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https://github.com/f4exb/sdrangel.git
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XTRX MIMO
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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 <algorithm>
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#include <chrono>
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#include <thread>
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#include "dsp/samplemofifo.h"
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#include "xtrxmothread.h"
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XTRXMOThread::XTRXMOThread(struct xtrx_dev *dev, QObject* parent) :
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QThread(parent),
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m_running(false),
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m_dev(dev),
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m_sampleFifo(nullptr)
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{
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qDebug("XTRXMOThread::XTRXMOThread");
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m_buf = new qint16[2*DeviceXTRX::blockSize*2];
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std::fill(m_buf, m_buf + 2*DeviceXTRX::blockSize*2, 0);
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}
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XTRXMOThread::~XTRXMOThread()
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{
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qDebug("XTRXMOThread::~XTRXMOThread");
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if (m_running) {
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stopWork();
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}
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delete[] m_buf;
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}
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void XTRXMOThread::startWork()
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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 XTRXMOThread::stopWork()
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{
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m_running = false;
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wait();
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}
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void XTRXMOThread::setLog2Interpolation(unsigned int log2Interp)
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{
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qDebug("XTRXMOThread::setLog2Interpolation: %u", log2Interp);
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m_log2Interp = log2Interp;
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}
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unsigned int XTRXMOThread::getLog2Interpolation() const
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{
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return m_log2Interp;
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}
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void XTRXMOThread::run()
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{
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int res;
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m_running = true;
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m_startWaiter.wakeAll();
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xtrx_run_params params;
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xtrx_run_params_init(¶ms);
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params.dir = XTRX_TX;
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params.tx_repeat_buf = 0;
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params.tx.paketsize = 2*DeviceXTRX::blockSize;
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params.tx.chs = XTRX_CH_AB;
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params.tx.wfmt = XTRX_WF_16;
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params.tx.hfmt = XTRX_IQ_INT16;
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params.tx.flags |= XTRX_RSP_SWAP_IQ;
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res = xtrx_run_ex(m_dev, ¶ms);
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if (res != 0)
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{
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qCritical("XTRXMOThread::run: could not start stream err:%d", res);
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m_running = false;
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}
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else
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{
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std::this_thread::sleep_for(std::chrono::milliseconds(50));
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qDebug("XTRXMOThread::run: stream started");
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}
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qint16 buf0[2*DeviceXTRX::blockSize]; // I+Q = 2x16 bit samples
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qint16 buf1[2*DeviceXTRX::blockSize];
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std::vector<void *> buffs(2);
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master_ts ts = 4096*1024;
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buffs[0] = &buf0;
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buffs[1] = &buf1;
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xtrx_send_ex_info_t nfo;
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nfo.samples = DeviceXTRX::blockSize;
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nfo.buffer_count = 2;
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nfo.buffers = (void* const*) buffs.data();
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nfo.flags = XTRX_TX_DONT_BUFFER; // | XTRX_TX_SEND_ZEROS;
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nfo.timeout = 0;
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nfo.out_txlatets = 0;
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nfo.ts = ts;
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while (m_running)
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{
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callback(buf0, buf1, nfo.samples);
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res = xtrx_send_sync_ex(m_dev, &nfo);
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if (res < 0)
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{
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qCritical("XTRXMOThread::run send error: %d", res);
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qDebug("XTRXMOThread::run: out_samples: %u out_flags: %u", nfo.out_samples, nfo.out_flags);
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break;
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}
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if (nfo.out_flags & XTRX_TX_DISCARDED_TO) {
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qDebug("XTRXMOThread::run: underrun");
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}
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if (nfo.out_txlatets) {
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qDebug("XTRXMOThread::run: out_txlatets: %lu", nfo.out_txlatets);
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}
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nfo.ts += DeviceXTRX::blockSize;
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}
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res = xtrx_stop(m_dev, XTRX_TX);
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if (res != 0)
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{
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qCritical("XTRXMOThread::run: could not stop stream");
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}
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else
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{
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std::this_thread::sleep_for(std::chrono::milliseconds(50));
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qDebug("XTRXMOThread::run: stream stopped");
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}
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m_running = false;
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}
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void XTRXMOThread::callback(qint16* buf0, qint16* buf1, qint32 samplesPerChannel)
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{
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unsigned int iPart1Begin, iPart1End, iPart2Begin, iPart2End;
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m_sampleFifo->readSync(samplesPerChannel/(1<<m_log2Interp), iPart1Begin, iPart1End, iPart2Begin, iPart2End);
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if (iPart1Begin != iPart1End)
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{
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callbackPart(buf0, buf1, (iPart1End - iPart1Begin)*(1<<m_log2Interp), iPart1Begin);
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}
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if (iPart2Begin != iPart2End)
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{
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unsigned int shift = (iPart1End - iPart1Begin)*(1<<m_log2Interp);
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callbackPart(buf0 + 2*shift, buf1 + 2*shift, (iPart2End - iPart2Begin)*(1<<m_log2Interp), iPart2Begin);
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}
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}
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// Interpolate according to specified log2 (ex: log2=4 => decim=16). len is a number of samples (not a number of I or Q)
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void XTRXMOThread::callbackPart(qint16* buf0, qint16* buf1, qint32 nSamples, int iBegin)
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{
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for (unsigned int channel = 0; channel < 2; channel++)
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{
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SampleVector::iterator begin = m_sampleFifo->getData(channel).begin() + iBegin;
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if (m_log2Interp == 0)
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{
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m_interpolators[channel].interpolate1(
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&begin,
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channel == 0 ? buf0 : buf1,
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2*nSamples);
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}
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else
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{
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switch (m_log2Interp)
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{
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case 1:
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m_interpolators[channel].interpolate2_cen(
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&begin,
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channel == 0 ? buf0 : buf1,
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2*nSamples);
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break;
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case 2:
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m_interpolators[channel].interpolate4_cen(
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&begin,
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channel == 0 ? buf0 : buf1,
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2*nSamples);
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break;
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case 3:
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m_interpolators[channel].interpolate8_cen(
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&begin,
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channel == 0 ? buf0 : buf1,
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2*nSamples);
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break;
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case 4:
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m_interpolators[channel].interpolate16_cen(
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&begin,
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channel == 0 ? buf0 : buf1,
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2*nSamples);
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break;
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case 5:
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m_interpolators[channel].interpolate32_cen(
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&begin,
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channel == 0 ? buf0 : buf1,
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2*nSamples);
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break;
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case 6:
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m_interpolators[channel].interpolate64_cen(
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&begin,
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channel == 0 ? buf0 : buf1,
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2*nSamples);
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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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}
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}
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