From 513fbd8e5ab9ca266394112b177a40b6eb1d8208 Mon Sep 17 00:00:00 2001
From: Loren Merritt <lorenm@u.washington.edu>
Date: Thu, 23 Mar 2006 20:16:36 +0000
Subject: prefetch pixels for future motion compensation. 2-5% faster h264.

Originally committed as revision 5203 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/dsputil.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'libavcodec/dsputil.c')

diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 87eb49bacc..688f0a9618 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -3773,6 +3773,8 @@ static void ff_jref_idct1_add(uint8_t *dest, int line_size, DCTELEM *block)
     dest[0] = cm[dest[0] + ((block[0] + 4)>>3)];
 }
 
+static void just_return() { return; }
+
 /* init static data */
 void dsputil_static_init(void)
 {
@@ -4054,6 +4056,8 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
     c->inner_add_yblock = ff_snow_inner_add_yblock;
 #endif
 
+    c->prefetch= just_return;
+
 #ifdef HAVE_MMX
     dsputil_init_mmx(c, avctx);
 #endif
-- 
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