1 files changed, 94 insertions, 0 deletions
diff --git a/src/libs/engine/Event.hpp b/src/libs/engine/Event.hpp
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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave 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 EVENT_H
+#define EVENT_H
+
+#include <cassert>
+#include <raul/SharedPtr.hpp>
+#include <raul/Deletable.hpp>
+#include "interface/Responder.hpp"
+#include "types.hpp"
+#include "ThreadManager.hpp"
+
+namespace Raul { class Path; }
+using Raul::Path;
+
+using Ingen::Shared::Responder;
+
+namespace Ingen {	
+
+class Engine;
+
+
+/** Base class for all events (both realtime and QueuedEvent).
+ *
+ * This is for time-critical events like note ons.  There is no non-realtime
+ * pre-execute method as in QueuedEvent's, any lookups etc need to be done in the
+ * realtime execute() method.
+ *
+ * QueuedEvent extends this class with a pre_process() method for any work that needs
+ * to be done before processing in the realtime audio thread.
+ *
+ * \ingroup engine
+ */
+class Event : public Raul::Deletable
+{
+public:
+	virtual ~Event() {}
+
+	/** Execute this event in the audio thread (MUST be realtime safe). */
+	virtual void execute(SampleCount nframes, FrameTime start, FrameTime end)
+	{
+		assert(ThreadManager::current_thread_id() == THREAD_PROCESS);
+		assert(!_executed);
+		assert(_time <= end);
+
+		// Missed the event, jitter, damnit.
+		if (_time < start)
+			_time = start;
+
+		_executed = true;
+	}
+	
+	/** Perform any actions after execution (ie send replies to commands)
+	 * (no realtime requirements). */
+	virtual void post_process()
+	{
+		assert(ThreadManager::current_thread_id() == THREAD_POST_PROCESS);
+	}
+	
+	inline SampleCount time() { return _time; }
+		
+protected:
+	Event(Engine& engine, SharedPtr<Shared::Responder> responder, FrameTime time)
+	: _engine(engine)
+	, _responder(responder)
+	, _time(time)
+	, _executed(false)
+	{}
+	
+	Engine&                      _engine;
+	SharedPtr<Shared::Responder> _responder;
+	FrameTime                    _time;
+	bool                         _executed;
+};
+
+
+} // namespace Ingen
+
+#endif // EVENT_H