Function module_audio_init 

pub unsafe extern "C" fn module_audio_init(
    status_info: *mut *mut c_char,
) -> c_int

Initialize audio

Your module implementation must export it’s own version of this function, unless your build system builds and links with its own version of module-utils.c from the speech-dispatcher distribution.

Note that this function is only required when using client audio playback. Implementations relying on server playback being available may stub this.

#[unsafe(no_mangle)]
unsafe extern "C" fn module_audio_init(status_info: *mut *mut raw::c_char) -> raw::c_int {
    // Stub implementation
    let resp = c"This speech-dispatcher module was compiled without client audio support";
    unsafe {
        let ptr = libc::malloc(size_of_val(resp));
        assert!(ptr != ptr::null_mut());
        libc::memcpy(ptr, resp.as_ptr(), size_of_val(resp));
        *status_info = ptr;
    }

    -1
}