Revert r97185 "Update libvpx snapshot to v0.9.7-p1 (Cayuga)."

libvpx/source/libvpx/vp8/common/findnearmv.h

Index: libvpx/source/libvpx/vp8/common/findnearmv.h
diff --git a/libvpx/source/libvpx/vp8/common/findnearmv.h b/libvpx/source/libvpx/vp8/common/findnearmv.h
index c142a04151fb7c2c2cfc752788c23f646c1fd3ba..bdf9eca8858a8db3a71de47311b82147a99ba6a2 100644
--- a/libvpx/source/libvpx/vp8/common/findnearmv.h
+++ b/libvpx/source/libvpx/vp8/common/findnearmv.h
@@ -17,6 +17,11 @@
 #include "modecont.h"
 #include "treecoder.h"
 
+typedef union
+{
+    unsigned int as_int;
+    MV           as_mv;
+} int_mv;        /* facilitates rapid equality tests */
 
 static void mv_bias(int refmb_ref_frame_sign_bias, int refframe, int_mv *mvp, const int *ref_frame_sign_bias)
 {
@@ -34,48 +39,24 @@ static void mv_bias(int refmb_ref_frame_sign_bias, int refframe, int_mv *mvp, co
 
 #define LEFT_TOP_MARGIN (16 << 3)
 #define RIGHT_BOTTOM_MARGIN (16 << 3)
-static void vp8_clamp_mv2(int_mv *mv, const MACROBLOCKD *xd)
+static void vp8_clamp_mv(MV *mv, const MACROBLOCKD *xd)
 {
-    if (mv->as_mv.col < (xd->mb_to_left_edge - LEFT_TOP_MARGIN))
-        mv->as_mv.col = xd->mb_to_left_edge - LEFT_TOP_MARGIN;
-    else if (mv->as_mv.col > xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN)
-        mv->as_mv.col = xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN;
-
-    if (mv->as_mv.row < (xd->mb_to_top_edge - LEFT_TOP_MARGIN))
-        mv->as_mv.row = xd->mb_to_top_edge - LEFT_TOP_MARGIN;
-    else if (mv->as_mv.row > xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN)
-        mv->as_mv.row = xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN;
-}
-
-static void vp8_clamp_mv(int_mv *mv, int mb_to_left_edge, int mb_to_right_edge,
-                         int mb_to_top_edge, int mb_to_bottom_edge)
-{
-    mv->as_mv.col = (mv->as_mv.col < mb_to_left_edge) ?
-        mb_to_left_edge : mv->as_mv.col;
-    mv->as_mv.col = (mv->as_mv.col > mb_to_right_edge) ?
-        mb_to_right_edge : mv->as_mv.col;
-    mv->as_mv.row = (mv->as_mv.row < mb_to_top_edge) ?
-        mb_to_top_edge : mv->as_mv.row;
-    mv->as_mv.row = (mv->as_mv.row > mb_to_bottom_edge) ?
-        mb_to_bottom_edge : mv->as_mv.row;
-}
-static unsigned int vp8_check_mv_bounds(int_mv *mv, int mb_to_left_edge,
-                                int mb_to_right_edge, int mb_to_top_edge,
-                                int mb_to_bottom_edge)
-{
-    unsigned int need_to_clamp;
-    need_to_clamp = (mv->as_mv.col < mb_to_left_edge) ? 1 : 0;
-    need_to_clamp |= (mv->as_mv.col > mb_to_right_edge) ? 1 : 0;
-    need_to_clamp |= (mv->as_mv.row < mb_to_top_edge) ? 1 : 0;
-    need_to_clamp |= (mv->as_mv.row > mb_to_bottom_edge) ? 1 : 0;
-    return need_to_clamp;
+    if (mv->col < (xd->mb_to_left_edge - LEFT_TOP_MARGIN))
+        mv->col = xd->mb_to_left_edge - LEFT_TOP_MARGIN;
+    else if (mv->col > xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN)
+        mv->col = xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN;
+
+    if (mv->row < (xd->mb_to_top_edge - LEFT_TOP_MARGIN))
+        mv->row = xd->mb_to_top_edge - LEFT_TOP_MARGIN;
+    else if (mv->row > xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN)
+        mv->row = xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN;
 }
 
 void vp8_find_near_mvs
 (
     MACROBLOCKD *xd,
     const MODE_INFO *here,
-    int_mv *nearest, int_mv *nearby, int_mv *best,
+    MV *nearest, MV *nearby, MV *best,
     int near_mv_ref_cts[4],
     int refframe,
     int *ref_frame_sign_bias
@@ -85,89 +66,10 @@ vp8_prob *vp8_mv_ref_probs(
     vp8_prob p[VP8_MVREFS-1], const int near_mv_ref_ct[4]
 );
 
-extern const unsigned char vp8_mbsplit_offset[4][16];
-
-
-static int left_block_mv(const MODE_INFO *cur_mb, int b)
-{
-    if (!(b & 3))
-    {
-        /* On L edge, get from MB to left of us */
-        --cur_mb;
-
-        if(cur_mb->mbmi.mode != SPLITMV)
-            return cur_mb->mbmi.mv.as_int;
-        b += 4;
-    }
-
-    return (cur_mb->bmi + b - 1)->mv.as_int;
-}
-
-static int above_block_mv(const MODE_INFO *cur_mb, int b, int mi_stride)
-{
-    if (!(b >> 2))
-    {
-        /* On top edge, get from MB above us */
-        cur_mb -= mi_stride;
+const B_MODE_INFO *vp8_left_bmi(const MODE_INFO *cur_mb, int b);
 
-        if(cur_mb->mbmi.mode != SPLITMV)
-            return cur_mb->mbmi.mv.as_int;
-        b += 16;
-    }
+const B_MODE_INFO *vp8_above_bmi(const MODE_INFO *cur_mb, int b, int mi_stride);
 
-    return (cur_mb->bmi + b - 4)->mv.as_int;
-}
-static B_PREDICTION_MODE left_block_mode(const MODE_INFO *cur_mb, int b)
-{
-    if (!(b & 3))
-    {
-        /* On L edge, get from MB to left of us */
-        --cur_mb;
-        switch (cur_mb->mbmi.mode)
-        {
-            case B_PRED:
-              return (cur_mb->bmi + b + 3)->as_mode;
-            case DC_PRED:
-                return B_DC_PRED;
-            case V_PRED:
-                return B_VE_PRED;
-            case H_PRED:
-                return B_HE_PRED;
-            case TM_PRED:
-                return B_TM_PRED;
-            default:
-                return B_DC_PRED;
-        }
-    }
-
-    return (cur_mb->bmi + b - 1)->as_mode;
-}
-
-static B_PREDICTION_MODE above_block_mode(const MODE_INFO *cur_mb, int b, int mi_stride)
-{
-    if (!(b >> 2))
-    {
-        /* On top edge, get from MB above us */
-        cur_mb -= mi_stride;
-
-        switch (cur_mb->mbmi.mode)
-        {
-            case B_PRED:
-              return (cur_mb->bmi + b + 12)->as_mode;
-            case DC_PRED:
-                return B_DC_PRED;
-            case V_PRED:
-                return B_VE_PRED;
-            case H_PRED:
-                return B_HE_PRED;
-            case TM_PRED:
-                return B_TM_PRED;
-            default:
-                return B_DC_PRED;
-        }
-    }
-
-    return (cur_mb->bmi + b - 4)->as_mode;
-}
+extern const unsigned char vp8_mbsplit_offset[4][16];
 
 #endif