org.monte.media.quicktime
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

Field Summary

protected int	soundBytesPerFrame The number of bytes in a frame: for uncompressed audio, an uncompressed frame; for compressed audio, a compressed frame.
protected int	soundBytesPerPacket For uncompressed audio, the number of bytes in a sample for a single channel.
protected int	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, height, inputBuffer, inputTime, matrix, mediaCompressionType, mediaCompressorName, mediaDuration, mediaTimeScale, mediaType, outputBuffer, sampleCount, sampleSizes, syncInterval, syncSamples, timeToSamples, width, writeTime

Constructor Summary

AbstractQuickTimeStream.AudioTrack()

Method Summary

protected void	writeMediaInformationHeaderAtom(AbstractQuickTimeStream.CompositeAtom minfAtom)
protected void	writeSampleDescriptionAtom(AbstractQuickTimeStream.CompositeAtom stblAtom)

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

addChunk, addSample, getSampleCount, getTrackDuration, isEmpty, writeMediaInformationAtoms, writeSampleTableAtoms, writeTrackAtoms

Methods inherited from class java.lang.Object

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

Field Detail

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 varable 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 int 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 int 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 int 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 Detail

AbstractQuickTimeStream.AudioTrack

public AbstractQuickTimeStream.AudioTrack()

Method Detail

writeMediaInformationHeaderAtom

protected void writeMediaInformationHeaderAtom(AbstractQuickTimeStream.CompositeAtom minfAtom)
                                        throws java.io.IOException

Specified by:

writeMediaInformationHeaderAtom in class AbstractQuickTimeStream.Track

Throws:

java.io.IOException

writeSampleDescriptionAtom

protected void writeSampleDescriptionAtom(AbstractQuickTimeStream.CompositeAtom stblAtom)
                                   throws java.io.IOException

Specified by:

writeSampleDescriptionAtom in class AbstractQuickTimeStream.Track

Throws:

java.io.IOException