Package clipgenerator

Class ClipSpectrogram

java.lang.Object

clipgenerator.ClipSpectrogram

Direct Known Subclasses:

ClickSpectrogram

public class ClipSpectrogram
extends Object

Creates and stores a spectrogram image for a wave file snippet. Usually used with small snippets of wave data rather than continious raw data.

Author:

Jamie Macaulay

Field Summary

Fields

Modifier and Type	Field	Description
FastFFT	fastFFT	A fast fourier transform class.

Constructor Summary

Constructors

Constructor	Description
ClipSpectrogram(PamDataUnit clickDetection)

Method Summary

Modifier and Type	Method	Description
void	calcSpectrogram(double[][] waveData, int fftLength, int fftHop, int windowType)	Calculate the click spectrum for all channels.
int	getFFTHop()	Get the FFT hope in samples.
int	getFFTSize()	Get the FFT size in samples.
ArrayList<double[][]>	getSpectrogram()	Get the spectrogram
double[][]	getSpectrogram(int ichan)	Get the spectrogram for a given channel
int	getWindowType()	Get the last used window type.
ComplexArray	specTransform(double[] waveChunk)	Apply a transforms to the raw data to convert from time to frequency/phase domain.

Methods inherited from class java.lang.Object

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

Field Details

fastFFT

public FastFFT fastFFT

A fast fourier transform class.

Constructor Details

ClipSpectrogram

public ClipSpectrogram(PamDataUnit clickDetection)

Method Details

getSpectrogram

public ArrayList<double[][]> getSpectrogram()

Get the spectrogram

Returns:

the spectrogram for each channel

getSpectrogram

public double[][] getSpectrogram(int ichan)

Get the spectrogram for a given channel

Parameters:

iChan - - the relative channel number.

Returns:

the spectrogram for each channel

getFFTHop

public int getFFTHop()

Get the FFT hope in samples.

Returns:

the FFT hop.

getFFTSize

public int getFFTSize()

Get the FFT size in samples.

Returns:

the FFT size

calcSpectrogram

public void calcSpectrogram(double[][] waveData,
 int fftLength,
 int fftHop,
 int windowType)

Calculate the click spectrum for all channels.

Parameters:

waveData - - the raw data for each channel

specTransform

public ComplexArray specTransform(double[] waveChunk)

Apply a transforms to the raw data to convert from time to frequency/phase domain.

Parameters:

wavChunk - - the raw windowed chunk of data (i.e. after hanning window has been applied)

len - - the len of the transform e.g. FFT length

Returns:

the ComplexArray with transformed data.

getWindowType

public int getWindowType()

Get the last used window type.

Returns:

the window type @see WindowFunction.getWindowFunc(windowType, fftLength);