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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 | // Buffer to read RAW ALTRO FMD format from a AliRawReader | |
21 | // | |
22 | // This class derives from AliAltroBuffer, but overloads the memer | |
23 | // function Next to do some extra processing. In particular, it tries | |
24 | // to autodetect the sample rate. If zero-suppression was used when | |
25 | // writing the raw data, then the automatic discovery will not work, | |
26 | // and the sample rate should be set explicitly. | |
27 | // | |
28 | #include "AliFMDRawStream.h" // ALIFMDRAWSTREAM_H | |
29 | #include <AliRawReader.h> // ALIRAWREADER_H | |
30 | ||
31 | //____________________________________________________________________ | |
32 | ClassImp(AliFMDRawStream) | |
33 | ||
34 | //____________________________________________________________________ | |
35 | AliFMDRawStream::AliFMDRawStream(AliRawReader* reader, UShort_t sampleRate) | |
36 | : AliAltroRawStream(reader), | |
37 | fSampleRate(sampleRate), | |
38 | fPrevTime(-1), | |
39 | fExplicitSampleRate(kFALSE) | |
40 | { | |
41 | if (fSampleRate > 0) fExplicitSampleRate = kTRUE; | |
42 | } | |
43 | ||
44 | //_____________________________________________________________________________ | |
45 | Bool_t | |
46 | AliFMDRawStream::Next() | |
47 | { | |
48 | // read the next raw digit | |
49 | // returns kFALSE if there is no digit left | |
50 | fPrevTime = fTime; | |
51 | if (AliAltroRawStream::Next()) { | |
52 | if (!fExplicitSampleRate && fPrevPad != fPad) | |
53 | fSampleRate = fTimeBunch / 128; | |
54 | return kTRUE; | |
55 | } | |
56 | return kFALSE; | |
57 | } | |
58 | ||
59 | //_____________________________________________________________________________ | |
60 | // | |
61 | // EOF | |
62 | // |