#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
-# Library to extract EXIF information from digital camera image files
-# http://sourceforge.net/projects/exif-py/
#
-# VERSION 1.0.10
+# Library to extract EXIF information from digital camera image files.
+# https://github.com/ianare/exif-py
+#
+#
+# VERSION 1.1.0
#
# To use this library call with:
# f = open(path_name, 'rb')
#
# These 2 are useful when you are retrieving a large list of images
#
-#
# To return an error on invalid tags,
# pass the -s or --strict argument, or as
# tags = EXIF.process_file(f, strict=True)
# 'EXIF DateTimeOriginal', 'Image Orientation', 'MakerNote FocusMode'
#
# Copyright (c) 2002-2007 Gene Cash All rights reserved
-# Copyright (c) 2007-2008 Ianaré Sévi All rights reserved
+# Copyright (c) 2007-2012 Ianaré Sévi All rights reserved
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
seq = seq[8:]
# Of course, this is only correct if ASCII, and the standard explicitly
# allows JIS and Unicode.
- return make_string(seq)
+ return make_string( make_string(seq) )
# field type descriptions as (length, abbreviation, full name) tuples
FIELD_TYPES = (
return self.printable
def __repr__(self):
- return '(0x%04X) %s=%s @ %d' % (self.tag,
+ try:
+ s= '(0x%04X) %s=%s @ %d' % (self.tag,
FIELD_TYPES[self.field_type][2],
self.printable,
self.field_offset)
+ except:
+ s= '(%s) %s=%s @ %s' % (str(self.tag),
+ FIELD_TYPES[self.field_type][2],
+ self.printable,
+ str(self.field_offset))
+ return s
# class that handles an EXIF header
class EXIF_header:
# special case: null-terminated ASCII string
# XXX investigate
# sometimes gets too big to fit in int value
- if count != 0 and count < (2**31):
- self.file.seek(self.offset + offset)
- values = self.file.read(count)
- #print values
- # Drop any garbage after a null.
- values = values.split('\x00', 1)[0]
- else:
- values = ''
+ if count != 0: # and count < (2**31): # 2E31 is hardware dependant. --gd
+ try:
+ self.file.seek(self.offset + offset)
+ values = self.file.read(count)
+ #print values
+ # Drop any garbage after a null.
+ values = values.split('\x00', 1)[0]
+ except OverflowError:
+ values = ''
else:
values = []
signed = (field_type in [6, 8, 9, 10])
offset = 0
elif data[0:2] == '\xFF\xD8':
# it's a JPEG file
+ if debug: print "JPEG format recognized data[0:2] == '0xFFD8'."
+ base = 2
while data[2] == '\xFF' and data[6:10] in ('JFIF', 'JFXX', 'OLYM', 'Phot'):
+ if debug: print "data[2] == 0xxFF data[3]==%x and data[6:10] = %s"%(ord(data[3]),data[6:10])
length = ord(data[4])*256+ord(data[5])
+ if debug: print "Length offset is",length
f.read(length-8)
# fake an EXIF beginning of file
+ # I don't think this is used. --gd
data = '\xFF\x00'+f.read(10)
fake_exif = 1
- if data[2] == '\xFF' and data[6:10] == 'Exif':
+ if base>2:
+ if debug: print "added to base "
+ base = base + length + 4 -2
+ else:
+ if debug: print "added to zero "
+ base = length + 4
+ if debug: print "Set segment base to",base
+
+ # Big ugly patch to deal with APP2 (or other) data coming before APP1
+ f.seek(0)
+ data = f.read(base+4000) # in theory, this could be insufficient since 64K is the maximum size--gd
+ # base = 2
+ while 1:
+ if debug: print "Segment base 0x%X" % base
+ if data[base:base+2]=='\xFF\xE1':
+ # APP1
+ if debug: print "APP1 at base",hex(base)
+ if debug: print "Length",hex(ord(data[base+2])), hex(ord(data[base+3]))
+ if debug: print "Code",data[base+4:base+8]
+ if data[base+4:base+8] == "Exif":
+ if debug: print "Decrement base by",2,"to get to pre-segment header (for compatibility with later code)"
+ base = base-2
+ break
+ if debug: print "Increment base by",ord(data[base+2])*256+ord(data[base+3])+2
+ base=base+ord(data[base+2])*256+ord(data[base+3])+2
+ elif data[base:base+2]=='\xFF\xE0':
+ # APP0
+ if debug: print "APP0 at base",hex(base)
+ if debug: print "Length",hex(ord(data[base+2])), hex(ord(data[base+3]))
+ if debug: print "Code",data[base+4:base+8]
+ if debug: print "Increment base by",ord(data[base+2])*256+ord(data[base+3])+2
+ base=base+ord(data[base+2])*256+ord(data[base+3])+2
+ elif data[base:base+2]=='\xFF\xE2':
+ # APP2
+ if debug: print "APP2 at base",hex(base)
+ if debug: print "Length",hex(ord(data[base+2])), hex(ord(data[base+3]))
+ if debug: print "Code",data[base+4:base+8]
+ if debug: print "Increment base by",ord(data[base+2])*256+ord(data[base+3])+2
+ base=base+ord(data[base+2])*256+ord(data[base+3])+2
+ elif data[base:base+2]=='\xFF\xEE':
+ # APP14
+ if debug: print "APP14 Adobe segment at base",hex(base)
+ if debug: print "Length",hex(ord(data[base+2])), hex(ord(data[base+3]))
+ if debug: print "Code",data[base+4:base+8]
+ if debug: print "Increment base by",ord(data[base+2])*256+ord(data[base+3])+2
+ print "There is useful EXIF-like data here, but we have no parser for it."
+ base=base+ord(data[base+2])*256+ord(data[base+3])+2
+ elif data[base:base+2]=='\xFF\xDB':
+ if debug: print "JPEG image data at base",hex(base),"No more segments are expected."
+ # sys.exit(0)
+ break
+ elif data[base:base+2]=='\xFF\xD8':
+ # APP12
+ if debug: print "FFD8 segment at base",hex(base)
+ if debug: print "Got",hex(ord(data[base])), hex(ord(data[base+1])),"and", data[4+base:10+base], "instead."
+ if debug: print "Length",hex(ord(data[base+2])), hex(ord(data[base+3]))
+ if debug: print "Code",data[base+4:base+8]
+ if debug: print "Increment base by",ord(data[base+2])*256+ord(data[base+3])+2
+ base=base+ord(data[base+2])*256+ord(data[base+3])+2
+ elif data[base:base+2]=='\xFF\xEC':
+ # APP12
+ if debug: print "APP12 XMP (Ducky) or Pictureinfo segment at base",hex(base)
+ if debug: print "Got",hex(ord(data[base])), hex(ord(data[base+1])),"and", data[4+base:10+base], "instead."
+ if debug: print "Length",hex(ord(data[base+2])), hex(ord(data[base+3]))
+ if debug: print "Code",data[base+4:base+8]
+ if debug: print "Increment base by",ord(data[base+2])*256+ord(data[base+3])+2
+ print "There is useful EXIF-like data here (quality, comment, copyright), but we have no parser for it."
+ base=base+ord(data[base+2])*256+ord(data[base+3])+2
+ else:
+ try:
+ if debug: print "Unexpected/unhandled segment type or file content."
+ if debug: print "Got",hex(ord(data[base])), hex(ord(data[base+1])),"and", data[4+base:10+base], "instead."
+ if debug: print "Increment base by",ord(data[base+2])*256+ord(data[base+3])+2
+ except: pass
+ try: base=base+ord(data[base+2])*256+ord(data[base+3])+2
+ except: pass
+
+ f.seek(base+12)
+ if data[2+base] == '\xFF' and data[6+base:10+base] == 'Exif':
# detected EXIF header
offset = f.tell()
endian = f.read(1)
+ #HACK TEST: endian = 'M'
+ elif data[2+base] == '\xFF' and data[6+base:10+base+1] == 'Ducky':
+ # detected Ducky header.
+ if debug: print "EXIF-like header (normally 0xFF and code):",hex(ord(data[2+base])) , "and", data[6+base:10+base+1]
+ offset = f.tell()
+ endian = f.read(1)
+ elif data[2+base] == '\xFF' and data[6+base:10+base+1] == 'Adobe':
+ # detected APP14 (Adobe)
+ if debug: print "EXIF-like header (normally 0xFF and code):",hex(ord(data[2+base])) , "and", data[6+base:10+base+1]
+ offset = f.tell()
+ endian = f.read(1)
else:
# no EXIF information
+ if debug: print "No EXIF header expected data[2+base]==0xFF and data[6+base:10+base]===Exif (or Duck)"
+ if debug: print " but got",hex(ord(data[2+base])) , "and", data[6+base:10+base+1]
return {}
else:
# file format not recognized
+ if debug: print "file format not recognized"
return {}
# deal with the EXIF info we found
projects / mediagoblin.git / commitdiff