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80fb7693 | 1 | //-*- Mode: C++ -*- |
2 | // $Id$ | |
3 | #ifndef ALIHLTDATADEFLATERSIMPLE_H | |
4 | #define ALIHLTDATADEFLATERSIMPLE_H | |
5 | //* This file is property of and copyright by the ALICE HLT Project * | |
6 | //* ALICE Experiment at CERN, All rights reserved. * | |
7 | //* See cxx source for full Copyright notice * | |
8 | ||
9 | /// @file AliHLTDataDeflaterSimple.h | |
10 | /// @author Matthias Richter | |
11 | /// @date 2011-08-10 | |
12 | /// @brief Data deflater class storing only necessary bits | |
13 | /// @note Code original from AliHLTTPCCompModelDeflater | |
14 | ||
15 | #include "AliHLTDataDeflater.h" | |
16 | #include <vector> | |
17 | #include <string> | |
18 | ||
a0d59d54 | 19 | class TObjArray; |
20 | class TH1; | |
21 | ||
80fb7693 | 22 | /** |
23 | * @class AliHLTDataDeflaterSimple | |
24 | * Simple deflater implementation storing frequent values below a | |
25 | * maximum value with a reduced bit number and others with the full | |
26 | * number of bits. The reduced value is indicated by a preceeding '0' | |
27 | * and the full bit by '1'. The algorithm can be applied to data with an | |
28 | * occurrence distribution peaking close to zero and having less frequent | |
29 | * occurrence at higher values. | |
30 | * | |
31 | * @ingroup alihlt_base | |
32 | */ | |
33 | class AliHLTDataDeflaterSimple : public AliHLTDataDeflater | |
34 | { | |
35 | public: | |
36 | /// standard constructor | |
37 | AliHLTDataDeflaterSimple(); | |
38 | /// destructor | |
39 | ~AliHLTDataDeflaterSimple(); | |
40 | ||
41 | /// @class AliHLTDataDeflaterParameter definition of parameters | |
42 | class AliHLTDataDeflaterParameter { | |
43 | public: | |
44 | AliHLTDataDeflaterParameter() | |
45 | : fName(), fFullBitLength(0), fReducedBitLength(0) | |
46 | , fMax(0), fMaxReduced(0) | |
47 | , fMask(0), fMaskReduced(0) | |
48 | , fValueCount(0), fBitCount(0) {} | |
49 | ||
50 | AliHLTDataDeflaterParameter(const char* name, int length, int reduced) | |
51 | : fName(name), fFullBitLength(length), fReducedBitLength(reduced) | |
276ca921 | 52 | , fMax((((AliHLTUInt64_t)0x1)<<length)-1), fMaxReduced((((AliHLTUInt64_t)0x1)<<reduced)-1) |
a6968cb3 | 53 | , fMask(fMax), fMaskReduced(fMaxReduced) |
80fb7693 | 54 | , fValueCount(0), fBitCount(0) {} |
55 | ||
56 | AliHLTDataDeflaterParameter(const AliHLTDataDeflaterParameter& src) | |
57 | : fName(src.fName), fFullBitLength(src.fFullBitLength), fReducedBitLength(src.fReducedBitLength) | |
58 | , fMax(src.fMax), fMaxReduced(src.fMaxReduced) | |
59 | , fMask(src.fMask), fMaskReduced(src.fMaskReduced) | |
60 | , fValueCount(0), fBitCount(0) {} | |
61 | ||
62 | AliHLTDataDeflaterParameter& operator=(const AliHLTDataDeflaterParameter& src) { | |
5c8ae5fb | 63 | if (this==&src) return *this; |
80fb7693 | 64 | fName=src.fName; fFullBitLength=src.fFullBitLength; fReducedBitLength=src.fReducedBitLength; |
65 | fMax=src.fMax; fMaxReduced=src.fMaxReduced; | |
66 | fMask=src.fMask; fMaskReduced=src.fMaskReduced; | |
67 | fValueCount=src.fValueCount; fBitCount=src.fBitCount; | |
68 | return *this; | |
69 | } | |
70 | ||
71 | ~AliHLTDataDeflaterParameter() {} | |
72 | ||
73 | const char* GetName() const {return fName.c_str();} | |
74 | AliHLTUInt64_t Value(const AliHLTUInt64_t& value) const { | |
75 | return value>fMax?fMax:value; | |
76 | } | |
77 | AliHLTUInt32_t ValueLength(const AliHLTUInt64_t& value) const{ | |
78 | return value>fMaxReduced?fFullBitLength:fReducedBitLength; | |
79 | } | |
80 | AliHLTUInt32_t SwitchBit(const AliHLTUInt64_t& value) const { | |
81 | return value>fMaxReduced; | |
82 | } | |
83 | const int& GetBitLength() const {return fFullBitLength;} | |
84 | const int& GetReducedBitLength() const {return fReducedBitLength;} | |
85 | const AliHLTUInt64_t& GetMax() const {return fMax;} | |
86 | const AliHLTUInt64_t& GetMaxReduced() const {return fMaxReduced;} | |
87 | const AliHLTUInt64_t& GetMask() const {return fMask;} | |
88 | const AliHLTUInt64_t& GetReducedMask() const {return fMaskReduced;} | |
89 | ||
90 | const AliHLTUInt32_t& GetBitCount() const {return fBitCount;} | |
91 | const AliHLTUInt32_t& GetValueCount() const {return fValueCount;} | |
92 | void IncrementBitCount(const AliHLTUInt64_t& value) { | |
93 | fBitCount+=(value>fMaxReduced?fFullBitLength:fReducedBitLength)+1; | |
94 | fValueCount++; | |
95 | } | |
96 | void ResetBitCount() {fValueCount=0; fBitCount=0;} | |
97 | void Print(const char* option="") const; | |
98 | ||
99 | private: | |
100 | std::string fName; //! | |
101 | int fFullBitLength; //! | |
102 | int fReducedBitLength; //! | |
103 | AliHLTUInt64_t fMax; //! | |
104 | AliHLTUInt64_t fMaxReduced; //! | |
105 | AliHLTUInt64_t fMask; //! | |
106 | AliHLTUInt64_t fMaskReduced; //! | |
107 | AliHLTUInt32_t fValueCount; //! | |
108 | AliHLTUInt32_t fBitCount; //! | |
109 | }; | |
110 | ||
111 | /// add a parameter definition to the configuration, return reference id | |
a0d59d54 | 112 | int AddParameterDefinition(const char* name, int bitLength, int reducedBitLength); |
113 | ||
114 | /// add a histogram for deflater statistic of the corresponding parameter | |
115 | int AddHistogram(TH1* h); | |
80fb7693 | 116 | |
117 | /// inherited from AliHLTDataDeflater: write bit pattern according to configuration | |
118 | virtual bool OutputParameterBits( int parameterId, AliHLTUInt64_t const & value ); | |
119 | ||
120 | /// clear the object and reset pointer references | |
121 | virtual void Clear(Option_t * /*option*/ =""); | |
122 | ||
123 | /// print info | |
124 | virtual void Print(Option_t *option="") const; | |
125 | ||
126 | /// print info | |
127 | virtual void Print(ostream& out, Option_t *option="") const; | |
128 | ||
02406b80 | 129 | /// save data according to option |
a0d59d54 | 130 | virtual void SaveAs(const char *filename="",Option_t *option="") const; |
131 | ||
f95bc7cd | 132 | /// DataDeflaterSimple has deflater version 1 |
133 | virtual int GetDeflaterVersion() const {return 1;} | |
134 | ||
709053b2 | 135 | static float CalcEntropy(TH1* histo, const char* option="", int mode=0); |
136 | ||
80fb7693 | 137 | protected: |
138 | private: | |
a0d59d54 | 139 | /// copy constructor prohibited |
140 | AliHLTDataDeflaterSimple(const AliHLTDataDeflaterSimple&); | |
141 | /// assignment operator prohibited | |
142 | AliHLTDataDeflaterSimple& operator=(const AliHLTDataDeflaterSimple&); | |
143 | ||
80fb7693 | 144 | vector<AliHLTDataDeflaterParameter> fParameterDefinitions; //! |
145 | ||
a0d59d54 | 146 | TObjArray* fHistograms; //! list of histograms for parameters |
147 | ||
80fb7693 | 148 | ClassDef(AliHLTDataDeflaterSimple, 0) |
149 | }; | |
150 | ||
151 | ostream& operator<<(ostream &out, const AliHLTDataDeflaterSimple& me); | |
152 | ||
153 | #endif |