fedf26bf3e
Rework FFmpeg player and add FFmpegOpusAudio I have extracted some of the base FFmpeg source code into its own base class and reimplemented the PCM and the new Opus variants. Support avconv probing Also fix a few things Update `__all__` Fix the bugs Rework probe functions and add factory function Probing involves subprocess so it has been reworked into an async factory function. Add docs + a few tweaks * Removed unnecessary read() and is_opus() functions from FFmpegAudio * Clear self._stdout in cleanup() * Add 20 second process communication timeout to probe functions * Capped probe function bitrate values at 512 Change AudioPlayer to use more accurate, monotonic time.perf_counter() Add lazy opus loading The library now no longer loads libopus on import, only on opus.Encoder creation or manually. Fix review nits
97 lines
3.0 KiB
Python
97 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
The MIT License (MIT)
|
|
|
|
Copyright (c) 2015-2019 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)
|
|
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''
|