Refactored WDSP initial commit

wdsp/delay.cpp

@@ -0,0 +1,141 @@
+/*  delay.c
+
+This file is part of a program that implements a Software-Defined Radio.
+
+Copyright (C) 2013, 2019 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 "delay.hpp"
+#include "fir.hpp"
+
+namespace WDSP {
+
+DELAY* create_delay (int run, int size, double* in, double* out, int rate, double tdelta, double tdelay)
+{
+    DELAY *a = new DELAY;
+    a->run = run;
+    a->size = size;
+    a->in = in;
+    a->out = out;
+    a->rate = rate;
+    a->tdelta = tdelta;
+    a->tdelay = tdelay;
+    a->L = (int)(0.5 + 1.0 / (a->tdelta * (double)a->rate));
+    a->adelta = 1.0 / (a->rate * a->L);
+    a->ft = 0.45 / (double)a->L;
+    a->ncoef = (int)(60.0 / a->ft);
+    a->ncoef = (a->ncoef / a->L + 1) * a->L;
+    a->cpp = a->ncoef / a->L;
+    a->phnum = (int)(0.5 + a->tdelay / a->adelta);
+    a->snum = a->phnum / a->L;
+    a->phnum %= a->L;
+    a->idx_in = 0;
+    a->adelay = a->adelta * (a->snum * a->L + a->phnum);
+    a->h = FIR::fir_bandpass (a->ncoef,-a->ft, +a->ft, 1.0, 1, 0, (double)a->L);
+    a->rsize = a->cpp + (WSDEL - 1);
+    a->ring = new double[a->rsize * 2]; // (double *) malloc0 (a->rsize * sizeof (complex));
+    return a;
+}
+
+void DELAY::destroy_delay (DELAY *a)
+{
+    delete[] (a->ring);
+    delete[] (a->h);
+    delete (a);
+}
+
+void DELAY::flush_delay (DELAY *a)
+{
+    memset (a->ring, 0, a->cpp * sizeof (dcomplex));
+    a->idx_in = 0;
+}
+
+void DELAY::xdelay (DELAY *a)
+{
+    a->cs_update.lock();
+    if (a->run)
+    {
+        int i, j, k, idx, n;
+        double Itmp, Qtmp;
+        for (i = 0; i < a->size; i++)
+        {
+            a->ring[2 * a->idx_in + 0] = a->in[2 * i + 0];
+            a->ring[2 * a->idx_in + 1] = a->in[2 * i + 1];
+            Itmp = 0.0;
+            Qtmp = 0.0;
+            if ((n = a->idx_in + a->snum) >= a->rsize) n -= a->rsize;
+            for (j = 0, k = a->L - 1 - a->phnum; j < a->cpp; j++, k+= a->L)
+            {
+                if ((idx = n + j) >= a->rsize) idx -= a->rsize;
+                Itmp += a->ring[2 * idx + 0] * a->h[k];
+                Qtmp += a->ring[2 * idx + 1] * a->h[k];
+            }
+            a->out[2 * i + 0] = Itmp;
+            a->out[2 * i + 1] = Qtmp;
+            if (--a->idx_in < 0) a->idx_in = a->rsize - 1;
+        }
+    }
+    else if (a->out != a->in)
+        memcpy (a->out, a->in, a->size * sizeof (dcomplex));
+    a->cs_update.unlock();
+}
+
+/********************************************************************************************************
+*                                                                                                       *
+*                                             Properties                                                *
+*                                                                                                       *
+********************************************************************************************************/
+
+void DELAY::SetDelayRun (DELAY *a, int run)
+{
+    a->cs_update.lock();
+    a->run = run;
+    a->cs_update.unlock();
+}
+
+double DELAY::SetDelayValue (DELAY *a, double tdelay)
+{
+    double adelay;
+    a->cs_update.lock();
+    a->tdelay = tdelay;
+    a->phnum = (int)(0.5 + a->tdelay / a->adelta);
+    a->snum = a->phnum / a->L;
+    a->phnum %= a->L;
+    a->adelay = a->adelta * (a->snum * a->L + a->phnum);
+    adelay = a->adelay;
+    a->cs_update.unlock();
+    return adelay;
+}
+
+void DELAY::SetDelayBuffs (DELAY *a, int size, double* in, double* out)
+{
+    a->cs_update.lock();
+    a->size = size;
+    a->in = in;
+    a->out = out;
+    a->cs_update.unlock();
+}
+
+} // namespace WDSP
+