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2026-08-25 17:27:33 +00:00 · 2026-06-01 15:58:45 +03:00
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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
+
+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 _fmd_h
+#define _fmd_h
+#include "iir.h"
+#include "firmin.h"
+#include "wcpAGC.h"
+typedef struct _fmd
+{
+	int run;
+	int size;
+	double* in;
+	double* out;
+	double rate;
+	double f_low;						// audio low cutoff
+	double f_high;						// audio high cutoff
+	// 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
+	// for dc removal
+	double tau;
+	double mtau;
+	double onem_mtau;
+	double fmdc;
+	// pll audio gain
+	double deviation;
+	double again;
+	// for de-emphasis filter
+	double* audio;
+	FIRCORE pde;
+	int nc_de;
+	int mp_de;
+	// for audio filter
+	FIRCORE paud;
+	int nc_aud;
+	int mp_aud;
+	double afgain;
+	// CTCSS removal
+	SNOTCH sntch;
+	int sntch_run;
+	double ctcss_freq;
+	// detector limiter
+	WCPAGC plim;
+	int lim_run;
+	double lim_gain;
+	double lim_pre_gain;
+} fmd, *FMD;
+
+extern FMD create_fmd ( int run, int size, double* in, double* out, int rate, double deviation,
+	double f_low, double f_high, double fmin, double fmax, double zeta, double omegaN, double tau,
+	double afgain, int sntch_run, double ctcss_freq, int nc_de, int mp_de, int nc_aud, int mp_aud);
+
+extern void destroy_fmd (FMD a);
+
+extern void flush_fmd (FMD a);
+
+extern void xfmd (FMD a);
+
+extern void setBuffers_fmd (FMD a, double* in, double* out);
+
+extern void setSamplerate_fmd (FMD a, int rate);
+
+extern void setSize_fmd (FMD a, int size);
+
+// RXA Properties
+
+extern __declspec (dllexport) void SetRXAFMDeviation (int channel, double deviation);
+
+extern __declspec (dllexport) void SetRXAFMNCde (int channel, int nc);
+
+extern __declspec (dllexport) void SetRXAFMMPde (int channel, int mp);
+
+extern __declspec (dllexport) void SetRXAFMNCaud (int channel, int nc);
+
+extern __declspec (dllexport) void SetRXAFMMPaud (int channel, int mp);
+
+#endif