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[u/mrichter/AliRoot.git] / RAW / AliAltroBuffer.h
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3ea47630 1/* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
2 * See cxx source for full Copyright notice */
3
4/////////////////////////////////////////////////////
5// Class used for read-write the ALTRO data format //
6/////////////////////////////////////////////////////
7
8/*This class is an interface between the altro format file and the
9 user, and can be used in write or read mode
10 In the write mode a new altro file is created and filled using the method FillBuffer().
11 The name of the file is specified as parameter in the constructor as well as the type mode.
12 In the Read mode the specified file is open and the values can be read using the
13 methods GetNext() and GetNextBackWord().
14 The first method is used to read the file forward while the second is used to read backward
15*/
16
17#ifndef AliALTROBUFFER_H
18#define AliALTROBUFFER_H
19
20#include <TObject.h>
21#ifdef __CINT__
22class fstream;
23#else
24#include "Riostream.h"
25#endif
26
5802cf2d 27class AliAltroMapping;
3ea47630 28
29class AliAltroBuffer: public TObject {
30 public:
5802cf2d 31 AliAltroBuffer(const char* fileName, Int_t flag, const AliAltroMapping *mapping = NULL);
3ea47630 32 virtual ~AliAltroBuffer();
33
34 void FillBuffer(Int_t val);
35 //this method stores a word into the buffer
36 Int_t GetFreeCellNumber()const {return fFreeCellBuffer;}
37 //this method returns the number of free cells of the internal buffer
38 Int_t GetNextBackWord();
39 //this method returns the next word of 10 bit (reading the file backward) if it exists -1 otherwise
40 Int_t GetNext();
41 //this method returns the next word of 10 bit (reading the file forward) if it exists -1 otherwise
42
43 void WriteTrailer(Int_t wordsNumber, Int_t padNumber,
44 Int_t rowNumber, Int_t secNumber);
45 //this method is used to write the trailer
5802cf2d 46 void WriteDummyTrailer(Int_t wordsNumber, Int_t padNumber,
47 Int_t rowNumber, Int_t secNumber);
48 //this method is used to write a dummy trailer
3ea47630 49 Bool_t ReadTrailer(Int_t& wordsNumber, Int_t& padNumber,
50 Int_t& rowNumber, Int_t &secNumber);
51 //this method is used to read the trailer when the file is read forward
16e29964 52 Bool_t ReadDummyTrailer(Int_t& wordsNumber, Int_t& padNumber,
53 Int_t& rowNumber, Int_t &secNumber);
54 //this method is used to read the trailer when the file is read forward
3ea47630 55 Bool_t ReadTrailerBackward(Int_t& wordsNumber, Int_t& padNumber,
56 Int_t& rowNumber, Int_t& secNumber);
57 //this method is used to read the trailer when the file is read backward
58
59 void WriteChannel(Int_t padNumber, Int_t rowNumber, Int_t secNumber,
60 Int_t nTimeBins, const Int_t* adcValues,
61 Int_t threshold = 0);
62 //this method is used to write all ADC values and the trailer of a channel
63
64 void WriteDataHeader(Bool_t dummy, Bool_t compressed);
65 //this method is used to write the data header
b0aef454 66 Bool_t ReadDataHeader();
67 //this method is used to read the data header
3ea47630 68 void SetVerbose(Int_t val) {fVerbose = val;}
69 //this method is used to set the verbose level
70 //level 0 no output messages
71 //level !=0 some messages are displayed during the run
72 void Flush();
73 //this method is used to fill the buffer with 2AA hexadecimal value and save it into the output file
74 Int_t GetFillWordsNum() const {return fEndingFillWords;}
75
16e29964 76 void SetMapping(AliAltroMapping *mapping) { fMapping = mapping; }
77
3ea47630 78 private:
79 AliAltroBuffer(const AliAltroBuffer& source);
80 AliAltroBuffer& operator = (const AliAltroBuffer& source);
81
82 UInt_t fBuffer[5]; //Buffer dimension is 32*5=160 bits and it contains 16 values
83 //A value is never splitted in two Buffer
84
85
86 Int_t fShift; //This variable contains the number of free bits in the current cell of
87 //the Buffer after that the value Val is been inserted.
88 //size of Int_t is 32 bit that is the same size of a cell of Buffer so
89 //the shift operation are performed only on value Val.
90 Int_t fCurrentCell; //This variable contains the cell number of the cell currently used
91 Int_t fFreeCellBuffer;//number of free cells of the buffer
92 Int_t fFlag; //0 read 1 write
93 Int_t fVerbose; //verbose level
94 fstream* fFile; //logical name of the I/O file
95 Int_t fMaskBackward; //bit mask for backward reading of a file
96 UInt_t fFilePosition;//'pointer' to the actual position in the file
97 UInt_t fFileEnd; //position of the last element of the file (File dimension)
98 UInt_t fDataHeaderPos;//Data header position
99 Int_t fEndingFillWords;//Few words at the end of the stream
100
5802cf2d 101 // Now the parameters for the mapping
102 const AliAltroMapping* fMapping; // Pointer to the mapping handler
103
3ea47630 104 ClassDef(AliAltroBuffer,0) // Interface to the Altro format
105};
106
107#endif