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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 | ||
19 | /** | |
20 | * @class AliHLTDataDeflaterSimple | |
21 | * Simple deflater implementation storing frequent values below a | |
22 | * maximum value with a reduced bit number and others with the full | |
23 | * number of bits. The reduced value is indicated by a preceeding '0' | |
24 | * and the full bit by '1'. The algorithm can be applied to data with an | |
25 | * occurrence distribution peaking close to zero and having less frequent | |
26 | * occurrence at higher values. | |
27 | * | |
28 | * @ingroup alihlt_base | |
29 | */ | |
30 | class AliHLTDataDeflaterSimple : public AliHLTDataDeflater | |
31 | { | |
32 | public: | |
33 | /// standard constructor | |
34 | AliHLTDataDeflaterSimple(); | |
35 | /// destructor | |
36 | ~AliHLTDataDeflaterSimple(); | |
37 | ||
ebf7a8e8 TB |
38 | /// @class AliHLTDataDeflaterParameter |
39 | // definition of parameters | |
80fb7693 | 40 | class AliHLTDataDeflaterParameter { |
41 | public: | |
42 | AliHLTDataDeflaterParameter() | |
43 | : fName(), fFullBitLength(0), fReducedBitLength(0) | |
44 | , fMax(0), fMaxReduced(0) | |
45 | , fMask(0), fMaskReduced(0) | |
46 | , fValueCount(0), fBitCount(0) {} | |
47 | ||
48 | AliHLTDataDeflaterParameter(const char* name, int length, int reduced) | |
49 | : fName(name), fFullBitLength(length), fReducedBitLength(reduced) | |
276ca921 | 50 | , fMax((((AliHLTUInt64_t)0x1)<<length)-1), fMaxReduced((((AliHLTUInt64_t)0x1)<<reduced)-1) |
a6968cb3 | 51 | , fMask(fMax), fMaskReduced(fMaxReduced) |
80fb7693 | 52 | , fValueCount(0), fBitCount(0) {} |
53 | ||
54 | AliHLTDataDeflaterParameter(const AliHLTDataDeflaterParameter& src) | |
55 | : fName(src.fName), fFullBitLength(src.fFullBitLength), fReducedBitLength(src.fReducedBitLength) | |
56 | , fMax(src.fMax), fMaxReduced(src.fMaxReduced) | |
57 | , fMask(src.fMask), fMaskReduced(src.fMaskReduced) | |
58 | , fValueCount(0), fBitCount(0) {} | |
59 | ||
60 | AliHLTDataDeflaterParameter& operator=(const AliHLTDataDeflaterParameter& src) { | |
5c8ae5fb | 61 | if (this==&src) return *this; |
80fb7693 | 62 | fName=src.fName; fFullBitLength=src.fFullBitLength; fReducedBitLength=src.fReducedBitLength; |
63 | fMax=src.fMax; fMaxReduced=src.fMaxReduced; | |
64 | fMask=src.fMask; fMaskReduced=src.fMaskReduced; | |
65 | fValueCount=src.fValueCount; fBitCount=src.fBitCount; | |
66 | return *this; | |
67 | } | |
68 | ||
69 | ~AliHLTDataDeflaterParameter() {} | |
70 | ||
71 | const char* GetName() const {return fName.c_str();} | |
72 | AliHLTUInt64_t Value(const AliHLTUInt64_t& value) const { | |
73 | return value>fMax?fMax:value; | |
74 | } | |
75 | AliHLTUInt32_t ValueLength(const AliHLTUInt64_t& value) const{ | |
76 | return value>fMaxReduced?fFullBitLength:fReducedBitLength; | |
77 | } | |
78 | AliHLTUInt32_t SwitchBit(const AliHLTUInt64_t& value) const { | |
79 | return value>fMaxReduced; | |
80 | } | |
81 | const int& GetBitLength() const {return fFullBitLength;} | |
82 | const int& GetReducedBitLength() const {return fReducedBitLength;} | |
83 | const AliHLTUInt64_t& GetMax() const {return fMax;} | |
84 | const AliHLTUInt64_t& GetMaxReduced() const {return fMaxReduced;} | |
85 | const AliHLTUInt64_t& GetMask() const {return fMask;} | |
86 | const AliHLTUInt64_t& GetReducedMask() const {return fMaskReduced;} | |
87 | ||
88 | const AliHLTUInt32_t& GetBitCount() const {return fBitCount;} | |
89 | const AliHLTUInt32_t& GetValueCount() const {return fValueCount;} | |
90 | void IncrementBitCount(const AliHLTUInt64_t& value) { | |
91 | fBitCount+=(value>fMaxReduced?fFullBitLength:fReducedBitLength)+1; | |
92 | fValueCount++; | |
93 | } | |
94 | void ResetBitCount() {fValueCount=0; fBitCount=0;} | |
95 | void Print(const char* option="") const; | |
96 | ||
97 | private: | |
98 | std::string fName; //! | |
99 | int fFullBitLength; //! | |
100 | int fReducedBitLength; //! | |
101 | AliHLTUInt64_t fMax; //! | |
102 | AliHLTUInt64_t fMaxReduced; //! | |
103 | AliHLTUInt64_t fMask; //! | |
104 | AliHLTUInt64_t fMaskReduced; //! | |
105 | AliHLTUInt32_t fValueCount; //! | |
106 | AliHLTUInt32_t fBitCount; //! | |
107 | }; | |
108 | ||
109 | /// add a parameter definition to the configuration, return reference id | |
a0d59d54 | 110 | int AddParameterDefinition(const char* name, int bitLength, int reducedBitLength); |
111 | ||
80fb7693 | 112 | /// inherited from AliHLTDataDeflater: write bit pattern according to configuration |
113 | virtual bool OutputParameterBits( int parameterId, AliHLTUInt64_t const & value ); | |
114 | ||
115 | /// clear the object and reset pointer references | |
116 | virtual void Clear(Option_t * /*option*/ =""); | |
117 | ||
118 | /// print info | |
119 | virtual void Print(Option_t *option="") const; | |
120 | ||
121 | /// print info | |
122 | virtual void Print(ostream& out, Option_t *option="") const; | |
123 | ||
f95bc7cd | 124 | /// DataDeflaterSimple has deflater version 1 |
125 | virtual int GetDeflaterVersion() const {return 1;} | |
126 | ||
80fb7693 | 127 | protected: |
128 | private: | |
a0d59d54 | 129 | /// copy constructor prohibited |
130 | AliHLTDataDeflaterSimple(const AliHLTDataDeflaterSimple&); | |
131 | /// assignment operator prohibited | |
132 | AliHLTDataDeflaterSimple& operator=(const AliHLTDataDeflaterSimple&); | |
133 | ||
80fb7693 | 134 | vector<AliHLTDataDeflaterParameter> fParameterDefinitions; //! |
135 | ||
136 | ClassDef(AliHLTDataDeflaterSimple, 0) | |
137 | }; | |
138 | ||
139 | ostream& operator<<(ostream &out, const AliHLTDataDeflaterSimple& me); | |
140 | ||
141 | #endif |