sdrangel/plugins/samplesource/rtlsdr/rtlsdrthread.cpp

296 wiersze
7.0 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// //
// 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 <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include <stdio.h>
#include <errno.h>
#include "rtlsdrthread.h"
#include "dsp/samplesinkfifo.h"
#define FCD_BLOCKSIZE 16384
RTLSDRThread::RTLSDRThread(rtlsdr_dev_t* dev, SampleSinkFifo* sampleFifo, QObject* parent) :
QThread(parent),
m_running(false),
m_dev(dev),
m_convertBuffer(FCD_BLOCKSIZE),
m_sampleFifo(sampleFifo),
m_samplerate(288000),
m_log2Decim(4),
m_fcPos(0),
m_iqOrder(true)
{
}
RTLSDRThread::~RTLSDRThread()
{
stopWork();
}
void RTLSDRThread::startWork()
{
m_startWaitMutex.lock();
start();
while(!m_running)
m_startWaiter.wait(&m_startWaitMutex, 100);
m_startWaitMutex.unlock();
}
void RTLSDRThread::stopWork()
{
m_running = false;
wait();
}
void RTLSDRThread::setSamplerate(int samplerate)
{
m_samplerate = samplerate;
}
void RTLSDRThread::setLog2Decimation(unsigned int log2_decim)
{
m_log2Decim = log2_decim;
}
void RTLSDRThread::setFcPos(int fcPos)
{
m_fcPos = fcPos;
}
void RTLSDRThread::run()
{
int res;
m_running = true;
m_startWaiter.wakeAll();
while(m_running) {
if((res = rtlsdr_read_async(m_dev, &RTLSDRThread::callbackHelper, this, 32, FCD_BLOCKSIZE)) < 0) {
qCritical("RTLSDRThread: async error: %s", strerror(errno));
break;
}
}
m_running = false;
}
// Decimate according to specified log2 (ex: log2=4 => decim=16)
void RTLSDRThread::callbackIQ(const quint8* buf, qint32 len)
{
SampleVector::iterator it = m_convertBuffer.begin();
if (m_log2Decim == 0)
{
m_decimatorsIQ.decimate1(&it, buf, len);
}
else
{
if (m_fcPos == 0) // Infradyne
{
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) // Supradyne
{
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 // Centered
{
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);
if(!m_running)
rtlsdr_cancel_async(m_dev);
}
void RTLSDRThread::callbackQI(const quint8* buf, qint32 len)
{
SampleVector::iterator it = m_convertBuffer.begin();
if (m_log2Decim == 0)
{
m_decimatorsQI.decimate1(&it, buf, len);
}
else
{
if (m_fcPos == 0) // Infradyne
{
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) // Supradyne
{
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 // Centered
{
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);
if(!m_running)
rtlsdr_cancel_async(m_dev);
}
void RTLSDRThread::callbackHelper(unsigned char* buf, uint32_t len, void* ctx)
{
RTLSDRThread* thread = (RTLSDRThread*) ctx;
if (thread->m_iqOrder) {
thread->callbackIQ(buf, len);
} else {
thread->callbackQI(buf, len);
}
}