net.sf.jack4j.util.file.wav
Class WavFileReader

java.lang.Object
  net.sf.jack4j.util.file.wav.WavFileReader

public class WavFileReader
extends java.lang.Object

Allows read-only access to WAV file.

The class uses dedicated FileChannel instance that must be passed to the constructor and may not be used by anyone else.

Author:

repa

Constructor Summary

WavFileReader(java.nio.channels.FileChannel fileChannel)

Method Summary

int	getAvgBytesPerSecond()
int	getBitsPerSample()
int	getBlockAlign()
int	getChannelCount()
int	getSamplesPerSecond()
int	readSamples(java.nio.ByteBuffer[] channelBuffers, int nframes) Reads samples from WAV file, starting at current position, and writes them to specified buffers.

Methods inherited from class java.lang.Object

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

Constructor Detail

WavFileReader

public WavFileReader(java.nio.channels.FileChannel fileChannel)
              throws java.io.IOException

Throws:

java.io.IOException

Method Detail

readSamples

public int readSamples(java.nio.ByteBuffer[] channelBuffers,
                       int nframes)
                throws java.io.IOException

Reads samples from WAV file, starting at current position, and writes them to specified buffers.

Buffers in the given array are used for corresponding channels. If the array element at index i is null, the channel i will not be processed. If the array has less elements than the number of channels, channels with higher numbers will not be processed. If the array has more elements than the number of channels, zero samples (0.0f) will be put into unused buffers.

Returns:

number of samples read

Throws:

java.io.IOException

getBitsPerSample

public int getBitsPerSample()

Returns:

the bitsPerSample

getSamplesPerSecond

public int getSamplesPerSecond()

Returns:

the samplesPerSecond

getChannelCount

public int getChannelCount()

Returns:

the channelCount

getBlockAlign

public int getBlockAlign()

Returns:

the blockAlign

getAvgBytesPerSecond

public int getAvgBytesPerSecond()

Returns:

the avgBytesPerSecond