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Refactor ml_predict_var_rd_paritioning()

Refactor out code about simple motion search.

Change-Id: Ie6895db2aff3c13e7a45554d6bc1c7c0af8f2d51

--- a/vp9/encoder/vp9_encodeframe.c

+++ b/vp9/encoder/vp9_encodeframe.c

@@ -3440,6 +3440,45 @@

 #undef FEATURES

 #undef LABELS

+// Perform fast and coarse motion search for the given block. This is a

+// pre-processing step for the ML based partition search speedup.

+static void simple_motion_search(VP9_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize,

+                                 int mi_row, int mi_col, MV ref_mv,

+                                 MV_REFERENCE_FRAME ref, uint8_t *pred_buf) {

+  VP9_COMMON *const cm = &cpi->common;

+  MACROBLOCKD *const xd = &x->e_mbd;

+  MODE_INFO *const mi = xd->mi[0];

+  const YV12_BUFFER_CONFIG *const yv12 = get_ref_frame_buffer(cpi, ref);

+  const int step_param = 1;

+  const MvLimits tmp_mv_limits = x->mv_limits;

+  const SEARCH_METHODS search_method = NSTEP;

+  const int sadpb = x->sadperbit16;

+  MV ref_mv_full = { ref_mv.row >> 3, ref_mv.col >> 3 };

+  MV best_mv = { 0, 0 };

+  int cost_list[5];

+

+  assert(yv12 != NULL);

+  if (!yv12) return;

+  vp9_setup_pre_planes(xd, 0, yv12, mi_row, mi_col,

+                       &cm->frame_refs[ref - 1].sf);

+  mi->ref_frame[0] = ref;

+  mi->ref_frame[1] = NONE;

+  mi->sb_type = bsize;

+  vp9_set_mv_search_range(&x->mv_limits, &ref_mv);

+  vp9_full_pixel_search(cpi, x, bsize, &ref_mv_full, step_param, search_method,

+                        sadpb, cond_cost_list(cpi, cost_list), &ref_mv,

+                        &best_mv, 0, 0);

+  best_mv.row *= 8;

+  best_mv.col *= 8;

+  x->mv_limits = tmp_mv_limits;

+  mi->mv[0].as_mv = best_mv;

+

+  set_ref_ptrs(cm, xd, mi->ref_frame[0], mi->ref_frame[1]);

+  xd->plane[0].dst.buf = pred_buf;

+  xd->plane[0].dst.stride = 64;

+  vp9_build_inter_predictors_sby(xd, mi_row, mi_col, bsize);

+}

+

 // Use a neural net model to prune partition-none and partition-split search.

 // The model uses prediction residue variance and quantization step size as

 // input features.

@@ -3448,10 +3487,9 @@

                                           BLOCK_SIZE bsize, int mi_row,

                                           int mi_col, int *none, int *split) {

   VP9_COMMON *const cm = &cpi->common;

-  MACROBLOCKD *xd = &x->e_mbd;

-  MODE_INFO *mi = xd->mi[0];

   const NN_CONFIG *nn_config = NULL;

 #if CONFIG_VP9_HIGHBITDEPTH

+  MACROBLOCKD *xd = &x->e_mbd;

   DECLARE_ALIGNED(16, uint8_t, pred_buffer[64 * 64 * 2]);

   uint8_t *const pred_buf = (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)

                                 ? (CONVERT_TO_BYTEPTR(pred_buffer))

@@ -3489,41 +3527,13 @@

   if (!nn_config) return;

-  mi->ref_frame[1] = NONE;

-  mi->sb_type = bsize;

   // Do a simple single motion search to find a prediction for current block.

   // The variance of the residue will be used as input features.

   {

+    const MV ref_mv = { 0, 0 };

     const MV_REFERENCE_FRAME ref =

         cpi->rc.is_src_frame_alt_ref ? ALTREF_FRAME : LAST_FRAME;

-    YV12_BUFFER_CONFIG *yv12 = get_ref_frame_buffer(cpi, ref);

-    MV ref_mv = { 0, 0 };

-    MV ref_mv_full = { 0, 0 };

-    const int step_param = 1;

-    const MvLimits tmp_mv_limits = x->mv_limits;

-    const SEARCH_METHODS search_method = NSTEP;

-    const int sadpb = x->sadperbit16;

-    MV best_mv = { 0, 0 };

-    int cost_list[5];

-

-    assert(yv12 != NULL);

-    if (!yv12) return;

-    vp9_setup_pre_planes(xd, 0, yv12, mi_row, mi_col,

-                         &cm->frame_refs[ref - 1].sf);

-    mi->ref_frame[0] = ref;

-    vp9_set_mv_search_range(&x->mv_limits, &ref_mv);

-    vp9_full_pixel_search(cpi, x, bsize, &ref_mv_full, step_param,

-                          search_method, sadpb, cond_cost_list(cpi, cost_list),

-                          &ref_mv, &best_mv, 0, 0);

-    best_mv.row *= 8;

-    best_mv.col *= 8;

-    x->mv_limits = tmp_mv_limits;

-    mi->mv[0].as_mv = best_mv;

-

-    set_ref_ptrs(cm, xd, mi->ref_frame[0], mi->ref_frame[1]);

-    xd->plane[0].dst.buf = pred_buf;

-    xd->plane[0].dst.stride = 64;

-    vp9_build_inter_predictors_sby(xd, mi_row, mi_col, bsize);

+    simple_motion_search(cpi, x, bsize, mi_row, mi_col, ref_mv, ref, pred_buf);

   }

   vpx_clear_system_state();