vp9 denoiser: Fix to re-evaluate mode selection.

This fix allows to enable reuse_inter_pred.

Change-Id: I53f2bf1163bb0036ffb6df92117a86debdca11d1

vp9/encoder/vp9_pickmode.c

@@ -1703,8 +1703,7 @@ void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
         decision == FILTER_BLOCK &&
         cpi->noise_estimate.enabled &&
         cpi->noise_estimate.level > kLow &&
-        zero_last_cost_orig < (best_rdc.rdcost << 2) &&
-        !reuse_inter_pred) {
+        zero_last_cost_orig < (best_rdc.rdcost << 2)) {
       // Check if we should pick ZEROMV on denoised signal.
       int rate = 0;
       int64_t dist = 0;
@@ -1713,6 +1712,7 @@ void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
       mbmi->ref_frame[1] = NONE;
       mbmi->mv[0].as_int = 0;
       mbmi->interp_filter = EIGHTTAP;
+      xd->plane[0].pre[0] = yv12_mb[LAST_FRAME][0];
       vp9_build_inter_predictors_sby(xd, mi_row, mi_col, bsize);
       model_rd_for_sb_y(cpi, bsize, x, xd, &rate, &dist, &var_y, &sse_y);
       this_rdc.rate = rate + ref_frame_cost[LAST_FRAME] +

vp9/encoder/vp9_speed_features.c

@@ -380,16 +380,6 @@ static void set_rt_speed_feature(VP9_COMP *cpi, SPEED_FEATURES *sf,
     sf->adaptive_rd_thresh = 2;
     // This feature is only enabled when partition search is disabled.
     sf->reuse_inter_pred_sby = 1;
-    // TODO(marpan): When denoising, we may re-evaluate the mode selection and
-    // this seems to cause problems when reuse_inter_pred_sby is enabled.
-    // Disabling reuse_inter_pred_sby for now (under denoising conditions), and
-    // will look into re-enabling it.
-#if CONFIG_VP9_TEMPORAL_DENOISING
-    if (cpi->oxcf.noise_sensitivity > 0 &&
-        cpi->noise_estimate.enabled &&
-        cpi->noise_estimate.level > kLow)
-      sf->reuse_inter_pred_sby = 0;
-#endif
     sf->partition_search_breakout_rate_thr = 200;
     sf->coeff_prob_appx_step = 4;
     sf->use_fast_coef_updates = is_keyframe ? TWO_LOOP : ONE_LOOP_REDUCED;