/*

* Copyright (c) 2005 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:  Controls how the sound is attenuated with its distance.

*

*/

#ifndef CAMMSEMCDISTANCEATTENUATIONCONTROL_H

#define CAMMSEMCDISTANCEATTENUATIONCONTROL_H

//  INCLUDES

#include <e32base.h>

#include<DistanceAttenuationControl.h>

#include <DistanceAttenuationData.h>

#include "cammsbasedistanceattenuationcontrol.h"

#include <cmmaemcaudioplayer.h>

using multimedia :: MDistanceAttenuationControl;

using multimedia :: KDistanceAttenuationEffectControl;

// CONSTANTS

_LIT(KAMMSEMCDistanceAttenuationControl, "DistanceAttenuationControl");

// CLASS DECLARATION

/**

*

*  Controls for the Distance Attenuation effect.

*  This class delegates Distance Attenuation effect method calls to

*  CDistanceAttenuation.

*

*

*  @since 5.1

*/

NONSHARABLE_CLASS(CAMMSEMCDistanceAttenuationControl): public CAMMSBaseDistanceAttenuationControl

{

public:  // Constructors and destructor

    /**

    * Two-phased constructor.

    * @param aPlayer Player that has this control.

    */

    static CAMMSEMCDistanceAttenuationControl* NewLC(CMMAPlayer* aPlayer);

    /**

    * Destructor.

    */

    ~CAMMSEMCDistanceAttenuationControl();

public: // Overriden the base class function

    /**

    * Sets all the 3D audio distance attenuation parameters simultaneously.

    * Distances are specified in units defined by

    * "GlobalManager.getUnitsPerMeter()"

    *

    * @param aMinDistance The minimum distance, below which the distance

    * gain is clipped to its maximum value of 1.0.

    * @param aMaxDistance The maximum distance, beyond which the distance

    * gain does not decrease any more. The exact behaviour of the gain at

    * distances beyond the maximum distance depends on the value of the

    * muteAfterMax.

    * @param aMuteAfterMax A boolean determining how the distance gain

    * behaves at distances greater than maxDistance: true if beyond the

    * maximum distance the source is silent; false if beyond the maximum

    * distance the source's gain is held constant at the level at the

    * maximum distance.

    * @param aRolloffFactor The rolloff factor, specified in thousandths

    * (1000 representing a rolloff factor of 1.0, 2000 representing 2.0 and

    * 500 representing 0.5). Higher values cause the distance gain to

    * attenuate more quickly.

    * @return The value that was actually set.

    *

    * @par Leaving:

    * @li \c KErrArgument - \a aMaxDistance <= \a aMinDistance,

    * \a aMinDistance <= 0, \a aMaxDistance <= 0 or \a aRolloffFactor < 0

    */

    void SetParametersL(

        TInt aMinDistance,

        TInt aMaxDistance,

        TBool aMuteAfterMax,

        TInt aRolloffFactor);

public: // Functions from base classes

    const TDesC& ClassName() const;

    /**

    * Prepares the Control.

    */

    void PrepareControlL();

    /**

    * Deallocates the Control.

    */

    void DeallocateControl();

private:

    /**

    * C++ constructor.

    * @param aPlayer Player that has this control.

    */

    CAMMSEMCDistanceAttenuationControl(CMMAPlayer* aPlayer);

private:  // Data

    CMMAPlayer *iMMAPlayer;

    CMultimediaFactory* iFactory;

    MStreamControl* iStreamControl;

    MDistanceAttenuationControl *iMDistanceAttenuationControl;

};

#endif // CAMMSEMCDISTANCEATTENUATIONCONTROL_H