/usr/lib/python2.7/dist-packages/mutagen/oggspeex.py is in python-mutagen 1.36-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 | # -*- coding: utf-8 -*-
# Copyright 2006 Joe Wreschnig
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
"""Read and write Ogg Speex comments.
This module handles Speex files wrapped in an Ogg bitstream. The
first Speex stream found is used.
Read more about Ogg Speex at http://www.speex.org/. This module is
based on the specification at http://www.speex.org/manual2/node7.html
and clarifications after personal communication with Jean-Marc,
http://lists.xiph.org/pipermail/speex-dev/2006-July/004676.html.
"""
__all__ = ["OggSpeex", "Open", "delete"]
from mutagen import StreamInfo
from mutagen._vorbis import VCommentDict
from mutagen.ogg import OggPage, OggFileType, error as OggError
from mutagen._util import cdata, get_size, loadfile, convert_error
from mutagen._tags import PaddingInfo
class error(OggError):
pass
class OggSpeexHeaderError(error):
pass
class OggSpeexInfo(StreamInfo):
"""OggSpeexInfo()
Ogg Speex stream information.
Attributes:
length (`float`): file length in seconds, as a float
channels (`int`): number of channels
bitrate (`int`): nominal bitrate in bits per second. The reference
encoder does not set the bitrate; in this case, the bitrate will
be 0.
"""
length = 0
channels = 0
bitrate = 0
def __init__(self, fileobj):
page = OggPage(fileobj)
while not page.packets[0].startswith(b"Speex "):
page = OggPage(fileobj)
if not page.first:
raise OggSpeexHeaderError(
"page has ID header, but doesn't start a stream")
self.sample_rate = cdata.uint_le(page.packets[0][36:40])
self.channels = cdata.uint_le(page.packets[0][48:52])
self.bitrate = max(0, cdata.int_le(page.packets[0][52:56]))
self.serial = page.serial
def _post_tags(self, fileobj):
page = OggPage.find_last(fileobj, self.serial)
if page is None:
raise OggSpeexHeaderError
self.length = page.position / float(self.sample_rate)
def pprint(self):
return u"Ogg Speex, %.2f seconds" % self.length
class OggSpeexVComment(VCommentDict):
"""Speex comments embedded in an Ogg bitstream."""
def __init__(self, fileobj, info):
pages = []
complete = False
while not complete:
page = OggPage(fileobj)
if page.serial == info.serial:
pages.append(page)
complete = page.complete or (len(page.packets) > 1)
data = OggPage.to_packets(pages)[0]
super(OggSpeexVComment, self).__init__(data, framing=False)
self._padding = len(data) - self._size
def _inject(self, fileobj, padding_func):
"""Write tag data into the Speex comment packet/page."""
fileobj.seek(0)
# Find the first header page, with the stream info.
# Use it to get the serial number.
page = OggPage(fileobj)
while not page.packets[0].startswith(b"Speex "):
page = OggPage(fileobj)
# Look for the next page with that serial number, it'll start
# the comment packet.
serial = page.serial
page = OggPage(fileobj)
while page.serial != serial:
page = OggPage(fileobj)
# Then find all the pages with the comment packet.
old_pages = [page]
while not (old_pages[-1].complete or len(old_pages[-1].packets) > 1):
page = OggPage(fileobj)
if page.serial == old_pages[0].serial:
old_pages.append(page)
packets = OggPage.to_packets(old_pages, strict=False)
content_size = get_size(fileobj) - len(packets[0]) # approx
vcomment_data = self.write(framing=False)
padding_left = len(packets[0]) - len(vcomment_data)
info = PaddingInfo(padding_left, content_size)
new_padding = info._get_padding(padding_func)
# Set the new comment packet.
packets[0] = vcomment_data + b"\x00" * new_padding
new_pages = OggPage._from_packets_try_preserve(packets, old_pages)
OggPage.replace(fileobj, old_pages, new_pages)
class OggSpeex(OggFileType):
"""OggSpeex(filething)
An Ogg Speex file.
Arguments:
filething (filething)
Attributes:
info (`OggSpeexInfo`)
tags (`mutagen._vorbis.VCommentDict`)
"""
_Info = OggSpeexInfo
_Tags = OggSpeexVComment
_Error = OggSpeexHeaderError
_mimes = ["audio/x-speex"]
info = None
tags = None
@staticmethod
def score(filename, fileobj, header):
return (header.startswith(b"OggS") * (b"Speex " in header))
Open = OggSpeex
@convert_error(IOError, error)
@loadfile(method=False, writable=True)
def delete(filething):
""" delete(filething)
Arguments:
filething (filething)
Raises:
mutagen.MutagenError
Remove tags from a file.
"""
t = OggSpeex(filething)
filething.fileobj.seek(0)
t.delete(filething)
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