From a282102d3fe2aea2302096e8a75320a2b8ef1cc7 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Tue, 21 Aug 2007 20:15:52 +0000
Subject: optimization tips for the wavelet

Originally committed as revision 10178 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 doc/snow.txt | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'doc/snow.txt')

diff --git a/doc/snow.txt b/doc/snow.txt
index c3e16ebc1c..12377e6db9 100644
--- a/doc/snow.txt
+++ b/doc/snow.txt
@@ -323,6 +323,10 @@ snows 9/7 Integer filter:
 / | \|/ | \|/ | \|/ | \|/
   |  +  |  +  |  +  |  +   +3/2
 
+optimization tips:
+following are exactly identical
+(3a)>>1 == a + (a>>1)
+(a + 4b + 8)>>4 == ((a>>2) + b + 2)>>2
 
 TODO:
 =====
-- 
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