simplify

Originally committed as revision 12224 to svn://svn.ffmpeg.org/ffmpeg/trunk
17 years ago · 00829b9bc1
parent 97d1d009e2
commit 00829b9bc1
1 changed files with 1 additions and 1 deletions
--- 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);