mirror of
https://github.com/f4exb/sdrangel.git
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214 lines
4.9 KiB
C++
214 lines
4.9 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2015 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 <stdio.h>
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#include <errno.h>
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#include <algorithm>
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#include "airspythread.h"
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#include "dsp/samplesinkfifo.h"
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AirspyThread *AirspyThread::m_this = 0;
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AirspyThread::AirspyThread(struct airspy_device* 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(AIRSPY_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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m_fcPos(0)
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{
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m_this = this;
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std::fill(m_buf, m_buf + 2*AIRSPY_BLOCKSIZE, 0);
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}
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AirspyThread::~AirspyThread()
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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 AirspyThread::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 AirspyThread::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 AirspyThread::setSamplerate(uint32_t samplerate)
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{
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m_samplerate = samplerate;
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}
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void AirspyThread::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 AirspyThread::setFcPos(int fcPos)
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{
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m_fcPos = fcPos;
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}
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void AirspyThread::run()
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{
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airspy_error rc;
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m_running = true;
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m_startWaiter.wakeAll();
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rc = (airspy_error) airspy_start_rx(m_dev, rx_callback, NULL);
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if (rc != AIRSPY_SUCCESS)
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{
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qCritical("AirspyThread::run: failed to start Airspy Rx: %s", airspy_error_name(rc));
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}
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else
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{
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while ((m_running) && (airspy_is_streaming(m_dev) == AIRSPY_TRUE))
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{
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sleep(1);
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}
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}
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rc = (airspy_error) airspy_stop_rx(m_dev);
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if (rc == AIRSPY_SUCCESS)
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{
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qDebug("AirspyThread::run: stopped Airspy Rx");
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}
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else
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{
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qDebug("AirspyThread::run: failed to stop Airspy Rx: %s", airspy_error_name(rc));
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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 AirspyThread::callback(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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int AirspyThread::rx_callback(airspy_transfer_t* transfer)
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{
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qint32 bytes_to_write = transfer->sample_count * sizeof(qint16);
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m_this->callback((qint16 *) transfer->samples, bytes_to_write);
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return 0;
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}
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