mirror of
https://github.com/f4exb/sdrangel.git
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146 lines
3.9 KiB
C++
146 lines
3.9 KiB
C++
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///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2018 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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// (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 <stdio.h>
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#include <errno.h>
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#include "dsp/samplesinkfifo.h"
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#include "airspyhfthread.h"
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AirspyHFThread *AirspyHFThread::m_this = 0;
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AirspyHFThread::AirspyHFThread(airspyhf_device_t* dev, SampleSinkFifo* sampleFifo, 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(AIRSPYHF_BLOCKSIZE),
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m_sampleFifo(sampleFifo),
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m_samplerate(10),
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m_log2Decim(0)
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{
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memset((char*) m_buf, 0, 2*AIRSPYHF_BLOCKSIZE*sizeof(qint16));
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m_this = this;
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}
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AirspyHFThread::~AirspyHFThread()
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{
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stopWork();
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m_this = 0;
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}
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void AirspyHFThread::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 AirspyHFThread::stopWork()
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{
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qDebug("AirspyThread::stopWork");
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m_running = false;
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wait();
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}
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void AirspyHFThread::setSamplerate(uint32_t samplerate)
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{
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m_samplerate = samplerate;
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}
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void AirspyHFThread::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 AirspyHFThread::run()
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{
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airspyhf_error rc;
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m_running = true;
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m_startWaiter.wakeAll();
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rc = (airspyhf_error) airspyhf_start(m_dev, rx_callback, 0);
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if (rc != AIRSPYHF_SUCCESS)
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{
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qCritical("AirspyHFFThread::run: failed to start Airspy HF Rx");
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}
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else
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{
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while ((m_running) && (airspyhf_is_streaming(m_dev) != 0))
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{
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sleep(1);
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}
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}
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rc = (airspyhf_error) airspyhf_stop(m_dev);
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if (rc == AIRSPYHF_SUCCESS) {
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qDebug("AirspyHFFThread::run: stopped Airspy HF Rx");
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} else {
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qDebug("AirspyHFFThread::run: failed to stop Airspy HF Rx");
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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 AirspyHFThread::callback(const float* buf, qint32 len)
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{
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SampleVector::iterator it = m_convertBuffer.begin();
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switch (m_log2Decim)
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{
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case 0:
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m_decimators.decimate1(&it, buf, len);
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break;
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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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m_sampleFifo->write(m_convertBuffer.begin(), it);
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}
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int AirspyHFThread::rx_callback(airspyhf_transfer_t* transfer)
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{
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qint32 nbIAndQ = transfer->sample_count * 2;
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m_this->callback((float *) transfer->samples, nbIAndQ);
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return 0;
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}
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