Function gstreamer_video_sys::gst_video_calculate_display_ratio

pub unsafe extern "C" fn gst_video_calculate_display_ratio(
    dar_n: *mut c_uint, 
    dar_d: *mut c_uint, 
    video_width: c_uint, 
    video_height: c_uint, 
    video_par_n: c_uint, 
    video_par_d: c_uint, 
    display_par_n: c_uint, 
    display_par_d: c_uint
) -> gboolean