/*	wfmd.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 _wfmd_h
#define _wfmd_h
#include "firmin.h"
#include "wcpAGC.h"
typedef struct _wfmd
{
	int run;
	int size;
	double* in;
	double* out;
	double rate;
	double f_low;						// audio low cutoff
	double f_high;						// audio high cutoff
	// quadrature discriminator
	double deviation;					// peak deviation, Hz
	double again;						// discriminator output gain
	double pre_i;						// previous sample, I
	double pre_q;						// previous sample, Q
	// for dc removal
	double tau;
	double mtau;
	double onem_mtau;
	double fmdc;
	// de-emphasis, single-pole RC
	int deemph_run;
	double tau_de;						// 75.0e-6 (Americas) or 50.0e-6 (elsewhere)
	double mde;
	double onem_mde;
	double deemph_z;
	// for audio filter
	double* audio;
	FIRCORE paud;
	int nc_aud;
	int mp_aud;
	double afgain;
	// detector limiter
	WCPAGC plim;
	int lim_run;
	double lim_gain;
	double lim_pre_gain;
} wfmd, *WFMD;

extern WFMD create_wfmd ( int run, int size, double* in, double* out, int rate, double deviation,
	double f_low, double f_high, double tau, int deemph_run, double tau_de, double afgain,
	int nc_aud, int mp_aud);

extern void destroy_wfmd (WFMD a);

extern void flush_wfmd (WFMD a);

extern void xwfmd (WFMD a);

extern void setBuffers_wfmd (WFMD a, double* in, double* out);

extern void setSamplerate_wfmd (WFMD a, int rate);

extern void setSize_wfmd (WFMD a, int size);

// RXA Properties

extern __declspec (dllexport) void SetRXAWFMDeviation (int channel, double deviation);

extern __declspec (dllexport) void SetRXAWFMNCaud (int channel, int nc);

extern __declspec (dllexport) void SetRXAWFMMPaud (int channel, int mp);

extern __declspec (dllexport) void SetRXAWFMAFFilter (int channel, double low, double high);

extern __declspec (dllexport) void SetRXAWFMDeemphRun (int channel, int run);

extern __declspec (dllexport) void SetRXAWFMDeemphTau (int channel, double tau);

extern __declspec (dllexport) void SetRXAWFMLimRun (int channel, int run);

extern __declspec (dllexport) void SetRXAWFMLimGain (int channel, double gaindB);

#endif