Add USRP device support.

2026-06-02 06:04:39 -04:00 · 2020-10-02 22:45:28 +01:00
parent ad55211abb
commit d4aa5d75b5
427 changed files with 10621 additions and 378 deletions
@@ -0,0 +1,202 @@
+///////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2017 Edouard Griffiths, F4EXB                                   //
+// Copyright (C) 2020 Jon Beniston, M7RCE                                        //
+//                                                                               //
+// 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                  //
+// (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 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 <errno.h>
+#include <algorithm>
+
+#include <QDebug>
+
+#include <uhd/types/stream_cmd.hpp>
+
+#include "usrpinputsettings.h"
+#include "usrpinputthread.h"
+
+USRPInputThread::USRPInputThread(uhd::rx_streamer::sptr stream, SampleSinkFifo* sampleFifo, QObject* parent) :
+    QThread(parent),
+    m_running(false),
+    m_stream(stream),
+    m_convertBuffer(DeviceUSRP::blockSize),
+    m_sampleFifo(sampleFifo),
+    m_log2Decim(0)
+{
+    std::fill(m_buf, m_buf + 2*DeviceUSRP::blockSize, 0);
+}
+
+USRPInputThread::~USRPInputThread()
+{
+    stopWork();
+}
+
+void USRPInputThread::startWork()
+{
+    if (m_running) return; // return if running already
+
+    try
+    {
+        uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
+        stream_cmd.num_samps  = size_t(0);
+        stream_cmd.stream_now = true;
+        stream_cmd.time_spec  = uhd::time_spec_t();
+
+        m_stream->issue_stream_cmd(stream_cmd);
+
+        // Reset stats
+        m_packets = 0;
+        m_overflows = 0;
+        m_timeouts = 0;
+
+        qDebug("USRPInputThread::startWork: stream started");
+    }
+    catch (std::exception& e)
+    {
+        qDebug() << "USRPInputThread::startWork: exception: " << e.what();
+    }
+
+    m_startWaitMutex.lock();
+    start();
+    while(!m_running)
+        m_startWaiter.wait(&m_startWaitMutex, 100);
+    m_startWaitMutex.unlock();
+}
+
+void USRPInputThread::stopWork()
+{
+    if (!m_running) return; // return if not running
+
+    m_running = false;
+    wait();
+
+    try
+    {
+        uhd::rx_metadata_t md;
+        uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
+        stream_cmd.stream_now = true;
+        m_stream->issue_stream_cmd(stream_cmd);
+
+        // Clear out any data left in the stream, otherwise we'll get an
+        // exception 'recv buffer smaller than vrt packet offset' when restarting
+        while (!md.end_of_burst)
+        {
+            try
+            {
+                //qDebug() << "USRPInputThread::stopWork: recing until end of burst";
+                m_stream->recv(m_buf, DeviceUSRP::blockSize, md);
+            }
+            catch (std::exception& e)
+            {
+                qDebug() << "USRPInputThread::stopWork: exception ignored while flushing buffers: " << e.what();
+            }
+        }
+
+        qDebug("USRPInputThread::stopWork: stream stopped");
+    }
+    catch (std::exception& e)
+    {
+        qDebug() << "USRPInputThread::stopWork: exception: " << e.what();
+    }
+}
+
+void USRPInputThread::setLog2Decimation(unsigned int log2_decim)
+{
+    m_log2Decim = log2_decim;
+}
+
+void USRPInputThread::run()
+{
+    uhd::rx_metadata_t md;
+
+    m_running = true;
+    m_startWaiter.wakeAll();
+
+    try
+    {
+        while (m_running)
+        {
+            const size_t samples_received = m_stream->recv(m_buf, DeviceUSRP::blockSize, md);
+
+            m_packets++;
+            if (samples_received != DeviceUSRP::blockSize)
+            {
+                qDebug("USRPInputThread::run - received %d/%d samples", samples_received, DeviceUSRP::blockSize);
+            }
+            if (md.error_code ==  uhd::rx_metadata_t::ERROR_CODE_TIMEOUT)
+            {
+                qDebug("USRPInputThread::run - timeout - ending thread");
+                m_timeouts++;
+                // It seems we can't recover after a timeout, so stop thread
+                m_running = false;
+            }
+            else if (md.error_code ==  uhd::rx_metadata_t::ERROR_CODE_OVERFLOW)
+            {
+                qDebug("USRPInputThread::run - overflow");
+                m_overflows++;
+            }
+
+            callbackIQ(m_buf, 2 * samples_received);
+        }
+    }
+    catch (std::exception& e)
+    {
+        qDebug() << "USRPInputThread::run: exception: " << e.what();
+    }
+
+    m_running = false;
+}
+
+//  Decimate according to specified log2 (ex: log2=4 => decim=16)
+void USRPInputThread::callbackIQ(const qint16* buf, qint32 len)
+{
+    SampleVector::iterator it = m_convertBuffer.begin();
+
+    switch (m_log2Decim)
+    {
+    case 0:
+        m_decimatorsIQ.decimate1(&it, buf, len);
+        break;
+    case 1:
+        m_decimatorsIQ.decimate2_cen(&it, buf, len);
+        break;
+    case 2:
+        m_decimatorsIQ.decimate4_cen(&it, buf, len);
+        break;
+    case 3:
+        m_decimatorsIQ.decimate8_cen(&it, buf, len);
+        break;
+    case 4:
+        m_decimatorsIQ.decimate16_cen(&it, buf, len);
+        break;
+    case 5:
+        m_decimatorsIQ.decimate32_cen(&it, buf, len);
+        break;
+    case 6:
+        m_decimatorsIQ.decimate64_cen(&it, buf, len);
+        break;
+    default:
+        break;
+    }
+
+    m_sampleFifo->write(m_convertBuffer.begin(), it);
+}
+
+void USRPInputThread::getStreamStatus(bool& active, quint32& overflows, quint32& timeouts)
+{
+    //qDebug() << "USRPInputThread::getStreamStatus " << m_packets << " " << m_overflows << " " << m_timeouts;
+    active = m_packets > 0;
+    overflows = m_overflows;
+    timeouts = m_timeouts;
+}