tsrc/musenginestub/inc/musengmcesession.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:44:37 +0200
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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 MUSHENGMCESESSION_H
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#define MUSHENGMCESESSION_H
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// USER
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#include "musengsession.h"
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#include "musengsessiondurationtimerobserver.h"
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// SYSTEM
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/*
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#include <mcesessionobserver.h>
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#include <mcestreamobserver.h>
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#include <mcertpobserver.h>
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#include <mcetransactiondatacontainer.h>
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*/
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/*
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class CMceManager;
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class CMceSession;
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*/
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class CMusEngSessionDurationTimer;
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// CONSTANTS
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_LIT8( KMusEngAcceptContactHeader,
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       "Accept-Contact: *;+g.3gpp.cs-voice; explicit" );
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_LIT8( KMusEngSessionSdpLineXApplication, "a=X-application:com.nokia.rtvs" );
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// CLASS DECLARATION
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/**
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* Base class for Multimedia Sharing Engine MCE sessions, inherited by
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* CMusEngLiveSession CMusEngClipSession and CMusEngReceiveSession.
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*
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* CMusEngMceSession encapsulates CMCESession and simplifies use of
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* MCE Sessions to user interface. Also splits observers messy events
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* simplified commands like a SessionDisconnected.
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*
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* @lib musengine.lib
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* @since S60 v3.2
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*/
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class CMusEngMceSession : public CMusEngSession,
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                          public MMusEngSessionDurationTimerObserver
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    {
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    public:
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        /**
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        * Destructor
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        *
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        * @since S60 v3.2
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        */
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        ~CMusEngMceSession();
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    public: // API FUNCTIONS
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        /**
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        * Terminates session.
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        * @pre Session is established
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        * @post Session is ready to be deleted
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        * @leave KErrNotReady if precondition is not fullfilled
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        * @since S60 v3.2
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        */
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        IMPORT_C void TerminateL();
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        /**
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        * Releases all this session internal observers. This function is needed
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        * before we could get session store out of this session.
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        * TODO: Is this function really needed? At least at the moment it is
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        * not called from UI.   -HR 21.8.
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        *
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        * @since S60 v3.2
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        */
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        IMPORT_C void ReleaseInternalObservers();
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        /**
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        * Get session time return estabilished session time
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        *
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        * @since S60 v3.2
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        * @return TTime returns time if connection established else < 0
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        */
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        IMPORT_C TTimeIntervalSeconds GetSessionTime() const;
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        /**
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        * Returns current connection state
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        *
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        * @since S60 v3.2
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        * @return TBool returns current connection state
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        */
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        IMPORT_C TBool ConnectionActive() const;
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    public: // VIRTUAL API
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        // No virtual api
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    public: //  from CMusEngSession
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        /**
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        * Increases volume level by one
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        *
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        * @pre Session is ongoing
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        * @since S60 v3.2
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        */
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        IMPORT_C void VolumeUpL();
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        /**
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        * Decreases volume level by one
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        *
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        * @pre Session is ongoing
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        * @since S60 v3.2
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        */
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        IMPORT_C void VolumeDownL();
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        /**
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        * Permission to draw on screen device.
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        *
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        * @pre Session is ongoing
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        * @since S60 v3.2
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        */
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        IMPORT_C void EnableDisplayL( TBool aEnable );
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        /**
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        * Implements virtual from CMusEngSession
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        *
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        * @pre Session is ongoing
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        * @since S60 v3.2
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        */
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        IMPORT_C void MuteL();
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        /**
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        * Implements virtual from CMusEngSession
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        *
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        * @pre Session is ongoing
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        * @since S60 v3.2
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        */
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        IMPORT_C void UnmuteL();
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    protected: // CONSTRUCTORS
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        /**
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        * Constructor
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        *
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        * @since S60 v3.2
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        */
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        CMusEngMceSession( const TRect& aRect );
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        /**
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        * Second-phase constructor
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        *
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        * @since S60 v3.2
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        */
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        void ConstructL();
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    protected: // HELPER FUNCTIONS
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        /**
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        *
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        * @since S60 v3.2
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        */
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        void RectChangedL();
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        /**
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        * Sets session specific SDP line to a session
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        *
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        * @since S60 v3.2
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        */
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        //void SetSessionSdpLinesL( CMceSession& aSession );
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    protected: // internal API
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        /**
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        *
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        * @since S60 v3.2
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        */
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        virtual TBool IsRtpcInactivityTimoutSupported();
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    private: // HELPER FUNCTIONS
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        /**
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        * Start counting session time
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        *
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        * @since S60 v3.2
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        */
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        void InitializeSessionTimer();
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        /**
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        * Callback
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        *
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        * @since S60 v3.2
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        */
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        void UpdateTimerEvent();
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        /**
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        *
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        *
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        * @since S60 v3.2
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        */
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        void DoMuteL( TBool aMute );
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        /**
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        * Increases or decreases current volume of all speakers in session
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        * structure by one.
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        * @pre Current volume of all the speakers is less than MaxVolumeL()
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        *      and at least 1.
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        */
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        void ChangeVolumeByOneL( TBool aIncreaseVolume );
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    private: // Helpers
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        /**
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        * Helper function to avoid three different traps.
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        * Should be replaced when MCE supports different kind of method
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        * detecting end of clip.
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        *
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        * @since S60 v3.2
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        */
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        void CheckClipEndL();
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    public: // MEMBERS
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        /**
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        * Class for connecting to MCE server.
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        * This class provides the connection to the MCE server and
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        * provides functions
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        * for setting observers for asynchronous events.
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        * The user should create only one instance of this class.
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        *
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        * @since S60 v3.2
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        */
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        //CMceManager* iManager;
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        /**
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        * Base class for MCE sessions, inherited by both CMCEInSession and
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        * CMCEOutSession. * CMCESession represents peer-to-peer connection
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        * made with remote terminal. This connection is also known as dialog
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        * and it is set up using SIP INVITE method. The characteristics of the
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        * session are defined by user of this class by attaching media streams
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        * into the session. After the session has been succesfully established,
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        * it can be later updated and must be finally terminated. If for any
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        * reason instance of this class is deleted while in established state,
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        * session is automatically terminated by MCE server.
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        *
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        * @since S60 v3.2
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        */
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        //CMceSession* iSession;
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    public:
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        /**
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        * It is assumed, that user has only one instance of this class.
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        * The same instance is passed between MCE and user, but the data
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        * inside of this container is just updated for each event.
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        *
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        * @since S60 v3.2
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        */
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        //TMceTransactionDataContainer iTransactionDataContainer;
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        /**
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        * Session time. Acts simultaneously as RTCP inactivity timer.
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        *
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        * @since S60 v3.2
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        */
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        TTime iStartTime;
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        CMusEngSessionDurationTimer*   iUpdateTimer;
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        /**
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        * Value indicating seconds gone since last received RTCP sender or
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        * receiver report. Value 20 indicates RTCP inactivity timeout.
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        */
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        TInt iSecondsFromLastRtcpReport;
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        TInt iDisplayEnabled;
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    };
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#endif //MUSHENGMCESESSION_H