commit 3b907590053b084e3acf406740c2a1ff93b97d8f
author Mudassir Galagnath <mudassir.galaganath@ittiam.com> Tue May 18 20:11:52 2021 +0530
committer Yunqing Wang <yunqingwang@google.com> Wed May 19 16:17:05 2021 +0000
tree 0cc6c07d6b75764734be0b77c5ef1a4fdf2a3e59
parent 0123c298690cf131f6ed77d2357ef9fcd8b36419

Reduce entropy cost update frequency for coeff

A speed feature option is introduced to reduce entropy cost update
frequency for coeff. This change is applicable for speed preset 6.

          Instruction Count          BD-Rate Loss(%)
cpu-used    Reduction(%)    avg.psnr  ovr.psnr  ssim
   6          0.755         0.0971    0.0938    0.0999

 STATS_CHANGED

Change-Id: I75025ad29c884b12e54e83f271add36c0f779b31

av1/encoder/encodeframe_utils.c

diff --git a/av1/encoder/encodeframe_utils.c b/av1/encoder/encodeframe_utils.c
index 12cfc08..5bc6357 100644
--- a/av1/encoder/encodeframe_utils.c
+++ b/av1/encoder/encodeframe_utils.c
@@ -1371,6 +1371,9 @@
       if (mi_col != tile_info->mi_col_start) break;
       AOM_FALLTHROUGH_INTENDED;
     case COST_UPD_SB:  // SB level
+      if (cpi->sf.inter_sf.coeff_cost_upd_level == INTERNAL_COST_UPD_SBROW &&
+          mi_col != tile_info->mi_col_start)
+        break;
       av1_fill_coeff_costs(&x->coeff_costs, xd->tile_ctx, num_planes);
       break;
     default: assert(0);

av1/encoder/speed_features.c

diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index 1378f99..ebbdb2e 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -707,6 +707,7 @@
 
     if (!is_720p_or_larger) {
       sf->inter_sf.mv_cost_upd_level = INTERNAL_COST_UPD_SBROW_SET;
+      sf->inter_sf.coeff_cost_upd_level = INTERNAL_COST_UPD_SBROW;
     }
 
     if (is_720p_or_larger) {
@@ -1591,6 +1592,7 @@
   inter_sf->use_dist_wtd_comp_flag = DIST_WTD_COMP_ENABLED;
   inter_sf->reuse_inter_intra_mode = 0;
   inter_sf->mv_cost_upd_level = INTERNAL_COST_UPD_SB;
+  inter_sf->coeff_cost_upd_level = INTERNAL_COST_UPD_SB;
   inter_sf->prune_inter_modes_based_on_tpl = 0;
   inter_sf->prune_nearmv_using_neighbors = 0;
   inter_sf->prune_comp_search_by_single_result = 0;

av1/encoder/speed_features.h

diff --git a/av1/encoder/speed_features.h b/av1/encoder/speed_features.h
index b56d97a..d237374 100644
--- a/av1/encoder/speed_features.h
+++ b/av1/encoder/speed_features.h
@@ -774,6 +774,9 @@
   // Clip the frequency of updating the mv cost.
   INTERNAL_COST_UPDATE_TYPE mv_cost_upd_level;
 
+  // Clip the frequency of updating the coeff cost.
+  INTERNAL_COST_UPDATE_TYPE coeff_cost_upd_level;
+
   // Prune inter modes based on tpl stats
   // 0 : no pruning
   // 1 - 3 indicate increasing aggressiveness in order.