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1 | // $Id$ | |
2 | ||
3 | /************************************************************************** | |
4 | * This file is property of and copyright by the ALICE HLT Project * | |
5 | * ALICE Experiment at CERN, All rights reserved. * | |
6 | * * | |
7 | * Primary Authors: Matthias Richter <Matthias.Richter@ift.uib.no> * | |
8 | * Timm Steinbeck <timm@kip.uni-heidelberg.de> * | |
9 | * for The ALICE HLT Project. * | |
10 | * * | |
11 | * Permission to use, copy, modify and distribute this software and its * | |
12 | * documentation strictly for non-commercial purposes is hereby granted * | |
13 | * without fee, provided that the above copyright notice appears in all * | |
14 | * copies and that both the copyright notice and this permission notice * | |
15 | * appear in the supporting documentation. The authors make no claims * | |
16 | * about the suitability of this software for any purpose. It is * | |
17 | * provided "as is" without express or implied warranty. * | |
18 | **************************************************************************/ | |
19 | ||
20 | /** @file AliHLTDummyComponent.cxx | |
21 | @author Timm Steinbeck, Matthias Richter | |
22 | @date | |
23 | @brief A dummy processing component for the HLT. */ | |
24 | ||
25 | // see header file for class documentation | |
26 | // or | |
27 | // refer to README to build package | |
28 | // or | |
29 | // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt | |
30 | ||
31 | #include "AliHLTSystem.h" | |
32 | #include "AliHLTDummyComponent.h" | |
33 | #include "AliHLTDefinitions.h" | |
34 | #include <cstdlib> | |
35 | #include <cerrno> | |
36 | ||
37 | using namespace std; | |
38 | ||
39 | /** ROOT macro for the implementation of ROOT specific class methods */ | |
40 | ClassImp(AliHLTDummyComponent) | |
41 | ||
42 | AliHLTDummyComponent::AliHLTDummyComponent() | |
43 | : | |
44 | fOutputPercentage(100) // By default we copy to the output exactly what we got as input | |
45 | { | |
46 | // see header file for class documentation | |
47 | // or | |
48 | // refer to README to build package | |
49 | // or | |
50 | // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt | |
51 | } | |
52 | ||
53 | AliHLTDummyComponent::~AliHLTDummyComponent() | |
54 | { | |
55 | // see header file for class documentation | |
56 | } | |
57 | ||
58 | const char* AliHLTDummyComponent::GetComponentID() | |
59 | { | |
60 | // see header file for class documentation | |
61 | return "Dummy"; // The ID of this component | |
62 | } | |
63 | ||
64 | void AliHLTDummyComponent::GetInputDataTypes( vector<AliHLTComponentDataType>& list) | |
65 | { | |
66 | // see header file for class documentation | |
67 | list.push_back(kAliHLTAnyDataType); // We do not have any requirements for our input data type(s). | |
68 | ||
69 | } | |
70 | ||
71 | AliHLTComponentDataType AliHLTDummyComponent::GetOutputDataType() | |
72 | { | |
73 | // see header file for class documentation | |
74 | /* in order to be backward compatible we have to keep the old code, at | |
75 | * least for a while. Remember to use the new const kAliHLTVoidDataType | |
76 | * if you are using a more recent AliRoot version (from Jan 07) | |
77 | return kAliHLTVoidDataType; | |
78 | */ | |
79 | AliHLTComponentDataType dt = | |
80 | { sizeof(AliHLTComponentDataType), | |
81 | {'\0','\0','\0','0','\0','\0','\0','\0'}, | |
82 | {'\0','\0','\0','\0'}}; | |
83 | return dt; | |
84 | } | |
85 | ||
86 | void AliHLTDummyComponent::GetOutputDataSize( unsigned long& constBase, double& inputMultiplier ) | |
87 | { | |
88 | // see header file for class documentation | |
89 | constBase = 0; | |
90 | inputMultiplier = ((double)fOutputPercentage)/100.0; | |
91 | } | |
92 | ||
93 | ||
94 | ||
95 | // Spawn function, return new instance of this class | |
96 | AliHLTComponent* AliHLTDummyComponent::Spawn() | |
97 | { | |
98 | // see header file for class documentation | |
99 | return new AliHLTDummyComponent; | |
100 | } | |
101 | ||
102 | int AliHLTDummyComponent::DoInit( int argc, const char** argv ) | |
103 | { | |
104 | // perform initialization. We check whether our relative output size is specified in the arguments. | |
105 | fOutputPercentage = 100; | |
106 | int i = 0; | |
107 | char* cpErr; | |
108 | while ( i < argc ) | |
109 | { | |
110 | HLTDebug("argv[%d] == %s", i, argv[i] ); | |
111 | if ( !strcmp( argv[i], "output_percentage" ) || | |
112 | !strcmp( argv[i], "-output_percentage" )) | |
113 | { | |
114 | if ( i+1>=argc ) | |
115 | { | |
116 | HLTError("Missing output_percentage parameter"); | |
117 | return -EINVAL; | |
118 | } | |
119 | HLTDebug("argv[%d+1] == %s", i, argv[i+1] ); | |
120 | fOutputPercentage = strtoul( argv[i+1], &cpErr, 0 ); | |
121 | if ( *cpErr ) | |
122 | { | |
123 | HLTError("Cannot convert output_percentage parameter '%s'", argv[i+1] ); | |
124 | return -EINVAL; | |
125 | } | |
126 | HLTInfo("Output percentage set to %lu %%", fOutputPercentage ); | |
127 | i += 2; | |
128 | continue; | |
129 | } | |
130 | HLTError("Unknown option '%s'", argv[i] ); | |
131 | return -EINVAL; | |
132 | } | |
133 | return 0; | |
134 | } | |
135 | ||
136 | int AliHLTDummyComponent::DoDeinit() | |
137 | { | |
138 | // see header file for class documentation | |
139 | return 0; | |
140 | } | |
141 | ||
142 | int AliHLTDummyComponent::DoEvent( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks, | |
143 | AliHLTComponentTriggerData& /*trigData*/, AliHLTUInt8_t* outputPtr, | |
144 | AliHLTUInt32_t& size, vector<AliHLTComponentBlockData>& outputBlocks ) | |
145 | { | |
146 | // see header file for class documentation | |
147 | HLTInfo("Output percentage set to %lu %%", fOutputPercentage ); | |
148 | // Process an event | |
149 | unsigned long totalSize = 0; | |
150 | // Loop over all input blocks in the event | |
151 | for ( unsigned long n = 0; n < evtData.fBlockCnt; n++ ) | |
152 | { | |
153 | // Align the beginning of this block to the required value. | |
154 | if ( totalSize % kAliHLTBlockAlignment ) | |
155 | totalSize += kAliHLTBlockAlignment-(totalSize % kAliHLTBlockAlignment); | |
156 | if ( totalSize > size ) | |
157 | break; | |
158 | // Determine the size we should use for the output for this block (the input block's size times the relative output size) | |
159 | unsigned long mySize = (blocks[n].fSize * fOutputPercentage) / 100; | |
160 | HLTInfo("HLT::Dummy::DoEvent", "mySize set (1)", "mySize == %lu B - blocks[%lu].fSize == %lu - fOutputPercentage == %lu", | |
161 | mySize, n, blocks[n].fSize, fOutputPercentage ); | |
162 | // Check how much space we have left and adapt this output block's size accordingly. | |
163 | if ( totalSize + mySize > size ) | |
164 | mySize = size-totalSize; | |
165 | HLTInfo("HLT::Dummy::DoEvent", "mySize set (2)", "mySize == %lu B - totalSize == %lu - size == %lu", | |
166 | mySize, totalSize, size ); | |
167 | if ( mySize<=0 ) | |
168 | continue; // No room left to write a further block. | |
169 | // Now copy the input block | |
170 | unsigned long copied = 0; | |
171 | // First copy all full multiples of the input block | |
172 | while ( copied+blocks[n].fSize <= mySize ) | |
173 | { | |
174 | HLTInfo("Copying %lu B - Copied: %lu B - totalSize: %lu B", | |
175 | blocks[n].fSize, copied, totalSize ); | |
176 | memcpy( outputPtr+totalSize+copied, blocks[n].fPtr, blocks[n].fSize ); | |
177 | copied += blocks[n].fSize; | |
178 | } | |
179 | // And the copy the remaining fragment of the block | |
180 | HLTInfo("Copying %lu B - Copied: %lu B - totalSize: %lu B", | |
181 | mySize-copied, copied, totalSize ); | |
182 | memcpy( outputPtr+totalSize+copied, blocks[n].fPtr, mySize-copied ); | |
183 | HLTInfo("Copied: %lu B - totalSize: %lu B", | |
184 | copied, totalSize ); | |
185 | // Fill a block data structure for our output block. | |
186 | AliHLTComponentBlockData ob; | |
187 | // Let the structure be filled with the default values. | |
188 | // This takes care of setting the shared memory and data type values to default values, | |
189 | // so that they can be filled in by the calling code. | |
190 | FillBlockData( ob ); | |
191 | // This block's start (offset) is after all other blocks written so far | |
192 | ob.fOffset = totalSize; | |
193 | // the size of this block's data. | |
194 | ob.fSize = mySize; | |
195 | // the data type of this block | |
196 | ob.fDataType=blocks[n].fDataType; | |
197 | // The specification of the data is copied from the input block. | |
198 | ob.fSpecification = blocks[n].fSpecification; | |
199 | // The data type is set automatically to the component's specified output data type. | |
200 | // Place this block into the list of output blocks | |
201 | outputBlocks.push_back( ob ); | |
202 | // Increase the total amount of data written so far to our output memory | |
203 | totalSize += mySize; | |
204 | } | |
205 | // Finally we set the total size of output memory we consumed. | |
206 | size = totalSize; | |
207 | return 0; | |
208 | } |