commit 1f4cc7d989a71657426c1d28efe7ae1afdea409d
author Yunqing Wang <yunqingwang@google.com> Thu Sep 10 21:41:06 2020 -0700
committer Yunqing Wang <yunqingwang@google.com> Tue Sep 15 23:25:42 2020 +0000
tree 691cb449ff6154c79ae7b1ce21e3766e28e9bce2
parent a128fe458e6b817fdb1009f215c41a23ac563468

Speed lowres and midres high quality encoding

While q_index was low, sped up lowres/midres encoding.

Borg test result at speed 0 showed a speed/quality tradeoff of 100 to 1.
       avg_psnr:  ovr_psnr:  ssim:  speedup:
lowres: 0.135     0.128      0.083   13.9
midres: 0.097     0.095      0.078    9.8

STATS_CHANGED

Change-Id: I2dafc7b4e90f941259c8da01f6f7f742f590aa79

av1/encoder/speed_features.c

diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index dc07fc6..c88c8c0 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -1412,8 +1412,21 @@
   const int boosted = frame_is_boosted(cpi);
   const int is_720p_or_larger = AOMMIN(cm->width, cm->height) >= 720;
   const int is_1080p_or_larger = AOMMIN(cm->width, cm->height) >= 1080;
-  if (is_720p_or_larger && cpi->oxcf.mode == GOOD && speed == 0) {
-    if (cm->quant_params.base_qindex <= 108) {
+  const int is_arf2_bwd_type =
+      cpi->gf_group.update_type[cpi->gf_group.index] == INTNL_ARF_UPDATE;
+
+  if (cpi->oxcf.mode == GOOD && speed == 0) {
+    // qindex_thresh for resolution < 720p
+    const int qindex_thresh = boosted ? 70 : (is_arf2_bwd_type ? 110 : 140);
+    if (!is_720p_or_larger && cm->quant_params.base_qindex <= qindex_thresh) {
+      sf->inter_sf.skip_repeated_newmv = 1;
+      sf->part_sf.simple_motion_search_split =
+          cm->features.allow_screen_content_tools ? 1 : 2;
+      sf->part_sf.simple_motion_search_early_term_none = 1;
+      sf->tx_sf.model_based_prune_tx_search_level = 0;
+    }
+
+    if (is_720p_or_larger && cm->quant_params.base_qindex <= 108) {
       sf->rd_sf.perform_coeff_opt = 2 + is_1080p_or_larger;
       memcpy(winner_mode_params->coeff_opt_dist_threshold,
              coeff_opt_dist_thresholds[sf->rd_sf.perform_coeff_opt],
@@ -1431,8 +1444,6 @@
         sf->rd_sf.tx_domain_dist_level = boosted ? 1 : 2;
         sf->rd_sf.tx_domain_dist_thres_level = 1;
         sf->part_sf.simple_motion_search_early_term_none = 1;
-        sf->part_sf.simple_motion_search_split =
-            cm->features.allow_screen_content_tools ? 1 : 2;
         sf->tx_sf.tx_type_search.ml_tx_split_thresh = 4000;
         sf->interp_sf.cb_pred_filter_search = 0;
         sf->tx_sf.tx_type_search.prune_2d_txfm_mode = TX_TYPE_PRUNE_2;