shithub: libvpx

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Optimize the checking for transform skipping

If U is not skippable, then do not perform the check on V.

Change-Id: Iba5e8362bd42390197f373c44388a426a4404549

--- a/vp9/encoder/vp9_pickmode.c

+++ b/vp9/encoder/vp9_pickmode.c

@@ -391,10 +391,11 @@

       var_uv[j] = cpi->fn_ptr[uv_bsize].vf(p->src.buf, p->src.stride,

           pd->dst.buf, pd->dst.stride, &sse_uv[j]);

-      if (var_uv[j] < uv_ac_thr || var_uv[j] == 0) {

-        if (sse_uv[j] - var_uv[j] < uv_dc_thr || sse_uv[j] == var_uv[j])

-          skip_uv[j] = 1;

-      }

+      if ((var_uv[j] < uv_ac_thr || var_uv[j] == 0) &&

+          (sse_uv[j] - var_uv[j] < uv_dc_thr || sse_uv[j] == var_uv[j]))

+        skip_uv[j] = 1;

+      else

+        break;

     }

     // If the transform in YUV planes are skippable, the mode search checks