Function gstreamer_video_sys::gst_navigation_event_parse_mouse_scroll_event

pub unsafe extern "C" fn gst_navigation_event_parse_mouse_scroll_event(
    event: *mut GstEvent, 
    x: *mut c_double, 
    y: *mut c_double, 
    delta_x: *mut c_double, 
    delta_y: *mut c_double
) -> gboolean

This is supported on crate feature v1_18 only.