/*

* 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: 

*

*/

#ifndef MUSHENGSESSIONOBSERVER_H

#define MUSHENGSESSIONOBSERVER_H

#include <e32std.h>

// CLASS DECLARATION

/**

* An interface to be implemented by users of Multimedia Sharing Engine if 

* they wish to receive events from session and streaming state changes.

*

* @lib museng.lib

* @since S60 v3.2

*/

class MMusEngSessionObserver

    {

    public:

        /**

        * Indicates that incoming or outgoing session has been established.

        *

        * @since S60 v3.2

        */

        virtual void SessionEstablished() = 0;

        /**

        * Indicates that session has been terminated.

        * After this function call session object must deleted.

        * Function is synchronous, use active object which actives

        * delete.

        *

        * @since S60 v3.2

        */

        virtual void SessionTerminated() = 0;

        /**

        * Current session has lost network connection.

        *

        * @since S60 v3.2

        */

        virtual void SessionConnectionLost() = 0; 

        /**

        * Undefined exception has occurred. Session is useless and must be

        * deleted. Function is synchronous, use active object which actives

        * delete.

        *

        * @since S60 v3.2

        */

        virtual void SessionFailed() = 0;

        /**

        * Current stream state is changed to idle meaning that

        * we are not sending or receiving RTP.

        *

        * @since S60 v3.2

        */

        virtual void StreamIdle() = 0;

        /**

        * Current session state is changed to idle.

        *

        * @since S60 v3.2

        */

        virtual void StreamStreaming() = 0;        

        /**

        * Update time information of this session

        *

        * @since S60 v3.2

        */

        virtual void SessionTimeChanged( const TTimeIntervalSeconds& aSeconds ) = 0;

        /**

        * RTCP inactivity timeout has occurred.

        *

        * @since S60 v3.2

        */

        virtual void InactivityTimeout() = 0;

    };

#endif