1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 // Interface to the Altro format
19 // to read and write digits
20 // To be used in Alice Data Challenges
21 // and in the compression of the RAW data
24 #include "AliTPCBuffer160.h"
25 #include <TObjArray.h>
26 #include <Riostream.h>
31 ClassImp(AliTPCBuffer160)
33 AliTPCBuffer160::AliTPCBuffer160(const char* fileName,Int_t flag){
34 //if flag = 1 the actual object is used in the write mode
35 //if flag = 0 the actual object is used in the read mode
44 //the buffer is cleaned
45 for (Int_t i=0;i<5;i++)fBuffer[i]=0;
46 //open the output file
48 f = new fstream(fileName,ios::binary|ios::out);
50 f = new fstream(fileName,ios::out);
56 f = new fstream(fileName,ios::binary|ios::in);
58 f = new fstream(fileName,ios::in);
60 if(!f){cout<<"File doesn't exist:"<<fileName<<endl;;exit(-1);}
62 //To get the file dimension (position of the last element in term of bytes)
63 f->seekg(0, ios::end);
64 fFilePosition= f->tellg();
65 fFileEnd=fFilePosition;
71 AliTPCBuffer160::AliTPCBuffer160(fstream* file, Int_t size){
72 //constructor for reading a file with mini header
80 fMiniHeaderPos=f->tellg();
81 f->seekg(fMiniHeaderPos+size);
82 fFilePosition=f->tellg();
83 fFileEnd=fFilePosition;
84 f->seekg(fMiniHeaderPos);
88 AliTPCBuffer160::~AliTPCBuffer160(){
91 //Flush out the Buffer content at the end only if Buffer wasn't completely filled
94 cout<<"File Created\n";
103 AliTPCBuffer160::AliTPCBuffer160(const AliTPCBuffer160 &source)
106 if(&source==this)return;
107 this->fShift=source.fShift;
108 this->fCurrentCell=source.fCurrentCell;
109 this->fFreeCellBuffer=source.fFreeCellBuffer;
110 this->fFlag=source.fFlag;
111 this->fMaskBackward=source.fMaskBackward;
112 this->fFilePosition=source.fFilePosition;
113 this->fMiniHeaderPos=source.fMiniHeaderPos;
114 this->fVerbose=source.fVerbose;
115 for (Int_t i=0;i<5;i++)this->fBuffer[i]=source.fBuffer[i];
119 AliTPCBuffer160& AliTPCBuffer160::operator=(const AliTPCBuffer160 &source){
121 if(&source==this)return *this;
122 this->fShift=source.fShift;
123 this->fCurrentCell=source.fCurrentCell;
124 this->fFreeCellBuffer=source.fFreeCellBuffer;
125 this->fFlag=source.fFlag;
126 this->fMaskBackward=source.fMaskBackward;
127 this->fFilePosition=source.fFilePosition;
128 this->fMiniHeaderPos=source.fMiniHeaderPos;
129 this->fVerbose=source.fVerbose;
130 for (Int_t i=0;i<5;i++)this->fBuffer[i]=source.fBuffer[i];
134 Int_t AliTPCBuffer160::GetNext(){
135 //It reads a 10 bits word in forward dicection from the Buffer.
136 //A new Buffer is read from the file only when Buffer is empty.
137 //If there aren't elements anymore -1 is returned otherwise
138 //the next element is returned
139 ULong_t mask=0xFFC00000;
143 if (f->tellg()>=(Int_t)fFileEnd) return -1;
144 if ( f->read((char*)fBuffer,sizeof(ULong_t)*5) ){
147 value=fBuffer[fCurrentCell]&mask;
149 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]<<10;
156 value=fBuffer[fCurrentCell]&mask;
159 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]<<10;
162 value=fBuffer[fCurrentCell]&mask;
164 temp=fBuffer[fCurrentCell];
169 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]<<(10-fShift);
176 Int_t AliTPCBuffer160::GetNextBackWord(){
177 //It reads a 10 bits word in backward dicection from the Buffer.
178 //A new Buffer is read from the file only when Buffer is empty.
179 //If there aren't elements anymore -1 is returned otherwise
180 //the next element is returned
185 if (fFilePosition>fMiniHeaderPos){
186 fFilePosition-=sizeof(ULong_t)*5;
187 f->seekg(fFilePosition);
188 f->read((char*)fBuffer,sizeof(ULong_t)*5);
190 //cout<<"Buffer letto"<<endl;
192 char* tt=(char*)fBuffer;
193 for(Int_t ii=0;ii<20;ii++){
195 cout<<ii<<"==> "<<(Int_t)*tt<<endl;
199 cout<<0<<" --- "<<hex<<fBuffer[0]<<dec<<endl;
200 cout<<1<<" --- "<<hex<<fBuffer[1]<<dec<<endl;
201 cout<<2<<" --- "<<hex<<fBuffer[2]<<dec<<endl;
202 cout<<3<<" --- "<<hex<<fBuffer[3]<<dec<<endl;
203 cout<<4<<" --- "<<hex<<fBuffer[4]<<dec<<endl;
204 cout<<"Fine ULong_t"<<endl;
209 value=fBuffer[fCurrentCell]&mask;
210 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]>>10;
214 // f->seekg(fFileEnd);
215 f->seekg(fMiniHeaderPos);
221 value=fBuffer[fCurrentCell]&mask;
223 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]>>10;
226 value=fBuffer[fCurrentCell];
228 temp=fBuffer[fCurrentCell]&mask;
229 temp=temp&fMaskBackward;
230 fMaskBackward=fMaskBackward>>2;
233 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]>>(10-fShift);
240 void AliTPCBuffer160::Flush(){
241 // Flushes the Buffer content
242 if(fFreeCellBuffer!=16){
243 Int_t temp=fFreeCellBuffer;
244 for(Int_t i=0;i<temp;i++){
250 void AliTPCBuffer160::FillBuffer(Int_t Val){
251 //Fills the Buffer with 16 ten bits words and write into a file
255 Val=Val>>(10-fShift);
256 fBuffer[fCurrentCell]|=Val;
263 fBuffer[fCurrentCell]|=Val;
265 //Buffer is written into a file
266 f->write((char*)fBuffer,sizeof(ULong_t)*5);
268 for(Int_t j=0;j<5;j++)fBuffer[j]=0;
274 for(Int_t jj=0;jj<5;jj++){
275 cout.flags(ios::hex);
276 cout<<fBuffer[jj]<<endl;
277 cout.flags(ios::dec);
284 void AliTPCBuffer160::WriteTrailer(Int_t WordsNumber,Int_t PadNumber,Int_t RowNumber,Int_t SecNumber){
285 //Writes a trailer of 40 bits
286 Int_t num=fFreeCellBuffer%4;
287 for(Int_t i=0;i<num;i++){
290 FillBuffer(WordsNumber);
291 FillBuffer(PadNumber);
292 FillBuffer(RowNumber);
293 FillBuffer(SecNumber);
296 void AliTPCBuffer160::ReadTrailer(Int_t &WordsNumber,Int_t &PadNumber,Int_t &RowNumber,Int_t &SecNumber){
297 //Read a trailer of 40 bits in the forward reading mode
298 WordsNumber=GetNext();
305 Int_t AliTPCBuffer160::ReadTrailerBackward(Int_t &WordsNumber,Int_t &PadNumber,Int_t &RowNumber,Int_t &SecNumber){
306 //Read a trailer of 40 bits in the backward reading mode
310 temp=GetNextBackWord();
312 if (temp==-1)return -1;
313 }while (temp==0x2AA);
316 RowNumber=GetNextBackWord();
317 PadNumber=GetNextBackWord();
318 WordsNumber=GetNextBackWord();
322 void AliTPCBuffer160::WriteMiniHeader(ULong_t Size,Int_t SecNumber,Int_t SubSector,Int_t Detector,Int_t Flag ){
323 //Size msg errore sector number sub-sector number 0 for TPC 0 for uncompressed
325 ULong_t miniHeader[3];
328 ddlNumber=SecNumber*2+SubSector;
330 ddlNumber=72+(SecNumber-36)*4+SubSector;
331 // cout<<"DDL number "<<ddlNumber<<endl;
332 for(Int_t i=0;i<3;i++)miniHeader[i]=0;
333 Int_t miniHeaderSize=(sizeof(ULong_t))*3;
334 PackWord(miniHeader[1],Detector,0,7);
335 PackWord(miniHeader[1],0x123456,8,31);
336 PackWord(miniHeader[2],version,0,7);
337 PackWord(miniHeader[2],Flag,8,15);
338 PackWord(miniHeader[2],ddlNumber,16,31);
340 //if size=0 it means that this mini header is a dummi mini header
341 fMiniHeaderPos=f->tellp();
342 //cout<<" Position of the DUMMY MH:"<<fMiniHeaderPos<<" Size:"<<Size<<endl;
344 f->write((char*)(miniHeader),miniHeaderSize);
347 ULong_t currentFilePos=f->tellp();
348 f->seekp(fMiniHeaderPos);
349 Size=currentFilePos-fMiniHeaderPos-miniHeaderSize;
350 //cout<<"Current Position (Next MH) "<<currentFilePos<<" Position of the MH:"<<fMiniHeaderPos<<" Size:"<<Size<<endl;
352 //cout<<"Mini Header Size:"<<miniHeader[0]<<endl;
353 f->write((char*)(miniHeader),miniHeaderSize);
354 f->seekp(currentFilePos);
360 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
362 void AliTPCBuffer160::PackWord(ULong_t &BaseWord, ULong_t Word, Int_t StartBit, Int_t StopBit){
363 //Packs a word into the BaseWord buffer from StartBit bit up to StopBit bit
364 ULong_t dummyWord,offSet;
367 //The BaseWord is being filled with 1 from StartBit to StopBit
368 length=StopBit-StartBit+1;
369 sum=(ULong_t)TMath::Power(2,length)-1;
371 cout<<"WARNING::Word to be filled is not within desired length"<<endl;
376 BaseWord=BaseWord|offSet;
377 //The Word to be filled is shifted to the position StartBit
378 //and the remaining Left and Right bits are filled with 1
379 sum=(ULong_t)TMath::Power(2,StartBit)-1;
380 dummyWord=0xFFFFFFFF<<length;
382 dummyWord<<=StartBit;
384 BaseWord=BaseWord&dummyWord;
388 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
390 void AliTPCBuffer160::UnpackWord(ULong_t PackedWord, Int_t StartBit, Int_t StopBit, ULong_t &Word){
391 //Unpacks a word of StopBit-StartBit+1 bits from PackedWord buffer starting from the position
392 //indicated by StartBit
395 length=StopBit-StartBit+1;
396 offSet=(ULong_t)TMath::Power(2,length)-1;
398 Word=PackedWord&offSet;
403 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////