mmsharing/mmshengine/inc/musengsession.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 15 Jul 2010 18:35:08 +0300
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/*
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* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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#ifndef MUSENGSESSION_H
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#define MUSENGSESSION_H
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// USER INCLUDES
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#include "musunittesting.h"
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#include "musengvolumechangeobserver.h"
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//SYSTEM INCLUDES
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#include <e32base.h>
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// FORWARD DECLARATIONS
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class CMusEngTelephoneUtils;
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class CMusSipProfileHandler;
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class CRepository;
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class MMusEngAudioRoutingObserver;
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class MMusEngVolumeChangeObserver;
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// CLASS DECLARATION
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/**
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* Base class for Multimedia Sharing Engine sessions, inherited by
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* CMusEngMceSession.
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*
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* CMusEngSession encapsulates all common activities example using
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* resources.
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*
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* @lib musengine.lib
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*/
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class CMusEngSession : public CBase,
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                       public MMusEngVolumeChangeObserver
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    {
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    MUS_UNITTEST( UT_CMusEngSession )
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    public:
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        /**
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        * Desctructor, finalize session
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        *
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        */
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        ~CMusEngSession();
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    public:  // API FUNCTIONS
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        /**
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        * Returns currently assigned drawing area
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        *
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        * @return TRect This session drawing area recttangle
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        */
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        IMPORT_C TRect Rect() const;
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        /**
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        * Sets new drawing area
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        *
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        * @param TRect This session new drawing area rectangle
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        */
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        IMPORT_C void SetRectL( const TRect& aRect );
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        /**
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        * Checks if audio routing can be changed using EnableLoudspeakerL
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        * 
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        * @return ETrue if audio routing can be changed using EnableLoudspeakerL
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        */
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        IMPORT_C TBool AudioRoutingCanBeChanged() const;
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        /**
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		* Checks if audio output is BT
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		* 
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		* @return ETrue if audio routing is BT
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		*/
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        IMPORT_C TBool AudioOutputIsBT() const;
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        /**
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        * Activates/deactivates loadspeaker
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        *
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        * @param TBool Enable or disable loudspeaker
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        * @param TBool Show activation dialog
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        */
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        IMPORT_C void EnableLoudspeakerL( TBool aEnable, TBool aShowDialog );
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        /**
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        * Checks is loudspeaker enabled or disabled.
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        *
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        * @return TBool true if enabled
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        */
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        IMPORT_C TBool IsLoudSpeakerEnabled() const;
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        /**
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        * Returns current volume level
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        */
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        IMPORT_C TInt VolumeL() const;
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        /**
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        * Mutes CS call microphone.
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        */
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        IMPORT_C void MuteMicL( TBool aMute );
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        /**
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        * Returns current CS call mic mute state.
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        */
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        IMPORT_C TBool IsMicMutedL();
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        /**
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        * Sets audio routing observer. Can be set to NULL in order to indicate
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        * ending of observing changes in audio routing.
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        */
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        IMPORT_C void SetAudioRoutingObserver( 
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                                    MMusEngAudioRoutingObserver* aObserver );
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        /**
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        * Sets volume level change observer. Can be set to NULL in order to indicate
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        * ending of observing changes in volume level.
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        */
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        IMPORT_C void SetVolumeChangeObserver( 
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                                    MMusEngVolumeChangeObserver* aObserver );
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    public:  // VIRTUAL API FUNCTIONS
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        /**
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        * Increases volume level by one.
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        */
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        IMPORT_C virtual void VolumeUpL();
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        /**
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        * Decreases volume level by one.
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        */
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        IMPORT_C virtual void VolumeDownL();
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        /**
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        * Set volume value
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        * @param aVal the value of volume 
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        */
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        IMPORT_C virtual void SetVolumeL( TInt aVal );
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        /**
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        * Enables or disables display. Call to this function is considered
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        * as a permission or denial to draw to the display.
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        */
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        virtual void EnableDisplayL( TBool aEnable ) = 0;
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        /**
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        * Mutes current audio stream meaning that any audio is not played or
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        * sent to network.
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        */
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        virtual void MuteL() = 0;
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        /**
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        * Unmute current audio stream meaning that all the audio is played
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        * and if needed also sent to network.
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        */
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        virtual void UnmuteL() = 0;
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        /**
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         *
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         */
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        virtual void RefreshOrientationL() = 0;
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	protected: // INTERNAL 
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        virtual void RectChangedL() = 0;
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        //from MMusEngVolumeChangeObserver
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        virtual void VolumeChanged( TInt aVolume, TBool aAudioRouteChanged );
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0
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    protected:
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        /**
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        * Constructor, private cannot be instantiate
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        *
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        * @param aRect reserved drawing area for this session
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        */
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        CMusEngSession( const TRect& aRect );
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    protected:
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        /**
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        * second-phase constructor, called by those session specific 
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        * constructors
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        */
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        void ConstructL();
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    private: // MEMBERS
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        /**
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        * Drawing area rect.
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        */
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        TRect iRect;
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        /**
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        * Telephone utilities.
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        */
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        CMusEngTelephoneUtils* iTelephoneUtils;
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        /**
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        * Volume change observer
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        */
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        MMusEngVolumeChangeObserver* iVolumeObserver;
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    };
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#endif //MUSENGSESSION_H