Filters

Class FastIIRFilter

java.lang.Object

Filters.FastIIRFilter

All Implemented Interfaces:

Filter

public class FastIIRFilter
extends java.lang.Object
implements Filter

Attempt at building a newer faster IIF filter - but it doesn't currently work correctly !

Author:

Doug Gillespie

Constructor Summary

Constructors

Constructor and Description
FastIIRFilter(int channel, double sampleRate, FilterParams filterParams)

Method Summary

Methods

Modifier and Type	Method and Description
int	getFilterDelay() Gets the delay of the filter - rarely used, but can be important for some processing tasks.
void	prepareFilter() Calculates the poles and zeros for the filter and sets up any memory buffers required during real time operation.
double	runFilter(double aVal) Runs the filter on a single data value
void	runFilter(double[] inputData) Runs the filter on an array of data
void	runFilter(double[] inputData, double[] outputData) Runs the filter on an array of data

Methods inherited from class java.lang.Object

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

Constructor Detail

FastIIRFilter

public FastIIRFilter(int channel,
             double sampleRate,
             FilterParams filterParams)

Method Detail

prepareFilter

public void prepareFilter()

Description copied from interface: Filter

Calculates the poles and zeros for the filter and sets up any memory buffers required during real time operation.

Specified by:

prepareFilter in interface Filter

runFilter

public void runFilter(double[] inputData)

Description copied from interface: Filter

Runs the filter on an array of data

New values overwrite the old values in the array.

Specified by:

runFilter in interface Filter

runFilter

public void runFilter(double[] inputData,
             double[] outputData)

Description copied from interface: Filter

Runs the filter on an array of data

New values write into the output data array.

Specified by:

runFilter in interface Filter

runFilter

public double runFilter(double aVal)

Description copied from interface: Filter

Runs the filter on a single data value

Specified by:

runFilter in interface Filter

Returns:

New data value

getFilterDelay

public int getFilterDelay()

Description copied from interface: Filter

Gets the delay of the filter - rarely used, but can be important for some processing tasks. For an IIRF filter, this would be half the number of poles, for a moving average or median filter it would be half the filter length.

Specified by:

getFilterDelay in interface Filter

Returns:

filter delay in samples.