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diff --git a/libs/evoral/evoral/EventSink.hpp b/libs/evoral/evoral/EventSink.hpp
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+++ b/libs/evoral/evoral/EventSink.hpp
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+/* This file is part of Evoral.
+ * Copyright (C) 2008 Dave Robillard <http://drobilla.net>
+ * Copyright (C) 2000-2008 Paul Davis
+ * 
+ * Evoral 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.
+ * 
+ * Evoral 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 details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef EVORAL_EVENT_SINK_HPP
+#define EVORAL_EVENT_SINK_HPP
+
+#include <evoral/types.hpp>
+
+namespace Evoral {
+
+
+/** Pure virtual base for anything you can write events to.
+ */
+class EventSink {
+public:
+	virtual size_t write(timestamp_t    time,
+	                     uint32_t       size,
+	                     const uint8_t* buf) = 0;
+};
+
+
+} // namespace Evoral
+
+#endif // EVORAL_EVENT_SINK_HPP
+