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2906f4c2 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
18 | /////////////////////////////////////////////////////////////////////////////// | |
19 | /// | |
20 | /// This class provides access to ITS SDD digits in raw data. | |
21 | /// | |
22 | /////////////////////////////////////////////////////////////////////////////// | |
23 | ||
24 | #include "AliITSRawStreamSDD.h" | |
25 | #include "AliRawReader.h" | |
26 | ||
27 | ClassImp(AliITSRawStreamSDD) | |
28 | ||
2906f4c2 | 29 | const Int_t AliITSRawStreamSDD::fgkDDLModuleMap[kDDLsNumber][kModulesPerDDL] = { |
30 | {240,241,242,246,247,248,252,253,254,258,259,260,264,265,266,270,271,272,276,277,278,-1}, | |
31 | {243,244,245,249,250,251,255,256,257,261,262,263,267,268,269,273,274,275,279,280,281,-1}, | |
32 | {282,283,284,288,289,290,294,295,296,300,301,302,306,307,308,312,313,314,318,319,320,-1}, | |
33 | {285,286,287,291,292,293,297,298,299,303,304,305,309,310,311,315,316,317,321,322,323,-1}, | |
34 | {324,325,326,327,332,333,334,335,340,341,342,343,348,349,350,351,356,357,358,359,364,365}, | |
35 | {328,329,330,331,336,337,338,339,344,345,346,347,352,353,354,355,360,361,362,363,368,369}, | |
36 | {366,367,372,373,374,375,380,381,382,383,388,389,390,391,396,397,398,399,404,405,406,407}, | |
37 | {370,371,376,377,378,379,384,385,386,387,392,393,394,395,400,401,402,403,408,409,410,411}, | |
38 | {412,413,414,415,420,421,422,423,428,429,430,431,436,437,438,439,444,445,446,447,452,453}, | |
39 | {416,417,418,419,424,425,426,427,432,433,434,435,440,441,442,443,448,449,450,451,456,457}, | |
40 | {454,455,460,461,462,463,468,469,470,471,476,477,478,479,484,485,486,487,492,493,494,495}, | |
1ba0280f | 41 | {458,459,464,465,466,467,472,473,474,475,480,481,482,483,488,489,490,491,496,497,498,499}}; |
42 | ||
43 | const UInt_t AliITSRawStreamSDD::fgkCodeLength[8] = {8, 18, 2, 3, 4, 5, 6, 7}; | |
2906f4c2 | 44 | |
45 | AliITSRawStreamSDD::AliITSRawStreamSDD(AliRawReader* rawReader) : | |
46 | AliITSRawStream(rawReader) | |
47 | { | |
48 | // create an object to read ITS SDD raw digits | |
1ba0280f | 49 | |
50 | fData = 0; | |
51 | fSkip = 0; | |
52 | fEventId = 0; | |
53 | fCarlosId = 0; | |
54 | fChannel = 0; | |
55 | fJitter = 0; | |
56 | for(Int_t i=0;i<2;i++){ | |
57 | fChannelData[i]=0; | |
58 | fLastBit[i]=0; | |
59 | fChannelCode[i]=0; | |
60 | fReadCode[i]=kFALSE; | |
61 | fReadBits[i]=0; | |
62 | fTimeBin[i]=0; | |
63 | fAnode[i]=0; | |
64 | fLowThreshold[i]=0; | |
65 | } | |
2906f4c2 | 66 | fRawReader->Select(2); |
1ba0280f | 67 | |
68 | } | |
69 | ||
70 | UInt_t AliITSRawStreamSDD::ReadBits() | |
71 | { | |
72 | // read bits from the given channel | |
73 | ||
74 | UInt_t result = (fChannelData[fChannel] & ((1<<fReadBits[fChannel]) - 1)); | |
75 | fChannelData[fChannel] >>= fReadBits[fChannel]; | |
76 | fLastBit[fChannel] -= fReadBits[fChannel]; | |
77 | return result; | |
2906f4c2 | 78 | } |
79 | ||
1ba0280f | 80 | Int_t AliITSRawStreamSDD::DecompAmbra(Int_t value) const |
81 | { | |
82 | // AMBRA decompression | |
83 | ||
84 | if ((value & 0x80) == 0) { | |
85 | return value & 0x7f; | |
86 | } else if ((value & 0x40) == 0) { | |
87 | return 0x081 + ((value & 0x3f) << 1); | |
88 | } else if ((value & 0x20) == 0) { | |
89 | return 0x104 + ((value & 0x1f) << 3); | |
90 | } else { | |
91 | return 0x208 + ((value & 0x1f) << 4); | |
92 | } | |
93 | } | |
2906f4c2 | 94 | |
95 | Bool_t AliITSRawStreamSDD::Next() | |
96 | { | |
97 | // read the next raw digit | |
98 | // returns kFALSE if there is no digit left | |
99 | ||
100 | fPrevModuleID = fModuleID; | |
101 | if (!fRawReader->ReadNextInt(fData)) return kFALSE; | |
102 | ||
103 | UInt_t relModuleID = (fData >> 25) & 0x0000007F; | |
104 | fModuleID = fgkDDLModuleMap[fRawReader->GetDDLID()][relModuleID]; | |
105 | fCoord1 = (fData >> 16) & 0x000001FF; | |
106 | fCoord2 = (fData >> 8) & 0x000000FF; | |
107 | fSignal = fData & 0x000000FF; | |
108 | ||
109 | return kTRUE; | |
110 | } | |
1ba0280f | 111 |