c++ - 调用 QSound 调用，它们之间有延迟 Qt C++

Question

嘿，我正在构建一个小游戏，我正在通过制作一个数字 vector 来创建关卡，该数字 vector 通过枚举与 1-4 种颜色相关联。问题是循环(在 Simon::loadChallenge 中)我将颜色代码添加到 vector 中，除了调用 playSound(调用 QSound::play ).在 Simon::startGame() 完成之前不会播放任何声音，然后您会同时听到所有声音。

auto Simon::playSound(Simon::Color color) -> void {
  if (color == Simon::Color::green) {
    QSound::play(":/sounds/green.wav");
  } else if (color == Simon::Color::red) {
    QSound::play(":/sounds/red.wav");
  } else if (color == Simon::Color::blue) {
    QSound::play(":/sounds/blue.wav");
  } else if (color == Simon::Color::yellow) {
    QSound::play(":/sounds/yellow.wav");
  }
}

auto Simon::loadChallenge() -> void {
  challengeVect.clear();    <- Clears previous level 
  for (auto i = 0; i < Simon::level; ++i) {
    auto currentVal = static_cast<int>(std::rand() % 4);
    qDebug() << currentVal;
    playSound(Simon::Color(currentVal)); <- Calls method above and is meant to play the sound(doesn't)
    challengeVect.push_back(currentVal);
    std::this_thread::sleep_for(std::chrono::milliseconds(50)); <- delay which works
  }
}

auto Simon::startGame() -> void {
  auto i = 10;
  while (i >= 0) { <- If you replace this with while(true) it will run infinitely without playing a sound
    loadChallenge(); <- Where loadChallenge is called from
    --i;
  }

如果您想要更广泛的了解，如果这不够上下文，代码在这里 ( https://github.com/ItsChoudhry/SimonSaysQt)，我深表歉意。

谢谢你看我的问题:D

Answer 1

感谢@RemyLebeau 为我指明了正确的方向。

在正确研究 QSoundEffect 时，我发现 QEventLoop 结合了它们的力量，我有声音和延迟，一切都在生成水平方面起作用。这些是我所做的更改。

  // Add this stuff to my constructor
  m_soundEffect = std::make_unique<QSoundEffect>();
  m_soundEffect->setLoopCount(1); <- must set loop count
  m_eventLoop = std::make_unique<QEventLoop>(); <- event loop needed to hear sound
  connect(m_soundEffect.get(), SIGNAL(playingChanged()), m_eventLoop.get(),
          SLOT(quit())); <- needed to stop the event loop after sound is played or program locks up on m_eventLoop .exec()

//Updated playSound method
auto Simon::playSound(Simon::Color color) -> void {
  if (color == Simon::Color::green) {
    m_soundEffect->setSource(QUrl::fromLocalFile(":/sounds/green.wav"));
    m_soundEffect->play();
    m_eventLoop->exec();
  } else if (color == Simon::Color::red) {
    m_soundEffect->setSource(QUrl::fromLocalFile(":/sounds/red.wav"));
    m_soundEffect->play();
    m_eventLoop->exec();
  } else if (color == Simon::Color::blue) {
    m_soundEffect->setSource(QUrl::fromLocalFile(":/sounds/blue.wav"));
    m_soundEffect->play();
    m_eventLoop->exec();
  } else if (color == Simon::Color::yellow) {
    m_soundEffect->setSource(QUrl::fromLocalFile(":/sounds/yellow.wav"));
    m_soundEffect->play();
    m_eventLoop->exec();
  }
}