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2e9f335b 1/**************************************************************************
2 * Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
9f992f70 15
30c1018e 16/* $Id$ */
a79660fb 17
9f992f70 18
a79660fb 19// This class contains the implementation of the
20// compression and decompression algorithms
21// Compression is performed reading the Altro data block (called packet) backward.
22// Similarly decompression is also done backward so that the final file is restored
23// after the compression and decompression phase.
24
146d2dbf 25#include <stdlib.h>
2e9f335b 26#include <TObjArray.h>
27#include "Riostream.h"
0f0615a3 28#include "TMath.h"
2e9f335b 29#include "AliTPCCompression.h"
30#include "AliTPCBuffer160.h"
31#include "AliTPCHuffman.h"
32
33ClassImp(AliTPCCompression)
34//////////////////////////////////////////////////////////////////////////////////////////////////
35AliTPCCompression::AliTPCCompression(){
a79660fb 36 //Defaul constructor
2e9f335b 37 fDimBuffer=sizeof(ULong_t)*8;
38 fFreeBitsBuffer=fDimBuffer;
39 fReadBits=0;
40 fPos=0;
41 fBuffer=0;
42 fVerbose=0;
43 fFillWords=0;
44 return;
45}
46//////////////////////////////////////////////////////////////////////////////////////////////////
47AliTPCCompression::AliTPCCompression(const AliTPCCompression &source){
a79660fb 48 //Constructor
2e9f335b 49 this->fDimBuffer=source.fDimBuffer;
50 this->fFreeBitsBuffer=source.fFreeBitsBuffer;
51 this->fReadBits=source.fReadBits;
52 this->fPos=source.fPos;
53 this->fBuffer=source.fBuffer;
54 this->fVerbose=source.fVerbose;
55 this->fFillWords=source.fFillWords;
56 return;
57}
58//////////////////////////////////////////////////////////////////////////////////////////////////
59AliTPCCompression& AliTPCCompression::operator=(const AliTPCCompression &source){
a79660fb 60 //Redefinition of the assignment operator
2e9f335b 61 this->fDimBuffer=source.fDimBuffer;
62 this->fFreeBitsBuffer=source.fFreeBitsBuffer;
63 this->fReadBits=source.fReadBits;
64 this->fPos=source.fPos;
65 this->fBuffer=source.fBuffer;
66 this->fVerbose=source.fVerbose;
67 this->fFillWords=source.fFillWords;
68 return *this;
69}
70//////////////////////////////////////////////////////////////////////////////////////////////////
a79660fb 71void AliTPCCompression::NextTable(Int_t Val,Int_t &NextTableType,Int_t &BunchLen,Int_t &Count)const{
72 //Depending on the data type (5 types of data) a specific table is called
2e9f335b 73 /*
74 Table index:
75 0==> Bunch length value
76 1==> Time Bin value
77 2==> 1-samples bunch
78 3==> Central samples
79 4==> Border samples
80 */
81 switch (NextTableType){
82 case 0:{
83 BunchLen=Val-2;
84 NextTableType=1;
85 break;
86 }//end case 0
87 case 1:{
88 if (BunchLen==1)NextTableType=2;
89 else{
90 NextTableType=4;
91 Count=1;
92 }
93 break;
94 }//end case 1
95 case 2:{
96 NextTableType=0;
97 break;
98 }//end case 2
99 case 3:{
100 Count++;
101 if (Count==(BunchLen-1)){
102 NextTableType=4;
103 }
104 break;
105 }//end case 3
106 case 4:{
107 if (Count==1){
108 if (BunchLen>2)
109 NextTableType=3;
110 else
111 Count++;
112 }
113 else
114 NextTableType=0;
115 break;
116 }//end case 4
117 }//end switch
118 return;
119}
120
121/////////////////////////////////////////////////////////////////////////////////////////////////////
122
123/////////////////////////////////////////////////////////////////////////////////////////////////////
124
125Int_t AliTPCCompression::FillTables(const char* fSource,AliTPCHTable* table[],const Int_t NumTables){
126 //This method is used to compute the frequencies of the symbols in the source file
a79660fb 127 AliTPCBuffer160 buff(fSource,0);
128 ULong_t countWords=0;
129 ULong_t countTrailer=0;
130 Int_t numWords,padNum,rowNum,secNum=0;
131 Int_t value=0;
132 ULong_t stat[5]={0,0,0,0,0};
133 Int_t endFill=0;
134 Int_t end=1;
135 while(buff.ReadTrailerBackward(numWords,padNum,rowNum,secNum) !=-1 ){
136 if(end){
137 endFill=buff.GetFillWordsNum();
138 end=0;
2e9f335b 139 }//endif
a79660fb 140 countTrailer++;
141 if (numWords%4){
142 fFillWords+=4-numWords%4;
143 for(Int_t j=0;j<(4-numWords%4);j++){
144 value=buff.GetNextBackWord();
2e9f335b 145 }//end for
146 }//end if
147
a79660fb 148 Int_t packet[1024];
149 Int_t timePos[345];
150 Int_t tp=0;
151 for(Int_t i=0;i<345;i++)timePos[i]=0;
152 for(Int_t i=0;i<1024;i++)packet[i]=0;
2e9f335b 153
a79660fb 154 Int_t nextTableType=0;
155 Int_t bunchLen=0;
156 Int_t count=0;
157 for(Int_t i=0;i<numWords;i++){
158 value=buff.GetNextBackWord();
159 packet[i]=value;
160 if(nextTableType==1){
161 timePos[tp]=i;
162 tp++;
2e9f335b 163 }
a79660fb 164 NextTable(value,nextTableType,bunchLen,count);
2e9f335b 165 }//end for
166 //computing the Time gap between two bunches
167 Int_t temp=0;
a79660fb 168 tp--;
169 Int_t previousTime=packet[timePos[tp]];
170 for(Int_t i=tp-1;i>=0;i--){
171 Int_t timPos=timePos[i];
172 Int_t bunchLen=packet[timPos-1]-2;
173 temp=packet[timPos];
174 packet[timPos]=packet[timPos]-previousTime-bunchLen;
175 previousTime=temp;
2e9f335b 176 }
a79660fb 177 nextTableType=0;
178 count=0;
179 bunchLen=0;
180 for(Int_t i=0;i<numWords;i++){
181 value=packet[i];
182 table[nextTableType]->SetFrequency(value);
183 stat[nextTableType]++;
184 NextTable(value,nextTableType,bunchLen,count);
185 countWords++;
2e9f335b 186 }//end for
187 }//end while
a79660fb 188 cout<<"Number of words: "<<countWords<<endl;
189 cout<<"Number of trailers: "<<countTrailer<<endl;
190 cout<<"Number of fill words "<<fFillWords+endFill<<endl;
191 cout<<"Total number of words: "<<countWords+countTrailer*4+fFillWords<<endl;
2e9f335b 192 //STATISTICS
a79660fb 193 fStat.open("Statistics");
194 fStat<<"Number of words:..........................................."<<countWords<<endl;
195 fStat<<"Number of trailers (4 10 bits words in each one)..........."<<countTrailer<<endl;
196 fStat<<"Number of fill words:......................................"<<fFillWords+endFill<<endl;
197 fStat<<"Total number of words:....................................."<<countWords+countTrailer*4+fFillWords+endFill<<endl;
198 fStat<<"-----------------------------------------"<<endl;
199 fStat<<"Number of Bunches............."<<stat[0]<<endl;
200 fStat<<"Number of Time bin............"<<stat[1]<<endl;
201 fStat<<"Number of One Samples Bunch..."<<stat[2]<<endl;
202 fStat<<"Number of Central Samples....."<<stat[3]<<endl;
203 fStat<<"Number of Border Samples......"<<stat[4]<<endl;
204 fStat<<"-----------------------------------------"<<endl;
205 ULong_t fileDimension=(ULong_t)TMath::Ceil(double((countTrailer*4+countWords+fFillWords+endFill)*10/8));
206 fStat<<"Total file Size in bytes.."<<fileDimension<<endl;
207 Double_t percentage=TMath::Ceil((fFillWords+endFill)*125)/fileDimension;
208 fStat<<"Fill Words................"<<(ULong_t)TMath::Ceil((fFillWords+endFill)*10/8)<<" bytes "<<percentage<<"%"<<endl;
209 percentage=(Double_t)countTrailer*500/fileDimension;
210 fStat<<"Trailer..................."<<countTrailer*5<<" bytes "<<percentage<<"%"<<endl;
2e9f335b 211
a79660fb 212 percentage=(Double_t)((stat[0]+stat[1]+stat[2]+stat[3]+stat[4])) *125/fileDimension;
213 fStat<<"Data......................"<<(ULong_t)TMath::Ceil((stat[0]+stat[1]+stat[2]+stat[3]+stat[4])*10/8)<<" bytes "<<percentage<<"%"<<endl;
2e9f335b 214
a79660fb 215 percentage=(Double_t)(stat[0]*125)/fileDimension;
216 fStat<<"Bunch....................."<<(ULong_t)TMath::Ceil(stat[0]*10/8)<<" bytes "<<percentage<<"%"<<endl; //
217 percentage=(Double_t)(stat[1]*125)/fileDimension;
218 fStat<<"Time......................"<<(ULong_t)TMath::Ceil(stat[1]*10/8)<<" bytes "<<percentage<<"%"<<endl; //
2e9f335b 219
220
a79660fb 221 percentage=(Double_t)((stat[2]+stat[3]+stat[4])) *125/fileDimension;
222 fStat<<"Amplitude values.........."<<(ULong_t)TMath::Ceil((stat[2]+stat[3]+stat[4])*10/8)<<" bytes "<<percentage<<"%"<<endl;
223 percentage=(Double_t)(stat[2]*125)/fileDimension;
224 fStat<<" One Samples..............."<<(ULong_t)TMath::Ceil(stat[2]*10/8)<<" bytes "<<percentage<<"%"<<endl; //
225 percentage=(Double_t)(stat[3]*125)/fileDimension;
226 fStat<<" Central Samples..........."<<(ULong_t)TMath::Ceil(stat[3]*10/8)<<" bytes "<<percentage<<"%"<<endl; //
227 percentage=(Double_t)(stat[4]*125)/fileDimension;
228 fStat<<" Border Samples............"<<(ULong_t)TMath::Ceil(stat[4]*10/8)<<" bytes "<<percentage<<"%"<<endl; //
229 fStat.close();
2e9f335b 230 return 0;
231}
232////////////////////////////////////////////////////////////////////////////////////////
233Int_t AliTPCCompression::StoreTables(AliTPCHTable* table[],const Int_t NumTable){
a79660fb 234 //This method stores the tables in a sequence of binary file
2e9f335b 235 char filename[15];
236 ofstream fTable;
237 for(Int_t k=0;k<NumTable;k++){
30c1018e 238 sprintf(filename,"Table%d.dat",k);
239#ifndef __DECCXX
2e9f335b 240 fTable.open(filename,ios::binary);
30c1018e 241#else
242 fTable.open(filename);
243#endif
2e9f335b 244 Int_t dim=table[k]->Size();
245 //Table dimension is written into a file
246 fTable.write((char*)(&dim),sizeof(Int_t));
247 //One table is written into a file
248 for(Int_t i=0;i<dim;i++){
a79660fb 249 UChar_t codeLen=table[k]->CodeLen()[i];
250 // ULong_t code=(ULong_t)table[k]->Code()[i];
251 Double_t code=table[k]->Code()[i];
252 fTable.write((char*)(&codeLen),sizeof(UChar_t));
253 //fTable.write((char*)(&code),sizeof(ULong_t));
254 fTable.write((char*)(&code),sizeof(Double_t));
2e9f335b 255 } //end for
256 fTable.close();
257 }//end for
258 return 0;
259}
260////////////////////////////////////////////////////////////////////////////////////////
9f992f70 261Int_t AliTPCCompression::CreateTableFormula(Double_t beta,ULong_t M,Int_t dim,Int_t Type){
262 // Type = 0 for Bunch length
263 // Type = 1 for Time Gap
264 ULong_t freq;
265 Double_t sum=0;
266 Double_t min=10;
267 Double_t alpha=0;
268 Double_t A=0;
269 AliTPCHTable *Table=new AliTPCHTable(dim);
270
271 freq=1;
272 Double_t FreqArray[1024];
273 for(Int_t i=0;i<1024;i++){
274 FreqArray[i]=0;
275 }
276 alpha=M*0.000000602+0.0104;
277 if (fVerbose)
278 cout<<"alpha "<<alpha<<endl;
279 for(Int_t x=0;x<dim;x++){
280 if (Type==1)
281 FreqArray[x]=TMath::Power((x+1),-beta)*TMath::Exp(-alpha*(x+1));
282 else
283 FreqArray[x]=TMath::Power((x+1),-beta);
284 sum+=FreqArray[x];
285 if (FreqArray[x]<min)min=FreqArray[x];
286 }//end for
287 if (fVerbose)
288 cout<<"Minimun Value "<<min<<endl;
289 A=1/sum;
290 if (fVerbose)
291 cout<<"A Value: "<<A<<endl;
292 for(Int_t x=0;x<dim;x++){
293 if (Type==0)//Bunch length
294 if (x>=3)//minimum bunch length
295 Table->SetValFrequency(x,A*FreqArray[x]*1000);
296 else
297 Table->SetValFrequency(x,0);
298 else //Time table
299 Table->SetValFrequency(x,A*FreqArray[x]);
300 }
301 Table->BuildHTable();
302 ofstream fTable;
303 char filename[15];
304 sprintf(filename,"Table%d.dat",Type);
305 fTable.open(filename,ios::binary);
306 Int_t dimTable=Table->Size();
307 //Table dimension is written into a file
308 fTable.write((char*)(&dimTable),sizeof(Int_t));
309 //One table is written into a file
310 for(Int_t i=0;i<dimTable;i++){
311 UChar_t CodeLen=Table->CodeLen()[i];
312 Double_t Code=Table->Code()[i];
313 fTable.write((char*)(&CodeLen),sizeof(UChar_t));
314 fTable.write((char*)(&Code),sizeof(Double_t));
315 } //end for
316 fTable.close();
317 delete Table;
318 return 0;
319}
320////////////////////////////////////////////////////////////////////////////////////////
2e9f335b 321Int_t AliTPCCompression::CreateTables(const char* fSource,const Int_t NumTables){
a79660fb 322 //Tables manager
2e9f335b 323 /*
324 Table index:
325 0==> Bunch length values
326 1==> Time Bin values
327 2==> 1-samples bunch
328 3==> Central samples
329 4==> Border samples
330 */
a79660fb 331 Int_t n=10;// 10 bits per symbol
2e9f335b 332 AliTPCHTable ** table = new AliTPCHTable*[NumTables];
333 //The table is inizialized with the rigth number of rows
9f992f70 334 for(Int_t i=0;i<NumTables;i++){
335 table[i]=new AliTPCHTable((Int_t)(TMath::Power(2,n)));
336 table[i]->SetVerbose(fVerbose);
337 }
2e9f335b 338 //The frequencies are calculated and the tables are filled
339 if (fVerbose)
340 cout<<"Filling tables...\n";
341 //The get the frequencies
342 FillTables(fSource,table,NumTables);
343
344 //This part will be used in the table optimization phase
345 /*
346 for(Int_t i=0;i<NumTables;i++){
347 table[i]->CompleteTable(i);
348 }
349 */
350 if(fVerbose){
351 cout<<"Entropy of Bunch length table........."<<table[0]->GetEntropy()<<endl;
352 cout<<"Entropy of Time bin table............."<<table[1]->GetEntropy()<<endl;
353 cout<<"Entropy of one Sample bunch table....."<<table[2]->GetEntropy()<<endl;
354 cout<<"Entropy of Central Sample table......."<<table[3]->GetEntropy()<<endl;
355 cout<<"Entropy Border Samples table.........."<<table[4]->GetEntropy()<<endl;
356 }
a79660fb 357 fStat.open("Statistics",ios::app);
358 fStat<<endl;
359 fStat<<"----------------- ENTROPY for castomized tables --------------------------"<<endl;
360 fStat<<"Entropy of Bunch length table......."<<table[0]->GetEntropy()<<endl;
361 fStat<<"Entropy of Time bin table..........."<<table[1]->GetEntropy()<<endl;
362 fStat<<"Entropy of one Sample bunch table..."<<table[2]->GetEntropy()<<endl;
363 fStat<<"Entropy of Central Sample table....."<<table[3]->GetEntropy()<<endl;
364 fStat<<"Entropy Border Samples table........"<<table[4]->GetEntropy()<<endl;
365 fStat.close();
2e9f335b 366
367 if (fVerbose)
368 cout<<"Tables filled \n";
9f992f70 369
370 //Frequencies normalization
371 table[0]->NormalizeFrequencies();
372 table[1]->NormalizeFrequencies();
373 table[2]->NormalizeFrequencies();
374 table[3]->NormalizeFrequencies();
375 table[4]->NormalizeFrequencies();
376
2e9f335b 377 //Tables are saved in a sequence of text file and using the macro Histo.C is it possible to get
378 //a series of histograms rappresenting the frequency distribution
379 table[0]->StoreFrequencies("BunchLenFreq.txt");
380 table[1]->StoreFrequencies("TimeFreq.txt");
381 table[2]->StoreFrequencies("Sample1Freq.txt");
382 table[3]->StoreFrequencies("SCentralFreq.txt");
383 table[4]->StoreFrequencies("SBorderFreq.txt");
384 if (fVerbose)
385 cout<<"Creating Tables..\n";
386 //One Huffman tree is created for each table starting from the frequencies of the symbols
387 for(Int_t i=0;i<NumTables;i++){
388 table[i]->BuildHTable();
389 if (fVerbose==2){
390 cout<<"Number of elements inside the table:"<<table[i]->GetWordsNumber();
391 switch(i){
392 case 0:{
393 cout<<" (Bunch Length)"<<endl;
394 break;
395 }
396 case 1:{
397 cout<<" (Time Bin)"<<endl;
398 break;
399 }
400 case 2:{
401 cout<<" (1 Samples Bunch)"<<endl;
402 break;
403 }
404 case 3:{
405 cout<<" (Central Samples)"<<endl;
406 break;
407 }
408 case 4:{
409 cout<<" (Border Samples)"<<endl;
410 break;
411 }
412 }//end switch
413 table[i]->PrintTable();
414 }
415 }
416 //The tables are saved ad binary files
417 StoreTables(table,NumTables);
418 //The tables stored in memory are deleted;
419 for(Int_t i=0;i<NumTables;i++)delete table[i];
420 delete [] table;
421 return 0;
422}
423/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
424Int_t AliTPCCompression::RetrieveTables(AliTPCHTable* table[],Int_t NumTable){
a79660fb 425 //This method retrieve the Huffman tables from a sequence of binary files
2e9f335b 426 if (fVerbose)
427 cout<<"Retrieving tables from files \n";
a79660fb 428 // ULong_t code;
429 Double_t code;
430 UChar_t codeLen;
2e9f335b 431 ifstream fTable;
432 char filename[15];
433 //The following for loop is used to generate the Huffman trees acording to the tables
434 for(Int_t k=0;k<NumTable;k++){
a79660fb 435 Int_t dim;//this variable contains the table dimension
2e9f335b 436 sprintf(filename,"Table%d.dat",k);
30c1018e 437#ifndef __DECCXX
2e9f335b 438 fTable.open(filename,ios::binary);
30c1018e 439#else
440 fTable.open(filename);
441#endif
9f992f70 442 if(!fTable){cout<<"File doesn't exist:"<<filename<<endl; exit(1);}
a79660fb 443 fTable.read((char*)(&dim),sizeof(Int_t));
2e9f335b 444 if (fVerbose)
a79660fb 445 cout<<"Table dimension: "<<dim<<endl;
446 table[k]=new AliTPCHTable(dim);
447 for(Int_t i=0;i<dim;i++){
448 fTable.read((char*)(&codeLen),sizeof(UChar_t));
449 table[k]->SetCodeLen(codeLen,i);
450 // fTable.read((char*)(&code),sizeof(ULong_t));
451 fTable.read((char*)(&code),sizeof(Double_t));
452 table[k]->SetCode(Mirror((ULong_t)code,codeLen),i);
2e9f335b 453 }//end for
454 fTable.close();
455 }//end for
456 if (fVerbose)
457 cout<<"Trees generated \n";
458 //At this point the trees are been built
459 return 0;
460}
9f992f70 461
462Int_t AliTPCCompression::CreateTablesFromTxtFiles(Int_t NumTable){
463 //This method creates a set of binary tables, needed by the Huffman
464 //algorith, starting from a set of frequencies tables stored in form of
465 //txt files
466 if (fVerbose)
467 cout<<"Retrieving frequencies from txt files \n";
468 ifstream fTable;
469 char filename[15];
470 //Tables are read from the files (Each codeword has been "Mirrored")
471 AliTPCHTable **table = new AliTPCHTable*[NumTable];
472 for(Int_t k=0;k<NumTable;k++){
473 sprintf(filename,"Table%d.txt",k);
474 cout<<filename<<endl;
475 fTable.open(filename);
476 if(!fTable){cout<<"File doesn't exist: "<<filename<<endl; exit(1);}
477 Int_t symbol=0;
478 Double_t freq=0;
479 table[k]=new AliTPCHTable(1024);
480 while(!fTable.eof()){
481 fTable>>freq;
482 if (fTable.good()){
483 if (freq<0){
484 cout<<"Frequency cannot be negative !!!\n";
485 exit(1);
486 }
487 table[k]->SetValFrequency(symbol,freq);
488 }
489 symbol++;
490 }//end while
491 fTable.clear();
492 fTable.close();
493 }//end for
494 fStat.open("Statistics",ios::app);
495 fStat<<endl;
496 fStat<<"----------------- ENTROPY for external txt tables --------------------------"<<endl;
497 fStat<<"Entropy of Bunch length table......."<<table[0]->GetEntropy()<<endl;
498 fStat<<"Entropy of Time bin table..........."<<table[1]->GetEntropy()<<endl;
499 fStat<<"Entropy of one Sample bunch table..."<<table[2]->GetEntropy()<<endl;
500 fStat<<"Entropy of Central Sample table....."<<table[3]->GetEntropy()<<endl;
501 fStat<<"Entropy Border Samples table........"<<table[4]->GetEntropy()<<endl;
502 fStat.close();
503 for(Int_t k=0;k<NumTable;k++){
504 table[k]->BuildHTable();
505 }//end for
506 //The tables are saved ad binary files
507 StoreTables(table,NumTable);
508 //The tables stored in memory are deleted;
509 for(Int_t i=0;i<NumTable;i++)delete table[i];
510 delete [] table;
511 return 0;
512}
513
2e9f335b 514////////////////////////////////////////////////////////////////////////////////////////
515/* COMPRESSION */
516////////////////////////////////////////////////////////////////////////////////////////
517
518void AliTPCCompression::StoreValue(ULong_t val,UChar_t len){
a79660fb 519 //This method stores the value "val" of "len" bits into the internal buffer "fBuffer"
2e9f335b 520 if (len<=fFreeBitsBuffer){ // val is not splitted in two buffer
521 fFreeBitsBuffer-=len;
522 fBuffer=fBuffer<<len;
523 fBuffer=fBuffer|val;
524 if(!fFreeBitsBuffer){ // if the buffer is full it is written into a file
525 f.write((char*)(&fBuffer),sizeof(ULong_t));
526 fFreeBitsBuffer=fDimBuffer;
527 fBuffer=0;
528 }
529 }//end if
530 else{ //val has to be splitted in two buffers
531 fBuffer=fBuffer<<fFreeBitsBuffer;
532 ULong_t temp;
533 temp=val;
534 temp=temp>>(len-fFreeBitsBuffer);
535 fBuffer=fBuffer|temp;
536 f.write((char*)(&fBuffer),sizeof(ULong_t));
537 fFreeBitsBuffer=fDimBuffer-(len-fFreeBitsBuffer);
538 val=val<<fFreeBitsBuffer;
539 val=val>>fFreeBitsBuffer;
540 fBuffer=val;
541 }//end else
542 return;
543}
544//////////////////////////////////////////////////////////////////////////////////////////////////
545void AliTPCCompression::Flush(){
a79660fb 546 //The last buffer cannot be completely full so to save it
547 //into the output file it is first necessary to fill it with an hexadecimal pattern
2e9f335b 548 if(fFreeBitsBuffer<fDimBuffer){
549 fBuffer=fBuffer<<fFreeBitsBuffer;
550 f.write((char*)(&fBuffer),sizeof(ULong_t));
551 }//end if
552 return;
553}
554//////////////////////////////////////////////////////////////////////////////////////////////////
a79660fb 555ULong_t AliTPCCompression::Mirror(ULong_t val,UChar_t len)const{
556 //This method inverts the digits of the number "val" and length "len"
557 //indicates the number of digits of the number considered in binary notation
2e9f335b 558 ULong_t specular=0;
a79660fb 559 ULong_t mask=0x1;
2e9f335b 560 ULong_t bit;
561 for(Int_t i=0;i<len;i++){
a79660fb 562 bit=val&mask;
2e9f335b 563 bit=bit>>i;
564 specular=specular<<1;
565 specular=specular|bit;
a79660fb 566 mask=mask<<1;
2e9f335b 567 }
568 return specular;
569}
570//////////////////////////////////////////////////////////////////////////////////////////////////
571Int_t AliTPCCompression::CompressData(AliTPCHTable* table[],Int_t NumTable,const char* fSource,const char* fDest){
a79660fb 572 //This method is used to compress the data stored in the Altro format file using specific tables
573 //calculated considering the frequencies of the symbol of the file that has to be compressed
2e9f335b 574 cout<<" COMPRESSION "<<endl;
575 cout<<"compression of the file "<<fSource<<" Output File: "<<fDest<<endl;
576 //the output file is open
30c1018e 577#ifndef __DECCXX
2e9f335b 578 f.open(fDest,ios::binary|ios::out);
30c1018e 579#else
580 f.open(fDest,ios::out);
581#endif
2e9f335b 582 //Tables are written into the output file
583 for(Int_t k=0;k<NumTable;k++){
584 Int_t dim=table[k]->Size();
585 //Table dimension is written into a file
586 f.write((char*)(&dim),sizeof(Int_t));
587 //One table is written into a file
588 for(Int_t i=0;i<dim;i++){
a79660fb 589 UChar_t codeLen=table[k]->CodeLen()[i];
590 ULong_t code=(ULong_t)table[k]->Code()[i];
591 f.write((char*)(&codeLen),sizeof(UChar_t));
592 f.write((char*)(&code),sizeof(ULong_t));
2e9f335b 593 } //end for
594 }//end for
595
596 // Source file is open
a79660fb 597 AliTPCBuffer160 buff(fSource,0);
2e9f335b 598 //coded words are written into the output file
a79660fb 599 Int_t numWords,padNum,rowNum,secNum=0;
600 ULong_t storedWords=0;
601 Int_t value=0;
602 ULong_t numPackets=0;
603 while(buff.ReadTrailerBackward(numWords,padNum,rowNum,secNum) !=-1 ){
604 numPackets++;
605 if (numWords%4){
606 for(Int_t j=0;j<(4-numWords%4);j++){
607 value=buff.GetNextBackWord();
2e9f335b 608 }//end for
609 }//end if
610
a79660fb 611 Int_t packet[1024];
612 Int_t timePos[345];
613 Int_t tp=0;
614 for(Int_t i=0;i<345;i++)timePos[i]=0;
615 for(Int_t i=0;i<1024;i++)packet[i]=0;
2e9f335b 616
a79660fb 617 Int_t nextTableType=0;
618 Int_t bunchLen=0;
619 Int_t count=0;
620 for(Int_t i=0;i<numWords;i++){
621 value=buff.GetNextBackWord();
622 packet[i]=value;
623 if(nextTableType==1){
624 timePos[tp]=i;
625 tp++;
2e9f335b 626 }
a79660fb 627 NextTable(value,nextTableType,bunchLen,count);
2e9f335b 628 }//end for
629 //computing the Time gap between two bunches
630 Int_t temp=0;
a79660fb 631 tp--;
632 Int_t previousTime=packet[timePos[tp]];
633 for(Int_t i=tp-1;i>=0;i--){
634 Int_t timPos=timePos[i];
635 Int_t bunchLen=packet[timPos-1]-2;
636 temp=packet[timPos];
637 packet[timPos]=packet[timPos]-previousTime-bunchLen;
638 previousTime=temp;
2e9f335b 639 }//end for
a79660fb 640 nextTableType=0;
641 count=0;
642 bunchLen=0;
643 Int_t timeBin=0;
2e9f335b 644 //All the words for one pad are compressed and stored in the compress file
a79660fb 645 for(Int_t i=0;i<numWords;i++){
646 value=packet[i];
647 if(nextTableType==1)timeBin=value;
648 if(nextTableType>1){
649 // ULong_t val=(ULong_t)table[nextTableType]->Code()[value]; // val is the code
650 Double_t val=table[nextTableType]->Code()[value]; // val is the code
651 UChar_t len=table[nextTableType]->CodeLen()[value]; // len is the length (number of bits)of val
2e9f335b 652 StoreValue(Mirror((ULong_t)val,len),len);
a79660fb 653 storedWords++;
2e9f335b 654 }//end if
a79660fb 655 NextTable(value,nextTableType,bunchLen,count);
656 if(nextTableType==0){
657 // ULong_t val=(ULong_t)table[1]->Code()[timeBin]; // val is the code
658 Double_t val=table[1]->Code()[timeBin]; // val is the code
659 UChar_t len=table[1]->CodeLen()[timeBin]; // len is the length (number of bits)of val
2e9f335b 660 StoreValue(Mirror((ULong_t)val,len),len);
a79660fb 661 //val=(ULong_t)table[nextTableType]->Code()[(bunchLen+2)]; // val is the code
662 val=table[nextTableType]->Code()[(bunchLen+2)]; // val is the code
663 len=table[nextTableType]->CodeLen()[(bunchLen+2)]; // len is the length (number of bits)of val
2e9f335b 664 StoreValue(Mirror((ULong_t)val,len),len);
a79660fb 665 storedWords+=2;
2e9f335b 666 }
667 }//end for
668 //Trailer
a79660fb 669 StoreValue(numWords,10);
670 StoreValue(padNum,10);
671 StoreValue(rowNum,10);
672 StoreValue(secNum,9);
2e9f335b 673 StoreValue(1,1);
a79660fb 674 storedWords+=4;
2e9f335b 675 }//end while
a79660fb 676 StoreValue(numPackets,32);
677 cout<<"Number of strored packet: "<<numPackets<<endl;
2e9f335b 678 StoreValue(1,1);
679 //The last buffen cannot be completely full
680 Flush();
a79660fb 681 cout<<"Number of stored words: "<<storedWords<<endl;
2e9f335b 682 f.close();
683 return 0;
684}
685
686/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
687Int_t AliTPCCompression::CompressDataOptTables(Int_t NumTable,const char* fSource,const char* fDest){
a79660fb 688 //This method compress an Altro format file using a general set of tables stored as binary files to be provided
2e9f335b 689 if (fVerbose){
690 cout<<" BackWord COMPRESSION "<<endl;
691 cout<<"compression of the file "<<fSource<<" Output File: "<<fDest<<endl;
692 }
693 //Tables are read from the files (Each codeword has been "Mirrored")
a79660fb 694 AliTPCHTable **table = new AliTPCHTable*[NumTable];
2e9f335b 695 RetrieveTables(table,NumTable);
696 //the output file is open
30c1018e 697#ifndef __DECCXX
2e9f335b 698 f.open(fDest,ios::binary|ios::out);
30c1018e 699#else
700 f.open(fDest,ios::out);
701#endif
2e9f335b 702 // Source file is open
a79660fb 703 AliTPCBuffer160 buff(fSource,0);
2e9f335b 704 //coded words are written into a file
a79660fb 705 Int_t numWords,padNum,rowNum,secNum=0;
706 ULong_t storedWords=0;
707 Int_t value=0;
708 ULong_t numPackets=0;
709 Double_t stat[5]={0.,0.,0.,0.,0.};
710 ULong_t trailerNumbers=0;
711 Double_t numElem[5]={0,0,0,0,0};
712 Double_t fillWords=0.;
713 fStat.open("Statistics",ios::app);
714 fStat<<endl;
715 fStat<<"-------------------COMPRESSION STATISTICS----------"<<endl;
716 Int_t end=1;
717 while(buff.ReadTrailerBackward(numWords,padNum,rowNum,secNum) !=-1 ){
718 if(end){
719 fillWords=buff.GetFillWordsNum();
720 end=0;
2e9f335b 721 }//endif
722
a79660fb 723 numPackets++;
724 if (numWords%4){
725 fillWords+=4-numWords%4;
726 for(Int_t j=0;j<(4-numWords%4);j++){
727 value=buff.GetNextBackWord();
2e9f335b 728 }//end for
729 }//end if
730
a79660fb 731 Int_t packet[1024];
732 Int_t timePos[345];
733 Int_t tp=0;
734 for(Int_t i=0;i<345;i++)timePos[i]=0;
735 for(Int_t i=0;i<1024;i++)packet[i]=0;
2e9f335b 736
a79660fb 737 Int_t nextTableType=0;
738 Int_t bunchLen=0;
739 Int_t count=0;
740 for(Int_t i=0;i<numWords;i++){
741 value=buff.GetNextBackWord();
742 packet[i]=value;
743 if(nextTableType==1){
744 timePos[tp]=i;
745 tp++;
2e9f335b 746 }
a79660fb 747 NextTable(value,nextTableType,bunchLen,count);
2e9f335b 748 }//end for
749 //computing the Time gap between two bunches
750 Int_t temp=0;
a79660fb 751 tp--;
752 Int_t previousTime=packet[timePos[tp]];
753 for(Int_t i=tp-1;i>=0;i--){
754 Int_t timPos=timePos[i];
755 Int_t bunchLen=packet[timPos-1]-2;
756 temp=packet[timPos];
757 packet[timPos]=packet[timPos]-previousTime-bunchLen;
758 previousTime=temp;
2e9f335b 759 }//end for
760
a79660fb 761 nextTableType=0;
762 count=0;
763 bunchLen=0;
764 Int_t timeBin=0;
765 for(Int_t i=0;i<numWords;i++){
766 value=packet[i];
767 if(nextTableType==1)timeBin=value;
768 if(nextTableType>1){
769 //ULong_t val=(ULong_t)table[nextTableType]->Code()[value]; // val is the code
770 Double_t val=table[nextTableType]->Code()[value]; // val is the code
771 UChar_t len=table[nextTableType]->CodeLen()[value]; // len is the length (number of bits)of val
772 stat[nextTableType]+=len;
773 numElem[nextTableType]++;
2e9f335b 774 StoreValue((ULong_t)val,len);
a79660fb 775 storedWords++;
2e9f335b 776 }//end if
a79660fb 777 NextTable(value,nextTableType,bunchLen,count);
778 if(nextTableType==0){
779 // ULong_t val=(ULong_t)table[1]->Code()[timeBin]; // val is the code
780 Double_t val=table[1]->Code()[timeBin]; // val is the code
781 UChar_t len=table[1]->CodeLen()[timeBin]; // len is the length (number of bits)of val
782 stat[1]+=len;
783 numElem[1]++;
2e9f335b 784 StoreValue((ULong_t)val,len);
a79660fb 785 // val=(ULong_t)table[nextTableType]->Code()[(bunchLen+2)]; // val is the code
786 val=table[nextTableType]->Code()[(bunchLen+2)]; // val is the code
787 len=table[nextTableType]->CodeLen()[(bunchLen+2)]; // len is the length (number of bits)of val
2e9f335b 788 StoreValue((ULong_t)val,len);
a79660fb 789 stat[nextTableType]+=len;
790 numElem[nextTableType]++;
791 storedWords+=2;
2e9f335b 792 }
793 }//end for
794 //Trailer
a79660fb 795 StoreValue(numWords,10);
796 StoreValue(padNum,10);
797 StoreValue(rowNum,10);
798 StoreValue(secNum,9);
2e9f335b 799 StoreValue(1,1);
a79660fb 800 storedWords+=4;
801 trailerNumbers++;
2e9f335b 802 }//end while
a79660fb 803 StoreValue(numPackets,32);
2e9f335b 804 if(fVerbose)
a79660fb 805 cout<<"Number of strored packets: "<<numPackets<<endl;
2e9f335b 806 StoreValue(1,1);
807 //The last buffen cannot be completely full
808 Flush();
809 if(fVerbose)
a79660fb 810 cout<<"Number of stored words: "<<storedWords<<endl;
2e9f335b 811 f.close();
812 //Tables are deleted
813 for(Int_t i=0;i<NumTable;i++){
814 delete table[i];
815 }//end for
816 delete [] table;
a79660fb 817 Double_t dimension=(ULong_t)TMath::Ceil((stat[0]+stat[1]+stat[2]+stat[3]+stat[4])/8)+trailerNumbers*5;
818 fStat<<"Trailer Dimension in bytes......"<<trailerNumbers*5<<endl;
819 fStat<<"Data Dimension in bytes........."<<(ULong_t)TMath::Ceil((stat[0]+stat[1]+stat[2]+stat[3]+stat[4])/8)<<endl;
820 fStat<<"Compressed file dimension......."<<(ULong_t)dimension<<endl;
2e9f335b 821 /*
a79660fb 822 fStat<<(ULong_t)trailerNumbers<<endl;
823 fStat<<(ULong_t)fillWords<<endl;
824 fStat<<(ULong_t)numElem[0]<<endl;
825 fStat<<(ULong_t)numElem[1]<<endl;
826 fStat<<(ULong_t)numElem[2]<<endl;
827 fStat<<(ULong_t)numElem[3]<<endl;
828 fStat<<(ULong_t)numElem[4]<<endl;
2e9f335b 829 */
a79660fb 830 fillWords=(fillWords+numElem[0]+numElem[1]+numElem[2]+numElem[3]+numElem[4]+trailerNumbers*4)*10/8;
831 fStat<<"Original file dimension........."<<(ULong_t)fillWords<<endl;
2e9f335b 832
a79660fb 833 Double_t ratio=(dimension/fillWords)*100;
834 fStat<<"Compression ratio (Compressed/Uncompressed)..."<<ratio<<"%"<<endl;
835 fStat<<endl;
9f992f70 836 if (numElem[0])
837 fStat<<"Bunch length size in bytes......"<<(ULong_t)TMath::Ceil(stat[0]/8)<<" Comppression.."<<(stat[0]/numElem[0])*10<<"%"<<endl;
838 if (numElem[1])
839 fStat<<"Time gap size in bytes.........."<<(ULong_t)TMath::Ceil(stat[1]/8)<<" Comppression.."<<(stat[1]/numElem[1])*10<<"%"<<endl;
840 if (numElem[2]+numElem[3]+numElem[4])
841 fStat<<"Amplitude values in bytes......."<<(ULong_t)TMath::Ceil((stat[2]+stat[3]+stat[4])/8)<<" Comppression.."<<
842 ((stat[2]+stat[3]+stat[4])/(numElem[2]+numElem[3]+numElem[4]))*10<<"%"<<endl;
843 if (numElem[2])
a79660fb 844 fStat<<" One Samples in bytes............"<<(ULong_t)TMath::Ceil(stat[2]/8)<<" Comppression.."<<(stat[2]/numElem[2])*10<<"%"<<endl;
9f992f70 845 if (numElem[3])
a79660fb 846 fStat<<" Central Samples size in bytes..."<<(ULong_t)TMath::Ceil(stat[3]/8)<<" Comppression.."<<(stat[3]/numElem[3])*10<<"%"<<endl;
9f992f70 847 if (numElem[4])
a79660fb 848 fStat<<" Border Samples size in bytes...."<<(ULong_t)TMath::Ceil(stat[4]/8)<<" Comppression.."<<(stat[4]/numElem[4])*10<<"%"<<endl;
849 fStat<<endl;
850 fStat<<"Average number of bits per word"<<endl;
9f992f70 851 if (numElem[0])
852 fStat<<"Bunch length ......"<<stat[0]/numElem[0]<<endl;
853 if (numElem[1])
854 fStat<<"Time gap .........."<<stat[1]/numElem[1]<<endl;
855 if (numElem[2])
856 fStat<<"One Samples........"<<stat[2]/numElem[2]<<endl;
857 if (numElem[3])
858 fStat<<"Central Samples ..."<<stat[3]/numElem[3]<<endl;
859 if (numElem[4])
860 fStat<<"Border Samples....."<<stat[4]/numElem[4]<<endl;
a79660fb 861 fStat.close();
2e9f335b 862 return 0;
863}
864
865////////////////////////////////////////////////////////////////////////////////////////
866
867////////////////////////////////////////////////////////////////////////////////////////
868/* DECOMPRESSION */
869////////////////////////////////////////////////////////////////////////////////////////
870void AliTPCCompression::CreateTrees(AliTPCHNode *RootNode[],const Int_t NumTables){
871 //The first part of the compressed file cotains the tables
872 //The following for loop is used to generate the Huffman trees acording to the tables
873 if(fVerbose)
874 cout<<"Creating the Huffman trees \n";
875 AliTPCHNode *node=0;
a79660fb 876 // ULong_t code;
877 Double_t code;
878 UChar_t codeLen;
2e9f335b 879 //loop over the numbero of tables
880 for(Int_t k=0;k<NumTables;k++){
881 RootNode[k]=new AliTPCHNode(); //RootNode is the root of the tree
a79660fb 882 Int_t dim;//this variable contains the table dimension
883 f.read((char*)(&dim),sizeof(Int_t));
2e9f335b 884 if (fVerbose)
a79660fb 885 cout<<"Table dimension: "<<dim<<endl;
2e9f335b 886 //loop over the words of a table
a79660fb 887 for(Int_t i=0;i<dim;i++){
888 f.read((char*)(&codeLen),sizeof(UChar_t));
889 //f.read((char*)(&code),sizeof(ULong_t));
890 f.read((char*)(&code),sizeof(Double_t));
2e9f335b 891 node=RootNode[k];
a79660fb 892 for(Int_t j=1;j<=codeLen;j++){
2e9f335b 893 ULong_t bit,val=0;
a79660fb 894 val=(ULong_t)TMath::Power(2,codeLen-j);
895 bit=(ULong_t)code&val;
2e9f335b 896 AliTPCHNode *temp=node;
897 if(bit){
898 node=node->GetRight();
899 if(!node){
900 node=new AliTPCHNode();
901 temp->SetRight(node);
902 }//end if
903 }//end if
904 else{
905 node=node->GetLeft();
906 if(!node){
907 node=new AliTPCHNode();
908 temp->SetLeft(node);
909 }//end if
910 }//end else
911 }//end for
a79660fb 912 if(codeLen){
2e9f335b 913 node->SetSymbol(i);
a79660fb 914 node->SetFrequency(codeLen);
2e9f335b 915 }//end if
916 //cout<<node->GetSymbol()<<" "<<(Int_t)node->GetFrequency()<<endl;
917 }//end for
918 }//end for
919 if (fVerbose)
920 cout<<"Trees generated \n";
921 //At this point the trees are been built
922}
923//////////////////////////////////////////////////////////////////////////////////////////////////
924void AliTPCCompression::CreateTreesFromFile(AliTPCHNode *RootNode[],const Int_t NumTables){
a79660fb 925 //For each table this method builds the associate Huffman tree starting from the codeword and
926 //the codelength of each symbol
2e9f335b 927 if(fVerbose)
928 cout<<"Creating the Huffman trees \n";
929 AliTPCHNode *node=0;
a79660fb 930 // ULong_t code;
931 Double_t code;
932 UChar_t codeLen;
2e9f335b 933 ifstream fTable;
934 char filename[15];
935 //The following for loop is used to generate the Huffman trees acording to the tables
936 //loop over the tables
937 for(Int_t k=0;k<NumTables;k++){
938 RootNode[k]=new AliTPCHNode(); //RootNode is the root of the tree
a79660fb 939 Int_t dim=0;//this variable contains the table dimension
2e9f335b 940 sprintf(filename,"Table%d.dat",k);
30c1018e 941#ifndef __DECCXX
2e9f335b 942 fTable.open(filename,ios::binary);
30c1018e 943#else
944 fTable.open(filename);
945#endif
a79660fb 946 fTable.read((char*)(&dim),sizeof(Int_t));
2e9f335b 947 if (fVerbose)
a79660fb 948 cout<<"Table dimension: "<<dim<<endl;
2e9f335b 949 //loop over the words of one table
a79660fb 950 for(Int_t i=0;i<dim;i++){
951 fTable.read((char*)(&codeLen),sizeof(UChar_t));
952 //fTable.read((char*)(&code),sizeof(ULong_t));
953 fTable.read((char*)(&code),sizeof(Double_t));
2e9f335b 954 node=RootNode[k];
a79660fb 955 for(Int_t j=1;j<=codeLen;j++){
2e9f335b 956 ULong_t bit,val=0;
a79660fb 957 val=(ULong_t)TMath::Power(2,codeLen-j);
958 bit=(ULong_t)code&val;
2e9f335b 959 AliTPCHNode *temp=node;
960 if(bit){
961 node=node->GetRight();
962 if(!node){
963 node=new AliTPCHNode();
964 temp->SetRight(node);
965 }//end if
966 }//end if
967 else{
968 node=node->GetLeft();
969 if(!node){
970 node=new AliTPCHNode();
971 temp->SetLeft(node);
972 }//end if
973 }//end else
974 }//end for
a79660fb 975 if(codeLen){
2e9f335b 976 node->SetSymbol(i);
a79660fb 977 node->SetFrequency(codeLen);
2e9f335b 978 }//end if
979 }//end for
980 fTable.close();
981 }//end for
982 if (fVerbose)
983 cout<<"Trees generated \n";
984 //At this point the trees are been built
985}
986//////////////////////////////////////////////////////////////////////////////////////////////////
987void AliTPCCompression::DeleteHuffmanTree(AliTPCHNode* node){
988 //This function deletes all the nodes of an Huffman tree
a79660fb 989 //In an Huffman tree any internal node has always two children
2e9f335b 990 if (node){
991 DeleteHuffmanTree(node->GetLeft());
992 DeleteHuffmanTree(node->GetRight());
993 // cout<<node->GetSymbol()<<" "<<(Int_t)node->GetFrequency()<<endl;
994 delete node;
995 }
996}
997//////////////////////////////////////////////////////////////////////////////////////////////////
998void AliTPCCompression::VisitHuffmanTree(AliTPCHNode* node){
a79660fb 999 //This function realizes an in order visit of a binary tree
2e9f335b 1000 if (node){
1001 cout<<node->GetSymbol()<<" "<<node->GetFrequency()<<endl;
1002 VisitHuffmanTree(node->GetLeft());
1003 VisitHuffmanTree(node->GetRight());
1004 }
1005}
1006//////////////////////////////////////////////////////////////////////////////////////////////////
1007ULong_t AliTPCCompression::ReadWord(Int_t NumberOfBit){
a79660fb 1008 //This method retrieves a word of a specific number of bits from the file through the internal buffer
1009 ULong_t result=0;
2e9f335b 1010 ULong_t bit=0;
1011 for (Int_t i=0;i<NumberOfBit;i++){
1012 if (fReadBits==32){
1013 fPos-=sizeof(ULong_t);
1014 f.seekg(fPos);
1015 f.read((char*)(&fBuffer),sizeof(ULong_t));
1016 fReadBits=0;
1017 }//end if
1018 ULong_t mask=0;
0f0615a3 1019 mask=(ULong_t)TMath::Power(2,fReadBits);
2e9f335b 1020 bit=fBuffer&mask;
1021 bit=bit>>fReadBits;
1022 fReadBits++;
1023 bit=bit<<i;
a79660fb 1024 result=result|bit;
2e9f335b 1025 }//end for
a79660fb 1026 return result;
2e9f335b 1027}
1028//////////////////////////////////////////////////////////////////////////////////////////////////
1029void AliTPCCompression::ReadTrailer(Int_t &WordsNumber,Int_t &PadNumber,Int_t &RowNumber,Int_t &SecNumber){
a79660fb 1030 //It retrieves a trailer
2e9f335b 1031 ReadWord(1);
1032 SecNumber=ReadWord(9);
1033 RowNumber=ReadWord(10);
1034 PadNumber=ReadWord(10);
1035 WordsNumber=ReadWord(10);
1036 return;
1037}
1038//////////////////////////////////////////////////////////////////////////////////////////////////
1039ULong_t AliTPCCompression::GetDecodedWord(AliTPCHNode* root){
a79660fb 1040 //This method retrieves a decoded word.
2e9f335b 1041 AliTPCHNode *node=root;
1042 ULong_t symbol=0;
1043 Bool_t decoded=0;
1044 while(!decoded){
1045 ULong_t bit=ReadWord(1);
1046 if(bit)
1047 node=node->GetRight();
1048 else
1049 node=node->GetLeft();
1050 if (!(node->GetLeft())){
1051 symbol=node->GetSymbol();
1052 decoded=1;
1053 }
1054 }//end while
1055 return symbol;
1056}
1057//////////////////////////////////////////////////////////////////////////////////////////////////
1058Int_t AliTPCCompression::DecompressData(Int_t NumTables,const char* fname,char* fDest){
a79660fb 1059 //Decompression method
2e9f335b 1060 cout<<" DECOMPRESSION:"<<endl;
30c1018e 1061 cout<<"Source File "<<fname<<" Destination File "<<fDest<<endl;
1062#ifndef __DECCXX
2e9f335b 1063 f.open(fname,ios::binary|ios::in);
30c1018e 1064#else
1065 f.open(fname,ios::in);
1066#endif
9f992f70 1067 if(!f){cout<<"File doesn't exist:"<<fname<<endl;;return -1;}
a79660fb 1068 AliTPCHNode ** rootNode = new AliTPCHNode*[NumTables];
2e9f335b 1069 //Creation of the Huffman trees
a79660fb 1070 CreateTrees(rootNode,NumTables);
2e9f335b 1071 //to go to the end of the file
1072 f.seekg(0,ios::end);
1073 //to get the file dimension in byte
1074 fPos=f.tellg();
1075 fPos-=sizeof(ULong_t);
1076 f.seekg(fPos);
1077 fReadBits=0;
1078 fBuffer=0;
1079 f.read((char*)(&fBuffer),sizeof(ULong_t));
1080 Int_t bit=0;
a79660fb 1081 ULong_t mask=0x1;
2e9f335b 1082 while(!bit){
a79660fb 1083 bit=fBuffer&mask;
1084 mask=mask<<1;
2e9f335b 1085 fReadBits++;
1086 }
a79660fb 1087 ULong_t packetNumber=ReadWord(sizeof(ULong_t)*8);
1088 cout<<"Number of Packect: "<<packetNumber<<endl;
1089 AliTPCBuffer160 bufferFile(fDest,1);
2e9f335b 1090 ULong_t k=0;
a79660fb 1091 ULong_t wordsRead=0; //number of read coded words
1092 while(k<packetNumber){
1093 Int_t numWords,padNumber,rowNumber,secNumber=0;
1094 ReadTrailer(numWords,padNumber,rowNumber,secNumber);
2e9f335b 1095 k++;
a79660fb 1096 wordsRead+=4;
1097 Int_t previousTime=-1;
1098 Int_t time=0;
1099 Int_t nextTableType=0;
1100 Int_t bunchLen=0;
1101 Int_t count=0;
1102 for(Int_t i=0;i<numWords;i++){
1103 ULong_t symbol=GetDecodedWord(rootNode[nextTableType]);
1104 wordsRead++;
2e9f335b 1105 //Time reconstruction
a79660fb 1106 if (nextTableType==1){
1107 if (previousTime!=-1){
1108 previousTime=symbol+previousTime+bunchLen;
2e9f335b 1109 }
a79660fb 1110 else previousTime=symbol;
1111 time=previousTime;
2e9f335b 1112 }
a79660fb 1113 if(nextTableType>1)
1114 bufferFile.FillBuffer(symbol);
1115 NextTable(symbol,nextTableType,bunchLen,count);
1116 if(nextTableType==0){
1117 bufferFile.FillBuffer(time);
1118 bufferFile.FillBuffer(bunchLen+2);
1119 bunchLen=0;
2e9f335b 1120 }
1121 }//end for
a79660fb 1122 bufferFile.WriteTrailer(numWords,padNumber,rowNumber,secNumber);
2e9f335b 1123 }//end while
a79660fb 1124 cout<<"Number of decoded words:"<<wordsRead<<endl;
2e9f335b 1125 f.close();
1126 //The trees are deleted
1127 for(Int_t j=0;j<NumTables;j++){
a79660fb 1128 DeleteHuffmanTree(rootNode[j]);
2e9f335b 1129 }//end for
a79660fb 1130 delete [] rootNode;
2e9f335b 1131 return 0;
1132}
1133
1134//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
1135
1136Int_t AliTPCCompression::DecompressDataOptTables(Int_t NumTables,const char* fname,char* fDest){
a79660fb 1137 //This method decompress a file using separate Huffman tables
2e9f335b 1138 if(fVerbose){
1139 cout<<" DECOMPRESSION:"<<endl;
1140 cout<<"Source File "<<fname<<" Destination File "<<fDest<<endl;
1141 }
a79660fb 1142 AliTPCHNode ** rootNode = new AliTPCHNode*[NumTables];
2e9f335b 1143 //Creation of the Huffman trees
a79660fb 1144 CreateTreesFromFile(rootNode,NumTables);
30c1018e 1145#ifndef __DECCXX
2e9f335b 1146 f.open(fname,ios::binary|ios::in);
30c1018e 1147#else
1148 f.open(fname,ios::in);
1149#endif
9f992f70 1150 if(!f){cout<<"File doesn't exist:"<<fname<<endl;;return -1;}
2e9f335b 1151 //to go to the end of the file
1152 f.seekg(0,ios::end);
1153 //to get the file dimension in byte
1154 fPos=f.tellg();
1155 fPos-=sizeof(ULong_t);
1156 f.seekg(fPos);
1157 fReadBits=0;
1158 fBuffer=0;
1159 f.read((char*)(&fBuffer),sizeof(ULong_t));
1160 Int_t bit=0;
a79660fb 1161 ULong_t mask=0x1;
2e9f335b 1162 while(!bit){
a79660fb 1163 bit=fBuffer&mask;
1164 mask=mask<<1;
2e9f335b 1165 fReadBits++;
1166 }
a79660fb 1167 ULong_t packetNumber=ReadWord(sizeof(ULong_t)*8);
2e9f335b 1168 if(fVerbose){
a79660fb 1169 cout<<"Number of Packect: "<<packetNumber<<endl;
2e9f335b 1170 }
a79660fb 1171 AliTPCBuffer160 bufferFile(fDest,1);
2e9f335b 1172 ULong_t k=0;
a79660fb 1173 ULong_t wordsRead=0; //number of read coded words
1174 while(k<packetNumber){
1175 Int_t numWords,padNumber,rowNumber,secNumber=0;
1176 ReadTrailer(numWords,padNumber,rowNumber,secNumber);
2e9f335b 1177 k++;
a79660fb 1178 wordsRead+=4;
1179 Int_t previousTime=-1;
1180 Int_t time=0;
1181 Int_t nextTableType=0;
1182 Int_t bunchLen=0;
1183 Int_t count=0;
1184 for(Int_t i=0;i<numWords;i++){
1185 ULong_t symbol=GetDecodedWord(rootNode[nextTableType]);
1186 wordsRead++;
2e9f335b 1187 //Time reconstruction
a79660fb 1188 if (nextTableType==1){
1189 if (previousTime!=-1){
1190 previousTime=symbol+previousTime+bunchLen;
2e9f335b 1191 }
a79660fb 1192 else previousTime=symbol;
1193 time=previousTime;
2e9f335b 1194 }
a79660fb 1195 if(nextTableType>1)
1196 bufferFile.FillBuffer(symbol);
1197 NextTable(symbol,nextTableType,bunchLen,count);
1198 if(nextTableType==0){
1199 bufferFile.FillBuffer(time);
1200 bufferFile.FillBuffer(bunchLen+2);
1201 bunchLen=0;
2e9f335b 1202 }
1203 }//end for
a79660fb 1204 bufferFile.WriteTrailer(numWords,padNumber,rowNumber,secNumber);
2e9f335b 1205 }//end while
1206 if(fVerbose){
a79660fb 1207 cout<<"Number of decoded words:"<<wordsRead<<endl;
2e9f335b 1208 }
1209 f.close();
1210 //The trees are deleted
1211 for(Int_t j=0;j<NumTables;j++){
a79660fb 1212 DeleteHuffmanTree(rootNode[j]);
2e9f335b 1213 }//end for
a79660fb 1214 delete [] rootNode;
2e9f335b 1215 return 0;
1216}
1217
1218///////////////////////////////////////////////////////////////////////////////////////////
1219
a79660fb 1220void AliTPCCompression::ReadAltroFormat(char* fileOut,char* fileIn)const{
1221 //This method creates a text file containing the same information stored in
1222 //an Altro file. The information in the text file is organized pad by pad and
1223 //and for each pad it consists in a sequence of bunches (Bunch length +2,
1224 //Time bin of the last amplitude sample in the bunch, amplitude values)
1225 //It is used mainly for debugging
2e9f335b 1226 ofstream ftxt(fileOut);
a79660fb 1227 AliTPCBuffer160 buff(fileIn,0);
1228 Int_t numWords,padNum,rowNum,secNum=0;
1229 Int_t value=0;
9f992f70 1230 if (fVerbose) cout<<"Creating a txt file from an Altro Format file"<<endl;
a79660fb 1231 while(buff.ReadTrailerBackward(numWords,padNum,rowNum,secNum) !=-1 ){
9f992f70 1232 ftxt<<"S:"<<secNum<<" R:"<<rowNum<<" P:"<<padNum<<" W:"<<numWords<<endl;
a79660fb 1233 if (numWords%4){
1234 for(Int_t j=0;j<(4-numWords%4);j++){
1235 value=buff.GetNextBackWord();
2e9f335b 1236 }//end for
1237 }//end if
a79660fb 1238 for(Int_t i=0;i<numWords;i++){
1239 value=buff.GetNextBackWord();
1240 ftxt<<value<<endl;
2e9f335b 1241 }//end for
1242 }//end while
1243 ftxt.close();
1244 return;
1245}
1246
1247//////////////////////////////////////////////////////////////////////////////////////////