void CLASS parse_foveon()
{
  int entries, img = 0, off, len, tag, save, i, wide, high, pent, poff[256][2];
  char name[64], value[64];
  order = 0x4949; /* Little-endian */
  fseek(ifp, 36, SEEK_SET);
  flip = get4();
  fseek(ifp, -4, SEEK_END);
  fseek(ifp, get4(), SEEK_SET);
  if (get4() != 0x64434553)
    return; /* SECd */
  entries = (get4(), get4());
  while (entries--)
  {
    off = get4();
    len = get4();
    tag = get4();
    save = ftell(ifp);
    fseek(ifp, off, SEEK_SET);
    if (get4() != (0x20434553 | (tag << 24)))
      return;
    switch (tag)
    {
    case 0x47414d49: /* IMAG */
    case 0x32414d49: /* IMA2 */
      fseek(ifp, 8, SEEK_CUR);
      pent = get4();
      wide = get4();
      high = get4();
      if (wide > raw_width && high > raw_height)
      {
        switch (pent)
        {
        case 5:
          load_flags = 1;
        case 6:
          load_raw = &CLASS foveon_sd_load_raw;
          break;
        case 30:
          load_raw = &CLASS foveon_dp_load_raw;
          break;
        default:
          load_raw = 0;
        }
        raw_width = wide;
        raw_height = high;
        data_offset = off + 28;
        is_foveon = 1;
      }
      fseek(ifp, off + 28, SEEK_SET);
      if (fgetc(ifp) == 0xff && fgetc(ifp) == 0xd8 && thumb_length < len - 28)
      {
        thumb_offset = off + 28;
        thumb_length = len - 28;
        write_thumb = &CLASS jpeg_thumb;
      }
      if (++img == 2 && !thumb_length)
      {
        thumb_offset = off + 24;
        thumb_width = wide;
        thumb_height = high;
        write_thumb = &CLASS foveon_thumb;
      }
      break;
    case 0x464d4143: /* CAMF */
      meta_offset = off + 8;
      meta_length = len - 28;
      break;
    case 0x504f5250: /* PROP */
      pent = (get4(), get4());
      fseek(ifp, 12, SEEK_CUR);
      off += pent * 8 + 24;
      if ((unsigned)pent > 256)
        pent = 256;
      for (i = 0; i < pent * 2; i++)
        ((int *)poff)[i] = off + get4() * 2;
      for (i = 0; i < pent; i++)
      {
        foveon_gets(poff[i][0], name, 64);
        foveon_gets(poff[i][1], value, 64);
        if (!strcmp(name, "ISO"))
          iso_speed = atoi(value);
        if (!strcmp(name, "CAMMANUF"))
          strcpy(make, value);
        if (!strcmp(name, "CAMMODEL"))
          strcpy(model, value);
        if (!strcmp(name, "WB_DESC"))
          strcpy(model2, value);
        if (!strcmp(name, "TIME"))
          timestamp = atoi(value);
        if (!strcmp(name, "EXPTIME"))
          shutter = atoi(value) / 1000000.0;
        if (!strcmp(name, "APERTURE"))
          aperture = atof(value);
        if (!strcmp(name, "FLENGTH"))
          focal_len = atof(value);
#ifdef LIBRAW_LIBRARY_BUILD
        if (!strcmp(name, "CAMSERIAL"))
          strcpy(imgdata.shootinginfo.BodySerial, value);
        if (!strcmp(name, "FLEQ35MM"))
          imgdata.lens.makernotes.FocalLengthIn35mmFormat = atof(value);
        if (!strcmp(name, "LENSARANGE"))
        {
          char *sp;
          imgdata.lens.makernotes.MaxAp4CurFocal = imgdata.lens.makernotes.MinAp4CurFocal = atof(value);
          sp = strrchr(value, ' ');
          if (sp)
          {
            imgdata.lens.makernotes.MinAp4CurFocal = atof(sp);
            if (imgdata.lens.makernotes.MaxAp4CurFocal > imgdata.lens.makernotes.MinAp4CurFocal)
              my_swap(float, imgdata.lens.makernotes.MaxAp4CurFocal, imgdata.lens.makernotes.MinAp4CurFocal);
          }
        }
        if (!strcmp(name, "LENSFRANGE"))
        {
          char *sp;
          imgdata.lens.makernotes.MinFocal = imgdata.lens.makernotes.MaxFocal = atof(value);
          sp = strrchr(value, ' ');
          if (sp)
          {
            imgdata.lens.makernotes.MaxFocal = atof(sp);
            if ((imgdata.lens.makernotes.MaxFocal + 0.17f) < imgdata.lens.makernotes.MinFocal)
              my_swap(float, imgdata.lens.makernotes.MaxFocal, imgdata.lens.makernotes.MinFocal);
          }
        }
        if (!strcmp(name, "LENSMODEL"))
        {
          char *sp;
          imgdata.lens.makernotes.LensID = strtol(value, &sp, 16); // atoi(value);
          if (imgdata.lens.makernotes.LensID)
            imgdata.lens.makernotes.LensMount = Sigma_X3F;
        }
      }
#endif
    }
#ifdef LOCALTIME
    timestamp = mktime(gmtime(&timestamp));
#endif
  }
  fseek(ifp, save, SEEK_SET);
}
Unknown