mp4e

type CodecInfo struct {
	// CodecID is the sample description entry 4-character code (in the MP4
	// "stsd" box) as registered by the MP4RA; e.g. "hvc1", "avc1", "ec-3"
	CodecID string `json:"codec_id"`

	// CodecParameter specifies the decoder requirements for a media stream, as
	// specified by RFC 6381; e.g. "hvc1.2.4.L120.90" or "avc1.640028"
	CodecParameter string `json:"codec_parameter,omitempty"`

	// ProfileIDC is the codec profile IDC. The value is defined separately by
	// each codec; e.g. 2 = HEVC Main 10, 100 = AVC High
	ProfileIDC int `json:"profile_idc,omitempty"`

	// LevelIDC is the codec level IDC. The value id defined separately by each
	// codec:
	//  * Divide by 30 for HEVC, e.g. 120 → 4.0
	//  * Divide by 10 for AVC, e.g. 40  → 4.0
	LevelIDC int `json:"level_idc,omitempty"`

	// AudioChannels is the number of audio channels
	AudioChannels int `json:"audio_channels,omitempty"`

	// EC3 is set only when the codec is ec-3
	EC3 *EC3Info `json:"ec3,omitempty"`
}

type CryptScheme string

type EC3Info struct {
	// ChanMap is the custom channel map bitmask from the MP4 dec3 box
	// (ETSI TS 102 366 Table E.1.4)
	ChanMap uint16 `json:"chan_map"`

	// JOC indicates Joint Object Coding (Dolby Atmos). True when the
	// flag_ec3_extension_type_a bit is set in the MP4 dec3 box extension
	// (ETSI TS 103 420)
	JOC bool `json:"joc"`

	// ComplexityIndex is the Atmos object complexity index
	// (complexity_index_type_a from ETSI TS 103 420). Only meaningful when
	// JOC is true.
	ComplexityIndex int `json:"complexity_index,omitempty"`
}

type InitInfo struct {
}

type Mp4Info struct {
	Errors            []string      // problems found
	FragmentCount     uint64        // total number of fragments
	InitInfo          *InitInfo     // moov
	SampleCount       uint64        // total number of samples/frames
	SampleCountMax    uint64        // most number of samples in a segment
	SampleCountMin    uint64        // least number of samples in a segment
	SampleDurationMax uint64        // longest sample duration
	SampleDurationMin uint64        // shortest sample duration
	Segments          []SegmentInfo //
	Size              uint64        // file size
	Timescale         uint32        //
}

type SampleInfo struct {
	Duration uint64
	Fragment int
	Pts      uint64
}

type SegmentInfo struct {
	DtsEnd        uint64
	DtsStart      uint64
	FragmentCount uint64
	PtsEnd        uint64
	PtsStart      uint64
	SampleCount   uint64
	Samples       []*SampleInfo
	SeqEnd        uint32
	SeqStart      uint32
}