Merge set_prev_mi function into encoder function.

Change-Id: Ifcf2efbb232ea4cabcdebbe77e0820d121e4a6da

vp9/common/vp9_onyxc_int.h

@@ -311,17 +311,6 @@ static INLINE void set_mi_row_col(MACROBLOCKD *xd, const TileInfo *const tile,
   xd->left_available  = (mi_col > tile->mi_col_start);
 }
 
-static INLINE void set_prev_mi(VP9_COMMON *cm) {
-  const int use_prev_in_find_mv_refs = cm->width == cm->last_width &&
-                                       cm->height == cm->last_height &&
-                                       !cm->intra_only &&
-                                       cm->last_show_frame;
-  // Special case: set prev_mi to NULL when the previous mode info
-  // context cannot be used.
-  cm->prev_mi = use_prev_in_find_mv_refs ?
-                  cm->prev_mip + cm->mi_stride + 1 : NULL;
-}
-
 static INLINE void update_partition_context(MACROBLOCKD *xd,
                                             int mi_row, int mi_col,
                                             BLOCK_SIZE subsize,

vp9/encoder/vp9_encodeframe.c

@@ -3627,12 +3627,15 @@ static void encode_frame_internal(VP9_COMP *cpi) {
   vp9_initialize_rd_consts(cpi);
   vp9_initialize_me_consts(cpi, cm->base_qindex);
   init_encode_frame_mb_context(cpi);
-  set_prev_mi(cm);
   cm->use_prev_frame_mvs = !cm->error_resilient_mode &&
                            cm->width == cm->last_width &&
                            cm->height == cm->last_height &&
                            !cm->intra_only &&
                            cm->last_show_frame;
+  // Special case: set prev_mi to NULL when the previous mode info
+  // context cannot be used.
+  cm->prev_mi = cm->use_prev_frame_mvs ?
+                  cm->prev_mip + cm->mi_stride + 1 : NULL;
 
   x->quant_fp = cpi->sf.use_quant_fp;
   vp9_zero(x->skip_txfm);