PlutoSDR output: Windows build and fixed compilation errors

2026-06-05 07:24:44 -04:00 · 2017-09-19 14:32:39 +02:00
parent c2b7092026
commit 0aee699855
9 changed files with 377 additions and 17 deletions
@@ -0,0 +1,149 @@
+///////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2017 Edouard Griffiths, F4EXB                                   //
+//                                                                               //
+// 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 as version 3 of the License, or                  //
+//                                                                               //
+// 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 V3 for more details.                               //
+//                                                                               //
+// You should have received a copy of the GNU General Public License             //
+// along with this program. If not, see <http://www.gnu.org/licenses/>.          //
+///////////////////////////////////////////////////////////////////////////////////
+
+#include <unistd.h>
+
+#include "plutosdr/deviceplutosdrbox.h"
+#include "plutosdroutputsettings.h"
+#include "iio.h"
+#include "plutosdroutputthread.h"
+
+PlutoSDROutputThread::PlutoSDROutputThread(uint32_t blocksizeSamples, DevicePlutoSDRBox* plutoBox, SampleSourceFifo* sampleFifo, QObject* parent) :
+    QThread(parent),
+    m_running(false),
+    m_plutoBox(plutoBox),
+    m_blockSizeSamples(blocksizeSamples),
+    m_sampleFifo(sampleFifo),
+    m_log2Interp(0)
+{
+    m_buf     = new qint16[blocksizeSamples*(sizeof(Sample)/sizeof(qint16))];
+//    m_bufConv = new qint16[blocksizeSamples*(sizeof(Sample)/sizeof(qint16))];
+}
+
+PlutoSDROutputThread::~PlutoSDROutputThread()
+{
+    stopWork();
+    delete[] m_buf;
+}
+
+void PlutoSDROutputThread::startWork()
+{
+    if (m_running) return; // return if running already
+
+    m_startWaitMutex.lock();
+    start();
+    while(!m_running)
+        m_startWaiter.wait(&m_startWaitMutex, 100);
+    m_startWaitMutex.unlock();
+}
+
+void PlutoSDROutputThread::stopWork()
+{
+    if (!m_running) return; // return if not running
+
+    m_running = false;
+    wait();
+}
+
+void PlutoSDROutputThread::setLog2Interpolation(unsigned int log2_interp)
+{
+    m_log2Interp = log2_interp;
+}
+
+void PlutoSDROutputThread::run()
+{
+    m_running = true;
+    m_startWaiter.wakeAll();
+
+    while (m_running)
+    {
+        ssize_t nbytes_tx;
+        char *p_dat, *p_end;
+        std::ptrdiff_t p_inc;
+        int ihs; // half sample index (I then Q to make a sample)
+
+        convert(m_buf, 2*m_blockSizeSamples); // size given in number of int16_t (I and Q interleaved)
+
+        // WRITE: Get pointers to TX buf and write IQ to TX buf port 0
+        p_inc = m_plutoBox->txBufferStep();
+        p_end = m_plutoBox->txBufferEnd();
+        ihs = 0;
+
+        // p_inc is 2 on a char* buffer therefore each iteration processes only the I or Q sample
+        // I and Q samples are processed one after the other
+        // conversion is not needed as samples are little endian
+
+        for (p_dat = m_plutoBox->txBufferFirst(), ihs = 0; p_dat < p_end; p_dat += p_inc, ihs++)
+        {
+            *((int16_t*)p_dat) = m_buf[ihs] << 4;
+        }
+
+        // Schedule TX buffer for sending
+        nbytes_tx = m_plutoBox->txBufferPush();
+
+        if (nbytes_tx < 0)
+        {
+            printf("PlutoSDRInputThread::run: error pushing buf %d\n", (int) nbytes_tx);
+            usleep(200000);
+            continue;
+        }
+    }
+
+    m_running = false;
+}
+
+// Decimate according to specified log2 (ex: log2=4 => decim=16)
+// len is in half samples (I or Q) thus the size up to which buf is filled
+// SampleVector contains full (I, Q) samples
+void PlutoSDROutputThread::convert(qint16* buf, qint32 len)
+{
+    // pull samples from baseband generator
+    SampleVector::iterator beginRead;
+    m_sampleFifo->readAdvance(beginRead, len/(2*(1<<m_log2Interp)));
+    beginRead -= len/2;
+
+    if (m_log2Interp == 0)
+    {
+        m_interpolators.interpolate1(&beginRead, buf, len);
+    }
+    else
+    {
+        switch (m_log2Interp)
+        {
+        case 1:
+            m_interpolators.interpolate2_cen(&beginRead, buf, len);
+            break;
+        case 2:
+            m_interpolators.interpolate4_cen(&beginRead, buf, len);
+            break;
+        case 3:
+            m_interpolators.interpolate8_cen(&beginRead, buf, len);
+            break;
+        case 4:
+            m_interpolators.interpolate16_cen(&beginRead, buf, len);
+            break;
+        case 5:
+            m_interpolators.interpolate32_cen(&beginRead, buf, len);
+            break;
+        case 6:
+            m_interpolators.interpolate64_cen(&beginRead, buf, len);
+            break;
+        default:
+            break;
+        }
+    }
+}
+