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110 lines
4.5 KiB
C++
110 lines
4.5 KiB
C++
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/* anb.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, 2014 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_anb_h
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#define wdsp_anb_h
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#include <QRecursiveMutex>
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namespace WDSP {
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class RXA;
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class ANB
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{
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public:
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int run;
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int buffsize; // size of input/output buffer
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float* in; // input buffer
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float* out; // output buffer
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int dline_size; // length of delay line which is 'double dline[length][2]'
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float *dline; // pointer to delay line
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double samplerate; // samplerate, used to convert times into sample counts
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double tau; // transition time, signal<->zero
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double hangtime; // time to stay at zero after noise is no longer detected
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double advtime; // deadtime (zero output) in advance of detected noise
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double backtau; // time constant used in averaging the magnitude of the input signal
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double threshold; // triggers if (noise > threshold * average_signal_magnitude)
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float *wave; // pointer to array holding transition waveform
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int state; // state of the state machine
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double avg; // average value of the signal magnitude
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int dtime; // count when decreasing the signal magnitude
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int htime; // count when hanging
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int itime; // count when increasing the signal magnitude
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int atime; // count at zero before the noise burst (advance count)
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double coef; // parameter in calculating transition waveform
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int trans_count; // number of samples to equal 'tau' time
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int hang_count; // number of samples to equal 'hangtime' time
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int adv_count; // number of samples to equal 'advtime' time
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int in_idx; // ring buffer position into which new samples are inserted
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int out_idx; // ring buffer position from which delayed samples are pulled
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double power; // level at which signal was increasing when a new decrease is started
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int count; // set each time a noise sample is detected, counts down
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double backmult; // multiplier for waveform averaging
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double ombackmult; // multiplier for waveform averaging
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QRecursiveMutex cs_update;
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float *legacy;
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static ANB* create_anb (
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int run,
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int buffsize,
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float* in,
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float* out,
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double samplerate,
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double tau,
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double hangtime,
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double advtime,
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double backtau,
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double threshold
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);
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static void destroy_anb (ANB *a);
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static void flush_anb (ANB *a);
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static void xanb (ANB *a);
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static void setBuffers_anb (ANB *a, float* in, float* out);
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static void setSamplerate_anb (ANB *a, int rate);
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static void setSize_anb (ANB *a, int size);
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// RXA
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static void SetRXAANBRun (RXA& rxa, int run);
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static void SetRXAANBBuffsize (RXA& rxa, int size);
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static void SetRXAANBSamplerate (RXA& rxa, int rate);
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static void SetRXAANBTau (RXA& rxa, double tau);
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static void SetRXAANBHangtime (RXA& rxa, double time);
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static void SetRXAANBAdvtime (RXA& rxa, double time);
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static void SetRXAANBBacktau (RXA& rxa, double tau);
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static void SetRXAANBThreshold (RXA& rxa, double thresh);
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private:
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static void initBlanker(ANB *a); //////////// legacy interface - remove
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};
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} // namespace
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#endif
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