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135 lines
3.5 KiB
C++
135 lines
3.5 KiB
C++
/* fmsq.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, 2016 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_fmsq_h
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#define wdsp_fmsq_h
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#include <array>
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#include <vector>
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#include "export.h"
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namespace WDSP {
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class FIRCORE;
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class WDSP_API FMSQ
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{
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public:
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enum class FMSQState
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{
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MUTED,
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INCREASE,
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UNMUTED,
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TAIL,
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DECREASE
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};
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int run; // 0 if squelch system is OFF; 1 if it's ON
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int size; // size of input/output buffers
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float* insig; // squelch input signal buffer
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float* outsig; // squelch output signal buffer
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float* trigger; // buffer used to trigger mute/unmute (may be same as input; matches timing of input buffer)
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double rate; // sample rate
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std::vector<float> noise;
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double fc; // corner frequency for sig / noise detection
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double* pllpole; // pointer to pole frequency of the fm demodulator pll
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std::array<float, 4> F;
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std::array<float, 4> G;
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double avtau; // time constant for averaging noise
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double avm;
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double onem_avm;
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double avnoise;
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double longtau; // time constant for long averaging
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double longavm;
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double onem_longavm;
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double longnoise;
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FMSQState state; // state machine control
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int count;
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double tup;
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double tdown;
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int ntup;
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int ntdown;
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std::vector<double> cup;
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std::vector<double> cdown;
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double tail_thresh;
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double unmute_thresh;
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double min_tail;
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double max_tail;
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int ready;
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double ramp;
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double rstep;
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double tdelay;
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int nc;
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int mp;
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FIRCORE *p;
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FMSQ(
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int _run,
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int _size,
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float* _insig,
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float* _outsig,
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float* _trigger,
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int _rate,
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double _fc,
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double* _pllpole,
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double _tdelay,
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double _avtau,
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double _longtau,
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double _tup,
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double _tdown,
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double _tail_thresh,
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double _unmute_thresh,
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double _min_tail,
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double _max_tail,
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int _nc,
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int _mp
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);
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FMSQ(const FMSQ&) = delete;
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FMSQ& operator=(const FMSQ& other) = delete;
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~FMSQ();
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void flush();
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void execute();
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void setBuffers(float* in, float* out, float* trig);
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void setSamplerate(int rate);
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void setSize(int size);
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// Public Properties
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void setRun(int run);
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void setThreshold(double threshold);
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void setNC(int nc);
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void setMP(int mp);
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private:
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void calc();
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void decalc();
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};
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} // namespace WDSP
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#endif
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