Move libvpx from DEPS to src

third_party/libvpx/source/libvpx/vp8/common/findnearmv.c

Index: third_party/libvpx/source/libvpx/vp8/common/findnearmv.c
diff --git a/third_party/libvpx/source/libvpx/vp8/common/findnearmv.c b/third_party/libvpx/source/libvpx/vp8/common/findnearmv.c
new file mode 100644
index 0000000000000000000000000000000000000000..e8ee40f56c6d1a5349d256c07c0f845c4c74c379
--- /dev/null
+++ b/third_party/libvpx/source/libvpx/vp8/common/findnearmv.c
@@ -0,0 +1,193 @@
+/*
+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+
+#include "findnearmv.h"
+
+const unsigned char vp8_mbsplit_offset[4][16] = {
+    { 0,  8,  0,  0,  0,  0,  0,  0,  0,  0,   0,  0,  0,  0,  0,  0},
+    { 0,  2,  0,  0,  0,  0,  0,  0,  0,  0,   0,  0,  0,  0,  0,  0},
+    { 0,  2,  8, 10,  0,  0,  0,  0,  0,  0,   0,  0,  0,  0,  0,  0},
+    { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15}
+};
+
+/* Predict motion vectors using those from already-decoded nearby blocks.
+   Note that we only consider one 4x4 subblock from each candidate 16x16
+   macroblock.   */
+void vp8_find_near_mvs
+(
+    MACROBLOCKD *xd,
+    const MODE_INFO *here,
+    int_mv *nearest,
+    int_mv *nearby,
+    int_mv *best_mv,
+    int cnt[4],
+    int refframe,
+    int *ref_frame_sign_bias
+)
+{
+    const MODE_INFO *above = here - xd->mode_info_stride;
+    const MODE_INFO *left = here - 1;
+    const MODE_INFO *aboveleft = above - 1;
+    int_mv            near_mvs[4];
+    int_mv           *mv = near_mvs;
+    int             *cntx = cnt;
+    enum {CNT_INTRA, CNT_NEAREST, CNT_NEAR, CNT_SPLITMV};
+
+    /* Zero accumulators */
+    mv[0].as_int = mv[1].as_int = mv[2].as_int = 0;
+    cnt[0] = cnt[1] = cnt[2] = cnt[3] = 0;
+
+    /* Process above */
+    if (above->mbmi.ref_frame != INTRA_FRAME)
+    {
+        if (above->mbmi.mv.as_int)
+        {
+            (++mv)->as_int = above->mbmi.mv.as_int;
+            mv_bias(ref_frame_sign_bias[above->mbmi.ref_frame], refframe, mv, ref_frame_sign_bias);
+            ++cntx;
+        }
+
+        *cntx += 2;
+    }
+
+    /* Process left */
+    if (left->mbmi.ref_frame != INTRA_FRAME)
+    {
+        if (left->mbmi.mv.as_int)
+        {
+            int_mv this_mv;
+
+            this_mv.as_int = left->mbmi.mv.as_int;
+            mv_bias(ref_frame_sign_bias[left->mbmi.ref_frame], refframe, &this_mv, ref_frame_sign_bias);
+
+            if (this_mv.as_int != mv->as_int)
+            {
+                (++mv)->as_int = this_mv.as_int;
+                ++cntx;
+            }
+
+            *cntx += 2;
+        }
+        else
+            cnt[CNT_INTRA] += 2;
+    }
+
+    /* Process above left */
+    if (aboveleft->mbmi.ref_frame != INTRA_FRAME)
+    {
+        if (aboveleft->mbmi.mv.as_int)
+        {
+            int_mv this_mv;
+
+            this_mv.as_int = aboveleft->mbmi.mv.as_int;
+            mv_bias(ref_frame_sign_bias[aboveleft->mbmi.ref_frame], refframe, &this_mv, ref_frame_sign_bias);
+
+            if (this_mv.as_int != mv->as_int)
+            {
+                (++mv)->as_int = this_mv.as_int;
+                ++cntx;
+            }
+
+            *cntx += 1;
+        }
+        else
+            cnt[CNT_INTRA] += 1;
+    }
+
+    /* If we have three distinct MV's ... */
+    if (cnt[CNT_SPLITMV])
+    {
+        /* See if above-left MV can be merged with NEAREST */
+        if (mv->as_int == near_mvs[CNT_NEAREST].as_int)
+            cnt[CNT_NEAREST] += 1;
+    }
+
+    cnt[CNT_SPLITMV] = ((above->mbmi.mode == SPLITMV)
+                        + (left->mbmi.mode == SPLITMV)) * 2
+                       + (aboveleft->mbmi.mode == SPLITMV);
+
+    /* Swap near and nearest if necessary */
+    if (cnt[CNT_NEAR] > cnt[CNT_NEAREST])
+    {
+        int tmp;
+        tmp = cnt[CNT_NEAREST];
+        cnt[CNT_NEAREST] = cnt[CNT_NEAR];
+        cnt[CNT_NEAR] = tmp;
+        tmp = near_mvs[CNT_NEAREST].as_int;
+        near_mvs[CNT_NEAREST].as_int = near_mvs[CNT_NEAR].as_int;
+        near_mvs[CNT_NEAR].as_int = tmp;
+    }
+
+    /* Use near_mvs[0] to store the "best" MV */
+    if (cnt[CNT_NEAREST] >= cnt[CNT_INTRA])
+        near_mvs[CNT_INTRA] = near_mvs[CNT_NEAREST];
+
+    /* Set up return values */
+    best_mv->as_int = near_mvs[0].as_int;
+    nearest->as_int = near_mvs[CNT_NEAREST].as_int;
+    nearby->as_int = near_mvs[CNT_NEAR].as_int;
+}
+
+
+static void invert_and_clamp_mvs(int_mv *inv, int_mv *src, MACROBLOCKD *xd)
+{
+    inv->as_mv.row = src->as_mv.row * -1;
+    inv->as_mv.col = src->as_mv.col * -1;
+    vp8_clamp_mv2(inv, xd);
+    vp8_clamp_mv2(src, xd);
+}
+
+
+int vp8_find_near_mvs_bias
+(
+    MACROBLOCKD *xd,
+    const MODE_INFO *here,
+    int_mv mode_mv_sb[2][MB_MODE_COUNT],
+    int_mv best_mv_sb[2],
+    int cnt[4],
+    int refframe,
+    int *ref_frame_sign_bias
+)
+{
+    int sign_bias = ref_frame_sign_bias[refframe];
+
+    vp8_find_near_mvs(xd,
+                      here,
+                      &mode_mv_sb[sign_bias][NEARESTMV],
+                      &mode_mv_sb[sign_bias][NEARMV],
+                      &best_mv_sb[sign_bias],
+                      cnt,
+                      refframe,
+                      ref_frame_sign_bias);
+
+    invert_and_clamp_mvs(&mode_mv_sb[!sign_bias][NEARESTMV],
+                         &mode_mv_sb[sign_bias][NEARESTMV], xd);
+    invert_and_clamp_mvs(&mode_mv_sb[!sign_bias][NEARMV],
+                         &mode_mv_sb[sign_bias][NEARMV], xd);
+    invert_and_clamp_mvs(&best_mv_sb[!sign_bias],
+                         &best_mv_sb[sign_bias], xd);
+
+    return sign_bias;
+}
+
+
+vp8_prob *vp8_mv_ref_probs(
+    vp8_prob p[VP8_MVREFS-1], const int near_mv_ref_ct[4]
+)
+{
+    p[0] = vp8_mode_contexts [near_mv_ref_ct[0]] [0];
+    p[1] = vp8_mode_contexts [near_mv_ref_ct[1]] [1];
+    p[2] = vp8_mode_contexts [near_mv_ref_ct[2]] [2];
+    p[3] = vp8_mode_contexts [near_mv_ref_ct[3]] [3];
+    /*p[3] = vp8_mode_contexts [near_mv_ref_ct[1] + near_mv_ref_ct[2] + near_mv_ref_ct[3]] [3];*/
+    return p;
+}
+