def set_cuesheet(self, cuesheet):
"""imports cuesheet data from a Sheet object
Raises IOError if an error occurs setting the cuesheet"""
import os.path
from io import BytesIO
from audiotools import (MetaData, Filename, FS_ENCODING)
from audiotools.ape import ApeTag
from audiotools.cue import write_cuesheet
if (cuesheet is None):
return self.delete_cuesheet()
metadata = self.get_metadata()
if (metadata is None):
metadata = ApeTag([])
else:
metadata = ApeTag.converted(metadata)
cuesheet_data = BytesIO()
write_cuesheet(cuesheet,
u"%s" % (Filename(self.filename).basename(), ),
cuesheet_data)
metadata[b'Cuesheet'] = ApeTag.ITEM.string(
b'Cuesheet',
cuesheet_data.getvalue().decode(FS_ENCODING, 'replace'))
self.update_metadata(metadata)
def set_cuesheet(self, cuesheet):
"""imports cuesheet data from a Sheet object
Raises IOError if an error occurs setting the cuesheet"""
import os.path
from io import BytesIO
from audiotools import (MetaData, Filename, FS_ENCODING)
from audiotools.ape import ApeTag
from audiotools.cue import write_cuesheet
if (cuesheet is None):
return self.delete_cuesheet()
metadata = self.get_metadata()
if (metadata is None):
metadata = ApeTag([])
else:
metadata = ApeTag.converted(metadata)
cuesheet_data = BytesIO()
write_cuesheet(cuesheet,
u"%s" % (Filename(self.filename).basename(),),
cuesheet_data)
metadata[b'Cuesheet'] = ApeTag.ITEM.string(
b'Cuesheet',
cuesheet_data.getvalue().decode(FS_ENCODING, 'replace'))
self.update_metadata(metadata)
def get_metadata(self):
"""returns a MetaData object, or None
raises IOError if unable to read the file"""
f = open(self.filename, "rb")
# first, attempt to find APEv2 comment at end of file
f.seek(-32, 2)
if (f.read(10) == "APETAGEX\xd0\x07"):
from audiotools import ApeTag
return ApeTag.read(f)
else:
# then, look for ID3v2 comment at beginning of file
f.seek(0, 0)
if (f.read(3) == "ID3"):
from audiotools.id3 import read_id3v2_comment
try:
id3v2 = read_id3v2_comment(self.filename)
except ValueError:
id3v2 = None
else:
id3v2 = None
# and look for ID3v1 comment at end of file
try:
f.seek(-128, 2)
if (f.read(3) == "TAG"):
from audiotools.id3v1 import ID3v1Comment
try:
id3v1 = ID3v1Comment.parse(f)
except ValueError:
id3v1 = None
else:
id3v1 = None
except IOError:
id3v1 = None
# if both ID3v2 and ID3v1 are present, return a pair
if ((id3v2 is not None) and (id3v1 is not None)):
from audiotools.id3 import ID3CommentPair
return ID3CommentPair(id3v2, id3v1)
elif (id3v2 is not None):
return id3v2
else:
return id3v1
def get_metadata(self):
"""returns a MetaData object, or None
raises IOError if unable to read the file"""
f = open(self.filename, "rb")
# first, attempt to find APEv2 comment at end of file
f.seek(-32, 2)
if (f.read(10) == "APETAGEX\xd0\x07"):
from audiotools import ApeTag
return ApeTag.read(f)
else:
# then, look for ID3v2 comment at beginning of file
f.seek(0, 0)
if (f.read(3) == "ID3"):
from audiotools.id3 import read_id3v2_comment
try:
id3v2 = read_id3v2_comment(self.filename)
except ValueError:
id3v2 = None
else:
id3v2 = None
# and look for ID3v1 comment at end of file
try:
f.seek(-128, 2)
if (f.read(3) == "TAG"):
from audiotools.id3v1 import ID3v1Comment
try:
id3v1 = ID3v1Comment.parse(f)
except ValueError:
id3v1 = None
else:
id3v1 = None
except IOError:
id3v1 = None
# if both ID3v2 and ID3v1 are present, return a pair
if ((id3v2 is not None) and (id3v1 is not None)):
from audiotools.id3 import ID3CommentPair
return ID3CommentPair(id3v2, id3v1)
elif (id3v2 is not None):
return id3v2
else:
return id3v1
def set_replay_gain(self, replaygain):
"""given a ReplayGain object, sets the track's gain to those values
may raise IOError if unable to read or write the file"""
if (replaygain is None):
return self.delete_replay_gain()
from audiotools.ape import ApeTag
metadata = self.get_metadata()
if ((metadata is None) or (isinstance(metadata, ApeTag))):
ApeGainedAudio.set_replay_gain(self, replaygain)
else:
metadata = ApeTag.converted(metadata)
self.update_metadata(metadata)
ApeGainedAudio.set_replay_gain(self, replaygain)
def set_replay_gain(self, replaygain):
"""given a ReplayGain object, sets the track's gain to those values
may raise IOError if unable to read or write the file"""
if (replaygain is None):
return self.delete_replay_gain()
from audiotools.ape import ApeTag
metadata = self.get_metadata()
if ((metadata is None) or (isinstance(metadata, ApeTag))):
ApeGainedAudio.set_replay_gain(self, replaygain)
else:
metadata = ApeTag.converted(metadata)
self.update_metadata(metadata)
ApeGainedAudio.set_replay_gain(self, replaygain)
def set_metadata(self, metadata):
"""takes a MetaData object and sets this track's metadata
this metadata includes track name, album name, and so on
raises IOError if unable to write the file"""
import os
from audiotools.ape import ApeTag
from audiotools.bitstream import BitstreamWriter
if (metadata is None):
return
else:
new_metadata = ApeTag.converted(metadata)
if (not os.access(self.filename, os.W_OK)):
raise IOError(self.filename)
# if current metadata is present and in a particular format
# set_metadata() should continue using that format
old_metadata = ApeTag.converted(self.get_metadata())
if (old_metadata is not None):
# transfer ReplayGain tags from old metadata to new metadata
for tag in [b"replaygain_track_gain",
b"replaygain_track_peak",
b"replaygain_album_gain",
b"replaygain_album_peak"]:
try:
# if old_metadata has tag, shift it over
new_metadata[tag] = old_metadata[tag]
except KeyError:
try:
# otherwise, if new_metadata has tag, delete it
del(new_metadata[tag])
except KeyError:
# if neither has tag, ignore it
continue
# transfer Cuesheet from old metadata to new metadata
if (b"Cuesheet" in old_metadata):
new_metadata[b"Cuesheet"] = old_metadata[b"Cuesheet"]
elif (b"Cuesheet" in new_metadata):
del(new_metadata[b"Cuesheet"])
self.update_metadata(new_metadata)
else:
# delete ReplayGain tags from new metadata
for tag in [b"replaygain_track_gain",
b"replaygain_track_peak",
b"replaygain_album_gain",
b"replaygain_album_peak"]:
try:
del(new_metadata[tag])
except KeyError:
continue
# delete Cuesheet from new metadata
if (b"Cuesheet" in new_metadata):
del(new_metadata[b"Cuesheet"])
# no current metadata, so append a fresh APEv2 tag
with BitstreamWriter(open(self.filename, "ab"), True) as writer:
new_metadata.build(writer)
def set_metadata(self, metadata):
"""takes a MetaData object and sets this track's metadata
this metadata includes track name, album name, and so on
raises IOError if unable to write the file"""
import os
from audiotools.ape import ApeTag
from audiotools.bitstream import BitstreamWriter
if (metadata is None):
return
else:
new_metadata = ApeTag.converted(metadata)
if (not os.access(self.filename, os.W_OK)):
raise IOError(self.filename)
# if current metadata is present and in a particular format
# set_metadata() should continue using that format
old_metadata = ApeTag.converted(self.get_metadata())
if (old_metadata is not None):
# transfer ReplayGain tags from old metadata to new metadata
for tag in [
b"replaygain_track_gain", b"replaygain_track_peak",
b"replaygain_album_gain", b"replaygain_album_peak"
]:
try:
# if old_metadata has tag, shift it over
new_metadata[tag] = old_metadata[tag]
except KeyError:
try:
# otherwise, if new_metadata has tag, delete it
del (new_metadata[tag])
except KeyError:
# if neither has tag, ignore it
continue
# transfer Cuesheet from old metadata to new metadata
if (b"Cuesheet" in old_metadata):
new_metadata[b"Cuesheet"] = old_metadata[b"Cuesheet"]
elif (b"Cuesheet" in new_metadata):
del (new_metadata[b"Cuesheet"])
self.update_metadata(new_metadata)
else:
# delete ReplayGain tags from new metadata
for tag in [
b"replaygain_track_gain", b"replaygain_track_peak",
b"replaygain_album_gain", b"replaygain_album_peak"
]:
try:
del (new_metadata[tag])
except KeyError:
continue
# delete Cuesheet from new metadata
if (b"Cuesheet" in new_metadata):
del (new_metadata[b"Cuesheet"])
# no current metadata, so append a fresh APEv2 tag
with BitstreamWriter(open(self.filename, "ab"), True) as writer:
new_metadata.build(writer)
