#include <FFT2D.h>

Public Member Functions
	FFT2D (casacore::Bool useFFTW=true)

	~FFT2D ()

FFT2D &	operator= (const FFT2D &other)

void	r2cFFT (casacore::Complex &out, casacore::Float &in, casacore::Long x, casacore::Long y)
	out has to be a pointer to an array [(x/2+1), y] shape More...

void	r2cFFT (casacore::Lattice< casacore::Complex > &out, casacore::Lattice< casacore::Float > &in)
	Real to complex FFT2D ..each plane of out will contain FFT in X/2+1, Y... More...

void	c2cFFT (casacore::Complex *&out, casacore::Long x, casacore::Long y, casacore::Bool toFreq=true)
	In place 2D FFT; out has to be of shape x,y More...

void	c2cFFT (casacore::DComplex *&out, casacore::Long x, casacore::Long y, casacore::Bool toFreq=true)

void	c2cFFT (casacore::Lattice< casacore::Complex > &inout, casacore::Bool toFreq=true)
	This will return the 2D FFT of each x-y planes back into the lattice. More...

void	c2cFFT (casacore::Lattice< casacore::DComplex > &inout, casacore::Bool toFreq=true)

void	c2cFFTInDouble (casacore::Lattice< casacore::Complex > &inout, casacore::Bool toFreq=true)
	Same as above EXCEPT will do the FFT in DComplex but input and output are Complex. More...

void	fftShift (casacore::Complex *&scr, casacore::Long x, casacore::Long y, casacore::Bool toFreq=false)
	The toFreq=false in FFTShift does the normalization of 1/N_sample expected of ifft. More...

void	fftShift (casacore::DComplex *&scr, casacore::Long x, casacore::Long y, casacore::Bool toFreq=false)

void	fftShift (casacore::Float *&scr, casacore::Long x, casacore::Long y)

void	doFFT (casacore::Complex *&out, casacore::Long x, casacore::Long y, casacore::Bool toFreq)

void	doFFT (casacore::DComplex *&out, casacore::Long x, casacore::Long y, casacore::Bool toFreq)

void	doFFT (casacore::Complex &out, casacore::Float &in, casacore::Long x, casacore::Long y)

Static Public Member Functions
static void	complexConvert (casacore::DComplex &srcD, casacore::Complex &scr, const ooLong len, const casacore::Bool down=false)
	C style element conversion avoiding overhead of iterators etc... More...

Private Types
typedef unsigned long long	ooLong
	This is a not a full generic fft class...use casacore::FFTServer or casacore::LatticeFFT for that. More...

Private Attributes
fftwf_plan	planC2C_forw_p
	casacore::FFTW stuff More...

fftwf_plan	planC2C_back_p

fftwf_plan	planR2C_p

fftw_plan	planC2CD_forw_p

fftw_plan	planC2CD_back_p

casacore::Bool	useFFTW_p

std::vector< casacore::Float >	wsave_p
	casacore::FFTPack stuff More...

casacore::Int	lsav_p

casacore::Long	nx_p
	casacore::FFTW fft1_p; More...

casacore::Long	ny_p

Detailed Description

Definition at line 34 of file FFT2D.h.

Member Typedef Documentation

typedef unsigned long long casa::FFT2D::ooLong

private

This is a not a full generic fft class...use casacore::FFTServer or casacore::LatticeFFT for that.

This is optimized with minimal memcopies for 2D FFTs Assumes 2D x, y array to be even numbers (e.g (100, 200)...will not work for (101, 200)) IMPORTANT: do not use the same FFT2D object for different sizes of x,y. Create another one if necessary as the plan or butterfly in fftpack, for x,y shape is kept and reused so may give wrong result if the FFT2D is used for x',y' shape !!

Definition at line 43 of file FFT2D.h.

Constructor & Destructor Documentation

casa::FFT2D::FFT2D ( casacore::Bool useFFTW = true )

casa::FFT2D::~FFT2D ( )

Member Function Documentation

void casa::FFT2D::c2cFFT	(	casacore::Complex *&	out,
		casacore::Long	x,
		casacore::Long	y,
		casacore::Bool	toFreq = `true`
	)

In place 2D FFT; out has to be of shape x,y

void casa::FFT2D::c2cFFT	(	casacore::DComplex *&	out,
		casacore::Long	x,
		casacore::Long	y,
		casacore::Bool	toFreq = `true`
	)

void casa::FFT2D::c2cFFT	(	casacore::Lattice< casacore::Complex > &	inout,
		casacore::Bool	toFreq = `true`
	)

This will return the 2D FFT of each x-y planes back into the lattice.

void casa::FFT2D::c2cFFT	(	casacore::Lattice< casacore::DComplex > &	inout,
		casacore::Bool	toFreq = `true`
	)

void casa::FFT2D::c2cFFTInDouble	(	casacore::Lattice< casacore::Complex > &	inout,
		casacore::Bool	toFreq = `true`
	)

Same as above EXCEPT will do the FFT in DComplex but input and output are Complex.

static void casa::FFT2D::complexConvert	(	casacore::DComplex *&	srcD,
		casacore::Complex *&	scr,
		const ooLong	len,
		const casacore::Bool	down = `false`
	)

static

C style element conversion avoiding overhead of iterators etc...

void casa::FFT2D::doFFT	(	casacore::Complex *&	out,
		casacore::Long	x,
		casacore::Long	y,
		casacore::Bool	toFreq
	)

void casa::FFT2D::doFFT	(	casacore::DComplex *&	out,
		casacore::Long	x,
		casacore::Long	y,
		casacore::Bool	toFreq
	)

void casa::FFT2D::doFFT	(	casacore::Complex *&	out,
		casacore::Float *&	in,
		casacore::Long	x,
		casacore::Long	y
	)

void casa::FFT2D::fftShift	(	casacore::Complex *&	scr,
		casacore::Long	x,
		casacore::Long	y,
		casacore::Bool	toFreq = `false`
	)

The toFreq=false in FFTShift does the normalization of 1/N_sample expected of ifft.

void casa::FFT2D::fftShift	(	casacore::DComplex *&	scr,
		casacore::Long	x,
		casacore::Long	y,
		casacore::Bool	toFreq = `false`
	)

void casa::FFT2D::fftShift	(	casacore::Float *&	scr,
		casacore::Long	x,
		casacore::Long	y
	)

FFT2D& casa::FFT2D::operator= ( const FFT2D & other )

void casa::FFT2D::r2cFFT	(	casacore::Complex *&	out,
		casacore::Float *&	in,
		casacore::Long	x,
		casacore::Long	y
	)

out has to be a pointer to an array [(x/2+1), y] shape

void casa::FFT2D::r2cFFT	(	casacore::Lattice< casacore::Complex > &	out,
		casacore::Lattice< casacore::Float > &	in
	)

Real to complex FFT2D ..each plane of out will contain FFT in X/2+1, Y...

the remainder of of the X part is untouched of out lattice is larger than X/2+1 on the x-axis

Member Data Documentation

casacore::Int casa::FFT2D::lsav_p

private

Definition at line 82 of file FFT2D.h.

casacore::Long casa::FFT2D::nx_p

private

casacore::FFTW fft1_p;

Definition at line 84 of file FFT2D.h.

casacore::Long casa::FFT2D::ny_p

private

Definition at line 84 of file FFT2D.h.

fftwf_plan casa::FFT2D::planC2C_back_p

private

Definition at line 75 of file FFT2D.h.

fftwf_plan casa::FFT2D::planC2C_forw_p

private

casacore::FFTW stuff

Definition at line 74 of file FFT2D.h.

fftw_plan casa::FFT2D::planC2CD_back_p

private

Definition at line 78 of file FFT2D.h.

fftw_plan casa::FFT2D::planC2CD_forw_p

private

Definition at line 77 of file FFT2D.h.

fftwf_plan casa::FFT2D::planR2C_p

private

Definition at line 76 of file FFT2D.h.

casacore::Bool casa::FFT2D::useFFTW_p

private

Definition at line 79 of file FFT2D.h.

std::vector<casacore::Float> casa::FFT2D::wsave_p

private

casacore::FFTPack stuff

Definition at line 81 of file FFT2D.h.

The documentation for this class was generated from the following file:

casa/code/synthesis/Utilities/FFT2D.h

Public Member Functions

Static Public Member Functions

Private Types

Private Attributes

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation