mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-25 01:18:38 -05:00
119 lines
3.0 KiB
C++
119 lines
3.0 KiB
C++
/* ammod.h
|
|
|
|
This file is part of a program that implements a Software-Defined Radio.
|
|
|
|
Copyright (C) 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
|
|
|
|
*/
|
|
|
|
#include <cmath>
|
|
|
|
#include "ammod.hpp"
|
|
#include "comm.hpp"
|
|
#include "TXA.hpp"
|
|
|
|
namespace WDSP {
|
|
|
|
AMMOD::AMMOD(
|
|
int _run,
|
|
int _mode,
|
|
int _size,
|
|
float* _in,
|
|
float* _out,
|
|
double _c_level
|
|
)
|
|
{
|
|
run = _run;
|
|
mode = _mode;
|
|
size = _size;
|
|
in = _in;
|
|
out = _out;
|
|
c_level = _c_level;
|
|
a_level = 1.0 - c_level;
|
|
mult = 1.0 / sqrt (2.0);
|
|
}
|
|
|
|
void AMMOD::flush()
|
|
{
|
|
// Nothing to flush
|
|
}
|
|
|
|
void AMMOD::execute()
|
|
{
|
|
if (run)
|
|
{
|
|
int i;
|
|
switch (mode)
|
|
{
|
|
case 0: // AM
|
|
for (i = 0; i < size; i++)
|
|
out[2 * i + 0] = out[2 * i + 1] = (float) (mult * (c_level + a_level * in[2 * i + 0]));
|
|
break;
|
|
case 1: // DSB
|
|
for (i = 0; i < size; i++)
|
|
out[2 * i + 0] = out[2 * i + 1] = (float) (mult * in[2 * i + 0]);
|
|
break;
|
|
case 2: // SSB w/Carrier
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
out[2 * i + 0] = (float) (mult * c_level + a_level * in[2 * i + 0]);
|
|
out[2 * i + 1] = (float) (mult * c_level + a_level * in[2 * i + 1]);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
else if (in != out)
|
|
std::copy( in, in + size * 2, out);
|
|
}
|
|
|
|
void AMMOD::setBuffers(float* _in, float* _out)
|
|
{
|
|
in = _in;
|
|
out = _out;
|
|
}
|
|
|
|
void AMMOD::setSamplerate(int)
|
|
{
|
|
// Nothing to do
|
|
}
|
|
|
|
void AMMOD::setSize(int _size)
|
|
{
|
|
size = _size;
|
|
}
|
|
|
|
/********************************************************************************************************
|
|
* *
|
|
* TXA Properties *
|
|
* *
|
|
********************************************************************************************************/
|
|
|
|
void AMMOD::setAMCarrierLevel(double _c_level)
|
|
{
|
|
c_level = _c_level;
|
|
a_level = 1.0 - _c_level;
|
|
}
|
|
|
|
} // namespace WDSP
|