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Audio / I'm missing something fundamental RE threads and audio

« on: June 13, 2009, 06:31:10 pm »

Hi,

I'm developing an audio sample manager and am prototyping it with wxWidgets and SFML. I am having trouble with sf::Thread...well...threading. I am spankin' new to SFML and have read as much as I can on this subject, and I am probably misunderstanding something fundamental.

I am using wxWidgets for the UI (the main thread) and am trying to spawn a thread to play a sound. For example, inside my wxFrame...

Code: [Select]


// Event handler for a wxListCtrl selection event...
void MainFrame::OnFileListItemSelected( wxListEvent& WXUNUSED(event) )
{
       std::string filename = this->wx2std(this->GetSelectedFile());
sf::Thread Thread(&ThreadFunction, &filename);
Thread.Launch();
}

void ThreadFunction(void* UserData)
{
std::string* str = (std::string*)UserData;

sf::SoundBuffer Buffer;

if (!Buffer.LoadFromFile(*str)) return;

sf::Sound Sound;
Sound.SetBuffer(Buffer); // Buffer is a sf::SoundBuffer
Sound.SetVolume(100.f);
Sound.Play();

while(Sound.GetStatus() == sf::Sound::Playing) {
sf::Sleep(0.1f);
}
}

While this actually plays the audio as I expected, my UI is blocked until the Sound has finished playing. Any feedback is appreciated. I'm looking at a lot of different libraries and want to have a decent understanding of SFML before proceeding in my evaluation.

Also, I don't know why I need the last while loop in order for the Sound to play. I expected to be able to just call Sound.Play and have the entire sound play.

Cheers! And, very nice work. I love the API design.