Function sdl2_sys::SDL_MixAudioFormat

pub unsafe extern "C" fn SDL_MixAudioFormat(
    dst: *mut Uint8, 
    src: *const Uint8, 
    format: SDL_AudioFormat, 
    len: Uint32, 
    volume: c_int
)

This works like SDL_MixAudio(), but you specify the audio format instead of using the format of audio device 1. Thus it can be used when no audio device is open at all.