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Uladzimir Karpenka
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/* 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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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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* Time-Domain FIR *
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* *
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********************************************************************************************************/
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#ifndef _firmin_h
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#define _firmin_h
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typedef struct _firmin
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{
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int run; // run control
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int position; // position at which to execute
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int size; // input/output buffer size, power of two
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double* in; // input buffer
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double* out; // output buffer, can be same as input
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int nc; // number of filter coefficients, power of two
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double f_low; // low cutoff frequency
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double f_high; // high cutoff frequency
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double* ring; // internal complex ring buffer
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double* h; // complex filter coefficients
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int rsize; // ring size, number of complex samples, power of two
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int mask; // mask to update indexes
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int idx; // ring input/output index
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double samplerate; // sample rate
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int wintype; // filter window type
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double gain; // filter gain
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}firmin, *FIRMIN;
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extern FIRMIN create_firmin (int run, int position, int size, double* in, double* out,
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int nc, double f_low, double f_high, int samplerate, int wintype, double gain);
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extern void destroy_firmin (FIRMIN a);
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extern void flush_firmin (FIRMIN a);
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extern void xfirmin (FIRMIN a, int pos);
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extern void setBuffers_firmin (FIRMIN a, double* in, double* out);
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extern void setSamplerate_firmin (FIRMIN a, int rate);
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extern void setSize_firmin (FIRMIN a, int size);
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extern void setFreqs_firmin (FIRMIN a, double f_low, double f_high);
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#endif
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/********************************************************************************************************
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* *
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* Standalone Partitioned Overlap-Save Bandpass *
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* *
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********************************************************************************************************/
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#ifndef _firopt_h
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#define _firopt_h
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typedef struct _firopt
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{
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int run; // run control
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int position; // position at which to execute
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int size; // input/output buffer size, power of two
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double* in; // input buffer
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double* 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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double f_low; // low cutoff frequency
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double f_high; // high cutoff frequency
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double samplerate; // sample rate
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int wintype; // filter window type
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double gain; // filter gain
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int nfor; // number of buffers in delay line
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double* fftin; // fft input buffer
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double** fmask; // frequency domain masks
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double** fftout; // fftout delay line
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double* 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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double* maskgen; // input for mask generation FFT
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fftw_plan* pcfor; // array of forward FFT plans
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fftw_plan crev; // reverse fft plan
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fftw_plan* maskplan; // plans for frequency domain masks
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} firopt, *FIROPT;
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extern FIROPT create_firopt (int run, int position, int size, double* in, double* out,
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int nc, double f_low, double f_high, int samplerate, int wintype, double gain);
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extern void xfiropt (FIROPT a, int pos);
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extern void destroy_firopt (FIROPT a);
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extern void flush_firopt (FIROPT a);
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extern void setBuffers_firopt (FIROPT a, double* in, double* out);
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extern void setSamplerate_firopt (FIROPT a, int rate);
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extern void setSize_firopt (FIROPT a, int size);
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extern void setFreqs_firopt (FIROPT a, double f_low, double f_high);
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#endif
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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 _fircore_h
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#define _fircore_h
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typedef struct _fircore
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{
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int size; // input/output buffer size, power of two
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double* in; // input buffer
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double* 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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double* impulse; // impulse response of filter
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double* imp;
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int nfor; // number of buffers in delay line
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double* fftin; // fft input buffer
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double*** fmask; // frequency domain masks
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double** fftout; // fftout delay line
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double* 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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double* maskgen; // input for mask generation FFT
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fftw_plan* pcfor; // array of forward FFT plans
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fftw_plan crev; // reverse fft plan
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fftw_plan** maskplan; // plans for frequency domain masks
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CRITICAL_SECTION update;
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int cset;
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int mp;
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int masks_ready;
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} fircore, *FIRCORE;
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extern FIRCORE create_fircore (int size, double* in, double* out,
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int nc, int mp, double* impulse);
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extern void xfircore (FIRCORE a);
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extern void destroy_fircore (FIRCORE a);
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extern void flush_fircore (FIRCORE a);
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extern void setBuffers_fircore (FIRCORE a, double* in, double* out);
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extern void setSize_fircore (FIRCORE a, int size);
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extern void setImpulse_fircore (FIRCORE a, double* impulse, int update);
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extern void setNc_fircore (FIRCORE a, int nc, double* impulse);
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extern void setMp_fircore (FIRCORE a, int mp);
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extern void setUpdate_fircore (FIRCORE a);
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#endif
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