Lol

venv/lib/python3.11/site-packages/PIL/MpegImagePlugin.py

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+#
+# The Python Imaging Library.
+# $Id$
+#
+# MPEG file handling
+#
+# History:
+#       95-09-09 fl     Created
+#
+# Copyright (c) Secret Labs AB 1997.
+# Copyright (c) Fredrik Lundh 1995.
+#
+# See the README file for information on usage and redistribution.
+#
+from __future__ import annotations
+
+from . import Image, ImageFile
+from ._binary import i8
+from ._typing import SupportsRead
+
+#
+# Bitstream parser
+
+
+class BitStream:
+    def __init__(self, fp: SupportsRead[bytes]) -> None:
+        self.fp = fp
+        self.bits = 0
+        self.bitbuffer = 0
+
+    def next(self) -> int:
+        return i8(self.fp.read(1))
+
+    def peek(self, bits: int) -> int:
+        while self.bits < bits:
+            c = self.next()
+            if c < 0:
+                self.bits = 0
+                continue
+            self.bitbuffer = (self.bitbuffer << 8) + c
+            self.bits += 8
+        return self.bitbuffer >> (self.bits - bits) & (1 << bits) - 1
+
+    def skip(self, bits: int) -> None:
+        while self.bits < bits:
+            self.bitbuffer = (self.bitbuffer << 8) + i8(self.fp.read(1))
+            self.bits += 8
+        self.bits = self.bits - bits
+
+    def read(self, bits: int) -> int:
+        v = self.peek(bits)
+        self.bits = self.bits - bits
+        return v
+
+
+def _accept(prefix: bytes) -> bool:
+    return prefix[:4] == b"\x00\x00\x01\xb3"
+
+
+##
+# Image plugin for MPEG streams.  This plugin can identify a stream,
+# but it cannot read it.
+
+
+class MpegImageFile(ImageFile.ImageFile):
+    format = "MPEG"
+    format_description = "MPEG"
+
+    def _open(self) -> None:
+        assert self.fp is not None
+
+        s = BitStream(self.fp)
+        if s.read(32) != 0x1B3:
+            msg = "not an MPEG file"
+            raise SyntaxError(msg)
+
+        self._mode = "RGB"
+        self._size = s.read(12), s.read(12)
+
+
+# --------------------------------------------------------------------
+# Registry stuff
+
+Image.register_open(MpegImageFile.format, MpegImageFile, _accept)
+
+Image.register_extensions(MpegImageFile.format, [".mpg", ".mpeg"])
+
+Image.register_mime(MpegImageFile.format, "video/mpeg")