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/*
-----------------------------------------------------------------------
Copyright: 2010-2018, iMinds-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 */
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