libvpx: Add VP9 decoder.

source/libvpx/vp9/encoder/vp9_encodemv.c

+/*
+ *  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 "vp9/common/vp9_common.h"
+#include "vp9/encoder/vp9_encodemv.h"
+#include "vp9/common/vp9_entropymode.h"
+#include "vp9/common/vp9_systemdependent.h"
+
+#include <math.h>
+
+#ifdef ENTROPY_STATS
+extern unsigned int active_section;
+#endif
+
+#ifdef NMV_STATS
+nmv_context_counts tnmvcounts;
+#endif
+
+static void encode_nmv_component(vp9_writer* const bc,
+                                 int v,
+                                 int r,
+                                 const nmv_component* const mvcomp) {
+  int s, z, c, o, d;
+  assert (v != 0);            /* should not be zero */
+  s = v < 0;
+  vp9_write(bc, s, mvcomp->sign);
+  z = (s ? -v : v) - 1;       /* magnitude - 1 */
+
+  c = vp9_get_mv_class(z, &o);
+
+  write_token(bc, vp9_mv_class_tree, mvcomp->classes,
+              vp9_mv_class_encodings + c);
+
+  d = (o >> 3);               /* int mv data */
+
+  if (c == MV_CLASS_0) {
+    write_token(bc, vp9_mv_class0_tree, mvcomp->class0,
+                vp9_mv_class0_encodings + d);
+  } else {
+    int i, b;
+    b = c + CLASS0_BITS - 1;  /* number of bits */
+    for (i = 0; i < b; ++i)
+      vp9_write(bc, ((d >> i) & 1), mvcomp->bits[i]);
+  }
+}
+
+static void encode_nmv_component_fp(vp9_writer *bc,
+                                    int v,
+                                    int r,
+                                    const nmv_component* const mvcomp,
+                                    int usehp) {
+  int s, z, c, o, d, f, e;
+  assert (v != 0);            /* should not be zero */
+  s = v < 0;
+  z = (s ? -v : v) - 1;       /* magnitude - 1 */
+
+  c = vp9_get_mv_class(z, &o);
+
+  d = (o >> 3);               /* int mv data */
+  f = (o >> 1) & 3;           /* fractional pel mv data */
+  e = (o & 1);                /* high precision mv data */
+
+  /* Code the fractional pel bits */
+  if (c == MV_CLASS_0) {
+    write_token(bc, vp9_mv_fp_tree, mvcomp->class0_fp[d],
+                vp9_mv_fp_encodings + f);
+  } else {
+    write_token(bc, vp9_mv_fp_tree, mvcomp->fp,
+                vp9_mv_fp_encodings + f);
+  }
+  /* Code the high precision bit */
+  if (usehp) {
+    if (c == MV_CLASS_0) {
+      vp9_write(bc, e, mvcomp->class0_hp);
+    } else {
+      vp9_write(bc, e, mvcomp->hp);
+    }
+  }
+}
+
+static void build_nmv_component_cost_table(int *mvcost,
+                                           const nmv_component* const mvcomp,
+                                           int usehp) {
+  int i, v;
+  int sign_cost[2], class_cost[MV_CLASSES], class0_cost[CLASS0_SIZE];
+  int bits_cost[MV_OFFSET_BITS][2];
+  int class0_fp_cost[CLASS0_SIZE][4], fp_cost[4];
+  int class0_hp_cost[2], hp_cost[2];
+
+  sign_cost[0] = vp9_cost_zero(mvcomp->sign);
+  sign_cost[1] = vp9_cost_one(mvcomp->sign);
+  vp9_cost_tokens(class_cost, mvcomp->classes, vp9_mv_class_tree);
+  vp9_cost_tokens(class0_cost, mvcomp->class0, vp9_mv_class0_tree);
+  for (i = 0; i < MV_OFFSET_BITS; ++i) {
+    bits_cost[i][0] = vp9_cost_zero(mvcomp->bits[i]);
+    bits_cost[i][1] = vp9_cost_one(mvcomp->bits[i]);
+  }
+
+  for (i = 0; i < CLASS0_SIZE; ++i)
+    vp9_cost_tokens(class0_fp_cost[i], mvcomp->class0_fp[i], vp9_mv_fp_tree);
+  vp9_cost_tokens(fp_cost, mvcomp->fp, vp9_mv_fp_tree);
+
+  if (usehp) {
+    class0_hp_cost[0] = vp9_cost_zero(mvcomp->class0_hp);
+    class0_hp_cost[1] = vp9_cost_one(mvcomp->class0_hp);
+    hp_cost[0] = vp9_cost_zero(mvcomp->hp);
+    hp_cost[1] = vp9_cost_one(mvcomp->hp);
+  }
+  mvcost[0] = 0;
+  for (v = 1; v <= MV_MAX; ++v) {
+    int z, c, o, d, e, f, cost = 0;
+    z = v - 1;
+    c = vp9_get_mv_class(z, &o);
+    cost += class_cost[c];
+    d = (o >> 3);               /* int mv data */
+    f = (o >> 1) & 3;           /* fractional pel mv data */
+    e = (o & 1);                /* high precision mv data */
+    if (c == MV_CLASS_0) {
+      cost += class0_cost[d];
+    } else {
+      int i, b;
+      b = c + CLASS0_BITS - 1;  /* number of bits */
+      for (i = 0; i < b; ++i)
+        cost += bits_cost[i][((d >> i) & 1)];
+    }
+    if (c == MV_CLASS_0) {
+      cost += class0_fp_cost[d][f];
+    } else {
+      cost += fp_cost[f];
+    }
+    if (usehp) {
+      if (c == MV_CLASS_0) {
+        cost += class0_hp_cost[e];
+      } else {
+        cost += hp_cost[e];
+      }
+    }
+    mvcost[v] = cost + sign_cost[0];
+    mvcost[-v] = cost + sign_cost[1];
+  }
+}
+
+static int update_nmv_savings(const unsigned int ct[2],
+                              const vp9_prob cur_p,
+                              const vp9_prob new_p,
+                              const vp9_prob upd_p) {
+
+#ifdef LOW_PRECISION_MV_UPDATE
+  vp9_prob mod_p = new_p | 1;
+#else
+  vp9_prob mod_p = new_p;
+#endif
+  const int cur_b = cost_branch256(ct, cur_p);
+  const int mod_b = cost_branch256(ct, mod_p);
+  const int cost = 7 * 256 +
+#ifndef LOW_PRECISION_MV_UPDATE
+      256 +
+#endif
+      (vp9_cost_one(upd_p) - vp9_cost_zero(upd_p));
+  if (cur_b - mod_b - cost > 0) {
+    return cur_b - mod_b - cost;
+  } else {
+    return 0 - vp9_cost_zero(upd_p);
+  }
+}
+
+static int update_nmv(
+  vp9_writer *const bc,
+  const unsigned int ct[2],
+  vp9_prob *const cur_p,
+  const vp9_prob new_p,
+  const vp9_prob upd_p) {
+
+#ifdef LOW_PRECISION_MV_UPDATE
+  vp9_prob mod_p = new_p | 1;
+#else
+  vp9_prob mod_p = new_p;
+#endif
+
+  const int cur_b = cost_branch256(ct, *cur_p);
+  const int mod_b = cost_branch256(ct, mod_p);
+  const int cost = 7 * 256 +
+#ifndef LOW_PRECISION_MV_UPDATE
+      256 +
+#endif
+      (vp9_cost_one(upd_p) - vp9_cost_zero(upd_p));
+
+  if (cur_b - mod_b > cost) {
+    *cur_p = mod_p;
+    vp9_write(bc, 1, upd_p);
+#ifdef LOW_PRECISION_MV_UPDATE
+    vp9_write_literal(bc, mod_p >> 1, 7);
+#else
+    vp9_write_literal(bc, mod_p, 8);
+#endif
+    return 1;
+  } else {
+    vp9_write(bc, 0, upd_p);
+    return 0;
+  }
+}
+
+void print_nmvcounts(nmv_context_counts tnmvcounts) {
+  int i, j, k;
+  printf("\nCounts =\n  { ");
+  for (j = 0; j < MV_JOINTS; ++j)
+    printf("%d, ", tnmvcounts.joints[j]);
+  printf("},\n");
+  for (i = 0; i < 2; ++i) {
+    printf("  {\n");
+    printf("    %d/%d,\n", tnmvcounts.comps[i].sign[0],
+                           tnmvcounts.comps[i].sign[1]);
+    printf("    { ");
+    for (j = 0; j < MV_CLASSES; ++j)
+      printf("%d, ", tnmvcounts.comps[i].classes[j]);
+    printf("},\n");
+    printf("    { ");
+    for (j = 0; j < CLASS0_SIZE; ++j)
+      printf("%d, ", tnmvcounts.comps[i].class0[j]);
+    printf("},\n");
+    printf("    { ");
+    for (j = 0; j < MV_OFFSET_BITS; ++j)
+      printf("%d/%d, ", tnmvcounts.comps[i].bits[j][0],
+                        tnmvcounts.comps[i].bits[j][1]);
+    printf("},\n");
+
+    printf("    {");
+    for (j = 0; j < CLASS0_SIZE; ++j) {
+      printf("{");
+      for (k = 0; k < 4; ++k)
+        printf("%d, ", tnmvcounts.comps[i].class0_fp[j][k]);
+      printf("}, ");
+    }
+    printf("},\n");
+
+    printf("    { ");
+    for (j = 0; j < 4; ++j)
+      printf("%d, ", tnmvcounts.comps[i].fp[j]);
+    printf("},\n");
+
+    printf("    %d/%d,\n",
+           tnmvcounts.comps[i].class0_hp[0],
+           tnmvcounts.comps[i].class0_hp[1]);
+    printf("    %d/%d,\n",
+           tnmvcounts.comps[i].hp[0],
+           tnmvcounts.comps[i].hp[1]);
+    printf("  },\n");
+  }
+}
+
+#ifdef NMV_STATS
+void init_nmvstats() {
+  vp9_zero(tnmvcounts);
+}
+
+void print_nmvstats() {
+  nmv_context prob;
+  unsigned int branch_ct_joint[MV_JOINTS - 1][2];
+  unsigned int branch_ct_sign[2][2];
+  unsigned int branch_ct_classes[2][MV_CLASSES - 1][2];
+  unsigned int branch_ct_class0[2][CLASS0_SIZE - 1][2];
+  unsigned int branch_ct_bits[2][MV_OFFSET_BITS][2];
+  unsigned int branch_ct_class0_fp[2][CLASS0_SIZE][4 - 1][2];
+  unsigned int branch_ct_fp[2][4 - 1][2];
+  unsigned int branch_ct_class0_hp[2][2];
+  unsigned int branch_ct_hp[2][2];
+  int i, j, k;
+  vp9_counts_to_nmv_context(&tnmvcounts, &prob, 1,
+                            branch_ct_joint, branch_ct_sign, branch_ct_classes,
+                            branch_ct_class0, branch_ct_bits,
+                            branch_ct_class0_fp, branch_ct_fp,
+                            branch_ct_class0_hp, branch_ct_hp);
+
+  printf("\nCounts =\n  { ");
+  for (j = 0; j < MV_JOINTS; ++j)
+    printf("%d, ", tnmvcounts.joints[j]);
+  printf("},\n");
+  for (i = 0; i < 2; ++i) {
+    printf("  {\n");
+    printf("    %d/%d,\n", tnmvcounts.comps[i].sign[0],
+                           tnmvcounts.comps[i].sign[1]);
+    printf("    { ");
+    for (j = 0; j < MV_CLASSES; ++j)
+      printf("%d, ", tnmvcounts.comps[i].classes[j]);
+    printf("},\n");
+    printf("    { ");
+    for (j = 0; j < CLASS0_SIZE; ++j)
+      printf("%d, ", tnmvcounts.comps[i].class0[j]);
+    printf("},\n");
+    printf("    { ");
+    for (j = 0; j < MV_OFFSET_BITS; ++j)
+      printf("%d/%d, ", tnmvcounts.comps[i].bits[j][0],
+                        tnmvcounts.comps[i].bits[j][1]);
+    printf("},\n");
+
+    printf("    {");
+    for (j = 0; j < CLASS0_SIZE; ++j) {
+      printf("{");
+      for (k = 0; k < 4; ++k)
+        printf("%d, ", tnmvcounts.comps[i].class0_fp[j][k]);
+      printf("}, ");
+    }
+    printf("},\n");
+
+    printf("    { ");
+    for (j = 0; j < 4; ++j)
+      printf("%d, ", tnmvcounts.comps[i].fp[j]);
+    printf("},\n");
+
+    printf("    %d/%d,\n",
+           tnmvcounts.comps[i].class0_hp[0],
+           tnmvcounts.comps[i].class0_hp[1]);
+    printf("    %d/%d,\n",
+           tnmvcounts.comps[i].hp[0],
+           tnmvcounts.comps[i].hp[1]);
+    printf("  },\n");
+  }
+
+  printf("\nProbs =\n  { ");
+  for (j = 0; j < MV_JOINTS - 1; ++j)
+    printf("%d, ", prob.joints[j]);
+  printf("},\n");
+  for (i=0; i< 2; ++i) {
+    printf("  {\n");
+    printf("    %d,\n", prob.comps[i].sign);
+    printf("    { ");
+    for (j = 0; j < MV_CLASSES - 1; ++j)
+      printf("%d, ", prob.comps[i].classes[j]);
+    printf("},\n");
+    printf("    { ");
+    for (j = 0; j < CLASS0_SIZE - 1; ++j)
+      printf("%d, ", prob.comps[i].class0[j]);
+    printf("},\n");
+    printf("    { ");
+    for (j = 0; j < MV_OFFSET_BITS; ++j)
+      printf("%d, ", prob.comps[i].bits[j]);
+    printf("},\n");
+    printf("    { ");
+    for (j = 0; j < CLASS0_SIZE; ++j) {
+      printf("{");
+      for (k = 0; k < 3; ++k)
+        printf("%d, ", prob.comps[i].class0_fp[j][k]);
+      printf("}, ");
+    }
+    printf("},\n");
+    printf("    { ");
+    for (j = 0; j < 3; ++j)
+      printf("%d, ", prob.comps[i].fp[j]);
+    printf("},\n");
+
+    printf("    %d,\n", prob.comps[i].class0_hp);
+    printf("    %d,\n", prob.comps[i].hp);
+    printf("  },\n");
+  }
+}
+
+static void add_nmvcount(nmv_context_counts* const dst,
+                         const nmv_context_counts* const src) {
+  int i, j, k;
+  for (j = 0; j < MV_JOINTS; ++j) {
+    dst->joints[j] += src->joints[j];
+  }
+  for (i = 0; i < 2; ++i) {
+    for (j = 0; j < MV_VALS; ++j) {
+      dst->comps[i].mvcount[j] += src->comps[i].mvcount[j];
+    }
+    dst->comps[i].sign[0] += src->comps[i].sign[0];
+    dst->comps[i].sign[1] += src->comps[i].sign[1];
+    for (j = 0; j < MV_CLASSES; ++j) {
+      dst->comps[i].classes[j] += src->comps[i].classes[j];
+    }
+    for (j = 0; j < CLASS0_SIZE; ++j) {
+      dst->comps[i].class0[j] += src->comps[i].class0[j];
+    }
+    for (j = 0; j < MV_OFFSET_BITS; ++j) {
+      dst->comps[i].bits[j][0] += src->comps[i].bits[j][0];
+      dst->comps[i].bits[j][1] += src->comps[i].bits[j][1];
+    }
+  }
+  for (i = 0; i < 2; ++i) {
+    for (j = 0; j < CLASS0_SIZE; ++j) {
+      for (k = 0; k < 4; ++k) {
+        dst->comps[i].class0_fp[j][k] += src->comps[i].class0_fp[j][k];
+      }
+    }
+    for (j = 0; j < 4; ++j) {
+      dst->comps[i].fp[j] += src->comps[i].fp[j];
+    }
+    dst->comps[i].class0_hp[0] += src->comps[i].class0_hp[0];
+    dst->comps[i].class0_hp[1] += src->comps[i].class0_hp[1];
+    dst->comps[i].hp[0] += src->comps[i].hp[0];
+    dst->comps[i].hp[1] += src->comps[i].hp[1];
+  }
+}
+#endif
+
+void vp9_write_nmv_probs(VP9_COMP* const cpi, int usehp, vp9_writer* const bc) {
+  int i, j;
+  nmv_context prob;
+  unsigned int branch_ct_joint[MV_JOINTS - 1][2];
+  unsigned int branch_ct_sign[2][2];
+  unsigned int branch_ct_classes[2][MV_CLASSES - 1][2];
+  unsigned int branch_ct_class0[2][CLASS0_SIZE - 1][2];
+  unsigned int branch_ct_bits[2][MV_OFFSET_BITS][2];
+  unsigned int branch_ct_class0_fp[2][CLASS0_SIZE][4 - 1][2];
+  unsigned int branch_ct_fp[2][4 - 1][2];
+  unsigned int branch_ct_class0_hp[2][2];
+  unsigned int branch_ct_hp[2][2];
+#ifdef MV_GROUP_UPDATE
+  int savings = 0;
+#endif
+
+#ifdef NMV_STATS
+  if (!cpi->dummy_packing)
+    add_nmvcount(&tnmvcounts, &cpi->NMVcount);
+#endif
+  vp9_counts_to_nmv_context(&cpi->NMVcount, &prob, usehp,
+                            branch_ct_joint, branch_ct_sign, branch_ct_classes,
+                            branch_ct_class0, branch_ct_bits,
+                            branch_ct_class0_fp, branch_ct_fp,
+                            branch_ct_class0_hp, branch_ct_hp);
+  /* write updates if they help */
+#ifdef MV_GROUP_UPDATE
+  for (j = 0; j < MV_JOINTS - 1; ++j) {
+    savings += update_nmv_savings(branch_ct_joint[j],
+                                  cpi->common.fc.nmvc.joints[j],
+                                  prob.joints[j],
+                                  VP9_NMV_UPDATE_PROB);
+  }
+  for (i = 0; i < 2; ++i) {
+    savings += update_nmv_savings(branch_ct_sign[i],
+                                  cpi->common.fc.nmvc.comps[i].sign,
+                                  prob.comps[i].sign,
+                                  VP9_NMV_UPDATE_PROB);
+    for (j = 0; j < MV_CLASSES - 1; ++j) {
+      savings += update_nmv_savings(branch_ct_classes[i][j],
+                                    cpi->common.fc.nmvc.comps[i].classes[j],
+                                    prob.comps[i].classes[j],
+                                    VP9_NMV_UPDATE_PROB);
+    }
+    for (j = 0; j < CLASS0_SIZE - 1; ++j) {
+      savings += update_nmv_savings(branch_ct_class0[i][j],
+                                    cpi->common.fc.nmvc.comps[i].class0[j],
+                                    prob.comps[i].class0[j],
+                                    VP9_NMV_UPDATE_PROB);
+    }
+    for (j = 0; j < MV_OFFSET_BITS; ++j) {
+      savings += update_nmv_savings(branch_ct_bits[i][j],
+                                    cpi->common.fc.nmvc.comps[i].bits[j],
+                                    prob.comps[i].bits[j],
+                                    VP9_NMV_UPDATE_PROB);
+    }
+  }
+  for (i = 0; i < 2; ++i) {
+    for (j = 0; j < CLASS0_SIZE; ++j) {
+      int k;
+      for (k = 0; k < 3; ++k) {
+        savings += update_nmv_savings(branch_ct_class0_fp[i][j][k],
+                                      cpi->common.fc.nmvc.comps[i].class0_fp[j][k],
+                                      prob.comps[i].class0_fp[j][k],
+                                      VP9_NMV_UPDATE_PROB);
+      }
+    }
+    for (j = 0; j < 3; ++j) {
+      savings += update_nmv_savings(branch_ct_fp[i][j],
+                                    cpi->common.fc.nmvc.comps[i].fp[j],
+                                    prob.comps[i].fp[j],
+                                    VP9_NMV_UPDATE_PROB);
+    }
+  }
+  if (usehp) {
+    for (i = 0; i < 2; ++i) {
+      savings += update_nmv_savings(branch_ct_class0_hp[i],
+                                    cpi->common.fc.nmvc.comps[i].class0_hp,
+                                    prob.comps[i].class0_hp,
+                                    VP9_NMV_UPDATE_PROB);
+      savings += update_nmv_savings(branch_ct_hp[i],
+                                    cpi->common.fc.nmvc.comps[i].hp,
+                                    prob.comps[i].hp,
+                                    VP9_NMV_UPDATE_PROB);
+    }
+  }
+  if (savings <= 0) {
+    vp9_write_bit(bc, 0);
+    return;
+  }
+  vp9_write_bit(bc, 1);
+#endif
+
+  for (j = 0; j < MV_JOINTS - 1; ++j) {
+    update_nmv(bc, branch_ct_joint[j],
+               &cpi->common.fc.nmvc.joints[j],
+               prob.joints[j],
+               VP9_NMV_UPDATE_PROB);
+  }
+  for (i = 0; i < 2; ++i) {
+    update_nmv(bc, branch_ct_sign[i],
+               &cpi->common.fc.nmvc.comps[i].sign,
+               prob.comps[i].sign,
+               VP9_NMV_UPDATE_PROB);
+    for (j = 0; j < MV_CLASSES - 1; ++j) {
+      update_nmv(bc, branch_ct_classes[i][j],
+                 &cpi->common.fc.nmvc.comps[i].classes[j],
+                 prob.comps[i].classes[j],
+                 VP9_NMV_UPDATE_PROB);
+    }
+    for (j = 0; j < CLASS0_SIZE - 1; ++j) {
+      update_nmv(bc, branch_ct_class0[i][j],
+                 &cpi->common.fc.nmvc.comps[i].class0[j],
+                 prob.comps[i].class0[j],
+                 VP9_NMV_UPDATE_PROB);
+    }
+    for (j = 0; j < MV_OFFSET_BITS; ++j) {
+      update_nmv(bc, branch_ct_bits[i][j],
+                 &cpi->common.fc.nmvc.comps[i].bits[j],
+                 prob.comps[i].bits[j],
+                 VP9_NMV_UPDATE_PROB);
+    }
+  }
+  for (i = 0; i < 2; ++i) {
+    for (j = 0; j < CLASS0_SIZE; ++j) {
+      int k;
+      for (k = 0; k < 3; ++k) {
+        update_nmv(bc, branch_ct_class0_fp[i][j][k],
+                   &cpi->common.fc.nmvc.comps[i].class0_fp[j][k],
+                   prob.comps[i].class0_fp[j][k],
+                   VP9_NMV_UPDATE_PROB);
+      }
+    }
+    for (j = 0; j < 3; ++j) {
+      update_nmv(bc, branch_ct_fp[i][j],
+                 &cpi->common.fc.nmvc.comps[i].fp[j],
+                 prob.comps[i].fp[j],
+                 VP9_NMV_UPDATE_PROB);
+    }
+  }
+  if (usehp) {
+    for (i = 0; i < 2; ++i) {
+      update_nmv(bc, branch_ct_class0_hp[i],
+                 &cpi->common.fc.nmvc.comps[i].class0_hp,
+                 prob.comps[i].class0_hp,
+                 VP9_NMV_UPDATE_PROB);
+      update_nmv(bc, branch_ct_hp[i],
+                 &cpi->common.fc.nmvc.comps[i].hp,
+                 prob.comps[i].hp,
+                 VP9_NMV_UPDATE_PROB);
+    }
+  }
+}
+
+void vp9_encode_nmv(vp9_writer* const bc, const MV* const mv,
+                    const MV* const ref, const nmv_context* const mvctx) {
+  MV_JOINT_TYPE j = vp9_get_mv_joint(*mv);
+  write_token(bc, vp9_mv_joint_tree, mvctx->joints,
+              vp9_mv_joint_encodings + j);
+  if (j == MV_JOINT_HZVNZ || j == MV_JOINT_HNZVNZ) {
+    encode_nmv_component(bc, mv->row, ref->col, &mvctx->comps[0]);
+  }
+  if (j == MV_JOINT_HNZVZ || j == MV_JOINT_HNZVNZ) {
+    encode_nmv_component(bc, mv->col, ref->col, &mvctx->comps[1]);
+  }
+}
+
+void vp9_encode_nmv_fp(vp9_writer* const bc, const MV* const mv,
+                       const MV* const ref, const nmv_context* const mvctx,
+                       int usehp) {
+  MV_JOINT_TYPE j = vp9_get_mv_joint(*mv);
+  usehp = usehp && vp9_use_nmv_hp(ref);
+  if (j == MV_JOINT_HZVNZ || j == MV_JOINT_HNZVNZ) {
+    encode_nmv_component_fp(bc, mv->row, ref->row, &mvctx->comps[0], usehp);
+  }
+  if (j == MV_JOINT_HNZVZ || j == MV_JOINT_HNZVNZ) {
+    encode_nmv_component_fp(bc, mv->col, ref->col, &mvctx->comps[1], usehp);
+  }
+}
+
+void vp9_build_nmv_cost_table(int *mvjoint,
+                              int *mvcost[2],
+                              const nmv_context* const mvctx,
+                              int usehp,
+                              int mvc_flag_v,
+                              int mvc_flag_h) {
+  vp9_clear_system_state();
+  vp9_cost_tokens(mvjoint, mvctx->joints, vp9_mv_joint_tree);
+  if (mvc_flag_v)
+    build_nmv_component_cost_table(mvcost[0], &mvctx->comps[0], usehp);
+  if (mvc_flag_h)
+    build_nmv_component_cost_table(mvcost[1], &mvctx->comps[1], usehp);
+}
+
+void vp9_update_nmv_count(VP9_COMP *cpi, MACROBLOCK *x,
+                         int_mv *best_ref_mv, int_mv *second_best_ref_mv) {
+  MB_MODE_INFO * mbmi = &x->e_mbd.mode_info_context->mbmi;
+  MV mv;
+
+  if (mbmi->mode == SPLITMV) {
+    int i;
+
+    for (i = 0; i < x->partition_info->count; i++) {
+      if (x->partition_info->bmi[i].mode == NEW4X4) {
+        if (x->e_mbd.allow_high_precision_mv) {
+          mv.row = (x->partition_info->bmi[i].mv.as_mv.row
+                    - best_ref_mv->as_mv.row);
+          mv.col = (x->partition_info->bmi[i].mv.as_mv.col
+                    - best_ref_mv->as_mv.col);
+          vp9_increment_nmv(&mv, &best_ref_mv->as_mv, &cpi->NMVcount, 1);
+          if (x->e_mbd.mode_info_context->mbmi.second_ref_frame > 0) {
+            mv.row = (x->partition_info->bmi[i].second_mv.as_mv.row
+                      - second_best_ref_mv->as_mv.row);
+            mv.col = (x->partition_info->bmi[i].second_mv.as_mv.col
+                      - second_best_ref_mv->as_mv.col);
+            vp9_increment_nmv(&mv, &second_best_ref_mv->as_mv,
+                              &cpi->NMVcount, 1);
+          }
+        } else {
+          mv.row = (x->partition_info->bmi[i].mv.as_mv.row
+                    - best_ref_mv->as_mv.row);
+          mv.col = (x->partition_info->bmi[i].mv.as_mv.col
+                    - best_ref_mv->as_mv.col);
+          vp9_increment_nmv(&mv, &best_ref_mv->as_mv, &cpi->NMVcount, 0);
+          if (x->e_mbd.mode_info_context->mbmi.second_ref_frame > 0) {
+            mv.row = (x->partition_info->bmi[i].second_mv.as_mv.row
+                      - second_best_ref_mv->as_mv.row);
+            mv.col = (x->partition_info->bmi[i].second_mv.as_mv.col
+                      - second_best_ref_mv->as_mv.col);
+            vp9_increment_nmv(&mv, &second_best_ref_mv->as_mv,
+                              &cpi->NMVcount, 0);
+          }
+        }
+      }
+    }
+  } else if (mbmi->mode == NEWMV) {
+    if (x->e_mbd.allow_high_precision_mv) {
+      mv.row = (mbmi->mv[0].as_mv.row - best_ref_mv->as_mv.row);
+      mv.col = (mbmi->mv[0].as_mv.col - best_ref_mv->as_mv.col);
+      vp9_increment_nmv(&mv, &best_ref_mv->as_mv, &cpi->NMVcount, 1);
+      if (mbmi->second_ref_frame > 0) {
+        mv.row = (mbmi->mv[1].as_mv.row - second_best_ref_mv->as_mv.row);
+        mv.col = (mbmi->mv[1].as_mv.col - second_best_ref_mv->as_mv.col);
+        vp9_increment_nmv(&mv, &second_best_ref_mv->as_mv, &cpi->NMVcount, 1);
+      }
+    } else {
+      mv.row = (mbmi->mv[0].as_mv.row - best_ref_mv->as_mv.row);
+      mv.col = (mbmi->mv[0].as_mv.col - best_ref_mv->as_mv.col);
+      vp9_increment_nmv(&mv, &best_ref_mv->as_mv, &cpi->NMVcount, 0);
+      if (mbmi->second_ref_frame > 0) {
+        mv.row = (mbmi->mv[1].as_mv.row - second_best_ref_mv->as_mv.row);
+        mv.col = (mbmi->mv[1].as_mv.col - second_best_ref_mv->as_mv.col);
+        vp9_increment_nmv(&mv, &second_best_ref_mv->as_mv, &cpi->NMVcount, 0);
+      }
+    }
+  }
+}