1 /*

     2 * Copyright (c) 2006 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 "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Project file for EnhancedMediaClient Utility

    15 *

    16 */

    17 

    18 

    19 #ifndef LOUDNESSEFFECTIMPL_H

    20 #define LOUDNESSEFFECTIMPL_H

    21 

    22 #include <e32base.h>

    23 #include <LoudnessControl.h>

    24 #include "EffectControlBase.h"

    25 #include <LoudnessProxy.h>

    26 #include <MAudioEffectObserver.h>

    27 

    28 namespace multimedia

    29     {

    30 	class MControlObserver;

    31     class CLoudnessEffect : public CBase,

    32                           public MLoudnessControl,

    33                           public MAudioEffectObserver,

    34                           public CEffectControlBase

    35         {

    36     public:

    37         CLoudnessEffect();

    38         ~CLoudnessEffect();

    39         TInt PostConstructor();

    40 

    41         // From MControl begins

    42         TInt AddObserver( MControlObserver& aObserver );

    43         TInt RemoveObserver( MControlObserver& aObserver );

    44         TUid Type();

    45         TControlType ControlType();  

    46         // From MControl ends

    47 

    48         // From MEffectControl begins

    49         TInt Apply();

    50         // From MEffectControl ends

    51         

    52         // From MLoudnessEffect begins

    53        // From MLoudnessEffect ends

    54 

    55 		// From MAudioEffectControl

    56 		/**

    57         * Disable the effect

    58         * @since 5.0

    59         */

    60 		TInt Disable();

    61 

    62 		/**

    63         * Enable the effect

    64         * @since 5.0

    65         */

    66 		TInt Enable();

    67 

    68 		/**

    69         * Enforce the effect.

    70         * @since 5.0

    71         * @param aEnforced Indicate the effect is to be enforced or not. ETrue = Enforced.

    72         */

    73 		TInt Enforce( TBool &aEnforced );

    74 

    75 		/**

    76         * Check if this effect object currently has update rights.

    77         * A client can lose update rights in some hardware platforms where there are a limited

    78         * number of instances of an effect that can exist at the same time. When an effect instance

    79         * has lost update rights the user can still change settings, but any calls to Apply the

    80         * settings will be deferred until update rights are regained.

    81         * @since 5.0

    82         * @return ETrue if this object currently has rights to update the settings of this effect,

    83         *         EFalse otherwise.

    84         */

    85 		TInt HaveUpdateRights(TBool &aHaveUpdateRights);

    86 

    87 		/**

    88         * Check if the effect is enabled

    89         * @since 5.0

    90         * @return ETrue if the effect is enabled, EFalse if the effect is disabled.

    91         */

    92 		TInt IsEnabled(TBool &aEnabled);

    93 

    94 		/**

    95         * Check if the effect is enforced.

    96         * @since 5.0

    97         * @return ETrue if the effect is enforced, EFalse if the effect isn ot enforced.

    98         */

    99 		TInt IsEnforced(TBool &aEnforced);

   100 

   101 		/*

   102         * Get the unique identifier of the audio effect

   103         * @since 5.0

   104         * @return Unique identifier of the audio effect object.

   105         */

   106 		TInt Uid(TUid &aUid);

   107 		// From MAudioEffectControl Ends

   108 

   109         // MAudioEffectObserver begins

   110         void EffectChanged( const CAudioEffect* aObservedEffect, TUint8 aEvent );

   111         // MAudioEffectObserver ends

   112         

   113         // From CEffectControlBase begins

   114         void Event( TEffectControlEvent aEvent );

   115         // From CEffectControlBase ends

   116     

   117     private:

   118         TInt DoApply();        

   119         TInt CreateEffectProxy();

   120         TInt DeleteEffectProxy();    

   121         TInt SavePreviousSettings();   

   122     

   123     private:

   124         CLoudnessProxy* iLoudnessProxy;

   125         CLoudnessProxy* iPrevLoudnessProxy;

   126         TMMFMessageDestinationPckg iMsgHndlrHandlePckg;

   127         MCustomCommand* iCustomCommand;        

   128         RPointerArray<MControlObserver> iObservers;    

   129         };

   130     } // namespace multimedia

   131 

   132 #endif // LOUDNESSEFFECTIMPL_H

   133 

   134 // End of file