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diff --git a/src/server/InputPort.hpp b/src/server/InputPort.hpp
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+/* This file is part of Ingen.
+ * Copyright 2007-2011 David 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 INGEN_ENGINE_INPUTPORT_HPP
+#define INGEN_ENGINE_INPUTPORT_HPP
+
+#include <string>
+#include <cstdlib>
+#include <cassert>
+#include "raul/List.hpp"
+#include "raul/SharedPtr.hpp"
+#include "PortImpl.hpp"
+
+namespace Ingen {
+namespace Server {
+
+class ConnectionImpl;
+class Context;
+class NodeImpl;
+class OutputPort;
+class ProcessContext;
+
+/** An input port on a Node or Patch.
+ *
+ * All ports have a Buffer, but the actual contents (data) of that buffer may be
+ * set directly to the incoming connection's buffer if there's only one inbound
+ * connection, to eliminate the need to copy/mix.
+ *
+ * If a port has multiple connections, they will be mixed down into the local
+ * buffer and it will be used.
+ *
+ * \ingroup engine
+ */
+class InputPort : virtual public PortImpl
+{
+public:
+	InputPort(BufferFactory&      bufs,
+	          NodeImpl*           parent,
+	          const Raul::Symbol& symbol,
+	          uint32_t            index,
+	          uint32_t            poly,
+	          PortType    type,
+	          const Raul::Atom&   value,
+	          size_t              buffer_size=0);
+
+	virtual ~InputPort() {}
+
+	typedef Raul::List< SharedPtr<ConnectionImpl> > Connections;
+
+	void               add_connection(Connections::Node* c);
+	Connections::Node* remove_connection(ProcessContext& context, const OutputPort* src_port);
+
+	bool apply_poly(Raul::Maid& maid, uint32_t poly);
+
+	bool get_buffers(BufferFactory&                   bufs,
+	                 Raul::Array<BufferFactory::Ref>* buffers,
+	                 uint32_t                         poly);
+
+	void pre_process(Context& context);
+	void post_process(Context& context);
+
+	size_t num_connections() const { return _num_connections; } ///< Pre-process thread
+	void increment_num_connections() { ++_num_connections; }
+	void decrement_num_connections() { --_num_connections; }
+
+	bool is_input()  const { return true; }
+	bool is_output() const { return false; }
+
+	bool direct_connect() const;
+
+protected:
+	size_t      _num_connections; ///< Pre-process thread
+	Connections _connections;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_INPUTPORT_HPP