+ list<dcp::SubtitleImage> i;
+ ContentTimePeriod const p = content_time_period (*_next);
+
+ while (_next != _subtitles.end () && content_time_period (*_next) == p) {
+ shared_ptr<dcp::SubtitleString> ns = dynamic_pointer_cast<dcp::SubtitleString>(*_next);
+ if (ns) {
+ s.push_back (*ns);
+ ++_next;
+ } else {
+ /* XXX: perhaps these image subs should also be collected together like the string ones are;
+ this would need to be done both here and in DCPDecoder.
+ */
+
+ shared_ptr<dcp::SubtitleImage> ni = dynamic_pointer_cast<dcp::SubtitleImage>(*_next);
+ if (ni) {
+ emit_subtitle_image (p, *ni, film()->frame_size(), only_text());
+ ++_next;
+ }
+ }
+ }