From 00829b9bc103646a79614e15d15e0d2a0e0c6868 Mon Sep 17 00:00:00 2001
From: Loren Merritt <lorenm@u.washington.edu>
Date: Tue, 26 Feb 2008 07:35:56 +0000
Subject: [PATCH] simplify

Originally committed as revision 12224 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/pngenc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/pngenc.c b/libavcodec/pngenc.c
index 10ed5afad0..703371d856 100644
--- a/libavcodec/pngenc.c
+++ b/libavcodec/pngenc.c
@@ -158,7 +158,7 @@ static uint8_t *png_choose_filter(PNGEncContext *s, uint8_t *dst,
             buf1[0] = pred;
             cost = 0;
             for(i=0; i<=size; i++)
-                cost += abs(0x80 - (buf1[i] ^ 0x80));
+                cost += abs((int8_t)buf1[i]);
             if(cost < bcost) {
                 bcost = cost;
                 FFSWAP(uint8_t*, buf1, buf2);