1 files changed, 54 insertions, 0 deletions
diff --git a/src/lib/audio_ring_buffers.h b/src/lib/audio_ring_buffers.h
new file mode 100644
index 000000000..cec7c712a
--- /dev/null
+++ b/src/lib/audio_ring_buffers.h
@@ -0,0 +1,54 @@
+/*
+    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/>.
+
+*/
+
+#ifndef DCPOMATIC_AUDIO_RING_BUFFERS_H
+#define DCPOMATIC_AUDIO_RING_BUFFERS_H
+
+#include "audio_buffers.h"
+#include "types.h"
+#include "dcpomatic_time.h"
+#include <boost/shared_ptr.hpp>
+#include <boost/thread.hpp>
+#include <list>
+
+class AudioRingBuffers : public boost::noncopyable
+{
+public:
+	AudioRingBuffers ();
+
+	void put (boost::shared_ptr<const AudioBuffers> data, DCPTime time);
+	void get (float* out, int channels, int frames);
+
+	void clear ();
+	Frame size ();
+
+	DCPTime latest () const {
+		boost::mutex::scoped_lock lm (_mutex);
+		return _latest;
+	}
+
+private:
+	mutable boost::mutex _mutex;
+	std::list<boost::shared_ptr<const AudioBuffers> > _buffers;
+	DCPTime _latest;
+	int _used_in_head;
+};
+
+#endif