95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
#include "../headers/scstwstartsoundplayer.h"
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ScStwStartSoundPlayer::ScStwStartSoundPlayer(QObject *parent) : QObject(parent)
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{
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this->waitLoop = new QEventLoop();
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this->startSoundFile = new QFile(":/sound/StartsignalSound.wav", this);
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if(!this->startSoundFile->open(QFile::ReadOnly)) {
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qWarning() << "Cannot open audio File!!";
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return;
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}
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// init sound format
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QAudioFormat format;
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format.setSampleRate(44100);
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format.setChannelCount(2);
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format.setSampleSize(16);
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format.setCodec("audio/pcm");
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format.setByteOrder(QAudioFormat::LittleEndian);
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format.setSampleType(QAudioFormat::SignedInt);
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// check if format is valid
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QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
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if (!info.isFormatSupported(format)) {
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qWarning() << "Raw audio format not supported by backend, cannot play audio.";
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return;
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}
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this->audioOutput = new QAudioOutput(format);
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this->audioOutput->setCategory("ScStw start sound");
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connect(this->audioOutput, SIGNAL(stateChanged(QAudio::State)), this, SLOT(handleStateChanged(QAudio::State)));
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}
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bool ScStwStartSoundPlayer::play(double volume, double *timeOfStop) {
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double st = QDateTime::currentMSecsSinceEpoch();
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// update volume
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this->audioOutput->setVolume(volume);
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// start
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this->audioOutput->start(this->startSoundFile);
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double ed = QDateTime::currentMSecsSinceEpoch();
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qDebug() << "time passed: " << ed-st << " playback elapsed: " << this->audioOutput->elapsedUSecs();
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// wait until the audio output reports the sound is over
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waitLoop->exec();
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qDebug() << "waitLoop exited!! elapsed: " << this->audioOutput->elapsedUSecs() << " processed: " << this->audioOutput->processedUSecs();
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// wait until the sound is actually over
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// the timeOffset is the buffer time before the audio started!
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int timeOffset = ((this->audioOutput->processedUSecs() - this->audioOutput->elapsedUSecs()) / 1000);
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if(timeOffset > 0) {
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QTimer timer;
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timer.singleShot(timeOffset, this->waitLoop, &QEventLoop::quit);
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waitLoop->exec();
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}
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// calculate the point in time where the sound playback actually ended
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if(timeOfStop != nullptr) {
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int latency = (this->audioOutput->processedUSecs() - this->audioOutput->elapsedUSecs()) / 1000;
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*timeOfStop = QDateTime::currentMSecsSinceEpoch() - latency;
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}
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// check for errors and return
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if(this->audioOutput->state() == QAudio::IdleState)
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return true;
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return false;
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}
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void ScStwStartSoundPlayer::handleStateChanged(QAudio::State newState)
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{
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switch (newState) {
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case QAudio::IdleState:
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// Finished playing (no more data)
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qDebug() << "sound reported over!! elapsed: " << this->audioOutput->elapsedUSecs() << " processed: " << this->audioOutput->processedUSecs();
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waitLoop->exit();
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break;
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case QAudio::StoppedState:
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// Stopped for other reasons
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if (this->audioOutput->error() != QAudio::NoError) {
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// Error handling
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}
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break;
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default:
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// ... other cases as appropriate
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break;
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}
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}
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