Cleanup: reusing clamp_mv function.

Change-Id: I8715f08a3554bdb557c5f935f1dfbd671f18e766

vp9/common/vp9_findnearmv.h

@@ -29,12 +29,6 @@ void vp9_find_best_ref_mvs(MACROBLOCKD *xd,
                            int_mv *near);
 
 // TODO(jingning): this mv clamping function should be block size dependent.
-static void clamp_mv(MV *mv, int min_col, int max_col,
-                             int min_row, int max_row) {
-  mv->col = clamp(mv->col, min_col, max_col);
-  mv->row = clamp(mv->row, min_row, max_row);
-}
-
 static void clamp_mv2(MV *mv, const MACROBLOCKD *xd) {
   clamp_mv(mv, xd->mb_to_left_edge - LEFT_TOP_MARGIN,
                xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN,

vp9/common/vp9_mv.h

@@ -13,6 +13,8 @@
 
 #include "vpx/vpx_integer.h"
 
+#include "vp9/common/vp9_common.h"
+
 typedef struct {
   int16_t row;
   int16_t col;
@@ -28,4 +30,10 @@ typedef struct {
   int32_t col;
 } MV32;
 
+static void clamp_mv(MV *mv, int min_col, int max_col,
+                             int min_row, int max_row) {
+  mv->col = clamp(mv->col, min_col, max_col);
+  mv->row = clamp(mv->row, min_row, max_row);
+}
+
 #endif  // VP9_COMMON_VP9_MV_H_

vp9/common/vp9_mvref_common.c

@@ -43,10 +43,10 @@ static const int mv_ref_blocks[BLOCK_SIZE_TYPES][MVREF_NEIGHBOURS][2] = {
 #define MV_BORDER (16 << 3) // Allow 16 pels in 1/8th pel units
 
 static void clamp_mv_ref(const MACROBLOCKD *xd, int_mv *mv) {
-  mv->as_mv.col = clamp(mv->as_mv.col, xd->mb_to_left_edge - MV_BORDER,
-                                       xd->mb_to_right_edge + MV_BORDER);
-  mv->as_mv.row = clamp(mv->as_mv.row, xd->mb_to_top_edge - MV_BORDER,
-                                       xd->mb_to_bottom_edge + MV_BORDER);
+  clamp_mv(&mv->as_mv, xd->mb_to_left_edge - MV_BORDER,
+                       xd->mb_to_right_edge + MV_BORDER,
+                       xd->mb_to_top_edge - MV_BORDER,
+                       xd->mb_to_bottom_edge + MV_BORDER);
 }
 
 // Gets a candidate reference motion vector from the given mode info

vp9/common/vp9_reconinter.c

@@ -239,24 +239,25 @@ MV clamp_mv_to_umv_border_sb(const MV *src_mv,
     int bwl, int bhl, int ss_x, int ss_y,
     int mb_to_left_edge, int mb_to_top_edge,
     int mb_to_right_edge, int mb_to_bottom_edge) {
-  /* If the MV points so far into the UMV border that no visible pixels
-   * are used for reconstruction, the subpel part of the MV can be
-   * discarded and the MV limited to 16 pixels with equivalent results.
-   */
+  // If the MV points so far into the UMV border that no visible pixels
+  // are used for reconstruction, the subpel part of the MV can be
+  // discarded and the MV limited to 16 pixels with equivalent results.
   const int spel_left = (VP9_INTERP_EXTEND + (4 << bwl)) << 4;
   const int spel_right = spel_left - (1 << 4);
   const int spel_top = (VP9_INTERP_EXTEND + (4 << bhl)) << 4;
   const int spel_bottom = spel_top - (1 << 4);
-  MV clamped_mv;
-
+  MV clamped_mv = {
+    src_mv->row << (1 - ss_y),
+    src_mv->col << (1 - ss_x)
+  };
   assert(ss_x <= 1);
   assert(ss_y <= 1);
-  clamped_mv.col = clamp(src_mv->col << (1 - ss_x),
-                         (mb_to_left_edge << (1 - ss_x)) - spel_left,
-                         (mb_to_right_edge << (1 - ss_x)) + spel_right);
-  clamped_mv.row = clamp(src_mv->row << (1 - ss_y),
-                         (mb_to_top_edge << (1 - ss_y)) - spel_top,
-                         (mb_to_bottom_edge << (1 - ss_y)) + spel_bottom);
+
+  clamp_mv(&clamped_mv, (mb_to_left_edge << (1 - ss_x)) - spel_left,
+                        (mb_to_right_edge << (1 - ss_x)) + spel_right,
+                        (mb_to_top_edge << (1 - ss_y)) - spel_top,
+                        (mb_to_bottom_edge << (1 - ss_y)) + spel_bottom);
+
   return clamped_mv;
 }