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TFFTRealComplex.h
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1// @(#)root/fft:$Id$
2// Author: Anna Kreshuk 07/4/2006
3
4/*************************************************************************
5 * Copyright (C) 1995-2006, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12#ifndef ROOT_TFFTRealComplex
13#define ROOT_TFFTRealComplex
14
15#include "TVirtualFFT.h"
16#include "TString.h"
17
18class TComplex;
19
21 protected:
22 void *fIn; //input array
23 void *fOut; //output array
24 void *fPlan; //fftw plan (the plan how to compute the transform)
25 Int_t fNdim; //number of dimensions
26 Int_t fTotalSize; //total size of the transform
27 Int_t *fN; //transform sizes in each dimension
28 TString fFlags; //transform flags
29
30 UInt_t MapFlag(Option_t *flag);
31
32 public:
34 TFFTRealComplex(Int_t n, Bool_t inPlace);
35 TFFTRealComplex(Int_t ndim, Int_t *n, Bool_t inPlace);
36 ~TFFTRealComplex() override;
37
38 void Init( Option_t *flags, Int_t /*sign*/,const Int_t* /*kind*/) override;
39
40 virtual Int_t GetSize() const {return fTotalSize;}
41 Int_t *GetN() const override {return fN;}
42 Int_t GetNdim() const override {return fNdim;}
43 Option_t *GetType() const override {return "R2C";}
44 Int_t GetSign() const override {return 1;}
45 Option_t *GetTransformFlag() const override {return fFlags;}
46 Bool_t IsInplace() const override {if (fOut) return kTRUE; else return kFALSE;};
47
48 void GetPoints(Double_t *data, Bool_t fromInput = kFALSE) const override;
49 Double_t GetPointReal(Int_t ipoint, Bool_t fromInput = kFALSE) const override;
50 Double_t GetPointReal(const Int_t *ipoint, Bool_t fromInput = kFALSE) const override;
51 void GetPointComplex(Int_t ipoint, Double_t &re, Double_t &im, Bool_t fromInput=kFALSE) const override;
52 void GetPointComplex(const Int_t *ipoint, Double_t &re, Double_t &im, Bool_t fromInput=kFALSE) const override;
53 Double_t *GetPointsReal(Bool_t fromInput=kFALSE) const override;
54 void GetPointsComplex(Double_t *re, Double_t *im, Bool_t fromInput = kFALSE) const override ;
55 void GetPointsComplex(Double_t *data, Bool_t fromInput = kFALSE) const override ;
56
57 void SetPoint(Int_t ipoint, Double_t re, Double_t im = 0) override;
58 void SetPoint(const Int_t *ipoint, Double_t re, Double_t im = 0) override;
59 void SetPoints(const Double_t *data) override;
60 void SetPointComplex(Int_t ipoint, TComplex &c) override;
61 void SetPointsComplex(const Double_t *re, const Double_t *im) override;
62 void Transform() override;
63
65};
66
67#endif
#define c(i)
Definition RSha256.hxx:101
bool Bool_t
Definition RtypesCore.h:63
int Int_t
Definition RtypesCore.h:45
constexpr Bool_t kFALSE
Definition RtypesCore.h:101
double Double_t
Definition RtypesCore.h:59
constexpr Bool_t kTRUE
Definition RtypesCore.h:100
const char Option_t
Definition RtypesCore.h:66
#define ClassDefOverride(name, id)
Definition Rtypes.h:341
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void data
One of the interface classes to the FFTW package, can be used directly or via the TVirtualFFT class.
UInt_t MapFlag(Option_t *flag)
allowed options: "ES" "M" "P" "EX"
void Init(Option_t *flags, Int_t, const Int_t *) override
Creates the fftw-plan.
virtual Int_t GetSize() const
Option_t * GetType() const override
void GetPointComplex(Int_t ipoint, Double_t &re, Double_t &im, Bool_t fromInput=kFALSE) const override
Returns the point #ipoint.
Int_t GetNdim() const override
void SetPoints(const Double_t *data) override
Set all input points.
Int_t GetSign() const override
Double_t * GetPointsReal(Bool_t fromInput=kFALSE) const override
Returns the input array// One of the interface classes to the FFTW package, can be used directly or v...
Double_t GetPointReal(Int_t ipoint, Bool_t fromInput=kFALSE) const override
Returns the real part of the point #ipoint from the output or the point #ipoint from the input.
Bool_t IsInplace() const override
void SetPointComplex(Int_t ipoint, TComplex &c) override
Sets the point #ipoint (only the real part of the argument is taken)
Int_t * GetN() const override
Option_t * GetTransformFlag() const override
void GetPointsComplex(Double_t *re, Double_t *im, Bool_t fromInput=kFALSE) const override
Fills the argument arrays with the real and imaginary parts of the computed transform.
void SetPointsComplex(const Double_t *re, const Double_t *im) override
Set all points. Only the real array is used.
void SetPoint(Int_t ipoint, Double_t re, Double_t im=0) override
Set the point #ipoint
void GetPoints(Double_t *data, Bool_t fromInput=kFALSE) const override
Fills the array data with the computed transform.
void Transform() override
Computes the transform, specified in Init() function.
~TFFTRealComplex() override
Destroys the data arrays and the plan.
Basic string class.
Definition TString.h:139
TVirtualFFT is an interface class for Fast Fourier Transforms.
Definition TVirtualFFT.h:88
const Int_t n
Definition legend1.C:16