mas01cr@239: #include "audioDB.h"
mas01cr@239: 
mas01cr@239: /* Make a new database.
mas01cr@239: 
mas01mc@316: IF size(featuredata) < O2_LARGE_ADB_SIZE 
mas01cr@239:    The database consists of:
mas01cr@239: 
mas01cr@239:    * a header (see dbTableHeader struct definition);
mas01cr@239:    * keyTable: list of keys of tracks;
mas01cr@239:    * trackTable: Maps implicit feature index to a feature vector
mas01cr@239:      matrix (sizes of tracks)
mas01cr@239:    * featureTable: Lots of doubles;
mas01cr@239:    * timesTable: (start,end) time points for each feature vector;
mas01cr@239:    * powerTable: associated power for each feature vector;
mas01cr@239:    * l2normTable: squared l2norms for each feature vector.
mas01mc@316:    
mas01mc@316: ELSE the database consists of:
mas01mc@316:    
mas01mc@316:    * a header (see dbTableHeader struct definition);
mas01mc@316:    * keyTable: list of keys of tracks
mas01mc@316:    * trackTable: sizes of tracks
mas01mc@316:    * featureTable: list of feature file names
mas01mc@316:    * timesTable: list of times file names
mas01mc@316:    * powerTable: list of power file names
mas01mc@316: 
mas01cr@239: */
mas01cr@239: 
mas01cr@239: void audioDB::create(const char* dbName){
mas01cr@239:   if ((dbfid = open (dbName, O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) < 0)
mas01cr@239:     error("Can't create database file", dbName, "open");
mas01cr@239:   get_lock(dbfid, 1);
mas01cr@239: 
mas01cr@239:   VERB_LOG(0, "header size: %ju\n", (intmax_t) O2_HEADERSIZE);
mas01cr@239:   
mas01cr@239:   dbH = new dbTableHeaderT();
mas01cr@239:   assert(dbH);
mas01cr@239: 
mas01cr@256:   //unsigned int maxfiles = (unsigned int) rint((double) O2_MAXFILES * (double) size / (double) O2_DEFAULTDBSIZE);
mas01cr@239: 
mas01cr@239:   // Initialize header
mas01cr@239:   dbH->magic = O2_MAGIC;
mas01cr@239:   dbH->version = O2_FORMAT_VERSION;
mas01cr@239:   dbH->numFiles = 0;
mas01cr@239:   dbH->dim = 0;
mas01cr@239:   dbH->flags = 0;
mas01cr@239:   dbH->headerSize = O2_HEADERSIZE;
mas01cr@239:   dbH->length = 0;
mas01cr@239:   dbH->fileTableOffset = ALIGN_PAGE_UP(O2_HEADERSIZE);
mas01cr@256:   dbH->trackTableOffset = ALIGN_PAGE_UP(dbH->fileTableOffset + O2_FILETABLE_ENTRY_SIZE*ntracks);
mas01cr@256:   dbH->dataOffset = ALIGN_PAGE_UP(dbH->trackTableOffset + O2_TRACKTABLE_ENTRY_SIZE*ntracks);
mas01cr@256: 
mas01cr@256:   off_t databytes = ((off_t) datasize) * 1024 * 1024;
mas01cr@256:   off_t auxbytes = databytes / datadim;
mas01cr@256: 
mas01mc@319:   // For backward-compatibility, Record the point-encoding parameter for LSH indexing in the adb header
mas01mc@319:   // If this value is 0 then it will be set to 14
mas01mc@319: 
mas01mc@319: #if O2_LSH_N_POINT_BITS > 15
mas01mc@319: #error "AudioDB Compile ERROR: consistency check of O2_LSH_POINT_BITS failed (>15)"
mas01mc@319: #endif
mas01mc@319:   
mas01mc@319:   dbH->flags |= LSH_N_POINT_BITS << 28;
mas01mc@319: 
mas01mc@316:   // If database will fit in a single file the vectors are copied into the AudioDB instance
mas01mc@316:   // Else all the vectors are left on the FileSystem and we use the dataOffset as storage
mas01mc@316:   // for the location of the features, powers and times files (assuming that arbitrary keys are used for the fileTable)
mas01mc@320:   if(ntracks<O2_LARGE_ADB_NTRACKS && datasize<O2_LARGE_ADB_SIZE){
mas01mc@316:     dbH->timesTableOffset = ALIGN_PAGE_UP(dbH->dataOffset + databytes);
mas01mc@316:     dbH->powerTableOffset = ALIGN_PAGE_UP(dbH->timesTableOffset + 2*auxbytes);
mas01mc@316:     dbH->l2normTableOffset = ALIGN_PAGE_UP(dbH->powerTableOffset + auxbytes);
mas01mc@316:     dbH->dbSize = ALIGN_PAGE_UP(dbH->l2normTableOffset + auxbytes);
mas01mc@316:   }
mas01mc@320:   else{ // Create LARGE_ADB, features and powers kept on filesystem 
mas01mc@316:     dbH->flags |= O2_FLAG_LARGE_ADB;
mas01mc@316:     dbH->timesTableOffset = ALIGN_PAGE_UP(dbH->dataOffset + O2_FILETABLE_ENTRY_SIZE*ntracks);
mas01mc@316:     dbH->powerTableOffset = ALIGN_PAGE_UP(dbH->timesTableOffset + O2_FILETABLE_ENTRY_SIZE*ntracks);
mas01mc@316:     dbH->l2normTableOffset = ALIGN_PAGE_UP(dbH->powerTableOffset + O2_FILETABLE_ENTRY_SIZE*ntracks);
mas01mc@316:     dbH->dbSize = dbH->l2normTableOffset;
mas01mc@316:   } 
mas01cr@239: 
mas01cr@239:   write(dbfid, dbH, O2_HEADERSIZE);
mas01cr@239: 
mas01cr@239:   // go to the location corresponding to the last byte
mas01cr@256:   if (lseek (dbfid, dbH->dbSize - 1, SEEK_SET) == -1)
mas01cr@239:     error("lseek error in db file", "", "lseek");
mas01cr@239: 
mas01cr@239:   // write a dummy byte at the last location
mas01cr@239:   if (write (dbfid, "", 1) != 1)
mas01cr@239:     error("write error", "", "write");
mas01cr@239: 
mas01cr@239:   VERB_LOG(0, "%s %s\n", COM_CREATE, dbName);
mas01cr@239: }
mas01cr@239: