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sdrangel/plugins/samplesink/remoteoutput/remoteoutputthread.cpp

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///////////////////////////////////////////////////////////////////////////////////
// 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 //
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// (at your option) any later version. //
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// //
// 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 <assert.h>
#include <algorithm>
#include <QDebug>
#include "dsp/samplesourcefifo.h"
#include "util/timeutil.h"
#include "remoteoutputthread.h"
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RemoteOutputThread::RemoteOutputThread(SampleSourceFifo* sampleFifo, QObject* parent) :
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QThread(parent),
m_running(false),
m_samplesChunkSize(0),
m_sampleFifo(sampleFifo),
m_samplesCount(0),
m_chunkCorrection(0),
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m_samplerate(0),
m_throttlems(REMOTEOUTPUT_THROTTLE_MS),
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m_maxThrottlems(50),
m_throttleToggle(false)
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{
}
RemoteOutputThread::~RemoteOutputThread()
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{
if (m_running) {
stopWork();
}
}
void RemoteOutputThread::startWork()
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{
qDebug() << "RemoteOutputThread::startWork: ";
m_udpSinkFEC.start();
m_maxThrottlems = 0;
m_startWaitMutex.lock();
m_elapsedTimer.start();
start();
while(!m_running)
m_startWaiter.wait(&m_startWaitMutex, 100);
m_startWaitMutex.unlock();
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}
void RemoteOutputThread::stopWork()
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{
qDebug() << "RemoteOutputThread::stopWork";
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m_running = false;
wait();
m_udpSinkFEC.stop();
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}
void RemoteOutputThread::setSamplerate(int samplerate)
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{
if (samplerate != m_samplerate)
{
qDebug() << "RemoteOutputThread::setSamplerate:"
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<< " new:" << samplerate
<< " old:" << m_samplerate;
bool wasRunning = false;
if (m_running)
{
stopWork();
wasRunning = true;
}
// resize sample FIFO
if (m_sampleFifo) {
m_sampleFifo->resize(samplerate); // 1s buffer
}
m_samplerate = samplerate;
m_samplesChunkSize = (m_samplerate * m_throttlems) / 1000;
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m_udpSinkFEC.setSampleRate(m_samplerate);
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if (wasRunning) {
startWork();
}
}
}
void RemoteOutputThread::run()
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{
m_running = true;
m_startWaiter.wakeAll();
while(m_running) // actual work is in the tick() function
{
sleep(1);
}
m_running = false;
}
void RemoteOutputThread::connectTimer(const QTimer& timer)
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{
qDebug() << "RemoteOutputThread::connectTimer";
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connect(&timer, SIGNAL(timeout()), this, SLOT(tick()));
}
void RemoteOutputThread::tick()
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{
if (m_running)
{
qint64 throttlems = m_elapsedTimer.restart();
if (throttlems != m_throttlems)
{
m_throttlems = throttlems;
m_samplesChunkSize = (m_samplerate * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000;
m_samplesChunkSize = m_samplesChunkSize + m_chunkCorrection > 0 ? m_samplesChunkSize + m_chunkCorrection : m_samplesChunkSize;
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m_throttleToggle = !m_throttleToggle;
}
SampleVector::iterator readUntil;
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m_sampleFifo->readAdvance(readUntil, m_samplesChunkSize); // pull samples
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SampleVector::iterator beginRead = readUntil - m_samplesChunkSize;
m_samplesCount += m_samplesChunkSize;
m_udpSinkFEC.write(beginRead, m_samplesChunkSize);
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}
}
uint32_t RemoteOutputThread::getSamplesCount(uint64_t& ts_usecs) const
{
ts_usecs = TimeUtil::nowus();
return m_samplesCount;
}