com.tagtraum.jipes.math

Class FFTFactory

java.lang.Object

com.tagtraum.jipes.math.FFTFactory

public abstract class FFTFactory
extends Object

Factory for FFTransforms. Using the factory allows for sliding-in a faster, perhaps native implementation (like it's done in beaTunes).

In order to use a factory other than the default factory, you need to specify its classname with the system property com.tagtraum.jipes.math.FFTFactory. I.e.

-Dcom.tagtraum.jipes.math.FFTFactory=YOUR.CLASSNAME.HERE

Author:

Hendrik Schreiber

Field Summary

Fields

Modifier and Type	Field and Description
static String	FACTORYCLASS_PROPERTY_NAME

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FFTFactory()

Method Summary

Modifier and Type	Method and Description
abstract Transform	create(int numberOfSamples) Creates an instance of the fast Fourier transform (FFT).
static FFTFactory	getInstance() Creates a factory for FFT Transform objects.

Methods inherited from class java.lang.Object

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

Field Detail

FACTORYCLASS_PROPERTY_NAME

public static final String FACTORYCLASS_PROPERTY_NAME

Constructor Detail

FFTFactory

protected FFTFactory()

Method Detail

getInstance

public static FFTFactory getInstance()

Creates a factory for FFT Transform objects.

Returns:

factory instance

create

public abstract Transform create(int numberOfSamples)

Creates an instance of the fast Fourier transform (FFT). By specifying the number of samples implementations can pre-create lookup tables to speed up the actual transform.

Parameters:

numberOfSamples - number of samples the FFT instance should be able to process

Returns:

FFT instance