cmkpV += cmk_linesizeUV;
cmkpU += cmk_linesizeUV;
for (x = 1; x < width - 1; x++) {
-#define HAS_FF_AROUND(p, lz) (p[x-1 - lz] == 0xff || p[x - lz] == 0xff || p[x+1 - lz] == 0xff || \
- p[x-1 ] == 0xff || p[x+1 ] == 0xff || \
- p[x-1 + lz] == 0xff || p[x + lz] == 0xff || p[x+1 + lz] == 0xff)
+#define HAS_FF_AROUND(p, lz) (p[(x)-1 - (lz)] == 0xff || p[(x) - (lz)] == 0xff || p[(x)+1 - (lz)] == 0xff || \
+ p[(x)-1 ] == 0xff || p[(x)+1 ] == 0xff || \
+ p[(x)-1 + (lz)] == 0xff || p[(x) + (lz)] == 0xff || p[(x)+1 + (lz)] == 0xff)
if ((cmkpV[x] == 0xff && HAS_FF_AROUND(cmkpV, cmk_linesizeUV)) ||
(cmkpU[x] == 0xff && HAS_FF_AROUND(cmkpU, cmk_linesizeUV))) {
((uint16_t*)cmkp)[x] = 0xffff;