avfilter/vsrc_mptestsrc: use hypot()
authorGanesh Ajjanagadde <gajjanagadde@gmail.com>
Sun, 22 Nov 2015 16:50:22 +0000 (11:50 -0500)
committerGanesh Ajjanagadde <gajjanagadde@gmail.com>
Thu, 26 Nov 2015 14:20:46 +0000 (09:20 -0500)
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
libavfilter/vsrc_mptestsrc.c

index bc5b2cd..668a001 100644 (file)
@@ -240,7 +240,7 @@ static void ring2_test(uint8_t *dst, int dst_linesize, int off)
 
     for (y = 0; y < 16*16; y++) {
         for (x = 0; x < 16*16; x++) {
-            double d = sqrt((x-8*16)*(x-8*16) + (y-8*16)*(y-8*16));
+            double d = hypot(x-8*16, y-8*16);
             double r = d/20 - (int)(d/20);
             if (r < off/30.0) {
                 dst[x + y*dst_linesize]     = 255;