1 maudioeffectobserver.h

     1 /*

     2 * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * 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

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Definition of the Audio Effect Observer class.

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef AUDIOEFFECTOBSERVER_H

    21 #define AUDIOEFFECTOBSERVER_H

    22 

    23 // CLASS DECLARATION

    24 

    25 

    26 /**

    27 *  Interface class to be implemented by objects that are interested in receiving events from

    28 *  audio effect.

    29 *

    30 *  @since 3.0

    31 */

    32 class MAudioEffectObserver

    33     {

    34     public:

    35 

    36 		static const TUint KEnabled = 1;				// The effect is enabled.

    37 		static const TUint KDisabled = 2;				// The effect is disabled

    38 		static const TUint KEnforced = 3;				// The effect is enforced

    39 		static const TUint KNotEnforced = 4;			// The effect is not enforced

    40 		static const TUint KLostUpdateRights = 5;		// The effect has lost update rights

    41 		static const TUint KGainedUpdateRights = 6;		// The effect has gained update rights

    42 		static const TUint KSpecificEffectBase = 20;	// Offset to specific effect events

    43 

    44         /**

    45         * Invoked by the audio effect object when the status of the audio effect has changed.

    46         * @since 3.0

    47         * @param aObservedEffect The effect that changed

    48         * @param aEvent The specific event Id of the effect that changed.

    49         */

    50         virtual void EffectChanged( const CAudioEffect* aObservedEffect, TUint8 aEvent ) = 0;

    51 

    52     };

    53 

    54 #endif      // AUDIOEFFECTOBSERVER_H

    55 

    56 // End of File