sdrangel/wdsp/amsq.hpp

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2024-06-16 09:31:13 +00:00
/* amsq.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 _amsq_h
#define _amsq_h
#include "export.h"
namespace WDSP {
class RXA;
class TXA;
class WDSP_API AMSQ
{
public:
int run; // 0 if squelch system is OFF; 1 if it's ON
int size; // size of input/output buffers
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float* in; // squelch input signal buffer
float* out; // squelch output signal buffer
float* trigger; // pointer to trigger data source
float* trigsig; // buffer containing trigger signal
double rate; // sample rate
double avtau; // time constant for averaging noise
double avm;
double onem_avm;
double avsig;
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int state; // state machine control
int count;
double tup;
double tdown;
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int ntup;
int ntdown;
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float* cup;
float* cdown;
double tail_thresh;
double unmute_thresh;
double min_tail;
double max_tail;
double muted_gain;
static AMSQ* create_amsq (
int run,
int size,
float* in,
float* out,
float* trigger,
int rate,
double avtau,
double tup,
double tdown,
double tail_thresh,
double unmute_thresh,
double min_tail,
double max_tail,
double muted_gain
);
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static void destroy_amsq (AMSQ *a);
static void flush_amsq (AMSQ *a);
static void xamsq (AMSQ *a);
static void xamsqcap (AMSQ *a);
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static void setBuffers_amsq (AMSQ *a, float* in, float* out, float* trigger);
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static void setSamplerate_amsq (AMSQ *a, int rate);
static void setSize_amsq (AMSQ *a, int size);
// RXA Properties
static void SetAMSQRun (RXA& rxa, int run);
static void SetAMSQThreshold (RXA& rxa, double threshold);
static void SetAMSQMaxTail (RXA& rxa, double tail);
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// TXA Properties
static void SetAMSQRun (TXA& txa, int run);
static void SetAMSQMutedGain (TXA& txa, double dBlevel);
static void SetAMSQThreshold (TXA& txa, double threshold);
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private:
static void compute_slews(AMSQ *a);
static void calc_amsq(AMSQ *a);
static void decalc_amsq (AMSQ *a);
};
} // namespace WDSP
#endif