+DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, string& why_not) const
+{
+ shared_ptr<DCPDecoder> decoder;
+ try {
+ decoder = make_shared<DCPDecoder>(film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>());
+ } catch (dcp::ReadError &) {
+ /* We couldn't read the DCP, so it's probably missing */
+ return false;
+ } catch (DCPError &) {
+ /* We couldn't read the DCP, so it's probably missing */
+ return false;
+ } catch (dcp::KDMDecryptionError &) {
+ /* We have an incorrect KDM */
+ return false;
+ }
+
+ for (auto i: decoder->reels()) {
+ if (type == TextType::OPEN_SUBTITLE) {
+ if (i->main_subtitle() && i->main_subtitle()->entry_point().get_value_or(0) != 0) {
+ /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
+ why_not = _("one of its subtitle reels has a non-zero entry point so it must be re-written.");
+ return false;
+ }
+ }
+ if (type == TextType::CLOSED_CAPTION) {
+ for (auto j: i->closed_captions()) {
+ if (j->entry_point().get_value_or(0) != 0) {
+ /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
+ why_not = _("one of its closed caption has a non-zero entry point so it must be re-written.");
+ return false;
+ }
+ }
+ }
+ }
+
+ if (trim_start() != dcpomatic::ContentTime()) {
+ /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
+ why_not = _("it has a start trim so its subtitles or closed captions must be re-written.");
+ return false;
+ }
+
+ /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
+ return can_reference(
+ film,
+ [type](shared_ptr<const Content> c) {
+ return std::find_if(c->text.begin(), c->text.end(), [type](shared_ptr<const TextContent> t) { return t->type() == type; }) != c->text.end();
+ },
+ _("they overlap other text content; remove the other content."),
+ why_not
+ );
+}
+
+void
+DCPContent::take_settings_from (shared_ptr<const Content> c)
+{
+ auto dc = dynamic_pointer_cast<const DCPContent>(c);
+ if (!dc) {
+ return;
+ }
+
+ if (this == dc.get()) {
+ return;
+ }
+
+ boost::mutex::scoped_lock lm(_mutex);
+ boost::mutex::scoped_lock lm2(dc->_mutex);
+
+ _reference_video = dc->_reference_video;
+ _reference_audio = dc->_reference_audio;
+ _reference_text = dc->_reference_text;
+}
+
+void
+DCPContent::set_cpl (string id)