williamr@2: /*
williamr@2: * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). 
williamr@2: * All rights reserved.
williamr@2: * This component and the accompanying materials are made available
williamr@4: * under the terms of "Eclipse Public License v1.0"
williamr@2: * which accompanies this distribution, and is available
williamr@4: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
williamr@2: *
williamr@2: * Initial Contributors:
williamr@2: * Nokia Corporation - initial contribution.
williamr@2: *
williamr@2: * Contributors:
williamr@2: *
williamr@2: * Description:  Definition of the Audio Effect Observer class.
williamr@2: *
williamr@2: */
williamr@2: 
williamr@2: 
williamr@2: 
williamr@2: #ifndef AUDIOEFFECTOBSERVER_H
williamr@2: #define AUDIOEFFECTOBSERVER_H
williamr@2: 
williamr@2: // CLASS DECLARATION
williamr@2: 
williamr@2: 
williamr@2: /**
williamr@2: *  Interface class to be implemented by objects that are interested in receiving events from
williamr@2: *  audio effect.
williamr@2: *
williamr@2: *  @since 3.0
williamr@2: */
williamr@2: class MAudioEffectObserver
williamr@2:     {
williamr@2:     public:
williamr@2: 
williamr@2: 		static const TUint KEnabled = 1;				// The effect is enabled.
williamr@2: 		static const TUint KDisabled = 2;				// The effect is disabled
williamr@2: 		static const TUint KEnforced = 3;				// The effect is enforced
williamr@2: 		static const TUint KNotEnforced = 4;			// The effect is not enforced
williamr@2: 		static const TUint KLostUpdateRights = 5;		// The effect has lost update rights
williamr@2: 		static const TUint KGainedUpdateRights = 6;		// The effect has gained update rights
williamr@2: 		static const TUint KSpecificEffectBase = 20;	// Offset to specific effect events
williamr@2: 
williamr@2:         /**
williamr@2:         * Invoked by the audio effect object when the status of the audio effect has changed.
williamr@2:         * @since 3.0
williamr@2:         * @param aObservedEffect The effect that changed
williamr@2:         * @param aEvent The specific event Id of the effect that changed.
williamr@2:         */
williamr@2:         virtual void EffectChanged( const CAudioEffect* aObservedEffect, TUint8 aEvent ) = 0;
williamr@2: 
williamr@2:     };
williamr@2: 
williamr@2: #endif      // AUDIOEFFECTOBSERVER_H
williamr@2: 
williamr@2: // End of File