/*

* 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 MMCERTPOBSERVER_H

#define MMCERTPOBSERVER_H

// INCLUDES

#include <e32std.h>  

// FORWARD DECLARATIONS

class CMceMediaStream;

class CMceRtpSource;

// CLASS DECLARATION

/**

*  An interface to be implemented by users of MCE if they wish to receive

*  events from CMceRtpSource.

*

*  This observer is set using CMceManager::SetRtpObserver function.

*

*  @lib mceclient.lib

*/

class MMceRtpObserver

	{

	public: 

        /**

        * Callback function to indicate that an RTCP sender report

		* has been received.

        * @param aSession the session that has changed

        * @param aStream the stream that has changed

        */

        virtual void SRReceived(

				    CMceSession& aSession,

					CMceMediaStream& aStream) = 0;

        /**

        * Callback function to indicate that an RTCP receiver report

		* has been received.

        * @param aSession the session that has changed

        * @param aStream the stream that has changed

        */

        virtual void RRReceived(

				    CMceSession& aSession,

					CMceMediaStream& aStream) = 0;

        /**

        * Callback function to indicate inactivity timer timeout

		* has occurred. Timer is disabled after the timeout.

        * @param aStream, the session that has changed.

        * @param aSource, the source that the timeout occurred.

        */

        virtual void InactivityTimeout(

					CMceMediaStream& aStream,

					CMceRtpSource& aSource) = 0;    

        /**

        * Callback function to indicate that spesified CMceRtpSource has

        * received RTP from a new synchronization source (SSRC).

        * @param aStream the stream that new SSRC was added to

        * @param aSource the source that new SSRC was added to

        * @param aSsrc added SSRC identifier

        */			

        virtual void SsrcAdded(

                        CMceMediaStream& aStream,

                        CMceRtpSource& aSource,

                        TUint aSsrc ) = 0;       

        /**

        * Callback function to indicate that spesified CMceRtpSource has

        * received RTP BYE message from a spesified synchronization 

        * source (SSRC).

        * @param aStream the stream that SSRC was removed from

        * @param aSource the source that SSRC was removed from

        * @param aSsrc removed SSRC identifier

        */	

        virtual void SsrcRemoved(

                        CMceMediaStream& aStream,

                        CMceRtpSource& aSource,

                        TUint aSsrc ) = 0;   

	};

#endif