diff -r 000000000000 -r bde4ae8d615e os/mm/devsoundextensions/effects/AudioEqualizer/AudioEqualizerProxy/Src/AudioEqualizerEventObserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/mm/devsoundextensions/effects/AudioEqualizer/AudioEqualizerProxy/Src/AudioEqualizerEventObserver.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,99 @@
+/*
+* Copyright (c) 2004 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:   Definition of the event observer class
+*
+*/
+
+
+
+
+#ifndef CAUDIOEQUALIZEREVENTOBSERVER_H
+#define CAUDIOEQUALIZEREVENTOBSERVER_H
+
+// INCLUDES
+#include <e32base.h>
+#include "AudioEqualizerProxy.h"
+
+
+// CLASS DECLARATION
+
+/**
+*  AudioEqualizer event observer provides encapsulates a monitoring request towards the message handler.
+*
+*  @lib AudioEqualizerProxy.lib
+*  @since 3.0
+*/
+class CAudioEqualizerEventObserver : public CActive
+    {
+    public: // Constructors and destructor
+
+        /**
+        * Two-phased constructor.
+        */
+        static CAudioEqualizerEventObserver* NewL(TMMFMessageDestinationPckg aMessageHandler, MCustomCommand& aCustomCommand,
+        								  		  MAudioEqualizerCallback& aCallback);
+
+        /**
+        * Destructor.
+        */
+        virtual ~CAudioEqualizerEventObserver();
+
+    public: // New functions
+
+        /**
+        * Start event monitoring
+        * @since 3.0
+        */
+        void Start();
+
+       	/**
+        * Stop event monitoring
+        * @since 3.0
+        */
+        void Stop();
+
+
+    private:
+
+        /**
+        * C++ default constructor.
+        */
+        CAudioEqualizerEventObserver();
+
+        /**
+        * By default Symbian 2nd phase constructor is private.
+        */
+        void ConstructL(TMMFMessageDestinationPckg aMessageHandler, MCustomCommand& aCustomCommand,
+        				MAudioEqualizerCallback& aCallback);
+
+        void RunL();
+
+        void DoCancel();
+
+    private:
+
+		// Pointer to custom command utility
+		MCustomCommand* iCustomCommand;
+		// Message handler handle
+		TMMFMessageDestinationPckg iMessageHandler;
+		// AudioEqualizer change event Callbacks
+		MAudioEqualizerCallback* iCallback;
+		// Data package received from server
+		TEfAudioEqualizerCombinedDataPckg iDataPckgFrom;
+		//
+		TBool iStopped;
+	};
+
+#endif 		// CAUDIOEQUALIZEREVENTOBSERVER_H
+