Package ipsk.audio.dsp

Class AudioSampleProcessor

java.lang.Object

ipsk.audio.dsp.AudioSampleProcessor

Direct Known Subclasses:

AudioFrameProcessor, AudioSampleProcessorTest.AudioSampleProcessorImpl

public abstract class AudioSampleProcessor
extends java.lang.Object

Calculates amplitude values for an audio sample.

Author:

K.Jaensch, klausj@phonetik.uni-muenchen.de

Field Summary

Fields

Modifier and Type	Field	Description
protected javax.sound.sampled.AudioFormat.Encoding	ae
protected javax.sound.sampled.AudioFormat	af
static double	AUDITORY_THRESHOLD
protected boolean	bigEndian
protected int	channels
static double	DEFAULT_0DB_SOUND_PRESSURE
protected int	frameSize
protected double	maxValue
protected double	minValue
protected double	pp
protected int	resolutionBits
protected int	sampleSize
protected boolean	signed

Constructor Summary

Constructors

Constructor	Description
AudioSampleProcessor()	Creates new audio sample processor.
AudioSampleProcessor(javax.sound.sampled.AudioFormat af)	Creates new audio sample processor.

Method Summary

Modifier and Type	Method	Description
double	amplitudeToSoundPressure(double ampl)
void	encodeValue(double f, byte[] buf, int offset)	Encodes double values into byte array.
int	getChannels()
double	getDoubleValue(byte[] sample, int offset)	Returns the double value (amplitude) of the given data.
byte[]	getEncodedValue(double f)	Encodes normalized double values to byte array.
float	getFloatValue(byte[] sample)	Returns the normalized float value (amplitude) of the given sample.
float	getFloatValue(byte[] sample, int offset)	Returns the normalized float value (amplitude) of the given data.
int	getFrameSize()
double	getNormalizedValue(byte[] sample)	Returns the normalized double value (amplitude) of the given sample.
double	getNormalizedValue(byte[] sample, int offset)	Returns the float value (amplitude) of the given data.
int	getSampleSize()
void	setAudioFormat(javax.sound.sampled.AudioFormat af)	Sets audio format of the samples to process.

Methods inherited from class java.lang.Object

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

Field Detail

AUDITORY_THRESHOLD

public static final double AUDITORY_THRESHOLD

See Also:

Constant Field Values

DEFAULT_0DB_SOUND_PRESSURE

public static final double DEFAULT_0DB_SOUND_PRESSURE

See Also:

Constant Field Values

af

protected javax.sound.sampled.AudioFormat af

ae

protected javax.sound.sampled.AudioFormat.Encoding ae

bigEndian

protected boolean bigEndian

signed

protected boolean signed

channels

protected int channels

frameSize

protected int frameSize

sampleSize

protected int sampleSize

maxValue

protected double maxValue

minValue

protected double minValue

resolutionBits

protected int resolutionBits

pp

protected double pp

Constructor Detail

AudioSampleProcessor

public AudioSampleProcessor()

Creates new audio sample processor.

AudioSampleProcessor

public AudioSampleProcessor(javax.sound.sampled.AudioFormat af)
                     throws AudioFormatNotSupportedException

Creates new audio sample processor.

Parameters:

af - audio format of the samples to process

Throws:

AudioFormatNotSupportedException

Method Detail

setAudioFormat

public void setAudioFormat(javax.sound.sampled.AudioFormat af)
                    throws AudioFormatNotSupportedException

Sets audio format of the samples to process.

Parameters:

af - audio format of the samples

Throws:

AudioFormatNotSupportedException

getNormalizedValue

public double getNormalizedValue(byte[] sample)

Returns the normalized double value (amplitude) of the given sample.

Parameters:

sample -

Returns:

normalized value (-1.0 ... +1.0)

getFloatValue

public float getFloatValue(byte[] sample)

Returns the normalized float value (amplitude) of the given sample.

Parameters:

sample - audio sample data buffer

Returns:

double value (-0.5 ... +0.5)

getDoubleValue

public double getDoubleValue(byte[] sample,
                             int offset)

Returns the double value (amplitude) of the given data.

Parameters:

sample - audio sample data buffer

offset - offset in the buffer

Returns:

double value

getNormalizedValue

public double getNormalizedValue(byte[] sample,
                                 int offset)

Returns the float value (amplitude) of the given data.

Parameters:

sample - audio sample data buffer

offset - offset in the buffer

Returns:

normalized float value (-1.0 ... +1.0)

getFloatValue

public float getFloatValue(byte[] sample,
                           int offset)

Returns the normalized float value (amplitude) of the given data.

Parameters:

sample - audio sample data buffer

offset - offset in the buffer

Returns:

normalized float value (-0.5 ... +0.5)

encodeValue

public void encodeValue(double f,
                        byte[] buf,
                        int offset)

Encodes double values into byte array.

Parameters:

f - normalized amplitude value (-1.0 ... 1.0)

buf - target data buffer

offset - offset in the buffer

amplitudeToSoundPressure

public double amplitudeToSoundPressure(double ampl)

getEncodedValue

public byte[] getEncodedValue(double f)

Encodes normalized double values to byte array.

Parameters:

f - normalized amplitude value (-1.0 ... 1.0)

Returns:

encoded buffer

getChannels

public int getChannels()

getFrameSize

public int getFrameSize()

getSampleSize

public int getSampleSize()