Congegni
/
sintonia
7
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

MM2: refactoring of metadata handling

This commit is contained in:
Rudi Grinberg 2012-08-21 12:34:29 -04:00
parent 142eb6b66e
commit bbf5a86415
1 changed files with 31 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
python_apps/media-monitor2/media/monitor/metadata.py
View File

@ -105,10 +105,38 @@ class Metadata(Loggable):
# little bit messy. Some of the handling is in m.m.pure while the rest is
# here. Also interface is not very consistent
@staticmethod
def airtime_dict(d):
"""
Converts mutagen dictionary 'd' into airtime dictionary
"""
temp_dict = {}
for m_key, m_val in d.iteritems():
# TODO : some files have multiple fields for the same metadata.
# genre is one example. In that case mutagen will return a list
# of values
assign_val = m_val[0] if isinstance(m_val, list) else m_val
temp_dict[ m_key ] = assign_val
airtime_dictionary = {}
for muta_k, muta_v in temp_dict.iteritems():
# We must check if we can actually translate the mutagen key into
# an airtime key before doing the conversion
if muta_k in mutagen2airtime:
airtime_key = mutagen2airtime[muta_k]
# Apply truncation in the case where airtime_key is in our
# truncation table
muta_v = \
truncate_to_length(muta_v, truncate_table[airtime_key])\
if airtime_key in truncate_table else muta_v
airtime_dictionary[ airtime_key ] = muta_v
return airtime_dictionary
@staticmethod
def write_unsafe(path,md):
"""
Writes 'md' metadata into 'path' through mutagen
Writes 'md' metadata into 'path' through mutagen. Converts all
dictionary values to strings because mutagen will not write anything
else
"""
if not os.path.exists(path): raise BadSongFile(path)
song_file = mutagen.File(path, easy=True)
@ -128,37 +156,13 @@ class Metadata(Loggable):
self.path = fpath
# TODO : Simplify the way all of these rules are handled right not it's
# extremely unclear and needs to be refactored.
metadata = {}
# Load only the metadata avilable in mutagen into metdata
for k,v in full_mutagen.iteritems():
# Special handling of attributes here
if isinstance(v, list):
# TODO : some files have multiple fields for the same metadata.
# genre is one example. In that case mutagen will return a list
# of values
metadata[k] = v[0]
#if len(v) == 1: metadata[k] = v[0]
#else: raise Exception("Unknown mutagen %s:%s" % (k,str(v)))
else: metadata[k] = v
self.__metadata = {}
# Start populating a dictionary of airtime metadata in __metadata
for muta_k, muta_v in metadata.iteritems():
# We must check if we can actually translate the mutagen key into
# an airtime key before doing the conversion
if muta_k in mutagen2airtime:
airtime_key = mutagen2airtime[muta_k]
# Apply truncation in the case where airtime_key is in our
# truncation table
muta_v = \
truncate_to_length(muta_v, truncate_table[airtime_key])\
if airtime_key in truncate_table else muta_v
self.__metadata[ airtime_key ] = muta_v
self.__metadata = Metadata.airtime_dict(full_mutagen)
# Now we extra the special values that are calculated from the mutagen
# object itself:
for special_key,f in airtime_special.iteritems():
new_val = f(full_mutagen)
if new_val is not None:
self.__metadata[special_key] = f(full_mutagen)
self.__metadata[special_key] = new_val
# Finally, we "normalize" all the metadata here:
self.__metadata = mmp.normalized_metadata(self.__metadata, fpath)
# Now we must load the md5: