- added error checking and allow the game to continue if we cannot init the sound system

- persist error messagebox between program states

source/shared_lib/include/sound/sound_interface.h

@@ -0,0 +1,42 @@
+// ==============================================================
+//	This file is part of Glest Shared Library (www.glest.org)
+//
+//	Copyright (C) 2001-2008 Martio Figueroa
+//
+//	You can redistribute this code 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
+// ==============================================================
+
+#ifndef _SHARED_SOUND_SOUNDINTERFACE_H_
+#define _SHARED_SOUND_SOUNDINTERFACE_H_
+
+#include "sound_factory.h"
+
+namespace Shared{ namespace Sound{
+
+// =====================================================
+//	class SoundInterface
+// =====================================================
+
+class SoundInterface{
+private:
+	SoundFactory *soundFactory;
+
+private:
+	SoundInterface() {}
+	SoundInterface(SoundInterface &);
+	void operator=(SoundInterface &);
+
+public:
+	static SoundInterface &getInstance();
+
+	void setFactory(SoundFactory *soundFactory);
+
+	SoundPlayer *newSoundPlayer();
+};
+
+}}//end namespace
+
+#endif