157 lines
5.9 KiB
Python
157 lines
5.9 KiB
Python
# -*- coding: utf-8 -*-
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import mutagen
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import os
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import copy
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from mutagen.easymp4 import EasyMP4KeyError
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from mutagen.easyid3 import EasyID3KeyError
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from media.monitor.exceptions import BadSongFile, InvalidMetadataElement
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from media.monitor.log import Loggable
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from media.monitor.pure import format_length
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import media.monitor.pure as mmp
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# emf related stuff
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from media.metadata.process import global_reader
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import media.metadata.definitions as defs
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defs.load_definitions()
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"""
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list of supported easy tags in mutagen version 1.20
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['albumartistsort', 'musicbrainz_albumstatus', 'lyricist', 'releasecountry',
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'date', 'performer', 'musicbrainz_albumartistid', 'composer', 'encodedby',
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'tracknumber', 'musicbrainz_albumid', 'album', 'asin', 'musicbrainz_artistid',
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'mood', 'copyright', 'author', 'media', 'length', 'version', 'artistsort',
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'titlesort', 'discsubtitle', 'website', 'musicip_fingerprint', 'conductor',
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'compilation', 'barcode', 'performer:*', 'composersort', 'musicbrainz_discid',
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'musicbrainz_albumtype', 'genre', 'isrc', 'discnumber', 'musicbrainz_trmid',
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'replaygain_*_gain', 'musicip_puid', 'artist', 'title', 'bpm',
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'musicbrainz_trackid', 'arranger', 'albumsort', 'replaygain_*_peak',
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'organization']
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"""
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airtime2mutagen = {
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"MDATA_KEY_TITLE" : "title",
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"MDATA_KEY_CREATOR" : "artist",
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"MDATA_KEY_SOURCE" : "album",
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"MDATA_KEY_GENRE" : "genre",
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"MDATA_KEY_MOOD" : "mood",
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"MDATA_KEY_TRACKNUMBER" : "tracknumber",
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"MDATA_KEY_BPM" : "bpm",
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"MDATA_KEY_LABEL" : "label",
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"MDATA_KEY_COMPOSER" : "composer",
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"MDATA_KEY_ENCODER" : "encodedby",
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"MDATA_KEY_CONDUCTOR" : "conductor",
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"MDATA_KEY_YEAR" : "date",
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"MDATA_KEY_URL" : "website",
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"MDATA_KEY_ISRC" : "isrc",
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"MDATA_KEY_COPYRIGHT" : "copyright",
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"MDATA_KEY_CUE_IN" : "cuein",
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"MDATA_KEY_CUE_OUT" : "cueout",
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}
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#doesn't make sense for us to write these values to a track's metadata
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mutagen_do_not_write = ["MDATA_KEY_CUE_IN", "MDATA_KEY_CUE_OUT"]
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# Some airtime attributes are special because they must use the mutagen object
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# itself to calculate the value that they need. The lambda associated with each
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# key should attempt to extract the corresponding value from the mutagen object
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# itself pass as 'm'. In the case when nothing can be extracted the lambda
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# should return some default value to be assigned anyway or None so that the
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# airtime metadata object will skip the attribute outright.
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airtime_special = {
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"MDATA_KEY_DURATION" :
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lambda m: format_length(getattr(m.info, u'length', 0.0)),
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"MDATA_KEY_BITRATE" :
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lambda m: getattr(m.info, "bitrate", ''),
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"MDATA_KEY_SAMPLERATE" :
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lambda m: getattr(m.info, u'sample_rate', 0),
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"MDATA_KEY_MIME" :
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lambda m: m.mime[0] if len(m.mime) > 0 else u'',
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}
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mutagen2airtime = dict( (v,k) for k,v in airtime2mutagen.iteritems()
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if isinstance(v, str) )
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truncate_table = {
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'MDATA_KEY_GENRE' : 64,
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'MDATA_KEY_TITLE' : 512,
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'MDATA_KEY_CREATOR' : 512,
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'MDATA_KEY_SOURCE' : 512,
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'MDATA_KEY_MOOD' : 64,
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'MDATA_KEY_LABEL' : 512,
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'MDATA_KEY_COMPOSER' : 512,
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'MDATA_KEY_ENCODER' : 255,
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'MDATA_KEY_CONDUCTOR' : 512,
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'MDATA_KEY_YEAR' : 16,
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'MDATA_KEY_URL' : 512,
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'MDATA_KEY_ISRC' : 512,
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'MDATA_KEY_COPYRIGHT' : 512,
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}
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class Metadata(Loggable):
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# TODO : refactor the way metadata is being handled. Right now things are a
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# little bit messy. Some of the handling is in m.m.pure while the rest is
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# here. Also interface is not very consistent
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# TODO : what is this shit? maybe get rid of it?
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@staticmethod
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def fix_title(path):
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# If we have no title in path we will format it
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# TODO : this is very hacky so make sure to fix it
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m = mutagen.File(path, easy=True)
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if u'title' not in m:
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new_title = unicode( mmp.no_extension_basename(path) )
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m[u'title'] = new_title
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m.save()
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@staticmethod
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def write_unsafe(path,md):
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"""
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Writes 'md' metadata into 'path' through mutagen. Converts all
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dictionary values to strings because mutagen will not write anything
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else
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"""
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if not os.path.exists(path): raise BadSongFile(path)
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song_file = mutagen.File(path, easy=True)
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exceptions = [] # for bad keys
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for airtime_k, airtime_v in md.iteritems():
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if airtime_k in airtime2mutagen and \
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airtime_k not in mutagen_do_not_write:
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# The unicode cast here is mostly for integers that need to be
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# strings
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if airtime_v is None: continue
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try:
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song_file[ airtime2mutagen[airtime_k] ] = unicode(airtime_v)
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except (EasyMP4KeyError, EasyID3KeyError) as e:
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exceptions.append(InvalidMetadataElement(e, airtime_k,
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path))
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song_file.save()
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# bubble dem up so that user knows that something is wrong
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for e in exceptions: raise e
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def __init__(self, fpath):
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# Forcing the unicode through
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try : fpath = fpath.decode("utf-8")
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except : pass
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self.__metadata = global_reader.read_mutagen(fpath)
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def is_recorded(self):
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"""
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returns true if the file has been created by airtime through recording
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"""
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return mmp.is_airtime_recorded( self.__metadata )
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def extract(self):
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"""
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returns a copy of the metadata that was loaded when object was
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constructed
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"""
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return copy.deepcopy(self.__metadata)
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def utf8(self):
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"""
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Returns a unicode aware representation of the data that is compatible
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with what is spent to airtime
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"""
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return mmp.convert_dict_value_to_utf8(self.extract())
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