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diff --git a/src/engine/LADSPANode.hpp b/src/engine/LADSPANode.hpp
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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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 LADSPANODE_H
+#define LADSPANODE_H
+
+#include <string>
+#include <ladspa.h>
+#include <boost/optional.hpp>
+#include "types.hpp"
+#include "NodeBase.hpp"
+#include "PluginImpl.hpp"
+
+namespace Ingen {
+
+
+/** An instance of a LADSPA plugin.
+ *
+ * \ingroup engine
+ */
+class LADSPANode : public NodeBase
+{
+public:
+	LADSPANode(PluginImpl*              plugin,
+	           const string&            name,
+	           bool                     polyphonic,
+	           PatchImpl*               parent,
+	           const LADSPA_Descriptor* descriptor,
+	           SampleRate               srate,
+	           size_t                   buffer_size);
+
+	~LADSPANode();
+
+	bool instantiate();
+	
+	bool prepare_poly(uint32_t poly);
+	bool apply_poly(Raul::Maid& maid, uint32_t poly);
+
+	void activate();
+	void deactivate();
+	
+	void process(ProcessContext& context);
+	
+	void set_port_buffer(uint32_t voice, uint32_t port_num, Buffer* buf);
+
+protected:
+	void get_port_limits(unsigned long            port_index,
+	                     boost::optional<Sample>& default_value,
+	                     boost::optional<Sample>& lower_bound,
+	                     boost::optional<Sample>& upper_bound);
+	
+	const LADSPA_Descriptor* _descriptor;
+	Raul::Array<LADSPA_Handle>* _instances;
+	Raul::Array<LADSPA_Handle>* _prepared_instances;
+};
+
+
+} // namespace Ingen
+
+#endif // LADSPANODE_H