Simplify rd_pick_intra_sby_mode()

Change-Id: Ifb0915c94c2db48827ddbd446314cb6e3155b99c

vp9/encoder/vp9_rdopt.c

diff --git a/vp9/encoder/vp9_rdopt.c b/vp9/encoder/vp9_rdopt.c
index 37832b7..5346f7b 100644
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -825,6 +825,7 @@
   return RDCOST(mb->rdmult, mb->rddiv, cost, total_distortion);
 }
 
+// This function is used only for intra_only frames
 static int64_t rd_pick_intra_sby_mode(VP9_COMP *cpi, MACROBLOCK *x,
                                       int *rate, int *rate_tokenonly,
                                       int64_t *distortion, int *skippable,
@@ -839,7 +840,12 @@
   int64_t this_distortion, this_rd;
   TX_SIZE best_tx = TX_4X4;
   int i;
-  int *bmode_costs = cpi->mbmode_cost;
+  int *bmode_costs;
+  const MODE_INFO *above_mi = xd->mi[-xd->mi_stride].src_mi;
+  const MODE_INFO *left_mi = xd->left_available ? xd->mi[-1].src_mi : NULL;
+  const PREDICTION_MODE A = vp9_above_block_mode(mic, above_mi, 0);
+  const PREDICTION_MODE L = vp9_left_block_mode(mic, left_mi, 0);
+  bmode_costs = cpi->y_mode_costs[A][L];
 
   if (cpi->sf.tx_size_search_method == USE_FULL_RD)
     for (i = 0; i < TX_MODES; i++)
@@ -848,15 +854,6 @@
   /* Y Search for intra prediction mode */
   for (mode = DC_PRED; mode <= TM_PRED; mode++) {
     int64_t local_tx_cache[TX_MODES];
-    MODE_INFO *above_mi = xd->mi[-xd->mi_stride].src_mi;
-    MODE_INFO *left_mi = xd->left_available ? xd->mi[-1].src_mi : NULL;
-
-    if (cpi->common.frame_type == KEY_FRAME) {
-      const PREDICTION_MODE A = vp9_above_block_mode(mic, above_mi, 0);
-      const PREDICTION_MODE L = vp9_left_block_mode(mic, left_mi, 0);
-
-      bmode_costs = cpi->y_mode_costs[A][L];
-    }
     mic->mbmi.mode = mode;
 
     super_block_yrd(cpi, x, &this_rate_tokenonly, &this_distortion,