = '!'<<24 | 'r'<<16 | 'e'<<8 | 's' // '!res'
	AVAudioSessionErrorCodeSessionNotActive      AVAudioSessionErrorCode = 'i'<<24 | 'n'<<16 | 'a'<<8 | 'c' // 'inac'
	AVAudioSessionErrorCodeSiriIsRecording       AVAudioSessionErrorCode = 's'<<24 | 'i'<<16 | 'r'<<8 | 'i' // 'siri'
	AVAudioSessionErrorCodeUnspecified           AVAudioSessionErrorCode = 'w'<<24 | 'h'<<16 | 'a'<<8 | 't' // 'what'
)

func (AVAudioSessionErrorCode) String 

func (e AVAudioSessionErrorCode) String() string

type AVAudioSessionIOType 

type AVAudioSessionIOType uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/IOType 

const (
	// AVAudioSessionIOTypeAggregated: An I/O type that indicates if audio input and output should be presented in the same realtime I/O callback.
	AVAudioSessionIOTypeAggregated AVAudioSessionIOType = 1
	// AVAudioSessionIOTypeNotSpecified: The default audio session I/O type.
	AVAudioSessionIOTypeNotSpecified AVAudioSessionIOType = 0
)

func (AVAudioSessionIOType) String 

func (e AVAudioSessionIOType) String() string

type AVAudioSessionInterruptionFlags added in v0.5.1 

type AVAudioSessionInterruptionFlags uint
const (
	// Deprecated.
	AVAudioSessionInterruptionFlags_ShouldResume AVAudioSessionInterruptionFlags = 1
)

func (AVAudioSessionInterruptionFlags) String added in v0.5.1 

func (e AVAudioSessionInterruptionFlags) String() string

type AVAudioSessionInterruptionOptions 

type AVAudioSessionInterruptionOptions uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/InterruptionOptions 

const (
	// AVAudioSessionInterruptionOptionShouldResume: An option that indicates the interruption by another audio session has ended and the app can resume its audio session.
	AVAudioSessionInterruptionOptionShouldResume AVAudioSessionInterruptionOptions = 1
)

func (AVAudioSessionInterruptionOptions) String 

func (e AVAudioSessionInterruptionOptions) String() string

type AVAudioSessionInterruptionReason 

type AVAudioSessionInterruptionReason uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/InterruptionReason 

const (
	// AVAudioSessionInterruptionReasonBuiltInMicMuted: The system interrupts the audio session when the device mutes the built-in microphone.
	AVAudioSessionInterruptionReasonBuiltInMicMuted AVAudioSessionInterruptionReason = 2
	// AVAudioSessionInterruptionReasonDefault: The system interrupts this audio session when it activates another.
	AVAudioSessionInterruptionReasonDefault               AVAudioSessionInterruptionReason = 0
	AVAudioSessionInterruptionReasonDeviceUnauthenticated AVAudioSessionInterruptionReason = 0
	// AVAudioSessionInterruptionReasonRouteDisconnected: The system interrupts the audio session due to a disconnection of an audio route.
	AVAudioSessionInterruptionReasonRouteDisconnected AVAudioSessionInterruptionReason = 4
	// AVAudioSessionInterruptionReasonSceneWasBackgrounded: The system backgrounds the scene and interrupts the audio session.
	AVAudioSessionInterruptionReasonSceneWasBackgrounded AVAudioSessionInterruptionReason = 0
	// Deprecated.
	AVAudioSessionInterruptionReasonAppWasSuspended AVAudioSessionInterruptionReason = 1
)

func (AVAudioSessionInterruptionReason) String 

func (e AVAudioSessionInterruptionReason) String() string

type AVAudioSessionInterruptionType 

type AVAudioSessionInterruptionType uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/InterruptionType 

const (
	// AVAudioSessionInterruptionTypeBegan: A type that indicates that the operating system began interrupting the audio session.
	AVAudioSessionInterruptionTypeBegan AVAudioSessionInterruptionType = 1
	// AVAudioSessionInterruptionTypeEnded: A type that indicates that the operating system ended interrupting the audio session.
	AVAudioSessionInterruptionTypeEnded AVAudioSessionInterruptionType = 0
)

func (AVAudioSessionInterruptionType) String 

func (e AVAudioSessionInterruptionType) String() string

type AVAudioSessionMicrophoneInjectionMode 

type AVAudioSessionMicrophoneInjectionMode int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/MicrophoneInjectionMode 

const (
	// AVAudioSessionMicrophoneInjectionModeNone: A mode that indicates not to use spoken audio injection.
	AVAudioSessionMicrophoneInjectionModeNone AVAudioSessionMicrophoneInjectionMode = 0
	// AVAudioSessionMicrophoneInjectionModeSpokenAudio: A mode that indicates to inject spoken audio, like synthesized speech, along with microphone audio.
	AVAudioSessionMicrophoneInjectionModeSpokenAudio AVAudioSessionMicrophoneInjectionMode = 1
)

func (AVAudioSessionMicrophoneInjectionMode) String 

func (e AVAudioSessionMicrophoneInjectionMode) String() string

type AVAudioSessionPortOverride 

type AVAudioSessionPortOverride uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/PortOverride 

const (
	// AVAudioSessionPortOverrideNone: A value that indicates not to override the output audio port.
	AVAudioSessionPortOverrideNone AVAudioSessionPortOverride = 0
	// AVAudioSessionPortOverrideSpeaker: A value that indicates to override the current inputs and outputs, and route audio to the built-in speaker and microphone.
	AVAudioSessionPortOverrideSpeaker AVAudioSessionPortOverride = 's'<<24 | 'p'<<16 | 'k'<<8 | 'r' // 'spkr'
)

func (AVAudioSessionPortOverride) String 

func (e AVAudioSessionPortOverride) String() string

type AVAudioSessionPromptStyle 

type AVAudioSessionPromptStyle uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/PromptStyle-swift.enum 

const (
	// AVAudioSessionPromptStyleNone: Your app shouldn’t issue prompts at this time.
	AVAudioSessionPromptStyleNone AVAudioSessionPromptStyle = 'n'<<24 | 'o'<<16 | 'n'<<8 | 'e' // 'none'
	// AVAudioSessionPromptStyleNormal: Your app may use long, verbal prompts.
	AVAudioSessionPromptStyleNormal AVAudioSessionPromptStyle = 'n'<<24 | 'r'<<16 | 'm'<<8 | 'l' // 'nrml'
	// AVAudioSessionPromptStyleShort: Your app should issue short, nonverbal prompts.
	AVAudioSessionPromptStyleShort AVAudioSessionPromptStyle = 's'<<24 | 'h'<<16 | 'r'<<8 | 't' // 'shrt'
)

func (AVAudioSessionPromptStyle) String 

func (e AVAudioSessionPromptStyle) String() string

type AVAudioSessionRecordPermission 

type AVAudioSessionRecordPermission uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/RecordPermission-swift.enum 

const (
	// Deprecated.
	AVAudioSessionRecordPermissionDenied AVAudioSessionRecordPermission = 'd'<<24 | 'e'<<16 | 'n'<<8 | 'y' // 'deny'
	// Deprecated.
	AVAudioSessionRecordPermissionGranted AVAudioSessionRecordPermission = 'g'<<24 | 'r'<<16 | 'n'<<8 | 't' // 'grnt'
	// Deprecated.
	AVAudioSessionRecordPermissionUndetermined AVAudioSessionRecordPermission = 'u'<<24 | 'n'<<16 | 'd'<<8 | 't' // 'undt'
)

func (AVAudioSessionRecordPermission) String 

func (e AVAudioSessionRecordPermission) String() string

type AVAudioSessionRenderingMode 

type AVAudioSessionRenderingMode int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/RenderingMode-swift.enum 

const (
	// AVAudioSessionRenderingModeDolbyAtmos: A mode that represents Dolby Atmos.
	AVAudioSessionRenderingModeDolbyAtmos AVAudioSessionRenderingMode = 5
	// AVAudioSessionRenderingModeDolbyAudio: A mode that represents Dolby audio.
	AVAudioSessionRenderingModeDolbyAudio AVAudioSessionRenderingMode = 4
	// AVAudioSessionRenderingModeMonoStereo: A mode that represents non multi-channel audio.
	AVAudioSessionRenderingModeMonoStereo AVAudioSessionRenderingMode = 1
	// AVAudioSessionRenderingModeNotApplicable: A mode that represents there’s no asset in a loading or playing state.
	AVAudioSessionRenderingModeNotApplicable AVAudioSessionRenderingMode = 0
	// AVAudioSessionRenderingModeSpatialAudio: A mode that represents a fallback for when hardware capabilities don’t support Dolby.
	AVAudioSessionRenderingModeSpatialAudio AVAudioSessionRenderingMode = 3
	// AVAudioSessionRenderingModeSurround: A mode that represents general multi-channel audio.
	AVAudioSessionRenderingModeSurround AVAudioSessionRenderingMode = 2
)

func (AVAudioSessionRenderingMode) String 

func (e AVAudioSessionRenderingMode) String() string

type AVAudioSessionRouteChangeReason 

type AVAudioSessionRouteChangeReason uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/RouteChangeReason 

const (
	// AVAudioSessionRouteChangeReasonCategoryChange: A value that indicates that the category of the session object changed.
	AVAudioSessionRouteChangeReasonCategoryChange AVAudioSessionRouteChangeReason = 3
	// AVAudioSessionRouteChangeReasonNewDeviceAvailable: A value that indicates a user action, such as plugging in a headset, has made a preferred audio route available.
	AVAudioSessionRouteChangeReasonNewDeviceAvailable AVAudioSessionRouteChangeReason = 1
	// AVAudioSessionRouteChangeReasonNoSuitableRouteForCategory: A value that indicates that the route changed because no suitable route is now available for the specified category.
	AVAudioSessionRouteChangeReasonNoSuitableRouteForCategory AVAudioSessionRouteChangeReason = 7
	// AVAudioSessionRouteChangeReasonOldDeviceUnavailable: A value that indicates that the previous audio output path is no longer available.
	AVAudioSessionRouteChangeReasonOldDeviceUnavailable AVAudioSessionRouteChangeReason = 2
	// AVAudioSessionRouteChangeReasonOverride: A value that indicates that the output route was overridden by the app.
	AVAudioSessionRouteChangeReasonOverride AVAudioSessionRouteChangeReason = 4
	// AVAudioSessionRouteChangeReasonRouteConfigurationChange: A value that indicates that the configuration for a set of I/O ports has changed.
	AVAudioSessionRouteChangeReasonRouteConfigurationChange AVAudioSessionRouteChangeReason = 8
	// AVAudioSessionRouteChangeReasonUnknown: A value that indicates the reason for the change is unknown.
	AVAudioSessionRouteChangeReasonUnknown AVAudioSessionRouteChangeReason = 0
	// AVAudioSessionRouteChangeReasonWakeFromSleep: A value that indicates that the route changed when the device woke up from sleep.
	AVAudioSessionRouteChangeReasonWakeFromSleep AVAudioSessionRouteChangeReason = 6
)

func (AVAudioSessionRouteChangeReason) String 

func (e AVAudioSessionRouteChangeReason) String() string

type AVAudioSessionRouteSelection 

type AVAudioSessionRouteSelection int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/RouteSelection

type AVAudioSessionRouteSharingPolicy 

type AVAudioSessionRouteSharingPolicy uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/RouteSharingPolicy-swift.enum 

const (
	// AVAudioSessionRouteSharingPolicyDefault: A policy that follows standard rules for routing audio output.
	AVAudioSessionRouteSharingPolicyDefault AVAudioSessionRouteSharingPolicy = 0
	// AVAudioSessionRouteSharingPolicyIndependent: A policy in which the route picker UI directs videos to a wireless route.
	AVAudioSessionRouteSharingPolicyIndependent AVAudioSessionRouteSharingPolicy = 2
	// AVAudioSessionRouteSharingPolicyLongFormAudio: A policy that routes output to the shared long-form audio output.
	AVAudioSessionRouteSharingPolicyLongFormAudio AVAudioSessionRouteSharingPolicy = 1
	// AVAudioSessionRouteSharingPolicyLongFormVideo: A policy that routes output to the shared long-form video output.
	AVAudioSessionRouteSharingPolicyLongFormVideo AVAudioSessionRouteSharingPolicy = 3
	// Deprecated.
	AVAudioSessionRouteSharingPolicyLongForm AVAudioSessionRouteSharingPolicy = 1
)

func (AVAudioSessionRouteSharingPolicy) String 

func (e AVAudioSessionRouteSharingPolicy) String() string

type AVAudioSessionSetActiveFlags added in v0.5.1 

type AVAudioSessionSetActiveFlags uint
const (
	// Deprecated.
	AVAudioSessionSetActiveFlags_NotifyOthersOnDeactivation AVAudioSessionSetActiveFlags = 1
)

func (AVAudioSessionSetActiveFlags) String added in v0.5.1 

func (e AVAudioSessionSetActiveFlags) String() string

type AVAudioSessionSetActiveOptions 

type AVAudioSessionSetActiveOptions uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/SetActiveOptions 

const (
	// AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation: An option that indicates that the system should notify other apps that you’ve deactivated your app’s audio session.
	AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation AVAudioSessionSetActiveOptions = 1
)

func (AVAudioSessionSetActiveOptions) String 

func (e AVAudioSessionSetActiveOptions) String() string

type AVAudioSessionSilenceSecondaryAudioHintType 

type AVAudioSessionSilenceSecondaryAudioHintType uint

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/SilenceSecondaryAudioHintType 

const (
	// AVAudioSessionSilenceSecondaryAudioHintTypeBegin: A value that indicates that another application’s primary audio has started.
	AVAudioSessionSilenceSecondaryAudioHintTypeBegin AVAudioSessionSilenceSecondaryAudioHintType = 1
	// AVAudioSessionSilenceSecondaryAudioHintTypeEnd: A value that indicates that another application’s primary audio has stopped.
	AVAudioSessionSilenceSecondaryAudioHintTypeEnd AVAudioSessionSilenceSecondaryAudioHintType = 0
)

func (AVAudioSessionSilenceSecondaryAudioHintType) String 

func (e AVAudioSessionSilenceSecondaryAudioHintType) String() string

type AVAudioSessionSoundStageSize 

type AVAudioSessionSoundStageSize int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/SoundStageSize 

const (
	// AVAudioSessionSoundStageSizeAutomatic: The system sets the sound stage size.
	AVAudioSessionSoundStageSizeAutomatic AVAudioSessionSoundStageSize = 0
	// AVAudioSessionSoundStageSizeLarge: A large sound stage.
	AVAudioSessionSoundStageSizeLarge AVAudioSessionSoundStageSize = 0
	// AVAudioSessionSoundStageSizeMedium: A medium sound stage.
	AVAudioSessionSoundStageSizeMedium AVAudioSessionSoundStageSize = 0
	// AVAudioSessionSoundStageSizeSmall: A small sound stage.
	AVAudioSessionSoundStageSizeSmall AVAudioSessionSoundStageSize = 0
)

func (AVAudioSessionSoundStageSize) String 

func (e AVAudioSessionSoundStageSize) String() string

type AVAudioSessionSpatialExperience 

type AVAudioSessionSpatialExperience int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSessionSpatialExperience-c.enum 

const (
	AVAudioSessionSpatialExperienceBypassed    AVAudioSessionSpatialExperience = 0
	AVAudioSessionSpatialExperienceFixed       AVAudioSessionSpatialExperience = 0
	AVAudioSessionSpatialExperienceHeadTracked AVAudioSessionSpatialExperience = 0
)

func (AVAudioSessionSpatialExperience) String 

func (e AVAudioSessionSpatialExperience) String() string

type AVAudioSinkNode 

type AVAudioSinkNode struct {
	AVAudioNode
}

An object that receives audio data.

Overview

You use an AVAudioSinkNode to receive audio data through AVAudioSinkNodeReceiverBlock. You only use it in the input chain.

An audio sink node doesn’t support format conversion. When connecting, use the output format of the input for the format for the connection. The format should match the hardware input sample rate.

The voice processing I/O unit is an exception to the above because it supports sample rate conversion. The input scope format (hardware format) and output scope format (client format) of the input node can differ in that case.

An audio sink node doesn’t support manual rendering mode, and doesn’t have an output bus, so you can’t install a tap on it.

Creating an Audio Sink Node

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSinkNode

func AVAudioSinkNodeFromID 

func AVAudioSinkNodeFromID(id objc.ID) AVAudioSinkNode

AVAudioSinkNodeFromID constructs a AVAudioSinkNode from an objc.ID.

An object that receives audio data.

func NewAVAudioSinkNode 

func NewAVAudioSinkNode() AVAudioSinkNode

NewAVAudioSinkNode creates a new AVAudioSinkNode instance.

func NewAudioSinkNodeWithReceiverBlock 

func NewAudioSinkNodeWithReceiverBlock(block AVAudioSinkNodeReceiverBlock) AVAudioSinkNode

Creates an audio sink node with a block that receives audio data.

block: The block that receives audio data from the input.

Discussion

When connecting the audio sink node to another node, the system uses the connection format to set the audio format for the input bus.

The system calls the block on the real-time thread when receiving input data. Avoid making blocking calls within the block.

When receiving data, the system sets the audio format using the node’s input format.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSinkNode/init(receiverBlock:)

func (AVAudioSinkNode) Autorelease 

func (a AVAudioSinkNode) Autorelease() AVAudioSinkNode

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioSinkNode) Init 

func (a AVAudioSinkNode) Init() AVAudioSinkNode

Init initializes the instance.

func (AVAudioSinkNode) InitWithReceiverBlock 

func (a AVAudioSinkNode) InitWithReceiverBlock(block AVAudioSinkNodeReceiverBlock) AVAudioSinkNode

Creates an audio sink node with a block that receives audio data.

block: The block that receives audio data from the input.

Discussion

When connecting the audio sink node to another node, the system uses the connection format to set the audio format for the input bus.

The system calls the block on the real-time thread when receiving input data. Avoid making blocking calls within the block.

When receiving data, the system sets the audio format using the node’s input format.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSinkNode/init(receiverBlock:)

type AVAudioSinkNodeClass 

type AVAudioSinkNodeClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioSinkNodeClass 

func GetAVAudioSinkNodeClass() AVAudioSinkNodeClass

GetAVAudioSinkNodeClass returns the class object for AVAudioSinkNode.

func (AVAudioSinkNodeClass) Alloc 

func (ac AVAudioSinkNodeClass) Alloc() AVAudioSinkNode

Alloc allocates memory for a new instance of the class.

func (AVAudioSinkNodeClass) Class 

func (ac AVAudioSinkNodeClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioSinkNodeReceiverBlock 

type AVAudioSinkNodeReceiverBlock = func(objectivec.IObject, uint32, objectivec.IObject) int

AVAudioSinkNodeReceiverBlock is a block that receives audio data from an audio sink node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSinkNodeReceiverBlock

type AVAudioSourceNode 

type AVAudioSourceNode struct {
	AVAudioNode
}

An object that supplies audio data.

Overview

The AVAudioSourceNode class allows for supplying audio data for rendering through AVAudioSourceNodeRenderBlock. It’s a convenient method for delievering audio data instead of setting the input callback on an audio unit with `kAudioUnitProperty_SetRenderCallback`.

Creating an Audio Source Node

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSourceNode

func AVAudioSourceNodeFromID 

func AVAudioSourceNodeFromID(id objc.ID) AVAudioSourceNode

AVAudioSourceNodeFromID constructs a AVAudioSourceNode from an objc.ID.

An object that supplies audio data.

func NewAVAudioSourceNode 

func NewAVAudioSourceNode() AVAudioSourceNode

NewAVAudioSourceNode creates a new AVAudioSourceNode instance.

func NewAudioSourceNodeWithFormatRenderBlock 

func NewAudioSourceNodeWithFormatRenderBlock(format IAVAudioFormat, block AVAudioSourceNodeRenderBlock) AVAudioSourceNode

Creates an audio source node with the audio format and a block that supplies audio data.

format: The format of the pulse-code modulated (PCM) audio data the block supplies.

block: The block to supply audio data to the output.

Discussion

When connecting the audio source node to another node, the system uses the connection format to set the audio format for the output bus.

Depending on the audio engine’s operating mode, call the block on real-time or nonreal-time threads. When rendering to a device, avoid making blocking calls within the block.

AVAudioSourceNode supports different audio formats for the block and the output, but the system only supports linear PCM conversions with sample rate, bit depth, and interleaving.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSourceNode/init(format:renderBlock:)

func NewAudioSourceNodeWithRenderBlock 

func NewAudioSourceNodeWithRenderBlock(block AVAudioSourceNodeRenderBlock) AVAudioSourceNode

Creates an audio source node with a block that supplies audio data.

block: The block to supply audio data to the output.

Discussion

When connecting the audio source node to another node, the system uses the connection format to set the audio format for the output bus.

Depending on the audio engine’s operating mode, call the block on real-time or nonreal-time threads. When rendering to a device, avoid making blocking calls within the block.

The system sets the node’s output format using the audio format for the render block. When reconnecting the node with a different output format, the audio format for the block changes.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSourceNode/init(renderBlock:)

func (AVAudioSourceNode) Autorelease 

func (a AVAudioSourceNode) Autorelease() AVAudioSourceNode

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioSourceNode) DestinationForMixerBus 

func (a AVAudioSourceNode) DestinationForMixerBus(mixer IAVAudioNode, bus AVAudioNodeBus) IAVAudioMixingDestination

Gets the audio mixing destination object that corresponds to the specified mixer node and input bus.

mixer: The mixer to get destination details for.

bus: The input bus.

Return Value

Returns `self` if the specified mixer or input bus matches its connection point. If the mixer or input bus doesn’t match its connection point, or if the source node isn’t in a connected state to the mixer or input bus, the method returns `nil.`

Discussion

When you connect a source node to multiple mixers downstream, setting AVAudioMixing properties directly on the source node applies the change to all of them. Use this method to get the corresponding AVAudioMixingDestination for a specific mixer. Properties set on individual destination instances don’t reflect at the source node level.

If there’s any disconnection between the source and mixer nodes, the return value can be invalid. Fetch the return value every time you want to set or get properties on a specific mixer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/destination(forMixer:bus:)

func (AVAudioSourceNode) Init 

func (a AVAudioSourceNode) Init() AVAudioSourceNode

Init initializes the instance.

func (AVAudioSourceNode) InitWithFormatRenderBlock 

func (a AVAudioSourceNode) InitWithFormatRenderBlock(format IAVAudioFormat, block AVAudioSourceNodeRenderBlock) AVAudioSourceNode

Creates an audio source node with the audio format and a block that supplies audio data.

format: The format of the pulse-code modulated (PCM) audio data the block supplies.

block: The block to supply audio data to the output.

Discussion

When connecting the audio source node to another node, the system uses the connection format to set the audio format for the output bus.

Depending on the audio engine’s operating mode, call the block on real-time or nonreal-time threads. When rendering to a device, avoid making blocking calls within the block.

AVAudioSourceNode supports different audio formats for the block and the output, but the system only supports linear PCM conversions with sample rate, bit depth, and interleaving.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSourceNode/init(format:renderBlock:)

func (AVAudioSourceNode) InitWithRenderBlock 

func (a AVAudioSourceNode) InitWithRenderBlock(block AVAudioSourceNodeRenderBlock) AVAudioSourceNode

Creates an audio source node with a block that supplies audio data.

block: The block to supply audio data to the output.

Discussion

When connecting the audio source node to another node, the system uses the connection format to set the audio format for the output bus.

Depending on the audio engine’s operating mode, call the block on real-time or nonreal-time threads. When rendering to a device, avoid making blocking calls within the block.

The system sets the node’s output format using the audio format for the render block. When reconnecting the node with a different output format, the audio format for the block changes.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSourceNode/init(renderBlock:)

func (AVAudioSourceNode) Obstruction 

func (a AVAudioSourceNode) Obstruction() float32

A value that simulates filtering of the direct path of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks only the direct path of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudioSourceNode) Occlusion 

func (a AVAudioSourceNode) Occlusion() float32

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks the direct and reverb paths of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudioSourceNode) Pan 

func (a AVAudioSourceNode) Pan() float32

The bus’s stereo pan.

Discussion

The default value is `0.0`, and the range of valid values is `-1.0` to `1.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioSourceNode) PointSourceInHeadMode 

func (a AVAudioSourceNode) PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudioSourceNode) Position 

func (a AVAudioSourceNode) Position() AVAudio3DPoint

The location of the source in the 3D environment.

Discussion

The system specifies the coordinates in meters. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudioSourceNode) Rate 

func (a AVAudioSourceNode) Rate() float32

A value that changes the playback rate of the input signal.

Discussion

A value of `2.0` results in the output audio playing one octave higher. A value of `0.5` results in the output audio playing one octave lower.

The default value is `1.0`, and the range of valid values is `0.5` to `2.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudioSourceNode) RenderingAlgorithm 

func (a AVAudioSourceNode) RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

The type of rendering algorithm the mixer uses.

Discussion

Depending on the current output format of the AVAudioEnvironmentNode instance, the system may only support a subset of the rendering algorithms. You can retrieve an array of valid rendering algorithms by calling the [ApplicableRenderingAlgorithms] function of the AVAudioEnvironmentNode instance.

The default rendering algorithm is AVAudio3DMixingRenderingAlgorithmEqualPowerPanning. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudioSourceNode) ReverbBlend 

func (a AVAudioSourceNode) ReverbBlend() float32

A value that controls the blend of dry and reverb processed audio.

Discussion

This property controls the amount of the source’s audio that the AVAudioEnvironmentNode instance processes. A value of `0.5` results in an equal blend of dry and processed (wet) audio.

The default is `0.0`, and the range of valid values is `0.0` (completely dry) to `1.0` (completely wet). Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudioSourceNode) SetObstruction 

func (a AVAudioSourceNode) SetObstruction(value float32)

func (AVAudioSourceNode) SetOcclusion 

func (a AVAudioSourceNode) SetOcclusion(value float32)

func (AVAudioSourceNode) SetPan 

func (a AVAudioSourceNode) SetPan(value float32)

func (AVAudioSourceNode) SetPointSourceInHeadMode 

func (a AVAudioSourceNode) SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

func (AVAudioSourceNode) SetPosition 

func (a AVAudioSourceNode) SetPosition(value AVAudio3DPoint)

func (AVAudioSourceNode) SetRate 

func (a AVAudioSourceNode) SetRate(value float32)

func (AVAudioSourceNode) SetRenderingAlgorithm 

func (a AVAudioSourceNode) SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)

func (AVAudioSourceNode) SetReverbBlend 

func (a AVAudioSourceNode) SetReverbBlend(value float32)

func (AVAudioSourceNode) SetSourceMode 

func (a AVAudioSourceNode) SetSourceMode(value AVAudio3DMixingSourceMode)

func (AVAudioSourceNode) SetVolume 

func (a AVAudioSourceNode) SetVolume(value float32)

func (AVAudioSourceNode) SourceMode 

func (a AVAudioSourceNode) SourceMode() AVAudio3DMixingSourceMode

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudioSourceNode) Volume 

func (a AVAudioSourceNode) Volume() float32

The bus’s input volume.

Discussion

The default value is `1.0`, and the range of valid values is `0.0` to `1.0`. Only the AVAudioEnvironmentNode and the AVAudioMixerNode implement this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume

type AVAudioSourceNodeClass 

type AVAudioSourceNodeClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioSourceNodeClass 

func GetAVAudioSourceNodeClass() AVAudioSourceNodeClass

GetAVAudioSourceNodeClass returns the class object for AVAudioSourceNode.

func (AVAudioSourceNodeClass) Alloc 

func (ac AVAudioSourceNodeClass) Alloc() AVAudioSourceNode

Alloc allocates memory for a new instance of the class.

func (AVAudioSourceNodeClass) Class 

func (ac AVAudioSourceNodeClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioSourceNodeRenderBlock 

type AVAudioSourceNodeRenderBlock = func(*bool, objectivec.IObject, uint32, objectivec.IObject) int

AVAudioSourceNodeRenderBlock is a block that supplies audio data to an audio source node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSourceNodeRenderBlock

type AVAudioStereoMixing 

type AVAudioStereoMixing interface {
	objectivec.IObject

	// The bus’s stereo pan.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan
	Pan() float32

	// The bus’s stereo pan.
	//
	// See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan
	SetPan(value float32)
}

A protocol that defines stereo mixing properties a mixer uses.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing

type AVAudioStereoMixingObject 

type AVAudioStereoMixingObject struct {
	objectivec.Object
}

AVAudioStereoMixingObject wraps an existing Objective-C object that conforms to the AVAudioStereoMixing protocol.

func AVAudioStereoMixingObjectFromID 

func AVAudioStereoMixingObjectFromID(id objc.ID) AVAudioStereoMixingObject

AVAudioStereoMixingObjectFromID constructs a AVAudioStereoMixingObject from an objc.ID. The object is determined to conform to the protocol at runtime.

func (AVAudioStereoMixingObject) BaseObject 

func (o AVAudioStereoMixingObject) BaseObject() objectivec.Object

func (AVAudioStereoMixingObject) Pan 

func (o AVAudioStereoMixingObject) Pan() float32

The bus’s stereo pan.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioStereoMixingObject) SetPan 

func (o AVAudioStereoMixingObject) SetPan(value float32)

The bus’s stereo pan.

Discussion

The default value is `0.0`, and the range of valid values is `-1.0` to `1.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

type AVAudioStereoOrientation 

type AVAudioStereoOrientation int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSession/StereoOrientation 

const (
	// AVAudioStereoOrientationLandscapeLeft: Audio capture should be horizontally oriented, with the USB-C or Lightning connector on the left.
	AVAudioStereoOrientationLandscapeLeft AVAudioStereoOrientation = 4
	// AVAudioStereoOrientationLandscapeRight: Audio capture should be horizontally oriented, with the USB-C or Lightning connector on the right.
	AVAudioStereoOrientationLandscapeRight AVAudioStereoOrientation = 3
	// AVAudioStereoOrientationNone: The audio session isn’t configured for stereo recording.
	AVAudioStereoOrientationNone AVAudioStereoOrientation = 0
	// AVAudioStereoOrientationPortrait: Audio capture should be vertically oriented, with the USB-C or Lightning connector on the bottom.
	AVAudioStereoOrientationPortrait AVAudioStereoOrientation = 1
	// AVAudioStereoOrientationPortraitUpsideDown: Audio capture should be vertically oriented, with the USB-C or Lightning connector on the top.
	AVAudioStereoOrientationPortraitUpsideDown AVAudioStereoOrientation = 2
)

func (AVAudioStereoOrientation) String 

func (e AVAudioStereoOrientation) String() string

type AVAudioTime 

type AVAudioTime struct {
	objectivec.Object
}

An object you use to represent a moment in time.

Overview

The AVAudioTime object represents a single moment in time in two ways:

- As host time, using the system’s basic clock with `mach_absolute_time()` - As audio samples at a particular sample rate

A single AVAudioTime instance contains either or both representations, meaning it might represent only a sample time, a host time, or both.

Instances of this class are immutable.

Creating an Audio Time Instance

Manipulating Host Time

Getting Sample Rate Information

Getting the Core Audio Time Stamp

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime

func AVAudioTimeFromID 

func AVAudioTimeFromID(id objc.ID) AVAudioTime

AVAudioTimeFromID constructs a AVAudioTime from an objc.ID.

An object you use to represent a moment in time.

func NewAVAudioTime 

func NewAVAudioTime() AVAudioTime

NewAVAudioTime creates a new AVAudioTime instance.

func NewAudioTimeWithAudioTimeStampSampleRate 

func NewAudioTimeWithAudioTimeStampSampleRate(ts objectivec.IObject, sampleRate float64) AVAudioTime

Creates an audio time object with the specified timestamp and sample rate.

ts: The timestamp.

sampleRate: The sample rate.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/init(audioTimeStamp:sampleRate:)

func NewAudioTimeWithHostTime 

func NewAudioTimeWithHostTime(hostTime uint64) AVAudioTime

Creates an audio time object with the specified host time.

hostTime: The host time.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/init(hostTime:)

func NewAudioTimeWithHostTimeSampleTimeAtRate 

func NewAudioTimeWithHostTimeSampleTimeAtRate(hostTime uint64, sampleTime AVAudioFramePosition, sampleRate float64) AVAudioTime

Creates an audio time object with the specified host time, sample time, and sample rate.

hostTime: The host time.

sampleTime: The sample time.

sampleRate: The sample rate.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/init(hostTime:sampleTime:atRate:)

func NewAudioTimeWithSampleTimeAtRate 

func NewAudioTimeWithSampleTimeAtRate(sampleTime AVAudioFramePosition, sampleRate float64) AVAudioTime

Creates an audio time object with the specified timestamp and sample rate.

sampleTime: The sample time.

sampleRate: The sample rate.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/init(sampleTime:atRate:)

func (AVAudioTime) AudioTimeStamp 

func (a AVAudioTime) AudioTimeStamp() objectivec.IObject

The time as an audio timestamp.

Discussion

This is useful for compatibility with lower-level Core Audio and Audio Toolbox API.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/audioTimeStamp

func (AVAudioTime) Autorelease 

func (a AVAudioTime) Autorelease() AVAudioTime

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioTime) ExtrapolateTimeFromAnchor 

func (a AVAudioTime) ExtrapolateTimeFromAnchor(anchorTime IAVAudioTime) IAVAudioTime

Creates an audio time object by converting between host time and sample time.

anchorTime: An audio time instance with a more complete timestamp than that of the receiver (self).

Return Value

A new AVAudioTime instance.

Discussion

If `anchorTime` is an AVAudioTime instance where both host time and sample time are valid, and the receiver is another timestamp where only one of the two is valid, this method returns a new AVAudioTime. It copies it from the receiver, where the anchor provides additional valid fields.

The `anchorTime` value must have a valid host time and sample time, and self must have sample rate and at least one valid host time or sample time. Otherwise, this method returns `nil`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/extrapolateTime(fromAnchor:)

func (AVAudioTime) HostTime 

func (a AVAudioTime) HostTime() uint64

The host time.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/hostTime

func (AVAudioTime) HostTimeValid 

func (a AVAudioTime) HostTimeValid() bool

A Boolean value that indicates whether the host time value is valid.

Discussion

This property returns true if the [HostTime] property is valid; otherwise, it returns false.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/isHostTimeValid

func (AVAudioTime) Init 

func (a AVAudioTime) Init() AVAudioTime

Init initializes the instance.

func (AVAudioTime) InitWithAudioTimeStampSampleRate 

func (a AVAudioTime) InitWithAudioTimeStampSampleRate(ts objectivec.IObject, sampleRate float64) AVAudioTime

Creates an audio time object with the specified timestamp and sample rate.

ts: The timestamp.

sampleRate: The sample rate.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/init(audioTimeStamp:sampleRate:)

func (AVAudioTime) InitWithHostTime 

func (a AVAudioTime) InitWithHostTime(hostTime uint64) AVAudioTime

Creates an audio time object with the specified host time.

hostTime: The host time.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/init(hostTime:)

func (AVAudioTime) InitWithHostTimeSampleTimeAtRate 

func (a AVAudioTime) InitWithHostTimeSampleTimeAtRate(hostTime uint64, sampleTime AVAudioFramePosition, sampleRate float64) AVAudioTime

Creates an audio time object with the specified host time, sample time, and sample rate.

hostTime: The host time.

sampleTime: The sample time.

sampleRate: The sample rate.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/init(hostTime:sampleTime:atRate:)

func (AVAudioTime) InitWithSampleTimeAtRate 

func (a AVAudioTime) InitWithSampleTimeAtRate(sampleTime AVAudioFramePosition, sampleRate float64) AVAudioTime

Creates an audio time object with the specified timestamp and sample rate.

sampleTime: The sample time.

sampleRate: The sample rate.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/init(sampleTime:atRate:)

func (AVAudioTime) SampleRate 

func (a AVAudioTime) SampleRate() float64

The sampling rate that the sample time property expresses.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/sampleRate

func (AVAudioTime) SampleTime 

func (a AVAudioTime) SampleTime() AVAudioFramePosition

The time as a number of audio samples that the current audio device tracks.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/sampleTime

func (AVAudioTime) SampleTimeValid 

func (a AVAudioTime) SampleTimeValid() bool

A Boolean value that indicates whether the sample time and sample rate properties are in a valid state.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/isSampleTimeValid

type AVAudioTimeClass 

type AVAudioTimeClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioTimeClass 

func GetAVAudioTimeClass() AVAudioTimeClass

GetAVAudioTimeClass returns the class object for AVAudioTime.

func (AVAudioTimeClass) Alloc 

func (ac AVAudioTimeClass) Alloc() AVAudioTime

Alloc allocates memory for a new instance of the class.

func (AVAudioTimeClass) Class 

func (ac AVAudioTimeClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

func (AVAudioTimeClass) HostTimeForSeconds 

func (_AVAudioTimeClass AVAudioTimeClass) HostTimeForSeconds(seconds float64) uint64

Converts seconds to host time.

seconds: The number of seconds.

Return Value

The host time that represents the seconds you specify.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/hostTime(forSeconds:)

func (AVAudioTimeClass) SecondsForHostTime 

func (_AVAudioTimeClass AVAudioTimeClass) SecondsForHostTime(hostTime uint64) float64

Converts host time to seconds.

hostTime: The host time.

Return Value

The number of seconds that represent the host time you specify.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/seconds(forHostTime:)

func (AVAudioTimeClass) TimeWithAudioTimeStampSampleRate 

func (_AVAudioTimeClass AVAudioTimeClass) TimeWithAudioTimeStampSampleRate(ts objectivec.IObject, sampleRate float64) AVAudioTime

Creates an audio time object with the specified timestamp and sample rate.

ts: The timestamp.

sampleRate: The sample rate.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/timeWithAudioTimeStamp:sampleRate:

func (AVAudioTimeClass) TimeWithHostTime 

func (_AVAudioTimeClass AVAudioTimeClass) TimeWithHostTime(hostTime uint64) AVAudioTime

Creates an audio time object with the specified host time.

hostTime: The host time.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/timeWithHostTime:

func (AVAudioTimeClass) TimeWithHostTimeSampleTimeAtRate 

func (_AVAudioTimeClass AVAudioTimeClass) TimeWithHostTimeSampleTimeAtRate(hostTime uint64, sampleTime AVAudioFramePosition, sampleRate float64) AVAudioTime

Creates an audio time object with the specified host time, sample time, and sample rate.

hostTime: The host time.

sampleTime: The sample time.

sampleRate: The sample rate.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/timeWithHostTime:sampleTime:atRate:

func (AVAudioTimeClass) TimeWithSampleTimeAtRate 

func (_AVAudioTimeClass AVAudioTimeClass) TimeWithSampleTimeAtRate(sampleTime AVAudioFramePosition, sampleRate float64) AVAudioTime

Creates an audio time object with the specified sample time and sample rate.

sampleTime: The sample time.

sampleRate: The sample rate.

Return Value

A new AVAudioTime instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime/timeWithSampleTime:atRate:

type AVAudioUnit 

type AVAudioUnit struct {
	AVAudioNode
}

A subclass of the audio node class that, processes audio either in real time or nonreal time, depending on the type of the audio unit.

Getting the Core Audio audio unit

Loading an audio preset file

Getting audio unit values

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnit

func AVAudioUnitFromID 

func AVAudioUnitFromID(id objc.ID) AVAudioUnit

AVAudioUnitFromID constructs a AVAudioUnit from an objc.ID.

A subclass of the audio node class that, processes audio either in real time or nonreal time, depending on the type of the audio unit.

func NewAVAudioUnit 

func NewAVAudioUnit() AVAudioUnit

NewAVAudioUnit creates a new AVAudioUnit instance.

func (AVAudioUnit) AudioComponentDescription 

func (a AVAudioUnit) AudioComponentDescription() objectivec.IObject

The audio component description that represents the underlying Core Audio audio unit.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnit/audioComponentDescription

func (AVAudioUnit) AudioUnit 

func (a AVAudioUnit) AudioUnit() IAVAudioUnit

The underlying Core Audio audio unit.

Discussion

This property is a reference to the underlying audio unit. The AVAudioUnit exposes it here so that you can modify parameters, that you don’t see through AVAudioUnit subclasses, using the AudioUnit C API. For example, changing initialization state, stream formats, channel layouts, or connections to other audio units.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnit/audioUnit

func (AVAudioUnit) Autorelease 

func (a AVAudioUnit) Autorelease() AVAudioUnit

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnit) Init 

func (a AVAudioUnit) Init() AVAudioUnit

Init initializes the instance.

func (AVAudioUnit) LoadAudioUnitPresetAtURLError 

func (a AVAudioUnit) LoadAudioUnitPresetAtURLError(url foundation.INSURL) (bool, error)

Loads an audio unit using a specified preset.

url: The URL of an audio unit preset file.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnit/loadPreset(at:)

func (AVAudioUnit) ManufacturerName 

func (a AVAudioUnit) ManufacturerName() string

The name of the manufacturer of the audio unit.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnit/manufacturerName

func (AVAudioUnit) Name 

func (a AVAudioUnit) Name() string

The name of the audio unit.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnit/name

func (AVAudioUnit) Version 

func (a AVAudioUnit) Version() uint

The version number of the audio unit.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnit/version

type AVAudioUnitClass 

type AVAudioUnitClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitClass 

func GetAVAudioUnitClass() AVAudioUnitClass

GetAVAudioUnitClass returns the class object for AVAudioUnit.

func (AVAudioUnitClass) Alloc 

func (ac AVAudioUnitClass) Alloc() AVAudioUnit

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitClass) Class 

func (ac AVAudioUnitClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

func (AVAudioUnitClass) InstantiateWithComponentDescriptionOptions 

func (ac AVAudioUnitClass) InstantiateWithComponentDescriptionOptions(ctx context.Context, audioComponentDescription objectivec.IObject, options objectivec.IObject) (*AVAudioUnit, error)

InstantiateWithComponentDescriptionOptions is a synchronous wrapper around [AVAudioUnit.InstantiateWithComponentDescriptionOptionsCompletionHandler]. It blocks until the completion handler fires or the context is cancelled.

func (AVAudioUnitClass) InstantiateWithComponentDescriptionOptionsCompletionHandler 

func (_AVAudioUnitClass AVAudioUnitClass) InstantiateWithComponentDescriptionOptionsCompletionHandler(audioComponentDescription objectivec.IObject, options objectivec.IObject, completionHandler AVAudioUnitErrorHandler)

Creates an instance of an audio unit component asynchronously and wraps it in an audio unit class.

audioComponentDescription: The component to create.

options: The options the method uses to create the component.

completionHandler: A handler the framework calls in an arbitrary thread context when creation completes. Retain the AVAudioUnit this handler provides.

audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

options is a [audiotoolbox.AudioComponentInstantiationOptions].

Discussion

You must create components with flags that include requiresAsyncInstantiation asynchronously through this method if they’re for use with AVAudioEngine.

The AVAudioUnit instance is usually a subclass that the method selects according to the components type. For example, AVAudioUnitEffect, AVAudioUnitGenerator, AVAudioUnitMIDIInstrument, or AVAudioUnitTimeEffect.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnit/instantiate(with:options:completionHandler:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription]. options is a [audiotoolbox.AudioComponentInstantiationOptions].

type AVAudioUnitComponent 

type AVAudioUnitComponent struct {
	objectivec.Object
}

An object that provides details about an audio unit.

Overview

Details can include information such as type, subtype, manufacturer, and location. An AVAudioUnitComponent can include user tags, which you can query later for display.

Getting the audio unit component’s audio unit

Getting audio unit component information

Getting audio unit component tags

Audio unit manufacturer names

Audio unit types

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent

func AVAudioUnitComponentFromID 

func AVAudioUnitComponentFromID(id objc.ID) AVAudioUnitComponent

AVAudioUnitComponentFromID constructs a AVAudioUnitComponent from an objc.ID.

An object that provides details about an audio unit.

func NewAVAudioUnitComponent 

func NewAVAudioUnitComponent() AVAudioUnitComponent

NewAVAudioUnitComponent creates a new AVAudioUnitComponent instance.

func (AVAudioUnitComponent) AVAudioUnitManufacturerNameApple 

func (a AVAudioUnitComponent) AVAudioUnitManufacturerNameApple() string

The audio unit manufacturer is Apple.

See: https://developer.apple.com/documentation/avfaudio/avaudiounitmanufacturernameapple

func (AVAudioUnitComponent) AVAudioUnitTypeEffect 

func (a AVAudioUnitComponent) AVAudioUnitTypeEffect() string

An audio unit type that represents an effect.

See: https://developer.apple.com/documentation/avfaudio/avaudiounittypeeffect

func (AVAudioUnitComponent) AVAudioUnitTypeFormatConverter 

func (a AVAudioUnitComponent) AVAudioUnitTypeFormatConverter() string

An audio unit type that represents a format converter.

See: https://developer.apple.com/documentation/avfaudio/avaudiounittypeformatconverter

func (AVAudioUnitComponent) AVAudioUnitTypeGenerator 

func (a AVAudioUnitComponent) AVAudioUnitTypeGenerator() string

An audio unit type that represents a generator.

See: https://developer.apple.com/documentation/avfaudio/avaudiounittypegenerator

func (AVAudioUnitComponent) AVAudioUnitTypeMIDIProcessor 

func (a AVAudioUnitComponent) AVAudioUnitTypeMIDIProcessor() string

An audio unit type that represents a MIDI processor.

See: https://developer.apple.com/documentation/avfaudio/avaudiounittypemidiprocessor

func (AVAudioUnitComponent) AVAudioUnitTypeMixer 

func (a AVAudioUnitComponent) AVAudioUnitTypeMixer() string

An audio unit type that represents a mixer.

See: https://developer.apple.com/documentation/avfaudio/avaudiounittypemixer

func (AVAudioUnitComponent) AVAudioUnitTypeMusicDevice 

func (a AVAudioUnitComponent) AVAudioUnitTypeMusicDevice() string

An audio unit type that represents a music device.

See: https://developer.apple.com/documentation/avfaudio/avaudiounittypemusicdevice

func (AVAudioUnitComponent) AVAudioUnitTypeMusicEffect 

func (a AVAudioUnitComponent) AVAudioUnitTypeMusicEffect() string

An audio unit type that represents a music effect.

See: https://developer.apple.com/documentation/avfaudio/avaudiounittypemusiceffect

func (AVAudioUnitComponent) AVAudioUnitTypeOfflineEffect 

func (a AVAudioUnitComponent) AVAudioUnitTypeOfflineEffect() string

An audio unit type that represents an offline effect.

See: https://developer.apple.com/documentation/avfaudio/avaudiounittypeofflineeffect

func (AVAudioUnitComponent) AVAudioUnitTypeOutput 

func (a AVAudioUnitComponent) AVAudioUnitTypeOutput() string

An audio unit type that represents an output.

See: https://developer.apple.com/documentation/avfaudio/avaudiounittypeoutput

func (AVAudioUnitComponent) AVAudioUnitTypePanner 

func (a AVAudioUnitComponent) AVAudioUnitTypePanner() string

An audio unit type that represents a panner.

See: https://developer.apple.com/documentation/avfaudio/avaudiounittypepanner

func (AVAudioUnitComponent) AllTagNames 

func (a AVAudioUnitComponent) AllTagNames() []string

An array of tag names for the audio unit component.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/allTagNames

func (AVAudioUnitComponent) AudioComponent 

func (a AVAudioUnitComponent) AudioComponent() objectivec.IObject

The underlying audio component.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/audioComponent

func (AVAudioUnitComponent) AudioComponentDescription 

func (a AVAudioUnitComponent) AudioComponentDescription() objectivec.IObject

The audio component description.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/audioComponentDescription

func (AVAudioUnitComponent) Autorelease 

func (a AVAudioUnitComponent) Autorelease() AVAudioUnitComponent

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitComponent) AvailableArchitectures 

func (a AVAudioUnitComponent) AvailableArchitectures() []foundation.NSNumber

An array of architectures that the audio unit supports.

Discussion

This is an [NSArray] of [NSNumbers] where each entry corresponds to one of the constants in Mach-O Architecture in Bundle.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/availableArchitectures

func (AVAudioUnitComponent) ConfigurationDictionary 

func (a AVAudioUnitComponent) ConfigurationDictionary() foundation.INSDictionary

The audio unit component’s configuration dictionary.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/configurationDictionary

func (AVAudioUnitComponent) HasCustomView 

func (a AVAudioUnitComponent) HasCustomView() bool

A Boolean value that indicates whether the audio unit component has a custom view.

Discussion

This property is true if the component has a custom view; otherwise, false.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/hasCustomView

func (AVAudioUnitComponent) HasMIDIInput 

func (a AVAudioUnitComponent) HasMIDIInput() bool

A Boolean value that indicates whether the audio unit component has MIDI input.

Discussion

This property is true if the component has MIDI input; otherwise, false.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/hasMIDIInput

func (AVAudioUnitComponent) HasMIDIOutput 

func (a AVAudioUnitComponent) HasMIDIOutput() bool

A Boolean value that indicates whether the audio unit component has MIDI output.

Discussion

This property is true if the component has MIDI output; otherwise, false.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/hasMIDIOutput

func (AVAudioUnitComponent) Icon 

func (a AVAudioUnitComponent) Icon() objc.ID

An icon that represents the component.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/icon

func (AVAudioUnitComponent) IconURL 

func (a AVAudioUnitComponent) IconURL() foundation.INSURL

The URL of an icon that represents the audio unit component.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/iconURL

func (AVAudioUnitComponent) Init 

func (a AVAudioUnitComponent) Init() AVAudioUnitComponent

Init initializes the instance.

func (AVAudioUnitComponent) LocalizedTypeName 

func (a AVAudioUnitComponent) LocalizedTypeName() string

The localized type name of the component.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/localizedTypeName

func (AVAudioUnitComponent) ManufacturerName 

func (a AVAudioUnitComponent) ManufacturerName() string

The name of the manufacturer of the audio unit component.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/manufacturerName

func (AVAudioUnitComponent) Name 

func (a AVAudioUnitComponent) Name() string

The name of the audio unit component.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/name

func (AVAudioUnitComponent) PassesAUVal 

func (a AVAudioUnitComponent) PassesAUVal() bool

A Boolean value that indicates whether the audio unit component passes the validation tests.

Discussion

This property is true if the component passes the validation tests; otherwise, false.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/passesAUVal

func (AVAudioUnitComponent) SandboxSafe 

func (a AVAudioUnitComponent) SandboxSafe() bool

A Boolean value that indicates whether the audio unit component is safe for sandboxing.

Discussion

This property is true if the component is safe for sandboxing; otherwise, false. This only applies to the current process.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/isSandboxSafe

func (AVAudioUnitComponent) SetUserTagNames 

func (a AVAudioUnitComponent) SetUserTagNames(value []string)

func (AVAudioUnitComponent) SupportsNumberInputChannelsOutputChannels 

func (a AVAudioUnitComponent) SupportsNumberInputChannelsOutputChannels(numInputChannels int, numOutputChannels int) bool

Gets a Boolean value that indicates whether the audio unit component supports the specified number of input and output channels.

numInputChannels: The number of input channels.

numOutputChannels: The number of output channels.

Return Value

A value of true if the audio unit component supports the specified number of input and output channels; otherwise, false.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/supportsNumberInputChannels(_:outputChannels:)

func (AVAudioUnitComponent) TypeName 

func (a AVAudioUnitComponent) TypeName() string

The audio unit component type.

Discussion

For information about possible values, see the “Audio Unit Types” topic under AVAudioUnitComponent.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/typeName

func (AVAudioUnitComponent) UserTagNames 

func (a AVAudioUnitComponent) UserTagNames() []string

An array of tags the user creates.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/userTagNames

func (AVAudioUnitComponent) Version 

func (a AVAudioUnitComponent) Version() uint

The audio unit component version number.

Discussion

The version number is an [NSNumber] made of a hexadecimal number with a major, minor, and dot-release format, such as `0xMMMMmmDD`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/version

func (AVAudioUnitComponent) VersionString 

func (a AVAudioUnitComponent) VersionString() string

A string that represents the audio unit component version number.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent/versionString

type AVAudioUnitComponentClass 

type AVAudioUnitComponentClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitComponentClass 

func GetAVAudioUnitComponentClass() AVAudioUnitComponentClass

GetAVAudioUnitComponentClass returns the class object for AVAudioUnitComponent.

func (AVAudioUnitComponentClass) Alloc 

func (ac AVAudioUnitComponentClass) Alloc() AVAudioUnitComponent

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitComponentClass) Class 

func (ac AVAudioUnitComponentClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitComponentHandler 

type AVAudioUnitComponentHandler = func(*AVAudioUnitComponent)

AVAudioUnitComponentHandler handles The block to apply to the audio unit components.

  • comp: A block to test.
  • stop: A reference to a Boolean value. To stop further processing of the search, the block sets the value to [true](<doc://com.apple.documentation/documentation/Swift/true>). The stop argument is an out-only argument. Only set this Boolean to [true](<doc://com.apple.documentation/documentation/Swift/true>) within the block.

Used by:

type AVAudioUnitComponentManager 

type AVAudioUnitComponentManager struct {
	objectivec.Object
}

An object that provides a way to search and query audio components that the system registers.

Overview

The component manager has methods to find various information about the audio components without opening them. Currently, you can only search audio components that are audio units.

The class supports system tags and arbitrary user tags. You can tag each audio unit as part of its definition. Audio unit hosts, such as Logic or GarageBand, can present groupings of audio units according to the tags.

You can search for audio units in the following ways:

- Using a [NSPredicate] instance that contains search strings for tags or descriptions - Using a block to match on a custom criteria - Using an [AudioComponentDescription]

Getting matching audio components

Getting audio unit tags

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponentManager

func AVAudioUnitComponentManagerFromID 

func AVAudioUnitComponentManagerFromID(id objc.ID) AVAudioUnitComponentManager

AVAudioUnitComponentManagerFromID constructs a AVAudioUnitComponentManager from an objc.ID.

An object that provides a way to search and query audio components that the system registers.

func NewAVAudioUnitComponentManager 

func NewAVAudioUnitComponentManager() AVAudioUnitComponentManager

NewAVAudioUnitComponentManager creates a new AVAudioUnitComponentManager instance.

func (AVAudioUnitComponentManager) Autorelease 

func (a AVAudioUnitComponentManager) Autorelease() AVAudioUnitComponentManager

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitComponentManager) ComponentsMatchingDescription 

func (a AVAudioUnitComponentManager) ComponentsMatchingDescription(desc objectivec.IObject) []AVAudioUnitComponent

Gets an array of audio component objects that match the description.

desc is a [audiotoolbox.AudioComponentDescription].

Return Value

An array of [AVAudioComponent] objects that match the `description`.

Discussion

- desc: The AudioComponentDescription structure to match. The method uses the `type`, `subtype` and `manufacturer` fields to search for matching audio units. A value of `0` for any of these fields is a wildcard and returns the first match the method finds.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponentManager/components(matching:)-9qt94 desc is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitComponentManager) ComponentsMatchingPredicate 

func (a AVAudioUnitComponentManager) ComponentsMatchingPredicate(predicate foundation.INSPredicate) []AVAudioUnitComponent

Gets an array of audio component objects that match the search predicate.

predicate: The search predicate.

Return Value

An array of [AVAudioComponent] objects that match the predicate.

Discussion

You use the audio component’s information or tags to build search criteria, such as `“typeName CONTAINS 'Effect'"` or `“tags IN {'Sampler', 'MIDI'}"`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponentManager/components(matching:)-96l2c

func (AVAudioUnitComponentManager) ComponentsPassingTest 

func (a AVAudioUnitComponentManager) ComponentsPassingTest(testHandler AVAudioUnitComponentHandler) []AVAudioUnitComponent

Gets an array of audio components that pass the block method.

testHandler: The block to apply to the audio unit components.

The block takes two parameters.

comp: A block to test. stop: A reference to a Boolean value. To stop further processing of the search, the block sets the value to true. The stop argument is an out-only argument. Only set this Boolean to true within the block.

The block returns a Boolean value that indicates whether `comp` passes the test. Returning true stops further processing of the audio components.

Return Value

An array of audio components that pass the test.

Discussion

For each audio component the manager finds, the system calls the block method. If the block returns true, the method adds [AVAudioComponent] instance to the array.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponentManager/components(passingTest:)

func (AVAudioUnitComponentManager) Init 

func (a AVAudioUnitComponentManager) Init() AVAudioUnitComponentManager

Init initializes the instance.

func (AVAudioUnitComponentManager) StandardLocalizedTagNames 

func (a AVAudioUnitComponentManager) StandardLocalizedTagNames() []string

An array of the localized standard system tags the audio units define.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponentManager/standardLocalizedTagNames

func (AVAudioUnitComponentManager) TagNames 

func (a AVAudioUnitComponentManager) TagNames() []string

An array of all tags the audio unit associates with the current user, and the system tags the audio units define.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponentManager/tagNames

type AVAudioUnitComponentManagerClass 

type AVAudioUnitComponentManagerClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitComponentManagerClass 

func GetAVAudioUnitComponentManagerClass() AVAudioUnitComponentManagerClass

GetAVAudioUnitComponentManagerClass returns the class object for AVAudioUnitComponentManager.

func (AVAudioUnitComponentManagerClass) Alloc 

func (ac AVAudioUnitComponentManagerClass) Alloc() AVAudioUnitComponentManager

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitComponentManagerClass) Class 

func (ac AVAudioUnitComponentManagerClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

func (AVAudioUnitComponentManagerClass) SharedAudioUnitComponentManager 

func (_AVAudioUnitComponentManagerClass AVAudioUnitComponentManagerClass) SharedAudioUnitComponentManager() AVAudioUnitComponentManager

Gets the shared component manager instance.

Return Value

The singleton instance of the AVAudioUnitComponentManager object.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponentManager/shared()

type AVAudioUnitDelay 

type AVAudioUnitDelay struct {
	AVAudioUnitEffect
}

An object that implements a delay effect.

Overview

A delay unit delays the input signal by the specified time interval and then blends it with the input signal. You can also control the amount of high-frequency roll-off to simulate the effect of a tape delay.

Getting and setting the delay values

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDelay

func AVAudioUnitDelayFromID 

func AVAudioUnitDelayFromID(id objc.ID) AVAudioUnitDelay

AVAudioUnitDelayFromID constructs a AVAudioUnitDelay from an objc.ID.

An object that implements a delay effect.

func NewAVAudioUnitDelay 

func NewAVAudioUnitDelay() AVAudioUnitDelay

NewAVAudioUnitDelay creates a new AVAudioUnitDelay instance.

func NewAudioUnitDelayWithAudioComponentDescription 

func NewAudioUnitDelayWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitDelay

Creates an audio unit effect object with the specified description.

audioComponentDescription: The description of the audio unit to create.

The `audioComponentDescription` must be one of these types `kAudioUnitType_Effect`, `kAudioUnitType_MusicEffect`, `kAudioUnitType_Panner`, `kAudioUnitType_RemoteEffect`, or `kAudioUnitType_RemoteMusicEffect`.

Return Value

A new AVAudioUnitEffect instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEffect/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitDelay) Autorelease 

func (a AVAudioUnitDelay) Autorelease() AVAudioUnitDelay

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitDelay) DelayTime 

func (a AVAudioUnitDelay) DelayTime() float64

The time for the input signal to reach the output.

Discussion

You specify the delay in seconds. The default value is `1`. The valid range of values is `0` to `2` seconds.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDelay/delayTime

func (AVAudioUnitDelay) Feedback 

func (a AVAudioUnitDelay) Feedback() float32

The amount of the output signal that feeds back into the delay line.

Discussion

You specify the feedback as a percentage. The default value is `50%`. The valid range of values is `-100%` to `100%`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDelay/feedback

func (AVAudioUnitDelay) Init 

func (a AVAudioUnitDelay) Init() AVAudioUnitDelay

Init initializes the instance.

func (AVAudioUnitDelay) LowPassCutoff 

func (a AVAudioUnitDelay) LowPassCutoff() float32

The cutoff frequency above which high frequency content rolls off, in hertz.

Discussion

The default value is `15000 Hz`. The valid range of values is `10 Hz` through `(sampleRate/2)`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDelay/lowPassCutoff

func (AVAudioUnitDelay) SetDelayTime 

func (a AVAudioUnitDelay) SetDelayTime(value float64)

func (AVAudioUnitDelay) SetFeedback 

func (a AVAudioUnitDelay) SetFeedback(value float32)

func (AVAudioUnitDelay) SetLowPassCutoff 

func (a AVAudioUnitDelay) SetLowPassCutoff(value float32)

func (AVAudioUnitDelay) SetWetDryMix 

func (a AVAudioUnitDelay) SetWetDryMix(value float32)

func (AVAudioUnitDelay) WetDryMix 

func (a AVAudioUnitDelay) WetDryMix() float32

The blend of the wet and dry signals.

Discussion

You specify the blend as a percentage. The default value is `100%`. The valid range of values is `0%` through `100%`, where `0%` represents all dry.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDelay/wetDryMix

type AVAudioUnitDelayClass 

type AVAudioUnitDelayClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitDelayClass 

func GetAVAudioUnitDelayClass() AVAudioUnitDelayClass

GetAVAudioUnitDelayClass returns the class object for AVAudioUnitDelay.

func (AVAudioUnitDelayClass) Alloc 

func (ac AVAudioUnitDelayClass) Alloc() AVAudioUnitDelay

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitDelayClass) Class 

func (ac AVAudioUnitDelayClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitDistortion 

type AVAudioUnitDistortion struct {
	AVAudioUnitEffect
}

An object that implements a multistage distortion effect.

Configuring the distortion

Getting and setting the distortion values

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDistortion

func AVAudioUnitDistortionFromID 

func AVAudioUnitDistortionFromID(id objc.ID) AVAudioUnitDistortion

AVAudioUnitDistortionFromID constructs a AVAudioUnitDistortion from an objc.ID.

An object that implements a multistage distortion effect.

func NewAVAudioUnitDistortion 

func NewAVAudioUnitDistortion() AVAudioUnitDistortion

NewAVAudioUnitDistortion creates a new AVAudioUnitDistortion instance.

func NewAudioUnitDistortionWithAudioComponentDescription 

func NewAudioUnitDistortionWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitDistortion

Creates an audio unit effect object with the specified description.

audioComponentDescription: The description of the audio unit to create.

The `audioComponentDescription` must be one of these types `kAudioUnitType_Effect`, `kAudioUnitType_MusicEffect`, `kAudioUnitType_Panner`, `kAudioUnitType_RemoteEffect`, or `kAudioUnitType_RemoteMusicEffect`.

Return Value

A new AVAudioUnitEffect instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEffect/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitDistortion) Autorelease 

func (a AVAudioUnitDistortion) Autorelease() AVAudioUnitDistortion

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitDistortion) Init 

func (a AVAudioUnitDistortion) Init() AVAudioUnitDistortion

Init initializes the instance.

func (AVAudioUnitDistortion) LoadFactoryPreset 

func (a AVAudioUnitDistortion) LoadFactoryPreset(preset AVAudioUnitDistortionPreset)

Configures the audio distortion unit by loading a distortion preset.

preset: The distortion preset.

Discussion

For more information about possible values for `preset`, see AVAudioUnitDistortionPreset. The default value is AVAudioUnitDistortionPresetDrumsBitBrush.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDistortion/loadFactoryPreset(_:)

func (AVAudioUnitDistortion) PreGain 

func (a AVAudioUnitDistortion) PreGain() float32

The gain that the audio unit applies to the signal before distortion, in decibels.

Discussion

The default value is `-6 dB`. The valid range of values is `-80 dB` to `20 dB`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDistortion/preGain

func (AVAudioUnitDistortion) SetPreGain 

func (a AVAudioUnitDistortion) SetPreGain(value float32)

func (AVAudioUnitDistortion) SetWetDryMix 

func (a AVAudioUnitDistortion) SetWetDryMix(value float32)

func (AVAudioUnitDistortion) WetDryMix 

func (a AVAudioUnitDistortion) WetDryMix() float32

The blend of the distorted and dry signals.

Discussion

You specify the blend as a percentage. The default value is `50%`. The valid range is `0%` through `100%`, where `0` represents all dry.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDistortion/wetDryMix

type AVAudioUnitDistortionClass 

type AVAudioUnitDistortionClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitDistortionClass 

func GetAVAudioUnitDistortionClass() AVAudioUnitDistortionClass

GetAVAudioUnitDistortionClass returns the class object for AVAudioUnitDistortion.

func (AVAudioUnitDistortionClass) Alloc 

func (ac AVAudioUnitDistortionClass) Alloc() AVAudioUnitDistortion

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitDistortionClass) Class 

func (ac AVAudioUnitDistortionClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitDistortionPreset 

type AVAudioUnitDistortionPreset int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDistortionPreset 

const (
	// AVAudioUnitDistortionPresetDrumsBitBrush: A preset that represents a bit brush drums distortion.
	AVAudioUnitDistortionPresetDrumsBitBrush AVAudioUnitDistortionPreset = 0
	// AVAudioUnitDistortionPresetDrumsBufferBeats: A preset that represents a buffer beat drums distortion.
	AVAudioUnitDistortionPresetDrumsBufferBeats AVAudioUnitDistortionPreset = 1
	// AVAudioUnitDistortionPresetDrumsLoFi: A preset that represents a low fidelity drums distortion.
	AVAudioUnitDistortionPresetDrumsLoFi AVAudioUnitDistortionPreset = 2
	// AVAudioUnitDistortionPresetMultiBrokenSpeaker: A preset that represents a broken speaker distortion.
	AVAudioUnitDistortionPresetMultiBrokenSpeaker AVAudioUnitDistortionPreset = 3
	// AVAudioUnitDistortionPresetMultiCellphoneConcert: A preset that represents a cellphone concert distortion.
	AVAudioUnitDistortionPresetMultiCellphoneConcert AVAudioUnitDistortionPreset = 4
	// AVAudioUnitDistortionPresetMultiDecimated1: A preset that represents a variant of the decimated distortion.
	AVAudioUnitDistortionPresetMultiDecimated1 AVAudioUnitDistortionPreset = 5
	// AVAudioUnitDistortionPresetMultiDecimated2: A preset that represents a variant of the decimated distortion.
	AVAudioUnitDistortionPresetMultiDecimated2 AVAudioUnitDistortionPreset = 6
	// AVAudioUnitDistortionPresetMultiDecimated3: A preset that represents a variant of the decimated distortion.
	AVAudioUnitDistortionPresetMultiDecimated3 AVAudioUnitDistortionPreset = 7
	// AVAudioUnitDistortionPresetMultiDecimated4: A preset that represents a variant of the decimated distortion.
	AVAudioUnitDistortionPresetMultiDecimated4 AVAudioUnitDistortionPreset = 8
	// AVAudioUnitDistortionPresetMultiDistortedCubed: A preset that represents a distorted cubed distortion.
	AVAudioUnitDistortionPresetMultiDistortedCubed AVAudioUnitDistortionPreset = 10
	// AVAudioUnitDistortionPresetMultiDistortedFunk: A preset that represents a distorted funk distortion.
	AVAudioUnitDistortionPresetMultiDistortedFunk AVAudioUnitDistortionPreset = 9
	// AVAudioUnitDistortionPresetMultiDistortedSquared: A preset that represents a distorted squared distortion.
	AVAudioUnitDistortionPresetMultiDistortedSquared AVAudioUnitDistortionPreset = 11
	// AVAudioUnitDistortionPresetMultiEcho1: A preset that represents a variant of an echo distortion.
	AVAudioUnitDistortionPresetMultiEcho1 AVAudioUnitDistortionPreset = 12
	// AVAudioUnitDistortionPresetMultiEcho2: A preset that represents a variant of an echo distortion.
	AVAudioUnitDistortionPresetMultiEcho2 AVAudioUnitDistortionPreset = 13
	// AVAudioUnitDistortionPresetMultiEchoTight1: A preset that represents a variant of a tight echo distortion.
	AVAudioUnitDistortionPresetMultiEchoTight1 AVAudioUnitDistortionPreset = 14
	// AVAudioUnitDistortionPresetMultiEchoTight2: A preset that represents a variant of a tight echo distortion.
	AVAudioUnitDistortionPresetMultiEchoTight2 AVAudioUnitDistortionPreset = 15
	// AVAudioUnitDistortionPresetMultiEverythingIsBroken: A preset that represents an everything-is-broken distortion.
	AVAudioUnitDistortionPresetMultiEverythingIsBroken AVAudioUnitDistortionPreset = 16
	// AVAudioUnitDistortionPresetSpeechAlienChatter: A preset that represents an alien chatter distortion.
	AVAudioUnitDistortionPresetSpeechAlienChatter AVAudioUnitDistortionPreset = 17
	// AVAudioUnitDistortionPresetSpeechCosmicInterference: A preset that represents a cosmic interference distortion.
	AVAudioUnitDistortionPresetSpeechCosmicInterference AVAudioUnitDistortionPreset = 18
	// AVAudioUnitDistortionPresetSpeechGoldenPi: A preset that represents a golden pi distortion.
	AVAudioUnitDistortionPresetSpeechGoldenPi AVAudioUnitDistortionPreset = 19
	// AVAudioUnitDistortionPresetSpeechRadioTower: A preset that represents a radio tower distortion.
	AVAudioUnitDistortionPresetSpeechRadioTower AVAudioUnitDistortionPreset = 20
	// AVAudioUnitDistortionPresetSpeechWaves: A preset that represents a speech wave distortion.
	AVAudioUnitDistortionPresetSpeechWaves AVAudioUnitDistortionPreset = 21
)

func (AVAudioUnitDistortionPreset) String 

func (e AVAudioUnitDistortionPreset) String() string

type AVAudioUnitEQ 

type AVAudioUnitEQ struct {
	AVAudioUnitEffect
}

An object that implements a multiband equalizer.

Overview

The AVAudioUnitEQFilterParameters class encapsulates the filter parameters that the AVAudioUnitEQ.Bands property array returns.

Creating an equalizer

Getting and setting the equalizer values

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQ

func AVAudioUnitEQFromID 

func AVAudioUnitEQFromID(id objc.ID) AVAudioUnitEQ

AVAudioUnitEQFromID constructs a AVAudioUnitEQ from an objc.ID.

An object that implements a multiband equalizer.

func NewAVAudioUnitEQ 

func NewAVAudioUnitEQ() AVAudioUnitEQ

NewAVAudioUnitEQ creates a new AVAudioUnitEQ instance.

func NewAudioUnitEQWithAudioComponentDescription 

func NewAudioUnitEQWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitEQ

Creates an audio unit effect object with the specified description.

audioComponentDescription: The description of the audio unit to create.

The `audioComponentDescription` must be one of these types `kAudioUnitType_Effect`, `kAudioUnitType_MusicEffect`, `kAudioUnitType_Panner`, `kAudioUnitType_RemoteEffect`, or `kAudioUnitType_RemoteMusicEffect`.

Return Value

A new AVAudioUnitEffect instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEffect/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func NewAudioUnitEQWithNumberOfBands 

func NewAudioUnitEQWithNumberOfBands(numberOfBands uint) AVAudioUnitEQ

Creates an audio unit equalizer object with the specified number of bands.

numberOfBands: The number of bands that the equalizer creates.

Return Value

A new AVAudioUnitEQ instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQ/init(numberOfBands:)

func (AVAudioUnitEQ) Autorelease 

func (a AVAudioUnitEQ) Autorelease() AVAudioUnitEQ

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitEQ) Bands 

func (a AVAudioUnitEQ) Bands() []AVAudioUnitEQFilterParameters

An array of equalizer filter parameters.

Discussion

The number of elements in the array is equal to the number of bands.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQ/bands

func (AVAudioUnitEQ) GlobalGain 

func (a AVAudioUnitEQ) GlobalGain() float32

The overall gain adjustment that the audio unit applies to the signal, in decibels.

Discussion

The default value is `0 db`. The valid range of values is `-96 db` to `24 db`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQ/globalGain

func (AVAudioUnitEQ) Init 

func (a AVAudioUnitEQ) Init() AVAudioUnitEQ

Init initializes the instance.

func (AVAudioUnitEQ) InitWithNumberOfBands 

func (a AVAudioUnitEQ) InitWithNumberOfBands(numberOfBands uint) AVAudioUnitEQ

Creates an audio unit equalizer object with the specified number of bands.

numberOfBands: The number of bands that the equalizer creates.

Return Value

A new AVAudioUnitEQ instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQ/init(numberOfBands:)

func (AVAudioUnitEQ) SetGlobalGain 

func (a AVAudioUnitEQ) SetGlobalGain(value float32)

type AVAudioUnitEQClass 

type AVAudioUnitEQClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitEQClass 

func GetAVAudioUnitEQClass() AVAudioUnitEQClass

GetAVAudioUnitEQClass returns the class object for AVAudioUnitEQ.

func (AVAudioUnitEQClass) Alloc 

func (ac AVAudioUnitEQClass) Alloc() AVAudioUnitEQ

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitEQClass) Class 

func (ac AVAudioUnitEQClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitEQFilterParameters 

type AVAudioUnitEQFilterParameters struct {
	objectivec.Object
}

An object that encapsulates the parameters that the equalizer uses.

Overview

Getting and Setting Equalizer Filter Parameters

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQFilterParameters

func AVAudioUnitEQFilterParametersFromID 

func AVAudioUnitEQFilterParametersFromID(id objc.ID) AVAudioUnitEQFilterParameters

AVAudioUnitEQFilterParametersFromID constructs a AVAudioUnitEQFilterParameters from an objc.ID.

An object that encapsulates the parameters that the equalizer uses.

func NewAVAudioUnitEQFilterParameters 

func NewAVAudioUnitEQFilterParameters() AVAudioUnitEQFilterParameters

NewAVAudioUnitEQFilterParameters creates a new AVAudioUnitEQFilterParameters instance.

func (AVAudioUnitEQFilterParameters) Autorelease 

func (a AVAudioUnitEQFilterParameters) Autorelease() AVAudioUnitEQFilterParameters

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitEQFilterParameters) Bands 

func (a AVAudioUnitEQFilterParameters) Bands() IAVAudioUnitEQFilterParameters

An array of equalizer filter parameters.

See: https://developer.apple.com/documentation/avfaudio/avaudiouniteq/bands

func (AVAudioUnitEQFilterParameters) Bandwidth 

func (a AVAudioUnitEQFilterParameters) Bandwidth() float32

The bandwidth of the equalizer filter, in octaves.

Discussion

The value range of values is `0.05` to `5.0` octaves.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQFilterParameters/bandwidth

func (AVAudioUnitEQFilterParameters) Bypass 

func (a AVAudioUnitEQFilterParameters) Bypass() bool

The bypass state of the equalizer filter band.

Discussion

true if the bypass is active; otherwise, false.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQFilterParameters/bypass

func (AVAudioUnitEQFilterParameters) FilterType 

func (a AVAudioUnitEQFilterParameters) FilterType() AVAudioUnitEQFilterType

The equalizer filter type.

Discussion

The default value is AVAudioUnitEQFilterTypeParametric.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQFilterParameters/filterType

func (AVAudioUnitEQFilterParameters) Frequency 

func (a AVAudioUnitEQFilterParameters) Frequency() float32

The frequency of the equalizer filter, in hertz.

Discussion

The valid range of values is `20 Hz` through `(SampleRate/2)`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQFilterParameters/frequency

func (AVAudioUnitEQFilterParameters) Gain 

func (a AVAudioUnitEQFilterParameters) Gain() float32

The gain of the equalizer filter, in decibels.

Discussion

The default value is `0 dB`. The valid range of values is `-96 dB` through `24 dB`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQFilterParameters/gain

func (AVAudioUnitEQFilterParameters) GlobalGain 

func (a AVAudioUnitEQFilterParameters) GlobalGain() float32

The overall gain adjustment that the audio unit applies to the signal, in decibels.

See: https://developer.apple.com/documentation/avfaudio/avaudiouniteq/globalgain

func (AVAudioUnitEQFilterParameters) Init 

func (a AVAudioUnitEQFilterParameters) Init() AVAudioUnitEQFilterParameters

Init initializes the instance.

func (AVAudioUnitEQFilterParameters) SetBands 

func (a AVAudioUnitEQFilterParameters) SetBands(value IAVAudioUnitEQFilterParameters)

func (AVAudioUnitEQFilterParameters) SetBandwidth 

func (a AVAudioUnitEQFilterParameters) SetBandwidth(value float32)

func (AVAudioUnitEQFilterParameters) SetBypass 

func (a AVAudioUnitEQFilterParameters) SetBypass(value bool)

func (AVAudioUnitEQFilterParameters) SetFilterType 

func (a AVAudioUnitEQFilterParameters) SetFilterType(value AVAudioUnitEQFilterType)

func (AVAudioUnitEQFilterParameters) SetFrequency 

func (a AVAudioUnitEQFilterParameters) SetFrequency(value float32)

func (AVAudioUnitEQFilterParameters) SetGain 

func (a AVAudioUnitEQFilterParameters) SetGain(value float32)

func (AVAudioUnitEQFilterParameters) SetGlobalGain 

func (a AVAudioUnitEQFilterParameters) SetGlobalGain(value float32)

type AVAudioUnitEQFilterParametersClass 

type AVAudioUnitEQFilterParametersClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitEQFilterParametersClass 

func GetAVAudioUnitEQFilterParametersClass() AVAudioUnitEQFilterParametersClass

GetAVAudioUnitEQFilterParametersClass returns the class object for AVAudioUnitEQFilterParameters.

func (AVAudioUnitEQFilterParametersClass) Alloc 

func (ac AVAudioUnitEQFilterParametersClass) Alloc() AVAudioUnitEQFilterParameters

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitEQFilterParametersClass) Class 

func (ac AVAudioUnitEQFilterParametersClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitEQFilterType 

type AVAudioUnitEQFilterType int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQFilterType 

const (
	// AVAudioUnitEQFilterTypeBandPass: A type that represents a bandpass filter.
	AVAudioUnitEQFilterTypeBandPass AVAudioUnitEQFilterType = 5
	// AVAudioUnitEQFilterTypeBandStop: A type that represents a band-stop filter, also known as a notch filter.
	AVAudioUnitEQFilterTypeBandStop AVAudioUnitEQFilterType = 6
	// AVAudioUnitEQFilterTypeHighPass: A type that represents a simple Butterworth second-order high-pass filter.
	AVAudioUnitEQFilterTypeHighPass AVAudioUnitEQFilterType = 2
	// AVAudioUnitEQFilterTypeHighShelf: A type that represents a high-shelf filter.
	AVAudioUnitEQFilterTypeHighShelf AVAudioUnitEQFilterType = 8
	// AVAudioUnitEQFilterTypeLowPass: A type that represents a simple Butterworth second-order low-pass filter.
	AVAudioUnitEQFilterTypeLowPass AVAudioUnitEQFilterType = 1
	// AVAudioUnitEQFilterTypeLowShelf: A type that represents a low-shelf filter.
	AVAudioUnitEQFilterTypeLowShelf AVAudioUnitEQFilterType = 7
	// AVAudioUnitEQFilterTypeParametric: A type that represents a parametric filter that derives from a Butterworth analog prototype.
	AVAudioUnitEQFilterTypeParametric AVAudioUnitEQFilterType = 0
	// AVAudioUnitEQFilterTypeResonantHighPass: A type that represents a high-pass filter with resonance support using the bandwidth parameter.
	AVAudioUnitEQFilterTypeResonantHighPass AVAudioUnitEQFilterType = 4
	// AVAudioUnitEQFilterTypeResonantHighShelf: A type that represents a high-shelf filter with resonance support using the bandwidth parameter.
	AVAudioUnitEQFilterTypeResonantHighShelf AVAudioUnitEQFilterType = 10
	// AVAudioUnitEQFilterTypeResonantLowPass: A type that represents a low-pass filter with resonance support using the bandwidth parameter.
	AVAudioUnitEQFilterTypeResonantLowPass AVAudioUnitEQFilterType = 3
	// AVAudioUnitEQFilterTypeResonantLowShelf: A type that represents a low-shelf filter with resonance support using the bandwidth parameter.
	AVAudioUnitEQFilterTypeResonantLowShelf AVAudioUnitEQFilterType = 9
)

func (AVAudioUnitEQFilterType) String 

func (e AVAudioUnitEQFilterType) String() string

type AVAudioUnitEffect 

type AVAudioUnitEffect struct {
	AVAudioUnit
}

An object that processes audio in real time.

Overview

This processing uses AudioUnit of type effect, music effect, panner, remote effect, or remote music effect. These effects run in real time and process some number of audio input samples to produce several audio output samples. A delay unit is an example of an effect unit.

Creating an audio effect

Getting the bypass state

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEffect

func AVAudioUnitEffectFromID 

func AVAudioUnitEffectFromID(id objc.ID) AVAudioUnitEffect

AVAudioUnitEffectFromID constructs a AVAudioUnitEffect from an objc.ID.

An object that processes audio in real time.

func NewAVAudioUnitEffect 

func NewAVAudioUnitEffect() AVAudioUnitEffect

NewAVAudioUnitEffect creates a new AVAudioUnitEffect instance.

func NewAudioUnitEffectWithAudioComponentDescription 

func NewAudioUnitEffectWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitEffect

Creates an audio unit effect object with the specified description.

audioComponentDescription: The description of the audio unit to create.

The `audioComponentDescription` must be one of these types `kAudioUnitType_Effect`, `kAudioUnitType_MusicEffect`, `kAudioUnitType_Panner`, `kAudioUnitType_RemoteEffect`, or `kAudioUnitType_RemoteMusicEffect`.

Return Value

A new AVAudioUnitEffect instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEffect/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitEffect) Autorelease 

func (a AVAudioUnitEffect) Autorelease() AVAudioUnitEffect

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitEffect) Bypass 

func (a AVAudioUnitEffect) Bypass() bool

The bypass state of the audio unit.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEffect/bypass

func (AVAudioUnitEffect) Init 

func (a AVAudioUnitEffect) Init() AVAudioUnitEffect

Init initializes the instance.

func (AVAudioUnitEffect) InitWithAudioComponentDescription 

func (a AVAudioUnitEffect) InitWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitEffect

Creates an audio unit effect object with the specified description.

audioComponentDescription: The description of the audio unit to create.

The `audioComponentDescription` must be one of these types `kAudioUnitType_Effect`, `kAudioUnitType_MusicEffect`, `kAudioUnitType_Panner`, `kAudioUnitType_RemoteEffect`, or `kAudioUnitType_RemoteMusicEffect`.

audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

Return Value

A new AVAudioUnitEffect instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEffect/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitEffect) SetBypass 

func (a AVAudioUnitEffect) SetBypass(value bool)

type AVAudioUnitEffectClass 

type AVAudioUnitEffectClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitEffectClass 

func GetAVAudioUnitEffectClass() AVAudioUnitEffectClass

GetAVAudioUnitEffectClass returns the class object for AVAudioUnitEffect.

func (AVAudioUnitEffectClass) Alloc 

func (ac AVAudioUnitEffectClass) Alloc() AVAudioUnitEffect

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitEffectClass) Class 

func (ac AVAudioUnitEffectClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitErrorHandler 

type AVAudioUnitErrorHandler = func(*AVAudioUnit, error)

AVAudioUnitErrorHandler handles A handler the framework calls in an arbitrary thread context when creation completes. The error can be type-asserted to *foundation.NSError for Domain, Code, and UserInfo.

Used by:

  • [AVAudioUnit.InstantiateWithComponentDescriptionOptionsCompletionHandler]

type AVAudioUnitGenerator 

type AVAudioUnitGenerator struct {
	AVAudioUnit
}

An object that generates audio output.

Overview

A generator represents an AudioUnit of type `kAudioUnitType_Generator` or `kAudioUnitType_RemoteGenerator`. A generator has no audio input, but produces audio output. An example is a tone generator.

Creating an audio unit generator

Getting and setting the bypass status

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitGenerator

func AVAudioUnitGeneratorFromID 

func AVAudioUnitGeneratorFromID(id objc.ID) AVAudioUnitGenerator

AVAudioUnitGeneratorFromID constructs a AVAudioUnitGenerator from an objc.ID.

An object that generates audio output.

func NewAVAudioUnitGenerator 

func NewAVAudioUnitGenerator() AVAudioUnitGenerator

NewAVAudioUnitGenerator creates a new AVAudioUnitGenerator instance.

func NewAudioUnitGeneratorWithAudioComponentDescription 

func NewAudioUnitGeneratorWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitGenerator

Creates a generator audio unit with the specified description.

audioComponentDescription: The audio component description.

Return Value

A new AVAudioUnitGenerator instance.

Discussion

The AudioComponentDescription structure `componentType` field must be `kAudioUnitType_Generator` or kAudioUnitType_RemoteGenerator.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitGenerator/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitGenerator) Autorelease 

func (a AVAudioUnitGenerator) Autorelease() AVAudioUnitGenerator

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitGenerator) Bypass 

func (a AVAudioUnitGenerator) Bypass() bool

The bypass state of the audio unit.

Discussion

If true, the audio unit bypasses audio processing.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitGenerator/bypass

func (AVAudioUnitGenerator) DestinationForMixerBus 

func (a AVAudioUnitGenerator) DestinationForMixerBus(mixer IAVAudioNode, bus AVAudioNodeBus) IAVAudioMixingDestination

Gets the audio mixing destination object that corresponds to the specified mixer node and input bus.

mixer: The mixer to get destination details for.

bus: The input bus.

Return Value

Returns `self` if the specified mixer or input bus matches its connection point. If the mixer or input bus doesn’t match its connection point, or if the source node isn’t in a connected state to the mixer or input bus, the method returns `nil.`

Discussion

When you connect a source node to multiple mixers downstream, setting AVAudioMixing properties directly on the source node applies the change to all of them. Use this method to get the corresponding AVAudioMixingDestination for a specific mixer. Properties set on individual destination instances don’t reflect at the source node level.

If there’s any disconnection between the source and mixer nodes, the return value can be invalid. Fetch the return value every time you want to set or get properties on a specific mixer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/destination(forMixer:bus:)

func (AVAudioUnitGenerator) Init 

func (a AVAudioUnitGenerator) Init() AVAudioUnitGenerator

Init initializes the instance.

func (AVAudioUnitGenerator) InitWithAudioComponentDescription 

func (a AVAudioUnitGenerator) InitWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitGenerator

Creates a generator audio unit with the specified description.

audioComponentDescription: The audio component description.

audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

Return Value

A new AVAudioUnitGenerator instance.

Discussion

The AudioComponentDescription structure `componentType` field must be `kAudioUnitType_Generator` or kAudioUnitType_RemoteGenerator.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitGenerator/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitGenerator) Obstruction 

func (a AVAudioUnitGenerator) Obstruction() float32

A value that simulates filtering of the direct path of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks only the direct path of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudioUnitGenerator) Occlusion 

func (a AVAudioUnitGenerator) Occlusion() float32

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks the direct and reverb paths of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudioUnitGenerator) Pan 

func (a AVAudioUnitGenerator) Pan() float32

The bus’s stereo pan.

Discussion

The default value is `0.0`, and the range of valid values is `-1.0` to `1.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioUnitGenerator) PointSourceInHeadMode 

func (a AVAudioUnitGenerator) PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudioUnitGenerator) Position 

func (a AVAudioUnitGenerator) Position() AVAudio3DPoint

The location of the source in the 3D environment.

Discussion

The system specifies the coordinates in meters. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudioUnitGenerator) Rate 

func (a AVAudioUnitGenerator) Rate() float32

A value that changes the playback rate of the input signal.

Discussion

A value of `2.0` results in the output audio playing one octave higher. A value of `0.5` results in the output audio playing one octave lower.

The default value is `1.0`, and the range of valid values is `0.5` to `2.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudioUnitGenerator) RenderingAlgorithm 

func (a AVAudioUnitGenerator) RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

The type of rendering algorithm the mixer uses.

Discussion

Depending on the current output format of the AVAudioEnvironmentNode instance, the system may only support a subset of the rendering algorithms. You can retrieve an array of valid rendering algorithms by calling the [ApplicableRenderingAlgorithms] function of the AVAudioEnvironmentNode instance.

The default rendering algorithm is AVAudio3DMixingRenderingAlgorithmEqualPowerPanning. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudioUnitGenerator) ReverbBlend 

func (a AVAudioUnitGenerator) ReverbBlend() float32

A value that controls the blend of dry and reverb processed audio.

Discussion

This property controls the amount of the source’s audio that the AVAudioEnvironmentNode instance processes. A value of `0.5` results in an equal blend of dry and processed (wet) audio.

The default is `0.0`, and the range of valid values is `0.0` (completely dry) to `1.0` (completely wet). Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudioUnitGenerator) SetBypass 

func (a AVAudioUnitGenerator) SetBypass(value bool)

func (AVAudioUnitGenerator) SetObstruction 

func (a AVAudioUnitGenerator) SetObstruction(value float32)

func (AVAudioUnitGenerator) SetOcclusion 

func (a AVAudioUnitGenerator) SetOcclusion(value float32)

func (AVAudioUnitGenerator) SetPan 

func (a AVAudioUnitGenerator) SetPan(value float32)

func (AVAudioUnitGenerator) SetPointSourceInHeadMode 

func (a AVAudioUnitGenerator) SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

func (AVAudioUnitGenerator) SetPosition 

func (a AVAudioUnitGenerator) SetPosition(value AVAudio3DPoint)

func (AVAudioUnitGenerator) SetRate 

func (a AVAudioUnitGenerator) SetRate(value float32)

func (AVAudioUnitGenerator) SetRenderingAlgorithm 

func (a AVAudioUnitGenerator) SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)

func (AVAudioUnitGenerator) SetReverbBlend 

func (a AVAudioUnitGenerator) SetReverbBlend(value float32)

func (AVAudioUnitGenerator) SetSourceMode 

func (a AVAudioUnitGenerator) SetSourceMode(value AVAudio3DMixingSourceMode)

func (AVAudioUnitGenerator) SetVolume 

func (a AVAudioUnitGenerator) SetVolume(value float32)

func (AVAudioUnitGenerator) SourceMode 

func (a AVAudioUnitGenerator) SourceMode() AVAudio3DMixingSourceMode

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudioUnitGenerator) Volume 

func (a AVAudioUnitGenerator) Volume() float32

The bus’s input volume.

Discussion

The default value is `1.0`, and the range of valid values is `0.0` to `1.0`. Only the AVAudioEnvironmentNode and the AVAudioMixerNode implement this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume

type AVAudioUnitGeneratorClass 

type AVAudioUnitGeneratorClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitGeneratorClass 

func GetAVAudioUnitGeneratorClass() AVAudioUnitGeneratorClass

GetAVAudioUnitGeneratorClass returns the class object for AVAudioUnitGenerator.

func (AVAudioUnitGeneratorClass) Alloc 

func (ac AVAudioUnitGeneratorClass) Alloc() AVAudioUnitGenerator

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitGeneratorClass) Class 

func (ac AVAudioUnitGeneratorClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitMIDIInstrument 

type AVAudioUnitMIDIInstrument struct {
	AVAudioUnit
}

An object that represents music devices or remote instruments.

Overview

Use an AVAudioUnitMIDIInstrument in a chain that processes real-time (live) input and has the general concept of music events; for example, notes.

Creating a MIDI instrument

Sending information to the MIDI instrument

Starting and stopping play

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument

func AVAudioUnitMIDIInstrumentFromID 

func AVAudioUnitMIDIInstrumentFromID(id objc.ID) AVAudioUnitMIDIInstrument

AVAudioUnitMIDIInstrumentFromID constructs a AVAudioUnitMIDIInstrument from an objc.ID.

An object that represents music devices or remote instruments.

func NewAVAudioUnitMIDIInstrument 

func NewAVAudioUnitMIDIInstrument() AVAudioUnitMIDIInstrument

NewAVAudioUnitMIDIInstrument creates a new AVAudioUnitMIDIInstrument instance.

func NewAudioUnitMIDIInstrumentWithAudioComponentDescription 

func NewAudioUnitMIDIInstrumentWithAudioComponentDescription(description objectivec.IObject) AVAudioUnitMIDIInstrument

Creates a MIDI instrument audio unit with the component description you specify.

description: The description of the audio component.

Return Value

A new AVAudioUnitMIDIInstrument instance.

Discussion

The component type must be `kAudioUnitType_MusicDevice` or `kAudioUnitType_RemoteInstrument`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/init(audioComponentDescription:) description is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitMIDIInstrument) Autorelease 

func (a AVAudioUnitMIDIInstrument) Autorelease() AVAudioUnitMIDIInstrument

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitMIDIInstrument) DestinationForMixerBus 

func (a AVAudioUnitMIDIInstrument) DestinationForMixerBus(mixer IAVAudioNode, bus AVAudioNodeBus) IAVAudioMixingDestination

Gets the audio mixing destination object that corresponds to the specified mixer node and input bus.

mixer: The mixer to get destination details for.

bus: The input bus.

Return Value

Returns `self` if the specified mixer or input bus matches its connection point. If the mixer or input bus doesn’t match its connection point, or if the source node isn’t in a connected state to the mixer or input bus, the method returns `nil.`

Discussion

When you connect a source node to multiple mixers downstream, setting AVAudioMixing properties directly on the source node applies the change to all of them. Use this method to get the corresponding AVAudioMixingDestination for a specific mixer. Properties set on individual destination instances don’t reflect at the source node level.

If there’s any disconnection between the source and mixer nodes, the return value can be invalid. Fetch the return value every time you want to set or get properties on a specific mixer.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/destination(forMixer:bus:)

func (AVAudioUnitMIDIInstrument) Init 

func (a AVAudioUnitMIDIInstrument) Init() AVAudioUnitMIDIInstrument

Init initializes the instance.

func (AVAudioUnitMIDIInstrument) InitWithAudioComponentDescription 

func (a AVAudioUnitMIDIInstrument) InitWithAudioComponentDescription(description objectivec.IObject) AVAudioUnitMIDIInstrument

Creates a MIDI instrument audio unit with the component description you specify.

description: The description of the audio component.

description is a [audiotoolbox.AudioComponentDescription].

Return Value

A new AVAudioUnitMIDIInstrument instance.

Discussion

The component type must be `kAudioUnitType_MusicDevice` or `kAudioUnitType_RemoteInstrument`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/init(audioComponentDescription:) description is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitMIDIInstrument) Obstruction 

func (a AVAudioUnitMIDIInstrument) Obstruction() float32

A value that simulates filtering of the direct path of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks only the direct path of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/obstruction

func (AVAudioUnitMIDIInstrument) Occlusion 

func (a AVAudioUnitMIDIInstrument) Occlusion() float32

A value that simulates filtering of the direct and reverb paths of sound due to an obstacle.

Discussion

The value of `obstruction` is in decibels. The system blocks the direct and reverb paths of sound between the source and listener.

The default value is `0.0`, and the range of valid values is `-100` to `0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/occlusion

func (AVAudioUnitMIDIInstrument) Pan 

func (a AVAudioUnitMIDIInstrument) Pan() float32

The bus’s stereo pan.

Discussion

The default value is `0.0`, and the range of valid values is `-1.0` to `1.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioStereoMixing/pan

func (AVAudioUnitMIDIInstrument) PointSourceInHeadMode 

func (a AVAudioUnitMIDIInstrument) PointSourceInHeadMode() AVAudio3DMixingPointSourceInHeadMode

The in-head mode for a point source.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/pointSourceInHeadMode

func (AVAudioUnitMIDIInstrument) Position 

func (a AVAudioUnitMIDIInstrument) Position() AVAudio3DPoint

The location of the source in the 3D environment.

Discussion

The system specifies the coordinates in meters. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/position

func (AVAudioUnitMIDIInstrument) Rate 

func (a AVAudioUnitMIDIInstrument) Rate() float32

A value that changes the playback rate of the input signal.

Discussion

A value of `2.0` results in the output audio playing one octave higher. A value of `0.5` results in the output audio playing one octave lower.

The default value is `1.0`, and the range of valid values is `0.5` to `2.0`. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/rate

func (AVAudioUnitMIDIInstrument) RenderingAlgorithm 

func (a AVAudioUnitMIDIInstrument) RenderingAlgorithm() AVAudio3DMixingRenderingAlgorithm

The type of rendering algorithm the mixer uses.

Discussion

Depending on the current output format of the AVAudioEnvironmentNode instance, the system may only support a subset of the rendering algorithms. You can retrieve an array of valid rendering algorithms by calling the [ApplicableRenderingAlgorithms] function of the AVAudioEnvironmentNode instance.

The default rendering algorithm is AVAudio3DMixingRenderingAlgorithmEqualPowerPanning. Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/renderingAlgorithm

func (AVAudioUnitMIDIInstrument) ReverbBlend 

func (a AVAudioUnitMIDIInstrument) ReverbBlend() float32

A value that controls the blend of dry and reverb processed audio.

Discussion

This property controls the amount of the source’s audio that the AVAudioEnvironmentNode instance processes. A value of `0.5` results in an equal blend of dry and processed (wet) audio.

The default is `0.0`, and the range of valid values is `0.0` (completely dry) to `1.0` (completely wet). Only the AVAudioEnvironmentNode class implements this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/reverbBlend

func (AVAudioUnitMIDIInstrument) SendControllerWithValueOnChannel 

func (a AVAudioUnitMIDIInstrument) SendControllerWithValueOnChannel(controller uint8, value uint8, channel uint8)

Sends a MIDI controller event to the instrument.

controller: Specifies a standard MIDI controller number. The valid range is `0` to `127`.

value: Value for the controller. The valid range is `0` to `127`.

channel: The channel number to send the event to. The valid range is `0` to `15`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/sendController(_:withValue:onChannel:)

func (AVAudioUnitMIDIInstrument) SendMIDIEventData1 

func (a AVAudioUnitMIDIInstrument) SendMIDIEventData1(midiStatus uint8, data1 uint8)

Sends a MIDI event which contains one data byte to the instrument.

midiStatus: The status value of the MIDI event.

data1: The data byte of the MIDI event.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/sendMIDIEvent(_:data1:)

func (AVAudioUnitMIDIInstrument) SendMIDIEventData1Data2 

func (a AVAudioUnitMIDIInstrument) SendMIDIEventData1Data2(midiStatus uint8, data1 uint8, data2 uint8)

Sends a MIDI event which contains two data bytes to the instrument.

midiStatus: The status value of the MIDI event.

data1: The first data byte of the MIDI event.

data2: The first data byte of the MIDI event.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/sendMIDIEvent(_:data1:data2:)

func (AVAudioUnitMIDIInstrument) SendMIDIEventList 

func (a AVAudioUnitMIDIInstrument) SendMIDIEventList(eventList objectivec.IObject)

Sends a MIDI event list to the instrument.

eventList: The MIDI event list.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/send(_:)

func (AVAudioUnitMIDIInstrument) SendMIDISysExEvent 

func (a AVAudioUnitMIDIInstrument) SendMIDISysExEvent(midiData foundation.INSData)

Sends a MIDI System Exclusive event to the instrument.

midiData: The system exclusive data you want to send to the instrument.

Discussion

The `midiData` parameter should contain the complete [SysEx] data, including start (F0) and termination (F7) bytes.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/sendMIDISysExEvent(_:)

func (AVAudioUnitMIDIInstrument) SendPitchBendOnChannel 

func (a AVAudioUnitMIDIInstrument) SendPitchBendOnChannel(pitchbend uint16, channel uint8)

Sends a MIDI Pitch Bend event to the instrument.

pitchbend: Value of the pitchbend. The valid range of values is `0` to `16383`.

channel: The channel number to send the event to. The valid range of values is `0` to `15`.

Discussion

If this method isn’t invoked, then the system uses the default pitch bend value of `8192` (no pitch).

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/sendPitchBend(_:onChannel:)

func (AVAudioUnitMIDIInstrument) SendPressureForKeyWithValueOnChannel 

func (a AVAudioUnitMIDIInstrument) SendPressureForKeyWithValueOnChannel(key uint8, value uint8, channel uint8)

Sends a MIDI Polyphonic key pressure event to the instrument.

key: The key (note) number to which the pressure event applies. The valid range is `0` to `127`.

value: The value of the pressure. The valid range is `0` to `127`.

channel: The channel number to send the event to. The valid range is `0` to `15`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/sendPressure(forKey:withValue:onChannel:)

func (AVAudioUnitMIDIInstrument) SendPressureOnChannel 

func (a AVAudioUnitMIDIInstrument) SendPressureOnChannel(pressure uint8, channel uint8)

Sends a MIDI channel pressure event to the instrument.

pressure: The value of the pressure. The valid range is `0` to `127`.

channel: The channel number to send the event to. The valid range is `0` to `15`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/sendPressure(_:onChannel:)

func (AVAudioUnitMIDIInstrument) SendProgramChangeBankMSBBankLSBOnChannel 

func (a AVAudioUnitMIDIInstrument) SendProgramChangeBankMSBBankLSBOnChannel(program uint8, bankMSB uint8, bankLSB uint8, channel uint8)

Sends MIDI Program Change and Bank Select events to the instrument.

program: Specifies the program (preset) number within the bank to load. The valid range is `0` to `127`.

bankMSB: Specifies the most significant byte value for the bank to select. The valid range is `0` to `127`.

bankLSB: Specifies the least significant byte value for the bank to select. The valid range is `0` to `127`.

channel: The channel number to send the event to. The valid range is `0` to `15`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/sendProgramChange(_:bankMSB:bankLSB:onChannel:)

func (AVAudioUnitMIDIInstrument) SendProgramChangeOnChannel 

func (a AVAudioUnitMIDIInstrument) SendProgramChangeOnChannel(program uint8, channel uint8)

Sends MIDI Program Change and Bank Select events to the instrument.

program: The program (preset) number within the bank to load. The valid range is `0` to `127`.

channel: The channel number to send the event to. The valid range is `0` to `15`.

Discussion

The system loads the instrument from the bank that was previously set by the MIDI “Bank Select” controller messages (0 and 31). The system uses bank `0` if not previously set.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/sendProgramChange(_:onChannel:)

func (AVAudioUnitMIDIInstrument) SetObstruction 

func (a AVAudioUnitMIDIInstrument) SetObstruction(value float32)

func (AVAudioUnitMIDIInstrument) SetOcclusion 

func (a AVAudioUnitMIDIInstrument) SetOcclusion(value float32)

func (AVAudioUnitMIDIInstrument) SetPan 

func (a AVAudioUnitMIDIInstrument) SetPan(value float32)

func (AVAudioUnitMIDIInstrument) SetPointSourceInHeadMode 

func (a AVAudioUnitMIDIInstrument) SetPointSourceInHeadMode(value AVAudio3DMixingPointSourceInHeadMode)

func (AVAudioUnitMIDIInstrument) SetPosition 

func (a AVAudioUnitMIDIInstrument) SetPosition(value AVAudio3DPoint)

func (AVAudioUnitMIDIInstrument) SetRate 

func (a AVAudioUnitMIDIInstrument) SetRate(value float32)

func (AVAudioUnitMIDIInstrument) SetRenderingAlgorithm 

func (a AVAudioUnitMIDIInstrument) SetRenderingAlgorithm(value AVAudio3DMixingRenderingAlgorithm)

func (AVAudioUnitMIDIInstrument) SetReverbBlend 

func (a AVAudioUnitMIDIInstrument) SetReverbBlend(value float32)

func (AVAudioUnitMIDIInstrument) SetSourceMode 

func (a AVAudioUnitMIDIInstrument) SetSourceMode(value AVAudio3DMixingSourceMode)

func (AVAudioUnitMIDIInstrument) SetVolume 

func (a AVAudioUnitMIDIInstrument) SetVolume(value float32)

func (AVAudioUnitMIDIInstrument) SourceMode 

func (a AVAudioUnitMIDIInstrument) SourceMode() AVAudio3DMixingSourceMode

The source mode for the input bus of the audio environment node.

See: https://developer.apple.com/documentation/AVFAudio/AVAudio3DMixing/sourceMode

func (AVAudioUnitMIDIInstrument) StartNoteWithVelocityOnChannel 

func (a AVAudioUnitMIDIInstrument) StartNoteWithVelocityOnChannel(note uint8, velocity uint8, channel uint8)

Sends a MIDI Note On event to the instrument.

note: The note number (key) to play. The valid range is `0` to `127`.

velocity: Specifies the volume to play the note at. The valid range is `0` to `127`.

channel: The channel number to send the event to. The valid range is `0` to `15`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/startNote(_:withVelocity:onChannel:)

func (AVAudioUnitMIDIInstrument) StopNoteOnChannel 

func (a AVAudioUnitMIDIInstrument) StopNoteOnChannel(note uint8, channel uint8)

Sends a MIDI Note Off event to the instrument.

note: The note number (key) to stop. The valid range is `0` to `127`.

channel: The channel number to send the event to. The valid range is `0` to `15`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/stopNote(_:onChannel:)

func (AVAudioUnitMIDIInstrument) Volume 

func (a AVAudioUnitMIDIInstrument) Volume() float32

The bus’s input volume.

Discussion

The default value is `1.0`, and the range of valid values is `0.0` to `1.0`. Only the AVAudioEnvironmentNode and the AVAudioMixerNode implement this property.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixing/volume

type AVAudioUnitMIDIInstrumentClass 

type AVAudioUnitMIDIInstrumentClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitMIDIInstrumentClass 

func GetAVAudioUnitMIDIInstrumentClass() AVAudioUnitMIDIInstrumentClass

GetAVAudioUnitMIDIInstrumentClass returns the class object for AVAudioUnitMIDIInstrument.

func (AVAudioUnitMIDIInstrumentClass) Alloc 

func (ac AVAudioUnitMIDIInstrumentClass) Alloc() AVAudioUnitMIDIInstrument

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitMIDIInstrumentClass) Class 

func (ac AVAudioUnitMIDIInstrumentClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitReverb 

type AVAudioUnitReverb struct {
	AVAudioUnitEffect
}

An object that implements a reverb effect.

Overview

A reverb simulates the acoustic characteristics of a particular environment. Use the different presets to simulate a particular space and blend it in with the original signal using the AVAudioUnitReverb.WetDryMix property.

Configure the reverb

Getting and setting the reverb values

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitReverb

func AVAudioUnitReverbFromID 

func AVAudioUnitReverbFromID(id objc.ID) AVAudioUnitReverb

AVAudioUnitReverbFromID constructs a AVAudioUnitReverb from an objc.ID.

An object that implements a reverb effect.

func NewAVAudioUnitReverb 

func NewAVAudioUnitReverb() AVAudioUnitReverb

NewAVAudioUnitReverb creates a new AVAudioUnitReverb instance.

func NewAudioUnitReverbWithAudioComponentDescription 

func NewAudioUnitReverbWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitReverb

Creates an audio unit effect object with the specified description.

audioComponentDescription: The description of the audio unit to create.

The `audioComponentDescription` must be one of these types `kAudioUnitType_Effect`, `kAudioUnitType_MusicEffect`, `kAudioUnitType_Panner`, `kAudioUnitType_RemoteEffect`, or `kAudioUnitType_RemoteMusicEffect`.

Return Value

A new AVAudioUnitEffect instance.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEffect/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitReverb) Autorelease 

func (a AVAudioUnitReverb) Autorelease() AVAudioUnitReverb

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitReverb) Init 

func (a AVAudioUnitReverb) Init() AVAudioUnitReverb

Init initializes the instance.

func (AVAudioUnitReverb) LoadFactoryPreset 

func (a AVAudioUnitReverb) LoadFactoryPreset(preset AVAudioUnitReverbPreset)

Configures the audio unit as a reverb preset.

preset: The reverb preset.

Discussion

For more information about possible values, see AVAudioUnitReverbPreset. The default value is AVAudioUnitReverbPresetMediumHall.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitReverb/loadFactoryPreset(_:)

func (AVAudioUnitReverb) SetWetDryMix 

func (a AVAudioUnitReverb) SetWetDryMix(value float32)

func (AVAudioUnitReverb) WetDryMix 

func (a AVAudioUnitReverb) WetDryMix() float32

The blend of the wet and dry signals.

Discussion

You specify the blend as a percentage. The range is `0%` through `100%`, where `0%` represents all dry.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitReverb/wetDryMix

type AVAudioUnitReverbClass 

type AVAudioUnitReverbClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitReverbClass 

func GetAVAudioUnitReverbClass() AVAudioUnitReverbClass

GetAVAudioUnitReverbClass returns the class object for AVAudioUnitReverb.

func (AVAudioUnitReverbClass) Alloc 

func (ac AVAudioUnitReverbClass) Alloc() AVAudioUnitReverb

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitReverbClass) Class 

func (ac AVAudioUnitReverbClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitReverbPreset 

type AVAudioUnitReverbPreset int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitReverbPreset 

const (
	// AVAudioUnitReverbPresetCathedral: A preset that represents a reverb with the acoustic characteristics of a cathedral environment.
	AVAudioUnitReverbPresetCathedral AVAudioUnitReverbPreset = 8
	// AVAudioUnitReverbPresetLargeChamber: A preset that represents a reverb with the acoustic characteristics of a large-sized chamber environment.
	AVAudioUnitReverbPresetLargeChamber AVAudioUnitReverbPreset = 7
	// AVAudioUnitReverbPresetLargeHall: A preset that represents a reverb with the acoustic characteristics of a large-sized hall environment.
	AVAudioUnitReverbPresetLargeHall AVAudioUnitReverbPreset = 4
	// AVAudioUnitReverbPresetLargeHall2: A preset that represents a reverb with the acoustic characteristics of an alternative large-sized hall environment.
	AVAudioUnitReverbPresetLargeHall2 AVAudioUnitReverbPreset = 12
	// AVAudioUnitReverbPresetLargeRoom: A preset that represents a reverb with the acoustic characteristics of a large-sized room environment.
	AVAudioUnitReverbPresetLargeRoom AVAudioUnitReverbPreset = 2
	// AVAudioUnitReverbPresetLargeRoom2: A preset that represents a reverb with the acoustic characteristics of an alternative large-sized room environment.
	AVAudioUnitReverbPresetLargeRoom2 AVAudioUnitReverbPreset = 9
	// AVAudioUnitReverbPresetMediumChamber: A preset that represents a reverb with the acoustic characteristics of a medium-sized chamber environment.
	AVAudioUnitReverbPresetMediumChamber AVAudioUnitReverbPreset = 6
	// AVAudioUnitReverbPresetMediumHall: A preset that represents a reverb with the acoustic characteristics of a medium-sized hall environment.
	AVAudioUnitReverbPresetMediumHall AVAudioUnitReverbPreset = 3
	// AVAudioUnitReverbPresetMediumHall2: A preset that represents a reverb with the acoustic characteristics of an alternative medium-sized hall environment.
	AVAudioUnitReverbPresetMediumHall2 AVAudioUnitReverbPreset = 10
	// AVAudioUnitReverbPresetMediumHall3: A preset that represents a reverb with the acoustic characteristics of an alternative medium-sized hall environment.
	AVAudioUnitReverbPresetMediumHall3 AVAudioUnitReverbPreset = 11
	// AVAudioUnitReverbPresetMediumRoom: A preset that represents a reverb with the acoustic characteristics of a medium-sized room environment.
	AVAudioUnitReverbPresetMediumRoom AVAudioUnitReverbPreset = 1
	// AVAudioUnitReverbPresetPlate: A preset that represents a reverb with the acoustic characteristics of a plate environment.
	AVAudioUnitReverbPresetPlate AVAudioUnitReverbPreset = 5
	// AVAudioUnitReverbPresetSmallRoom: A preset that represents a reverb with the acoustic characteristics of a small-sized room environment.
	AVAudioUnitReverbPresetSmallRoom AVAudioUnitReverbPreset = 0
)

func (AVAudioUnitReverbPreset) String 

func (e AVAudioUnitReverbPreset) String() string

type AVAudioUnitSampler 

type AVAudioUnitSampler struct {
	AVAudioUnitMIDIInstrument
}

An object that you configure with one or more instrument samples, based on Apple’s Sampler audio unit.

Overview

An AVAudioUnitSampler is an AVAudioUnit for Apple’s Sampler audio unit.

You configure the sampler by loading instruments from different types of files. These include an `aupreset` file, DLS, or SF2 sound bank; an EXS24 instrument; a single audio file; or an array of audio files.

The output of a AVAudioUnitSampler is a single stereo bus.

Configuring the Sampler Audio Unit

Getting and Setting Sampler Values

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitSampler

func AVAudioUnitSamplerFromID 

func AVAudioUnitSamplerFromID(id objc.ID) AVAudioUnitSampler

AVAudioUnitSamplerFromID constructs a AVAudioUnitSampler from an objc.ID.

An object that you configure with one or more instrument samples, based on Apple’s Sampler audio unit.

func NewAVAudioUnitSampler 

func NewAVAudioUnitSampler() AVAudioUnitSampler

NewAVAudioUnitSampler creates a new AVAudioUnitSampler instance.

func NewAudioUnitSamplerWithAudioComponentDescription 

func NewAudioUnitSamplerWithAudioComponentDescription(description objectivec.IObject) AVAudioUnitSampler

Creates a MIDI instrument audio unit with the component description you specify.

description: The description of the audio component.

Return Value

A new AVAudioUnitMIDIInstrument instance.

Discussion

The component type must be `kAudioUnitType_MusicDevice` or `kAudioUnitType_RemoteInstrument`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument/init(audioComponentDescription:) description is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitSampler) Autorelease 

func (a AVAudioUnitSampler) Autorelease() AVAudioUnitSampler

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitSampler) GlobalTuning 

func (a AVAudioUnitSampler) GlobalTuning() float32

An adjustment for the tuning of all the played notes.

Discussion

The tuning unit is cents, and defaults to `0.0`. The range of valid values is `-2400` to `2400` cents.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitSampler/globalTuning

func (AVAudioUnitSampler) Init 

func (a AVAudioUnitSampler) Init() AVAudioUnitSampler

Init initializes the instance.

func (AVAudioUnitSampler) LoadAudioFilesAtURLsError 

func (a AVAudioUnitSampler) LoadAudioFilesAtURLsError(audioFiles []foundation.NSURL) (bool, error)

Configures the sampler by loading the specified audio files.

audioFiles: An array of audio file URLs to load.

Discussion

The framework loads the audio files into a new instrument with each audio file in its own sampler zone. The framework uses any information in the audio file for its placement in the instrument. For example, the root key and key range.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitSampler/loadAudioFiles(at:)

func (AVAudioUnitSampler) LoadInstrumentAtURLError 

func (a AVAudioUnitSampler) LoadInstrumentAtURLError(instrumentURL foundation.INSURL) (bool, error)

Configures the sampler with the specified instrument file.

instrumentURL: The URL of the file that contains the instrument.

Discussion

The instrument can be one of the following types: Logic or GarageBand [EXS24], the sampler’s native `aupreset` file, or an audio file, such as `caf`, `aiff`, `wav`, or `mp3`.

For a single audio file, the framework loads it into a new default instrument and uses any information in the audio file, such as the root key and key range, for its placement in the instrument.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitSampler/loadInstrument(at:)

func (AVAudioUnitSampler) LoadSoundBankInstrumentAtURLProgramBankMSBBankLSBError 

func (a AVAudioUnitSampler) LoadSoundBankInstrumentAtURLProgramBankMSBBankLSBError(bankURL foundation.INSURL, program uint8, bankMSB uint8, bankLSB uint8) (bool, error)

Loads a specific instrument from the specified soundbank.

bankURL: The URL for a soundbank file, either a DLS bank (`XCUIElementTypeDls`) or a SoundFont bank (`XCUIElementTypeSf2`).

program: The program number for the instrument to load.

bankMSB: The most significant bit for the bank number for the instrument to load. This is usually `0x79` for melodic instruments and `0x78` for percussion instruments.

bankLSB: The least significant bit for the bank number for the instrument to load. This is often `0` and represents the bank variation.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitSampler/loadSoundBankInstrument(at:program:bankMSB:bankLSB:)

func (AVAudioUnitSampler) OverallGain 

func (a AVAudioUnitSampler) OverallGain() float32

An adjustment for the gain of all the played notes, in decibels.

Discussion

The default value is `0.0` dB, and the range of valid values is `-90.0` dB to `12.0` dB.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitSampler/overallGain

func (AVAudioUnitSampler) SetGlobalTuning 

func (a AVAudioUnitSampler) SetGlobalTuning(value float32)

func (AVAudioUnitSampler) SetOverallGain 

func (a AVAudioUnitSampler) SetOverallGain(value float32)

func (AVAudioUnitSampler) SetStereoPan 

func (a AVAudioUnitSampler) SetStereoPan(value float32)

func (AVAudioUnitSampler) StereoPan 

func (a AVAudioUnitSampler) StereoPan() float32

An adjustment for the stereo panning of all the played notes.

Discussion

The default value is `0.0`, and the range of valid values is `-100.0` to `100.0`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitSampler/stereoPan

type AVAudioUnitSamplerClass 

type AVAudioUnitSamplerClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitSamplerClass 

func GetAVAudioUnitSamplerClass() AVAudioUnitSamplerClass

GetAVAudioUnitSamplerClass returns the class object for AVAudioUnitSampler.

func (AVAudioUnitSamplerClass) Alloc 

func (ac AVAudioUnitSamplerClass) Alloc() AVAudioUnitSampler

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitSamplerClass) Class 

func (ac AVAudioUnitSamplerClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitTimeEffect 

type AVAudioUnitTimeEffect struct {
	AVAudioUnit
}

An object that processes audio in nonreal time.

Overview

A time effect audio unit represents an AVAudioUnit with a type `kAudioUnitType_FormatConverter` (`aufc)`. These effects don’t process audio in real time. The AVAudioUnitVarispeed class is an example of a time effect unit.

Creating a time effect

Getting and setting the time effect

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimeEffect

func AVAudioUnitTimeEffectFromID 

func AVAudioUnitTimeEffectFromID(id objc.ID) AVAudioUnitTimeEffect

AVAudioUnitTimeEffectFromID constructs a AVAudioUnitTimeEffect from an objc.ID.

An object that processes audio in nonreal time.

func NewAVAudioUnitTimeEffect 

func NewAVAudioUnitTimeEffect() AVAudioUnitTimeEffect

NewAVAudioUnitTimeEffect creates a new AVAudioUnitTimeEffect instance.

func NewAudioUnitTimeEffectWithAudioComponentDescription 

func NewAudioUnitTimeEffectWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitTimeEffect

Creates a time effect audio unit with the specified description.

audioComponentDescription: The description of the audio unit to create.

Return Value

A new AVAudioUnitTimeEffect instance.

Discussion

The `componentType` field of the description structure must be `kAudioUnitType_FormatConverter` (”`aufc`”); otherwise, the method raises an exception.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimeEffect/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitTimeEffect) Autorelease 

func (a AVAudioUnitTimeEffect) Autorelease() AVAudioUnitTimeEffect

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitTimeEffect) Bypass 

func (a AVAudioUnitTimeEffect) Bypass() bool

The bypass state of the audio unit.

Discussion

If true, the audio unit bypasses audio processing.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimeEffect/bypass

func (AVAudioUnitTimeEffect) Init 

func (a AVAudioUnitTimeEffect) Init() AVAudioUnitTimeEffect

Init initializes the instance.

func (AVAudioUnitTimeEffect) InitWithAudioComponentDescription 

func (a AVAudioUnitTimeEffect) InitWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitTimeEffect

Creates a time effect audio unit with the specified description.

audioComponentDescription: The description of the audio unit to create.

audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

Return Value

A new AVAudioUnitTimeEffect instance.

Discussion

The `componentType` field of the description structure must be `kAudioUnitType_FormatConverter` (”`aufc`”); otherwise, the method raises an exception.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimeEffect/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitTimeEffect) SetBypass 

func (a AVAudioUnitTimeEffect) SetBypass(value bool)

type AVAudioUnitTimeEffectClass 

type AVAudioUnitTimeEffectClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitTimeEffectClass 

func GetAVAudioUnitTimeEffectClass() AVAudioUnitTimeEffectClass

GetAVAudioUnitTimeEffectClass returns the class object for AVAudioUnitTimeEffect.

func (AVAudioUnitTimeEffectClass) Alloc 

func (ac AVAudioUnitTimeEffectClass) Alloc() AVAudioUnitTimeEffect

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitTimeEffectClass) Class 

func (ac AVAudioUnitTimeEffectClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitTimePitch 

type AVAudioUnitTimePitch struct {
	AVAudioUnitTimeEffect
}

An object that provides a good-quality playback rate and pitch shifting independently of each other.

Getting and setting time pitch values

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimePitch

func AVAudioUnitTimePitchFromID 

func AVAudioUnitTimePitchFromID(id objc.ID) AVAudioUnitTimePitch

AVAudioUnitTimePitchFromID constructs a AVAudioUnitTimePitch from an objc.ID.

An object that provides a good-quality playback rate and pitch shifting independently of each other.

func NewAVAudioUnitTimePitch 

func NewAVAudioUnitTimePitch() AVAudioUnitTimePitch

NewAVAudioUnitTimePitch creates a new AVAudioUnitTimePitch instance.

func NewAudioUnitTimePitchWithAudioComponentDescription 

func NewAudioUnitTimePitchWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitTimePitch

Creates a time effect audio unit with the specified description.

audioComponentDescription: The description of the audio unit to create.

Return Value

A new AVAudioUnitTimeEffect instance.

Discussion

The `componentType` field of the description structure must be `kAudioUnitType_FormatConverter` (”`aufc`”); otherwise, the method raises an exception.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimeEffect/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitTimePitch) Autorelease 

func (a AVAudioUnitTimePitch) Autorelease() AVAudioUnitTimePitch

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitTimePitch) Init 

func (a AVAudioUnitTimePitch) Init() AVAudioUnitTimePitch

Init initializes the instance.

func (AVAudioUnitTimePitch) Overlap 

func (a AVAudioUnitTimePitch) Overlap() float32

The amount of overlap between segments of the input audio signal.

Discussion

A higher value results in fewer artifacts in the output signal. The default value is `8.0`. The range of values is `3.0` to `32.0`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimePitch/overlap

func (AVAudioUnitTimePitch) Pitch 

func (a AVAudioUnitTimePitch) Pitch() float32

The amount to use to pitch shift the input signal.

Discussion

The audio unit measures the pitch in , a logarithmic value you use for measuring musical intervals. One octave is equal to 1200 cents. One musical semitone is equal to 100 cents.

The default value is `0“.0`. The range of values is `-2400` to `2400`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimePitch/pitch

func (AVAudioUnitTimePitch) Rate 

func (a AVAudioUnitTimePitch) Rate() float32

The playback rate of the input signal.

Discussion

The default value is 1.0. The range of supported values is `1/32` to `32.0`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimePitch/rate

func (AVAudioUnitTimePitch) SetOverlap 

func (a AVAudioUnitTimePitch) SetOverlap(value float32)

func (AVAudioUnitTimePitch) SetPitch 

func (a AVAudioUnitTimePitch) SetPitch(value float32)

func (AVAudioUnitTimePitch) SetRate 

func (a AVAudioUnitTimePitch) SetRate(value float32)

type AVAudioUnitTimePitchClass 

type AVAudioUnitTimePitchClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitTimePitchClass 

func GetAVAudioUnitTimePitchClass() AVAudioUnitTimePitchClass

GetAVAudioUnitTimePitchClass returns the class object for AVAudioUnitTimePitch.

func (AVAudioUnitTimePitchClass) Alloc 

func (ac AVAudioUnitTimePitchClass) Alloc() AVAudioUnitTimePitch

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitTimePitchClass) Class 

func (ac AVAudioUnitTimePitchClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioUnitVarispeed 

type AVAudioUnitVarispeed struct {
	AVAudioUnitTimeEffect
}

An object that allows control of the playback rate.

Getting and setting the playback rate

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitVarispeed

func AVAudioUnitVarispeedFromID 

func AVAudioUnitVarispeedFromID(id objc.ID) AVAudioUnitVarispeed

AVAudioUnitVarispeedFromID constructs a AVAudioUnitVarispeed from an objc.ID.

An object that allows control of the playback rate.

func NewAVAudioUnitVarispeed 

func NewAVAudioUnitVarispeed() AVAudioUnitVarispeed

NewAVAudioUnitVarispeed creates a new AVAudioUnitVarispeed instance.

func NewAudioUnitVarispeedWithAudioComponentDescription 

func NewAudioUnitVarispeedWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitVarispeed

Creates a time effect audio unit with the specified description.

audioComponentDescription: The description of the audio unit to create.

Return Value

A new AVAudioUnitTimeEffect instance.

Discussion

The `componentType` field of the description structure must be `kAudioUnitType_FormatConverter` (”`aufc`”); otherwise, the method raises an exception.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimeEffect/init(audioComponentDescription:) audioComponentDescription is a [audiotoolbox.AudioComponentDescription].

func (AVAudioUnitVarispeed) Autorelease 

func (a AVAudioUnitVarispeed) Autorelease() AVAudioUnitVarispeed

Autorelease adds the receiver to the current autorelease pool.

func (AVAudioUnitVarispeed) Init 

func (a AVAudioUnitVarispeed) Init() AVAudioUnitVarispeed

Init initializes the instance.

func (AVAudioUnitVarispeed) Rate 

func (a AVAudioUnitVarispeed) Rate() float32

The audio playback rate.

Discussion

The varispeed audio unit resamples the input signal, and as a result, changing the playback rate also changes the pitch. For example, changing the rate to `2.0` results in the output audio playing one octave higher. Similarly changing the rate to `0.5`, results in the output audio playing one octave lower.

The audio unit measures the pitch in , a logarithmic value you use for measuring musical intervals. One octave is equal to 1200 cents. One musical semitone is equal to 100 cents.

Using the `rate` value you calculate the pitch (in cents) using the formula `pitch = 1200.0 * log2(rate)`. Conversely, you calculate the appropriate `rate` for a desired pitch with the formula `rate = pow(2, cents/1200.0)`.

The default value is `1.0`. The range of values is `0.25` to `4.0`.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitVarispeed/rate

func (AVAudioUnitVarispeed) SetRate 

func (a AVAudioUnitVarispeed) SetRate(value float32)

type AVAudioUnitVarispeedClass 

type AVAudioUnitVarispeedClass struct {
	// contains filtered or unexported fields
}

func GetAVAudioUnitVarispeedClass 

func GetAVAudioUnitVarispeedClass() AVAudioUnitVarispeedClass

GetAVAudioUnitVarispeedClass returns the class object for AVAudioUnitVarispeed.

func (AVAudioUnitVarispeedClass) Alloc 

func (ac AVAudioUnitVarispeedClass) Alloc() AVAudioUnitVarispeed

Alloc allocates memory for a new instance of the class.

func (AVAudioUnitVarispeedClass) Class 

func (ac AVAudioUnitVarispeedClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVAudioVoiceProcessingOtherAudioDuckingConfiguration 

type AVAudioVoiceProcessingOtherAudioDuckingConfiguration struct {
	EnableAdvancedDucking bool                                         // Enables advanced ducking which ducks other audio based on the presence of voice activity from local and remote chat participants.
	DuckingLevel          AVAudioVoiceProcessingOtherAudioDuckingLevel // The ducking level of other audio.

}

AVAudioVoiceProcessingOtherAudioDuckingConfiguration - The configuration of ducking non-voice audio.

[Full Topic] [Full Topic]: https://developer.apple.com/documentation/AVFAudio/AVAudioVoiceProcessingOtherAudioDuckingConfiguration

type AVAudioVoiceProcessingOtherAudioDuckingLevel 

type AVAudioVoiceProcessingOtherAudioDuckingLevel int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioVoiceProcessingOtherAudioDuckingConfiguration/Level 

const (
	// AVAudioVoiceProcessingOtherAudioDuckingLevelDefault: The default ducking level for typical voice chat.
	AVAudioVoiceProcessingOtherAudioDuckingLevelDefault AVAudioVoiceProcessingOtherAudioDuckingLevel = 0
	// AVAudioVoiceProcessingOtherAudioDuckingLevelMax: Applies maximum ducking to other audio.
	AVAudioVoiceProcessingOtherAudioDuckingLevelMax AVAudioVoiceProcessingOtherAudioDuckingLevel = 30
	// AVAudioVoiceProcessingOtherAudioDuckingLevelMid: Applies medium ducking to other audio.
	AVAudioVoiceProcessingOtherAudioDuckingLevelMid AVAudioVoiceProcessingOtherAudioDuckingLevel = 20
	// AVAudioVoiceProcessingOtherAudioDuckingLevelMin: Applies minimum ducking to other audio.
	AVAudioVoiceProcessingOtherAudioDuckingLevelMin AVAudioVoiceProcessingOtherAudioDuckingLevel = 10
)

func (AVAudioVoiceProcessingOtherAudioDuckingLevel) String 

func (e AVAudioVoiceProcessingOtherAudioDuckingLevel) String() string

type AVAudioVoiceProcessingSpeechActivityEvent 

type AVAudioVoiceProcessingSpeechActivityEvent int

See: https://developer.apple.com/documentation/AVFAudio/AVAudioVoiceProcessingSpeechActivityEvent 

const (
	// AVAudioVoiceProcessingSpeechActivityEnded: Indicates the end of speech activity.
	AVAudioVoiceProcessingSpeechActivityEnded AVAudioVoiceProcessingSpeechActivityEvent = 1
	// AVAudioVoiceProcessingSpeechActivityStarted: Indicates the start of speech activity.
	AVAudioVoiceProcessingSpeechActivityStarted AVAudioVoiceProcessingSpeechActivityEvent = 0
)

func (AVAudioVoiceProcessingSpeechActivityEvent) String 

func (e AVAudioVoiceProcessingSpeechActivityEvent) String() string

type AVAudioVoiceProcessingSpeechActivityEventHandler 

type AVAudioVoiceProcessingSpeechActivityEventHandler = func(AVAudioVoiceProcessingSpeechActivityEvent)

AVAudioVoiceProcessingSpeechActivityEventHandler handles completion with a primitive value.

Used by:

type AVBeatRange 

type AVBeatRange struct {
	Start  float64
	Length float64
}

AVBeatRange - A specific time range within a music track.

[Full Topic] [Full Topic]: https://developer.apple.com/documentation/AVFAudio/AVBeatRange-c.struct

type AVExtendedNoteOnEvent 

type AVExtendedNoteOnEvent struct {
	AVMusicEvent
}

An object that represents a custom extension of a MIDI note on event.

Overview

Use this to allow an app to trigger a custom note on event on one of several Apple audio units that support it. The floating point note and velocity numbers allow for optional fractional control of the note’s runtime properties that the system modulates by those inputs. This event supports the possibility of an audio unit with more than the standard 16 MIDI channels.

Creating a Note On Event

Configuring a Note On Event

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent

func AVExtendedNoteOnEventFromID 

func AVExtendedNoteOnEventFromID(id objc.ID) AVExtendedNoteOnEvent

AVExtendedNoteOnEventFromID constructs a AVExtendedNoteOnEvent from an objc.ID.

An object that represents a custom extension of a MIDI note on event.

func NewAVExtendedNoteOnEvent 

func NewAVExtendedNoteOnEvent() AVExtendedNoteOnEvent

NewAVExtendedNoteOnEvent creates a new AVExtendedNoteOnEvent instance.

func NewExtendedNoteOnEventWithMIDINoteVelocityGroupIDDuration 

func NewExtendedNoteOnEventWithMIDINoteVelocityGroupIDDuration(midiNote float32, velocity float32, groupID uint32, duration AVMusicTimeStamp) AVExtendedNoteOnEvent

Creates an event with a MIDI note, velocity, group identifier, and duration.

midiNote: The MIDI note number.

velocity: The MIDI velocity.

groupID: The identifier that represents the audio unit channel that handles the event.

duration: The duration of the event, in beats.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent/init(midiNote:velocity:groupID:duration:)

func NewExtendedNoteOnEventWithMIDINoteVelocityInstrumentIDGroupIDDuration 

func NewExtendedNoteOnEventWithMIDINoteVelocityInstrumentIDGroupIDDuration(midiNote float32, velocity float32, instrumentID uint32, groupID uint32, duration AVMusicTimeStamp) AVExtendedNoteOnEvent

Creates a note on event with the default instrument.

midiNote: The MIDI note number.

velocity: The MIDI velocity.

instrumentID: The default instrument.

groupID: The identifier that represents the audio unit channel that handles the event.

duration: The duration of the event, in beats.

Discussion

Use defaultInstrument when you set `instrumentID`.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent/init(midiNote:velocity:instrumentID:groupID:duration:)

func (AVExtendedNoteOnEvent) Autorelease 

func (e AVExtendedNoteOnEvent) Autorelease() AVExtendedNoteOnEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVExtendedNoteOnEvent) Duration 

func (e AVExtendedNoteOnEvent) Duration() AVMusicTimeStamp

The duration of the event, in beats.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent/duration

func (AVExtendedNoteOnEvent) GroupID 

func (e AVExtendedNoteOnEvent) GroupID() uint32

The audio unit channel that handles the event.

Discussion

The valid range of values are between `0` and `15`, but can be higher if the AVMusicTrack destination audio unit supports more channels.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent/groupID

func (AVExtendedNoteOnEvent) Init 

func (e AVExtendedNoteOnEvent) Init() AVExtendedNoteOnEvent

Init initializes the instance.

func (AVExtendedNoteOnEvent) InitWithMIDINoteVelocityGroupIDDuration 

func (e AVExtendedNoteOnEvent) InitWithMIDINoteVelocityGroupIDDuration(midiNote float32, velocity float32, groupID uint32, duration AVMusicTimeStamp) AVExtendedNoteOnEvent

Creates an event with a MIDI note, velocity, group identifier, and duration.

midiNote: The MIDI note number.

velocity: The MIDI velocity.

groupID: The identifier that represents the audio unit channel that handles the event.

duration: The duration of the event, in beats.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent/init(midiNote:velocity:groupID:duration:)

func (AVExtendedNoteOnEvent) InitWithMIDINoteVelocityInstrumentIDGroupIDDuration 

func (e AVExtendedNoteOnEvent) InitWithMIDINoteVelocityInstrumentIDGroupIDDuration(midiNote float32, velocity float32, instrumentID uint32, groupID uint32, duration AVMusicTimeStamp) AVExtendedNoteOnEvent

Creates a note on event with the default instrument.

midiNote: The MIDI note number.

velocity: The MIDI velocity.

instrumentID: The default instrument.

groupID: The identifier that represents the audio unit channel that handles the event.

duration: The duration of the event, in beats.

Discussion

Use defaultInstrument when you set `instrumentID`.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent/init(midiNote:velocity:instrumentID:groupID:duration:)

func (AVExtendedNoteOnEvent) InstrumentID 

func (e AVExtendedNoteOnEvent) InstrumentID() uint32

The instrument identifier.

Discussion

Set this value to defaultInstrument.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent/instrumentID

func (AVExtendedNoteOnEvent) MidiNote 

func (e AVExtendedNoteOnEvent) MidiNote() float32

The MIDI note number.

Discussion

If the instrument within the AVMusicTrack destination audio unit supports fractional values, you use this to generate arbitrary tunings. The valid range of values depends on the destination audio unit, and is usually between `0.0` and `127.0`.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent/midiNote

func (AVExtendedNoteOnEvent) SetDuration 

func (e AVExtendedNoteOnEvent) SetDuration(value AVMusicTimeStamp)

func (AVExtendedNoteOnEvent) SetGroupID 

func (e AVExtendedNoteOnEvent) SetGroupID(value uint32)

func (AVExtendedNoteOnEvent) SetInstrumentID 

func (e AVExtendedNoteOnEvent) SetInstrumentID(value uint32)

func (AVExtendedNoteOnEvent) SetMidiNote 

func (e AVExtendedNoteOnEvent) SetMidiNote(value float32)

func (AVExtendedNoteOnEvent) SetVelocity 

func (e AVExtendedNoteOnEvent) SetVelocity(value float32)

func (AVExtendedNoteOnEvent) Velocity 

func (e AVExtendedNoteOnEvent) Velocity() float32

The MDI velocity.

Discussion

If the instrument in the AVMusicTrack destination audio unit supports fractional values, use this to generate precise changes in gain and other values. The valid range of values depend on the destination audio unit, and is usually between `0.0` and `127.0`.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent/velocity

type AVExtendedNoteOnEventClass 

type AVExtendedNoteOnEventClass struct {
	// contains filtered or unexported fields
}

func GetAVExtendedNoteOnEventClass 

func GetAVExtendedNoteOnEventClass() AVExtendedNoteOnEventClass

GetAVExtendedNoteOnEventClass returns the class object for AVExtendedNoteOnEvent.

func (AVExtendedNoteOnEventClass) Alloc 

func (ac AVExtendedNoteOnEventClass) Alloc() AVExtendedNoteOnEvent

Alloc allocates memory for a new instance of the class.

func (AVExtendedNoteOnEventClass) Class 

func (ac AVExtendedNoteOnEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVExtendedTempoEvent 

type AVExtendedTempoEvent struct {
	AVMusicEvent
}

An object that represents a tempo change to a specific beats-per-minute value.

Creating a Tempo Event

Configuring a Tempo Event

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedTempoEvent

func AVExtendedTempoEventFromID 

func AVExtendedTempoEventFromID(id objc.ID) AVExtendedTempoEvent

AVExtendedTempoEventFromID constructs a AVExtendedTempoEvent from an objc.ID.

An object that represents a tempo change to a specific beats-per-minute value.

func NewAVExtendedTempoEvent 

func NewAVExtendedTempoEvent() AVExtendedTempoEvent

NewAVExtendedTempoEvent creates a new AVExtendedTempoEvent instance.

func NewExtendedTempoEventWithTempo 

func NewExtendedTempoEventWithTempo(tempo float64) AVExtendedTempoEvent

Creates an extended tempo event.

tempo: The tempo in beats per minute as a positive value.

Discussion

The new tempo begins at the timestamp for this event.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedTempoEvent/init(tempo:)

func (AVExtendedTempoEvent) Autorelease 

func (e AVExtendedTempoEvent) Autorelease() AVExtendedTempoEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVExtendedTempoEvent) Init 

func (e AVExtendedTempoEvent) Init() AVExtendedTempoEvent

Init initializes the instance.

func (AVExtendedTempoEvent) InitWithTempo 

func (e AVExtendedTempoEvent) InitWithTempo(tempo float64) AVExtendedTempoEvent

Creates an extended tempo event.

tempo: The tempo in beats per minute as a positive value.

Discussion

The new tempo begins at the timestamp for this event.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedTempoEvent/init(tempo:)

func (AVExtendedTempoEvent) SetTempo 

func (e AVExtendedTempoEvent) SetTempo(value float64)

func (AVExtendedTempoEvent) Tempo 

func (e AVExtendedTempoEvent) Tempo() float64

The tempo in beats per minute as a positive value.

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedTempoEvent/tempo

type AVExtendedTempoEventClass 

type AVExtendedTempoEventClass struct {
	// contains filtered or unexported fields
}

func GetAVExtendedTempoEventClass 

func GetAVExtendedTempoEventClass() AVExtendedTempoEventClass

GetAVExtendedTempoEventClass returns the class object for AVExtendedTempoEvent.

func (AVExtendedTempoEventClass) Alloc 

func (ac AVExtendedTempoEventClass) Alloc() AVExtendedTempoEvent

Alloc allocates memory for a new instance of the class.

func (AVExtendedTempoEventClass) Class 

func (ac AVExtendedTempoEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMIDIChannelEvent 

type AVMIDIChannelEvent struct {
	AVMusicEvent
}

A base class for all MIDI messages that operate on a single MIDI channel.

Configuring a Channel Event

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIChannelEvent

func AVMIDIChannelEventFromID 

func AVMIDIChannelEventFromID(id objc.ID) AVMIDIChannelEvent

AVMIDIChannelEventFromID constructs a AVMIDIChannelEvent from an objc.ID.

A base class for all MIDI messages that operate on a single MIDI channel.

func NewAVMIDIChannelEvent 

func NewAVMIDIChannelEvent() AVMIDIChannelEvent

NewAVMIDIChannelEvent creates a new AVMIDIChannelEvent instance.

func (AVMIDIChannelEvent) Autorelease 

func (m AVMIDIChannelEvent) Autorelease() AVMIDIChannelEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMIDIChannelEvent) Channel 

func (m AVMIDIChannelEvent) Channel() uint32

The MIDI channel.

Discussion

The valid range of values are between `0` and `15`.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIChannelEvent/channel

func (AVMIDIChannelEvent) Init 

func (m AVMIDIChannelEvent) Init() AVMIDIChannelEvent

Init initializes the instance.

func (AVMIDIChannelEvent) SetChannel 

func (m AVMIDIChannelEvent) SetChannel(value uint32)

type AVMIDIChannelEventClass 

type AVMIDIChannelEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMIDIChannelEventClass 

func GetAVMIDIChannelEventClass() AVMIDIChannelEventClass

GetAVMIDIChannelEventClass returns the class object for AVMIDIChannelEvent.

func (AVMIDIChannelEventClass) Alloc 

func (ac AVMIDIChannelEventClass) Alloc() AVMIDIChannelEvent

Alloc allocates memory for a new instance of the class.

func (AVMIDIChannelEventClass) Class 

func (ac AVMIDIChannelEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMIDIChannelPressureEvent 

type AVMIDIChannelPressureEvent struct {
	AVMIDIChannelEvent
}

An object that represents a MIDI channel pressure message.

Overview

The effect of this message depends on the AVMusicTrack destination audio unit, and the capabilities of the destination’s loaded instrument.

Creating a Pressure Event

Configuring a Pressure Event

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIChannelPressureEvent

func AVMIDIChannelPressureEventFromID 

func AVMIDIChannelPressureEventFromID(id objc.ID) AVMIDIChannelPressureEvent

AVMIDIChannelPressureEventFromID constructs a AVMIDIChannelPressureEvent from an objc.ID.

An object that represents a MIDI channel pressure message.

func NewAVMIDIChannelPressureEvent 

func NewAVMIDIChannelPressureEvent() AVMIDIChannelPressureEvent

NewAVMIDIChannelPressureEvent creates a new AVMIDIChannelPressureEvent instance.

func NewMIDIChannelPressureEventWithChannelPressure 

func NewMIDIChannelPressureEventWithChannelPressure(channel uint32, pressure uint32) AVMIDIChannelPressureEvent

Creates a pressure event with a channel and pressure value.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIChannelPressureEvent/init(channel:pressure:)

func (AVMIDIChannelPressureEvent) Autorelease 

func (m AVMIDIChannelPressureEvent) Autorelease() AVMIDIChannelPressureEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMIDIChannelPressureEvent) Init 

func (m AVMIDIChannelPressureEvent) Init() AVMIDIChannelPressureEvent

Init initializes the instance.

func (AVMIDIChannelPressureEvent) InitWithChannelPressure 

func (m AVMIDIChannelPressureEvent) InitWithChannelPressure(channel uint32, pressure uint32) AVMIDIChannelPressureEvent

Creates a pressure event with a channel and pressure value.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIChannelPressureEvent/init(channel:pressure:)

func (AVMIDIChannelPressureEvent) Pressure 

func (m AVMIDIChannelPressureEvent) Pressure() uint32

The MIDI channel pressure.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIChannelPressureEvent/pressure

func (AVMIDIChannelPressureEvent) SetPressure 

func (m AVMIDIChannelPressureEvent) SetPressure(value uint32)

type AVMIDIChannelPressureEventClass 

type AVMIDIChannelPressureEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMIDIChannelPressureEventClass 

func GetAVMIDIChannelPressureEventClass() AVMIDIChannelPressureEventClass

GetAVMIDIChannelPressureEventClass returns the class object for AVMIDIChannelPressureEvent.

func (AVMIDIChannelPressureEventClass) Alloc 

func (ac AVMIDIChannelPressureEventClass) Alloc() AVMIDIChannelPressureEvent

Alloc allocates memory for a new instance of the class.

func (AVMIDIChannelPressureEventClass) Class 

func (ac AVMIDIChannelPressureEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMIDIControlChangeEvent 

type AVMIDIControlChangeEvent struct {
	AVMIDIChannelEvent
}

An object that represents a MIDI control change message.

Creating a Control Change Event

Inspecting a Control Change Event

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIControlChangeEvent

func AVMIDIControlChangeEventFromID 

func AVMIDIControlChangeEventFromID(id objc.ID) AVMIDIControlChangeEvent

AVMIDIControlChangeEventFromID constructs a AVMIDIControlChangeEvent from an objc.ID.

An object that represents a MIDI control change message.

func NewAVMIDIControlChangeEvent 

func NewAVMIDIControlChangeEvent() AVMIDIControlChangeEvent

NewAVMIDIControlChangeEvent creates a new AVMIDIControlChangeEvent instance.

func NewMIDIControlChangeEventWithChannelMessageTypeValue 

func NewMIDIControlChangeEventWithChannelMessageTypeValue(channel uint32, messageType AVMIDIControlChangeMessageType, value uint32) AVMIDIControlChangeEvent

Creates an event with a channel, control change type, and a value.

channel: The MIDI channel for the control change, between `0` and `15`.

messageType: The type that indicates which MIDI control change message to send.

value: The value for the control change.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIControlChangeEvent/init(channel:messageType:value:)

func (AVMIDIControlChangeEvent) Autorelease 

func (m AVMIDIControlChangeEvent) Autorelease() AVMIDIControlChangeEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMIDIControlChangeEvent) Init 

func (m AVMIDIControlChangeEvent) Init() AVMIDIControlChangeEvent

Init initializes the instance.

func (AVMIDIControlChangeEvent) InitWithChannelMessageTypeValue 

func (m AVMIDIControlChangeEvent) InitWithChannelMessageTypeValue(channel uint32, messageType AVMIDIControlChangeMessageType, value uint32) AVMIDIControlChangeEvent

Creates an event with a channel, control change type, and a value.

channel: The MIDI channel for the control change, between `0` and `15`.

messageType: The type that indicates which MIDI control change message to send.

value: The value for the control change.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIControlChangeEvent/init(channel:messageType:value:)

func (AVMIDIControlChangeEvent) MessageType 

func (m AVMIDIControlChangeEvent) MessageType() AVMIDIControlChangeMessageType

The type of control change message.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIControlChangeEvent/messageType-swift.property

func (AVMIDIControlChangeEvent) Value 

func (m AVMIDIControlChangeEvent) Value() uint32

The value of the control change event.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIControlChangeEvent/value

type AVMIDIControlChangeEventClass 

type AVMIDIControlChangeEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMIDIControlChangeEventClass 

func GetAVMIDIControlChangeEventClass() AVMIDIControlChangeEventClass

GetAVMIDIControlChangeEventClass returns the class object for AVMIDIControlChangeEvent.

func (AVMIDIControlChangeEventClass) Alloc 

func (ac AVMIDIControlChangeEventClass) Alloc() AVMIDIControlChangeEvent

Alloc allocates memory for a new instance of the class.

func (AVMIDIControlChangeEventClass) Class 

func (ac AVMIDIControlChangeEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMIDIControlChangeMessageType 

type AVMIDIControlChangeMessageType int

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIControlChangeEvent/MessageType-swift.enum 

const (
	// AVMIDIControlChangeMessageTypeAllNotesOff: An event type for muting all sounding notes while maintaining the release time.
	AVMIDIControlChangeMessageTypeAllNotesOff AVMIDIControlChangeMessageType = 123
	// AVMIDIControlChangeMessageTypeAllSoundOff: An event type for muting all sounding notes.
	AVMIDIControlChangeMessageTypeAllSoundOff AVMIDIControlChangeMessageType = 120
	// AVMIDIControlChangeMessageTypeAttackTime: An event type for controlling the attack time.
	AVMIDIControlChangeMessageTypeAttackTime AVMIDIControlChangeMessageType = 73
	// AVMIDIControlChangeMessageTypeBalance: An event type for controlling the left and right channel balance.
	AVMIDIControlChangeMessageTypeBalance AVMIDIControlChangeMessageType = 8
	// AVMIDIControlChangeMessageTypeBankSelect: An event type for switching bank selection.
	AVMIDIControlChangeMessageTypeBankSelect AVMIDIControlChangeMessageType = 0
	// AVMIDIControlChangeMessageTypeBreath: An event type for a breath controller.
	AVMIDIControlChangeMessageTypeBreath AVMIDIControlChangeMessageType = 2
	// AVMIDIControlChangeMessageTypeBrightness: An event type for controlling the brightness.
	AVMIDIControlChangeMessageTypeBrightness AVMIDIControlChangeMessageType = 74
	// AVMIDIControlChangeMessageTypeChorusLevel: An event type for controlling the chorus level.
	AVMIDIControlChangeMessageTypeChorusLevel AVMIDIControlChangeMessageType = 93
	// AVMIDIControlChangeMessageTypeDataEntry: An event type for controlling the data entry parameters.
	AVMIDIControlChangeMessageTypeDataEntry AVMIDIControlChangeMessageType = 6
	// AVMIDIControlChangeMessageTypeDecayTime: An event type for controlling the decay time.
	AVMIDIControlChangeMessageTypeDecayTime AVMIDIControlChangeMessageType = 75
	// AVMIDIControlChangeMessageTypeExpression: An event type that represents an expression controller.
	AVMIDIControlChangeMessageTypeExpression AVMIDIControlChangeMessageType = 11
	// AVMIDIControlChangeMessageTypeFilterResonance: An event type for a filter resonance.
	AVMIDIControlChangeMessageTypeFilterResonance AVMIDIControlChangeMessageType = 71
	// AVMIDIControlChangeMessageTypeFoot: An event type for sending continuous stream of values when using a foot controller.
	AVMIDIControlChangeMessageTypeFoot AVMIDIControlChangeMessageType = 4
	// AVMIDIControlChangeMessageTypeHold2Pedal: An event type for holding notes.
	AVMIDIControlChangeMessageTypeHold2Pedal AVMIDIControlChangeMessageType = 69
	// AVMIDIControlChangeMessageTypeLegatoPedal: An event type for switching the legato pedal on or off.
	AVMIDIControlChangeMessageTypeLegatoPedal AVMIDIControlChangeMessageType = 68
	// AVMIDIControlChangeMessageTypeModWheel: An event type for modulating a vibrato effect.
	AVMIDIControlChangeMessageTypeModWheel AVMIDIControlChangeMessageType = 1
	// AVMIDIControlChangeMessageTypeMonoModeOff: An event type for setting the device mode to polyphonic.
	AVMIDIControlChangeMessageTypeMonoModeOff AVMIDIControlChangeMessageType = 127
	// AVMIDIControlChangeMessageTypeMonoModeOn: An event type for setting the device mode to monophonic.
	AVMIDIControlChangeMessageTypeMonoModeOn AVMIDIControlChangeMessageType = 126
	// AVMIDIControlChangeMessageTypeOmniModeOff: An event type for setting omni off mode.
	AVMIDIControlChangeMessageTypeOmniModeOff AVMIDIControlChangeMessageType = 124
	// AVMIDIControlChangeMessageTypeOmniModeOn: An event type for setting omni on mode.
	AVMIDIControlChangeMessageTypeOmniModeOn AVMIDIControlChangeMessageType = 125
	// AVMIDIControlChangeMessageTypePan: An event type for controlling the left and right channel pan.
	AVMIDIControlChangeMessageTypePan AVMIDIControlChangeMessageType = 10
	// AVMIDIControlChangeMessageTypePortamento: An event type for switching portamento on or off.
	AVMIDIControlChangeMessageTypePortamento AVMIDIControlChangeMessageType = 65
	// AVMIDIControlChangeMessageTypePortamentoTime: An event type for controlling the portamento rate.
	AVMIDIControlChangeMessageTypePortamentoTime AVMIDIControlChangeMessageType = 5
	// AVMIDIControlChangeMessageTypeRPN_LSB: An event type that represents the registered parameter number LSB.
	AVMIDIControlChangeMessageTypeRPN_LSB AVMIDIControlChangeMessageType = 100
	// AVMIDIControlChangeMessageTypeRPN_MSB: An event type that represents the registered parameter number MSB.
	AVMIDIControlChangeMessageTypeRPN_MSB AVMIDIControlChangeMessageType = 101
	// AVMIDIControlChangeMessageTypeReleaseTime: An event type for controlling the release time.
	AVMIDIControlChangeMessageTypeReleaseTime AVMIDIControlChangeMessageType = 72
	// AVMIDIControlChangeMessageTypeResetAllControllers: An event type for resetting all controllers to their default state.
	AVMIDIControlChangeMessageTypeResetAllControllers AVMIDIControlChangeMessageType = 121
	// AVMIDIControlChangeMessageTypeReverbLevel: An event type for controlling the reverb level.
	AVMIDIControlChangeMessageTypeReverbLevel AVMIDIControlChangeMessageType = 91
	// AVMIDIControlChangeMessageTypeSoft: An event type for lowering the volume of the notes.
	AVMIDIControlChangeMessageTypeSoft AVMIDIControlChangeMessageType = 67
	// AVMIDIControlChangeMessageTypeSostenuto: An event type for switching sostenuto on or off.
	AVMIDIControlChangeMessageTypeSostenuto AVMIDIControlChangeMessageType = 66
	// AVMIDIControlChangeMessageTypeSustain: An event type for switching a damper pedal on or off.
	AVMIDIControlChangeMessageTypeSustain AVMIDIControlChangeMessageType = 64
	// AVMIDIControlChangeMessageTypeVibratoDelay: An event type for controlling the vibrato delay.
	AVMIDIControlChangeMessageTypeVibratoDelay AVMIDIControlChangeMessageType = 78
	// AVMIDIControlChangeMessageTypeVibratoDepth: An event type for controlling the vibrato depth.
	AVMIDIControlChangeMessageTypeVibratoDepth AVMIDIControlChangeMessageType = 77
	// AVMIDIControlChangeMessageTypeVibratoRate: An event type for controlling the vibrato rate.
	AVMIDIControlChangeMessageTypeVibratoRate AVMIDIControlChangeMessageType = 76
	// AVMIDIControlChangeMessageTypeVolume: An event type for controlling the channel volume.
	AVMIDIControlChangeMessageTypeVolume AVMIDIControlChangeMessageType = 7
)

func (AVMIDIControlChangeMessageType) String 

func (e AVMIDIControlChangeMessageType) String() string

type AVMIDIMetaEvent 

type AVMIDIMetaEvent struct {
	AVMusicEvent
}

An object that represents MIDI meta event messages.

Overview

You can’t modify the size and contents of this event once you create it. This doesn’t verify that the content matches the MIDI specification.

You can only add AVMIDIMetaEventTypeTempo, AVMIDIMetaEventTypeSmpteOffset, or AVMIDIMetaEventTypeTimeSignature to a sequence’s tempo track.

Creating a Meta Event

Getting the Meta Event Type

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIMetaEvent

func AVMIDIMetaEventFromID 

func AVMIDIMetaEventFromID(id objc.ID) AVMIDIMetaEvent

AVMIDIMetaEventFromID constructs a AVMIDIMetaEvent from an objc.ID.

An object that represents MIDI meta event messages.

func NewAVMIDIMetaEvent 

func NewAVMIDIMetaEvent() AVMIDIMetaEvent

NewAVMIDIMetaEvent creates a new AVMIDIMetaEvent instance.

func NewMIDIMetaEventWithTypeData 

func NewMIDIMetaEventWithTypeData(type_ AVMIDIMetaEventType, data foundation.INSData) AVMIDIMetaEvent

Creates an event with a MIDI meta event type and data.

type: The meta event type.

data: The data that contains the contents of the meta event.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIMetaEvent/init(type:data:)

func (AVMIDIMetaEvent) Autorelease 

func (m AVMIDIMetaEvent) Autorelease() AVMIDIMetaEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMIDIMetaEvent) Init 

func (m AVMIDIMetaEvent) Init() AVMIDIMetaEvent

Init initializes the instance.

func (AVMIDIMetaEvent) InitWithTypeData 

func (m AVMIDIMetaEvent) InitWithTypeData(type_ AVMIDIMetaEventType, data foundation.INSData) AVMIDIMetaEvent

Creates an event with a MIDI meta event type and data.

type: The meta event type.

data: The data that contains the contents of the meta event.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIMetaEvent/init(type:data:)

func (AVMIDIMetaEvent) Type 

func (m AVMIDIMetaEvent) Type() AVMIDIMetaEventType

The type of meta event.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIMetaEvent/type

type AVMIDIMetaEventClass 

type AVMIDIMetaEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMIDIMetaEventClass 

func GetAVMIDIMetaEventClass() AVMIDIMetaEventClass

GetAVMIDIMetaEventClass returns the class object for AVMIDIMetaEvent.

func (AVMIDIMetaEventClass) Alloc 

func (ac AVMIDIMetaEventClass) Alloc() AVMIDIMetaEvent

Alloc allocates memory for a new instance of the class.

func (AVMIDIMetaEventClass) Class 

func (ac AVMIDIMetaEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMIDIMetaEventType 

type AVMIDIMetaEventType int

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIMetaEvent/EventType 

const (
	// AVMIDIMetaEventTypeCopyright: An event type that represents a copyright.
	AVMIDIMetaEventTypeCopyright AVMIDIMetaEventType = 2
	// AVMIDIMetaEventTypeCuePoint: An event type that represents a cue point.
	AVMIDIMetaEventTypeCuePoint AVMIDIMetaEventType = 7
	// AVMIDIMetaEventTypeEndOfTrack: An event type that represents the end of the track.
	AVMIDIMetaEventTypeEndOfTrack AVMIDIMetaEventType = 47
	// AVMIDIMetaEventTypeInstrument: An event type that represents an instrument.
	AVMIDIMetaEventTypeInstrument AVMIDIMetaEventType = 4
	// AVMIDIMetaEventTypeKeySignature: An event type that represents a key signature.
	AVMIDIMetaEventTypeKeySignature AVMIDIMetaEventType = 89
	// AVMIDIMetaEventTypeLyric: An event type that represents a lyric.
	AVMIDIMetaEventTypeLyric AVMIDIMetaEventType = 5
	// AVMIDIMetaEventTypeMarker: An event type that represents a marker.
	AVMIDIMetaEventTypeMarker AVMIDIMetaEventType = 6
	// AVMIDIMetaEventTypeMidiChannel: An event type that represents a MIDI channel.
	AVMIDIMetaEventTypeMidiChannel AVMIDIMetaEventType = 32
	// AVMIDIMetaEventTypeMidiPort: An event type that represents a MIDI port.
	AVMIDIMetaEventTypeMidiPort AVMIDIMetaEventType = 33
	// AVMIDIMetaEventTypeProprietaryEvent: An event type that represents a proprietary event.
	AVMIDIMetaEventTypeProprietaryEvent AVMIDIMetaEventType = 127
	// AVMIDIMetaEventTypeSequenceNumber: An event type that represents a sequence number.
	AVMIDIMetaEventTypeSequenceNumber AVMIDIMetaEventType = 0
	// AVMIDIMetaEventTypeSmpteOffset: An event type that represents a SMPTE time offset.
	AVMIDIMetaEventTypeSmpteOffset AVMIDIMetaEventType = 84
	// AVMIDIMetaEventTypeTempo: An event type that represents a tempo.
	AVMIDIMetaEventTypeTempo AVMIDIMetaEventType = 81
	// AVMIDIMetaEventTypeText: An event type that represents text.
	AVMIDIMetaEventTypeText AVMIDIMetaEventType = 1
	// AVMIDIMetaEventTypeTimeSignature: An event type that represents a time signature.
	AVMIDIMetaEventTypeTimeSignature AVMIDIMetaEventType = 88
	// AVMIDIMetaEventTypeTrackName: An event type that represents a track name.
	AVMIDIMetaEventTypeTrackName AVMIDIMetaEventType = 3
)

func (AVMIDIMetaEventType) String 

func (e AVMIDIMetaEventType) String() string

type AVMIDINoteEvent 

type AVMIDINoteEvent struct {
	AVMusicEvent
}

An object that represents MIDI note on or off messages.

Creating a MIDI Note Event

Configuring a MIDI Note Event

See: https://developer.apple.com/documentation/AVFAudio/AVMIDINoteEvent

func AVMIDINoteEventFromID 

func AVMIDINoteEventFromID(id objc.ID) AVMIDINoteEvent

AVMIDINoteEventFromID constructs a AVMIDINoteEvent from an objc.ID.

An object that represents MIDI note on or off messages.

func NewAVMIDINoteEvent 

func NewAVMIDINoteEvent() AVMIDINoteEvent

NewAVMIDINoteEvent creates a new AVMIDINoteEvent instance.

func NewMIDINoteEventWithChannelKeyVelocityDuration 

func NewMIDINoteEventWithChannelKeyVelocityDuration(channel uint32, keyNum uint32, velocity uint32, duration AVMusicTimeStamp) AVMIDINoteEvent

Creates an event with a MIDI channel, key number, velocity, and duration.

channel: The MIDI channel, between `0` and `15`.

keyNum: The MIDI key number, between `0` and `127`.

velocity: The MIDI velocity, between `0` and `127`.

duration: The duration for this note, in beats.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDINoteEvent/init(channel:key:velocity:duration:)

func (AVMIDINoteEvent) Autorelease 

func (m AVMIDINoteEvent) Autorelease() AVMIDINoteEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMIDINoteEvent) Channel 

func (m AVMIDINoteEvent) Channel() uint32

The MIDI channel.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDINoteEvent/channel

func (AVMIDINoteEvent) Duration 

func (m AVMIDINoteEvent) Duration() AVMusicTimeStamp

The duration for the note, in beats.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDINoteEvent/duration

func (AVMIDINoteEvent) Init 

func (m AVMIDINoteEvent) Init() AVMIDINoteEvent

Init initializes the instance.

func (AVMIDINoteEvent) InitWithChannelKeyVelocityDuration 

func (m AVMIDINoteEvent) InitWithChannelKeyVelocityDuration(channel uint32, keyNum uint32, velocity uint32, duration AVMusicTimeStamp) AVMIDINoteEvent

Creates an event with a MIDI channel, key number, velocity, and duration.

channel: The MIDI channel, between `0` and `15`.

keyNum: The MIDI key number, between `0` and `127`.

velocity: The MIDI velocity, between `0` and `127`.

duration: The duration for this note, in beats.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDINoteEvent/init(channel:key:velocity:duration:)

func (AVMIDINoteEvent) Key 

func (m AVMIDINoteEvent) Key() uint32

The MIDI key number.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDINoteEvent/key

func (AVMIDINoteEvent) SetChannel 

func (m AVMIDINoteEvent) SetChannel(value uint32)

func (AVMIDINoteEvent) SetDuration 

func (m AVMIDINoteEvent) SetDuration(value AVMusicTimeStamp)

func (AVMIDINoteEvent) SetKey 

func (m AVMIDINoteEvent) SetKey(value uint32)

func (AVMIDINoteEvent) SetVelocity 

func (m AVMIDINoteEvent) SetVelocity(value uint32)

func (AVMIDINoteEvent) Velocity 

func (m AVMIDINoteEvent) Velocity() uint32

The MIDI velocity.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDINoteEvent/velocity

type AVMIDINoteEventClass 

type AVMIDINoteEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMIDINoteEventClass 

func GetAVMIDINoteEventClass() AVMIDINoteEventClass

GetAVMIDINoteEventClass returns the class object for AVMIDINoteEvent.

func (AVMIDINoteEventClass) Alloc 

func (ac AVMIDINoteEventClass) Alloc() AVMIDINoteEvent

Alloc allocates memory for a new instance of the class.

func (AVMIDINoteEventClass) Class 

func (ac AVMIDINoteEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMIDIPitchBendEvent 

type AVMIDIPitchBendEvent struct {
	AVMIDIChannelEvent
}

An object that represents a MIDI pitch bend message.

Creating a Pitch Bend Event

Configuring a Pitch Bend Event

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPitchBendEvent

func AVMIDIPitchBendEventFromID 

func AVMIDIPitchBendEventFromID(id objc.ID) AVMIDIPitchBendEvent

AVMIDIPitchBendEventFromID constructs a AVMIDIPitchBendEvent from an objc.ID.

An object that represents a MIDI pitch bend message.

func NewAVMIDIPitchBendEvent 

func NewAVMIDIPitchBendEvent() AVMIDIPitchBendEvent

NewAVMIDIPitchBendEvent creates a new AVMIDIPitchBendEvent instance.

func NewMIDIPitchBendEventWithChannelValue 

func NewMIDIPitchBendEventWithChannelValue(channel uint32, value uint32) AVMIDIPitchBendEvent

Creates an event with a channel and pitch bend value.

channel: The MIDI channel for the message, between `0` and `15`.

value: The pitch bend value, between `0` and `16383`.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPitchBendEvent/init(channel:value:)

func (AVMIDIPitchBendEvent) Autorelease 

func (m AVMIDIPitchBendEvent) Autorelease() AVMIDIPitchBendEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMIDIPitchBendEvent) Init 

func (m AVMIDIPitchBendEvent) Init() AVMIDIPitchBendEvent

Init initializes the instance.

func (AVMIDIPitchBendEvent) InitWithChannelValue 

func (m AVMIDIPitchBendEvent) InitWithChannelValue(channel uint32, value uint32) AVMIDIPitchBendEvent

Creates an event with a channel and pitch bend value.

channel: The MIDI channel for the message, between `0` and `15`.

value: The pitch bend value, between `0` and `16383`.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPitchBendEvent/init(channel:value:)

func (AVMIDIPitchBendEvent) SetValue 

func (m AVMIDIPitchBendEvent) SetValue(value uint32)

func (AVMIDIPitchBendEvent) Value 

func (m AVMIDIPitchBendEvent) Value() uint32

The value of the pitch bend event.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPitchBendEvent/value

type AVMIDIPitchBendEventClass 

type AVMIDIPitchBendEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMIDIPitchBendEventClass 

func GetAVMIDIPitchBendEventClass() AVMIDIPitchBendEventClass

GetAVMIDIPitchBendEventClass returns the class object for AVMIDIPitchBendEvent.

func (AVMIDIPitchBendEventClass) Alloc 

func (ac AVMIDIPitchBendEventClass) Alloc() AVMIDIPitchBendEvent

Alloc allocates memory for a new instance of the class.

func (AVMIDIPitchBendEventClass) Class 

func (ac AVMIDIPitchBendEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMIDIPlayer 

type AVMIDIPlayer struct {
	objectivec.Object
}

An object that plays MIDI data through a system sound module.

Overview

For more information about preparing your app to play audio, see Configuring your app for media playback.

Creating a MIDI player

Controlling playback

Configuring playback settings

Accessing player timing

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer

func AVMIDIPlayerFromID 

func AVMIDIPlayerFromID(id objc.ID) AVMIDIPlayer

AVMIDIPlayerFromID constructs a AVMIDIPlayer from an objc.ID.

An object that plays MIDI data through a system sound module.

func NewAVMIDIPlayer 

func NewAVMIDIPlayer() AVMIDIPlayer

NewAVMIDIPlayer creates a new AVMIDIPlayer instance.

func NewMIDIPlayerWithContentsOfURLSoundBankURLError 

func NewMIDIPlayerWithContentsOfURLSoundBankURLError(inURL foundation.INSURL, bankURL foundation.INSURL) (AVMIDIPlayer, error)

Creates a player to play a MIDI file with the specified soundbank.

inURL: The URL of the file to play.

bankURL: The URL of the sound bank. The sound bank must be in SoundFont2 or DLS format. In macOS, you can pass nil for the bank URL argument to use the default sound bank. In iOS, you must always pass a valid bank file.

Return Value

A new MIDI player, or nil if an error occurred.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/init(contentsOf:soundBankURL:)

func NewMIDIPlayerWithDataSoundBankURLError 

func NewMIDIPlayerWithDataSoundBankURLError(data foundation.INSData, bankURL foundation.INSURL) (AVMIDIPlayer, error)

Creates a player to play MIDI data with the specified soundbank.

data: The data to play.

bankURL: The URL of the sound bank. The sound bank must be a SoundFont2 or DLS bank. In macOS, you can pass nil for the bank URL argument to use the default sound bank. In iOS, you must always pass a valid bank file.

Return Value

A new MIDI player, or nil if an error occurred.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/init(data:soundBankURL:)

func (AVMIDIPlayer) Autorelease 

func (m AVMIDIPlayer) Autorelease() AVMIDIPlayer

Autorelease adds the receiver to the current autorelease pool.

func (AVMIDIPlayer) CurrentPosition 

func (m AVMIDIPlayer) CurrentPosition() float64

The current playback position, in seconds.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/currentPosition

func (AVMIDIPlayer) Duration 

func (m AVMIDIPlayer) Duration() float64

The duration, in seconds, of the currently loaded file.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/duration

func (AVMIDIPlayer) Init 

func (m AVMIDIPlayer) Init() AVMIDIPlayer

Init initializes the instance.

func (AVMIDIPlayer) InitWithContentsOfURLSoundBankURLError 

func (m AVMIDIPlayer) InitWithContentsOfURLSoundBankURLError(inURL foundation.INSURL, bankURL foundation.INSURL) (AVMIDIPlayer, error)

Creates a player to play a MIDI file with the specified soundbank.

inURL: The URL of the file to play.

bankURL: The URL of the sound bank. The sound bank must be in SoundFont2 or DLS format. In macOS, you can pass nil for the bank URL argument to use the default sound bank. In iOS, you must always pass a valid bank file.

Return Value

A new MIDI player, or nil if an error occurred.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/init(contentsOf:soundBankURL:)

func (AVMIDIPlayer) InitWithDataSoundBankURLError 

func (m AVMIDIPlayer) InitWithDataSoundBankURLError(data foundation.INSData, bankURL foundation.INSURL) (AVMIDIPlayer, error)

Creates a player to play MIDI data with the specified soundbank.

data: The data to play.

bankURL: The URL of the sound bank. The sound bank must be a SoundFont2 or DLS bank. In macOS, you can pass nil for the bank URL argument to use the default sound bank. In iOS, you must always pass a valid bank file.

Return Value

A new MIDI player, or nil if an error occurred.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/init(data:soundBankURL:)

func (AVMIDIPlayer) Play 

func (m AVMIDIPlayer) Play(completionHandler ErrorHandler)

Plays the MIDI sequence.

completionHandler: A closure the system calls when playback completes.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/play(_:)

func (AVMIDIPlayer) Playing 

func (m AVMIDIPlayer) Playing() bool

A Boolean value that indicates whether the sequence is playing.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/isPlaying

func (AVMIDIPlayer) PrepareToPlay 

func (m AVMIDIPlayer) PrepareToPlay()

Prepares the player to play the sequence by prerolling all events.

Discussion

The system automatically calls this method on playback, but calling it in advance minimizes the delay between calling [Play] and the start of sound output.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/prepareToPlay()

func (AVMIDIPlayer) Rate 

func (m AVMIDIPlayer) Rate() float32

The playback rate of the player.

Discussion

The default value is `1.0,` the standard playback rate.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/rate

func (AVMIDIPlayer) SetCurrentPosition 

func (m AVMIDIPlayer) SetCurrentPosition(value float64)

func (AVMIDIPlayer) SetRate 

func (m AVMIDIPlayer) SetRate(value float32)

func (AVMIDIPlayer) Stop 

func (m AVMIDIPlayer) Stop()

Stops playing the sequence.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer/stop()

type AVMIDIPlayerClass 

type AVMIDIPlayerClass struct {
	// contains filtered or unexported fields
}

func GetAVMIDIPlayerClass 

func GetAVMIDIPlayerClass() AVMIDIPlayerClass

GetAVMIDIPlayerClass returns the class object for AVMIDIPlayer.

func (AVMIDIPlayerClass) Alloc 

func (ac AVMIDIPlayerClass) Alloc() AVMIDIPlayer

Alloc allocates memory for a new instance of the class.

func (AVMIDIPlayerClass) Class 

func (ac AVMIDIPlayerClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMIDIPlayerCompletionHandler 

type AVMIDIPlayerCompletionHandler = func()

AVMIDIPlayerCompletionHandler is a callback the system invokes when MIDI playback completes.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayerCompletionHandler

type AVMIDIPolyPressureEvent 

type AVMIDIPolyPressureEvent struct {
	AVMIDIChannelEvent
}

An object that represents a MIDI poly or key pressure event.

Creating a Poly Pressure Event

Configuring a Poly Pressure Event

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPolyPressureEvent

func AVMIDIPolyPressureEventFromID 

func AVMIDIPolyPressureEventFromID(id objc.ID) AVMIDIPolyPressureEvent

AVMIDIPolyPressureEventFromID constructs a AVMIDIPolyPressureEvent from an objc.ID.

An object that represents a MIDI poly or key pressure event.

func NewAVMIDIPolyPressureEvent 

func NewAVMIDIPolyPressureEvent() AVMIDIPolyPressureEvent

NewAVMIDIPolyPressureEvent creates a new AVMIDIPolyPressureEvent instance.

func NewMIDIPolyPressureEventWithChannelKeyPressure 

func NewMIDIPolyPressureEventWithChannelKeyPressure(channel uint32, key uint32, pressure uint32) AVMIDIPolyPressureEvent

Creates an event with a channel, MIDI key number, and a key pressure value.

channel: The MIDI channel for the message, between `0` and `15`.

key: The MIDI key number to apply the pressure to.

pressure: The poly pressure value.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPolyPressureEvent/init(channel:key:pressure:)

func (AVMIDIPolyPressureEvent) Autorelease 

func (m AVMIDIPolyPressureEvent) Autorelease() AVMIDIPolyPressureEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMIDIPolyPressureEvent) Init 

func (m AVMIDIPolyPressureEvent) Init() AVMIDIPolyPressureEvent

Init initializes the instance.

func (AVMIDIPolyPressureEvent) InitWithChannelKeyPressure 

func (m AVMIDIPolyPressureEvent) InitWithChannelKeyPressure(channel uint32, key uint32, pressure uint32) AVMIDIPolyPressureEvent

Creates an event with a channel, MIDI key number, and a key pressure value.

channel: The MIDI channel for the message, between `0` and `15`.

key: The MIDI key number to apply the pressure to.

pressure: The poly pressure value.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPolyPressureEvent/init(channel:key:pressure:)

func (AVMIDIPolyPressureEvent) Key 

func (m AVMIDIPolyPressureEvent) Key() uint32

The MIDI key number.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPolyPressureEvent/key

func (AVMIDIPolyPressureEvent) Pressure 

func (m AVMIDIPolyPressureEvent) Pressure() uint32

The poly pressure value for the requested key.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPolyPressureEvent/pressure

func (AVMIDIPolyPressureEvent) SetKey 

func (m AVMIDIPolyPressureEvent) SetKey(value uint32)

func (AVMIDIPolyPressureEvent) SetPressure 

func (m AVMIDIPolyPressureEvent) SetPressure(value uint32)

type AVMIDIPolyPressureEventClass 

type AVMIDIPolyPressureEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMIDIPolyPressureEventClass 

func GetAVMIDIPolyPressureEventClass() AVMIDIPolyPressureEventClass

GetAVMIDIPolyPressureEventClass returns the class object for AVMIDIPolyPressureEvent.

func (AVMIDIPolyPressureEventClass) Alloc 

func (ac AVMIDIPolyPressureEventClass) Alloc() AVMIDIPolyPressureEvent

Alloc allocates memory for a new instance of the class.

func (AVMIDIPolyPressureEventClass) Class 

func (ac AVMIDIPolyPressureEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMIDIProgramChangeEvent 

type AVMIDIProgramChangeEvent struct {
	AVMIDIChannelEvent
}

An object that represents a MIDI program or patch change message.

Overview

The effect of this message depends on the AVMusicTrack destination audio unit.

Creating a Program Change Event

Configuring a Program Change Event

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIProgramChangeEvent

func AVMIDIProgramChangeEventFromID 

func AVMIDIProgramChangeEventFromID(id objc.ID) AVMIDIProgramChangeEvent

AVMIDIProgramChangeEventFromID constructs a AVMIDIProgramChangeEvent from an objc.ID.

An object that represents a MIDI program or patch change message.

func NewAVMIDIProgramChangeEvent 

func NewAVMIDIProgramChangeEvent() AVMIDIProgramChangeEvent

NewAVMIDIProgramChangeEvent creates a new AVMIDIProgramChangeEvent instance.

func NewMIDIProgramChangeEventWithChannelProgramNumber 

func NewMIDIProgramChangeEventWithChannelProgramNumber(channel uint32, programNumber uint32) AVMIDIProgramChangeEvent

Creates a program change event with a channel and program number.

channel: The MIDI channel for the message, between `0` and `15`.

programNumber: The program number to send, between `0` and `127`.

Discussion

The instrument this chooses depends on AVMIDIControlChangeMessageTypeBankSelect events sent prior to this event.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIProgramChangeEvent/init(channel:programNumber:)

func (AVMIDIProgramChangeEvent) Autorelease 

func (m AVMIDIProgramChangeEvent) Autorelease() AVMIDIProgramChangeEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMIDIProgramChangeEvent) Init 

func (m AVMIDIProgramChangeEvent) Init() AVMIDIProgramChangeEvent

Init initializes the instance.

func (AVMIDIProgramChangeEvent) InitWithChannelProgramNumber 

func (m AVMIDIProgramChangeEvent) InitWithChannelProgramNumber(channel uint32, programNumber uint32) AVMIDIProgramChangeEvent

Creates a program change event with a channel and program number.

channel: The MIDI channel for the message, between `0` and `15`.

programNumber: The program number to send, between `0` and `127`.

Discussion

The instrument this chooses depends on AVMIDIControlChangeMessageTypeBankSelect events sent prior to this event.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIProgramChangeEvent/init(channel:programNumber:)

func (AVMIDIProgramChangeEvent) ProgramNumber 

func (m AVMIDIProgramChangeEvent) ProgramNumber() uint32

The MIDI program number.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIProgramChangeEvent/programNumber

func (AVMIDIProgramChangeEvent) SetProgramNumber 

func (m AVMIDIProgramChangeEvent) SetProgramNumber(value uint32)

type AVMIDIProgramChangeEventClass 

type AVMIDIProgramChangeEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMIDIProgramChangeEventClass 

func GetAVMIDIProgramChangeEventClass() AVMIDIProgramChangeEventClass

GetAVMIDIProgramChangeEventClass returns the class object for AVMIDIProgramChangeEvent.

func (AVMIDIProgramChangeEventClass) Alloc 

func (ac AVMIDIProgramChangeEventClass) Alloc() AVMIDIProgramChangeEvent

Alloc allocates memory for a new instance of the class.

func (AVMIDIProgramChangeEventClass) Class 

func (ac AVMIDIProgramChangeEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMIDISysexEvent 

type AVMIDISysexEvent struct {
	AVMusicEvent
}

An object that represents a MIDI system exclusive message.

Overview

You can’t modify the size and contents of this event once you create it.

Creates a System Event

Getting the Size of the Event

See: https://developer.apple.com/documentation/AVFAudio/AVMIDISysexEvent

func AVMIDISysexEventFromID 

func AVMIDISysexEventFromID(id objc.ID) AVMIDISysexEvent

AVMIDISysexEventFromID constructs a AVMIDISysexEvent from an objc.ID.

An object that represents a MIDI system exclusive message.

func NewAVMIDISysexEvent 

func NewAVMIDISysexEvent() AVMIDISysexEvent

NewAVMIDISysexEvent creates a new AVMIDISysexEvent instance.

func NewMIDISysexEventWithData 

func NewMIDISysexEventWithData(data foundation.INSData) AVMIDISysexEvent

Creates a system event with the data you specify.

data: The data that contains the contents of the system event.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDISysexEvent/init(data:)

func (AVMIDISysexEvent) Autorelease 

func (m AVMIDISysexEvent) Autorelease() AVMIDISysexEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMIDISysexEvent) Init 

func (m AVMIDISysexEvent) Init() AVMIDISysexEvent

Init initializes the instance.

func (AVMIDISysexEvent) InitWithData 

func (m AVMIDISysexEvent) InitWithData(data foundation.INSData) AVMIDISysexEvent

Creates a system event with the data you specify.

data: The data that contains the contents of the system event.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDISysexEvent/init(data:)

func (AVMIDISysexEvent) SizeInBytes 

func (m AVMIDISysexEvent) SizeInBytes() uint32

The size of the data that this event contains.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDISysexEvent/sizeInBytes

type AVMIDISysexEventClass 

type AVMIDISysexEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMIDISysexEventClass 

func GetAVMIDISysexEventClass() AVMIDISysexEventClass

GetAVMIDISysexEventClass returns the class object for AVMIDISysexEvent.

func (AVMIDISysexEventClass) Alloc 

func (ac AVMIDISysexEventClass) Alloc() AVMIDISysexEvent

Alloc allocates memory for a new instance of the class.

func (AVMIDISysexEventClass) Class 

func (ac AVMIDISysexEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMusicEvent 

type AVMusicEvent struct {
	objectivec.Object
}

A base class for the events you associate with a music track.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicEvent

func AVMusicEventFromID 

func AVMusicEventFromID(id objc.ID) AVMusicEvent

AVMusicEventFromID constructs a AVMusicEvent from an objc.ID.

A base class for the events you associate with a music track.

func NewAVMusicEvent 

func NewAVMusicEvent() AVMusicEvent

NewAVMusicEvent creates a new AVMusicEvent instance.

func (AVMusicEvent) Autorelease 

func (m AVMusicEvent) Autorelease() AVMusicEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMusicEvent) Init 

func (m AVMusicEvent) Init() AVMusicEvent

Init initializes the instance.

type AVMusicEventClass 

type AVMusicEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMusicEventClass 

func GetAVMusicEventClass() AVMusicEventClass

GetAVMusicEventClass returns the class object for AVMusicEvent.

func (AVMusicEventClass) Alloc 

func (ac AVMusicEventClass) Alloc() AVMusicEvent

Alloc allocates memory for a new instance of the class.

func (AVMusicEventClass) Class 

func (ac AVMusicEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMusicEventEnumerationBlock 

type AVMusicEventEnumerationBlock = func(AVMusicEvent, []float64, *bool)

AVMusicEventEnumerationBlock is a type you use to enumerate and remove music events, if necessary.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicEventEnumerationBlock

type AVMusicSequenceLoadOptions 

type AVMusicSequenceLoadOptions uint

See: https://developer.apple.com/documentation/AVFAudio/AVMusicSequenceLoadOptions 

const (
	// AVMusicSequenceLoadSMF_ChannelsToTracks: An option that represents data on different MIDI channels mapped to multiple tracks.
	AVMusicSequenceLoadSMF_ChannelsToTracks AVMusicSequenceLoadOptions = 1
	// AVMusicSequenceLoadSMF_PreserveTracks: An option that preserves the tracks as they are.
	AVMusicSequenceLoadSMF_PreserveTracks AVMusicSequenceLoadOptions = 0
)

func (AVMusicSequenceLoadOptions) String 

func (e AVMusicSequenceLoadOptions) String() string

type AVMusicTimeStamp 

type AVMusicTimeStamp = float64

AVMusicTimeStamp is a fractional number of beats.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTimeStamp

type AVMusicTrack 

type AVMusicTrack struct {
	objectivec.Object
}

A collection of music events that you can offset, set to a muted state, modify independently from other track events, and send to a specified destination.

Configuring Music Track Properties

Configuring the Track Duration

Configuring the Track Destinations

Configuring the Looping State

Adding and Clearing Events

Cutting and Copying Events

Iterating Over Events

Getting the End of Track Timestamp

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack

func AVMusicTrackFromID 

func AVMusicTrackFromID(id objc.ID) AVMusicTrack

AVMusicTrackFromID constructs a AVMusicTrack from an objc.ID.

A collection of music events that you can offset, set to a muted state, modify independently from other track events, and send to a specified destination.

func NewAVMusicTrack 

func NewAVMusicTrack() AVMusicTrack

NewAVMusicTrack creates a new AVMusicTrack instance.

func (AVMusicTrack) AVMusicTimeStampEndOfTrack 

func (m AVMusicTrack) AVMusicTimeStampEndOfTrack() float64

A timestamp you use to access all events in a music track through a beat range.

See: https://developer.apple.com/documentation/avfaudio/avmusictimestampendoftrack

func (AVMusicTrack) AddEventAtBeat 

func (m AVMusicTrack) AddEventAtBeat(event IAVMusicEvent, beat AVMusicTimeStamp)

Adds a music event to a track at the time you specify.

event: The event to add.

beat: The time to add the event at.

Discussion

The system copies event contents into the track, so you can add the same event at different timestamps. You can’t add all AVMusicEvent subclasses to a track.

- You can only add AVExtendedTempoEvent and AVMIDIMetaEvent with certain AVMIDIMetaEvent.EventType to a sequencer’s tempo track. - You can add AVParameterEvent to automation tracks. - You can’t add other event subclasses to tempo or automation tracks.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/addEvent(_:at:)

func (AVMusicTrack) Autorelease 

func (m AVMusicTrack) Autorelease() AVMusicTrack

Autorelease adds the receiver to the current autorelease pool.

func (AVMusicTrack) ClearEventsInRange 

func (m AVMusicTrack) ClearEventsInRange(range_ AVBeatRange)

Removes all events in the given beat range from the music track.

range: The range of beats.

Discussion

The system won’t modify the events outside of the range you specify.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/clearEvents(in:)

func (AVMusicTrack) CopyAndMergeEventsInRangeFromTrackMergeAtBeat 

func (m AVMusicTrack) CopyAndMergeEventsInRangeFromTrackMergeAtBeat(range_ AVBeatRange, sourceTrack IAVMusicTrack, mergeStartBeat AVMusicTimeStamp)

Copies the events from the source track and merges them into the current music track.

range: The range of beats.

sourceTrack: The music track to copy the events from.

mergeStartBeat: The start beat where the copied events merge into.

Discussion

The system won’t modify events originally at or past the start beat. Copying events from track to track follows the same type-exclusion rules as adding events.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/copyAndMergeEvents(in:from:mergeAt:)

func (AVMusicTrack) CopyEventsInRangeFromTrackInsertAtBeat 

func (m AVMusicTrack) CopyEventsInRangeFromTrackInsertAtBeat(range_ AVBeatRange, sourceTrack IAVMusicTrack, insertStartBeat AVMusicTimeStamp)

Copies the events from the source track and splices them into the current music track.

range: The range of beats.

sourceTrack: The music track to copy the events from.

insertStartBeat: The start beat to splice the events into.

Discussion

All events originally at or past the insertion beat shift forward by the duration of the copied-in range.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/copyEvents(in:from:insertAt:)

func (AVMusicTrack) CutEventsInRange 

func (m AVMusicTrack) CutEventsInRange(range_ AVBeatRange)

Splices all events in the beat range from the music track.

range: The range of beats.

Discussion

All events past the end of the range you specify shift backward by the duration of the range.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/cutEvents(in:)

func (AVMusicTrack) DestinationAudioUnit 

func (m AVMusicTrack) DestinationAudioUnit() IAVAudioUnit

The audio unit that receives the track’s events.

Discussion

This property and a [DestinationMIDIEndpoint] are mutually exclusive. You must attach the audio to an audio engine to receive events. The track must be part of the AVAudioSequencer you associate with the same engine. When playing, the track sends it’s events to that AVAudioUnit. You can’t change the destination audio unit while the track’s sequence is in a playing state.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/destinationAudioUnit

func (AVMusicTrack) DestinationMIDIEndpoint 

func (m AVMusicTrack) DestinationMIDIEndpoint() objectivec.IObject

The MIDI endpoint you specify as the track’s target.

Discussion

This property and a [DestinationAudioUnit] are mutually exclusive. Setting this property removes the track’s reference to an AVAudioUnit destination. When playing, the track sends events to the MIDI endpoint. For more information, see MIDIDestinationCreate(_:_:_:_:_:). You can’t change the endpoint while the track’s sequence is in a playing state.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/destinationMIDIEndpoint

func (AVMusicTrack) EnumerateEventsInRangeUsingBlock 

func (m AVMusicTrack) EnumerateEventsInRangeUsingBlock(range_ AVBeatRange, block AVMusicEventEnumerationBlock)

Iterates through the music events within the track.

range: The range to iterate through.

block: The block to call for each event.

Discussion

Examine each event the block returns by using isKind(of:) to determine the subclass, and then cast and access it accordingly.

The iteration may continue after removing an event.

The event object returned through the block won’t be the same instances you add to the AVMusicTrack, though the content is identical.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/enumerateEvents(in:using:)

func (AVMusicTrack) Init 

func (m AVMusicTrack) Init() AVMusicTrack

Init initializes the instance.

func (AVMusicTrack) LengthInBeats 

func (m AVMusicTrack) LengthInBeats() AVMusicTimeStamp

The total duration of the track, in beats.

Discussion

This property returns the beat of the last event in the track, plus any additional time that’s necessary to fade out the ending notes, or to round a loop point to a musical bar.

If the user doesn’t set this value, the track length always adjusts to the end of the last active event in a track, and adjusts dynamically as the user adds or removes events.

This property returns the maximum of the user-set track length or the calculated length.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/lengthInBeats

func (AVMusicTrack) LengthInSeconds 

func (m AVMusicTrack) LengthInSeconds() float64

The total duration of the track, in seconds.

Discussion

This property returns the time of the last event in the track, plus any additional time that’s necessary to fade out the ending notes, or to round a loop point to a musical bar.

If the user doesn’t set this value, the track length always adjusts to the end of the last active event in a track, and adjusts dynamically as the user adds or removes events.

This property returns the maximum of the user-set track length or the calculated length.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/lengthInSeconds

func (AVMusicTrack) LoopRange 

func (m AVMusicTrack) LoopRange() AVBeatRange

The timestamp range for the loop, in beats.

Discussion

You set the loop by specifying its beat range.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/loopRange

func (AVMusicTrack) LoopingEnabled 

func (m AVMusicTrack) LoopingEnabled() bool

A Boolean value that indicates whether the track is in a looping state.

Discussion

If you don’t set [LoopRange], the framework loops the full track.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/isLoopingEnabled

func (AVMusicTrack) MoveEventsInRangeByAmount 

func (m AVMusicTrack) MoveEventsInRangeByAmount(range_ AVBeatRange, beatAmount AVMusicTimeStamp)

Moves the beat location of all events in the given beat range by the amount you specify.

range: The range of beats.

beatAmount: The amount of beats to shift each event.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/moveEvents(in:by:)

func (AVMusicTrack) Muted 

func (m AVMusicTrack) Muted() bool

A Boolean value that indicates whether the track is in a muted state.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/isMuted

func (AVMusicTrack) NumberOfLoops 

func (m AVMusicTrack) NumberOfLoops() int

The number of times the track’s loop repeats.

Discussion

Use the value AVMusicTrackLoopCountForever to loop the track forever. Otherwise, valid values start at `1`.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/numberOfLoops

func (AVMusicTrack) OffsetTime 

func (m AVMusicTrack) OffsetTime() AVMusicTimeStamp

The offset of the track’s start time, in beats.

Discussion

By default, this value is `0`.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/offsetTime

func (AVMusicTrack) SetAVMusicTimeStampEndOfTrack 

func (m AVMusicTrack) SetAVMusicTimeStampEndOfTrack(value float64)

func (AVMusicTrack) SetDestinationAudioUnit 

func (m AVMusicTrack) SetDestinationAudioUnit(value IAVAudioUnit)

func (AVMusicTrack) SetDestinationMIDIEndpoint 

func (m AVMusicTrack) SetDestinationMIDIEndpoint(value objectivec.IObject)

func (AVMusicTrack) SetLengthInBeats 

func (m AVMusicTrack) SetLengthInBeats(value AVMusicTimeStamp)

func (AVMusicTrack) SetLengthInSeconds 

func (m AVMusicTrack) SetLengthInSeconds(value float64)

func (AVMusicTrack) SetLoopRange 

func (m AVMusicTrack) SetLoopRange(value AVBeatRange)

func (AVMusicTrack) SetLoopingEnabled 

func (m AVMusicTrack) SetLoopingEnabled(value bool)

func (AVMusicTrack) SetMuted 

func (m AVMusicTrack) SetMuted(value bool)

func (AVMusicTrack) SetNumberOfLoops 

func (m AVMusicTrack) SetNumberOfLoops(value int)

func (AVMusicTrack) SetOffsetTime 

func (m AVMusicTrack) SetOffsetTime(value AVMusicTimeStamp)

func (AVMusicTrack) SetSoloed 

func (m AVMusicTrack) SetSoloed(value bool)

func (AVMusicTrack) SetUsesAutomatedParameters 

func (m AVMusicTrack) SetUsesAutomatedParameters(value bool)

func (AVMusicTrack) Soloed 

func (m AVMusicTrack) Soloed() bool

A Boolean value that indicates whether the track is in a soloed state.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/isSoloed

func (AVMusicTrack) TimeResolution 

func (m AVMusicTrack) TimeResolution() uint

The time resolution value for the sequence, in ticks (pulses) per quarter note.

Discussion

If you use a MIDI file to construct the containing sequence, the resolution is the contents of the file. If you want to keep a time resolution when writing a new file, retrieve this value and then specify it when writing to an audio sequencer. It doesn’t affect the rendering or notion of time of the sequence — only it’s MIDI file representation.

By default, the framework sets this value to `480` when creating the sequence manually, or to a value from a MIDI file if you use it to create the sequence.

You can only retrieve this value from the tempo track.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/timeResolution

func (AVMusicTrack) UsesAutomatedParameters 

func (m AVMusicTrack) UsesAutomatedParameters() bool

A Boolean value that indicates whether the track is an automation track.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack/usesAutomatedParameters

type AVMusicTrackClass 

type AVMusicTrackClass struct {
	// contains filtered or unexported fields
}

func GetAVMusicTrackClass 

func GetAVMusicTrackClass() AVMusicTrackClass

GetAVMusicTrackClass returns the class object for AVMusicTrack.

func (AVMusicTrackClass) Alloc 

func (ac AVMusicTrackClass) Alloc() AVMusicTrack

Alloc allocates memory for a new instance of the class.

func (AVMusicTrackClass) Class 

func (ac AVMusicTrackClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVMusicTrackLoopCount 

type AVMusicTrackLoopCount int

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrackLoopCount 

const (
	// AVMusicTrackLoopCountForever: A track that loops forever.
	AVMusicTrackLoopCountForever AVMusicTrackLoopCount = -1
)

func (AVMusicTrackLoopCount) String 

func (e AVMusicTrackLoopCount) String() string

type AVMusicUserEvent 

type AVMusicUserEvent struct {
	AVMusicEvent
}

An object that represents a custom user message.

Overview

When playback of an AVMusicTrack reaches this event, the system calls the track’s callback. You can’t modify the size and contents of an AVMusicUserEvent once you create it.

Creating a User Event

Inspecting a User Event

See: https://developer.apple.com/documentation/AVFAudio/AVMusicUserEvent

func AVMusicUserEventFromID 

func AVMusicUserEventFromID(id objc.ID) AVMusicUserEvent

AVMusicUserEventFromID constructs a AVMusicUserEvent from an objc.ID.

An object that represents a custom user message.

func NewAVMusicUserEvent 

func NewAVMusicUserEvent() AVMusicUserEvent

NewAVMusicUserEvent creates a new AVMusicUserEvent instance.

func NewMusicUserEventWithData 

func NewMusicUserEventWithData(data foundation.INSData) AVMusicUserEvent

Creates a user event with the data you specify.

data: The contents a music track returns on callback.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicUserEvent/init(data:)

func (AVMusicUserEvent) Autorelease 

func (m AVMusicUserEvent) Autorelease() AVMusicUserEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVMusicUserEvent) Init 

func (m AVMusicUserEvent) Init() AVMusicUserEvent

Init initializes the instance.

func (AVMusicUserEvent) InitWithData 

func (m AVMusicUserEvent) InitWithData(data foundation.INSData) AVMusicUserEvent

Creates a user event with the data you specify.

data: The contents a music track returns on callback.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicUserEvent/init(data:)

func (AVMusicUserEvent) SizeInBytes 

func (m AVMusicUserEvent) SizeInBytes() uint32

The size of the data that the user event represents.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicUserEvent/sizeInBytes

type AVMusicUserEventClass 

type AVMusicUserEventClass struct {
	// contains filtered or unexported fields
}

func GetAVMusicUserEventClass 

func GetAVMusicUserEventClass() AVMusicUserEventClass

GetAVMusicUserEventClass returns the class object for AVMusicUserEvent.

func (AVMusicUserEventClass) Alloc 

func (ac AVMusicUserEventClass) Alloc() AVMusicUserEvent

Alloc allocates memory for a new instance of the class.

func (AVMusicUserEventClass) Class 

func (ac AVMusicUserEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVParameterEvent 

type AVParameterEvent struct {
	AVMusicEvent
}

An object that represents a parameter event on a music track’s destination.

Overview

When you configure an audio unit as the destination for an AVMusicTrack that contains this event, you can schedule and automate parameter changes.

When the track is playing as part of a sequence, the destination audio unit receives set-parameter messages whose values change smoothly along a linear ramp between each event’s beat location.

If you add an event to an empty, non-automation track, the track becomes an automation track.

Creating a Parameter Event

Configuring a Parameter Event

See: https://developer.apple.com/documentation/AVFAudio/AVParameterEvent

func AVParameterEventFromID 

func AVParameterEventFromID(id objc.ID) AVParameterEvent

AVParameterEventFromID constructs a AVParameterEvent from an objc.ID.

An object that represents a parameter event on a music track’s destination.

func NewAVParameterEvent 

func NewAVParameterEvent() AVParameterEvent

NewAVParameterEvent creates a new AVParameterEvent instance.

func NewParameterEventWithParameterIDScopeElementValue 

func NewParameterEventWithParameterIDScopeElementValue(parameterID uint32, scope uint32, element uint32, value float32) AVParameterEvent

Creates an event with a parameter identifier, scope, element, and value for the parameter to set.

parameterID: The identifier of the parameter.

scope: The audio unit scope for the parameter.

element: The element index in the scope.

value: The value of the parameter to set.

Discussion

For more information about the parameters, see AudioUnitParameterID, AudioUnitScope, and AudioUnitElement. The valid range of values depend on the parameter you set.

See: https://developer.apple.com/documentation/AVFAudio/AVParameterEvent/init(parameterID:scope:element:value:)

func (AVParameterEvent) Autorelease 

func (p AVParameterEvent) Autorelease() AVParameterEvent

Autorelease adds the receiver to the current autorelease pool.

func (AVParameterEvent) Element 

func (p AVParameterEvent) Element() uint32

The element index in the scope.

See: https://developer.apple.com/documentation/AVFAudio/AVParameterEvent/element

func (AVParameterEvent) Init 

func (p AVParameterEvent) Init() AVParameterEvent

Init initializes the instance.

func (AVParameterEvent) InitWithParameterIDScopeElementValue 

func (p AVParameterEvent) InitWithParameterIDScopeElementValue(parameterID uint32, scope uint32, element uint32, value float32) AVParameterEvent

Creates an event with a parameter identifier, scope, element, and value for the parameter to set.

parameterID: The identifier of the parameter.

scope: The audio unit scope for the parameter.

element: The element index in the scope.

value: The value of the parameter to set.

Discussion

For more information about the parameters, see AudioUnitParameterID, AudioUnitScope, and AudioUnitElement. The valid range of values depend on the parameter you set.

See: https://developer.apple.com/documentation/AVFAudio/AVParameterEvent/init(parameterID:scope:element:value:)

func (AVParameterEvent) ParameterID 

func (p AVParameterEvent) ParameterID() uint32

The identifier of the parameter.

See: https://developer.apple.com/documentation/AVFAudio/AVParameterEvent/parameterID

func (AVParameterEvent) Scope 

func (p AVParameterEvent) Scope() uint32

The audio unit scope for the parameter.

See: https://developer.apple.com/documentation/AVFAudio/AVParameterEvent/scope

func (AVParameterEvent) SetElement 

func (p AVParameterEvent) SetElement(value uint32)

func (AVParameterEvent) SetParameterID 

func (p AVParameterEvent) SetParameterID(value uint32)

func (AVParameterEvent) SetScope 

func (p AVParameterEvent) SetScope(value uint32)

func (AVParameterEvent) SetValue 

func (p AVParameterEvent) SetValue(value float32)

func (AVParameterEvent) Value 

func (p AVParameterEvent) Value() float32

The value of the parameter to set.

See: https://developer.apple.com/documentation/AVFAudio/AVParameterEvent/value

type AVParameterEventClass 

type AVParameterEventClass struct {
	// contains filtered or unexported fields
}

func GetAVParameterEventClass 

func GetAVParameterEventClass() AVParameterEventClass

GetAVParameterEventClass returns the class object for AVParameterEvent.

func (AVParameterEventClass) Alloc 

func (ac AVParameterEventClass) Alloc() AVParameterEvent

Alloc allocates memory for a new instance of the class.

func (AVParameterEventClass) Class 

func (ac AVParameterEventClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVSpeechBoundary 

type AVSpeechBoundary int

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechBoundary 

const (
	// AVSpeechBoundaryImmediate: Indicates to pause or stop speech immediately.
	AVSpeechBoundaryImmediate AVSpeechBoundary = 0
	// AVSpeechBoundaryWord: Indicates to pause or stop speech after the synthesizer finishes speaking the current word.
	AVSpeechBoundaryWord AVSpeechBoundary = 1
)

func (AVSpeechBoundary) String 

func (e AVSpeechBoundary) String() string

type AVSpeechSynthesisMarker 

type AVSpeechSynthesisMarker struct {
	objectivec.Object
}

An object that contains information about the synthesized audio.

Creating a marker

Inspecting a marker

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker

func AVSpeechSynthesisMarkerFromID 

func AVSpeechSynthesisMarkerFromID(id objc.ID) AVSpeechSynthesisMarker

AVSpeechSynthesisMarkerFromID constructs a AVSpeechSynthesisMarker from an objc.ID.

An object that contains information about the synthesized audio.

func NewAVSpeechSynthesisMarker 

func NewAVSpeechSynthesisMarker() AVSpeechSynthesisMarker

NewAVSpeechSynthesisMarker creates a new AVSpeechSynthesisMarker instance.

func NewSpeechSynthesisMarkerWithBookmarkNameAtByteSampleOffset 

func NewSpeechSynthesisMarkerWithBookmarkNameAtByteSampleOffset(mark string, byteSampleOffset int) AVSpeechSynthesisMarker

Creates a bookmark marker with a name and offset into the audio buffer.

mark: The name of the bookmark.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(bookmarkName:atByteSampleOffset:)

func NewSpeechSynthesisMarkerWithMarkerTypeForTextRangeAtByteSampleOffset 

func NewSpeechSynthesisMarkerWithMarkerTypeForTextRangeAtByteSampleOffset(type_ AVSpeechSynthesisMarkerMark, range_ foundation.NSRange, byteSampleOffset uint) AVSpeechSynthesisMarker

Creates a marker with a type and location of the request’s text.

type: The type that describes the text.

range: The location and length of the request’s text.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(markerType:forTextRange:atByteSampleOffset:)

func NewSpeechSynthesisMarkerWithParagraphRangeAtByteSampleOffset 

func NewSpeechSynthesisMarkerWithParagraphRangeAtByteSampleOffset(range_ foundation.NSRange, byteSampleOffset int) AVSpeechSynthesisMarker

Creates a paragraph marker with a range of the paragraph and offset into the audio buffer.

range: The location and length of the paragraph.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(paragraphRange:atByteSampleOffset:)

func NewSpeechSynthesisMarkerWithPhonemeStringAtByteSampleOffset 

func NewSpeechSynthesisMarkerWithPhonemeStringAtByteSampleOffset(phoneme string, byteSampleOffset int) AVSpeechSynthesisMarker

Creates a phoneme marker with a range of the phoneme and offset into the audio buffer.

phoneme: A string that represents a distinct sound.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(phonemeString:atByteSampleOffset:)

func NewSpeechSynthesisMarkerWithSentenceRangeAtByteSampleOffset 

func NewSpeechSynthesisMarkerWithSentenceRangeAtByteSampleOffset(range_ foundation.NSRange, byteSampleOffset int) AVSpeechSynthesisMarker

Creates a sentence marker with a range of the sentence and offset into the audio buffer.

range: The location and length of the word.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(sentenceRange:atByteSampleOffset:)

func NewSpeechSynthesisMarkerWithWordRangeAtByteSampleOffset 

func NewSpeechSynthesisMarkerWithWordRangeAtByteSampleOffset(range_ foundation.NSRange, byteSampleOffset int) AVSpeechSynthesisMarker

Creates a word marker with a range of the word and offset into the audio buffer.

range: The location and length of the word.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(wordRange:atByteSampleOffset:)

func (AVSpeechSynthesisMarker) Autorelease 

func (s AVSpeechSynthesisMarker) Autorelease() AVSpeechSynthesisMarker

Autorelease adds the receiver to the current autorelease pool.

func (AVSpeechSynthesisMarker) BookmarkName 

func (s AVSpeechSynthesisMarker) BookmarkName() string

A string that represents the name of a bookmark.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/bookmarkName

func (AVSpeechSynthesisMarker) ByteSampleOffset 

func (s AVSpeechSynthesisMarker) ByteSampleOffset() uint

The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/byteSampleOffset

func (AVSpeechSynthesisMarker) EncodeWithCoder 

func (s AVSpeechSynthesisMarker) EncodeWithCoder(coder foundation.INSCoder)

func (AVSpeechSynthesisMarker) Init 

func (s AVSpeechSynthesisMarker) Init() AVSpeechSynthesisMarker

Init initializes the instance.

func (AVSpeechSynthesisMarker) InitWithBookmarkNameAtByteSampleOffset 

func (s AVSpeechSynthesisMarker) InitWithBookmarkNameAtByteSampleOffset(mark string, byteSampleOffset int) AVSpeechSynthesisMarker

Creates a bookmark marker with a name and offset into the audio buffer.

mark: The name of the bookmark.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(bookmarkName:atByteSampleOffset:)

func (AVSpeechSynthesisMarker) InitWithMarkerTypeForTextRangeAtByteSampleOffset 

func (s AVSpeechSynthesisMarker) InitWithMarkerTypeForTextRangeAtByteSampleOffset(type_ AVSpeechSynthesisMarkerMark, range_ foundation.NSRange, byteSampleOffset uint) AVSpeechSynthesisMarker

Creates a marker with a type and location of the request’s text.

type: The type that describes the text.

range: The location and length of the request’s text.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(markerType:forTextRange:atByteSampleOffset:)

func (AVSpeechSynthesisMarker) InitWithParagraphRangeAtByteSampleOffset 

func (s AVSpeechSynthesisMarker) InitWithParagraphRangeAtByteSampleOffset(range_ foundation.NSRange, byteSampleOffset int) AVSpeechSynthesisMarker

Creates a paragraph marker with a range of the paragraph and offset into the audio buffer.

range: The location and length of the paragraph.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(paragraphRange:atByteSampleOffset:)

func (AVSpeechSynthesisMarker) InitWithPhonemeStringAtByteSampleOffset 

func (s AVSpeechSynthesisMarker) InitWithPhonemeStringAtByteSampleOffset(phoneme string, byteSampleOffset int) AVSpeechSynthesisMarker

Creates a phoneme marker with a range of the phoneme and offset into the audio buffer.

phoneme: A string that represents a distinct sound.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(phonemeString:atByteSampleOffset:)

func (AVSpeechSynthesisMarker) InitWithSentenceRangeAtByteSampleOffset 

func (s AVSpeechSynthesisMarker) InitWithSentenceRangeAtByteSampleOffset(range_ foundation.NSRange, byteSampleOffset int) AVSpeechSynthesisMarker

Creates a sentence marker with a range of the sentence and offset into the audio buffer.

range: The location and length of the word.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(sentenceRange:atByteSampleOffset:)

func (AVSpeechSynthesisMarker) InitWithWordRangeAtByteSampleOffset 

func (s AVSpeechSynthesisMarker) InitWithWordRangeAtByteSampleOffset(range_ foundation.NSRange, byteSampleOffset int) AVSpeechSynthesisMarker

Creates a word marker with a range of the word and offset into the audio buffer.

range: The location and length of the word.

byteSampleOffset: The byte offset into the audio buffer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/init(wordRange:atByteSampleOffset:)

func (AVSpeechSynthesisMarker) Mark 

func (s AVSpeechSynthesisMarker) Mark() AVSpeechSynthesisMarkerMark

The type that describes the text.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/mark-swift.property

func (AVSpeechSynthesisMarker) Phoneme 

func (s AVSpeechSynthesisMarker) Phoneme() string

A string that represents a distinct sound.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/phoneme

func (AVSpeechSynthesisMarker) SetBookmarkName 

func (s AVSpeechSynthesisMarker) SetBookmarkName(value string)

func (AVSpeechSynthesisMarker) SetByteSampleOffset 

func (s AVSpeechSynthesisMarker) SetByteSampleOffset(value uint)

func (AVSpeechSynthesisMarker) SetMark 

func (s AVSpeechSynthesisMarker) SetMark(value AVSpeechSynthesisMarkerMark)

func (AVSpeechSynthesisMarker) SetPhoneme 

func (s AVSpeechSynthesisMarker) SetPhoneme(value string)

func (AVSpeechSynthesisMarker) SetSpeechSynthesisOutputMetadataBlock 

func (s AVSpeechSynthesisMarker) SetSpeechSynthesisOutputMetadataBlock(value AVSpeechSynthesisProviderOutputBlock)

func (AVSpeechSynthesisMarker) SetTextRange 

func (s AVSpeechSynthesisMarker) SetTextRange(value foundation.NSRange)

func (AVSpeechSynthesisMarker) SpeechSynthesisOutputMetadataBlock 

func (s AVSpeechSynthesisMarker) SpeechSynthesisOutputMetadataBlock() AVSpeechSynthesisProviderOutputBlock

A block that subclasses use to send marker information to the host.

See: https://developer.apple.com/documentation/avfaudio/avspeechsynthesisprovideraudiounit/speechsynthesisoutputmetadatablock

func (AVSpeechSynthesisMarker) TextRange 

func (s AVSpeechSynthesisMarker) TextRange() foundation.NSRange

The location and length of the request’s text.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/textRange

type AVSpeechSynthesisMarkerClass 

type AVSpeechSynthesisMarkerClass struct {
	// contains filtered or unexported fields
}

func GetAVSpeechSynthesisMarkerClass 

func GetAVSpeechSynthesisMarkerClass() AVSpeechSynthesisMarkerClass

GetAVSpeechSynthesisMarkerClass returns the class object for AVSpeechSynthesisMarker.

func (AVSpeechSynthesisMarkerClass) Alloc 

func (ac AVSpeechSynthesisMarkerClass) Alloc() AVSpeechSynthesisMarker

Alloc allocates memory for a new instance of the class.

func (AVSpeechSynthesisMarkerClass) Class 

func (ac AVSpeechSynthesisMarkerClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVSpeechSynthesisMarkerMark 

type AVSpeechSynthesisMarkerMark int

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker/Mark-swift.enum 

const (
	// AVSpeechSynthesisMarkerMarkBookmark: A Speech Synthesis Markup Language (SSML) mark tag.
	AVSpeechSynthesisMarkerMarkBookmark AVSpeechSynthesisMarkerMark = 4
	// AVSpeechSynthesisMarkerMarkParagraph: A type of text that represents a paragraph.
	AVSpeechSynthesisMarkerMarkParagraph AVSpeechSynthesisMarkerMark = 3
	// AVSpeechSynthesisMarkerMarkPhoneme: A type of text that represents a phoneme.
	AVSpeechSynthesisMarkerMarkPhoneme AVSpeechSynthesisMarkerMark = 0
	// AVSpeechSynthesisMarkerMarkSentence: A type of text that represents a sentence.
	AVSpeechSynthesisMarkerMarkSentence AVSpeechSynthesisMarkerMark = 2
	// AVSpeechSynthesisMarkerMarkWord: A type of text that represents a word.
	AVSpeechSynthesisMarkerMarkWord AVSpeechSynthesisMarkerMark = 1
)

func (AVSpeechSynthesisMarkerMark) String 

func (e AVSpeechSynthesisMarkerMark) String() string

type AVSpeechSynthesisPersonalVoiceAuthorizationStatus 

type AVSpeechSynthesisPersonalVoiceAuthorizationStatus int

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/PersonalVoiceAuthorizationStatus-swift.enum 

const (
	// AVSpeechSynthesisPersonalVoiceAuthorizationStatusAuthorized: The user granted your app’s request to use personal voices.
	AVSpeechSynthesisPersonalVoiceAuthorizationStatusAuthorized AVSpeechSynthesisPersonalVoiceAuthorizationStatus = 3
	// AVSpeechSynthesisPersonalVoiceAuthorizationStatusDenied: The user denied your app’s request to use personal voices.
	AVSpeechSynthesisPersonalVoiceAuthorizationStatusDenied AVSpeechSynthesisPersonalVoiceAuthorizationStatus = 1
	// AVSpeechSynthesisPersonalVoiceAuthorizationStatusNotDetermined: The app hasn’t requested authorization to use personal voices.
	AVSpeechSynthesisPersonalVoiceAuthorizationStatusNotDetermined AVSpeechSynthesisPersonalVoiceAuthorizationStatus = 0
	// AVSpeechSynthesisPersonalVoiceAuthorizationStatusUnsupported: The device doesn’t support personal voices.
	AVSpeechSynthesisPersonalVoiceAuthorizationStatusUnsupported AVSpeechSynthesisPersonalVoiceAuthorizationStatus = 2
)

func (AVSpeechSynthesisPersonalVoiceAuthorizationStatus) String 

func (e AVSpeechSynthesisPersonalVoiceAuthorizationStatus) String() string

type AVSpeechSynthesisPersonalVoiceAuthorizationStatusHandler 

type AVSpeechSynthesisPersonalVoiceAuthorizationStatusHandler = func(AVSpeechSynthesisPersonalVoiceAuthorizationStatus)

AVSpeechSynthesisPersonalVoiceAuthorizationStatusHandler handles A completion handler that the system calls after the user responds to a request to authorize use of personal voices, which receives the authorization status as an argument.

Used by:

  • [AVSpeechSynthesizer.RequestPersonalVoiceAuthorizationWithCompletionHandler]

type AVSpeechSynthesisProviderAudioUnit 

type AVSpeechSynthesisProviderAudioUnit struct {
	objectivec.Object
}

An object that generates speech from text.

Overview

Use a speech synthesizer audio unit to generate audio buffers that contain speech for a given voice and speech markup. The audio unit receives an AVSpeechSynthesisProviderRequest as input, and extracts audio buffers through the render block.

Use AVSpeechSynthesisProviderAudioUnit.SpeechSynthesisOutputMetadataBlock to provide metadata as an array of AVSpeechSynthesisMarker.

The system scans and loads voices for audio unit extensions of this type, and the voices it provides are available for use in AVSpeechSynthesizer and accessibility technologies like VoiceOver and Speak Screen.

Rendering speech

Supplying metadata

Getting and setting voices

Cancelling a request

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderAudioUnit

func AVSpeechSynthesisProviderAudioUnitFromID 

func AVSpeechSynthesisProviderAudioUnitFromID(id objc.ID) AVSpeechSynthesisProviderAudioUnit

AVSpeechSynthesisProviderAudioUnitFromID constructs a AVSpeechSynthesisProviderAudioUnit from an objc.ID.

An object that generates speech from text.

func NewAVSpeechSynthesisProviderAudioUnit 

func NewAVSpeechSynthesisProviderAudioUnit() AVSpeechSynthesisProviderAudioUnit

NewAVSpeechSynthesisProviderAudioUnit creates a new AVSpeechSynthesisProviderAudioUnit instance.

func (AVSpeechSynthesisProviderAudioUnit) Autorelease 

func (s AVSpeechSynthesisProviderAudioUnit) Autorelease() AVSpeechSynthesisProviderAudioUnit

Autorelease adds the receiver to the current autorelease pool.

func (AVSpeechSynthesisProviderAudioUnit) CancelSpeechRequest 

func (s AVSpeechSynthesisProviderAudioUnit) CancelSpeechRequest()

Informs the audio unit to discard the speech request.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderAudioUnit/cancelSpeechRequest()

func (AVSpeechSynthesisProviderAudioUnit) Init 

func (s AVSpeechSynthesisProviderAudioUnit) Init() AVSpeechSynthesisProviderAudioUnit

Init initializes the instance.

func (AVSpeechSynthesisProviderAudioUnit) SetSpeechSynthesisOutputMetadataBlock 

func (s AVSpeechSynthesisProviderAudioUnit) SetSpeechSynthesisOutputMetadataBlock(value AVSpeechSynthesisProviderOutputBlock)

func (AVSpeechSynthesisProviderAudioUnit) SetSpeechVoices 

func (s AVSpeechSynthesisProviderAudioUnit) SetSpeechVoices(value []AVSpeechSynthesisProviderVoice)

func (AVSpeechSynthesisProviderAudioUnit) SpeechSynthesisOutputMetadataBlock 

func (s AVSpeechSynthesisProviderAudioUnit) SpeechSynthesisOutputMetadataBlock() AVSpeechSynthesisProviderOutputBlock

A block that subclasses use to send marker information to the host.

Discussion

A host sets this block to retrieve metadata for a request.

A synthesizer calls this method when it produces data relevant to the audio buffers it’s sending back to a host. In some cases, the system may delay speech output until it delivers these markers. For example, word highlighting depends on marker data from synthesizers to time what word to highlight. The array of markers can reference audio buffers that the system delivers at a later time.

There may be cases where a subclass doesn’t have marker data until it completes extra audio processing. If marker data changes, this block replaces that audio buffer range’s marker data.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderAudioUnit/speechSynthesisOutputMetadataBlock

func (AVSpeechSynthesisProviderAudioUnit) SpeechVoices 

func (s AVSpeechSynthesisProviderAudioUnit) SpeechVoices() []AVSpeechSynthesisProviderVoice

A list of voices the audio unit provides to the system.

Discussion

The list of voices that a user selects through Settings. Speech synthesizer audio unit extensions must provide this list. Override the getter to perform complex fetches that provide a dynamic list of voices.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderAudioUnit/speechVoices

func (AVSpeechSynthesisProviderAudioUnit) SynthesizeSpeechRequest 

func (s AVSpeechSynthesisProviderAudioUnit) SynthesizeSpeechRequest(speechRequest IAVSpeechSynthesisProviderRequest)

Sets the text to synthesize and the voice to use.

speechRequest: A speech request to synthesize.

Discussion

When the synthesizer finishes generating audio buffers for the speech request, use AUInternalRenderBlock to report offlineUnitRenderAction_Complete.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderAudioUnit/synthesizeSpeechRequest(_:)

type AVSpeechSynthesisProviderAudioUnitClass 

type AVSpeechSynthesisProviderAudioUnitClass struct {
	// contains filtered or unexported fields
}

func GetAVSpeechSynthesisProviderAudioUnitClass 

func GetAVSpeechSynthesisProviderAudioUnitClass() AVSpeechSynthesisProviderAudioUnitClass

GetAVSpeechSynthesisProviderAudioUnitClass returns the class object for AVSpeechSynthesisProviderAudioUnit.

func (AVSpeechSynthesisProviderAudioUnitClass) Alloc 

func (ac AVSpeechSynthesisProviderAudioUnitClass) Alloc() AVSpeechSynthesisProviderAudioUnit

Alloc allocates memory for a new instance of the class.

func (AVSpeechSynthesisProviderAudioUnitClass) Class 

func (ac AVSpeechSynthesisProviderAudioUnitClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVSpeechSynthesisProviderOutputBlock 

type AVSpeechSynthesisProviderOutputBlock = func([]AVSpeechSynthesisMarker, AVSpeechSynthesisProviderRequest)

AVSpeechSynthesisProviderOutputBlock is a type that represents the method for sending marker information to the host.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderOutputBlock

type AVSpeechSynthesisProviderRequest 

type AVSpeechSynthesisProviderRequest struct {
	objectivec.Object
}

An object that represents the text to synthesize and the voice to use.

Creating a request

Inspecting a request

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderRequest

func AVSpeechSynthesisProviderRequestFromID 

func AVSpeechSynthesisProviderRequestFromID(id objc.ID) AVSpeechSynthesisProviderRequest

AVSpeechSynthesisProviderRequestFromID constructs a AVSpeechSynthesisProviderRequest from an objc.ID.

An object that represents the text to synthesize and the voice to use.

func NewAVSpeechSynthesisProviderRequest 

func NewAVSpeechSynthesisProviderRequest() AVSpeechSynthesisProviderRequest

NewAVSpeechSynthesisProviderRequest creates a new AVSpeechSynthesisProviderRequest instance.

func NewSpeechSynthesisProviderRequestWithSSMLRepresentationVoice 

func NewSpeechSynthesisProviderRequestWithSSMLRepresentationVoice(text string, voice IAVSpeechSynthesisProviderVoice) AVSpeechSynthesisProviderRequest

Creates a request with a voice and a description.

text: The description of the text to synthesize.

voice: The voice to use in the speech request.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderRequest/init(ssmlRepresentation:voice:)

func (AVSpeechSynthesisProviderRequest) Autorelease 

func (s AVSpeechSynthesisProviderRequest) Autorelease() AVSpeechSynthesisProviderRequest

Autorelease adds the receiver to the current autorelease pool.

func (AVSpeechSynthesisProviderRequest) EncodeWithCoder 

func (s AVSpeechSynthesisProviderRequest) EncodeWithCoder(coder foundation.INSCoder)

func (AVSpeechSynthesisProviderRequest) Init 

func (s AVSpeechSynthesisProviderRequest) Init() AVSpeechSynthesisProviderRequest

Init initializes the instance.

func (AVSpeechSynthesisProviderRequest) InitWithSSMLRepresentationVoice 

func (s AVSpeechSynthesisProviderRequest) InitWithSSMLRepresentationVoice(text string, voice IAVSpeechSynthesisProviderVoice) AVSpeechSynthesisProviderRequest

Creates a request with a voice and a description.

text: The description of the text to synthesize.

voice: The voice to use in the speech request.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderRequest/init(ssmlRepresentation:voice:)

func (AVSpeechSynthesisProviderRequest) SsmlRepresentation 

func (s AVSpeechSynthesisProviderRequest) SsmlRepresentation() string

The description of the text to synthesize.

Discussion

The Speech Synthesis Markup Language describes the speech synthesis attributes for the customization of pitch, rate, intonation, and more.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderRequest/ssmlRepresentation

func (AVSpeechSynthesisProviderRequest) Voice 

func (s AVSpeechSynthesisProviderRequest) Voice() IAVSpeechSynthesisProviderVoice

The voice to use in the speech request.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderRequest/voice

type AVSpeechSynthesisProviderRequestClass 

type AVSpeechSynthesisProviderRequestClass struct {
	// contains filtered or unexported fields
}

func GetAVSpeechSynthesisProviderRequestClass 

func GetAVSpeechSynthesisProviderRequestClass() AVSpeechSynthesisProviderRequestClass

GetAVSpeechSynthesisProviderRequestClass returns the class object for AVSpeechSynthesisProviderRequest.

func (AVSpeechSynthesisProviderRequestClass) Alloc 

func (ac AVSpeechSynthesisProviderRequestClass) Alloc() AVSpeechSynthesisProviderRequest

Alloc allocates memory for a new instance of the class.

func (AVSpeechSynthesisProviderRequestClass) Class 

func (ac AVSpeechSynthesisProviderRequestClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

type AVSpeechSynthesisProviderVoice 

type AVSpeechSynthesisProviderVoice struct {
	objectivec.Object
}

An object that represents a voice that an audio unit provides to its host.

Overview

This is a voice that an AVSpeechSynthesisProviderAudioUnit provides to the system, distinct from AVSpeechSynthesisVoice. Use AVSpeechSynthesisProviderVoice.SpeechVoices to access the underlying AVSpeechSynthesisVoice in the voice quality AVSpeechSynthesisVoiceQualityEnhanced.

Creating a voice

Inspecting a voice

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice

func AVSpeechSynthesisProviderVoiceFromID 

func AVSpeechSynthesisProviderVoiceFromID(id objc.ID) AVSpeechSynthesisProviderVoice

AVSpeechSynthesisProviderVoiceFromID constructs a AVSpeechSynthesisProviderVoice from an objc.ID.

An object that represents a voice that an audio unit provides to its host.

func NewAVSpeechSynthesisProviderVoice 

func NewAVSpeechSynthesisProviderVoice() AVSpeechSynthesisProviderVoice

NewAVSpeechSynthesisProviderVoice creates a new AVSpeechSynthesisProviderVoice instance.

func NewSpeechSynthesisProviderVoiceWithNameIdentifierPrimaryLanguagesSupportedLanguages 

func NewSpeechSynthesisProviderVoiceWithNameIdentifierPrimaryLanguagesSupportedLanguages(name string, identifier string, primaryLanguages []string, supportedLanguages []string) AVSpeechSynthesisProviderVoice

Creates a voice with a name, an identifier, and language information.

name: The localized name of the voice.

identifier: The unique identifier for the voice.

primaryLanguages: A list of BCP 47 codes that identify the primary languages.

supportedLanguages: A list of BCP 47 codes that identify the languages the voice supports.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/init(name:identifier:primaryLanguages:supportedLanguages:)

func (AVSpeechSynthesisProviderVoice) Age 

func (s AVSpeechSynthesisProviderVoice) Age() int

The age of the voice, in years.

Discussion

The system treats this value as a personality trait and defaults to `0`.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/age

func (AVSpeechSynthesisProviderVoice) Autorelease 

func (s AVSpeechSynthesisProviderVoice) Autorelease() AVSpeechSynthesisProviderVoice

Autorelease adds the receiver to the current autorelease pool.

func (AVSpeechSynthesisProviderVoice) EncodeWithCoder 

func (s AVSpeechSynthesisProviderVoice) EncodeWithCoder(coder foundation.INSCoder)

func (AVSpeechSynthesisProviderVoice) Gender 

func (s AVSpeechSynthesisProviderVoice) Gender() AVSpeechSynthesisVoiceGender

The gender of the voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/gender

func (AVSpeechSynthesisProviderVoice) Identifier 

func (s AVSpeechSynthesisProviderVoice) Identifier() string

The unique identifier for the voice.

Discussion

Use reverse domain notation to format the identifier. The behavior is undefined unless all voices within an extension have a unique identifier.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/identifier

func (AVSpeechSynthesisProviderVoice) Init 

func (s AVSpeechSynthesisProviderVoice) Init() AVSpeechSynthesisProviderVoice

Init initializes the instance.

func (AVSpeechSynthesisProviderVoice) InitWithNameIdentifierPrimaryLanguagesSupportedLanguages 

func (s AVSpeechSynthesisProviderVoice) InitWithNameIdentifierPrimaryLanguagesSupportedLanguages(name string, identifier string, primaryLanguages []string, supportedLanguages []string) AVSpeechSynthesisProviderVoice

Creates a voice with a name, an identifier, and language information.

name: The localized name of the voice.

identifier: The unique identifier for the voice.

primaryLanguages: A list of BCP 47 codes that identify the primary languages.

supportedLanguages: A list of BCP 47 codes that identify the languages the voice supports.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/init(name:identifier:primaryLanguages:supportedLanguages:)

func (AVSpeechSynthesisProviderVoice) Name 

func (s AVSpeechSynthesisProviderVoice) Name() string

The localized name of the voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/name

func (AVSpeechSynthesisProviderVoice) PrimaryLanguages 

func (s AVSpeechSynthesisProviderVoice) PrimaryLanguages() []string

A list of BCP 47 codes that identify the languages the synthesizer uses.

Discussion

These languages are what a voice primarily supports. For example, if the primary language is `zh-CN —` with no additional [SupportedLanguages] — the system may switch voices to speak a phrase that contains other languages. Changing voices depends on user preferences and what accessibility feature is using the voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/primaryLanguages

func (AVSpeechSynthesisProviderVoice) SetAge 

func (s AVSpeechSynthesisProviderVoice) SetAge(value int)

func (AVSpeechSynthesisProviderVoice) SetGender 

func (s AVSpeechSynthesisProviderVoice) SetGender(value AVSpeechSynthesisVoiceGender)

func (AVSpeechSynthesisProviderVoice) SetSpeechVoices 

func (s AVSpeechSynthesisProviderVoice) SetSpeechVoices(value IAVSpeechSynthesisProviderVoice)

func (AVSpeechSynthesisProviderVoice) SetVersion 

func (s AVSpeechSynthesisProviderVoice) SetVersion(value string)

func (AVSpeechSynthesisProviderVoice) SetVoiceSize 

func (s AVSpeechSynthesisProviderVoice) SetVoiceSize(value int64)

func (AVSpeechSynthesisProviderVoice) SpeechVoices 

func (s AVSpeechSynthesisProviderVoice) SpeechVoices() IAVSpeechSynthesisProviderVoice

A list of voices the audio unit provides to the system.

See: https://developer.apple.com/documentation/avfaudio/avspeechsynthesisprovideraudiounit/speechvoices

func (AVSpeechSynthesisProviderVoice) SupportedLanguages 

func (s AVSpeechSynthesisProviderVoice) SupportedLanguages() []string

A list of BCP 47 codes that identify the languages a voice supports.

Discussion

These languages are what a voice supports — when given a multi-language phrase — without the need to switch voice. For example, if the primary language is `zh-CN`, and this value contains `zh-CN` and `en-US`, a synthesizer that receives a phrase with both languages would speak the entire phrase.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/supportedLanguages

func (AVSpeechSynthesisProviderVoice) Version 

func (s AVSpeechSynthesisProviderVoice) Version() string

The version of the voice.

Discussion

This value is for your own tracking and doesn’t impact the behavior of the system.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/version

func (AVSpeechSynthesisProviderVoice) VoiceSize 

func (s AVSpeechSynthesisProviderVoice) VoiceSize() int64

The size of the voice package on disk, in bytes.

Discussion

This value defaults to `0`.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/voiceSize

type AVSpeechSynthesisProviderVoiceClass 

type AVSpeechSynthesisProviderVoiceClass struct {
	// contains filtered or unexported fields
}

func GetAVSpeechSynthesisProviderVoiceClass 

func GetAVSpeechSynthesisProviderVoiceClass() AVSpeechSynthesisProviderVoiceClass

GetAVSpeechSynthesisProviderVoiceClass returns the class object for AVSpeechSynthesisProviderVoice.

func (AVSpeechSynthesisProviderVoiceClass) Alloc 

func (ac AVSpeechSynthesisProviderVoiceClass) Alloc() AVSpeechSynthesisProviderVoice

Alloc allocates memory for a new instance of the class.

func (AVSpeechSynthesisProviderVoiceClass) Class 

func (ac AVSpeechSynthesisProviderVoiceClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

func (AVSpeechSynthesisProviderVoiceClass) UpdateSpeechVoices 

func (_AVSpeechSynthesisProviderVoiceClass AVSpeechSynthesisProviderVoiceClass) UpdateSpeechVoices()

Updates the voices your app provides to the system.

Discussion

Use this method to inform the system when you add or remove voices.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice/updateSpeechVoices()

type AVSpeechSynthesisVoice 

type AVSpeechSynthesisVoice struct {
	objectivec.Object
}

A distinct voice for use in speech synthesis.

Overview

The primary factors that distinguish a voice in speech synthesis are language, locale, and quality. Create an instance of AVSpeechSynthesisVoice to select a voice that’s appropriate for the text and the language, and set it as the value of the AVSpeechSynthesisVoice.Voice property on an AVSpeechUtterance instance. The voice may optionally reflect a local variant of the language, such as Australian or South African English. For a complete list of supported languages, see Languages Supported by VoiceOver.

Obtaining voices

Inspecting voices

Working with language codes

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice

func AVSpeechSynthesisVoiceFromID 

func AVSpeechSynthesisVoiceFromID(id objc.ID) AVSpeechSynthesisVoice

AVSpeechSynthesisVoiceFromID constructs a AVSpeechSynthesisVoice from an objc.ID.

A distinct voice for use in speech synthesis.

func NewAVSpeechSynthesisVoice 

func NewAVSpeechSynthesisVoice() AVSpeechSynthesisVoice

NewAVSpeechSynthesisVoice creates a new AVSpeechSynthesisVoice instance.

func NewSpeechSynthesisVoiceWithIdentifier 

func NewSpeechSynthesisVoiceWithIdentifier(identifier string) AVSpeechSynthesisVoice

Retrieves a voice for the identifier you specify.

identifier: The unique identifier for a voice.

Return Value

A voice for the specified identifier if the identifier is valid and the voice is available on the device; otherwise, `nil`.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/init(identifier:)

func NewSpeechSynthesisVoiceWithLanguage 

func NewSpeechSynthesisVoiceWithLanguage(languageCode string) AVSpeechSynthesisVoice

Retrieves a voice for the BCP 47 code language code you specify.

Return Value

A voice for the specified language and locale code if the code is valid; otherwise, `nil`.

Discussion

- languageCode: A BCP 47 code that identifies the language and locale for a voice.

Discussion

Pass `nil` for `languageCode` to receive the default voice for the system’s language and region.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/init(language:)

func (AVSpeechSynthesisVoice) AVSpeechSynthesisVoiceIdentifierAlex 

func (s AVSpeechSynthesisVoice) AVSpeechSynthesisVoiceIdentifierAlex() string

The voice that the system identifies as Alex.

See: https://developer.apple.com/documentation/avfaudio/avspeechsynthesisvoiceidentifieralex

func (AVSpeechSynthesisVoice) AudioFileSettings 

func (s AVSpeechSynthesisVoice) AudioFileSettings() foundation.INSDictionary

A dictionary that contains audio file settings.

Discussion

If you want to generate speech and save it as an audio file to share or play later, use this dictionary to create an AVAudioFile instance and pass it as the `settings` parameter.

You can determine the AVAudioCommonFormat and interleaved properties of a voice from this dictionary. The format of this dictionary matches the data that AVSpeechSynthesizerBufferCallback provides for the same voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/audioFileSettings

func (AVSpeechSynthesisVoice) Autorelease 

func (s AVSpeechSynthesisVoice) Autorelease() AVSpeechSynthesisVoice

Autorelease adds the receiver to the current autorelease pool.

func (AVSpeechSynthesisVoice) EncodeWithCoder 

func (s AVSpeechSynthesisVoice) EncodeWithCoder(coder foundation.INSCoder)

func (AVSpeechSynthesisVoice) Gender 

func (s AVSpeechSynthesisVoice) Gender() AVSpeechSynthesisVoiceGender

The gender for a voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/gender

func (AVSpeechSynthesisVoice) Identifier 

func (s AVSpeechSynthesisVoice) Identifier() string

The unique identifier of a voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/identifier

func (AVSpeechSynthesisVoice) Init 

func (s AVSpeechSynthesisVoice) Init() AVSpeechSynthesisVoice

Init initializes the instance.

func (AVSpeechSynthesisVoice) Language 

func (s AVSpeechSynthesisVoice) Language() string

A BCP 47 code that contains the voice’s language and locale.

Discussion

The language of a voice controls the conversion of text to spoken phonemes. For best results, ensure that the language of an utterance’s text matches the voice for the utterance. The locale of a voice reflects regional variations in pronunciation or accent. For example, a voice with a language code of `en-US` speaks English text with a North American accent, and a language code of `en-AU` speaks English text with an Australian accent.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/language

func (AVSpeechSynthesisVoice) Name 

func (s AVSpeechSynthesisVoice) Name() string

The name of a voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/name

func (AVSpeechSynthesisVoice) Quality 

func (s AVSpeechSynthesisVoice) Quality() AVSpeechSynthesisVoiceQuality

The speech quality of a voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/quality

func (AVSpeechSynthesisVoice) SetVoice 

func (s AVSpeechSynthesisVoice) SetVoice(value IAVSpeechSynthesisVoice)

func (AVSpeechSynthesisVoice) Voice 

func (s AVSpeechSynthesisVoice) Voice() IAVSpeechSynthesisVoice

The voice the speech synthesizer uses when speaking the utterance.

See: https://developer.apple.com/documentation/avfaudio/avspeechutterance/voice

func (AVSpeechSynthesisVoice) VoiceTraits 

func (s AVSpeechSynthesisVoice) VoiceTraits() AVSpeechSynthesisVoiceTraits

The traits of a voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/voiceTraits

type AVSpeechSynthesisVoiceClass 

type AVSpeechSynthesisVoiceClass struct {
	// contains filtered or unexported fields
}

func GetAVSpeechSynthesisVoiceClass 

func GetAVSpeechSynthesisVoiceClass() AVSpeechSynthesisVoiceClass

GetAVSpeechSynthesisVoiceClass returns the class object for AVSpeechSynthesisVoice.

func (AVSpeechSynthesisVoiceClass) Alloc 

func (ac AVSpeechSynthesisVoiceClass) Alloc() AVSpeechSynthesisVoice

Alloc allocates memory for a new instance of the class.

func (AVSpeechSynthesisVoiceClass) Class 

func (ac AVSpeechSynthesisVoiceClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

func (AVSpeechSynthesisVoiceClass) CurrentLanguageCode 

func (_AVSpeechSynthesisVoiceClass AVSpeechSynthesisVoiceClass) CurrentLanguageCode() string

Returns the language and locale code for the user’s current locale.

Return Value

A string that contains the BCP 47 language and locale code for the user’s current locale.

Discussion

This code reflects the user’s language and region preferences in the Settings app.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/currentLanguageCode()

func (AVSpeechSynthesisVoiceClass) SpeechVoices 

func (_AVSpeechSynthesisVoiceClass AVSpeechSynthesisVoiceClass) SpeechVoices() []AVSpeechSynthesisVoice

Retrieves all available voices on the device.

Return Value

An array of voices.

Discussion

Use the [Language] property to identify each voice by its language and locale.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/speechVoices()

type AVSpeechSynthesisVoiceGender 

type AVSpeechSynthesisVoiceGender int

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoiceGender 

const (
	// AVSpeechSynthesisVoiceGenderFemale: The female voice option.
	AVSpeechSynthesisVoiceGenderFemale AVSpeechSynthesisVoiceGender = 2
	// AVSpeechSynthesisVoiceGenderMale: The male voice option.
	AVSpeechSynthesisVoiceGenderMale AVSpeechSynthesisVoiceGender = 1
	// AVSpeechSynthesisVoiceGenderUnspecified: The nonspecific gender option.
	AVSpeechSynthesisVoiceGenderUnspecified AVSpeechSynthesisVoiceGender = 0
)

func (AVSpeechSynthesisVoiceGender) String 

func (e AVSpeechSynthesisVoiceGender) String() string

type AVSpeechSynthesisVoiceQuality 

type AVSpeechSynthesisVoiceQuality int

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoiceQuality 

const (
	// AVSpeechSynthesisVoiceQualityDefault: A basic quality voice that’s  available on the device by default.
	AVSpeechSynthesisVoiceQualityDefault AVSpeechSynthesisVoiceQuality = 1
	// AVSpeechSynthesisVoiceQualityEnhanced: An enhanced quality voice that you must download to use.
	AVSpeechSynthesisVoiceQualityEnhanced AVSpeechSynthesisVoiceQuality = 2
	// AVSpeechSynthesisVoiceQualityPremium: A premium quality voice that you must download to use.
	AVSpeechSynthesisVoiceQualityPremium AVSpeechSynthesisVoiceQuality = 3
)

func (AVSpeechSynthesisVoiceQuality) String 

func (e AVSpeechSynthesisVoiceQuality) String() string

type AVSpeechSynthesisVoiceTraits 

type AVSpeechSynthesisVoiceTraits uint

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice/Traits 

const (
	// AVSpeechSynthesisVoiceTraitIsNoveltyVoice: The trait that indicates a voice is a novelty voice.
	AVSpeechSynthesisVoiceTraitIsNoveltyVoice AVSpeechSynthesisVoiceTraits = 1
	// AVSpeechSynthesisVoiceTraitIsPersonalVoice: The trait that indicates a voice is a personal voice.
	AVSpeechSynthesisVoiceTraitIsPersonalVoice AVSpeechSynthesisVoiceTraits = 2
	// AVSpeechSynthesisVoiceTraitNone: The trait that indicates a voice is a regular voice.
	AVSpeechSynthesisVoiceTraitNone AVSpeechSynthesisVoiceTraits = 0
)

func (AVSpeechSynthesisVoiceTraits) String 

func (e AVSpeechSynthesisVoiceTraits) String() string

type AVSpeechSynthesizer 

type AVSpeechSynthesizer struct {
	objectivec.Object
}

An object that produces synthesized speech from text utterances and enables monitoring or controlling of ongoing speech.

Overview

To speak some text, create an AVSpeechUtterance instance that contains the text and pass it to AVSpeechSynthesizer.SpeakUtterance on a speech synthesizer instance. You can optionally also retrieve an AVSpeechSynthesisVoice and set it on the utterance’s AVSpeechSynthesizer.Voice property to have the speech synthesizer use that voice when speaking the utterance’s text.

The speech synthesizer maintains a queue of utterances that it speaks. If the synthesizer isn’t speaking, calling AVSpeechSynthesizer.SpeakUtterance begins speaking that utterance either immediately or after pausing for its AVSpeechSynthesizer.PreUtteranceDelay, if necessary. If the synthesizer is speaking, the synthesizer adds utterances to a queue and speaks them in the order it receives them.

After speech begins, you can use the synthesizer object to pause or stop speech. After pausing, you can resume the speech from its paused point or stop the speech entirely and remove all remaining utterances in the queue.

You can monitor the speech synthesizer by examining its AVSpeechSynthesizer.Speaking and AVSpeechSynthesizer.Paused properties, or by setting a delegate that conforms to AVSpeechSynthesizerDelegate. The delegate receives significant events as they occur during speech synthesis.

An AVSpeechSynthesizer also controls the route where the speech plays. For more information, see Directing speech output.

Controlling speech

Inspecting a speech synthesizer

Managing the delegate

Directing speech output

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer

func AVSpeechSynthesizerFromID 

func AVSpeechSynthesizerFromID(id objc.ID) AVSpeechSynthesizer

AVSpeechSynthesizerFromID constructs a AVSpeechSynthesizer from an objc.ID.

An object that produces synthesized speech from text utterances and enables monitoring or controlling of ongoing speech.

func NewAVSpeechSynthesizer 

func NewAVSpeechSynthesizer() AVSpeechSynthesizer

NewAVSpeechSynthesizer creates a new AVSpeechSynthesizer instance.

func (AVSpeechSynthesizer) Autorelease 

func (s AVSpeechSynthesizer) Autorelease() AVSpeechSynthesizer

Autorelease adds the receiver to the current autorelease pool.

func (AVSpeechSynthesizer) ContinueSpeaking 

func (s AVSpeechSynthesizer) ContinueSpeaking() bool

Resumes speech from its paused point.

Return Value

true if speech resumes; otherwise, false.

Discussion

This method only has an effect if the speech synthesizer is in a paused state.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/continueSpeaking()

func (AVSpeechSynthesizer) Delegate 

func (s AVSpeechSynthesizer) Delegate() AVSpeechSynthesizerDelegate

The delegate object for the speech synthesizer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/delegate

func (AVSpeechSynthesizer) Init 

func (s AVSpeechSynthesizer) Init() AVSpeechSynthesizer

Init initializes the instance.

func (AVSpeechSynthesizer) PauseSpeakingAtBoundary 

func (s AVSpeechSynthesizer) PauseSpeakingAtBoundary(boundary AVSpeechBoundary) bool

Pauses speech at the boundary you specify.

boundary: An enumeration that describes whether to pause speech immediately or only after the synthesizer finishes speaking the current word.

Return Value

true if speech pauses; otherwise, false.

Discussion

The `boundary` parameter also affects how the speech synthesizer resumes speaking text after a pause and call to [ContinueSpeaking]. If the boundary is AVSpeechBoundaryImmediate, speech resumes from the exact point where it pauses, even if that point occurs in the middle of speaking a word. If the boundary is AVSpeechBoundaryWord, speech resumes from the word that follows the last spoken word where it pauses.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/pauseSpeaking(at:)

func (AVSpeechSynthesizer) Paused 

func (s AVSpeechSynthesizer) Paused() bool

A Boolean value that indicates whether a speech synthesizer is in a paused state.

Discussion

If `true`, the speech synthesizer is in a paused state after beginning to speak an utterance; otherwise, `false`.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/isPaused

func (AVSpeechSynthesizer) PreUtteranceDelay 

func (s AVSpeechSynthesizer) PreUtteranceDelay() float64

The amount of time the speech synthesizer pauses before speaking the utterance.

See: https://developer.apple.com/documentation/avfaudio/avspeechutterance/preutterancedelay

func (AVSpeechSynthesizer) SetDelegate 

func (s AVSpeechSynthesizer) SetDelegate(value AVSpeechSynthesizerDelegate)

func (AVSpeechSynthesizer) SetPreUtteranceDelay 

func (s AVSpeechSynthesizer) SetPreUtteranceDelay(value float64)

func (AVSpeechSynthesizer) SetVoice 

func (s AVSpeechSynthesizer) SetVoice(value IAVSpeechSynthesisVoice)

func (AVSpeechSynthesizer) SpeakUtterance 

func (s AVSpeechSynthesizer) SpeakUtterance(utterance IAVSpeechUtterance)

Adds the utterance you specify to the speech synthesizer’s queue.

utterance: An AVSpeechUtterance instance that contains text to speak.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/speak(_:)

func (AVSpeechSynthesizer) Speaking 

func (s AVSpeechSynthesizer) Speaking() bool

A Boolean value that indicates whether the speech synthesizer is speaking or is in a paused state and has utterances to speak.

Discussion

If `true`, the synthesizer is speaking or is in a paused state with utterances in its queue. If `false`, the synthesizer isn’t speaking and it doesn’t have any utterances in its queue.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/isSpeaking

func (AVSpeechSynthesizer) StopSpeakingAtBoundary 

func (s AVSpeechSynthesizer) StopSpeakingAtBoundary(boundary AVSpeechBoundary) bool

Stops speech at the boundary you specify.

boundary: An enumeration that describes whether to stop speech immediately or only after the synthesizer finishes speaking the current word.

Return Value

true if speech stops; otherwise, false.

Discussion

Unlike pausing a speech synthesizer, which can resume after a pause, stopping the synthesizer immediately cancels speech and removes all unspoken utterances from the synthesizer’s queue.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/stopSpeaking(at:)

func (AVSpeechSynthesizer) Voice 

func (s AVSpeechSynthesizer) Voice() IAVSpeechSynthesisVoice

The voice the speech synthesizer uses when speaking the utterance.

See: https://developer.apple.com/documentation/avfaudio/avspeechutterance/voice

func (AVSpeechSynthesizer) WriteUtteranceToBufferCallback 

func (s AVSpeechSynthesizer) WriteUtteranceToBufferCallback(utterance IAVSpeechUtterance, bufferCallback AVSpeechSynthesizerBufferCallback)

Generates speech for the utterance and invokes the callback with the audio buffer.

utterance: The utterance for synthesizing speech.

bufferCallback: The system calls this closure with the generated audio buffer.

Discussion

Call this method to receive audio buffers to store or further process synthesized speech.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/write(_:toBufferCallback:)

func (AVSpeechSynthesizer) WriteUtteranceToBufferCallbackToMarkerCallback 

func (s AVSpeechSynthesizer) WriteUtteranceToBufferCallbackToMarkerCallback(utterance IAVSpeechUtterance, bufferCallback AVSpeechSynthesizerBufferCallback, markerCallback AVSpeechSynthesizerMarkerCallback)

Generates audio buffers and associated metadata for storage or further speech synthesis processing.

utterance: A utterance for a synthesizer to speak.

bufferCallback: A callback that the system invokes with the synthesized audio data.

markerCallback: A callback that the system invokes with marker information.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/write(_:toBufferCallback:toMarkerCallback:)

type AVSpeechSynthesizerBufferCallback 

type AVSpeechSynthesizerBufferCallback = func(AVAudioBuffer)

AVSpeechSynthesizerBufferCallback is a type that defines a callback that receives a buffer of generated speech.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/BufferCallback

type AVSpeechSynthesizerClass 

type AVSpeechSynthesizerClass struct {
	// contains filtered or unexported fields
}

func GetAVSpeechSynthesizerClass 

func GetAVSpeechSynthesizerClass() AVSpeechSynthesizerClass

GetAVSpeechSynthesizerClass returns the class object for AVSpeechSynthesizer.

func (AVSpeechSynthesizerClass) Alloc 

func (ac AVSpeechSynthesizerClass) Alloc() AVSpeechSynthesizer

Alloc allocates memory for a new instance of the class.

func (AVSpeechSynthesizerClass) AvailableVoicesDidChangeNotification 

func (_AVSpeechSynthesizerClass AVSpeechSynthesizerClass) AvailableVoicesDidChangeNotification() foundation.NSString

A notification that indicates a change in available voices for speech synthesis.

See: https://developer.apple.com/documentation/avfaudio/avspeechsynthesizer/availablevoicesdidchangenotification

func (AVSpeechSynthesizerClass) Class 

func (ac AVSpeechSynthesizerClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

func (AVSpeechSynthesizerClass) PersonalVoiceAuthorizationStatus 

func (_AVSpeechSynthesizerClass AVSpeechSynthesizerClass) PersonalVoiceAuthorizationStatus() AVSpeechSynthesisPersonalVoiceAuthorizationStatus

Your app’s authorization to use personal voices.

Discussion

The user can grant or deny your app’s request to use personal voices when they’re initially prompted, and change the authorization in the Settings app. Additionally, the framework denies the request if the device doesn’t support using personal voices.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/personalVoiceAuthorizationStatus-swift.type.property

func (AVSpeechSynthesizerClass) RequestPersonalVoiceAuthorization 

func (sc AVSpeechSynthesizerClass) RequestPersonalVoiceAuthorization(ctx context.Context) (AVSpeechSynthesisPersonalVoiceAuthorizationStatus, error)

RequestPersonalVoiceAuthorization is a synchronous wrapper around [AVSpeechSynthesizer.RequestPersonalVoiceAuthorizationWithCompletionHandler]. It blocks until the completion handler fires or the context is cancelled.

func (AVSpeechSynthesizerClass) RequestPersonalVoiceAuthorizationWithCompletionHandler 

func (_AVSpeechSynthesizerClass AVSpeechSynthesizerClass) RequestPersonalVoiceAuthorizationWithCompletionHandler(handler AVSpeechSynthesisPersonalVoiceAuthorizationStatusHandler)

Prompts the user to authorize your app to use personal voices.

handler: A completion handler that the system calls after the user responds to a request to authorize use of personal voices, which receives the authorization status as an argument.

Discussion

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/requestPersonalVoiceAuthorization(completionHandler:)

type AVSpeechSynthesizerDelegate 

type AVSpeechSynthesizerDelegate interface {
	objectivec.IObject
}

A delegate protocol that contains optional methods you can implement to respond to events that occur during speech synthesis.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizerDelegate

type AVSpeechSynthesizerDelegateConfig 

type AVSpeechSynthesizerDelegateConfig struct {

	// Responding to speech synthesis events
	// SpeechSynthesizerWillSpeakRangeOfSpeechStringUtterance — Tells the delegate when the synthesizer is about to speak a portion of an utterance’s text.
	SpeechSynthesizerWillSpeakRangeOfSpeechStringUtterance func(synthesizer AVSpeechSynthesizer, characterRange foundation.NSRange, utterance AVSpeechUtterance)

	// Other Methods
	// SpeechSynthesizerDidStartSpeechUtterance — Tells the delegate when the synthesizer begins speaking an utterance.
	SpeechSynthesizerDidStartSpeechUtterance func(synthesizer AVSpeechSynthesizer, utterance AVSpeechUtterance)
	// SpeechSynthesizerWillSpeakMarkerUtterance — Tells the delegate when the synthesizer is about to speak a marker of an utterance’s text.
	SpeechSynthesizerWillSpeakMarkerUtterance func(synthesizer AVSpeechSynthesizer, marker AVSpeechSynthesisMarker, utterance AVSpeechUtterance)
	// SpeechSynthesizerDidPauseSpeechUtterance — Tells the delegate when the synthesizer pauses while speaking an utterance.
	SpeechSynthesizerDidPauseSpeechUtterance func(synthesizer AVSpeechSynthesizer, utterance AVSpeechUtterance)
	// SpeechSynthesizerDidContinueSpeechUtterance — Tells the delegate when the synthesizer resumes speaking an utterance after pausing.
	SpeechSynthesizerDidContinueSpeechUtterance func(synthesizer AVSpeechSynthesizer, utterance AVSpeechUtterance)
	// SpeechSynthesizerDidFinishSpeechUtterance — Tells the delegate when the synthesizer finishes speaking an utterance.
	SpeechSynthesizerDidFinishSpeechUtterance func(synthesizer AVSpeechSynthesizer, utterance AVSpeechUtterance)
	// SpeechSynthesizerDidCancelSpeechUtterance — Tells the delegate when the synthesizer cancels speaking an utterance.
	SpeechSynthesizerDidCancelSpeechUtterance func(synthesizer AVSpeechSynthesizer, utterance AVSpeechUtterance)
}

AVSpeechSynthesizerDelegateConfig holds optional typed callbacks for AVSpeechSynthesizerDelegate methods. Set non-nil fields to register the corresponding Objective-C delegate method. Methods with nil callbacks are not registered, so [NSObject.RespondsToSelector] returns false for them — matching the Objective-C delegate pattern exactly.

See Apple Documentation for protocol details.

type AVSpeechSynthesizerDelegateObject 

type AVSpeechSynthesizerDelegateObject struct {
	objectivec.Object
}

AVSpeechSynthesizerDelegateObject wraps an existing Objective-C object that conforms to the AVSpeechSynthesizerDelegate protocol.

func AVSpeechSynthesizerDelegateObjectFromID 

func AVSpeechSynthesizerDelegateObjectFromID(id objc.ID) AVSpeechSynthesizerDelegateObject

AVSpeechSynthesizerDelegateObjectFromID constructs a AVSpeechSynthesizerDelegateObject from an objc.ID. The object is determined to conform to the protocol at runtime.

func NewAVSpeechSynthesizerDelegate 

func NewAVSpeechSynthesizerDelegate(config AVSpeechSynthesizerDelegateConfig) AVSpeechSynthesizerDelegateObject

NewAVSpeechSynthesizerDelegate creates an Objective-C object implementing the AVSpeechSynthesizerDelegate protocol.

Each call registers a unique Objective-C class containing only the methods set in config. This means [NSObject.RespondsToSelector] works correctly for optional delegate methods — only non-nil callbacks are registered.

The returned AVSpeechSynthesizerDelegateObject satisfies the AVSpeechSynthesizerDelegate interface and can be passed directly to SetDelegate and similar methods.

See Apple Documentation for protocol details.

func (AVSpeechSynthesizerDelegateObject) BaseObject 

func (o AVSpeechSynthesizerDelegateObject) BaseObject() objectivec.Object

func (AVSpeechSynthesizerDelegateObject) SpeechSynthesizerDidCancelSpeechUtterance 

func (o AVSpeechSynthesizerDelegateObject) SpeechSynthesizerDidCancelSpeechUtterance(synthesizer IAVSpeechSynthesizer, utterance IAVSpeechUtterance)

Tells the delegate when the synthesizer cancels speaking an utterance.

synthesizer: The speech synthesizer that cancels speaking the utterance.

utterance: The utterance that the speech synthesizer cancels speaking.

Discussion

The system only calls this method if a speech synthesizer is speaking an utterance and the system calls its [StopSpeakingAtBoundary] method. The system doesn’t call this method if the synthesizer is in a delay between utterances when speech stops, and it doesn’t call it for unspoken utterances.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizerDelegate/speechSynthesizer(_:didCancel:)

func (AVSpeechSynthesizerDelegateObject) SpeechSynthesizerDidContinueSpeechUtterance 

func (o AVSpeechSynthesizerDelegateObject) SpeechSynthesizerDidContinueSpeechUtterance(synthesizer IAVSpeechSynthesizer, utterance IAVSpeechUtterance)

Tells the delegate when the synthesizer resumes speaking an utterance after pausing.

synthesizer: The speech synthesizer that resumes speaking the utterance.

utterance: The utterance that the speech synthesizer resumes speaking.

Discussion

The system only calls this method if a speech synthesizer pauses speaking and the system calls its [PauseSpeakingAtBoundary] method. The system doesn’t call this method if the synthesizer pauses while in a delay between utterances.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizerDelegate/speechSynthesizer(_:didContinue:)

func (AVSpeechSynthesizerDelegateObject) SpeechSynthesizerDidFinishSpeechUtterance 

func (o AVSpeechSynthesizerDelegateObject) SpeechSynthesizerDidFinishSpeechUtterance(synthesizer IAVSpeechSynthesizer, utterance IAVSpeechUtterance)

Tells the delegate when the synthesizer finishes speaking an utterance.

synthesizer: The speech synthesizer that finishes speaking the utterance.

utterance: The utterance that the speech synthesizer finishes speaking.

Discussion

The system ignores the final utterance’s [PostUtteranceDelay] and calls this method immediately when speech ends.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizerDelegate/speechSynthesizer(_:didFinish:)

func (AVSpeechSynthesizerDelegateObject) SpeechSynthesizerDidPauseSpeechUtterance 

func (o AVSpeechSynthesizerDelegateObject) SpeechSynthesizerDidPauseSpeechUtterance(synthesizer IAVSpeechSynthesizer, utterance IAVSpeechUtterance)

Tells the delegate when the synthesizer pauses while speaking an utterance.

synthesizer: The speech synthesizer that pauses speaking the utterance.

utterance: The utterance that the speech synthesizer pauses speaking.

Discussion

The system only calls this method if a speech synthesizer is speaking an utterance and the system calls its [PauseSpeakingAtBoundary] method. The system doesn’t call this method if the synthesizer is in a delay between utterances when speech pauses.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizerDelegate/speechSynthesizer(_:didPause:)

func (AVSpeechSynthesizerDelegateObject) SpeechSynthesizerDidStartSpeechUtterance 

func (o AVSpeechSynthesizerDelegateObject) SpeechSynthesizerDidStartSpeechUtterance(synthesizer IAVSpeechSynthesizer, utterance IAVSpeechUtterance)

Tells the delegate when the synthesizer begins speaking an utterance.

synthesizer: The speech synthesizer that starts speaking the utterance.

utterance: The utterance that the speech synthesizer starts speaking.

Discussion

If the utterance’s [PreUtteranceDelay] property is greater than zero, the system calls this method after the delay completes and speech begins.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizerDelegate/speechSynthesizer(_:didStart:)

func (AVSpeechSynthesizerDelegateObject) SpeechSynthesizerWillSpeakMarkerUtterance 

func (o AVSpeechSynthesizerDelegateObject) SpeechSynthesizerWillSpeakMarkerUtterance(synthesizer IAVSpeechSynthesizer, marker IAVSpeechSynthesisMarker, utterance IAVSpeechUtterance)

Tells the delegate when the synthesizer is about to speak a marker of an utterance’s text.

synthesizer: The speech synthesizer that’s about to speak a marker of an utterance.

marker: The synthesized audio that the speech synthesizer is about to speak.

utterance: The utterance that the speech synthesizer pauses speaking.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizerDelegate/speechSynthesizer(_:willSpeak:utterance:)

func (AVSpeechSynthesizerDelegateObject) SpeechSynthesizerWillSpeakRangeOfSpeechStringUtterance 

func (o AVSpeechSynthesizerDelegateObject) SpeechSynthesizerWillSpeakRangeOfSpeechStringUtterance(synthesizer IAVSpeechSynthesizer, characterRange foundation.NSRange, utterance IAVSpeechUtterance)

Tells the delegate when the synthesizer is about to speak a portion of an utterance’s text.

synthesizer: The speech synthesizer that’s about to speak an utterance.

characterRange: The range of characters in the utterance’s [SpeechString] that correspond to the unit of speech the synthesizer is about to speak.

utterance: The utterance that the speech synthesizer is about to speak.

Discussion

The system calls this method once for each unit of speech in the utterance’s text, which is generally a word.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizerDelegate/speechSynthesizer(_:willSpeakRangeOfSpeechString:utterance:)

type AVSpeechSynthesizerMarkerCallback 

type AVSpeechSynthesizerMarkerCallback = func([]AVSpeechSynthesisMarker)

AVSpeechSynthesizerMarkerCallback is a type that defines a callback that receives speech markers.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer/MarkerCallback

type AVSpeechUtterance 

type AVSpeechUtterance struct {
	objectivec.Object
}

An object that encapsulates the text for speech synthesis and parameters that affect the speech.

Overview

An AVSpeechUtterance is the basic unit of speech synthesis.

To synthesize speech, create an AVSpeechUtterance instance with text you want a speech synthesizer to speak. Optionally, change the AVSpeechUtterance.Voice, AVSpeechUtterance.PitchMultiplier, AVSpeechUtterance.Volume, AVSpeechUtterance.Rate, AVSpeechUtterance.PreUtteranceDelay, or AVSpeechUtterance.PostUtteranceDelay parameters for the utterance. Pass the utterance to an instance of AVSpeechSynthesizer to begin speech, or enqueue the utterance to speak later if the synthesizer is already speaking.

Split a body of text into multiple utterances if you want to apply different speech parameters. For example, you can emphasize a sentence by increasing the pitch and decreasing the rate of that utterance relative to others, or you can introduce pauses between sentences by putting each into an utterance with a leading or trailing delay.

Set and use the AVSpeechSynthesizerDelegate to receive notifications when the synthesizer starts or finishes speaking an utterance. Create an utterance for each meaningful unit in a body of text if you want to receive notifications as its speech progresses.

Creating an utterance

Configuring an utterance

Configuring utterance timing

Inspecting utterance text

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance

func AVSpeechUtteranceFromID 

func AVSpeechUtteranceFromID(id objc.ID) AVSpeechUtterance

AVSpeechUtteranceFromID constructs a AVSpeechUtterance from an objc.ID.

An object that encapsulates the text for speech synthesis and parameters that affect the speech.

func NewAVSpeechUtterance 

func NewAVSpeechUtterance() AVSpeechUtterance

NewAVSpeechUtterance creates a new AVSpeechUtterance instance.

func NewSpeechUtteranceWithAttributedString 

func NewSpeechUtteranceWithAttributedString(string_ foundation.NSAttributedString) AVSpeechUtterance

Creates an utterance with the attributed text string that you specify for the speech synthesizer to speak.

string: A string that contains the text to speak.

Discussion

To speak the text, pass the utterance to an instance of AVSpeechSynthesizer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/init(attributedString:)

func NewSpeechUtteranceWithSSMLRepresentation 

func NewSpeechUtteranceWithSSMLRepresentation(string_ string) AVSpeechUtterance

Creates a speech utterance with an Speech Synthesis Markup Language (SSML) string.

string: A string to speak that contains valid SSML markup. The initializer returns `nil` if you pass an invalid SSML string.

Discussion

If using SSML to request voices that fall under certain attributes, the system may split a single utterance into multiple parts and send each to an appropriate synthesizer.

If no voice matches the properties, the utterance uses the voice set in its [Voice] property. If you don’t specify a voice, the system uses its default voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/init(ssmlRepresentation:)

func NewSpeechUtteranceWithString 

func NewSpeechUtteranceWithString(string_ string) AVSpeechUtterance

Creates an utterance with the text string that you specify for the speech synthesizer to speak.

string: A string that contains the text to speak.

Return Value

An AVSpeechUtterance object that can speak the specified text.

Discussion

To speak the text, pass the utterance to an instance of AVSpeechSynthesizer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/init(string:)

func (AVSpeechUtterance) AVSpeechSynthesisIPANotationAttribute 

func (s AVSpeechUtterance) AVSpeechSynthesisIPANotationAttribute() string

A string that contains International Phonetic Alphabet (IPA) symbols the speech synthesizer uses to control pronunciation of certain words or phrases.

See: https://developer.apple.com/documentation/avfaudio/avspeechsynthesisipanotationattribute

func (AVSpeechUtterance) AVSpeechUtteranceDefaultSpeechRate 

func (s AVSpeechUtterance) AVSpeechUtteranceDefaultSpeechRate() float32

The default rate the speech synthesizer uses when speaking an utterance.

See: https://developer.apple.com/documentation/avfaudio/avspeechutterancedefaultspeechrate

func (AVSpeechUtterance) AVSpeechUtteranceMaximumSpeechRate 

func (s AVSpeechUtterance) AVSpeechUtteranceMaximumSpeechRate() float32

The maximum rate the speech synthesizer uses when speaking an utterance.

See: https://developer.apple.com/documentation/avfaudio/avspeechutterancemaximumspeechrate

func (AVSpeechUtterance) AVSpeechUtteranceMinimumSpeechRate 

func (s AVSpeechUtterance) AVSpeechUtteranceMinimumSpeechRate() float32

The minimum rate the speech synthesizer uses when speaking an utterance.

See: https://developer.apple.com/documentation/avfaudio/avspeechutteranceminimumspeechrate

func (AVSpeechUtterance) AttributedSpeechString 

func (s AVSpeechUtterance) AttributedSpeechString() foundation.NSAttributedString

An attributed string that contains the text for speech synthesis.

Discussion

You can’t change an utterance’s text after initializaiton. If you want the speech synthesizer to speak different text, create a new utterance.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/attributedSpeechString

func (AVSpeechUtterance) Autorelease 

func (s AVSpeechUtterance) Autorelease() AVSpeechUtterance

Autorelease adds the receiver to the current autorelease pool.

func (AVSpeechUtterance) EncodeWithCoder 

func (s AVSpeechUtterance) EncodeWithCoder(coder foundation.INSCoder)

func (AVSpeechUtterance) Init 

func (s AVSpeechUtterance) Init() AVSpeechUtterance

Init initializes the instance.

func (AVSpeechUtterance) InitWithAttributedString 

func (s AVSpeechUtterance) InitWithAttributedString(string_ foundation.NSAttributedString) AVSpeechUtterance

Creates an utterance with the attributed text string that you specify for the speech synthesizer to speak.

string: A string that contains the text to speak.

Discussion

To speak the text, pass the utterance to an instance of AVSpeechSynthesizer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/init(attributedString:)

func (AVSpeechUtterance) InitWithSSMLRepresentation 

func (s AVSpeechUtterance) InitWithSSMLRepresentation(string_ string) AVSpeechUtterance

Creates a speech utterance with an Speech Synthesis Markup Language (SSML) string.

string: A string to speak that contains valid SSML markup. The initializer returns `nil` if you pass an invalid SSML string.

Discussion

If using SSML to request voices that fall under certain attributes, the system may split a single utterance into multiple parts and send each to an appropriate synthesizer.

If no voice matches the properties, the utterance uses the voice set in its [Voice] property. If you don’t specify a voice, the system uses its default voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/init(ssmlRepresentation:)

func (AVSpeechUtterance) InitWithString 

func (s AVSpeechUtterance) InitWithString(string_ string) AVSpeechUtterance

Creates an utterance with the text string that you specify for the speech synthesizer to speak.

string: A string that contains the text to speak.

Return Value

An AVSpeechUtterance object that can speak the specified text.

Discussion

To speak the text, pass the utterance to an instance of AVSpeechSynthesizer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/init(string:)

func (AVSpeechUtterance) PitchMultiplier 

func (s AVSpeechUtterance) PitchMultiplier() float32

The baseline pitch the speech synthesizer uses when speaking the utterance.

Discussion

Before enqueing the utterance, set this property to a value within the range of `0.5` for lower pitch to `2.0` for higher pitch. The default value is `1.0`. Setting this after enqueing the utterance has no effect.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/pitchMultiplier

func (AVSpeechUtterance) PostUtteranceDelay 

func (s AVSpeechUtterance) PostUtteranceDelay() float64

The amount of time the speech synthesizer pauses after speaking an utterance before handling the next utterance in the queue.

Discussion

When multiple utterances exist in the queue, the speech synthesizer pauses a minimum amount of time equal to the sum of the current utterance’s `postUtteranceDelay` and the next utterance’s [PreUtteranceDelay].

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/postUtteranceDelay

func (AVSpeechUtterance) PreUtteranceDelay 

func (s AVSpeechUtterance) PreUtteranceDelay() float64

The amount of time the speech synthesizer pauses before speaking the utterance.

Discussion

When multiple utterances exist in the queue, the speech synthesizer pauses a minimum amount of time equal to the sum of the current utterance’s [PostUtteranceDelay] and the next utterance’s `preUtteranceDelay`.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/preUtteranceDelay

func (AVSpeechUtterance) PrefersAssistiveTechnologySettings 

func (s AVSpeechUtterance) PrefersAssistiveTechnologySettings() bool

A Boolean that specifies whether assistive technology settings take precedence over the property values of this utterance.

Discussion

If this property is `true`, but no assistive technology, such as VoiceOver, is on, the speech synthesizer uses the utterance property values.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/prefersAssistiveTechnologySettings

func (AVSpeechUtterance) Rate 

func (s AVSpeechUtterance) Rate() float32

The rate the speech synthesizer uses when speaking the utterance.

Discussion

The speech rate is a decimal representation within the range of AVSpeechUtteranceMinimumSpeechRate and AVSpeechUtteranceMaximumSpeechRate. Lower values correspond to slower speech, and higher values correspond to faster speech. The default value is AVSpeechUtteranceDefaultSpeechRate. Set this property before enqueing the utterance because setting it afterward has no effect.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/rate

func (AVSpeechUtterance) SetPitchMultiplier 

func (s AVSpeechUtterance) SetPitchMultiplier(value float32)

func (AVSpeechUtterance) SetPostUtteranceDelay 

func (s AVSpeechUtterance) SetPostUtteranceDelay(value float64)

func (AVSpeechUtterance) SetPreUtteranceDelay 

func (s AVSpeechUtterance) SetPreUtteranceDelay(value float64)

func (AVSpeechUtterance) SetPrefersAssistiveTechnologySettings 

func (s AVSpeechUtterance) SetPrefersAssistiveTechnologySettings(value bool)

func (AVSpeechUtterance) SetRate 

func (s AVSpeechUtterance) SetRate(value float32)

func (AVSpeechUtterance) SetVoice 

func (s AVSpeechUtterance) SetVoice(value IAVSpeechSynthesisVoice)

func (AVSpeechUtterance) SetVolume 

func (s AVSpeechUtterance) SetVolume(value float32)

func (AVSpeechUtterance) SpeechString 

func (s AVSpeechUtterance) SpeechString() string

A string that contains the text for speech synthesis.

Discussion

You can’t change an utterance’s text after initializaiton. If you want the speech synthesizer to speak different text, create a new utterance.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/speechString

func (AVSpeechUtterance) Voice 

func (s AVSpeechUtterance) Voice() IAVSpeechSynthesisVoice

The voice the speech synthesizer uses when speaking the utterance.

Discussion

If you don’t specify a voice, the speech synthesizer uses the system’s default voice to speak the utterance.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/voice

func (AVSpeechUtterance) Volume 

func (s AVSpeechUtterance) Volume() float32

The volume the speech synthesizer uses when speaking the utterance.

Discussion

Before enqueing the utterance, set this property to a value within the range of `0.0` for silent to `1.0` for loudest volume. The default value is `1.0`. Setting this after enqueing the utterance has no effect.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/volume

type AVSpeechUtteranceClass 

type AVSpeechUtteranceClass struct {
	// contains filtered or unexported fields
}

func GetAVSpeechUtteranceClass 

func GetAVSpeechUtteranceClass() AVSpeechUtteranceClass

GetAVSpeechUtteranceClass returns the class object for AVSpeechUtterance.

func (AVSpeechUtteranceClass) Alloc 

func (ac AVSpeechUtteranceClass) Alloc() AVSpeechUtterance

Alloc allocates memory for a new instance of the class.

func (AVSpeechUtteranceClass) Class 

func (ac AVSpeechUtteranceClass) Class() objc.Class

Class returns the underlying Objective-C class pointer.

func (AVSpeechUtteranceClass) SpeechUtteranceWithAttributedString 

func (_AVSpeechUtteranceClass AVSpeechUtteranceClass) SpeechUtteranceWithAttributedString(string_ foundation.NSAttributedString) AVSpeechUtterance

Creates an utterance with the attributed text string that you specify for the speech synthesizer to speak.

string: A string that contains the text to speak.

Return Value

An AVSpeechUtterance object that can speak the specified text.

Discussion

To speak the text, pass the utterance to an instance of AVSpeechSynthesizer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/speechUtteranceWithAttributedString:

func (AVSpeechUtteranceClass) SpeechUtteranceWithSSMLRepresentation 

func (_AVSpeechUtteranceClass AVSpeechUtteranceClass) SpeechUtteranceWithSSMLRepresentation(string_ string) AVSpeechUtterance

Returns a new speech utterance with an Speech Synthesis Markup Language (SSML) string.

string: A string to speak that contains valid SSML markup. The initializer returns `nil` if you pass an invalid SSML string.

Return Value

A new speech utterance, or nil if the SSML string is invalid.

Discussion

If using SSML to request voices that fall under certain attributes, the system may split a single utterance into multiple parts and send each to an appropriate synthesizer.

If no voice matches the properties, the utterance uses the voice set in its [Voice] property. If you don’t specify a voice, the system uses its default voice.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/speechUtteranceWithSSMLRepresentation:

func (AVSpeechUtteranceClass) SpeechUtteranceWithString 

func (_AVSpeechUtteranceClass AVSpeechUtteranceClass) SpeechUtteranceWithString(string_ string) AVSpeechUtterance

Creates an utterance with the text string that you specify for the speech synthesizer to speak.

string: A string that contains the text to speak.

Return Value

An AVSpeechUtterance object that can speak the specified text.

Discussion

To speak the text, pass the utterance to an instance of AVSpeechSynthesizer.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance/speechUtteranceWithString:

type BoolErrorHandler 

type BoolErrorHandler = func(bool, error)

BoolErrorHandler handles A completion handler the system calls asynchronously when the system completes audio routing arbitration.

  • defaultDeviceChanged: A Boolean value that indicates whether the system switched the AirPods to the macOS device.
  • error: An error object that indicates why the request failed, or [nil](<doc://com.apple.documentation/documentation/ObjectiveC/nil-227m0>) if the request succeeded.

The error can be type-asserted to *foundation.NSError for Domain, Code, and UserInfo.

Used by:

type BoolHandler 

type BoolHandler = func(bool)

BoolHandler handles A Boolean value that indicates whether the user grants the app permission to record audio.

Used by:

type ErrorHandler 

type ErrorHandler = func()

ErrorHandler handles The handler the system calls after the player schedules the file for playback on the render thread, or the player stops.

Used by:

type IAVAUPresetEvent 

type IAVAUPresetEvent interface {
	IAVMusicEvent

	// Creates an event with the scope, element, and dictionary for the preset.
	InitWithScopeElementDictionary(scope uint32, element uint32, presetDictionary foundation.INSDictionary) AVAUPresetEvent

	// The audio unit scope.
	Scope() uint32
	SetScope(value uint32)
	// The element index in the scope.
	Element() uint32
	SetElement(value uint32)
	// The dictionary that contains the preset.
	PresetDictionary() foundation.INSDictionary
}

An interface definition for the AVAUPresetEvent class.

Creating a Preset Event

  • [IAVAUPresetEvent.InitWithScopeElementDictionary]: Creates an event with the scope, element, and dictionary for the preset.

Configuring a Preset Event

  • [IAVAUPresetEvent.Scope]: The audio unit scope.
  • [IAVAUPresetEvent.SetScope]
  • [IAVAUPresetEvent.Element]: The element index in the scope.
  • [IAVAUPresetEvent.SetElement]
  • [IAVAUPresetEvent.PresetDictionary]: The dictionary that contains the preset.

See: https://developer.apple.com/documentation/AVFAudio/AVAUPresetEvent

type IAVAudioApplication 

type IAVAudioApplication interface {
	objectivec.IObject

	// The app’s permission to record audio.
	RecordPermission() AVAudioApplicationRecordPermission

	// A Boolean value that indicates whether the app’s audio input is in a muted state.
	InputMuted() bool
	// Sets a Boolean value that indicates whether the app’s audio input is in a muted state.
	SetInputMutedError(muted bool) (bool, error)
	// Sets a callback to handle changes to application-level audio muting states.
	SetInputMuteStateChangeHandlerError(inputMuteHandler func(bool) bool) (bool, error)
}

An interface definition for the AVAudioApplication class.

Requesting audio recording permission

  • [IAVAudioApplication.RecordPermission]: The app’s permission to record audio.

Managing audio input mute state

  • [IAVAudioApplication.InputMuted]: A Boolean value that indicates whether the app’s audio input is in a muted state.
  • [IAVAudioApplication.SetInputMutedError]: Sets a Boolean value that indicates whether the app’s audio input is in a muted state.
  • [IAVAudioApplication.SetInputMuteStateChangeHandlerError]: Sets a callback to handle changes to application-level audio muting states.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioApplication

type IAVAudioBuffer 

type IAVAudioBuffer interface {
	objectivec.IObject

	// The format of the audio in the buffer.
	Format() IAVAudioFormat

	// The buffer’s underlying audio buffer list.
	AudioBufferList() objectivec.IObject
	// A mutable version of the buffer’s underlying audio buffer list.
	MutableAudioBufferList() objectivec.IObject
}

An interface definition for the AVAudioBuffer class.

Getting the Buffer Format

  • [IAVAudioBuffer.Format]: The format of the audio in the buffer.

Getting the Audio Buffers

  • [IAVAudioBuffer.AudioBufferList]: The buffer’s underlying audio buffer list.
  • [IAVAudioBuffer.MutableAudioBufferList]: A mutable version of the buffer’s underlying audio buffer list.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioBuffer

type IAVAudioChannelLayout 

type IAVAudioChannelLayout interface {
	objectivec.IObject

	// Creates an audio channel layout object from an existing one.
	InitWithLayout(layout IAVAudioChannelLayout) AVAudioChannelLayout
	// Creates an audio channel layout object from a layout tag.
	InitWithLayoutTag(layoutTag objectivec.IObject) AVAudioChannelLayout

	// The number of channels of audio data.
	ChannelCount() AVAudioChannelCount
	// The underlying audio channel layout.
	Layout() IAVAudioChannelLayout
	// The audio channel’s underlying layout tag.
	LayoutTag() objectivec.IObject

	AVChannelLayoutKey() string
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the AVAudioChannelLayout class.

Creating an Audio Channel Layout

  • [IAVAudioChannelLayout.InitWithLayout]: Creates an audio channel layout object from an existing one.
  • [IAVAudioChannelLayout.InitWithLayoutTag]: Creates an audio channel layout object from a layout tag.

Getting Audio Channel Layout Properties

  • [IAVAudioChannelLayout.ChannelCount]: The number of channels of audio data.
  • [IAVAudioChannelLayout.Layout]: The underlying audio channel layout.
  • [IAVAudioChannelLayout.LayoutTag]: The audio channel’s underlying layout tag.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioChannelLayout

type IAVAudioCompressedBuffer 

type IAVAudioCompressedBuffer interface {
	IAVAudioBuffer

	// Creates a buffer that contains constant bytes per packet of audio data in a compressed state.
	InitWithFormatPacketCapacity(format IAVAudioFormat, packetCapacity AVAudioPacketCount) AVAudioCompressedBuffer
	// Creates a buffer that contains audio data in a compressed state.
	InitWithFormatPacketCapacityMaximumPacketSize(format IAVAudioFormat, packetCapacity AVAudioPacketCount, maximumPacketSize int) AVAudioCompressedBuffer

	// The number of packets the buffer contains.
	ByteCapacity() uint32
	// The number of valid bytes in the buffer.
	ByteLength() uint32
	SetByteLength(value uint32)
	// The audio buffer’s data bytes.
	Data() unsafe.Pointer
	// The maximum size of a packet, in bytes.
	MaximumPacketSize() int
	// The total number of packets that the buffer can contain.
	PacketCapacity() AVAudioPacketCount
	// The number of packets currently in the buffer.
	PacketCount() AVAudioPacketCount
	SetPacketCount(value AVAudioPacketCount)
	// The buffer’s array of packet descriptions.
	PacketDescriptions() objectivec.IObject

	// The buffer’s array of packet dependencies.
	PacketDependencies() objectivec.IObject
}

An interface definition for the AVAudioCompressedBuffer class.

Creating an Audio Buffer

  • [IAVAudioCompressedBuffer.InitWithFormatPacketCapacity]: Creates a buffer that contains constant bytes per packet of audio data in a compressed state.
  • [IAVAudioCompressedBuffer.InitWithFormatPacketCapacityMaximumPacketSize]: Creates a buffer that contains audio data in a compressed state.

Getting Audio Buffer Properties

  • [IAVAudioCompressedBuffer.ByteCapacity]: The number of packets the buffer contains.
  • [IAVAudioCompressedBuffer.ByteLength]: The number of valid bytes in the buffer.
  • [IAVAudioCompressedBuffer.SetByteLength]
  • [IAVAudioCompressedBuffer.Data]: The audio buffer’s data bytes.
  • [IAVAudioCompressedBuffer.MaximumPacketSize]: The maximum size of a packet, in bytes.
  • [IAVAudioCompressedBuffer.PacketCapacity]: The total number of packets that the buffer can contain.
  • [IAVAudioCompressedBuffer.PacketCount]: The number of packets currently in the buffer.
  • [IAVAudioCompressedBuffer.SetPacketCount]
  • [IAVAudioCompressedBuffer.PacketDescriptions]: The buffer’s array of packet descriptions.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioCompressedBuffer

type IAVAudioConnectionPoint 

type IAVAudioConnectionPoint interface {
	objectivec.IObject

	// Creates a connection point object.
	InitWithNodeBus(node IAVAudioNode, bus AVAudioNodeBus) AVAudioConnectionPoint

	// Returns connection information about a node’s input bus.
	InputConnectionPointForNodeInputBus(node IAVAudioNode, bus AVAudioNodeBus) IAVAudioConnectionPoint
	// Returns connection information about a node’s output bus.
	OutputConnectionPointsForNodeOutputBus(node IAVAudioNode, bus AVAudioNodeBus) []AVAudioConnectionPoint
	// The bus on the node in the connection point.
	Bus() AVAudioNodeBus
	// The node in the connection point.
	Node() IAVAudioNode
}

An interface definition for the AVAudioConnectionPoint class.

Creating a Connection Point

  • [IAVAudioConnectionPoint.InitWithNodeBus]: Creates a connection point object.

Getting Connection Point Properties

  • [IAVAudioConnectionPoint.InputConnectionPointForNodeInputBus]: Returns connection information about a node’s input bus.
  • [IAVAudioConnectionPoint.OutputConnectionPointsForNodeOutputBus]: Returns connection information about a node’s output bus.
  • [IAVAudioConnectionPoint.Bus]: The bus on the node in the connection point.
  • [IAVAudioConnectionPoint.Node]: The node in the connection point.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConnectionPoint

type IAVAudioConverter 

type IAVAudioConverter interface {
	objectivec.IObject

	// Creates an audio converter object from the specified input and output formats.
	InitFromFormatToFormat(fromFormat IAVAudioFormat, toFormat IAVAudioFormat) AVAudioConverter

	// Performs a conversion between audio formats, if the system supports it.
	ConvertToBufferErrorWithInputFromBlock(outputBuffer IAVAudioBuffer, outError foundation.INSError, inputBlock AVAudioConverterInputBlock) AVAudioConverterOutputStatus
	// Performs a basic conversion between audio formats that doesn’t involve converting codecs or sample rates.
	ConvertToBufferFromBufferError(outputBuffer IAVAudioPCMBuffer, inputBuffer IAVAudioPCMBuffer) (bool, error)

	// Resets the converter so you can convert a new audio stream.
	Reset()

	// An array of integers that indicates which input to derive each output from.
	ChannelMap() []foundation.NSNumber
	SetChannelMap(value []foundation.NSNumber)
	// A Boolean value that indicates whether dither is on.
	Dither() bool
	SetDither(value bool)
	// A Boolean value that indicates whether the framework mixes the channels instead of remapping.
	Downmix() bool
	SetDownmix(value bool)
	// The format of the input audio stream.
	InputFormat() IAVAudioFormat
	// The format of the output audio stream.
	OutputFormat() IAVAudioFormat
	// An object that contains metadata for encoders and decoders.
	MagicCookie() foundation.INSData
	SetMagicCookie(value foundation.INSData)
	// The maximum size of an output packet, in bytes.
	MaximumOutputPacketSize() int

	// An array of bit rates the framework applies during encoding according to the current formats and settings.
	ApplicableEncodeBitRates() []foundation.NSNumber
	// An array of all bit rates the codec provides when encoding.
	AvailableEncodeBitRates() []foundation.NSNumber
	// An array of all output channel layout tags the codec provides when encoding.
	AvailableEncodeChannelLayoutTags() []foundation.NSNumber
	// The bit rate, in bits per second.
	BitRate() int
	SetBitRate(value int)
	// A key value constant the framework uses during encoding.
	BitRateStrategy() string
	SetBitRateStrategy(value string)

	// A sample rate converter algorithm key value.
	SampleRateConverterQuality() int
	SetSampleRateConverterQuality(value int)
	// The priming method the sample rate converter or decoder uses.
	SampleRateConverterAlgorithm() string
	SetSampleRateConverterAlgorithm(value string)
	// An array of output sample rates that the converter applies according to the current formats and settings, when encoding.
	ApplicableEncodeSampleRates() []foundation.NSNumber
	// An array of all output sample rates the codec provides when encoding.
	AvailableEncodeSampleRates() []foundation.NSNumber

	// The number of priming frames the converter uses.
	PrimeInfo() AVAudioConverterPrimeInfo
	SetPrimeInfo(value AVAudioConverterPrimeInfo)
	// The priming method the sample rate converter or decoder uses.
	PrimeMethod() AVAudioConverterPrimeMethod
	SetPrimeMethod(value AVAudioConverterPrimeMethod)

	AudioSyncPacketFrequency() int
	SetAudioSyncPacketFrequency(value int)
	ContentSource() AVAudioContentSource
	SetContentSource(value AVAudioContentSource)
	DynamicRangeControlConfiguration() AVAudioDynamicRangeControlConfiguration
	SetDynamicRangeControlConfiguration(value AVAudioDynamicRangeControlConfiguration)
}

An interface definition for the AVAudioConverter class.

Creating an Audio Converter

  • [IAVAudioConverter.InitFromFormatToFormat]: Creates an audio converter object from the specified input and output formats.

Converting Audio Formats

  • [IAVAudioConverter.ConvertToBufferErrorWithInputFromBlock]: Performs a conversion between audio formats, if the system supports it.
  • [IAVAudioConverter.ConvertToBufferFromBufferError]: Performs a basic conversion between audio formats that doesn’t involve converting codecs or sample rates.

Resetting an Audio Converter

  • [IAVAudioConverter.Reset]: Resets the converter so you can convert a new audio stream.

Getting Audio Converter Properties

  • [IAVAudioConverter.ChannelMap]: An array of integers that indicates which input to derive each output from.
  • [IAVAudioConverter.SetChannelMap]
  • [IAVAudioConverter.Dither]: A Boolean value that indicates whether dither is on.
  • [IAVAudioConverter.SetDither]
  • [IAVAudioConverter.Downmix]: A Boolean value that indicates whether the framework mixes the channels instead of remapping.
  • [IAVAudioConverter.SetDownmix]
  • [IAVAudioConverter.InputFormat]: The format of the input audio stream.
  • [IAVAudioConverter.OutputFormat]: The format of the output audio stream.
  • [IAVAudioConverter.MagicCookie]: An object that contains metadata for encoders and decoders.
  • [IAVAudioConverter.SetMagicCookie]
  • [IAVAudioConverter.MaximumOutputPacketSize]: The maximum size of an output packet, in bytes.

Getting Bit Rate Properties

  • [IAVAudioConverter.ApplicableEncodeBitRates]: An array of bit rates the framework applies during encoding according to the current formats and settings.
  • [IAVAudioConverter.AvailableEncodeBitRates]: An array of all bit rates the codec provides when encoding.
  • [IAVAudioConverter.AvailableEncodeChannelLayoutTags]: An array of all output channel layout tags the codec provides when encoding.
  • [IAVAudioConverter.BitRate]: The bit rate, in bits per second.
  • [IAVAudioConverter.SetBitRate]
  • [IAVAudioConverter.BitRateStrategy]: A key value constant the framework uses during encoding.
  • [IAVAudioConverter.SetBitRateStrategy]

Getting Sample Rate Properties

  • [IAVAudioConverter.SampleRateConverterQuality]: A sample rate converter algorithm key value.
  • [IAVAudioConverter.SetSampleRateConverterQuality]
  • [IAVAudioConverter.SampleRateConverterAlgorithm]: The priming method the sample rate converter or decoder uses.
  • [IAVAudioConverter.SetSampleRateConverterAlgorithm]
  • [IAVAudioConverter.ApplicableEncodeSampleRates]: An array of output sample rates that the converter applies according to the current formats and settings, when encoding.
  • [IAVAudioConverter.AvailableEncodeSampleRates]: An array of all output sample rates the codec provides when encoding.

Getting Priming Information

  • [IAVAudioConverter.PrimeInfo]: The number of priming frames the converter uses.
  • [IAVAudioConverter.SetPrimeInfo]
  • [IAVAudioConverter.PrimeMethod]: The priming method the sample rate converter or decoder uses.
  • [IAVAudioConverter.SetPrimeMethod]

Managing packet dependencies

  • [IAVAudioConverter.AudioSyncPacketFrequency]
  • [IAVAudioConverter.SetAudioSyncPacketFrequency]
  • [IAVAudioConverter.ContentSource]
  • [IAVAudioConverter.SetContentSource]
  • [IAVAudioConverter.DynamicRangeControlConfiguration]
  • [IAVAudioConverter.SetDynamicRangeControlConfiguration]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioConverter

type IAVAudioEngine 

type IAVAudioEngine interface {
	objectivec.IObject

	// Attaches an audio node to the audio engine.
	AttachNode(node IAVAudioNode)
	// Detaches an audio node from the audio engine.
	DetachNode(node IAVAudioNode)
	// A read-only set that contains the nodes you attach to the audio engine.
	AttachedNodes() foundation.INSSet

	// The audio engine’s singleton input audio node.
	InputNode() IAVAudioInputNode
	// The audio engine’s singleton output audio node.
	OutputNode() IAVAudioOutputNode
	// The audio engine’s optional singleton main mixer node.
	MainMixerNode() IAVAudioMixerNode

	// Establishes a connection between two nodes.
	ConnectToFormat(node1 IAVAudioNode, node2 IAVAudioNode, format IAVAudioFormat)
	// Establishes a connection between two nodes, specifying the input and output busses.
	ConnectToFromBusToBusFormat(node1 IAVAudioNode, node2 IAVAudioNode, bus1 AVAudioNodeBus, bus2 AVAudioNodeBus, format IAVAudioFormat)
	// Removes all input connections of the node.
	DisconnectNodeInput(node IAVAudioNode)
	// Removes the input connection of a node on the specified bus.
	DisconnectNodeInputBus(node IAVAudioNode, bus AVAudioNodeBus)
	// Removes all output connections of a node.
	DisconnectNodeOutput(node IAVAudioNode)
	// Removes the output connection of a node on the specified bus.
	DisconnectNodeOutputBus(node IAVAudioNode, bus AVAudioNodeBus)

	// Establishes a MIDI connection between two nodes.
	ConnectMIDIToFormatEventListBlock(sourceNode IAVAudioNode, destinationNode IAVAudioNode, format IAVAudioFormat, tapBlock objectivec.IObject)
	// Establishes a MIDI connection between a source node and multiple destination nodes.
	ConnectMIDIToNodesFormatEventListBlock(sourceNode IAVAudioNode, destinationNodes []AVAudioNode, format IAVAudioFormat, tapBlock objectivec.IObject)
	// Removes a MIDI connection between two nodes.
	DisconnectMIDIFrom(sourceNode IAVAudioNode, destinationNode IAVAudioNode)
	// Removes a MIDI connection between one source node and multiple destination nodes.
	DisconnectMIDIFromNodes(sourceNode IAVAudioNode, destinationNodes []AVAudioNode)
	// Disconnects all input MIDI connections from a node.
	DisconnectMIDIInput(node IAVAudioNode)
	// Disconnects all output MIDI connections from a node.
	DisconnectMIDIOutput(node IAVAudioNode)

	// Prepares the audio engine for starting.
	Prepare()
	// Starts the audio engine.
	StartAndReturnError() (bool, error)
	// A Boolean value that indicates whether the audio engine is running.
	Running() bool
	// Pauses the audio engine.
	Pause()
	// Stops the audio engine and releases any previously prepared resources.
	Stop()
	// Resets all audio nodes in the audio engine.
	Reset()
	// The music sequence instance that you attach to the audio engine, if any.
	MusicSequence() objectivec.IObject
	SetMusicSequence(value objectivec.IObject)

	// Sets the engine to operate in manual rendering mode with the render format and maximum frame count you specify.
	EnableManualRenderingModeFormatMaximumFrameCountError(mode AVAudioEngineManualRenderingMode, pcmFormat IAVAudioFormat, maximumFrameCount AVAudioFrameCount) (bool, error)
	// Sets the engine to render to or from an audio device.
	DisableManualRenderingMode()
	// Makes a render call to the engine operating in the offline manual rendering mode.
	RenderOfflineToBufferError(numberOfFrames AVAudioFrameCount, buffer IAVAudioPCMBuffer) (AVAudioEngineManualRenderingStatus, error)

	// The block that renders the engine when operating in manual rendering mode.
	ManualRenderingBlock() AVAudioEngineManualRenderingBlock
	// The render format of the engine in manual rendering mode.
	ManualRenderingFormat() IAVAudioFormat
	// The maximum number of PCM sample frames the engine produces in any single render call in manual rendering mode.
	ManualRenderingMaximumFrameCount() AVAudioFrameCount
	// The manual rendering mode configured on the engine.
	ManualRenderingMode() AVAudioEngineManualRenderingMode
	// An indication of where the engine is on its render timeline in manual rendering mode.
	ManualRenderingSampleTime() AVAudioFramePosition
	// A Boolean value that indicates whether autoshutdown is in an enabled state.
	AutoShutdownEnabled() bool
	SetAutoShutdownEnabled(value bool)
	// A Boolean value that indicates whether the engine is operating in manual rendering mode.
	IsInManualRenderingMode() bool

	// Establishes a connection between a source node and multiple destination nodes.
	ConnectToConnectionPointsFromBusFormat(sourceNode IAVAudioNode, destNodes []AVAudioConnectionPoint, sourceBus AVAudioNodeBus, format IAVAudioFormat)
	// Returns connection information about a node’s input bus.
	InputConnectionPointForNodeInputBus(node IAVAudioNode, bus AVAudioNodeBus) IAVAudioConnectionPoint
	// Returns connection information about a node’s output bus.
	OutputConnectionPointsForNodeOutputBus(node IAVAudioNode, bus AVAudioNodeBus) []AVAudioConnectionPoint
}

An interface definition for the AVAudioEngine class.

Attaching and Detaching Audio Nodes

  • [IAVAudioEngine.AttachNode]: Attaches an audio node to the audio engine.
  • [IAVAudioEngine.DetachNode]: Detaches an audio node from the audio engine.
  • [IAVAudioEngine.AttachedNodes]: A read-only set that contains the nodes you attach to the audio engine.

Getting the Input, Output, and Main Mixer Nodes

  • [IAVAudioEngine.InputNode]: The audio engine’s singleton input audio node.
  • [IAVAudioEngine.OutputNode]: The audio engine’s singleton output audio node.
  • [IAVAudioEngine.MainMixerNode]: The audio engine’s optional singleton main mixer node.

Connecting and Disconnecting Audio Nodes

  • [IAVAudioEngine.ConnectToFormat]: Establishes a connection between two nodes.
  • [IAVAudioEngine.ConnectToFromBusToBusFormat]: Establishes a connection between two nodes, specifying the input and output busses.
  • [IAVAudioEngine.DisconnectNodeInput]: Removes all input connections of the node.
  • [IAVAudioEngine.DisconnectNodeInputBus]: Removes the input connection of a node on the specified bus.
  • [IAVAudioEngine.DisconnectNodeOutput]: Removes all output connections of a node.
  • [IAVAudioEngine.DisconnectNodeOutputBus]: Removes the output connection of a node on the specified bus.

Managing MIDI Nodes

  • [IAVAudioEngine.ConnectMIDIToFormatEventListBlock]: Establishes a MIDI connection between two nodes.
  • [IAVAudioEngine.ConnectMIDIToNodesFormatEventListBlock]: Establishes a MIDI connection between a source node and multiple destination nodes.
  • [IAVAudioEngine.DisconnectMIDIFrom]: Removes a MIDI connection between two nodes.
  • [IAVAudioEngine.DisconnectMIDIFromNodes]: Removes a MIDI connection between one source node and multiple destination nodes.
  • [IAVAudioEngine.DisconnectMIDIInput]: Disconnects all input MIDI connections from a node.
  • [IAVAudioEngine.DisconnectMIDIOutput]: Disconnects all output MIDI connections from a node.

Playing Audio

  • [IAVAudioEngine.Prepare]: Prepares the audio engine for starting.
  • [IAVAudioEngine.StartAndReturnError]: Starts the audio engine.
  • [IAVAudioEngine.Running]: A Boolean value that indicates whether the audio engine is running.
  • [IAVAudioEngine.Pause]: Pauses the audio engine.
  • [IAVAudioEngine.Stop]: Stops the audio engine and releases any previously prepared resources.
  • [IAVAudioEngine.Reset]: Resets all audio nodes in the audio engine.
  • [IAVAudioEngine.MusicSequence]: The music sequence instance that you attach to the audio engine, if any.
  • [IAVAudioEngine.SetMusicSequence]

Manually Rendering an Audio Engine

  • [IAVAudioEngine.EnableManualRenderingModeFormatMaximumFrameCountError]: Sets the engine to operate in manual rendering mode with the render format and maximum frame count you specify.
  • [IAVAudioEngine.DisableManualRenderingMode]: Sets the engine to render to or from an audio device.
  • [IAVAudioEngine.RenderOfflineToBufferError]: Makes a render call to the engine operating in the offline manual rendering mode.

Getting Manual Rendering Properties

  • [IAVAudioEngine.ManualRenderingBlock]: The block that renders the engine when operating in manual rendering mode.
  • [IAVAudioEngine.ManualRenderingFormat]: The render format of the engine in manual rendering mode.
  • [IAVAudioEngine.ManualRenderingMaximumFrameCount]: The maximum number of PCM sample frames the engine produces in any single render call in manual rendering mode.
  • [IAVAudioEngine.ManualRenderingMode]: The manual rendering mode configured on the engine.
  • [IAVAudioEngine.ManualRenderingSampleTime]: An indication of where the engine is on its render timeline in manual rendering mode.
  • [IAVAudioEngine.AutoShutdownEnabled]: A Boolean value that indicates whether autoshutdown is in an enabled state.
  • [IAVAudioEngine.SetAutoShutdownEnabled]
  • [IAVAudioEngine.IsInManualRenderingMode]: A Boolean value that indicates whether the engine is operating in manual rendering mode.

Using Connection Points

  • [IAVAudioEngine.ConnectToConnectionPointsFromBusFormat]: Establishes a connection between a source node and multiple destination nodes.
  • [IAVAudioEngine.InputConnectionPointForNodeInputBus]: Returns connection information about a node’s input bus.
  • [IAVAudioEngine.OutputConnectionPointsForNodeOutputBus]: Returns connection information about a node’s output bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEngine

type IAVAudioEnvironmentDistanceAttenuationParameters 

type IAVAudioEnvironmentDistanceAttenuationParameters interface {
	objectivec.IObject

	// The distance attenuation model that describes the drop-off in gain as the source moves away from the listener.
	DistanceAttenuationModel() AVAudioEnvironmentDistanceAttenuationModel
	SetDistanceAttenuationModel(value AVAudioEnvironmentDistanceAttenuationModel)

	// The distance beyond which the node applies no further attenuation, in meters.
	MaximumDistance() float32
	SetMaximumDistance(value float32)
	// The minimum distance at which the node applies attenuation, in meters.
	ReferenceDistance() float32
	SetReferenceDistance(value float32)
	// A factor that determines the attenuation curve.
	RolloffFactor() float32
	SetRolloffFactor(value float32)
}

An interface definition for the AVAudioEnvironmentDistanceAttenuationParameters class.

Getting and Setting the Attenuation Model

  • [IAVAudioEnvironmentDistanceAttenuationParameters.DistanceAttenuationModel]: The distance attenuation model that describes the drop-off in gain as the source moves away from the listener.
  • [IAVAudioEnvironmentDistanceAttenuationParameters.SetDistanceAttenuationModel]

Getting and Setting the Attenuation Values

  • [IAVAudioEnvironmentDistanceAttenuationParameters.MaximumDistance]: The distance beyond which the node applies no further attenuation, in meters.
  • [IAVAudioEnvironmentDistanceAttenuationParameters.SetMaximumDistance]
  • [IAVAudioEnvironmentDistanceAttenuationParameters.ReferenceDistance]: The minimum distance at which the node applies attenuation, in meters.
  • [IAVAudioEnvironmentDistanceAttenuationParameters.SetReferenceDistance]
  • [IAVAudioEnvironmentDistanceAttenuationParameters.RolloffFactor]: A factor that determines the attenuation curve.
  • [IAVAudioEnvironmentDistanceAttenuationParameters.SetRolloffFactor]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentDistanceAttenuationParameters

type IAVAudioEnvironmentNode 

type IAVAudioEnvironmentNode interface {
	IAVAudioNode
	AVAudio3DMixing
	AVAudioMixing
	AVAudioStereoMixing

	// The listener’s position in the 3D environment.
	ListenerPosition() AVAudio3DPoint
	SetListenerPosition(value AVAudio3DPoint)
	// The listener’s angular orientation in the environment.
	ListenerAngularOrientation() AVAudio3DAngularOrientation
	SetListenerAngularOrientation(value AVAudio3DAngularOrientation)
	// The listener’s vector orientation in the environment.
	ListenerVectorOrientation() AVAudio3DVectorOrientation
	SetListenerVectorOrientation(value AVAudio3DVectorOrientation)

	// The distance attenuation parameters for the environment.
	DistanceAttenuationParameters() IAVAudioEnvironmentDistanceAttenuationParameters
	// The reverb parameters for the environment.
	ReverbParameters() IAVAudioEnvironmentReverbParameters

	// The mixer’s output volume.
	OutputVolume() float32
	SetOutputVolume(value float32)
	// The type of output hardware.
	OutputType() AVAudioEnvironmentOutputType
	SetOutputType(value AVAudioEnvironmentOutputType)

	// An array of rendering algorithms applicable to the environment node.
	ApplicableRenderingAlgorithms() []foundation.NSNumber

	// A Boolean value that indicates whether the listener orientation is automatically rotated based on head orientation.
	ListenerHeadTrackingEnabled() bool
	SetListenerHeadTrackingEnabled(value bool)

	// An unused input bus.
	NextAvailableInputBus() AVAudioNodeBus

	// A quadraphonic symmetrical layout, recommended for use by audio units.
	KAudioChannelLayoutTag_AudioUnit_4() objectivec.IObject
	SetKAudioChannelLayoutTag_AudioUnit_4(value objectivec.IObject)
	// A 5-channel surround-based layout, recommended for use by audio units.
	KAudioChannelLayoutTag_AudioUnit_5_0() objectivec.IObject
	SetKAudioChannelLayoutTag_AudioUnit_5_0(value objectivec.IObject)
	// A 6-channel surround-based layout, recommended for use by audio units.
	KAudioChannelLayoutTag_AudioUnit_6_0() objectivec.IObject
	SetKAudioChannelLayoutTag_AudioUnit_6_0(value objectivec.IObject)
	// A 7-channel surround-based layout, recommended for use by audio units.
	KAudioChannelLayoutTag_AudioUnit_7_0() objectivec.IObject
	SetKAudioChannelLayoutTag_AudioUnit_7_0(value objectivec.IObject)
	// An alternate 7-channel surround-based layout, for use by audio units.
	KAudioChannelLayoutTag_AudioUnit_7_0_Front() objectivec.IObject
	SetKAudioChannelLayoutTag_AudioUnit_7_0_Front(value objectivec.IObject)
	// An octagonal symmetrical layout, recommended for use by audio units.
	KAudioChannelLayoutTag_AudioUnit_8() objectivec.IObject
	SetKAudioChannelLayoutTag_AudioUnit_8(value objectivec.IObject)
}

An interface definition for the AVAudioEnvironmentNode class.

Getting and Setting Positional Properties

  • [IAVAudioEnvironmentNode.ListenerPosition]: The listener’s position in the 3D environment.
  • [IAVAudioEnvironmentNode.SetListenerPosition]
  • [IAVAudioEnvironmentNode.ListenerAngularOrientation]: The listener’s angular orientation in the environment.
  • [IAVAudioEnvironmentNode.SetListenerAngularOrientation]
  • [IAVAudioEnvironmentNode.ListenerVectorOrientation]: The listener’s vector orientation in the environment.
  • [IAVAudioEnvironmentNode.SetListenerVectorOrientation]

Getting Attenuation and Reverb Properties

  • [IAVAudioEnvironmentNode.DistanceAttenuationParameters]: The distance attenuation parameters for the environment.
  • [IAVAudioEnvironmentNode.ReverbParameters]: The reverb parameters for the environment.

Getting and Setting Environment Properties

  • [IAVAudioEnvironmentNode.OutputVolume]: The mixer’s output volume.
  • [IAVAudioEnvironmentNode.SetOutputVolume]
  • [IAVAudioEnvironmentNode.OutputType]: The type of output hardware.
  • [IAVAudioEnvironmentNode.SetOutputType]

Getting the Available Rendering Algorithms

  • [IAVAudioEnvironmentNode.ApplicableRenderingAlgorithms]: An array of rendering algorithms applicable to the environment node.

Getting the Head Tracking Status

  • [IAVAudioEnvironmentNode.ListenerHeadTrackingEnabled]: A Boolean value that indicates whether the listener orientation is automatically rotated based on head orientation.
  • [IAVAudioEnvironmentNode.SetListenerHeadTrackingEnabled]

Getting the Input Bus

  • [IAVAudioEnvironmentNode.NextAvailableInputBus]: An unused input bus.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentNode

type IAVAudioEnvironmentReverbParameters 

type IAVAudioEnvironmentReverbParameters interface {
	objectivec.IObject

	// A Boolean value that indicates whether reverberation is in an enabled state.
	Enable() bool
	SetEnable(value bool)

	// Controls the amount of reverb, in decibels.
	Level() float32
	SetLevel(value float32)
	// A filter that the system applies to the output.
	FilterParameters() IAVAudioUnitEQFilterParameters
	// Loads one of the reverbs factory presets.
	LoadFactoryReverbPreset(preset AVAudioUnitReverbPreset)
}

An interface definition for the AVAudioEnvironmentReverbParameters class.

Enabling and Disabling Reverb

  • [IAVAudioEnvironmentReverbParameters.Enable]: A Boolean value that indicates whether reverberation is in an enabled state.
  • [IAVAudioEnvironmentReverbParameters.SetEnable]

Getting and Setting Reverb Values

  • [IAVAudioEnvironmentReverbParameters.Level]: Controls the amount of reverb, in decibels.
  • [IAVAudioEnvironmentReverbParameters.SetLevel]
  • [IAVAudioEnvironmentReverbParameters.FilterParameters]: A filter that the system applies to the output.
  • [IAVAudioEnvironmentReverbParameters.LoadFactoryReverbPreset]: Loads one of the reverbs factory presets.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioEnvironmentReverbParameters

type IAVAudioFile 

type IAVAudioFile interface {
	objectivec.IObject

	// Opens a file for reading using the standard, deinterleaved floating point format.
	InitForReadingError(fileURL foundation.INSURL) (AVAudioFile, error)
	// Opens a file for reading using the specified processing format.
	InitForReadingCommonFormatInterleavedError(fileURL foundation.INSURL, format AVAudioCommonFormat, interleaved bool) (AVAudioFile, error)
	// Opens a file for writing using the specified settings.
	InitForWritingSettingsError(fileURL foundation.INSURL, settings foundation.INSDictionary) (AVAudioFile, error)
	// Opens a file for writing using a specified processing format and settings.
	InitForWritingSettingsCommonFormatInterleavedError(fileURL foundation.INSURL, settings foundation.INSDictionary, format AVAudioCommonFormat, interleaved bool) (AVAudioFile, error)

	// Reads an entire audio buffer.
	ReadIntoBufferError(buffer IAVAudioPCMBuffer) (bool, error)
	// Reads a portion of an audio buffer using the number of frames you specify.
	ReadIntoBufferFrameCountError(buffer IAVAudioPCMBuffer, frames AVAudioFrameCount) (bool, error)
	// Writes an audio buffer sequentially.
	WriteFromBufferError(buffer IAVAudioPCMBuffer) (bool, error)
	// Closes the audio file.
	Close()

	// The location of the audio file.
	Url() foundation.INSURL
	// The on-disk format of the file.
	FileFormat() IAVAudioFormat
	// The processing format of the file.
	ProcessingFormat() IAVAudioFormat
	// The number of sample frames in the file.
	Length() AVAudioFramePosition
	// The position in the file where the next read or write operation occurs.
	FramePosition() AVAudioFramePosition
	SetFramePosition(value AVAudioFramePosition)
	// A string that indicates the audio file type.
	AVAudioFileTypeKey() string
	// A Boolean value that indicates whether the file is open.
	IsOpen() bool
}

An interface definition for the AVAudioFile class.

Creating an Audio File

  • [IAVAudioFile.InitForReadingError]: Opens a file for reading using the standard, deinterleaved floating point format.
  • [IAVAudioFile.InitForReadingCommonFormatInterleavedError]: Opens a file for reading using the specified processing format.
  • [IAVAudioFile.InitForWritingSettingsError]: Opens a file for writing using the specified settings.
  • [IAVAudioFile.InitForWritingSettingsCommonFormatInterleavedError]: Opens a file for writing using a specified processing format and settings.

Reading and Writing the Audio Buffer

  • [IAVAudioFile.ReadIntoBufferError]: Reads an entire audio buffer.
  • [IAVAudioFile.ReadIntoBufferFrameCountError]: Reads a portion of an audio buffer using the number of frames you specify.
  • [IAVAudioFile.WriteFromBufferError]: Writes an audio buffer sequentially.
  • [IAVAudioFile.Close]: Closes the audio file.

Getting Audio File Properties

  • [IAVAudioFile.Url]: The location of the audio file.
  • [IAVAudioFile.FileFormat]: The on-disk format of the file.
  • [IAVAudioFile.ProcessingFormat]: The processing format of the file.
  • [IAVAudioFile.Length]: The number of sample frames in the file.
  • [IAVAudioFile.FramePosition]: The position in the file where the next read or write operation occurs.
  • [IAVAudioFile.SetFramePosition]
  • [IAVAudioFile.AVAudioFileTypeKey]: A string that indicates the audio file type.
  • [IAVAudioFile.IsOpen]: A Boolean value that indicates whether the file is open.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFile

type IAVAudioFormat 

type IAVAudioFormat interface {
	objectivec.IObject

	// Creates an audio format instance as a deinterleaved float with the specified sample rate and channel layout.
	InitStandardFormatWithSampleRateChannelLayout(sampleRate float64, layout IAVAudioChannelLayout) AVAudioFormat
	// Creates an audio format instance with the specified sample rate and channel count.
	InitStandardFormatWithSampleRateChannels(sampleRate float64, channels AVAudioChannelCount) AVAudioFormat
	// Creates an audio format instance.
	InitWithCommonFormatSampleRateChannelsInterleaved(format AVAudioCommonFormat, sampleRate float64, channels AVAudioChannelCount, interleaved bool) AVAudioFormat
	// Creates an audio format instance with the specified audio format, sample rate, interleaved state, and channel layout.
	InitWithCommonFormatSampleRateInterleavedChannelLayout(format AVAudioCommonFormat, sampleRate float64, interleaved bool, layout IAVAudioChannelLayout) AVAudioFormat
	// Creates an audio format instance using the specified settings dictionary.
	InitWithSettings(settings foundation.INSDictionary) AVAudioFormat
	// Creates an audio format instance from a stream description.
	InitWithStreamDescription(asbd objectivec.IObject) AVAudioFormat
	// Creates an audio format instance from a stream description and channel layout.
	InitWithStreamDescriptionChannelLayout(asbd objectivec.IObject, layout IAVAudioChannelLayout) AVAudioFormat
	// Creates an audio format instance from a Core Media audio format description.
	InitWithCMAudioFormatDescription(formatDescription coremedia.CMFormatDescriptionRef) AVAudioFormat

	// The audio format properties of a stream of audio data.
	StreamDescription() objectivec.IObject

	// The audio format sampling rate, in hertz.
	SampleRate() float64
	// The number of channels of audio data.
	ChannelCount() AVAudioChannelCount
	// The underlying audio channel layout.
	ChannelLayout() IAVAudioChannelLayout
	// The audio format description to use with Core Media APIs.
	FormatDescription() coremedia.CMFormatDescriptionRef

	// A Boolean value that indicates whether the samples mix into one stream.
	Interleaved() bool
	// A Boolean value that indicates whether the format is in a deinterleaved native-endian float state.
	Standard() bool
	// The common format identifier instance.
	CommonFormat() AVAudioCommonFormat
	// A dictionary that represents the format as a dictionary using audio setting keys.
	Settings() foundation.INSDictionary
	// An object that contains metadata that encoders and decoders require.
	MagicCookie() foundation.INSData
	SetMagicCookie(value foundation.INSData)

	AVChannelLayoutKey() string
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the AVAudioFormat class.

Creating a New Audio Format Representation

  • [IAVAudioFormat.InitStandardFormatWithSampleRateChannelLayout]: Creates an audio format instance as a deinterleaved float with the specified sample rate and channel layout.
  • [IAVAudioFormat.InitStandardFormatWithSampleRateChannels]: Creates an audio format instance with the specified sample rate and channel count.
  • [IAVAudioFormat.InitWithCommonFormatSampleRateChannelsInterleaved]: Creates an audio format instance.
  • [IAVAudioFormat.InitWithCommonFormatSampleRateInterleavedChannelLayout]: Creates an audio format instance with the specified audio format, sample rate, interleaved state, and channel layout.
  • [IAVAudioFormat.InitWithSettings]: Creates an audio format instance using the specified settings dictionary.
  • [IAVAudioFormat.InitWithStreamDescription]: Creates an audio format instance from a stream description.
  • [IAVAudioFormat.InitWithStreamDescriptionChannelLayout]: Creates an audio format instance from a stream description and channel layout.
  • [IAVAudioFormat.InitWithCMAudioFormatDescription]: Creates an audio format instance from a Core Media audio format description.

Getting the Audio Stream Description

  • [IAVAudioFormat.StreamDescription]: The audio format properties of a stream of audio data.

Getting Audio Format Values

  • [IAVAudioFormat.SampleRate]: The audio format sampling rate, in hertz.
  • [IAVAudioFormat.ChannelCount]: The number of channels of audio data.
  • [IAVAudioFormat.ChannelLayout]: The underlying audio channel layout.
  • [IAVAudioFormat.FormatDescription]: The audio format description to use with Core Media APIs.

Determining the Audio Format

  • [IAVAudioFormat.Interleaved]: A Boolean value that indicates whether the samples mix into one stream.
  • [IAVAudioFormat.Standard]: A Boolean value that indicates whether the format is in a deinterleaved native-endian float state.
  • [IAVAudioFormat.CommonFormat]: The common format identifier instance.
  • [IAVAudioFormat.Settings]: A dictionary that represents the format as a dictionary using audio setting keys.
  • [IAVAudioFormat.MagicCookie]: An object that contains metadata that encoders and decoders require.
  • [IAVAudioFormat.SetMagicCookie]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioFormat

type IAVAudioIONode 

type IAVAudioIONode interface {
	IAVAudioNode

	// The node’s underlying audio unit, if any.
	AudioUnit() IAVAudioUnit

	// The presentation or hardware latency, applicable when rendering to or from an audio device.
	PresentationLatency() float64

	// Enables or disables voice processing on the I/O node.
	SetVoiceProcessingEnabledError(enabled bool) (bool, error)
	// A Boolean value that indicates whether voice processing is in an enabled state.
	VoiceProcessingEnabled() bool
}

An interface definition for the AVAudioIONode class.

Getting the Audio Unit

  • [IAVAudioIONode.AudioUnit]: The node’s underlying audio unit, if any.

Getting the I/O Latency

  • [IAVAudioIONode.PresentationLatency]: The presentation or hardware latency, applicable when rendering to or from an audio device.

Getting and Setting the Voice Processing State

  • [IAVAudioIONode.SetVoiceProcessingEnabledError]: Enables or disables voice processing on the I/O node.
  • [IAVAudioIONode.VoiceProcessingEnabled]: A Boolean value that indicates whether voice processing is in an enabled state.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioIONode

type IAVAudioInputNode 

type IAVAudioInputNode interface {
	IAVAudioIONode
	AVAudio3DMixing
	AVAudioMixing
	AVAudioStereoMixing

	// Supplies the data through the input node to the engine while operating in the manual rendering mode.
	SetManualRenderingInputPCMFormatInputBlock(format IAVAudioFormat, block AVAudioIONodeInputBlock) bool

	// A Boolean that indicates whether the input of the voice processing unit is in a muted state.
	VoiceProcessingInputMuted() bool
	SetVoiceProcessingInputMuted(value bool)
	// A Boolean that indicates whether the node bypasses all microphone uplink processing of the voice-processing unit.
	VoiceProcessingBypassed() bool
	SetVoiceProcessingBypassed(value bool)
	// A Boolean that indicates whether automatic gain control on the processed microphone uplink signal is active.
	VoiceProcessingAGCEnabled() bool
	SetVoiceProcessingAGCEnabled(value bool)
	// The ducking configuration of nonvoice audio.
	VoiceProcessingOtherAudioDuckingConfiguration() AVAudioVoiceProcessingOtherAudioDuckingConfiguration
	SetVoiceProcessingOtherAudioDuckingConfiguration(value AVAudioVoiceProcessingOtherAudioDuckingConfiguration)

	SetMutedSpeechActivityEventListener(listenerBlock AVAudioVoiceProcessingSpeechActivityEventHandler) bool
}

An interface definition for the AVAudioInputNode class.

Manually Giving Data to an Audio Engine

  • [IAVAudioInputNode.SetManualRenderingInputPCMFormatInputBlock]: Supplies the data through the input node to the engine while operating in the manual rendering mode.

Getting and Setting Voice Processing Properties

  • [IAVAudioInputNode.VoiceProcessingInputMuted]: A Boolean that indicates whether the input of the voice processing unit is in a muted state.
  • [IAVAudioInputNode.SetVoiceProcessingInputMuted]
  • [IAVAudioInputNode.VoiceProcessingBypassed]: A Boolean that indicates whether the node bypasses all microphone uplink processing of the voice-processing unit.
  • [IAVAudioInputNode.SetVoiceProcessingBypassed]
  • [IAVAudioInputNode.VoiceProcessingAGCEnabled]: A Boolean that indicates whether automatic gain control on the processed microphone uplink signal is active.
  • [IAVAudioInputNode.SetVoiceProcessingAGCEnabled]
  • [IAVAudioInputNode.VoiceProcessingOtherAudioDuckingConfiguration]: The ducking configuration of nonvoice audio.
  • [IAVAudioInputNode.SetVoiceProcessingOtherAudioDuckingConfiguration]

Handling Muted Speech Events

  • [IAVAudioInputNode.SetMutedSpeechActivityEventListener]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioInputNode

type IAVAudioMixerNode 

type IAVAudioMixerNode interface {
	IAVAudioNode
	AVAudio3DMixing
	AVAudioMixing
	AVAudioStereoMixing

	// The mixer’s output volume.
	OutputVolume() float32
	SetOutputVolume(value float32)

	// An audio bus that isn’t in a connected state.
	NextAvailableInputBus() AVAudioNodeBus
}

An interface definition for the AVAudioMixerNode class.

Getting and Setting the Mixer Volume

  • [IAVAudioMixerNode.OutputVolume]: The mixer’s output volume.
  • [IAVAudioMixerNode.SetOutputVolume]

Getting an Input Bus

  • [IAVAudioMixerNode.NextAvailableInputBus]: An audio bus that isn’t in a connected state.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixerNode

type IAVAudioMixingDestination 

type IAVAudioMixingDestination interface {
	objectivec.IObject
	AVAudio3DMixing
	AVAudioMixing
	AVAudioStereoMixing

	// The underlying mixer connection point.
	ConnectionPoint() IAVAudioConnectionPoint
}

An interface definition for the AVAudioMixingDestination class.

Getting Mixing Destination Properties

  • [IAVAudioMixingDestination.ConnectionPoint]: The underlying mixer connection point.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioMixingDestination

type IAVAudioNode 

type IAVAudioNode interface {
	objectivec.IObject

	// Gets the input format for the bus you specify.
	InputFormatForBus(bus AVAudioNodeBus) IAVAudioFormat
	// Gets the name of the input bus you specify.
	NameForInputBus(bus AVAudioNodeBus) string
	// The number of input busses for the node.
	NumberOfInputs() uint

	// Retrieves the output format for the bus you specify.
	OutputFormatForBus(bus AVAudioNodeBus) IAVAudioFormat
	// Retrieves the name of the output bus you specify.
	NameForOutputBus(bus AVAudioNodeBus) string
	// The number of output busses for the node.
	NumberOfOutputs() uint

	// Installs an audio tap on a bus you specify to record, monitor, and observe the output of the node.
	InstallTapOnBusBufferSizeFormatBlock(bus AVAudioNodeBus, bufferSize AVAudioFrameCount, format IAVAudioFormat, tapBlock AVAudioNodeTapBlock)
	// Removes an audio tap on a bus you specify.
	RemoveTapOnBus(bus AVAudioNodeBus)

	// The audio engine that manages the node, if any.
	Engine() IAVAudioEngine

	// The most recent render time.
	LastRenderTime() IAVAudioTime

	// An audio unit object that wraps or underlies the implementation’s audio unit.
	AUAudioUnit() objectivec.IObject
	// The processing latency of the node, in seconds.
	Latency() float64
	// The maximum render pipeline latency downstream of the node, in seconds.
	OutputPresentationLatency() float64

	// Clears a unit’s previous processing state.
	Reset()
}

An interface definition for the AVAudioNode class.

Configuring an Input Format Bus

  • [IAVAudioNode.InputFormatForBus]: Gets the input format for the bus you specify.
  • [IAVAudioNode.NameForInputBus]: Gets the name of the input bus you specify.
  • [IAVAudioNode.NumberOfInputs]: The number of input busses for the node.

Creating an Output Format Bus

  • [IAVAudioNode.OutputFormatForBus]: Retrieves the output format for the bus you specify.
  • [IAVAudioNode.NameForOutputBus]: Retrieves the name of the output bus you specify.
  • [IAVAudioNode.NumberOfOutputs]: The number of output busses for the node.

Installing and Removing an Audio Tap

  • [IAVAudioNode.InstallTapOnBusBufferSizeFormatBlock]: Installs an audio tap on a bus you specify to record, monitor, and observe the output of the node.
  • [IAVAudioNode.RemoveTapOnBus]: Removes an audio tap on a bus you specify.

Getting the Audio Engine for the Node

  • [IAVAudioNode.Engine]: The audio engine that manages the node, if any.

Getting the Latest Node Render Time

  • [IAVAudioNode.LastRenderTime]: The most recent render time.

Getting Audio Node Properties

  • [IAVAudioNode.AUAudioUnit]: An audio unit object that wraps or underlies the implementation’s audio unit.
  • [IAVAudioNode.Latency]: The processing latency of the node, in seconds.
  • [IAVAudioNode.OutputPresentationLatency]: The maximum render pipeline latency downstream of the node, in seconds.

Resetting the Audio Node

  • [IAVAudioNode.Reset]: Clears a unit’s previous processing state.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioNode

type IAVAudioOutputNode 

type IAVAudioOutputNode interface {
	IAVAudioIONode

	// The render format of the engine in manual rendering mode.
	ManualRenderingFormat() IAVAudioFormat
	SetManualRenderingFormat(value IAVAudioFormat)
}

An interface definition for the AVAudioOutputNode class.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioOutputNode

type IAVAudioPCMBuffer 

type IAVAudioPCMBuffer interface {
	IAVAudioBuffer

	// Creates a PCM audio buffer instance for PCM audio data.
	InitWithPCMFormatFrameCapacity(format IAVAudioFormat, frameCapacity AVAudioFrameCount) AVAudioPCMBuffer
	// Creates a PCM audio buffer instance without copying samples, for PCM audio data, with a specified buffer list and a deallocator closure.
	InitWithPCMFormatBufferListNoCopyDeallocator(format IAVAudioFormat, bufferList objectivec.IObject, deallocator constAudioBufferListHandler) AVAudioPCMBuffer

	// The current number of valid sample frames in the buffer.
	FrameLength() AVAudioFrameCount
	SetFrameLength(value AVAudioFrameCount)

	// The buffer’s audio samples as floating point values.
	FloatChannelData() unsafe.Pointer
	// The buffer’s capacity, in audio sample frames.
	FrameCapacity() AVAudioFrameCount
	// The buffer’s 16-bit integer audio samples.
	Int16ChannelData() unsafe.Pointer
	// The buffer’s 32-bit integer audio samples.
	Int32ChannelData() unsafe.Pointer
	// The buffer’s number of interleaved channels.
	Stride() uint
}

An interface definition for the AVAudioPCMBuffer class.

Creating a PCM Audio Buffer

  • [IAVAudioPCMBuffer.InitWithPCMFormatFrameCapacity]: Creates a PCM audio buffer instance for PCM audio data.
  • [IAVAudioPCMBuffer.InitWithPCMFormatBufferListNoCopyDeallocator]: Creates a PCM audio buffer instance without copying samples, for PCM audio data, with a specified buffer list and a deallocator closure.

Getting and Setting the Frame Length

  • [IAVAudioPCMBuffer.FrameLength]: The current number of valid sample frames in the buffer.
  • [IAVAudioPCMBuffer.SetFrameLength]

Accessing PCM Buffer Data

  • [IAVAudioPCMBuffer.FloatChannelData]: The buffer’s audio samples as floating point values.
  • [IAVAudioPCMBuffer.FrameCapacity]: The buffer’s capacity, in audio sample frames.
  • [IAVAudioPCMBuffer.Int16ChannelData]: The buffer’s 16-bit integer audio samples.
  • [IAVAudioPCMBuffer.Int32ChannelData]: The buffer’s 32-bit integer audio samples.
  • [IAVAudioPCMBuffer.Stride]: The buffer’s number of interleaved channels.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPCMBuffer

type IAVAudioPlayer 

type IAVAudioPlayer interface {
	objectivec.IObject

	// Creates a player to play audio from a file.
	InitWithContentsOfURLError(url foundation.INSURL) (AVAudioPlayer, error)
	// Creates a player to play audio from a file of a particular type.
	InitWithContentsOfURLFileTypeHintError(url foundation.INSURL, utiString string) (AVAudioPlayer, error)
	// Creates a player to play in-memory audio data.
	InitWithDataError(data foundation.INSData) (AVAudioPlayer, error)
	// Creates a player to play in-memory audio data of a particular type.
	InitWithDataFileTypeHintError(data foundation.INSData, utiString string) (AVAudioPlayer, error)

	// Prepares the player for audio playback.
	PrepareToPlay() bool
	// Plays audio asynchronously.
	Play() bool
	// Plays audio asynchronously, starting at a specified point in the audio output device’s timeline.
	PlayAtTime(time float64) bool
	// Pauses audio playback.
	Pause()
	// Stops playback and undoes the setup the system requires for playback.
	Stop()
	// A Boolean value that indicates whether the player is currently playing audio.
	Playing() bool

	// The audio player’s volume relative to other audio output.
	Volume() float32
	SetVolume(value float32)
	// Changes the audio player’s volume over a duration of time.
	SetVolumeFadeDuration(volume float32, duration float64)
	// The audio player’s stereo pan position.
	Pan() float32
	SetPan(value float32)
	// A Boolean value that indicates whether you can adjust the playback rate of the audio player.
	EnableRate() bool
	SetEnableRate(value bool)
	// The audio player’s playback rate.
	Rate() float32
	SetRate(value float32)
	// The number of times the audio repeats playback.
	NumberOfLoops() int
	SetNumberOfLoops(value int)

	// The current playback time, in seconds, within the audio timeline.
	CurrentTime() float64
	SetCurrentTime(value float64)
	// The total duration, in seconds, of the player’s audio.
	Duration() float64

	// The number of audio channels in the player’s audio.
	NumberOfChannels() uint

	// A Boolean value that indicates whether the player is able to generate audio-level metering data.
	MeteringEnabled() bool
	SetMeteringEnabled(value bool)
	// Refreshes the average and peak power values for all channels of an audio player.
	UpdateMeters()
	// Returns the average power, in decibels full-scale (dBFS), for an audio channel.
	AveragePowerForChannel(channelNumber uint) float32
	// Returns the peak power, in decibels full-scale (dBFS), for an audio channel.
	PeakPowerForChannel(channelNumber uint) float32

	// The delegate object for the audio player.
	Delegate() AVAudioPlayerDelegate
	SetDelegate(value AVAudioPlayerDelegate)

	// The URL of the audio file.
	Url() foundation.INSURL
	// The audio data associated with the player.
	Data() foundation.INSData
	// The format of the player’s audio data.
	Format() IAVAudioFormat
	// A dictionary that provides information about the player’s audio data.
	Settings() foundation.INSDictionary

	// The unique identifier of the current audio player.
	CurrentDevice() string
	SetCurrentDevice(value string)
	// The time value, in seconds, of the audio output device’s clock.
	DeviceCurrentTime() float64
}

An interface definition for the AVAudioPlayer class.

Creating an audio player

  • [IAVAudioPlayer.InitWithContentsOfURLError]: Creates a player to play audio from a file.
  • [IAVAudioPlayer.InitWithContentsOfURLFileTypeHintError]: Creates a player to play audio from a file of a particular type.
  • [IAVAudioPlayer.InitWithDataError]: Creates a player to play in-memory audio data.
  • [IAVAudioPlayer.InitWithDataFileTypeHintError]: Creates a player to play in-memory audio data of a particular type.

Controlling playback

  • [IAVAudioPlayer.PrepareToPlay]: Prepares the player for audio playback.
  • [IAVAudioPlayer.Play]: Plays audio asynchronously.
  • [IAVAudioPlayer.PlayAtTime]: Plays audio asynchronously, starting at a specified point in the audio output device’s timeline.
  • [IAVAudioPlayer.Pause]: Pauses audio playback.
  • [IAVAudioPlayer.Stop]: Stops playback and undoes the setup the system requires for playback.
  • [IAVAudioPlayer.Playing]: A Boolean value that indicates whether the player is currently playing audio.

Configuring playback settings

  • [IAVAudioPlayer.Volume]: The audio player’s volume relative to other audio output.
  • [IAVAudioPlayer.SetVolume]
  • [IAVAudioPlayer.SetVolumeFadeDuration]: Changes the audio player’s volume over a duration of time.
  • [IAVAudioPlayer.Pan]: The audio player’s stereo pan position.
  • [IAVAudioPlayer.SetPan]
  • [IAVAudioPlayer.EnableRate]: A Boolean value that indicates whether you can adjust the playback rate of the audio player.
  • [IAVAudioPlayer.SetEnableRate]
  • [IAVAudioPlayer.Rate]: The audio player’s playback rate.
  • [IAVAudioPlayer.SetRate]
  • [IAVAudioPlayer.NumberOfLoops]: The number of times the audio repeats playback.
  • [IAVAudioPlayer.SetNumberOfLoops]

Accessing player timing

  • [IAVAudioPlayer.CurrentTime]: The current playback time, in seconds, within the audio timeline.
  • [IAVAudioPlayer.SetCurrentTime]
  • [IAVAudioPlayer.Duration]: The total duration, in seconds, of the player’s audio.

Managing audio channels

  • [IAVAudioPlayer.NumberOfChannels]: The number of audio channels in the player’s audio.

Managing audio-level metering

  • [IAVAudioPlayer.MeteringEnabled]: A Boolean value that indicates whether the player is able to generate audio-level metering data.
  • [IAVAudioPlayer.SetMeteringEnabled]
  • [IAVAudioPlayer.UpdateMeters]: Refreshes the average and peak power values for all channels of an audio player.
  • [IAVAudioPlayer.AveragePowerForChannel]: Returns the average power, in decibels full-scale (dBFS), for an audio channel.
  • [IAVAudioPlayer.PeakPowerForChannel]: Returns the peak power, in decibels full-scale (dBFS), for an audio channel.

Responding to player events

  • [IAVAudioPlayer.Delegate]: The delegate object for the audio player.
  • [IAVAudioPlayer.SetDelegate]

Inspecting the audio data

  • [IAVAudioPlayer.Url]: The URL of the audio file.
  • [IAVAudioPlayer.Data]: The audio data associated with the player.
  • [IAVAudioPlayer.Format]: The format of the player’s audio data.
  • [IAVAudioPlayer.Settings]: A dictionary that provides information about the player’s audio data.

Accessing device information

  • [IAVAudioPlayer.CurrentDevice]: The unique identifier of the current audio player.
  • [IAVAudioPlayer.SetCurrentDevice]
  • [IAVAudioPlayer.DeviceCurrentTime]: The time value, in seconds, of the audio output device’s clock.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayer

type IAVAudioPlayerNode 

type IAVAudioPlayerNode interface {
	IAVAudioNode
	AVAudio3DMixing
	AVAudioMixing
	AVAudioStereoMixing

	// Schedules the playing of an entire audio file.
	ScheduleFileAtTimeCompletionHandler(file IAVAudioFile, when IAVAudioTime, completionHandler ErrorHandler)
	// Schedules the playing of an entire audio file with a callback option you specify.
	ScheduleFileAtTimeCompletionCallbackTypeCompletionHandler(file IAVAudioFile, when IAVAudioTime, callbackType AVAudioPlayerNodeCompletionCallbackType, completionHandler ErrorHandler)
	// Schedules the playing of an audio file segment.
	ScheduleSegmentStartingFrameFrameCountAtTimeCompletionHandler(file IAVAudioFile, startFrame AVAudioFramePosition, numberFrames AVAudioFrameCount, when IAVAudioTime, completionHandler ErrorHandler)
	// Schedules the playing of an audio file segment with a callback option you specify.
	ScheduleSegmentStartingFrameFrameCountAtTimeCompletionCallbackTypeCompletionHandler(file IAVAudioFile, startFrame AVAudioFramePosition, numberFrames AVAudioFrameCount, when IAVAudioTime, callbackType AVAudioPlayerNodeCompletionCallbackType, completionHandler ErrorHandler)
	// Schedules the playing samples from an audio buffer at the time and playback options you specify.
	ScheduleBufferAtTimeOptionsCompletionHandler(buffer IAVAudioPCMBuffer, when IAVAudioTime, options AVAudioPlayerNodeBufferOptions, completionHandler ErrorHandler)
	// Schedules the playing samples from an audio buffer.
	ScheduleBufferCompletionHandler(buffer IAVAudioPCMBuffer, completionHandler ErrorHandler)
	// Schedules the playing samples from an audio buffer with the playback options you specify.
	ScheduleBufferAtTimeOptionsCompletionCallbackTypeCompletionHandler(buffer IAVAudioPCMBuffer, when IAVAudioTime, options AVAudioPlayerNodeBufferOptions, callbackType AVAudioPlayerNodeCompletionCallbackType, completionHandler ErrorHandler)
	// Schedules the playing samples from an audio buffer with the callback option you specify.
	ScheduleBufferCompletionCallbackTypeCompletionHandler(buffer IAVAudioPCMBuffer, callbackType AVAudioPlayerNodeCompletionCallbackType, completionHandler ErrorHandler)

	// Converts from player time to node time.
	NodeTimeForPlayerTime(playerTime IAVAudioTime) IAVAudioTime
	// Converts from node time to player time.
	PlayerTimeForNodeTime(nodeTime IAVAudioTime) IAVAudioTime

	// Prepares the file regions or buffers you schedule for playback.
	PrepareWithFrameCount(frameCount AVAudioFrameCount)
	// Starts or resumes playback immediately.
	Play()
	// Starts or resumes playback at a time you specify.
	PlayAtTime(when IAVAudioTime)
	// A Boolean value that indicates whether the player is playing.
	Playing() bool
	// Pauses the node’s playback.
	Pause()
	// Clears all of the node’s events you schedule and stops playback.
	Stop()
}

An interface definition for the AVAudioPlayerNode class.

Scheduling Playback

  • [IAVAudioPlayerNode.ScheduleFileAtTimeCompletionHandler]: Schedules the playing of an entire audio file.
  • [IAVAudioPlayerNode.ScheduleFileAtTimeCompletionCallbackTypeCompletionHandler]: Schedules the playing of an entire audio file with a callback option you specify.
  • [IAVAudioPlayerNode.ScheduleSegmentStartingFrameFrameCountAtTimeCompletionHandler]: Schedules the playing of an audio file segment.
  • [IAVAudioPlayerNode.ScheduleSegmentStartingFrameFrameCountAtTimeCompletionCallbackTypeCompletionHandler]: Schedules the playing of an audio file segment with a callback option you specify.
  • [IAVAudioPlayerNode.ScheduleBufferAtTimeOptionsCompletionHandler]: Schedules the playing samples from an audio buffer at the time and playback options you specify.
  • [IAVAudioPlayerNode.ScheduleBufferCompletionHandler]: Schedules the playing samples from an audio buffer.
  • [IAVAudioPlayerNode.ScheduleBufferAtTimeOptionsCompletionCallbackTypeCompletionHandler]: Schedules the playing samples from an audio buffer with the playback options you specify.
  • [IAVAudioPlayerNode.ScheduleBufferCompletionCallbackTypeCompletionHandler]: Schedules the playing samples from an audio buffer with the callback option you specify.

Converting Node and Player Times

  • [IAVAudioPlayerNode.NodeTimeForPlayerTime]: Converts from player time to node time.
  • [IAVAudioPlayerNode.PlayerTimeForNodeTime]: Converts from node time to player time.

Controlling Playback

  • [IAVAudioPlayerNode.PrepareWithFrameCount]: Prepares the file regions or buffers you schedule for playback.
  • [IAVAudioPlayerNode.Play]: Starts or resumes playback immediately.
  • [IAVAudioPlayerNode.PlayAtTime]: Starts or resumes playback at a time you specify.
  • [IAVAudioPlayerNode.Playing]: A Boolean value that indicates whether the player is playing.
  • [IAVAudioPlayerNode.Pause]: Pauses the node’s playback.
  • [IAVAudioPlayerNode.Stop]: Clears all of the node’s events you schedule and stops playback.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioPlayerNode

type IAVAudioRecorder 

type IAVAudioRecorder interface {
	objectivec.IObject

	// Creates an audio recorder with settings.
	InitWithURLSettingsError(url foundation.INSURL, settings foundation.INSDictionary) (AVAudioRecorder, error)
	// Creates an audio recorder with an audio format.
	InitWithURLFormatError(url foundation.INSURL, format IAVAudioFormat) (AVAudioRecorder, error)

	// Creates an audio file and prepares the system for recording.
	PrepareToRecord() bool
	// Records audio starting at a specific time.
	RecordAtTime(time float64) bool
	// Records audio for the indicated duration of time.
	RecordForDuration(duration float64) bool
	// Records audio starting at a specific time for the indicated duration.
	RecordAtTimeForDuration(time float64, duration float64) bool
	// Pauses an audio recording.
	Pause()
	// Stops recording and closes the audio file.
	Stop()
	// A Boolean value that indicates whether the audio recorder is recording.
	Recording() bool
	// Deletes a recorded audio file.
	DeleteRecording() bool

	// The time, in seconds, since the beginning of the recording.
	CurrentTime() float64
	// The time, in seconds, of the host audio device.
	DeviceCurrentTime() float64

	// A Boolean value that indicates whether you’ve enabled the recorder to generate audio-level metering data.
	MeteringEnabled() bool
	SetMeteringEnabled(value bool)
	// Refreshes the average and peak power values for all channels of an audio recorder.
	UpdateMeters()
	// Returns the average power, in decibels full-scale (dBFS), for an audio channel.
	AveragePowerForChannel(channelNumber uint) float32
	// Returns the peak power, in decibels full-scale (dBFS), for an audio channel.
	PeakPowerForChannel(channelNumber uint) float32

	// The delegate object for the audio recorder.
	Delegate() AVAudioRecorderDelegate
	SetDelegate(value AVAudioRecorderDelegate)

	// The URL to which the recorder writes its data.
	Url() foundation.INSURL
	// The format of the recorded audio.
	Format() IAVAudioFormat
	// The settings that describe the format of the recorded audio.
	Settings() foundation.INSDictionary

	// The category for recording (input) and playback (output) of audio, such as for a Voice over Internet Protocol (VoIP) app.
	PlayAndRecord() objc.ID
	// The category for recording audio while also silencing playback audio.
	Record() objc.ID
}

An interface definition for the AVAudioRecorder class.

Creating an audio recorder

  • [IAVAudioRecorder.InitWithURLSettingsError]: Creates an audio recorder with settings.
  • [IAVAudioRecorder.InitWithURLFormatError]: Creates an audio recorder with an audio format.

Controlling recording

  • [IAVAudioRecorder.PrepareToRecord]: Creates an audio file and prepares the system for recording.
  • [IAVAudioRecorder.RecordAtTime]: Records audio starting at a specific time.
  • [IAVAudioRecorder.RecordForDuration]: Records audio for the indicated duration of time.
  • [IAVAudioRecorder.RecordAtTimeForDuration]: Records audio starting at a specific time for the indicated duration.
  • [IAVAudioRecorder.Pause]: Pauses an audio recording.
  • [IAVAudioRecorder.Stop]: Stops recording and closes the audio file.
  • [IAVAudioRecorder.Recording]: A Boolean value that indicates whether the audio recorder is recording.
  • [IAVAudioRecorder.DeleteRecording]: Deletes a recorded audio file.

Accessing recorder timing

  • [IAVAudioRecorder.CurrentTime]: The time, in seconds, since the beginning of the recording.
  • [IAVAudioRecorder.DeviceCurrentTime]: The time, in seconds, of the host audio device.

Managing audio-level metering

  • [IAVAudioRecorder.MeteringEnabled]: A Boolean value that indicates whether you’ve enabled the recorder to generate audio-level metering data.
  • [IAVAudioRecorder.SetMeteringEnabled]
  • [IAVAudioRecorder.UpdateMeters]: Refreshes the average and peak power values for all channels of an audio recorder.
  • [IAVAudioRecorder.AveragePowerForChannel]: Returns the average power, in decibels full-scale (dBFS), for an audio channel.
  • [IAVAudioRecorder.PeakPowerForChannel]: Returns the peak power, in decibels full-scale (dBFS), for an audio channel.

Responding to recorder events

  • [IAVAudioRecorder.Delegate]: The delegate object for the audio recorder.
  • [IAVAudioRecorder.SetDelegate]

Inspecting the audio data

  • [IAVAudioRecorder.Url]: The URL to which the recorder writes its data.
  • [IAVAudioRecorder.Format]: The format of the recorded audio.
  • [IAVAudioRecorder.Settings]: The settings that describe the format of the recorded audio.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRecorder

type IAVAudioRoutingArbiter 

type IAVAudioRoutingArbiter interface {
	objectivec.IObject

	// Begins routing arbitration to take ownership of a nearby Bluetooth audio route.
	BeginArbitrationWithCategoryCompletionHandler(category AVAudioRoutingArbitrationCategory, handler BoolErrorHandler)
	// Stops an app’s participation in audio routing arbitration.
	LeaveArbitration()
}

An interface definition for the AVAudioRoutingArbiter class.

Participating in AirPods Automatic Switching

  • [IAVAudioRoutingArbiter.BeginArbitrationWithCategoryCompletionHandler]: Begins routing arbitration to take ownership of a nearby Bluetooth audio route.
  • [IAVAudioRoutingArbiter.LeaveArbitration]: Stops an app’s participation in audio routing arbitration.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioRoutingArbiter

type IAVAudioSequencer 

type IAVAudioSequencer interface {
	objectivec.IObject

	// Creates an audio sequencer that the framework attaches to an audio engine instance.
	InitWithAudioEngine(engine IAVAudioEngine) AVAudioSequencer

	// Creates and writes a MIDI file from the events in the sequence.
	WriteToURLSMPTEResolutionReplaceExistingError(fileURL foundation.INSURL, resolution int, replace bool) (bool, error)

	// Creates a new music track and appends it to the sequencer’s list.
	CreateAndAppendTrack() IAVMusicTrack
	// Reverses the order of all events in all music tracks, including the tempo track.
	ReverseEvents()
	// Removes the music track from the sequencer.
	RemoveTrack(track IAVMusicTrack) bool

	// Parses the data and adds its events to the sequence.
	LoadFromDataOptionsError(data foundation.INSData, options AVMusicSequenceLoadOptions) (bool, error)
	// Loads the file the URL references and adds the events to the sequence.
	LoadFromURLOptionsError(fileURL foundation.INSURL, options AVMusicSequenceLoadOptions) (bool, error)

	// Gets ready to play the sequence by prerolling all events.
	PrepareToPlay()
	// Starts the sequencer’s player.
	StartAndReturnError() (bool, error)
	// Stops the sequencer’s player.
	Stop()

	// Gets the host time the sequence plays at the specified position.
	HostTimeForBeatsError(inBeats AVMusicTimeStamp) (uint64, error)
	// Gets the time for the specified beat position (timestamp) in the track, in seconds.
	SecondsForBeats(beats AVMusicTimeStamp) float64

	// Gets the beat the system plays at the specified host time.
	BeatsForHostTimeError(inHostTime uint64) (AVMusicTimeStamp, error)
	// Gets the beat position (timestamp) for the specified time in the track.
	BeatsForSeconds(seconds float64) AVMusicTimeStamp
	// A timestamp you use to access all events in a music track through a beat range.
	AVMusicTimeStampEndOfTrack() float64
	SetAVMusicTimeStampEndOfTrack(value float64)

	// Adds a callback that the sequencer calls each time it encounters a user event during playback.
	SetUserCallback(userCallback AVAudioSequencerUserCallback)

	// A Boolean value that indicates whether the sequencer’s player is in a playing state.
	Playing() bool
	// The playback rate of the sequencer’s player.
	Rate() float32
	SetRate(value float32)
	// An array that contains all the tracks in the sequence.
	Tracks() []AVMusicTrack
	// The current playback position, in beats.
	CurrentPositionInBeats() float64
	SetCurrentPositionInBeats(value float64)
	// The current playback position, in seconds.
	CurrentPositionInSeconds() float64
	SetCurrentPositionInSeconds(value float64)
	// The track that contains tempo information about the sequence.
	TempoTrack() IAVMusicTrack
	// A dictionary that contains metadata from a sequence.
	UserInfo() foundation.INSDictionary
	// Gets a data object that contains the events from the sequence.
	DataWithSMPTEResolutionError(SMPTEResolution int) (foundation.INSData, error)
}

An interface definition for the AVAudioSequencer class.

Creating an Audio Sequencer

  • [IAVAudioSequencer.InitWithAudioEngine]: Creates an audio sequencer that the framework attaches to an audio engine instance.

Writing to a MIDI File

  • [IAVAudioSequencer.WriteToURLSMPTEResolutionReplaceExistingError]: Creates and writes a MIDI file from the events in the sequence.

Handling Music Tracks

  • [IAVAudioSequencer.CreateAndAppendTrack]: Creates a new music track and appends it to the sequencer’s list.
  • [IAVAudioSequencer.ReverseEvents]: Reverses the order of all events in all music tracks, including the tempo track.
  • [IAVAudioSequencer.RemoveTrack]: Removes the music track from the sequencer.

Managing Sequence Load Options

  • [IAVAudioSequencer.LoadFromDataOptionsError]: Parses the data and adds its events to the sequence.
  • [IAVAudioSequencer.LoadFromURLOptionsError]: Loads the file the URL references and adds the events to the sequence.

Operating an Audio Sequencer

  • [IAVAudioSequencer.PrepareToPlay]: Gets ready to play the sequence by prerolling all events.
  • [IAVAudioSequencer.StartAndReturnError]: Starts the sequencer’s player.
  • [IAVAudioSequencer.Stop]: Stops the sequencer’s player.

Managing Time Stamps

  • [IAVAudioSequencer.HostTimeForBeatsError]: Gets the host time the sequence plays at the specified position.
  • [IAVAudioSequencer.SecondsForBeats]: Gets the time for the specified beat position (timestamp) in the track, in seconds.

Handling Beat Range

  • [IAVAudioSequencer.BeatsForHostTimeError]: Gets the beat the system plays at the specified host time.
  • [IAVAudioSequencer.BeatsForSeconds]: Gets the beat position (timestamp) for the specified time in the track.
  • [IAVAudioSequencer.AVMusicTimeStampEndOfTrack]: A timestamp you use to access all events in a music track through a beat range.
  • [IAVAudioSequencer.SetAVMusicTimeStampEndOfTrack]

Setting the User Callback

  • [IAVAudioSequencer.SetUserCallback]: Adds a callback that the sequencer calls each time it encounters a user event during playback.

Getting Sequence Properties

  • [IAVAudioSequencer.Playing]: A Boolean value that indicates whether the sequencer’s player is in a playing state.
  • [IAVAudioSequencer.Rate]: The playback rate of the sequencer’s player.
  • [IAVAudioSequencer.SetRate]
  • [IAVAudioSequencer.Tracks]: An array that contains all the tracks in the sequence.
  • [IAVAudioSequencer.CurrentPositionInBeats]: The current playback position, in beats.
  • [IAVAudioSequencer.SetCurrentPositionInBeats]
  • [IAVAudioSequencer.CurrentPositionInSeconds]: The current playback position, in seconds.
  • [IAVAudioSequencer.SetCurrentPositionInSeconds]
  • [IAVAudioSequencer.TempoTrack]: The track that contains tempo information about the sequence.
  • [IAVAudioSequencer.UserInfo]: A dictionary that contains metadata from a sequence.
  • [IAVAudioSequencer.DataWithSMPTEResolutionError]: Gets a data object that contains the events from the sequence.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSequencer

type IAVAudioSessionCapability 

type IAVAudioSessionCapability interface {
	objectivec.IObject

	// A Boolean value that indicates whether the capability is enabled.
	Enabled() bool
	// A Boolean value that indicates whether the capability is supported.
	Supported() bool

	// An optional port extension that describes capabilities relevant to Bluetooth microphone ports.
	BluetoothMicrophoneExtension() objc.ID
	SetBluetoothMicrophoneExtension(value objc.ID)
}

An interface definition for the AVAudioSessionCapability class.

Inspecting a capability

  • [IAVAudioSessionCapability.Enabled]: A Boolean value that indicates whether the capability is enabled.
  • [IAVAudioSessionCapability.Supported]: A Boolean value that indicates whether the capability is supported.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSessionCapability

type IAVAudioSinkNode 

type IAVAudioSinkNode interface {
	IAVAudioNode

	// Creates an audio sink node with a block that receives audio data.
	InitWithReceiverBlock(block AVAudioSinkNodeReceiverBlock) AVAudioSinkNode
}

An interface definition for the AVAudioSinkNode class.

Creating an Audio Sink Node

  • [IAVAudioSinkNode.InitWithReceiverBlock]: Creates an audio sink node with a block that receives audio data.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSinkNode

type IAVAudioSourceNode 

type IAVAudioSourceNode interface {
	IAVAudioNode
	AVAudio3DMixing
	AVAudioMixing
	AVAudioStereoMixing

	// Creates an audio source node with a block that supplies audio data.
	InitWithRenderBlock(block AVAudioSourceNodeRenderBlock) AVAudioSourceNode
	// Creates an audio source node with the audio format and a block that supplies audio data.
	InitWithFormatRenderBlock(format IAVAudioFormat, block AVAudioSourceNodeRenderBlock) AVAudioSourceNode
}

An interface definition for the AVAudioSourceNode class.

Creating an Audio Source Node

  • [IAVAudioSourceNode.InitWithRenderBlock]: Creates an audio source node with a block that supplies audio data.
  • [IAVAudioSourceNode.InitWithFormatRenderBlock]: Creates an audio source node with the audio format and a block that supplies audio data.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioSourceNode

type IAVAudioTime 

type IAVAudioTime interface {
	objectivec.IObject

	// Creates an audio time object with the specified timestamp and sample rate.
	InitWithAudioTimeStampSampleRate(ts objectivec.IObject, sampleRate float64) AVAudioTime
	// Creates an audio time object with the specified host time.
	InitWithHostTime(hostTime uint64) AVAudioTime
	// Creates an audio time object with the specified host time, sample time, and sample rate.
	InitWithHostTimeSampleTimeAtRate(hostTime uint64, sampleTime AVAudioFramePosition, sampleRate float64) AVAudioTime
	// Creates an audio time object with the specified timestamp and sample rate.
	InitWithSampleTimeAtRate(sampleTime AVAudioFramePosition, sampleRate float64) AVAudioTime
	// Creates an audio time object by converting between host time and sample time.
	ExtrapolateTimeFromAnchor(anchorTime IAVAudioTime) IAVAudioTime

	// The host time.
	HostTime() uint64
	// A Boolean value that indicates whether the host time value is valid.
	HostTimeValid() bool

	// The sampling rate that the sample time property expresses.
	SampleRate() float64
	// The time as a number of audio samples that the current audio device tracks.
	SampleTime() AVAudioFramePosition
	// A Boolean value that indicates whether the sample time and sample rate properties are in a valid state.
	SampleTimeValid() bool

	// The time as an audio timestamp.
	AudioTimeStamp() objectivec.IObject
}

An interface definition for the AVAudioTime class.

Creating an Audio Time Instance

  • [IAVAudioTime.InitWithAudioTimeStampSampleRate]: Creates an audio time object with the specified timestamp and sample rate.
  • [IAVAudioTime.InitWithHostTime]: Creates an audio time object with the specified host time.
  • [IAVAudioTime.InitWithHostTimeSampleTimeAtRate]: Creates an audio time object with the specified host time, sample time, and sample rate.
  • [IAVAudioTime.InitWithSampleTimeAtRate]: Creates an audio time object with the specified timestamp and sample rate.
  • [IAVAudioTime.ExtrapolateTimeFromAnchor]: Creates an audio time object by converting between host time and sample time.

Manipulating Host Time

  • [IAVAudioTime.HostTime]: The host time.
  • [IAVAudioTime.HostTimeValid]: A Boolean value that indicates whether the host time value is valid.

Getting Sample Rate Information

  • [IAVAudioTime.SampleRate]: The sampling rate that the sample time property expresses.
  • [IAVAudioTime.SampleTime]: The time as a number of audio samples that the current audio device tracks.
  • [IAVAudioTime.SampleTimeValid]: A Boolean value that indicates whether the sample time and sample rate properties are in a valid state.

Getting the Core Audio Time Stamp

  • [IAVAudioTime.AudioTimeStamp]: The time as an audio timestamp.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioTime

type IAVAudioUnit 

type IAVAudioUnit interface {
	IAVAudioNode

	// The underlying Core Audio audio unit.
	AudioUnit() IAVAudioUnit

	// Loads an audio unit using a specified preset.
	LoadAudioUnitPresetAtURLError(url foundation.INSURL) (bool, error)

	// The audio component description that represents the underlying Core Audio audio unit.
	AudioComponentDescription() objectivec.IObject
	// The name of the manufacturer of the audio unit.
	ManufacturerName() string
	// The name of the audio unit.
	Name() string
	// The version number of the audio unit.
	Version() uint
}

An interface definition for the AVAudioUnit class.

Getting the Core Audio audio unit

  • [IAVAudioUnit.AudioUnit]: The underlying Core Audio audio unit.

Loading an audio preset file

  • [IAVAudioUnit.LoadAudioUnitPresetAtURLError]: Loads an audio unit using a specified preset.

Getting audio unit values

  • [IAVAudioUnit.AudioComponentDescription]: The audio component description that represents the underlying Core Audio audio unit.
  • [IAVAudioUnit.ManufacturerName]: The name of the manufacturer of the audio unit.
  • [IAVAudioUnit.Name]: The name of the audio unit.
  • [IAVAudioUnit.Version]: The version number of the audio unit.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnit

type IAVAudioUnitComponent 

type IAVAudioUnitComponent interface {
	objectivec.IObject

	// The underlying audio component.
	AudioComponent() objectivec.IObject

	// The audio component description.
	AudioComponentDescription() objectivec.IObject
	// An array of architectures that the audio unit supports.
	AvailableArchitectures() []foundation.NSNumber
	// The audio unit component’s configuration dictionary.
	ConfigurationDictionary() foundation.INSDictionary
	// A Boolean value that indicates whether the audio unit component has a custom view.
	HasCustomView() bool
	// A Boolean value that indicates whether the audio unit component has MIDI input.
	HasMIDIInput() bool
	// A Boolean value that indicates whether the audio unit component has MIDI output.
	HasMIDIOutput() bool
	// The name of the manufacturer of the audio unit component.
	ManufacturerName() string
	// The name of the audio unit component.
	Name() string
	// A Boolean value that indicates whether the audio unit component passes the validation tests.
	PassesAUVal() bool
	// A Boolean value that indicates whether the audio unit component is safe for sandboxing.
	SandboxSafe() bool
	// Gets a Boolean value that indicates whether the audio unit component supports the specified number of input and output channels.
	SupportsNumberInputChannelsOutputChannels(numInputChannels int, numOutputChannels int) bool
	// The audio unit component type.
	TypeName() string
	// The audio unit component version number.
	Version() uint
	// A string that represents the audio unit component version number.
	VersionString() string

	// The URL of an icon that represents the audio unit component.
	IconURL() foundation.INSURL
	// An icon that represents the component.
	Icon() objc.ID
	// The localized type name of the component.
	LocalizedTypeName() string
	// An array of tag names for the audio unit component.
	AllTagNames() []string
	// An array of tags the user creates.
	UserTagNames() []string
	SetUserTagNames(value []string)

	// The audio unit manufacturer is Apple.
	AVAudioUnitManufacturerNameApple() string

	// An audio unit type that represents an output.
	AVAudioUnitTypeOutput() string
	// An audio unit type that represents a music device.
	AVAudioUnitTypeMusicDevice() string
	// An audio unit type that represents a music effect.
	AVAudioUnitTypeMusicEffect() string
	// An audio unit type that represents a format converter.
	AVAudioUnitTypeFormatConverter() string
	// An audio unit type that represents an effect.
	AVAudioUnitTypeEffect() string
	// An audio unit type that represents a mixer.
	AVAudioUnitTypeMixer() string
	// An audio unit type that represents a panner.
	AVAudioUnitTypePanner() string
	// An audio unit type that represents a generator.
	AVAudioUnitTypeGenerator() string
	// An audio unit type that represents an offline effect.
	AVAudioUnitTypeOfflineEffect() string
	// An audio unit type that represents a MIDI processor.
	AVAudioUnitTypeMIDIProcessor() string
}

An interface definition for the AVAudioUnitComponent class.

Getting the audio unit component’s audio unit

  • [IAVAudioUnitComponent.AudioComponent]: The underlying audio component.

Getting audio unit component information

  • [IAVAudioUnitComponent.AudioComponentDescription]: The audio component description.
  • [IAVAudioUnitComponent.AvailableArchitectures]: An array of architectures that the audio unit supports.
  • [IAVAudioUnitComponent.ConfigurationDictionary]: The audio unit component’s configuration dictionary.
  • [IAVAudioUnitComponent.HasCustomView]: A Boolean value that indicates whether the audio unit component has a custom view.
  • [IAVAudioUnitComponent.HasMIDIInput]: A Boolean value that indicates whether the audio unit component has MIDI input.
  • [IAVAudioUnitComponent.HasMIDIOutput]: A Boolean value that indicates whether the audio unit component has MIDI output.
  • [IAVAudioUnitComponent.ManufacturerName]: The name of the manufacturer of the audio unit component.
  • [IAVAudioUnitComponent.Name]: The name of the audio unit component.
  • [IAVAudioUnitComponent.PassesAUVal]: A Boolean value that indicates whether the audio unit component passes the validation tests.
  • [IAVAudioUnitComponent.SandboxSafe]: A Boolean value that indicates whether the audio unit component is safe for sandboxing.
  • [IAVAudioUnitComponent.SupportsNumberInputChannelsOutputChannels]: Gets a Boolean value that indicates whether the audio unit component supports the specified number of input and output channels.
  • [IAVAudioUnitComponent.TypeName]: The audio unit component type.
  • [IAVAudioUnitComponent.Version]: The audio unit component version number.
  • [IAVAudioUnitComponent.VersionString]: A string that represents the audio unit component version number.

Getting audio unit component tags

  • [IAVAudioUnitComponent.IconURL]: The URL of an icon that represents the audio unit component.
  • [IAVAudioUnitComponent.Icon]: An icon that represents the component.
  • [IAVAudioUnitComponent.LocalizedTypeName]: The localized type name of the component.
  • [IAVAudioUnitComponent.AllTagNames]: An array of tag names for the audio unit component.
  • [IAVAudioUnitComponent.UserTagNames]: An array of tags the user creates.
  • [IAVAudioUnitComponent.SetUserTagNames]

Audio unit manufacturer names

  • [IAVAudioUnitComponent.AVAudioUnitManufacturerNameApple]: The audio unit manufacturer is Apple.

Audio unit types

  • [IAVAudioUnitComponent.AVAudioUnitTypeOutput]: An audio unit type that represents an output.
  • [IAVAudioUnitComponent.AVAudioUnitTypeMusicDevice]: An audio unit type that represents a music device.
  • [IAVAudioUnitComponent.AVAudioUnitTypeMusicEffect]: An audio unit type that represents a music effect.
  • [IAVAudioUnitComponent.AVAudioUnitTypeFormatConverter]: An audio unit type that represents a format converter.
  • [IAVAudioUnitComponent.AVAudioUnitTypeEffect]: An audio unit type that represents an effect.
  • [IAVAudioUnitComponent.AVAudioUnitTypeMixer]: An audio unit type that represents a mixer.
  • [IAVAudioUnitComponent.AVAudioUnitTypePanner]: An audio unit type that represents a panner.
  • [IAVAudioUnitComponent.AVAudioUnitTypeGenerator]: An audio unit type that represents a generator.
  • [IAVAudioUnitComponent.AVAudioUnitTypeOfflineEffect]: An audio unit type that represents an offline effect.
  • [IAVAudioUnitComponent.AVAudioUnitTypeMIDIProcessor]: An audio unit type that represents a MIDI processor.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponent

type IAVAudioUnitComponentManager 

type IAVAudioUnitComponentManager interface {
	objectivec.IObject

	// Gets an array of audio component objects that match the description.
	ComponentsMatchingDescription(desc objectivec.IObject) []AVAudioUnitComponent
	// Gets an array of audio component objects that match the search predicate.
	ComponentsMatchingPredicate(predicate foundation.INSPredicate) []AVAudioUnitComponent
	// Gets an array of audio components that pass the block method.
	ComponentsPassingTest(testHandler AVAudioUnitComponentHandler) []AVAudioUnitComponent

	// An array of the localized standard system tags the audio units define.
	StandardLocalizedTagNames() []string
	// An array of all tags the audio unit associates with the current user, and the system tags the audio units define.
	TagNames() []string
}

An interface definition for the AVAudioUnitComponentManager class.

Getting matching audio components

  • [IAVAudioUnitComponentManager.ComponentsMatchingDescription]: Gets an array of audio component objects that match the description.
  • [IAVAudioUnitComponentManager.ComponentsMatchingPredicate]: Gets an array of audio component objects that match the search predicate.
  • [IAVAudioUnitComponentManager.ComponentsPassingTest]: Gets an array of audio components that pass the block method.

Getting audio unit tags

  • [IAVAudioUnitComponentManager.StandardLocalizedTagNames]: An array of the localized standard system tags the audio units define.
  • [IAVAudioUnitComponentManager.TagNames]: An array of all tags the audio unit associates with the current user, and the system tags the audio units define.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitComponentManager

type IAVAudioUnitDelay 

type IAVAudioUnitDelay interface {
	IAVAudioUnitEffect

	// The time for the input signal to reach the output.
	DelayTime() float64
	SetDelayTime(value float64)
	// The amount of the output signal that feeds back into the delay line.
	Feedback() float32
	SetFeedback(value float32)
	// The cutoff frequency above which high frequency content rolls off, in hertz.
	LowPassCutoff() float32
	SetLowPassCutoff(value float32)
	// The blend of the wet and dry signals.
	WetDryMix() float32
	SetWetDryMix(value float32)
}

An interface definition for the AVAudioUnitDelay class.

Getting and setting the delay values

  • [IAVAudioUnitDelay.DelayTime]: The time for the input signal to reach the output.
  • [IAVAudioUnitDelay.SetDelayTime]
  • [IAVAudioUnitDelay.Feedback]: The amount of the output signal that feeds back into the delay line.
  • [IAVAudioUnitDelay.SetFeedback]
  • [IAVAudioUnitDelay.LowPassCutoff]: The cutoff frequency above which high frequency content rolls off, in hertz.
  • [IAVAudioUnitDelay.SetLowPassCutoff]
  • [IAVAudioUnitDelay.WetDryMix]: The blend of the wet and dry signals.
  • [IAVAudioUnitDelay.SetWetDryMix]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDelay

type IAVAudioUnitDistortion 

type IAVAudioUnitDistortion interface {
	IAVAudioUnitEffect

	// Configures the audio distortion unit by loading a distortion preset.
	LoadFactoryPreset(preset AVAudioUnitDistortionPreset)

	// The gain that the audio unit applies to the signal before distortion, in decibels.
	PreGain() float32
	SetPreGain(value float32)
	// The blend of the distorted and dry signals.
	WetDryMix() float32
	SetWetDryMix(value float32)
}

An interface definition for the AVAudioUnitDistortion class.

Configuring the distortion

  • [IAVAudioUnitDistortion.LoadFactoryPreset]: Configures the audio distortion unit by loading a distortion preset.

Getting and setting the distortion values

  • [IAVAudioUnitDistortion.PreGain]: The gain that the audio unit applies to the signal before distortion, in decibels.
  • [IAVAudioUnitDistortion.SetPreGain]
  • [IAVAudioUnitDistortion.WetDryMix]: The blend of the distorted and dry signals.
  • [IAVAudioUnitDistortion.SetWetDryMix]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitDistortion

type IAVAudioUnitEQ 

type IAVAudioUnitEQ interface {
	IAVAudioUnitEffect

	// Creates an audio unit equalizer object with the specified number of bands.
	InitWithNumberOfBands(numberOfBands uint) AVAudioUnitEQ

	// An array of equalizer filter parameters.
	Bands() []AVAudioUnitEQFilterParameters
	// The overall gain adjustment that the audio unit applies to the signal, in decibels.
	GlobalGain() float32
	SetGlobalGain(value float32)
}

An interface definition for the AVAudioUnitEQ class.

Creating an equalizer

  • [IAVAudioUnitEQ.InitWithNumberOfBands]: Creates an audio unit equalizer object with the specified number of bands.

Getting and setting the equalizer values

  • [IAVAudioUnitEQ.Bands]: An array of equalizer filter parameters.
  • [IAVAudioUnitEQ.GlobalGain]: The overall gain adjustment that the audio unit applies to the signal, in decibels.
  • [IAVAudioUnitEQ.SetGlobalGain]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQ

type IAVAudioUnitEQFilterParameters 

type IAVAudioUnitEQFilterParameters interface {
	objectivec.IObject

	// The bandwidth of the equalizer filter, in octaves.
	Bandwidth() float32
	SetBandwidth(value float32)
	// The bypass state of the equalizer filter band.
	Bypass() bool
	SetBypass(value bool)
	// The equalizer filter type.
	FilterType() AVAudioUnitEQFilterType
	SetFilterType(value AVAudioUnitEQFilterType)
	// The frequency of the equalizer filter, in hertz.
	Frequency() float32
	SetFrequency(value float32)
	// The gain of the equalizer filter, in decibels.
	Gain() float32
	SetGain(value float32)

	// An array of equalizer filter parameters.
	Bands() IAVAudioUnitEQFilterParameters
	SetBands(value IAVAudioUnitEQFilterParameters)
	// The overall gain adjustment that the audio unit applies to the signal, in decibels.
	GlobalGain() float32
	SetGlobalGain(value float32)
}

An interface definition for the AVAudioUnitEQFilterParameters class.

Getting and Setting Equalizer Filter Parameters

  • [IAVAudioUnitEQFilterParameters.Bandwidth]: The bandwidth of the equalizer filter, in octaves.
  • [IAVAudioUnitEQFilterParameters.SetBandwidth]
  • [IAVAudioUnitEQFilterParameters.Bypass]: The bypass state of the equalizer filter band.
  • [IAVAudioUnitEQFilterParameters.SetBypass]
  • [IAVAudioUnitEQFilterParameters.FilterType]: The equalizer filter type.
  • [IAVAudioUnitEQFilterParameters.SetFilterType]
  • [IAVAudioUnitEQFilterParameters.Frequency]: The frequency of the equalizer filter, in hertz.
  • [IAVAudioUnitEQFilterParameters.SetFrequency]
  • [IAVAudioUnitEQFilterParameters.Gain]: The gain of the equalizer filter, in decibels.
  • [IAVAudioUnitEQFilterParameters.SetGain]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEQFilterParameters

type IAVAudioUnitEffect 

type IAVAudioUnitEffect interface {
	IAVAudioUnit

	// Creates an audio unit effect object with the specified description.
	InitWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitEffect

	// The bypass state of the audio unit.
	Bypass() bool
	SetBypass(value bool)
}

An interface definition for the AVAudioUnitEffect class.

Creating an audio effect

  • [IAVAudioUnitEffect.InitWithAudioComponentDescription]: Creates an audio unit effect object with the specified description.

Getting the bypass state

  • [IAVAudioUnitEffect.Bypass]: The bypass state of the audio unit.
  • [IAVAudioUnitEffect.SetBypass]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitEffect

type IAVAudioUnitGenerator 

type IAVAudioUnitGenerator interface {
	IAVAudioUnit
	AVAudio3DMixing
	AVAudioMixing
	AVAudioStereoMixing

	// Creates a generator audio unit with the specified description.
	InitWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitGenerator

	// The bypass state of the audio unit.
	Bypass() bool
	SetBypass(value bool)
}

An interface definition for the AVAudioUnitGenerator class.

Creating an audio unit generator

  • [IAVAudioUnitGenerator.InitWithAudioComponentDescription]: Creates a generator audio unit with the specified description.

Getting and setting the bypass status

  • [IAVAudioUnitGenerator.Bypass]: The bypass state of the audio unit.
  • [IAVAudioUnitGenerator.SetBypass]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitGenerator

type IAVAudioUnitMIDIInstrument 

type IAVAudioUnitMIDIInstrument interface {
	IAVAudioUnit
	AVAudio3DMixing
	AVAudioMixing
	AVAudioStereoMixing

	// Creates a MIDI instrument audio unit with the component description you specify.
	InitWithAudioComponentDescription(description objectivec.IObject) AVAudioUnitMIDIInstrument

	// Sends a MIDI controller event to the instrument.
	SendControllerWithValueOnChannel(controller uint8, value uint8, channel uint8)
	// Sends a MIDI event which contains one data byte to the instrument.
	SendMIDIEventData1(midiStatus uint8, data1 uint8)
	// Sends a MIDI event which contains two data bytes to the instrument.
	SendMIDIEventData1Data2(midiStatus uint8, data1 uint8, data2 uint8)
	// Sends a MIDI System Exclusive event to the instrument.
	SendMIDISysExEvent(midiData foundation.INSData)
	// Sends a MIDI Pitch Bend event to the instrument.
	SendPitchBendOnChannel(pitchbend uint16, channel uint8)
	// Sends a MIDI channel pressure event to the instrument.
	SendPressureOnChannel(pressure uint8, channel uint8)
	// Sends a MIDI Polyphonic key pressure event to the instrument.
	SendPressureForKeyWithValueOnChannel(key uint8, value uint8, channel uint8)
	// Sends MIDI Program Change and Bank Select events to the instrument.
	SendProgramChangeOnChannel(program uint8, channel uint8)
	// Sends MIDI Program Change and Bank Select events to the instrument.
	SendProgramChangeBankMSBBankLSBOnChannel(program uint8, bankMSB uint8, bankLSB uint8, channel uint8)
	// Sends a MIDI event list to the instrument.
	SendMIDIEventList(eventList objectivec.IObject)

	// Sends a MIDI Note On event to the instrument.
	StartNoteWithVelocityOnChannel(note uint8, velocity uint8, channel uint8)
	// Sends a MIDI Note Off event to the instrument.
	StopNoteOnChannel(note uint8, channel uint8)
}

An interface definition for the AVAudioUnitMIDIInstrument class.

Creating a MIDI instrument

  • [IAVAudioUnitMIDIInstrument.InitWithAudioComponentDescription]: Creates a MIDI instrument audio unit with the component description you specify.

Sending information to the MIDI instrument

  • [IAVAudioUnitMIDIInstrument.SendControllerWithValueOnChannel]: Sends a MIDI controller event to the instrument.
  • [IAVAudioUnitMIDIInstrument.SendMIDIEventData1]: Sends a MIDI event which contains one data byte to the instrument.
  • [IAVAudioUnitMIDIInstrument.SendMIDIEventData1Data2]: Sends a MIDI event which contains two data bytes to the instrument.
  • [IAVAudioUnitMIDIInstrument.SendMIDISysExEvent]: Sends a MIDI System Exclusive event to the instrument.
  • [IAVAudioUnitMIDIInstrument.SendPitchBendOnChannel]: Sends a MIDI Pitch Bend event to the instrument.
  • [IAVAudioUnitMIDIInstrument.SendPressureOnChannel]: Sends a MIDI channel pressure event to the instrument.
  • [IAVAudioUnitMIDIInstrument.SendPressureForKeyWithValueOnChannel]: Sends a MIDI Polyphonic key pressure event to the instrument.
  • [IAVAudioUnitMIDIInstrument.SendProgramChangeOnChannel]: Sends MIDI Program Change and Bank Select events to the instrument.
  • [IAVAudioUnitMIDIInstrument.SendProgramChangeBankMSBBankLSBOnChannel]: Sends MIDI Program Change and Bank Select events to the instrument.
  • [IAVAudioUnitMIDIInstrument.SendMIDIEventList]: Sends a MIDI event list to the instrument.

Starting and stopping play

  • [IAVAudioUnitMIDIInstrument.StartNoteWithVelocityOnChannel]: Sends a MIDI Note On event to the instrument.
  • [IAVAudioUnitMIDIInstrument.StopNoteOnChannel]: Sends a MIDI Note Off event to the instrument.

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitMIDIInstrument

type IAVAudioUnitReverb 

type IAVAudioUnitReverb interface {
	IAVAudioUnitEffect

	// Configures the audio unit as a reverb preset.
	LoadFactoryPreset(preset AVAudioUnitReverbPreset)

	// The blend of the wet and dry signals.
	WetDryMix() float32
	SetWetDryMix(value float32)
}

An interface definition for the AVAudioUnitReverb class.

Configure the reverb

  • [IAVAudioUnitReverb.LoadFactoryPreset]: Configures the audio unit as a reverb preset.

Getting and setting the reverb values

  • [IAVAudioUnitReverb.WetDryMix]: The blend of the wet and dry signals.
  • [IAVAudioUnitReverb.SetWetDryMix]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitReverb

type IAVAudioUnitSampler 

type IAVAudioUnitSampler interface {
	IAVAudioUnitMIDIInstrument

	// Configures the sampler with the specified instrument file.
	LoadInstrumentAtURLError(instrumentURL foundation.INSURL) (bool, error)
	// Configures the sampler by loading the specified audio files.
	LoadAudioFilesAtURLsError(audioFiles []foundation.NSURL) (bool, error)
	// Loads a specific instrument from the specified soundbank.
	LoadSoundBankInstrumentAtURLProgramBankMSBBankLSBError(bankURL foundation.INSURL, program uint8, bankMSB uint8, bankLSB uint8) (bool, error)

	// An adjustment for the tuning of all the played notes.
	GlobalTuning() float32
	SetGlobalTuning(value float32)
	// An adjustment for the gain of all the played notes, in decibels.
	OverallGain() float32
	SetOverallGain(value float32)
	// An adjustment for the stereo panning of all the played notes.
	StereoPan() float32
	SetStereoPan(value float32)
}

An interface definition for the AVAudioUnitSampler class.

Configuring the Sampler Audio Unit

  • [IAVAudioUnitSampler.LoadInstrumentAtURLError]: Configures the sampler with the specified instrument file.
  • [IAVAudioUnitSampler.LoadAudioFilesAtURLsError]: Configures the sampler by loading the specified audio files.
  • [IAVAudioUnitSampler.LoadSoundBankInstrumentAtURLProgramBankMSBBankLSBError]: Loads a specific instrument from the specified soundbank.

Getting and Setting Sampler Values

  • [IAVAudioUnitSampler.GlobalTuning]: An adjustment for the tuning of all the played notes.
  • [IAVAudioUnitSampler.SetGlobalTuning]
  • [IAVAudioUnitSampler.OverallGain]: An adjustment for the gain of all the played notes, in decibels.
  • [IAVAudioUnitSampler.SetOverallGain]
  • [IAVAudioUnitSampler.StereoPan]: An adjustment for the stereo panning of all the played notes.
  • [IAVAudioUnitSampler.SetStereoPan]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitSampler

type IAVAudioUnitTimeEffect 

type IAVAudioUnitTimeEffect interface {
	IAVAudioUnit

	// Creates a time effect audio unit with the specified description.
	InitWithAudioComponentDescription(audioComponentDescription objectivec.IObject) AVAudioUnitTimeEffect

	// The bypass state of the audio unit.
	Bypass() bool
	SetBypass(value bool)
}

An interface definition for the AVAudioUnitTimeEffect class.

Creating a time effect

  • [IAVAudioUnitTimeEffect.InitWithAudioComponentDescription]: Creates a time effect audio unit with the specified description.

Getting and setting the time effect

  • [IAVAudioUnitTimeEffect.Bypass]: The bypass state of the audio unit.
  • [IAVAudioUnitTimeEffect.SetBypass]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimeEffect

type IAVAudioUnitTimePitch 

type IAVAudioUnitTimePitch interface {
	IAVAudioUnitTimeEffect

	// The amount of overlap between segments of the input audio signal.
	Overlap() float32
	SetOverlap(value float32)
	// The amount to use to pitch shift the input signal.
	Pitch() float32
	SetPitch(value float32)
	// The playback rate of the input signal.
	Rate() float32
	SetRate(value float32)
}

An interface definition for the AVAudioUnitTimePitch class.

Getting and setting time pitch values

  • [IAVAudioUnitTimePitch.Overlap]: The amount of overlap between segments of the input audio signal.
  • [IAVAudioUnitTimePitch.SetOverlap]
  • [IAVAudioUnitTimePitch.Pitch]: The amount to use to pitch shift the input signal.
  • [IAVAudioUnitTimePitch.SetPitch]
  • [IAVAudioUnitTimePitch.Rate]: The playback rate of the input signal.
  • [IAVAudioUnitTimePitch.SetRate]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitTimePitch

type IAVAudioUnitVarispeed 

type IAVAudioUnitVarispeed interface {
	IAVAudioUnitTimeEffect

	// The audio playback rate.
	Rate() float32
	SetRate(value float32)
}

An interface definition for the AVAudioUnitVarispeed class.

Getting and setting the playback rate

  • [IAVAudioUnitVarispeed.Rate]: The audio playback rate.
  • [IAVAudioUnitVarispeed.SetRate]

See: https://developer.apple.com/documentation/AVFAudio/AVAudioUnitVarispeed

type IAVExtendedNoteOnEvent 

type IAVExtendedNoteOnEvent interface {
	IAVMusicEvent

	// Creates an event with a MIDI note, velocity, group identifier, and duration.
	InitWithMIDINoteVelocityGroupIDDuration(midiNote float32, velocity float32, groupID uint32, duration AVMusicTimeStamp) AVExtendedNoteOnEvent
	// Creates a note on event with the default instrument.
	InitWithMIDINoteVelocityInstrumentIDGroupIDDuration(midiNote float32, velocity float32, instrumentID uint32, groupID uint32, duration AVMusicTimeStamp) AVExtendedNoteOnEvent

	// The MIDI note number.
	MidiNote() float32
	SetMidiNote(value float32)
	// The MDI velocity.
	Velocity() float32
	SetVelocity(value float32)
	// The instrument identifier.
	InstrumentID() uint32
	SetInstrumentID(value uint32)
	// The audio unit channel that handles the event.
	GroupID() uint32
	SetGroupID(value uint32)
	// The duration of the event, in beats.
	Duration() AVMusicTimeStamp
	SetDuration(value AVMusicTimeStamp)
}

An interface definition for the AVExtendedNoteOnEvent class.

Creating a Note On Event

  • [IAVExtendedNoteOnEvent.InitWithMIDINoteVelocityGroupIDDuration]: Creates an event with a MIDI note, velocity, group identifier, and duration.
  • [IAVExtendedNoteOnEvent.InitWithMIDINoteVelocityInstrumentIDGroupIDDuration]: Creates a note on event with the default instrument.

Configuring a Note On Event

  • [IAVExtendedNoteOnEvent.MidiNote]: The MIDI note number.
  • [IAVExtendedNoteOnEvent.SetMidiNote]
  • [IAVExtendedNoteOnEvent.Velocity]: The MDI velocity.
  • [IAVExtendedNoteOnEvent.SetVelocity]
  • [IAVExtendedNoteOnEvent.InstrumentID]: The instrument identifier.
  • [IAVExtendedNoteOnEvent.SetInstrumentID]
  • [IAVExtendedNoteOnEvent.GroupID]: The audio unit channel that handles the event.
  • [IAVExtendedNoteOnEvent.SetGroupID]
  • [IAVExtendedNoteOnEvent.Duration]: The duration of the event, in beats.
  • [IAVExtendedNoteOnEvent.SetDuration]

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedNoteOnEvent

type IAVExtendedTempoEvent 

type IAVExtendedTempoEvent interface {
	IAVMusicEvent

	// Creates an extended tempo event.
	InitWithTempo(tempo float64) AVExtendedTempoEvent

	// The tempo in beats per minute as a positive value.
	Tempo() float64
	SetTempo(value float64)
}

An interface definition for the AVExtendedTempoEvent class.

Creating a Tempo Event

  • [IAVExtendedTempoEvent.InitWithTempo]: Creates an extended tempo event.

Configuring a Tempo Event

  • [IAVExtendedTempoEvent.Tempo]: The tempo in beats per minute as a positive value.
  • [IAVExtendedTempoEvent.SetTempo]

See: https://developer.apple.com/documentation/AVFAudio/AVExtendedTempoEvent

type IAVMIDIChannelEvent 

type IAVMIDIChannelEvent interface {
	IAVMusicEvent

	// The MIDI channel.
	Channel() uint32
	SetChannel(value uint32)
}

An interface definition for the AVMIDIChannelEvent class.

Configuring a Channel Event

  • [IAVMIDIChannelEvent.Channel]: The MIDI channel.
  • [IAVMIDIChannelEvent.SetChannel]

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIChannelEvent

type IAVMIDIChannelPressureEvent 

type IAVMIDIChannelPressureEvent interface {
	IAVMIDIChannelEvent

	// Creates a pressure event with a channel and pressure value.
	InitWithChannelPressure(channel uint32, pressure uint32) AVMIDIChannelPressureEvent

	// The MIDI channel pressure.
	Pressure() uint32
	SetPressure(value uint32)
}

An interface definition for the AVMIDIChannelPressureEvent class.

Creating a Pressure Event

  • [IAVMIDIChannelPressureEvent.InitWithChannelPressure]: Creates a pressure event with a channel and pressure value.

Configuring a Pressure Event

  • [IAVMIDIChannelPressureEvent.Pressure]: The MIDI channel pressure.
  • [IAVMIDIChannelPressureEvent.SetPressure]

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIChannelPressureEvent

type IAVMIDIControlChangeEvent 

type IAVMIDIControlChangeEvent interface {
	IAVMIDIChannelEvent

	// Creates an event with a channel, control change type, and a value.
	InitWithChannelMessageTypeValue(channel uint32, messageType AVMIDIControlChangeMessageType, value uint32) AVMIDIControlChangeEvent

	// The value of the control change event.
	Value() uint32
	// The type of control change message.
	MessageType() AVMIDIControlChangeMessageType
}

An interface definition for the AVMIDIControlChangeEvent class.

Creating a Control Change Event

  • [IAVMIDIControlChangeEvent.InitWithChannelMessageTypeValue]: Creates an event with a channel, control change type, and a value.

Inspecting a Control Change Event

  • [IAVMIDIControlChangeEvent.Value]: The value of the control change event.
  • [IAVMIDIControlChangeEvent.MessageType]: The type of control change message.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIControlChangeEvent

type IAVMIDIMetaEvent 

type IAVMIDIMetaEvent interface {
	IAVMusicEvent

	// Creates an event with a MIDI meta event type and data.
	InitWithTypeData(type_ AVMIDIMetaEventType, data foundation.INSData) AVMIDIMetaEvent

	// The type of meta event.
	Type() AVMIDIMetaEventType
}

An interface definition for the AVMIDIMetaEvent class.

Creating a Meta Event

  • [IAVMIDIMetaEvent.InitWithTypeData]: Creates an event with a MIDI meta event type and data.

Getting the Meta Event Type

  • [IAVMIDIMetaEvent.Type]: The type of meta event.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIMetaEvent

type IAVMIDINoteEvent 

type IAVMIDINoteEvent interface {
	IAVMusicEvent

	// Creates an event with a MIDI channel, key number, velocity, and duration.
	InitWithChannelKeyVelocityDuration(channel uint32, keyNum uint32, velocity uint32, duration AVMusicTimeStamp) AVMIDINoteEvent

	// The MIDI channel.
	Channel() uint32
	SetChannel(value uint32)
	// The MIDI key number.
	Key() uint32
	SetKey(value uint32)
	// The MIDI velocity.
	Velocity() uint32
	SetVelocity(value uint32)
	// The duration for the note, in beats.
	Duration() AVMusicTimeStamp
	SetDuration(value AVMusicTimeStamp)
}

An interface definition for the AVMIDINoteEvent class.

Creating a MIDI Note Event

  • [IAVMIDINoteEvent.InitWithChannelKeyVelocityDuration]: Creates an event with a MIDI channel, key number, velocity, and duration.

Configuring a MIDI Note Event

  • [IAVMIDINoteEvent.Channel]: The MIDI channel.
  • [IAVMIDINoteEvent.SetChannel]
  • [IAVMIDINoteEvent.Key]: The MIDI key number.
  • [IAVMIDINoteEvent.SetKey]
  • [IAVMIDINoteEvent.Velocity]: The MIDI velocity.
  • [IAVMIDINoteEvent.SetVelocity]
  • [IAVMIDINoteEvent.Duration]: The duration for the note, in beats.
  • [IAVMIDINoteEvent.SetDuration]

See: https://developer.apple.com/documentation/AVFAudio/AVMIDINoteEvent

type IAVMIDIPitchBendEvent 

type IAVMIDIPitchBendEvent interface {
	IAVMIDIChannelEvent

	// Creates an event with a channel and pitch bend value.
	InitWithChannelValue(channel uint32, value uint32) AVMIDIPitchBendEvent

	// The value of the pitch bend event.
	Value() uint32
	SetValue(value uint32)
}

An interface definition for the AVMIDIPitchBendEvent class.

Creating a Pitch Bend Event

  • [IAVMIDIPitchBendEvent.InitWithChannelValue]: Creates an event with a channel and pitch bend value.

Configuring a Pitch Bend Event

  • [IAVMIDIPitchBendEvent.Value]: The value of the pitch bend event.
  • [IAVMIDIPitchBendEvent.SetValue]

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPitchBendEvent

type IAVMIDIPlayer 

type IAVMIDIPlayer interface {
	objectivec.IObject

	// Creates a player to play a MIDI file with the specified soundbank.
	InitWithContentsOfURLSoundBankURLError(inURL foundation.INSURL, bankURL foundation.INSURL) (AVMIDIPlayer, error)
	// Creates a player to play MIDI data with the specified soundbank.
	InitWithDataSoundBankURLError(data foundation.INSData, bankURL foundation.INSURL) (AVMIDIPlayer, error)

	// Prepares the player to play the sequence by prerolling all events.
	PrepareToPlay()
	// Plays the MIDI sequence.
	Play(completionHandler ErrorHandler)
	// Stops playing the sequence.
	Stop()
	// A Boolean value that indicates whether the sequence is playing.
	Playing() bool

	// The playback rate of the player.
	Rate() float32
	SetRate(value float32)

	// The current playback position, in seconds.
	CurrentPosition() float64
	SetCurrentPosition(value float64)
	// The duration, in seconds, of the currently loaded file.
	Duration() float64
}

An interface definition for the AVMIDIPlayer class.

Creating a MIDI player

  • [IAVMIDIPlayer.InitWithContentsOfURLSoundBankURLError]: Creates a player to play a MIDI file with the specified soundbank.
  • [IAVMIDIPlayer.InitWithDataSoundBankURLError]: Creates a player to play MIDI data with the specified soundbank.

Controlling playback

  • [IAVMIDIPlayer.PrepareToPlay]: Prepares the player to play the sequence by prerolling all events.
  • [IAVMIDIPlayer.Play]: Plays the MIDI sequence.
  • [IAVMIDIPlayer.Stop]: Stops playing the sequence.
  • [IAVMIDIPlayer.Playing]: A Boolean value that indicates whether the sequence is playing.

Configuring playback settings

  • [IAVMIDIPlayer.Rate]: The playback rate of the player.
  • [IAVMIDIPlayer.SetRate]

Accessing player timing

  • [IAVMIDIPlayer.CurrentPosition]: The current playback position, in seconds.
  • [IAVMIDIPlayer.SetCurrentPosition]
  • [IAVMIDIPlayer.Duration]: The duration, in seconds, of the currently loaded file.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPlayer

type IAVMIDIPolyPressureEvent 

type IAVMIDIPolyPressureEvent interface {
	IAVMIDIChannelEvent

	// Creates an event with a channel, MIDI key number, and a key pressure value.
	InitWithChannelKeyPressure(channel uint32, key uint32, pressure uint32) AVMIDIPolyPressureEvent

	// The MIDI key number.
	Key() uint32
	SetKey(value uint32)
	// The poly pressure value for the requested key.
	Pressure() uint32
	SetPressure(value uint32)
}

An interface definition for the AVMIDIPolyPressureEvent class.

Creating a Poly Pressure Event

  • [IAVMIDIPolyPressureEvent.InitWithChannelKeyPressure]: Creates an event with a channel, MIDI key number, and a key pressure value.

Configuring a Poly Pressure Event

  • [IAVMIDIPolyPressureEvent.Key]: The MIDI key number.
  • [IAVMIDIPolyPressureEvent.SetKey]
  • [IAVMIDIPolyPressureEvent.Pressure]: The poly pressure value for the requested key.
  • [IAVMIDIPolyPressureEvent.SetPressure]

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIPolyPressureEvent

type IAVMIDIProgramChangeEvent 

type IAVMIDIProgramChangeEvent interface {
	IAVMIDIChannelEvent

	// Creates a program change event with a channel and program number.
	InitWithChannelProgramNumber(channel uint32, programNumber uint32) AVMIDIProgramChangeEvent

	// The MIDI program number.
	ProgramNumber() uint32
	SetProgramNumber(value uint32)
}

An interface definition for the AVMIDIProgramChangeEvent class.

Creating a Program Change Event

  • [IAVMIDIProgramChangeEvent.InitWithChannelProgramNumber]: Creates a program change event with a channel and program number.

Configuring a Program Change Event

  • [IAVMIDIProgramChangeEvent.ProgramNumber]: The MIDI program number.
  • [IAVMIDIProgramChangeEvent.SetProgramNumber]

See: https://developer.apple.com/documentation/AVFAudio/AVMIDIProgramChangeEvent

type IAVMIDISysexEvent 

type IAVMIDISysexEvent interface {
	IAVMusicEvent

	// Creates a system event with the data you specify.
	InitWithData(data foundation.INSData) AVMIDISysexEvent

	// The size of the data that this event contains.
	SizeInBytes() uint32
}

An interface definition for the AVMIDISysexEvent class.

Creates a System Event

  • [IAVMIDISysexEvent.InitWithData]: Creates a system event with the data you specify.

Getting the Size of the Event

  • [IAVMIDISysexEvent.SizeInBytes]: The size of the data that this event contains.

See: https://developer.apple.com/documentation/AVFAudio/AVMIDISysexEvent

type IAVMusicEvent 

type IAVMusicEvent interface {
	objectivec.IObject
}

An interface definition for the AVMusicEvent class.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicEvent

type IAVMusicTrack 

type IAVMusicTrack interface {
	objectivec.IObject

	// A Boolean value that indicates whether the track is in a muted state.
	Muted() bool
	SetMuted(value bool)
	// A Boolean value that indicates whether the track is in a soloed state.
	Soloed() bool
	SetSoloed(value bool)
	// The offset of the track’s start time, in beats.
	OffsetTime() AVMusicTimeStamp
	SetOffsetTime(value AVMusicTimeStamp)
	// The time resolution value for the sequence, in ticks (pulses) per quarter note.
	TimeResolution() uint
	// A Boolean value that indicates whether the track is an automation track.
	UsesAutomatedParameters() bool
	SetUsesAutomatedParameters(value bool)

	// The total duration of the track, in beats.
	LengthInBeats() AVMusicTimeStamp
	SetLengthInBeats(value AVMusicTimeStamp)
	// The total duration of the track, in seconds.
	LengthInSeconds() float64
	SetLengthInSeconds(value float64)

	// The audio unit that receives the track’s events.
	DestinationAudioUnit() IAVAudioUnit
	SetDestinationAudioUnit(value IAVAudioUnit)
	// The MIDI endpoint you specify as the track’s target.
	DestinationMIDIEndpoint() objectivec.IObject
	SetDestinationMIDIEndpoint(value objectivec.IObject)

	// A Boolean value that indicates whether the track is in a looping state.
	LoopingEnabled() bool
	SetLoopingEnabled(value bool)
	// The timestamp range for the loop, in beats.
	LoopRange() AVBeatRange
	SetLoopRange(value AVBeatRange)
	// The number of times the track’s loop repeats.
	NumberOfLoops() int
	SetNumberOfLoops(value int)

	// Adds a music event to a track at the time you specify.
	AddEventAtBeat(event IAVMusicEvent, beat AVMusicTimeStamp)
	// Moves the beat location of all events in the given beat range by the amount you specify.
	MoveEventsInRangeByAmount(range_ AVBeatRange, beatAmount AVMusicTimeStamp)
	// Removes all events in the given beat range from the music track.
	ClearEventsInRange(range_ AVBeatRange)

	// Splices all events in the beat range from the music track.
	CutEventsInRange(range_ AVBeatRange)
	// Copies the events from the source track and splices them into the current music track.
	CopyEventsInRangeFromTrackInsertAtBeat(range_ AVBeatRange, sourceTrack IAVMusicTrack, insertStartBeat AVMusicTimeStamp)
	// Copies the events from the source track and merges them into the current music track.
	CopyAndMergeEventsInRangeFromTrackMergeAtBeat(range_ AVBeatRange, sourceTrack IAVMusicTrack, mergeStartBeat AVMusicTimeStamp)

	// Iterates through the music events within the track.
	EnumerateEventsInRangeUsingBlock(range_ AVBeatRange, block AVMusicEventEnumerationBlock)

	// A timestamp you use to access all events in a music track through a beat range.
	AVMusicTimeStampEndOfTrack() float64
	SetAVMusicTimeStampEndOfTrack(value float64)
}

An interface definition for the AVMusicTrack class.

Configuring Music Track Properties

  • [IAVMusicTrack.Muted]: A Boolean value that indicates whether the track is in a muted state.
  • [IAVMusicTrack.SetMuted]
  • [IAVMusicTrack.Soloed]: A Boolean value that indicates whether the track is in a soloed state.
  • [IAVMusicTrack.SetSoloed]
  • [IAVMusicTrack.OffsetTime]: The offset of the track’s start time, in beats.
  • [IAVMusicTrack.SetOffsetTime]
  • [IAVMusicTrack.TimeResolution]: The time resolution value for the sequence, in ticks (pulses) per quarter note.
  • [IAVMusicTrack.UsesAutomatedParameters]: A Boolean value that indicates whether the track is an automation track.
  • [IAVMusicTrack.SetUsesAutomatedParameters]

Configuring the Track Duration

  • [IAVMusicTrack.LengthInBeats]: The total duration of the track, in beats.
  • [IAVMusicTrack.SetLengthInBeats]
  • [IAVMusicTrack.LengthInSeconds]: The total duration of the track, in seconds.
  • [IAVMusicTrack.SetLengthInSeconds]

Configuring the Track Destinations

  • [IAVMusicTrack.DestinationAudioUnit]: The audio unit that receives the track’s events.
  • [IAVMusicTrack.SetDestinationAudioUnit]
  • [IAVMusicTrack.DestinationMIDIEndpoint]: The MIDI endpoint you specify as the track’s target.
  • [IAVMusicTrack.SetDestinationMIDIEndpoint]

Configuring the Looping State

  • [IAVMusicTrack.LoopingEnabled]: A Boolean value that indicates whether the track is in a looping state.
  • [IAVMusicTrack.SetLoopingEnabled]
  • [IAVMusicTrack.LoopRange]: The timestamp range for the loop, in beats.
  • [IAVMusicTrack.SetLoopRange]
  • [IAVMusicTrack.NumberOfLoops]: The number of times the track’s loop repeats.
  • [IAVMusicTrack.SetNumberOfLoops]

Adding and Clearing Events

  • [IAVMusicTrack.AddEventAtBeat]: Adds a music event to a track at the time you specify.
  • [IAVMusicTrack.MoveEventsInRangeByAmount]: Moves the beat location of all events in the given beat range by the amount you specify.
  • [IAVMusicTrack.ClearEventsInRange]: Removes all events in the given beat range from the music track.

Cutting and Copying Events

  • [IAVMusicTrack.CutEventsInRange]: Splices all events in the beat range from the music track.
  • [IAVMusicTrack.CopyEventsInRangeFromTrackInsertAtBeat]: Copies the events from the source track and splices them into the current music track.
  • [IAVMusicTrack.CopyAndMergeEventsInRangeFromTrackMergeAtBeat]: Copies the events from the source track and merges them into the current music track.

Iterating Over Events

  • [IAVMusicTrack.EnumerateEventsInRangeUsingBlock]: Iterates through the music events within the track.

Getting the End of Track Timestamp

  • [IAVMusicTrack.AVMusicTimeStampEndOfTrack]: A timestamp you use to access all events in a music track through a beat range.
  • [IAVMusicTrack.SetAVMusicTimeStampEndOfTrack]

See: https://developer.apple.com/documentation/AVFAudio/AVMusicTrack

type IAVMusicUserEvent 

type IAVMusicUserEvent interface {
	IAVMusicEvent

	// Creates a user event with the data you specify.
	InitWithData(data foundation.INSData) AVMusicUserEvent

	// The size of the data that the user event represents.
	SizeInBytes() uint32
}

An interface definition for the AVMusicUserEvent class.

Creating a User Event

  • [IAVMusicUserEvent.InitWithData]: Creates a user event with the data you specify.

Inspecting a User Event

  • [IAVMusicUserEvent.SizeInBytes]: The size of the data that the user event represents.

See: https://developer.apple.com/documentation/AVFAudio/AVMusicUserEvent

type IAVParameterEvent 

type IAVParameterEvent interface {
	IAVMusicEvent

	// Creates an event with a parameter identifier, scope, element, and value for the parameter to set.
	InitWithParameterIDScopeElementValue(parameterID uint32, scope uint32, element uint32, value float32) AVParameterEvent

	// The identifier of the parameter.
	ParameterID() uint32
	SetParameterID(value uint32)
	// The audio unit scope for the parameter.
	Scope() uint32
	SetScope(value uint32)
	// The element index in the scope.
	Element() uint32
	SetElement(value uint32)
	// The value of the parameter to set.
	Value() float32
	SetValue(value float32)
}

An interface definition for the AVParameterEvent class.

Creating a Parameter Event

  • [IAVParameterEvent.InitWithParameterIDScopeElementValue]: Creates an event with a parameter identifier, scope, element, and value for the parameter to set.

Configuring a Parameter Event

  • [IAVParameterEvent.ParameterID]: The identifier of the parameter.
  • [IAVParameterEvent.SetParameterID]
  • [IAVParameterEvent.Scope]: The audio unit scope for the parameter.
  • [IAVParameterEvent.SetScope]
  • [IAVParameterEvent.Element]: The element index in the scope.
  • [IAVParameterEvent.SetElement]
  • [IAVParameterEvent.Value]: The value of the parameter to set.
  • [IAVParameterEvent.SetValue]

See: https://developer.apple.com/documentation/AVFAudio/AVParameterEvent

type IAVSpeechSynthesisMarker 

type IAVSpeechSynthesisMarker interface {
	objectivec.IObject

	// Creates a marker with a type and location of the request’s text.
	InitWithMarkerTypeForTextRangeAtByteSampleOffset(type_ AVSpeechSynthesisMarkerMark, range_ foundation.NSRange, byteSampleOffset uint) AVSpeechSynthesisMarker
	// Creates a word marker with a range of the word and offset into the audio buffer.
	InitWithWordRangeAtByteSampleOffset(range_ foundation.NSRange, byteSampleOffset int) AVSpeechSynthesisMarker
	// Creates a sentence marker with a range of the sentence and offset into the audio buffer.
	InitWithSentenceRangeAtByteSampleOffset(range_ foundation.NSRange, byteSampleOffset int) AVSpeechSynthesisMarker
	// Creates a paragraph marker with a range of the paragraph and offset into the audio buffer.
	InitWithParagraphRangeAtByteSampleOffset(range_ foundation.NSRange, byteSampleOffset int) AVSpeechSynthesisMarker
	// Creates a phoneme marker with a range of the phoneme and offset into the audio buffer.
	InitWithPhonemeStringAtByteSampleOffset(phoneme string, byteSampleOffset int) AVSpeechSynthesisMarker
	// Creates a bookmark marker with a name and offset into the audio buffer.
	InitWithBookmarkNameAtByteSampleOffset(mark string, byteSampleOffset int) AVSpeechSynthesisMarker

	// The type that describes the text.
	Mark() AVSpeechSynthesisMarkerMark
	SetMark(value AVSpeechSynthesisMarkerMark)
	// A string that represents the name of a bookmark.
	BookmarkName() string
	SetBookmarkName(value string)
	// A string that represents a distinct sound.
	Phoneme() string
	SetPhoneme(value string)
	// The location and length of the request’s text.
	TextRange() foundation.NSRange
	SetTextRange(value foundation.NSRange)
	// The byte offset into the audio buffer.
	ByteSampleOffset() uint
	SetByteSampleOffset(value uint)

	// A block that subclasses use to send marker information to the host.
	SpeechSynthesisOutputMetadataBlock() AVSpeechSynthesisProviderOutputBlock
	SetSpeechSynthesisOutputMetadataBlock(value AVSpeechSynthesisProviderOutputBlock)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the AVSpeechSynthesisMarker class.

Creating a marker

  • [IAVSpeechSynthesisMarker.InitWithMarkerTypeForTextRangeAtByteSampleOffset]: Creates a marker with a type and location of the request’s text.
  • [IAVSpeechSynthesisMarker.InitWithWordRangeAtByteSampleOffset]: Creates a word marker with a range of the word and offset into the audio buffer.
  • [IAVSpeechSynthesisMarker.InitWithSentenceRangeAtByteSampleOffset]: Creates a sentence marker with a range of the sentence and offset into the audio buffer.
  • [IAVSpeechSynthesisMarker.InitWithParagraphRangeAtByteSampleOffset]: Creates a paragraph marker with a range of the paragraph and offset into the audio buffer.
  • [IAVSpeechSynthesisMarker.InitWithPhonemeStringAtByteSampleOffset]: Creates a phoneme marker with a range of the phoneme and offset into the audio buffer.
  • [IAVSpeechSynthesisMarker.InitWithBookmarkNameAtByteSampleOffset]: Creates a bookmark marker with a name and offset into the audio buffer.

Inspecting a marker

  • [IAVSpeechSynthesisMarker.Mark]: The type that describes the text.
  • [IAVSpeechSynthesisMarker.SetMark]
  • [IAVSpeechSynthesisMarker.BookmarkName]: A string that represents the name of a bookmark.
  • [IAVSpeechSynthesisMarker.SetBookmarkName]
  • [IAVSpeechSynthesisMarker.Phoneme]: A string that represents a distinct sound.
  • [IAVSpeechSynthesisMarker.SetPhoneme]
  • [IAVSpeechSynthesisMarker.TextRange]: The location and length of the request’s text.
  • [IAVSpeechSynthesisMarker.SetTextRange]
  • [IAVSpeechSynthesisMarker.ByteSampleOffset]: The byte offset into the audio buffer.
  • [IAVSpeechSynthesisMarker.SetByteSampleOffset]

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisMarker

type IAVSpeechSynthesisProviderAudioUnit 

type IAVSpeechSynthesisProviderAudioUnit interface {
	objectivec.IObject

	// Sets the text to synthesize and the voice to use.
	SynthesizeSpeechRequest(speechRequest IAVSpeechSynthesisProviderRequest)

	// A block that subclasses use to send marker information to the host.
	SpeechSynthesisOutputMetadataBlock() AVSpeechSynthesisProviderOutputBlock
	SetSpeechSynthesisOutputMetadataBlock(value AVSpeechSynthesisProviderOutputBlock)

	// A list of voices the audio unit provides to the system.
	SpeechVoices() []AVSpeechSynthesisProviderVoice
	SetSpeechVoices(value []AVSpeechSynthesisProviderVoice)

	// Informs the audio unit to discard the speech request.
	CancelSpeechRequest()
}

An interface definition for the AVSpeechSynthesisProviderAudioUnit class.

Rendering speech

  • [IAVSpeechSynthesisProviderAudioUnit.SynthesizeSpeechRequest]: Sets the text to synthesize and the voice to use.

Supplying metadata

  • [IAVSpeechSynthesisProviderAudioUnit.SpeechSynthesisOutputMetadataBlock]: A block that subclasses use to send marker information to the host.
  • [IAVSpeechSynthesisProviderAudioUnit.SetSpeechSynthesisOutputMetadataBlock]

Getting and setting voices

  • [IAVSpeechSynthesisProviderAudioUnit.SpeechVoices]: A list of voices the audio unit provides to the system.
  • [IAVSpeechSynthesisProviderAudioUnit.SetSpeechVoices]

Cancelling a request

  • [IAVSpeechSynthesisProviderAudioUnit.CancelSpeechRequest]: Informs the audio unit to discard the speech request.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderAudioUnit

type IAVSpeechSynthesisProviderRequest 

type IAVSpeechSynthesisProviderRequest interface {
	objectivec.IObject

	// Creates a request with a voice and a description.
	InitWithSSMLRepresentationVoice(text string, voice IAVSpeechSynthesisProviderVoice) AVSpeechSynthesisProviderRequest

	// The description of the text to synthesize.
	SsmlRepresentation() string
	// The voice to use in the speech request.
	Voice() IAVSpeechSynthesisProviderVoice

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the AVSpeechSynthesisProviderRequest class.

Creating a request

  • [IAVSpeechSynthesisProviderRequest.InitWithSSMLRepresentationVoice]: Creates a request with a voice and a description.

Inspecting a request

  • [IAVSpeechSynthesisProviderRequest.SsmlRepresentation]: The description of the text to synthesize.
  • [IAVSpeechSynthesisProviderRequest.Voice]: The voice to use in the speech request.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderRequest

type IAVSpeechSynthesisProviderVoice 

type IAVSpeechSynthesisProviderVoice interface {
	objectivec.IObject

	// Creates a voice with a name, an identifier, and language information.
	InitWithNameIdentifierPrimaryLanguagesSupportedLanguages(name string, identifier string, primaryLanguages []string, supportedLanguages []string) AVSpeechSynthesisProviderVoice

	// The age of the voice, in years.
	Age() int
	SetAge(value int)
	// The gender of the voice.
	Gender() AVSpeechSynthesisVoiceGender
	SetGender(value AVSpeechSynthesisVoiceGender)
	// The unique identifier for the voice.
	Identifier() string
	// The localized name of the voice.
	Name() string
	// A list of BCP 47 codes that identify the languages the synthesizer uses.
	PrimaryLanguages() []string
	// A list of BCP 47 codes that identify the languages a voice supports.
	SupportedLanguages() []string
	// The version of the voice.
	Version() string
	SetVersion(value string)
	// The size of the voice package on disk, in bytes.
	VoiceSize() int64
	SetVoiceSize(value int64)

	// A list of voices the audio unit provides to the system.
	SpeechVoices() IAVSpeechSynthesisProviderVoice
	SetSpeechVoices(value IAVSpeechSynthesisProviderVoice)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the AVSpeechSynthesisProviderVoice class.

Creating a voice

  • [IAVSpeechSynthesisProviderVoice.InitWithNameIdentifierPrimaryLanguagesSupportedLanguages]: Creates a voice with a name, an identifier, and language information.

Inspecting a voice

  • [IAVSpeechSynthesisProviderVoice.Age]: The age of the voice, in years.
  • [IAVSpeechSynthesisProviderVoice.SetAge]
  • [IAVSpeechSynthesisProviderVoice.Gender]: The gender of the voice.
  • [IAVSpeechSynthesisProviderVoice.SetGender]
  • [IAVSpeechSynthesisProviderVoice.Identifier]: The unique identifier for the voice.
  • [IAVSpeechSynthesisProviderVoice.Name]: The localized name of the voice.
  • [IAVSpeechSynthesisProviderVoice.PrimaryLanguages]: A list of BCP 47 codes that identify the languages the synthesizer uses.
  • [IAVSpeechSynthesisProviderVoice.SupportedLanguages]: A list of BCP 47 codes that identify the languages a voice supports.
  • [IAVSpeechSynthesisProviderVoice.Version]: The version of the voice.
  • [IAVSpeechSynthesisProviderVoice.SetVersion]
  • [IAVSpeechSynthesisProviderVoice.VoiceSize]: The size of the voice package on disk, in bytes.
  • [IAVSpeechSynthesisProviderVoice.SetVoiceSize]

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisProviderVoice

type IAVSpeechSynthesisVoice 

type IAVSpeechSynthesisVoice interface {
	objectivec.IObject

	// The voice that the system identifies as Alex.
	AVSpeechSynthesisVoiceIdentifierAlex() string

	// The unique identifier of a voice.
	Identifier() string
	// The name of a voice.
	Name() string
	// The speech quality of a voice.
	Quality() AVSpeechSynthesisVoiceQuality
	// The gender for a voice.
	Gender() AVSpeechSynthesisVoiceGender
	// The traits of a voice.
	VoiceTraits() AVSpeechSynthesisVoiceTraits
	// A dictionary that contains audio file settings.
	AudioFileSettings() foundation.INSDictionary

	// A BCP 47 code that contains the voice’s language and locale.
	Language() string

	// The voice the speech synthesizer uses when speaking the utterance.
	Voice() IAVSpeechSynthesisVoice
	SetVoice(value IAVSpeechSynthesisVoice)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the AVSpeechSynthesisVoice class.

Obtaining voices

  • [IAVSpeechSynthesisVoice.AVSpeechSynthesisVoiceIdentifierAlex]: The voice that the system identifies as Alex.

Inspecting voices

  • [IAVSpeechSynthesisVoice.Identifier]: The unique identifier of a voice.
  • [IAVSpeechSynthesisVoice.Name]: The name of a voice.
  • [IAVSpeechSynthesisVoice.Quality]: The speech quality of a voice.
  • [IAVSpeechSynthesisVoice.Gender]: The gender for a voice.
  • [IAVSpeechSynthesisVoice.VoiceTraits]: The traits of a voice.
  • [IAVSpeechSynthesisVoice.AudioFileSettings]: A dictionary that contains audio file settings.

Working with language codes

  • [IAVSpeechSynthesisVoice.Language]: A BCP 47 code that contains the voice’s language and locale.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesisVoice

type IAVSpeechSynthesizer 

type IAVSpeechSynthesizer interface {
	objectivec.IObject

	// Adds the utterance you specify to the speech synthesizer’s queue.
	SpeakUtterance(utterance IAVSpeechUtterance)
	// Resumes speech from its paused point.
	ContinueSpeaking() bool
	// Pauses speech at the boundary you specify.
	PauseSpeakingAtBoundary(boundary AVSpeechBoundary) bool
	// Stops speech at the boundary you specify.
	StopSpeakingAtBoundary(boundary AVSpeechBoundary) bool

	// A Boolean value that indicates whether the speech synthesizer is speaking or is in a paused state and has utterances to speak.
	Speaking() bool
	// A Boolean value that indicates whether a speech synthesizer is in a paused state.
	Paused() bool

	// The delegate object for the speech synthesizer.
	Delegate() AVSpeechSynthesizerDelegate
	SetDelegate(value AVSpeechSynthesizerDelegate)

	// Generates speech for the utterance and invokes the callback with the audio buffer.
	WriteUtteranceToBufferCallback(utterance IAVSpeechUtterance, bufferCallback AVSpeechSynthesizerBufferCallback)
	// Generates audio buffers and associated metadata for storage or further speech synthesis processing.
	WriteUtteranceToBufferCallbackToMarkerCallback(utterance IAVSpeechUtterance, bufferCallback AVSpeechSynthesizerBufferCallback, markerCallback AVSpeechSynthesizerMarkerCallback)

	// The amount of time the speech synthesizer pauses before speaking the utterance.
	PreUtteranceDelay() float64
	SetPreUtteranceDelay(value float64)
	// The voice the speech synthesizer uses when speaking the utterance.
	Voice() IAVSpeechSynthesisVoice
	SetVoice(value IAVSpeechSynthesisVoice)
}

An interface definition for the AVSpeechSynthesizer class.

Controlling speech

  • [IAVSpeechSynthesizer.SpeakUtterance]: Adds the utterance you specify to the speech synthesizer’s queue.
  • [IAVSpeechSynthesizer.ContinueSpeaking]: Resumes speech from its paused point.
  • [IAVSpeechSynthesizer.PauseSpeakingAtBoundary]: Pauses speech at the boundary you specify.
  • [IAVSpeechSynthesizer.StopSpeakingAtBoundary]: Stops speech at the boundary you specify.

Inspecting a speech synthesizer

  • [IAVSpeechSynthesizer.Speaking]: A Boolean value that indicates whether the speech synthesizer is speaking or is in a paused state and has utterances to speak.
  • [IAVSpeechSynthesizer.Paused]: A Boolean value that indicates whether a speech synthesizer is in a paused state.

Managing the delegate

  • [IAVSpeechSynthesizer.Delegate]: The delegate object for the speech synthesizer.
  • [IAVSpeechSynthesizer.SetDelegate]

Directing speech output

  • [IAVSpeechSynthesizer.WriteUtteranceToBufferCallback]: Generates speech for the utterance and invokes the callback with the audio buffer.
  • [IAVSpeechSynthesizer.WriteUtteranceToBufferCallbackToMarkerCallback]: Generates audio buffers and associated metadata for storage or further speech synthesis processing.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechSynthesizer

type IAVSpeechUtterance 

type IAVSpeechUtterance interface {
	objectivec.IObject

	// Creates an utterance with the text string that you specify for the speech synthesizer to speak.
	InitWithString(string_ string) AVSpeechUtterance
	// Creates an utterance with the attributed text string that you specify for the speech synthesizer to speak.
	InitWithAttributedString(string_ foundation.NSAttributedString) AVSpeechUtterance
	// A string that contains International Phonetic Alphabet (IPA) symbols the speech synthesizer uses to control pronunciation of certain words or phrases.
	AVSpeechSynthesisIPANotationAttribute() string
	// Creates a speech utterance with an Speech Synthesis Markup Language (SSML) string.
	InitWithSSMLRepresentation(string_ string) AVSpeechUtterance

	// The voice the speech synthesizer uses when speaking the utterance.
	Voice() IAVSpeechSynthesisVoice
	SetVoice(value IAVSpeechSynthesisVoice)
	// The baseline pitch the speech synthesizer uses when speaking the utterance.
	PitchMultiplier() float32
	SetPitchMultiplier(value float32)
	// The volume the speech synthesizer uses when speaking the utterance.
	Volume() float32
	SetVolume(value float32)
	// A Boolean that specifies whether assistive technology settings take precedence over the property values of this utterance.
	PrefersAssistiveTechnologySettings() bool
	SetPrefersAssistiveTechnologySettings(value bool)

	// The rate the speech synthesizer uses when speaking the utterance.
	Rate() float32
	SetRate(value float32)
	// The minimum rate the speech synthesizer uses when speaking an utterance.
	AVSpeechUtteranceMinimumSpeechRate() float32
	// The maximum rate the speech synthesizer uses when speaking an utterance.
	AVSpeechUtteranceMaximumSpeechRate() float32
	// The default rate the speech synthesizer uses when speaking an utterance.
	AVSpeechUtteranceDefaultSpeechRate() float32
	// The amount of time the speech synthesizer pauses before speaking the utterance.
	PreUtteranceDelay() float64
	SetPreUtteranceDelay(value float64)
	// The amount of time the speech synthesizer pauses after speaking an utterance before handling the next utterance in the queue.
	PostUtteranceDelay() float64
	SetPostUtteranceDelay(value float64)

	// A string that contains the text for speech synthesis.
	SpeechString() string
	// An attributed string that contains the text for speech synthesis.
	AttributedSpeechString() foundation.NSAttributedString

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the AVSpeechUtterance class.

Creating an utterance

  • [IAVSpeechUtterance.InitWithString]: Creates an utterance with the text string that you specify for the speech synthesizer to speak.
  • [IAVSpeechUtterance.InitWithAttributedString]: Creates an utterance with the attributed text string that you specify for the speech synthesizer to speak.
  • [IAVSpeechUtterance.AVSpeechSynthesisIPANotationAttribute]: A string that contains International Phonetic Alphabet (IPA) symbols the speech synthesizer uses to control pronunciation of certain words or phrases.
  • [IAVSpeechUtterance.InitWithSSMLRepresentation]: Creates a speech utterance with an Speech Synthesis Markup Language (SSML) string.

Configuring an utterance

  • [IAVSpeechUtterance.Voice]: The voice the speech synthesizer uses when speaking the utterance.
  • [IAVSpeechUtterance.SetVoice]
  • [IAVSpeechUtterance.PitchMultiplier]: The baseline pitch the speech synthesizer uses when speaking the utterance.
  • [IAVSpeechUtterance.SetPitchMultiplier]
  • [IAVSpeechUtterance.Volume]: The volume the speech synthesizer uses when speaking the utterance.
  • [IAVSpeechUtterance.SetVolume]
  • [IAVSpeechUtterance.PrefersAssistiveTechnologySettings]: A Boolean that specifies whether assistive technology settings take precedence over the property values of this utterance.
  • [IAVSpeechUtterance.SetPrefersAssistiveTechnologySettings]

Configuring utterance timing

  • [IAVSpeechUtterance.Rate]: The rate the speech synthesizer uses when speaking the utterance.
  • [IAVSpeechUtterance.SetRate]
  • [IAVSpeechUtterance.AVSpeechUtteranceMinimumSpeechRate]: The minimum rate the speech synthesizer uses when speaking an utterance.
  • [IAVSpeechUtterance.AVSpeechUtteranceMaximumSpeechRate]: The maximum rate the speech synthesizer uses when speaking an utterance.
  • [IAVSpeechUtterance.AVSpeechUtteranceDefaultSpeechRate]: The default rate the speech synthesizer uses when speaking an utterance.
  • [IAVSpeechUtterance.PreUtteranceDelay]: The amount of time the speech synthesizer pauses before speaking the utterance.
  • [IAVSpeechUtterance.SetPreUtteranceDelay]
  • [IAVSpeechUtterance.PostUtteranceDelay]: The amount of time the speech synthesizer pauses after speaking an utterance before handling the next utterance in the queue.
  • [IAVSpeechUtterance.SetPostUtteranceDelay]

Inspecting utterance text

  • [IAVSpeechUtterance.SpeechString]: A string that contains the text for speech synthesis.
  • [IAVSpeechUtterance.AttributedSpeechString]: An attributed string that contains the text for speech synthesis.

See: https://developer.apple.com/documentation/AVFAudio/AVSpeechUtterance

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