/*

* Copyright (c) 2004-2005 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 __RTPSTPPACKET_H

#define __RTPSTPPACKET_H

//  INCLUDES

#include <rtpstpheader.h>

// FUNCTION PROTOTYPES

void write16( TUint8* const aPointer, TUint32 aValue );

TUint32 read16( const TUint8* const aPointer );

void write32( TUint8* const aPointer, TUint32 aValue );

TUint32 read32( const TUint8* const aPointer );

// CLASS DECLARATION

/**

*  STP packet interface class 

*

*  @lib RtpStpPacket.dll

*/

class MRtpPacketExt

    {

    public:

        virtual void ConstructL( TUint aPacketSize, TRtpId aSessionId ) = 0;

        virtual void Close() = 0;

        virtual void RtpPacketReset() = 0;

        virtual void RtpPacketResetPtr() = 0;  

        virtual TInt RtpPacketBuild( const TRtpSendHeader& aHeader, 

                                     const TDesC8& aPayload ) = 0;

        virtual TInt RtpPacketProcess( TUint8* aBuf, TInt* aLength ) = 0;

        virtual void RegisterRtpObserver( MRtpObserver& aObserver ) = 0;

        virtual void UnregisterRtpObserver() = 0;

        virtual void SetSize( TInt aSize ) = 0;

        virtual TInt Size() const = 0;

        virtual TUint8* Data() const = 0;

        virtual HBufC8* GetHBuf() const = 0;

        virtual const TPtrC8 Des() const = 0;

    };

/**

*  STP packet concrete class 

*

*  @lib RtpStpPacket.dll

*/

class CRtpStpPacket : public CBase, public MRtpPacketExt

    {

    public:

        CRtpStpPacket();

        ~CRtpStpPacket();

        virtual void ConstructL( TUint aPacketSize, TRtpId aSessionId );

        virtual void Close();

        virtual void RtpPacketReset();

        virtual void RtpPacketResetPtr();  

        virtual TInt RtpPacketBuild( const TRtpSendHeader& aHeader, const TDesC8& aPayload );

        virtual TInt RtpPacketProcess( TUint8* aBuf, TInt* aLength );

        inline virtual void RegisterRtpObserver( MRtpObserver& aObserver );

        inline virtual void UnregisterRtpObserver();

        inline virtual void SetSize( TInt aSize );

        inline virtual TInt Size() const;

        inline virtual TUint8* Data() const;

        inline virtual HBufC8* GetHBuf() const;

        inline const TPtrC8 Des() const;

    private : 

        TUint32 read16( const TUint8* const aPointer );

        void write16( TUint8* const aPointer, TUint32 aValue );

    private:

        MRtpObserver* iObserver;

        HBufC8* iBuf;

        TInt iSize;   

        TUint8* iData;          // pointer to the beginning of the iBuf

        TUint8* iDataPtr;       // pointer to the beginning of date unhandled

        TRtpId iSessionId;      // session ID value

    };

#include "rtpstppacket.inl"

#endif  // __RTPSTPPACKET_H

// End of File