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"""
if (metadata is None):
return
elif (self.get_metadata() is not None):
#current file has metadata, so replace it with new metadata
self.update_metadata(ID3v22Comment.converted(metadata))
else:
#current file has no metadata, so append new ID3 block
import tempfile
from .bitstream import BitstreamRecorder
def chunk_filter(chunks, id3_chunk_data):
for chunk in chunks:
yield chunk
yield AIFF_Chunk("ID3 ",
len(id3_chunk_data),
id3_chunk_data)
#turn our ID3v2.2 tag into a raw binary chunk
id3_chunk = BitstreamRecorder(0)
ID3v22Comment.converted(metadata).build(id3_chunk)
id3_chunk = id3_chunk.data()
#generate a temporary AIFF file in which our new ID3v2.2 chunk
#is appended to the file's set of chunks
new_aiff = tempfile.NamedTemporaryFile(suffix=self.SUFFIX)
self.__class__.aiff_from_chunks(new_aiff.name,
chunk_filter(self.chunks(),
id3_chunk))
#replace the existing file with data from the temporary file
new_file = open(new_aiff.name, 'rb')
old_file = open(self.filename, 'wb')
transfer_data(new_file.read, old_file.write)
old_file.close()
new_file.close()
def get_metadata(self):
for (chunk_id, chunk_length, chunk_offset) in self.chunks():
if (chunk_id == 'ID3 '):
f = open(self.filename, 'rb')
f.seek(chunk_offset, 0)
id3 = ID3v22Comment.parse(f)
f.close()
return id3
else:
return None
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."""
if (metadata is None):
return
else:
self.update_metadata(ID3v22Comment.converted(metadata))
def get_metadata(self):
"""returns a MetaData object, or None
raises IOError if unable to read the file"""
from .bitstream import BitstreamReader
for chunk in self.chunks():
if (chunk.id == 'ID3 '):
return ID3v22Comment.parse(BitstreamReader(chunk.data(), 0))
else:
return None
def get_metadata(self):
"""Returns a MetaData object, or None.
Raises IOError if unable to read the file."""
from .bitstream import BitstreamReader
for (chunk_id, chunk_size, chunk_data) in self.chunks():
if (chunk_id == 'ID3 '):
return ID3v22Comment.parse(
BitstreamReader(cStringIO.StringIO(chunk_data), 0))
else:
return None
def get_metadata(self):
"""Returns a MetaData object, or None.
Raises IOError if unable to read the file."""
for (chunk_id, chunk_length, chunk_offset) in self.chunks():
if (chunk_id == 'ID3 '):
f = open(self.filename, 'rb')
f.seek(chunk_offset, 0)
id3 = ID3v22Comment.parse(f)
f.close()
return id3
else:
return None
def get_metadata(self):
"""Returns a MetaData object, or None.
Raises IOError if unable to read the file."""
for (chunk_id, chunk_length, chunk_offset) in self.chunks():
if (chunk_id == 'ID3 '):
f = open(self.filename, 'rb')
f.seek(chunk_offset, 0)
id3 = ID3v22Comment.parse(f)
f.close()
return id3
else:
return None
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."""
if (metadata is None):
return
import tempfile
id3_chunk = ID3v22Comment.converted(metadata).build()
new_aiff = tempfile.TemporaryFile()
new_aiff.seek(12, 0)
id3_found = False
for (chunk_id, chunk_length, chunk_file) in self.chunk_files():
if (chunk_id != 'ID3 '):
new_aiff.write(
self.CHUNK_HEADER.build(
Con.Container(chunk_id=chunk_id,
chunk_length=chunk_length)))
transfer_data(chunk_file.read, new_aiff.write)
else:
new_aiff.write(
self.CHUNK_HEADER.build(
Con.Container(chunk_id='ID3 ',
chunk_length=len(id3_chunk))))
new_aiff.write(id3_chunk)
id3_found = True
if (not id3_found):
new_aiff.write(
self.CHUNK_HEADER.build(
Con.Container(chunk_id='ID3 ',
chunk_length=len(id3_chunk))))
new_aiff.write(id3_chunk)
header = Con.Container(aiff_id='FORM',
aiff_size=new_aiff.tell() - 8,
aiff_type='AIFF')
new_aiff.seek(0, 0)
new_aiff.write(self.AIFF_HEADER.build(header))
new_aiff.seek(0, 0)
f = open(self.filename, 'wb')
transfer_data(new_aiff.read, f.write)
new_aiff.close()
f.close()
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."""
if (metadata is None):
return
import tempfile
id3_chunk = ID3v22Comment.converted(metadata).build()
new_aiff = tempfile.TemporaryFile()
new_aiff.seek(12, 0)
id3_found = False
for (chunk_id, chunk_length, chunk_file) in self.chunk_files():
if (chunk_id != 'ID3 '):
new_aiff.write(self.CHUNK_HEADER.build(
Con.Container(chunk_id=chunk_id,
chunk_length=chunk_length)))
transfer_data(chunk_file.read, new_aiff.write)
else:
new_aiff.write(self.CHUNK_HEADER.build(
Con.Container(chunk_id='ID3 ',
chunk_length=len(id3_chunk))))
new_aiff.write(id3_chunk)
id3_found = True
if (not id3_found):
new_aiff.write(self.CHUNK_HEADER.build(
Con.Container(chunk_id='ID3 ',
chunk_length=len(id3_chunk))))
new_aiff.write(id3_chunk)
header = Con.Container(
aiff_id='FORM',
aiff_size=new_aiff.tell() - 8,
aiff_type='AIFF')
new_aiff.seek(0, 0)
new_aiff.write(self.AIFF_HEADER.build(header))
new_aiff.seek(0, 0)
f = open(self.filename, 'wb')
transfer_data(new_aiff.read, f.write)
new_aiff.close()
f.close()
def set_metadata(self, metadata):
if (metadata is None):
return
import tempfile
id3_chunk = ID3v22Comment.converted(metadata).build()
new_aiff = tempfile.TemporaryFile()
new_aiff.seek(12, 0)
id3_found = False
for (chunk_id, chunk_length, chunk_file) in self.chunk_files():
if (chunk_id != 'ID3 '):
new_aiff.write(
self.CHUNK_HEADER.build(
construct.Container(chunk_id=chunk_id,
chunk_length=chunk_length)))
transfer_data(chunk_file.read, new_aiff.write)
else:
new_aiff.write(
self.CHUNK_HEADER.build(
construct.Container(chunk_id='ID3 ',
chunk_length=len(id3_chunk))))
new_aiff.write(id3_chunk)
id3_found = True
if (not id3_found):
new_aiff.write(
self.CHUNK_HEADER.build(
construct.Container(chunk_id='ID3 ',
chunk_length=len(id3_chunk))))
new_aiff.write(id3_chunk)
header = construct.Container(aiff_id='FORM',
aiff_size=new_aiff.tell() - 8,
aiff_type='AIFF')
new_aiff.seek(0, 0)
new_aiff.write(self.AIFF_HEADER.build(header))
new_aiff.seek(0, 0)
f = open(self.filename, 'wb')
transfer_data(new_aiff.read, f.write)
new_aiff.close()
f.close()
