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diff --git a/src/server/BufferFactory.hpp b/src/server/BufferFactory.hpp
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+/* This file is part of Ingen.
+ * Copyright 2009-2011 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_BUFFERFACTORY_HPP
+#define INGEN_ENGINE_BUFFERFACTORY_HPP
+
+#include <map>
+#include <boost/intrusive_ptr.hpp>
+#include "ingen/PortType.hpp"
+#include "glibmm/thread.h"
+#include "raul/RingBuffer.hpp"
+#include "raul/AtomicPtr.hpp"
+#include "types.hpp"
+
+namespace Ingen {
+
+namespace Shared { class LV2URIMap; }
+
+namespace Server {
+
+class Engine;
+class Buffer;
+
+class BufferFactory {
+public:
+	BufferFactory(Engine&                             engine,
+	              SharedPtr<Ingen::Shared::LV2URIMap> uris);
+
+	~BufferFactory();
+
+	typedef boost::intrusive_ptr<Buffer> Ref;
+
+	static size_t audio_buffer_size(SampleCount nframes);
+	size_t        default_buffer_size(PortType type);
+
+	Ref get(PortType type, size_t size=0, bool force_create=false);
+
+	Ref silent_buffer() { return _silent_buffer; }
+
+	void set_block_length(SampleCount block_length);
+
+	Ingen::Shared::LV2URIMap& uris() { assert(_uris); return *_uris.get(); }
+
+private:
+	friend class Buffer;
+	void recycle(Buffer* buf);
+
+	Ref create(PortType type, size_t size=0);
+
+	inline Raul::AtomicPtr<Buffer>& free_list(PortType type) {
+		switch (type.symbol()) {
+		case PortType::AUDIO:   return _free_audio;
+		case PortType::CONTROL: return _free_control;
+		case PortType::EVENTS:  return _free_event;
+		case PortType::VALUE:
+		case PortType::MESSAGE: return _free_object;
+		default: throw;
+		}
+	}
+
+	void free_list(Buffer* head);
+
+	Raul::AtomicPtr<Buffer> _free_audio;
+	Raul::AtomicPtr<Buffer> _free_control;
+	Raul::AtomicPtr<Buffer> _free_event;
+	Raul::AtomicPtr<Buffer> _free_object;
+
+	Glib::Mutex                         _mutex;
+	Engine&                             _engine;
+	SharedPtr<Ingen::Shared::LV2URIMap> _uris;
+
+	Ref _silent_buffer;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_BUFFERFACTORY_HPP