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-rw-r--r--PIL/MpegImagePlugin.py83
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diff --git a/PIL/MpegImagePlugin.py b/PIL/MpegImagePlugin.py
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+#
+# The Python Imaging Library.
+# $Id: MpegImagePlugin.py 2134 2004-10-06 08:55:20Z fredrik $
+#
+# 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.
+#
+
+__version__ = "0.1"
+
+import array, string
+import Image, ImageFile
+
+#
+# Bitstream parser
+
+class BitStream:
+
+ def __init__(self, fp):
+ self.fp = fp
+ self.bits = 0
+ self.bitbuffer = 0
+
+ def next(self):
+ return ord(self.fp.read(1))
+
+ def peek(self, bits):
+ while self.bits < bits:
+ c = self.next()
+ if c < 0:
+ self.bits = 0
+ continue
+ self.bitbuffer = (self.bitbuffer << 8) + c
+ self.bits = self.bits + 8
+ return self.bitbuffer >> (self.bits - bits) & (1L << bits) - 1
+
+ def skip(self, bits):
+ while self.bits < bits:
+ self.bitbuffer = (self.bitbuffer << 8) + ord(self.fp.read(1))
+ self.bits = self.bits + 8
+ self.bits = self.bits - bits
+
+ def read(self, bits):
+ v = self.peek(bits)
+ self.bits = self.bits - bits
+ return v
+
+##
+# 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):
+
+ s = BitStream(self.fp)
+
+ if s.read(32) != 0x1B3:
+ raise SyntaxError, "not an MPEG file"
+
+ self.mode = "RGB"
+ self.size = s.read(12), s.read(12)
+
+
+# --------------------------------------------------------------------
+# Registry stuff
+
+Image.register_open("MPEG", MpegImageFile)
+
+Image.register_extension("MPEG", ".mpg")
+Image.register_extension("MPEG", ".mpeg")
+
+Image.register_mime("MPEG", "video/mpeg")