fftManager
Class PamFFTProcess

java.lang.Object
  PamguardMVC.PamProcess
      fftManager.PamFFTProcess

All Implemented Interfaces:

Annotator, PamObserver

public class PamFFTProcess
extends PamProcess

Author:

Doug Gillespie PamFFTProcess is a extends the PamProcess superclass
Main processing class to calculate FFT data.
Modified October 13 2009 to correctly interleave data from > 1 channel rather then sending data out in chunks corresponding to individual input raw data which is packed as single channels
PamFFTProcess is then notified when new chunks of raw data have been generated (e.g. by reading from a file or taking input from a sound card). It then processes the data to produce blocks of overlapping FFT data which are used to create a new PamDataUnit that is sent to be included in a new PamDataBlock of type PamFFTDataBlock

Nested Class Summary

(package private) class

PamFFTProcess.TempOutputStore

Field Summary

private int[]	channelCounts
(package private) int[]	channelPointer
private ClickRemoval	clickRemoval
private double[]	dataToFFT
private FastFFT	fastFFT
private java.util.Vector<Annotation>	fftAnnotations
private int[]	fftBlocks
private PamFFTControl	fftControl
private Complex[]	fftData
private int	fftOverlap
private double[]	fftRealBlock
private long[]	lastChannelMillis
private int	logFftLength
private FFTDataBlock	outputData
private int[]	rawBlocks
private PamRawDataBlock	rawDataBlock
private PamFFTProcess.TempOutputStore[]	tempStores
private double[][]	windowedData
private double[]	windowFunction

Fields inherited from class PamguardMVC.PamProcess

outputDataBlocks, processName, sampleRate

Constructor Summary

PamFFTProcess(PamFFTControl pamControlledUnit, PamDataBlock parentDataBlock)

Method Summary

Annotation	getAnnotation(PamDataBlock pamDataBlock, int annotation) Get an Annotation
int	getChannelMap()
PamFFTControl	getFftControl()
int	getFftHop()
int	getFftLength()
int	getNumAnnotations(PamDataBlock pamDataBlock)
FFTDataBlock	getOutputData()
long	getRequiredDataHistory(PamObservable o, java.lang.Object arg)
void	makeAnnotations()
void	newData(PamObservable obs, PamDataUnit pamRawData)
void	pamStart() Called for each process to tell it to start (may not be necessary for processes which are listening for data anyway.
void	pamStop() Stops the process.
void	setupFFT()

Methods inherited from class PamguardMVC.PamProcess

absMillisecondsToSamples, absSamplesToMilliseconds, addOutputDataBlock, changedThreading, clearOldData, createAnnotations, destroyProcess, fillXMLElement, fillXMLParameters, getAncestorDataBlock, getBackendProcess, getChainPosition, getCpuPercent, getNumOutputDataBlocks, getObserverName, getObserverObject, getOfflineData, getOutputDataBlock, getPamControlledUnit, getParentDataBlock, getParentProcess, getProcessName, getRawSourceDataBlock, getSampleRate, getSourceDataBlock, getSourceProcess, isCanMultiThread, makePamProcess, masterClockUpdate, noteNewSettings, notifyModelChanged, prepareProcess, relMillisecondsToSamples, relSamplesToMilliseconds, removeObservable, removeOutputDatablock, saveViewerData, setBackendProcess, setCanMultiThread, setParentDataBlock, setParentDataBlock, setProcessName, setSampleRate, setupProcess, toString, update, updateData

Methods inherited from class java.lang.Object

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

Field Detail

logFftLength

private int logFftLength

fftOverlap

private int fftOverlap

channelPointer

int[] channelPointer

windowFunction

private double[] windowFunction

windowedData

private double[][] windowedData

dataToFFT

private double[] dataToFFT

fftData

private Complex[] fftData

fftRealBlock

private double[] fftRealBlock

fftControl

private PamFFTControl fftControl

clickRemoval

private ClickRemoval clickRemoval

rawBlocks

private int[] rawBlocks

fftBlocks

private int[] fftBlocks

channelCounts

private int[] channelCounts

outputData

private FFTDataBlock outputData

tempStores

private PamFFTProcess.TempOutputStore[] tempStores

lastChannelMillis

private long[] lastChannelMillis

fastFFT

private FastFFT fastFFT

fftAnnotations

private java.util.Vector<Annotation> fftAnnotations

rawDataBlock

private PamRawDataBlock rawDataBlock

Constructor Detail

PamFFTProcess

public PamFFTProcess(PamFFTControl pamControlledUnit,
                     PamDataBlock parentDataBlock)

Method Detail

setupFFT

public void setupFFT()

getFftLength

public int getFftLength()

getFftHop

public int getFftHop()

getChannelMap

public int getChannelMap()

newData

public void newData(PamObservable obs,
                    PamDataUnit pamRawData)

Overrides:

newData in class PamProcess

getRequiredDataHistory

public long getRequiredDataHistory(PamObservable o,
                                   java.lang.Object arg)

Specified by:

getRequiredDataHistory in interface PamObserver

Overrides:

getRequiredDataHistory in class PamProcess

Parameters:

o - PamObservable class requiring the data

arg - optional argument from PamObservable

Returns:

time in milliseconds requried by data held in PamObservable

pamStart

public void pamStart()

Description copied from class: PamProcess

Called for each process to tell it to start (may not be necessary for processes which are listening for data anyway.

Specified by:

pamStart in class PamProcess

pamStop

public void pamStop()

Description copied from class: PamProcess

Stops the process.

Specified by:

pamStop in class PamProcess

getOutputData

public FFTDataBlock getOutputData()

getAnnotation

public Annotation getAnnotation(PamDataBlock pamDataBlock,
                                int annotation)

Description copied from interface: Annotator

Get an Annotation

Specified by:

getAnnotation in interface Annotator

Overrides:

getAnnotation in class PamProcess

Parameters:

pamDataBlock - Annotated datablock

annotation - annotation number

Returns:

Annotation

getNumAnnotations

public int getNumAnnotations(PamDataBlock pamDataBlock)

Specified by:

getNumAnnotations in interface Annotator

Overrides:

getNumAnnotations in class PamProcess

Parameters:

pamDataBlock - Annotated datablock

Returns:

the number of annotations

makeAnnotations

public void makeAnnotations()

getFftControl

public PamFFTControl getFftControl()