mirror of
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112 lines
2.6 KiB
C++
112 lines
2.6 KiB
C++
#include <QThread>
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#include "dsp/threadedsamplesink.h"
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#include "util/message.h"
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ThreadedSampleSink::ThreadedSampleSink(SampleSink* sampleSink) :
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m_thread(new QThread),
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m_sampleSink(sampleSink)
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{
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moveToThread(m_thread);
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connect(m_thread, SIGNAL(started()), this, SLOT(threadStarted()));
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connect(m_thread, SIGNAL(finished()), this, SLOT(threadFinished()));
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m_messageQueue.moveToThread(m_thread);
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connect(&m_messageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleMessages()));
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m_sampleFifo.moveToThread(m_thread);
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connect(&m_sampleFifo, SIGNAL(dataReady()), this, SLOT(handleData()));
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m_sampleFifo.setSize(262144);
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sampleSink->moveToThread(m_thread);
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}
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ThreadedSampleSink::~ThreadedSampleSink()
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{
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m_thread->exit();
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m_thread->wait();
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delete m_thread;
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}
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void ThreadedSampleSink::feed(SampleVector::const_iterator begin, SampleVector::const_iterator end, bool firstOfBurst)
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{
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Q_UNUSED(firstOfBurst);
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m_sampleFifo.write(begin, end);
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}
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void ThreadedSampleSink::start()
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{
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m_thread->start();
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}
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void ThreadedSampleSink::stop()
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{
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m_thread->exit();
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m_thread->wait();
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m_sampleFifo.readCommit(m_sampleFifo.fill());
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}
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bool ThreadedSampleSink::handleMessage(Message* cmd)
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{
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// called from other thread
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m_messageQueue.submit(cmd);
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return true;
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}
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void ThreadedSampleSink::handleData()
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{
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bool firstOfBurst = true;
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while((m_sampleFifo.fill() > 0) && (m_messageQueue.countPending() == 0)) {
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SampleVector::iterator part1begin;
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SampleVector::iterator part1end;
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SampleVector::iterator part2begin;
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SampleVector::iterator part2end;
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size_t count = m_sampleFifo.readBegin(m_sampleFifo.fill(), &part1begin, &part1end, &part2begin, &part2end);
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// first part of FIFO data
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if(part1begin != part1end) {
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// handle data
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if(m_sampleSink != NULL)
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m_sampleSink->feed(part1begin, part1end, firstOfBurst);
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firstOfBurst = false;
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}
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// second part of FIFO data (used when block wraps around)
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if(part2begin != part2end) {
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// handle data
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if(m_sampleSink != NULL)
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m_sampleSink->feed(part1begin, part1end, firstOfBurst);
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firstOfBurst = false;
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}
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// adjust FIFO pointers
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m_sampleFifo.readCommit(count);
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}
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}
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void ThreadedSampleSink::handleMessages()
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{
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Message* message;
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while((message = m_messageQueue.accept()) != NULL) {
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qDebug("CMD: %s", message->getIdentifier());
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if(m_sampleSink != NULL) {
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if(!m_sampleSink->handleMessage(message))
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message->completed();
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} else {
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message->completed();
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}
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}
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}
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void ThreadedSampleSink::threadStarted()
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{
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if(m_sampleSink != NULL)
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m_sampleSink->start();
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}
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void ThreadedSampleSink::threadFinished()
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{
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if(m_sampleSink != NULL)
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m_sampleSink->stop();
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}
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