readfrfile.cc

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/*---------------------------------------------------------------------
 * Package:     Wavelet Analysis Tool
 * File name:   readfrfile.cc
 * Authors: S.Klimenko, A.Sazonov : University of Florida, Gainesville
 *
 * Virgo Frame Library rev. >= 4.41 is required.
 *---------------------------------------------------------------------
*/

#include "readfrfile.hh"

// Function ReadFrFile transparently reads both WAT-compressed
// and standard-compressed ADC data from single frame file.
// wavearray<double> - output array,
// tlen - length of data in seconds,
// tskip - skip time from the begining of the file, in seconds
// *cname - ADC channel name
// *fname - frame file name
// seek - if true then it is allowed to seek data continuation
//        in next file which name the function will try to guess
bool ReadFrFile(wavearray<double> &out,
      double tlen, 
      double tskip, 
      char *cname, 
      char *fname, 
      bool seek,
      char *channel_type)
{
  FrFile *iFile = FrFileINew(fname);
  if(iFile == NULL) 
  {
    printf(" ReadFrFile(): cannot open the input file %s\n", fname);
    return false;
  }
  if(&out == NULL) 
  {
    printf(" ReadFrFile(): no output array specified \n");
    return false;
  }

  bool failure = false;       // true if channel not found
  int n=0, l=0, k=0;
  int nu, nn=0;
  double rate=0., d;

  short ref = 0x1234;         // for byte-swapping check
  char *refC = (char *)&ref;

  int iskip = 0;        // skip in index space
  if (tskip<0) tskip=0.;

  wavearray<float> wd;

  char nname[512];                       // char array for computable file name
  sprintf(nname,"%s",fname);

//  printf("%s  %s\n",nname,fname);

  char gpstime[12];
  char newgpstime[12];
  char *ptime;                   // pointer to GPS time substring in file name

  FrAdcData  *adc   = NULL;
  FrProcData *proc  = NULL;
  FrSerData  *ser   = NULL;
  FrSimData  *sim   = NULL;
  FrVect     *datap = NULL;

// frame length (should be determined from frame file )
  double frlen = 16.;

// this doesn't work
//  frlen = iFile->length;  // frame length
//  cout<<frlen<<endl;

  double gt,gt0,gts,gte;    // GPS time, GPS time of file end
  gts = FrFileITStart(iFile);
  gte = FrFileITEnd(iFile);

// nskip is number of full frames (or multiframe files) in tskip
  int nskip = int( tskip/frlen );

// fskip is a fraction of tskip: 0 <= fskip < frlen
  double fskip = tskip - nskip*frlen;

  gt = gts + nskip*frlen;  // begin GPS time of the first frame to read
  gt0 = gts + tskip;    // GPS time where data begins

//printf(" gts = %16.6f, gte = %16.6f, gt = %16.6f\n", gts, gte, gt);

  iFile->compress = 255;

  do {         // read many files if names are computable

     while(gt<gte) {    // read frames from a file

//printf(" gts = %16.6f, gte = %16.6f, gt = %16.6f\n", gts, gte, gt);

// gt+1.e-7 in function call to prevent uncertainty in frame access

        failure = false;

        if (!strcasecmp(channel_type,"adc"))
        {
     adc = FrAdcDataReadT(iFile,cname,gt+1.e-7);
          if (adc == NULL) { failure = true; }
          else { datap = adc->data; }
        }
        else if (!strcasecmp(channel_type,"proc"))
        {
          proc = FrProcDataReadT(iFile,cname,gt+1.e-7);
          if (proc == NULL) { failure = true; } 
          else { datap = proc->data; }
        }
        else
        {
          printf(" ReadFrFile() error: unknown channel type %s\n",
                   channel_type);
        }

   if (failure) {
      printf(" ReadFrFile() error: channel %s is not found in file %s\n",
        cname, nname);
      return false;
   }

   gt += frlen;

   if(datap == NULL ) continue;
   
//        printf("startx=%f%s\n",datap->startX[0],datap->unitX[0]);

   n = datap->nData;
   nu = n;
   if ((int)wd.size() != n) wd.resize(n);
   
   if (!nn) {
//    rate = adc->sampleRate;    // not available for proc
           if (!datap->dx[0]==0.) rate = 1./datap->dx[0];
      nn = int(tlen * rate);

           if ( nn == 0 )        // 
      {
              printf(" ReadFrFile: time interval too short, return no data.\n");
         return false;
      }

      if(out.size() != size_t(nn)) out.resize(nn);

// k counts aready done data samples
// l counts how much to do in current frame
// set initial values
      k = 0;
      l = nn;
   }
  
   iskip = int(fskip * rate);
   l = l < (n - iskip)? l : n - iskip;

// do we need to swap the bytes in compressed data?
   bool swap = (refC[0] == 0x34 && datap->compress == 255) ||
               (refC[0] == 0x12 && datap->compress == 511);

// Swap bytes assuming the vector is used as an int vector
// Note: this code perform very slowly on Alpha CPU unless
// compiler can take advantage of instruction sets of ev56
// or ev6 architecture (option -mcpu=ev56 or ev6 for gcc/g++)
   if(swap) {
      unsigned char local[2];
      char *buf = datap->data;
      
      for(unsigned int i=0; i<datap->nBytes-3; i=i+4) {
         local[0] = buf[3];
         local[1] = buf[2];
         buf[3]   = buf[0];
         buf[2]   = buf[1];
         buf[1]   = local[1];
         buf[0]   = local[0];
         buf    = buf + 4;
      }
   }
  
   if( (datap->compress & 0xff) == 255 ){
      
      nu = unCompress(datap->dataI, wd);

      if (nu!=n) {
         printf(" ReadFrFile: unCompress returned wrong data length\n");
         break;            // break the frame reading loop
      }
      
// round data for compatibility with uncompressed data stored in frame files
      switch(datap->type) {

         case FR_VECT_2S:
       for(int i=iskip; i<n; i++) {
          d=wd.data[i];
          wd.data[i]=float(short(d>0.? d+0.5 : d-0.5));
       }
       break;

         default:
       break;
      }
      for(int i=iskip; i<l; i++)  
         out.data[k+i]=double(wd.data[i]);
   }
   
   else {

      switch(datap->type) {

         case FR_VECT_2S:
       for(int i=0; i<l; i++) 
          out.data[i+k] = double(datap->dataS[i+iskip]);
       break;

         case FR_VECT_4R:
       for(int i=0; i<l; i++) 
          out.data[i+k] = double(datap->dataF[i+iskip]);
       break;

         default:;
      }
   }
   
   if (adc) FrAdcDataFree(adc);
        if (proc) FrProcDataFree(proc);
        if (sim) FrSimDataFree(sim);
        if (ser) FrSerDataFree(ser);
   
   k += l;
   l = nn - k; // how much to read?
   fskip = 0.; // fskip applyes to first frame only

   if ( l <= 0 ) break;             // break the frame reading loop

     } // end of frames reading loop
     
     FrFileIEnd(iFile);
     
     if (nn && ((nn-k)<=0)) break;  // no more data to read
     
// try to calculate next file name
     sprintf(gpstime, "%9d", int(gts));
     sprintf(newgpstime, "%9d", int(gte));
     ptime=strstr(nname, gpstime);
     
     if ( ptime != NULL && atoi(ptime) == int(gts) &&
     strlen(gpstime) == strlen(newgpstime) ){
   
   strncpy(ptime, newgpstime, strlen( newgpstime ));
//   printf(" guess next file name to be %s\n",nname);

     }
     else  break;       // break file search loop
     
     iFile = FrFileINew(nname);
     
     if(iFile == NULL) {
   printf(" ReadFrFile(): cannot open next input file %s\n", nname);
   break;         // break file search loop
     }
     
     gts = FrFileITStart(iFile);
     iFile->compress = 255;
     
     if (gts != gte) {
   printf(" ReadFrFile(): next input file");
   printf(" %s doesn't provide continuous data\n", nname);
   FrFileIEnd(iFile);
   break;         // break file search loop
     }
     
     gte = FrFileITEnd(iFile);
     
  } while (seek);       // end of file search loop
  
  if (out.size() != size_t(nn)) return false;
  
  if (( nn - k ) > 0)      // fill rest of data by zeroes
  {
     for (int i=k; i<nn; i++) out.data[i]=0.;
  }

//  delete nname;
//  if (out == 0) return NULL;

// normal return
  out.rate(rate);
  out.start(gt0);

  return true;
}


// Function ReadFrFile transparently reads both WAT-compressed
// and standard-compressed ADC data from single frame file.
// tlen - length of data in seconds,
// tskip - skip time from the begining of the file, in seconds
// *cname - ADC channel name
// *fname - frame file name
// seek - if true then it is allowed to seek data continuation
//        in next file which name the function will try to guess
wavearray<float>* ReadFrFile(double tlen, 
              double tskip, 
              char *cname, 
              char *fname, 
              bool seek,
              char *channel_type)
{
  FrFile *iFile = FrFileINew(fname);
  if(iFile == NULL) 
  {
    printf(" ReadFrFile(): cannot open the input file %s\n", fname);
    return NULL;
  }

  bool failure = false;       // true if channel not found
  int n=0, l=0, k=0;
  int nu, nn=0;
  double rate=0., d;

  short ref = 0x1234;         // for byte-swapping check
  char *refC = (char *)&ref;

  int iskip = 0;        // skip in index space
  if (tskip<0) tskip=0.;

  wavearray<float> *out = NULL;
  wavearray<float> wd;

  char* nname = new char[strlen(fname)]; // char array for computable file name
  strcpy(nname,fname);               // copy original file name

  char gpstime[12];
  char newgpstime[12];
  char *ptime;                   // pointer to GPS time substring in file name

  FrAdcData *adc = NULL;
  FrProcData *proc = NULL;
  FrSerData *ser = NULL;
  FrSimData *sim = NULL;
  FrVect *datap = NULL;

// frame length (should be determined from frame file )
  double frlen = 16.;

// this doesn't work
//  frlen = iFile->length;  // frame length
//  cout<<frlen<<endl;

  double gt,gt0,gts,gte;    // GPS time, GPS time of file end
  gts = FrFileITStart(iFile);
  gte = FrFileITEnd(iFile);

// nskip is number of full frames (or multiframe files) in tskip
  int nskip = int( tskip/frlen );

// fskip is a fraction of tskip: 0 <= fskip < frlen
  double fskip = tskip - nskip*frlen;

  gt = gts + nskip*frlen;  // begin GPS time of the first frame to read
  gt0 = gts + tskip;    // GPS time of data begin

//printf(" gts = %16.6f, gte = %16.6f, gt = %16.6f\n", gts, gte, gt);

  iFile->compress = 255;

  do {         // read many files if names are computable

     while(gt<gte) {    // read frames from file

//printf(" gts = %16.6f, gte = %16.6f, gt = %16.6f\n", gts, gte, gt);

// gt+1.e-7 in function call to prevent uncertainty in frame access

        failure = false;

        if (!strcasecmp(channel_type,"adc"))
        {
     adc = FrAdcDataReadT(iFile,cname,gt+1.e-7);
          if (adc == NULL) { failure = true; }
          else { datap = adc->data; }
        }
        else if (!strcasecmp(channel_type,"proc"))
        {
          proc = FrProcDataReadT(iFile,cname,gt+1.e-7);
          if (proc == NULL) { failure = true; } 
          else { datap = proc->data; }
        }
        else
        {
          printf(" ReadFrFile() error: unknown channel type %s\n",
                   channel_type);
        }

   if (failure) {
      printf(" ReadFrFile() error: channel %s is not found in file %s\n",
        cname, nname);
      if (out) delete out;
      return NULL;
   }

   gt += frlen;

   if(datap == NULL ) continue;
   
//        printf("startx=%f%s\n",datap->startX[0],datap->unitX[0]);
   n = datap->nData;
   nu = n;
   if ((int)wd.size() != n) wd.resize(n);
   
   if (!out) {
//    rate = adc->sampleRate;    // not available for proc
           if (!datap->dx[0]==0.) rate = 1./datap->dx[0];
      nn = int(tlen * rate);

           if ( nn == 0 )        // 
      {
              printf(" ReadFrFile: time interval too short, return no data.\n");
         return NULL;
      }

      out = new wavearray<float>(nn);

// k counts aready done data samples
// l counts how much to do in current frame
// set initial values
      k = 0;
      l = nn;
   }
  
   iskip = int(fskip * rate);
   l = l < (n - iskip)? l : n - iskip;

// do we need to swap the bytes in compressed data?
   bool swap = (refC[0] == 0x34 && datap->compress == 255) ||
               (refC[0] == 0x12 && datap->compress == 511);

// Swap bytes assuming the vector is used as an int vector
// Note: this code perform very slowly on Alpha CPU unless
// compiler can take advantage of instruction sets of ev56
// or ev6 architecture (option -mcpu=ev56 or ev6 for gcc/g++)
   if(swap) {
      unsigned char local[2];
      char *buf = datap->data;
      
      for(unsigned int i=0; i<datap->nBytes-3; i=i+4) {
         local[0] = buf[3];
         local[1] = buf[2];
         buf[3]   = buf[0];
         buf[2]   = buf[1];
         buf[1]   = local[1];
         buf[0]   = local[0];
         buf    = buf + 4;
      }
   }
  
   if( (datap->compress & 0xff) == 255 ){
      
      nu = unCompress(datap->dataI, wd);

      if (nu!=n) {
         printf(" ReadFrFile: unCompress returned wrong data length\n");
         break;            // break the frame reading loop
      }
      
// round data for compatibility with uncompressed data stored in frame files
      switch(datap->type) {

         case FR_VECT_2S:
       for(int i=iskip; i<n; i++) {
          d=wd.data[i];
          wd.data[i]=float(short(d>0.? d+0.5 : d-0.5));
       }
       break;

         default:
       break;
      }
      out->cpf(wd,l,iskip,k);
   }
   
   else {

      switch(datap->type) {

         case FR_VECT_2S:
       for(int i=0; i<l; i++) 
          out->data[i+k] = datap->dataS[i+iskip];
       break;

         case FR_VECT_4R:
       for(int i=0; i<l; i++) 
          out->data[i+k] = datap->dataF[i+iskip];
       break;

         default:;
      }
   }
   
   if (adc) FrAdcDataFree(adc);
        if (proc) FrProcDataFree(proc);
        if (sim) FrSimDataFree(sim);
        if (ser) FrSerDataFree(ser);
   
   k += l;
   l = nn - k; // how much to read?
   fskip = 0.; // fskip applyes to first frame only

   if ( l <= 0 ) break;             // break the frame reading loop
     } // end of frames reading loop
     
     FrFileIEnd(iFile);
     
     if (out && ((nn-k)<=0)) break;    // no more data to read
     
// try to calculate next file name
     sprintf(gpstime, "%9d", int(gts));
     sprintf(newgpstime, "%9d", int(gte));
     ptime=strstr(nname, gpstime);
     
     if ( ptime != NULL && atoi(ptime) == int(gts) &&
     strlen(gpstime) == strlen(newgpstime) ){
   
   strncpy(ptime, newgpstime, strlen( newgpstime ));
//   printf(" guess next file name to be %s\n",nname);

     }
     else  break;       // break file search loop
     
     iFile = FrFileINew(nname);
     
     if(iFile == NULL) {
   printf(" ReadFrFile(): cannot open next input file %s\n", nname);
   break;         // break file search loop
     }
     
     gts = FrFileITStart(iFile);
     iFile->compress = 255;
     
     if (gts != gte) {
   printf(" ReadFrFile(): next input file");
   printf(" %s doesn't provide continuous data\n", nname);
   FrFileIEnd(iFile);
   break;         // break file search loop
     }
     
     gte = FrFileITEnd(iFile);
     
  } while (seek);       // end of file search loop
  
  if (out==NULL) return NULL;
  
  if (( nn - k ) > 0)      // fill rest of data by zeroes
  {
     for (int i=k; i<nn; i++) out->data[i]=0.;
  }

//  delete nname;
  
  if (out == 0) return NULL;

// normal return
  out->rate(rate);
  out->start(gt0);

  return out;
}