Refactored WDSP initial commit

2026-06-02 14:04:46 -04:00 · 2024-06-16 11:31:13 +02:00
parent 98baa03619
commit cd4ad2cc95
103 changed files with 53980 additions and 1 deletions
@@ -0,0 +1,132 @@
+/*  shift.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 "comm.hpp"
+#include "shift.hpp"
+#include "RXA.hpp"
+
+namespace WDSP {
+
+void SHIFT::calc_shift (SHIFT *a)
+{
+    a->delta = TWOPI * a->shift / a->rate;
+    a->cos_delta = cos (a->delta);
+    a->sin_delta = sin (a->delta);
+}
+
+SHIFT* SHIFT::create_shift (int run, int size, double* in, double* out, int rate, double fshift)
+{
+    SHIFT *a = new SHIFT;
+    a->run = run;
+    a->size = size;
+    a->in = in;
+    a->out = out;
+    a->rate = (double)rate;
+    a->shift = fshift;
+    a->phase = 0.0;
+    calc_shift (a);
+    return a;
+}
+
+void SHIFT::destroy_shift (SHIFT *a)
+{
+    delete (a);
+}
+
+void SHIFT::flush_shift (SHIFT *a)
+{
+    a->phase = 0.0;
+}
+
+void SHIFT::xshift (SHIFT *a)
+{
+    if (a->run)
+    {
+        int i;
+        double I1, Q1, t1, t2;
+        double cos_phase = cos (a->phase);
+        double sin_phase = sin (a->phase);
+        for (i = 0; i < a->size; i++)
+        {
+            I1 = a->in[2 * i + 0];
+            Q1 = a->in[2 * i + 1];
+            a->out[2 * i + 0] = I1 * cos_phase - Q1 * sin_phase;
+            a->out[2 * i + 1] = I1 * sin_phase + Q1 * cos_phase;
+            t1 = cos_phase;
+            t2 = sin_phase;
+            cos_phase = t1 * a->cos_delta - t2 * a->sin_delta;
+            sin_phase = t1 * a->sin_delta + t2 * a->cos_delta;
+            a->phase += a->delta;
+            if (a->phase >= TWOPI) a->phase -= TWOPI;
+            if (a->phase <   0.0 ) a->phase += TWOPI;
+        }
+    }
+    else if (a->in != a->out)
+        memcpy (a->out, a->in, a->size * sizeof (dcomplex));
+}
+
+void SHIFT::setBuffers_shift(SHIFT *a, double* in, double* out)
+{
+    a->in = in;
+    a->out = out;
+}
+
+void SHIFT::setSamplerate_shift (SHIFT *a, int rate)
+{
+    a->rate = rate;
+    a->phase = 0.0;
+    calc_shift(a);
+}
+
+void SHIFT::setSize_shift (SHIFT *a, int size)
+{
+    a->size = size;
+    flush_shift (a);
+}
+
+/********************************************************************************************************
+*                                                                                                       *
+*                                           RXA Properties                                              *
+*                                                                                                       *
+********************************************************************************************************/
+
+void SHIFT::SetShiftRun (RXA& rxa, int run)
+{
+    rxa.csDSP.lock();
+    rxa.shift.p->run = run;
+    rxa.csDSP.unlock();
+}
+
+void SHIFT::SetShiftFreq (RXA& rxa, double fshift)
+{
+    rxa.csDSP.lock();
+    rxa.shift.p->shift = fshift;
+    calc_shift (rxa.shift.p);
+    rxa.csDSP.unlock();
+}
+
+} // namespace WDSP