mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-13 20:01:46 -05:00
120 lines
3.4 KiB
C++
120 lines
3.4 KiB
C++
/* compress.c
|
|
|
|
This file is part of a program that implements a Software-Defined Radio.
|
|
|
|
Copyright (C) 2011, 2013, 2017 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
|
|
|
|
This software is based upon the algorithm described by Peter Martinez, G3PLX,
|
|
in the January 2010 issue of RadCom magazine.
|
|
|
|
*/
|
|
|
|
#include "comm.hpp"
|
|
#include "compress.hpp"
|
|
#include "TXA.hpp"
|
|
|
|
namespace WDSP {
|
|
|
|
COMPRESSOR* create_compressor (
|
|
int run,
|
|
int buffsize,
|
|
double* inbuff,
|
|
double* outbuff,
|
|
double gain )
|
|
{
|
|
COMPRESSOR *a = new COMPRESSOR;
|
|
a->run = run;
|
|
a->inbuff = inbuff;
|
|
a->outbuff = outbuff;
|
|
a->buffsize = buffsize;
|
|
a->gain = gain;
|
|
return a;
|
|
}
|
|
|
|
void COMPRESSOR::destroy_compressor (COMPRESSOR *a)
|
|
{
|
|
delete (a);
|
|
}
|
|
|
|
void COMPRESSOR::flush_compressor (COMPRESSOR *)
|
|
{
|
|
}
|
|
|
|
void COMPRESSOR::xcompressor (COMPRESSOR *a)
|
|
{
|
|
int i;
|
|
double mag;
|
|
if (a->run)
|
|
for (i = 0; i < a->buffsize; i++)
|
|
{
|
|
mag = sqrt(a->inbuff[2 * i + 0] * a->inbuff[2 * i + 0] + a->inbuff[2 * i + 1] * a->inbuff[2 * i + 1]);
|
|
if (a->gain * mag > 1.0)
|
|
a->outbuff[2 * i + 0] = a->inbuff[2 * i + 0] / mag;
|
|
else
|
|
a->outbuff[2 * i + 0] = a->inbuff[2 * i + 0] * a->gain;
|
|
a->outbuff[2 * i + 1] = 0.0;
|
|
}
|
|
else if (a->inbuff != a->outbuff)
|
|
memcpy(a->outbuff, a->inbuff, a->buffsize * sizeof (dcomplex));
|
|
}
|
|
|
|
void COMPRESSOR::setBuffers_compressor (COMPRESSOR *a, double* in, double* out)
|
|
{
|
|
a->inbuff = in;
|
|
a->outbuff = out;
|
|
}
|
|
|
|
void COMPRESSOR::setSamplerate_compressor (COMPRESSOR *, int)
|
|
{
|
|
}
|
|
|
|
void COMPRESSOR::setSize_compressor (COMPRESSOR *a, int size)
|
|
{
|
|
a->buffsize = size;
|
|
}
|
|
|
|
/********************************************************************************************************
|
|
* *
|
|
* TXA Properties *
|
|
* *
|
|
********************************************************************************************************/
|
|
|
|
void COMPRESSOR::SetCompressorRun (TXA& txa, int run)
|
|
{
|
|
if (txa.compressor.p->run != run)
|
|
{
|
|
txa.csDSP.lock();
|
|
txa.compressor.p->run = run;
|
|
TXA::SetupBPFilters (txa);
|
|
txa.csDSP.unlock();
|
|
}
|
|
}
|
|
|
|
void COMPRESSOR::SetCompressorGain (TXA& txa, double gain)
|
|
{
|
|
txa.csDSP.lock();
|
|
txa.compressor.p->gain = pow (10.0, gain / 20.0);
|
|
txa.csDSP.unlock();
|
|
}
|
|
|
|
} // namespace WDSP
|