kopia lustrzana https://github.com/f4exb/sdrangel
180 wiersze
4.7 KiB
C++
180 wiersze
4.7 KiB
C++
/* meter.c
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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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#include "comm.hpp"
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#include "meterlog10.hpp"
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#include "meter.hpp"
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#include "RXA.hpp"
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#include "TXA.hpp"
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namespace WDSP {
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void METER::calc_meter (METER *a)
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{
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a->mult_average = exp(-1.0 / (a->rate * a->tau_average));
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a->mult_peak = exp(-1.0 / (a->rate * a->tau_peak_decay));
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flush_meter(a);
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}
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METER* METER::create_meter (
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int run,
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int* prun,
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int size,
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float* buff,
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int rate,
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double tau_av,
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double tau_decay,
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double* result,
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int enum_av,
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int enum_pk,
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int enum_gain,
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double* pgain
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)
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{
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METER *a = new METER;
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a->run = run;
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a->prun = prun;
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a->size = size;
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a->buff = buff;
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a->rate = (double) rate;
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a->tau_average = tau_av;
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a->tau_peak_decay = tau_decay;
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a->result = result;
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a->enum_av = enum_av;
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a->enum_pk = enum_pk;
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a->enum_gain = enum_gain;
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a->pgain = pgain;
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calc_meter(a);
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return a;
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}
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void METER::destroy_meter (METER *a)
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{
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delete a;
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}
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void METER::flush_meter (METER *a)
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{
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a->avg = 0.0;
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a->peak = 0.0;
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a->result[a->enum_av] = -100.0;
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a->result[a->enum_pk] = -100.0;
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if ((a->pgain != 0) && (a->enum_gain >= 0))
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a->result[a->enum_gain] = 0.0;
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}
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void METER::xmeter (METER *a)
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{
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int srun;
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if (a->prun != 0)
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srun = *(a->prun);
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else
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srun = 1;
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if (a->run && srun)
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{
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int i;
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double smag;
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double np = 0.0;
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for (i = 0; i < a->size; i++)
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{
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double xr = a->buff[2 * i + 0];
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double xi = a->buff[2 * i + 1];
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smag = xr*xr + xi*xi;
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a->avg = a->avg * a->mult_average + (1.0 - a->mult_average) * smag;
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a->peak *= a->mult_peak;
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if (smag > np)
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np = smag;
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}
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if (np > a->peak)
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a->peak = np;
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a->result[a->enum_av] = 10.0 * MemLog::mlog10 (a->avg + 1.0e-40);
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a->result[a->enum_pk] = 10.0 * MemLog::mlog10 (a->peak + 1.0e-40);
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if ((a->pgain != 0) && (a->enum_gain >= 0))
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a->result[a->enum_gain] = 20.0 * MemLog::mlog10 (*a->pgain + 1.0e-40);
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}
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else
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{
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if (a->enum_av >= 0)
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a->result[a->enum_av] = -100.0;
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if (a->enum_pk >= 0)
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a->result[a->enum_pk] = -100.0;
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if (a->enum_gain >= 0)
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a->result[a->enum_gain] = 0.0;
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}
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}
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void METER::setBuffers_meter (METER *a, float* in)
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{
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a->buff = in;
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}
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void METER::setSamplerate_meter (METER *a, int rate)
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{
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a->rate = (double) rate;
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calc_meter(a);
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}
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void METER::setSize_meter (METER *a, int size)
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{
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a->size = size;
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flush_meter (a);
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}
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/********************************************************************************************************
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* *
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* RXA Properties *
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* *
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********************************************************************************************************/
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double METER::GetMeter (RXA& rxa, int mt)
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{
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double val = rxa.meter[mt];
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return val;
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}
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/********************************************************************************************************
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* *
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* TXA Properties *
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* *
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********************************************************************************************************/
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double METER::GetMeter (TXA& txa, int mt)
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{
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double val = txa.meter[mt];
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return val;
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}
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} // namespace WDSP
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