com.jsyn.unitgen

Class SpectralFFT

java.lang.Object

com.jsyn.unitgen.UnitGenerator

com.jsyn.unitgen.SpectralFFT

public class SpectralFFT
extends UnitGenerator

Periodically transform the input signal using an FFT. Output complete spectra.

Version:

016

Author:

Phil Burk (C) 2013 Mobileer Inc

See Also:

SpectralIFFT, Spectrum, SpectralFilter

Field Summary

Fields

Modifier and Type	Field and Description
UnitInputPort	input
UnitSpectralOutputPort	output Provides complete complex spectra when the FFT completes.

Fields inherited from class com.jsyn.unitgen.UnitGenerator

FALSE, PORT_NAME_AMPLITUDE, PORT_NAME_CUTOFF, PORT_NAME_FREQUENCY, PORT_NAME_FREQUENCY_SCALER, PORT_NAME_INPUT, PORT_NAME_OUTPUT, PORT_NAME_PAN, PORT_NAME_PHASE, PORT_NAME_PRESSURE, PORT_NAME_TIMBRE, PORT_NAME_TIME, synthesisEngine, TRUE, VERY_SMALL_FLOAT

Constructor Summary

Constructors

Constructor and Description
SpectralFFT()
SpectralFFT(int sizeLog2)

Method Summary

Modifier and Type	Method and Description
void	generate(int start, int limit) Perform essential synthesis function.
int	getOffset()
int	getSizeLog2()
SpectralWindow	getWindow()
void	setOffset(int offset) The FFT will be performed on a frame that is a multiple of the size plus this offset.
void	setSizeLog2(int sizeLog2) Please do not change the size of the FFT while JSyn is running.
void	setWindow(SpectralWindow window) Multiply input data by this window before doing the FFT.

Methods inherited from class com.jsyn.unitgen.UnitGenerator

addPort, addPort, autoStop, convertHalfLifeToMultiplier, convertTimeToRate, flattenOutputs, generate, getCircuit, getFramePeriod, getFrameRate, getId, getPortByName, getPorts, getSynthesisEngine, getSynthesizer, getTopUnit, getUnitGenerator, incrementWrapPhase, isEnabled, isStartRequired, printConnections, printConnections, printConnections, pullData, setCircuit, setEnabled, setFrameRate, setPort, setSynthesisEngine, start, start, start, stop, stop, stop

Methods inherited from class java.lang.Object

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

Field Detail

input

public UnitInputPort input

output

public UnitSpectralOutputPort output

Provides complete complex spectra when the FFT completes.

Constructor Detail

SpectralFFT

public SpectralFFT()

SpectralFFT

public SpectralFFT(int sizeLog2)

Parameters:

sizeLog2 - for example, pass 10 to get a 1024 bin FFT

Method Detail

setSizeLog2

public void setSizeLog2(int sizeLog2)

Please do not change the size of the FFT while JSyn is running.

Parameters:

sizeLog2 - for example, pass 9 to get a 512 bin FFT

getSizeLog2

public int getSizeLog2()

generate

public void generate(int start,
                     int limit)

Description copied from class: UnitGenerator

Perform essential synthesis function.

Specified by:

generate in class UnitGenerator

Parameters:

start - offset into port buffers

limit - limit offset into port buffers for loop

getWindow

public SpectralWindow getWindow()

setWindow

public void setWindow(SpectralWindow window)

Multiply input data by this window before doing the FFT. The default is a RectangularWindow.

setOffset

public void setOffset(int offset)

The FFT will be performed on a frame that is a multiple of the size plus this offset.

Parameters:

offset -

getOffset

public int getOffset()