Type Definition fermium::audio::SDL_AudioCallback

pub type SDL_AudioCallback = Option<unsafe extern "C" fn(userdata: *mut c_void, stream: *mut u8, len: c_int)>;

This function is called when the audio device needs more data.

• userdata An application-specific parameter saved in the SDL_AudioSpec structure
• stream A pointer to the audio data buffer.
• len The length of that buffer in bytes.

The buffer is uninitialized when the callback is called.

The callback must initialize the entire buffer.

Once the callback returns, the buffer will no longer be valid.

See SDL_AudioSpec for default sample ordering.

You can choose to avoid callbacks and use SDL_QueueAudio() instead, if you like. Just open your audio device with a NULL callback.