--- a/epoc32/include/audioeffectbase.h	Tue Nov 24 13:55:44 2009 +0000
+++ b/epoc32/include/audioeffectbase.h	Tue Mar 16 16:12:26 2010 +0000
@@ -1,1 +1,161 @@
-audioeffectbase.h
+/*
+* 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 the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
+* which accompanies this distribution, and is available
+* at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  This is the definition of the audio effects base class.
+*
+*
+*/
+
+
+#ifndef CAUDIOEFFECT_H
+#define CAUDIOEFFECT_H
+
+// INCLUDES
+#include <e32base.h>
+
+// FORWARD DECLARATION
+class MAudioEffectObserver;
+
+// CLASS DECLARATION
+
+/**
+*  This is the base class for audio effects.
+*
+*  @lib AudioEffectBase.lib
+*  @since 3.0
+*/
+
+class CAudioEffect : public CBase
+	{
+
+	public: // Constructors and destructor
+
+		/**
+        *	Destructor
+        */
+		IMPORT_C virtual ~CAudioEffect();
+
+    public: // New functions
+
+		/**
+        * Apply effect settings
+        * @since 3.0
+        */
+		virtual void ApplyL() = 0;
+
+		/**
+        * Disable the effect
+        * @since 3.0
+        */
+		IMPORT_C virtual void DisableL();
+
+		/**
+        * Enable the effect
+        * @since 3.0
+        */
+		IMPORT_C virtual void EnableL();
+
+		/**
+        * Enforce the effect.
+        * @since 3.0
+        * @param aEnforced Indicate the effect is to be enforced or not. ETrue = Enforced.
+        */
+		IMPORT_C virtual void EnforceL( TBool aEnforced );
+
+		/**
+        * Check if this effect object currently has update rights.
+        * A client can lose update rights in some hardware platforms where there are a limited
+        * number of instances of an effect that can exist at the same time. When an effect instance
+        * has lost update rights the user can still change settings, but any calls to Apply the
+        * settings will be deferred until update rights are regained.
+        * @since 3.0
+        * @return ETrue if this object currently has rights to update the settings of this effect,
+        *         EFalse otherwise.
+        */
+		IMPORT_C virtual TBool HaveUpdateRights() const;
+
+		/**
+        * Check if the effect is enabled
+        * @since 3.0
+        * @return ETrue if the effect is enabled, EFalse if the effect is disabled.
+        */
+		IMPORT_C virtual TBool IsEnabled() const;
+
+		/**
+        * Check if the effect is enforced.
+        * @since 3.0
+        * @return ETrue if the effect is enforced, EFalse if the effect isn ot enforced.
+        */
+		IMPORT_C virtual TBool IsEnforced() const;
+
+		/**
+        * Adds the specified observer to the list of observers to be notified when
+        * the effect object changes state.
+        * @since 3.0
+        * @param aObserver Object to be added to notifier list.
+        */
+		IMPORT_C void RegisterObserverL( MAudioEffectObserver& aObserver );
+
+		/*
+        * Get the unique identifier of the audio effect
+        * @since 3.0
+        * @return Unique identifier of the audio effect object.
+        */
+		virtual TUid Uid() const = 0 ;
+
+		/**
+        * Removes the specified observer from the list of observers.
+        * @since 3.0
+        * @param aObserver object to be removed.
+        */
+		IMPORT_C void UnRegisterObserver( MAudioEffectObserver& aObserver );
+
+	protected:
+
+		/**
+		* Private C++ constructor for this class.
+        * @since 3.0
+        * @param aEffectObserver	reference to event observer object
+        * @return -
+        */
+		IMPORT_C CAudioEffect();
+
+		/**
+		* Internal function to package data into a descriptor.
+        * @since 3.0
+        * @return A descriptor containing the effect data.
+        */
+		virtual const TDesC8& DoEffectData() = 0 ;
+
+		/**
+		* Internal function to unpack effect data
+        * @since 3.0
+        * @param aEffectDataBuffer Descriptor containing packed effect data
+        */
+        virtual void SetEffectData( const TDesC8& aEffectDataBuffer ) = 0;
+
+	protected: // Data
+
+		// Flag to indicate whether the effect is enabled or not
+		TBool iEnabled;
+		// Flag to indicate wheter the effect is enforced
+		TBool iEnforced;
+		// Flag to indicate wheter the effect current has update rights
+		TBool iHaveUpdateRights;
+		// Pointer to Observers
+		RPointerArray<MAudioEffectObserver> iObservers;
+	};
+
+#endif	// of CAUDIOEFFECT_H
+
+// End of File