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87 lines
3.3 KiB
C++
87 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 "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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float* impulse; // impulse response of filter
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float* imp;
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int nfor; // number of buffers in delay line
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float* fftin; // fft input buffer
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float*** fmask; // frequency domain masks
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float** fftout; // fftout delay line
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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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float* maskgen; // input for mask generation FFT
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fftwf_plan* pcfor; // array of forward FFT plans
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fftwf_plan crev; // reverse fft plan
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fftwf_plan** 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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static FIRCORE* create_fircore (int size, float* in, float* out,
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int nc, int mp, float* impulse);
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static void xfircore (FIRCORE *a);
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static void destroy_fircore (FIRCORE *a);
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static void flush_fircore (FIRCORE *a);
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static void setBuffers_fircore (FIRCORE *a, float* in, float* out);
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static void setSize_fircore (FIRCORE *a, int size);
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static void setImpulse_fircore (FIRCORE *a, float* impulse, int update);
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static void setNc_fircore (FIRCORE *a, int nc, float* impulse);
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static void setMp_fircore (FIRCORE *a, int mp);
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static void setUpdate_fircore (FIRCORE *a);
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private:
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static void plan_fircore (FIRCORE *a);
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static void calc_fircore (FIRCORE *a, int flip);
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static void deplan_fircore (FIRCORE *a);
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};
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} // namespace WDSP
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#endif
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