shithub: libvpx

Info  •  Files  •  Log  •  Branches

vp9: SVC: Use prune_evenemore only for non_reference.

Set subpel prune_evenmore only for non_reference frames,
instead of all TL > 0 frames. Gain some quality back at
cost of small speed loss (~1-2%).

Change only effects SVC encoding at speed >= 7.

Change-Id: I5b9f51e51dccfd7050521a66996176b0415ca3f9

--- a/vp9/encoder/vp9_speed_features.c

+++ b/vp9/encoder/vp9_speed_features.c

@@ -551,8 +551,9 @@

       sf->mv.fullpel_search_step_param = 6;

     }

     if (cpi->svc.temporal_layer_id > 0) {

-      sf->mv.subpel_search_method = SUBPEL_TREE_PRUNED_EVENMORE;

       sf->use_simple_block_yrd = 1;

+      if (cpi->svc.non_reference_frame)

+        sf->mv.subpel_search_method = SUBPEL_TREE_PRUNED_EVENMORE;

     }

     if (!cpi->external_resize) sf->use_source_sad = 1;

     if (sf->use_source_sad) {