/*

* 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:    Base class for outgoing SRTP stream states

*

*/

#ifndef TSRTPSTREAMOUTSTATEBASE_H

#define TSRTPSTREAMOUTSTATEBASE_H

// INCLUDES

#include <e32std.h>

#include "tsrtpstreamstatebase.h"

// FORWARD DECLARATIONS

class MSRTPStreamOutContext;

class MSRTPCryptoHandlerContext;

class MSRTCPCryptoHandlerContext;

// CLASS DECLARATION

class TSRTPStreamOutStateBase : public TSRTPStreamStateBase

	{

	protected:	// Constructors and destructor

		TSRTPStreamOutStateBase(MSRTPStreamOutContext& aStreamContext,

		    MSRTPCryptoHandlerContextRTP& aCryptoHandlerRTPContext,

		    MSRTPCryptoHandlerContextRTCP& aCryptoHandlerRTCPContext);

	public: // New methods

        /**

        * virtual function for protecting plain RTP packet.

        * implemented in substates of TSRTPStreamOutStateBase.

        * @param aPacket plain RTP packet

        * @leave KErrNone if success, system-wide error code otherwise        

        * @return HBufC8* encrypted packet

        */                              	

		virtual HBufC8* DoProtectRtpL(const TDesC8& aPacket)=0;

        /**

        * virtual function for protecting plain RTCP packet.

        * implemented in substates of TSRTPStreamOutStateBase.

        * @param aPacket plain RTCP packet

        * @leave KErrNone if success, system-wide error code otherwise        

        * @return HBufC8* encrypted packet

        */                              	

		virtual HBufC8* DoProtectRtcpL(const TDesC8& aPacket)=0;

	private: // Constructors

		/// Default constructor. Not implemented.

		TSRTPStreamOutStateBase();

	protected: // Data

		/* 

	    * interface for a transmitting stream for changing state

	    */

		MSRTPStreamOutContext& iStreamContext;

	};

#endif // TSRTPStreamOutStateBase_H