jass.generators
Class LoopBuffer

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

All Implemented Interfaces:

Source

Direct Known Subclasses:

ErraticLoopBuffer, OneShotBuffer

public class LoopBuffer
extends Out

A force model based on looping through a buffer, loaded from an audio file/url or provided by caller.

Author:

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

Field Summary

protected int	dix Current integer speed of pointer in buffer per sample.
protected float	dx Current fractional speed [0 1] of pointer in buffer per sample.
protected int	ix Current integer position of pointer in buffer.
protected float[]	loopBuffer Buffer to loop
protected int	loopBufferLength Buffer length
protected float	speed Loop speed through buffer in seconds per second.
float	srate Sampling rate in Hertz of Out.
float	srateLoopBuffer Sampling rate in Hertz of loaded buffer.
protected float	volume Playback volume.
protected float	x Current fractional position [0 1] of pointer in buffer.

Fields inherited from class jass.engine.Out

buf, bufferSize

Constructor Summary

LoopBuffer(float srate, int bufferSize, float[] loopBuffer)
Construct loop force and provide buffer at same sampling rate.

LoopBuffer(float srate, int bufferSize, java.lang.String fn)
Construct loop force from named file.

LoopBuffer(float srate, int bufferSize, java.net.URL url)
Construct loop force from named URL.

LoopBuffer(int bufferSize)
For derived classes

Method Summary

void	computeBuffer() Compute the next buffer.
float[]	getLoopBuffer() Get the loopbuffer as array.
protected float	getNextSample() Get next sample value, interpolating in between sample points.
void	setSpeed(float speed) Set loopspeed.
void	setVolume(float val) Set force magnitude.

Methods inherited from class jass.engine.Out

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

Methods inherited from class java.lang.Object

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

Field Detail

loopBuffer

protected float[] loopBuffer

Buffer to loop

loopBufferLength

protected int loopBufferLength

Buffer length

volume

protected float volume

Playback volume.

speed

protected float speed

Loop speed through buffer in seconds per second.

x

protected float x

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

ix

protected int ix

Current integer position of pointer in buffer.

dx

protected float dx

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

dix

protected int dix

Current integer speed of pointer in buffer per sample.

srate

public float srate

Sampling rate in Hertz of Out.

srateLoopBuffer

public float srateLoopBuffer

Sampling rate in Hertz of loaded buffer.

Constructor Detail

LoopBuffer

public LoopBuffer(int bufferSize)

For derived classes

Parameters:

bufferSize - biffer size

LoopBuffer

public LoopBuffer(float srate,
                  int bufferSize,
                  java.lang.String fn)

Construct loop force from named file.

Parameters:

srate - sampling rate in Hertz.

bufferSize - bufferSize of this Out

fn - Audio file name.

LoopBuffer

public LoopBuffer(float srate,
                  int bufferSize,
                  java.net.URL url)

Construct loop force from named URL.

Parameters:

srate - sampling rate in Hertz.

bufferSize - bufferSize of this Out

url - Audio file url name.

LoopBuffer

public LoopBuffer(float srate,
                  int bufferSize,
                  float[] loopBuffer)

Construct loop force and provide buffer at same sampling rate.

Parameters:

srate - sampling rate in Hertz.

bufferSize - bufferSize of this Out.

loopBuffer - looping buffer.

Method Detail

getLoopBuffer

public float[] getLoopBuffer()

Get the loopbuffer as array.

Returns:

The containing loopbuffer

setVolume

public void setVolume(float val)

Set force magnitude.

Parameters:

val - Volume.

setSpeed

public void setSpeed(float speed)

Set loopspeed.

Parameters:

speed - Loop speed., 1 corresponding to original recorded speed.

getNextSample

protected float getNextSample()

Get next sample value, interpolating in between sample points.

computeBuffer

public void computeBuffer()

Compute the next buffer.

Specified by:

computeBuffer in class Out