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 "TObjArray.h"
25 #include "Riostream.h"
27 #include "AliTPCBuffer160.h"
30 ClassImp(AliTPCBuffer160)
32 AliTPCBuffer160::AliTPCBuffer160(const char* fileName,Int_t flag){
33 //if flag = 1 the actual object is used in the write mode
34 //if flag = 0 the actual object is used in the read mode
43 //the buffer is cleaned
44 for (Int_t i=0;i<5;i++)fBuffer[i]=0;
45 //open the output file
47 f.open(fileName,ios::binary|ios::out);
49 f.open(fileName,ios::out);
55 f.open(fileName,ios::binary|ios::in);
57 f.open(fileName,ios::in);
59 if(!f){cout<<"File doesn't exist:"<<fileName<<endl;;exit(-1);}
61 //To get the file dimension (position of the last element in term of bytes)
63 fFilePosition= f.tellg();
64 fFileEnd=fFilePosition;
69 AliTPCBuffer160::~AliTPCBuffer160(){
72 //Flush out the Buffer content at the end only if Buffer wasn't completely filled
75 cout<<"File Created\n";
81 AliTPCBuffer160::AliTPCBuffer160(const AliTPCBuffer160 &source){
83 if(&source==this)return;
84 this->fShift=source.fShift;
85 this->fCurrentCell=source.fCurrentCell;
86 this->fFreeCellBuffer=source.fFreeCellBuffer;
87 this->fFlag=source.fFlag;
88 this->fMaskBackward=source.fMaskBackward;
89 this->fFilePosition=source.fFilePosition;
90 this->fMiniHeaderPos=source.fMiniHeaderPos;
91 this->fVerbose=source.fVerbose;
92 for (Int_t i=0;i<5;i++)this->fBuffer[i]=source.fBuffer[i];
96 AliTPCBuffer160& AliTPCBuffer160::operator=(const AliTPCBuffer160 &source){
98 if(&source==this)return *this;
99 this->fShift=source.fShift;
100 this->fCurrentCell=source.fCurrentCell;
101 this->fFreeCellBuffer=source.fFreeCellBuffer;
102 this->fFlag=source.fFlag;
103 this->fMaskBackward=source.fMaskBackward;
104 this->fFilePosition=source.fFilePosition;
105 this->fMiniHeaderPos=source.fMiniHeaderPos;
106 this->fVerbose=source.fVerbose;
107 for (Int_t i=0;i<5;i++)this->fBuffer[i]=source.fBuffer[i];
111 Int_t AliTPCBuffer160::GetNext(){
112 //It reads a 10 bits word in forward dicection from the Buffer.
113 //A new Buffer is read from the file only when Buffer is empty.
114 //If there aren't elements anymore -1 is returned otherwise
115 //the next element is returned
116 ULong_t mask=0xFFC00000;
120 if ( f.read((char*)fBuffer,sizeof(ULong_t)*5) ){
123 value=fBuffer[fCurrentCell]&mask;
125 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]<<10;
132 value=fBuffer[fCurrentCell]&mask;
135 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]<<10;
138 value=fBuffer[fCurrentCell]&mask;
140 temp=fBuffer[fCurrentCell];
145 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]<<(10-fShift);
152 Int_t AliTPCBuffer160::GetNextBackWord(){
153 //It reads a 10 bits word in backward dicection from the Buffer.
154 //A new Buffer is read from the file only when Buffer is empty.
155 //If there aren't elements anymore -1 is returned otherwise
156 //the next element is returned
162 fFilePosition-=sizeof(ULong_t)*5;
163 f.seekg(fFilePosition);
164 f.read((char*)fBuffer,sizeof(ULong_t)*5);
166 //cout<<"Buffer letto"<<endl;
168 char* tt=(char*)fBuffer;
169 for(Int_t ii=0;ii<20;ii++){
171 cout<<ii<<"==> "<<(Int_t)*tt<<endl;
175 cout<<0<<" --- "<<hex<<fBuffer[0]<<dec<<endl;
176 cout<<1<<" --- "<<hex<<fBuffer[1]<<dec<<endl;
177 cout<<2<<" --- "<<hex<<fBuffer[2]<<dec<<endl;
178 cout<<3<<" --- "<<hex<<fBuffer[3]<<dec<<endl;
179 cout<<4<<" --- "<<hex<<fBuffer[4]<<dec<<endl;
180 cout<<"Fine ULong_t"<<endl;
185 value=fBuffer[fCurrentCell]&mask;
186 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]>>10;
193 value=fBuffer[fCurrentCell]&mask;
195 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]>>10;
198 value=fBuffer[fCurrentCell];
200 temp=fBuffer[fCurrentCell]&mask;
201 temp=temp&fMaskBackward;
202 fMaskBackward=fMaskBackward>>2;
205 fBuffer[fCurrentCell]=fBuffer[fCurrentCell]>>(10-fShift);
212 void AliTPCBuffer160::Flush(){
213 // Flushes the Buffer content
214 if(fFreeCellBuffer!=16){
215 Int_t temp=fFreeCellBuffer;
216 for(Int_t i=0;i<temp;i++){
222 void AliTPCBuffer160::FillBuffer(Int_t Val){
223 //Fills the Buffer with 16 ten bits words and write into a file
227 Val=Val>>(10-fShift);
228 fBuffer[fCurrentCell]|=Val;
235 fBuffer[fCurrentCell]|=Val;
237 //Buffer is written into a file
238 f.write((char*)fBuffer,sizeof(ULong_t)*5);
240 for(Int_t j=0;j<5;j++)fBuffer[j]=0;
246 for(Int_t jj=0;jj<5;jj++){
247 cout.flags(ios::hex);
248 cout<<fBuffer[jj]<<endl;
249 cout.flags(ios::dec);
256 void AliTPCBuffer160::WriteTrailer(Int_t WordsNumber,Int_t PadNumber,Int_t RowNumber,Int_t SecNumber){
257 //Writes a trailer of 40 bits
258 Int_t num=fFreeCellBuffer%4;
259 for(Int_t i=0;i<num;i++){
262 FillBuffer(WordsNumber);
263 FillBuffer(PadNumber);
264 FillBuffer(RowNumber);
265 FillBuffer(SecNumber);
268 void AliTPCBuffer160::ReadTrailer(Int_t &WordsNumber,Int_t &PadNumber,Int_t &RowNumber,Int_t &SecNumber){
269 //Read a trailer of 40 bits in the forward reading mode
270 WordsNumber=GetNext();
277 Int_t AliTPCBuffer160::ReadTrailerBackward(Int_t &WordsNumber,Int_t &PadNumber,Int_t &RowNumber,Int_t &SecNumber){
278 //Read a trailer of 40 bits in the backward reading mode
282 temp=GetNextBackWord();
284 if (temp==-1)return -1;
285 }while (temp==0x2AA);
288 RowNumber=GetNextBackWord();
289 PadNumber=GetNextBackWord();
290 WordsNumber=GetNextBackWord();
294 void AliTPCBuffer160::WriteMiniHeader(ULong_t Size,Int_t SecNumber,Int_t SubSector,Int_t Detector,Int_t Flag ){
295 //Size msg errore sector number sub-sector number 0 for TPC 0 for uncompressed
297 ULong_t miniHeader[3];
300 ddlNumber=SecNumber*2+SubSector;
302 ddlNumber=72+(SecNumber-36)*4+SubSector;
303 // cout<<"DDL number "<<ddlNumber<<endl;
304 for(Int_t i=0;i<3;i++)miniHeader[i]=0;
305 Int_t miniHeaderSize=(sizeof(ULong_t))*3;
306 PackWord(miniHeader[1],Detector,0,7);
307 PackWord(miniHeader[1],0x123456,8,31);
308 PackWord(miniHeader[2],version,0,7);
309 PackWord(miniHeader[2],Flag,8,15);
310 PackWord(miniHeader[2],ddlNumber,16,31);
312 //if size=0 it means that this mini header is a dummi mini header
313 fMiniHeaderPos=f.tellp();
314 //cout<<" Position of the DUMMY MH:"<<fMiniHeaderPos<<" Size:"<<Size<<endl;
316 f.write((char*)(miniHeader),miniHeaderSize);
319 ULong_t currentFilePos=f.tellp();
320 f.seekp(fMiniHeaderPos);
321 Size=currentFilePos-fMiniHeaderPos-miniHeaderSize;
322 //cout<<"Current Position (Next MH) "<<currentFilePos<<" Position of the MH:"<<fMiniHeaderPos<<" Size:"<<Size<<endl;
324 //cout<<"Mini Header Size:"<<miniHeader[0]<<endl;
325 f.write((char*)(miniHeader),miniHeaderSize);
326 f.seekp(currentFilePos);
332 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
334 void AliTPCBuffer160::PackWord(ULong_t &BaseWord, ULong_t Word, Int_t StartBit, Int_t StopBit){
335 //Packs a word into the BaseWord buffer from StartBit bit up to StopBit bit
336 ULong_t dummyWord,offSet;
339 //The BaseWord is being filled with 1 from StartBit to StopBit
340 length=StopBit-StartBit+1;
341 sum=(ULong_t)TMath::Power(2,length)-1;
343 cout<<"WARNING::Word to be filled is not within desired length"<<endl;
348 BaseWord=BaseWord|offSet;
349 //The Word to be filled is shifted to the position StartBit
350 //and the remaining Left and Right bits are filled with 1
351 sum=(ULong_t)TMath::Power(2,StartBit)-1;
352 dummyWord=0xFFFFFFFF<<length;
354 dummyWord<<=StartBit;
356 BaseWord=BaseWord&dummyWord;
360 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
362 void AliTPCBuffer160::UnpackWord(ULong_t PackedWord, Int_t StartBit, Int_t StopBit, ULong_t &Word){
363 //Unpacks a word of StopBit-StartBit+1 bits from PackedWord buffer starting from the position
364 //indicated by StartBit
367 length=StopBit-StartBit+1;
368 offSet=(ULong_t)TMath::Power(2,length)-1;
370 Word=PackedWord&offSet;
375 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////