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