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taglib.py
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taglib.py
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# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# - Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# - Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# References:
#
# Genres: http://www.multimediasoft.com/amp3dj/help/amp3dj_00003e.htm
# MP3: http://www.mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm
# ID3v1: http://en.wikipedia.org/wiki/Id3#Layout
# ID3v2: http://www.id3.org/Developer_Information
# RVA: http://git.savannah.gnu.org/cgit/gnupod.git/tree/src/ext/FileMagic.pm
# IFF: http://en.wikipedia.org/wiki/Interchange_File_Format
# RIFF: http://www.midi.org/about-midi/rp29spec(rmid).pdf
# MP4: http://atomicparsley.sourceforge.net/mpeg-4files.html
# Vorbis: http://www.xiph.org/vorbis/doc/v-comment.html
# FLAC: http://flac.sourceforge.net/format.html#stream
# OGG: http://en.wikipedia.org/wiki/Ogg#File_format
# CRC: http://www.ross.net/crc/download/crc_v3.txt
from __future__ import with_statement
import sys
if sys.hexversion < 0x02060200:
print >> sys.stderr, 'Sorry, Python 2.6 is required'
sys.exit(0)
from struct import error as StructError, Struct
from collections import MutableMapping
from math import log
import os
import re
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
try:
from PIL import Image
from PIL.ImageFile import ImageFile
PIL = True
except ImportError:
PIL = False
__version__ = '3.1'
__author__ = 'Chris Jones <[email protected]>'
__all__ = ['tagopen', 'InvalidMedia', 'ValidationError']
DEFAULT_ID3V2_VERSION = 2
DEFAULT_PADDING = 128
MP3_SAMPLESIZE = 5762
ANYITEM = -1
GAPLESS = u'iTunPGAP'
ENCODING = sys.getfilesystemencoding()
BLOCKSIZE = 4096
(DICT, IDICT, TEXT, UINT16, BOOL, UINT16X2,
GENRE, IMAGE, UINT32, VOLUME) = xrange(10)
TYPES = {'_comment': DICT,
'_image': IDICT,
'_lyrics': DICT,
'_unknown': DICT,
'album': TEXT,
'album_artist': TEXT,
'artist': TEXT,
'bpm': UINT16,
'comment': TEXT,
'compilation': BOOL,
'composer': TEXT,
'disk': UINT16X2,
'encoder': TEXT,
'gapless': BOOL,
'genre': GENRE,
'grouping': TEXT,
'image': IMAGE,
'lyrics': TEXT,
'name': TEXT,
'sort_album': TEXT,
'sort_album_artist': TEXT,
'sort_artist': TEXT,
'sort_composer': TEXT,
'sort_name': TEXT,
'sort_video_show': TEXT,
'track': UINT16X2,
'video_description': TEXT,
'video_episode': UINT32,
'video_episode_id': TEXT,
'video_season': UINT32,
'video_show': TEXT,
'volume': VOLUME,
'year': UINT16}
DISPLAY = [('Info',
(('Filename', 'filename'),
('Name', 'name'),
('Artist', 'artist'),
('Album Artist', 'album_artist'),
('Album', 'album'),
('Grouping', 'grouping'),
('Composer', 'composer'),
('Comments', 'comment'),
('Genre', 'genre'),
('Year', 'year'),
('Track Number', 'track'),
('Disc Number', 'disk'),
('BPM', 'bpm'),
('Part of a compilation', 'compilation'))),
('Video',
(('Show', 'video_show'),
('Episode ID', 'video_episode_id'),
('Description', 'video_description'),
('Season Number', 'video_season'),
('Episode Number', 'video_episode'))),
('Sorting',
(('Sort Name', 'sort_name'),
('Sort Artist', 'sort_artist'),
('Sort Album Artist', 'sort_album_artist'),
('Sort Album', 'sort_album'),
('Sort Composer', 'sort_composer'),
('Sort Show', 'sort_video_show'))),
('Misc',
(('Volume Adjustment', 'volume'),
('Part of a gapless album', 'gapless'),
('Artwork', 'image'),
('Encoder', 'encoder'),
('Lyrics', 'lyrics')))]
GENRES = ['Blues', 'Classic Rock', 'Country', 'Dance', 'Disco', 'Funk',
'Grunge', 'Hip-Hop', 'Jazz', 'Metal', 'New Age', 'Oldies', 'Other',
'Pop', 'R&B', 'Rap', 'Reggae', 'Rock', 'Techno', 'Industrial',
'Alternative', 'Ska', 'Death Metal', 'Pranks', 'Soundtrack',
'Euro-Techno', 'Ambient', 'Trip-Hop', 'Vocal', 'Jazz+Funk', 'Fusion',
'Trance', 'Classical', 'Instrumental', 'Acid', 'House', 'Game',
'Sound Clip', 'Gospel', 'Noise', 'Alternative Rock', 'Bass', 'Soul',
'Punk', 'Space', 'Meditative', 'Instrumental Pop',
'Instrumental Rock', 'Ethnic', 'Gothic', 'Darkwave',
'Techno-Industrial', 'Electronic', 'Pop-Folk', 'Eurodance', 'Dream',
'Southern Rock', 'Comedy', 'Cult', 'Gangsta', 'Top 40',
'Christian Rap', 'Pop/Funk', 'Jungle', 'Native US', 'Cabaret',
'New Wave', 'Psychadelic', 'Rave', 'Showtunes', 'Trailer', 'Lo-Fi',
'Tribal', 'Acid Punk', 'Acid Jazz', 'Polka', 'Retro', 'Musical',
'Rock & Roll', 'Hard Rock', 'Folk', 'Folk-Rock', 'National Folk',
'Swing', 'Fast Fusion', 'Bebob', 'Latin', 'Revival', 'Celtic',
'Bluegrass', 'Avantgarde', 'Gothic Rock', 'Progressive Rock',
'Psychedelic Rock', 'Symphonic Rock', 'Slow Rock', 'Big Band',
'Chorus', 'Easy Listening', 'Acoustic', 'Humour', 'Speech',
'Chanson', 'Opera', 'Chamber Music', 'Sonata', 'Symphony',
'Booty Bass', 'Primus', 'Porn Groove', 'Satire', 'Slow Jam', 'Club',
'Tango', 'Samba', 'Folklore', 'Ballad', 'Power Ballad',
'Rhythmic Soul', 'Freestyle', 'Duet', 'Punk Rock', 'Drum Solo',
'Acapella', 'Euro-House', 'Dance Hall', 'Goa', 'Drum & Bass',
'Club - House', 'Hardcore', 'Terror', 'Indie', 'BritPop',
'Negerpunk', 'Polsk Punk', 'Beat', 'Christian Gangsta Rap',
'Heavy Metal', 'Black Metal', 'Crossover', 'Contemporary Christian',
'Christian Rock', 'Merengue', 'Salsa', 'Thrash Metal', 'Anime',
'JPop', 'Synthpop']
BOOLEANS = {True: ['true', 't', 'yes', 'y', 'on', '1', 1, '\x01'],
False: ['false', 'f', 'no', 'n', 'off', '0', 0]}
ID3V1_ATTRS = ['name', 'artist', 'album', 'year', 'comment', 'track', 'genre']
ID3V2_OPTS = {2: {'head': Struct('3s 3s 0s'),
'syncsafe': False,
'tags': {'COM': '_comment',
'PIC': '_image',
'RVA': 'volume',
'TAL': 'album',
'TBP': 'bpm',
'TCM': 'composer',
'TCO': 'genre',
'TCP': 'compilation',
'TEN': 'encoder',
'TP1': 'artist',
'TP2': 'album_artist',
'TPA': 'disk',
'TRK': 'track',
'TS2': 'sort_album_artist',
'TSA': 'sort_album',
'TSC': 'sort_composer',
'TSP': 'sort_artist',
'TST': 'sort_name',
'TT1': 'grouping',
'TT2': 'name',
'TT3': 'video_description',
'TYE': 'year',
'ULT': '_lyrics'}},
3: {'head': Struct('4s 4s 2s'),
'syncsafe': False,
'tags': {'APIC': '_image',
'COMM': '_comment',
'RVAD': 'volume',
'TALB': 'album',
'TBPM': 'bpm',
'TCMP': 'compilation',
'TCOM': 'composer',
'TCON': 'genre',
'TENC': 'encoder',
'TIT1': 'grouping',
'TIT2': 'name',
'TIT3': 'video_description',
'TPE1': 'artist',
'TPE2': 'album_artist',
'TPOS': 'disk',
'TRCK': 'track',
'TSO2': 'sort_album_artist',
'TSOA': 'sort_album',
'TSOC': 'sort_composer',
'TSOP': 'sort_artist',
'TSOT': 'sort_name',
'TYER': 'year',
'USLT': '_lyrics'}},
4: {'head': Struct('4s 4s 2s'),
'syncsafe': True,
'tags': {'APIC': '_image',
'COMM': '_comment',
'RVA2': 'volume',
'TALB': 'album',
'TBPM': 'bpm',
'TCMP': 'compilation',
'TCOM': 'composer',
'TCON': 'genre',
'TDRC': 'year',
'TENC': 'encoder',
'TIT1': 'grouping',
'TIT2': 'name',
'TIT3': 'video_description',
'TPE1': 'artist',
'TPE2': 'album_artist',
'TPOS': 'disk',
'TRCK': 'track',
'TSO2': 'sort_album_artist',
'TSOA': 'sort_album',
'TSOC': 'sort_composer',
'TSOP': 'sort_artist',
'TSOT': 'sort_name',
'USLT': '_lyrics'}}}
ID3V2_TAGS = dict((tag, attr) for opts in ID3V2_OPTS.itervalues()
for tag, attr in opts['tags'].iteritems())
ID3V2_ENCODINGS = {'\x00': ('latin-1', '\x00'),
'\x01': ('utf-16', '\x00\x00'),
'\x02': ('utf-16-be', '\x00\x00'),
'\x03': ('utf-8', '\x00')}
MP3_BITRATES = [
[32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 0],
[32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 0],
[32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0],
[32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 0],
[8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0]]
MP3_SRATES = [[11025, 12000, 8000], None,
[22050, 24000, 16000], [44100, 48000, 32000]]
IFFIDS = {'ANNO': 'comment',
'AUTH': 'artist',
'IART': 'artist',
'ICMT': 'comment',
'ICRD': 'year',
'INAM': 'name',
'NAME': 'name'}
ATOM_NODE1, ATOM_NODE2, ATOM_DATA = xrange(3)
ATOMS = {'moov': (ATOM_NODE1, None),
'moov.udta': (ATOM_NODE1, None),
'moov.udta.meta': (ATOM_NODE2, None),
'moov.udta.meta.ilst': (ATOM_NODE1, None),
'moov.udta.meta.ilst.aART': (ATOM_DATA, 'album_artist'),
'moov.udta.meta.ilst.covr': (ATOM_DATA, 'image'),
'moov.udta.meta.ilst.cpil': (ATOM_DATA, 'compilation'),
'moov.udta.meta.ilst.desc': (ATOM_DATA, 'video_description'),
'moov.udta.meta.ilst.disk': (ATOM_DATA, 'disk'),
'moov.udta.meta.ilst.gnre': (ATOM_DATA, 'genre'),
'moov.udta.meta.ilst.pgap': (ATOM_DATA, 'gapless'),
'moov.udta.meta.ilst.soaa': (ATOM_DATA, 'sort_album_artist'),
'moov.udta.meta.ilst.soal': (ATOM_DATA, 'sort_album'),
'moov.udta.meta.ilst.soar': (ATOM_DATA, 'sort_artist'),
'moov.udta.meta.ilst.soco': (ATOM_DATA, 'sort_composer'),
'moov.udta.meta.ilst.sonm': (ATOM_DATA, 'sort_name'),
'moov.udta.meta.ilst.sosn': (ATOM_DATA, 'sort_video_show'),
'moov.udta.meta.ilst.tmpo': (ATOM_DATA, 'bpm'),
'moov.udta.meta.ilst.trkn': (ATOM_DATA, 'track'),
'moov.udta.meta.ilst.tven': (ATOM_DATA, 'video_episode_id'),
'moov.udta.meta.ilst.tves': (ATOM_DATA, 'video_episode'),
'moov.udta.meta.ilst.tvsh': (ATOM_DATA, 'video_show'),
'moov.udta.meta.ilst.tvsn': (ATOM_DATA, 'video_season'),
'moov.udta.meta.ilst.\xa9ART': (ATOM_DATA, 'artist'),
'moov.udta.meta.ilst.\xa9alb': (ATOM_DATA, 'album'),
'moov.udta.meta.ilst.\xa9cmt': (ATOM_DATA, 'comment'),
'moov.udta.meta.ilst.\xa9day': (ATOM_DATA, 'year'),
'moov.udta.meta.ilst.\xa9gen': (ATOM_DATA, 'genre'),
'moov.udta.meta.ilst.\xa9grp': (ATOM_DATA, 'grouping'),
'moov.udta.meta.ilst.\xa9lyr': (ATOM_DATA, 'lyrics'),
'moov.udta.meta.ilst.\xa9nam': (ATOM_DATA, 'name'),
'moov.udta.meta.ilst.\xa9too': (ATOM_DATA, 'encoder'),
'moov.udta.meta.ilst.\xa9wrt': (ATOM_DATA, 'composer')}
VORBISTAGS = {'album': 'album',
'album artist': 'album_artist',
'album_artist': 'album_artist',
'albumartist': 'album_artist',
'artist': 'artist',
'beats per minute': 'bpm',
'beats_per_minute': 'bpm',
'beatsperminute': 'bpm',
'bpm': 'bpm',
'comment': 'comment',
'comments': 'comment',
'compilation': 'compilation',
'composer': 'composer',
'date': 'year',
'disc': 'disk',
'disc number': 'disk',
'disc_number': 'disk',
'discnumber': 'disk',
'disk': 'disk',
'disk number': 'disk',
'disk_number': 'disk',
'disknumber': 'disk',
'encoder': 'encoder',
'gapless': 'gapless',
'gapless playback': 'gapless',
'gapless_playback': 'gapless',
'gaplessplayback': 'gapless',
'genre': 'genre',
'grouping': 'grouping',
'lyrics': 'lyrics',
'name': 'name',
'sort album': 'sort_album',
'sort album artist': 'sort_album_artist',
'sort artist': 'sort_artist',
'sort composer': 'sort_composer',
'sort name': 'sort_name',
'sort video show': 'sort_video_show',
'sort_album': 'sort_album',
'sort_album_artist': 'sort_album_artist',
'sort_artist': 'sort_artist',
'sort_composer': 'sort_composer',
'sort_name': 'sort_name',
'sort_video_show': 'sort_video_show',
'sortalbum': 'sort_album',
'sortalbumartist': 'sort_album_artist',
'sortartist': 'sort_artist',
'sortcomposer': 'sort_composer',
'sortname': 'sort_name',
'sortvideoshow': 'sort_video_show',
'tempo': 'bpm',
'title': 'name',
'track': 'track',
'track number': 'track',
'track_number': 'track',
'tracknumber': 'track',
'video description': 'video_description',
'video episode': 'video_episode',
'video episode id': 'video_episode_id',
'video season': 'video_season',
'video show': 'video_show',
'video_description': 'video_description',
'video_episode': 'video_episode',
'video_episode_id': 'video_episode_id',
'video_season': 'video_season',
'video_show': 'video_show',
'videodescription': 'video_description',
'videoepisode': 'video_episode',
'videoepisodeid': 'video_episode_id',
'videoseason': 'video_season',
'videoshow': 'video_show',
'volume': 'volume',
'year': 'year'}
class TaglibError(Exception):
pass
class ValidationError(TaglibError):
pass
class DecodeError(TaglibError):
pass
class EncodeError(TaglibError):
pass
class InvalidMedia(TaglibError):
pass
class Container(MutableMapping):
types = {}
def __init__(self, *args, **kwargs):
self.__dict__.update(*args, **kwargs)
def getdisplay(self, attr):
return repr(self[attr])
def __getitem__(self, key):
return self.__getattribute__(key)
def __getattribute__(self, attr):
try:
return super(Container, self).__getattribute__(attr)
except AttributeError:
if attr not in self.types:
raise
def __setitem__(self, key, val):
self.__setattr__(key, val)
def __setattr__(self, attr, val):
super(Container, self).__setattr__(attr, self._validate(attr, val))
def __delitem__(self, key):
self.__delattr__(key)
def __delattr__(self, attr):
self._validate(attr)
try:
super(Container, self).__delattr__(attr)
except AttributeError:
if attr not in self.types:
raise
def __iter__(self):
return (attr for attr in sorted(self.types)
if not attr.startswith('_') and self[attr] is not None)
def __len__(self):
return sum(1 for _ in self.__iter__())
def __repr__(self):
attrs = ', '.join('%s=%s' % (i, self.getdisplay(i)) for i in self)
return '<%s object at 0x%x%s%s>' % (
type(self).__name__, id(self), ': ' if attrs else '', attrs)
@classmethod
def _validate(cls, attr, val=None):
try:
return cls.validate(val, cls.types[attr])
except KeyError:
return val
except ValidationError, error:
error.args = '%s: %s' % (attr, error),
raise
@staticmethod
def validate(val, type):
if val is not None and type is not None and not isinstance(val, type):
try:
val = type(val)
except Exception, error:
raise ValidationError(error)
return val
class Metadata(Container):
types = TYPES
@property
def image_sample(self):
if self.image:
val = StringIO()
self.image.save(val, self.image.format)
val.seek(0, os.SEEK_SET)
return val.read(512), self.image.size, self.image.format
@property
def rounded_volume(self):
if self.volume:
return '.%1f' % round(self.volume, 1)
def display(self, width=72, stream=None, filename=None, encoding=None):
if stream is None:
stream = sys.stdout
if filename is None:
try:
filename = os.path.basename(self.fp.name)
except AttributeError:
pass
if encoding is None:
encoding = ENCODING
hr = '-' * width
hasdata = False
for section, fields in DISPLAY:
lines = []
size = 0
for name, attr in fields:
if attr == 'filename':
val = filename
else:
val = self.getdisplay(attr)
if not val:
continue
if len(name) > size:
size = len(name)
lines.append((name, val))
if not lines:
continue
print >> stream, hr
print >> stream, section.center(width)
print >> stream, hr
for name, val in lines:
print >> stream, '%s: %s' % (name.rjust(size), val)
hasdata = True
if hasdata:
print >> stream, hr
else:
print >> stream, 'No metadata to display'
def getdisplay(self, attr, encoding=None):
if encoding is None:
encoding = ENCODING
val = self[attr]
if val is None:
return
type = self.types.get(attr)
if type == BOOL:
return 'yes' if val else 'no'
elif type in (GENRE, TEXT):
return val.encode(encoding, 'ignore')
elif type == IMAGE:
return '%dx%d %s Image' % (val.size[0], val.size[1], val.format)
elif type in (UINT16, UINT32):
return str(val)
elif type == UINT16X2:
return '%d/%d' % tuple(val)
elif type == VOLUME:
return '%.1f' % val
else:
return repr(val)
def __eq__(self, other):
if not isinstance(other, Metadata):
return NotImplemented
try:
self.compare(self, other)
except ValidationError:
return False
return True
def __ne__(self, other):
result = self.__eq__(other)
if result is NotImplemented:
return result
return not result
@staticmethod
def validate(val, type):
raise ValidationError('read-only')
@classmethod
def compare(cls, x, y):
for attr, type in cls.types.iteritems():
if type in (DICT, IDICT):
continue
if type == IMAGE:
xval, yval = x.image_sample, y.image_sample
elif type == VOLUME:
xval, yval = x.rounded_volume, y.rounded_volume
else:
xval, yval = x[attr], y[attr]
if xval != yval:
raise ValidationError('%s: %r != %r' % (attr, xval, yval))
class Open(object):
def __init__(self, file, mode='rb', close=True):
self.file = file
self.mode = mode
self.close = close
self.fp = None
self.external = None
self.pos = None
def __enter__(self):
if isinstance(self.file, basestring):
self.fp = open(self.file, self.mode)
self.external = False
elif isinstance(self.file, (int, long)):
self.fp = os.fdopen(self.file, self.mode)
self.external = True
elif hasattr(self.file, 'seek'):
self.fp = self.file
self.external = True
else:
raise TypeError('file must be a path, descriptor, fileobj')
if self.external:
self.pos = self.fp.tell()
return self.fp
def __exit__(self, *exc_info):
if self.external:
self.fp.seek(self.pos, os.SEEK_SET)
elif self.close:
self.fp.close()
class Decoder(Metadata):
format = None
editable = False
uint32be = Struct('> L')
int16be = Struct('> h')
uint16be = Struct('> H')
uint32le = Struct('< L')
def __init__(self, file):
if self.editable:
mode = 'rb+'
close = False
else:
mode = 'rb'
close = True
with Open(file, mode, close) as fp:
self.fp = fp
try:
self.decode()
except Errors, error:
raise InvalidMedia, error, sys.exc_traceback
self.modified = False
def save(self, *args, **kwargs):
if not self.editable:
raise EncodeError('encoding not formatted for %s' % self.format)
if self.fp.closed:
raise EncodeError('original file has closed')
kwargs['inplace'] = True
self.encode(self.fp, *args, **kwargs)
def dump(self, file=None, *args, **kwargs):
if file is None:
file = StringIO()
with Open(file, 'wb') as fp:
kwargs['inplace'] = False
self.encode(fp, *args, **kwargs)
if not fp.closed:
return fp
def dumps(self, *args, **kwargs):
return self.dump(None, *args, **kwargs).getvalue()
def unpack(self, struct):
val = struct.unpack(self.fp.read(struct.size))
if len(val) == 1:
return val[0]
return val
def __setattr__(self, attr, val):
super(Decoder, self).__setattr__(attr, val)
if attr in self.types:
self.modified = True
def __delattr__(self, attr):
super(Decoder, self).__delattr__(attr)
if attr in self.types:
self.modified = True
@staticmethod
def decode():
raise NotImplementedError
@staticmethod
def encode(fp, *args, **kwargs):
raise NotImplementedError
@classmethod
def validate(cls, val, type):
if val is None:
return
if type in (DICT, IDICT) and not isinstance(val, dict):
raise ValidationError('must be a dictionary')
elif type == GENRE:
if isinstance(val, (int, long)):
try:
val = GENRES[val]
except IndexError, error:
raise ValidationError(error)
type = TEXT
if type == TEXT and not isinstance(val, basestring):
val = str(val)
if type in (TEXT, UINT16, BOOL, UINT16X2, GENRE, UINT32, VOLUME):
if isinstance(val, str):
val = val.decode('ascii', 'ignore')
if isinstance(val, unicode):
val = val.replace('\x00', '').strip()
if not val:
return
if type in (UINT16, UINT32):
try:
val = int(val)
except ValueError, error:
raise ValidationError(error)
elif type == VOLUME:
try:
val = float(val)
except ValueError, error:
raise ValidationError(error)
elif type == BOOL:
val = val.lower()
if type == BOOL:
for bool, vals in BOOLEANS.iteritems():
if val in vals:
val = bool
break
else:
raise ValidationError('invalid boolean')
elif type == IMAGE:
if not PIL:
raise ValidationError('PIL required for image support')
if not isinstance(val, ImageFile):
try:
with Open(val, 'rb') as fp:
val = Image.open(fp)
val.load()
except (TypeError, IOError), error:
raise ValidationError(error)
elif type in (UINT16, UINT32):
if isinstance(val, float):
val = int(val)
elif not isinstance(val, (int, long)):
raise ValidationError('must be an integer')
elif type == VOLUME:
if isinstance(val, int):
val = float(val)
elif not isinstance(val, float):
raise ValidatinError('must be a float')
if val < -99.9:
val = -99.9
elif val > 100.0:
val = 100.0
if type == UINT16 and (val < 0 or val > 0xffff):
raise ValidationError('out of range of uint16')
elif type == UINT16X2:
if isinstance(val, (int, long)):
val = val, 0
elif isinstance(val, unicode):
val = val.split('/')
if isinstance(val, tuple):
val = list(val)
elif not isinstance(val, list):
raise ValidationError('invalid type for uint16x2')
if not val:
val = [0, 0]
elif len(val) == 1:
val.append(0)
elif len(val) != 2:
raise ValidationError('needs one or two members')
for i, item in enumerate(val):
if isinstance(item, basestring):
try:
item = int(item)
except ValueError:
item = 0
elif not isinstance(item, (int, long)):
raise ValidationError('each member must be a number')
if item < 0:
item = 0
elif item > 0xffff:
raise ValidationError('member out of range of uint16')
val[i] = item
if val == [0, 0]:
val = None
elif type == UINT32 and (val < 0 or val > 0xffffffff):
raise ValidationError('out of range of uint32')
if not val and type not in (DICT, IDICT):
val = None
return val
@staticmethod
def copyfile(src, dst, pos=None, end=None, blocksize=None):
if pos is None:
pos = src.tell()
if end is None:
src.seek(0, os.SEEK_END)
end = src.tell()
if blocksize is None:
blocksize = BLOCKSIZE
left = end - pos
src.seek(pos, os.SEEK_SET)
while left:
data = src.read(left if blocksize > left else blocksize)
if not data:
break
dst.write(data)
left -= len(data)
class MP3Frame(Container):
types = {'bitrate': int, 'copyright': bool, 'emphasis': int, 'ext': int,
'layer': int, 'mode': int, 'original': bool, 'padding': int,
'private': bool, 'protected': bool, 'srate': int, 'sync': bool,
'v2': bool, 'version': int}
class MP3(Decoder):
format = 'mp3'
editable = True
id3v1 = Struct('3s 30s 30s 30s 4s 30s B')
id3v2head = Struct('3s B B B 4s')
longbytes = Struct('4B')
tag_re = re.compile(r'^[A-Z0-9 ]{3,4}$')
genre_re = re.compile(r'^\((\d+)\)$')
track_re = re.compile(r'^(.+)\x00 ([^\x00])$')
fakemp3 = '\xff\xf2\x14\x00' * 7
def __init__(self, *args, **kwargs):
self.hasid3v1 = False
self.id3v1start = None
self.id3v1end = None
self.hasid3v2 = False
self.id3v2start = None
self.id3v2end = None
self.id3v2version = None
self.hasmp3 = False
self.mp3start = None
self.mp3end = None
super(MP3, self).__init__(*args, **kwargs)
def get_gapless(self):
return self.get_comment(key=GAPLESS)
def set_gapless(self, val):
self.set_comment(val, key=GAPLESS)
def del_gapless(self):
self.del_comment(key=GAPLESS)
gapless = property(get_gapless, set_gapless, del_gapless)
def get_comment(self, key=None, lang='eng'):
if key != ANYITEM:
key = lang, key
return self.getdict('_comment', key)
def set_comment(self, val, key=None, lang='eng'):
self.setdict('_comment', (lang, self.validate(key, TEXT)),
self.validate(val, BOOL if key == GAPLESS else TEXT))
def del_comment(self, key=None, lang='eng'):
if key != ANYITEM:
key = lang, key
return self.deldict('_comment', key)
comment = property(get_comment, set_comment, del_comment)
def get_lyrics(self, key=None, lang='eng'):
if key != ANYITEM:
key = lang, key
return self.getdict('_lyrics', key)
def set_lyrics(self, val, key=None, lang='eng'):
self.setdict('_lyrics', (lang, self.validate(key, TEXT)),
self.validate(val, TEXT))
def del_lyrics(self, key=None, lang='eng'):
if key != ANYITEM:
key = lang, key
return self.deldict('_lyrics', key)
lyrics = property(get_lyrics, set_lyrics, del_lyrics)
def get_image(self, key=ANYITEM):
if key != ANYITEM:
key = key,
image = self.getdict('_image', key)
if image:
return image[0]
def set_image(self, val, key=None, ptype=3):
self.setdict('_image', (self.validate(key, TEXT),),
(self.validate(val, IMAGE), ptype))
def del_image(self, key=ANYITEM):
if key != ANYITEM:
key = key,
self.deldict('_image', key)
image = property(get_image, set_image, del_image)
def getdict(self, attr, key):
dict = self[attr]
if dict:
if key == ANYITEM:
key = sorted(dict)[0]
return dict.get(key)
def setdict(self, attr, key, val):
if val is None:
self.deldict(attr, key)
else:
dict = self[attr]
if not dict:
dict = self[attr] = {}
dict[key] = val
def deldict(self, attr, key):
dict = self[attr]
if dict:
if key == ANYITEM:
key = sorted(dict)[0]
try:
del dict[key]
if not dict:
del self[attr]
except KeyError:
pass
@property
def mp3frames(self):
if self.hasmp3:
self.fp.seek(self.mp3start, os.SEEK_SET)
hsize = self.uint32be.size
size = 0
while True:
head = self.fp.read(hsize)
try:
flen = self.mp3framelen(head)
frame = head + self.fp.read(flen - hsize)
size += len(frame)
yield frame
except Errors:
break
self.mp3end = self.mp3start + size
def decode(self):
try:
self.decode_id3v1()
except Errors:
pass
try:
self.decode_id3v2()
except Errors:
pass
self.decode_mp3()
def decode_id3v1(self):
try:
self.fp.seek(self.id3v1.size * -1, os.SEEK_END)
tag = self.unpack(self.id3v1)
if tag[0] != 'TAG':
raise DecodeError('no id3v1 tag')
self.hasid3v1 = True
self.id3v1end = self.fp.tell()
self.id3v1start = self.id3v1end - self.id3v1.size
try:
self.name, self.artist, self.album, self.year = tag[1:5]
except ValidationError:
pass
if tag[5][28] == '\x00' and tag[5][29] != '\x00':
self.comment = tag[5][:28]
self.track = ord(tag[5][29])
else:
try:
comment, track = self.track_re.search(tag[5]).groups()
self.comment = comment
self.track = ord(track)
except AttributeError:
self.comment = tag[5]
self.genre = tag[6]
except Errors: