mirror of https://github.com/sgoudham/Enso-Bot.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
3.1 KiB
Python
99 lines
3.1 KiB
Python
5 years ago
|
# -*- coding: utf-8 -*-
|
||
|
|
|
||
|
|
"""
|
||
|
|
The MIT License (MIT)
|
||
|
|
|
||
|
|
Copyright (c) 2015-2020 Rapptz
|
||
|
|
|
||
|
|
Permission is hereby granted, free of charge, to any person obtaining a
|
||
|
|
copy of this software and associated documentation files (the "Software"),
|
||
|
|
to deal in the Software without restriction, including without limitation
|
||
|
|
the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||
|
|
and/or sell copies of the Software, and to permit persons to whom the
|
||
|
|
Software is furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
The above copyright notice and this permission notice shall be included in
|
||
|
|
all copies or substantial portions of the Software.
|
||
|
|
|
||
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
||
|
|
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||
|
|
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||
|
|
DEALINGS IN THE SOFTWARE.
|
||
|
|
"""
|
||
|
|
|
||
|
|
import struct
|
||
|
|
|
||
|
|
from .errors import DiscordException
|
||
|
|
|
||
|
|
class OggError(DiscordException):
|
||
|
|
"""An exception that is thrown for Ogg stream parsing errors."""
|
||
|
|
pass
|
||
|
|
|
||
|
|
# https://tools.ietf.org/html/rfc3533
|
||
|
|
# https://tools.ietf.org/html/rfc7845
|
||
|
|
|
||
|
|
class OggPage:
|
||
|
|
_header = struct.Struct('<xBQIIIB')
|
||
|
|
|
||
|
|
def __init__(self, stream):
|
||
|
|
try:
|
||
|
|
header = stream.read(struct.calcsize(self._header.format))
|
||
|
|
|
||
|
|
self.flag, self.gran_pos, self.serial, \
|
||
|
|
self.pagenum, self.crc, self.segnum = self._header.unpack(header)
|
||
|
|
|
||
|
|
self.segtable = stream.read(self.segnum)
|
||
|
|
bodylen = sum(struct.unpack('B'*self.segnum, self.segtable))
|
||
|
|
self.data = stream.read(bodylen)
|
||
|
|
except Exception:
|
||
|
|
raise OggError('bad data stream') from None
|
||
|
|
|
||
|
|
def iter_packets(self):
|
||
|
|
packetlen = offset = 0
|
||
|
|
partial = True
|
||
|
|
|
||
|
|
for seg in self.segtable:
|
||
|
|
if seg == 255:
|
||
|
|
packetlen += 255
|
||
|
|
partial = True
|
||
|
|
else:
|
||
|
|
packetlen += seg
|
||
|
|
yield self.data[offset:offset+packetlen], True
|
||
|
|
offset += packetlen
|
||
|
|
packetlen = 0
|
||
|
|
partial = False
|
||
|
|
|
||
|
|
if partial:
|
||
|
|
yield self.data[offset:], False
|
||
|
|
|
||
|
|
class OggStream:
|
||
|
|
def __init__(self, stream):
|
||
|
|
self.stream = stream
|
||
|
|
|
||
|
|
def _next_page(self):
|
||
|
|
head = self.stream.read(4)
|
||
|
|
if head == b'OggS':
|
||
|
|
return OggPage(self.stream)
|
||
|
|
elif not head:
|
||
|
|
return None
|
||
|
|
else:
|
||
|
|
raise OggError('invalid header magic')
|
||
|
|
|
||
|
|
def _iter_pages(self):
|
||
|
|
page = self._next_page()
|
||
|
|
while page:
|
||
|
|
yield page
|
||
|
|
page = self._next_page()
|
||
|
|
|
||
|
|
def iter_packets(self):
|
||
|
|
partial = b''
|
||
|
|
for page in self._iter_pages():
|
||
|
|
for data, complete in page.iter_packets():
|
||
|
|
partial += data
|
||
|
|
if complete:
|
||
|
|
yield partial
|
||
|
|
partial = b''
|