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sdrangel/plugins/samplesink/hackrfoutput/hackrfoutputthread.cpp

162 lines
4.5 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2017 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 //
// //
// 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 "hackrfoutputthread.h"
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include "dsp/samplesourcefifo.h"
HackRFOutputThread::HackRFOutputThread(hackrf_device* dev, SampleSourceFifo* sampleFifo, QObject* parent) :
QThread(parent),
m_running(false),
m_dev(dev),
m_sampleFifo(sampleFifo),
m_samplerate(10),
m_log2Interp(0)
{
}
HackRFOutputThread::~HackRFOutputThread()
{
stopWork();
}
void HackRFOutputThread::startWork()
{
m_startWaitMutex.lock();
start();
while(!m_running)
m_startWaiter.wait(&m_startWaitMutex, 100);
m_startWaitMutex.unlock();
}
void HackRFOutputThread::stopWork()
{
qDebug("HackRFOutputThread::stopWork");
m_running = false;
wait();
}
void HackRFOutputThread::setSamplerate(uint32_t samplerate)
{
m_samplerate = samplerate;
}
void HackRFOutputThread::setLog2Interpolation(unsigned int log2Interp)
{
m_log2Interp = log2Interp;
}
void HackRFOutputThread::run()
{
hackrf_error rc;
m_running = true;
m_startWaiter.wakeAll();
if (hackrf_is_streaming(m_dev) == HACKRF_TRUE)
{
qDebug("HackRFInputThread::run: HackRF is streaming already");
}
else
{
qDebug("HackRFInputThread::run: HackRF is not streaming");
rc = (hackrf_error) hackrf_start_tx(m_dev, tx_callback, this);
if (rc == HACKRF_SUCCESS)
{
qDebug("HackRFOutputThread::run: started HackRF Tx");
}
else
{
qDebug("HackRFOutputThread::run: failed to start HackRF Tx: %s", hackrf_error_name(rc));
}
}
while ((m_running) && (hackrf_is_streaming(m_dev) == HACKRF_TRUE))
{
usleep(200000);
}
if (hackrf_is_streaming(m_dev) == HACKRF_TRUE)
{
rc = (hackrf_error) hackrf_stop_tx(m_dev);
if (rc == HACKRF_SUCCESS)
{
qDebug("HackRFOutputThread::run: stopped HackRF Tx");
}
else
{
qDebug("HackRFOutputThread::run: failed to stop HackRF Tx: %s", hackrf_error_name(rc));
}
}
m_running = false;
}
// Interpolate according to specified log2 (ex: log2=4 => interp=16)
void HackRFOutputThread::callback(qint8* buf, qint32 len)
{
SampleVector::iterator beginRead;
m_sampleFifo->readAdvance(beginRead, len/(2*(1<<m_log2Interp)));
beginRead -= len/2;
if (m_log2Interp == 0)
{
m_interpolators.interpolate1(&beginRead, buf, len);
}
else
{
switch (m_log2Interp)
{
case 1:
m_interpolators.interpolate2_cen(&beginRead, buf, len);
break;
case 2:
m_interpolators.interpolate4_cen(&beginRead, buf, len);
break;
case 3:
m_interpolators.interpolate8_cen(&beginRead, buf, len);
break;
case 4:
m_interpolators.interpolate16_cen(&beginRead, buf, len);
break;
case 5:
m_interpolators.interpolate32_cen(&beginRead, buf, len);
break;
case 6:
m_interpolators.interpolate64_cen(&beginRead, buf, len);
break;
default:
break;
}
}
}
int HackRFOutputThread::tx_callback(hackrf_transfer* transfer)
{
HackRFOutputThread *thread = (HackRFOutputThread *) transfer->tx_ctx;
qint32 bytes_to_write = transfer->valid_length;
thread->callback((qint8 *) transfer->buffer, bytes_to_write);
return 0;
}