mirror of
https://github.com/moparisthebest/SickRage
synced 2024-11-14 13:25:11 -05:00
567 lines
20 KiB
Python
567 lines
20 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 os
|
||
|
|
import struct
|
||
|
|
import string
|
||
|
|
import logging
|
||
|
|
import time
|
||
|
|
from exceptions import ParseError
|
||
|
|
import core
|
||
|
|
|
||
|
|
# get logging object
|
||
|
|
log = logging.getLogger(__name__)
|
||
|
|
|
||
|
|
# List of tags
|
||
|
|
# http://kibus1.narod.ru/frames_eng.htm?sof/abcavi/infotags.htm
|
||
|
|
# http://www.divx-digest.com/software/avitags_dll.html
|
||
|
|
# File Format: google for odmlff2.pdf
|
||
|
|
|
||
|
|
AVIINFO = {
|
||
|
|
'INAM': 'title',
|
||
|
|
'IART': 'artist',
|
||
|
|
'IPRD': 'product',
|
||
|
|
'ISFT': 'software',
|
||
|
|
'ICMT': 'comment',
|
||
|
|
'ILNG': 'language',
|
||
|
|
'IKEY': 'keywords',
|
||
|
|
'IPRT': 'trackno',
|
||
|
|
'IFRM': 'trackof',
|
||
|
|
'IPRO': 'producer',
|
||
|
|
'IWRI': 'writer',
|
||
|
|
'IGNR': 'genre',
|
||
|
|
'ICOP': 'copyright'
|
||
|
|
}
|
||
|
|
|
||
|
|
# Taken from libavcodec/mpeg4data.h (pixel_aspect struct)
|
||
|
|
PIXEL_ASPECT = {
|
||
|
|
1: (1, 1),
|
||
|
|
2: (12, 11),
|
||
|
|
3: (10, 11),
|
||
|
|
4: (16, 11),
|
||
|
|
5: (40, 33)
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
class Riff(core.AVContainer):
|
||
|
|
"""
|
||
|
|
AVI parser also parsing metadata like title, languages, etc.
|
||
|
|
"""
|
||
|
|
table_mapping = { 'AVIINFO' : AVIINFO }
|
||
|
|
|
||
|
|
def __init__(self, file):
|
||
|
|
core.AVContainer.__init__(self)
|
||
|
|
# read the header
|
||
|
|
h = file.read(12)
|
||
|
|
if h[:4] != "RIFF" and h[:4] != 'SDSS':
|
||
|
|
raise ParseError()
|
||
|
|
|
||
|
|
self.has_idx = False
|
||
|
|
self.header = {}
|
||
|
|
self.junkStart = None
|
||
|
|
self.infoStart = None
|
||
|
|
self.type = h[8:12]
|
||
|
|
if self.type == 'AVI ':
|
||
|
|
self.mime = 'video/avi'
|
||
|
|
elif self.type == 'WAVE':
|
||
|
|
self.mime = 'audio/wav'
|
||
|
|
try:
|
||
|
|
while self._parseRIFFChunk(file):
|
||
|
|
pass
|
||
|
|
except IOError:
|
||
|
|
log.exception(u'error in file, stop parsing')
|
||
|
|
|
||
|
|
self._find_subtitles(file.name)
|
||
|
|
|
||
|
|
if not self.has_idx and isinstance(self, core.AVContainer):
|
||
|
|
log.debug(u'WARNING: avi has no index')
|
||
|
|
self._set('corrupt', True)
|
||
|
|
|
||
|
|
|
||
|
|
def _find_subtitles(self, filename):
|
||
|
|
"""
|
||
|
|
Search for subtitle files. Right now only VobSub is supported
|
||
|
|
"""
|
||
|
|
base = os.path.splitext(filename)[0]
|
||
|
|
if os.path.isfile(base + '.idx') and \
|
||
|
|
(os.path.isfile(base + '.sub') or os.path.isfile(base + '.rar')):
|
||
|
|
file = open(base + '.idx')
|
||
|
|
if file.readline().find('VobSub index file') > 0:
|
||
|
|
for line in file.readlines():
|
||
|
|
if line.find('id') == 0:
|
||
|
|
sub = core.Subtitle()
|
||
|
|
sub.language = line[4:6]
|
||
|
|
sub.trackno = base + '.idx' # Maybe not?
|
||
|
|
self.subtitles.append(sub)
|
||
|
|
file.close()
|
||
|
|
|
||
|
|
|
||
|
|
def _parseAVIH(self, t):
|
||
|
|
retval = {}
|
||
|
|
v = struct.unpack('<IIIIIIIIIIIIII', t[0:56])
|
||
|
|
(retval['dwMicroSecPerFrame'],
|
||
|
|
retval['dwMaxBytesPerSec'],
|
||
|
|
retval['dwPaddingGranularity'],
|
||
|
|
retval['dwFlags'],
|
||
|
|
retval['dwTotalFrames'],
|
||
|
|
retval['dwInitialFrames'],
|
||
|
|
retval['dwStreams'],
|
||
|
|
retval['dwSuggestedBufferSize'],
|
||
|
|
retval['dwWidth'],
|
||
|
|
retval['dwHeight'],
|
||
|
|
retval['dwScale'],
|
||
|
|
retval['dwRate'],
|
||
|
|
retval['dwStart'],
|
||
|
|
retval['dwLength']) = v
|
||
|
|
if retval['dwMicroSecPerFrame'] == 0:
|
||
|
|
log.warning(u'ERROR: Corrupt AVI')
|
||
|
|
raise ParseError()
|
||
|
|
|
||
|
|
return retval
|
||
|
|
|
||
|
|
|
||
|
|
def _parseSTRH(self, t):
|
||
|
|
retval = {}
|
||
|
|
retval['fccType'] = t[0:4]
|
||
|
|
log.debug(u'_parseSTRH(%r) : %d bytes' % (retval['fccType'], len(t)))
|
||
|
|
if retval['fccType'] != 'auds':
|
||
|
|
retval['fccHandler'] = t[4:8]
|
||
|
|
v = struct.unpack('<IHHIIIIIIIII', t[8:52])
|
||
|
|
(retval['dwFlags'],
|
||
|
|
retval['wPriority'],
|
||
|
|
retval['wLanguage'],
|
||
|
|
retval['dwInitialFrames'],
|
||
|
|
retval['dwScale'],
|
||
|
|
retval['dwRate'],
|
||
|
|
retval['dwStart'],
|
||
|
|
retval['dwLength'],
|
||
|
|
retval['dwSuggestedBufferSize'],
|
||
|
|
retval['dwQuality'],
|
||
|
|
retval['dwSampleSize'],
|
||
|
|
retval['rcFrame']) = v
|
||
|
|
else:
|
||
|
|
try:
|
||
|
|
v = struct.unpack('<IHHIIIIIIIII', t[8:52])
|
||
|
|
(retval['dwFlags'],
|
||
|
|
retval['wPriority'],
|
||
|
|
retval['wLanguage'],
|
||
|
|
retval['dwInitialFrames'],
|
||
|
|
retval['dwScale'],
|
||
|
|
retval['dwRate'],
|
||
|
|
retval['dwStart'],
|
||
|
|
retval['dwLength'],
|
||
|
|
retval['dwSuggestedBufferSize'],
|
||
|
|
retval['dwQuality'],
|
||
|
|
retval['dwSampleSize'],
|
||
|
|
retval['rcFrame']) = v
|
||
|
|
self.delay = float(retval['dwStart']) / \
|
||
|
|
(float(retval['dwRate']) / retval['dwScale'])
|
||
|
|
except (KeyError, IndexError, ValueError, ZeroDivisionError):
|
||
|
|
pass
|
||
|
|
|
||
|
|
return retval
|
||
|
|
|
||
|
|
|
||
|
|
def _parseSTRF(self, t, strh):
|
||
|
|
fccType = strh['fccType']
|
||
|
|
retval = {}
|
||
|
|
if fccType == 'auds':
|
||
|
|
v = struct.unpack('<HHHHHH', t[0:12])
|
||
|
|
(retval['wFormatTag'],
|
||
|
|
retval['nChannels'],
|
||
|
|
retval['nSamplesPerSec'],
|
||
|
|
retval['nAvgBytesPerSec'],
|
||
|
|
retval['nBlockAlign'],
|
||
|
|
retval['nBitsPerSample'],
|
||
|
|
) = v
|
||
|
|
ai = core.AudioStream()
|
||
|
|
ai.samplerate = retval['nSamplesPerSec']
|
||
|
|
ai.channels = retval['nChannels']
|
||
|
|
# FIXME: Bitrate calculation is completely wrong.
|
||
|
|
#ai.samplebits = retval['nBitsPerSample']
|
||
|
|
#ai.bitrate = retval['nAvgBytesPerSec'] * 8
|
||
|
|
|
||
|
|
# TODO: set code if possible
|
||
|
|
# http://www.stats.uwa.edu.au/Internal/Specs/DXALL/FileSpec/\
|
||
|
|
# Languages
|
||
|
|
# ai.language = strh['wLanguage']
|
||
|
|
ai.codec = retval['wFormatTag']
|
||
|
|
self.audio.append(ai)
|
||
|
|
elif fccType == 'vids':
|
||
|
|
v = struct.unpack('<IIIHH', t[0:16])
|
||
|
|
(retval['biSize'],
|
||
|
|
retval['biWidth'],
|
||
|
|
retval['biHeight'],
|
||
|
|
retval['biPlanes'],
|
||
|
|
retval['biBitCount']) = v
|
||
|
|
v = struct.unpack('IIIII', t[20:40])
|
||
|
|
(retval['biSizeImage'],
|
||
|
|
retval['biXPelsPerMeter'],
|
||
|
|
retval['biYPelsPerMeter'],
|
||
|
|
retval['biClrUsed'],
|
||
|
|
retval['biClrImportant']) = v
|
||
|
|
vi = core.VideoStream()
|
||
|
|
vi.codec = t[16:20]
|
||
|
|
vi.width = retval['biWidth']
|
||
|
|
vi.height = retval['biHeight']
|
||
|
|
# FIXME: Bitrate calculation is completely wrong.
|
||
|
|
#vi.bitrate = strh['dwRate']
|
||
|
|
vi.fps = float(strh['dwRate']) / strh['dwScale']
|
||
|
|
vi.length = strh['dwLength'] / vi.fps
|
||
|
|
self.video.append(vi)
|
||
|
|
return retval
|
||
|
|
|
||
|
|
|
||
|
|
def _parseSTRL(self, t):
|
||
|
|
retval = {}
|
||
|
|
size = len(t)
|
||
|
|
i = 0
|
||
|
|
|
||
|
|
while i < len(t) - 8:
|
||
|
|
key = t[i:i + 4]
|
||
|
|
sz = struct.unpack('<I', t[i + 4:i + 8])[0]
|
||
|
|
i += 8
|
||
|
|
value = t[i:]
|
||
|
|
|
||
|
|
if key == 'strh':
|
||
|
|
retval[key] = self._parseSTRH(value)
|
||
|
|
elif key == 'strf':
|
||
|
|
retval[key] = self._parseSTRF(value, retval['strh'])
|
||
|
|
else:
|
||
|
|
log.debug(u'_parseSTRL: unsupported stream tag %r', key)
|
||
|
|
|
||
|
|
i += sz
|
||
|
|
|
||
|
|
return retval, i
|
||
|
|
|
||
|
|
|
||
|
|
def _parseODML(self, t):
|
||
|
|
retval = {}
|
||
|
|
size = len(t)
|
||
|
|
i = 0
|
||
|
|
key = t[i:i + 4]
|
||
|
|
sz = struct.unpack('<I', t[i + 4:i + 8])[0]
|
||
|
|
i += 8
|
||
|
|
value = t[i:]
|
||
|
|
if key != 'dmlh':
|
||
|
|
log.debug(u'_parseODML: Error')
|
||
|
|
|
||
|
|
i += sz - 8
|
||
|
|
return (retval, i)
|
||
|
|
|
||
|
|
|
||
|
|
def _parseVPRP(self, t):
|
||
|
|
retval = {}
|
||
|
|
v = struct.unpack('<IIIIIIIIII', t[:4 * 10])
|
||
|
|
|
||
|
|
(retval['VideoFormat'],
|
||
|
|
retval['VideoStandard'],
|
||
|
|
retval['RefreshRate'],
|
||
|
|
retval['HTotalIn'],
|
||
|
|
retval['VTotalIn'],
|
||
|
|
retval['FrameAspectRatio'],
|
||
|
|
retval['wPixel'],
|
||
|
|
retval['hPixel']) = v[1:-1]
|
||
|
|
|
||
|
|
# I need an avi with more informations
|
||
|
|
# enum {FORMAT_UNKNOWN, FORMAT_PAL_SQUARE, FORMAT_PAL_CCIR_601,
|
||
|
|
# FORMAT_NTSC_SQUARE, FORMAT_NTSC_CCIR_601,...} VIDEO_FORMAT;
|
||
|
|
# enum {STANDARD_UNKNOWN, STANDARD_PAL, STANDARD_NTSC, STANDARD_SECAM}
|
||
|
|
# VIDEO_STANDARD;
|
||
|
|
#
|
||
|
|
r = retval['FrameAspectRatio']
|
||
|
|
r = float(r >> 16) / (r & 0xFFFF)
|
||
|
|
retval['FrameAspectRatio'] = r
|
||
|
|
if self.video:
|
||
|
|
map(lambda v: setattr(v, 'aspect', r), self.video)
|
||
|
|
return (retval, v[0])
|
||
|
|
|
||
|
|
|
||
|
|
def _parseLISTmovi(self, size, file):
|
||
|
|
"""
|
||
|
|
Digs into movi list, looking for a Video Object Layer header in an
|
||
|
|
mpeg4 stream in order to determine aspect ratio.
|
||
|
|
"""
|
||
|
|
i = 0
|
||
|
|
n_dc = 0
|
||
|
|
done = False
|
||
|
|
# If the VOL header doesn't appear within 5MB or 5 video chunks,
|
||
|
|
# give up. The 5MB limit is not likely to apply except in
|
||
|
|
# pathological cases.
|
||
|
|
while i < min(1024 * 1024 * 5, size - 8) and n_dc < 5:
|
||
|
|
data = file.read(8)
|
||
|
|
if ord(data[0]) == 0:
|
||
|
|
# Eat leading nulls.
|
||
|
|
data = data[1:] + file.read(1)
|
||
|
|
i += 1
|
||
|
|
|
||
|
|
key, sz = struct.unpack('<4sI', data)
|
||
|
|
if key[2:] != 'dc' or sz > 1024 * 500:
|
||
|
|
# This chunk is not video or is unusually big (> 500KB);
|
||
|
|
# skip it.
|
||
|
|
file.seek(sz, 1)
|
||
|
|
i += 8 + sz
|
||
|
|
continue
|
||
|
|
|
||
|
|
n_dc += 1
|
||
|
|
# Read video chunk into memory
|
||
|
|
data = file.read(sz)
|
||
|
|
|
||
|
|
#for p in range(0,min(80, sz)):
|
||
|
|
# print "%02x " % ord(data[p]),
|
||
|
|
#print "\n\n"
|
||
|
|
|
||
|
|
# Look through the picture header for VOL startcode. The basic
|
||
|
|
# logic for this is taken from libavcodec, h263.c
|
||
|
|
pos = 0
|
||
|
|
startcode = 0xff
|
||
|
|
def bits(v, o, n):
|
||
|
|
# Returns n bits in v, offset o bits.
|
||
|
|
return (v & 2 ** n - 1 << (64 - n - o)) >> 64 - n - o
|
||
|
|
|
||
|
|
while pos < sz:
|
||
|
|
startcode = ((startcode << 8) | ord(data[pos])) & 0xffffffff
|
||
|
|
pos += 1
|
||
|
|
if startcode & 0xFFFFFF00 != 0x100:
|
||
|
|
# No startcode found yet
|
||
|
|
continue
|
||
|
|
|
||
|
|
if startcode >= 0x120 and startcode <= 0x12F:
|
||
|
|
# We have the VOL startcode. Pull 64 bits of it and treat
|
||
|
|
# as a bitstream
|
||
|
|
v = struct.unpack(">Q", data[pos : pos + 8])[0]
|
||
|
|
offset = 10
|
||
|
|
if bits(v, 9, 1):
|
||
|
|
# is_ol_id, skip over vo_ver_id and vo_priority
|
||
|
|
offset += 7
|
||
|
|
ar_info = bits(v, offset, 4)
|
||
|
|
if ar_info == 15:
|
||
|
|
# Extended aspect
|
||
|
|
num = bits(v, offset + 4, 8)
|
||
|
|
den = bits(v, offset + 12, 8)
|
||
|
|
else:
|
||
|
|
# A standard pixel aspect
|
||
|
|
num, den = PIXEL_ASPECT.get(ar_info, (0, 0))
|
||
|
|
|
||
|
|
# num/den indicates pixel aspect; convert to video aspect,
|
||
|
|
# so we need frame width and height.
|
||
|
|
if 0 not in [num, den]:
|
||
|
|
width, height = self.video[-1].width, self.video[-1].height
|
||
|
|
self.video[-1].aspect = num / float(den) * width / height
|
||
|
|
|
||
|
|
done = True
|
||
|
|
break
|
||
|
|
|
||
|
|
startcode = 0xff
|
||
|
|
|
||
|
|
i += 8 + len(data)
|
||
|
|
|
||
|
|
if done:
|
||
|
|
# We have the aspect, no need to continue parsing the movi
|
||
|
|
# list, so break out of the loop.
|
||
|
|
break
|
||
|
|
|
||
|
|
|
||
|
|
if i < size:
|
||
|
|
# Seek past whatever might be remaining of the movi list.
|
||
|
|
file.seek(size - i, 1)
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
def _parseLIST(self, t):
|
||
|
|
retval = {}
|
||
|
|
i = 0
|
||
|
|
size = len(t)
|
||
|
|
|
||
|
|
while i < size - 8:
|
||
|
|
# skip zero
|
||
|
|
if ord(t[i]) == 0: i += 1
|
||
|
|
key = t[i:i + 4]
|
||
|
|
sz = 0
|
||
|
|
|
||
|
|
if key == 'LIST':
|
||
|
|
sz = struct.unpack('<I', t[i + 4:i + 8])[0]
|
||
|
|
i += 8
|
||
|
|
key = "LIST:" + t[i:i + 4]
|
||
|
|
value = self._parseLIST(t[i:i + sz])
|
||
|
|
if key == 'strl':
|
||
|
|
for k in value.keys():
|
||
|
|
retval[k] = value[k]
|
||
|
|
else:
|
||
|
|
retval[key] = value
|
||
|
|
i += sz
|
||
|
|
elif key == 'avih':
|
||
|
|
sz = struct.unpack('<I', t[i + 4:i + 8])[0]
|
||
|
|
i += 8
|
||
|
|
value = self._parseAVIH(t[i:i + sz])
|
||
|
|
i += sz
|
||
|
|
retval[key] = value
|
||
|
|
elif key == 'strl':
|
||
|
|
i += 4
|
||
|
|
(value, sz) = self._parseSTRL(t[i:])
|
||
|
|
key = value['strh']['fccType']
|
||
|
|
i += sz
|
||
|
|
retval[key] = value
|
||
|
|
elif key == 'odml':
|
||
|
|
i += 4
|
||
|
|
(value, sz) = self._parseODML(t[i:])
|
||
|
|
i += sz
|
||
|
|
elif key == 'vprp':
|
||
|
|
i += 4
|
||
|
|
(value, sz) = self._parseVPRP(t[i:])
|
||
|
|
retval[key] = value
|
||
|
|
i += sz
|
||
|
|
elif key == 'JUNK':
|
||
|
|
sz = struct.unpack('<I', t[i + 4:i + 8])[0]
|
||
|
|
i += sz + 8
|
||
|
|
else:
|
||
|
|
sz = struct.unpack('<I', t[i + 4:i + 8])[0]
|
||
|
|
i += 8
|
||
|
|
# in most cases this is some info stuff
|
||
|
|
if not key in AVIINFO.keys() and key != 'IDIT':
|
||
|
|
log.debug(u'Unknown Key: %r, len: %d' % (key, sz))
|
||
|
|
value = t[i:i + sz]
|
||
|
|
if key == 'ISFT':
|
||
|
|
# product information
|
||
|
|
if value.find('\0') > 0:
|
||
|
|
# works for Casio S500 camera videos
|
||
|
|
value = value[:value.find('\0')]
|
||
|
|
value = value.replace('\0', '').lstrip().rstrip()
|
||
|
|
value = value.replace('\0', '').lstrip().rstrip()
|
||
|
|
if value:
|
||
|
|
retval[key] = value
|
||
|
|
if key in ['IDIT', 'ICRD']:
|
||
|
|
# Timestamp the video was created. Spec says it
|
||
|
|
# should be a format like "Wed Jan 02 02:03:55 1990"
|
||
|
|
# Casio S500 uses "2005/12/24/ 14:11", but I've
|
||
|
|
# also seen "December 24, 2005"
|
||
|
|
specs = ('%a %b %d %H:%M:%S %Y', '%Y/%m/%d/ %H:%M', '%B %d, %Y')
|
||
|
|
for tmspec in specs:
|
||
|
|
try:
|
||
|
|
tm = time.strptime(value, tmspec)
|
||
|
|
# save timestamp as int
|
||
|
|
self.timestamp = int(time.mktime(tm))
|
||
|
|
break
|
||
|
|
except ValueError:
|
||
|
|
pass
|
||
|
|
else:
|
||
|
|
log.debug(u'no support for time format %r', value)
|
||
|
|
i += sz
|
||
|
|
return retval
|
||
|
|
|
||
|
|
|
||
|
|
def _parseRIFFChunk(self, file):
|
||
|
|
h = file.read(8)
|
||
|
|
if len(h) < 8:
|
||
|
|
return False
|
||
|
|
name = h[:4]
|
||
|
|
size = struct.unpack('<I', h[4:8])[0]
|
||
|
|
|
||
|
|
if name == 'LIST':
|
||
|
|
pos = file.tell() - 8
|
||
|
|
key = file.read(4)
|
||
|
|
if key == 'movi' and self.video and not self.video[-1].aspect and \
|
||
|
|
self.video[-1].width and self.video[-1].height and \
|
||
|
|
self.video[-1].format in ['DIVX', 'XVID', 'FMP4']: # any others?
|
||
|
|
# If we don't have the aspect (i.e. it isn't in odml vprp
|
||
|
|
# header), but we do know the video's dimensions, and
|
||
|
|
# we're dealing with an mpeg4 stream, try to get the aspect
|
||
|
|
# from the VOL header in the mpeg4 stream.
|
||
|
|
self._parseLISTmovi(size - 4, file)
|
||
|
|
return True
|
||
|
|
elif size > 80000:
|
||
|
|
log.debug(u'RIFF LIST %r too long to parse: %r bytes' % (key, size))
|
||
|
|
t = file.seek(size - 4, 1)
|
||
|
|
return True
|
||
|
|
elif size < 5:
|
||
|
|
log.debug(u'RIFF LIST %r too short: %r bytes' % (key, size))
|
||
|
|
return True
|
||
|
|
|
||
|
|
t = file.read(size - 4)
|
||
|
|
log.debug(u'parse RIFF LIST %r: %d bytes' % (key, size))
|
||
|
|
value = self._parseLIST(t)
|
||
|
|
self.header[key] = value
|
||
|
|
if key == 'INFO':
|
||
|
|
self.infoStart = pos
|
||
|
|
self._appendtable('AVIINFO', value)
|
||
|
|
elif key == 'MID ':
|
||
|
|
self._appendtable('AVIMID', value)
|
||
|
|
elif key == 'hdrl':
|
||
|
|
# no need to add this info to a table
|
||
|
|
pass
|
||
|
|
else:
|
||
|
|
log.debug(u'Skipping table info %r' % key)
|
||
|
|
|
||
|
|
elif name == 'JUNK':
|
||
|
|
self.junkStart = file.tell() - 8
|
||
|
|
self.junkSize = size
|
||
|
|
file.seek(size, 1)
|
||
|
|
elif name == 'idx1':
|
||
|
|
self.has_idx = True
|
||
|
|
log.debug(u'idx1: %r bytes' % size)
|
||
|
|
# no need to parse this
|
||
|
|
t = file.seek(size, 1)
|
||
|
|
elif name == 'RIFF':
|
||
|
|
log.debug(u'New RIFF chunk, extended avi [%i]' % size)
|
||
|
|
type = file.read(4)
|
||
|
|
if type != 'AVIX':
|
||
|
|
log.debug(u'Second RIFF chunk is %r, not AVIX, skipping', type)
|
||
|
|
file.seek(size - 4, 1)
|
||
|
|
# that's it, no new informations should be in AVIX
|
||
|
|
return False
|
||
|
|
elif name == 'fmt ' and size <= 50:
|
||
|
|
# This is a wav file.
|
||
|
|
data = file.read(size)
|
||
|
|
fmt = struct.unpack("<HHLLHH", data[:16])
|
||
|
|
self._set('codec', hex(fmt[0]))
|
||
|
|
self._set('samplerate', fmt[2])
|
||
|
|
# fmt[3] is average bytes per second, so we must divide it
|
||
|
|
# by 125 to get kbits per second
|
||
|
|
self._set('bitrate', fmt[3] / 125)
|
||
|
|
# ugly hack: remember original rate in bytes per second
|
||
|
|
# so that the length can be calculated in next elif block
|
||
|
|
self._set('byterate', fmt[3])
|
||
|
|
# Set a dummy fourcc so codec will be resolved in finalize.
|
||
|
|
self._set('fourcc', 'dummy')
|
||
|
|
elif name == 'data':
|
||
|
|
# XXX: this is naive and may not be right. For example if the
|
||
|
|
# stream is something that supports VBR like mp3, the value
|
||
|
|
# will be off. The only way to properly deal with this issue
|
||
|
|
# is to decode part of the stream based on its codec, but
|
||
|
|
# kaa.metadata doesn't have this capability (yet?)
|
||
|
|
# ugly hack: use original rate in bytes per second
|
||
|
|
self._set('length', size / float(self.byterate))
|
||
|
|
file.seek(size, 1)
|
||
|
|
elif not name.strip(string.printable + string.whitespace):
|
||
|
|
# check if name is something usefull at all, maybe it is no
|
||
|
|
# avi or broken
|
||
|
|
t = file.seek(size, 1)
|
||
|
|
log.debug(u'Skipping %r [%i]' % (name, size))
|
||
|
|
else:
|
||
|
|
# bad avi
|
||
|
|
log.debug(u'Bad or broken avi')
|
||
|
|
return False
|
||
|
|
return True
|
||
|
|
|
||
|
|
|
||
|
|
Parser = Riff
|