org.jcodec.containers.mp4.demuxer

Class PCMMP4DemuxerTrack

java.lang.Object

org.jcodec.containers.mp4.demuxer.AbstractMP4DemuxerTrack

org.jcodec.containers.mp4.demuxer.PCMMP4DemuxerTrack

All Implemented Interfaces:

DemuxerTrack, SeekableDemuxerTrack

public class PCMMP4DemuxerTrack
extends AbstractMP4DemuxerTrack

This class is part of JCodec ( www.jcodec.org ) This software is distributed under FreeBSD License Specialized demuxer track for PCM audio samples Always reads one chunk of frames at a time, except for after seek. After seek the beginning of chunk before the seek point is not read effectivaly reading PCM frame from exactly the frame seek was performed to. Packet size depends on underlying container PCM chunk sizes.

Author:

The JCodec project

Field Summary

Fields

Modifier and Type	Field and Description
protected int	totalFrames

Fields inherited from class org.jcodec.containers.mp4.demuxer.AbstractMP4DemuxerTrack

box, chunkOffsets, curFrame, duration, pts, sampleEntries, sampleToChunks, stcoInd, stscInd, sttsInd, sttsSubInd, timescale, timeToSamples

Constructor Summary

Constructors

Constructor and Description
PCMMP4DemuxerTrack(MovieBox movie, TrakBox trak, SeekableByteChannel input)

Method Summary

Modifier and Type	Method and Description
long	getFrameCount()
int	getFrameSize()
DemuxerTrackMeta	getMeta()
MP4Packet	getNextFrame(ByteBuffer buffer)
boolean	gotoSyncFrame(long frameNo) Goes to a a frame that's a sync frame (key frame) and is prior or at frame frameNo.
Packet	nextFrame()
protected void	seekPointer(long frameNo)

Methods inherited from class org.jcodec.containers.mp4.demuxer.AbstractMP4DemuxerTrack

canSeek, convertPacket, getBox, getCurFrame, getDuration, getEdits, getFourcc, getName, getNo, getSampleEntries, getTimescale, getType, gotoFrame, nextChunk, pts2Sample, readPacketData, seek, seekPts, shiftPts

Methods inherited from class java.lang.Object

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

Field Detail

totalFrames

protected int totalFrames

Constructor Detail

PCMMP4DemuxerTrack

public PCMMP4DemuxerTrack(MovieBox movie,
                          TrakBox trak,
                          SeekableByteChannel input)

Method Detail

nextFrame

public Packet nextFrame()
                 throws IOException

Throws:

IOException

getNextFrame

public MP4Packet getNextFrame(ByteBuffer buffer)
                       throws IOException

Specified by:

getNextFrame in class AbstractMP4DemuxerTrack

Throws:

IOException

gotoSyncFrame

public boolean gotoSyncFrame(long frameNo)

Description copied from interface: SeekableDemuxerTrack

Goes to a a frame that's a sync frame (key frame) and is prior or at frame frameNo.

Parameters:

frameNo - Frame number, zero based, related to which a sync frame will be selected.

Returns:

If the operation was successful.

getFrameSize

public int getFrameSize()

seekPointer

protected void seekPointer(long frameNo)

Specified by:

seekPointer in class AbstractMP4DemuxerTrack

getFrameCount

public long getFrameCount()

Specified by:

getFrameCount in class AbstractMP4DemuxerTrack

getMeta

public DemuxerTrackMeta getMeta()

Specified by:

getMeta in interface DemuxerTrack

Overrides:

getMeta in class AbstractMP4DemuxerTrack