com.tagtraum.jipes.audio

Class DCT

java.lang.Object

com.tagtraum.jipes.AbstractSignalProcessor<AudioBuffer,LinearFrequencySpectrum>

com.tagtraum.jipes.audio.DCT

All Implemented Interfaces:

SignalProcessor<AudioBuffer,LinearFrequencySpectrum>, SignalPullProcessor<AudioBuffer,LinearFrequencySpectrum>, SignalSource<LinearFrequencySpectrum>

public class DCT
extends AbstractSignalProcessor<AudioBuffer,LinearFrequencySpectrum>

Transforms samples obtained with AudioBuffer.getData() using the DCT. The result will be a LinearFrequencySpectrum, containing the real part and methods for accessing all kinds of other goodies.
Should the number of samples fed into this processor not be a power of two, the sample array will be zero padded at the end before applying the DCT.

The returned AudioSpectrum object is re-used. If you need to hold on to it for longer than the current method call, you must either Object.clone() it or create a copy using a copy constructor like LinearFrequencySpectrum.LinearFrequencySpectrum(LinearFrequencySpectrum).

Author:

Hendrik Schreiber

See Also:

DCTFactory, FFT

Field Summary

Fields inherited from class com.tagtraum.jipes.AbstractSignalProcessor

lastOut, signalProcessorSupport

Constructor Summary

Constructors

Constructor and Description
DCT()
DCT(int length)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
int	hashCode()
protected LinearFrequencySpectrum	processNext(AudioBuffer buffer) Processes the given input and returns some output.
String	toString()

Methods inherited from class com.tagtraum.jipes.AbstractSignalProcessor

connectTo, connectTo, connectTo, disconnectFrom, flush, getConnectedProcessors, getConnectedSource, getId, getOutput, process, read, reset, setId

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DCT

public DCT(int length)

Parameters:

length - minimum size of the array to transform - shorter buffers will be zero padded

DCT

public DCT()

Method Detail

processNext

protected LinearFrequencySpectrum processNext(AudioBuffer buffer)
                                       throws IOException

Description copied from class: AbstractSignalProcessor

Processes the given input and returns some output.

Specified by:

processNext in class AbstractSignalProcessor<AudioBuffer,LinearFrequencySpectrum>

Parameters:

buffer - input guaranteed not to be null.

Returns:

output produced by this processor

Throws:

IOException - if an IO error occurs

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object