def parse(self, jpeg):
self.__offset = 2
result = {}
while True:
segment_marker = struct.unpack_from("2c", jpeg, self.__offset)
self.__offset += 2
if segment_marker == self.__SOS:
break
if segment_marker == self.__EOI:
break
segment_length = struct.unpack_from(">H", jpeg, self.__offset)[0]
for frame_header_marker in self.__SOFs:
if segment_marker == frame_header_marker:
(height, width, channels) = struct.unpack_from(">HHB", jpeg, self.__offset + 3)
result["width"] = width
result["height"] = height
result["mode"] = self.__get_color_mode(channels)
break
if segment_marker == self.__APP1:
app1_magic = struct.unpack_from("6c", jpeg, self.__offset + 2)
if app1_magic == (b'\x45', b'\x78', b'\x69', b'\x66', b'\x00', b'\x00'):
exif_parser = Exif(jpeg, self.__offset + 8, segment_length)
tags = [
(271, "maker"),
(272, "model"),
(2, "latitude"),
(4, "longitude"),
(36867, "DateTimeOriginal")
]
for tag in tags:
try:
value = exif_parser.search_tag(jpeg, target_tag=tag[0], clear_offset=True)
result[tag[1]] = value
except ValueError:
pass
self.__offset += segment_length
return result
