/*
-----------------------------------------------------------------------
Copyright: 2010-2018, imec Vision Lab, University of Antwerp
           2014-2018, CWI, Amsterdam

Contact: astra@astra-toolbox.com
Website: http://www.astra-toolbox.com/

This file is part of the ASTRA Toolbox.


The ASTRA Toolbox is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

The ASTRA Toolbox is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.

-----------------------------------------------------------------------
*/

#ifndef FFT_H
#define FFT_H

#include <cufft.h>
#include <cuda.h>

#include "fbp_filters.h"

namespace astraCUDA {

bool allocateComplexOnDevice(int _iProjectionCount,
                             int _iDetectorCount,
                             cufftComplex ** _ppDevComplex);

bool freeComplexOnDevice(cufftComplex * _pDevComplex);

bool uploadComplexArrayToDevice(int _iProjectionCount, int _iDetectorCount,
                                cufftComplex * _pHostComplexSource,
                                cufftComplex * _pDevComplexTarget);

bool runCudaFFT(int _iProjectionCount, const float * _pfDevRealSource,
                int _iSourcePitch, int _iProjDets,
                int _iFFTRealDetectorCount, int _iFFTFourierDetectorCount,
                cufftComplex * _pDevTargetComplex);

bool runCudaIFFT(int _iProjectionCount, const cufftComplex* _pDevSourceComplex,
                 float * _pfRealTarget,
                 int _iTargetPitch, int _iProjDets,
                 int _iFFTRealDetectorCount, int _iFFTFourierDetectorCount);

void applyFilter(int _iProjectionCount, int _iFreqBinCount,
                 cufftComplex * _pSinogram, cufftComplex * _pFilter);

int calcFFTFourierSize(int _iFFTRealSize);

void genFilter(astra::E_FBPFILTER _eFilter, float _fD, int _iProjectionCount,
               cufftComplex * _pFilter, int _iFFTRealDetectorCount,
               int _iFFTFourierDetectorCount, float _fParameter = -1.0f);

void genIdenFilter(int _iProjectionCount, cufftComplex * _pFilter,
                   int _iFFTRealDetectorCount, int _iFFTFourierDetectorCount);

}

#endif /* FFT_H */