org.android.activityminer.logic.filter
Class NullFilter

java.lang.Object
  org.android.activityminer.logic.filter.NullFilter

All Implemented Interfaces:

LowPassFilter

public final class NullFilter
extends Object
implements LowPassFilter

Implementation of a null filter, which does just return the original signal.

Field Summary

static NullFilter

NULLFILTER Global singleton null filter instance

Constructor Summary

private

NullFilter() Constructor

Method Summary

void	apply(List<Double> x, List<Double> y, List<Double> z, List<Long> ts) Does apply this filter to an accelerometer time series stream.
double[]	lowPass(double[] x, double[] y, long currentTs) The filter function.
void	reset() Does reset the filter
void	setCutOffFrequency(double cf) Setter for the cut-off frequency
void	updateConfiguration(RuntimeConfiguration config) Does update the filter settings by the given configuration.

Methods inherited from class java.lang.Object

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

Field Detail

NULLFILTER

public static final NullFilter NULLFILTER

Global singleton null filter instance

Constructor Detail

NullFilter

private NullFilter()

Constructor

Method Detail

lowPass

public final double[] lowPass(double[] x,
                              double[] y,
                              long currentTs)

Description copied from interface: LowPassFilter

The filter function.

Specified by:

lowPass in interface LowPassFilter

Parameters:

x - the actual input signal

y - the last output signal

currentTs - the current time stamp

Returns:

the current output signal

apply

public final void apply(List<Double> x,
                        List<Double> y,
                        List<Double> z,
                        List<Long> ts)

Description copied from interface: LowPassFilter

Does apply this filter to an accelerometer time series stream.

Specified by:

apply in interface LowPassFilter

Parameters:

x - the x axis signal stream

y - the y axis signal stream

z - the z axis signal stream

ts - the time stamps

updateConfiguration

public final void updateConfiguration(RuntimeConfiguration config)

Description copied from interface: LowPassFilter

Does update the filter settings by the given configuration.

Specified by:

updateConfiguration in interface LowPassFilter

Parameters:

config - the configuration to update from.

reset

public void reset()

Description copied from interface: LowPassFilter

Does reset the filter

Specified by:

reset in interface LowPassFilter

setCutOffFrequency

public void setCutOffFrequency(double cf)

Description copied from interface: LowPassFilter

Setter for the cut-off frequency

Specified by:

setCutOffFrequency in interface LowPassFilter

Parameters:

cf - the cut-off frequencyy