Function gstreamer_sys::gst_meta_register_custom

pub unsafe extern "C" fn gst_meta_register_custom(
    name: *const c_char,
    tags: *mut *const c_char,
    transform_func: GstCustomMetaTransformFunction,
    user_data: gpointer,
    destroy_data: GDestroyNotify
) -> *const GstMetaInfo