org.shared.fft

Class JavaFftService

java.lang.Object

org.shared.fft.JavaFftService

All Implemented Interfaces:

FftService, Service

public class JavaFftService
extends Object
implements FftService

An FftService implementation in pure Java.

Constructor Summary

Constructors

Constructor and Description
JavaFftService() Default constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	fft(int[] dims, double[] in, double[] out) Computes a forward transform.
ComplexArray	fullToReduced(ComplexArray full) Derives a reduced, half-complex ComplexArray from a full ComplexArray.
String	getHint(String name) Gets the value of the given hint.
void	ifft(int[] dims, double[] in, double[] out) Computes a backward transform.
ComplexArray	reducedToFull(ComplexArray reduced, int[] logicalDims) Derives a full ComplexArray from a reduced, half-complex ComplexArray.
void	rfft(int[] dims, double[] in, double[] out) Computes a reduced forward transform.
void	rifft(int[] dims, double[] in, double[] out) Computes a reduced backward transform.
void	setHint(String name, String value) Sets the value of the given hint.

Methods inherited from class java.lang.Object

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

Constructor Detail

JavaFftService

public JavaFftService()

Default constructor.

Method Detail

rfft

public void rfft(int[] dims,
        double[] in,
        double[] out)

Description copied from interface: FftService

Computes a reduced forward transform.

Specified by:

rfft in interface FftService

Parameters:

dims - the dimensions of the transform.

in - the input array.

out - the output array.

rifft

public void rifft(int[] dims,
         double[] in,
         double[] out)

Description copied from interface: FftService

Computes a reduced backward transform.

Specified by:

rifft in interface FftService

Parameters:

dims - the dimensions of the transform.

in - the input array.

out - the output array.

fft

public void fft(int[] dims,
       double[] in,
       double[] out)

Description copied from interface: FftService

Computes a forward transform.

Specified by:

fft in interface FftService

Parameters:

dims - the dimensions of the transform.

in - the input array.

out - the output array.

ifft

public void ifft(int[] dims,
        double[] in,
        double[] out)

Description copied from interface: FftService

Computes a backward transform.

Specified by:

ifft in interface FftService

Parameters:

dims - the dimensions of the transform.

in - the input array.

out - the output array.

setHint

public void setHint(String name,
           String value)

Description copied from interface: FftService

Sets the value of the given hint.

Specified by:

setHint in interface FftService

Parameters:

name - the hint name.

value - the value.

getHint

public String getHint(String name)

Description copied from interface: FftService

Gets the value of the given hint.

Specified by:

getHint in interface FftService

Parameters:

name - the hint name.

Returns:

the hint value.

reducedToFull

public ComplexArray reducedToFull(ComplexArray reduced,
                         int[] logicalDims)

Derives a full ComplexArray from a reduced, half-complex ComplexArray.

Parameters:

reduced - the reduced array.

logicalDims - the logical RealArray dimensions.

Returns:

the full array.

fullToReduced

public ComplexArray fullToReduced(ComplexArray full)

Derives a reduced, half-complex ComplexArray from a full ComplexArray.

Parameters:

full - the full array.

Returns:

the reduced array.