/*

* 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 CMCERTPSOURCE_H

#define CMCERTPSOURCE_H

// INCLUDES

#include <e32std.h>

#include <mcemediasource.h>

// CONSTANTS

const TMceSourceType KMceRTPSource = 1;

const TInt KMceJitterBufferLength = 10;

const TInt KMceJitterBufferTreshold = 5;

//FORWARD DECLARATIONS

class TMceIds;

// CLASS DECLARATION

/**

* Class representing incoming RTP stream in MCE.

*

* CMceRtpSource can be used to receive media data from network.

* It can be configured with stream specific values to avoid

* jitter generated by network. It may also be configured to

* recognize separate media bursts instead of just receiving

* continuous flow of data. 

*

* Events from this class can be received through class MMceRtpObserver.

*

* Enable and Disable operations to it are considered to be local, 

* so they are not signalled to remote terminal.

*

* One CMceRTPSource may contain several RTP streams which are identified with

* synchronization source (SSRC) values. Disabling or enabling CMceRtpSource

* will affect to all SSRCs but streaming from specific SSRC can be also

* controlled with EnableSSRCL and Disable SSRCL methods. These are also

* local operations, thus not signalled to remote terminal.

* 

*  @lib mceclient.lib

*/

class CMceRtpSource: public CMceMediaSource

	{

	public: // Constructors and destructor

	    /**

	    * Two-phased constructor.

	    * @param aBufferLength, length in packets of jitter buffer

	    * @param aBufferTreshold, treshold in packets of jitter buffer

	    * @param aInactivityTimer, timer (ms) to detect network inactivity.

	    *		 If 0, no activity detection, otherwise source is set to support

	    *        talk bursts and report inactivity.

	    * @param aIdentity, identity of user placed in RTCP, ownership not transferred.

	    */

		IMPORT_C static CMceRtpSource* NewL(

									  TUint aBufferLength = KMceJitterBufferLength,

									  TUint aBufferTreshold = KMceJitterBufferTreshold,

									  TUint32 aInactivityTimer = 0,

									  HBufC8* aIdentity = 0 );

	    /**

	    * Two-phased constructor.

	    * @param aBufferLength, length in packets of jitter buffer

	    * @param aBufferTreshold, treshold in packets of jitter buffer

	    * @param aInactivityTimer, timer (ms) to detect network inactivity.

	    *		 If 0, no activity detection, otherwise source is set to support

	    *        talk bursts and report inactivity.

	    * @param aIdentity, identity of user placed in RTCP, ownership not transferred.

	    */

		IMPORT_C static CMceRtpSource* NewLC(

									  TUint aBufferLength = KMceJitterBufferLength,

									  TUint aBufferTreshold = KMceJitterBufferTreshold,

									  TUint32 aInactivityTimer = 0,

									  HBufC8* aIdentity = 0 );

	    /**

	    * Destructor.

	    */

		IMPORT_C ~CMceRtpSource();

	public: // From base class

	    /**

	    * Enables streaming explicitly.

	    */

		IMPORT_C void EnableL(); 

	    /**

	    * Disables streaming explicitly.

	    */

		IMPORT_C void DisableL(); 

	public: // Functions

	    /**

	    * Enables RTP inactivity timer.

	    * @param aInactivityTimer, timer value (ms) that after inactivity

		*		 of media from network is reported to client.

	    */

		IMPORT_C void EnableInactivityTimerL( TUint32 aInactivityTimer ); 

	    /**

	    * Disables RTP inactivity timer.

	    */

		IMPORT_C void DisableInactivityTimerL(); 

	    /**

	    * Updates settings for incoming session.

	    * @pre CMceSession::State() == CMceSession::EIncoming 

	    * @param aBufferLength, length in packets of jitter buffer

	    * @param aBufferTreshold, treshold in packets of jitter buffer

	    * @param aInactivityTimer, timer (ms) to detect network inactivity.

	    *		 If 0, no activity detection, otherwise source is set to support

	    *        talk bursts and report inactivity.

	    * @param aIdentity, identity of user placed in RTCP, ownership not transferred.

	    */

		IMPORT_C void UpdateL ( TUint aBufferLength = KMceJitterBufferLength,

								TUint aBufferTreshold = KMceJitterBufferTreshold,

								TUint32 aInactivityTimer = 0,

								HBufC8* aIdentity = 0 );

		/**

	    * Sends RTCP receiver report to recipient.

	    */

		IMPORT_C void SendRRL(); 

        /**

        * Returns the last RTP stream source identifier 

        * used in network (SSRC). 

        * @pre CMceSession::State() == CMceSession::EEstablished 

        * @return last source identifier used in network (SSRC).

        */

        IMPORT_C TUint32 Ssrc() const;

        /**

        * Gets an array of RTP synchronization source (SSRC) identifiers. 

        * Array includes all SSRC values this RtpSource has received RTP from.

        * Changes in array are notified using MMceRtpObserver interface.

        * @return array of synchronization source identifiers

        */ 

        IMPORT_C const RArray<TUint>& Ssrcs() const;			

        /**

        * Enables streaming from specified synchronization source (SSRC).

        * @param aSsrc synchronization source to be enabled

        */			

        IMPORT_C void EnableSsrcL( TUint aSsrc );

        /**

        * Disables streaming from specified synchronization source (SSRC).

        * @param aSsrc synchronization source to be disabled

        */			

        IMPORT_C void DisableSsrcL( TUint aSsrc );

        /**

        * Determines whether specific SSRC is enabled or not.

        * @param aSsrc the SSRC identifier

        * @return ETrue if specified SSRC is enabled; otherwise EFalse

        */			

        IMPORT_C TBool IsSsrcEnabledL( TUint aSsrc );

	private:

	    /**

	    * C++ default constructor.

	    */

		CMceRtpSource();

	    /**

	    * second-phase constructor

	    * @param aBufferLength, length in packets of jitter buffer

	    * @param aBufferTreshold, treshold in packets of jitter buffer

	    * @param aInactivityTimer, timer (ms) to detect network inactivity.

	    *		 If 0, no activity detection, otherwise source is set to support

	    *        talk burts and report inactivity.

	    * @param aMediaBurstIndicator, indicator sound to be played before

	    *        every new burst of media, if source in media burst mode.

	    */

		void ConstructL( TUint aBufferLength,

                         TUint aBufferTreshold,

                         TUint32 aInactivityTimer,

                         HBufC8* iMediaBurstIndicator );

	public: // Stub data

         RArray<TUint> iSsrcs;

	     TUint iBufferLength;

         TUint iBufferTreshold;

         TUint32 iInactivityTimer;

         TUint32 iSilenceTimer;

         TUint iToneFrequency;

         TUint iToneLength;

         HBufC8* iMediaBurstIndicator; 

	};

#endif