From 7cd7d19e86f98a0806429a623bb0b010a24ce93a Mon Sep 17 00:00:00 2001
From: Måns Rullgård <mans@mansr.com>
Date: Sun, 21 Feb 2010 21:48:40 +0000
Subject: Deobfuscate LE SHOW_[SU]BITS; these are simple sign/zero-extend

Originally committed as revision 21948 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/get_bits.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'libavcodec/get_bits.h')

diff --git a/libavcodec/get_bits.h b/libavcodec/get_bits.h
index bb40ff4f38..7c4ee4386c 100644
--- a/libavcodec/get_bits.h
+++ b/libavcodec/get_bits.h
@@ -166,10 +166,10 @@ for examples see get_bits, show_bits, skip_bits, get_vlc
 
 # ifdef ALT_BITSTREAM_READER_LE
 #   define SHOW_UBITS(name, gb, num)\
-        ((name##_cache) & (NEG_USR32(0xffffffff,num)))
+        zero_extend(name##_cache, num)
 
 #   define SHOW_SBITS(name, gb, num)\
-        NEG_SSR32((name##_cache)<<(32-(num)), num)
+        sign_extend(name##_cache, num)
 # else
 #   define SHOW_UBITS(name, gb, num)\
         NEG_USR32(name##_cache, num)
-- 
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