def __init__(self, parent, name, description=None):
GenericInteger.__init__(self, parent, name, False, 8, description)
i = GenericInteger.createValue(self)
if i == 0:
raise ParserError('Invalid integer length!')
while i < 0x80:
self._size += 8
i <<= 1
def __init__(self, parent, name, description=None):
GenericInteger.__init__(self, parent, name, False, 8, description)
i = GenericInteger.createValue(self)
if i == 0:
raise ParserError('Invalid integer length!')
while i < 0x80:
self._size += 8
i <<= 1
def createFields(self):
yield Unsigned(self, 'track')
yield Int16(self, 'timecode')
if self.parent._name == 'Block':
yield NullBits(self, 'reserved[]', 4)
yield Bit(self, 'invisible')
yield self.lacing()
yield NullBits(self, 'reserved[]', 1)
elif self.parent._name == 'SimpleBlock[]':
yield Bit(self, 'keyframe')
yield NullBits(self, 'reserved', 3)
yield Bit(self, 'invisible')
yield self.lacing()
yield Bit(self, 'discardable')
else:
yield NullBits(self, 'reserved', 8)
return
size = (self._size - self.current_size) / 8
lacing = self['lacing'].value
if lacing:
yield textHandler(GenericInteger(self, 'n_frames', False, 8),
lambda chunk: str(chunk.value + 1))
yield Lace(self, lacing - 1, size - 1)
else:
yield RawBytes(self, 'frame', size)
def readInteger(self, content_size):
# Always signed?
yield GenericInteger(self, "value", True, content_size*8)
def SInt(parent):
return GenericInteger(parent, 'signed', True, parent['size'].value * 8)
def UInt(parent):
return GenericInteger(parent, 'unsigned', False, parent['size'].value * 8)
def Bool(parent):
return textHandler(
GenericInteger(parent, 'bool', False, parent['size'].value * 8),
lambda chunk: str(chunk.value != 0))
def Enum(parent, enum):
return _Enum(
GenericInteger(parent, 'enum', False, parent['size'].value * 8), enum)
def SeekID(parent):
return textHandler(
GenericInteger(parent, 'binary', False, parent['size'].value * 8),
lambda chunk: segment.get(chunk.value, (hexadecimal(chunk), ))[0])
def Date(parent):
return textHandler(
GenericInteger(parent, 'date', True, parent['size'].value * 8),
dateToString)
def __init__(self, parent, name, description=None):
size = parent['/trailer/objectRefSize'].value * 8
GenericInteger.__init__(self, parent, name, False, size, description)
def createFields(self):
yield Enum(
Bits(self, "marker_type", 4), {
0: "Simple",
1: "Int",
2: "Real",
3: "Date",
4: "Data",
5: "ASCII String",
6: "UTF-16-BE String",
8: "UID",
10: "Array",
13: "Dict",
})
markertype = self['marker_type'].value
if markertype == 0:
# Simple (Null)
yield Enum(Bits(self, "value", 4), {
0: "Null",
8: "False",
9: "True",
15: "Fill Byte",
})
if self['value'].display == "False":
self.xml = lambda prefix: prefix + "<false/>"
elif self['value'].display == "True":
self.xml = lambda prefix: prefix + "<true/>"
else:
self.xml = lambda prefix: prefix + ""
elif markertype == 1:
# Int
yield Bits(self, "size", 4, "log2 of number of bytes")
size = self['size'].value
# 8-bit (size=0), 16-bit (size=1) and 32-bit (size=2) numbers are unsigned
# 64-bit (size=3) numbers are signed
yield GenericInteger(self, "value", (size >= 3), (2**size) * 8)
self.xml = lambda prefix: prefix + "<integer>%s</integer>" % self[
'value'].value
elif markertype == 2:
# Real
yield Bits(self, "size", 4, "log2 of number of bytes")
if self['size'].value == 2: # 2**2 = 4 byte float
yield Float32(self, "value")
elif self['size'].value == 3: # 2**3 = 8 byte float
yield Float64(self, "value")
else:
# FIXME: What is the format of the real?
yield Bits(self, "value", (2**self['size'].value) * 8)
self.xml = lambda prefix: prefix + "<real>%s</real>" % self['value'
].value
elif markertype == 3:
# Date
yield Bits(self, "extra", 4, "Extra value, should be 3")
cvt_time = lambda v: datetime(2001, 1, 1) + timedelta(seconds=v)
yield displayHandler(Float64(self, "value"),
lambda x: humanDatetime(cvt_time(x)))
self.xml = lambda prefix: prefix + "<date>%s</date>" % (cvt_time(
self['value'].value).isoformat())
elif markertype == 4:
# Data
yield BPListSize(self, "size")
if self['size'].value:
yield Bytes(self, "value", self['size'].value)
self.xml = lambda prefix: prefix + "<data>\n%s\n%s</data>" % (
self['value'].value.encode('base64').strip(), prefix)
else:
self.xml = lambda prefix: prefix + '<data></data>'
elif markertype == 5:
# ASCII String
yield BPListSize(self, "size")
if self['size'].value:
yield String(self,
"value",
self['size'].value,
charset="ASCII")
self.xml = lambda prefix: prefix + "<string>%s</string>" % (
self['value'].value.encode('iso-8859-1'))
else:
self.xml = lambda prefix: prefix + '<string></string>'
elif markertype == 6:
# UTF-16-BE String
yield BPListSize(self, "size")
if self['size'].value:
yield String(self,
"value",
self['size'].value * 2,
charset="UTF-16-BE")
self.xml = lambda prefix: prefix + "<string>%s</string>" % (
self['value'].value.encode('utf-8'))
else:
self.xml = lambda prefix: prefix + '<string></string>'
elif markertype == 8:
# UID
yield Bits(self, "size", 4, "Number of bytes minus 1")
yield GenericInteger(self, "value", False,
(self['size'].value + 1) * 8)
self.xml = lambda prefix: prefix + "" # no equivalent?
elif markertype == 10:
# Array
yield BPListSize(self, "size")
size = self['size'].value
if size:
yield BPListArray(self, "value", size)
self.xml = lambda prefix: self['value'].createXML(prefix)
elif markertype == 13:
# Dict
yield BPListSize(self, "size")
yield BPListDict(self, "value", self['size'].value)
self.xml = lambda prefix: self['value'].createXML(prefix)
else:
yield Bits(self, "value", 4)
self.xml = lambda prefix: ''
def __init__(self, parent, name, description=None):
size = parent['/trailer/objectRefSize'].value*8
GenericInteger.__init__(self, parent, name, False, size, description)
