--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/multimediacommscontroller/mmccavcpayloadformat/inc/avcrtpstruct.h	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,79 @@
+/*
+* 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:    Class to hold depayloadized RTP packet information
+**				 i.e. depayloadized NAL units with appropriate information
+** 			 like timestamp, marker bit etc
+**
+*/
+
+
+
+
+#ifndef AVCRTPSTRUCT_H
+#define AVCRTPSTRUCT_H
+
+#include <e32std.h>
+
+// constants, taken from rfc3984base.h, these are possible values of PT field in the TRTPInfo struct
+// NAL packet types
+#define	PACKET_NAL_SLICE	1
+#define	PACKET_NAL_PARTA	2
+#define	PACKET_NAL_PARTB	3
+#define	PACKET_NAL_PARTC	4
+#define	PACKET_NAL_IDR  	5
+#define PACKET_NAL_SEI  	6
+#define PACKET_NAL_SPS  	7
+#define PACKET_NAL_PPS  	8
+#define PACKET_NAL_AUD  	9
+#define PACKET_NAL_EOS  	10
+#define PACKET_NAL_EOSTR	11
+#define PACKET_NAL_FD   	12
+#define PACKET_NAL_UNIT 	23
+#define PACKET_STAP_A   	24
+#define PACKET_STAP_B   	25
+#define PACKET_MTAP16   	26
+#define PACKET_MTAP24   	27
+#define PACKET_FU_A     	28
+#define PACKET_FU_B     	29
+
+// AVC information
+struct TRTPInfo {
+	TInt64 TS;	// this is in microseconds like TTimeIntervalMicroSeconds
+	TUint16 SN;
+	TUint16 DON;
+	TUint16 NRI;
+	TUint8	PT;		// packet type for H.264
+	TUint8	FUH;	// FU-Header Byte (contains, start, end and reserve bit)
+};
+
+
+// -----------------------------------------------------------------------------
+// SeqDiff -- compares two N but sequence numbers.  Returns the distance of 
+// the second arguement relative to the first.  E.g. SeqDiff<16>(10, 12) == 2 and
+// SeqDiff<16>(12, 10) == -2
+//
+// N must be <= 32
+// -----------------------------------------------------------------------------
+//
+template < unsigned N >
+TInt SeqDiff( TUint aSeqNum1, TUint aSeqNum2 )
+{
+	struct { TInt s:N; } diff;
+	diff.s = aSeqNum2 - aSeqNum1;
+	return diff.s;	// force sign extension of a B bit integer to a 32 bit integer
+}
+
+
+#endif 	// AVCRTPSTRUCT_H
+