jass.generators
Class CrossfadeLoopBuffer

java.lang.Object
  jass.engine.Out
      jass.generators.CrossfadeLoopBuffer

All Implemented Interfaces:

Source

public class CrossfadeLoopBuffer
extends Out

Provide a pitch shiftable object built of a set of recordings at particular frequencies. At any given freq. the sound is produced by pitch shifting nearby samples to this ranges and mixing them. If f is the disired freq. we find the two samples y1,2 with freq. f1 and f2 s.t. f1 < f < f2 . Both y1 and y2 are pitch shifted to f and then combined as y = (1-t)*y1_shifted + t*y2_shifted with 0

Author:

Kees van den Doel (kvdoel@cs.ubc.ca)

Field Summary

protected float	aLeft
protected int	dixLeft Current integer f of pointer in buffer per sample.
protected int	dixRight Current integer f of pointer in buffer per sample.
protected float	dxLeft Current fractional f [0 1] of pointer in buffer per sample.
protected float	dxRight Current fractional f [0 1] of pointer in buffer per sample.
protected float	f Loop f (frequency) through buffer.
protected float[]	fb Natural loop frequencies of buffers
protected float[]	gainCorrection fGAin corrections (1 if audio files are ok)
protected int	iLeft
protected int	ixLeft Current integer position of pointer in buffer.
protected int	ixRight Current integer position of pointer in buffer.
protected float	levelCorrection
protected float[][]	loopBuffer Array of buffers to loop
protected int[]	loopBufferLength Buffer lengths
protected int	nChannels
protected float	oldF
protected float[]	qFactor
float	srate Sampling rate in Hertz of Out.
float	srateLoopBuffer Sampling rate in Hertz of loaded buffers (must all be the same).
protected float	volume Playback volume.
protected float	xLeft Current fractional position [0 1] of pointer in buffer.
protected float	xRight Current fractional position [0 1] of pointer in buffer.

Fields inherited from class jass.engine.Out

buf, bufferSize, bufOld, lock

Constructor Summary

CrossfadeLoopBuffer(float srate, int bufferSize, java.lang.String[] fn, float[] fb)
Construct buffers from named files.

CrossfadeLoopBuffer(int bufferSize)
For derived classes

Method Summary

protected void	calcRates(float f)
void	computeBuffer() Compute the next buffer.
ControllerPanel	getControlPanel()
ControllerPanel	getEditorPanel(java.lang.String name)
int	getNChannels()
protected float	getNextSample(int k, int bufsz) Get next sample value, interpolating in between sample points.
protected float	getNextSampleStereo(int k, int bufsz)
float	getQ(int k)
static void	main(java.lang.String[] args)
void	setF(float f) Set loopspeed.
void	setQ(int k, float val)
void	setVolume(float val) Set force magnitude.

Methods inherited from class jass.engine.Out

clearBuffer, copyToOld, getBuffer, getBuffer, getBufferSize, getTime, peekAtBuffer, resetTime, setBufferSize, setTime, setTimeAndNotify

Methods inherited from class java.lang.Object

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

Field Detail

loopBuffer

protected float[][] loopBuffer

Array of buffers to loop

loopBufferLength

protected int[] loopBufferLength

Buffer lengths

gainCorrection

protected float[] gainCorrection

fGAin corrections (1 if audio files are ok)

volume

protected float volume

Playback volume.

f

protected float f

Loop f (frequency) through buffer.

oldF

protected float oldF

fb

protected float[] fb

Natural loop frequencies of buffers

xLeft

protected float xLeft

Current fractional position [0 1] of pointer in buffer.

xRight

protected float xRight

Current fractional position [0 1] of pointer in buffer.

ixLeft

protected int ixLeft

Current integer position of pointer in buffer.

ixRight

protected int ixRight

Current integer position of pointer in buffer.

dxLeft

protected float dxLeft

Current fractional f [0 1] of pointer in buffer per sample.

dxRight

protected float dxRight

Current fractional f [0 1] of pointer in buffer per sample.

dixLeft

protected int dixLeft

Current integer f of pointer in buffer per sample.

dixRight

protected int dixRight

Current integer f of pointer in buffer per sample.

aLeft

protected float aLeft

levelCorrection

protected float levelCorrection

qFactor

protected float[] qFactor

iLeft

protected int iLeft

srate

public float srate

Sampling rate in Hertz of Out.

srateLoopBuffer

public float srateLoopBuffer

Sampling rate in Hertz of loaded buffers (must all be the same).

nChannels

protected int nChannels

Constructor Detail

CrossfadeLoopBuffer

public CrossfadeLoopBuffer(int bufferSize)

For derived classes

Parameters:

bufferSize - biffer size

CrossfadeLoopBuffer

public CrossfadeLoopBuffer(float srate,
                           int bufferSize,
                           java.lang.String[] fn,
                           float[] fb)

Construct buffers from named files.

Parameters:

srate - sampling rate in Hertz.

bufferSize - bufferSize of this Out

fn - Audio files names.

natural - frequencies of the audio files.

Method Detail

getQ

public float getQ(int k)

setQ

public void setQ(int k,
                 float val)

getNChannels

public int getNChannels()

setVolume

public void setVolume(float val)

Set force magnitude.

Parameters:

val - Volume.

setF

public void setF(float f)

Set loopspeed.

Parameters:

f - Loop freq.

calcRates

protected void calcRates(float f)

getNextSampleStereo

protected float getNextSampleStereo(int k,
                                    int bufsz)

getNextSample

protected float getNextSample(int k,
                              int bufsz)

Get next sample value, interpolating in between sample points.

computeBuffer

public void computeBuffer()

Compute the next buffer.

Specified by:

computeBuffer in class Out

getEditorPanel

public ControllerPanel getEditorPanel(java.lang.String name)

getControlPanel

public ControllerPanel getControlPanel()

main

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

Throws:

java.lang.Exception