Package org.mp4parser.muxer.tracks

Class AbstractH26XTrack

java.lang.Object

org.mp4parser.muxer.AbstractTrack

org.mp4parser.muxer.tracks.AbstractH26XTrack

All Implemented Interfaces:

Closeable, AutoCloseable, Track

Direct Known Subclasses:

H263TrackImpl, H264TrackImpl, H265TrackImpl

public abstract class AbstractH26XTrack
extends AbstractTrack

Bundles common functionality and parsing patterns of NAL based formats such as H264(AVC) and H265 (HEVC).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AbstractH26XTrack.LookAhead

Field Summary

Fields

Modifier and Type	Field	Description
static int	BUFFER
protected List<CompositionTimeToSample.Entry>	ctts
protected long[]	decodingTimes
protected List<SampleDependencyTypeBox.Entry>	sdtp
protected List<Integer>	stss
protected TrackMetaData	trackMetaData

Constructor Summary

Constructors

Constructor	Description
AbstractH26XTrack(DataSource dataSource)
AbstractH26XTrack(DataSource dataSource, boolean tripleZeroIsEndOfSequence)

Method Summary

Modifier and Type	Method	Description
protected static InputStream	cleanBuffer(InputStream is)
void	close()
protected Sample	createSampleObject(List<? extends ByteBuffer> nals)	Builds an MP4 sample from a list of NALs.
protected ByteBuffer	findNextNal(AbstractH26XTrack.LookAhead la)
List<CompositionTimeToSample.Entry>	getCompositionTimeEntries()
protected abstract SampleEntry	getCurrentSampleEntry()
List<SampleDependencyTypeBox.Entry>	getSampleDependencies()
long[]	getSampleDurations()	Each samples is covers a small time span in a video.
long[]	getSyncSamples()
TrackMetaData	getTrackMetaData()
protected static byte[]	toArray(ByteBuffer buf)

Methods inherited from class org.mp4parser.muxer.AbstractTrack

getDuration, getEdits, getName, getSampleGroups, getSubsampleInformationBox

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mp4parser.muxer.Track

getHandler, getSampleEntries, getSamples

Field Detail

BUFFER

public static int BUFFER

decodingTimes

protected long[] decodingTimes

ctts

protected List<CompositionTimeToSample.Entry> ctts

sdtp

protected List<SampleDependencyTypeBox.Entry> sdtp

stss

protected List<Integer> stss

trackMetaData

protected TrackMetaData trackMetaData

Constructor Detail

AbstractH26XTrack

public AbstractH26XTrack(DataSource dataSource,
                         boolean tripleZeroIsEndOfSequence)

AbstractH26XTrack

public AbstractH26XTrack(DataSource dataSource)

Method Detail

cleanBuffer

protected static InputStream cleanBuffer(InputStream is)

toArray

protected static byte[] toArray(ByteBuffer buf)

getTrackMetaData

public TrackMetaData getTrackMetaData()

findNextNal

protected ByteBuffer findNextNal(AbstractH26XTrack.LookAhead la)
                          throws IOException

Throws:

IOException

getCurrentSampleEntry

protected abstract SampleEntry getCurrentSampleEntry()

createSampleObject

protected Sample createSampleObject(List<? extends ByteBuffer> nals)

Builds an MP4 sample from a list of NALs. Each NAL will be preceded by its 4 byte (unit32) length.

Parameters:

nals - a list of NALs that form the sample

Returns:

sample as it appears in the MP4 file

getSampleDurations

public long[] getSampleDurations()

Description copied from interface: Track

Each samples is covers a small time span in a video. This method returns the duration for each sample in track timescale. The array must contain exactly as many samples as Track.getSamples() contains.

Returns:

an array of ticks

getCompositionTimeEntries

public List<CompositionTimeToSample.Entry> getCompositionTimeEntries()

Specified by:

getCompositionTimeEntries in interface Track

Overrides:

getCompositionTimeEntries in class AbstractTrack

getSyncSamples

public long[] getSyncSamples()

Specified by:

getSyncSamples in interface Track

Overrides:

getSyncSamples in class AbstractTrack

getSampleDependencies

public List<SampleDependencyTypeBox.Entry> getSampleDependencies()

Specified by:

getSampleDependencies in interface Track

Overrides:

getSampleDependencies in class AbstractTrack

close

public void close()
           throws IOException

Throws:

IOException