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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 Ogg(KaitaiStruct):
"""Ogg is a popular media container format, which provides basic
streaming / buffering mechanisms and is content-agnostic. Most
popular codecs that are used within Ogg streams are Vorbis (thus
making Ogg/Vorbis streams) and Theora (Ogg/Theora).
Ogg stream is a sequence Ogg pages. They can be read sequentially,
or one can jump into arbitrary stream location and scan for "OggS"
sync code to find the beginning of a new Ogg page and continue
decoding the stream contents from that one.
"""
SEQ_FIELDS = ["pages"]
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['pages']['start'] = self._io.pos()
self.pages = []
i = 0
while not self._io.is_eof():
if not 'arr' in self._debug['pages']:
self._debug['pages']['arr'] = []
self._debug['pages']['arr'].append({'start': self._io.pos()})
_t_pages = self._root.Page(self._io, self, self._root)
_t_pages._read()
self.pages.append(_t_pages)
self._debug['pages']['arr'][len(self.pages) - 1]['end'] = self._io.pos()
i += 1
self._debug['pages']['end'] = self._io.pos()
class Page(KaitaiStruct):
"""Ogg page is a basic unit of data in an Ogg bitstream, usually
it's around 4-8 KB, with a maximum size of 65307 bytes.
"""
SEQ_FIELDS = ["sync_code", "version", "reserved1", "is_end_of_stream", "is_beginning_of_stream", "is_continuation", "granule_pos", "bitstream_serial", "page_seq_num", "crc32", "num_segments", "len_segments", "segments"]
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['sync_code']['start'] = self._io.pos()
self.sync_code = self._io.ensure_fixed_contents(b"\x4F\x67\x67\x53")
self._debug['sync_code']['end'] = self._io.pos()
self._debug['version']['start'] = self._io.pos()
self.version = self._io.ensure_fixed_contents(b"\x00")
self._debug['version']['end'] = self._io.pos()
self._debug['reserved1']['start'] = self._io.pos()
self.reserved1 = self._io.read_bits_int(5)
self._debug['reserved1']['end'] = self._io.pos()
self._debug['is_end_of_stream']['start'] = self._io.pos()
self.is_end_of_stream = self._io.read_bits_int(1) != 0
self._debug['is_end_of_stream']['end'] = self._io.pos()
self._debug['is_beginning_of_stream']['start'] = self._io.pos()
self.is_beginning_of_stream = self._io.read_bits_int(1) != 0
self._debug['is_beginning_of_stream']['end'] = self._io.pos()
self._debug['is_continuation']['start'] = self._io.pos()
self.is_continuation = self._io.read_bits_int(1) != 0
self._debug['is_continuation']['end'] = self._io.pos()
self._io.align_to_byte()
self._debug['granule_pos']['start'] = self._io.pos()
self.granule_pos = self._io.read_u8le()
self._debug['granule_pos']['end'] = self._io.pos()
self._debug['bitstream_serial']['start'] = self._io.pos()
self.bitstream_serial = self._io.read_u4le()
self._debug['bitstream_serial']['end'] = self._io.pos()
self._debug['page_seq_num']['start'] = self._io.pos()
self.page_seq_num = self._io.read_u4le()
self._debug['page_seq_num']['end'] = self._io.pos()
self._debug['crc32']['start'] = self._io.pos()
self.crc32 = self._io.read_u4le()
self._debug['crc32']['end'] = self._io.pos()
self._debug['num_segments']['start'] = self._io.pos()
self.num_segments = self._io.read_u1()
self._debug['num_segments']['end'] = self._io.pos()
self._debug['len_segments']['start'] = self._io.pos()
self.len_segments = [None] * (self.num_segments)
for i in range(self.num_segments):
if not 'arr' in self._debug['len_segments']:
self._debug['len_segments']['arr'] = []
self._debug['len_segments']['arr'].append({'start': self._io.pos()})
self.len_segments[i] = self._io.read_u1()
self._debug['len_segments']['arr'][i]['end'] = self._io.pos()
self._debug['len_segments']['end'] = self._io.pos()
self._debug['segments']['start'] = self._io.pos()
self.segments = [None] * (self.num_segments)
for i in range(self.num_segments):
if not 'arr' in self._debug['segments']:
self._debug['segments']['arr'] = []
self._debug['segments']['arr'].append({'start': self._io.pos()})
self.segments[i] = self._io.read_bytes(self.len_segments[i])
self._debug['segments']['arr'][i]['end'] = self._io.pos()
self._debug['segments']['end'] = self._io.pos()
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