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6a1b3945 | 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: Thorsten Kollegger <kollegge@ikf.uni-frankfurt.de> * | |
8 | //* for The ALICE HLT Project. * | |
9 | //* * | |
10 | //* Permission to use, copy, modify and distribute this software and its * | |
11 | //* documentation strictly for non-commercial purposes is hereby granted * | |
12 | //* without fee, provided that the above copyright notice appears in all * | |
13 | //* copies and that both the copyright notice and this permission notice * | |
14 | //* appear in the supporting documentation. The authors make no claims * | |
15 | //* about the suitability of this software for any purpose. It is * | |
16 | //* provided "as is" without express or implied warranty. * | |
17 | //************************************************************************** | |
18 | ||
19 | /// @file AliHLTDataDeflaterHuffman.cxx | |
20 | /// @author Thorsten Kollegger, Matthias Richter | |
21 | /// @date 2011-08-10 | |
22 | /// @brief Deflater implementation using huffman code | |
23 | ||
24 | #include "AliHLTDataDeflaterHuffman.h" | |
25 | #include "AliHLTHuffman.h" | |
26 | #include "TObjArray.h" | |
27 | #include "TList.h" | |
28 | #include "TString.h" | |
29 | #include "TFile.h" | |
30 | #include <memory> | |
31 | #include <algorithm> | |
32 | #include <iostream> | |
33 | ||
34 | /** ROOT macro for the implementation of ROOT specific class methods */ | |
35 | ClassImp(AliHLTDataDeflaterHuffman) | |
36 | ||
37 | AliHLTDataDeflaterHuffman::AliHLTDataDeflaterHuffman(bool bTrainingMode) | |
38 | : AliHLTDataDeflater() | |
39 | , fHuffmanCoders() | |
40 | , fHuffmanCoderList(NULL) | |
41 | , fTrainingMode(bTrainingMode) | |
42 | { | |
43 | // see header file for class documentation | |
44 | // or | |
45 | // refer to README to build package | |
46 | // or | |
47 | // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt | |
48 | if (bTrainingMode) { | |
49 | HLTInfo("using DataDeflaterHuffman in training mode"); | |
50 | } | |
51 | } | |
52 | ||
53 | AliHLTDataDeflaterHuffman::~AliHLTDataDeflaterHuffman() | |
54 | { | |
55 | // destructor | |
56 | if (fHuffmanCoderList) delete fHuffmanCoderList; | |
57 | fHuffmanCoderList=NULL; | |
58 | ||
59 | Clear(); | |
60 | } | |
61 | ||
62 | int AliHLTDataDeflaterHuffman::AddParameterDefinition(const char* name, unsigned bitLength) | |
63 | { | |
64 | /// search a parameter definition in the decoder configuration, and set the index | |
65 | /// array, return reference id | |
66 | if (IsTrainingMode()) | |
67 | return AddTrainingParameter(name, bitLength); | |
68 | ||
69 | if (!name) return -EINVAL; | |
70 | if (!fHuffmanCoderList) return -ENODEV; | |
71 | TObject* pObj=fHuffmanCoderList->FindObject(name); | |
72 | if (!pObj) { | |
73 | HLTError("can not find decoder of id '%s'", name); | |
74 | return -ENOENT; | |
75 | } | |
76 | AliHLTHuffman* pHuffman=dynamic_cast<AliHLTHuffman*>(pObj); | |
77 | if (!pHuffman) { | |
78 | HLTError("object %s has wrong type, expected AliHLTHuffman", name); | |
79 | return -EBADF; | |
80 | } | |
81 | if (pHuffman->GetMaxBits()!=bitLength) { | |
82 | HLTError("mismatch in bitlengt: can not use decoder %s of length %d for encoding of %d bits", pHuffman->GetName(), pHuffman->GetMaxBits(), bitLength); | |
83 | return -EPERM; | |
84 | } | |
85 | ||
86 | fHuffmanCoders.push_back(pHuffman); | |
87 | return fHuffmanCoders.size()-1; | |
88 | } | |
89 | ||
90 | int AliHLTDataDeflaterHuffman::InitDecoders(TList* decoderlist) | |
91 | { | |
92 | /// init list of decoders | |
93 | /// expects to be an external pointer, valid throughout the livetime of | |
94 | /// the instance | |
95 | if (!decoderlist) return -EINVAL; | |
96 | if (!fHuffmanCoderList) { | |
97 | fHuffmanCoderList=new TList; | |
98 | } else { | |
99 | if (fHuffmanCoderList->GetEntries()>0 && fHuffmanCoderList->IsOwner()) { | |
100 | HLTWarning("list of decoders owns already %d object(s), but disabling ownership now because of new external pointers"); | |
101 | } | |
102 | } | |
103 | if (!fHuffmanCoderList) return -ENOMEM; | |
104 | fHuffmanCoderList->SetOwner(kFALSE); | |
105 | TIter next(decoderlist); | |
106 | TObject* pObj=NULL; | |
107 | while ((pObj=next())!=NULL) { | |
108 | if (dynamic_cast<AliHLTHuffman*>(pObj)==NULL) continue; | |
109 | if (fHuffmanCoderList->FindObject(pObj->GetName())) { | |
110 | HLTError("duplicate entry of name '%s'", pObj->GetName()); | |
111 | return -EEXIST; | |
112 | } | |
113 | fHuffmanCoderList->Add(pObj); | |
114 | } | |
115 | ||
116 | return fHuffmanCoderList->GetEntries(); | |
117 | } | |
118 | ||
119 | bool AliHLTDataDeflaterHuffman::OutputParameterBits( int memberId, AliHLTUInt64_t const & value ) | |
120 | { | |
121 | // write huffman encoded bit pattern of a member to the current byte and position | |
122 | if (IsTrainingMode()) | |
123 | return AddTrainingValue(memberId, value); | |
124 | ||
125 | if (memberId>=(int)fHuffmanCoders.size()) { | |
126 | return false; | |
127 | } | |
128 | ||
129 | AliHLTUInt64_t length = 0; | |
130 | const std::bitset<64>& v=fHuffmanCoders[memberId]->Encode((value>fHuffmanCoders[memberId]->GetMaxValue())?fHuffmanCoders[memberId]->GetMaxValue():value, length); | |
131 | if (length>0) { | |
132 | return OutputBits(v, length); | |
133 | } | |
134 | return false; | |
135 | } | |
136 | ||
137 | int AliHLTDataDeflaterHuffman::AddTrainingParameter(const char* name, unsigned bitLength) | |
138 | { | |
139 | /// add a parameter definition for huffman training | |
140 | ||
141 | /// returns index in the array | |
142 | if (!fHuffmanCoderList) { | |
143 | fHuffmanCoderList=new TList; | |
144 | if (!fHuffmanCoderList) return -ENOMEM; | |
145 | // always set ownership for the new list since it is supposed to | |
146 | // contain only internal pointers | |
147 | fHuffmanCoderList->SetOwner(); | |
148 | } else if (!fHuffmanCoderList->IsOwner()) { | |
149 | // not sure about the pointers which are already in the list | |
150 | if (fHuffmanCoderList->GetEntries()>0) { | |
151 | HLTWarning("skip setting ownership because list contains already %d object(s), possible memory leak at cleanup"); | |
152 | } else { | |
153 | fHuffmanCoderList->SetOwner(); | |
154 | } | |
155 | } | |
156 | AliHLTHuffman* pHuffman=new AliHLTHuffman(name, bitLength); | |
157 | if (!pHuffman) return -ENOMEM; | |
158 | fHuffmanCoderList->Add(pHuffman); | |
159 | ||
160 | fHuffmanCoders.push_back(pHuffman); | |
161 | return fHuffmanCoders.size()-1; | |
162 | } | |
163 | ||
164 | bool AliHLTDataDeflaterHuffman::AddTrainingValue( int memberId, AliHLTUInt64_t const & value ) | |
165 | { | |
166 | /// add a training value for the specified parameter | |
167 | if (memberId>=(int)fHuffmanCoders.size()) { | |
168 | return false; | |
169 | } | |
170 | return fHuffmanCoders[memberId]->AddTrainingValue(value); | |
171 | } | |
172 | ||
173 | const TList* AliHLTDataDeflaterHuffman::GenerateHuffmanTree() | |
174 | { | |
175 | /// generate the huffman tree | |
176 | for (unsigned i=0; i<fHuffmanCoders.size(); i++) { | |
177 | if (!fHuffmanCoders[i]->GenerateHuffmanTree()) { | |
178 | HLTError("failed to generate huffman tree for parameter %s", fHuffmanCoders[i]->GetName()); | |
179 | } | |
180 | } | |
181 | return fHuffmanCoderList; | |
182 | } | |
183 | ||
184 | void AliHLTDataDeflaterHuffman::Clear(Option_t * option) | |
185 | { | |
186 | // internal cleanup | |
187 | ||
188 | AliHLTDataDeflater::Clear(option); | |
189 | } | |
190 | ||
191 | void AliHLTDataDeflaterHuffman::Print(Option_t *option) const | |
192 | { | |
193 | // print info | |
194 | Print(cout, option); | |
195 | } | |
196 | ||
197 | void AliHLTDataDeflaterHuffman::Print(ostream& out, Option_t * /*option*/) const | |
198 | { | |
199 | // print to stream | |
200 | out << "AliHLTDataDeflaterHuffman:" << endl; | |
201 | for (vector<AliHLTHuffman*>::const_iterator it=fHuffmanCoders.begin(); | |
202 | it!=fHuffmanCoders.end(); it++) { | |
203 | (*it)->Print("short"); cout << endl; | |
204 | } | |
205 | if (fHuffmanCoders.size()==0 && fHuffmanCoderList && fHuffmanCoderList->GetEntries()>0) { | |
206 | TIter next(fHuffmanCoderList); | |
207 | TObject* pObj=NULL; | |
208 | while ((pObj=next())) { | |
209 | pObj->Print("short"); cout << endl; | |
210 | } | |
211 | } | |
212 | } | |
213 | ||
214 | TObject *AliHLTDataDeflaterHuffman::FindObject(const char *name) const | |
215 | { | |
216 | /// find object: 'DeflaterConfiguration' | |
217 | if (strcmp(name, "DeflaterConfiguration")==0) { | |
218 | for (unsigned i=0; i<fHuffmanCoders.size(); i++) { | |
219 | if (!fHuffmanCoders[i]->GenerateHuffmanTree()) { | |
220 | HLTError("generation of huffman tree for parameter '%s' failed", fHuffmanCoders[i]->GetName()); | |
221 | } | |
222 | } | |
223 | ||
224 | return fHuffmanCoderList; | |
225 | } | |
226 | ||
227 | return NULL; | |
228 | } | |
229 | ||
230 | void AliHLTDataDeflaterHuffman::SaveAs(const char *filename, Option_t *option) const | |
231 | { | |
232 | /// save data according to option | |
233 | TString remainingOptions; | |
234 | bool bWriteHuffmanConf=false; // write the huffman configuration | |
235 | TString strOption(option); | |
236 | std::auto_ptr<TObjArray> tokens(strOption.Tokenize(" ")); | |
237 | if (tokens.get()) { | |
238 | for (int i=0; i<tokens->GetEntriesFast(); i++) { | |
239 | if (!tokens->At(i)) continue; | |
240 | const char* key=""; | |
241 | TString arg=tokens->At(i)->GetName(); | |
242 | ||
243 | key="huffmanconf"; | |
244 | if (arg.BeginsWith(key)) { | |
245 | bWriteHuffmanConf=true; | |
246 | continue; | |
247 | } | |
248 | ||
249 | if (!remainingOptions.IsNull()) remainingOptions+=" "; | |
250 | remainingOptions+=arg; | |
251 | } | |
252 | } | |
253 | ||
254 | if (bWriteHuffmanConf) { | |
255 | std::auto_ptr<TFile> output(TFile::Open(filename, "RECREATE")); | |
256 | if (!output.get() || output->IsZombie()) { | |
257 | HLTError("can not open file %s from writing", filename); | |
258 | return; | |
259 | } | |
260 | ||
261 | if (!fHuffmanCoderList || fHuffmanCoderList->GetEntries()==0) { | |
262 | HLTError("no huffman instances available for writing"); | |
263 | return; | |
264 | } | |
265 | ||
266 | for (unsigned i=0; i<fHuffmanCoders.size(); i++) { | |
267 | if (!fHuffmanCoders[i]->GenerateHuffmanTree()) { | |
268 | HLTError("generation of huffman tree for parameter '%s' failed", fHuffmanCoders[i]->GetName()); | |
269 | } | |
270 | } | |
271 | ||
272 | output->cd(); | |
273 | fHuffmanCoderList->Write("DeflaterConfiguration", TObject::kSingleKey); | |
274 | output->Close(); | |
275 | } | |
276 | ||
277 | return AliHLTDataDeflater::SaveAs(remainingOptions); | |
278 | } | |
279 | ||
280 | ostream& operator<<(ostream &out, const AliHLTDataDeflaterHuffman& me) | |
281 | { | |
282 | me.Print(out); | |
283 | return out; | |
284 | } | |
285 |