diff -r 04980be5c5fe -r ff8a573c0e2e mmsharing/mmshengine/inc/musengvolumechangeobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmsharing/mmshengine/inc/musengvolumechangeobserver.h	Mon Mar 15 12:40:08 2010 +0200
@@ -0,0 +1,46 @@
+/*
+* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+
+#ifndef MUSENGVOLUMECHANGEOBSERVER_H
+#define MUSENGVOLUMECHANGEOBSERVER_H
+
+// INCLUDES
+#include <e32def.h>
+
+// CLASS DECLARATION
+
+/**
+* An interface to be implemented by users of Multimedia Sharing Engine if 
+* they wish to be notified about volume level CenRep keys change
+*
+*/
+class MMusEngVolumeChangeObserver
+    {
+    public: 
+    
+        /**
+	    * Indicates that volume level was changed either by some other 
+	    * application or due to audio route change
+	    * @param aVolume new volume level
+	    * @param aAudioRouteChanged indicates whether volume level changed due
+	    *        to audio route change
+	    */
+        virtual void VolumeChanged( TInt aVolume, TBool aAudioRouteChanged ) = 0;        
+    };
+
+#endif