Skip RD search over lst 2/3 frame for non-nearest neighbor mvs
Skip the rate distortion search over last 2/3 reference frames for
the reference motion vectors derived from non-nearest neighbors.
The overall coding performance change is in the noise range - 0.05%
better. Speed up the encoding process by 20%.
Change-Id: I823b8ca2805ae332f4c9bc8ee255069a82db4331
diff --git a/av1/encoder/rdopt.c b/av1/encoder/rdopt.c
index 26f7873..53aae07 100644
--- a/av1/encoder/rdopt.c
+++ b/av1/encoder/rdopt.c
@@ -9908,6 +9908,22 @@
mbmi->ref_mv_idx = 1 + ref_idx;
+ if (cpi->sf.reduce_inter_modes) {
+ if (mbmi->ref_frame[0] == LAST2_FRAME ||
+ mbmi->ref_frame[0] == LAST3_FRAME ||
+ mbmi->ref_frame[1] == LAST2_FRAME ||
+ mbmi->ref_frame[1] == LAST3_FRAME) {
+ if (mbmi_ext
+ ->ref_mv_stack[ref_frame_type]
+ [mbmi->ref_mv_idx + idx_offset]
+ .weight < REF_CAT_LEVEL) {
+ *mbmi = backup_mbmi;
+ x->skip = backup_skip;
+ continue;
+ }
+ }
+ }
+
if (comp_pred) {
int ref_mv_idx = mbmi->ref_mv_idx;
// Special case: NEAR_NEWMV and NEW_NEARMV modes use
diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index 1bb9fcf..809bc8f 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -140,6 +140,9 @@
AV1_COMMON *const cm = &cpi->common;
const int boosted = frame_is_boosted(cpi);
+ // Speed 0 for all speed features that give neutral coding performance change.
+ sf->reduce_inter_modes = 1;
+
if (speed >= 1) {
sf->selective_ref_frame = 1;
sf->tx_size_search_init_depth_rect = 1;
@@ -452,6 +455,7 @@
sf->tx_size_search_method = USE_FULL_RD;
sf->tx_size_search_init_depth_sqr = 0;
sf->tx_size_search_init_depth_rect = 0;
+ sf->reduce_inter_modes = 0;
sf->adaptive_motion_search = 0;
sf->adaptive_pred_interp_filter = 0;
sf->adaptive_mode_search = 0;
diff --git a/av1/encoder/speed_features.h b/av1/encoder/speed_features.h
index 66128a1..45b18dc 100644
--- a/av1/encoder/speed_features.h
+++ b/av1/encoder/speed_features.h
@@ -300,6 +300,9 @@
// adds overhead.
int static_segmentation;
+ // Limit the inter mode tested in the RD loop
+ int reduce_inter_modes;
+
// If 1 we iterate finding a best reference for 2 ref frames together - via
// a log search that iterates 4 times (check around mv for last for best
// error of combined predictor then check around mv for alt). If 0 we
