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91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
/* amsq.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 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 _amsq_h
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#define _amsq_h
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#include "export.h"
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namespace WDSP {
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class RXA;
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class TXA;
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class WDSP_API AMSQ
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{
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public:
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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* in; // squelch input signal buffer
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float* out; // squelch output signal buffer
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float* trigger; // pointer to trigger data source
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float* trigsig; // buffer containing trigger signal
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float rate; // sample rate
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float avtau; // time constant for averaging noise
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float avm;
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float onem_avm;
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float avsig;
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int state; // state machine control
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int count;
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float tup;
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float tdown;
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int ntup;
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int ntdown;
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float* cup;
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float* cdown;
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float tail_thresh;
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float unmute_thresh;
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float min_tail;
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float max_tail;
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float muted_gain;
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static AMSQ* create_amsq (int run, int size, float* in, float* out, float* trigger, int rate, float avtau, float tup, float tdown, float tail_thresh, float unmute_thresh, float min_tail, float max_tail, float muted_gain);
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static void destroy_amsq (AMSQ *a);
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static void flush_amsq (AMSQ *a);
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static void xamsq (AMSQ *a);
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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);
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static void setSize_amsq (AMSQ *a, int size);
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// RXA Properties
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static void SetAMSQRun (RXA& rxa, int run);
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static void SetAMSQThreshold (RXA& rxa, float threshold);
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static void SetAMSQMaxTail (RXA& rxa, float tail);
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// TXA Properties
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static void SetAMSQRun (TXA& txa, int run);
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static void SetAMSQMutedGain (TXA& txa, float dBlevel);
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static void SetAMSQThreshold (TXA& txa, float threshold);
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private:
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static void compute_slews(AMSQ *a);
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static void calc_amsq(AMSQ *a);
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static void decalc_amsq (AMSQ *a);
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};
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} // namespace WDSP
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#endif
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