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https://github.com/f4exb/sdrangel.git
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138 lines
3.9 KiB
C++
138 lines
3.9 KiB
C++
/* fmd.h
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This file is part of a program that implements a Software-Defined Radio.
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Copyright (C) 2013 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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#ifndef wdsp_fmd_h
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#define wdsp_fmd_h
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#include "export.h"
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namespace WDSP {
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class FIRCORE;
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class SNOTCH;
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class WCPAGC;
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class RXA;
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class WDSP_API FMD
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{
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public:
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int run;
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int size;
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float* in;
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float* out;
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double rate;
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double f_low; // audio low cutoff
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double f_high; // audio high cutoff
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// pll
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double fmin; // pll - minimum carrier freq to lock
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double fmax; // pll - maximum carrier freq to lock
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double omega_min; // pll - minimum lock check parameter
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double omega_max; // pll - maximum lock check parameter
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double zeta; // pll - damping factor; as coded, must be <=1.0
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double omegaN; // pll - natural frequency
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double phs; // pll - phase accumulator
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double omega; // pll - locked pll frequency
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double fil_out; // pll - filter output
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double g1, g2; // pll - filter gain parameters
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double pllpole; // pll - pole frequency
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// for dc removal
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double tau;
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double mtau;
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double onem_mtau;
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double fmdc;
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// pll audio gain
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double deviation;
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double again;
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// for de-emphasis filter
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float* audio;
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FIRCORE *pde;
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int nc_de;
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int mp_de;
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// for audio filter
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FIRCORE *paud;
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int nc_aud;
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int mp_aud;
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double afgain;
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// CTCSS removal
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SNOTCH *sntch;
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int sntch_run;
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double ctcss_freq;
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// detector limiter
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WCPAGC *plim;
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int lim_run;
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double lim_gain;
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double lim_pre_gain;
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static FMD* create_fmd (
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int run,
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int size,
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float* in,
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float* out,
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int rate,
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double deviation,
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double f_low,
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double f_high,
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double fmin,
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double fmax,
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double zeta,
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double omegaN,
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double tau,
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double afgain,
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int sntch_run,
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double ctcss_freq,
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int nc_de,
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int mp_de,
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int nc_aud,
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int mp_aud
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);
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static void destroy_fmd (FMD *a);
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static void flush_fmd (FMD *a);
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static void xfmd (FMD *a);
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static void setBuffers_fmd (FMD *a, float* in, float* out);
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static void setSamplerate_fmd (FMD *a, int rate);
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static void setSize_fmd (FMD *a, int size);
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// RXA Properties
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static void SetFMDeviation (RXA& rxa, double deviation);
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static void SetCTCSSFreq (RXA& rxa, double freq);
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static void SetCTCSSRun (RXA& rxa, int run);
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static void SetFMNCde (RXA& rxa, int nc);
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static void SetFMMPde (RXA& rxa, int mp);
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static void SetFMNCaud (RXA& rxa, int nc);
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static void SetFMMPaud (RXA& rxa, int mp);
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static void SetFMLimRun (RXA& rxa, int run);
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static void SetFMLimGain (RXA& rxa, double gaindB);
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static void SetFMAFFilter(RXA& rxa, double low, double high);
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private:
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static void calc_fmd (FMD *a);
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static void decalc_fmd (FMD *a);
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};
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} // namespace WDSP
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#endif
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