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Simplify MediaField descriptor

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Thomas Scholtes 2014-01-30 19:06:11 +01:00
parent a9ccf84b72
commit 861b50d556
1 changed files with 19 additions and 28 deletions
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47
beets/mediafile.py
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@ -544,48 +544,39 @@ class MediaField(object):
# a single style for convenience.
if isinstance(styles, StorageStyle):
return [styles]
else:
if hasattr(styles, '__iter__'):
return styles
return []
def __get__(self, obj, owner):
"""Retrieve the value of this metadata field.
"""
# Fetch the data using the various StorageStyles.
styles = self._styles(obj)
if styles is None:
out = None
else:
for style in styles:
# Use the first style that returns a reasonable value.
out = self._fetchdata(obj, style)
if out:
break
for style in self._styles(obj):
# Use the first style that returns a reasonable value.
out = self._fetchdata(obj, style)
if out:
break
if style.packing:
p = Packed(out, style.packing, out_type=style.pack_type)
out = p[style.pack_pos]
if style.packing:
p = Packed(out, style.packing, out_type=style.pack_type)
out = p[style.pack_pos]
# Remove suffix.
if style.suffix and isinstance(out, (str, unicode)):
if out.endswith(style.suffix):
out = out[:-len(style.suffix)]
# Remove suffix.
if style.suffix and isinstance(out, (str, unicode)):
if out.endswith(style.suffix):
out = out[:-len(style.suffix)]
# MPEG-4 freeform frames are (should be?) encoded as UTF-8.
if obj.type in MP4_TYPES and style.key.startswith('----:') and \
isinstance(out, str):
out = out.decode('utf8')
# MPEG-4 freeform frames are (should be?) encoded as UTF-8.
if obj.type in MP4_TYPES and style.key.startswith('----:') and \
isinstance(out, str):
out = out.decode('utf8')
return _safe_cast(self.out_type, out)
def __set__(self, obj, val):
"""Set the value of this metadata field.
"""
# Store using every StorageStyle available.
styles = self._styles(obj)
if styles is None:
return
for style in styles:
for style in self._styles(obj):
if style.packing:
p = Packed(self._fetchdata(obj, style), style.packing,