author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 14 Apr 2010 16:21:36 +0300 | |
branch | RCL_3 |
changeset 11 | 2a28ef775f15 |
parent 0 | 1bce908db942 |
permissions | -rw-r--r-- |
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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: Class to hold depayloadized RTP packet information |
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** i.e. depayloadized NAL units with appropriate information |
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** like timestamp, marker bit etc |
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** |
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*/ |
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#ifndef AVCRTPSTRUCT_H |
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#define AVCRTPSTRUCT_H |
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#include <e32std.h> |
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// constants, taken from rfc3984base.h, these are possible values of PT field in the TRTPInfo struct |
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// NAL packet types |
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#define PACKET_NAL_SLICE 1 |
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#define PACKET_NAL_PARTA 2 |
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#define PACKET_NAL_PARTB 3 |
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#define PACKET_NAL_PARTC 4 |
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#define PACKET_NAL_IDR 5 |
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#define PACKET_NAL_SEI 6 |
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#define PACKET_NAL_SPS 7 |
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#define PACKET_NAL_PPS 8 |
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#define PACKET_NAL_AUD 9 |
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#define PACKET_NAL_EOS 10 |
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#define PACKET_NAL_EOSTR 11 |
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#define PACKET_NAL_FD 12 |
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#define PACKET_NAL_UNIT 23 |
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#define PACKET_STAP_A 24 |
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#define PACKET_STAP_B 25 |
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#define PACKET_MTAP16 26 |
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#define PACKET_MTAP24 27 |
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#define PACKET_FU_A 28 |
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#define PACKET_FU_B 29 |
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// AVC information |
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struct TRTPInfo { |
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TInt64 TS; // this is in microseconds like TTimeIntervalMicroSeconds |
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TUint16 SN; |
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TUint16 DON; |
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TUint16 NRI; |
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TUint8 PT; // packet type for H.264 |
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TUint8 FUH; // FU-Header Byte (contains, start, end and reserve bit) |
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}; |
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// ----------------------------------------------------------------------------- |
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// SeqDiff -- compares two N but sequence numbers. Returns the distance of |
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// the second arguement relative to the first. E.g. SeqDiff<16>(10, 12) == 2 and |
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// SeqDiff<16>(12, 10) == -2 |
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// |
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// N must be <= 32 |
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// ----------------------------------------------------------------------------- |
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// |
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template < unsigned N > |
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TInt SeqDiff( TUint aSeqNum1, TUint aSeqNum2 ) |
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{ |
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struct { TInt s:N; } diff; |
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diff.s = aSeqNum2 - aSeqNum1; |
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return diff.s; // force sign extension of a B bit integer to a 32 bit integer |
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} |
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#endif // AVCRTPSTRUCT_H |
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