commit e3f2433ecb59715070d3f63e23e9f56538982199
author Yunqing Wang <yunqingwang@google.com> Wed Jun 10 11:20:30 2020 -0700
committer Yunqing Wang <yunqingwang@google.com> Fri Jun 12 01:50:31 2020 +0000
tree 8bc1e19395389185f19a614cdbe7821da9237600
parent 1441b9347515b4cb9bbd7ab902abb15596abcd5d

Prune sgr serarch for screen content

Pruned sgr filter search for screen content at speed 2 by enabling
prune_sgr_based_on_wiener feature. A small speedup was seen. The
average quality & speed changes for screen contents are given below.

avg_psnr  ovr_psnr  ssim   speedup %
 0.002     0.010    0.121   0.46

BUG=aomedia:2711

STATS_CHANGED

Change-Id: I20fd788b743bdb12508bee4e1ba6cced055409bf

av1/encoder/speed_features.c

diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index 117e5d0..94a0b5d 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -439,7 +439,7 @@
     sf->rd_sf.perform_coeff_opt = is_boosted_arf2_bwd_type ? 3 : 4;
 
     sf->lpf_sf.prune_wiener_based_on_src_var = 1;
-    sf->lpf_sf.prune_sgr_based_on_wiener = !allow_screen_content_tools;
+    sf->lpf_sf.prune_sgr_based_on_wiener = 1;
   }
 
   if (speed >= 3) {
@@ -506,7 +506,9 @@
                                                                          : 2;
 
     // TODO(any): evaluate if these lpf features can be moved to speed 2.
-    sf->lpf_sf.prune_sgr_based_on_wiener = allow_screen_content_tools ? 0 : 2;
+    // For screen content, "prune_sgr_based_on_wiener = 2" cause large quality
+    // loss.
+    sf->lpf_sf.prune_sgr_based_on_wiener = allow_screen_content_tools ? 1 : 2;
     sf->lpf_sf.disable_loop_restoration_chroma = boosted ? 0 : 1;
     sf->lpf_sf.reduce_wiener_window_size = !boosted;
     sf->lpf_sf.prune_wiener_based_on_src_var = 2;