kaitai: adjustments and rearrangements for python2/3 compat

1 files changed, 149 insertions, 0 deletions

diff --git a/python/examples/kaitai/rtp_packet.py b/python/examples/kaitai/rtp_packet.py
new file mode 100644
index 00000000..cedcd0f9
--- /dev/null
+++ b/python/examples/kaitai/rtp_packet.py
@@ -0,0 +1,149 @@
+# 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
+from enum import Enum
+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 RtpPacket(KaitaiStruct):
+    """The Real-time Transport Protocol (RTP) is a widely used network
+    protocol for transmitting audio or video. It usually works with the
+    RTP Control Protocol (RTCP). The transmission can be based on
+    Transmission Control Protocol (TCP) or User Datagram Protocol (UDP).
+    """
+
+    class PayloadTypeEnum(Enum):
+        pcmu = 0
+        reserved1 = 1
+        reserved2 = 2
+        gsm = 3
+        g723 = 4
+        dvi4_1 = 5
+        dvi4_2 = 6
+        lpc = 7
+        pama = 8
+        g722 = 9
+        l16_1 = 10
+        l16_2 = 11
+        qcelp = 12
+        cn = 13
+        mpa = 14
+        g728 = 15
+        dvi4_3 = 16
+        dvi4_4 = 17
+        g729 = 18
+        reserved3 = 19
+        unassigned1 = 20
+        unassigned2 = 21
+        unassigned3 = 22
+        unassigned4 = 23
+        unassigned5 = 24
+        celb = 25
+        jpeg = 26
+        unassigned6 = 27
+        nv = 28
+        unassigned7 = 29
+        unassigned8 = 30
+        h261 = 31
+        mpv = 32
+        mp2t = 33
+        h263 = 34
+        mpeg_ps = 96
+    SEQ_FIELDS = ["version", "has_padding", "has_extension", "csrc_count", "marker", "payload_type", "sequence_number", "timestamp", "ssrc", "header_extension", "data", "padding"]
+    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['version']['start'] = self._io.pos()
+        self.version = self._io.read_bits_int(2)
+        self._debug['version']['end'] = self._io.pos()
+        self._debug['has_padding']['start'] = self._io.pos()
+        self.has_padding = self._io.read_bits_int(1) != 0
+        self._debug['has_padding']['end'] = self._io.pos()
+        self._debug['has_extension']['start'] = self._io.pos()
+        self.has_extension = self._io.read_bits_int(1) != 0
+        self._debug['has_extension']['end'] = self._io.pos()
+        self._debug['csrc_count']['start'] = self._io.pos()
+        self.csrc_count = self._io.read_bits_int(4)
+        self._debug['csrc_count']['end'] = self._io.pos()
+        self._debug['marker']['start'] = self._io.pos()
+        self.marker = self._io.read_bits_int(1) != 0
+        self._debug['marker']['end'] = self._io.pos()
+        self._debug['payload_type']['start'] = self._io.pos()
+        self.payload_type = KaitaiStream.resolve_enum(self._root.PayloadTypeEnum, self._io.read_bits_int(7))
+        self._debug['payload_type']['end'] = self._io.pos()
+        self._io.align_to_byte()
+        self._debug['sequence_number']['start'] = self._io.pos()
+        self.sequence_number = self._io.read_u2be()
+        self._debug['sequence_number']['end'] = self._io.pos()
+        self._debug['timestamp']['start'] = self._io.pos()
+        self.timestamp = self._io.read_u4be()
+        self._debug['timestamp']['end'] = self._io.pos()
+        self._debug['ssrc']['start'] = self._io.pos()
+        self.ssrc = self._io.read_u4be()
+        self._debug['ssrc']['end'] = self._io.pos()
+        if self.has_extension:
+            self._debug['header_extension']['start'] = self._io.pos()
+            self.header_extension = self._root.HeaderExtention(self._io, self, self._root)
+            self.header_extension._read()
+            self._debug['header_extension']['end'] = self._io.pos()
+
+        self._debug['data']['start'] = self._io.pos()
+        self.data = self._io.read_bytes(((self._io.size() - self._io.pos()) - self.len_padding))
+        self._debug['data']['end'] = self._io.pos()
+        self._debug['padding']['start'] = self._io.pos()
+        self.padding = self._io.read_bytes(self.len_padding)
+        self._debug['padding']['end'] = self._io.pos()
+
+    class HeaderExtention(KaitaiStruct):
+        SEQ_FIELDS = ["id", "length"]
+        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['id']['start'] = self._io.pos()
+            self.id = self._io.read_u2be()
+            self._debug['id']['end'] = self._io.pos()
+            self._debug['length']['start'] = self._io.pos()
+            self.length = self._io.read_u2be()
+            self._debug['length']['end'] = self._io.pos()
+
+
+    @property
+    def len_padding_if_exists(self):
+        """If padding bit is enabled, last byte of data contains number of
+        bytes appended to the payload as padding.
+        """
+        if hasattr(self, '_m_len_padding_if_exists'):
+            return self._m_len_padding_if_exists if hasattr(self, '_m_len_padding_if_exists') else None
+
+        if self.has_padding:
+            _pos = self._io.pos()
+            self._io.seek((self._io.size() - 1))
+            self._debug['_m_len_padding_if_exists']['start'] = self._io.pos()
+            self._m_len_padding_if_exists = self._io.read_u1()
+            self._debug['_m_len_padding_if_exists']['end'] = self._io.pos()
+            self._io.seek(_pos)
+
+        return self._m_len_padding_if_exists if hasattr(self, '_m_len_padding_if_exists') else None
+
+    @property
+    def len_padding(self):
+        """Always returns number of padding bytes to in the payload."""
+        if hasattr(self, '_m_len_padding'):
+            return self._m_len_padding if hasattr(self, '_m_len_padding') else None
+
+        self._m_len_padding = (self.len_padding_if_exists if self.has_padding else 0)
+        return self._m_len_padding if hasattr(self, '_m_len_padding') else None
+
+