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1 /* |
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2 * Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Class to hold depayloadized RTP packet information |
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15 ** i.e. depayloadized NAL units with appropriate information |
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16 ** like timestamp, marker bit etc |
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17 ** |
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18 */ |
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19 |
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20 |
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21 |
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22 |
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23 #ifndef AVCRTPSTRUCT_H |
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24 #define AVCRTPSTRUCT_H |
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25 |
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26 #include <e32std.h> |
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27 |
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28 // constants, taken from rfc3984base.h, these are possible values of PT field in the TRTPInfo struct |
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29 // NAL packet types |
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30 #define PACKET_NAL_SLICE 1 |
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31 #define PACKET_NAL_PARTA 2 |
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32 #define PACKET_NAL_PARTB 3 |
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33 #define PACKET_NAL_PARTC 4 |
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34 #define PACKET_NAL_IDR 5 |
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35 #define PACKET_NAL_SEI 6 |
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36 #define PACKET_NAL_SPS 7 |
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37 #define PACKET_NAL_PPS 8 |
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38 #define PACKET_NAL_AUD 9 |
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39 #define PACKET_NAL_EOS 10 |
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40 #define PACKET_NAL_EOSTR 11 |
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41 #define PACKET_NAL_FD 12 |
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42 #define PACKET_NAL_UNIT 23 |
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43 #define PACKET_STAP_A 24 |
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44 #define PACKET_STAP_B 25 |
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45 #define PACKET_MTAP16 26 |
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46 #define PACKET_MTAP24 27 |
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47 #define PACKET_FU_A 28 |
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48 #define PACKET_FU_B 29 |
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49 |
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50 // AVC information |
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51 struct TRTPInfo { |
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52 TInt64 TS; // this is in microseconds like TTimeIntervalMicroSeconds |
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53 TUint16 SN; |
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54 TUint16 DON; |
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55 TUint16 NRI; |
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56 TUint8 PT; // packet type for H.264 |
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57 TUint8 FUH; // FU-Header Byte (contains, start, end and reserve bit) |
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58 }; |
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59 |
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60 |
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61 // ----------------------------------------------------------------------------- |
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62 // SeqDiff -- compares two N but sequence numbers. Returns the distance of |
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63 // the second arguement relative to the first. E.g. SeqDiff<16>(10, 12) == 2 and |
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64 // SeqDiff<16>(12, 10) == -2 |
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65 // |
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66 // N must be <= 32 |
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67 // ----------------------------------------------------------------------------- |
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68 // |
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69 template < unsigned N > |
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70 TInt SeqDiff( TUint aSeqNum1, TUint aSeqNum2 ) |
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71 { |
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72 struct { TInt s:N; } diff; |
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73 diff.s = aSeqNum2 - aSeqNum1; |
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74 return diff.s; // force sign extension of a B bit integer to a 32 bit integer |
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75 } |
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76 |
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77 |
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78 #endif // AVCRTPSTRUCT_H |
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79 |