From: Ronald S. Bultje <rbultje@google.com>
Date: Tue, 24 Jul 2012 22:22:14 +0000 (-0700)
Subject: Replace x*155/100 by x*101581>>16.
X-Git-Tag: v1.2.0~132
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=980ca6324f01cdfbf6a456b9abc3eb6a9d497520;p=libvpx

Replace x*155/100 by x*101581>>16.

Idea stolen from webp - because it's cool.

Change-Id: Ic6e55e026e6533fbd2524ef090e3cbccf8af50dd
---

diff --git a/vp8/common/quant_common.c b/vp8/common/quant_common.c
index e9833fe33..a0b212cc4 100644
--- a/vp8/common/quant_common.c
+++ b/vp8/common/quant_common.c
@@ -109,7 +109,7 @@ int vp8_ac2quant(int QIndex, int Delta)
     else if (QIndex < 0)
         QIndex = 0;
 
-    retval = (ac_qlookup[ QIndex ] * 155) / 100;
+    retval = (ac_qlookup[ QIndex ] * 101581) >> 16;
 
     if (retval < 8)
         retval = 8;