Recover subtitle language metadata from the places is was written

[dcpomatic.git] / src / lib / film.cc

diff --git a/src/lib/film.cc b/src/lib/film.cc
index 9943711f55cfdc45b3f8a6536a83ffe32447addb..5d298baae5b4009152351a4cc1c3cbf3194d76f5 100644 (file)
--- a/src/lib/film.cc
+++ b/src/lib/film.cc
@@ -686,6 +686,39 @@ Film::read_metadata (optional<boost::filesystem::path> path)
                set_backtrace_file (file ("backtrace.txt"));
        }
 
+       /* Around 2.15.108 we removed subtitle language state from the text content and the ISDCF
+        * metadata and put it into the Film instead.  If we've loaded an old Film let's try and fish
+        * out the settings from where they were so that they don't get lost.
+        */
+
+       optional<dcp::LanguageTag> found_language;
+
+       BOOST_FOREACH (cxml::ConstNodePtr i, f.node_child("Playlist")->node_children("Content")) {
+               cxml::ConstNodePtr text = i->optional_node_child("Text");
+               if (text && text->optional_string_child("Language") && !found_language) {
+                       try {
+                               found_language = dcp::LanguageTag(text->string_child("Language"));
+                       } catch (...) {}
+               }
+       }
+
+       optional<string> isdcf_language = f.node_child("ISDCFMetadata")->optional_string_child("SubtitleLanguage");
+       if (isdcf_language && !found_language) {
+               try {
+                       found_language = dcp::LanguageTag(*isdcf_language);
+               } catch (...) {
+                       try {
+                               found_language = dcp::LanguageTag(boost::algorithm::to_lower_copy(*isdcf_language));
+                       } catch (...) {
+
+                       }
+               }
+       }
+
+       if (found_language) {
+               _subtitle_languages.push_back (*found_language);
+       }
+
        _dirty = false;
        return notes;
 }