From 78d2d4e1111f1284e12da9ae4daa0b7c14733055 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 31 Mar 2006 17:43:28 +0000
Subject: do UPDATE_CACHE only when needed (which should be VERY rare)

Originally committed as revision 5254 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/mjpeg.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'libavcodec/mjpeg.c')

diff --git a/libavcodec/mjpeg.c b/libavcodec/mjpeg.c
index 8c90022bc5..2fc870a61a 100644
--- a/libavcodec/mjpeg.c
+++ b/libavcodec/mjpeg.c
@@ -1286,8 +1286,9 @@ static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
         } else {
             i += ((unsigned)code) >> 4;
             code &= 0xf;
-
-            UPDATE_CACHE(re, &s->gb)
+            if(code > MIN_CACHE_BITS - 16){
+                UPDATE_CACHE(re, &s->gb)
+            }
             {
                 int cache=GET_CACHE(re,gb);
                 int sign=(~cache)>>31;
-- 
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