def current_metadata(items):
"""Returns the most likely artist and album for a set of Items.
Each is determined by tag reflected by the plurality of the Items.
"""
keys = 'artist', 'album'
likelies = {}
consensus = {}
for key in keys:
values = [getattr(item, key) for item in items if item]
likelies[key], freq = plurality(values)
consensus[key] = (freq == len(values))
return likelies['artist'], likelies['album'], consensus['artist']
def current_metadata(items):
"""Returns the most likely artist and album for a set of Items.
Each is determined by tag reflected by the plurality of the Items.
"""
keys = 'artist', 'album'
likelies = {}
consensus = {}
for key in keys:
values = [getattr(item, key) for item in items]
likelies[key], freq = plurality(values)
consensus[key] = (freq == len(values))
return likelies['artist'], likelies['album'], consensus['artist']
def _infer_album_fields(task):
"""Given an album and an associated import task, massage the
album-level metadata. This ensures that the album artist is set
and that the "compilation" flag is set automatically.
"""
assert task.is_album
assert task.items
changes = {}
if task.choice_flag == action.ASIS:
# Taking metadata "as-is". Guess whether this album is VA.
plur_artist, freq = util.plurality([i.artist for i in task.items])
if freq == len(task.items) or (
freq > 1
and float(freq) / len(task.items) >= SINGLE_ARTIST_THRESH):
# Single-artist album.
changes['albumartist'] = plur_artist
changes['comp'] = False
else:
# VA.
changes['albumartist'] = VARIOUS_ARTISTS
changes['comp'] = True
elif task.choice_flag == action.APPLY:
# Applying autotagged metadata. Just get AA from the first
# item.
for item in task.items:
if item is not None:
first_item = item
break
else:
assert False, "all items are None"
if not first_item.albumartist:
changes['albumartist'] = first_item.artist
if not first_item.mb_albumartistid:
changes['mb_albumartistid'] = first_item.mb_artistid
else:
assert False
# Apply new metadata.
for item in task.items:
if item is not None:
for k, v in changes.iteritems():
setattr(item, k, v)
def _infer_album_fields(task):
"""Given an album and an associated import task, massage the
album-level metadata. This ensures that the album artist is set
and that the "compilation" flag is set automatically.
"""
assert task.is_album
assert task.items
changes = {}
if task.choice_flag == action.ASIS:
# Taking metadata "as-is". Guess whether this album is VA.
plur_artist, freq = util.plurality([i.artist for i in task.items])
if freq == len(task.items) or (freq > 1 and
float(freq) / len(task.items) >= SINGLE_ARTIST_THRESH):
# Single-artist album.
changes['albumartist'] = plur_artist
changes['comp'] = False
else:
# VA.
changes['albumartist'] = VARIOUS_ARTISTS
changes['comp'] = True
elif task.choice_flag == action.APPLY:
# Applying autotagged metadata. Just get AA from the first
# item.
for item in task.items:
if item is not None:
first_item = item
break
else:
assert False, "all items are None"
if not first_item.albumartist:
changes['albumartist'] = first_item.artist
if not first_item.mb_albumartistid:
changes['mb_albumartistid'] = first_item.mb_artistid
else:
assert False
# Apply new metadata.
for item in task.items:
if item is not None:
for k, v in changes.iteritems():
setattr(item, k, v)