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sdrangel/plugins/samplesource/airspy/airspythread.cpp

215 lines
5.0 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015 Edouard Griffiths, F4EXB //
// //
// 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 <algorithm>
#include "airspythread.h"
#include "dsp/samplesinkfifo.h"
AirspyThread *AirspyThread::m_this = 0;
AirspyThread::AirspyThread(struct airspy_device* dev, SampleSinkFifo* sampleFifo, QObject* parent) :
QThread(parent),
m_running(false),
m_dev(dev),
m_convertBuffer(AIRSPY_BLOCKSIZE),
m_sampleFifo(sampleFifo),
m_samplerate(10),
m_log2Decim(0),
m_fcPos(0)
{
m_this = this;
std::fill(m_buf, m_buf + 2*AIRSPY_BLOCKSIZE, 0);
}
AirspyThread::~AirspyThread()
{
stopWork();
m_this = 0;
}
void AirspyThread::startWork()
{
m_startWaitMutex.lock();
start();
while(!m_running)
m_startWaiter.wait(&m_startWaitMutex, 100);
m_startWaitMutex.unlock();
}
void AirspyThread::stopWork()
{
qDebug("AirspyThread::stopWork");
m_running = false;
wait();
}
void AirspyThread::setSamplerate(uint32_t samplerate)
{
m_samplerate = samplerate;
}
void AirspyThread::setLog2Decimation(unsigned int log2_decim)
{
m_log2Decim = log2_decim;
}
void AirspyThread::setFcPos(int fcPos)
{
m_fcPos = fcPos;
}
void AirspyThread::run()
{
airspy_error rc;
m_running = true;
m_startWaiter.wakeAll();
rc = (airspy_error) airspy_start_rx(m_dev, rx_callback, NULL);
if (rc != AIRSPY_SUCCESS)
{
qCritical("AirspyThread::run: failed to start Airspy Rx: %s", airspy_error_name(rc));
}
else
{
while ((m_running) && (airspy_is_streaming(m_dev) == AIRSPY_TRUE))
{
sleep(1);
}
}
rc = (airspy_error) airspy_stop_rx(m_dev);
if (rc == AIRSPY_SUCCESS)
{
qDebug("AirspyThread::run: stopped Airspy Rx");
}
else
{
qDebug("AirspyThread::run: failed to stop Airspy Rx: %s", airspy_error_name(rc));
}
m_running = false;
}
// Decimate according to specified log2 (ex: log2=4 => decim=16)
void AirspyThread::callback(const qint16* buf, qint32 len)
{
SampleVector::iterator it = m_convertBuffer.begin();
if (m_log2Decim == 0)
{
m_decimators.decimate1(&it, buf, len);
}
else
{
if (m_fcPos == 0) // Infra
{
switch (m_log2Decim)
{
case 1:
m_decimators.decimate2_inf(&it, buf, len);
break;
case 2:
m_decimators.decimate4_inf(&it, buf, len);
break;
case 3:
m_decimators.decimate8_inf(&it, buf, len);
break;
case 4:
m_decimators.decimate16_inf(&it, buf, len);
break;
case 5:
m_decimators.decimate32_inf(&it, buf, len);
break;
case 6:
m_decimators.decimate64_inf(&it, buf, len);
break;
default:
break;
}
}
else if (m_fcPos == 1) // Supra
{
switch (m_log2Decim)
{
case 1:
m_decimators.decimate2_sup(&it, buf, len);
break;
case 2:
m_decimators.decimate4_sup(&it, buf, len);
break;
case 3:
m_decimators.decimate8_sup(&it, buf, len);
break;
case 4:
m_decimators.decimate16_sup(&it, buf, len);
break;
case 5:
m_decimators.decimate32_sup(&it, buf, len);
break;
case 6:
m_decimators.decimate64_sup(&it, buf, len);
break;
default:
break;
}
}
else if (m_fcPos == 2) // Center
{
switch (m_log2Decim)
{
case 1:
m_decimators.decimate2_cen(&it, buf, len);
break;
case 2:
m_decimators.decimate4_cen(&it, buf, len);
break;
case 3:
m_decimators.decimate8_cen(&it, buf, len);
break;
case 4:
m_decimators.decimate16_cen(&it, buf, len);
break;
case 5:
m_decimators.decimate32_cen(&it, buf, len);
break;
case 6:
m_decimators.decimate64_cen(&it, buf, len);
break;
default:
break;
}
}
}
m_sampleFifo->write(m_convertBuffer.begin(), it);
}
int AirspyThread::rx_callback(airspy_transfer_t* transfer)
{
qint32 bytes_to_write = transfer->sample_count * sizeof(qint16);
m_this->callback((qint16 *) transfer->samples, bytes_to_write);
return 0;
}