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diff --git a/src/engine/machina/NodeFactory.hpp b/src/engine/machina/NodeFactory.hpp
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+++ b/src/engine/machina/NodeFactory.hpp
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+/* This file is part of Machina.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Machina 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.
+ * 
+ * Machina 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 MACHINA_NODEFACTORY_HPP
+#define MACHINA_NODEFACTORY_HPP
+
+#include <raul/SharedPtr.h>
+#include "types.hpp"
+#include "Node.hpp"
+
+namespace Machina {
+
+
+class NodeFactory {
+public:
+	virtual ~NodeFactory() {}
+
+	virtual SharedPtr<Node> create_node(Node::ID      id,
+	                                    unsigned char note,
+	                                    FrameCount    duration) = 0;
+};
+
+
+} // namespace Machina
+
+#endif // MACHINA_NODEFACTORY_HPP