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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_DRIVER_HPP
-#define INGEN_ENGINE_DRIVER_HPP
-
-#include <string>
-#include <boost/utility.hpp>
-#include "raul/Deletable.hpp"
-#include "ingen/PortType.hpp"
-#include "ingen/EventType.hpp"
-#include "DuplexPort.hpp"
-
-namespace Raul { class Path; }
-
-namespace Ingen {
-namespace Engine {
-
-class DuplexPort;
-class ProcessContext;
-
-/** Representation of a "system" (eg outside Ingen) port.
- *
- * This is the class through which the rest of the engine manages everything
- * related to driver ports. Derived classes are expected to have a pointer to
- * their driver (to be able to perform the operation necessary).
- *
- * \ingroup engine
- */
-class DriverPort : boost::noncopyable, public Raul::Deletable {
-public:
- virtual ~DriverPort() {}
-
- /** Set the name of the system port according to new path */
- virtual void move(const Raul::Path& path) = 0;
-
- /** Create system port */
- virtual void create() = 0;
-
- /** Destroy system port */
- virtual void destroy() = 0;
-
- bool is_input() const { return _patch_port->is_input(); }
- DuplexPort* patch_port() const { return _patch_port; }
-
-protected:
- explicit DriverPort(DuplexPort* port) : _patch_port(port) {}
-
- DuplexPort* _patch_port;
-};
-
-/** Driver abstract base class.
- *
- * A Driver is, from the perspective of GraphObjects (nodes, patches, ports) an
- * interface for managing system ports. An implementation of Driver basically
- * needs to manage DriverPorts, and handle writing/reading data to/from them.
- *
- * \ingroup engine
- */
-class Driver : boost::noncopyable {
-public:
- virtual ~Driver() {}
-
- /** Activate driver (begin processing graph and events). */
- virtual void activate() {}
-
- /** Deactivate driver (stop processing graph and events). */
- virtual void deactivate() {}
-
- /** Create a port ready to be inserted with add_input (non realtime).
- * May return NULL if the Driver can not create the port for some reason.
- */
- virtual DriverPort* create_port(DuplexPort* patch_port) = 0;
-
- /** Return the DriverPort for a particular path, iff one exists. */
- virtual DriverPort* driver_port(const Raul::Path& path) = 0;
-
- /** Add a system visible port (e.g. a port on the root patch). */
- virtual void add_port(DriverPort* port) = 0;
-
- /** Remove a system visible port. */
- virtual Raul::Deletable* remove_port(const Raul::Path& path,
- DriverPort** port=NULL) = 0;
-
- /** Return true iff this driver supports the given type of I/O */
- virtual bool supports(PortType port_type,
- EventType event_type) = 0;
-
- virtual void set_root_patch(PatchImpl* patch) = 0;
- virtual PatchImpl* root_patch() = 0;
-
- /** Return the audio buffer size in frames */
- virtual SampleCount block_length() const = 0;
-
- /** Return the sample rate in Hz */
- virtual SampleCount sample_rate() const = 0;
-
- /** Return the current frame time (running counter) */
- virtual SampleCount frame_time() const = 0;
-
- virtual bool is_realtime() const = 0;
-
- virtual ProcessContext& context() = 0;
-};
-
-} // namespace Engine
-} // namespace Ingen
-
-#endif // INGEN_ENGINE_DRIVER_HPP