at.ofai.music.beatroot
Class AudioFile

java.lang.Object
  at.ofai.music.beatroot.AudioFile

public class AudioFile
extends java.lang.Object

A simple class for reading audio data from files.

Field Summary

protected javax.sound.sampled.AudioInputStream	audioIn The stream from which audio is read (after conversion if necessary)
protected int	channels The number of channels in the audio stream
protected javax.sound.sampled.AudioFormat	format The format of the audio data
protected float	frameRate The sampling rate
protected int	frameSize The size of an audio frame (i.e.
protected long	length The amount of audio data in bytes
protected java.lang.String	path The path name of the audio file (relative or absolute)
private at.ofai.music.util.RandomAccessInputStream	underlyingStream The raw stream from which data is read

Constructor Summary

AudioFile(java.lang.String pathName)
Constructor

Method Summary

static void	main(java.lang.String[] args) Unit test for reading audio from jar file
int[]	read() Reads a mono 16-bit audio file and returns the whole file as an int array
int	read(byte[] buffer) Reads some number of bytes from the audio input stream and stores them into the buffer array.
double	setPosition(double time) Moves the read pointer to the specified time in seconds.
long	setPosition(long position) Moves the read pointer to the specified byte position.
java.lang.String	toString() Returns a String representation of the audio file, consisting of path name, length and frame size.

Methods inherited from class java.lang.Object

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

Field Detail

path

protected java.lang.String path

The path name of the audio file (relative or absolute)

underlyingStream

private at.ofai.music.util.RandomAccessInputStream underlyingStream

The raw stream from which data is read

audioIn

protected javax.sound.sampled.AudioInputStream audioIn

The stream from which audio is read (after conversion if necessary)

format

protected javax.sound.sampled.AudioFormat format

The format of the audio data

length

protected long length

The amount of audio data in bytes

frameSize

protected int frameSize

The size of an audio frame (i.e. one sample for each channel)

frameRate

protected float frameRate

The sampling rate

channels

protected int channels

The number of channels in the audio stream

Constructor Detail

AudioFile

public AudioFile(java.lang.String pathName)

Constructor

Parameters:

pathName - The relative or absolute path name of the audio file

Method Detail

toString

public java.lang.String toString()

Returns a String representation of the audio file, consisting of path name, length and frame size.

Overrides:

toString in class java.lang.Object

setPosition

public double setPosition(double time)
                   throws java.io.IOException

Moves the read pointer to the specified time in seconds.

Throws:

java.io.IOException

setPosition

public long setPosition(long position)
                 throws java.io.IOException

Moves the read pointer to the specified byte position.

Throws:

java.io.IOException

read

public int read(byte[] buffer)

Reads some number of bytes from the audio input stream and stores them into the buffer array.

Parameters:

buffer - The buffer for storing audio data

Returns:

The number of bytes read, or -1 if there is no more data (EOS)

read

public int[] read()

Reads a mono 16-bit audio file and returns the whole file as an int array

Returns:

The content of the audio file

main

public static void main(java.lang.String[] args)

Unit test for reading audio from jar file