Rename Subtitle -> Text

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

diff --git a/src/lib/text_file_decoder.cc b/src/lib/text_file_decoder.cc
new file mode 100644 (file)
index 0000000..1dba3ac
--- /dev/null
+++ b/src/lib/text_file_decoder.cc
@@ -0,0 +1,84 @@
+/*
+    Copyright (C) 2014-2016 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "text_file_decoder.h"
+#include "text_file_content.h"
+#include "text_content.h"
+#include <dcp/subtitle_string.h>
+#include <boost/foreach.hpp>
+#include <iostream>
+
+using std::list;
+using std::vector;
+using std::string;
+using std::cout;
+using std::max;
+using boost::shared_ptr;
+using boost::optional;
+using boost::dynamic_pointer_cast;
+
+TextTextDecoder::TextTextDecoder (shared_ptr<const TextFileContent> content, shared_ptr<Log> log)
+       : TextFile (content)
+       , _next (0)
+{
+       subtitle.reset (new TextDecoder (this, content->subtitle, log));
+}
+
+void
+TextTextDecoder::seek (ContentTime time, bool accurate)
+{
+       /* It's worth back-tracking a little here as decoding is cheap and it's nice if we don't miss
+          too many subtitles when seeking.
+       */
+       time -= ContentTime::from_seconds (5);
+       if (time < ContentTime()) {
+               time = ContentTime();
+       }
+
+       Decoder::seek (time, accurate);
+
+       _next = 0;
+       while (_next < _subtitles.size() && ContentTime::from_seconds (_subtitles[_next].from.all_as_seconds ()) < time) {
+               ++_next;
+       }
+}
+
+bool
+TextTextDecoder::pass ()
+{
+       if (_next >= _subtitles.size ()) {
+               return true;
+       }
+
+       ContentTimePeriod const p = content_time_period (_subtitles[_next]);
+       subtitle->emit_text (p, _subtitles[_next]);
+
+       ++_next;
+       return false;
+}
+
+ContentTimePeriod
+TextTextDecoder::content_time_period (sub::Subtitle s) const
+{
+       return ContentTimePeriod (
+               ContentTime::from_seconds (s.from.all_as_seconds()),
+               ContentTime::from_seconds (s.to.all_as_seconds())
+               );
+}