mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-11 02:46:12 -05:00
600 lines
16 KiB
C++
600 lines
16 KiB
C++
/* gen.c
|
|
|
|
This file is part of a program that implements a Software-Defined Radio.
|
|
|
|
Copyright (C) 2013 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 <chrono>
|
|
|
|
#include "comm.hpp"
|
|
#include "gen.hpp"
|
|
#include "TXA.hpp"
|
|
|
|
namespace WDSP {
|
|
|
|
void GEN::calc_tone()
|
|
{
|
|
tone.phs = 0.0;
|
|
tone.delta = TWOPI * tone.freq / rate;
|
|
tone.cosdelta = cos (tone.delta);
|
|
tone.sindelta = sin (tone.delta);
|
|
}
|
|
|
|
void GEN::calc_tt()
|
|
{
|
|
tt.phs1 = 0.0;
|
|
tt.phs2 = 0.0;
|
|
tt.delta1 = TWOPI * tt.f1 / rate;
|
|
tt.delta2 = TWOPI * tt.f2 / rate;
|
|
tt.cosdelta1 = cos (tt.delta1);
|
|
tt.cosdelta2 = cos (tt.delta2);
|
|
tt.sindelta1 = sin (tt.delta1);
|
|
tt.sindelta2 = sin (tt.delta2);
|
|
}
|
|
|
|
void GEN::calc_sweep()
|
|
{
|
|
sweep.phs = 0.0;
|
|
sweep.dphs = TWOPI * sweep.f1 / rate;
|
|
sweep.d2phs = TWOPI * sweep.sweeprate / (rate * rate);
|
|
sweep.dphsmax = TWOPI * sweep.f2 / rate;
|
|
}
|
|
|
|
void GEN::calc_sawtooth()
|
|
{
|
|
saw.period = 1.0 / saw.f;
|
|
saw.delta = 1.0 / rate;
|
|
saw.t = 0.0;
|
|
}
|
|
|
|
void GEN::calc_triangle()
|
|
{
|
|
tri.period = 1.0 / tri.f;
|
|
tri.half = 0.5 * tri.period;
|
|
tri.delta = 1.0 / rate;
|
|
tri.t = 0.0;
|
|
tri.t1 = 0.0;
|
|
}
|
|
|
|
void GEN::calc_pulse ()
|
|
{
|
|
int i;
|
|
float delta, theta;
|
|
pulse.pperiod = 1.0 / pulse.pf;
|
|
pulse.tphs = 0.0;
|
|
pulse.tdelta = TWOPI * pulse.tf / rate;
|
|
pulse.tcosdelta = cos (pulse.tdelta);
|
|
pulse.tsindelta = sin (pulse.tdelta);
|
|
pulse.pntrans = (int)(pulse.ptranstime * rate);
|
|
pulse.pnon = (int)(pulse.pdutycycle * pulse.pperiod * rate);
|
|
pulse.pnoff = (int)(pulse.pperiod * rate) - pulse.pnon - 2 * pulse.pntrans;
|
|
|
|
if (pulse.pnoff < 0)
|
|
pulse.pnoff = 0;
|
|
|
|
pulse.pcount = pulse.pnoff;
|
|
pulse.state = 0;
|
|
pulse.ctrans = new float[pulse.pntrans + 1]; // (float *) malloc0 ((pulse.pntrans + 1) * sizeof (float));
|
|
delta = PI / (float)pulse.pntrans;
|
|
theta = 0.0;
|
|
for (i = 0; i <= pulse.pntrans; i++)
|
|
{
|
|
pulse.ctrans[i] = 0.5 * (1.0 - cos (theta));
|
|
theta += delta;
|
|
}
|
|
}
|
|
|
|
void GEN::calc()
|
|
{
|
|
calc_tone();
|
|
calc_tt();
|
|
calc_sweep();
|
|
calc_sawtooth();
|
|
calc_triangle();
|
|
calc_pulse();
|
|
}
|
|
|
|
void GEN::decalc()
|
|
{
|
|
delete[] (pulse.ctrans);
|
|
}
|
|
|
|
GEN::GEN(
|
|
int _run,
|
|
int _size,
|
|
float* _in,
|
|
float* _out,
|
|
int _rate,
|
|
int _mode
|
|
) :
|
|
run(_run),
|
|
size(_size),
|
|
in(_in),
|
|
out(_out),
|
|
rate((double) _rate),
|
|
mode(_mode)
|
|
{
|
|
// tone
|
|
tone.mag = 1.0;
|
|
tone.freq = 1000.0;
|
|
// two-tone
|
|
tt.mag1 = 0.5;
|
|
tt.mag2 = 0.5;
|
|
tt.f1 = + 900.0;
|
|
tt.f2 = + 1700.0;
|
|
// noise
|
|
srand ((unsigned int) time (0));
|
|
noise.mag = 1.0;
|
|
// sweep
|
|
sweep.mag = 1.0;
|
|
sweep.f1 = -20000.0;
|
|
sweep.f2 = +20000.0;
|
|
sweep.sweeprate = +4000.0;
|
|
// sawtooth
|
|
saw.mag = 1.0;
|
|
saw.f = 500.0;
|
|
// triangle
|
|
tri.mag = 1.0;
|
|
tri.f = 500.0;
|
|
// pulse
|
|
pulse.mag = 1.0;
|
|
pulse.pf = 0.25;
|
|
pulse.pdutycycle = 0.25;
|
|
pulse.ptranstime = 0.002;
|
|
pulse.tf = 1000.0;
|
|
calc();
|
|
}
|
|
|
|
GEN::~GEN()
|
|
{
|
|
decalc();
|
|
}
|
|
|
|
void GEN::flush()
|
|
{
|
|
pulse.state = 0;
|
|
}
|
|
|
|
enum pstate
|
|
{
|
|
OFF,
|
|
UP,
|
|
ON,
|
|
DOWN
|
|
};
|
|
|
|
void GEN::execute()
|
|
{
|
|
if (run)
|
|
{
|
|
switch (mode)
|
|
{
|
|
case 0: // tone
|
|
{
|
|
int i;
|
|
float t1, t2;
|
|
float cosphase = cos (tone.phs);
|
|
float sinphase = sin (tone.phs);
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
out[2 * i + 0] = + tone.mag * cosphase;
|
|
out[2 * i + 1] = - tone.mag * sinphase;
|
|
t1 = cosphase;
|
|
t2 = sinphase;
|
|
cosphase = t1 * tone.cosdelta - t2 * tone.sindelta;
|
|
sinphase = t1 * tone.sindelta + t2 * tone.cosdelta;
|
|
tone.phs += tone.delta;
|
|
if (tone.phs >= TWOPI) tone.phs -= TWOPI;
|
|
if (tone.phs < 0.0 ) tone.phs += TWOPI;
|
|
}
|
|
break;
|
|
}
|
|
case 1: // two-tone
|
|
{
|
|
int i;
|
|
float tcos, tsin;
|
|
float cosphs1 = cos (tt.phs1);
|
|
float sinphs1 = sin (tt.phs1);
|
|
float cosphs2 = cos (tt.phs2);
|
|
float sinphs2 = sin (tt.phs2);
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
out[2 * i + 0] = + tt.mag1 * cosphs1 + tt.mag2 * cosphs2;
|
|
out[2 * i + 1] = - tt.mag1 * sinphs1 - tt.mag2 * sinphs2;
|
|
tcos = cosphs1;
|
|
tsin = sinphs1;
|
|
cosphs1 = tcos * tt.cosdelta1 - tsin * tt.sindelta1;
|
|
sinphs1 = tcos * tt.sindelta1 + tsin * tt.cosdelta1;
|
|
tt.phs1 += tt.delta1;
|
|
if (tt.phs1 >= TWOPI) tt.phs1 -= TWOPI;
|
|
if (tt.phs1 < 0.0 ) tt.phs1 += TWOPI;
|
|
tcos = cosphs2;
|
|
tsin = sinphs2;
|
|
cosphs2 = tcos * tt.cosdelta2 - tsin * tt.sindelta2;
|
|
sinphs2 = tcos * tt.sindelta2 + tsin * tt.cosdelta2;
|
|
tt.phs2 += tt.delta2;
|
|
if (tt.phs2 >= TWOPI) tt.phs2 -= TWOPI;
|
|
if (tt.phs2 < 0.0 ) tt.phs2 += TWOPI;
|
|
}
|
|
break;
|
|
}
|
|
case 2: // noise
|
|
{
|
|
int i;
|
|
float r1, r2, c, rad;
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
do
|
|
{
|
|
r1 = 2.0 * (float)rand() / (float)RAND_MAX - 1.0;
|
|
r2 = 2.0 * (float)rand() / (float)RAND_MAX - 1.0;
|
|
c = r1 * r1 + r2 * r2;
|
|
} while (c >= 1.0);
|
|
rad = sqrt (-2.0 * log (c) / c);
|
|
out[2 * i + 0] = noise.mag * rad * r1;
|
|
out[2 * i + 1] = noise.mag * rad * r2;
|
|
}
|
|
break;
|
|
}
|
|
case 3: // sweep
|
|
{
|
|
int i;
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
out[2 * i + 0] = + sweep.mag * cos(sweep.phs);
|
|
out[2 * i + 1] = - sweep.mag * sin(sweep.phs);
|
|
sweep.phs += sweep.dphs;
|
|
sweep.dphs += sweep.d2phs;
|
|
if (sweep.phs >= TWOPI) sweep.phs -= TWOPI;
|
|
if (sweep.phs < 0.0 ) sweep.phs += TWOPI;
|
|
if (sweep.dphs > sweep.dphsmax)
|
|
sweep.dphs = TWOPI * sweep.f1 / rate;
|
|
}
|
|
break;
|
|
}
|
|
case 4: // sawtooth (audio only)
|
|
{
|
|
int i;
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
if (saw.t > saw.period) saw.t -= saw.period;
|
|
out[2 * i + 0] = saw.mag * (saw.t * saw.f - 1.0);
|
|
out[2 * i + 1] = 0.0;
|
|
saw.t += saw.delta;
|
|
}
|
|
}
|
|
break;
|
|
case 5: // triangle (audio only)
|
|
{
|
|
int i;
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
if (tri.t > tri.period) tri.t1 = tri.t -= tri.period;
|
|
if (tri.t > tri.half) tri.t1 -= tri.delta;
|
|
else tri.t1 += tri.delta;
|
|
out[2 * i + 0] = tri.mag * (4.0 * tri.t1 * tri.f - 1.0);
|
|
out[2 * i + 1] = 0.0;
|
|
tri.t += tri.delta;
|
|
}
|
|
}
|
|
break;
|
|
case 6: // pulse (audio only)
|
|
{
|
|
int i;
|
|
float t1, t2;
|
|
float cosphase = cos (pulse.tphs);
|
|
float sinphase = sin (pulse.tphs);
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
if (pulse.pnoff != 0)
|
|
switch (pulse.state)
|
|
{
|
|
case OFF:
|
|
out[2 * i + 0] = 0.0;
|
|
if (--pulse.pcount == 0)
|
|
{
|
|
pulse.state = UP;
|
|
pulse.pcount = pulse.pntrans;
|
|
}
|
|
break;
|
|
case UP:
|
|
out[2 * i + 0] = pulse.mag * cosphase * pulse.ctrans[pulse.pntrans - pulse.pcount];
|
|
if (--pulse.pcount == 0)
|
|
{
|
|
pulse.state = ON;
|
|
pulse.pcount = pulse.pnon;
|
|
}
|
|
break;
|
|
case ON:
|
|
out[2 * i + 0] = pulse.mag * cosphase;
|
|
if (--pulse.pcount == 0)
|
|
{
|
|
pulse.state = DOWN;
|
|
pulse.pcount = pulse.pntrans;
|
|
}
|
|
break;
|
|
case DOWN:
|
|
out[2 * i + 0] = pulse.mag * cosphase * pulse.ctrans[pulse.pcount];
|
|
if (--pulse.pcount == 0)
|
|
{
|
|
pulse.state = OFF;
|
|
pulse.pcount = pulse.pnoff;
|
|
}
|
|
break;
|
|
}
|
|
else
|
|
out[2 * i + 0] = 0.0;
|
|
out[2 * i + 1] = 0.0;
|
|
t1 = cosphase;
|
|
t2 = sinphase;
|
|
cosphase = t1 * pulse.tcosdelta - t2 * pulse.tsindelta;
|
|
sinphase = t1 * pulse.tsindelta + t2 * pulse.tcosdelta;
|
|
pulse.tphs += pulse.tdelta;
|
|
if (pulse.tphs >= TWOPI) pulse.tphs -= TWOPI;
|
|
if (pulse.tphs < 0.0 ) pulse.tphs += TWOPI;
|
|
}
|
|
}
|
|
break;
|
|
default: // silence
|
|
{
|
|
std::fill(out, out + size * 2, 0);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else if (in != out)
|
|
std::copy( in, in + size * 2, out);
|
|
}
|
|
|
|
void GEN::setBuffers(float* _in, float* _out)
|
|
{
|
|
in = _in;
|
|
out = _out;
|
|
}
|
|
|
|
void GEN::setSamplerate(int _rate)
|
|
{
|
|
decalc();
|
|
rate = _rate;
|
|
calc();
|
|
}
|
|
|
|
void GEN::setSize(int _size)
|
|
{
|
|
size = _size;
|
|
flush();
|
|
}
|
|
|
|
|
|
/********************************************************************************************************
|
|
* *
|
|
* Public Properties *
|
|
* *
|
|
********************************************************************************************************/
|
|
|
|
// 'PreGen', gen0
|
|
|
|
void GEN::SetPreRun(int _run)
|
|
{
|
|
run = _run;
|
|
}
|
|
|
|
void GEN::SetPreMode(int _mode)
|
|
{
|
|
mode = _mode;
|
|
}
|
|
|
|
void GEN::SetPreToneMag(float mag)
|
|
{
|
|
tone.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPreToneFreq(float freq)
|
|
{
|
|
tone.freq = freq;
|
|
calc_tone();
|
|
}
|
|
|
|
void GEN::SetPreNoiseMag (float mag)
|
|
{
|
|
noise.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPreSweepMag(float mag)
|
|
{
|
|
sweep.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPreSweepFreq(float freq1, float freq2)
|
|
{
|
|
sweep.f1 = freq1;
|
|
sweep.f2 = freq2;
|
|
calc_sweep();
|
|
}
|
|
|
|
void GEN::SetPreSweepRate(float rate)
|
|
{
|
|
sweep.sweeprate = rate;
|
|
calc_sweep();
|
|
}
|
|
|
|
|
|
/********************************************************************************************************
|
|
* *
|
|
* TXA Properties *
|
|
* *
|
|
********************************************************************************************************/
|
|
|
|
// 'PreGen', gen0
|
|
|
|
void GEN::SetPreGenRun (TXA& txa, int run)
|
|
{
|
|
txa.gen0.p->run = run;
|
|
}
|
|
|
|
void GEN::SetPreGenMode (TXA& txa, int mode)
|
|
{
|
|
txa.gen0.p->mode = mode;
|
|
}
|
|
|
|
void GEN::SetPreGenToneMag (TXA& txa, float mag)
|
|
{
|
|
txa.gen0.p->tone.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPreGenToneFreq (TXA& txa, float freq)
|
|
{
|
|
txa.gen0.p->tone.freq = freq;
|
|
txa.gen0.p->calc_tone();
|
|
}
|
|
|
|
void GEN::SetPreGenNoiseMag (TXA& txa, float mag)
|
|
{
|
|
txa.gen0.p->noise.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPreGenSweepMag (TXA& txa, float mag)
|
|
{
|
|
txa.gen0.p->sweep.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPreGenSweepFreq (TXA& txa, float freq1, float freq2)
|
|
{
|
|
txa.gen0.p->sweep.f1 = freq1;
|
|
txa.gen0.p->sweep.f2 = freq2;
|
|
txa.gen0.p->calc_sweep();
|
|
}
|
|
|
|
void GEN::SetPreGenSweepRate (TXA& txa, float rate)
|
|
{
|
|
txa.gen0.p->sweep.sweeprate = rate;
|
|
txa.gen0.p->calc_sweep();
|
|
}
|
|
|
|
void GEN::SetPreGenSawtoothMag (TXA& txa, float mag)
|
|
{
|
|
txa.gen0.p->saw.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPreGenSawtoothFreq (TXA& txa, float freq)
|
|
{
|
|
txa.gen0.p->saw.f = freq;
|
|
txa.gen0.p->calc_sawtooth();
|
|
}
|
|
|
|
void GEN::SetPreGenTriangleMag (TXA& txa, float mag)
|
|
{
|
|
txa.gen0.p->tri.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPreGenTriangleFreq (TXA& txa, float freq)
|
|
{
|
|
txa.gen0.p->tri.f = freq;
|
|
txa.gen0.p->calc_triangle();
|
|
}
|
|
|
|
void GEN::SetPreGenPulseMag (TXA& txa, float mag)
|
|
{
|
|
txa.gen0.p->pulse.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPreGenPulseFreq (TXA& txa, float freq)
|
|
{
|
|
txa.gen0.p->pulse.pf = freq;
|
|
txa.gen0.p->calc_pulse();
|
|
}
|
|
|
|
void GEN::SetPreGenPulseDutyCycle (TXA& txa, float dc)
|
|
{
|
|
txa.gen0.p->pulse.pdutycycle = dc;
|
|
txa.gen0.p->calc_pulse();
|
|
}
|
|
|
|
void GEN::SetPreGenPulseToneFreq (TXA& txa, float freq)
|
|
{
|
|
txa.gen0.p->pulse.tf = freq;
|
|
txa.gen0.p->calc_pulse();
|
|
}
|
|
|
|
void GEN::SetPreGenPulseTransition (TXA& txa, float transtime)
|
|
{
|
|
txa.gen0.p->pulse.ptranstime = transtime;
|
|
txa.gen0.p->calc_pulse();
|
|
}
|
|
|
|
// 'PostGen', gen1
|
|
|
|
void GEN::SetPostGenRun (TXA& txa, int run)
|
|
{
|
|
txa.gen1.p->run = run;
|
|
}
|
|
|
|
void GEN::SetPostGenMode (TXA& txa, int mode)
|
|
{
|
|
txa.gen1.p->mode = mode;
|
|
}
|
|
|
|
void GEN::SetPostGenToneMag (TXA& txa, float mag)
|
|
{
|
|
txa.gen1.p->tone.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPostGenToneFreq (TXA& txa, float freq)
|
|
{
|
|
txa.gen1.p->tone.freq = freq;
|
|
txa.gen1.p->calc_tone();
|
|
}
|
|
|
|
void GEN::SetPostGenTTMag (TXA& txa, float mag1, float mag2)
|
|
{
|
|
txa.gen1.p->tt.mag1 = mag1;
|
|
txa.gen1.p->tt.mag2 = mag2;
|
|
}
|
|
|
|
void GEN::SetPostGenTTFreq (TXA& txa, float freq1, float freq2)
|
|
{
|
|
txa.gen1.p->tt.f1 = freq1;
|
|
txa.gen1.p->tt.f2 = freq2;
|
|
txa.gen1.p->calc_tt();
|
|
}
|
|
|
|
void GEN::SetPostGenSweepMag (TXA& txa, float mag)
|
|
{
|
|
txa.gen1.p->sweep.mag = mag;
|
|
}
|
|
|
|
void GEN::SetPostGenSweepFreq (TXA& txa, float freq1, float freq2)
|
|
{
|
|
txa.gen1.p->sweep.f1 = freq1;
|
|
txa.gen1.p->sweep.f2 = freq2;
|
|
txa.gen1.p->calc_sweep();
|
|
}
|
|
|
|
void GEN::SetPostGenSweepRate (TXA& txa, float rate)
|
|
{
|
|
txa.gen1.p->sweep.sweeprate = rate;
|
|
txa.gen1.p->calc_sweep();
|
|
}
|
|
|
|
} // namespace WDSP
|