tsrc/mceclientstub/inc/mcertpsource.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 CMCERTPSOURCE_H
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#define CMCERTPSOURCE_H
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// INCLUDES
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#include <e32std.h>
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#include <mcemediasource.h>
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// CONSTANTS
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const TMceSourceType KMceRTPSource = 1;
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const TInt KMceJitterBufferLength = 10;
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const TInt KMceJitterBufferTreshold = 5;
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//FORWARD DECLARATIONS
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class TMceIds;
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// CLASS DECLARATION
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/**
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* Class representing incoming RTP stream in MCE.
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*
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* CMceRtpSource can be used to receive media data from network.
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* It can be configured with stream specific values to avoid
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* jitter generated by network. It may also be configured to
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* recognize separate media bursts instead of just receiving
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* continuous flow of data. 
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*
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* Events from this class can be received through class MMceRtpObserver.
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*
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* Enable and Disable operations to it are considered to be local, 
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* so they are not signalled to remote terminal.
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*
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* One CMceRTPSource may contain several RTP streams which are identified with
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* synchronization source (SSRC) values. Disabling or enabling CMceRtpSource
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* will affect to all SSRCs but streaming from specific SSRC can be also
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* controlled with EnableSSRCL and Disable SSRCL methods. These are also
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* local operations, thus not signalled to remote terminal.
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* 
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*  @lib mceclient.lib
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*/
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class CMceRtpSource: public CMceMediaSource
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	{
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	public: // Constructors and destructor
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	    /**
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	    * Two-phased constructor.
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	    * @param aBufferLength, length in packets of jitter buffer
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	    * @param aBufferTreshold, treshold in packets of jitter buffer
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	    * @param aInactivityTimer, timer (ms) to detect network inactivity.
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	    *		 If 0, no activity detection, otherwise source is set to support
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	    *        talk bursts and report inactivity.
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	    * @param aIdentity, identity of user placed in RTCP, ownership not transferred.
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	    */
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		IMPORT_C static CMceRtpSource* NewL(
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									  TUint aBufferLength = KMceJitterBufferLength,
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									  TUint aBufferTreshold = KMceJitterBufferTreshold,
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									  TUint32 aInactivityTimer = 0,
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									  HBufC8* aIdentity = 0 );
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	    /**
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	    * Two-phased constructor.
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	    * @param aBufferLength, length in packets of jitter buffer
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	    * @param aBufferTreshold, treshold in packets of jitter buffer
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	    * @param aInactivityTimer, timer (ms) to detect network inactivity.
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	    *		 If 0, no activity detection, otherwise source is set to support
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	    *        talk bursts and report inactivity.
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	    * @param aIdentity, identity of user placed in RTCP, ownership not transferred.
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	    */
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		IMPORT_C static CMceRtpSource* NewLC(
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									  TUint aBufferLength = KMceJitterBufferLength,
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									  TUint aBufferTreshold = KMceJitterBufferTreshold,
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									  TUint32 aInactivityTimer = 0,
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									  HBufC8* aIdentity = 0 );
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	    /**
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	    * Destructor.
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	    */
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		IMPORT_C ~CMceRtpSource();
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	public: // From base class
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	    /**
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	    * Enables streaming explicitly.
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	    */
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		IMPORT_C void EnableL(); 
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	    /**
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	    * Disables streaming explicitly.
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	    */
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		IMPORT_C void DisableL(); 
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	public: // Functions
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	    /**
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	    * Enables RTP inactivity timer.
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	    * @param aInactivityTimer, timer value (ms) that after inactivity
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		*		 of media from network is reported to client.
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	    */
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		IMPORT_C void EnableInactivityTimerL( TUint32 aInactivityTimer ); 
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	    /**
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	    * Disables RTP inactivity timer.
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	    */
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		IMPORT_C void DisableInactivityTimerL(); 
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	    /**
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	    * Updates settings for incoming session.
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	    * @pre CMceSession::State() == CMceSession::EIncoming 
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	    * @param aBufferLength, length in packets of jitter buffer
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	    * @param aBufferTreshold, treshold in packets of jitter buffer
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	    * @param aInactivityTimer, timer (ms) to detect network inactivity.
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	    *		 If 0, no activity detection, otherwise source is set to support
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	    *        talk bursts and report inactivity.
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	    * @param aIdentity, identity of user placed in RTCP, ownership not transferred.
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	    */
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		IMPORT_C void UpdateL ( TUint aBufferLength = KMceJitterBufferLength,
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								TUint aBufferTreshold = KMceJitterBufferTreshold,
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								TUint32 aInactivityTimer = 0,
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								HBufC8* aIdentity = 0 );
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		/**
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	    * Sends RTCP receiver report to recipient.
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	    */
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		IMPORT_C void SendRRL(); 
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        /**
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        * Returns the last RTP stream source identifier 
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        * used in network (SSRC). 
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        * @pre CMceSession::State() == CMceSession::EEstablished 
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        * @return last source identifier used in network (SSRC).
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        */
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        IMPORT_C TUint32 Ssrc() const;
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        /**
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        * Gets an array of RTP synchronization source (SSRC) identifiers. 
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        * Array includes all SSRC values this RtpSource has received RTP from.
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        * Changes in array are notified using MMceRtpObserver interface.
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        * @return array of synchronization source identifiers
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        */ 
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        IMPORT_C const RArray<TUint>& Ssrcs() const;			
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        /**
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        * Enables streaming from specified synchronization source (SSRC).
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        * @param aSsrc synchronization source to be enabled
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        */			
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        IMPORT_C void EnableSsrcL( TUint aSsrc );
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        /**
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        * Disables streaming from specified synchronization source (SSRC).
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        * @param aSsrc synchronization source to be disabled
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        */			
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        IMPORT_C void DisableSsrcL( TUint aSsrc );
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        /**
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        * Determines whether specific SSRC is enabled or not.
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        * @param aSsrc the SSRC identifier
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        * @return ETrue if specified SSRC is enabled; otherwise EFalse
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        */			
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        IMPORT_C TBool IsSsrcEnabledL( TUint aSsrc );
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	private:
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	    /**
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	    * C++ default constructor.
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	    */
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		CMceRtpSource();
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	    /**
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	    * second-phase constructor
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	    * @param aBufferLength, length in packets of jitter buffer
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	    * @param aBufferTreshold, treshold in packets of jitter buffer
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	    * @param aInactivityTimer, timer (ms) to detect network inactivity.
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	    *		 If 0, no activity detection, otherwise source is set to support
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	    *        talk burts and report inactivity.
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	    * @param aMediaBurstIndicator, indicator sound to be played before
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	    *        every new burst of media, if source in media burst mode.
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	    */
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		void ConstructL( TUint aBufferLength,
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                         TUint aBufferTreshold,
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                         TUint32 aInactivityTimer,
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                         HBufC8* iMediaBurstIndicator );
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	public: // Stub data
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         RArray<TUint> iSsrcs;
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	     TUint iBufferLength;
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         TUint iBufferTreshold;
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         TUint32 iInactivityTimer;
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         TUint32 iSilenceTimer;
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         TUint iToneFrequency;
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         TUint iToneLength;
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         HBufC8* iMediaBurstIndicator; 
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	};
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#endif