shithub: libvpx

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Merge "vp9: SVC: Rework the usage of base_mv for SVC."

--- a/vp9/encoder/vp9_pickmode.c

+++ b/vp9/encoder/vp9_pickmode.c

@@ -217,7 +217,8 @@

   }

   if (rv && search_subpel) {

-    const int subpel_force_stop = cpi->sf.mv.subpel_force_stop;

+    int subpel_force_stop = cpi->sf.mv.subpel_force_stop;

+    if (use_base_mv && cpi->sf.base_mv_aggressive) subpel_force_stop = 2;

     cpi->find_fractional_mv_step(

         x, &tmp_mv->as_mv, &ref_mv, cpi->common.allow_high_precision_mv,

         x->errorperbit, &cpi->fn_ptr[bsize], subpel_force_stop,

@@ -1489,6 +1490,7 @@

   int force_skip_low_temp_var = 0;

   int skip_ref_find_pred[4] = { 0 };

   unsigned int sse_zeromv_normalized = UINT_MAX;

+  unsigned int best_sse_sofar = UINT_MAX;

   unsigned int thresh_svc_skip_golden = 500;

 #if CONFIG_VP9_TEMPORAL_DENOISING

   VP9_PICKMODE_CTX_DEN ctx_den;

@@ -1786,17 +1788,29 @@

       } else if (svc->use_base_mv && svc->spatial_layer_id) {

         if (frame_mv[NEWMV][ref_frame].as_int != INVALID_MV) {

           const int pre_stride = xd->plane[0].pre[0].stride;

-          int base_mv_sad = INT_MAX;

-          const float base_mv_bias = sf->base_mv_aggressive ? 1.5f : 1.0f;

+          unsigned int base_mv_sse = UINT_MAX;

+          int scale = (cpi->rc.avg_frame_low_motion > 60) ? 2 : 4;

           const uint8_t *const pre_buf =

               xd->plane[0].pre[0].buf +

               (frame_mv[NEWMV][ref_frame].as_mv.row >> 3) * pre_stride +

               (frame_mv[NEWMV][ref_frame].as_mv.col >> 3);

-          base_mv_sad = cpi->fn_ptr[bsize].sdf(

-              x->plane[0].src.buf, x->plane[0].src.stride, pre_buf, pre_stride);

-

-          if (base_mv_sad < (int)(base_mv_bias * x->pred_mv_sad[ref_frame])) {

+          cpi->fn_ptr[bsize].vf(x->plane[0].src.buf, x->plane[0].src.stride,

+                                pre_buf, pre_stride, &base_mv_sse);

+          // Exit NEWMV search if base_mv_sse is large.

+          if (sf->base_mv_aggressive && base_mv_sse > (best_sse_sofar << scale))

+            continue;

+          if (base_mv_sse < (best_sse_sofar << 1)) {

             // Base layer mv is good.

+            // Exit NEWMV search if the base_mv is (0, 0) and sse is low, since

+            // (0, 0) mode is already tested.

+            unsigned int base_mv_sse_normalized =

+                base_mv_sse >>

+                (b_width_log2_lookup[bsize] + b_height_log2_lookup[bsize]);

+            if (sf->base_mv_aggressive && base_mv_sse <= best_sse_sofar &&

+                base_mv_sse_normalized < 400 &&

+                frame_mv[NEWMV][ref_frame].as_mv.row == 0 &&

+                frame_mv[NEWMV][ref_frame].as_mv.col == 0)

+              continue;

             if (!combined_motion_search(cpi, x, bsize, mi_row, mi_col,

                                         &frame_mv[NEWMV][ref_frame], &rate_mv,

                                         best_rdc.rdcost, 1)) {

@@ -1942,6 +1956,7 @@

         sse_zeromv_normalized =

             sse_y >> (b_width_log2_lookup[bsize] + b_height_log2_lookup[bsize]);

       }

+      if (sse_y < best_sse_sofar) best_sse_sofar = sse_y;

     }

     if (!this_early_term) {

--- a/vp9/encoder/vp9_speed_features.c

+++ b/vp9/encoder/vp9_speed_features.c

@@ -534,10 +534,7 @@

     if (cpi->svc.temporal_layer_id > 0) {

       sf->adaptive_rd_thresh = 4;

       sf->limit_newmv_early_exit = 0;

-      sf->base_mv_aggressive =

-          (cpi->svc.temporal_layer_id == cpi->svc.number_temporal_layers - 1)

-              ? 1

-              : 0;

+      sf->base_mv_aggressive = 1;

     }

   }

-- 

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