+
+ /* Guess intrinsic duration */
+ _intrinsic_duration = latest_subtitle_out().as_editable_units (_edit_rate.numerator / _edit_rate.denominator);
+}
+
+void
+SMPTESubtitleAsset::read_mxf_descriptor (shared_ptr<ASDCP::TimedText::MXFReader> reader, shared_ptr<DecryptionContext> dec)
+{
+ ASDCP::TimedText::TimedTextDescriptor descriptor;
+ reader->FillTimedTextDescriptor (descriptor);
+
+ /* Load fonts */
+
+ for (
+ ASDCP::TimedText::ResourceList_t::const_iterator i = descriptor.ResourceList.begin();
+ i != descriptor.ResourceList.end();
+ ++i) {
+
+ ASDCP::TimedText::FrameBuffer buffer;
+ buffer.Capacity (10 * 1024 * 1024);
+ reader->ReadAncillaryResource (i->ResourceID, buffer, dec->context(), dec->hmac());
+
+ char id[64];
+ Kumu::bin2UUIDhex (i->ResourceID, ASDCP::UUIDlen, id, sizeof (id));
+
+ shared_array<uint8_t> data (new uint8_t[buffer.Size()]);
+ memcpy (data.get(), buffer.RoData(), buffer.Size());
+
+ switch (i->Type) {
+ case ASDCP::TimedText::MT_OPENTYPE:
+ {
+ list<shared_ptr<SMPTELoadFontNode> >::const_iterator j = _load_font_nodes.begin ();
+ while (j != _load_font_nodes.end() && (*j)->urn != id) {
+ ++j;
+ }
+
+ if (j != _load_font_nodes.end ()) {
+ _fonts.push_back (Font ((*j)->id, (*j)->urn, Data (data, buffer.Size ())));
+ }
+ break;
+ }
+ case ASDCP::TimedText::MT_PNG:
+ {
+ list<shared_ptr<Subtitle> >::const_iterator j = _subtitles.begin ();
+ while (j != _subtitles.end() && ((!dynamic_pointer_cast<SubtitleImage>(*j)) || dynamic_pointer_cast<SubtitleImage>(*j)->id() != id)) {
+ ++j;
+ }
+
+ if (j != _subtitles.end()) {
+ dynamic_pointer_cast<SubtitleImage>(*j)->set_png_image (Data(data, buffer.Size()));
+ }
+ break;
+ }
+ default:
+ break;
+ }
+ }
+
+ /* Get intrinsic duration */
+ _intrinsic_duration = descriptor.ContainerDuration;
+}
+
+void
+SMPTESubtitleAsset::set_key (Key key)
+{
+ /* See if we already have a key; if we do, and we have a file, we'll already
+ have read that file.
+ */
+ bool const had_key = static_cast<bool> (_key);
+
+ MXF::set_key (key);
+
+ if (!_key_id || !_file || had_key) {
+ /* Either we don't have any data to read, it wasn't
+ encrypted, or we've already read it, so we don't
+ need to do anything else.
+ */
+ return;
+ }
+
+ /* Our data was encrypted; now we can decrypt it */
+
+ shared_ptr<ASDCP::TimedText::MXFReader> reader (new ASDCP::TimedText::MXFReader ());
+ Kumu::Result_t r = reader->OpenRead (_file->string().c_str ());
+ if (ASDCP_FAILURE (r)) {
+ boost::throw_exception (
+ DCPReadError (
+ String::compose ("Could not read encrypted subtitle MXF (%1)", static_cast<int> (r))
+ )
+ );
+ }
+
+ string s;
+ shared_ptr<DecryptionContext> dec (new DecryptionContext (key, SMPTE));
+ reader->ReadTimedTextResource (s, dec->context(), dec->hmac());
+ shared_ptr<cxml::Document> xml (new cxml::Document ("SubtitleReel"));
+ xml->read_string (s);
+ parse_xml (xml);
+ read_mxf_descriptor (reader, dec);