/*

* Copyright (c) 2006 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:  Project file for EnhancedMediaClient Utility

*

*/

#ifndef STEREOWIDENINGEFFECTIMPL_H

#define STEREOWIDENINGEFFECTIMPL_H

#include <e32base.h>

#include <StereoWideningControl.h>

#include "EffectControlBase.h"

#include <StereoWideningProxy.h>

#include <MAudioEffectObserver.h>

namespace multimedia

    {

	class MControlObserver;

    class CStereoWideningEffect : public CBase,

                          public MStereoWideningControl,

                          public MAudioEffectObserver,

                          public CEffectControlBase

        {

    public:

        CStereoWideningEffect();

        ~CStereoWideningEffect();

        TInt PostConstructor();

        // From MControl begins

        TInt AddObserver( MControlObserver& aObserver );

        TInt RemoveObserver( MControlObserver& aObserver );

        TUid Type();

        TControlType ControlType();  

        // From MControl ends

        // From MEffectControl begins

        TInt Apply();

        // From MEffectControl ends

        // From MStereoWideningEffect begins

        /**

        * Check if continuous level is supported for stereo widening.

        * @since 5.0

        * @param  ETrue if continuous level is supported for stereo widening.  If this returns

        *         EFalse, then the adaptation is actually setting the level to the nearest supported discrete

        *         value, when SetStereoWidenlingLevelL is called.

        * @return Error Code

        */

        TInt IsContinuousLevelSupported(TBool& aSupported);

        /**

        * Set stereo widening level.

        * @since 5.0

        * @param aLevel Stereo widening level ranges from 0-100, where 0 is None and 100 is Maximum widening.

        */

        TInt SetStereoWideningLevel( TInt aLevel );

        /**

        * Get the stereo widening settings.

        * @since 5.0

        * @param aLevel Gets the Current Stereo widening level

        * @return Error Code

        */

        TInt StereoWideningLevel(TInt& aLevel);

       // From MStereoWideningEffect ends

		// From MAudioEffectControl

		/**

        * Disable the effect

        * @since 5.0

        */

		TInt Disable();

		/**

        * Enable the effect

        * @since 5.0

        */

		TInt Enable();

		/**

        * Enforce the effect.

        * @since 5.0

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

        */

		TInt Enforce( 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 5.0

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

        *         EFalse otherwise.

        */

		TInt HaveUpdateRights(TBool &aHaveUpdateRights);

		/**

        * Check if the effect is enabled

        * @since 5.0

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

        */

		TInt IsEnabled(TBool &aEnabled);

		/**

        * Check if the effect is enforced.

        * @since 5.0

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

        */

		TInt IsEnforced(TBool &aEnforced);

		/*

        * Get the unique identifier of the audio effect

        * @since 5.0

        * @return Unique identifier of the audio effect object.

        */

		TInt Uid(TUid &aUid);

		// From MAudioEffectControl Ends

        // MAudioEffectObserver begins

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

        // MAudioEffectObserver ends

        // From CEffectControlBase begins

        void Event( TEffectControlEvent aEvent );

        // From CEffectControlBase ends

    private:

        TInt DoApply();        

        TInt CreateEffectProxy();

        TInt DeleteEffectProxy();    

        TInt SavePreviousSettings();   

    private:

        CStereoWideningProxy* iStereoWideningProxy;

        CStereoWideningProxy* iPrevStereoWideningProxy;

        TMMFMessageDestinationPckg iMsgHndlrHandlePckg;

        MCustomCommand* iCustomCommand;        

        RPointerArray<MControlObserver> iObservers;    

        };

    } // namespace multimedia

#endif // STEREOWIDENINGEFFECTIMPL_H

// End of file