84 lines
2.1 KiB
Python
84 lines
2.1 KiB
Python
import mutagen
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import mutagen.id3
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import mutagen.easyid3
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# TODO: custom interface to tracknumber/tracktotal/disc...
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def popms(id3):
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for k, v in id3.iteritems():
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if k.startswith('POPM'):
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yield k, v
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def byte2rating(b):
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if b >= 224: return 5
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if b >= 160: return 4
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if b >= 96: return 3
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if b >= 32: return 2
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if b >= 1: return 1
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return 0
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def rating2byte(r):
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if r == 5: return 256
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if r == 4: return 192
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if r == 3: return 128
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if r == 2: return 64
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if r == 1: return 1
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return 0
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def rating_get(id3, key):
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try:
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rating = id3['TXXX:RATING']
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except KeyError:
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try:
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_, popm = popms(id3).next()
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except StopIteration:
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return []
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else:
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return [byte2rating(popm.rating)]
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else:
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return list(rating.text)
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def _canconv(r):
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try:
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if int(r) != str(int(r)):
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return False
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return int(r) >= 1 and int(r) <= 5
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except ValueError, TypeError:
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return False
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def rating_set(id3, key, val):
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rating_delete(id3, key)
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if _canconv(val):
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popm = mutagen.id3.POPM()
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popm.email = "Windows Media Player 9 Series"
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popm.count = 0
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popm.rating = rating2byte(int(val))
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id3.add(popm)
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else:
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if 'TXXX:RATING' in id3:
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del(id3['TXXX:RATING'])
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id3.add(mutagen.id3.TXXX(encoding=3, desc='RATING', text=unicode(val)))
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def rating_delete(id3, key):
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for k, v in popms(id3):
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del(id3[k])
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if 'TXXX:RATING' in id3:
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del(id3['TXXX:RATING'])
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def tracknumber_get(id3, key):
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# TODO: use for both track and disc
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pass
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def tracknumber_set(id3, key, val):
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pass
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def tracknumber_delete(id3, key):
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pass
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replaygain_tags = ('replaygain_album_gain', 'replaygain_album_peak', \
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'replaygain_track_gain', 'replaygain_track_peak')
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for tag in replaygain_tags:
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mutagen.easyid3.EasyID3.RegisterTXXXKey(tag, tag)
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mutagen.easyid3.EasyID3.RegisterTXXXKey('sync', 'SYNC')
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mutagen.easyid3.EasyID3.RegisterKey('rating', rating_get, rating_set, rating_delete)
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