/* 
 *
 * 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