Function gst_base_sink_query_latency 

pub unsafe extern "C" fn gst_base_sink_query_latency(
    sink: *mut GstBaseSink,
    live: *mut gboolean,
    upstream_live: *mut gboolean,
    min_latency: *mut GstClockTime,
    max_latency: *mut GstClockTime,
) -> gboolean