Class AbstractQuickTimeStream.AudioTrack

java.lang.Object

org.monte.media.quicktime.AbstractQuickTimeStream.Track

org.monte.media.quicktime.AbstractQuickTimeStream.AudioTrack

Enclosing class:

AbstractQuickTimeStream

protected class AbstractQuickTimeStream.AudioTrack
extends AbstractQuickTimeStream.Track

Author:

Werner Randelshofer

Field Summary

Fields

Modifier and Type	Field	Description
protected long	soundBytesPerFrame	The number of bytes in a frame: for uncompressed audio, an uncompressed frame; for compressed audio, a compressed frame.
protected long	soundBytesPerPacket	For uncompressed audio, the number of bytes in a sample for a single channel.
protected long	soundBytesPerSample	The size of an uncompressed sample in bytes.
protected int	soundCompressionId	Sound compressionId.
protected int	soundNumberOfChannels	Number of sound channels used by the sound sample.
protected double	soundSampleRate	Sound sample rate.
protected int	soundSampleSize	Number of bits per audio sample before compression.
protected long	soundSamplesPerPacket	Sound stsd samples per packet.
protected byte[]	stsdExtensions	Extensions to the stsd chunk.

Fields inherited from class org.monte.media.quicktime.AbstractQuickTimeStream.Track

chunks, codec, editList, format, headerFlags, height, inputBuffer, inputTime, matrix, mediaCompressionType, mediaCompressorName, mediaDuration, mediaTimeScale, mediaType, outputBuffer, sampleCount, sampleSizes, syncInterval, syncSamples, timeToSamples, width, writeTime

Constructor Summary

Constructors

Constructor	Description
AudioTrack()

Method Summary

Modifier and Type	Method	Description
protected void	writeSampleDescriptionAtom(AbstractQuickTimeStream.CompositeAtom stblAtom)

Methods inherited from class org.monte.media.quicktime.AbstractQuickTimeStream.Track

addChunk, addSample, getFirstSampleTime, getSampleCount, getTrackDuration, isEmpty, isEnabled, isInMovie, isInPoster, isInPreview, setEnabled, setInMovie, setInPoster, setInPreview

Methods inherited from class java.lang.Object

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

Field Details

soundNumberOfChannels

protected int soundNumberOfChannels

Number of sound channels used by the sound sample.

soundSampleSize

protected int soundSampleSize

Number of bits per audio sample before compression.

soundCompressionId

protected int soundCompressionId

Sound compressionId. The value -1 means fixed bit rate, -2 means variable bit rate.

soundSamplesPerPacket

protected long soundSamplesPerPacket

Sound stsd samples per packet. The number of uncompressed samples generated by a compressed sample (an uncompressed sample is one sample from each channel). This is also the sample duration, expressed in the media’s timescale, where the timescale is equal to the sample rate. For uncompressed formats, this field is always 1.

soundBytesPerPacket

protected long soundBytesPerPacket

For uncompressed audio, the number of bytes in a sample for a single channel. This replaces the older sampleSize field, which is set to 16. This value is calculated by dividing the frame size by the number of channels. The same calculation is performed to calculate the value of this field for compressed audio, but the result of the calculation is not generally meaningful for compressed audio.

soundBytesPerFrame

protected long soundBytesPerFrame

The number of bytes in a frame: for uncompressed audio, an uncompressed frame; for compressed audio, a compressed frame. This can be calculated by multiplying the bytes per packet field by the number of channels.

soundBytesPerSample

protected long soundBytesPerSample

The size of an uncompressed sample in bytes. This is set to 1 for 8-bit audio, 2 for all other cases, even if the sample size is greater than 2 bytes.

soundSampleRate

protected double soundSampleRate

Sound sample rate. The integer portion must match the media's time scale.

stsdExtensions

protected byte[] stsdExtensions

Extensions to the stsd chunk. Must contain atom-based fields: ([long size, long type, some data], repeat)

Constructor Details

AudioTrack

public AudioTrack()

Method Details

writeSampleDescriptionAtom

protected void writeSampleDescriptionAtom(AbstractQuickTimeStream.CompositeAtom stblAtom)
                                   throws IOException

Specified by:

writeSampleDescriptionAtom in class AbstractQuickTimeStream.Track

Throws:

IOException