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sdrangel/wdsp/bandpass.cpp

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/* bandpass.c
This file is part of a program that implements a Software-Defined Radio.
Copyright (C) 2013, 2016, 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 "comm.hpp"
#include "bandpass.hpp"
#include "fir.hpp"
#include "firmin.hpp"
#include "RXA.hpp"
#include "TXA.hpp"
namespace WDSP {
/********************************************************************************************************
* *
* Partitioned Overlap-Save Bandpass *
* *
********************************************************************************************************/
BANDPASS* BANDPASS::create_bandpass (int run, int position, int size, int nc, int mp, double* in, double* out,
double f_low, double f_high, int samplerate, int wintype, double gain)
{
// NOTE: 'nc' must be >= 'size'
BANDPASS *a = new BANDPASS;
double* impulse;
a->run = run;
a->position = position;
a->size = size;
a->nc = nc;
a->mp = mp;
a->in = in;
a->out = out;
a->f_low = f_low;
a->f_high = f_high;
a->samplerate = samplerate;
a->wintype = wintype;
a->gain = gain;
impulse = FIR::fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
a->p = FIRCORE::create_fircore (a->size, a->in, a->out, a->nc, a->mp, impulse);
delete[] impulse;
return a;
}
void BANDPASS::destroy_bandpass (BANDPASS *a)
{
FIRCORE::destroy_fircore (a->p);
delete a;
}
void BANDPASS::flush_bandpass (BANDPASS *a)
{
FIRCORE::flush_fircore (a->p);
}
void BANDPASS::xbandpass (BANDPASS *a, int pos)
{
if (a->run && a->position == pos)
FIRCORE::xfircore (a->p);
else if (a->out != a->in)
memcpy (a->out, a->in, a->size * sizeof (dcomplex));
}
void BANDPASS::setBuffers_bandpass (BANDPASS *a, double* in, double* out)
{
a->in = in;
a->out = out;
FIRCORE::setBuffers_fircore (a->p, a->in, a->out);
}
void BANDPASS::setSamplerate_bandpass (BANDPASS *a, int rate)
{
double* impulse;
a->samplerate = rate;
impulse = FIR::fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
FIRCORE::setImpulse_fircore (a->p, impulse, 1);
delete[] impulse;
}
void BANDPASS::setSize_bandpass (BANDPASS *a, int size)
{
// NOTE: 'size' must be <= 'nc'
double* impulse;
a->size = size;
FIRCORE::setSize_fircore (a->p, a->size);
// recalc impulse because scale factor is a function of size
impulse = FIR::fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
FIRCORE::setImpulse_fircore (a->p, impulse, 1);
delete[] (impulse);
}
void BANDPASS::setGain_bandpass (BANDPASS *a, double gain, int update)
{
double* impulse;
a->gain = gain;
impulse = FIR::fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
FIRCORE::setImpulse_fircore (a->p, impulse, update);
delete[] (impulse);
}
void BANDPASS::CalcBandpassFilter (BANDPASS *a, double f_low, double f_high, double gain)
{
double* impulse;
if ((a->f_low != f_low) || (a->f_high != f_high) || (a->gain != gain))
{
a->f_low = f_low;
a->f_high = f_high;
a->gain = gain;
impulse = FIR::fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
FIRCORE::setImpulse_fircore (a->p, impulse, 1);
delete[] (impulse);
}
}
/********************************************************************************************************
* *
* RXA Properties *
* *
********************************************************************************************************/
void BANDPASS::SetBandpassFreqs (RXA& rxa, double f_low, double f_high)
{
double* impulse;
BANDPASS *a = rxa.bp1.p;
if ((f_low != a->f_low) || (f_high != a->f_high))
{
impulse = FIR::fir_bandpass (a->nc, f_low, f_high, a->samplerate,
a->wintype, 1, a->gain / (double)(2 * a->size));
FIRCORE::setImpulse_fircore (a->p, impulse, 0);
delete[] (impulse);
rxa.csDSP.lock();
a->f_low = f_low;
a->f_high = f_high;
FIRCORE::setUpdate_fircore (a->p);
rxa.csDSP.unlock();
}
}
void BANDPASS::SetBandpassNC (RXA& rxa, int nc)
{
// NOTE: 'nc' must be >= 'size'
double* impulse;
BANDPASS *a;
rxa.csDSP.lock();
a = rxa.bp1.p;
if (nc != a->nc)
{
a->nc = nc;
impulse = FIR::fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
FIRCORE::setNc_fircore (a->p, a->nc, impulse);
delete[] (impulse);
}
rxa.csDSP.unlock();
}
void BANDPASS::SetBandpassMP (RXA& rxa, int mp)
{
BANDPASS *a;
a = rxa.bp1.p;
if (mp != a->mp)
{
a->mp = mp;
FIRCORE::setMp_fircore (a->p, a->mp);
}
}
/********************************************************************************************************
* *
* TXA Properties *
* *
********************************************************************************************************/
//PORT
//void SetTXABandpassFreqs (int channel, double f_low, double f_high)
//{
// double* impulse;
// BANDPASS a;
// a = txa.bp0.p;
// if ((f_low != a->f_low) || (f_high != a->f_high))
// {
// a->f_low = f_low;
// a->f_high = f_high;
// impulse = fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
// setImpulse_fircore (a->p, impulse, 1);
// delete[] (impulse);
// }
// a = txa.bp1.p;
// if ((f_low != a->f_low) || (f_high != a->f_high))
// {
// a->f_low = f_low;
// a->f_high = f_high;
// impulse = fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
// setImpulse_fircore (a->p, impulse, 1);
// delete[] (impulse);
// }
// a = txa.bp2.p;
// if ((f_low != a->f_low) || (f_high != a->f_high))
// {
// a->f_low = f_low;
// a->f_high = f_high;
// impulse = fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
// setImpulse_fircore (a->p, impulse, 1);
// delete[] (impulse);
// }
//}
void BANDPASS::SetBandpassNC (TXA& txa, int nc)
{
// NOTE: 'nc' must be >= 'size'
double* impulse;
BANDPASS *a;
txa.csDSP.lock();
a = txa.bp0.p;
if (a->nc != nc)
{
a->nc = nc;
impulse = FIR::fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
FIRCORE::setNc_fircore (a->p, a->nc, impulse);
delete[] (impulse);
}
a = txa.bp1.p;
if (a->nc != nc)
{
a->nc = nc;
impulse = FIR::fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
FIRCORE::setNc_fircore (a->p, a->nc, impulse);
delete[] (impulse);
}
a = txa.bp2.p;
if (a->nc != nc)
{
a->nc = nc;
impulse = FIR::fir_bandpass (a->nc, a->f_low, a->f_high, a->samplerate, a->wintype, 1, a->gain / (double)(2 * a->size));
FIRCORE::setNc_fircore (a->p, a->nc, impulse);
delete[] (impulse);
}
txa.csDSP.unlock();
}
void BANDPASS::SetBandpassMP (TXA& txa, int mp)
{
BANDPASS *a;
a = txa.bp0.p;
if (mp != a->mp)
{
a->mp = mp;
FIRCORE::setMp_fircore (a->p, a->mp);
}
a = txa.bp1.p;
if (mp != a->mp)
{
a->mp = mp;
FIRCORE::setMp_fircore (a->p, a->mp);
}
a = txa.bp2.p;
if (mp != a->mp)
{
a->mp = mp;
FIRCORE::setMp_fircore (a->p, a->mp);
}
}
} // namespace WDSP
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