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sdrangel/wdsp/firopt.hpp
2024-08-10 09:59:42 +02:00

105 lines
3.5 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
*/
/********************************************************************************************************
* *
* Standalone Partitioned Overlap-Save Bandpass *
* *
********************************************************************************************************/
#ifndef wdsp_firopt_h
#define wdsp_firopt_h
#include <vector>
#include "fftw3.h"
#include "export.h"
namespace WDSP {
class WDSP_API FIROPT
{
public:
int run; // run control
int position; // position at which to execute
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
float f_low; // low cutoff frequency
float f_high; // high cutoff frequency
float samplerate; // sample rate
int wintype; // filter window type
float gain; // filter gain
int nfor; // number of buffers in delay line
std::vector<float> fftin; // fft input buffer
std::vector<std::vector<float>> 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::vector<fftwf_plan> maskplan; // plans for frequency domain masks
FIROPT(
int run,
int position,
int size,
float* in,
float* out,
int nc,
float f_low,
float f_high,
int samplerate,
int wintype,
float gain
);
FIROPT(const FIROPT&) = delete;
FIROPT& operator=(const FIROPT& other) = delete;
~FIROPT();
void destroy();
void flush();
void execute(int pos);
void setBuffers(float* in, float* out);
void setSamplerate(int rate);
void setSize(int size);
void setFreqs(float f_low, float f_high);
private:
void plan();
void calc();
void deplan();
};
} // namespace WDSP
#endif