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fftw_engine.hh
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fftw_engine.hh
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/**
* file fftw_engine.hh
*
* @author Till Junge <till.junge@altermail.ch>
*
* @date 03 Dec 2017
*
* @brief FFT engine using FFTW
*
* @section LICENCE
*
* Copyright (C) 2017 Till Junge
*
* µSpectre 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, or (at
* your option) any later version.
*
* µSpectre 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 GNU Emacs; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <fftw3.h>
#include "fft/fft_engine_base.hh"
#ifndef FFTW_ENGINE_H
#define FFTW_ENGINE_H
namespace muSpectre {
template <Dim_t DimS, Dim_t DimM>
class FFTW_Engine: public FFT_Engine_base<DimS, DimM>
{
public:
using Parent = FFT_Engine_base<DimS, DimM>;
using Ccoord = typename Parent::Ccoord;
using Rcoord = typename Parent::Rcoord;
using Workspace_t = typename Parent::Workspace_t;
using Field_t = typename Parent::Field_t;
//! Default constructor
FFTW_Engine() = delete;
//! Constructor with system resolutions
FFTW_Engine(Ccoord resolutions, Rcoord lengths);
//! Copy constructor
FFTW_Engine(const FFTW_Engine &other) = delete;
//! Move constructor
FFTW_Engine(FFTW_Engine &&other) = default;
//! Destructor
virtual ~FFTW_Engine() noexcept;
//! Copy assignment operator
FFTW_Engine& operator=(const FFTW_Engine &other) = delete;
//! Move assignment operator
FFTW_Engine& operator=(FFTW_Engine &&other) = default;
// compute the plan, etc
virtual void initialise(FFT_PlanFlags plan_flags) override;
//! forward transform
virtual Workspace_t & fft(const Field_t & field) override;
//! inverse transform
virtual void ifft(Field_t & field) const override;
protected:
Ccoord hermitian_resolutions;
fftw_plan plan_fft{};
fftw_plan plan_ifft{};
private:
};
} // muSpectre
#endif /* FFTW_ENGINE_H */

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