/////////////////////////////////////////////////////////////////////////////////// // Copyright (C) 2016-2021 Edouard Griffiths, F4EXB // // Copyright (C) 2020 Felix Schneider // // // // 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 . // /////////////////////////////////////////////////////////////////////////////////// #include "plutosdr/deviceplutosdrbox.h" #include "plutosdrinputsettings.h" #include "plutosdrinputthread.h" PlutoSDRInputThread::PlutoSDRInputThread(uint32_t blocksizeSamples, DevicePlutoSDRBox* plutoBox, SampleSinkFifo* sampleFifo, QObject* parent) : QThread(parent), m_running(false), m_plutoBox(plutoBox), m_blockSizeSamples(blocksizeSamples), m_convertBuffer(blocksizeSamples), m_convertIt(m_convertBuffer.begin()), m_sampleFifo(sampleFifo), m_log2Decim(0), m_fcPos(PlutoSDRInputSettings::FC_POS_CENTER), m_phasor(0), m_iqOrder(true) { m_buf = new qint16[blocksizeSamples*2]; // (I,Q) -> 2 * int16_t m_bufConv = new qint16[blocksizeSamples*2]; // (I,Q) -> 2 * int16_t } PlutoSDRInputThread::~PlutoSDRInputThread() { stopWork(); delete[] m_buf; } void PlutoSDRInputThread::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 PlutoSDRInputThread::stopWork() { if (!m_running) return; // return if not running m_running = false; wait(); } void PlutoSDRInputThread::setLog2Decimation(unsigned int log2_decim) { m_log2Decim = log2_decim; } void PlutoSDRInputThread::setFcPos(int fcPos) { m_fcPos = fcPos; } void PlutoSDRInputThread::run() { std::ptrdiff_t p_inc = m_plutoBox->rxBufferStep(); qDebug("PlutoSDRInputThread::run: rxBufferStep: %ld bytes", p_inc); qDebug("PlutoSDRInputThread::run: Rx sample size is %ld bytes", m_plutoBox->getRxSampleSize()); qDebug("PlutoSDRInputThread::run: Tx sample size is %ld bytes", m_plutoBox->getTxSampleSize()); qDebug("PlutoSDRInputThread::run: nominal nbytes_rx is %d bytes with 1 refill", m_blockSizeSamples*4); m_running = true; m_startWaiter.wakeAll(); while (m_running) { ssize_t nbytes_rx; char *p_dat, *p_end; int ihs; // half sample index (I then Q to make a sample) // Refill RX buffer nbytes_rx = m_plutoBox->rxBufferRefill(); if (nbytes_rx != m_blockSizeSamples*4) { qWarning("PlutoSDRInputThread::run: error refilling buf %d / %d",(int) nbytes_rx, (int) m_blockSizeSamples*4); usleep(200000); continue; } // READ: Get pointers to RX buf and read IQ from RX buf port 0 p_end = m_plutoBox->rxBufferEnd(); ihs = 0; // p_inc is 4 on a char* buffer therefore each iteration processes a single IQ sample, // I and Q each being two bytes // conversion is not needed as samples are little endian for (p_dat = m_plutoBox->rxBufferFirst(); p_dat < p_end; p_dat += p_inc) { m_buf[ihs++] = *((int16_t *) p_dat); m_buf[ihs++] = *(((int16_t *) p_dat) + 1); } if (m_iqOrder) { convertIQ(m_buf, 2*m_blockSizeSamples); // size given in number of int16_t (I and Q interleaved) } else { convertQI(m_buf, 2*m_blockSizeSamples); } } m_running = false; } // Decimate according to specified log2 (ex: log2=4 => decim=16) void PlutoSDRInputThread::convertIQ(const qint16* buf, qint32 len) { SampleVector::iterator it = m_convertBuffer.begin(); if (m_log2Decim == 0) { m_decimatorsIQ.decimate1(&it, buf, len); } else { if (m_fcPos == 0) // Infra { switch (m_log2Decim) { case 1: m_decimatorsIQ.decimate2_inf(&it, buf, len); break; case 2: m_decimatorsIQ.decimate4_inf(&it, buf, len); break; case 3: m_decimatorsIQ.decimate8_inf(&it, buf, len); break; case 4: m_decimatorsIQ.decimate16_inf(&it, buf, len); break; case 5: m_decimatorsIQ.decimate32_inf(&it, buf, len); break; case 6: m_decimatorsIQ.decimate64_inf(&it, buf, len); break; default: break; } } else if (m_fcPos == 1) // Supra { switch (m_log2Decim) { case 1: m_decimatorsIQ.decimate2_sup(&it, buf, len); break; case 2: m_decimatorsIQ.decimate4_sup(&it, buf, len); break; case 3: m_decimatorsIQ.decimate8_sup(&it, buf, len); break; case 4: m_decimatorsIQ.decimate16_sup(&it, buf, len); break; case 5: m_decimatorsIQ.decimate32_sup(&it, buf, len); break; case 6: m_decimatorsIQ.decimate64_sup(&it, buf, len); break; default: break; } } else if (m_fcPos == 2) // Center { switch (m_log2Decim) { 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 PlutoSDRInputThread::convertQI(const qint16* buf, qint32 len) { SampleVector::iterator it = m_convertBuffer.begin(); if (m_log2Decim == 0) { m_decimatorsQI.decimate1(&it, buf, len); } else { if (m_fcPos == 0) // Infra { switch (m_log2Decim) { case 1: m_decimatorsQI.decimate2_inf(&it, buf, len); break; case 2: m_decimatorsQI.decimate4_inf(&it, buf, len); break; case 3: m_decimatorsQI.decimate8_inf(&it, buf, len); break; case 4: m_decimatorsQI.decimate16_inf(&it, buf, len); break; case 5: m_decimatorsQI.decimate32_inf(&it, buf, len); break; case 6: m_decimatorsQI.decimate64_inf(&it, buf, len); break; default: break; } } else if (m_fcPos == 1) // Supra { switch (m_log2Decim) { case 1: m_decimatorsQI.decimate2_sup(&it, buf, len); break; case 2: m_decimatorsQI.decimate4_sup(&it, buf, len); break; case 3: m_decimatorsQI.decimate8_sup(&it, buf, len); break; case 4: m_decimatorsQI.decimate16_sup(&it, buf, len); break; case 5: m_decimatorsQI.decimate32_sup(&it, buf, len); break; case 6: m_decimatorsQI.decimate64_sup(&it, buf, len); break; default: break; } } else if (m_fcPos == 2) // Center { switch (m_log2Decim) { case 1: m_decimatorsQI.decimate2_cen(&it, buf, len); break; case 2: m_decimatorsQI.decimate4_cen(&it, buf, len); break; case 3: m_decimatorsQI.decimate8_cen(&it, buf, len); break; case 4: m_decimatorsQI.decimate16_cen(&it, buf, len); break; case 5: m_decimatorsQI.decimate32_cen(&it, buf, len); break; case 6: m_decimatorsQI.decimate64_cen(&it, buf, len); break; default: break; } } } m_sampleFifo->write(m_convertBuffer.begin(), it); }