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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 | #if __GNUC__ >= 3 | |
32 | using namespace std; | |
33 | #endif | |
34 | ||
35 | #include "AliHLTSystem.h" | |
36 | #include "AliHLTDummyComponent.h" | |
37 | #include "AliHLTDefinitions.h" | |
38 | #include <cstdlib> | |
39 | #include <cerrno> | |
40 | ||
41 | /** ROOT macro for the implementation of ROOT specific class methods */ | |
42 | ClassImp(AliHLTDummyComponent) | |
43 | ||
44 | AliHLTDummyComponent::AliHLTDummyComponent() | |
45 | : | |
46 | fOutputPercentage(100) // By default we copy to the output exactly what we got as input | |
47 | { | |
48 | // see header file for class documentation | |
49 | // or | |
50 | // refer to README to build package | |
51 | // or | |
52 | // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt | |
53 | } | |
54 | ||
55 | AliHLTDummyComponent::~AliHLTDummyComponent() | |
56 | { | |
57 | // see header file for class documentation | |
58 | } | |
59 | ||
60 | const char* AliHLTDummyComponent::GetComponentID() | |
61 | { | |
62 | // see header file for class documentation | |
63 | return "Dummy"; // The ID of this component | |
64 | } | |
65 | ||
66 | void AliHLTDummyComponent::GetInputDataTypes( vector<AliHLTComponentDataType>& list) | |
67 | { | |
68 | // see header file for class documentation | |
69 | list.push_back(kAliHLTAnyDataType); // We do not have any requirements for our input data type(s). | |
70 | ||
71 | } | |
72 | ||
73 | AliHLTComponentDataType AliHLTDummyComponent::GetOutputDataType() | |
74 | { | |
75 | // see header file for class documentation | |
76 | /* in order to be backward compatible we have to keep the old code, at | |
77 | * least for a while. Remember to use the new const kAliHLTVoidDataType | |
78 | * if you are using a more recent AliRoot version (from Jan 07) | |
79 | return kAliHLTVoidDataType; | |
80 | */ | |
81 | AliHLTComponentDataType dt = | |
82 | { sizeof(AliHLTComponentDataType), | |
83 | {'\0','\0','\0','0','\0','\0','\0','\0'}, | |
84 | {'\0','\0','\0','\0'}}; | |
85 | return dt; | |
86 | } | |
87 | ||
88 | void AliHLTDummyComponent::GetOutputDataSize( unsigned long& constBase, double& inputMultiplier ) | |
89 | { | |
90 | // see header file for class documentation | |
91 | constBase = 0; | |
92 | inputMultiplier = ((double)fOutputPercentage)/100.0; | |
93 | } | |
94 | ||
95 | ||
96 | ||
97 | // Spawn function, return new instance of this class | |
98 | AliHLTComponent* AliHLTDummyComponent::Spawn() | |
99 | { | |
100 | // see header file for class documentation | |
101 | return new AliHLTDummyComponent; | |
102 | } | |
103 | ||
104 | int AliHLTDummyComponent::DoInit( int argc, const char** argv ) | |
105 | { | |
106 | // perform initialization. We check whether our relative output size is specified in the arguments. | |
107 | fOutputPercentage = 100; | |
108 | int i = 0; | |
109 | char* cpErr; | |
110 | while ( i < argc ) | |
111 | { | |
112 | HLTDebug("argv[%d] == %s", i, argv[i] ); | |
113 | if ( !strcmp( argv[i], "output_percentage" ) || | |
114 | !strcmp( argv[i], "-output_percentage" )) | |
115 | { | |
116 | if ( i+1>=argc ) | |
117 | { | |
118 | HLTError("Missing output_percentage parameter"); | |
119 | return -EINVAL; | |
120 | } | |
121 | HLTDebug("argv[%d+1] == %s", i, argv[i+1] ); | |
122 | fOutputPercentage = strtoul( argv[i+1], &cpErr, 0 ); | |
123 | if ( *cpErr ) | |
124 | { | |
125 | HLTError("Cannot convert output_percentage parameter '%s'", argv[i+1] ); | |
126 | return -EINVAL; | |
127 | } | |
128 | HLTInfo("Output percentage set to %lu %%", fOutputPercentage ); | |
129 | i += 2; | |
130 | continue; | |
131 | } | |
132 | HLTError("Unknown option '%s'", argv[i] ); | |
133 | return -EINVAL; | |
134 | } | |
135 | return 0; | |
136 | } | |
137 | ||
138 | int AliHLTDummyComponent::DoDeinit() | |
139 | { | |
140 | // see header file for class documentation | |
141 | return 0; | |
142 | } | |
143 | ||
144 | int AliHLTDummyComponent::DoEvent( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks, | |
145 | AliHLTComponentTriggerData& /*trigData*/, AliHLTUInt8_t* outputPtr, | |
146 | AliHLTUInt32_t& size, vector<AliHLTComponentBlockData>& outputBlocks ) | |
147 | { | |
148 | // see header file for class documentation | |
149 | HLTInfo("Output percentage set to %lu %%", fOutputPercentage ); | |
150 | // Process an event | |
151 | unsigned long totalSize = 0; | |
152 | // Loop over all input blocks in the event | |
153 | for ( unsigned long n = 0; n < evtData.fBlockCnt; n++ ) | |
154 | { | |
155 | // Align the beginning of this block to the required value. | |
156 | if ( totalSize % kAliHLTBlockAlignment ) | |
157 | totalSize += kAliHLTBlockAlignment-(totalSize % kAliHLTBlockAlignment); | |
158 | if ( totalSize > size ) | |
159 | break; | |
160 | // Determine the size we should use for the output for this block (the input block's size times the relative output size) | |
161 | unsigned long mySize = (blocks[n].fSize * fOutputPercentage) / 100; | |
162 | HLTInfo("HLT::Dummy::DoEvent", "mySize set (1)", "mySize == %lu B - blocks[%lu].fSize == %lu - fOutputPercentage == %lu", | |
163 | mySize, n, blocks[n].fSize, fOutputPercentage ); | |
164 | // Check how much space we have left and adapt this output block's size accordingly. | |
165 | if ( totalSize + mySize > size ) | |
166 | mySize = size-totalSize; | |
167 | HLTInfo("HLT::Dummy::DoEvent", "mySize set (2)", "mySize == %lu B - totalSize == %lu - size == %lu", | |
168 | mySize, totalSize, size ); | |
169 | if ( mySize<=0 ) | |
170 | continue; // No room left to write a further block. | |
171 | // Now copy the input block | |
172 | unsigned long copied = 0; | |
173 | // First copy all full multiples of the input block | |
174 | while ( copied+blocks[n].fSize <= mySize ) | |
175 | { | |
176 | HLTInfo("Copying %lu B - Copied: %lu B - totalSize: %lu B", | |
177 | blocks[n].fSize, copied, totalSize ); | |
178 | memcpy( outputPtr+totalSize+copied, blocks[n].fPtr, blocks[n].fSize ); | |
179 | copied += blocks[n].fSize; | |
180 | } | |
181 | // And the copy the remaining fragment of the block | |
182 | HLTInfo("Copying %lu B - Copied: %lu B - totalSize: %lu B", | |
183 | mySize-copied, copied, totalSize ); | |
184 | memcpy( outputPtr+totalSize+copied, blocks[n].fPtr, mySize-copied ); | |
185 | HLTInfo("Copied: %lu B - totalSize: %lu B", | |
186 | copied, totalSize ); | |
187 | // Fill a block data structure for our output block. | |
188 | AliHLTComponentBlockData ob; | |
189 | // Let the structure be filled with the default values. | |
190 | // This takes care of setting the shared memory and data type values to default values, | |
191 | // so that they can be filled in by the calling code. | |
192 | FillBlockData( ob ); | |
193 | // This block's start (offset) is after all other blocks written so far | |
194 | ob.fOffset = totalSize; | |
195 | // the size of this block's data. | |
196 | ob.fSize = mySize; | |
197 | // the data type of this block | |
198 | ob.fDataType=blocks[n].fDataType; | |
199 | // The specification of the data is copied from the input block. | |
200 | ob.fSpecification = blocks[n].fSpecification; | |
201 | // The data type is set automatically to the component's specified output data type. | |
202 | // Place this block into the list of output blocks | |
203 | outputBlocks.push_back( ob ); | |
204 | // Increase the total amount of data written so far to our output memory | |
205 | totalSize += mySize; | |
206 | } | |
207 | // Finally we set the total size of output memory we consumed. | |
208 | size = totalSize; | |
209 | return 0; | |
210 | } |