com.tagtraum.jipes.audio

Class Downsample

java.lang.Object

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

com.tagtraum.jipes.audio.Downsample

All Implemented Interfaces:

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

public class Downsample
extends AbstractSignalProcessor<AudioBuffer,AudioBuffer>

Drops samples in order to downsample the data. Note that proper downsampling (i.e. decimating) has to be preceded by the application of a suitable low pass filter (see Filters and Mapping) to avoid aliasing.

Date: Jul 22, 2010 Time: 2:38:54 PM

Author:

Hendrik Schreiber

See Also:

Decimate

Field Summary

Fields inherited from class com.tagtraum.jipes.AbstractSignalProcessor

lastOut, signalProcessorSupport

Constructor Summary

Constructors

Constructor and Description
Downsample() Creates a downsample processor that drops/keeps every second frame.
Downsample(int nthFrameToKeep) Keeps every nth frame, drops all other frames.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
int	getNthFrameToKeep()
int	hashCode()
protected AudioBuffer	processNext(AudioBuffer buffer) Processes the given input and returns some output.
void	setNthFrameToKeep(int nthFrameToKeep) Every nthFrameToKeepth frame will be kept.
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

Downsample

public Downsample(int nthFrameToKeep)

Keeps every nth frame, drops all other frames.

Parameters:

nthFrameToKeep - nth frame to keep

Downsample

public Downsample()

Creates a downsample processor that drops/keeps every second frame.

Method Detail

getNthFrameToKeep

public int getNthFrameToKeep()

Returns:

frame to keep

See Also:

setNthFrameToKeep(int)

setNthFrameToKeep

public void setNthFrameToKeep(int nthFrameToKeep)

Every nthFrameToKeepth frame will be kept. So if you specify 2, every 2nd frame will be kept. If you specify 3, every third frame will be kept - leading to a sample rate reduction of, e.g. 44100 to 44100/3 = 14700.

Parameters:

nthFrameToKeep - frame to keep

processNext

protected AudioBuffer processNext(AudioBuffer buffer)

Description copied from class: AbstractSignalProcessor

Processes the given input and returns some output.

Specified by:

processNext in class AbstractSignalProcessor<AudioBuffer,AudioBuffer>

Parameters:

buffer - input guaranteed not to be null.

Returns:

output produced by this processor

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