com.webkitchen.eeg.analysis
Class BandMonitor

java.lang.Object
  com.webkitchen.eeg.analysis.BandMonitor

All Implemented Interfaces:

IAmplitudeGenerator, IBandSampleListener, java.util.EventListener

public class BandMonitor
extends java.lang.Object
implements IBandSampleListener, IAmplitudeGenerator

Listens for samples in a given band, calculates the amplitude average for the samples, and notifies listeners of the new average amplitude. Objects can add themselves as listeners/observers to receive copies of all new average amplitudes.

Constructor Summary

BandMonitor(int sampleSize, double tolerance, int minNotificationInterval)
Creates a new monitor that will calculate amplitude values for a filtered signal

Method Summary

void	addAmplitudeListener(IAmplitudeListener listener) Attach listener to receive notification/copies of new amplitude levels
void	receiveBand(double bandSample) Processes the sample to calculate the signal amplitude, and notifies all listeners if the difference between the new amplitude and last sent amplitude is greater than our tolerance amount, or if the number of processed values has reached our minNotificationInterval
void	removeAllAmplitudeListeners() Remove all listeners from our notification list
void	removeAmplitudeListener(IAmplitudeListener listener) Remove listener from our notification list

Methods inherited from class java.lang.Object

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

Constructor Detail

BandMonitor

public BandMonitor(int sampleSize,
                   double tolerance,
                   int minNotificationInterval)

Creates a new monitor that will calculate amplitude values for a filtered signal

Parameters:

sampleSize - the number of samples to use in our RMS calculation

tolerance - the amount of change in amplitude required before notifying listeners

minNotificationInterval - the minimum interval for notifying listeners, even if amplitude has not changed beyond tolerance amount

Method Detail

receiveBand

public void receiveBand(double bandSample)

Processes the sample to calculate the signal amplitude, and notifies all listeners if the difference between the new amplitude and last sent amplitude is greater than our tolerance amount, or if the number of processed values has reached our minNotificationInterval

Specified by:

receiveBand in interface IBandSampleListener

Parameters:

bandSample - the filtered sample value

addAmplitudeListener

public void addAmplitudeListener(IAmplitudeListener listener)

Attach listener to receive notification/copies of new amplitude levels

Specified by:

addAmplitudeListener in interface IAmplitudeGenerator

Parameters:

listener - the observer who wants to receive amplitude levels

removeAmplitudeListener

public void removeAmplitudeListener(IAmplitudeListener listener)

Remove listener from our notification list

Specified by:

removeAmplitudeListener in interface IAmplitudeGenerator

Parameters:

listener - the observer to remove

removeAllAmplitudeListeners

public void removeAllAmplitudeListeners()

Remove all listeners from our notification list

Specified by:

removeAllAmplitudeListeners in interface IAmplitudeGenerator