88 lines
3.1 KiB
C++
88 lines
3.1 KiB
C++
/***************************************************************************
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PFourier.h
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Author: Andreas Suter
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e-mail: andreas.suter@psi.ch
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$Id$
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***************************************************************************/
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/***************************************************************************
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* Copyright (C) 2008 by Andreas Suter *
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* andreas.suter@psi.c *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifndef _PFOURIER_H_
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#define _PFOURIER_H_
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#include "fftw3.h"
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#define F_APODIZATION_NONE 1
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#define F_APODIZATION_WEAK 2
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#define F_APODIZATION_MEDIUM 3
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#define F_APODIZATION_STRONG 4
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// gamma_muon / (2 pi) = 1.355342e-2 (MHz/G)
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#define F_GAMMA_BAR_MUON 1.355342e-2
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class PFourier
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{
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public:
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PFourier(TH1F *data, Int_t unitTag,
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Double_t startTime = 0.0, Double_t endTime = 0.0,
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UInt_t zeroPaddingPower = 0);
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virtual ~PFourier();
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virtual void Transform(UInt_t apodizationTag = 0);
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virtual Double_t GetResolution() { return fResolution; }
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virtual TH1F* GetRealFourier(const Double_t scale = 1.0);
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virtual TH1F* GetImaginaryFourier(const Double_t scale = 1.0);
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virtual TH1F* GetPowerFourier(const Double_t scale = 1.0);
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virtual TH1F* GetPhaseFourier(const Double_t scale = 1.0);
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virtual Bool_t IsValid() { return fValid; }
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private:
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TH1F *fData;
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Bool_t fValid;
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Int_t fUnitTag; ///< 1=Field Units (G), 2=Frequency Units (MHz), 3=Angular Frequency Units (Mc/s)
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Int_t fApodization; ///< 0=none, 1=weak, 2=medium, 3=strong
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Double_t fTimeResolution;
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Double_t fStartTime;
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Double_t fEndTime;
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UInt_t fZeroPaddingPower;
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Double_t fResolution;
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UInt_t fNoOfData;
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UInt_t fNoOfBins;
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fftw_plan fFFTwPlan;
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fftw_complex *fIn;
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fftw_complex *fOut;
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virtual void PrepareFFTwInputData(UInt_t apodizationTag);
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virtual void ApodizeData(Int_t apodizationTag);
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};
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#endif // _PFOURIER_H_
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