mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-11 02:46:12 -05:00
120 lines
3.3 KiB
C++
120 lines
3.3 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 <QRecursiveMutex>
|
|
|
|
#include "ammod.hpp"
|
|
#include "comm.hpp"
|
|
#include "TXA.hpp"
|
|
|
|
namespace WDSP {
|
|
|
|
AMMOD* AMMOD::create_ammod (int run, int mode, int size, double* in, double* out, double c_level)
|
|
{
|
|
AMMOD *a = new AMMOD;
|
|
a->run = run;
|
|
a->mode = mode;
|
|
a->size = size;
|
|
a->in = in;
|
|
a->out = out;
|
|
a->c_level = c_level;
|
|
a->a_level = 1.0 - a->c_level;
|
|
a->mult = 1.0 / sqrt (2.0);
|
|
return a;
|
|
}
|
|
|
|
void AMMOD::destroy_ammod(AMMOD *a)
|
|
{
|
|
delete a;
|
|
}
|
|
|
|
void AMMOD::flush_ammod(AMMOD *)
|
|
{
|
|
|
|
}
|
|
|
|
void AMMOD::xammod(AMMOD *a)
|
|
{
|
|
if (a->run)
|
|
{
|
|
int i;
|
|
switch (a->mode)
|
|
{
|
|
case 0: // AM
|
|
for (i = 0; i < a->size; i++)
|
|
a->out[2 * i + 0] = a->out[2 * i + 1] = a->mult * (a->c_level + a->a_level * a->in[2 * i + 0]);
|
|
break;
|
|
case 1: // DSB
|
|
for (i = 0; i < a->size; i++)
|
|
a->out[2 * i + 0] = a->out[2 * i + 1] = a->mult * a->in[2 * i + 0];
|
|
break;
|
|
case 2: // SSB w/Carrier
|
|
for (i = 0; i < a->size; i++)
|
|
{
|
|
a->out[2 * i + 0] = a->mult * a->c_level + a->a_level * a->in[2 * i + 0];
|
|
a->out[2 * i + 1] = a->mult * a->c_level + a->a_level * a->in[2 * i + 1];
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
else if (a->in != a->out)
|
|
memcpy (a->out, a->in, a->size * sizeof (dcomplex));
|
|
}
|
|
|
|
void AMMOD::setBuffers_ammod(AMMOD *a, double* in, double* out)
|
|
{
|
|
a->in = in;
|
|
a->out = out;
|
|
}
|
|
|
|
void AMMOD::setSamplerate_ammod(AMMOD *, int)
|
|
{
|
|
|
|
}
|
|
|
|
void AMMOD::setSize_ammod(AMMOD *a, int size)
|
|
{
|
|
a->size = size;
|
|
}
|
|
|
|
/********************************************************************************************************
|
|
* *
|
|
* TXA Properties *
|
|
* *
|
|
********************************************************************************************************/
|
|
|
|
void AMMOD::SetAMCarrierLevel (TXA& txa, double c_level)
|
|
{
|
|
txa.csDSP.lock();
|
|
txa.ammod.p->c_level = c_level;
|
|
txa.ammod.p->a_level = 1.0 - c_level;
|
|
txa.csDSP.unlock();
|
|
}
|
|
|
|
} // namespace WDSP
|