// Copyright (c) 2005-2009 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:

//

/**

 @file

 @internalComponent

*/

#ifndef AVCTPPACKETSTATICS_H

#define AVCTPPACKETSTATICS_H

#include <bluetoothav.h>

#include <bluetooth/avctptypes.h>

namespace SymbianAvctp

{

const static TUint8 KUndefinedTransactionLabel = SymbianAvctp::KMaxTransactionLabel;

const static TUint8 KIsValidPidMask		= 0x01;

const static TUint8 KMessageTypeMask	= 0x02;

const static TUint8 KPacketTypeMask		= 0x0C;

const static TUint8 KTransactionMask	= 0xF0;

const static TUint KNormalHeaderPidOffset = 1;

const static TUint KStartHeaderPidOffset  = 2;	

const static TUint KNumFragmentsOffset = 1;

const static TUint KTransactionLabelShift  = 4;	

const static TUint KPacketTypeShift  = 2;	

const static TUint KResponseMsgBit  = 2;	

/**

Types of packet, as indicated in the packet header.

Note these are the actual values used in the AVCTP v1.0

spec.

*/ 

enum TPacketType

	{

	/** An unfragmented AVCTP packet */

	ENormalPkt		= 0x0,

	/** An AVCTP fragment start packet */

	EStartFrag		= 0x1,

	/** An AVCTP fragment continue packet */

	EContinueFrag	= 0x2,

	/** An AVCTP fragment end packet */

	EEndFrag		= 0x3,

	/** This value should never be used in practise. It's only for initialisation */

	EUnknownPkt		= 0x4,

	};

/**

Offset of the data within an AVCTP packet

*/

enum TPduHeaderLength

	{

	/** For an unfragmented AVCTP packet */

	ENormalHeaderLength		= 0x3,

	/** For an AVCTP fragment start packet */

	EStartFragHeaderLength	= 0x4,

	/** For an AVCTP fragment continue or end packet */

	EOtherFragHeaderLength	= 0x1,

	/** The minimum length of the three headers */

	EMinimumHeaderLength = 0x1,

	};			

// Avctp packet parsing functions 

IMPORT_C TMessageType MessageType(const TDesC8& aData);

IMPORT_C TPacketType PacketType(const TDesC8& aData);

IMPORT_C TTransactionLabel TransactionLabel(const TDesC8& aData);

IMPORT_C TBool IsValidPid(const TDesC8& aData);

IMPORT_C TPid Pid(const TDesC8& aData);

IMPORT_C TUint8 FragmentsInSdu(const TDesC8& aData);

IMPORT_C TPduHeaderLength ConvertPacketTypeToHeaderLength(TPacketType aPktType);

} // end of namespace SymbianAvctp

#endif // AVCTPPACKETSTATICS_H