/*
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
 */

#include <assert.h>
#include <math.h>
#include <stdio.h>

#include "config/av1_rtcd.h"

#include "aom_dsp/aom_dsp_common.h"
#include "aom_mem/aom_mem.h"
#include "aom_ports/bitops.h"
#include "aom_ports/mem.h"
#include "aom_ports/system_state.h"

#include "av1/common/common.h"
#include "av1/common/entropy.h"
#include "av1/common/entropymode.h"
#include "av1/common/mvref_common.h"
#include "av1/common/pred_common.h"
#include "av1/common/quant_common.h"
#include "av1/common/reconinter.h"
#include "av1/common/reconintra.h"
#include "av1/common/seg_common.h"

#include "av1/encoder/av1_quantize.h"
#include "av1/encoder/cost.h"
#include "av1/encoder/encodemb.h"
#include "av1/encoder/encodemv.h"
#include "av1/encoder/encoder.h"
#include "av1/encoder/encodetxb.h"
#include "av1/encoder/mcomp.h"
#include "av1/encoder/ratectrl.h"
#include "av1/encoder/rd.h"
#include "av1/encoder/tokenize.h"

#define RD_THRESH_POW 1.25

// The baseline rd thresholds for breaking out of the rd loop for
// certain modes are assumed to be based on 8x8 blocks.
// This table is used to correct for block size.
// The factors here are << 2 (2 = x0.5, 32 = x8 etc).
static const uint8_t rd_thresh_block_size_factor[BLOCK_SIZES_ALL] = {
  2, 3, 3, 4, 6, 6, 8, 12, 12, 16, 24, 24, 32, 48, 48, 64, 4, 4, 8, 8, 16, 16
};

static const int use_intra_ext_tx_for_txsize[EXT_TX_SETS_INTRA]
                                            [EXT_TX_SIZES] = {
                                              { 1, 1, 1, 1 },  // unused
                                              { 1, 1, 0, 0 },
                                              { 0, 0, 1, 0 },
                                            };

static const int use_inter_ext_tx_for_txsize[EXT_TX_SETS_INTER]
                                            [EXT_TX_SIZES] = {
                                              { 1, 1, 1, 1 },  // unused
                                              { 1, 1, 0, 0 },
                                              { 0, 0, 1, 0 },
                                              { 0, 0, 0, 1 },
                                            };

static const int av1_ext_tx_set_idx_to_type[2][AOMMAX(EXT_TX_SETS_INTRA,
                                                      EXT_TX_SETS_INTER)] = {
  {
      // Intra
      EXT_TX_SET_DCTONLY,
      EXT_TX_SET_DTT4_IDTX_1DDCT,
      EXT_TX_SET_DTT4_IDTX,
  },
  {
      // Inter
      EXT_TX_SET_DCTONLY,
      EXT_TX_SET_ALL16,
      EXT_TX_SET_DTT9_IDTX_1DDCT,
      EXT_TX_SET_DCT_IDTX,
  },
};

void av1_fill_mode_rates(AV1_COMMON *const cm, MACROBLOCK *x,
                         FRAME_CONTEXT *fc) {
  int i, j;

  for (i = 0; i < PARTITION_CONTEXTS; ++i)
    av1_cost_tokens_from_cdf(x->partition_cost[i], fc->partition_cdf[i], NULL);

  if (cm->current_frame.skip_mode_info.skip_mode_flag) {
    for (i = 0; i < SKIP_CONTEXTS; ++i) {
      av1_cost_tokens_from_cdf(x->skip_mode_cost[i], fc->skip_mode_cdfs[i],
                               NULL);
    }
  }

  for (i = 0; i < SKIP_CONTEXTS; ++i) {
    av1_cost_tokens_from_cdf(x->skip_cost[i], fc->skip_cdfs[i], NULL);
  }

  for (i = 0; i < KF_MODE_CONTEXTS; ++i)
    for (j = 0; j < KF_MODE_CONTEXTS; ++j)
      av1_cost_tokens_from_cdf(x->y_mode_costs[i][j], fc->kf_y_cdf[i][j], NULL);

  for (i = 0; i < BLOCK_SIZE_GROUPS; ++i)
    av1_cost_tokens_from_cdf(x->mbmode_cost[i], fc->y_mode_cdf[i], NULL);
  for (i = 0; i < CFL_ALLOWED_TYPES; ++i)
    for (j = 0; j < INTRA_MODES; ++j)
      av1_cost_tokens_from_cdf(x->intra_uv_mode_cost[i][j],
                               fc->uv_mode_cdf[i][j], NULL);

  av1_cost_tokens_from_cdf(x->filter_intra_mode_cost, fc->filter_intra_mode_cdf,
                           NULL);
  for (i = 0; i < BLOCK_SIZES_ALL; ++i) {
    if (av1_filter_intra_allowed_bsize(cm, i))
      av1_cost_tokens_from_cdf(x->filter_intra_cost[i],
                               fc->filter_intra_cdfs[i], NULL);
  }

  for (i = 0; i < SWITCHABLE_FILTER_CONTEXTS; ++i)
    av1_cost_tokens_from_cdf(x->switchable_interp_costs[i],
                             fc->switchable_interp_cdf[i], NULL);

  for (i = 0; i < PALATTE_BSIZE_CTXS; ++i) {
    av1_cost_tokens_from_cdf(x->palette_y_size_cost[i],
                             fc->palette_y_size_cdf[i], NULL);
    av1_cost_tokens_from_cdf(x->palette_uv_size_cost[i],
                             fc->palette_uv_size_cdf[i], NULL);
    for (j = 0; j < PALETTE_Y_MODE_CONTEXTS; ++j) {
      av1_cost_tokens_from_cdf(x->palette_y_mode_cost[i][j],
                               fc->palette_y_mode_cdf[i][j], NULL);
    }
  }

  for (i = 0; i < PALETTE_UV_MODE_CONTEXTS; ++i) {
    av1_cost_tokens_from_cdf(x->palette_uv_mode_cost[i],
                             fc->palette_uv_mode_cdf[i], NULL);
  }

  for (i = 0; i < PALETTE_SIZES; ++i) {
    for (j = 0; j < PALETTE_COLOR_INDEX_CONTEXTS; ++j) {
      av1_cost_tokens_from_cdf(x->palette_y_color_cost[i][j],
                               fc->palette_y_color_index_cdf[i][j], NULL);
      av1_cost_tokens_from_cdf(x->palette_uv_color_cost[i][j],
                               fc->palette_uv_color_index_cdf[i][j], NULL);
    }
  }

  int sign_cost[CFL_JOINT_SIGNS];
  av1_cost_tokens_from_cdf(sign_cost, fc->cfl_sign_cdf, NULL);
  for (int joint_sign = 0; joint_sign < CFL_JOINT_SIGNS; joint_sign++) {
    int *cost_u = x->cfl_cost[joint_sign][CFL_PRED_U];
    int *cost_v = x->cfl_cost[joint_sign][CFL_PRED_V];
    if (CFL_SIGN_U(joint_sign) == CFL_SIGN_ZERO) {
      memset(cost_u, 0, CFL_ALPHABET_SIZE * sizeof(*cost_u));
    } else {
      const aom_cdf_prob *cdf_u = fc->cfl_alpha_cdf[CFL_CONTEXT_U(joint_sign)];
      av1_cost_tokens_from_cdf(cost_u, cdf_u, NULL);
    }
    if (CFL_SIGN_V(joint_sign) == CFL_SIGN_ZERO) {
      memset(cost_v, 0, CFL_ALPHABET_SIZE * sizeof(*cost_v));
    } else {
      const aom_cdf_prob *cdf_v = fc->cfl_alpha_cdf[CFL_CONTEXT_V(joint_sign)];
      av1_cost_tokens_from_cdf(cost_v, cdf_v, NULL);
    }
    for (int u = 0; u < CFL_ALPHABET_SIZE; u++)
      cost_u[u] += sign_cost[joint_sign];
  }

  for (i = 0; i < MAX_TX_CATS; ++i)
    for (j = 0; j < TX_SIZE_CONTEXTS; ++j)
      av1_cost_tokens_from_cdf(x->tx_size_cost[i][j], fc->tx_size_cdf[i][j],
                               NULL);

  for (i = 0; i < TXFM_PARTITION_CONTEXTS; ++i) {
    av1_cost_tokens_from_cdf(x->txfm_partition_cost[i],
                             fc->txfm_partition_cdf[i], NULL);
  }

  for (i = TX_4X4; i < EXT_TX_SIZES; ++i) {
    int s;
    for (s = 1; s < EXT_TX_SETS_INTER; ++s) {
      if (use_inter_ext_tx_for_txsize[s][i]) {
        av1_cost_tokens_from_cdf(
            x->inter_tx_type_costs[s][i], fc->inter_ext_tx_cdf[s][i],
            av1_ext_tx_inv[av1_ext_tx_set_idx_to_type[1][s]]);
      }
    }
    for (s = 1; s < EXT_TX_SETS_INTRA; ++s) {
      if (use_intra_ext_tx_for_txsize[s][i]) {
        for (j = 0; j < INTRA_MODES; ++j) {
          av1_cost_tokens_from_cdf(
              x->intra_tx_type_costs[s][i][j], fc->intra_ext_tx_cdf[s][i][j],
              av1_ext_tx_inv[av1_ext_tx_set_idx_to_type[0][s]]);
        }
      }
    }
  }
  for (i = 0; i < DIRECTIONAL_MODES; ++i) {
    av1_cost_tokens_from_cdf(x->angle_delta_cost[i], fc->angle_delta_cdf[i],
                             NULL);
  }
  av1_cost_tokens_from_cdf(x->switchable_restore_cost,
                           fc->switchable_restore_cdf, NULL);
  av1_cost_tokens_from_cdf(x->wiener_restore_cost, fc->wiener_restore_cdf,
                           NULL);
  av1_cost_tokens_from_cdf(x->sgrproj_restore_cost, fc->sgrproj_restore_cdf,
                           NULL);
  av1_cost_tokens_from_cdf(x->intrabc_cost, fc->intrabc_cdf, NULL);

  if (!frame_is_intra_only(cm)) {
    for (i = 0; i < COMP_INTER_CONTEXTS; ++i) {
      av1_cost_tokens_from_cdf(x->comp_inter_cost[i], fc->comp_inter_cdf[i],
                               NULL);
    }

    for (i = 0; i < REF_CONTEXTS; ++i) {
      for (j = 0; j < SINGLE_REFS - 1; ++j) {
        av1_cost_tokens_from_cdf(x->single_ref_cost[i][j],
                                 fc->single_ref_cdf[i][j], NULL);
      }
    }

    for (i = 0; i < COMP_REF_TYPE_CONTEXTS; ++i) {
      av1_cost_tokens_from_cdf(x->comp_ref_type_cost[i],
                               fc->comp_ref_type_cdf[i], NULL);
    }

    for (i = 0; i < UNI_COMP_REF_CONTEXTS; ++i) {
      for (j = 0; j < UNIDIR_COMP_REFS - 1; ++j) {
        av1_cost_tokens_from_cdf(x->uni_comp_ref_cost[i][j],
                                 fc->uni_comp_ref_cdf[i][j], NULL);
      }
    }

    for (i = 0; i < REF_CONTEXTS; ++i) {
      for (j = 0; j < FWD_REFS - 1; ++j) {
        av1_cost_tokens_from_cdf(x->comp_ref_cost[i][j], fc->comp_ref_cdf[i][j],
                                 NULL);
      }
    }

    for (i = 0; i < REF_CONTEXTS; ++i) {
      for (j = 0; j < BWD_REFS - 1; ++j) {
        av1_cost_tokens_from_cdf(x->comp_bwdref_cost[i][j],
                                 fc->comp_bwdref_cdf[i][j], NULL);
      }
    }

    for (i = 0; i < INTRA_INTER_CONTEXTS; ++i) {
      av1_cost_tokens_from_cdf(x->intra_inter_cost[i], fc->intra_inter_cdf[i],
                               NULL);
    }

    for (i = 0; i < NEWMV_MODE_CONTEXTS; ++i) {
      av1_cost_tokens_from_cdf(x->newmv_mode_cost[i], fc->newmv_cdf[i], NULL);
    }

    for (i = 0; i < GLOBALMV_MODE_CONTEXTS; ++i) {
      av1_cost_tokens_from_cdf(x->zeromv_mode_cost[i], fc->zeromv_cdf[i], NULL);
    }

    for (i = 0; i < REFMV_MODE_CONTEXTS; ++i) {
      av1_cost_tokens_from_cdf(x->refmv_mode_cost[i], fc->refmv_cdf[i], NULL);
    }

    for (i = 0; i < DRL_MODE_CONTEXTS; ++i) {
      av1_cost_tokens_from_cdf(x->drl_mode_cost0[i], fc->drl_cdf[i], NULL);
    }
    for (i = 0; i < INTER_MODE_CONTEXTS; ++i)
      av1_cost_tokens_from_cdf(x->inter_compound_mode_cost[i],
                               fc->inter_compound_mode_cdf[i], NULL);
    for (i = 0; i < BLOCK_SIZES_ALL; ++i)
      av1_cost_tokens_from_cdf(x->compound_type_cost[i],
                               fc->compound_type_cdf[i], NULL);
    for (i = 0; i < BLOCK_SIZES_ALL; ++i) {
      if (get_interinter_wedge_bits(i)) {
        av1_cost_tokens_from_cdf(x->wedge_idx_cost[i], fc->wedge_idx_cdf[i],
                                 NULL);
      }
    }
    for (i = 0; i < BLOCK_SIZE_GROUPS; ++i) {
      av1_cost_tokens_from_cdf(x->interintra_cost[i], fc->interintra_cdf[i],
                               NULL);
      av1_cost_tokens_from_cdf(x->interintra_mode_cost[i],
                               fc->interintra_mode_cdf[i], NULL);
    }
    for (i = 0; i < BLOCK_SIZES_ALL; ++i) {
      av1_cost_tokens_from_cdf(x->wedge_interintra_cost[i],
                               fc->wedge_interintra_cdf[i], NULL);
    }
    for (i = BLOCK_8X8; i < BLOCK_SIZES_ALL; i++) {
      av1_cost_tokens_from_cdf(x->motion_mode_cost[i], fc->motion_mode_cdf[i],
                               NULL);
    }
    for (i = BLOCK_8X8; i < BLOCK_SIZES_ALL; i++) {
      av1_cost_tokens_from_cdf(x->motion_mode_cost1[i], fc->obmc_cdf[i], NULL);
    }
    for (i = 0; i < COMP_INDEX_CONTEXTS; ++i) {
      av1_cost_tokens_from_cdf(x->comp_idx_cost[i], fc->compound_index_cdf[i],
                               NULL);
    }
    for (i = 0; i < COMP_GROUP_IDX_CONTEXTS; ++i) {
      av1_cost_tokens_from_cdf(x->comp_group_idx_cost[i],
                               fc->comp_group_idx_cdf[i], NULL);
    }
  }
}

// Values are now correlated to quantizer.
static int sad_per_bit16lut_8[QINDEX_RANGE];
static int sad_per_bit4lut_8[QINDEX_RANGE];
static int sad_per_bit16lut_10[QINDEX_RANGE];
static int sad_per_bit4lut_10[QINDEX_RANGE];
static int sad_per_bit16lut_12[QINDEX_RANGE];
static int sad_per_bit4lut_12[QINDEX_RANGE];

static void init_me_luts_bd(int *bit16lut, int *bit4lut, int range,
                            aom_bit_depth_t bit_depth) {
  int i;
  // Initialize the sad lut tables using a formulaic calculation for now.
  // This is to make it easier to resolve the impact of experimental changes
  // to the quantizer tables.
  for (i = 0; i < range; i++) {
    const double q = av1_convert_qindex_to_q(i, bit_depth);
    bit16lut[i] = (int)(0.0418 * q + 2.4107);
    bit4lut[i] = (int)(0.063 * q + 2.742);
  }
}

void av1_init_me_luts(void) {
  init_me_luts_bd(sad_per_bit16lut_8, sad_per_bit4lut_8, QINDEX_RANGE,
                  AOM_BITS_8);
  init_me_luts_bd(sad_per_bit16lut_10, sad_per_bit4lut_10, QINDEX_RANGE,
                  AOM_BITS_10);
  init_me_luts_bd(sad_per_bit16lut_12, sad_per_bit4lut_12, QINDEX_RANGE,
                  AOM_BITS_12);
}

static const int rd_boost_factor[16] = { 64, 32, 32, 32, 24, 16, 12, 12,
                                         8,  8,  4,  4,  2,  2,  1,  0 };
static const int rd_frame_type_factor[FRAME_UPDATE_TYPES] = { 128, 144, 128,
                                                              128, 144, 144,
                                                              128 };

int av1_compute_rd_mult_based_on_qindex(const AV1_COMP *cpi, int qindex) {
  const int q = av1_dc_quant_Q3(qindex, 0, cpi->common.seq_params.bit_depth);
  int rdmult = q * q;
  rdmult = rdmult * 3 + (rdmult * 2 / 3);
  switch (cpi->common.seq_params.bit_depth) {
    case AOM_BITS_8: break;
    case AOM_BITS_10: rdmult = ROUND_POWER_OF_TWO(rdmult, 4); break;
    case AOM_BITS_12: rdmult = ROUND_POWER_OF_TWO(rdmult, 8); break;
    default:
      assert(0 && "bit_depth should be AOM_BITS_8, AOM_BITS_10 or AOM_BITS_12");
      return -1;
  }
  return rdmult > 0 ? rdmult : 1;
}

int av1_compute_rd_mult(const AV1_COMP *cpi, int qindex) {
  int64_t rdmult = av1_compute_rd_mult_based_on_qindex(cpi, qindex);
  if (cpi->oxcf.pass == 2 &&
      (cpi->common.current_frame.frame_type != KEY_FRAME)) {
    const GF_GROUP *const gf_group = &cpi->twopass.gf_group;
    const FRAME_UPDATE_TYPE frame_type = gf_group->update_type[gf_group->index];
    const int boost_index = AOMMIN(15, (cpi->rc.gfu_boost / 100));

    rdmult = (rdmult * rd_frame_type_factor[frame_type]) >> 7;
    rdmult += ((rdmult * rd_boost_factor[boost_index]) >> 7);
  }
  return (int)rdmult;
}

int av1_get_adaptive_rdmult(const AV1_COMP *cpi, double beta) {
  const AV1_COMMON *cm = &cpi->common;
  int64_t q =
      av1_dc_quant_Q3(cm->base_qindex, 0, cpi->common.seq_params.bit_depth);
  int64_t rdmult = 0;

  switch (cpi->common.seq_params.bit_depth) {
    case AOM_BITS_8: rdmult = (int)((88 * q * q / beta) / 24); break;
    case AOM_BITS_10:
      rdmult = ROUND_POWER_OF_TWO((int)((88 * q * q / beta) / 24), 4);
      break;
    default:
      assert(cpi->common.seq_params.bit_depth == AOM_BITS_12);
      rdmult = ROUND_POWER_OF_TWO((int)((88 * q * q / beta) / 24), 8);
      break;
  }

  if (cpi->oxcf.pass == 2 &&
      (cpi->common.current_frame.frame_type != KEY_FRAME)) {
    const GF_GROUP *const gf_group = &cpi->twopass.gf_group;
    const FRAME_UPDATE_TYPE frame_type = gf_group->update_type[gf_group->index];
    const int boost_index = AOMMIN(15, (cpi->rc.gfu_boost / 100));

    rdmult = (rdmult * rd_frame_type_factor[frame_type]) >> 7;
    rdmult += ((rdmult * rd_boost_factor[boost_index]) >> 7);
  }
  if (rdmult < 1) rdmult = 1;
  return (int)rdmult;
}

static int compute_rd_thresh_factor(int qindex, aom_bit_depth_t bit_depth) {
  double q;
  switch (bit_depth) {
    case AOM_BITS_8: q = av1_dc_quant_Q3(qindex, 0, AOM_BITS_8) / 4.0; break;
    case AOM_BITS_10: q = av1_dc_quant_Q3(qindex, 0, AOM_BITS_10) / 16.0; break;
    case AOM_BITS_12: q = av1_dc_quant_Q3(qindex, 0, AOM_BITS_12) / 64.0; break;
    default:
      assert(0 && "bit_depth should be AOM_BITS_8, AOM_BITS_10 or AOM_BITS_12");
      return -1;
  }
  // TODO(debargha): Adjust the function below.
  return AOMMAX((int)(pow(q, RD_THRESH_POW) * 5.12), 8);
}

void av1_initialize_me_consts(const AV1_COMP *cpi, MACROBLOCK *x, int qindex) {
  switch (cpi->common.seq_params.bit_depth) {
    case AOM_BITS_8:
      x->sadperbit16 = sad_per_bit16lut_8[qindex];
      x->sadperbit4 = sad_per_bit4lut_8[qindex];
      break;
    case AOM_BITS_10:
      x->sadperbit16 = sad_per_bit16lut_10[qindex];
      x->sadperbit4 = sad_per_bit4lut_10[qindex];
      break;
    case AOM_BITS_12:
      x->sadperbit16 = sad_per_bit16lut_12[qindex];
      x->sadperbit4 = sad_per_bit4lut_12[qindex];
      break;
    default:
      assert(0 && "bit_depth should be AOM_BITS_8, AOM_BITS_10 or AOM_BITS_12");
  }
}

static void set_block_thresholds(const AV1_COMMON *cm, RD_OPT *rd) {
  int i, bsize, segment_id;

  for (segment_id = 0; segment_id < MAX_SEGMENTS; ++segment_id) {
    const int qindex =
        clamp(av1_get_qindex(&cm->seg, segment_id, cm->base_qindex) +
                  cm->y_dc_delta_q,
              0, MAXQ);
    const int q = compute_rd_thresh_factor(qindex, cm->seq_params.bit_depth);

    for (bsize = 0; bsize < BLOCK_SIZES_ALL; ++bsize) {
      // Threshold here seems unnecessarily harsh but fine given actual
      // range of values used for cpi->sf.thresh_mult[].
      const int t = q * rd_thresh_block_size_factor[bsize];
      const int thresh_max = INT_MAX / t;

      for (i = 0; i < MAX_MODES; ++i)
        rd->threshes[segment_id][bsize][i] = rd->thresh_mult[i] < thresh_max
                                                 ? rd->thresh_mult[i] * t / 4
                                                 : INT_MAX;
    }
  }
}

void av1_fill_coeff_costs(MACROBLOCK *x, FRAME_CONTEXT *fc,
                          const int num_planes) {
  const int nplanes = AOMMIN(num_planes, PLANE_TYPES);
  for (int eob_multi_size = 0; eob_multi_size < 7; ++eob_multi_size) {
    for (int plane = 0; plane < nplanes; ++plane) {
      LV_MAP_EOB_COST *pcost = &x->eob_costs[eob_multi_size][plane];

      for (int ctx = 0; ctx < 2; ++ctx) {
        aom_cdf_prob *pcdf;
        switch (eob_multi_size) {
          case 0: pcdf = fc->eob_flag_cdf16[plane][ctx]; break;
          case 1: pcdf = fc->eob_flag_cdf32[plane][ctx]; break;
          case 2: pcdf = fc->eob_flag_cdf64[plane][ctx]; break;
          case 3: pcdf = fc->eob_flag_cdf128[plane][ctx]; break;
          case 4: pcdf = fc->eob_flag_cdf256[plane][ctx]; break;
          case 5: pcdf = fc->eob_flag_cdf512[plane][ctx]; break;
          case 6:
          default: pcdf = fc->eob_flag_cdf1024[plane][ctx]; break;
        }
        av1_cost_tokens_from_cdf(pcost->eob_cost[ctx], pcdf, NULL);
      }
    }
  }
  for (int tx_size = 0; tx_size < TX_SIZES; ++tx_size) {
    for (int plane = 0; plane < nplanes; ++plane) {
      LV_MAP_COEFF_COST *pcost = &x->coeff_costs[tx_size][plane];

      for (int ctx = 0; ctx < TXB_SKIP_CONTEXTS; ++ctx)
        av1_cost_tokens_from_cdf(pcost->txb_skip_cost[ctx],
                                 fc->txb_skip_cdf[tx_size][ctx], NULL);

      for (int ctx = 0; ctx < SIG_COEF_CONTEXTS_EOB; ++ctx)
        av1_cost_tokens_from_cdf(pcost->base_eob_cost[ctx],
                                 fc->coeff_base_eob_cdf[tx_size][plane][ctx],
                                 NULL);
      for (int ctx = 0; ctx < SIG_COEF_CONTEXTS; ++ctx)
        av1_cost_tokens_from_cdf(pcost->base_cost[ctx],
                                 fc->coeff_base_cdf[tx_size][plane][ctx], NULL);

      for (int ctx = 0; ctx < SIG_COEF_CONTEXTS; ++ctx) {
        pcost->base_cost[ctx][4] = 0;
        pcost->base_cost[ctx][5] = pcost->base_cost[ctx][1] +
                                   av1_cost_literal(1) -
                                   pcost->base_cost[ctx][0];
        pcost->base_cost[ctx][6] =
            pcost->base_cost[ctx][2] - pcost->base_cost[ctx][1];
        pcost->base_cost[ctx][7] =
            pcost->base_cost[ctx][3] - pcost->base_cost[ctx][2];
      }

      for (int ctx = 0; ctx < EOB_COEF_CONTEXTS; ++ctx)
        av1_cost_tokens_from_cdf(pcost->eob_extra_cost[ctx],
                                 fc->eob_extra_cdf[tx_size][plane][ctx], NULL);

      for (int ctx = 0; ctx < DC_SIGN_CONTEXTS; ++ctx)
        av1_cost_tokens_from_cdf(pcost->dc_sign_cost[ctx],
                                 fc->dc_sign_cdf[plane][ctx], NULL);

      for (int ctx = 0; ctx < LEVEL_CONTEXTS; ++ctx) {
        int br_rate[BR_CDF_SIZE];
        int prev_cost = 0;
        int i, j;
        av1_cost_tokens_from_cdf(br_rate, fc->coeff_br_cdf[tx_size][plane][ctx],
                                 NULL);
        // printf("br_rate: ");
        // for(j = 0; j < BR_CDF_SIZE; j++)
        //  printf("%4d ", br_rate[j]);
        // printf("\n");
        for (i = 0; i < COEFF_BASE_RANGE; i += BR_CDF_SIZE - 1) {
          for (j = 0; j < BR_CDF_SIZE - 1; j++) {
            pcost->lps_cost[ctx][i + j] = prev_cost + br_rate[j];
          }
          prev_cost += br_rate[j];
        }
        pcost->lps_cost[ctx][i] = prev_cost;
        // printf("lps_cost: %d %d %2d : ", tx_size, plane, ctx);
        // for (i = 0; i <= COEFF_BASE_RANGE; i++)
        //  printf("%5d ", pcost->lps_cost[ctx][i]);
        // printf("\n");
      }
      for (int ctx = 0; ctx < LEVEL_CONTEXTS; ++ctx) {
        pcost->lps_cost[ctx][0 + COEFF_BASE_RANGE + 1] =
            pcost->lps_cost[ctx][0];
        for (int i = 1; i <= COEFF_BASE_RANGE; ++i) {
          pcost->lps_cost[ctx][i + COEFF_BASE_RANGE + 1] =
              pcost->lps_cost[ctx][i] - pcost->lps_cost[ctx][i - 1];
        }
      }
    }
  }
}

void av1_initialize_cost_tables(const AV1_COMMON *const cm, MACROBLOCK *x) {
  if (cm->cur_frame_force_integer_mv) {
    av1_build_nmv_cost_table(x->nmv_vec_cost, x->nmvcost, &cm->fc->nmvc,
                             MV_SUBPEL_NONE);
  } else {
    av1_build_nmv_cost_table(
        x->nmv_vec_cost,
        cm->allow_high_precision_mv ? x->nmvcost_hp : x->nmvcost, &cm->fc->nmvc,
        cm->allow_high_precision_mv);
  }
}

void av1_initialize_rd_consts(AV1_COMP *cpi) {
  AV1_COMMON *const cm = &cpi->common;
  MACROBLOCK *const x = &cpi->td.mb;
  RD_OPT *const rd = &cpi->rd;

  aom_clear_system_state();

  rd->RDMULT = av1_compute_rd_mult(cpi, cm->base_qindex + cm->y_dc_delta_q);

  set_error_per_bit(x, rd->RDMULT);

  set_block_thresholds(cm, rd);

  av1_initialize_cost_tables(cm, x);

  if (frame_is_intra_only(cm) && cm->allow_screen_content_tools &&
      cpi->oxcf.pass != 1) {
    int *dvcost[2] = { &cpi->dv_cost[0][MV_MAX], &cpi->dv_cost[1][MV_MAX] };
    av1_build_nmv_cost_table(cpi->dv_joint_cost, dvcost, &cm->fc->ndvc,
                             MV_SUBPEL_NONE);
  }

  if (cpi->oxcf.pass != 1) {
    for (int i = 0; i < TRANS_TYPES; ++i)
      // IDENTITY: 1 bit
      // TRANSLATION: 3 bits
      // ROTZOOM: 2 bits
      // AFFINE: 3 bits
      cpi->gmtype_cost[i] = (1 + (i > 0 ? (i == ROTZOOM ? 1 : 2) : 0))
                            << AV1_PROB_COST_SHIFT;
  }
}

static void model_rd_norm(int xsq_q10, int *r_q10, int *d_q10) {
  // NOTE: The tables below must be of the same size.

  // The functions described below are sampled at the four most significant
  // bits of x^2 + 8 / 256.

  // Normalized rate:
  // This table models the rate for a Laplacian source with given variance
  // when quantized with a uniform quantizer with given stepsize. The
  // closed form expression is:
  // Rn(x) = H(sqrt(r)) + sqrt(r)*[1 + H(r)/(1 - r)],
  // where r = exp(-sqrt(2) * x) and x = qpstep / sqrt(variance),
  // and H(x) is the binary entropy function.
  static const int rate_tab_q10[] = {
    65536, 6086, 5574, 5275, 5063, 4899, 4764, 4651, 4553, 4389, 4255, 4142,
    4044,  3958, 3881, 3811, 3748, 3635, 3538, 3453, 3376, 3307, 3244, 3186,
    3133,  3037, 2952, 2877, 2809, 2747, 2690, 2638, 2589, 2501, 2423, 2353,
    2290,  2232, 2179, 2130, 2084, 2001, 1928, 1862, 1802, 1748, 1698, 1651,
    1608,  1530, 1460, 1398, 1342, 1290, 1243, 1199, 1159, 1086, 1021, 963,
    911,   864,  821,  781,  745,  680,  623,  574,  530,  490,  455,  424,
    395,   345,  304,  269,  239,  213,  190,  171,  154,  126,  104,  87,
    73,    61,   52,   44,   38,   28,   21,   16,   12,   10,   8,    6,
    5,     3,    2,    1,    1,    1,    0,    0,
  };
  // Normalized distortion:
  // This table models the normalized distortion for a Laplacian source
  // with given variance when quantized with a uniform quantizer
  // with given stepsize. The closed form expression is:
  // Dn(x) = 1 - 1/sqrt(2) * x / sinh(x/sqrt(2))
  // where x = qpstep / sqrt(variance).
  // Note the actual distortion is Dn * variance.
  static const int dist_tab_q10[] = {
    0,    0,    1,    1,    1,    2,    2,    2,    3,    3,    4,    5,
    5,    6,    7,    7,    8,    9,    11,   12,   13,   15,   16,   17,
    18,   21,   24,   26,   29,   31,   34,   36,   39,   44,   49,   54,
    59,   64,   69,   73,   78,   88,   97,   106,  115,  124,  133,  142,
    151,  167,  184,  200,  215,  231,  245,  260,  274,  301,  327,  351,
    375,  397,  418,  439,  458,  495,  528,  559,  587,  613,  637,  659,
    680,  717,  749,  777,  801,  823,  842,  859,  874,  899,  919,  936,
    949,  960,  969,  977,  983,  994,  1001, 1006, 1010, 1013, 1015, 1017,
    1018, 1020, 1022, 1022, 1023, 1023, 1023, 1024,
  };
  static const int xsq_iq_q10[] = {
    0,      4,      8,      12,     16,     20,     24,     28,     32,
    40,     48,     56,     64,     72,     80,     88,     96,     112,
    128,    144,    160,    176,    192,    208,    224,    256,    288,
    320,    352,    384,    416,    448,    480,    544,    608,    672,
    736,    800,    864,    928,    992,    1120,   1248,   1376,   1504,
    1632,   1760,   1888,   2016,   2272,   2528,   2784,   3040,   3296,
    3552,   3808,   4064,   4576,   5088,   5600,   6112,   6624,   7136,
    7648,   8160,   9184,   10208,  11232,  12256,  13280,  14304,  15328,
    16352,  18400,  20448,  22496,  24544,  26592,  28640,  30688,  32736,
    36832,  40928,  45024,  49120,  53216,  57312,  61408,  65504,  73696,
    81888,  90080,  98272,  106464, 114656, 122848, 131040, 147424, 163808,
    180192, 196576, 212960, 229344, 245728,
  };
  const int tmp = (xsq_q10 >> 2) + 8;
  const int k = get_msb(tmp) - 3;
  const int xq = (k << 3) + ((tmp >> k) & 0x7);
  const int one_q10 = 1 << 10;
  const int a_q10 = ((xsq_q10 - xsq_iq_q10[xq]) << 10) >> (2 + k);
  const int b_q10 = one_q10 - a_q10;
  *r_q10 = (rate_tab_q10[xq] * b_q10 + rate_tab_q10[xq + 1] * a_q10) >> 10;
  *d_q10 = (dist_tab_q10[xq] * b_q10 + dist_tab_q10[xq + 1] * a_q10) >> 10;
}

void av1_model_rd_from_var_lapndz(int64_t var, unsigned int n_log2,
                                  unsigned int qstep, int *rate,
                                  int64_t *dist) {
  // This function models the rate and distortion for a Laplacian
  // source with given variance when quantized with a uniform quantizer
  // with given stepsize. The closed form expressions are in:
  // Hang and Chen, "Source Model for transform video coder and its
  // application - Part I: Fundamental Theory", IEEE Trans. Circ.
  // Sys. for Video Tech., April 1997.
  if (var == 0) {
    *rate = 0;
    *dist = 0;
  } else {
    int d_q10, r_q10;
    static const uint32_t MAX_XSQ_Q10 = 245727;
    const uint64_t xsq_q10_64 =
        (((uint64_t)qstep * qstep << (n_log2 + 10)) + (var >> 1)) / var;
    const int xsq_q10 = (int)AOMMIN(xsq_q10_64, MAX_XSQ_Q10);
    model_rd_norm(xsq_q10, &r_q10, &d_q10);
    *rate = ROUND_POWER_OF_TWO(r_q10 << n_log2, 10 - AV1_PROB_COST_SHIFT);
    *dist = (var * (int64_t)d_q10 + 512) >> 10;
  }
}

static double interp_cubic(const double *p, double x) {
  return p[1] + 0.5 * x *
                    (p[2] - p[0] +
                     x * (2.0 * p[0] - 5.0 * p[1] + 4.0 * p[2] - p[3] +
                          x * (3.0 * (p[1] - p[2]) + p[3] - p[0])));
}

/*
static double interp_bicubic(const double *p, int p_stride, double x,
                             double y) {
  double q[4];
  q[0] = interp_cubic(p, x);
  q[1] = interp_cubic(p + p_stride, x);
  q[2] = interp_cubic(p + 2 * p_stride, x);
  q[3] = interp_cubic(p + 3 * p_stride, x);
  return interp_cubic(q, y);
}
*/

static const uint8_t bsize_curvfit_model_cat_lookup[BLOCK_SIZES_ALL] = {
  0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 0, 0, 1, 1, 2, 2
};

static int sse_norm_curvfit_model_cat_lookup(double sse_norm) {
  return (sse_norm > 16.0);
}

// Models distortion by sse using a logistic function on
// l = log2(sse / q^2) as:
// dbysse = 16 / (1 + k exp(l + c))
static double get_dbysse_logistic(double l, double c, double k) {
  const double A = 16.0;
  const double dbysse = A / (1 + k * exp(l + c));
  return dbysse;
}

// Models rate using a clamped linear function on
// l = log2(sse / q^2) as:
// rate = max(0, a + b * l)
static double get_rate_clamplinear(double l, double a, double b) {
  const double rate = a + b * l;
  return (rate < 0 ? 0 : rate);
}

static const uint8_t bsize_surffit_model_cat_lookup[BLOCK_SIZES_ALL] = {
  0, 0, 0, 0, 1, 1, 2, 3, 3, 4, 5, 5, 6, 7, 7, 8, 0, 0, 2, 2, 4, 4
};

static const double surffit_rate_params[9][4] = {
  {
      638.390212,
      2.253108,
      166.585650,
      -3.939401,
  },
  {
      5.256905,
      81.997240,
      -1.321771,
      17.694216,
  },
  {
      -74.193045,
      72.431868,
      -19.033152,
      15.407276,
  },
  {
      416.770113,
      14.794188,
      167.686830,
      -6.997756,
  },
  {
      378.511276,
      9.558376,
      154.658843,
      -6.635663,
  },
  {
      277.818787,
      4.413180,
      150.317637,
      -9.893038,
  },
  {
      142.212132,
      11.542038,
      94.393964,
      -5.518517,
  },
  {
      219.100256,
      4.007421,
      108.932852,
      -6.981310,
  },
  {
      222.261971,
      3.251049,
      95.972916,
      -5.609789,
  },
};

static const double surffit_dist_params[7] = { 1.475844,  4.328362, -5.680233,
                                               -0.500994, 0.554585, 4.839478,
                                               -0.695837 };

static void rate_surffit_model_params_lookup(BLOCK_SIZE bsize, double xm,
                                             double *rpar) {
  const int cat = bsize_surffit_model_cat_lookup[bsize];
  rpar[0] = surffit_rate_params[cat][0] + surffit_rate_params[cat][1] * xm;
  rpar[1] = surffit_rate_params[cat][2] + surffit_rate_params[cat][3] * xm;
}

static void dist_surffit_model_params_lookup(BLOCK_SIZE bsize, double xm,
                                             double *dpar) {
  (void)bsize;
  const double *params = surffit_dist_params;
  dpar[0] = params[0] + params[1] / (1 + exp((xm + params[2]) * params[3]));
  dpar[1] = params[4] + params[5] * exp(params[6] * xm);
}

void av1_model_rd_surffit(BLOCK_SIZE bsize, double sse_norm, double xm,
                          double yl, double *rate_f, double *distbysse_f) {
  (void)sse_norm;
  double rpar[2], dpar[2];
  rate_surffit_model_params_lookup(bsize, xm, rpar);
  dist_surffit_model_params_lookup(bsize, xm, dpar);

  *rate_f = get_rate_clamplinear(yl, rpar[0], rpar[1]);
  *distbysse_f = get_dbysse_logistic(yl, dpar[0], dpar[1]);
}

static const double interp_rgrid_curv[4][65] = {
  {
      0.000000,    0.000000,    0.000000,    0.000000,    0.000000,
      0.000000,    0.000000,    0.000000,    0.000000,    0.000000,
      0.000000,    23.801499,   28.387688,   33.388795,   42.298282,
      41.525408,   51.597692,   49.566271,   54.632979,   60.321507,
      67.730678,   75.766165,   85.324032,   96.600012,   120.839562,
      173.917577,  255.974908,  354.107573,  458.063476,  562.345966,
      668.568424,  772.072881,  878.598490,  982.202274,  1082.708946,
      1188.037853, 1287.702240, 1395.588773, 1490.825830, 1584.231230,
      1691.386090, 1766.822555, 1869.630904, 1926.743565, 2002.949495,
      2047.431137, 2138.486068, 2154.743767, 2209.242472, 2277.593051,
      2290.996432, 2307.452938, 2343.567091, 2397.654644, 2469.425868,
      2558.591037, 2664.860422, 2787.944296, 2927.552932, 3083.396602,
      3255.185579, 3442.630134, 3645.440541, 3863.327072, 4096.000000,
  },
  {
      0.000000,    0.000000,    0.000000,    0.000000,    0.000000,
      0.000000,    0.000000,    0.000000,    0.000000,    0.000000,
      0.000000,    8.998436,    9.439592,    9.731837,    10.865931,
      11.561347,   12.578139,   14.205101,   16.770584,   19.094853,
      21.330863,   23.298907,   26.901921,   34.501017,   57.891733,
      112.234763,  194.853189,  288.302032,  380.499422,  472.625309,
      560.226809,  647.928463,  734.155122,  817.489721,  906.265783,
      999.260562,  1094.489206, 1197.062998, 1293.296825, 1378.926484,
      1472.760990, 1552.663779, 1635.196884, 1692.451951, 1759.741063,
      1822.162720, 1916.515921, 1966.686071, 2031.647506, 2033.700134,
      2087.847688, 2161.688858, 2242.536028, 2334.023491, 2436.337802,
      2549.665519, 2674.193198, 2810.107395, 2957.594666, 3116.841567,
      3288.034655, 3471.360486, 3667.005616, 3875.156602, 4096.000000,
  },
  {
      0.000000,    0.000000,    0.000000,    0.000000,    0.000000,
      0.000000,    0.000000,    0.000000,    0.000000,    0.000000,
      0.000000,    2.377584,    2.557185,    2.732445,    2.851114,
      3.281800,    3.765589,    4.342578,    5.145582,    5.611038,
      6.642238,    7.945977,    11.800522,   17.346624,   37.501413,
      87.216800,   165.860942,  253.865564,  332.039345,  408.518863,
      478.120452,  547.268590,  616.067676,  680.022540,  753.863541,
      834.529973,  919.489191,  1008.264989, 1092.230318, 1173.971886,
      1249.514122, 1330.510941, 1399.523249, 1466.923387, 1530.533471,
      1586.515722, 1695.197774, 1746.648696, 1837.136959, 1909.075485,
      1975.074651, 2060.159200, 2155.335095, 2259.762505, 2373.710437,
      2497.447898, 2631.243895, 2775.367434, 2930.087523, 3095.673170,
      3272.393380, 3460.517161, 3660.313520, 3872.051464, 4096.000000,
  },
  {
      0.000000,    0.000000,    0.000000,    0.000000,    0.000000,
      0.000000,    0.000000,    0.000000,    0.000000,    0.000000,
      0.000000,    0.296997,    0.342545,    0.403097,    0.472889,
      0.614483,    0.842937,    1.050824,    1.326663,    1.717750,
      2.530591,    3.582302,    6.995373,    9.973335,    24.042464,
      56.598240,   113.680735,  180.018689,  231.050567,  266.101082,
      294.957934,  323.326511,  349.434429,  380.443211,  408.171987,
      441.214916,  475.716772,  512.900000,  551.186939,  592.364455,
      624.527378,  661.940693,  679.185473,  724.800679,  764.781792,
      873.050019,  950.299001,  939.292954,  1052.406153, 1033.893184,
      1112.182406, 1219.174326, 1337.296681, 1471.648357, 1622.492809,
      1790.093491, 1974.713858, 2176.617364, 2396.067465, 2633.327614,
      2888.661266, 3162.331876, 3454.602899, 3765.737789, 4096.000000,
  },
};

static const double interp_dgrid_curv[2][65] = {
  {
      16.000000, 15.962891, 15.925174, 15.886888, 15.848074, 15.808770,
      15.769015, 15.728850, 15.688313, 15.647445, 15.606284, 15.564870,
      15.525918, 15.483820, 15.373330, 15.126844, 14.637442, 14.184387,
      13.560070, 12.880717, 12.165995, 11.378144, 10.438769, 9.130790,
      7.487633,  5.688649,  4.267515,  3.196300,  2.434201,  1.834064,
      1.369920,  1.035921,  0.775279,  0.574895,  0.427232,  0.314123,
      0.233236,  0.171440,  0.128188,  0.092762,  0.067569,  0.049324,
      0.036330,  0.027008,  0.019853,  0.015539,  0.011093,  0.008733,
      0.007624,  0.008105,  0.005427,  0.004065,  0.003427,  0.002848,
      0.002328,  0.001865,  0.001457,  0.001103,  0.000801,  0.000550,
      0.000348,  0.000193,  0.000085,  0.000021,  0.000000,
  },
  {
      16.000000, 15.996116, 15.984769, 15.966413, 15.941505, 15.910501,
      15.873856, 15.832026, 15.785466, 15.734633, 15.679981, 15.621967,
      15.560961, 15.460157, 15.288367, 15.052462, 14.466922, 13.921212,
      13.073692, 12.222005, 11.237799, 9.985848,  8.898823,  7.423519,
      5.995325,  4.773152,  3.744032,  2.938217,  2.294526,  1.762412,
      1.327145,  1.020728,  0.765535,  0.570548,  0.425833,  0.313825,
      0.232959,  0.171324,  0.128174,  0.092750,  0.067558,  0.049319,
      0.036330,  0.027008,  0.019853,  0.015539,  0.011093,  0.008733,
      0.007624,  0.008105,  0.005427,  0.004065,  0.003427,  0.002848,
      0.002328,  0.001865,  0.001457,  0.001103,  0.000801,  0.000550,
      0.000348,  0.000193,  0.000085,  0.000021,  -0.000000,
  },
};

void av1_model_rd_curvfit(BLOCK_SIZE bsize, double sse_norm, double xqr,
                          double *rate_f, double *distbysse_f) {
  const double x_start = -15.5;
  const double x_end = 16.5;
  const double x_step = 0.5;
  const double epsilon = 1e-6;
  const int rcat = bsize_curvfit_model_cat_lookup[bsize];
  const int dcat = sse_norm_curvfit_model_cat_lookup(sse_norm);
  (void)x_end;

  xqr = AOMMAX(xqr, x_start + x_step + epsilon);
  xqr = AOMMIN(xqr, x_end - x_step - epsilon);
  const double x = (xqr - x_start) / x_step;
  const int xi = (int)floor(x);
  const double xo = x - xi;

  assert(xi > 0);

  const double *prate = &interp_rgrid_curv[rcat][(xi - 1)];
  *rate_f = interp_cubic(prate, xo);
  const double *pdist = &interp_dgrid_curv[dcat][(xi - 1)];
  *distbysse_f = interp_cubic(pdist, xo);
}

static void get_entropy_contexts_plane(BLOCK_SIZE plane_bsize,
                                       const struct macroblockd_plane *pd,
                                       ENTROPY_CONTEXT t_above[MAX_MIB_SIZE],
                                       ENTROPY_CONTEXT t_left[MAX_MIB_SIZE]) {
  const int num_4x4_w = block_size_wide[plane_bsize] >> tx_size_wide_log2[0];
  const int num_4x4_h = block_size_high[plane_bsize] >> tx_size_high_log2[0];
  const ENTROPY_CONTEXT *const above = pd->above_context;
  const ENTROPY_CONTEXT *const left = pd->left_context;

  memcpy(t_above, above, sizeof(ENTROPY_CONTEXT) * num_4x4_w);
  memcpy(t_left, left, sizeof(ENTROPY_CONTEXT) * num_4x4_h);
}

void av1_get_entropy_contexts(BLOCK_SIZE bsize,
                              const struct macroblockd_plane *pd,
                              ENTROPY_CONTEXT t_above[MAX_MIB_SIZE],
                              ENTROPY_CONTEXT t_left[MAX_MIB_SIZE]) {
  assert(bsize < BLOCK_SIZES_ALL);
  const BLOCK_SIZE plane_bsize =
      get_plane_block_size(bsize, pd->subsampling_x, pd->subsampling_y);
  get_entropy_contexts_plane(plane_bsize, pd, t_above, t_left);
}

void av1_mv_pred(const AV1_COMP *cpi, MACROBLOCK *x, uint8_t *ref_y_buffer,
                 int ref_y_stride, int ref_frame, BLOCK_SIZE block_size) {
  int i;
  int zero_seen = 0;
  int best_sad = INT_MAX;
  int this_sad = INT_MAX;
  int max_mv = 0;
  uint8_t *src_y_ptr = x->plane[0].src.buf;
  uint8_t *ref_y_ptr;
  MV pred_mv[MAX_MV_REF_CANDIDATES + 1];
  int num_mv_refs = 0;
  const MV_REFERENCE_FRAME ref_frames[2] = { ref_frame, NONE_FRAME };
  const int_mv ref_mv =
      av1_get_ref_mv_from_stack(0, ref_frames, 0, x->mbmi_ext);
  const int_mv ref_mv1 =
      av1_get_ref_mv_from_stack(0, ref_frames, 1, x->mbmi_ext);

  pred_mv[num_mv_refs++] = ref_mv.as_mv;
  if (ref_mv.as_int != ref_mv1.as_int) {
    pred_mv[num_mv_refs++] = ref_mv1.as_mv;
  }
  if (cpi->sf.adaptive_motion_search && block_size < x->max_partition_size)
    pred_mv[num_mv_refs++] = x->pred_mv[ref_frame];

  assert(num_mv_refs <= (int)(sizeof(pred_mv) / sizeof(pred_mv[0])));

  // Get the sad for each candidate reference mv.
  for (i = 0; i < num_mv_refs; ++i) {
    const MV *this_mv = &pred_mv[i];
    int fp_row, fp_col;
    fp_row = (this_mv->row + 3 + (this_mv->row >= 0)) >> 3;
    fp_col = (this_mv->col + 3 + (this_mv->col >= 0)) >> 3;
    max_mv = AOMMAX(max_mv, AOMMAX(abs(this_mv->row), abs(this_mv->col)) >> 3);

    if (fp_row == 0 && fp_col == 0 && zero_seen) continue;
    zero_seen |= (fp_row == 0 && fp_col == 0);

    ref_y_ptr = &ref_y_buffer[ref_y_stride * fp_row + fp_col];
    // Find sad for current vector.
    this_sad = cpi->fn_ptr[block_size].sdf(src_y_ptr, x->plane[0].src.stride,
                                           ref_y_ptr, ref_y_stride);
    // Note if it is the best so far.
    if (this_sad < best_sad) {
      best_sad = this_sad;
    }
  }

  // Note the index of the mv that worked best in the reference list.
  x->max_mv_context[ref_frame] = max_mv;
  x->pred_mv_sad[ref_frame] = best_sad;
}

void av1_setup_pred_block(const MACROBLOCKD *xd,
                          struct buf_2d dst[MAX_MB_PLANE],
                          const YV12_BUFFER_CONFIG *src, int mi_row, int mi_col,
                          const struct scale_factors *scale,
                          const struct scale_factors *scale_uv,
                          const int num_planes) {
  int i;

  dst[0].buf = src->y_buffer;
  dst[0].stride = src->y_stride;
  dst[1].buf = src->u_buffer;
  dst[2].buf = src->v_buffer;
  dst[1].stride = dst[2].stride = src->uv_stride;

  for (i = 0; i < num_planes; ++i) {
    setup_pred_plane(dst + i, xd->mi[0]->sb_type, dst[i].buf,
                     i ? src->uv_crop_width : src->y_crop_width,
                     i ? src->uv_crop_height : src->y_crop_height,
                     dst[i].stride, mi_row, mi_col, i ? scale_uv : scale,
                     xd->plane[i].subsampling_x, xd->plane[i].subsampling_y);
  }
}

int av1_raster_block_offset(BLOCK_SIZE plane_bsize, int raster_block,
                            int stride) {
  const int bw = mi_size_wide_log2[plane_bsize];
  const int y = 4 * (raster_block >> bw);
  const int x = 4 * (raster_block & ((1 << bw) - 1));
  return y * stride + x;
}

int16_t *av1_raster_block_offset_int16(BLOCK_SIZE plane_bsize, int raster_block,
                                       int16_t *base) {
  const int stride = block_size_wide[plane_bsize];
  return base + av1_raster_block_offset(plane_bsize, raster_block, stride);
}

YV12_BUFFER_CONFIG *av1_get_scaled_ref_frame(const AV1_COMP *cpi,
                                             int ref_frame) {
  assert(ref_frame >= LAST_FRAME && ref_frame <= ALTREF_FRAME);
  RefCntBuffer *const scaled_buf = cpi->scaled_ref_buf[ref_frame - 1];
  const RefCntBuffer *const ref_buf =
      get_ref_frame_buf(&cpi->common, ref_frame);
  return (scaled_buf != ref_buf && scaled_buf != NULL) ? &scaled_buf->buf
                                                       : NULL;
}

int av1_get_switchable_rate(const AV1_COMMON *const cm, MACROBLOCK *x,
                            const MACROBLOCKD *xd) {
  if (cm->interp_filter == SWITCHABLE) {
    const MB_MODE_INFO *const mbmi = xd->mi[0];
    int inter_filter_cost = 0;
    int dir;

    for (dir = 0; dir < 2; ++dir) {
      const int ctx = av1_get_pred_context_switchable_interp(xd, dir);
      const InterpFilter filter =
          av1_extract_interp_filter(mbmi->interp_filters, dir);
      inter_filter_cost += x->switchable_interp_costs[ctx][filter];
    }
    return SWITCHABLE_INTERP_RATE_FACTOR * inter_filter_cost;
  } else {
    return 0;
  }
}

void av1_set_rd_speed_thresholds(AV1_COMP *cpi) {
  int i;
  RD_OPT *const rd = &cpi->rd;
  SPEED_FEATURES *const sf = &cpi->sf;

  // Set baseline threshold values.
  for (i = 0; i < MAX_MODES; ++i) rd->thresh_mult[i] = cpi->oxcf.mode == 0;

  if (sf->adaptive_rd_thresh) {
    rd->thresh_mult[THR_NEARESTMV] = 300;
    rd->thresh_mult[THR_NEARESTL2] = 300;
    rd->thresh_mult[THR_NEARESTL3] = 300;
    rd->thresh_mult[THR_NEARESTB] = 300;
    rd->thresh_mult[THR_NEARESTA2] = 300;
    rd->thresh_mult[THR_NEARESTA] = 300;
    rd->thresh_mult[THR_NEARESTG] = 300;
  } else {
    rd->thresh_mult[THR_NEARESTMV] = 0;
    rd->thresh_mult[THR_NEARESTL2] = 0;
    rd->thresh_mult[THR_NEARESTL3] = 100;
    rd->thresh_mult[THR_NEARESTB] = 0;
    rd->thresh_mult[THR_NEARESTA2] = 0;
    rd->thresh_mult[THR_NEARESTA] = 0;
    rd->thresh_mult[THR_NEARESTG] = 0;
  }

  rd->thresh_mult[THR_NEWMV] += 1000;
  rd->thresh_mult[THR_NEWL2] += 1000;
  rd->thresh_mult[THR_NEWL3] += 1000;
  rd->thresh_mult[THR_NEWB] += 1000;
  rd->thresh_mult[THR_NEWA2] = 1100;
  rd->thresh_mult[THR_NEWA] += 1000;
  rd->thresh_mult[THR_NEWG] += 1000;

  rd->thresh_mult[THR_NEARMV] += 1000;
  rd->thresh_mult[THR_NEARL2] += 1000;
  rd->thresh_mult[THR_NEARL3] += 1000;
  rd->thresh_mult[THR_NEARB] += 1000;
  rd->thresh_mult[THR_NEARA2] = 1000;
  rd->thresh_mult[THR_NEARA] += 1000;
  rd->thresh_mult[THR_NEARG] += 1000;

  rd->thresh_mult[THR_GLOBALMV] += 2200;
  rd->thresh_mult[THR_GLOBALL2] += 2000;
  rd->thresh_mult[THR_GLOBALL3] += 2000;
  rd->thresh_mult[THR_GLOBALB] += 2400;
  rd->thresh_mult[THR_GLOBALA2] = 2000;
  rd->thresh_mult[THR_GLOBALG] += 2000;
  rd->thresh_mult[THR_GLOBALA] += 2400;

  rd->thresh_mult[THR_COMP_NEAREST_NEARESTLA] += 1100;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTL2A] += 1000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTL3A] += 800;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTGA] += 900;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTLB] += 1000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTL2B] += 1000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTL3B] += 1000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTGB] += 1000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTLA2] += 1000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTL2A2] += 1000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTL3A2] += 1000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTGA2] += 1000;

  rd->thresh_mult[THR_COMP_NEAREST_NEARESTLL2] += 2000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTLL3] += 2000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTLG] += 2000;
  rd->thresh_mult[THR_COMP_NEAREST_NEARESTBA] += 2000;

  rd->thresh_mult[THR_COMP_NEAR_NEARLA] += 1200;
  rd->thresh_mult[THR_COMP_NEAREST_NEWLA] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTLA] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWLA] += 1530;
  rd->thresh_mult[THR_COMP_NEW_NEARLA] += 1870;
  rd->thresh_mult[THR_COMP_NEW_NEWLA] += 2400;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALLA] += 2750;

  rd->thresh_mult[THR_COMP_NEAR_NEARL2A] += 1200;
  rd->thresh_mult[THR_COMP_NEAREST_NEWL2A] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTL2A] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWL2A] += 1870;
  rd->thresh_mult[THR_COMP_NEW_NEARL2A] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWL2A] += 1800;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALL2A] += 2500;

  rd->thresh_mult[THR_COMP_NEAR_NEARL3A] += 1200;
  rd->thresh_mult[THR_COMP_NEAREST_NEWL3A] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTL3A] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWL3A] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEARL3A] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWL3A] += 2000;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALL3A] += 3000;

  rd->thresh_mult[THR_COMP_NEAR_NEARGA] += 1320;
  rd->thresh_mult[THR_COMP_NEAREST_NEWGA] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTGA] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWGA] += 2040;
  rd->thresh_mult[THR_COMP_NEW_NEARGA] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWGA] += 2000;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALGA] += 2250;

  rd->thresh_mult[THR_COMP_NEAR_NEARLB] += 1200;
  rd->thresh_mult[THR_COMP_NEAREST_NEWLB] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTLB] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWLB] += 1360;
  rd->thresh_mult[THR_COMP_NEW_NEARLB] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWLB] += 2400;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALLB] += 2250;

  rd->thresh_mult[THR_COMP_NEAR_NEARL2B] += 1200;
  rd->thresh_mult[THR_COMP_NEAREST_NEWL2B] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTL2B] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWL2B] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEARL2B] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWL2B] += 2000;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALL2B] += 2500;

  rd->thresh_mult[THR_COMP_NEAR_NEARL3B] += 1200;
  rd->thresh_mult[THR_COMP_NEAREST_NEWL3B] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTL3B] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWL3B] += 1870;
  rd->thresh_mult[THR_COMP_NEW_NEARL3B] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWL3B] += 2000;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALL3B] += 2500;

  rd->thresh_mult[THR_COMP_NEAR_NEARGB] += 1200;
  rd->thresh_mult[THR_COMP_NEAREST_NEWGB] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTGB] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWGB] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEARGB] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWGB] += 2000;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALGB] += 2500;

  rd->thresh_mult[THR_COMP_NEAR_NEARLA2] += 1200;
  rd->thresh_mult[THR_COMP_NEAREST_NEWLA2] += 1800;
  rd->thresh_mult[THR_COMP_NEW_NEARESTLA2] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWLA2] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEARLA2] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWLA2] += 2000;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALLA2] += 2500;

  rd->thresh_mult[THR_COMP_NEAR_NEARL2A2] += 1200;
  rd->thresh_mult[THR_COMP_NEAREST_NEWL2A2] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTL2A2] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWL2A2] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEARL2A2] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWL2A2] += 2000;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALL2A2] += 2500;

  rd->thresh_mult[THR_COMP_NEAR_NEARL3A2] += 1440;
  rd->thresh_mult[THR_COMP_NEAREST_NEWL3A2] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTL3A2] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWL3A2] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEARL3A2] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWL3A2] += 2000;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALL3A2] += 2500;

  rd->thresh_mult[THR_COMP_NEAR_NEARGA2] += 1200;
  rd->thresh_mult[THR_COMP_NEAREST_NEWGA2] += 1500;
  rd->thresh_mult[THR_COMP_NEW_NEARESTGA2] += 1500;
  rd->thresh_mult[THR_COMP_NEAR_NEWGA2] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEARGA2] += 1700;
  rd->thresh_mult[THR_COMP_NEW_NEWGA2] += 2000;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALGA2] += 2750;

  rd->thresh_mult[THR_COMP_NEAR_NEARLL2] += 1600;
  rd->thresh_mult[THR_COMP_NEAREST_NEWLL2] += 2000;
  rd->thresh_mult[THR_COMP_NEW_NEARESTLL2] += 2000;
  rd->thresh_mult[THR_COMP_NEAR_NEWLL2] += 2640;
  rd->thresh_mult[THR_COMP_NEW_NEARLL2] += 2200;
  rd->thresh_mult[THR_COMP_NEW_NEWLL2] += 2400;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALLL2] += 3200;

  rd->thresh_mult[THR_COMP_NEAR_NEARLL3] += 1600;
  rd->thresh_mult[THR_COMP_NEAREST_NEWLL3] += 2000;
  rd->thresh_mult[THR_COMP_NEW_NEARESTLL3] += 1800;
  rd->thresh_mult[THR_COMP_NEAR_NEWLL3] += 2200;
  rd->thresh_mult[THR_COMP_NEW_NEARLL3] += 2200;
  rd->thresh_mult[THR_COMP_NEW_NEWLL3] += 2400;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALLL3] += 3200;

  rd->thresh_mult[THR_COMP_NEAR_NEARLG] += 1760;
  rd->thresh_mult[THR_COMP_NEAREST_NEWLG] += 2400;
  rd->thresh_mult[THR_COMP_NEW_NEARESTLG] += 2000;
  rd->thresh_mult[THR_COMP_NEAR_NEWLG] += 1760;
  rd->thresh_mult[THR_COMP_NEW_NEARLG] += 2640;
  rd->thresh_mult[THR_COMP_NEW_NEWLG] += 2400;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALLG] += 3200;

  rd->thresh_mult[THR_COMP_NEAR_NEARBA] += 1600;
  rd->thresh_mult[THR_COMP_NEAREST_NEWBA] += 2000;
  rd->thresh_mult[THR_COMP_NEW_NEARESTBA] += 2000;
  rd->thresh_mult[THR_COMP_NEAR_NEWBA] += 2200;
  rd->thresh_mult[THR_COMP_NEW_NEARBA] += 1980;
  rd->thresh_mult[THR_COMP_NEW_NEWBA] += 2640;
  rd->thresh_mult[THR_COMP_GLOBAL_GLOBALBA] += 3200;

  rd->thresh_mult[THR_DC] += 1000;
  rd->thresh_mult[THR_PAETH] += 1000;
  rd->thresh_mult[THR_SMOOTH] += 2200;
  rd->thresh_mult[THR_SMOOTH_V] += 2000;
  rd->thresh_mult[THR_SMOOTH_H] += 2000;
  rd->thresh_mult[THR_H_PRED] += 2000;
  rd->thresh_mult[THR_V_PRED] += 1800;
  rd->thresh_mult[THR_D135_PRED] += 2500;
  rd->thresh_mult[THR_D203_PRED] += 2000;
  rd->thresh_mult[THR_D157_PRED] += 2500;
  rd->thresh_mult[THR_D67_PRED] += 2000;
  rd->thresh_mult[THR_D113_PRED] += 2500;
  rd->thresh_mult[THR_D45_PRED] += 2500;
}

void av1_update_rd_thresh_fact(const AV1_COMMON *const cm,
                               int (*factor_buf)[MAX_MODES], int rd_thresh,
                               int bsize, int best_mode_index) {
  if (rd_thresh > 0) {
    const int top_mode = MAX_MODES;
    int mode;
    for (mode = 0; mode < top_mode; ++mode) {
      const BLOCK_SIZE min_size = AOMMAX(bsize - 1, BLOCK_4X4);
      const BLOCK_SIZE max_size =
          AOMMIN(bsize + 2, (int)cm->seq_params.sb_size);
      BLOCK_SIZE bs;
      for (bs = min_size; bs <= max_size; ++bs) {
        int *const fact = &factor_buf[bs][mode];
        if (mode == best_mode_index) {
          *fact -= (*fact >> 4);
        } else {
          *fact = AOMMIN(*fact + RD_THRESH_INC, rd_thresh * RD_THRESH_MAX_FACT);
        }
      }
    }
  }
}

int av1_get_intra_cost_penalty(int qindex, int qdelta,
                               aom_bit_depth_t bit_depth) {
  const int q = av1_dc_quant_Q3(qindex, qdelta, bit_depth);
  switch (bit_depth) {
    case AOM_BITS_8: return 20 * q;
    case AOM_BITS_10: return 5 * q;
    case AOM_BITS_12: return ROUND_POWER_OF_TWO(5 * q, 2);
    default:
      assert(0 && "bit_depth should be AOM_BITS_8, AOM_BITS_10 or AOM_BITS_12");
      return -1;
  }
}