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sdrangel/wdsp/iqc.cpp

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/* iqc.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 <thread>
#include <chrono>
#include "comm.hpp"
#include "iqc.hpp"
#include "TXA.hpp"
namespace WDSP {
void IQC::size_iqc (IQC *a)
{
int i;
a->t = new float[a->ints + 1]; // (float *) malloc0 ((a->ints + 1) * sizeof(float));
for (i = 0; i <= a->ints; i++)
a->t[i] = (float)i / (float)a->ints;
for (i = 0; i < 2; i++)
{
a->cm[i] = new float[a->ints * 4]; // (float *) malloc0 (a->ints * 4 * sizeof(float));
a->cc[i] = new float[a->ints * 4]; // (float *) malloc0 (a->ints * 4 * sizeof(float));
a->cs[i] = new float[a->ints * 4]; // (float *) malloc0 (a->ints * 4 * sizeof(float));
}
a->dog.cpi = new int[a->ints]; // (int *) malloc0 (a->ints * sizeof (int));
a->dog.count = 0;
a->dog.full_ints = 0;
}
void IQC::desize_iqc (IQC *a)
{
int i;
delete[] (a->dog.cpi);
for (i = 0; i < 2; i++)
{
delete[] (a->cm[i]);
delete[] (a->cc[i]);
delete[] (a->cs[i]);
}
delete[] (a->t);
}
void IQC::calc_iqc (IQC *a)
{
int i;
float delta, theta;
a->cset = 0;
a->count = 0;
a->state = 0;
a->busy = 0;
a->ntup = (int)(a->tup * a->rate);
a->cup = new float[a->ntup + 1]; // (float *) malloc0 ((a->ntup + 1) * sizeof (float));
delta = PI / (float)a->ntup;
theta = 0.0;
for (i = 0; i <= a->ntup; i++)
{
a->cup[i] = 0.5 * (1.0 - cos (theta));
theta += delta;
}
size_iqc (a);
}
void IQC::decalc_iqc (IQC *a)
{
desize_iqc (a);
delete[] (a->cup);
}
IQC* IQC::create_iqc (int run, int size, float* in, float* out, float rate, int ints, float tup, int spi)
{
IQC *a = new IQC;
a->run = run;
a->size = size;
a->in = in;
a->out = out;
a->rate = rate;
a->ints = ints;
a->tup = tup;
a->dog.spi = spi;
calc_iqc (a);
return a;
}
void IQC::destroy_iqc (IQC *a)
{
decalc_iqc (a);
delete (a);
}
void IQC::flush_iqc (IQC *)
{
}
enum _iqcstate
{
RUN = 0,
BEGIN,
SWAP,
END,
DONE
};
void IQC::xiqc (IQC *a)
{
if (a->run == 1)
{
int i, k, cset, mset;
float I, Q, env, dx, ym, yc, ys, PRE0, PRE1;
for (i = 0; i < a->size; i++)
{
I = a->in[2 * i + 0];
Q = a->in[2 * i + 1];
env = sqrt (I * I + Q * Q);
if ((k = (int)(env * a->ints)) > a->ints - 1) k = a->ints - 1;
dx = env - a->t[k];
cset = a->cset;
ym = a->cm[cset][4 * k + 0] + dx * (a->cm[cset][4 * k + 1] + dx * (a->cm[cset][4 * k + 2] + dx * a->cm[cset][4 * k + 3]));
yc = a->cc[cset][4 * k + 0] + dx * (a->cc[cset][4 * k + 1] + dx * (a->cc[cset][4 * k + 2] + dx * a->cc[cset][4 * k + 3]));
ys = a->cs[cset][4 * k + 0] + dx * (a->cs[cset][4 * k + 1] + dx * (a->cs[cset][4 * k + 2] + dx * a->cs[cset][4 * k + 3]));
PRE0 = ym * (I * yc - Q * ys);
PRE1 = ym * (I * ys + Q * yc);
switch (a->state)
{
case RUN:
if (a->dog.cpi[k] != a->dog.spi)
if (++a->dog.cpi[k] == a->dog.spi)
a->dog.full_ints++;
if (a->dog.full_ints == a->ints)
{
++a->dog.count;
a->dog.full_ints = 0;
memset (a->dog.cpi, 0, a->ints * sizeof (int));
}
break;
case BEGIN:
PRE0 = (1.0 - a->cup[a->count]) * I + a->cup[a->count] * PRE0;
PRE1 = (1.0 - a->cup[a->count]) * Q + a->cup[a->count] * PRE1;
if (a->count++ == a->ntup)
{
a->state = RUN;
a->count = 0;
a->busy = 0; // InterlockedBitTestAndReset (&a->busy, 0);
}
break;
case SWAP:
mset = 1 - cset;
ym = a->cm[mset][4 * k + 0] + dx * (a->cm[mset][4 * k + 1] + dx * (a->cm[mset][4 * k + 2] + dx * a->cm[mset][4 * k + 3]));
yc = a->cc[mset][4 * k + 0] + dx * (a->cc[mset][4 * k + 1] + dx * (a->cc[mset][4 * k + 2] + dx * a->cc[mset][4 * k + 3]));
ys = a->cs[mset][4 * k + 0] + dx * (a->cs[mset][4 * k + 1] + dx * (a->cs[mset][4 * k + 2] + dx * a->cs[mset][4 * k + 3]));
PRE0 = (1.0 - a->cup[a->count]) * ym * (I * yc - Q * ys) + a->cup[a->count] * PRE0;
PRE1 = (1.0 - a->cup[a->count]) * ym * (I * ys + Q * yc) + a->cup[a->count] * PRE1;
if (a->count++ == a->ntup)
{
a->state = RUN;
a->count = 0;
a->busy = 0; // InterlockedBitTestAndReset (&a->busy, 0);
}
break;
case END:
PRE0 = (1.0 - a->cup[a->count]) * PRE0 + a->cup[a->count] * I;
PRE1 = (1.0 - a->cup[a->count]) * PRE1 + a->cup[a->count] * Q;
if (a->count++ == a->ntup)
{
a->state = DONE;
a->count = 0;
a->busy = 0; // InterlockedBitTestAndReset (&a->busy, 0);
}
break;
case DONE:
PRE0 = I;
PRE1 = Q;
break;
}
a->out[2 * i + 0] = PRE0;
a->out[2 * i + 1] = PRE1;
// print_iqc_values("iqc.txt", a->state, env, PRE0, PRE1, ym, yc, ys, 1.1);
}
}
else if (a->out != a->in)
std::copy( a->in, a->in + a->size * 2, a->out);
}
void IQC::setBuffers_iqc (IQC *a, float* in, float* out)
{
a->in = in;
a->out = out;
}
void IQC::setSamplerate_iqc (IQC *a, int rate)
{
decalc_iqc (a);
a->rate = rate;
calc_iqc (a);
}
void IQC::setSize_iqc (IQC *a, int size)
{
a->size = size;
}
/********************************************************************************************************
* *
* TXA Properties *
* *
********************************************************************************************************/
void IQC::GetiqcValues (TXA& txa, float* cm, float* cc, float* cs)
{
IQC *a;
a = txa.iqc.p0;
memcpy (cm, a->cm[a->cset], a->ints * 4 * sizeof (float));
memcpy (cc, a->cc[a->cset], a->ints * 4 * sizeof (float));
memcpy (cs, a->cs[a->cset], a->ints * 4 * sizeof (float));
}
void IQC::SetiqcValues (TXA& txa, float* cm, float* cc, float* cs)
{
IQC *a;
a = txa.iqc.p0;
a->cset = 1 - a->cset;
memcpy (a->cm[a->cset], cm, a->ints * 4 * sizeof (float));
memcpy (a->cc[a->cset], cc, a->ints * 4 * sizeof (float));
memcpy (a->cs[a->cset], cs, a->ints * 4 * sizeof (float));
a->state = RUN;
}
void IQC::SetiqcSwap (TXA& txa, float* cm, float* cc, float* cs)
{
IQC *a = txa.iqc.p1;
a->cset = 1 - a->cset;
memcpy (a->cm[a->cset], cm, a->ints * 4 * sizeof (float));
memcpy (a->cc[a->cset], cc, a->ints * 4 * sizeof (float));
memcpy (a->cs[a->cset], cs, a->ints * 4 * sizeof (float));
a->busy = 1; // InterlockedBitTestAndSet (&a->busy, 0);
a->state = SWAP;
a->count = 0;
// while (_InterlockedAnd (&a->busy, 1)) Sleep(1);
while (a->busy == 1) {
std::this_thread::sleep_for(std::chrono::seconds(1));
}
}
void IQC::SetiqcStart (TXA& txa, float* cm, float* cc, float* cs)
{
IQC *a = txa.iqc.p1;
a->cset = 0;
memcpy (a->cm[a->cset], cm, a->ints * 4 * sizeof (float));
memcpy (a->cc[a->cset], cc, a->ints * 4 * sizeof (float));
memcpy (a->cs[a->cset], cs, a->ints * 4 * sizeof (float));
a->busy = 1; // InterlockedBitTestAndSet (&a->busy, 0);
a->state = BEGIN;
a->count = 0;
txa.iqc.p1->run = 1; //InterlockedBitTestAndSet (&txa.iqc.p1->run, 0);
// while (_InterlockedAnd (&a->busy, 1)) Sleep(1);
while (a->busy == 1) {
std::this_thread::sleep_for(std::chrono::seconds(1));
}
}
void IQC::SetiqcEnd (TXA& txa)
{
IQC *a = txa.iqc.p1;
a->busy = 1; // InterlockedBitTestAndSet (&a->busy, 0);
a->state = END;
a->count = 0;
// while (_InterlockedAnd (&a->busy, 1)) Sleep(1);
while (a->busy == 1) {
std::this_thread::sleep_for(std::chrono::seconds(1));
}
txa.iqc.p1->run = 0; //InterlockedBitTestAndReset (&txa.iqc.p1->run, 0);
}
void IQC::GetiqcDogCount (TXA& txa, int* count)
{
IQC *a = txa.iqc.p1;
*count = a->dog.count;
}
void IQC::SetiqcDogCount (TXA& txa, int count)
{
IQC *a = txa.iqc.p1;
a->dog.count = count;
}
} // namespace WDSP
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