Initial butler work.

1 files changed, 79 insertions, 0 deletions

diff --git a/src/lib/video_ring_buffers.cc b/src/lib/video_ring_buffers.cc
new file mode 100644
index 000000000..254285456
--- /dev/null
+++ b/src/lib/video_ring_buffers.cc
@@ -0,0 +1,79 @@
+/*
+    Copyright (C) 2016-2017 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_ring_buffers.h"
+#include "player_video.h"
+#include <boost/foreach.hpp>
+#include <list>
+#include <iostream>
+
+using std::list;
+using std::make_pair;
+using std::cout;
+using std::pair;
+using boost::shared_ptr;
+using boost::optional;
+
+void
+VideoRingBuffers::put (shared_ptr<PlayerVideo> frame, DCPTime time)
+{
+	cout << "put " << to_string(time) << "\n";
+	boost::mutex::scoped_lock lm (_mutex);
+	_data.push_back (make_pair (frame, time));
+}
+
+pair<shared_ptr<PlayerVideo>, DCPTime>
+VideoRingBuffers::get ()
+{
+	boost::mutex::scoped_lock lm (_mutex);
+	if (_data.empty ()) {
+		cout << "get: no data.\n";
+		return make_pair(shared_ptr<PlayerVideo>(), DCPTime());
+	}
+	pair<shared_ptr<PlayerVideo>, DCPTime> const r = _data.front ();
+	cout << "get: here we go! " << to_string(r.second) << "\n";
+	_data.pop_front ();
+	return r;
+}
+
+Frame
+VideoRingBuffers::size () const
+{
+	boost::mutex::scoped_lock lm (_mutex);
+	return _data.size ();
+}
+
+void
+VideoRingBuffers::clear ()
+{
+	boost::mutex::scoped_lock lm (_mutex);
+	_data.clear ();
+}
+
+optional<DCPTime>
+VideoRingBuffers::latest () const
+{
+	boost::mutex::scoped_lock lm (_mutex);
+	if (_data.empty ()) {
+		return optional<DCPTime> ();
+	}
+
+	return _data.back().second;
+}