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2eb38194 | 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 | /////////////////////////////////////////////////////////////////////////////// | |
17 | /// | |
18 | /// This is a class for reading the VZERO DDL raw data | |
19 | /// The format of the raw data corresponds to the one | |
20 | /// implemented in AliVZEROBuffer class. | |
21 | /// | |
22 | /////////////////////////////////////////////////////////////////////////////// | |
23 | ||
24 | #include "AliVZERORawStream.h" | |
25 | #include "AliRawReader.h" | |
26 | #include "AliLog.h" | |
27 | #include "AliDAQ.h" | |
28 | ||
29 | ClassImp(AliVZERORawStream) | |
30 | ||
31 | //_____________________________________________________________________________ | |
32 | AliVZERORawStream::AliVZERORawStream(AliRawReader* rawReader) : | |
33 | fCell(-1), | |
34 | fADC(-1), | |
35 | fTime(-1), | |
36 | fPosition(-1), | |
37 | fRawReader(rawReader), | |
38 | fData(NULL) | |
39 | { | |
40 | // create an object to read VZERO raw data | |
41 | // | |
42 | // select the raw data corresponding to | |
43 | // the VZERO detector id | |
44 | fRawReader->Reset(); | |
45 | AliDebug(1,Form("Selecting raw data for detector %d",AliDAQ::DetectorID("VZERO"))); | |
46 | fRawReader->Select("VZERO"); | |
47 | } | |
48 | ||
49 | //_____________________________________________________________________________ | |
50 | AliVZERORawStream::~AliVZERORawStream() | |
51 | { | |
52 | // destructor | |
53 | } | |
54 | ||
55 | //_____________________________________________________________________________ | |
56 | void AliVZERORawStream::Reset() | |
57 | { | |
58 | // reset raw stream params | |
59 | ||
60 | fCell = fADC = fTime = fPosition = -1; | |
61 | ||
62 | if (fRawReader) fRawReader->Reset(); | |
63 | } | |
64 | ||
65 | //_____________________________________________________________________________ | |
66 | Bool_t AliVZERORawStream::Next() | |
67 | { | |
68 | // read next digit from the VZERO raw data stream | |
69 | // return kFALSE in case of error or no digits left | |
70 | ||
71 | if (fPosition < 0) { | |
72 | if (!fRawReader->ReadNextData(fData)) return kFALSE; | |
73 | if (fRawReader->GetDataSize()%3 != 0) { | |
74 | fRawReader->AddFatalErrorLog(kRawDataSizeErr,Form("size %d != n*12",fRawReader->GetDataSize())); | |
75 | AliWarning(Form("Wrong VZERO raw data size: %d, expected n*12 bytes!",fRawReader->GetDataSize())); | |
76 | return kFALSE; | |
77 | } | |
78 | fPosition = 0; | |
79 | } | |
80 | ||
81 | if (fPosition >= fRawReader->GetDataSize()) return kFALSE; | |
82 | ||
83 | fCell = GetNextWord(); | |
84 | fADC = GetNextWord(); | |
85 | fTime = GetNextWord(); | |
86 | ||
87 | return kTRUE; | |
88 | } | |
89 | ||
90 | //_____________________________________________________________________________ | |
91 | Int_t AliVZERORawStream::GetNextWord() | |
92 | { | |
93 | // This method returns the next 32 bit word | |
94 | // inside the raw data payload. | |
95 | // The method is supposed to be endian (platform) | |
96 | // independent. | |
97 | if (!fData || fPosition < 0) AliFatal("Raw data payload buffer is not yet initialized !"); | |
98 | ||
99 | Int_t word = 0; | |
100 | word |= fData[fPosition++]; | |
101 | word |= fData[fPosition++] << 8; | |
102 | word |= fData[fPosition++] << 16; | |
103 | word |= fData[fPosition++] << 24; | |
104 | ||
105 | return word; | |
106 | } |