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diff --git a/src/JackDriver.hpp b/src/JackDriver.hpp
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+/* This file is part of Machina.  Copyright (C) 2007 Dave Robillard.
+ * 
+ * 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_JACKDRIVER_HPP
+#define MACHINA_JACKDRIVER_HPP
+
+#include <raul/JackDriver.h>
+#include <raul/SharedPtr.h>
+#include <jack/midiport.h>
+#include "Machine.hpp"
+
+namespace Machina {
+
+
+class JackDriver : public Raul::JackDriver {
+public:
+	JackDriver();
+
+	void attach(const std::string& client_name);
+	void detach();
+
+	void set_machine(SharedPtr<Machine> machine) { _machine = machine; }
+	
+	// Audio context
+	Timestamp    stamp_to_offset(Timestamp stamp);
+	jack_port_t* output_port()           { return _output_port; }
+	//Timestamp    current_cycle_start()   { return _current_cycle_start; }
+	//Timestamp    current_cycle_offset()  { return _current_cycle_offset; }
+	FrameCount   current_cycle_nframes() { return _current_cycle_nframes; }
+	
+
+protected:
+	virtual void on_process(jack_nframes_t nframes);
+
+private:
+	SharedPtr<Machine> _machine;
+	jack_port_t*       _output_port;
+	Timestamp          _current_cycle_start;
+	Timestamp          _current_cycle_offset; ///< for split cycles
+	FrameCount         _current_cycle_nframes;
+};
+
+
+} // namespace Machina
+
+#endif // MACHINA_JACKDRIVER_HPP