def extractAVI(self, headers, **kwargs):
audio_index = 1
for stream in headers.array("stream"):
if "stream_hdr/stream_type" not in stream:
continue
stream_type = stream["stream_hdr/stream_type"].value
if stream_type == "vids":
if "stream_hdr" in stream:
meta = Metadata(self)
self.extractAVIVideo(stream["stream_hdr"], meta)
self.addGroup("video", meta, "Video stream")
elif stream_type == "auds":
if "stream_fmt" in stream:
meta = Metadata(self)
self.extractAVIAudio(stream["stream_fmt"], meta)
self.addGroup("audio[%u]" % audio_index, meta,
"Audio stream")
audio_index += 1
if "avi_hdr" in headers:
self.useAviHeader(headers["avi_hdr"])
# Compute global bit rate
if self.has("duration") and "/movie/size" in headers:
self.bit_rate = float(
headers["/movie/size"].value) * 8 / timedelta2seconds(
self.get('duration'))
# Video has index?
scan_index = (True, kwargs['scan_index'])['scan_index' in kwargs]
if scan_index and "/index" in headers:
self.comment = _("Has audio/video index (%s)") \
% humanFilesize(headers["/index"].size // 8)
def createDescription(self):
if self.isEmpty():
desc = "(terminator, empty header)"
else:
filename = self["name"].value
if self["prefix"].value:
filename = self["prefix"].value + '/' + filename
filesize = humanFilesize(self.getOctal("size"))
desc = "(%s: %s, %s)" % \
(filename, self["type"].display, filesize)
return "Tar File " + desc
def __init__(self,
parent,
name,
length,
decompressor,
description=None,
parser=None,
filename=None,
mime_type=None,
parser_class=None):
if filename:
if not isinstance(filename, unicode):
filename = makePrintable(filename, "ISO-8859-1")
if not description:
description = 'File "%s" (%s)' % (filename,
humanFilesize(length))
Bytes.__init__(self, parent, name, length, description)
self.setupInputStream(decompressor, parser, filename, mime_type,
parser_class)
def checkPattern(self):
if not (config.check_padding_pattern):
return False
if self.pattern is None:
return False
if self.MAX_SIZE < self._size // 8:
self.info("only check first %s of padding" %
humanFilesize(self.MAX_SIZE))
content = self._parent.stream.readBytes(self.absolute_address,
self.MAX_SIZE)
else:
content = self.value
index = 0
pattern_len = len(self.pattern)
while index < len(content):
if content[index:index + pattern_len] != self.pattern:
self.warning("padding contents doesn't look normal"
" (invalid pattern at byte %u)!" % index)
return False
index += pattern_len
return True
def __init__(self, parent, name, description=None):
FieldSet.__init__(self, parent, name, description)
self._size = (self["size"].value + 3 * 4) * 8
if MAX_CHUNK_SIZE < (self._size // 8):
raise ParserError("PNG: Chunk is too big (%s)" %
humanFilesize(self._size // 8))
tag = self["tag"].value
self.desc_func = None
self.value_func = None
if tag in self.TAG_INFO:
self._name, self.parse_func, desc, value_func = self.TAG_INFO[tag]
if value_func:
self.value_func = value_func
self.createValue = self.createValueFunc
if desc:
if isinstance(desc, str):
self._description = desc
else:
self.desc_func = desc
else:
self._description = ""
self.parse_func = None
def __init__(self, parent, name, length, description=None,
parser=None, filename=None, mime_type=None, parser_class=None):
if filename:
if not isinstance(filename, unicode):
filename = makePrintable(filename, "ISO-8859-1")
if not description:
description = 'File "%s" (%s)' % (filename, humanFilesize(length))
Bytes.__init__(self, parent, name, length, description)
def createInputStream(cis, **args):
tags = args.setdefault("tags", [])
if parser_class:
tags.append(("class", parser_class))
if parser is not None:
tags.append(("id", parser.PARSER_TAGS["id"]))
if mime_type:
tags.append(("mime", mime_type))
if filename:
tags.append(("filename", filename))
return cis(**args)
self.setSubIStream(createInputStream)
def createDescription(self):
return "%d blocks of %s" % (self["num_blocks"].value,
humanFilesize(self["len"].value))
def createDisplay(self):
if not self["value"].hasValue():
return None
if self._name in ("length", "piece_length"):
return humanFilesize(self.value)
return FieldSet.createDisplay(self)
