+ DCPTime const fade_in_start = DCPTime::from_seconds (subtitles.front().in().as_seconds ());
+ DCPTime const fade_in_end = fade_in_start + DCPTime::from_seconds (subtitles.front().fade_up_time().as_seconds ());
+ DCPTime const fade_out_end = DCPTime::from_seconds (subtitles.front().out().as_seconds ());
+ DCPTime const fade_out_start = fade_out_end - DCPTime::from_seconds (subtitles.front().fade_down_time().as_seconds ());
+ if (fade_in_start <= time && time <= fade_in_end && fade_in_start != fade_in_end) {
+ fade_factor = DCPTime(time - fade_in_start).seconds() / DCPTime(fade_in_end - fade_in_start).seconds();
+ } else if (fade_out_start <= time && time <= fade_out_end && fade_out_start != fade_out_end) {
+ fade_factor = 1 - DCPTime(time - fade_out_start).seconds() / DCPTime(fade_out_end - fade_out_start).seconds();
+ }
+