///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2023 Edouard Griffiths, F4EXB.                                  //
//                                                                               //
// This is the code from ft8mon: https://github.com/rtmrtmrtmrtm/ft8mon          //
// written by Robert Morris, AB1HL                                               //
// reformatted and adapted to Qt and SDRangel context                            //
//                                                                               //
// This program 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 as version 3 of the License, or                  //
// (at your option) any later version.                                           //
//                                                                               //
// This program 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 V3 for more details.                               //
//                                                                               //
// You should have received a copy of the GNU General Public License             //
// along with this program. If not, see <http://www.gnu.org/licenses/>.          //
///////////////////////////////////////////////////////////////////////////////////

#ifndef FFTPLAN_H
#define FFTPLAN_H

#include <fftw3.h>

namespace FT8
{

    // a cached fftw plan, for both of:
    // fftwf_plan_dft_r2c_1d(n, m_in, m_out, FFTW_ESTIMATE);
    // fftwf_plan_dft_c2r_1d(n, m_in, m_out, FFTW_ESTIMATE);
    class Plan
    {
    public:
        int n_;
        int type_;

        //
        // real -> complex
        //
        fftwf_complex *c_; // (n_ / 2) + 1 of these
        float *r_;         // n_ of these
        fftwf_plan fwd_;   // forward plan
        fftwf_plan rev_;   // reverse plan

        //
        // complex -> complex
        //
        fftwf_complex *cc1_; // n
        fftwf_complex *cc2_; // n
        fftwf_plan cfwd_;    // forward plan
        fftwf_plan crev_;    // reverse plan

        static const int M_FFTW_TYPE = FFTW_ESTIMATE;
    }; // Plan

    // MEASURE=0, ESTIMATE=64, PATIENT=32

} // namespace FT8

#endif // FFTPLAN_H