kopia lustrzana https://github.com/f4exb/sdrangel
137 wiersze
3.4 KiB
C++
137 wiersze
3.4 KiB
C++
/* cblock.c
|
|
|
|
This file is part of a program that implements a Software-Defined Radio.
|
|
|
|
Copyright (C) 2013, 2016 Warren Pratt, NR0V
|
|
Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
|
The author can be reached by email at
|
|
|
|
warren@wpratt.com
|
|
|
|
*/
|
|
|
|
#include "comm.hpp"
|
|
#include "cblock.hpp"
|
|
#include "RXA.hpp"
|
|
|
|
namespace WDSP {
|
|
|
|
void CBL::calc_cbl (CBL *a)
|
|
{
|
|
a->prevIin = 0.0;
|
|
a->prevQin = 0.0;
|
|
a->prevIout = 0.0;
|
|
a->prevQout = 0.0;
|
|
a->mtau = exp(-1.0 / (a->sample_rate * a->tau));
|
|
}
|
|
|
|
CBL* CBL::create_cbl(
|
|
int run,
|
|
int buff_size,
|
|
float *in_buff,
|
|
float *out_buff,
|
|
int mode,
|
|
int sample_rate,
|
|
double tau
|
|
)
|
|
{
|
|
CBL *a = new CBL;
|
|
a->run = run;
|
|
a->buff_size = buff_size;
|
|
a->in_buff = in_buff;
|
|
a->out_buff = out_buff;
|
|
a->mode = mode;
|
|
a->sample_rate = (double) sample_rate;
|
|
a->tau = tau;
|
|
calc_cbl (a);
|
|
return a;
|
|
}
|
|
|
|
void CBL::destroy_cbl(CBL *a)
|
|
{
|
|
delete a;
|
|
}
|
|
|
|
void CBL::flush_cbl (CBL *a)
|
|
{
|
|
a->prevIin = 0.0;
|
|
a->prevQin = 0.0;
|
|
a->prevIout = 0.0;
|
|
a->prevQout = 0.0;
|
|
}
|
|
|
|
void CBL::xcbl (CBL *a)
|
|
{
|
|
if (a->run)
|
|
{
|
|
int i;
|
|
double tempI, tempQ;
|
|
|
|
for (i = 0; i < a->buff_size; i++)
|
|
{
|
|
tempI = a->in_buff[2 * i + 0];
|
|
tempQ = a->in_buff[2 * i + 1];
|
|
a->out_buff[2 * i + 0] = a->in_buff[2 * i + 0] - a->prevIin + a->mtau * a->prevIout;
|
|
a->out_buff[2 * i + 1] = a->in_buff[2 * i + 1] - a->prevQin + a->mtau * a->prevQout;
|
|
a->prevIin = tempI;
|
|
a->prevQin = tempQ;
|
|
|
|
if (fabs(a->prevIout = a->out_buff[2 * i + 0]) < 1.0e-20)
|
|
a->prevIout = 0.0;
|
|
|
|
if (fabs(a->prevQout = a->out_buff[2 * i + 1]) < 1.0e-20)
|
|
a->prevQout = 0.0;
|
|
}
|
|
}
|
|
else if (a->in_buff != a->out_buff)
|
|
{
|
|
std::copy(a->in_buff, a->in_buff + a->buff_size * 2, a->out_buff);
|
|
}
|
|
}
|
|
|
|
void CBL::setBuffers_cbl (CBL *a, float* in, float* out)
|
|
{
|
|
a->in_buff = in;
|
|
a->out_buff = out;
|
|
}
|
|
|
|
void CBL::setSamplerate_cbl (CBL *a, int rate)
|
|
{
|
|
a->sample_rate = rate;
|
|
calc_cbl (a);
|
|
}
|
|
|
|
void CBL::setSize_cbl (CBL *a, int size)
|
|
{
|
|
a->buff_size = size;
|
|
flush_cbl (a);
|
|
}
|
|
|
|
/********************************************************************************************************
|
|
* *
|
|
* RXA Properties *
|
|
* *
|
|
********************************************************************************************************/
|
|
|
|
void CBL::SetCBLRun(RXA& rxa, int setit)
|
|
{
|
|
rxa.cbl->run = setit;
|
|
}
|
|
|
|
} // namespace WDSP
|