AudioSpec lifetimes

gistfile1.rs

extern crate sdl2;

pub fn main() {
    sdl2::init(sdl2::InitVideo);
    sdl2::init(sdl2::InitAudio);

    let window = match sdl2::video::Window::new("rust-sdl2 demo: Video", sdl2::video::PosCentered, sdl2::video::PosCentered, 800, 600, sdl2::video::OpenGL) {
        Ok(window) => window,
        Err(err) => fail!(format!("failed to create window: {}", err))
    };

    let renderer = match sdl2::render::Renderer::from_window(window, sdl2::render::DriverAuto, sdl2::render::Accelerated) {
        Ok(renderer) => renderer,
        Err(err) => fail!(format!("failed to create renderer: {}", err))
    };

    let path = std::os::self_exe_path().unwrap().join("Noise.wav");

    let audio_cb = |data: &mut [u8]| { println!("Audio callback. Buf len: {}", data.len()) };

    let mut audio_spec = match sdl2::audio::AudioSpec::load_wav(&path) {
        Ok((spec, _)) => {
            spec
        },
        Err(e) => fail!("Failed to load wav: {}", e)
    };

    audio_spec.callback = Some(&audio_cb);

    let device = match sdl2::audio::AudioDevice::open(None, 0, &audio_spec) {
        Ok((d, _)) => {
            d
        },
        Err(e) => fail!("Failed to open audio device: {}", e)
    };

    device.resume();
    sdl2::timer::delay(3000);
    device.close();

    let _ = renderer.set_draw_color(sdl2::pixels::RGB(255, 0, 0));
    let _ = renderer.clear();
    renderer.present();

    'main : loop {
        'event : loop {
            match sdl2::event::poll_event() {
                sdl2::event::QuitEvent(_) => break 'main,
                sdl2::event::KeyDownEvent(_, _, key, _, _) => {
                    if key == sdl2::keycode::EscapeKey {
                        break 'main
                    }
                },
                sdl2::event::NoEvent => break 'event,
                _ => {}
            }
        }
    }

    sdl2::quit();
}