--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mm_pub/audio_effects_api/inc/MAudioEffectObserver.h	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,56 @@
+/*
+* 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 Audio Effect Observer class.
+*
+*/
+
+
+
+#ifndef AUDIOEFFECTOBSERVER_H
+#define AUDIOEFFECTOBSERVER_H
+
+// CLASS DECLARATION
+
+
+/**
+*  Interface class to be implemented by objects that are interested in receiving events from
+*  audio effect.
+*
+*  @since 3.0
+*/
+class MAudioEffectObserver
+    {
+    public:
+
+		static const TUint KEnabled = 1;				// The effect is enabled.
+		static const TUint KDisabled = 2;				// The effect is disabled
+		static const TUint KEnforced = 3;				// The effect is enforced
+		static const TUint KNotEnforced = 4;			// The effect is not enforced
+		static const TUint KLostUpdateRights = 5;		// The effect has lost update rights
+		static const TUint KGainedUpdateRights = 6;		// The effect has gained update rights
+		static const TUint KSpecificEffectBase = 20;	// Offset to specific effect events
+
+        /**
+        * Invoked by the audio effect object when the status of the audio effect has changed.
+        * @since 3.0
+        * @param aObservedEffect The effect that changed
+        * @param aEvent The specific event Id of the effect that changed.
+        */
+        virtual void EffectChanged( const CAudioEffect* aObservedEffect, TUint8 aEvent ) = 0;
+
+    };
+
+#endif      // AUDIOEFFECTOBSERVER_H
+
+// End of File