com.tagtraum.jipes.audio

Class Upsample

java.lang.Object

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

com.tagtraum.jipes.audio.Upsample

All Implemented Interfaces:

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

public class Upsample
extends AbstractSignalProcessor<AudioBuffer,AudioBuffer>

Adds zero samples (zero stuffing) in order to upsample the data. Note that proper upsampling (i.e. interpolating) has to be followed by the application of a suitable low pass filter (see Filters and Mapping) to avoid aliasing.

Author:

Hendrik Schreiber

Field Summary

Fields inherited from class com.tagtraum.jipes.AbstractSignalProcessor

lastOut, signalProcessorSupport

Constructor Summary

Constructors

Constructor and Description
Upsample() Creates an upsample processor that adds a zero for each sample.
Upsample(int factor) Creates an upsample processor with the given upsampling factor.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
int	getFactor()
int	hashCode()
protected AudioBuffer	processNext(AudioBuffer buffer) Processes the given input and returns some output.
void	setFactor(int factor) Add zeroes for every sample so that the sample rate is x-times higher than before.
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

Upsample

public Upsample(int factor)

Creates an upsample processor with the given upsampling factor.

Parameters:

factor - number of added zeros plus one (upsampling factor)

Upsample

public Upsample()

Creates an upsample processor that adds a zero for each sample.

Method Detail

getFactor

public int getFactor()

Returns:

upsampling factor

See Also:

setFactor(int)

setFactor

public void setFactor(int factor)

Add zeroes for every sample so that the sample rate is x-times higher than before. So if you specify 2, 1 zero will be added for every sample, effectively doubling the sample rate. If you specify 3, the number of samples (and thus also the samplerate) triples - for each sample two zeros are added.

Parameters:

factor - upsampling factor

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