Function gst::ffi::gst_event_parse_qos

pub unsafe extern "C" fn gst_event_parse_qos(
    event: *mut GstEvent, 
    _type: *mut GstQOSType, 
    proportion: *mut gdouble, 
    diff: *mut GstClockTimeDiff, 
    timestamp: *mut GstClockTime
)