standards/exif/_exif_tags.py

   1 """ Exif tags based on JEITA CP-3451 Exif Version 2.2 specification tables.
   2
   3
   4
   5 """
   6 from os.path import join
   7 from Globals import package_home
   8 home = package_home(globals())
   9
  10 files = [
  11 #         'gpsA.csv'
  12           'ifdA.csv'
  13         , 'ifdB.csv'
  14         , 'ifdC.csv'
  15         , 'ifdD.csv'
  16         , 'ifdE.csv'
  17         , 'ifdF.csv'
  18         , 'ifdG.csv'
  19         , 'ifdH.csv'
  20         , 'tiffA.csv'
  21         , 'tiffB.csv'
  22         , 'tiffC.csv'
  23         , 'tiffD.csv'
  24         , 'hand_added.csv'
  25 ]
  26
  27
  28 TAGS = {}
  29 TAG_TYPES = {}
  30
  31 for name in files :
  32         f = file(join(home, name))
  33         lines = f.readlines()
  34         f.close()
  35         for l in [l for l in lines if not l.startswith('#')] :
  36                 fields = [f.strip() for f in l.split(';')]
  37                 assert len(fields) == 7, "%s malformed at line: '%s')" % (path, l)
  38                 tagName, fieldName, tagIdDec, noise, typ, count, noise = fields
  39                 tagId = int(tagIdDec)
  40                 if TAGS.has_key(tagId) :
  41                         raise ValueError, "%x tag is already defined" % tagId
  42                 TAGS[tagId] = (fieldName, tagName)
  43                 TAG_TYPES[tagId] = (typ, count)