mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-05 02:43:37 +00:00
300 lines
11 KiB
Python
300 lines
11 KiB
Python
|
# -*- coding: utf-8 -*-
|
||
|
# enzyme - Video metadata parser
|
||
|
# Copyright 2011-2012 Antoine Bertin <diaoulael@gmail.com>
|
||
|
# Copyright 2003-2006 Thomas Schueppel <stain@acm.org>
|
||
|
# Copyright 2003-2006 Dirk Meyer <dischi@freevo.org>
|
||
|
#
|
||
|
# This file is part of enzyme.
|
||
|
#
|
||
|
# enzyme is free software; you can redistribute it and/or modify it under
|
||
|
# the terms of the GNU General Public License as published by
|
||
|
# the Free Software Foundation; either version 3 of the License, or
|
||
|
# (at your option) any later version.
|
||
|
#
|
||
|
# enzyme is distributed in the hope that it will be useful,
|
||
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
# GNU General Public License for more details.
|
||
|
#
|
||
|
# You should have received a copy of the GNU General Public License
|
||
|
# along with enzyme. If not, see <http://www.gnu.org/licenses/>.
|
||
|
__all__ = ['Parser']
|
||
|
|
||
|
import struct
|
||
|
import re
|
||
|
import stat
|
||
|
import os
|
||
|
import logging
|
||
|
from exceptions import ParseError
|
||
|
import core
|
||
|
|
||
|
# get logging object
|
||
|
log = logging.getLogger(__name__)
|
||
|
|
||
|
PACKET_TYPE_HEADER = 0x01
|
||
|
PACKED_TYPE_METADATA = 0x03
|
||
|
PACKED_TYPE_SETUP = 0x05
|
||
|
PACKET_TYPE_BITS = 0x07
|
||
|
PACKET_IS_SYNCPOINT = 0x08
|
||
|
|
||
|
#VORBIS_VIDEO_PACKET_INFO = 'video'
|
||
|
|
||
|
STREAM_HEADER_VIDEO = '<4sIQQIIHII'
|
||
|
STREAM_HEADER_AUDIO = '<4sIQQIIHHHI'
|
||
|
|
||
|
VORBISCOMMENT = { 'TITLE': 'title',
|
||
|
'ALBUM': 'album',
|
||
|
'ARTIST': 'artist',
|
||
|
'COMMENT': 'comment',
|
||
|
'ENCODER': 'encoder',
|
||
|
'TRACKNUMBER': 'trackno',
|
||
|
'LANGUAGE': 'language',
|
||
|
'GENRE': 'genre',
|
||
|
}
|
||
|
|
||
|
# FIXME: check VORBISCOMMENT date and convert to timestamp
|
||
|
# Deactived tag: 'DATE': 'date',
|
||
|
|
||
|
MAXITERATIONS = 30
|
||
|
|
||
|
class Ogm(core.AVContainer):
|
||
|
|
||
|
table_mapping = { 'VORBISCOMMENT' : VORBISCOMMENT }
|
||
|
|
||
|
def __init__(self, file):
|
||
|
core.AVContainer.__init__(self)
|
||
|
self.samplerate = 1
|
||
|
self.all_streams = [] # used to add meta data to streams
|
||
|
self.all_header = []
|
||
|
|
||
|
for i in range(MAXITERATIONS):
|
||
|
granule, nextlen = self._parseOGGS(file)
|
||
|
if granule == None:
|
||
|
if i == 0:
|
||
|
# oops, bad file
|
||
|
raise ParseError()
|
||
|
break
|
||
|
elif granule > 0:
|
||
|
# ok, file started
|
||
|
break
|
||
|
|
||
|
# seek to the end of the stream, to avoid scanning the whole file
|
||
|
if (os.stat(file.name)[stat.ST_SIZE] > 50000):
|
||
|
file.seek(os.stat(file.name)[stat.ST_SIZE] - 49000)
|
||
|
|
||
|
# read the rest of the file into a buffer
|
||
|
h = file.read()
|
||
|
|
||
|
# find last OggS to get length info
|
||
|
if len(h) > 200:
|
||
|
idx = h.find('OggS')
|
||
|
pos = -49000 + idx
|
||
|
if idx:
|
||
|
file.seek(os.stat(file.name)[stat.ST_SIZE] + pos)
|
||
|
while 1:
|
||
|
granule, nextlen = self._parseOGGS(file)
|
||
|
if not nextlen:
|
||
|
break
|
||
|
|
||
|
# Copy metadata to the streams
|
||
|
if len(self.all_header) == len(self.all_streams):
|
||
|
for i in range(len(self.all_header)):
|
||
|
|
||
|
# get meta info
|
||
|
for key in self.all_streams[i].keys():
|
||
|
if self.all_header[i].has_key(key):
|
||
|
self.all_streams[i][key] = self.all_header[i][key]
|
||
|
del self.all_header[i][key]
|
||
|
if self.all_header[i].has_key(key.upper()):
|
||
|
asi = self.all_header[i][key.upper()]
|
||
|
self.all_streams[i][key] = asi
|
||
|
del self.all_header[i][key.upper()]
|
||
|
|
||
|
# Chapter parser
|
||
|
if self.all_header[i].has_key('CHAPTER01') and \
|
||
|
not self.chapters:
|
||
|
while 1:
|
||
|
s = 'CHAPTER%02d' % (len(self.chapters) + 1)
|
||
|
if self.all_header[i].has_key(s) and \
|
||
|
self.all_header[i].has_key(s + 'NAME'):
|
||
|
pos = self.all_header[i][s]
|
||
|
try:
|
||
|
pos = int(pos)
|
||
|
except ValueError:
|
||
|
new_pos = 0
|
||
|
for v in pos.split(':'):
|
||
|
new_pos = new_pos * 60 + float(v)
|
||
|
pos = int(new_pos)
|
||
|
|
||
|
c = self.all_header[i][s + 'NAME']
|
||
|
c = core.Chapter(c, pos)
|
||
|
del self.all_header[i][s + 'NAME']
|
||
|
del self.all_header[i][s]
|
||
|
self.chapters.append(c)
|
||
|
else:
|
||
|
break
|
||
|
|
||
|
# If there are no video streams in this ogg container, it
|
||
|
# must be an audio file. Raise an exception to cause the
|
||
|
# factory to fall back to audio.ogg.
|
||
|
if len(self.video) == 0:
|
||
|
raise ParseError
|
||
|
|
||
|
# Copy Metadata from tables into the main set of attributes
|
||
|
for header in self.all_header:
|
||
|
self._appendtable('VORBISCOMMENT', header)
|
||
|
|
||
|
|
||
|
def _parseOGGS(self, file):
|
||
|
h = file.read(27)
|
||
|
if len(h) == 0:
|
||
|
# Regular File end
|
||
|
return None, None
|
||
|
elif len(h) < 27:
|
||
|
log.debug(u'%d Bytes of Garbage found after End.' % len(h))
|
||
|
return None, None
|
||
|
if h[:4] != "OggS":
|
||
|
log.debug(u'Invalid Ogg')
|
||
|
raise ParseError()
|
||
|
|
||
|
version = ord(h[4])
|
||
|
if version != 0:
|
||
|
log.debug(u'Unsupported OGG/OGM Version %d' % version)
|
||
|
return None, None
|
||
|
|
||
|
head = struct.unpack('<BQIIIB', h[5:])
|
||
|
headertype, granulepos, serial, pageseqno, checksum, \
|
||
|
pageSegCount = head
|
||
|
|
||
|
self.mime = 'application/ogm'
|
||
|
self.type = 'OGG Media'
|
||
|
tab = file.read(pageSegCount)
|
||
|
nextlen = 0
|
||
|
for i in range(len(tab)):
|
||
|
nextlen += ord(tab[i])
|
||
|
else:
|
||
|
h = file.read(1)
|
||
|
packettype = ord(h[0]) & PACKET_TYPE_BITS
|
||
|
if packettype == PACKET_TYPE_HEADER:
|
||
|
h += file.read(nextlen - 1)
|
||
|
self._parseHeader(h, granulepos)
|
||
|
elif packettype == PACKED_TYPE_METADATA:
|
||
|
h += file.read(nextlen - 1)
|
||
|
self._parseMeta(h)
|
||
|
else:
|
||
|
file.seek(nextlen - 1, 1)
|
||
|
if len(self.all_streams) > serial:
|
||
|
stream = self.all_streams[serial]
|
||
|
if hasattr(stream, 'samplerate') and \
|
||
|
stream.samplerate:
|
||
|
stream.length = granulepos / stream.samplerate
|
||
|
elif hasattr(stream, 'bitrate') and \
|
||
|
stream.bitrate:
|
||
|
stream.length = granulepos / stream.bitrate
|
||
|
|
||
|
return granulepos, nextlen + 27 + pageSegCount
|
||
|
|
||
|
|
||
|
def _parseMeta(self, h):
|
||
|
flags = ord(h[0])
|
||
|
headerlen = len(h)
|
||
|
if headerlen >= 7 and h[1:7] == 'vorbis':
|
||
|
header = {}
|
||
|
nextlen, self.encoder = self._extractHeaderString(h[7:])
|
||
|
numItems = struct.unpack('<I', h[7 + nextlen:7 + nextlen + 4])[0]
|
||
|
start = 7 + 4 + nextlen
|
||
|
for _ in range(numItems):
|
||
|
(nextlen, s) = self._extractHeaderString(h[start:])
|
||
|
start += nextlen
|
||
|
if s:
|
||
|
a = re.split('=', s)
|
||
|
header[(a[0]).upper()] = a[1]
|
||
|
# Put Header fields into info fields
|
||
|
self.type = 'OGG Vorbis'
|
||
|
self.subtype = ''
|
||
|
self.all_header.append(header)
|
||
|
|
||
|
|
||
|
def _parseHeader(self, header, granule):
|
||
|
headerlen = len(header)
|
||
|
flags = ord(header[0])
|
||
|
|
||
|
if headerlen >= 30 and header[1:7] == 'vorbis':
|
||
|
ai = core.AudioStream()
|
||
|
ai.version, ai.channels, ai.samplerate, bitrate_max, ai.bitrate, \
|
||
|
bitrate_min, blocksize, framing = \
|
||
|
struct.unpack('<IBIiiiBB', header[7:7 + 23])
|
||
|
ai.codec = 'Vorbis'
|
||
|
#ai.granule = granule
|
||
|
#ai.length = granule / ai.samplerate
|
||
|
self.audio.append(ai)
|
||
|
self.all_streams.append(ai)
|
||
|
|
||
|
elif headerlen >= 7 and header[1:7] == 'theora':
|
||
|
# Theora Header
|
||
|
# XXX Finish Me
|
||
|
vi = core.VideoStream()
|
||
|
vi.codec = 'theora'
|
||
|
self.video.append(vi)
|
||
|
self.all_streams.append(vi)
|
||
|
|
||
|
elif headerlen >= 142 and \
|
||
|
header[1:36] == 'Direct Show Samples embedded in Ogg':
|
||
|
# Old Directshow format
|
||
|
# XXX Finish Me
|
||
|
vi = core.VideoStream()
|
||
|
vi.codec = 'dshow'
|
||
|
self.video.append(vi)
|
||
|
self.all_streams.append(vi)
|
||
|
|
||
|
elif flags & PACKET_TYPE_BITS == PACKET_TYPE_HEADER and \
|
||
|
headerlen >= struct.calcsize(STREAM_HEADER_VIDEO) + 1:
|
||
|
# New Directshow Format
|
||
|
htype = header[1:9]
|
||
|
|
||
|
if htype[:5] == 'video':
|
||
|
sh = header[9:struct.calcsize(STREAM_HEADER_VIDEO) + 9]
|
||
|
streamheader = struct.unpack(STREAM_HEADER_VIDEO, sh)
|
||
|
vi = core.VideoStream()
|
||
|
(type, ssize, timeunit, samplerate, vi.length, buffersize, \
|
||
|
vi.bitrate, vi.width, vi.height) = streamheader
|
||
|
|
||
|
vi.width /= 65536
|
||
|
vi.height /= 65536
|
||
|
# XXX length, bitrate are very wrong
|
||
|
vi.codec = type
|
||
|
vi.fps = 10000000 / timeunit
|
||
|
self.video.append(vi)
|
||
|
self.all_streams.append(vi)
|
||
|
|
||
|
elif htype[:5] == 'audio':
|
||
|
sha = header[9:struct.calcsize(STREAM_HEADER_AUDIO) + 9]
|
||
|
streamheader = struct.unpack(STREAM_HEADER_AUDIO, sha)
|
||
|
ai = core.AudioStream()
|
||
|
(type, ssize, timeunit, ai.samplerate, ai.length, buffersize, \
|
||
|
ai.bitrate, ai.channels, bloc, ai.bitrate) = streamheader
|
||
|
self.samplerate = ai.samplerate
|
||
|
log.debug(u'Samplerate %d' % self.samplerate)
|
||
|
self.audio.append(ai)
|
||
|
self.all_streams.append(ai)
|
||
|
|
||
|
elif htype[:4] == 'text':
|
||
|
subtitle = core.Subtitle()
|
||
|
# FIXME: add more info
|
||
|
self.subtitles.append(subtitle)
|
||
|
self.all_streams.append(subtitle)
|
||
|
|
||
|
else:
|
||
|
log.debug(u'Unknown Header')
|
||
|
|
||
|
|
||
|
def _extractHeaderString(self, header):
|
||
|
len = struct.unpack('<I', header[:4])[0]
|
||
|
try:
|
||
|
return (len + 4, unicode(header[4:4 + len], 'utf-8'))
|
||
|
except (KeyError, IndexError, UnicodeDecodeError):
|
||
|
return (len + 4, None)
|
||
|
|
||
|
|
||
|
Parser = Ogm
|