def delete_metadata(self):
"""deletes the track's MetaData
this removes or unsets tags as necessary in order to remove all data
raises IOError if unable to write the file"""
import os
from audiotools import (TemporaryFile,
LimitedFileReader,
transfer_data)
#this works a lot like update_metadata
#but without any new metadata to set
if (not os.access(self.filename, os.W_OK)):
raise IOError(self.filename)
new_mp3 = TemporaryFile(self.filename)
#get the original MP3 data
old_mp3 = open(self.filename, "rb")
MP3Audio.__find_last_mp3_frame__(old_mp3)
data_end = old_mp3.tell()
old_mp3.seek(0, 0)
MP3Audio.__find_mp3_start__(old_mp3)
data_start = old_mp3.tell()
old_mp3 = LimitedFileReader(old_mp3, data_end - data_start)
#write data to file
transfer_data(old_mp3.read, new_mp3.write)
#commit change to disk
old_mp3.close()
new_mp3.close()
def delete_metadata(self):
"""deletes the track's MetaData
this removes or unsets tags as necessary in order to remove all data
raises IOError if unable to write the file"""
import os
from audiotools import (transfer_data,
LimitedFileReader,
TemporaryFile)
from audiotools.id3 import skip_id3v2_comment
if (not os.access(self.filename, os.W_OK)):
raise IOError(self.filename)
# overwrite original with no tags attached
old_tta = open(self.filename, "rb")
skip_id3v2_comment(old_tta)
old_tta = LimitedFileReader(old_tta, self.data_size())
new_tta = TemporaryFile(self.filename)
transfer_data(old_tta.read, new_tta.write)
old_tta.close()
new_tta.close()
def delete_metadata(self):
"""deletes the track's MetaData
this removes or unsets tags as necessary in order to remove all data
raises IOError if unable to write the file"""
import os
from audiotools import (TemporaryFile, LimitedFileReader,
transfer_data)
#this works a lot like update_metadata
#but without any new metadata to set
if (not os.access(self.filename, os.W_OK)):
raise IOError(self.filename)
new_mp3 = TemporaryFile(self.filename)
#get the original MP3 data
old_mp3 = open(self.filename, "rb")
MP3Audio.__find_last_mp3_frame__(old_mp3)
data_end = old_mp3.tell()
old_mp3.seek(0, 0)
MP3Audio.__find_mp3_start__(old_mp3)
data_start = old_mp3.tell()
old_mp3 = LimitedFileReader(old_mp3, data_end - data_start)
#write data to file
transfer_data(old_mp3.read, new_mp3.write)
#commit change to disk
old_mp3.close()
new_mp3.close()
def delete_metadata(self):
"""deletes the track's MetaData
this removes or unsets tags as necessary in order to remove all data
raises IOError if unable to write the file"""
import os
from audiotools import (transfer_data,
LimitedFileReader,
TemporaryFile)
from audiotools.id3 import skip_id3v2_comment
if (not os.access(self.filename, os.W_OK)):
raise IOError(self.filename)
# overwrite original with no tags attached
old_tta = open(self.filename, "rb")
skip_id3v2_comment(old_tta)
old_tta = LimitedFileReader(old_tta, self.data_size())
new_tta = TemporaryFile(self.filename)
transfer_data(old_tta.read, new_tta.write)
old_tta.close()
new_tta.close()
def update_metadata(self, metadata):
"""takes this track's current MetaData object
as returned by get_metadata() and sets this track's metadata
with any fields updated in that object
raises IOError if unable to write the file
"""
import os
from audiotools import (TemporaryFile,
LimitedFileReader,
transfer_data)
from audiotools.id3 import (ID3v2Comment, ID3CommentPair)
from audiotools.id3v1 import ID3v1Comment
from audiotools.bitstream import BitstreamWriter
if (metadata is None):
return
elif (not (isinstance(metadata, ID3v2Comment) or
isinstance(metadata, ID3CommentPair) or
isinstance(metadata, ID3v1Comment))):
from .text import ERR_FOREIGN_METADATA
raise ValueError(ERR_FOREIGN_METADATA)
elif (not os.access(self.filename, os.W_OK)):
raise IOError(self.filename)
new_mp3 = TemporaryFile(self.filename)
#get the original MP3 data
old_mp3 = open(self.filename, "rb")
MP3Audio.__find_last_mp3_frame__(old_mp3)
data_end = old_mp3.tell()
old_mp3.seek(0, 0)
MP3Audio.__find_mp3_start__(old_mp3)
data_start = old_mp3.tell()
old_mp3 = LimitedFileReader(old_mp3, data_end - data_start)
#write id3v2 + data + id3v1 to file
if (isinstance(metadata, ID3CommentPair)):
metadata.id3v2.build(BitstreamWriter(new_mp3, 0))
transfer_data(old_mp3.read, new_mp3.write)
metadata.id3v1.build(new_mp3)
elif (isinstance(metadata, ID3v2Comment)):
metadata.build(BitstreamWriter(new_mp3, 0))
transfer_data(old_mp3.read, new_mp3.write)
elif (isinstance(metadata, ID3v1Comment)):
transfer_data(old_mp3.read, new_mp3.write)
metadata.build(new_mp3)
#commit change to disk
old_mp3.close()
new_mp3.close()
def update_metadata(self, metadata):
"""takes this track's current MetaData object
as returned by get_metadata() and sets this track's metadata
with any fields updated in that object
raises IOError if unable to write the file
"""
import os
from audiotools import (TemporaryFile,
LimitedFileReader,
transfer_data)
from audiotools.id3 import (ID3v2Comment, ID3CommentPair)
from audiotools.id3v1 import ID3v1Comment
from audiotools.bitstream import BitstreamWriter
if metadata is None:
return
elif (not (isinstance(metadata, ID3v2Comment) or
isinstance(metadata, ID3CommentPair) or
isinstance(metadata, ID3v1Comment))):
from audiotools.text import ERR_FOREIGN_METADATA
raise ValueError(ERR_FOREIGN_METADATA)
elif not os.access(self.filename, os.W_OK):
raise IOError(self.filename)
new_mp3 = TemporaryFile(self.filename)
# get the original MP3 data
old_mp3 = open(self.filename, "rb")
MP3Audio.__find_last_mp3_frame__(old_mp3)
data_end = old_mp3.tell()
old_mp3.seek(0, 0)
MP3Audio.__find_mp3_start__(old_mp3)
data_start = old_mp3.tell()
old_mp3 = LimitedFileReader(old_mp3, data_end - data_start)
# write id3v2 + data + id3v1 to file
if isinstance(metadata, ID3CommentPair):
metadata.id3v2.build(BitstreamWriter(new_mp3, False))
transfer_data(old_mp3.read, new_mp3.write)
metadata.id3v1.build(new_mp3)
elif isinstance(metadata, ID3v2Comment):
metadata.build(BitstreamWriter(new_mp3, False))
transfer_data(old_mp3.read, new_mp3.write)
elif isinstance(metadata, ID3v1Comment):
transfer_data(old_mp3.read, new_mp3.write)
metadata.build(new_mp3)
# commit change to disk
old_mp3.close()
new_mp3.close()
def data(self):
"""returns chunk data as file-like object"""
from audiotools import LimitedFileReader
self.__aiff_file__.seek(self.__offset__)
return LimitedFileReader(self.__aiff_file__, self.size())
def update_metadata(self, metadata):
"""takes this track's current MetaData object
as returned by get_metadata() and sets this track's metadata
with any fields updated in that object
raises IOError if unable to write the file
"""
import os
from audiotools.ape import ApeTag
from audiotools.id3 import ID3v2Comment
from audiotools.id3 import ID3CommentPair
from audiotools.id3v1 import ID3v1Comment
if (metadata is None):
return
elif (not os.access(self.filename, os.W_OK)):
raise IOError(self.filename)
# ensure metadata is APEv2, ID3v2, ID3v1, or ID3CommentPair
if (((not isinstance(metadata, ApeTag)) and
(not isinstance(metadata, ID3v2Comment)) and
(not isinstance(metadata, ID3CommentPair)) and
(not isinstance(metadata, ID3v1Comment)))):
from audiotools.text import ERR_FOREIGN_METADATA
raise ValueError(ERR_FOREIGN_METADATA)
current_metadata = self.get_metadata()
if (isinstance(metadata, ApeTag) and (current_metadata is None)):
# if new metadata is APEv2 and no current metadata,
# simply append APEv2 tag
from audiotools.bitstream import BitstreamWriter
with BitstreamWriter(open(self.filename, "ab"), True) as writer:
metadata.build(writer)
elif (isinstance(metadata, ApeTag) and
isinstance(current_metadata, ApeTag) and
(metadata.total_size() > current_metadata.total_size())):
# if new metadata is APEv2, current metadata is APEv2
# and new metadata is larger,
# overwrite old tag with new tag
from audiotools.bitstream import BitstreamWriter
with open(self.filename, "r+b") as f:
f.seek(-current_metadata.total_size(), 2)
metadata.build(BitstreamWriter(f, True))
else:
from audiotools.bitstream import BitstreamWriter
from audiotools import (transfer_data,
LimitedFileReader,
TemporaryFile)
from audiotools.id3 import skip_id3v2_comment
# otherwise, rebuild TTA with APEv2/ID3 tags in place
old_tta = open(self.filename, "rb")
skip_id3v2_comment(old_tta)
old_tta = LimitedFileReader(old_tta, self.data_size())
new_tta = TemporaryFile(self.filename)
if (isinstance(metadata, ApeTag)):
transfer_data(old_tta.read, new_tta.write)
metadata.build(BitstreamWriter(new_tta, True))
elif (isinstance(metadata, ID3CommentPair)):
metadata.id3v2.build(BitstreamWriter(new_tta, False))
transfer_data(old_tta.read, new_tta.write)
metadata.id3v1.build(new_tta)
elif (isinstance(metadata, ID3v2Comment)):
metadata.build(BitstreamWriter(new_tta, False))
transfer_data(old_tta.read, new_tta.write)
else:
# ID3v1Comment
transfer_data(old_tta.read, new_tta.write)
metadata.build(new_tta)
old_tta.close()
new_tta.close()
def update_metadata(self, metadata):
"""takes this track's current MetaData object
as returned by get_metadata() and sets this track's metadata
with any fields updated in that object
raises IOError if unable to write the file
"""
import os
from audiotools.ape import ApeTag
from audiotools.id3 import ID3v2Comment
from audiotools.id3 import ID3CommentPair
from audiotools.id3v1 import ID3v1Comment
if (metadata is None):
return
elif (not os.access(self.filename, os.W_OK)):
raise IOError(self.filename)
# ensure metadata is APEv2, ID3v2, ID3v1, or ID3CommentPair
if (((not isinstance(metadata, ApeTag))
and (not isinstance(metadata, ID3v2Comment))
and (not isinstance(metadata, ID3CommentPair))
and (not isinstance(metadata, ID3v1Comment)))):
from audiotools.text import ERR_FOREIGN_METADATA
raise ValueError(ERR_FOREIGN_METADATA)
current_metadata = self.get_metadata()
if (isinstance(metadata, ApeTag) and (current_metadata is None)):
# if new metadata is APEv2 and no current metadata,
# simply append APEv2 tag
from audiotools.bitstream import BitstreamWriter
with BitstreamWriter(open(self.filename, "ab"), True) as writer:
metadata.build(writer)
elif (isinstance(metadata, ApeTag)
and isinstance(current_metadata, ApeTag)
and (metadata.total_size() > current_metadata.total_size())):
# if new metadata is APEv2, current metadata is APEv2
# and new metadata is larger,
# overwrite old tag with new tag
from audiotools.bitstream import BitstreamWriter
with open(self.filename, "r+b") as f:
f.seek(-current_metadata.total_size(), 2)
metadata.build(BitstreamWriter(f, True))
else:
from audiotools.bitstream import BitstreamWriter
from audiotools import (transfer_data, LimitedFileReader,
TemporaryFile)
from audiotools.id3 import skip_id3v2_comment
# otherwise, rebuild TTA with APEv2/ID3 tags in place
old_tta = open(self.filename, "rb")
skip_id3v2_comment(old_tta)
old_tta = LimitedFileReader(old_tta, self.data_size())
new_tta = TemporaryFile(self.filename)
if (isinstance(metadata, ApeTag)):
transfer_data(old_tta.read, new_tta.write)
metadata.build(BitstreamWriter(new_tta, True))
elif (isinstance(metadata, ID3CommentPair)):
metadata.id3v2.build(BitstreamWriter(new_tta, False))
transfer_data(old_tta.read, new_tta.write)
metadata.id3v1.build(new_tta)
elif (isinstance(metadata, ID3v2Comment)):
metadata.build(BitstreamWriter(new_tta, False))
transfer_data(old_tta.read, new_tta.write)
else:
# ID3v1Comment
transfer_data(old_tta.read, new_tta.write)
metadata.build(new_tta)
old_tta.close()
new_tta.close()
