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()