shithub: libvpx

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Remove branch in inner loop of foreach_transformed_block_in_plane()

Change-Id: Ib14d09376a9ce4fa5f541264e5c335aceb71380a

--- a/vp9/common/vp9_blockd.c

+++ b/vp9/common/vp9_blockd.c

@@ -59,16 +59,17 @@

       xd->mb_to_right_edge >> (5 + pd->subsampling_x));

   const int max_blocks_high = num_4x4_h + (xd->mb_to_bottom_edge >= 0 ? 0 :

       xd->mb_to_bottom_edge >> (5 + pd->subsampling_y));

+  const int extra_step = ((num_4x4_w - max_blocks_wide) >> tx_size) * step;

   // Keep track of the row and column of the blocks we use so that we know

   // if we are in the unrestricted motion border.

   for (r = 0; r < max_blocks_high; r += (1 << tx_size)) {

-    for (c = 0; c < num_4x4_w; c += (1 << tx_size)) {

-      // Skip visiting the sub blocks that are wholly within the UMV.

-      if (c < max_blocks_wide)

-        visit(plane, i, plane_bsize, tx_size, arg);

+    // Skip visiting the sub blocks that are wholly within the UMV.

+    for (c = 0; c < max_blocks_wide; c += (1 << tx_size)) {

+      visit(plane, i, plane_bsize, tx_size, arg);

       i += step;

     }

+    i += extra_step;

   }

 }