rtp/srtpstack/inc/tsrtpstreamoutstatebase.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:03:15 +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:    Base class for outgoing SRTP stream states
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*
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*/
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#ifndef TSRTPSTREAMOUTSTATEBASE_H
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#define TSRTPSTREAMOUTSTATEBASE_H
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// INCLUDES
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#include <e32std.h>
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#include "tsrtpstreamstatebase.h"
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// FORWARD DECLARATIONS
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class MSRTPStreamOutContext;
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class MSRTPCryptoHandlerContext;
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class MSRTCPCryptoHandlerContext;
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// CLASS DECLARATION
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class TSRTPStreamOutStateBase : public TSRTPStreamStateBase
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	{
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	protected:	// Constructors and destructor
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		TSRTPStreamOutStateBase(MSRTPStreamOutContext& aStreamContext,
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		    MSRTPCryptoHandlerContextRTP& aCryptoHandlerRTPContext,
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		    MSRTPCryptoHandlerContextRTCP& aCryptoHandlerRTCPContext);
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	public: // New methods
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        /**
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        * virtual function for protecting plain RTP packet.
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        * implemented in substates of TSRTPStreamOutStateBase.
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        * @param aPacket plain RTP packet
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        * @leave KErrNone if success, system-wide error code otherwise        
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        * @return HBufC8* encrypted packet
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        */                              	
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		virtual HBufC8* DoProtectRtpL(const TDesC8& aPacket)=0;
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        /**
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        * virtual function for protecting plain RTCP packet.
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        * implemented in substates of TSRTPStreamOutStateBase.
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        * @param aPacket plain RTCP packet
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        * @leave KErrNone if success, system-wide error code otherwise        
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        * @return HBufC8* encrypted packet
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        */                              	
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		virtual HBufC8* DoProtectRtcpL(const TDesC8& aPacket)=0;
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	private: // Constructors
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		/// Default constructor. Not implemented.
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		TSRTPStreamOutStateBase();
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	protected: // Data
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		/* 
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	    * interface for a transmitting stream for changing state
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	    */
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		MSRTPStreamOutContext& iStreamContext;
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	};
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#endif // TSRTPStreamOutStateBase_H