shithub: libvpx

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Merge "Reduce computational complexity of generic C loop filter."

--- a/vp8/common/loopfilter_filters.c

+++ b/vp8/common/loopfilter_filters.c

@@ -29,15 +29,14 @@

                                      uc q0, uc q1, uc q2, uc q3)

 {

     signed char mask = 0;

-    mask |= (abs(p3 - p2) > limit) * -1;

-    mask |= (abs(p2 - p1) > limit) * -1;

-    mask |= (abs(p1 - p0) > limit) * -1;

-    mask |= (abs(q1 - q0) > limit) * -1;

-    mask |= (abs(q2 - q1) > limit) * -1;

-    mask |= (abs(q3 - q2) > limit) * -1;

-    mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  > blimit) * -1;

-    mask = ~mask;

-    return mask;

+    mask |= (abs(p3 - p2) > limit);

+    mask |= (abs(p2 - p1) > limit);

+    mask |= (abs(p1 - p0) > limit);

+    mask |= (abs(q1 - q0) > limit);

+    mask |= (abs(q2 - q1) > limit);

+    mask |= (abs(q3 - q2) > limit);

+    mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  > blimit);

+    return mask - 1;

 }

 /* is there high variance internal edge ( 11111111 yes, 00000000 no) */