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# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
from pkg_resources import parse_version
from .kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO
import collections
if parse_version(ks_version) < parse_version('0.7'):
raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version))
class Vp8Ivf(KaitaiStruct):
"""IVF is a simple container format for raw VP8 data, which is an open
and royalty-free video compression format, currently developed by
Google.
Test .ivf files are available at https://chromium.googlesource.com/webm/vp8-test-vectors
.. seealso::
Source - https://wiki.multimedia.cx/index.php/IVF
"""
SEQ_FIELDS = ["magic1", "version", "len_header", "codec", "width", "height", "framerate", "timescale", "num_frames", "unused", "image_data"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['magic1']['start'] = self._io.pos()
self.magic1 = self._io.ensure_fixed_contents(b"\x44\x4B\x49\x46")
self._debug['magic1']['end'] = self._io.pos()
self._debug['version']['start'] = self._io.pos()
self.version = self._io.read_u2le()
self._debug['version']['end'] = self._io.pos()
self._debug['len_header']['start'] = self._io.pos()
self.len_header = self._io.read_u2le()
self._debug['len_header']['end'] = self._io.pos()
self._debug['codec']['start'] = self._io.pos()
self.codec = self._io.ensure_fixed_contents(b"\x56\x50\x38\x30")
self._debug['codec']['end'] = self._io.pos()
self._debug['width']['start'] = self._io.pos()
self.width = self._io.read_u2le()
self._debug['width']['end'] = self._io.pos()
self._debug['height']['start'] = self._io.pos()
self.height = self._io.read_u2le()
self._debug['height']['end'] = self._io.pos()
self._debug['framerate']['start'] = self._io.pos()
self.framerate = self._io.read_u4le()
self._debug['framerate']['end'] = self._io.pos()
self._debug['timescale']['start'] = self._io.pos()
self.timescale = self._io.read_u4le()
self._debug['timescale']['end'] = self._io.pos()
self._debug['num_frames']['start'] = self._io.pos()
self.num_frames = self._io.read_u4le()
self._debug['num_frames']['end'] = self._io.pos()
self._debug['unused']['start'] = self._io.pos()
self.unused = self._io.read_u4le()
self._debug['unused']['end'] = self._io.pos()
self._debug['image_data']['start'] = self._io.pos()
self.image_data = [None] * (self.num_frames)
for i in range(self.num_frames):
if not 'arr' in self._debug['image_data']:
self._debug['image_data']['arr'] = []
self._debug['image_data']['arr'].append({'start': self._io.pos()})
_t_image_data = self._root.Blocks(self._io, self, self._root)
_t_image_data._read()
self.image_data[i] = _t_image_data
self._debug['image_data']['arr'][i]['end'] = self._io.pos()
self._debug['image_data']['end'] = self._io.pos()
class Blocks(KaitaiStruct):
SEQ_FIELDS = ["entries"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['entries']['start'] = self._io.pos()
self.entries = self._root.Block(self._io, self, self._root)
self.entries._read()
self._debug['entries']['end'] = self._io.pos()
class Block(KaitaiStruct):
SEQ_FIELDS = ["len_frame", "timestamp", "framedata"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['len_frame']['start'] = self._io.pos()
self.len_frame = self._io.read_u4le()
self._debug['len_frame']['end'] = self._io.pos()
self._debug['timestamp']['start'] = self._io.pos()
self.timestamp = self._io.read_u8le()
self._debug['timestamp']['end'] = self._io.pos()
self._debug['framedata']['start'] = self._io.pos()
self.framedata = self._io.read_bytes(self.len_frame)
self._debug['framedata']['end'] = self._io.pos()
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