shithub: libvpx

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Set the skip flag to 1 for skippable blocks

If the partition block is skippable, which means no coefficients
for Y, U, and V planes, its skip flag is set to 1. No quality
change (verified by borg tests), and no noticeable speed change.

Change-Id: I9231f720f8dd6364384cf05aa148ca24d75450f1

--- a/vp9/encoder/vp9_rdopt.c

+++ b/vp9/encoder/vp9_rdopt.c

@@ -3161,6 +3161,10 @@

     vp9_zero(best_tx_diff);

   }

+  // TODO(yunqingwang): Moving this line in front of the above best_filter_diff

+  // updating code causes PSNR loss. Need to figure out the confliction.

+  x->skip |= best_mode_skippable;

+

   store_coding_context(x, ctx, best_mode_index, best_pred_diff,

                        best_tx_diff, best_filter_diff, best_mode_skippable);