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diff --git a/ingen/client/BlockModel.hpp b/ingen/client/BlockModel.hpp
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+++ b/ingen/client/BlockModel.hpp
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+/*
+  This file is part of Ingen.
+  Copyright 2007-2012 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or 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 Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_CLIENT_BLOCKMODEL_HPP
+#define INGEN_CLIENT_BLOCKMODEL_HPP
+
+#include <cstdlib>
+#include <string>
+#include <vector>
+
+#include "raul/SharedPtr.hpp"
+#include "ingen/GraphObject.hpp"
+#include "ingen/client/ObjectModel.hpp"
+#include "ingen/client/PortModel.hpp"
+#include "ingen/client/PluginModel.hpp"
+
+namespace Raul { class Path; }
+
+namespace Ingen {
+
+class URIs;
+
+namespace Client {
+
+class PluginModel;
+class ClientStore;
+
+/** Block model class, used by the client to store engine's state.
+ *
+ * @ingroup IngenClient
+ */
+class BlockModel : public ObjectModel
+{
+public:
+	BlockModel(const BlockModel& copy);
+	virtual ~BlockModel();
+
+	GraphType graph_type() const { return GraphObject::PATCH; }
+
+	typedef std::vector< SharedPtr<const PortModel> > Ports;
+
+	SharedPtr<const PortModel> get_port(const Raul::Symbol& symbol) const;
+
+	GraphObject* port(uint32_t index) const;
+
+	const Raul::URI&       plugin_uri()   const { return _plugin_uri; }
+	const Plugin*          plugin()       const { return _plugin.get(); }
+	Plugin*                plugin()             { return _plugin.get(); }
+	SharedPtr<PluginModel> plugin_model() const { return _plugin; }
+	uint32_t               num_ports()    const { return _ports.size(); }
+	const Ports&           ports()        const { return _ports; }
+
+	void default_port_value_range(SharedPtr<const PortModel> port,
+	                              float& min, float& max, uint32_t srate=1) const;
+
+	void port_value_range(SharedPtr<const PortModel> port,
+	                      float& min, float& max, uint32_t srate=1) const;
+
+	std::string label() const;
+	std::string port_label(SharedPtr<const PortModel> port) const;
+
+	// Signals
+	INGEN_SIGNAL(new_port, void, SharedPtr<const PortModel>);
+	INGEN_SIGNAL(removed_port, void, SharedPtr<const PortModel>);
+
+protected:
+	friend class ClientStore;
+
+	BlockModel(URIs&             uris,
+	           const Raul::URI&  plugin_uri,
+	           const Raul::Path& path);
+	BlockModel(URIs&                  uris,
+	           SharedPtr<PluginModel> plugin,
+	           const Raul::Path&      path);
+	explicit BlockModel(const Raul::Path& path);
+
+	void add_child(SharedPtr<ObjectModel> c);
+	bool remove_child(SharedPtr<ObjectModel> c);
+	void add_port(SharedPtr<PortModel> pm);
+	void remove_port(SharedPtr<PortModel> pm);
+	void remove_port(const Raul::Path& port_path);
+	void set(SharedPtr<ObjectModel> model);
+
+	virtual void clear();
+
+	Ports                  _ports; ///< Vector of ports
+	Raul::URI              _plugin_uri; ///< Plugin URI (if PluginModel is unknown)
+	SharedPtr<PluginModel> _plugin; ///< The plugin this block is an instance of
+
+private:
+	mutable uint32_t _num_values; ///< Size of _min_values and _max_values
+	mutable float*   _min_values; ///< Port min values (cached for LV2)
+	mutable float*   _max_values; ///< Port max values (cached for LV2)
+};
+
+} // namespace Client
+} // namespace Ingen
+
+#endif // INGEN_CLIENT_BLOCKMODEL_HPP