Function gstreamer_sys::gst_pad_add_probe

pub unsafe extern "C" fn gst_pad_add_probe(
    pad: *mut GstPad, 
    mask: GstPadProbeType, 
    callback: GstPadProbeCallback, 
    user_data: gpointer, 
    destroy_data: GDestroyNotify
) -> c_ulong