org.jitsi.impl.neomedia.codec.video.vp9

Class DePacketizer.VP9PayloadDescriptor

java.lang.Object

org.jitsi.impl.neomedia.codec.video.vp9.DePacketizer.VP9PayloadDescriptor

Enclosing class:

DePacketizer

public static class DePacketizer.VP9PayloadDescriptor
extends Object

A class that represents the VP9 Payload Descriptor structure defined in draft-ietf-payload-vp9-02

Constructor Summary

Constructors

Constructor and Description
VP9PayloadDescriptor()

Method Summary

Modifier and Type	Method and Description
static int	getSpatialLayerIndex(byte[] buf, int off, int len) Gets the spatial layer index (SID), if that's set.
static int	getTemporalLayerIndex(byte[] buf, int off, int len) Gets the temporal layer index (TID), if that's set.
static boolean	isEndOfFrame(byte[] buf, int off, int len) Returns true if the E bit from the first byte of the payload descriptor has value 0.
static boolean	isStartOfFrame(byte[] buf, int off, int len) Returns true if the B bit from the first byte of the payload descriptor has value 0.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VP9PayloadDescriptor

public VP9PayloadDescriptor()

Method Detail

isStartOfFrame

public static boolean isStartOfFrame(byte[] buf,
                                     int off,
                                     int len)

Returns true if the B bit from the first byte of the payload descriptor has value 0.

Parameters:

buf - the byte buffer that holds the VP9 payload.

off - the offset in the byte buffer where the VP9 payload starts.

len - the length of the VP9 payload.

Returns:

true if the B bit from the first byte of the payload descriptor has value 0, false otherwise.

isEndOfFrame

public static boolean isEndOfFrame(byte[] buf,
                                   int off,
                                   int len)

Returns true if the E bit from the first byte of the payload descriptor has value 0.

Parameters:

buf - the byte buffer that holds the VP9 payload.

off - the offset in the byte buffer where the VP9 payload starts.

len - the length of the VP9 payload.

Returns:

true if the E bit from the first byte of the payload descriptor has value 0, false otherwise.

getTemporalLayerIndex

public static int getTemporalLayerIndex(byte[] buf,
                                        int off,
                                        int len)

Gets the temporal layer index (TID), if that's set.

Parameters:

buf - the byte buffer that holds the VP9 payload.

off - the offset in the byte buffer where the VP9 payload starts.

len - the length of the VP9 payload.

Returns:

the temporal layer index (TID), if that's set, -1 otherwise.

getSpatialLayerIndex

public static int getSpatialLayerIndex(byte[] buf,
                                       int off,
                                       int len)

Gets the spatial layer index (SID), if that's set.

Parameters:

buf - the byte buffer that holds the VP9 payload.

off - the offset in the byte buffer where the VP9 payload starts.

len - the length of the VP9 payload.

Returns:

the spatial layer index (SID), if that's set, -1 otherwise.