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sdrangel/plugins/samplesink/usrpoutput/usrpoutputthread.cpp

197 lines
6.1 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2017-2020 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
// Copyright (C) 2020 Jon Beniston, M7RCE <jon@beniston.com> //
// //
// 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 <errno.h>
#include <algorithm>
#include <QDebug>
#include "dsp/samplesourcefifo.h"
#include "usrpoutputthread.h"
#include "usrpoutputsettings.h"
USRPOutputThread::USRPOutputThread(uhd::tx_streamer::sptr stream, size_t bufSamples, SampleSourceFifo* sampleFifo, QObject* parent) :
QThread(parent),
m_running(false),
m_stream(stream),
m_bufSamples(bufSamples),
m_sampleFifo(sampleFifo),
m_log2Interp(0)
{
// *2 as samples are I+Q
m_buf = new qint16[2*bufSamples];
std::fill(m_buf, m_buf + 2*bufSamples, 0);
}
USRPOutputThread::~USRPOutputThread()
{
stopWork();
delete m_buf;
}
void USRPOutputThread::startWork()
{
if (m_running) return; // return if running already
// Reset stats
m_packets = 0;
m_underflows = 0;
m_droppedPackets = 0;
m_startWaitMutex.lock();
start();
while(!m_running)
m_startWaiter.wait(&m_startWaitMutex, 100);
m_startWaitMutex.unlock();
}
void USRPOutputThread::stopWork()
{
uhd::async_metadata_t md;
if (!m_running) return; // return if not running
m_running = false;
wait();
try
{
// Get message indicating underflow, so it doesn't appear if we restart
m_stream->recv_async_msg(md);
}
catch (std::exception& e)
{
qDebug() << "USRPOutputThread::stopWork: exception: " << e.what();
}
qDebug("USRPOutputThread::stopWork: stream stopped");
}
void USRPOutputThread::setLog2Interpolation(unsigned int log2_interp)
{
m_log2Interp = log2_interp;
}
void USRPOutputThread::run()
{
uhd::tx_metadata_t md;
md.start_of_burst = false;
md.end_of_burst = false;
m_running = true;
m_startWaiter.wakeAll();
qDebug("USRPOutputThread::run");
while (m_running)
{
callback(m_buf, m_bufSamples);
try
{
const size_t samples_sent = m_stream->send(m_buf, m_bufSamples, md);
m_packets++;
if (samples_sent != m_bufSamples)
{
qDebug("USRPOutputThread::run written %ld/%ld samples", samples_sent, m_bufSamples);
}
}
catch (std::exception& e)
{
qDebug() << "USRPOutputThread::run: exception: " << e.what();
}
}
m_running = false;
}
// Interpolate according to specified log2 (ex: log2=4 => decim=16)
void USRPOutputThread::callback(qint16* buf, qint32 len)
{
SampleVector& data = m_sampleFifo->getData();
unsigned int iPart1Begin, iPart1End, iPart2Begin, iPart2End;
m_sampleFifo->read(len/(1<<m_log2Interp), iPart1Begin, iPart1End, iPart2Begin, iPart2End);
if (iPart1Begin != iPart1End) {
callbackPart(buf, data, iPart1Begin, iPart1End);
}
unsigned int shift = (iPart1End - iPart1Begin)*(1<<m_log2Interp);
if (iPart2Begin != iPart2End) {
callbackPart(buf + 2*shift, data, iPart2Begin, iPart2End);
}
}
void USRPOutputThread::callbackPart(qint16* buf, SampleVector& data, unsigned int iBegin, unsigned int iEnd)
{
SampleVector::iterator beginRead = data.begin() + iBegin;
int len = 2*(iEnd - iBegin)*(1<<m_log2Interp);
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;
}
}
}
void USRPOutputThread::getStreamStatus(bool& active, quint32& underflows, quint32& droppedPackets)
{
uhd::async_metadata_t md;
if (m_stream->recv_async_msg(md))
{
if ((md.event_code == uhd::async_metadata_t::event_code_t::EVENT_CODE_UNDERFLOW)
|| (md.event_code == uhd::async_metadata_t::event_code_t::EVENT_CODE_UNDERFLOW_IN_PACKET))
m_underflows++;
if ((md.event_code == uhd::async_metadata_t::event_code_t::EVENT_CODE_SEQ_ERROR)
|| (md.event_code == uhd::async_metadata_t::event_code_t::EVENT_CODE_SEQ_ERROR_IN_BURST))
m_droppedPackets++;
}
//qDebug() << "USRPOutputThread::getStreamStatus " << m_packets << " " << m_underflows << " " << m_droppedPackets;
active = m_packets > 0;
underflows = m_underflows;
droppedPackets = m_droppedPackets;
}