3 /**************************************************************************
4 * This file is property of and copyright by the ALICE HLT Project *
5 * ALICE Experiment at CERN, All rights reserved. *
7 * Primary Authors: Matthias Richter <Matthias.Richter@ift.uib.no> *
8 * Timm Steinbeck <timm@kip.uni-heidelberg.de> *
9 * for The ALICE HLT Project. *
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 **************************************************************************/
20 /** @file AliHLTDummyComponent.cxx
21 @author Timm Steinbeck, Matthias Richter
23 @brief A dummy processing component for the HLT. */
25 // see header file for class documentation
27 // refer to README to build package
29 // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
35 #include "AliHLTSystem.h"
36 #include "AliHLTDummyComponent.h"
37 #include "AliHLTDefinitions.h"
41 /** ROOT macro for the implementation of ROOT specific class methods */
42 ClassImp(AliHLTDummyComponent)
44 AliHLTDummyComponent::AliHLTDummyComponent()
46 fOutputPercentage(100) // By default we copy to the output exactly what we got as input
48 // see header file for class documentation
50 // refer to README to build package
52 // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
55 AliHLTDummyComponent::~AliHLTDummyComponent()
57 // see header file for class documentation
60 const char* AliHLTDummyComponent::GetComponentID()
62 // see header file for class documentation
63 return "Dummy"; // The ID of this component
66 void AliHLTDummyComponent::GetInputDataTypes( vector<AliHLTComponentDataType>& list)
68 // see header file for class documentation
69 /* in order to be backward compatible we have to keep the old code, at
70 * least for a while. Remember to use the new const kAliHLTVoidDataType
71 * if you are using a more recent AliRoot version (from Jan 07)
72 list.push_back(kAliHLTAnyDataType); // We do not have any requirements for our input data type(s).
75 AliHLTComponentDataType dt =
76 { sizeof(AliHLTComponentDataType),
77 {'*','*','*','*','*','*','*','\0'},
82 AliHLTComponentDataType AliHLTDummyComponent::GetOutputDataType()
84 // see header file for class documentation
85 /* in order to be backward compatible we have to keep the old code, at
86 * least for a while. Remember to use the new const kAliHLTVoidDataType
87 * if you are using a more recent AliRoot version (from Jan 07)
88 return kAliHLTVoidDataType;
90 AliHLTComponentDataType dt =
91 { sizeof(AliHLTComponentDataType),
92 {'\0','\0','\0','0','\0','\0','\0','\0'},
93 {'\0','\0','\0','\0'}};
97 void AliHLTDummyComponent::GetOutputDataSize( unsigned long& constBase, double& inputMultiplier )
99 // see header file for class documentation
101 inputMultiplier = ((double)fOutputPercentage)/100.0;
106 // Spawn function, return new instance of this class
107 AliHLTComponent* AliHLTDummyComponent::Spawn()
109 // see header file for class documentation
110 return new AliHLTDummyComponent;
113 int AliHLTDummyComponent::DoInit( int argc, const char** argv )
115 // perform initialization. We check whether our relative output size is specified in the arguments.
116 fOutputPercentage = 100;
121 HLTDebug("argv[%d] == %s", i, argv[i] );
122 if ( !strcmp( argv[i], "output_percentage" ) ||
123 !strcmp( argv[i], "-output_percentage" ))
127 HLTError("Missing output_percentage parameter");
130 HLTDebug("argv[%d+1] == %s", i, argv[i+1] );
131 fOutputPercentage = strtoul( argv[i+1], &cpErr, 0 );
134 HLTError("Cannot convert output_percentage parameter '%s'", argv[i+1] );
137 HLTInfo("Output percentage set to %lu %%", fOutputPercentage );
141 HLTError("Unknown option '%s'", argv[i] );
147 int AliHLTDummyComponent::DoDeinit()
149 // see header file for class documentation
153 int AliHLTDummyComponent::DoEvent( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks,
154 AliHLTComponentTriggerData& /*trigData*/, AliHLTUInt8_t* outputPtr,
155 AliHLTUInt32_t& size, vector<AliHLTComponentBlockData>& outputBlocks )
157 // see header file for class documentation
158 HLTInfo("Output percentage set to %lu %%", fOutputPercentage );
160 unsigned long totalSize = 0;
161 // Loop over all input blocks in the event
162 for ( unsigned long n = 0; n < evtData.fBlockCnt; n++ )
164 // Align the beginning of this block to the required value.
165 if ( totalSize % kAliHLTBlockAlignment )
166 totalSize += kAliHLTBlockAlignment-(totalSize % kAliHLTBlockAlignment);
167 if ( totalSize > size )
169 // Determine the size we should use for the output for this block (the input block's size times the relative output size)
170 unsigned long mySize = (blocks[n].fSize * fOutputPercentage) / 100;
171 HLTInfo("HLT::Dummy::DoEvent", "mySize set (1)", "mySize == %lu B - blocks[%lu].fSize == %lu - fOutputPercentage == %lu",
172 mySize, n, blocks[n].fSize, fOutputPercentage );
173 // Check how much space we have left and adapt this output block's size accordingly.
174 if ( totalSize + mySize > size )
175 mySize = size-totalSize;
176 HLTInfo("HLT::Dummy::DoEvent", "mySize set (2)", "mySize == %lu B - totalSize == %lu - size == %lu",
177 mySize, totalSize, size );
179 continue; // No room left to write a further block.
180 // Now copy the input block
181 unsigned long copied = 0;
182 // First copy all full multiples of the input block
183 while ( copied+blocks[n].fSize <= mySize )
185 HLTInfo("Copying %lu B - Copied: %lu B - totalSize: %lu B",
186 blocks[n].fSize, copied, totalSize );
187 memcpy( outputPtr+totalSize+copied, blocks[n].fPtr, blocks[n].fSize );
188 copied += blocks[n].fSize;
190 // And the copy the remaining fragment of the block
191 HLTInfo("Copying %lu B - Copied: %lu B - totalSize: %lu B",
192 mySize-copied, copied, totalSize );
193 memcpy( outputPtr+totalSize+copied, blocks[n].fPtr, mySize-copied );
194 HLTInfo("Copied: %lu B - totalSize: %lu B",
196 // Fill a block data structure for our output block.
197 AliHLTComponentBlockData ob;
198 // Let the structure be filled with the default values.
199 // This takes care of setting the shared memory and data type values to default values,
200 // so that they can be filled in by the calling code.
202 // This block's start (offset) is after all other blocks written so far
203 ob.fOffset = totalSize;
204 // the size of this block's data.
206 // the data type of this block
207 ob.fDataType=blocks[n].fDataType;
208 // The specification of the data is copied from the input block.
209 ob.fSpecification = blocks[n].fSpecification;
210 // The data type is set automatically to the component's specified output data type.
211 // Place this block into the list of output blocks
212 outputBlocks.push_back( ob );
213 // Increase the total amount of data written so far to our output memory
216 // Finally we set the total size of output memory we consumed.