mirror of
https://github.com/f4exb/sdrangel.git
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137 lines
3.4 KiB
C++
137 lines
3.4 KiB
C++
/* cblock.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, 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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#include "comm.hpp"
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#include "cblock.hpp"
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#include "RXA.hpp"
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namespace WDSP {
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void CBL::calc_cbl (CBL *a)
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{
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a->prevIin = 0.0;
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a->prevQin = 0.0;
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a->prevIout = 0.0;
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a->prevQout = 0.0;
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a->mtau = exp(-1.0 / (a->sample_rate * a->tau));
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}
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CBL* CBL::create_cbl(
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int run,
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int buff_size,
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float *in_buff,
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float *out_buff,
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int mode,
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int sample_rate,
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double tau
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)
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{
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CBL *a = new CBL;
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a->run = run;
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a->buff_size = buff_size;
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a->in_buff = in_buff;
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a->out_buff = out_buff;
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a->mode = mode;
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a->sample_rate = (double) sample_rate;
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a->tau = tau;
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calc_cbl (a);
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return a;
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}
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void CBL::destroy_cbl(CBL *a)
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{
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delete a;
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}
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void CBL::flush_cbl (CBL *a)
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{
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a->prevIin = 0.0;
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a->prevQin = 0.0;
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a->prevIout = 0.0;
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a->prevQout = 0.0;
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}
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void CBL::xcbl (CBL *a)
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{
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if (a->run)
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{
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int i;
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double tempI, tempQ;
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for (i = 0; i < a->buff_size; i++)
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{
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tempI = a->in_buff[2 * i + 0];
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tempQ = a->in_buff[2 * i + 1];
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a->out_buff[2 * i + 0] = a->in_buff[2 * i + 0] - a->prevIin + a->mtau * a->prevIout;
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a->out_buff[2 * i + 1] = a->in_buff[2 * i + 1] - a->prevQin + a->mtau * a->prevQout;
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a->prevIin = tempI;
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a->prevQin = tempQ;
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if (fabs(a->prevIout = a->out_buff[2 * i + 0]) < 1.0e-20)
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a->prevIout = 0.0;
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if (fabs(a->prevQout = a->out_buff[2 * i + 1]) < 1.0e-20)
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a->prevQout = 0.0;
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}
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}
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else if (a->in_buff != a->out_buff)
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{
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std::copy(a->in_buff, a->in_buff + a->buff_size * 2, a->out_buff);
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}
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}
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void CBL::setBuffers_cbl (CBL *a, float* in, float* out)
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{
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a->in_buff = in;
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a->out_buff = out;
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}
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void CBL::setSamplerate_cbl (CBL *a, int rate)
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{
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a->sample_rate = rate;
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calc_cbl (a);
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}
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void CBL::setSize_cbl (CBL *a, int size)
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{
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a->buff_size = size;
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flush_cbl (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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void CBL::SetCBLRun(RXA& rxa, int setit)
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{
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rxa.cbl->run = setit;
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}
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} // namespace WDSP
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