mirror of
https://github.com/f4exb/sdrangel.git
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242 lines
8.0 KiB
C++
242 lines
8.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017 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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// //
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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 "plutosdr/deviceplutosdrbox.h"
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#include "plutosdrinputsettings.h"
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#include "plutosdrinputthread.h"
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#include "iio.h"
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PlutoSDRInputThread::PlutoSDRInputThread(uint32_t blocksizeSamples, DevicePlutoSDRBox* plutoBox, SampleSinkFifo* sampleFifo, QObject* parent) :
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QThread(parent),
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m_running(false),
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m_plutoBox(plutoBox),
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m_blockSizeSamples(blocksizeSamples),
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m_convertBuffer(blocksizeSamples),
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m_convertIt(m_convertBuffer.begin()),
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m_sampleFifo(sampleFifo),
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m_log2Decim(0),
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m_fcPos(PlutoSDRInputSettings::FC_POS_CENTER),
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m_phasor(0)
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{
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m_buf = new qint16[blocksizeSamples*2]; // (I,Q) -> 2 * int16_t
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m_bufConv = new qint16[blocksizeSamples*2]; // (I,Q) -> 2 * int16_t
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}
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PlutoSDRInputThread::~PlutoSDRInputThread()
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{
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stopWork();
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delete[] m_buf;
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}
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void PlutoSDRInputThread::startWork()
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{
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if (m_running) return; // return if running already
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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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m_startWaitMutex.unlock();
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}
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void PlutoSDRInputThread::stopWork()
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{
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if (!m_running) return; // return if not running
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m_running = false;
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wait();
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}
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void PlutoSDRInputThread::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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void PlutoSDRInputThread::setFcPos(int fcPos)
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{
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m_fcPos = fcPos;
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}
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void PlutoSDRInputThread::run()
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{
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std::ptrdiff_t p_inc = m_plutoBox->rxBufferStep();
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qDebug("PlutoSDRInputThread::run: rxBufferStep: %ld bytes", p_inc);
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qDebug("PlutoSDRInputThread::run: Rx sample size is %ld bytes", m_plutoBox->getRxSampleSize());
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qDebug("PlutoSDRInputThread::run: Tx sample size is %ld bytes", m_plutoBox->getTxSampleSize());
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qDebug("PlutoSDRInputThread::run: nominal nbytes_rx is %d bytes with 2 refills", m_blockSizeSamples*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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ssize_t nbytes_rx;
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char *p_dat, *p_end;
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int ihs; // half sample index (I then Q to make a sample)
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// Refill RX buffer
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nbytes_rx = m_plutoBox->rxBufferRefill();
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if (nbytes_rx != m_blockSizeSamples*2)
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{
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qWarning("PlutoSDRInputThread::run: error refilling buf (1) %d / %d",(int) nbytes_rx, (int) m_blockSizeSamples*2);
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usleep(200000);
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continue;
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}
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// READ: Get pointers to RX buf and read IQ from RX buf port 0
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p_end = m_plutoBox->rxBufferEnd();
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ihs = 0;
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// p_inc is 2 on a char* buffer therefore each iteration processes only the I or Q sample
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// I and Q samples are processed one after the other
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// conversion is not needed as samples are little endian
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for (p_dat = m_plutoBox->rxBufferFirst(); p_dat < p_end; p_dat += p_inc)
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{
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m_buf[ihs] = *((int16_t *) p_dat);
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// iio_channel_convert(m_plutoBox->getRxChannel0(), (void *) &m_bufConv[ihs], (const void *) &m_buf[ihs]);
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ihs++;
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}
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// Refill RX buffer again - we still need twice more samples to complete since they come as I followed by Q
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nbytes_rx = m_plutoBox->rxBufferRefill();
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if (nbytes_rx != m_blockSizeSamples*2)
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{
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qWarning("PlutoSDRInputThread::run: error refilling buf (2) %d / %d",(int) nbytes_rx, (int) m_blockSizeSamples*2);
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usleep(200000);
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continue;
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}
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// READ: Get pointers to RX buf and read IQ from RX buf port 0
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p_end = m_plutoBox->rxBufferEnd();
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// p_inc is 2 on a char* buffer therefore each iteration processes only the I or Q sample
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// I and Q samples are processed one after the other
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// conversion is not needed as samples are little endian
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for (p_dat = m_plutoBox->rxBufferFirst(); p_dat < p_end; p_dat += p_inc)
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{
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m_buf[ihs] = *((int16_t *) p_dat);
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// iio_channel_convert(m_plutoBox->getRxChannel0(), (void *) &m_bufConv[ihs], (const void *) &m_buf[ihs]);
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ihs++;
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}
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//m_sampleFifo->write((unsigned char *) m_buf, ihs*sizeof(int16_t));
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convert(m_buf, 2*m_blockSizeSamples); // size given in number of int16_t (I and Q interleaved)
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}
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m_running = false;
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}
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// Decimate according to specified log2 (ex: log2=4 => decim=16)
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void PlutoSDRInputThread::convert(const qint16* buf, qint32 len)
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{
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SampleVector::iterator it = m_convertBuffer.begin();
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if (m_log2Decim == 0)
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{
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m_decimators.decimate1(&it, buf, len);
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}
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else
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{
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if (m_fcPos == 0) // Infra
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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.decimate2_inf(&it, buf, len);
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break;
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case 2:
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m_decimators.decimate4_inf(&it, buf, len);
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break;
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case 3:
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m_decimators.decimate8_inf(&it, buf, len);
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break;
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case 4:
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m_decimators.decimate16_inf(&it, buf, len);
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break;
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case 5:
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m_decimators.decimate32_inf(&it, buf, len);
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break;
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case 6:
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m_decimators.decimate64_inf(&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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else if (m_fcPos == 1) // Supra
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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.decimate2_sup(&it, buf, len);
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break;
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case 2:
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m_decimators.decimate4_sup(&it, buf, len);
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break;
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case 3:
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m_decimators.decimate8_sup(&it, buf, len);
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break;
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case 4:
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m_decimators.decimate16_sup(&it, buf, len);
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break;
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case 5:
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m_decimators.decimate32_sup(&it, buf, len);
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break;
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case 6:
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m_decimators.decimate64_sup(&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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else if (m_fcPos == 2) // Center
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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.decimate2_cen(&it, buf, len);
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break;
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case 2:
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m_decimators.decimate4_cen(&it, buf, len);
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break;
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case 3:
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m_decimators.decimate8_cen(&it, buf, len);
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break;
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case 4:
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m_decimators.decimate16_cen(&it, buf, len);
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break;
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case 5:
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m_decimators.decimate32_cen(&it, buf, len);
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break;
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case 6:
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m_decimators.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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}
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m_sampleFifo->write(m_convertBuffer.begin(), it);
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}
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