def __init__(self, path):
"""Constructs a new MediaFile reflecting the file at path. May
throw UnreadableFileError.
"""
self.path = path
unreadable_exc = (
mutagen.mp3.HeaderNotFoundError,
mutagen.flac.FLACNoHeaderError,
mutagen.monkeysaudio.MonkeysAudioHeaderError,
mutagen.mp4.MP4StreamInfoError,
mutagen.oggvorbis.OggVorbisHeaderError,
)
try:
self.mgfile = mutagen.File(path)
except unreadable_exc as exc:
log.debug(u'header parsing failed: {0}'.format(unicode(exc)))
raise UnreadableFileError('Mutagen could not read file')
except IOError:
raise UnreadableFileError('could not read file')
except Exception as exc:
# Hide bugs in Mutagen.
log.debug(traceback.format_exc())
log.error('uncaught Mutagen exception: {0}'.format(exc))
raise UnreadableFileError('Mutagen raised an exception')
if self.mgfile is None: # Mutagen couldn't guess the type
raise FileTypeError('file type unsupported by Mutagen')
elif type(self.mgfile).__name__ == 'M4A' or \
type(self.mgfile).__name__ == 'MP4':
self.type = 'mp4'
elif type(self.mgfile).__name__ == 'ID3' or \
type(self.mgfile).__name__ == 'MP3':
self.type = 'mp3'
elif type(self.mgfile).__name__ == 'FLAC':
self.type = 'flac'
elif type(self.mgfile).__name__ == 'OggVorbis':
self.type = 'ogg'
elif type(self.mgfile).__name__ == 'MonkeysAudio':
self.type = 'ape'
elif type(self.mgfile).__name__ == 'WavPack':
self.type = 'wv'
elif type(self.mgfile).__name__ == 'Musepack':
self.type = 'mpc'
else:
raise FileTypeError('file type %s unsupported by MediaFile' %
type(self.mgfile).__name__)
# add a set of tags if it's missing
if self.mgfile.tags is None:
self.mgfile.add_tags()
def _fetchdata(self, obj, style):
"""Get the value associated with this descriptor's field stored
with the given StorageStyle. Unwraps from a list if necessary.
"""
# fetch the value, which may be a scalar or a list
if obj.type == 'mp3':
if style.id3_desc is not None: # also match on 'desc' field
frames = obj.mgfile.tags.getall(style.key)
entry = None
for frame in frames:
if frame.desc.lower() == style.id3_desc.lower():
entry = getattr(frame, style.id3_frame_field)
break
if entry is None: # no desc match
return None
else:
# Get the metadata frame object.
try:
frame = obj.mgfile[style.key]
except KeyError:
return None
entry = getattr(frame, style.id3_frame_field)
else: # Not MP3.
try:
entry = obj.mgfile[style.key]
except KeyError:
return None
# Possibly index the list.
if style.list_elem:
if entry: # List must have at least one value.
# Handle Mutagen bugs when reading values (#356).
try:
return entry[0]
except:
log.error('Mutagen exception when reading field: %s' %
traceback.format_exc)
return None
else:
return None
else:
return entry
def cleanup(signum=None, frame=None):
global log, importThread, app
if type(signum) == type(None):
pass
else:
log.info(u'Signal %i caught, saving and exiting...' % int(signum))
log.info(u'Stopping worker threads')
if importThread != None:
importThread.stop()
importThread.join(5)
if importThread.isAlive():
log.error(u'Failed to clean up importThread')
log.info(u'Stopping CherryPy Engine')
app.stop()
log.info(u'Clean up complete')
sys.exit(0)
