mirror of https://github.com/f4exb/sdrangel.git
148 lines
4.2 KiB
C++
148 lines
4.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017 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 <assert.h>
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#include <algorithm>
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#include <QDebug>
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#include "dsp/samplesourcefifo.h"
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#include "util/timeutil.h"
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#include "remoteoutputthread.h"
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RemoteOutputThread::RemoteOutputThread(SampleSourceFifo* sampleFifo, QObject* parent) :
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QThread(parent),
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m_running(false),
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m_samplesChunkSize(0),
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m_sampleFifo(sampleFifo),
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m_samplesCount(0),
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m_chunkCorrection(0),
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m_samplerate(0),
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m_throttlems(REMOTEOUTPUT_THROTTLE_MS),
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m_maxThrottlems(50),
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m_throttleToggle(false)
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{
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}
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RemoteOutputThread::~RemoteOutputThread()
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{
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if (m_running) {
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stopWork();
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}
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}
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void RemoteOutputThread::startWork()
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{
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qDebug() << "RemoteOutputThread::startWork: ";
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m_udpSinkFEC.start();
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m_maxThrottlems = 0;
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m_startWaitMutex.lock();
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m_elapsedTimer.start();
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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 RemoteOutputThread::stopWork()
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{
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qDebug() << "RemoteOutputThread::stopWork";
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m_running = false;
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wait();
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m_udpSinkFEC.stop();
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}
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void RemoteOutputThread::setSamplerate(int samplerate)
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{
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if (samplerate != m_samplerate)
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{
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qDebug() << "RemoteOutputThread::setSamplerate:"
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<< " new:" << samplerate
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<< " old:" << m_samplerate;
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bool wasRunning = false;
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if (m_running)
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{
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stopWork();
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wasRunning = true;
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}
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// resize sample FIFO
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if (m_sampleFifo) {
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m_sampleFifo->resize(samplerate); // 1s buffer
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}
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m_samplerate = samplerate;
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m_samplesChunkSize = (m_samplerate * m_throttlems) / 1000;
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m_udpSinkFEC.setSampleRate(m_samplerate);
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if (wasRunning) {
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startWork();
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}
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}
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}
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void RemoteOutputThread::run()
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{
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m_running = true;
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m_startWaiter.wakeAll();
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while(m_running) // actual work is in the tick() function
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{
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sleep(1);
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}
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m_running = false;
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}
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void RemoteOutputThread::connectTimer(const QTimer& timer)
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{
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qDebug() << "RemoteOutputThread::connectTimer";
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connect(&timer, SIGNAL(timeout()), this, SLOT(tick()));
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}
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void RemoteOutputThread::tick()
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{
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if (m_running)
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{
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qint64 throttlems = m_elapsedTimer.restart();
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if (throttlems != m_throttlems)
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{
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m_throttlems = throttlems;
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m_samplesChunkSize = (m_samplerate * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000;
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m_samplesChunkSize = m_samplesChunkSize + m_chunkCorrection > 0 ? m_samplesChunkSize + m_chunkCorrection : m_samplesChunkSize;
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m_throttleToggle = !m_throttleToggle;
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}
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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;
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m_samplesCount += m_samplesChunkSize;
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m_udpSinkFEC.write(beginRead, m_samplesChunkSize);
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}
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}
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uint32_t RemoteOutputThread::getSamplesCount(uint64_t& ts_usecs) const
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{
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ts_usecs = TimeUtil::nowus();
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return m_samplesCount;
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}
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