Function gst::ffi::gst_video_calculate_display_ratio

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