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+    /*
+
+    Copyright (C) 1998-2000 Stefan Westerfeld
+                            stefan@space.twc.de
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+  
+    This library 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
+    Library General Public License for more details.
+   
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+    Boston, MA 02111-1307, USA.
+
+    */
+
+#ifndef ARTS_BUS_H
+#define ARTS_BUS_H
+
+#include "stdsynthmodule.h"
+#include "artsflow.h"
+
+/*
+ * BC - Status (2002-03-08): BusClient, BusManager
+ *
+ * None of these classes is considered part of the public API. Do NOT use it
+ * in your apps. These are part of the implementation of libartsflow's
+ * Synth_BUS_* and Synth_AMAN_* and AudioManager interfaces. Use these for
+ * public use instead, and don't touch this here.
+ */
+
+
+namespace Arts {
+
+class BusClient
+{
+public:
+	virtual Arts::ScheduleNode *snode() = 0;
+};
+
+
+class BusManager
+{
+protected:
+	struct Bus
+	{
+		std::string name;
+		std::list<BusClient *> clients;
+		std::list<BusClient *> servers;
+		Arts::Synth_MULTI_ADD left, right;
+	};
+	std::list<Bus *> _busList;
+
+	BusManager();
+
+public:
+	Bus* findBus(const std::string& name);
+
+	void addClient(const std::string& busname, BusClient *client);
+	void removeClient(BusClient *client);
+	void addServer(const std::string& busname, BusClient *server);
+	void removeServer(BusClient *server);
+
+	std::vector<std::string> *busList();
+
+	static BusManager *the();
+};
+}
+
+#endif /* ARTS_BUS_H */