shithub: libvpx

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Reuse inter prediction pixel block for Hadamard transform

It saves one unnecessary motion compensated prediction constructed
by using 8-tap filter.

Change-Id: I101215131e6f38621d5935885f94cc74de6a5377

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

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

@@ -1050,6 +1050,10 @@

       var_y = pf_var[best_filter];

       sse_y = pf_sse[best_filter];

       x->skip_txfm[0] = skip_txfm;

+      if (reuse_inter_pred) {

+        pd->dst.buf = this_mode_pred->data;

+        pd->dst.stride = this_mode_pred->stride;

+      }

     } else {

       mbmi->interp_filter = (filter_ref == SWITCHABLE) ? EIGHTTAP : filter_ref;

       vp9_build_inter_predictors_sby(xd, mi_row, mi_col, bsize);

@@ -1075,7 +1079,6 @@

 //      this_rdc.dist += uv_dist;

 //    }

-    vp9_build_inter_predictors_sby(xd, mi_row, mi_col, bsize);

     block_yrd(cpi, x, &this_rdc.rate, &this_rdc.dist, &is_skippable, &this_sse,

               0, bsize, mbmi->tx_size);

     x->skip_txfm[0] = is_skippable;