shithub: libvpx

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Separate rd_thresh adaption by ref_frame

Only update the rd_thresh factors for modes sharing same reference
frame. This helps overall compression of 6 and 7 by .13% and .19%
respectively without any noticeable speed difference.

Change-Id: Idb3a3879512c5d7d0880034516079949290690c5

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

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

@@ -1052,6 +1052,7 @@

         mode_idx[INTRA_FRAME][mbmi->mode];

     PREDICTION_MODE this_mode;

     for (ref_frame = LAST_FRAME; ref_frame <= GOLDEN_FRAME; ++ref_frame) {

+      if (best_ref_frame != ref_frame) continue;

       for (this_mode = NEARESTMV; this_mode <= NEWMV; ++this_mode) {

         THR_MODES thr_mode_idx = mode_idx[ref_frame][INTER_OFFSET(this_mode)];

         int *freq_fact = &tile_data->thresh_freq_fact[bsize][thr_mode_idx];