mirror of
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580 lines
16 KiB
C++
580 lines
16 KiB
C++
/* gen.c
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This file is part of a program that implements a Software-Defined Radio.
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Copyright (C) 2013 Warren Pratt, NR0V
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Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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The author can be reached by email at
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warren@wpratt.com
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*/
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#include <chrono>
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#include "comm.hpp"
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#include "gen.hpp"
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#include "TXA.hpp"
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namespace WDSP {
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void GEN::calc_tone()
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{
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tone.phs = 0.0;
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tone.delta = TWOPI * tone.freq / rate;
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tone.cosdelta = cos (tone.delta);
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tone.sindelta = sin (tone.delta);
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}
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void GEN::calc_tt()
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{
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tt.phs1 = 0.0;
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tt.phs2 = 0.0;
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tt.delta1 = TWOPI * tt.f1 / rate;
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tt.delta2 = TWOPI * tt.f2 / rate;
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tt.cosdelta1 = cos (tt.delta1);
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tt.cosdelta2 = cos (tt.delta2);
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tt.sindelta1 = sin (tt.delta1);
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tt.sindelta2 = sin (tt.delta2);
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}
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void GEN::calc_sweep()
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{
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sweep.phs = 0.0;
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sweep.dphs = TWOPI * sweep.f1 / rate;
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sweep.d2phs = TWOPI * sweep.sweeprate / (rate * rate);
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sweep.dphsmax = TWOPI * sweep.f2 / rate;
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}
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void GEN::calc_sawtooth()
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{
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saw.period = 1.0 / saw.f;
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saw.delta = 1.0 / rate;
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saw.t = 0.0;
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}
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void GEN::calc_triangle()
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{
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tri.period = 1.0 / tri.f;
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tri.half = 0.5 * tri.period;
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tri.delta = 1.0 / rate;
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tri.t = 0.0;
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tri.t1 = 0.0;
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}
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void GEN::calc_pulse ()
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{
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double delta;
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double theta;
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pulse.pperiod = 1.0 / pulse.pf;
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pulse.tphs = 0.0;
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pulse.tdelta = TWOPI * pulse.tf / rate;
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pulse.tcosdelta = cos (pulse.tdelta);
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pulse.tsindelta = sin (pulse.tdelta);
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pulse.pntrans = (int)(pulse.ptranstime * rate);
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pulse.pnon = (int)(pulse.pdutycycle * pulse.pperiod * rate);
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pulse.pnoff = (int)(pulse.pperiod * rate) - pulse.pnon - 2 * pulse.pntrans;
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if (pulse.pnoff < 0)
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pulse.pnoff = 0;
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pulse.pcount = pulse.pnoff;
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pulse.state = PState::OFF;
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pulse.ctrans.resize(pulse.pntrans + 1);
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delta = PI / (float)pulse.pntrans;
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theta = 0.0;
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for (int i = 0; i <= pulse.pntrans; i++)
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{
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pulse.ctrans[i] = 0.5 * (1.0 - cos (theta));
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theta += delta;
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}
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}
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void GEN::calc()
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{
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calc_tone();
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calc_tt();
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calc_sweep();
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calc_sawtooth();
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calc_triangle();
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calc_pulse();
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}
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GEN::GEN(
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int _run,
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int _size,
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float* _in,
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float* _out,
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int _rate,
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int _mode
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) :
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run(_run),
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size(_size),
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in(_in),
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out(_out),
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rate((double) _rate),
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mode(_mode)
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{
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// tone
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tone.mag = 1.0;
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tone.freq = 1000.0;
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// two-tone
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tt.mag1 = 0.5;
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tt.mag2 = 0.5;
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tt.f1 = + 900.0;
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tt.f2 = + 1700.0;
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// noise
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srand ((unsigned int) time (nullptr));
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noise.mag = 1.0;
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// sweep
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sweep.mag = 1.0;
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sweep.f1 = -20000.0;
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sweep.f2 = +20000.0;
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sweep.sweeprate = +4000.0;
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// sawtooth
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saw.mag = 1.0;
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saw.f = 500.0;
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// triangle
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tri.mag = 1.0;
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tri.f = 500.0;
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// pulse
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pulse.mag = 1.0;
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pulse.pf = 0.25;
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pulse.pdutycycle = 0.25;
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pulse.ptranstime = 0.002;
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pulse.tf = 1000.0;
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calc();
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}
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void GEN::flush()
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{
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pulse.state = PState::OFF;
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}
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void GEN::execute()
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{
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if (run)
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{
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switch (mode)
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{
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case 0: // tone
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{
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double t1;
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double t2;
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double cosphase = cos (tone.phs);
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double sinphase = sin (tone.phs);
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for (int i = 0; i < size; i++)
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{
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out[2 * i + 0] = (float) (+ tone.mag * cosphase);
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out[2 * i + 1] = (float) (- tone.mag * sinphase);
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t1 = cosphase;
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t2 = sinphase;
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cosphase = t1 * tone.cosdelta - t2 * tone.sindelta;
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sinphase = t1 * tone.sindelta + t2 * tone.cosdelta;
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tone.phs += tone.delta;
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if (tone.phs >= TWOPI) tone.phs -= TWOPI;
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if (tone.phs < 0.0 ) tone.phs += TWOPI;
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}
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break;
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}
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case 1: // two-tone
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{
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double tcos;
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double tsin;
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double cosphs1 = cos (tt.phs1);
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double sinphs1 = sin (tt.phs1);
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double cosphs2 = cos (tt.phs2);
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double sinphs2 = sin (tt.phs2);
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for (int i = 0; i < size; i++)
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{
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out[2 * i + 0] = (float) (+ tt.mag1 * cosphs1 + tt.mag2 * cosphs2);
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out[2 * i + 1] = (float) (- tt.mag1 * sinphs1 - tt.mag2 * sinphs2);
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tcos = cosphs1;
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tsin = sinphs1;
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cosphs1 = tcos * tt.cosdelta1 - tsin * tt.sindelta1;
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sinphs1 = tcos * tt.sindelta1 + tsin * tt.cosdelta1;
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tt.phs1 += tt.delta1;
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if (tt.phs1 >= TWOPI) tt.phs1 -= TWOPI;
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if (tt.phs1 < 0.0 ) tt.phs1 += TWOPI;
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tcos = cosphs2;
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tsin = sinphs2;
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cosphs2 = tcos * tt.cosdelta2 - tsin * tt.sindelta2;
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sinphs2 = tcos * tt.sindelta2 + tsin * tt.cosdelta2;
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tt.phs2 += tt.delta2;
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if (tt.phs2 >= TWOPI) tt.phs2 -= TWOPI;
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if (tt.phs2 < 0.0 ) tt.phs2 += TWOPI;
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}
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break;
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}
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case 2: // noise
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{
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double r1;
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double r2;
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double c;
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double rad;
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for (int i = 0; i < size; i++)
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{
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do
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{
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r1 = 2.0 * (double)rand() / (double)RAND_MAX - 1.0;
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r2 = 2.0 * (double)rand() / (double)RAND_MAX - 1.0;
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c = r1 * r1 + r2 * r2;
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} while (c >= 1.0);
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rad = sqrt (-2.0 * log (c) / c);
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out[2 * i + 0] = (float) (noise.mag * rad * r1);
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out[2 * i + 1] = (float) (noise.mag * rad * r2);
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}
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break;
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}
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case 3: // sweep
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{
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for (int i = 0; i < size; i++)
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{
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out[2 * i + 0] = (float) (+ sweep.mag * cos(sweep.phs));
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out[2 * i + 1] = (float) (- sweep.mag * sin(sweep.phs));
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sweep.phs += sweep.dphs;
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sweep.dphs += sweep.d2phs;
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if (sweep.phs >= TWOPI) sweep.phs -= TWOPI;
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if (sweep.phs < 0.0 ) sweep.phs += TWOPI;
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if (sweep.dphs > sweep.dphsmax)
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sweep.dphs = TWOPI * sweep.f1 / rate;
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}
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break;
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}
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case 4: // sawtooth (audio only)
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{
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for (int i = 0; i < size; i++)
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{
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if (saw.t > saw.period) saw.t -= saw.period;
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out[2 * i + 0] = (float) (saw.mag * (saw.t * saw.f - 1.0));
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out[2 * i + 1] = 0.0;
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saw.t += saw.delta;
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}
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}
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break;
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case 5: // triangle (audio only)
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{
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for (int i = 0; i < size; i++)
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{
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if (tri.t > tri.period) tri.t1 = tri.t -= tri.period;
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if (tri.t > tri.half) tri.t1 -= tri.delta;
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else tri.t1 += tri.delta;
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out[2 * i + 0] = (float) (tri.mag * (4.0 * tri.t1 * tri.f - 1.0));
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out[2 * i + 1] = 0.0;
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tri.t += tri.delta;
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}
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}
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break;
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case 6: // pulse (audio only)
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{
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double t1;
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double t2;
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double cosphase = cos (pulse.tphs);
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double sinphase = sin (pulse.tphs);
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for (int i = 0; i < size; i++)
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{
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if (pulse.pnoff != 0)
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switch (pulse.state)
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{
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case PState::OFF:
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out[2 * i + 0] = 0.0;
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if (--pulse.pcount == 0)
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{
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pulse.state = PState::UP;
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pulse.pcount = pulse.pntrans;
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}
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break;
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case PState::UP:
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out[2 * i + 0] = (float) (pulse.mag * cosphase * pulse.ctrans[pulse.pntrans - pulse.pcount]);
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if (--pulse.pcount == 0)
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{
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pulse.state = PState::ON;
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pulse.pcount = pulse.pnon;
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}
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break;
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case PState::ON:
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out[2 * i + 0] = (float) (pulse.mag * cosphase);
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if (--pulse.pcount == 0)
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{
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pulse.state = PState::DOWN;
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pulse.pcount = pulse.pntrans;
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}
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break;
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case PState::DOWN:
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out[2 * i + 0] = (float) (pulse.mag * cosphase * pulse.ctrans[pulse.pcount]);
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if (--pulse.pcount == 0)
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{
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pulse.state = PState::OFF;
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pulse.pcount = pulse.pnoff;
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}
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break;
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}
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else
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out[2 * i + 0] = 0.0;
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out[2 * i + 1] = 0.0;
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t1 = cosphase;
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t2 = sinphase;
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cosphase = t1 * pulse.tcosdelta - t2 * pulse.tsindelta;
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sinphase = t1 * pulse.tsindelta + t2 * pulse.tcosdelta;
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pulse.tphs += pulse.tdelta;
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if (pulse.tphs >= TWOPI) pulse.tphs -= TWOPI;
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if (pulse.tphs < 0.0 ) pulse.tphs += TWOPI;
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}
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}
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break;
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default: // silence
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{
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std::fill(out, out + size * 2, 0);
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break;
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}
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}
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}
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else if (in != out)
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std::copy( in, in + size * 2, out);
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}
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void GEN::setBuffers(float* _in, float* _out)
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{
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in = _in;
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out = _out;
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}
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void GEN::setSamplerate(int _rate)
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{
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rate = _rate;
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calc();
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}
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void GEN::setSize(int _size)
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{
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size = _size;
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flush();
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}
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/********************************************************************************************************
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* *
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* Public Properties *
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* *
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********************************************************************************************************/
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// 'PreGen', gen0
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void GEN::SetPreRun(int _run)
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{
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run = _run;
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}
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void GEN::SetPreMode(int _mode)
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{
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mode = _mode;
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}
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void GEN::SetPreToneMag(float mag)
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{
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tone.mag = mag;
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}
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void GEN::SetPreToneFreq(float freq)
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{
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tone.freq = freq;
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calc_tone();
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}
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void GEN::SetPreNoiseMag (float mag)
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{
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noise.mag = mag;
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}
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void GEN::SetPreSweepMag(float mag)
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{
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sweep.mag = mag;
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}
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void GEN::SetPreSweepFreq(float freq1, float freq2)
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{
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sweep.f1 = freq1;
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sweep.f2 = freq2;
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calc_sweep();
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}
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void GEN::SetPreSweepRate(float _rate)
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{
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sweep.sweeprate = _rate;
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calc_sweep();
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}
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/********************************************************************************************************
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* *
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* TXA Properties *
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* *
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********************************************************************************************************/
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// 'PreGen', gen0
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void GEN::SetPreGenRun (TXA& txa, int run)
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{
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txa.gen0->run = run;
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}
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void GEN::SetPreGenMode (TXA& txa, int mode)
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{
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txa.gen0->mode = mode;
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}
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void GEN::SetPreGenToneMag (TXA& txa, float mag)
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{
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txa.gen0->tone.mag = mag;
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}
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void GEN::SetPreGenToneFreq (TXA& txa, float freq)
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{
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txa.gen0->tone.freq = freq;
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txa.gen0->calc_tone();
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}
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void GEN::SetPreGenNoiseMag (TXA& txa, float mag)
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{
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txa.gen0->noise.mag = mag;
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}
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void GEN::SetPreGenSweepMag (TXA& txa, float mag)
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{
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txa.gen0->sweep.mag = mag;
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}
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void GEN::SetPreGenSweepFreq (TXA& txa, float freq1, float freq2)
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{
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txa.gen0->sweep.f1 = freq1;
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txa.gen0->sweep.f2 = freq2;
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txa.gen0->calc_sweep();
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}
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void GEN::SetPreGenSweepRate (TXA& txa, float rate)
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{
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txa.gen0->sweep.sweeprate = rate;
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txa.gen0->calc_sweep();
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}
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void GEN::SetPreGenSawtoothMag (TXA& txa, float mag)
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{
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txa.gen0->saw.mag = mag;
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}
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void GEN::SetPreGenSawtoothFreq (TXA& txa, float freq)
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{
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txa.gen0->saw.f = freq;
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txa.gen0->calc_sawtooth();
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}
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void GEN::SetPreGenTriangleMag (TXA& txa, float mag)
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{
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txa.gen0->tri.mag = mag;
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}
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void GEN::SetPreGenTriangleFreq (TXA& txa, float freq)
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{
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txa.gen0->tri.f = freq;
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txa.gen0->calc_triangle();
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}
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void GEN::SetPreGenPulseMag (TXA& txa, float mag)
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{
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txa.gen0->pulse.mag = mag;
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}
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void GEN::SetPreGenPulseFreq (TXA& txa, float freq)
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{
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txa.gen0->pulse.pf = freq;
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txa.gen0->calc_pulse();
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}
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void GEN::SetPreGenPulseDutyCycle (TXA& txa, float dc)
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{
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txa.gen0->pulse.pdutycycle = dc;
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txa.gen0->calc_pulse();
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}
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void GEN::SetPreGenPulseToneFreq (TXA& txa, float freq)
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{
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txa.gen0->pulse.tf = freq;
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txa.gen0->calc_pulse();
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}
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void GEN::SetPreGenPulseTransition (TXA& txa, float transtime)
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{
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txa.gen0->pulse.ptranstime = transtime;
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txa.gen0->calc_pulse();
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}
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// 'PostGen', gen1
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void GEN::SetPostGenRun (TXA& txa, int run)
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{
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txa.gen1->run = run;
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}
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void GEN::SetPostGenMode (TXA& txa, int mode)
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{
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txa.gen1->mode = mode;
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}
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void GEN::SetPostGenToneMag (TXA& txa, float mag)
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{
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txa.gen1->tone.mag = mag;
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}
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void GEN::SetPostGenToneFreq (TXA& txa, float freq)
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{
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txa.gen1->tone.freq = freq;
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txa.gen1->calc_tone();
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}
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|
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void GEN::SetPostGenTTMag (TXA& txa, float mag1, float mag2)
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{
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txa.gen1->tt.mag1 = mag1;
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txa.gen1->tt.mag2 = mag2;
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}
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|
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void GEN::SetPostGenTTFreq (TXA& txa, float freq1, float freq2)
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{
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|
txa.gen1->tt.f1 = freq1;
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txa.gen1->tt.f2 = freq2;
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txa.gen1->calc_tt();
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}
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|
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void GEN::SetPostGenSweepMag (TXA& txa, float mag)
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|
{
|
|
txa.gen1->sweep.mag = mag;
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|
}
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|
|
|
void GEN::SetPostGenSweepFreq (TXA& txa, float freq1, float freq2)
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|
{
|
|
txa.gen1->sweep.f1 = freq1;
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|
txa.gen1->sweep.f2 = freq2;
|
|
txa.gen1->calc_sweep();
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|
}
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|
|
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void GEN::SetPostGenSweepRate (TXA& txa, float rate)
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|
{
|
|
txa.gen1->sweep.sweeprate = rate;
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|
txa.gen1->calc_sweep();
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|
}
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|
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} // namespace WDSP
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