src/third_party/libvpx/vp8/common/entropymode.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.
 */

#define USE_PREBUILT_TABLES

#include "entropymode.h"
#include "entropy.h"
#include "vpx_mem/vpx_mem.h"

#include "vp8_entropymodedata.h"

int vp8_mv_cont(const int_mv *l, const int_mv *a) {
  int lez = (l->as_int == 0);
  int aez = (a->as_int == 0);
  int lea = (l->as_int == a->as_int);

  if (lea && lez) return SUBMVREF_LEFT_ABOVE_ZED;

  if (lea) return SUBMVREF_LEFT_ABOVE_SAME;

  if (aez) return SUBMVREF_ABOVE_ZED;

  if (lez) return SUBMVREF_LEFT_ZED;

  return SUBMVREF_NORMAL;
}

static const vp8_prob sub_mv_ref_prob[VP8_SUBMVREFS - 1] = { 180, 162, 25 };

const vp8_prob vp8_sub_mv_ref_prob2[SUBMVREF_COUNT][VP8_SUBMVREFS - 1] = {
  { 147, 136, 18 },
  { 106, 145, 1 },
  { 179, 121, 1 },
  { 223, 1, 34 },
  { 208, 1, 1 }
};

const vp8_mbsplit vp8_mbsplits[VP8_NUMMBSPLITS] = {
  { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 },
  { 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1 },
  { 0, 0, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 2, 2, 3, 3 },
  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }
};

const int vp8_mbsplit_count[VP8_NUMMBSPLITS] = { 2, 2, 4, 16 };

const vp8_prob vp8_mbsplit_probs[VP8_NUMMBSPLITS - 1] = { 110, 111, 150 };

/* Array indices are identical to previously-existing INTRAMODECONTEXTNODES. */

const vp8_tree_index vp8_bmode_tree[18] = /* INTRAMODECONTEXTNODE value */
    {
      -B_DC_PRED, 2,          /* 0 = DC_NODE */
      -B_TM_PRED, 4,          /* 1 = TM_NODE */
      -B_VE_PRED, 6,          /* 2 = VE_NODE */
      8,          12,         /* 3 = COM_NODE */
      -B_HE_PRED, 10,         /* 4 = HE_NODE */
      -B_RD_PRED, -B_VR_PRED, /* 5 = RD_NODE */
      -B_LD_PRED, 14,         /* 6 = LD_NODE */
      -B_VL_PRED, 16,         /* 7 = VL_NODE */
      -B_HD_PRED, -B_HU_PRED  /* 8 = HD_NODE */
    };

/* Again, these trees use the same probability indices as their
   explicitly-programmed predecessors. */

const vp8_tree_index vp8_ymode_tree[8] = {
  -DC_PRED, 2, 4, 6, -V_PRED, -H_PRED, -TM_PRED, -B_PRED
};

const vp8_tree_index vp8_kf_ymode_tree[8] = { -B_PRED, 2,        4,
                                              6,       -DC_PRED, -V_PRED,
                                              -H_PRED, -TM_PRED };

const vp8_tree_index vp8_uv_mode_tree[6] = { -DC_PRED, 2,       -V_PRED,
                                             4,        -H_PRED, -TM_PRED };

const vp8_tree_index vp8_mbsplit_tree[6] = { -3, 2, -2, 4, -0, -1 };

const vp8_tree_index vp8_mv_ref_tree[8] = { -ZEROMV, 2, -NEARESTMV, 4,
                                            -NEARMV, 6, -NEWMV,     -SPLITMV };

const vp8_tree_index vp8_sub_mv_ref_tree[6] = { -LEFT4X4, 2,        -ABOVE4X4,
                                                4,        -ZERO4X4, -NEW4X4 };

const vp8_tree_index vp8_small_mvtree[14] = { 2,  8,  4,  6,  -0, -1, -2,
                                              -3, 10, 12, -4, -5, -6, -7 };

void vp8_init_mbmode_probs(VP8_COMMON *x) {
  memcpy(x->fc.ymode_prob, vp8_ymode_prob, sizeof(vp8_ymode_prob));
  memcpy(x->fc.uv_mode_prob, vp8_uv_mode_prob, sizeof(vp8_uv_mode_prob));
  memcpy(x->fc.sub_mv_ref_prob, sub_mv_ref_prob, sizeof(sub_mv_ref_prob));
}

void vp8_default_bmode_probs(vp8_prob dest[VP8_BINTRAMODES - 1]) {
  memcpy(dest, vp8_bmode_prob, sizeof(vp8_bmode_prob));
}