sdrangel/wdsp/fmd.hpp

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