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9bf94558 | 1 | // -*- Mode: C++ -*- |
4b31e06b | 2 | // $Id$ |
9bf94558 | 3 | |
4 | #ifndef ALIHLTBLOCKFILTERCOMPONENT_H | |
5 | #define ALIHLTBLOCKFILTERCOMPONENT_H | |
4e8187d8 | 6 | //* This file is property of and copyright by the * |
a7ad9794 | 7 | //* ALICE Experiment at CERN, All rights reserved. * |
8 | //* See cxx source for full Copyright notice * | |
9bf94558 | 9 | |
4e8187d8 | 10 | /// @file AliHLTBlockFilterComponent.h |
11 | /// @author Matthias Richter | |
12 | /// @date | |
13 | /// @brief A simple data block filter and merger, merges block descriptors | |
14 | /// | |
9bf94558 | 15 | |
9bf94558 | 16 | #include "AliHLTProcessor.h" |
17 | ||
18 | /** | |
19 | * @class AliHLTBlockFilterComponent | |
20 | * A data block merger and filter. | |
21 | * It merges data block descriptors fulfilling the filtering rules and | |
22 | * forwards the descriptors to the output. The actual data is not touched. | |
a7ad9794 | 23 | * |
24 | * <h2>General properties:</h2> | |
25 | * | |
26 | * Component ID: \b BlockFilter <br> | |
27 | * Library: \b libAliHLTUtil.so <br> | |
28 | * Input Data Types: kAliHLTAnyDataType <br> | |
29 | * Output Data Types: according to parameter and input blocks <br> | |
30 | * | |
31 | * <h2>Mandatory arguments:</h2> | |
32 | * <!-- NOTE: ignore the \li. <i> and </i>: it's just doxygen formatting --> | |
33 | * | |
34 | * <h2>Optional arguments:</h2> | |
35 | * <!-- NOTE: ignore the \li. <i> and </i>: it's just doxygen formatting --> | |
36 | * \li -datatype <i> id origin </i> <br> | |
37 | * e.g. <tt> -datatype 'ESD_TREE' 'TPC ' </tt> <br> | |
38 | * \b Note: due to the 4-character data origin it might be necessary to | |
39 | * append a blank to the detectorname, e.g. <tt>TPC -> 'TPC '</tt> | |
40 | * | |
41 | * \li -origin <i> origin </i> <br> | |
42 | * e.g. -origin 'TPC ', \b Note: the filter rule has type id 'ANY' | |
43 | * | |
44 | * \li -typeid <i> id </i> <br> | |
45 | * e.g. -typeid ESD_TREE, \b Note: the filter rule has origin 'ANY' | |
46 | * | |
47 | * \li -dataspec <i> specification </i> <br> | |
48 | * data specification treated as decimal number or hex number if | |
49 | * prepended by '0x' | |
50 | * | |
6dc62e29 | 51 | * \li -prescalar <i> scalar </i> <br> |
52 | * a prescalar value, forwarding only if eventcount%scalar is zero | |
53 | * | |
54 | * \li -skip-events <i> count </i> <br> | |
55 | * skip count events in the beginning | |
56 | * | |
a7ad9794 | 57 | * \li -verbose <br> |
58 | * print out some more info messages, mainly for the sake of tutorials | |
59 | * | |
60 | * <h2>Configuration:</h2> | |
61 | * <!-- NOTE: ignore the \li. <i> and </i>: it's just doxygen formatting --> | |
62 | * Configuration by component arguments. | |
63 | * | |
64 | * <h2>Default CDB entries:</h2> | |
65 | * The component loads no CDB entries. | |
66 | * | |
67 | * <h2>Performance:</h2> | |
68 | * The component does not process any event data. | |
69 | * | |
70 | * <h2>Memory consumption:</h2> | |
71 | * The component does not process any event data. | |
72 | * | |
73 | * <h2>Output size:</h2> | |
74 | * No additional data is produced. Data blocks are just forwarded. | |
75 | * | |
76 | * By default, all blocks will be published. By means of the \em -datatype, | |
77 | * \em -origin, and \em -typeid arguments, the blocks can be selected. A list | |
78 | * of filter rules can be built up by multiple usage of the arguments. Each | |
79 | * time a new filter rule is added. | |
80 | * | |
81 | * No filtering by the data specification is applied unless then \em | |
82 | * -specification argument is used. The specification applies to to the | |
83 | * current filter rule, regardless of the sequence of -datatype/-specification | |
84 | * arguments. | |
85 | * | |
86 | * @ingroup alihlt_util_components | |
9bf94558 | 87 | */ |
88 | class AliHLTBlockFilterComponent : public AliHLTProcessor | |
89 | { | |
90 | public: | |
91 | /** standard constructor */ | |
92 | AliHLTBlockFilterComponent(); | |
93 | /** destructor */ | |
94 | virtual ~AliHLTBlockFilterComponent(); | |
95 | ||
96 | /** | |
97 | * The id of the component. | |
98 | * @return component id (string) | |
99 | */ | |
100 | virtual const char* GetComponentID() {return "BlockFilter";}; | |
101 | ||
102 | /** | |
103 | * Get the input data types of the component. | |
104 | * @return list of data types in the vector reference | |
105 | */ | |
106 | void GetInputDataTypes( AliHLTComponentDataTypeList& ); | |
107 | ||
108 | /** | |
109 | * Get the output data type of the component. | |
110 | * If @ref kAliHLTMultipleDataType is returned, the framework invokes | |
111 | * @ref GetOutputDataTypes. | |
112 | * @return output data type | |
113 | */ | |
114 | AliHLTComponentDataType GetOutputDataType(); | |
115 | ||
116 | /** | |
117 | * Get the output data types of the component. | |
118 | * The function can be implemented to indicate multiple output data types | |
119 | * in the target array. | |
120 | * @ref GetOutputDataType must return @ref kAliHLTMultipleDataType in order | |
121 | * to invoke this method. | |
122 | * @param tgtList list to receive the data types | |
123 | * @return no of output data types, data types in the target list | |
124 | */ | |
125 | int GetOutputDataTypes(AliHLTComponentDataTypeList& tgtList); | |
126 | ||
127 | /** | |
128 | * Get a ratio by how much the data volume is shrinked or enhanced. | |
129 | * @param constBase <i>return</i>: additive part, independent of the | |
130 | * input data volume | |
131 | * @param inputMultiplier <i>return</i>: multiplication ratio | |
132 | * @return values in the reference variables | |
133 | */ | |
134 | void GetOutputDataSize( unsigned long& constBase, double& inputMultiplier ); | |
135 | ||
136 | /** | |
137 | * Spawn function. | |
138 | * @return new class instance | |
139 | */ | |
140 | virtual AliHLTComponent* Spawn() {return new AliHLTBlockFilterComponent;} | |
141 | ||
142 | protected: | |
143 | ||
144 | /** | |
145 | * Data processing method for the component. | |
146 | * Filters the incoming data descriptors according to the rules and forwards | |
147 | * them into the output. | |
148 | * @return neg. error code if failed | |
149 | */ | |
150 | int DoEvent( const AliHLTComponentEventData& evtData, | |
151 | const AliHLTComponentBlockData* blocks, | |
152 | AliHLTComponentTriggerData& trigData, | |
153 | AliHLTUInt8_t* outputPtr, | |
154 | AliHLTUInt32_t& size, | |
155 | AliHLTComponentBlockDataList& outputBlocks ); | |
a8abc5d5 | 156 | |
157 | using AliHLTProcessor::DoEvent; | |
9bf94558 | 158 | |
159 | /** | |
160 | * Component initialisation and argument scan. | |
161 | */ | |
162 | int DoInit( int argc, const char** argv ); | |
163 | ||
164 | /** | |
165 | * Component cleanup. | |
166 | */ | |
167 | int DoDeinit(); | |
168 | ||
169 | private: | |
170 | /** copy constructor prohibited */ | |
171 | AliHLTBlockFilterComponent(const AliHLTBlockFilterComponent&); | |
172 | /** assignment operator prohibited */ | |
173 | AliHLTBlockFilterComponent& operator=(const AliHLTBlockFilterComponent&); | |
174 | ||
175 | /** | |
176 | * Check if the data block is selected by the filter rules. | |
177 | * @return 1 if selected | |
178 | */ | |
179 | int IsSelected(const AliHLTComponentBlockData& block); | |
180 | ||
181 | /** filtering rules, only the data type and specification members are use */ | |
182 | AliHLTComponentBlockDataList fFilterRules; //! transient | |
6dc62e29 | 183 | AliHLTUInt32_t fPrescalar; //! transient |
184 | AliHLTUInt32_t fFirstEvent; //! transient | |
9bf94558 | 185 | |
186 | ClassDef(AliHLTBlockFilterComponent, 0) | |
187 | }; | |
188 | #endif |