3 files changed, 8 insertions, 0 deletions
diff --git a/vp9/encoder/vp9_pickmode.c b/vp9/encoder/vp9_pickmode.c
index 3d398edc9..699e70784 100644
--- a/vp9/encoder/vp9_pickmode.c
+++ b/vp9/encoder/vp9_pickmode.c
@@ -238,6 +238,9 @@ int64_t vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
   // Mode index conversion form THR_MODES to MB_PREDICTION_MODE for a ref frame.
   int mode_idx[MB_MODE_COUNT] = {0};
   INTERP_FILTER filter_ref = SWITCHABLE;
+  int bsl = mi_width_log2_lookup[bsize];
+  int pred_filter_search = (((mi_row + mi_col) >> bsl) +
+                            cpi->sf.chessboard_index) & 0x01;
 
   x->skip_encode = cpi->sf.skip_encode_frame && x->q_index < QIDX_SKIP_THRESH;
 
@@ -338,6 +341,7 @@ int64_t vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
       // motion vector is at sub-pixel accuracy level for luma component, i.e.,
       // the last three bits are all zeros.
       if ((this_mode == NEWMV || filter_ref == SWITCHABLE) &&
+          pred_filter_search &&
           ((mbmi->mv[0].as_mv.row & 0x07) != 0 ||
            (mbmi->mv[0].as_mv.col & 0x07) != 0)) {
         int64_t tmp_rdcost1 = INT64_MAX;
diff --git a/vp9/encoder/vp9_speed_features.c b/vp9/encoder/vp9_speed_features.c
index 86ab7dcad..96916c2e1 100644
--- a/vp9/encoder/vp9_speed_features.c
+++ b/vp9/encoder/vp9_speed_features.c
@@ -269,6 +269,7 @@ static void set_rt_speed_feature(VP9_COMMON *cm, SPEED_FEATURES *sf,
     sf->use_nonrd_pick_mode = 1;
     sf->search_method = FAST_DIAMOND;
     sf->allow_skip_recode = 0;
+    sf->chessboard_index = cm->current_video_frame & 0x01;
   }
 
   if (speed >= 6) {
diff --git a/vp9/encoder/vp9_speed_features.h b/vp9/encoder/vp9_speed_features.h
index 55422979a..cff99a6dc 100644
--- a/vp9/encoder/vp9_speed_features.h
+++ b/vp9/encoder/vp9_speed_features.h
@@ -274,6 +274,9 @@ typedef struct {
   // encoding process for RTC.
   int partition_check;
 
+  // Chessboard pattern index
+  int chessboard_index;
+
   // Use finer quantizer in every other few frames that run variable block
   // partition type search.
   int force_frame_boost;