Remove some unused code related to macroblock/splitmv coding.

Change-Id: Ic40d56fb162f4e201547dfae33e62ccd9e865889

vp9/common/vp9_entropymode.c

diff --git a/vp9/common/vp9_entropymode.c b/vp9/common/vp9_entropymode.c
index 622f1dc..9c390df 100644
--- a/vp9/common/vp9_entropymode.c
+++ b/vp9/common/vp9_entropymode.c
@@ -141,13 +141,6 @@
   -H_PRED, -TM_PRED
 };
 
-const vp9_tree_index vp9_mv_ref_tree[8] = {
-  -ZEROMV, 2,
-  -NEARESTMV, 4,
-  -NEARMV, 6,
-  -NEWMV, -SPLITMV
-};
-
 const vp9_tree_index vp9_sb_mv_ref_tree[6] = {
   -ZEROMV, 2,
   -NEARESTMV, 4,
@@ -168,7 +161,6 @@
 struct vp9_token vp9_kf_ymode_encodings[VP9_YMODES];
 struct vp9_token vp9_uv_mode_encodings[VP9_UV_MODES];
 
-struct vp9_token vp9_mv_ref_encoding_array[VP9_MVREFS];
 struct vp9_token vp9_sb_mv_ref_encoding_array[VP9_MVREFS];
 
 struct vp9_token vp9_partition_encodings[PARTITION_TYPES];
@@ -265,8 +257,6 @@
                        vp9_switchable_interp_tree);
   vp9_tokens_from_tree(vp9_partition_encodings, vp9_partition_tree);
 
-  vp9_tokens_from_tree_offset(vp9_mv_ref_encoding_array,
-                              vp9_mv_ref_tree, NEARESTMV);
   vp9_tokens_from_tree_offset(vp9_sb_mv_ref_encoding_array,
                               vp9_sb_mv_ref_tree, NEARESTMV);
 }

vp9/common/vp9_entropymode.h

diff --git a/vp9/common/vp9_entropymode.h b/vp9/common/vp9_entropymode.h
index 8fbc6f2..7a83c70 100644
--- a/vp9/common/vp9_entropymode.h
+++ b/vp9/common/vp9_entropymode.h
@@ -29,9 +29,7 @@
 extern const vp9_tree_index  vp9_uv_mode_tree[];
 #define vp9_sb_ymode_tree vp9_uv_mode_tree
 #define vp9_sb_kf_ymode_tree vp9_uv_mode_tree
-extern const vp9_tree_index  vp9_mv_ref_tree[];
 extern const vp9_tree_index  vp9_sb_mv_ref_tree[];
-extern const vp9_tree_index  vp9_sub_mv_ref_tree[];
 
 extern struct vp9_token vp9_bmode_encodings[VP9_BINTRAMODES];
 extern struct vp9_token vp9_kf_bmode_encodings[VP9_BINTRAMODES];
@@ -43,7 +41,6 @@
 
 /* Inter mode values do not start at zero */
 
-extern struct vp9_token vp9_mv_ref_encoding_array[VP9_MVREFS];
 extern struct vp9_token vp9_sb_mv_ref_encoding_array[VP9_MVREFS];
 
 // probability models for partition information

vp9/decoder/vp9_decodemv.c

diff --git a/vp9/decoder/vp9_decodemv.c b/vp9/decoder/vp9_decodemv.c
index 6b511b5..813a26c 100644
--- a/vp9/decoder/vp9_decodemv.c
+++ b/vp9/decoder/vp9_decodemv.c
@@ -362,10 +362,6 @@
   return (MB_PREDICTION_MODE) treed_read(r, vp9_sb_mv_ref_tree, p);
 }
 
-static MB_PREDICTION_MODE read_mv_ref(vp9_reader *r, const vp9_prob *p) {
-  return (MB_PREDICTION_MODE) treed_read(r, vp9_mv_ref_tree, p);
-}
-
 #ifdef VPX_MODE_COUNT
 unsigned int vp9_mv_cont_count[5][4] = {
   { 0, 0, 0, 0 },

vp9/encoder/vp9_bitstream.c

diff --git a/vp9/encoder/vp9_bitstream.c b/vp9/encoder/vp9_bitstream.c
index 1dd822b..f296d96 100644
--- a/vp9/encoder/vp9_bitstream.c
+++ b/vp9/encoder/vp9_bitstream.c
@@ -524,15 +524,6 @@
   *tp = p;
 }
 
-static void write_mv_ref(vp9_writer *bc, MB_PREDICTION_MODE m,
-                         const vp9_prob *p) {
-#if CONFIG_DEBUG
-  assert(NEARESTMV <= m  &&  m <= SPLITMV);
-#endif
-  write_token(bc, vp9_mv_ref_tree, p,
-              vp9_mv_ref_encoding_array - NEARESTMV + m);
-}
-
 static void write_sb_mv_ref(vp9_writer *bc, MB_PREDICTION_MODE m,
                             const vp9_prob *p) {
 #if CONFIG_DEBUG

vp9/encoder/vp9_rdopt.c

diff --git a/vp9/encoder/vp9_rdopt.c b/vp9/encoder/vp9_rdopt.c
index 2eb3f9b..72c4308 100644
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -927,8 +927,8 @@
     vp9_prob p [VP9_MVREFS - 1];
     assert(NEARESTMV <= m  &&  m <= SPLITMV);
     vp9_mv_ref_probs(pc, p, mode_context);
-    return cost_token(vp9_mv_ref_tree, p,
-                      vp9_mv_ref_encoding_array - NEARESTMV + m);
+    return cost_token(vp9_sb_mv_ref_tree, p,
+                      vp9_sb_mv_ref_encoding_array - NEARESTMV + m);
   } else
     return 0;
 }