edu.cmu.sphinx.tools.audio

Class AudioData

java.lang.Object

edu.cmu.sphinx.tools.audio.AudioData

Direct Known Subclasses:

Sinusoid

public class AudioData
extends java.lang.Object

Represents a 16bit, SIGNED_PCM, little endian audio clip with a sample rate specified by AudioFormat.

Field Summary

Fields

Modifier and Type	Field and Description
protected javax.sound.sampled.AudioFormat	format
protected java.util.List<javax.swing.event.ChangeListener>	listeners
protected int	selectionEnd
protected int	selectionStart
protected short[]	shorts

Constructor Summary

Constructors

Constructor and Description
AudioData() No-arg constructor.
AudioData(javax.sound.sampled.AudioInputStream ais) Creates a new AudioData from the given AudioInputStream, converting the data to 16bit, little endian, SIGNED_PCM if needed.
AudioData(short[] data, float sampleRate) Creates a new AudioData with the given data and sample rate.

Method Summary

Modifier and Type	Method and Description
void	addChangeListener(javax.swing.event.ChangeListener listener) Add a ChangeListener.
protected void	fireStateChanged() Notify all ChangeListeners of a change.
short[]	getAudioData() Gets the SIGNED_PCM 16 bit little endian audio data.
javax.sound.sampled.AudioFormat	getAudioFormat() Gets the audio format.
void	removeChangeListener(javax.swing.event.ChangeListener listener) Remove a ChangeListener.
void	setAudioData(short[] data) Sets the audio data and notifies all ChangeListeners.

Methods inherited from class java.lang.Object

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

Field Detail

format

protected javax.sound.sampled.AudioFormat format

shorts

protected short[] shorts

listeners

protected final java.util.List<javax.swing.event.ChangeListener> listeners

selectionStart

protected int selectionStart

selectionEnd

protected int selectionEnd

Constructor Detail

AudioData

public AudioData()

No-arg constructor. Creates an empty clip at 8kHz sample rate.

AudioData

public AudioData(short[] data,
                 float sampleRate)

Creates a new AudioData with the given data and sample rate. Expects the data to be 16bit, little endian, SIGNED_PCM.

Parameters:

data - the audio samples; one sample per element in the array

sampleRate - the sample rate in Hz

AudioData

public AudioData(javax.sound.sampled.AudioInputStream ais)
          throws java.io.IOException

Creates a new AudioData from the given AudioInputStream, converting the data to 16bit, little endian, SIGNED_PCM if needed.

Parameters:

ais - the AudioInputStream

Throws:

java.io.IOException - if problems happen when reading from ais

Method Detail

getAudioData

public short[] getAudioData()

Gets the SIGNED_PCM 16 bit little endian audio data. NOTE: this the actual array held by this object, so only use it as a reference (i.e., don't modify the contents).

Returns:

the SIGNED_PCM 16 bit little endian samples

setAudioData

public void setAudioData(short[] data)

Sets the audio data and notifies all ChangeListeners.

Parameters:

data - the new SIGNED_PCM 16 bit little endian samples

getAudioFormat

public javax.sound.sampled.AudioFormat getAudioFormat()

Gets the audio format.

Returns:

the AudioFormat for the data managed by this object

addChangeListener

public void addChangeListener(javax.swing.event.ChangeListener listener)

Add a ChangeListener.

Parameters:

listener - the listener to add

removeChangeListener

public void removeChangeListener(javax.swing.event.ChangeListener listener)

Remove a ChangeListener.

Parameters:

listener - the listener to remove

fireStateChanged

protected void fireStateChanged()

Notify all ChangeListeners of a change.