def initialise(cls, config_store, verbosity):
if not GExiv2.initialize():
raise RuntimeError('Failed to initialise GExiv2')
GExiv2.log_set_level(
max(GExiv2.LogLevel.DEBUG, min(GExiv2.LogLevel.ERROR,
4 - verbosity)))
GExiv2.log_use_glib_logging()
# Recent versions of Exiv2 have these namespaces defined, but
# older versions may not recognise them. The xapGImg URL is
# invalid, but Photini doesn't write xapGImg so it doesn't
# matter.
for prefix, name in (('exifEX', 'http://cipa.jp/exif/1.0/'),
('xapGImg', 'http://ns.adobe.com/xxx/'),
('xmpGImg', 'http://ns.adobe.com/xap/1.0/g/img/'),
('xmpRights',
'http://ns.adobe.com/xap/1.0/rights/')):
GExiv2.Metadata.register_xmp_namespace(name, prefix)
# Gexiv2 won't register the 'Iptc4xmpExt' namespace as its
# abbreviated version 'iptcExt' is already defined. This kludge
# registers it by reading some data with the full namespace
data = XMP_WRAPPER.format(
'xmlns:Iptc4xmpExt="http://iptc.org/std/Iptc4xmpExt/2008-02-29/"')
# open the data to register the namespace
GExiv2.Metadata().open_buf(data.encode('utf-8'))
# make list of possible character encodings
cls.encodings = ['utf-8', 'iso8859-1', 'ascii']
char_set = locale.getdefaultlocale()[1]
if char_set:
try:
name = codecs.lookup(char_set).name
if name not in cls.encodings:
cls.encodings.append(name)
except LookupError:
pass
from datetime import datetime
from fractions import Fraction
import locale
import logging
import math
import os
from gi.repository import GObject, GExiv2
import six
from .pyqt import QtCore
from . import __version__
# pydoc gi.repository.GExiv2.Metadata is useful to see methods available
GExiv2.log_set_level(GExiv2.LogLevel.MUTE)
class MetadataValue(object):
# base for classes that store a metadata value, e.g. a string, int
# or latitude & longitude pair
def __init__(self, value):
assert (value is not None)
self.value = value
@classmethod
def from_exif(cls, value):
return cls(value)
@classmethod
def from_iptc(cls, value):
VENDOR_EXIF_CODES = (
'Exif.Canon.LensModel',
'Exif.Minolta.LensID',
'Exif.Nikon3.Lens',
'Exif.Nikon3.LensType',
'Exif.OlympusEq.LensModel',
'Exif.OlympusEq.LensType',
'Exif.Panasonic.LensType',
'Exif.Pentax.LensType',
'Exif.Samsung2.LensType',
'Exif.Sigma.LensRange',
'Exif.Sony1.LensID',
)
GEXIV2_DATE_FORMAT = '%Y:%m:%d %H:%M:%S'
GExiv2.log_set_level(GExiv2.LogLevel.MUTE) # hide exiv2 errors
TAGS_OF_INTEREST = (
'Exif.Photo.DateTimeOriginal',
'Exif.Photo.DateTimeDigitized',
'Exif.Image.DateTime',
)
def decode_exif_user_comment(raw, imgpath):
"""
GExiv2 does not decode EXIF user comment.
"""
# This field can contain charset information
if raw.startswith('charset='):
tokens = raw.split(' ')
except ValueError:
pass
from gi.repository import GObject, GExiv2
import six
from photini import __version__
logger = logging.getLogger(__name__)
gexiv2_version = '{} {}, GExiv2 {}, GObject {}'.format(
('PyGI', 'pgi')[using_pgi], gi.__version__,
GExiv2._version, GObject._version)
# pydoc gi.repository.GExiv2.Metadata is useful to see methods available
GExiv2.log_set_level(GExiv2.LogLevel.MUTE)
def safe_fraction(value):
# Avoid ZeroDivisionError when '0/0' used for zero values in Exif
if isinstance(value, six.string_types):
numerator, sep, denominator = value.partition('/')
if denominator and int(denominator) == 0:
return Fraction(0.0)
return Fraction(value).limit_denominator(1000000)
class MetadataValue(object):
# base for classes that store a metadata value, e.g. a string, int
# or float
def __init__(self, value):
assert(value is not None)
def debug_metadata():
GExiv2.log_set_level(GExiv2.LogLevel.INFO)
