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sdrangel/wdsp/fircore.hpp
2024-08-10 06:40:35 +02:00

99 lines
3.3 KiB
C++

/* firmin.h
This file is part of a program that implements a Software-Defined Radio.
Copyright (C) 2016 Warren Pratt, NR0V
Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel
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; either version 2
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 for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
The author can be reached by email at
warren@wpratt.com
*/
/********************************************************************************************************
* *
* Partitioned Overlap-Save Filter Kernel *
* *
********************************************************************************************************/
#ifndef wdsp_fircore_h
#define wdsp_fircore_h
#include <array>
#include <vector>
#include "fftw3.h"
#include "export.h"
namespace WDSP {
class WDSP_API FIRCORE
{
public:
int size; // input/output buffer size, power of two
float* in; // input buffer
float* out; // output buffer, can be same as input
int nc; // number of filter coefficients, power of two, >= size
std::vector<float> impulse; // impulse response of filter
std::vector<float> imp;
int nfor; // number of buffers in delay line
std::vector<float> fftin; // fft input buffer
std::array<std::vector<std::vector<float>>, 2> fmask; // frequency domain masks
std::vector<std::vector<float>> fftout; // fftout delay line
std::vector<float> accum; // frequency domain accumulator
int buffidx; // fft out buffer index
int idxmask; // mask for index computations
std::vector<float> maskgen; // input for mask generation FFT
std::vector<fftwf_plan> pcfor; // array of forward FFT plans
fftwf_plan crev; // reverse fft plan
std::array<std::vector<fftwf_plan>, 2> maskplan; // plans for frequency domain masks
int cset;
int mp;
int masks_ready;
FIRCORE(
int size,
float* in,
float* out,
int nc,
int mp,
const float* impulse
);
FIRCORE(const FIRCORE&) = delete;
FIRCORE& operator=(const FIRCORE& other) = delete;
~FIRCORE();
void flush();
void execute();
void setBuffers(float* in, float* out);
void setSize(int size);
void setImpulse(const float* impulse, int update);
void setNc(int nc, const float* impulse);
void setMp(int mp);
void setUpdate();
private:
void plan();
void calc(int flip);
void deplan();
};
} // namespace WDSP
#endif