Class ARF1LPFOnePole

java.lang.Object

com.io7m.aradine.filter.recursive1.ARF1LPFOnePole

public final class ARF1LPFOnePole
extends Object

A trivial, recursive, one-pole low pass filter. Filter instances are stateful (they store the most recently processed output frame) and therefore each instance should only be used on a single audio stream.

See Also:

• "https://www.dspguide.com/ch19.htm"

Constructor Summary

Constructors

Constructor	Description
ARF1LPFOnePole()	Create a new filter.

Method Summary

Modifier and Type	Method	Description
double	processOneFrame(double input)	Process a single input frame.
void	processOneFrameBuffers(int frame, DoubleBuffer input, DoubleBuffer output)	Apply a filter to the given frame in the input buffer, writing the filtered frame to the corresponding frame of the output buffer.
void	setCutoff(double newCutoff)	Specify a new frequency cutoff value.

Methods inherited from class Object

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

Constructor Details

ARF1LPFOnePole

public ARF1LPFOnePole()

Create a new filter.

Method Details

setCutoff

public void setCutoff(double newCutoff)

Specify a new frequency cutoff value.

This a value in the range [0, 1] where 0 effectively blocks all frequencies, 0.5 blocks roughly half of the higher frequency spectrum, and 1.0 blocks nothing.

Parameters:

newCutoff - The cutoff

processOneFrameBuffers

public void processOneFrameBuffers(int frame,
 DoubleBuffer input,
 DoubleBuffer output)

Apply a filter to the given frame in the input buffer, writing the filtered frame to the corresponding frame of the output buffer.

Parameters:

frame - The frame index

input - The input buffer

output - The output buffer

processOneFrame

public double processOneFrame(double input)

Process a single input frame.

Parameters:

input - The input frame

Returns:

The output frame