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c9537879 | 1 | #ifndef AliHLTMUONDECISIONCOMPONENT_H |
2 | #define AliHLTMUONDECISIONCOMPONENT_H | |
3 | /* This file is property of and copyright by the ALICE HLT Project * | |
4 | * ALICE Experiment at CERN, All rights reserved. * | |
5 | * See cxx source for full Copyright notice */ | |
6 | ||
7 | /* $Id: $ */ | |
8 | ||
9 | /// | |
10 | /// @file AliHLTMUONDecisionComponent.h | |
11 | /// @author Artur Szostak <artursz@iafrica.com> | |
12 | /// @date 30 April 2008 | |
13 | /// @brief Declares the decision component for dimuon HLT triggering. | |
14 | /// | |
15 | ||
16 | #include "AliHLTProcessor.h" | |
17 | #include "AliHLTMUONDataTypes.h" | |
18 | #include <vector> | |
19 | ||
20 | #if __GNUC__ && __GNUC__ < 3 | |
21 | #define std | |
22 | #endif | |
23 | ||
24 | extern "C" struct AliHLTMUONMansoTrackStruct; | |
25 | extern "C" struct AliHLTMUONTrackDecisionStruct; | |
26 | extern "C" struct AliHLTMUONPairDecisionStruct; | |
27 | extern "C" struct AliHLTMUONSinglesDecisionBlockStruct; | |
28 | extern "C" struct AliHLTMUONPairsDecisionBlockStruct; | |
29 | ||
30 | ||
31 | /** | |
32 | * @class AliHLTMUONDecisionComponent | |
33 | * @brief Dimuon HLT trigger decision component. | |
34 | * | |
35 | * This class implements the dimuon HLT trigger decision component. | |
36 | * The dimuon trigger decision is generated by first applying two pT cuts to the | |
37 | * single tracks: a low cut for the J/psi family and a high cut for the upsilon | |
38 | * family. From the tracks that pass the cuts, we count them and build up some | |
39 | * statistics like the number of tracks passing the low or high pT cut. | |
40 | * The algorithm then looks at pairs of tracks and similarly counts the number | |
41 | * like sign or unlike sign pairs where both tracks passed the low or high pT cut | |
42 | * or pairs that did not pass any cuts. | |
43 | * At this point the invariant mass of the pairs is calculated and two mass cuts | |
44 | * are applied. The number of pairs that pass the low or high mass cut are then | |
45 | * counted. The results are encoded into two data blocks, one for trigger decisions | |
46 | * for single tracks and another for the track pairs. | |
47 | */ | |
48 | class AliHLTMUONDecisionComponent : public AliHLTProcessor | |
49 | { | |
50 | public: | |
51 | AliHLTMUONDecisionComponent(); | |
52 | virtual ~AliHLTMUONDecisionComponent(); | |
53 | ||
54 | // Public functions to implement the AliHLTProcessor interface. | |
55 | // These functions are required for the registration process. | |
56 | virtual const char* GetComponentID(); | |
57 | virtual void GetInputDataTypes(AliHLTComponentDataTypeList& list); | |
58 | virtual AliHLTComponentDataType GetOutputDataType(); | |
59 | virtual int GetOutputDataTypes(AliHLTComponentDataTypeList& list); | |
60 | virtual void GetOutputDataSize(unsigned long& constBase, double& inputMultiplier); | |
61 | virtual AliHLTComponent* Spawn(); | |
62 | ||
63 | protected: | |
64 | ||
65 | // Protected functions to implement the AliHLTProcessor interface. | |
66 | // These functions provide initialization as well as the actual processing | |
67 | // capabilities of the component. | |
68 | virtual int DoInit(int argc, const char** argv); | |
69 | virtual int DoDeinit(); | |
70 | virtual int Reconfigure(const char* cdbEntry, const char* componentId); | |
71 | virtual int DoEvent( | |
72 | const AliHLTComponentEventData& evtData, | |
73 | const AliHLTComponentBlockData* blocks, | |
74 | AliHLTComponentTriggerData& trigData, | |
75 | AliHLTUInt8_t* outputPtr, | |
76 | AliHLTUInt32_t& size, | |
77 | std::vector<AliHLTComponentBlockData>& outputBlocks | |
78 | ); | |
79 | ||
80 | using AliHLTProcessor::DoEvent; | |
81 | ||
82 | private: | |
83 | ||
84 | // Do not allow copying of this class. | |
85 | AliHLTMUONDecisionComponent(const AliHLTMUONDecisionComponent& /*obj*/); | |
86 | AliHLTMUONDecisionComponent& operator = (const AliHLTMUONDecisionComponent& /*obj*/); | |
87 | ||
88 | /** | |
89 | * Reads the cut parameters from the CDB. | |
90 | * \param path The relative CDB path to use for the CDB entry. | |
91 | * If NULL the default value is used. | |
92 | * \param setLowPtCut Indicates if the low pT cut should be set (default true). | |
93 | * \param setHighPtCut Indicates if the high pT cut should be set (default true). | |
94 | * \param setLowMassCut Indicates if the low invariant mass cut should be set (default true). | |
95 | * \param setHighMassCut Indicates if the high invariant mass cut should be set (default true). | |
96 | * \return 0 is returned on success and a non-zero value to indicate failure. | |
97 | */ | |
98 | int ReadConfigFromCDB( | |
99 | const char* path = NULL, | |
100 | bool setLowPtCut = true, bool setHighPtCut = true, | |
101 | bool setLowMassCut = true, bool setHighMassCut = true | |
102 | ); | |
103 | ||
104 | int AddTrack(const AliHLTMUONMansoTrackStruct* track); | |
105 | ||
106 | void ApplyTriggerAlgorithm( | |
107 | AliHLTMUONSinglesDecisionBlockStruct& singlesHeader, | |
108 | AliHLTMUONTrackDecisionStruct* singlesDecision, | |
109 | AliHLTMUONPairsDecisionBlockStruct& pairsHeader, | |
110 | AliHLTMUONPairDecisionStruct* pairsDecision | |
111 | ); | |
112 | ||
113 | AliHLTUInt32_t fMaxTracks; /// The maximum number of elements that can be stored in fTracks. | |
114 | AliHLTUInt32_t fTrackCount; /// The current number of elements stored in fTracks. | |
115 | const AliHLTMUONMansoTrackStruct** fTracks; /// Pointers to the track structures in input data blocks. | |
116 | AliHLTFloat32_t fLowPtCut; /// The low pT cut value to apply to tracks. [GeV/c] | |
117 | AliHLTFloat32_t fHighPtCut; /// The high pT cut value to apply to tracks. [GeV/c] | |
118 | AliHLTFloat32_t fLowMassCut; /// The low invariant mass cut value to apply to tracks. [GeV/c^2] | |
119 | AliHLTFloat32_t fHighMassCut; /// The high invariant mass cut value to apply to tracks. [GeV/c^2] | |
120 | bool fWarnForUnexpecedBlock; /// Flag indicating if we should log a warning if we got a block of an unexpected type. | |
121 | ||
122 | ClassDef(AliHLTMUONDecisionComponent, 0); // Trigger decision component for the dimuon HLT. | |
123 | }; | |
124 | ||
125 | #endif // AliHLTMUONDECISIONCOMPONENT_H |