class AtomListAdapter(Con.Adapter):
"""An adapter for turning an Atom into a list of atoms.
This works by parsing its data contents with Atom."""
ATOM_LIST = Con.GreedyRepeater(Atom("atoms"))
def _encode(self, obj, context):
obj.data = self.ATOM_LIST.build(obj.data)
return obj
def _decode(self, obj, context):
obj.data = self.ATOM_LIST.parse(obj.data)
return obj
return self.sub_atom.parse_stream(stream)
def _build(self, obj, stream, context):
data = self.sub_atom.build(obj)
stream.write(
self.header.build(
Con.Container(type=self.atom_name, size=len(data) + 8)))
stream.write(data)
def _sizeof(self, context):
return self.sub_atom.sizeof(context) + 8
ATOM_FTYP = Con.Struct("ftyp", Con.String("major_brand", 4),
Con.UBInt32("major_brand_version"),
Con.GreedyRepeater(Con.String("compatible_brands", 4)))
ATOM_MVHD = Con.Struct(
"mvhd", Con.Byte("version"), Con.String("flags", 3),
VersionLength("created_mac_UTC_date"),
VersionLength("modified_mac_UTC_date"), Con.UBInt32("time_scale"),
VersionLength("duration"), Con.UBInt32("playback_speed"),
Con.UBInt16("user_volume"), Con.Padding(10),
Con.Struct("windows", Con.UBInt32("geometry_matrix_a"),
Con.UBInt32("geometry_matrix_b"),
Con.UBInt32("geometry_matrix_u"),
Con.UBInt32("geometry_matrix_c"),
Con.UBInt32("geometry_matrix_d"),
Con.UBInt32("geometry_matrix_v"),
Con.UBInt32("geometry_matrix_x"),
Con.UBInt32("geometry_matrix_y"),
