/* 

 *

 * Copyright (c) <2010> Comarch S.A. and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

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

 *

 * Original Contributors:

 * Comarch S.A. - original contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#ifndef HSHFPREMOTEAUDIOVOLUMECONTROL_H

#define HSHFPREMOTEAUDIOVOLUMECONTROL_H

#include <e32base.h>

#include "hfpfeaturecommons.h"

class CHsHFPCommand;

class CHsHFPSettings;

/**

 * @brief Represents "Remote audio volume control" feature

 */

class CHsHFPRemoteAudioVolumeControl : public CBase,

        public MHsHFPProcedureCommons

    {

public:

    /**

     * Two-phased constructor.

     * 

     * @param aObserver feature observer

     * 

     * @return instance of class

     */

    static CHsHFPRemoteAudioVolumeControl* NewL(

            MHsHFPFeatureProviderObserver* aObserver);

    /**

     * Two-phased constructor.

     * 

     * @param aObserver feature observer

     * 

     * @return instance of class

     */

    static CHsHFPRemoteAudioVolumeControl* NewLC(

            MHsHFPFeatureProviderObserver* aObserver);

    /**

     * Destructor.

     */

    ~CHsHFPRemoteAudioVolumeControl();

public:

    /**

     * Synchronizes volume levels in AG and HF

     * 

     * @param aInputCmd input AT command

     * @param aOutputCmd response

     * 

     * @return KErrNone if successful, otherwise one of the system-wide error

     * codes

     */

    TInt VolumeLevelSynchronization(const CHsHFPCommand &aInputCmd,

            CHsHFPCommand &aOutputCmd);

    /**

     * Resets local setting after client disconnection

     */

    void Reset();

public:

    //Method inherited from MHsHFPProcedureCommons

    TInt ProcessCommand(const CHsHFPCommand &aInputCmd,

            CHsHFPCommand &aOutputCmd);

private:

    /**

     * Constructor for performing 1st stage construction

     * 

     * @param aObserver feature observer

     */

    CHsHFPRemoteAudioVolumeControl(MHsHFPFeatureProviderObserver* aObserver);

    /**

     * Constructor for performing 2nd stage construction

     */

    void ConstructL();

private:

    /** Pointer to observer */

    MHsHFPFeatureProviderObserver* iObserver;

    /** Denotes if volume level synchronization is finished */

    TBool iVolumeLevelSynchronized;

    /** Denotes if OK command is expected */

    TBool iWaitingForOK;

    /** Denotes if VGM command is expected */

    TBool iWaitingForVgmOK;

    /** Profile setting */

    CHsHFPSettings* iSettings;

    };

#endif // HSHFPREMOTEAUDIOVOLUMECONTROL_H