Add a 2-frame `delay' on content arriving at the player to give

subtitle content the chance to catch up.  Fixes problems observed
when overlaying a DCP subtitle onto an existing DCP and then seeking
into the first subtitle.  After the seek the decoder positions were:

DCP: 0.
subtitle: first subtitle time.

This causes the DCP decoder to be pass()ed first and so the subtitle
for the video frame has not arrived yet.

I hope this does not cause unpredicted side effects...

1 files changed, 37 insertions, 0 deletions

diff --git a/src/lib/video_adjuster.cc b/src/lib/video_adjuster.cc
new file mode 100644
index 000000000..c945c6668
--- /dev/null
+++ b/src/lib/video_adjuster.cc
@@ -0,0 +1,37 @@
+/*
+    Copyright (C) 2018 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 "video_adjuster.h"
+#include "content_video.h"
+#include <boost/foreach.hpp>
+
+void
+VideoAdjuster::flush ()
+{
+	BOOST_FOREACH (Store i, _store) {
+		Video (i.first, i.second);
+	}
+}
+
+void
+VideoAdjuster::clear ()
+{
+	_store.clear ();
+}