Qt AudioSource not recording

While I have plenty of experience in C++, I am a novice regarding the Qt framework. What I want to do is to record some audio in a console application.

  QBuffer buffer;
  buffer.open(QBuffer::ReadWrite);

  QAudioFormat format;
  format.setSampleRate(8000);
  format.setChannelCount(1);
  format.setSampleFormat(QAudioFormat::UInt8);

  QAudioDevice info = QMediaDevices::defaultAudioInput();
  if(!info.isFormatSupported(format))
    {
      std::cout << "Default format not supported";
    }

  QAudioSource source(format);
  assert(source.state() == QAudio::StoppedState);

  source.setVolume(1);
  source.start(&buffer);

  if(source.error() or source.state() != QAudio::ActiveState)
    {
      std::cout << "An error has occured while recording audio" << std::endl;
      return;
    }

  hasInitialisedAudio = true;

  do
    {
      sleep(10)

      source.stop();
      buffer.seek(0);
      std::cout << "Recorded a buffer of size " << buffer.size() << " during " << source.processedUSecs() << " second." << std::endl;
      double RMS = calculateRMS(buffer.data().constData(), buffer.size());
    }
  while(true);

However, this gives me a buffer.size() of 0 and a source.processedUSecs() of 0, can anyone help me with this?

>Solution :

You need to pump the message loop. You would need to create a QApplication and call exec on it. This would block your thread endlessly (your while loop). From there on you would rather program with signal slots (events).