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98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
/* firmin.h
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This file is part of a program that implements a Software-Defined Radio.
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Copyright (C) 2016 Warren Pratt, NR0V
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Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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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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 Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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The author can be reached by email at
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warren@wpratt.com
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*/
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/********************************************************************************************************
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* *
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* Partitioned Overlap-Save Filter Kernel *
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* *
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********************************************************************************************************/
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#ifndef wdsp_fircore_h
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#define wdsp_fircore_h
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#include <array>
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#include <vector>
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#include "fftw3.h"
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#include "export.h"
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namespace WDSP {
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class WDSP_API FIRCORE
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{
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public:
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int size; // input/output buffer size, power of two
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float* in; // input buffer
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float* out; // output buffer, can be same as input
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int nc; // number of filter coefficients, power of two, >= size
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std::vector<float> impulse; // impulse response of filter
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std::vector<float> imp;
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int nfor; // number of buffers in delay line
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std::vector<float> fftin; // fft input buffer
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std::array<std::vector<std::vector<float>>, 2> fmask; // frequency domain masks
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std::vector<std::vector<float>> fftout; // fftout delay line
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std::vector<float> accum; // frequency domain accumulator
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int buffidx; // fft out buffer index
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int idxmask; // mask for index computations
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std::vector<float> maskgen; // input for mask generation FFT
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std::vector<fftwf_plan> pcfor; // array of forward FFT plans
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fftwf_plan crev; // reverse fft plan
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std::array<std::vector<fftwf_plan>, 2> maskplan; // plans for frequency domain masks
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int cset;
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int mp;
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int masks_ready;
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FIRCORE(
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int size,
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float* in,
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float* out,
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int mp,
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const std::vector<float>& impulse
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);
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FIRCORE(const FIRCORE&) = delete;
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FIRCORE& operator=(const FIRCORE& other) = delete;
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~FIRCORE();
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void flush();
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void execute();
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void setBuffers(float* in, float* out);
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void setSize(int size);
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void setImpulse(const std::vector<float>& impulse, int update);
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void setNc(const std::vector<float>& impulse);
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void setMp(int mp);
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void setUpdate();
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private:
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void plan();
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void calc(int flip);
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void deplan();
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};
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} // namespace WDSP
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#endif
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