codecmunger

package

v1.13.10 Latest Latest Go to latest Published: Oct 14, 2026 License: Apache-2.0 Imports: 7 Imported by: 0

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github.com/livekit/livekit-server

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Documentation ¶

Index ¶

Constants
Variables
type CodecMunger
type DDTemporal
- func NewDDTemporal(mimeType mime.MimeType, logger logger.Logger) *DDTemporal
type Null
- func NewNull(_logger logger.Logger) *Null
type VP8
- func NewVP8(logger logger.Logger) *VP8
- func NewVP8FromOther(cm CodecMunger, logger logger.Logger) *VP8
type VP8PictureIdWrapHandler

Constants ¶

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const MaxHeaderSize = 8

MaxHeaderSize is the largest codec header the mungers produce (VP8: 6 bytes).

Variables ¶

View Source

var (
	ErrNotVP8                          = errors.New("not VP8")
	ErrOutOfOrderVP8PictureIdCacheMiss = errors.New("out-of-order VP8 picture id not found in cache")
	ErrFilteredTemporalLayer           = errors.New("filtered temporal layer")
	ErrFilteredOutOfOrder              = errors.New("filtered out-of-order packet")
)

Functions ¶

This section is empty.

Types ¶

type CodecMunger ¶

type CodecMunger interface {
	GetState() any
	SeedState(state any)

	SetLast(extPkt *buffer.ExtPacket)
	UpdateOffsets(extPkt *buffer.ExtPacket)

	// UpdateAndGet returns the incoming codec header size and the munged
	// header by value, so the per-packet path does not allocate.
	UpdateAndGet(extPkt *buffer.ExtPacket, snOutOfOrder bool, snHasGap bool, maxTemporal int32) (int, [MaxHeaderSize]byte, int, error)

	UpdateAndGetPadding(newPicture bool) ([]byte, error)
}

type DDTemporal ¶ added in v1.13.10

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

DDTemporal filters the temporal layers of a simulcast stream with the dependency descriptor, for any codec: it leaves the payload unchanged. Every packet names its frame and temporal layer, so the munger decides once per frame and applies that decision to all packets of the frame, a late one included. For VP8, libwebrtc sends a one byte payload descriptor with the dependency descriptor, so there is no picture ID to munge; the forwarder uses the VP8 munger for a stream that keeps picture IDs.

func NewDDTemporal ¶ added in v1.13.10

func NewDDTemporal(mimeType mime.MimeType, logger logger.Logger) *DDTemporal

func (*DDTemporal) GetState ¶ added in v1.13.10

func (v *DDTemporal) GetState() any

func (*DDTemporal) SeedState ¶ added in v1.13.10

func (v *DDTemporal) SeedState(_state any)

func (*DDTemporal) SetLast ¶ added in v1.13.10

func (v *DDTemporal) SetLast(_extPkt *buffer.ExtPacket)

func (*DDTemporal) UpdateAndGet ¶ added in v1.13.10

func (v *DDTemporal) UpdateAndGet(extPkt *buffer.ExtPacket, snOutOfOrder bool, _snHasGap bool, maxTemporalLayer int32) (int, [MaxHeaderSize]byte, int, error)

func (*DDTemporal) UpdateAndGetPadding ¶ added in v1.13.10

func (v *DDTemporal) UpdateAndGetPadding(_newPicture bool) ([]byte, error)

func (*DDTemporal) UpdateOffsets ¶ added in v1.13.10

func (v *DDTemporal) UpdateOffsets(_extPkt *buffer.ExtPacket)

type Null ¶

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

func NewNull ¶

func NewNull(_logger logger.Logger) *Null

func (*Null) GetSeededState ¶

func (n *Null) GetSeededState() any

func (*Null) GetState ¶

func (n *Null) GetState() any

func (*Null) SeedState ¶

func (n *Null) SeedState(state any)

func (*Null) SetLast ¶

func (n *Null) SetLast(_extPkt *buffer.ExtPacket)

func (*Null) UpdateAndGet ¶

func (n *Null) UpdateAndGet(_extPkt *buffer.ExtPacket, snOutOfOrder bool, snHasGap bool, maxTemporal int32) (int, [MaxHeaderSize]byte, int, error)

func (*Null) UpdateAndGetPadding ¶

func (n *Null) UpdateAndGetPadding(newPicture bool) ([]byte, error)

func (*Null) UpdateOffsets ¶

func (n *Null) UpdateOffsets(_extPkt *buffer.ExtPacket)

type VP8 ¶

type VP8 struct {
	// contains filtered or unexported fields
}

func NewVP8 ¶

func NewVP8(logger logger.Logger) *VP8

func NewVP8FromOther ¶ added in v1.9.11

func NewVP8FromOther(cm CodecMunger, logger logger.Logger) *VP8

func (*VP8) GetState ¶

func (v *VP8) GetState() any

func (*VP8) PictureIdOffset ¶

func (v *VP8) PictureIdOffset(extPictureId int32) (int32, bool)

for testing only

func (*VP8) SeedState ¶

func (v *VP8) SeedState(seed any)

func (*VP8) SetLast ¶

func (v *VP8) SetLast(extPkt *buffer.ExtPacket)

func (*VP8) UpdateAndGet ¶

func (v *VP8) UpdateAndGet(extPkt *buffer.ExtPacket, snOutOfOrder bool, snHasGap bool, maxTemporalLayer int32) (int, [MaxHeaderSize]byte, int, error)

func (*VP8) UpdateAndGetPadding ¶

func (v *VP8) UpdateAndGetPadding(newPicture bool) ([]byte, error)

func (*VP8) UpdateOffsets ¶

func (v *VP8) UpdateOffsets(extPkt *buffer.ExtPacket)

type VP8PictureIdWrapHandler ¶

type VP8PictureIdWrapHandler struct {
	// contains filtered or unexported fields
}

func (*VP8PictureIdWrapHandler) Init ¶

func (v *VP8PictureIdWrapHandler) Init(extPictureId int32, mBit bool)

func (*VP8PictureIdWrapHandler) MaxPictureId ¶

func (v *VP8PictureIdWrapHandler) MaxPictureId() int32

func (*VP8PictureIdWrapHandler) Unwrap ¶

func (v *VP8PictureIdWrapHandler) Unwrap(pictureId uint16, mBit bool) int32

unwrap picture id and update the maxPictureId. return unwrapped value

func (*VP8PictureIdWrapHandler) UpdateMaxPictureId ¶

func (v *VP8PictureIdWrapHandler) UpdateMaxPictureId(extPictureId int32, mBit bool)

Source Files ¶

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