/*

* 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 EQUALIZEREFFECTIMPL_H

#define EQUALIZEREFFECTIMPL_H

#include <e32base.h>

#include <EqualizerControl.h>

#include "EffectControlBase.h"

#include <AudioEqualizerProxy.h>

#include <MAudioEffectObserver.h>

namespace multimedia

    {

	class MControlObserver;

    class CEqualizerEffect : public CBase,

                          public MEqualizerControl,

                          public MAudioEffectObserver,

                          public CEffectControlBase

        {

    public:

        CEqualizerEffect();

        ~CEqualizerEffect();

        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 MEqualizerEffect begins

		/**

        * Get the band level in mB for the specified band

        * @since 3.0

        * @param aBand Frequency Band

        * @return Returns the band level in mB for the specified band

        */

		TInt BandLevel( TInt& aBand, TInt& aBandLevel );

		/**

        * Get the band width in Hz for the specified band.

        * @since 3.0

        * @param aBand Frequency Band

        * @return The band width in Hz for the specified band

        */

		TInt BandWidth( TInt& aBand, TInt& aBandWidth );

		/**

        * Get the center frequency in Hz for a given band

        * @since 3.0

        * @param aBand Frequency Band

        * @return The center frequency in Hz for a given band.

        */

		TInt CenterFrequency( TInt& aBand, TInt& aCenterFrequency );

		/**

        * Get the cross-over frequency between the given frequency band (aBand) and the next band

        * @since 3.0

        * @param aBand Frequency Band

        * @return Crossover frequency.

        */

		TInt CrossoverFrequency( TInt& aBand, TInt& aCrossoverFreq );

		/**

        * Get the dB range in mB for the equalizer

        * @since 3.0

        * @param aMin Minimum level in dB

        * @param aMin Maximum level in dB

        */

		TInt DbLevelLimits( TInt& aMin, TInt& aMax );

		/**

        * Get number of equalizer bands.

        * @since 3.0

        * @param -

        * @return The number of equalizer bands.

        */

		TInt NumberOfBands(TInt& aNumberofBands);

		/**

        * Sets the equalizer band level value in mB, ranging from Min to Max

        * @since 3.0

        * @param aBand Frequency Band

        * @param aLevel band level in dB, ranges from DbLevelLimits()

        * @return -

        */

		TInt SetBandLevel( TInt& aBand, TInt& aLevel );

       // From MEqualizerEffect 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:

        CAudioEqualizerProxy* iEqualizerProxy;

        CAudioEqualizerProxy* iPrevEqualizerProxy;

        TMMFMessageDestinationPckg iMsgHndlrHandlePckg;

        MCustomCommand* iCustomCommand;        

        RPointerArray<MControlObserver> iObservers;    

        };

    } // namespace multimedia

#endif // EQUALIZEREFFECTIMPL_H

// End of file