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Failed attempt at LimeSDRMIMO
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f4exb
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///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2020 Edouard Griffiths, F4EXB //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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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 V3 for more details. //
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// //
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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, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include "dsp/samplemififo.h"
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#include "limesdrmithread.h"
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LimeSDRMIThread::LimeSDRMIThread(lms_stream_t* stream0, lms_stream_t* stream1, QObject* parent) :
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QThread(parent),
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m_running(false),
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m_stream0(stream0),
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m_stream1(stream1),
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m_sampleFifo(nullptr)
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{
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qDebug("LimeSDRMIThread::LimeSDRMIThread");
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for (unsigned int i = 0; i < 2; i++) {
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m_convertBuffer[i].resize(DeviceLimeSDR::blockSize, Sample{0,0});
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}
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}
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LimeSDRMIThread::~LimeSDRMIThread()
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{
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qDebug("LimeSDRMIThread::~LimeSDRMIThread");
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if (m_running) {
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stopWork();
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}
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}
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void LimeSDRMIThread::startWork()
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{
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if (m_running) {
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return; // return if running already
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}
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if (m_stream0)
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{
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if (LMS_StartStream(m_stream0) < 0)
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{
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qCritical("LimeSDRMIThread::startWork: could not start stream 0");
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}
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else
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{
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usleep(50000);
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qDebug("LimeSDRMIThread::startWork: stream 0 started");
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}
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}
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if (m_stream1)
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{
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if (LMS_StartStream(m_stream1) < 0)
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{
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qCritical("LimeSDRMIThread::startWork: could not start stream 1");
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}
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else
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{
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usleep(50000);
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qDebug("LimeSDRMIThread::startWork: stream 1 started");
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}
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}
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m_startWaitMutex.lock();
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start();
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while(!m_running) {
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m_startWaiter.wait(&m_startWaitMutex, 100);
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}
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m_startWaitMutex.unlock();
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}
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void LimeSDRMIThread::stopWork()
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{
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if (!m_running) {
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return; // return if not running
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}
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m_running = false;
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wait();
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if (m_stream0)
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{
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if (LMS_StopStream(m_stream0) < 0)
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{
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qCritical("LimeSDRInputThread::stopWork: could not stop stream 0");
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}
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else
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{
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usleep(50000);
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qDebug("LimeSDRInputThread::stopWork: stream 0 stopped");
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}
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}
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if (m_stream1)
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{
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if (LMS_StopStream(m_stream1) < 0)
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{
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qCritical("LimeSDRInputThread::stopWork: could not stop stream 1");
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}
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else
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{
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usleep(50000);
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qDebug("LimeSDRInputThread::stopWork: stream 1 stopped");
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}
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}
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}
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void LimeSDRMIThread::setLog2Decimation(unsigned int log2_decim)
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{
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m_log2Decim = log2_decim;
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}
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unsigned int LimeSDRMIThread::getLog2Decimation() const
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{
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return m_log2Decim;
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}
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void LimeSDRMIThread::run()
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{
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int res;
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lms_stream_meta_t metadata; //Use metadata for additional control over sample receive function behaviour
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metadata.flushPartialPacket = false; //Do not discard data remainder when read size differs from packet size
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metadata.waitForTimestamp = false; //Do not wait for specific timestamps
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std::vector<SampleVector::const_iterator> vbegin;
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int lengths[2];
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m_running = true;
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m_startWaiter.wakeAll();
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while (m_running)
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{
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if (m_stream0)
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{
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res = LMS_RecvStream(m_stream0, (void *) m_buf[0], DeviceLimeSDR::blockSize, &metadata, 1000);
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if (res < 0)
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{
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qCritical("LimeSDRMIThread::run read stream 0 error: %s", strerror(errno));
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break;
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}
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lengths[0] = channelCallback(m_buf[0], 2*res, 0);
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}
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else
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{
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std::fill(m_convertBuffer[0].begin(), m_convertBuffer[0].end(), Sample{0,0});
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lengths[0] = m_convertBuffer[0].size();
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}
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vbegin.push_back(m_convertBuffer[0].begin());
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if (m_stream1)
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{
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res = LMS_RecvStream(m_stream1, (void *) m_buf[1], DeviceLimeSDR::blockSize, &metadata, 1000);
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if (res < 0)
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{
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qCritical("LimeSDRMIThread::run read stream 1 error: %s", strerror(errno));
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break;
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}
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lengths[1] = channelCallback(m_buf[1], 2*res, 1);
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}
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else
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{
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std::fill(m_convertBuffer[1].begin(), m_convertBuffer[1].end(), Sample{0,0});
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lengths[1] = m_convertBuffer[1].size();
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}
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vbegin.push_back(m_convertBuffer[1].begin());
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if (lengths[0] == lengths[1])
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{
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m_sampleFifo->writeSync(vbegin, lengths[0]);
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}
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else
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{
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qWarning("LimeSDRMIThread::run: unequal channel lengths: [0]=%d [1]=%d", lengths[0], lengths[1]);
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m_sampleFifo->writeSync(vbegin, (std::min)(lengths[0], lengths[1]));
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}
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}
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m_running = false;
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}
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int LimeSDRMIThread::channelCallback(const qint16* buf, qint32 len, int channel)
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{
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SampleVector::iterator it = m_convertBuffer[channel].begin();
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if (m_log2Decim == 0)
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{
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m_decimators[channel].decimate1(&it, buf, len);
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}
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else
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{
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switch (m_log2Decim)
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{
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case 1:
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m_decimators[channel].decimate2_cen(&it, buf, len);
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break;
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case 2:
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m_decimators[channel].decimate4_cen(&it, buf, len);
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break;
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case 3:
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m_decimators[channel].decimate8_cen(&it, buf, len);
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break;
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case 4:
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m_decimators[channel].decimate16_cen(&it, buf, len);
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break;
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case 5:
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m_decimators[channel].decimate32_cen(&it, buf, len);
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break;
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case 6:
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m_decimators[channel].decimate64_cen(&it, buf, len);
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break;
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default:
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break;
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}
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}
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return it - m_convertBuffer[channel].begin();
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}
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