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347 lines
10 KiB
C++
347 lines
10 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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// Copyright (C) 2014 John Greb <hexameron@spam.no> //
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// Copyright (C) 2015-2020 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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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 <QDebug>
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#include <stdio.h>
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#include <errno.h>
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#include "rtlsdrthread.h"
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#include "dsp/samplesinkfifo.h"
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#define FCD_BLOCKSIZE 16384
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RTLSDRThread::RTLSDRThread(rtlsdr_dev_t* dev, SampleSinkFifo* sampleFifo, ReplayBuffer<quint8> *replayBuffer, 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_convertBuffer(FCD_BLOCKSIZE),
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m_sampleFifo(sampleFifo),
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m_replayBuffer(replayBuffer),
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m_samplerate(288000),
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m_log2Decim(4),
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m_fcPos(0),
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m_iqOrder(true)
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{
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}
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RTLSDRThread::~RTLSDRThread()
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{
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stopWork();
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}
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void RTLSDRThread::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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m_startWaitMutex.unlock();
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}
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void RTLSDRThread::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 RTLSDRThread::setSamplerate(int samplerate)
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{
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m_samplerate = samplerate;
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}
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void RTLSDRThread::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 RTLSDRThread::setFcPos(int fcPos)
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{
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m_fcPos = fcPos;
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}
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void RTLSDRThread::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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while(m_running) {
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if((res = rtlsdr_read_async(m_dev, &RTLSDRThread::callbackHelper, this, 32, FCD_BLOCKSIZE)) < 0) {
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qCritical("RTLSDRThread: async error: %s", strerror(errno));
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break;
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}
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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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// Len is total samples (i.e. one I and Q pair will have len=2)
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void RTLSDRThread::callbackIQ(const quint8* inBuf, qint32 len)
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{
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SampleVector::iterator it = m_convertBuffer.begin();
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// Save data to replay buffer
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m_replayBuffer->lock();
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bool replayEnabled = m_replayBuffer->getSize() > 0;
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if (replayEnabled) {
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m_replayBuffer->write(inBuf, len);
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}
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const quint8* buf = inBuf;
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qint32 remaining = len;
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while (remaining > 0)
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{
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// Choose between live data or replayed data
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if (replayEnabled && m_replayBuffer->useReplay()) {
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len = m_replayBuffer->read(remaining, buf);
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} else {
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len = remaining;
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}
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remaining -= len;
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if (m_log2Decim == 0)
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{
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m_decimatorsIQ.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) // Infradyne
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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_decimatorsIQ.decimate2_inf(&it, buf, len);
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break;
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case 2:
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m_decimatorsIQ.decimate4_inf(&it, buf, len);
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break;
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case 3:
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m_decimatorsIQ.decimate8_inf(&it, buf, len);
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break;
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case 4:
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m_decimatorsIQ.decimate16_inf(&it, buf, len);
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break;
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case 5:
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m_decimatorsIQ.decimate32_inf(&it, buf, len);
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break;
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case 6:
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m_decimatorsIQ.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) // Supradyne
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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_decimatorsIQ.decimate2_sup(&it, buf, len);
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break;
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case 2:
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m_decimatorsIQ.decimate4_sup(&it, buf, len);
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break;
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case 3:
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m_decimatorsIQ.decimate8_sup(&it, buf, len);
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break;
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case 4:
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m_decimatorsIQ.decimate16_sup(&it, buf, len);
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break;
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case 5:
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m_decimatorsIQ.decimate32_sup(&it, buf, len);
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break;
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case 6:
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m_decimatorsIQ.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 // Centered
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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_decimatorsIQ.decimate2_cen(&it, buf, len);
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break;
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case 2:
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m_decimatorsIQ.decimate4_cen(&it, buf, len);
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break;
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case 3:
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m_decimatorsIQ.decimate8_cen(&it, buf, len);
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break;
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case 4:
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m_decimatorsIQ.decimate16_cen(&it, buf, len);
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break;
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case 5:
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m_decimatorsIQ.decimate32_cen(&it, buf, len);
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break;
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case 6:
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m_decimatorsIQ.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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}
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m_replayBuffer->unlock();
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m_sampleFifo->write(m_convertBuffer.begin(), it);
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if(!m_running)
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rtlsdr_cancel_async(m_dev);
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}
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void RTLSDRThread::callbackQI(const quint8* inBuf, qint32 len)
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{
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SampleVector::iterator it = m_convertBuffer.begin();
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// Save data to replay buffer
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m_replayBuffer->lock();
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bool replayEnabled = m_replayBuffer->getSize() > 0;
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if (replayEnabled) {
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m_replayBuffer->write(inBuf, len);
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}
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const quint8* buf = inBuf;
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qint32 remaining = len;
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while (remaining > 0)
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{
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// Choose between live data or replayed data
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if (replayEnabled && m_replayBuffer->useReplay()) {
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len = m_replayBuffer->read(remaining, buf);
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} else {
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len = remaining;
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}
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remaining -= len;
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if (m_log2Decim == 0)
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{
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m_decimatorsQI.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) // Infradyne
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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_decimatorsQI.decimate2_inf(&it, buf, len);
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break;
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case 2:
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m_decimatorsQI.decimate4_inf(&it, buf, len);
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break;
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case 3:
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m_decimatorsQI.decimate8_inf(&it, buf, len);
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break;
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case 4:
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m_decimatorsQI.decimate16_inf(&it, buf, len);
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break;
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case 5:
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m_decimatorsQI.decimate32_inf(&it, buf, len);
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break;
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case 6:
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m_decimatorsQI.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) // Supradyne
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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_decimatorsQI.decimate2_sup(&it, buf, len);
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break;
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case 2:
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m_decimatorsQI.decimate4_sup(&it, buf, len);
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break;
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case 3:
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m_decimatorsQI.decimate8_sup(&it, buf, len);
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break;
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case 4:
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m_decimatorsQI.decimate16_sup(&it, buf, len);
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break;
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case 5:
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m_decimatorsQI.decimate32_sup(&it, buf, len);
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break;
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case 6:
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m_decimatorsQI.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 // Centered
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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_decimatorsQI.decimate2_cen(&it, buf, len);
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break;
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case 2:
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m_decimatorsQI.decimate4_cen(&it, buf, len);
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break;
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case 3:
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m_decimatorsQI.decimate8_cen(&it, buf, len);
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break;
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case 4:
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m_decimatorsQI.decimate16_cen(&it, buf, len);
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break;
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case 5:
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m_decimatorsQI.decimate32_cen(&it, buf, len);
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break;
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case 6:
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m_decimatorsQI.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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}
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m_replayBuffer->unlock();
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m_sampleFifo->write(m_convertBuffer.begin(), it);
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if(!m_running)
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rtlsdr_cancel_async(m_dev);
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}
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void RTLSDRThread::callbackHelper(unsigned char* buf, uint32_t len, void* ctx)
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{
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RTLSDRThread* thread = (RTLSDRThread*) ctx;
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if (thread->m_iqOrder) {
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thread->callbackIQ(buf, len);
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} else {
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thread->callbackQI(buf, len);
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}
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}
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