Class Vp8Depacketizer

Puts VP8 frames together from RTP packets, RFC 7741: the packets of a frame share a timestamp, the first starts partition 0, and the last has the marker bit. Packets may come out of order; frames are given in order.

Inheritance

object

Vp8Depacketizer

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Uniform.Matrix.WebRtc.Rtp

Assembly: Uniform.Matrix.WebRtc.dll

Syntax

public sealed class Vp8Depacketizer

Remarks

A frame waits while packets before it may still come, until the newest packet is a reorder window past the gap: then they count as lost. While a keyframe is needed, a complete one does not wait, as it decodes on its own. A frame after lost packets cannot be decoded, as it predicts from the frames before; from then on only a keyframe is given, and NeedsKeyframe tells the caller to ask the sender for one, e.g. with an RTCP PLI.

Constructors

Vp8Depacketizer(int, byte?)

Puts VP8 frames together from RTP packets, RFC 7741: the packets of a frame share a timestamp, the first starts partition 0, and the last has the marker bit. Packets may come out of order; frames are given in order.

Declaration

public Vp8Depacketizer(int reorderWindow = 64, byte? orientationId = null)

Parameters

Type	Name	Description
int	reorderWindow	How many packets past a gap may arrive before the missing ones count as lost.
byte?	orientationId	The header extension ID of the video orientation, whose rotation the frames carry from their last packet; null when not used.

Remarks

A frame waits while packets before it may still come, until the newest packet is a reorder window past the gap: then they count as lost. While a keyframe is needed, a complete one does not wait, as it decodes on its own. A frame after lost packets cannot be decoded, as it predicts from the frames before; from then on only a keyframe is given, and NeedsKeyframe tells the caller to ask the sender for one, e.g. with an RTCP PLI.

Properties

NeedsKeyframe

Whether the frames given so far do not let the next inter frame decode, as at the start or after a loss: only a keyframe will be given.

Declaration

public bool NeedsKeyframe { get; }

Property Value

Type	Description
bool

Methods

Push(RtpPacket)

Take a packet; return the frames that are now ready in order, usually none or one.

Declaration

public IReadOnlyList<Vp8EncodedFrame> Push(RtpPacket packet)

Parameters

Type	Name	Description
RtpPacket	packet

Returns

Type	Description
IReadOnlyList<Vp8EncodedFrame>