annotate audioDB.cpp @ 118:c0789661f232 endian-neutral

Towards endian-neutrality, part 3.

The feature files have an integer expressing their dimensionality.  If
it's out of bounds, but the byte-swapped version of it isn't, then
assume that we're reading a feature file created on an other-endian
machine, and silently (or verbosely, if verbosity is on) Do The Right
Thing.

#include "audioDB.h"

#if defined(O2_DEBUG)
void sigterm_action(int signal, siginfo_t *info, void *context) {
  exit(128+signal);
}

void sighup_action(int signal, siginfo_t *info, void *context) {
  // FIXME: reread any configuration files
}
#endif

uint32_t uint32_byte_swap(uint32_t arg) {
  return (((arg & 0xff000000) >> 24) |
          ((arg &   0xff0000) >> 8) |
          ((arg &     0xff00) << 8) |
          ((arg &       0xff) << 24));
}

void audioDB::error(const char* a, const char* b, const char *sysFunc) {
  if(isServer) {
    /* FIXME: I think this is leaky -- we never delete err.  actually
       deleting it is tricky, though; it gets placed into some
       soap-internal struct with uncertain extent... -- CSR,
       2007-10-01 */
    char *err = new char[256]; /* FIXME: overflows */
    snprintf(err, 255, "%s: %s\n%s", a, b, sysFunc ? strerror(errno) : "");
    /* FIXME: actually we could usefully do with a properly structured
       type, so that we can throw separate faultstring and details.
       -- CSR, 2007-10-01 */
    throw(err);
  } else {
    cerr << a << ": " << b << endl;
    if (sysFunc) {
      perror(sysFunc);
    }
    exit(1);
  }
}

audioDB::audioDB(const unsigned argc, char* const argv[]): O2_AUDIODB_INITIALIZERS
{
  if(processArgs(argc, argv)<0){
    printf("No command found.\n");
    cmdline_parser_print_version ();
    if (strlen(gengetopt_args_info_purpose) > 0)
      printf("%s\n", gengetopt_args_info_purpose);
    printf("%s\n", gengetopt_args_info_usage);
    printf("%s\n", gengetopt_args_info_help[1]);
    printf("%s\n", gengetopt_args_info_help[2]);
    printf("%s\n", gengetopt_args_info_help[0]);
    exit(1);
  }

  if(O2_ACTION(COM_SERVER))
    startServer();

  else  if(O2_ACTION(COM_CREATE))
    create(dbName);

  else if(O2_ACTION(COM_INSERT))
    insert(dbName, inFile);

  else if(O2_ACTION(COM_BATCHINSERT))
    batchinsert(dbName, inFile);

  else if(O2_ACTION(COM_QUERY))
    if(isClient)
      ws_query(dbName, inFile, (char*)hostport);
    else
      query(dbName, inFile);

  else if(O2_ACTION(COM_STATUS))
    if(isClient)
      ws_status(dbName,(char*)hostport);
    else
      status(dbName);
  
  else if(O2_ACTION(COM_L2NORM))
    l2norm(dbName);
  
  else if(O2_ACTION(COM_DUMP))
    dump(dbName);
  
  else
    error("Unrecognized command",command);
}

audioDB::audioDB(const unsigned argc, char* const argv[], adb__queryResult *adbQueryResult): O2_AUDIODB_INITIALIZERS
{
  try {
    processArgs(argc, argv);
    isServer = 1; // FIXME: Hack
    assert(O2_ACTION(COM_QUERY));
    query(dbName, inFile, adbQueryResult);
  } catch(char *err) {
    cleanup();
    throw(err);
  }
}

audioDB::audioDB(const unsigned argc, char* const argv[], adb__statusResult *adbStatusResult): O2_AUDIODB_INITIALIZERS
{
  try {
    processArgs(argc, argv);
    isServer = 1; // FIXME: Hack
    assert(O2_ACTION(COM_STATUS));
    status(dbName, adbStatusResult);
  } catch(char *err) {
    cleanup();
    throw(err);
  }
}

void audioDB::cleanup() {
  if(indata)
    munmap(indata,statbuf.st_size);
  if(db)
    munmap(db,O2_DEFAULTDBSIZE);
  if(dbfid>0)
    close(dbfid);
  if(infid>0)
    close(infid);
  if(dbH)
    delete dbH;
}

audioDB::~audioDB(){
  cleanup();
}

int audioDB::processArgs(const unsigned argc, char* const argv[]){

  if(argc<2){
    cmdline_parser_print_version ();
    if (strlen(gengetopt_args_info_purpose) > 0)
      printf("%s\n", gengetopt_args_info_purpose);
    printf("%s\n", gengetopt_args_info_usage);
    printf("%s\n", gengetopt_args_info_help[1]);
    printf("%s\n", gengetopt_args_info_help[2]);
    printf("%s\n", gengetopt_args_info_help[0]);
    exit(0);
  }

  if (cmdline_parser (argc, argv, &args_info) != 0)
    exit(1) ;       

  if(args_info.help_given){
    cmdline_parser_print_help();
    exit(0);
  }

  if(args_info.verbosity_given){
    verbosity=args_info.verbosity_arg;
    if(verbosity<0 || verbosity>10){
      cerr << "Warning: verbosity out of range, setting to 1" << endl;
      verbosity=1;
    }
  }

  if(args_info.radius_given){
    radius=args_info.radius_arg;
    if(radius<=0 || radius>1000000000){
      error("radius out of range");
    }
    else 
      if(verbosity>3) {
	cerr << "Setting radius to " << radius << endl;
      }
  }
  
  if(args_info.SERVER_given){
    command=COM_SERVER;
    port=args_info.SERVER_arg;
    if(port<100 || port > 100000)
      error("port out of range");
    isServer=1;
#if defined(O2_DEBUG)
    struct sigaction sa;
    sa.sa_sigaction = sigterm_action;
    sa.sa_flags = SA_SIGINFO | SA_RESTART | SA_NODEFER;
    sigaction(SIGTERM, &sa, NULL);
    sa.sa_sigaction = sighup_action;
    sa.sa_flags = SA_SIGINFO | SA_RESTART | SA_NODEFER;
    sigaction(SIGHUP, &sa, NULL);
#endif
    return 0;
  }

  // No return on client command, find database command
  if(args_info.client_given){
    command=COM_CLIENT;
    hostport=args_info.client_arg;
    isClient=1;
  }

  if(args_info.NEW_given){
    command=COM_CREATE;
    dbName=args_info.database_arg;
    return 0;
  }

  if(args_info.STATUS_given){
    command=COM_STATUS;
    dbName=args_info.database_arg;
    return 0;
  }

  if(args_info.DUMP_given){
    command=COM_DUMP;
    dbName=args_info.database_arg;
    return 0;
  }

  if(args_info.L2NORM_given){
    command=COM_L2NORM;
    dbName=args_info.database_arg;
    return 0;
  }
       
  if(args_info.INSERT_given){
    command=COM_INSERT;
    dbName=args_info.database_arg;
    inFile=args_info.features_arg;
    if(args_info.key_given)
      key=args_info.key_arg;
    if(args_info.times_given){
      timesFileName=args_info.times_arg;
      if(strlen(timesFileName)>0){
        if(!(timesFile = new ifstream(timesFileName,ios::in)))
          error("Could not open times file for reading", timesFileName);
        usingTimes=1;
      }
    }
    return 0;
  }
  
  if(args_info.BATCHINSERT_given){
    command=COM_BATCHINSERT;
    dbName=args_info.database_arg;
    inFile=args_info.featureList_arg;
    if(args_info.keyList_given)
      key=args_info.keyList_arg; // INCONSISTENT NO CHECK

    /* TO DO: REPLACE WITH
      if(args_info.keyList_given){
      trackFileName=args_info.keyList_arg;
      if(strlen(trackFileName)>0 && !(trackFile = new ifstream(trackFileName,ios::in)))
      error("Could not open keyList file for reading",trackFileName);
      }
      AND UPDATE BATCHINSERT()
    */
    
    if(args_info.timesList_given){
      timesFileName=args_info.timesList_arg;
      if(strlen(timesFileName)>0){
        if(!(timesFile = new ifstream(timesFileName,ios::in)))
          error("Could not open timesList file for reading", timesFileName);
        usingTimes=1;
      }
    }
    return 0;
  }
  
  // Query command and arguments
  if(args_info.QUERY_given){
    command=COM_QUERY;
    dbName=args_info.database_arg;
    inFile=args_info.features_arg;
    
    if(args_info.keyList_given){
      trackFileName=args_info.keyList_arg;
      if(strlen(trackFileName)>0 && !(trackFile = new ifstream(trackFileName,ios::in)))
        error("Could not open keyList file for reading",trackFileName);
    }
    
    if(args_info.times_given){
      timesFileName=args_info.times_arg;
      if(strlen(timesFileName)>0){
        if(!(timesFile = new ifstream(timesFileName,ios::in)))
          error("Could not open times file for reading", timesFileName);
        usingTimes=1;
      }
    }
    
    // query type
    if(strncmp(args_info.QUERY_arg, "track", MAXSTR)==0)
      queryType=O2_TRACK_QUERY;
    else if(strncmp(args_info.QUERY_arg, "point", MAXSTR)==0)
      queryType=O2_POINT_QUERY;
    else if(strncmp(args_info.QUERY_arg, "sequence", MAXSTR)==0)
      queryType=O2_SEQUENCE_QUERY;
    else
      error("unsupported query type",args_info.QUERY_arg);
    
    if(!args_info.exhaustive_flag){
      queryPoint = args_info.qpoint_arg;
      usingQueryPoint=1;
      if(queryPoint<0 || queryPoint >10000)
        error("queryPoint out of range: 0 <= queryPoint <= 10000");
    }
    
    pointNN = args_info.pointnn_arg;
    if(pointNN < 1 || pointNN > 1000) {
      error("pointNN out of range: 1 <= pointNN <= 1000");
    }
    trackNN = args_info.resultlength_arg;
    if(trackNN < 1 || trackNN > 1000) {
      error("resultlength out of range: 1 <= resultlength <= 1000");
    }
    sequenceLength = args_info.sequencelength_arg;
    if(sequenceLength < 1 || sequenceLength > 1000) {
      error("seqlen out of range: 1 <= seqlen <= 1000");
    }
    sequenceHop = args_info.sequencehop_arg;
    if(sequenceHop < 1 || sequenceHop > 1000) {
      error("seqhop out of range: 1 <= seqhop <= 1000");
    }
    return 0;
  }
  return -1; // no command found
}

/* Make a new database

   The database consists of:

   header
   ---------------------------------------------------------------------------------
   | magic 4 bytes| numFiles 4 bytes | dim 4 bytes | length 4 bytes |flags 4 bytes |
   ---------------------------------------------------------------------------------
   

   keyTable : list of keys of tracks
   --------------------------------------------------------------------------
   | key 256 bytes                                                          |
   --------------------------------------------------------------------------
   O2_MAXFILES*O2_FILENAMELENGTH

   trackTable : Maps implicit feature index to a feature vector matrix
   --------------------------------------------------------------------------
   | numVectors (4 bytes)                                                   |
   --------------------------------------------------------------------------
   O2_MAXFILES * O2_MEANNUMFEATURES * sizeof(INT)

   featureTable
   --------------------------------------------------------------------------
   | v1 v2 v3 ... vd (double)                                               |
   --------------------------------------------------------------------------
   O2_MAXFILES * O2_MEANNUMFEATURES * DIM * sizeof(DOUBLE)

   timesTable
   --------------------------------------------------------------------------
   | timestamp (double)                                                     |
   --------------------------------------------------------------------------
   O2_MAXFILES * O2_MEANNUMFEATURES * sizeof(DOUBLE)

   l2normTable
   --------------------------------------------------------------------------
   | nm (double)                                                            |
   --------------------------------------------------------------------------
   O2_MAXFILES * O2_MEANNUMFEATURES * sizeof(DOUBLE)

*/

void audioDB::get_lock(int fd, bool exclusive) {
  struct flock lock;
  int status;
  
  lock.l_type = exclusive ? F_WRLCK : F_RDLCK;
  lock.l_whence = SEEK_SET;
  lock.l_start = 0;
  lock.l_len = 0; /* "the whole file" */

 retry:
  do {
    status = fcntl(fd, F_SETLKW, &lock);
  } while (status != 0 && errno == EINTR);

  if (status) {
    if (errno == EAGAIN) {
      sleep(1);
      goto retry;
    } else {
      error("fcntl lock error", "", "fcntl");
    }
  }
}

void audioDB::release_lock(int fd) {
  struct flock lock;
  int status;

  lock.l_type = F_UNLCK;
  lock.l_whence = SEEK_SET;
  lock.l_start = 0;
  lock.l_len = 0;

  status = fcntl(fd, F_SETLKW, &lock);

  if (status)
    error("fcntl unlock error", "", "fcntl");
}

void audioDB::create(const char* dbName){
  if ((dbfid = open (dbName, O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) < 0)
    error("Can't create database file", dbName, "open");
  get_lock(dbfid, 1);

  // go to the location corresponding to the last byte
  if (lseek (dbfid, O2_DEFAULTDBSIZE - 1, SEEK_SET) == -1)
    error("lseek error in db file", "", "lseek");

  // write a dummy byte at the last location
  if (write (dbfid, "", 1) != 1)
    error("write error", "", "write");
  
  // mmap the output file
  if(verbosity) {
    cerr << "header size:" << O2_HEADERSIZE << endl;
  }
  if ((db = (char*) mmap(0, O2_DEFAULTDBSIZE, PROT_READ | PROT_WRITE,
			 MAP_SHARED, dbfid, 0)) == (caddr_t) -1)
    error("mmap error for creating database", "", "mmap");
  
  dbH = new dbTableHeaderT();
  assert(dbH);

  // Initialize header
  dbH->magic = htonl(O2_MAGIC);
  dbH->version = htonl(O2_FORMAT_VERSION);
  dbH->numFiles = 0;
  dbH->dim = 0;
  dbH->flags = 0;
  dbH->length = 0;
  dbH->fileTableOffset = htonl(ALIGN_UP(O2_HEADERSIZE, 8));
  dbH->trackTableOffset = htonl(ALIGN_UP(ntohl(dbH->fileTableOffset) + O2_FILETABLESIZE*O2_MAXFILES, 8));
  dbH->dataOffset = htonl(ALIGN_UP(ntohl(dbH->trackTableOffset) + O2_TRACKTABLESIZE*O2_MAXFILES, 8));
  dbH->l2normTableOffset = htonl(ALIGN_DOWN(O2_DEFAULTDBSIZE - O2_MAXFILES*O2_MEANNUMVECTORS*sizeof(double), 8));
  dbH->timesTableOffset = htonl(ALIGN_DOWN(ntohl(dbH->l2normTableOffset) - O2_MAXFILES*O2_MEANNUMVECTORS*sizeof(double), 8));

  memcpy (db, dbH, O2_HEADERSIZE);
  if(verbosity) {
    cerr << COM_CREATE << " " << dbName << endl;
  }
}

void audioDB::drop(){
  // FIXME: drop something?  Should we even allow this?
}

// initTables - memory map files passed as arguments
// Precondition: database has already been created
void audioDB::initTables(const char* dbName, bool forWrite, const char* inFile = 0) {
  if ((dbfid = open(dbName, forWrite ? O_RDWR : O_RDONLY)) < 0) {
    error("Can't open database file", dbName, "open");
  }
  get_lock(dbfid, forWrite);

  // open the input file
  if (inFile && (infid = open(inFile, O_RDONLY)) < 0) {
    error("can't open input file for reading", inFile, "open");
  }
  // find size of input file
  if (inFile && fstat(infid, &statbuf) < 0) {
    error("fstat error finding size of input", inFile, "fstat");
  }
  // Get the database header info
  dbH = new dbTableHeaderT();
  assert(dbH);
  
  if(read(dbfid, (char *) dbH, O2_HEADERSIZE) != O2_HEADERSIZE) {
    error("error reading db header", dbName, "read");
  }

  if(ntohl(dbH->magic) == O2_OLD_MAGIC) {
    // FIXME: if anyone ever complains, write the program to convert
    // from the old audioDB format to the new...
    error("database file has old O2 header", dbName);
  }

  if(ntohl(dbH->magic) != O2_MAGIC) {
    cerr << "expected: " << O2_MAGIC << ", got: " << ntohl(dbH->magic) << endl;
    error("database file has incorrect header", dbName);
  }

  if(ntohl(dbH->version) != O2_FORMAT_VERSION) {
    error("database file has incorect version", dbName);
  }

  if(inFile) {
    uint32_t inDim;
    read(infid, &inDim, sizeof(uint32_t));
    if (inDim > O2_MAXDIM && uint32_byte_swap(inDim) < O2_MAXDIM) {
      // quite possibly we're being asked to read a feature file
      // generated on the other endianness platform.  Do The Right
      // Thing.  -- CSR, 2007-10-12
      if (verbosity) {
        cerr << "byte swapping dimensionality: " << inDim << endl;
      }
      inDim = uint32_byte_swap(inDim);
    }
    if(ntohl(dbH->dim) == 0 && ntohl(dbH->length) == 0) {
      // empty database: initialize with input dimensionality
      dbH->dim = htonl(inDim);
    } else {
      if(dbH->dim != htonl(inDim)) {      
	cerr << "error: expected dimension: " << ntohl(dbH->dim) << ", got : " << inDim << endl;
	error("feature dimensions do not match database table dimensions");
      }
    }
  }
  
  // mmap the input file 
  if (inFile && (indata = (char*)mmap (0, statbuf.st_size, PROT_READ, MAP_SHARED, infid, 0))
      == (caddr_t) -1)
    error("mmap error for input", inFile, "mmap");

  // mmap the database file
  if ((db = (char*) mmap(0, O2_DEFAULTDBSIZE, PROT_READ | (forWrite ? PROT_WRITE : 0),
			 MAP_SHARED, dbfid, 0)) == (caddr_t) -1)
    error("mmap error for initting tables of database", "", "mmap");

  // Make some handy tables with correct types
  fileTable = (char *)(db + ntohl(dbH->fileTableOffset));
  trackTable = (unsigned *)(db + ntohl(dbH->trackTableOffset));
  dataBuf = (double *)(db + ntohl(dbH->dataOffset));
  l2normTable = (double *)(db + ntohl(dbH->l2normTableOffset));
  timesTable = (double *)(db + ntohl(dbH->timesTableOffset));
}

void audioDB::insert(const char* dbName, const char* inFile){

  initTables(dbName, 1, inFile);

  if(!usingTimes && (ntohl(dbH->flags) & O2_FLAG_TIMES))
    error("Must use timestamps with timestamped database","use --times");

  // Check that there is room for at least 1 more file
  if((char*)timesTable<((char*)dataBuf+ntohl(dbH->length)+statbuf.st_size-sizeof(int)))
    error("No more room in database","insert failed: reason database is full.");
  
  if(!key)
    key=inFile;
  // Linear scan of filenames check for pre-existing feature
  unsigned alreadyInserted=0;
  for(unsigned k=0; k<ntohl(dbH->numFiles); k++)
    if(strncmp(fileTable + k*O2_FILETABLESIZE, key, strlen(key))==0){
      alreadyInserted=1;
      break;
    }

  if(alreadyInserted){
    if(verbosity) {
      cerr << "Warning: key already exists in database, ignoring: " <<inFile << endl;
    }
    return;
  }
  
  // Make a track index table of features to file indexes
  unsigned numVectors = (statbuf.st_size-sizeof(int))/(sizeof(double)*ntohl(dbH->dim));
  if(!numVectors){
    if(verbosity) {
      cerr << "Warning: ignoring zero-length feature vector file:" << key << endl;
    }
    // CLEAN UP
    munmap(indata,statbuf.st_size);
    munmap(db,O2_DEFAULTDBSIZE);
    close(infid);
    return;
  }

  strncpy(fileTable + ntohl(dbH->numFiles)*O2_FILETABLESIZE, key, strlen(key));

  unsigned insertoffset = ntohl(dbH->length);// Store current state

  // Check times status and insert times from file
  unsigned timesoffset=insertoffset/(ntohl(dbH->dim)*sizeof(double));
  double* timesdata=timesTable+timesoffset;
  assert(timesdata+numVectors<l2normTable);
  insertTimeStamps(numVectors, timesFile, timesdata);

  // Increment file count
  dbH->numFiles = htonl(ntohl(dbH->numFiles) + 1);

  // Update Header information
  dbH->length = htonl(ntohl(dbH->length) + (statbuf.st_size-sizeof(int)));

  // Copy the header back to the database
  memcpy (db, dbH, sizeof(dbTableHeaderT));

  // Update track to file index map
  *(trackTable + ntohl(dbH->numFiles) - 1) = htonl(numVectors);

  // Update the feature database
  memcpy (db+ntohl(dbH->dataOffset)+insertoffset, indata+sizeof(int), statbuf.st_size-sizeof(int));
  
  // Norm the vectors on input if the database is already L2 normed
  if(ntohl(dbH->flags) & O2_FLAG_L2NORM)
    unitNormAndInsertL2((double*)(db+ntohl(dbH->dataOffset)+insertoffset), ntohl(dbH->dim), numVectors, 1); // append

  // Report status
  status(dbName);
  if(verbosity) {
    cerr << COM_INSERT << " " << dbName << " " << numVectors << " vectors " 
	 << (statbuf.st_size-sizeof(int)) << " bytes." << endl;
  }

  // CLEAN UP
  munmap(indata,statbuf.st_size);
  close(infid);
}

void audioDB::insertTimeStamps(unsigned numVectors, ifstream* timesFile, double* timesdata){
  unsigned numtimes=0;
 if(usingTimes){
   if(!(ntohl(dbH->flags) & O2_FLAG_TIMES) && !(ntohl(dbH->numFiles)))
     dbH->flags = htonl(ntohl(dbH->flags) | O2_FLAG_TIMES);
   else if(!(ntohl(dbH->flags) & O2_FLAG_TIMES)) {
     cerr << "Warning: timestamp file used with non time-stamped database: ignoring timestamps" << endl;
     usingTimes=0;
   }
   
   if(!timesFile->is_open()){
     if(ntohl(dbH->flags) & O2_FLAG_TIMES){
       munmap(indata,statbuf.st_size);
       munmap(db,O2_DEFAULTDBSIZE);
       error("problem opening times file on timestamped database",timesFileName);
     }
     else{
       cerr << "Warning: problem opening times file. But non-timestamped database, so ignoring times file." << endl;
       usingTimes=0;
     }      
   }

    // Process time file
   if(usingTimes){
     do{
       *timesFile>>*timesdata++;
       if(timesFile->eof())
	 break;
       numtimes++;
     }while(!timesFile->eof() && numtimes<numVectors);
     if(!timesFile->eof()){
	double dummy;
	do{
	  *timesFile>>dummy;
	  if(timesFile->eof())
	    break;
	  numtimes++;
	}while(!timesFile->eof());
     }
     if(numtimes<numVectors || numtimes>numVectors+2){
       munmap(indata,statbuf.st_size);
       munmap(db,O2_DEFAULTDBSIZE);
       close(infid);
       cerr << "expected " << numVectors << " found " << numtimes << endl;
       error("Times file is incorrect length for features file",inFile);
     }
     if(verbosity>2) {
       cerr << "numtimes: " << numtimes << endl;
     }
   }
 }
}

void audioDB::batchinsert(const char* dbName, const char* inFile){

  if ((dbfid = open (dbName, O_RDWR)) < 0)
    error("Can't open database file", dbName, "open");
  get_lock(dbfid, 1);

  if(!key)
    key=inFile;
  ifstream *filesIn = 0;
  ifstream *keysIn = 0;
  ifstream* thisTimesFile = 0;

  if(!(filesIn = new ifstream(inFile)))
    error("Could not open batch in file", inFile);
  if(key && key!=inFile)
    if(!(keysIn = new ifstream(key)))
      error("Could not open batch key file",key);
  
  // Get the database header info
  dbH = new dbTableHeaderT();
  assert(dbH);
  
  if(read(dbfid,(char*)dbH,sizeof(dbTableHeaderT))!=sizeof(dbTableHeaderT))
    error("error reading db header");

  if(!usingTimes && (ntohl(dbH->flags) & O2_FLAG_TIMES))
    error("Must use timestamps with timestamped database","use --times");

  if(ntohl(dbH->magic)!=O2_MAGIC){
    cerr << "expected:" << O2_MAGIC << ", got:" << ntohl(dbH->magic) << endl;
    error("database file has incorrect header",dbName);
  }
  
  unsigned totalVectors=0;
  char *thisKey = new char[MAXSTR];
  char *thisFile = new char[MAXSTR];
  char *thisTimesFileName = new char[MAXSTR];
    
  do{
    filesIn->getline(thisFile,MAXSTR);
    if(key && key!=inFile)
      keysIn->getline(thisKey,MAXSTR);
    else
      thisKey = thisFile;
    if(usingTimes)
      timesFile->getline(thisTimesFileName,MAXSTR);	  
    
    if(filesIn->eof())
      break;

    // open the input file
    if (thisFile && (infid = open (thisFile, O_RDONLY)) < 0)
      error("can't open feature file for reading", thisFile, "open");
  
    // find size of input file
    if (thisFile && fstat (infid,&statbuf) < 0)
      error("fstat error finding size of input", "", "fstat");

    // mmap the database file
    if ((db = (char*) mmap(0, O2_DEFAULTDBSIZE, PROT_READ | PROT_WRITE,
			   MAP_SHARED, dbfid, 0)) == (caddr_t) -1)
      error("mmap error for batchinsert into database", "", "mmap");
    
    // Make some handy tables with correct types
    fileTable= (char*)(db + ntohl(dbH->fileTableOffset));
    trackTable = (unsigned*)(db + ntohl(dbH->trackTableOffset));
    dataBuf  = (double*)(db + ntohl(dbH->dataOffset));
    l2normTable = (double*)(db+ntohl(dbH->l2normTableOffset));
    timesTable = (double*)(db+ntohl(dbH->timesTableOffset));

    // Check that there is room for at least 1 more file
    if((char*)timesTable<((char*)dataBuf+(ntohl(dbH->length)+statbuf.st_size-sizeof(int))))
      error("No more room in database","insert failed: reason database is full.");
    
    if(thisFile) {
      uint32_t thisDim;
      read(infid,&thisDim,sizeof(uint32_t));
      if (thisDim > O2_MAXDIM && uint32_byte_swap(thisDim) < O2_MAXDIM) {
        // quite possibly we're being asked to read a feature file
        // generated on the other endianness platform.  Do The Right
        // Thing.  -- CSR, 2007-10-12
        if (verbosity) {
          cerr << "byte swapping dimensionality: " << thisDim << endl;
        }
        thisDim = uint32_byte_swap(thisDim);
      }
      if(ntohl(dbH->dim) == 0 && ntohl(dbH->length)==0) {
        // empty database: initialize with input dimensionality
        dbH->dim = htonl(thisDim);
      } else {
	if(ntohl(dbH->dim) != thisDim) {      
	  cerr << "error: expected dimension: " << ntohl(dbH->dim) << ", got :" << thisDim <<endl;
	  error("feature dimensions do not match database table dimensions");
	}
      }
    }  
    // mmap the input file 
    if (thisFile && (indata = (char*)mmap (0, statbuf.st_size, PROT_READ, MAP_SHARED, infid, 0))
	== (caddr_t) -1)
      error("mmap error for input", "", "mmap");
  
  
    // Linear scan of filenames check for pre-existing feature
    unsigned alreadyInserted=0;
  
    for(unsigned k=0; k < ntohl(dbH->numFiles); k++)
      if(strncmp(fileTable + k*O2_FILETABLESIZE, thisKey, strlen(thisKey))==0){
	alreadyInserted=1;
	break;
      }
  
    if(alreadyInserted){
      if(verbosity) {
	cerr << "Warning: key already exists in database:" << thisKey << endl;
      }
    }
    else{
  
      // Make a track index table of features to file indexes
      unsigned numVectors = (statbuf.st_size-sizeof(int))/(sizeof(double)*ntohl(dbH->dim));
      if(!numVectors){
	if(verbosity) {
	  cerr << "Warning: ignoring zero-length feature vector file:" << thisKey << endl;
        }
      }
      else{	
	if(usingTimes){
	  if(timesFile->eof())
	    error("not enough timestamp files in timesList");
	  thisTimesFile=new ifstream(thisTimesFileName,ios::in);
	  if(!thisTimesFile->is_open())
	    error("Cannot open timestamp file",thisTimesFileName);
	  unsigned insertoffset= ntohl(dbH->length);
	  unsigned timesoffset=insertoffset/(ntohl(dbH->dim)*sizeof(double));
	  double* timesdata=timesTable+timesoffset;
	  assert(timesdata+numVectors<l2normTable);
	  insertTimeStamps(numVectors,thisTimesFile,timesdata);
	  if(thisTimesFile)
	    delete thisTimesFile;
	}
	  
	strncpy(fileTable + ntohl(dbH->numFiles)*O2_FILETABLESIZE, thisKey, strlen(thisKey));
  
	unsigned insertoffset = ntohl(dbH->length);// Store current state

	// Increment file count
	dbH->numFiles = htonl(ntohl(dbH->numFiles) + 1);  
  
	// Update Header information
	dbH->length = htonl(ntohl(dbH->length) + (statbuf.st_size-sizeof(int)));
	// Copy the header back to the database
	memcpy (db, dbH, sizeof(dbTableHeaderT));
  
	// Update track to file index map
        *(trackTable + ntohl(dbH->numFiles) - 1) = htonl(numVectors);
	
	// Update the feature database
	memcpy (db+ntohl(dbH->dataOffset)+insertoffset, indata+sizeof(int), statbuf.st_size-sizeof(int));
	
	// Norm the vectors on input if the database is already L2 normed
	if(ntohl(dbH->flags) & O2_FLAG_L2NORM)
	  unitNormAndInsertL2((double*)(db+ntohl(dbH->dataOffset)+insertoffset), ntohl(dbH->dim), numVectors, 1); // append
	
	totalVectors+=numVectors;
      }
    }
    // CLEAN UP
    munmap(indata,statbuf.st_size);
    close(infid);
    munmap(db,O2_DEFAULTDBSIZE);
  }while(!filesIn->eof());

  // mmap the database file
  if ((db = (char*) mmap(0, O2_DEFAULTDBSIZE, PROT_READ | PROT_WRITE,
			 MAP_SHARED, dbfid, 0)) == (caddr_t) -1)
    error("mmap error for creating database", "", "mmap");
  
  if(verbosity) {
    cerr << COM_BATCHINSERT << " " << dbName << " " << totalVectors << " vectors " 
	 << totalVectors*ntohl(dbH->dim)*sizeof(double) << " bytes." << endl;
  }
  
  // Report status
  status(dbName);
  
  munmap(db,O2_DEFAULTDBSIZE);
}

// FIXME: this can't propagate the sequence length argument (used for
// dudCount).  See adb__status() definition for the other half of
// this.  -- CSR, 2007-10-01
void audioDB::ws_status(const char*dbName, char* hostport){
  struct soap soap;
  adb__statusResult adbStatusResult;  
  
  // Query an existing adb database
  soap_init(&soap);
  if(soap_call_adb__status(&soap,hostport,NULL,(char*)dbName,adbStatusResult)==SOAP_OK) {
    cout << "numFiles = " << adbStatusResult.numFiles << endl;
    cout << "dim = " << adbStatusResult.dim << endl;
    cout << "length = " << adbStatusResult.length << endl;
    cout << "dudCount = " << adbStatusResult.dudCount << endl;
    cout << "nullCount = " << adbStatusResult.nullCount << endl;
    cout << "flags = " << adbStatusResult.flags << endl;
  } else {
    soap_print_fault(&soap,stderr);
  }
  
  soap_destroy(&soap);
  soap_end(&soap);
  soap_done(&soap);
}

void audioDB::ws_query(const char*dbName, const char *trackKey, const char* hostport){
  struct soap soap;
  adb__queryResult adbQueryResult;  

  soap_init(&soap);  
  if(soap_call_adb__query(&soap,hostport,NULL,
			  (char*)dbName,(char*)trackKey,(char*)trackFileName,(char*)timesFileName,
			  queryType, queryPoint, pointNN, trackNN, sequenceLength, adbQueryResult)==SOAP_OK){
    //std::cerr << "result list length:" << adbQueryResult.__sizeRlist << std::endl;
    for(int i=0; i<adbQueryResult.__sizeRlist; i++)
      std::cout << adbQueryResult.Rlist[i] << " " << adbQueryResult.Dist[i] 
		<< " " << adbQueryResult.Qpos[i] << " " << adbQueryResult.Spos[i] << std::endl;
  }
  else
    soap_print_fault(&soap,stderr);
  
  soap_destroy(&soap);
  soap_end(&soap);
  soap_done(&soap);

}


void audioDB::status(const char* dbName, adb__statusResult *adbStatusResult){
  if(!dbH)
    initTables(dbName, 0, 0);

  unsigned dudCount=0;
  unsigned nullCount=0;
  for(unsigned k=0; k<ntohl(dbH->numFiles); k++){
    if(ntohl(trackTable[k])<sequenceLength){
      dudCount++;
      if(!ntohl(trackTable[k]))
        nullCount++;
    }
  }
  
  if(adbStatusResult == 0) {

    // Update Header information
    cout << "num files:" << ntohl(dbH->numFiles) << endl;
    cout << "data dim:" << ntohl(dbH->dim) <<endl;
    if(ntohl(dbH->dim)>0){
      cout << "total vectors:" << ntohl(dbH->length)/(sizeof(double)*ntohl(dbH->dim))<<endl;
      cout << "vectors available:" << (ntohl(dbH->timesTableOffset)-(ntohl(dbH->dataOffset)+ntohl(dbH->length)))/(sizeof(double)*ntohl(dbH->dim)) << endl;
    }
    cout << "total bytes:" << ntohl(dbH->length) << " (" << (100.0*ntohl(dbH->length))/(ntohl(dbH->timesTableOffset)-ntohl(dbH->dataOffset)) << "%)" << endl;
    cout << "bytes available:" << ntohl(dbH->timesTableOffset)-(ntohl(dbH->dataOffset)+ntohl(dbH->length)) << " (" <<
      (100.0*(ntohl(dbH->timesTableOffset)-(ntohl(dbH->dataOffset)+ntohl(dbH->length))))/(ntohl(dbH->timesTableOffset)-ntohl(dbH->dataOffset)) << "%)" << endl;
    cout << "flags:" << ntohl(dbH->flags) << endl;
    
    cout << "null count: " << nullCount << " small sequence count " << dudCount-nullCount << endl;    
  } else {
    adbStatusResult->numFiles = ntohl(dbH->numFiles);
    adbStatusResult->dim = ntohl(dbH->dim);
    adbStatusResult->length = ntohl(dbH->length);
    adbStatusResult->dudCount = dudCount;
    adbStatusResult->nullCount = nullCount;
    adbStatusResult->flags = ntohl(dbH->flags);
  }
}

void audioDB::dump(const char* dbName){
  if(!dbH)
    initTables(dbName, 0, 0);
  
  for(unsigned k=0, j=0; k<ntohl(dbH->numFiles); k++){
    cout << fileTable+k*O2_FILETABLESIZE << " " << ntohl(trackTable[k]) << endl;
    j+=ntohl(trackTable[k]);
  }

  status(dbName);
}

void audioDB::l2norm(const char* dbName){
  initTables(dbName, true, 0);
  if(ntohl(dbH->length)>0){
    unsigned numVectors = ntohl(dbH->length)/(sizeof(double)*ntohl(dbH->dim));
    unitNormAndInsertL2(dataBuf, ntohl(dbH->dim), numVectors, 0); // No append
  }
  // Update database flags
  dbH->flags = htonl(ntohl(dbH->flags) | O2_FLAG_L2NORM);
  memcpy (db, dbH, O2_HEADERSIZE);
}
  

  
void audioDB::query(const char* dbName, const char* inFile, adb__queryResult *adbQueryResult){  
  switch(queryType){
  case O2_POINT_QUERY:
    pointQuery(dbName, inFile, adbQueryResult);
    break;
  case O2_SEQUENCE_QUERY:
    if(radius==0)
      trackSequenceQueryNN(dbName, inFile, adbQueryResult);
    else
      trackSequenceQueryRad(dbName, inFile, adbQueryResult);
    break;
  case O2_TRACK_QUERY:
    trackPointQuery(dbName, inFile, adbQueryResult);
    break;
  default:
    error("unrecognized queryType in query()");
    
  }  
}

//return ordinal position of key in keyTable
unsigned audioDB::getKeyPos(char* key){  
  for(unsigned k=0; k< ntohl(dbH->numFiles); k++)
    if(strncmp(fileTable + k*O2_FILETABLESIZE, key, strlen(key))==0)
      return k;
  error("Key not found",key);
  return O2_ERR_KEYNOTFOUND;
}

// Basic point query engine
void audioDB::pointQuery(const char* dbName, const char* inFile, adb__queryResult *adbQueryResult){
  
  initTables(dbName, 0, inFile);
  
  // For each input vector, find the closest pointNN matching output vectors and report
  // we use stdout in this stub version
  unsigned numVectors = (statbuf.st_size-sizeof(int))/(sizeof(double)*ntohl(dbH->dim));
    
  double* query = (double*)(indata+sizeof(int));
  double* data = dataBuf;
  double* queryCopy = 0;

  if(ntohl(dbH->flags) & O2_FLAG_L2NORM ){
    // Make a copy of the query
    queryCopy = new double[numVectors*ntohl(dbH->dim)];
    qNorm = new double[numVectors];
    assert(queryCopy&&qNorm);
    memcpy(queryCopy, query, numVectors*ntohl(dbH->dim)*sizeof(double));
    unitNorm(queryCopy, ntohl(dbH->dim), numVectors, qNorm);
    query = queryCopy;
  }

  // Make temporary dynamic memory for results
  assert(pointNN>0 && pointNN<=O2_MAXNN);
  double distances[pointNN];
  unsigned qIndexes[pointNN];
  unsigned sIndexes[pointNN];
  for(unsigned k=0; k<pointNN; k++){
    distances[k]=-DBL_MAX;
    qIndexes[k]=~0;
    sIndexes[k]=~0;    
  }

  unsigned j=numVectors; 
  unsigned k,l,n;
  double thisDist;

  unsigned totalVecs=ntohl(dbH->length)/(ntohl(dbH->dim)*sizeof(double));
  double meanQdur = 0;
  double* timesdata = 0;
  double* dbdurs = 0;

  if(usingTimes && !(ntohl(dbH->flags) & O2_FLAG_TIMES)){
    cerr << "warning: ignoring query timestamps for non-timestamped database" << endl;
    usingTimes=0;
  }

  else if(!usingTimes && (ntohl(dbH->flags) & O2_FLAG_TIMES))
    cerr << "warning: no timestamps given for query. Ignoring database timestamps." << endl;
  
  else if(usingTimes && (ntohl(dbH->flags) & O2_FLAG_TIMES)){
    timesdata = new double[numVectors];
    insertTimeStamps(numVectors, timesFile, timesdata);
    // Calculate durations of points
    for(k=0; k<numVectors-1; k++){
      timesdata[k]=timesdata[k+1]-timesdata[k];
      meanQdur+=timesdata[k];
    }
    meanQdur/=k;
    // Individual exhaustive timepoint durations
    dbdurs = new double[totalVecs];
    for(k=0; k<totalVecs-1; k++)
      dbdurs[k]=timesTable[k+1]-timesTable[k];
    j--; // decrement vector counter by one
  }

  if(usingQueryPoint)
    if(queryPoint>numVectors-1)
      error("queryPoint > numVectors in query");
    else{
      if(verbosity>1) {
	cerr << "query point: " << queryPoint << endl; cerr.flush();
      }
      query=query+queryPoint*ntohl(dbH->dim);
      numVectors=queryPoint+1;
      j=1;
    }

  gettimeofday(&tv1, NULL);   
  while(j--){ // query
    data=dataBuf;
    k=totalVecs; // number of database vectors
    while(k--){  // database
      thisDist=0;
      l=ntohl(dbH->dim);
      double* q=query;
      while(l--)
	thisDist+=*q++**data++;
      if(!usingTimes || 
	 (usingTimes 
	  && fabs(dbdurs[totalVecs-k-1]-timesdata[numVectors-j-1])<timesdata[numVectors-j-1]*timesTol)){
	n=pointNN;
	while(n--){
	  if(thisDist>=distances[n]){
	    if((n==0 || thisDist<=distances[n-1])){
	      // Copy all values above up the queue
	      for( l=pointNN-1 ; l >= n+1 ; l--){
		distances[l]=distances[l-1];
		qIndexes[l]=qIndexes[l-1];
		sIndexes[l]=sIndexes[l-1];	      
	      }
	      distances[n]=thisDist;
	      qIndexes[n]=numVectors-j-1;
	      sIndexes[n]=ntohl(dbH->length)/(sizeof(double)*ntohl(dbH->dim))-k-1;
	      break;
	    }
	  }
	  else
	    break;
	}
      }
    }
    // Move query pointer to next query point
    query+=ntohl(dbH->dim);
  }

  gettimeofday(&tv2, NULL); 
  if(verbosity>1) {
    cerr << endl << " elapsed time:" << ( tv2.tv_sec*1000 + tv2.tv_usec/1000 ) - ( tv1.tv_sec*1000+tv1.tv_usec/1000 ) << " msec" << endl;
  }

  if(adbQueryResult==0){
    // Output answer
    // Loop over nearest neighbours    
    for(k=0; k < pointNN; k++){
      // Scan for key
      unsigned cumTrack=0;
      for(l=0 ; l<ntohl(dbH->numFiles); l++){
	cumTrack+=ntohl(trackTable[l]);
	if(sIndexes[k]<cumTrack){
	  cout << fileTable+l*O2_FILETABLESIZE << " " << distances[k] << " " << qIndexes[k] << " " 
	       << sIndexes[k]+ntohl(trackTable[l])-cumTrack << endl;
	  break;
	}
      }
    }
  }
  else{ // Process Web Services Query
    int listLen;
    for(k = 0; k < pointNN; k++) {
      if(distances[k] == -DBL_MAX)
        break;
    }
    listLen = k;

    adbQueryResult->__sizeRlist=listLen;
    adbQueryResult->__sizeDist=listLen;
    adbQueryResult->__sizeQpos=listLen;
    adbQueryResult->__sizeSpos=listLen;
    adbQueryResult->Rlist= new char*[listLen];
    adbQueryResult->Dist = new double[listLen];
    adbQueryResult->Qpos = new unsigned int[listLen];
    adbQueryResult->Spos = new unsigned int[listLen];
    for(k=0; k<(unsigned)adbQueryResult->__sizeRlist; k++){
      adbQueryResult->Rlist[k]=new char[O2_MAXFILESTR];
      adbQueryResult->Dist[k]=distances[k];
      adbQueryResult->Qpos[k]=qIndexes[k];
      unsigned cumTrack=0;
      for(l=0 ; l<ntohl(dbH->numFiles); l++){
	cumTrack+=ntohl(trackTable[l]);
	if(sIndexes[k]<cumTrack){
	  sprintf(adbQueryResult->Rlist[k], "%s", fileTable+l*O2_FILETABLESIZE);
	  break;
	}
      }
      adbQueryResult->Spos[k]=sIndexes[k]+ntohl(trackTable[l])-cumTrack;
    }
  }
  
  // Clean up
  if(queryCopy)
    delete queryCopy;
  if(qNorm)
    delete qNorm;
  if(timesdata)
    delete timesdata;
  if(dbdurs)
    delete dbdurs;
}

// trackPointQuery  
// return the trackNN closest tracks to the query track
// uses average of pointNN points per track 
void audioDB::trackPointQuery(const char* dbName, const char* inFile, adb__queryResult *adbQueryResult){  
  initTables(dbName, 0, inFile);
  
  // For each input vector, find the closest pointNN matching output vectors and report
  unsigned numVectors = (statbuf.st_size-sizeof(int))/(sizeof(double)*ntohl(dbH->dim));
  double* query = (double*)(indata+sizeof(int));
  double* data = dataBuf;
  double* queryCopy = 0;

  if( ntohl(dbH->flags) & O2_FLAG_L2NORM ){
    // Make a copy of the query
    queryCopy = new double[numVectors*ntohl(dbH->dim)];
    qNorm = new double[numVectors];
    assert(queryCopy&&qNorm);
    memcpy(queryCopy, query, numVectors*ntohl(dbH->dim)*sizeof(double));
    unitNorm(queryCopy, ntohl(dbH->dim), numVectors, qNorm);
    query = queryCopy;
  }

  assert(pointNN>0 && pointNN<=O2_MAXNN);
  assert(trackNN>0 && trackNN<=O2_MAXNN);

  // Make temporary dynamic memory for results
  double trackDistances[trackNN];
  unsigned trackIDs[trackNN];
  unsigned trackQIndexes[trackNN];
  unsigned trackSIndexes[trackNN];

  double distances[pointNN];
  unsigned qIndexes[pointNN];
  unsigned sIndexes[pointNN];

  unsigned j=numVectors; // number of query points
  unsigned k,l,n, track, trackOffset=0, processedTracks=0;
  double thisDist;

  for(k=0; k<pointNN; k++){
    distances[k]=-DBL_MAX;
    qIndexes[k]=~0;
    sIndexes[k]=~0;    
  }

  for(k=0; k<trackNN; k++){
    trackDistances[k]=-DBL_MAX;
    trackQIndexes[k]=~0;
    trackSIndexes[k]=~0;
    trackIDs[k]=~0;
  }

  double meanQdur = 0;
  double* timesdata = 0;
  double* meanDBdur = 0;
  
  if(usingTimes && !(ntohl(dbH->flags) & O2_FLAG_TIMES)){
    cerr << "warning: ignoring query timestamps for non-timestamped database" << endl;
    usingTimes=0;
  }
  
  else if(!usingTimes && (ntohl(dbH->flags) & O2_FLAG_TIMES))
    cerr << "warning: no timestamps given for query. Ignoring database timestamps." << endl;
  
  else if(usingTimes && (ntohl(dbH->flags) & O2_FLAG_TIMES)){
    timesdata = new double[numVectors];
    insertTimeStamps(numVectors, timesFile, timesdata);
    // Calculate durations of points
    for(k=0; k<numVectors-1; k++){
      timesdata[k]=timesdata[k+1]-timesdata[k];
      meanQdur+=timesdata[k];
    }
    meanQdur/=k;
    meanDBdur = new double[ntohl(dbH->numFiles)];
    for(k=0; k<ntohl(dbH->numFiles); k++){
      meanDBdur[k]=0.0;
      for(j=0; j<ntohl(trackTable[k])-1 ; j++)
	meanDBdur[k]+=timesTable[j+1]-timesTable[j];
      meanDBdur[k]/=j;
    }
  }

  if(usingQueryPoint)
    if(queryPoint>numVectors-1)
      error("queryPoint > numVectors in query");
    else{
      if(verbosity>1) {
	cerr << "query point: " << queryPoint << endl; cerr.flush();
      }
      query=query+queryPoint*ntohl(dbH->dim);
      numVectors=queryPoint+1;
    }
  
  // build track offset table
  unsigned *trackOffsetTable = new unsigned[ntohl(dbH->numFiles)];
  unsigned cumTrack=0;
  unsigned trackIndexOffset;
  for(k=0; k<ntohl(dbH->numFiles);k++){
    trackOffsetTable[k]=cumTrack;
    cumTrack+=ntohl(trackTable[k])*ntohl(dbH->dim);
  }

  char nextKey[MAXSTR];

  gettimeofday(&tv1, NULL); 
        
  for(processedTracks=0, track=0 ; processedTracks < ntohl(dbH->numFiles) ; track++, processedTracks++){
    if(trackFile){
      if(!trackFile->eof()){
	trackFile->getline(nextKey,MAXSTR);
	track=getKeyPos(nextKey);
      }
      else
	break;
    }
    trackOffset=trackOffsetTable[track];     // numDoubles offset
    trackIndexOffset=trackOffset/ntohl(dbH->dim); // numVectors offset
    if(verbosity>7) {
      cerr << track << "." << trackOffset/(ntohl(dbH->dim)) << "." << ntohl(trackTable[track]) << " | ";cerr.flush();
    }

    if(ntohl(dbH->flags) & O2_FLAG_L2NORM)
      usingQueryPoint?query=queryCopy+queryPoint*ntohl(dbH->dim):query=queryCopy;
    else
      usingQueryPoint?query=(double*)(indata+sizeof(int))+queryPoint*ntohl(dbH->dim):query=(double*)(indata+sizeof(int));
    if(usingQueryPoint)
      j=1;
    else
      j=numVectors;
    while(j--){
      k=ntohl(trackTable[track]);  // number of vectors in track
      data=dataBuf+trackOffset; // data for track
      while(k--){
	thisDist=0;
	l=ntohl(dbH->dim);
	double* q=query;
	while(l--)
	  thisDist+=*q++**data++;
	if(!usingTimes || 
	   (usingTimes 
	    && fabs(meanDBdur[track]-meanQdur)<meanQdur*timesTol)){
	  n=pointNN;
	  while(n--){
	    if(thisDist>=distances[n]){
	      if((n==0 || thisDist<=distances[n-1])){
		// Copy all values above up the queue
		for( l=pointNN-1 ; l > n ; l--){
		  distances[l]=distances[l-1];
		  qIndexes[l]=qIndexes[l-1];
		  sIndexes[l]=sIndexes[l-1];	      
		}
		distances[n]=thisDist;
		qIndexes[n]=numVectors-j-1;
		sIndexes[n]=ntohl(trackTable[track])-k-1;
		break;
	      }
	    }
	    else
	      break;
	  }
	}
      } // track
      // Move query pointer to next query point
      query+=ntohl(dbH->dim);
    } // query 
    // Take the average of this track's distance
    // Test the track distances
    thisDist=0;
    for (n = 0; n < pointNN; n++) {
      if (distances[n] == -DBL_MAX) break;
      thisDist += distances[n];
    }
    thisDist /= n;

    n=trackNN;
    while(n--){
      if(thisDist>=trackDistances[n]){
	if((n==0 || thisDist<=trackDistances[n-1])){
	  // Copy all values above up the queue
	  for( l=trackNN-1 ; l > n ; l--){
	    trackDistances[l]=trackDistances[l-1];
	    trackQIndexes[l]=trackQIndexes[l-1];
	    trackSIndexes[l]=trackSIndexes[l-1];
	    trackIDs[l]=trackIDs[l-1];
	  }
	  trackDistances[n]=thisDist;
	  trackQIndexes[n]=qIndexes[0];
	  trackSIndexes[n]=sIndexes[0];
	  trackIDs[n]=track;
	  break;
	}
      }
      else
	break;
    }
    for(unsigned k=0; k<pointNN; k++){
      distances[k]=-DBL_MAX;
      qIndexes[k]=~0;
      sIndexes[k]=~0;    
    }
  } // tracks
  gettimeofday(&tv2, NULL); 

  if(verbosity>1) {
    cerr << endl << "processed tracks :" << processedTracks 
	 << " elapsed time:" << ( tv2.tv_sec*1000 + tv2.tv_usec/1000 ) - ( tv1.tv_sec*1000+tv1.tv_usec/1000 ) << " msec" << endl;
  }

  if(adbQueryResult==0){
    if(verbosity>1) {
      cerr<<endl;
    }
    // Output answer
    // Loop over nearest neighbours
    for(k=0; k < min(trackNN,processedTracks); k++)
      cout << fileTable+trackIDs[k]*O2_FILETABLESIZE 
	   << " " << trackDistances[k] << " " << trackQIndexes[k] << " " << trackSIndexes[k] << endl;
  }
  else{ // Process Web Services Query
    int listLen = min(trackNN, processedTracks);
    adbQueryResult->__sizeRlist=listLen;
    adbQueryResult->__sizeDist=listLen;
    adbQueryResult->__sizeQpos=listLen;
    adbQueryResult->__sizeSpos=listLen;
    adbQueryResult->Rlist= new char*[listLen];
    adbQueryResult->Dist = new double[listLen];
    adbQueryResult->Qpos = new unsigned int[listLen];
    adbQueryResult->Spos = new unsigned int[listLen];
    for(k=0; k<(unsigned)adbQueryResult->__sizeRlist; k++){
      adbQueryResult->Rlist[k]=new char[O2_MAXFILESTR];
      adbQueryResult->Dist[k]=trackDistances[k];
      adbQueryResult->Qpos[k]=trackQIndexes[k];
      adbQueryResult->Spos[k]=trackSIndexes[k];
      sprintf(adbQueryResult->Rlist[k], "%s", fileTable+trackIDs[k]*O2_FILETABLESIZE);
    }
  }
    

  // Clean up
  if(trackOffsetTable)
    delete trackOffsetTable;
  if(queryCopy)
    delete queryCopy;
  if(qNorm)
    delete qNorm;
  if(timesdata)
    delete timesdata;
  if(meanDBdur)
    delete meanDBdur;

}


// k nearest-neighbor (k-NN) search between query and target tracks
// efficient implementation based on matched filter
// assumes normed shingles
// outputs distances of retrieved shingles, max retreived = pointNN shingles per per track
void audioDB::trackSequenceQueryNN(const char* dbName, const char* inFile, adb__queryResult *adbQueryResult){
  
  initTables(dbName, 0, inFile);
  
  // For each input vector, find the closest pointNN matching output vectors and report
  // we use stdout in this stub version
  unsigned numVectors = (statbuf.st_size-sizeof(int))/(sizeof(double)*ntohl(dbH->dim));
  double* query = (double*)(indata+sizeof(int));
  double* queryCopy = 0;

  double qMeanL2;
  double* sMeanL2;

  unsigned USE_THRESH=0;
  double SILENCE_THRESH=0;
  double DIFF_THRESH=0;

  if(!(ntohl(dbH->flags) & O2_FLAG_L2NORM) )
    error("Database must be L2 normed for sequence query","use -L2NORM");

  if(numVectors<sequenceLength)
    error("Query shorter than requested sequence length", "maybe use -l");
  
  if(verbosity>1) {
    cerr << "performing norms ... "; cerr.flush();
  }
  unsigned dbVectors = ntohl(dbH->length)/(sizeof(double)*ntohl(dbH->dim));

  // Make a copy of the query
  queryCopy = new double[numVectors*ntohl(dbH->dim)];
  memcpy(queryCopy, query, numVectors*ntohl(dbH->dim)*sizeof(double));
  qNorm = new double[numVectors];
  sNorm = new double[dbVectors];
  sMeanL2=new double[ntohl(dbH->numFiles)];
  assert(qNorm&&sNorm&&queryCopy&&sMeanL2&&sequenceLength);    
  unitNorm(queryCopy, ntohl(dbH->dim), numVectors, qNorm);
  query = queryCopy;

  // Make norm measurements relative to sequenceLength
  unsigned w = sequenceLength-1;
  unsigned i,j;
  double* ps;
  double tmp1,tmp2;

  // Copy the L2 norm values to core to avoid disk random access later on
  memcpy(sNorm, l2normTable, dbVectors*sizeof(double));
  double* snPtr = sNorm;
  for(i=0; i<ntohl(dbH->numFiles); i++){
    if(ntohl(trackTable[i])>=sequenceLength){
      tmp1=*snPtr;
      j=1;
      w=sequenceLength-1;
      while(w--)
	*snPtr+=snPtr[j++];
      ps = snPtr+1;
      w=ntohl(trackTable[i])-sequenceLength; // +1 - 1
      while(w--){
	tmp2=*ps;
	*ps=*(ps-1)-tmp1+*(ps+sequenceLength-1);
	tmp1=tmp2;
	ps++;
      }
      ps = snPtr;
      w=ntohl(trackTable[i])-sequenceLength+1;
      while(w--){
	*ps=sqrt(*ps);
	ps++;
      }
    }
    snPtr+=ntohl(trackTable[i]);
  }
  
  double* pn = sMeanL2;
  w=ntohl(dbH->numFiles);
  while(w--)
    *pn++=0.0;
  ps=sNorm;
  unsigned processedTracks=0;
  for(i=0; i<ntohl(dbH->numFiles); i++){
    if(ntohl(trackTable[i])>sequenceLength-1){
      w = ntohl(trackTable[i])-sequenceLength+1;
      pn = sMeanL2+i;
      *pn=0;
      while(w--)
	if(*ps>0)
	  *pn+=*ps++;
      *pn/=ntohl(trackTable[i])-sequenceLength+1;
      SILENCE_THRESH+=*pn;
      processedTracks++;
    }
    ps = sNorm + ntohl(trackTable[i]);
  }
  if(verbosity>1) {
    cerr << "processedTracks: " << processedTracks << endl;
  }
    
  SILENCE_THRESH/=processedTracks;
  USE_THRESH=1; // Turn thresholding on
  DIFF_THRESH=SILENCE_THRESH; //  mean shingle power
  SILENCE_THRESH/=5; // 20% of the mean shingle power is SILENCE
  if(verbosity>4) {
    cerr << "silence thresh: " << SILENCE_THRESH;
  }
  w=sequenceLength-1;
  i=1;
  tmp1=*qNorm;
  while(w--)
    *qNorm+=qNorm[i++];
  ps = qNorm+1;
  w=numVectors-sequenceLength; // +1 -1
  while(w--){
    tmp2=*ps;
    *ps=*(ps-1)-tmp1+*(ps+sequenceLength-1);
    tmp1=tmp2;
    ps++;
  }
  ps = qNorm;
  qMeanL2 = 0;
  w=numVectors-sequenceLength+1;
  while(w--){
    *ps=sqrt(*ps);
    qMeanL2+=*ps++;
  }
  qMeanL2 /= numVectors-sequenceLength+1;

  if(verbosity>1) {
    cerr << "done." << endl;
  }
  
  if(verbosity>1) {
    cerr << "matching tracks..." << endl;
  }
  
  assert(pointNN>0 && pointNN<=O2_MAXNN);
  assert(trackNN>0 && trackNN<=O2_MAXNN);
  
  // Make temporary dynamic memory for results
  double trackDistances[trackNN];
  unsigned trackIDs[trackNN];
  unsigned trackQIndexes[trackNN];
  unsigned trackSIndexes[trackNN];
  
  double distances[pointNN];
  unsigned qIndexes[pointNN];
  unsigned sIndexes[pointNN];
  

  unsigned k,l,m,n,track,trackOffset=0, HOP_SIZE=sequenceHop, wL=sequenceLength;
  double thisDist;
  
  for(k=0; k<pointNN; k++){
    distances[k]=1.0e6;
    qIndexes[k]=~0;
    sIndexes[k]=~0;    
  }
  
  for(k=0; k<trackNN; k++){
    trackDistances[k]=1.0e6;
    trackQIndexes[k]=~0;
    trackSIndexes[k]=~0;
    trackIDs[k]=~0;
  }

  // Timestamp and durations processing
  double meanQdur = 0;
  double* timesdata = 0;
  double* meanDBdur = 0;
  
  if(usingTimes && !(ntohl(dbH->flags) & O2_FLAG_TIMES)){
    cerr << "warning: ignoring query timestamps for non-timestamped database" << endl;
    usingTimes=0;
  }
  
  else if(!usingTimes && (ntohl(dbH->flags) & O2_FLAG_TIMES))
    cerr << "warning: no timestamps given for query. Ignoring database timestamps." << endl;
  
  else if(usingTimes && (ntohl(dbH->flags) & O2_FLAG_TIMES)){
    timesdata = new double[numVectors];
    assert(timesdata);
    insertTimeStamps(numVectors, timesFile, timesdata);
    // Calculate durations of points
    for(k=0; k<numVectors-1; k++){
      timesdata[k]=timesdata[k+1]-timesdata[k];
      meanQdur+=timesdata[k];
    }
    meanQdur/=k;
    if(verbosity>1) {
      cerr << "mean query file duration: " << meanQdur << endl;
    }
    meanDBdur = new double[ntohl(dbH->numFiles)];
    assert(meanDBdur);
    for(k=0; k<ntohl(dbH->numFiles); k++){
      meanDBdur[k]=0.0;
      for(j=0; j<ntohl(trackTable[k])-1 ; j++)
	meanDBdur[k]+=timesTable[j+1]-timesTable[j];
      meanDBdur[k]/=j;
    }
  }

  if(usingQueryPoint)
    if(queryPoint>numVectors || queryPoint>numVectors-wL+1)
      error("queryPoint > numVectors-wL+1 in query");
    else{
      if(verbosity>1) {
	cerr << "query point: " << queryPoint << endl; cerr.flush();
      }
      query=query+queryPoint*ntohl(dbH->dim);
      qNorm=qNorm+queryPoint;
      numVectors=wL;
    }
  
  double ** D = 0;    // Differences query and target 
  double ** DD = 0;   // Matched filter distance

  D = new double*[numVectors];
  assert(D);
  DD = new double*[numVectors];
  assert(DD);

  gettimeofday(&tv1, NULL); 
  processedTracks=0;
  unsigned successfulTracks=0;

  double* qp;
  double* sp;
  double* dp;

  // build track offset table
  unsigned *trackOffsetTable = new unsigned[ntohl(dbH->numFiles)];
  unsigned cumTrack=0;
  unsigned trackIndexOffset;
  for(k=0; k<ntohl(dbH->numFiles);k++){
    trackOffsetTable[k]=cumTrack;
    cumTrack+=ntohl(trackTable[k])*ntohl(dbH->dim);
  }

  char nextKey [MAXSTR];

  // chi^2 statistics
  double sampleCount = 0;
  double sampleSum = 0;
  double logSampleSum = 0;
  double minSample = 1e9;
  double maxSample = 0;

  // Track loop 
  for(processedTracks=0, track=0 ; processedTracks < ntohl(dbH->numFiles) ; track++, processedTracks++){

    // get trackID from file if using a control file
    if(trackFile){
      if(!trackFile->eof()){
	trackFile->getline(nextKey,MAXSTR);
	track=getKeyPos(nextKey);
      }
      else
	break;
    }

    trackOffset=trackOffsetTable[track];     // numDoubles offset
    trackIndexOffset=trackOffset/ntohl(dbH->dim); // numVectors offset

    if(sequenceLength<=ntohl(trackTable[track])){  // test for short sequences
      
      if(verbosity>7) {
	cerr << track << "." << trackIndexOffset << "." << ntohl(trackTable[track]) << " | ";cerr.flush();
      }
		
      // Sum products matrix
      for(j=0; j<numVectors;j++){
	D[j]=new double[ntohl(trackTable[track])]; 
	assert(D[j]);

      }

      // Matched filter matrix
      for(j=0; j<numVectors;j++){
	DD[j]=new double[ntohl(trackTable[track])];
	assert(DD[j]);
      }

      // Dot product
      for(j=0; j<numVectors; j++)
	for(k=0; k<ntohl(trackTable[track]); k++){
	  qp=query+j*ntohl(dbH->dim);
	  sp=dataBuf+trackOffset+k*ntohl(dbH->dim);
	  DD[j][k]=0.0; // Initialize matched filter array
	  dp=&D[j][k];  // point to correlation cell j,k
	  *dp=0.0;      // initialize correlation cell
	  l=ntohl(dbH->dim);         // size of vectors
	  while(l--)
	    *dp+=*qp++**sp++;
	}
  
      // Matched Filter
      // HOP SIZE == 1
      double* spd;
      if(HOP_SIZE==1){ // HOP_SIZE = shingleHop
	for(w=0; w<wL; w++)
	  for(j=0; j<numVectors-w; j++){ 
	    sp=DD[j];
	    spd=D[j+w]+w;
	    k=ntohl(trackTable[track])-w;
	    while(k--)
	      *sp+++=*spd++;
	  }
      }

      else{ // HOP_SIZE != 1
	for(w=0; w<wL; w++)
	  for(j=0; j<numVectors-w; j+=HOP_SIZE){
	    sp=DD[j];
	    spd=D[j+w]+w;
	    for(k=0; k<ntohl(trackTable[track])-w; k+=HOP_SIZE){
	      *sp+=*spd;
	      sp+=HOP_SIZE;
	      spd+=HOP_SIZE;
	    }
	  }
      }
      
      if(verbosity>3 && usingTimes) {
	cerr << "meanQdur=" << meanQdur << " meanDBdur=" << meanDBdur[track] << endl;
	cerr.flush();
      }

      if(!usingTimes || 
	 (usingTimes 
	  && fabs(meanDBdur[track]-meanQdur)<meanQdur*timesTol)){

	if(verbosity>3 && usingTimes) {
	  cerr << "within duration tolerance." << endl;
	  cerr.flush();
	}

	// Search for minimum distance by shingles (concatenated vectors)
	for(j=0;j<=numVectors-wL;j+=HOP_SIZE)
	  for(k=0;k<=ntohl(trackTable[track])-wL;k+=HOP_SIZE){
	    thisDist=2-(2/(qNorm[j]*sNorm[trackIndexOffset+k]))*DD[j][k];
	    if(verbosity>10) {
	      cerr << thisDist << " " << qNorm[j] << " " << sNorm[trackIndexOffset+k] << endl;
            }
	    // Gather chi^2 statistics
	    if(thisDist<minSample)
	      minSample=thisDist;
	    else if(thisDist>maxSample)
	      maxSample=thisDist;
	    if(thisDist>1e-9){
	      sampleCount++;
	      sampleSum+=thisDist;
	      logSampleSum+=log(thisDist);
	    }

	    // diffL2 = fabs(qNorm[j] - sNorm[trackIndexOffset+k]);
	    // Power test
	    if(!USE_THRESH || 
	       // Threshold on mean L2 of Q and S sequences
	       (USE_THRESH && qNorm[j]>SILENCE_THRESH && sNorm[trackIndexOffset+k]>SILENCE_THRESH && 
		// Are both query and target windows above mean energy?
		(qNorm[j]>qMeanL2*.25 && sNorm[trackIndexOffset+k]>sMeanL2[track]*.25))) // &&  diffL2 < DIFF_THRESH )))
	      thisDist=thisDist; // Computed above
	    else
	      thisDist=1000000.0;

	    // k-NN match algorithm
	    m=pointNN;
	    while(m--){
	      if(thisDist<=distances[m])
		if(m==0 || thisDist>=distances[m-1]){
		// Shuffle distances up the list
		for(l=pointNN-1; l>m; l--){
		  distances[l]=distances[l-1];
		  qIndexes[l]=qIndexes[l-1];
		  sIndexes[l]=sIndexes[l-1];
		}
		distances[m]=thisDist;
		if(usingQueryPoint)
		  qIndexes[m]=queryPoint;
		else
		  qIndexes[m]=j;
		sIndexes[m]=k;
		break;
		}
	    }
	  }
	// Calculate the mean of the N-Best matches
	thisDist=0.0;
	for(m=0; m<pointNN; m++) {
          if (distances[m] == 1000000.0) break;
	  thisDist+=distances[m];
        }
	thisDist/=m;
	
	// Let's see the distances then...
	if(verbosity>3) {
	  cerr << fileTable+track*O2_FILETABLESIZE << " " << thisDist << endl;
        }


	// All the track stuff goes here
	n=trackNN;
	while(n--){
	  if(thisDist<=trackDistances[n]){
	    if((n==0 || thisDist>=trackDistances[n-1])){
	      // Copy all values above up the queue
	      for( l=trackNN-1 ; l > n ; l--){
		trackDistances[l]=trackDistances[l-1];
		trackQIndexes[l]=trackQIndexes[l-1];
		trackSIndexes[l]=trackSIndexes[l-1];
		trackIDs[l]=trackIDs[l-1];
	      }
	      trackDistances[n]=thisDist;
	      trackQIndexes[n]=qIndexes[0];
	      trackSIndexes[n]=sIndexes[0];
	      successfulTracks++;
	      trackIDs[n]=track;
	      break;
	    }
	  }
	  else
	    break;
	}
      } // Duration match
            
      // Clean up current track
      if(D!=NULL){
	for(j=0; j<numVectors; j++)
	  delete[] D[j];
      }

      if(DD!=NULL){
	for(j=0; j<numVectors; j++)
	  delete[] DD[j];
      }
    }
    // per-track reset array values
    for(unsigned k=0; k<pointNN; k++){
      distances[k]=1.0e6;
      qIndexes[k]=~0;
      sIndexes[k]=~0;    
    }
  }

  gettimeofday(&tv2,NULL);
  if(verbosity>1) {
    cerr << endl << "processed tracks :" << processedTracks << " matched tracks: " << successfulTracks << " elapsed time:" 
	 << ( tv2.tv_sec*1000 + tv2.tv_usec/1000 ) - ( tv1.tv_sec*1000+tv1.tv_usec/1000 ) << " msec" << endl;
    cerr << "sampleCount: " << sampleCount << " sampleSum: " << sampleSum << " logSampleSum: " << logSampleSum 
	 << " minSample: " << minSample << " maxSample: " << maxSample << endl;
  }  
  if(adbQueryResult==0){
    if(verbosity>1) {
      cerr<<endl;
    }
    // Output answer
    // Loop over nearest neighbours
    for(k=0; k < min(trackNN,successfulTracks); k++)
      cout << fileTable+trackIDs[k]*O2_FILETABLESIZE << " " << trackDistances[k] << " " 
	   << trackQIndexes[k] << " " << trackSIndexes[k] << endl;
  }
  else{ // Process Web Services Query
    int listLen = min(trackNN, processedTracks);
    adbQueryResult->__sizeRlist=listLen;
    adbQueryResult->__sizeDist=listLen;
    adbQueryResult->__sizeQpos=listLen;
    adbQueryResult->__sizeSpos=listLen;
    adbQueryResult->Rlist= new char*[listLen];
    adbQueryResult->Dist = new double[listLen];
    adbQueryResult->Qpos = new unsigned int[listLen];
    adbQueryResult->Spos = new unsigned int[listLen];
    for(k=0; k<(unsigned)adbQueryResult->__sizeRlist; k++){
      adbQueryResult->Rlist[k]=new char[O2_MAXFILESTR];
      adbQueryResult->Dist[k]=trackDistances[k];
      adbQueryResult->Qpos[k]=trackQIndexes[k];
      adbQueryResult->Spos[k]=trackSIndexes[k];
      sprintf(adbQueryResult->Rlist[k], "%s", fileTable+trackIDs[k]*O2_FILETABLESIZE);
    }
  }


  // Clean up
  if(trackOffsetTable)
    delete[] trackOffsetTable;
  if(queryCopy)
    delete[] queryCopy;
  //if(qNorm)
  //delete qNorm;
  if(D)
    delete[] D;
  if(DD)
    delete[] DD;
  if(timesdata)
    delete[] timesdata;
  if(meanDBdur)
    delete[] meanDBdur;


}

// Radius search between query and target tracks
// efficient implementation based on matched filter
// assumes normed shingles
// outputs count of retrieved shingles, max retreived = one shingle per query shingle per track
void audioDB::trackSequenceQueryRad(const char* dbName, const char* inFile, adb__queryResult *adbQueryResult){
  
  initTables(dbName, 0, inFile);
  
  // For each input vector, find the closest pointNN matching output vectors and report
  // we use stdout in this stub version
  unsigned numVectors = (statbuf.st_size-sizeof(int))/(sizeof(double)*ntohl(dbH->dim));
  double* query = (double*)(indata+sizeof(int));
  double* queryCopy = 0;

  double qMeanL2;
  double* sMeanL2;

  unsigned USE_THRESH=0;
  double SILENCE_THRESH=0;
  double DIFF_THRESH=0;

  if(!(ntohl(dbH->flags) & O2_FLAG_L2NORM) )
    error("Database must be L2 normed for sequence query","use -l2norm");
  
  if(verbosity>1) {
    cerr << "performing norms ... "; cerr.flush();
  }
  unsigned dbVectors = ntohl(dbH->length)/(sizeof(double)*ntohl(dbH->dim));

  // Make a copy of the query
  queryCopy = new double[numVectors*ntohl(dbH->dim)];
  memcpy(queryCopy, query, numVectors*ntohl(dbH->dim)*sizeof(double));
  qNorm = new double[numVectors];
  sNorm = new double[dbVectors];
  sMeanL2=new double[ntohl(dbH->numFiles)];
  assert(qNorm&&sNorm&&queryCopy&&sMeanL2&&sequenceLength);    
  unitNorm(queryCopy, ntohl(dbH->dim), numVectors, qNorm);
  query = queryCopy;

  // Make norm measurements relative to sequenceLength
  unsigned w = sequenceLength-1;
  unsigned i,j;
  double* ps;
  double tmp1,tmp2;

  // Copy the L2 norm values to core to avoid disk random access later on
  memcpy(sNorm, l2normTable, dbVectors*sizeof(double));
  double* snPtr = sNorm;
  for(i=0; i<ntohl(dbH->numFiles); i++){
    if(ntohl(trackTable[i])>=sequenceLength){
      tmp1=*snPtr;
      j=1;
      w=sequenceLength-1;
      while(w--)
	*snPtr+=snPtr[j++];
      ps = snPtr+1;
      w=ntohl(trackTable[i])-sequenceLength; // +1 - 1
      while(w--){
	tmp2=*ps;
	*ps=*(ps-1)-tmp1+*(ps+sequenceLength-1);
	tmp1=tmp2;
	ps++;
      }
      ps = snPtr;
      w=ntohl(trackTable[i])-sequenceLength+1;
      while(w--){
	*ps=sqrt(*ps);
	ps++;
      }
    }
    snPtr+=ntohl(trackTable[i]);
  }
  
  double* pn = sMeanL2;
  w=ntohl(dbH->numFiles);
  while(w--)
    *pn++=0.0;
  ps=sNorm;
  unsigned processedTracks=0;
  for(i=0; i<ntohl(dbH->numFiles); i++){
    if(ntohl(trackTable[i])>sequenceLength-1){
      w = ntohl(trackTable[i])-sequenceLength+1;
      pn = sMeanL2+i;
      *pn=0;
      while(w--)
	if(*ps>0)
	  *pn+=*ps++;
      *pn/=ntohl(trackTable[i])-sequenceLength+1;
      SILENCE_THRESH+=*pn;
      processedTracks++;
    }
    ps = sNorm + ntohl(trackTable[i]);
  }
  if(verbosity>1) {
    cerr << "processedTracks: " << processedTracks << endl;
  }
    
  SILENCE_THRESH/=processedTracks;
  USE_THRESH=1; // Turn thresholding on
  DIFF_THRESH=SILENCE_THRESH; //  mean shingle power
  SILENCE_THRESH/=5; // 20% of the mean shingle power is SILENCE
  if(verbosity>4) {
    cerr << "silence thresh: " << SILENCE_THRESH;
  }
  w=sequenceLength-1;
  i=1;
  tmp1=*qNorm;
  while(w--)
    *qNorm+=qNorm[i++];
  ps = qNorm+1;
  w=numVectors-sequenceLength; // +1 -1
  while(w--){
    tmp2=*ps;
    *ps=*(ps-1)-tmp1+*(ps+sequenceLength-1);
    tmp1=tmp2;
    ps++;
  }
  ps = qNorm;
  qMeanL2 = 0;
  w=numVectors-sequenceLength+1;
  while(w--){
    *ps=sqrt(*ps);
    qMeanL2+=*ps++;
  }
  qMeanL2 /= numVectors-sequenceLength+1;

  if(verbosity>1) {
    cerr << "done." << endl;    
  }
  
  if(verbosity>1) {
    cerr << "matching tracks..." << endl;
  }
  
  assert(pointNN>0 && pointNN<=O2_MAXNN);
  assert(trackNN>0 && trackNN<=O2_MAXNN);
  
  // Make temporary dynamic memory for results
  double trackDistances[trackNN];
  unsigned trackIDs[trackNN];
  unsigned trackQIndexes[trackNN];
  unsigned trackSIndexes[trackNN];
  
  double distances[pointNN];
  unsigned qIndexes[pointNN];
  unsigned sIndexes[pointNN];
  

  unsigned k,l,n,track,trackOffset=0, HOP_SIZE=sequenceHop, wL=sequenceLength;
  double thisDist;
  
  for(k=0; k<pointNN; k++){
    distances[k]=0.0;
    qIndexes[k]=~0;
    sIndexes[k]=~0;    
  }
  
  for(k=0; k<trackNN; k++){
    trackDistances[k]=0.0;
    trackQIndexes[k]=~0;
    trackSIndexes[k]=~0;
    trackIDs[k]=~0;
  }

  // Timestamp and durations processing
  double meanQdur = 0;
  double* timesdata = 0;
  double* meanDBdur = 0;
  
  if(usingTimes && !(ntohl(dbH->flags) & O2_FLAG_TIMES)){
    cerr << "warning: ignoring query timestamps for non-timestamped database" << endl;
    usingTimes=0;
  }
  
  else if(!usingTimes && (ntohl(dbH->flags) & O2_FLAG_TIMES))
    cerr << "warning: no timestamps given for query. Ignoring database timestamps." << endl;
  
  else if(usingTimes && (ntohl(dbH->flags) & O2_FLAG_TIMES)){
    timesdata = new double[numVectors];
    assert(timesdata);
    insertTimeStamps(numVectors, timesFile, timesdata);
    // Calculate durations of points
    for(k=0; k<numVectors-1; k++){
      timesdata[k]=timesdata[k+1]-timesdata[k];
      meanQdur+=timesdata[k];
    }
    meanQdur/=k;
    if(verbosity>1) {
      cerr << "mean query file duration: " << meanQdur << endl;
    }
    meanDBdur = new double[ntohl(dbH->numFiles)];
    assert(meanDBdur);
    for(k=0; k<ntohl(dbH->numFiles); k++){
      meanDBdur[k]=0.0;
      for(j=0; j<ntohl(trackTable[k])-1 ; j++)
	meanDBdur[k]+=timesTable[j+1]-timesTable[j];
      meanDBdur[k]/=j;
    }
  }

  if(usingQueryPoint)
    if(queryPoint>numVectors || queryPoint>numVectors-wL+1)
      error("queryPoint > numVectors-wL+1 in query");
    else{
      if(verbosity>1) {
	cerr << "query point: " << queryPoint << endl; cerr.flush();
      }
      query=query+queryPoint*ntohl(dbH->dim);
      qNorm=qNorm+queryPoint;
      numVectors=wL;
    }
  
  double ** D = 0;    // Differences query and target 
  double ** DD = 0;   // Matched filter distance

  D = new double*[numVectors];
  assert(D);
  DD = new double*[numVectors];
  assert(DD);

  gettimeofday(&tv1, NULL); 
  processedTracks=0;
  unsigned successfulTracks=0;

  double* qp;
  double* sp;
  double* dp;

  // build track offset table
  unsigned *trackOffsetTable = new unsigned[ntohl(dbH->numFiles)];
  unsigned cumTrack=0;
  unsigned trackIndexOffset;
  for(k=0; k<ntohl(dbH->numFiles);k++){
    trackOffsetTable[k]=cumTrack;
    cumTrack+=ntohl(trackTable[k])*ntohl(dbH->dim);
  }

  char nextKey [MAXSTR];

  // chi^2 statistics
  double sampleCount = 0;
  double sampleSum = 0;
  double logSampleSum = 0;
  double minSample = 1e9;
  double maxSample = 0;

  // Track loop 
  for(processedTracks=0, track=0 ; processedTracks < ntohl(dbH->numFiles) ; track++, processedTracks++){

    // get trackID from file if using a control file
    if(trackFile){
      if(!trackFile->eof()){
	trackFile->getline(nextKey,MAXSTR);
	track=getKeyPos(nextKey);
      }
      else
	break;
    }

    trackOffset=trackOffsetTable[track];     // numDoubles offset
    trackIndexOffset=trackOffset/ntohl(dbH->dim); // numVectors offset

    if(sequenceLength<=ntohl(trackTable[track])){  // test for short sequences
      
      if(verbosity>7) {
	cerr << track << "." << trackIndexOffset << "." << ntohl(trackTable[track]) << " | ";cerr.flush();
      }

      // Sum products matrix
      for(j=0; j<numVectors;j++){
	D[j]=new double[ntohl(trackTable[track])]; 
	assert(D[j]);

      }

      // Matched filter matrix
      for(j=0; j<numVectors;j++){
	DD[j]=new double[ntohl(trackTable[track])];
	assert(DD[j]);
      }

      // Dot product
      for(j=0; j<numVectors; j++)
	for(k=0; k<ntohl(trackTable[track]); k++){
	  qp=query+j*ntohl(dbH->dim);
	  sp=dataBuf+trackOffset+k*ntohl(dbH->dim);
	  DD[j][k]=0.0; // Initialize matched filter array
	  dp=&D[j][k];  // point to correlation cell j,k
	  *dp=0.0;      // initialize correlation cell
	  l=ntohl(dbH->dim);         // size of vectors
	  while(l--)
	    *dp+=*qp++**sp++;
	}
  
      // Matched Filter
      // HOP SIZE == 1
      double* spd;
      if(HOP_SIZE==1){ // HOP_SIZE = shingleHop
	for(w=0; w<wL; w++)
	  for(j=0; j<numVectors-w; j++){ 
	    sp=DD[j];
	    spd=D[j+w]+w;
	    k=ntohl(trackTable[track])-w;
	    while(k--)
	      *sp+++=*spd++;
	  }
      }

      else{ // HOP_SIZE != 1
	for(w=0; w<wL; w++)
	  for(j=0; j<numVectors-w; j+=HOP_SIZE){
	    sp=DD[j];
	    spd=D[j+w]+w;
	    for(k=0; k<ntohl(trackTable[track])-w; k+=HOP_SIZE){
	      *sp+=*spd;
	      sp+=HOP_SIZE;
	      spd+=HOP_SIZE;
	    }
	  }
      }
      
      if(verbosity>3 && usingTimes) {
	cerr << "meanQdur=" << meanQdur << " meanDBdur=" << meanDBdur[track] << endl;
	cerr.flush();
      }

      if(!usingTimes || 
	 (usingTimes 
	  && fabs(meanDBdur[track]-meanQdur)<meanQdur*timesTol)){

	if(verbosity>3 && usingTimes) {
	  cerr << "within duration tolerance." << endl;
	  cerr.flush();
	}

	// Search for minimum distance by shingles (concatenated vectors)
	for(j=0;j<=numVectors-wL;j+=HOP_SIZE)
	  for(k=0;k<=ntohl(trackTable[track])-wL;k+=HOP_SIZE){
	    thisDist=2-(2/(qNorm[j]*sNorm[trackIndexOffset+k]))*DD[j][k];
	    if(verbosity>10) {
	      cerr << thisDist << " " << qNorm[j] << " " << sNorm[trackIndexOffset+k] << endl;
            }
	    // Gather chi^2 statistics
	    if(thisDist<minSample)
	      minSample=thisDist;
	    else if(thisDist>maxSample)
	      maxSample=thisDist;
	    if(thisDist>1e-9){
	      sampleCount++;
	      sampleSum+=thisDist;
	      logSampleSum+=log(thisDist);
	    }

	    // diffL2 = fabs(qNorm[j] - sNorm[trackIndexOffset+k]);
	    // Power test
	    if(!USE_THRESH || 
	       // Threshold on mean L2 of Q and S sequences
	       (USE_THRESH && qNorm[j]>SILENCE_THRESH && sNorm[trackIndexOffset+k]>SILENCE_THRESH && 
		// Are both query and target windows above mean energy?
		(qNorm[j]>qMeanL2*.25 && sNorm[trackIndexOffset+k]>sMeanL2[track]*.25))) // &&  diffL2 < DIFF_THRESH )))
	      thisDist=thisDist; // Computed above
	    else
	      thisDist=1000000.0;
	    if(thisDist>=0 && thisDist<=radius){
	      distances[0]++; // increment count
	      break; // only need one track point per query point
	    }
	  }
	// How many points were below threshold ?
	thisDist=distances[0];
	
	// Let's see the distances then...
	if(verbosity>3) {
	  cerr << fileTable+track*O2_FILETABLESIZE << " " << thisDist << endl;
        }

	// All the track stuff goes here
	n=trackNN;
	while(n--){
	  if(thisDist>trackDistances[n]){
	    if((n==0 || thisDist<=trackDistances[n-1])){
	      // Copy all values above up the queue
	      for( l=trackNN-1 ; l > n ; l--){
		trackDistances[l]=trackDistances[l-1];
		trackQIndexes[l]=trackQIndexes[l-1];
		trackSIndexes[l]=trackSIndexes[l-1];
		trackIDs[l]=trackIDs[l-1];
	      }
	      trackDistances[n]=thisDist;
	      trackQIndexes[n]=qIndexes[0];
	      trackSIndexes[n]=sIndexes[0];
	      successfulTracks++;
	      trackIDs[n]=track;
	      break;
	    }
	  }
	  else
	    break;
	}
      } // Duration match
            
      // Clean up current track
      if(D!=NULL){
	for(j=0; j<numVectors; j++)
	  delete[] D[j];
      }

      if(DD!=NULL){
	for(j=0; j<numVectors; j++)
	  delete[] DD[j];
      }
    }
    // per-track reset array values
    for(unsigned k=0; k<pointNN; k++){
      distances[k]=0.0;
      qIndexes[k]=~0;
      sIndexes[k]=~0;    
    }
  }

  gettimeofday(&tv2,NULL);
  if(verbosity>1) {
    cerr << endl << "processed tracks :" << processedTracks << " matched tracks: " << successfulTracks << " elapsed time:" 
	 << ( tv2.tv_sec*1000 + tv2.tv_usec/1000 ) - ( tv1.tv_sec*1000+tv1.tv_usec/1000 ) << " msec" << endl;
    cerr << "sampleCount: " << sampleCount << " sampleSum: " << sampleSum << " logSampleSum: " << logSampleSum 
	 << " minSample: " << minSample << " maxSample: " << maxSample << endl;
  }
  
  if(adbQueryResult==0){
    if(verbosity>1) {
      cerr<<endl;
    }
    // Output answer
    // Loop over nearest neighbours
    for(k=0; k < min(trackNN,successfulTracks); k++)
      cout << fileTable+trackIDs[k]*O2_FILETABLESIZE << " " << trackDistances[k] << endl;
  }
  else{ // Process Web Services Query
    int listLen = min(trackNN, processedTracks);
    adbQueryResult->__sizeRlist=listLen;
    adbQueryResult->__sizeDist=listLen;
    adbQueryResult->__sizeQpos=listLen;
    adbQueryResult->__sizeSpos=listLen;
    adbQueryResult->Rlist= new char*[listLen];
    adbQueryResult->Dist = new double[listLen];
    adbQueryResult->Qpos = new unsigned int[listLen];
    adbQueryResult->Spos = new unsigned int[listLen];
    for(k=0; k<(unsigned)adbQueryResult->__sizeRlist; k++){
      adbQueryResult->Rlist[k]=new char[O2_MAXFILESTR];
      adbQueryResult->Dist[k]=trackDistances[k];
      adbQueryResult->Qpos[k]=trackQIndexes[k];
      adbQueryResult->Spos[k]=trackSIndexes[k];
      sprintf(adbQueryResult->Rlist[k], "%s", fileTable+trackIDs[k]*O2_FILETABLESIZE);
    }
  }


  // Clean up
  if(trackOffsetTable)
    delete[] trackOffsetTable;
  if(queryCopy)
    delete[] queryCopy;
  //if(qNorm)
  //delete qNorm;
  if(D)
    delete[] D;
  if(DD)
    delete[] DD;
  if(timesdata)
    delete[] timesdata;
  if(meanDBdur)
    delete[] meanDBdur;


}

// Unit norm block of features
void audioDB::unitNorm(double* X, unsigned dim, unsigned n, double* qNorm){
  unsigned d;
  double L2, *p;
  if(verbosity>2) {
    cerr << "norming " << n << " vectors...";cerr.flush();
  }
  while(n--){
    p=X;
    L2=0.0;
    d=dim;
    while(d--){
      L2+=*p**p;
      p++;
    }
    /*    L2=sqrt(L2);*/
    if(qNorm)
      *qNorm++=L2;
    /*
    oneOverL2 = 1.0/L2;
    d=dim;
    while(d--){
      *X*=oneOverL2;
      X++;
    */
    X+=dim;
  }
  if(verbosity>2) {
    cerr << "done..." << endl;
  }
}

// Unit norm block of features
void audioDB::unitNormAndInsertL2(double* X, unsigned dim, unsigned n, unsigned append=0){
  unsigned d;
  double *p;
  unsigned nn = n;

  assert(l2normTable);

  if( !append && (ntohl(dbH->flags) & O2_FLAG_L2NORM) )
    error("Database is already L2 normed", "automatic norm on insert is enabled");

  if(verbosity>2) {
    cerr << "norming " << n << " vectors...";cerr.flush();
  }

  double* l2buf = new double[n];
  double* l2ptr = l2buf;
  assert(l2buf);
  assert(X);

  while(nn--){
    p=X;
    *l2ptr=0.0;
    d=dim;
    while(d--){
      *l2ptr+=*p**p;
      p++;
    }
    l2ptr++;
    /*
      oneOverL2 = 1.0/(*l2ptr++);
      d=dim;
      while(d--){
      *X*=oneOverL2;
      X++;
      }
    */
    X+=dim;
  }
  unsigned offset;
  if(append) {
    // FIXME: a hack, a very palpable hack: the vectors have already
    // been inserted, and dbH->length has already been updated.  We
    // need to subtract off again the number of vectors that we've
    // inserted this time...
    offset=(ntohl(dbH->length)/(ntohl(dbH->dim)*sizeof(double)))-n; // number of vectors
  } else {
    offset=0;
  }
  memcpy(l2normTable+offset, l2buf, n*sizeof(double));
  if(l2buf)
    delete[] l2buf;
  if(verbosity>2) {
    cerr << "done..." << endl;
  }
}


// Start an audioDB server on the host
void audioDB::startServer(){
  struct soap soap;
  int m, s; // master and slave sockets
  soap_init(&soap);
  // FIXME: largely this use of SO_REUSEADDR is to make writing (and
  // running) test cases more convenient, so that multiple test runs
  // in close succession don't fail because of a bin() error.
  // Investigate whether there are any potential drawbacks in this,
  // and also whether there's a better way to write the tests.  --
  // CSR, 2007-10-03
  soap.bind_flags |= SO_REUSEADDR;
  m = soap_bind(&soap, NULL, port, 100);
  if (m < 0)
    soap_print_fault(&soap, stderr);
  else
    {
      fprintf(stderr, "Socket connection successful: master socket = %d\n", m);
      for (int i = 1; ; i++)
	{
	  s = soap_accept(&soap);
	  if (s < 0)
	    {
	      soap_print_fault(&soap, stderr);
	      break;
	    }
	  fprintf(stderr, "%d: accepted connection from IP=%lu.%lu.%lu.%lu socket=%d\n", i,
		  (soap.ip >> 24)&0xFF, (soap.ip >> 16)&0xFF, (soap.ip >> 8)&0xFF, soap.ip&0xFF, s);
	  if (soap_serve(&soap) != SOAP_OK) // process RPC request
	    soap_print_fault(&soap, stderr); // print error
	  fprintf(stderr, "request served\n");
	  soap_destroy(&soap); // clean up class instances
	  soap_end(&soap); // clean up everything and close socket
	}
    }
  soap_done(&soap); // close master socket and detach environment
} 


// web services

// SERVER SIDE
int adb__status(struct soap* soap, xsd__string dbName, adb__statusResult &adbStatusResult){
  char* const argv[]={"audioDB",COM_STATUS,"-d",dbName};
  const unsigned argc = 4;
  try {
    audioDB(argc, argv, &adbStatusResult);
    return SOAP_OK;
  } catch(char *err) {
    soap_receiver_fault(soap, err, "");
    return SOAP_FAULT;
  }
}

// Literal translation of command line to web service

int adb__query(struct soap* soap, xsd__string dbName, xsd__string qKey, xsd__string keyList, xsd__string timesFileName, xsd__int qType, xsd__int qPos, xsd__int pointNN, xsd__int trackNN, xsd__int seqLen, adb__queryResult &adbQueryResult){
  char queryType[256];
  for(int k=0; k<256; k++)
    queryType[k]='\0';
  if(qType == O2_POINT_QUERY)
    strncpy(queryType, "point", strlen("point"));
  else if (qType == O2_SEQUENCE_QUERY)
    strncpy(queryType, "sequence", strlen("sequence"));
  else if(qType == O2_TRACK_QUERY)
    strncpy(queryType,"track", strlen("track"));
  else
    strncpy(queryType, "", strlen(""));

  if(pointNN==0)
    pointNN=10;
  if(trackNN==0)
    trackNN=10;
  if(seqLen==0)
    seqLen=16;

  char qPosStr[256];
  sprintf(qPosStr, "%d", qPos);
  char pointNNStr[256];
  sprintf(pointNNStr,"%d",pointNN);
  char trackNNStr[256];
  sprintf(trackNNStr,"%d",trackNN);
  char seqLenStr[256];  
  sprintf(seqLenStr,"%d",seqLen);
  
  const  char* argv[] ={
    "./audioDB", 
    COM_QUERY, 
    queryType, // Need to pass a parameter
    COM_DATABASE,
    dbName, 
    COM_FEATURES,
    qKey, 
    COM_KEYLIST,
    keyList==0?"":keyList,
    COM_TIMES,
    timesFileName==0?"":timesFileName,
    COM_QPOINT, 
    qPosStr,
    COM_POINTNN,
    pointNNStr,
    COM_TRACKNN,
    trackNNStr, // Need to pass a parameter
    COM_SEQLEN,
    seqLenStr
  };

  const unsigned argc = 19;
  try {
    audioDB(argc, (char* const*)argv, &adbQueryResult);
    return SOAP_OK;
  } catch (char *err) {
    soap_receiver_fault(soap, err, "");
    return SOAP_FAULT;
  }
}

int main(const unsigned argc, char* const argv[]){
  audioDB(argc, argv);
}