com.tagtraum.jipes.math

Class DCTFactory

java.lang.Object

com.tagtraum.jipes.math.DCTFactory

public abstract class DCTFactory
extends Object

Factory for DCTransforms. Using the factory allows for sliding-in a faster, perhaps native implementation.

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.DCTFactory. I.e.

-Dcom.tagtraum.jipes.math.DCTFactory=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	DCTFactory()

Method Summary

Modifier and Type	Method and Description
abstract Transform	create(int numberOfSamples) Creates an instance of the discrete cosine transform (DCT).
static DCTFactory	getInstance() Creates a factory for DCT 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

DCTFactory

protected DCTFactory()

Method Detail

getInstance

public static DCTFactory getInstance()

Creates a factory for DCT Transform objects.

Returns:

factory instance

create

public abstract Transform create(int numberOfSamples)

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

Parameters:

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

Returns:

DCT instance