/*
 * 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 <limits.h>
#include <math.h>
#include <stdio.h>

#include "./av1_rtcd.h"
#include "./aom_dsp_rtcd.h"
#include "./aom_config.h"

#include "aom_dsp/aom_dsp_common.h"
#include "aom_dsp/binary_codes_writer.h"
#include "aom_ports/mem.h"
#include "aom_ports/aom_timer.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/idct.h"
#include "av1/common/mv.h"
#include "av1/common/mvref_common.h"
#include "av1/common/pred_common.h"
#include "av1/common/quant_common.h"
#include "av1/common/reconintra.h"
#include "av1/common/reconinter.h"
#include "av1/common/seg_common.h"
#include "av1/common/tile_common.h"

#include "av1/encoder/aq_complexity.h"
#include "av1/encoder/aq_cyclicrefresh.h"
#include "av1/encoder/aq_variance.h"
#if CONFIG_SUPERTX
#include "av1/encoder/cost.h"
#endif
#if CONFIG_GLOBAL_MOTION || CONFIG_WARPED_MOTION
#include "av1/common/warped_motion.h"
#endif  // CONFIG_GLOBAL_MOTION || CONFIG_WARPED_MOTION
#if CONFIG_GLOBAL_MOTION
#include "av1/encoder/global_motion.h"
#endif  // CONFIG_GLOBAL_MOTION
#include "av1/encoder/encodeframe.h"
#include "av1/encoder/encodemb.h"
#include "av1/encoder/encodemv.h"
#if CONFIG_LV_MAP
#include "av1/encoder/encodetxb.h"
#endif
#include "av1/encoder/ethread.h"
#include "av1/encoder/extend.h"
#include "av1/encoder/rd.h"
#include "av1/encoder/rdopt.h"
#include "av1/encoder/segmentation.h"
#include "av1/encoder/tokenize.h"
#if CONFIG_PVQ
#include "av1/common/pvq.h"
#include "av1/encoder/pvq_encoder.h"
#endif
#if CONFIG_HIGHBITDEPTH
#define IF_HBD(...) __VA_ARGS__
#else
#define IF_HBD(...)
#endif  // CONFIG_HIGHBITDEPTH

static void encode_superblock(const AV1_COMP *const cpi, ThreadData *td,
                              TOKENEXTRA **t, RUN_TYPE dry_run, int mi_row,
                              int mi_col, BLOCK_SIZE bsize, int *rate);

#if CONFIG_SUPERTX
static int check_intra_b(PICK_MODE_CONTEXT *ctx);

static int check_intra_sb(const AV1_COMP *cpi, const TileInfo *const tile,
                          int mi_row, int mi_col, BLOCK_SIZE bsize,
                          PC_TREE *pc_tree);
static void predict_superblock(const AV1_COMP *const cpi, ThreadData *td,
#if CONFIG_EXT_INTER
                               int mi_row_ori, int mi_col_ori,
#endif  // CONFIG_EXT_INTER
                               int mi_row_pred, int mi_col_pred,
                               BLOCK_SIZE bsize_pred, int b_sub8x8, int block);
static int check_supertx_sb(BLOCK_SIZE bsize, TX_SIZE supertx_size,
                            PC_TREE *pc_tree);
static void predict_sb_complex(const AV1_COMP *const cpi, ThreadData *td,
                               const TileInfo *const tile, int mi_row,
                               int mi_col, int mi_row_ori, int mi_col_ori,
                               RUN_TYPE dry_run, BLOCK_SIZE bsize,
                               BLOCK_SIZE top_bsize, uint8_t *dst_buf[3],
                               int dst_stride[3], PC_TREE *pc_tree);
static void update_state_sb_supertx(const AV1_COMP *const cpi, ThreadData *td,
                                    const TileInfo *const tile, int mi_row,
                                    int mi_col, BLOCK_SIZE bsize,
                                    RUN_TYPE dry_run, PC_TREE *pc_tree);
static void rd_supertx_sb(const AV1_COMP *const cpi, ThreadData *td,
                          const TileInfo *const tile, int mi_row, int mi_col,
                          BLOCK_SIZE bsize, int *tmp_rate, int64_t *tmp_dist,
                          TX_TYPE *best_tx, PC_TREE *pc_tree);
#endif  // CONFIG_SUPERTX

// This is used as a reference when computing the source variance for the
//  purposes of activity masking.
// Eventually this should be replaced by custom no-reference routines,
//  which will be faster.
static const uint8_t AV1_VAR_OFFS[MAX_SB_SIZE] = {
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
#if CONFIG_EXT_PARTITION
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128
#endif  // CONFIG_EXT_PARTITION
};

#if CONFIG_HIGHBITDEPTH
static const uint16_t AV1_HIGH_VAR_OFFS_8[MAX_SB_SIZE] = {
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
#if CONFIG_EXT_PARTITION
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
  128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128
#endif  // CONFIG_EXT_PARTITION
};

static const uint16_t AV1_HIGH_VAR_OFFS_10[MAX_SB_SIZE] = {
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
#if CONFIG_EXT_PARTITION
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4,
  128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4, 128 * 4
#endif  // CONFIG_EXT_PARTITION
};

static const uint16_t AV1_HIGH_VAR_OFFS_12[MAX_SB_SIZE] = {
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16,
#if CONFIG_EXT_PARTITION
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16, 128 * 16,
  128 * 16
#endif  // CONFIG_EXT_PARTITION
};
#endif  // CONFIG_HIGHBITDEPTH

unsigned int av1_get_sby_perpixel_variance(const AV1_COMP *cpi,
                                           const struct buf_2d *ref,
                                           BLOCK_SIZE bs) {
  unsigned int sse;
  const unsigned int var =
      cpi->fn_ptr[bs].vf(ref->buf, ref->stride, AV1_VAR_OFFS, 0, &sse);
  return ROUND_POWER_OF_TWO(var, num_pels_log2_lookup[bs]);
}

#if CONFIG_HIGHBITDEPTH
unsigned int av1_high_get_sby_perpixel_variance(const AV1_COMP *cpi,
                                                const struct buf_2d *ref,
                                                BLOCK_SIZE bs, int bd) {
  unsigned int var, sse;
  switch (bd) {
    case 10:
      var =
          cpi->fn_ptr[bs].vf(ref->buf, ref->stride,
                             CONVERT_TO_BYTEPTR(AV1_HIGH_VAR_OFFS_10), 0, &sse);
      break;
    case 12:
      var =
          cpi->fn_ptr[bs].vf(ref->buf, ref->stride,
                             CONVERT_TO_BYTEPTR(AV1_HIGH_VAR_OFFS_12), 0, &sse);
      break;
    case 8:
    default:
      var =
          cpi->fn_ptr[bs].vf(ref->buf, ref->stride,
                             CONVERT_TO_BYTEPTR(AV1_HIGH_VAR_OFFS_8), 0, &sse);
      break;
  }
  return ROUND_POWER_OF_TWO(var, num_pels_log2_lookup[bs]);
}
#endif  // CONFIG_HIGHBITDEPTH

static unsigned int get_sby_perpixel_diff_variance(const AV1_COMP *const cpi,
                                                   const struct buf_2d *ref,
                                                   int mi_row, int mi_col,
                                                   BLOCK_SIZE bs) {
  unsigned int sse, var;
  uint8_t *last_y;
  const YV12_BUFFER_CONFIG *last = get_ref_frame_buffer(cpi, LAST_FRAME);

  assert(last != NULL);
  last_y =
      &last->y_buffer[mi_row * MI_SIZE * last->y_stride + mi_col * MI_SIZE];
  var = cpi->fn_ptr[bs].vf(ref->buf, ref->stride, last_y, last->y_stride, &sse);
  return ROUND_POWER_OF_TWO(var, num_pels_log2_lookup[bs]);
}

static BLOCK_SIZE get_rd_var_based_fixed_partition(AV1_COMP *cpi, MACROBLOCK *x,
                                                   int mi_row, int mi_col) {
  unsigned int var = get_sby_perpixel_diff_variance(
      cpi, &x->plane[0].src, mi_row, mi_col, BLOCK_64X64);
  if (var < 8)
    return BLOCK_64X64;
  else if (var < 128)
    return BLOCK_32X32;
  else if (var < 2048)
    return BLOCK_16X16;
  else
    return BLOCK_8X8;
}

// Lighter version of set_offsets that only sets the mode info
// pointers.
static void set_mode_info_offsets(const AV1_COMP *const cpi,
                                  MACROBLOCK *const x, MACROBLOCKD *const xd,
                                  int mi_row, int mi_col) {
  const AV1_COMMON *const cm = &cpi->common;
  const int idx_str = xd->mi_stride * mi_row + mi_col;
  xd->mi = cm->mi_grid_visible + idx_str;
  xd->mi[0] = cm->mi + idx_str;
  x->mbmi_ext = cpi->mbmi_ext_base + (mi_row * cm->mi_cols + mi_col);
}

static void set_offsets_without_segment_id(const AV1_COMP *const cpi,
                                           const TileInfo *const tile,
                                           MACROBLOCK *const x, int mi_row,
                                           int mi_col, BLOCK_SIZE bsize) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  const int mi_width = mi_size_wide[bsize];
  const int mi_height = mi_size_high[bsize];

  set_skip_context(xd, mi_row, mi_col);

  set_mode_info_offsets(cpi, x, xd, mi_row, mi_col);

#if CONFIG_VAR_TX
  xd->above_txfm_context = cm->above_txfm_context + mi_col;
  xd->left_txfm_context =
      xd->left_txfm_context_buffer + (mi_row & MAX_MIB_MASK);
  xd->max_tx_size = max_txsize_lookup[bsize];
#endif

  // Set up destination pointers.
  av1_setup_dst_planes(xd->plane, bsize, get_frame_new_buffer(cm), mi_row,
                       mi_col);

  // Set up limit values for MV components.
  // Mv beyond the range do not produce new/different prediction block.
  x->mv_limits.row_min =
      -(((mi_row + mi_height) * MI_SIZE) + AOM_INTERP_EXTEND);
  x->mv_limits.col_min = -(((mi_col + mi_width) * MI_SIZE) + AOM_INTERP_EXTEND);
  x->mv_limits.row_max = (cm->mi_rows - mi_row) * MI_SIZE + AOM_INTERP_EXTEND;
  x->mv_limits.col_max = (cm->mi_cols - mi_col) * MI_SIZE + AOM_INTERP_EXTEND;

  set_plane_n4(xd, mi_width, mi_height);

  // Set up distance of MB to edge of frame in 1/8th pel units.
  assert(!(mi_col & (mi_width - 1)) && !(mi_row & (mi_height - 1)));
  set_mi_row_col(xd, tile, mi_row, mi_height, mi_col, mi_width,
#if CONFIG_DEPENDENT_HORZTILES
                 cm->dependent_horz_tiles,
#endif  // CONFIG_DEPENDENT_HORZTILES
                 cm->mi_rows, cm->mi_cols);

  // Set up source buffers.
  av1_setup_src_planes(x, cpi->source, mi_row, mi_col);

  // R/D setup.
  x->rddiv = cpi->rd.RDDIV;
  x->rdmult = cpi->rd.RDMULT;

  // required by av1_append_sub8x8_mvs_for_idx() and av1_find_best_ref_mvs()
  xd->tile = *tile;
}

static void set_offsets(const AV1_COMP *const cpi, const TileInfo *const tile,
                        MACROBLOCK *const x, int mi_row, int mi_col,
                        BLOCK_SIZE bsize) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *mbmi;
  const struct segmentation *const seg = &cm->seg;

  set_offsets_without_segment_id(cpi, tile, x, mi_row, mi_col, bsize);

  mbmi = &xd->mi[0]->mbmi;

  // Setup segment ID.
  if (seg->enabled) {
    if (!cpi->vaq_refresh) {
      const uint8_t *const map =
          seg->update_map ? cpi->segmentation_map : cm->last_frame_seg_map;
      mbmi->segment_id = get_segment_id(cm, map, bsize, mi_row, mi_col);
    }
    av1_init_plane_quantizers(cpi, x, mbmi->segment_id);
  } else {
    mbmi->segment_id = 0;
  }

#if CONFIG_SUPERTX
  mbmi->segment_id_supertx = MAX_SEGMENTS;
#endif  // CONFIG_SUPERTX
}

#if CONFIG_SUPERTX
static void set_offsets_supertx(const AV1_COMP *const cpi, ThreadData *td,
                                const TileInfo *const tile, int mi_row,
                                int mi_col, BLOCK_SIZE bsize) {
  MACROBLOCK *const x = &td->mb;
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  const int mi_width = mi_size_wide[bsize];
  const int mi_height = mi_size_high[bsize];
#if CONFIG_DEPENDENT_HORZTILES
  set_mode_info_offsets(cpi, x, xd, mi_row, mi_col, cm->dependent_horz_tiles);
#else
  set_mode_info_offsets(cpi, x, xd, mi_row, mi_col);
#endif

  // Set up distance of MB to edge of frame in 1/8th pel units.
  assert(!(mi_col & (mi_width - 1)) && !(mi_row & (mi_height - 1)));
  set_mi_row_col(xd, tile, mi_row, mi_height, mi_col, mi_width,
#if CONFIG_DEPENDENT_HORZTILES
                 cm->dependent_horz_tiles,
#endif  // CONFIG_DEPENDENT_HORZTILES
                 cm->mi_rows, cm->mi_cols);
}

static void set_offsets_extend(const AV1_COMP *const cpi, ThreadData *td,
                               const TileInfo *const tile, int mi_row_pred,
                               int mi_col_pred, int mi_row_ori, int mi_col_ori,
                               BLOCK_SIZE bsize_pred) {
  // Used in supertx
  // (mi_row_ori, mi_col_ori, bsize_ori): region for mv
  // (mi_row_pred, mi_col_pred, bsize_pred): region to predict
  MACROBLOCK *const x = &td->mb;
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  const int mi_width = mi_size_wide[bsize_pred];
  const int mi_height = mi_size_high[bsize_pred];

#if CONFIG_DEPENDENT_HORZTILES
  set_mode_info_offsets(cpi, x, xd, mi_row_ori, mi_col_ori,
                        cm->dependent_horz_tiles);
#else
  set_mode_info_offsets(cpi, x, xd, mi_row_ori, mi_col_ori);
#endif

  // Set up limit values for MV components.
  // Mv beyond the range do not produce new/different prediction block.
  x->mv_limits.row_min =
      -(((mi_row_pred + mi_height) * MI_SIZE) + AOM_INTERP_EXTEND);
  x->mv_limits.col_min =
      -(((mi_col_pred + mi_width) * MI_SIZE) + AOM_INTERP_EXTEND);
  x->mv_limits.row_max =
      (cm->mi_rows - mi_row_pred) * MI_SIZE + AOM_INTERP_EXTEND;
  x->mv_limits.col_max =
      (cm->mi_cols - mi_col_pred) * MI_SIZE + AOM_INTERP_EXTEND;

// Set up distance of MB to edge of frame in 1/8th pel units.
#if !CONFIG_CB4X4
  assert(!(mi_col_pred & (mi_width - mi_size_wide[BLOCK_8X8])) &&
         !(mi_row_pred & (mi_height - mi_size_high[BLOCK_8X8])));
#endif
  set_mi_row_col(xd, tile, mi_row_pred, mi_height, mi_col_pred, mi_width,
#if CONFIG_DEPENDENT_HORZTILES
                 cm->dependent_horz_tiles,
#endif  // CONFIG_DEPENDENT_HORZTILES
                 cm->mi_rows, cm->mi_cols);
  xd->up_available = (mi_row_ori > tile->mi_row_start);
  xd->left_available = (mi_col_ori > tile->mi_col_start);

  // R/D setup.
  x->rddiv = cpi->rd.RDDIV;
  x->rdmult = cpi->rd.RDMULT;
}

static void set_segment_id_supertx(const AV1_COMP *const cpi,
                                   MACROBLOCK *const x, const int mi_row,
                                   const int mi_col, const BLOCK_SIZE bsize) {
  const AV1_COMMON *cm = &cpi->common;
  const struct segmentation *seg = &cm->seg;
  const int miw = AOMMIN(mi_size_wide[bsize], cm->mi_cols - mi_col);
  const int mih = AOMMIN(mi_size_high[bsize], cm->mi_rows - mi_row);
  const int mi_offset = mi_row * cm->mi_stride + mi_col;
  MODE_INFO **const mip = cm->mi_grid_visible + mi_offset;
  int r, c;
  int seg_id_supertx = MAX_SEGMENTS;

  if (!seg->enabled) {
    seg_id_supertx = 0;
  } else {
    // Find the minimum segment_id
    for (r = 0; r < mih; r++)
      for (c = 0; c < miw; c++)
        seg_id_supertx =
            AOMMIN(mip[r * cm->mi_stride + c]->mbmi.segment_id, seg_id_supertx);
    assert(0 <= seg_id_supertx && seg_id_supertx < MAX_SEGMENTS);

    // Initialize plane quantisers
    av1_init_plane_quantizers(cpi, x, seg_id_supertx);
  }

  // Assign the the segment_id back to segment_id_supertx
  for (r = 0; r < mih; r++)
    for (c = 0; c < miw; c++)
      mip[r * cm->mi_stride + c]->mbmi.segment_id_supertx = seg_id_supertx;
}
#endif  // CONFIG_SUPERTX

static void set_block_size(AV1_COMP *const cpi, MACROBLOCK *const x,
                           MACROBLOCKD *const xd, int mi_row, int mi_col,
                           BLOCK_SIZE bsize) {
  if (cpi->common.mi_cols > mi_col && cpi->common.mi_rows > mi_row) {
    const int mi_width = AOMMAX(mi_size_wide[bsize], mi_size_wide[BLOCK_8X8]);
    const int mi_height = AOMMAX(mi_size_high[bsize], mi_size_high[BLOCK_8X8]);
    for (int r = 0; r < mi_height; ++r) {
      for (int c = 0; c < mi_width; ++c) {
        set_mode_info_offsets(cpi, x, xd, mi_row + r, mi_col + c);
        xd->mi[0]->mbmi.sb_type = bsize;
      }
    }
  }
}

static void set_vt_partitioning(AV1_COMP *cpi, MACROBLOCK *const x,
                                MACROBLOCKD *const xd, VAR_TREE *vt, int mi_row,
                                int mi_col, const int64_t *const threshold,
                                const BLOCK_SIZE *const bsize_min) {
  AV1_COMMON *const cm = &cpi->common;
  const int hbw = mi_size_wide[vt->bsize] / 2;
  const int hbh = mi_size_high[vt->bsize] / 2;
  const int has_cols = mi_col + hbw < cm->mi_cols;
  const int has_rows = mi_row + hbh < cm->mi_rows;

  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) return;

  assert(vt->bsize >= BLOCK_8X8);

  assert(hbh == hbw);

  if (vt->bsize == BLOCK_8X8 && cm->frame_type != KEY_FRAME) {
    set_block_size(cpi, x, xd, mi_row, mi_col, BLOCK_8X8);
    return;
  }

  if (vt->force_split || (!has_cols && !has_rows)) goto split;

  // For bsize=bsize_min (16x16/8x8 for 8x8/4x4 downsampling), select if
  // variance is below threshold, otherwise split will be selected.
  // No check for vert/horiz split as too few samples for variance.
  if (vt->bsize == bsize_min[0]) {
    if (has_cols && has_rows && vt->variances.none.variance < threshold[0]) {
      set_block_size(cpi, x, xd, mi_row, mi_col, vt->bsize);
      return;
    } else {
      BLOCK_SIZE subsize = get_subsize(vt->bsize, PARTITION_SPLIT);
      set_block_size(cpi, x, xd, mi_row, mi_col, subsize);
      if (vt->bsize > BLOCK_8X8) {
        set_block_size(cpi, x, xd, mi_row, mi_col + hbw, subsize);
        set_block_size(cpi, x, xd, mi_row + hbh, mi_col, subsize);
        set_block_size(cpi, x, xd, mi_row + hbh, mi_col + hbw, subsize);
      }
      return;
    }
  } else if (vt->bsize > bsize_min[0]) {
    // For key frame: take split for bsize above 32X32 or very high variance.
    if (cm->frame_type == KEY_FRAME &&
        (vt->bsize > BLOCK_32X32 ||
         vt->variances.none.variance > (threshold[0] << 4))) {
      goto split;
    }
    // If variance is low, take the bsize (no split).
    if (has_cols && has_rows && vt->variances.none.variance < threshold[0]) {
      set_block_size(cpi, x, xd, mi_row, mi_col, vt->bsize);
      return;
    }

    // Check vertical split.
    if (has_rows) {
      BLOCK_SIZE subsize = get_subsize(vt->bsize, PARTITION_VERT);
      if (vt->variances.vert[0].variance < threshold[0] &&
          vt->variances.vert[1].variance < threshold[0] &&
          get_plane_block_size(subsize, &xd->plane[1]) < BLOCK_INVALID) {
        set_block_size(cpi, x, xd, mi_row, mi_col, subsize);
        set_block_size(cpi, x, xd, mi_row, mi_col + hbw, subsize);
        return;
      }
    }
    // Check horizontal split.
    if (has_cols) {
      BLOCK_SIZE subsize = get_subsize(vt->bsize, PARTITION_HORZ);
      if (vt->variances.horz[0].variance < threshold[0] &&
          vt->variances.horz[1].variance < threshold[0] &&
          get_plane_block_size(subsize, &xd->plane[1]) < BLOCK_INVALID) {
        set_block_size(cpi, x, xd, mi_row, mi_col, subsize);
        set_block_size(cpi, x, xd, mi_row + hbh, mi_col, subsize);
        return;
      }
    }
  }

split : {
  set_vt_partitioning(cpi, x, xd, vt->split[0], mi_row, mi_col, threshold + 1,
                      bsize_min + 1);
  set_vt_partitioning(cpi, x, xd, vt->split[1], mi_row, mi_col + hbw,
                      threshold + 1, bsize_min + 1);
  set_vt_partitioning(cpi, x, xd, vt->split[2], mi_row + hbh, mi_col,
                      threshold + 1, bsize_min + 1);
  set_vt_partitioning(cpi, x, xd, vt->split[3], mi_row + hbh, mi_col + hbw,
                      threshold + 1, bsize_min + 1);
  return;
}
}

// Set the variance split thresholds for following the block sizes:
// 0 - threshold_64x64, 1 - threshold_32x32, 2 - threshold_16x16,
// 3 - vbp_threshold_8x8. vbp_threshold_8x8 (to split to 4x4 partition) is
// currently only used on key frame.
static void set_vbp_thresholds(AV1_COMP *cpi, int64_t thresholds[], int q) {
  AV1_COMMON *const cm = &cpi->common;
  const int is_key_frame = (cm->frame_type == KEY_FRAME);
  const int threshold_multiplier = is_key_frame ? 20 : 1;
  const int64_t threshold_base =
      (int64_t)(threshold_multiplier * cpi->y_dequant[q][1]);
  if (is_key_frame) {
    thresholds[1] = threshold_base;
    thresholds[2] = threshold_base >> 2;
    thresholds[3] = threshold_base >> 2;
    thresholds[4] = threshold_base << 2;
  } else {
    thresholds[2] = threshold_base;
    if (cm->width <= 352 && cm->height <= 288) {
      thresholds[1] = threshold_base >> 2;
      thresholds[3] = threshold_base << 3;
    } else {
      thresholds[1] = threshold_base;
      thresholds[2] = (5 * threshold_base) >> 2;
      if (cm->width >= 1920 && cm->height >= 1080)
        thresholds[2] = (7 * threshold_base) >> 2;
      thresholds[3] = threshold_base << cpi->oxcf.speed;
    }
  }
  thresholds[0] = INT64_MIN;
}

void av1_set_variance_partition_thresholds(AV1_COMP *cpi, int q) {
  AV1_COMMON *const cm = &cpi->common;
  SPEED_FEATURES *const sf = &cpi->sf;
  const int is_key_frame = (cm->frame_type == KEY_FRAME);
  if (sf->partition_search_type != VAR_BASED_PARTITION &&
      sf->partition_search_type != REFERENCE_PARTITION) {
    return;
  } else {
    set_vbp_thresholds(cpi, cpi->vbp_thresholds, q);
    // The thresholds below are not changed locally.
    if (is_key_frame) {
      cpi->vbp_threshold_sad = 0;
      cpi->vbp_bsize_min = BLOCK_8X8;
    } else {
      if (cm->width <= 352 && cm->height <= 288)
        cpi->vbp_threshold_sad = 100;
      else
        cpi->vbp_threshold_sad = (cpi->y_dequant[q][1] << 1) > 1000
                                     ? (cpi->y_dequant[q][1] << 1)
                                     : 1000;
      cpi->vbp_bsize_min = BLOCK_16X16;
    }
    cpi->vbp_threshold_minmax = 15 + (q >> 3);
  }
}

// Compute the minmax over the 8x8 subblocks.
static int compute_minmax_8x8(const uint8_t *src, int src_stride,
                              const uint8_t *ref, int ref_stride,
#if CONFIG_HIGHBITDEPTH
                              int highbd,
#endif
                              int pixels_wide, int pixels_high) {
  int k;
  int minmax_max = 0;
  int minmax_min = 255;
  // Loop over the 4 8x8 subblocks.
  for (k = 0; k < 4; k++) {
    const int x8_idx = ((k & 1) << 3);
    const int y8_idx = ((k >> 1) << 3);
    int min = 0;
    int max = 0;
    if (x8_idx < pixels_wide && y8_idx < pixels_high) {
      const int src_offset = y8_idx * src_stride + x8_idx;
      const int ref_offset = y8_idx * ref_stride + x8_idx;
#if CONFIG_HIGHBITDEPTH
      if (highbd) {
        aom_highbd_minmax_8x8(src + src_offset, src_stride, ref + ref_offset,
                              ref_stride, &min, &max);
      } else {
        aom_minmax_8x8(src + src_offset, src_stride, ref + ref_offset,
                       ref_stride, &min, &max);
      }
#else
      aom_minmax_8x8(src + src_offset, src_stride, ref + ref_offset, ref_stride,
                     &min, &max);
#endif
      if ((max - min) > minmax_max) minmax_max = (max - min);
      if ((max - min) < minmax_min) minmax_min = (max - min);
    }
  }
  return (minmax_max - minmax_min);
}

#if CONFIG_HIGHBITDEPTH
static INLINE int avg_4x4(const uint8_t *const src, const int stride,
                          const int highbd) {
  if (highbd) {
    return aom_highbd_avg_4x4(src, stride);
  } else {
    return aom_avg_4x4(src, stride);
  }
}
#else
static INLINE int avg_4x4(const uint8_t *const src, const int stride) {
  return aom_avg_4x4(src, stride);
}
#endif

#if CONFIG_HIGHBITDEPTH
static INLINE int avg_8x8(const uint8_t *const src, const int stride,
                          const int highbd) {
  if (highbd) {
    return aom_highbd_avg_8x8(src, stride);
  } else {
    return aom_avg_8x8(src, stride);
  }
}
#else
static INLINE int avg_8x8(const uint8_t *const src, const int stride) {
  return aom_avg_8x8(src, stride);
}
#endif

static void init_variance_tree(VAR_TREE *const vt,
#if CONFIG_HIGHBITDEPTH
                               const int highbd,
#endif
                               BLOCK_SIZE bsize, BLOCK_SIZE leaf_size,
                               const int width, const int height,
                               const uint8_t *const src, const int src_stride,
                               const uint8_t *const ref, const int ref_stride) {
  assert(bsize >= leaf_size);

  vt->bsize = bsize;

  vt->force_split = 0;

  vt->src = src;
  vt->src_stride = src_stride;
  vt->ref = ref;
  vt->ref_stride = ref_stride;

  vt->width = width;
  vt->height = height;

#if CONFIG_HIGHBITDEPTH
  vt->highbd = highbd;
#endif  // CONFIG_HIGHBITDEPTH

  if (bsize > leaf_size) {
    const BLOCK_SIZE subsize = get_subsize(bsize, PARTITION_SPLIT);
    const int px = block_size_wide[subsize];

    init_variance_tree(vt->split[0],
#if CONFIG_HIGHBITDEPTH
                       highbd,
#endif  // CONFIG_HIGHBITDEPTH
                       subsize, leaf_size, AOMMIN(px, width),
                       AOMMIN(px, height), src, src_stride, ref, ref_stride);
    init_variance_tree(vt->split[1],
#if CONFIG_HIGHBITDEPTH
                       highbd,
#endif  // CONFIG_HIGHBITDEPTH
                       subsize, leaf_size, width - px, AOMMIN(px, height),
                       src + px, src_stride, ref + px, ref_stride);
    init_variance_tree(vt->split[2],
#if CONFIG_HIGHBITDEPTH
                       highbd,
#endif  // CONFIG_HIGHBITDEPTH
                       subsize, leaf_size, AOMMIN(px, width), height - px,
                       src + px * src_stride, src_stride, ref + px * ref_stride,
                       ref_stride);
    init_variance_tree(vt->split[3],
#if CONFIG_HIGHBITDEPTH
                       highbd,
#endif  // CONFIG_HIGHBITDEPTH
                       subsize, leaf_size, width - px, height - px,
                       src + px * src_stride + px, src_stride,
                       ref + px * ref_stride + px, ref_stride);
  }
}

// Fill the variance tree based on averaging pixel values (sub-sampling), at
// the leaf node size.
static void fill_variance_tree(VAR_TREE *const vt, const BLOCK_SIZE leaf_size) {
  if (vt->bsize > leaf_size) {
    fill_variance_tree(vt->split[0], leaf_size);
    fill_variance_tree(vt->split[1], leaf_size);
    fill_variance_tree(vt->split[2], leaf_size);
    fill_variance_tree(vt->split[3], leaf_size);
    fill_variance_node(vt);
  } else if (vt->width <= 0 || vt->height <= 0) {
    fill_variance(0, 0, 0, &vt->variances.none);
  } else {
    unsigned int sse = 0;
    int sum = 0;
    int src_avg;
    int ref_avg;
    assert(leaf_size == BLOCK_4X4 || leaf_size == BLOCK_8X8);
    if (leaf_size == BLOCK_4X4) {
      src_avg = avg_4x4(vt->src, vt->src_stride IF_HBD(, vt->highbd));
      ref_avg = avg_4x4(vt->ref, vt->ref_stride IF_HBD(, vt->highbd));
    } else {
      src_avg = avg_8x8(vt->src, vt->src_stride IF_HBD(, vt->highbd));
      ref_avg = avg_8x8(vt->ref, vt->ref_stride IF_HBD(, vt->highbd));
    }
    sum = src_avg - ref_avg;
    sse = sum * sum;
    fill_variance(sse, sum, 0, &vt->variances.none);
  }
}

static void refine_variance_tree(VAR_TREE *const vt, const int64_t threshold) {
  if (vt->bsize >= BLOCK_8X8) {
    if (vt->bsize == BLOCK_16X16) {
      if (vt->variances.none.variance <= threshold)
        return;
      else
        vt->force_split = 0;
    }

    refine_variance_tree(vt->split[0], threshold);
    refine_variance_tree(vt->split[1], threshold);
    refine_variance_tree(vt->split[2], threshold);
    refine_variance_tree(vt->split[3], threshold);

    if (vt->bsize <= BLOCK_16X16) fill_variance_node(vt);
  } else if (vt->width <= 0 || vt->height <= 0) {
    fill_variance(0, 0, 0, &vt->variances.none);
  } else {
    const int src_avg = avg_4x4(vt->src, vt->src_stride IF_HBD(, vt->highbd));
    const int ref_avg = avg_4x4(vt->ref, vt->ref_stride IF_HBD(, vt->highbd));
    const int sum = src_avg - ref_avg;
    const unsigned int sse = sum * sum;
    assert(vt->bsize == BLOCK_4X4);
    fill_variance(sse, sum, 0, &vt->variances.none);
  }
}

static int check_split_key_frame(VAR_TREE *const vt, const int64_t threshold) {
  if (vt->bsize == BLOCK_32X32) {
    vt->force_split = vt->variances.none.variance > threshold;
  } else {
    vt->force_split |= check_split_key_frame(vt->split[0], threshold);
    vt->force_split |= check_split_key_frame(vt->split[1], threshold);
    vt->force_split |= check_split_key_frame(vt->split[2], threshold);
    vt->force_split |= check_split_key_frame(vt->split[3], threshold);
  }
  return vt->force_split;
}

static int check_split(AV1_COMP *const cpi, VAR_TREE *const vt,
                       const int segment_id, const int64_t *const thresholds) {
  if (vt->bsize == BLOCK_16X16) {
    vt->force_split = vt->variances.none.variance > thresholds[0];
    if (!vt->force_split && vt->variances.none.variance > thresholds[-1] &&
        !cyclic_refresh_segment_id_boosted(segment_id)) {
      // We have some nominal amount of 16x16 variance (based on average),
      // compute the minmax over the 8x8 sub-blocks, and if above threshold,
      // force split to 8x8 block for this 16x16 block.
      int minmax =
          compute_minmax_8x8(vt->src, vt->src_stride, vt->ref, vt->ref_stride,
#if CONFIG_HIGHBITDEPTH
                             vt->highbd,
#endif
                             vt->width, vt->height);
      vt->force_split = minmax > cpi->vbp_threshold_minmax;
    }
  } else {
    vt->force_split |=
        check_split(cpi, vt->split[0], segment_id, thresholds + 1);
    vt->force_split |=
        check_split(cpi, vt->split[1], segment_id, thresholds + 1);
    vt->force_split |=
        check_split(cpi, vt->split[2], segment_id, thresholds + 1);
    vt->force_split |=
        check_split(cpi, vt->split[3], segment_id, thresholds + 1);

    if (vt->bsize == BLOCK_32X32 && !vt->force_split) {
      vt->force_split = vt->variances.none.variance > thresholds[0];
    }
  }

  return vt->force_split;
}

// This function chooses partitioning based on the variance between source and
// reconstructed last (or golden), where variance is computed for down-sampled
// inputs.
static void choose_partitioning(AV1_COMP *const cpi, ThreadData *const td,
                                const TileInfo *const tile, MACROBLOCK *const x,
                                const int mi_row, const int mi_col) {
  AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  VAR_TREE *const vt = td->var_root[cm->mib_size_log2 - MIN_MIB_SIZE_LOG2];
#if CONFIG_DUAL_FILTER
  int i;
#endif
  const uint8_t *src;
  const uint8_t *ref;
  int src_stride;
  int ref_stride;
  int pixels_wide = MI_SIZE * mi_size_wide[cm->sb_size];
  int pixels_high = MI_SIZE * mi_size_high[cm->sb_size];
  int64_t thresholds[5] = {
    cpi->vbp_thresholds[0], cpi->vbp_thresholds[1], cpi->vbp_thresholds[2],
    cpi->vbp_thresholds[3], cpi->vbp_thresholds[4],
  };
  BLOCK_SIZE bsize_min[5] = { BLOCK_16X16, BLOCK_16X16, BLOCK_16X16,
                              cpi->vbp_bsize_min, BLOCK_8X8 };
  const int start_level = cm->sb_size == BLOCK_64X64 ? 1 : 0;
  const int64_t *const thre = thresholds + start_level;
  const BLOCK_SIZE *const bmin = bsize_min + start_level;

  const int is_key_frame = (cm->frame_type == KEY_FRAME);
  const int low_res = (cm->width <= 352 && cm->height <= 288);

  int segment_id = CR_SEGMENT_ID_BASE;

  if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ && cm->seg.enabled) {
    const uint8_t *const map =
        cm->seg.update_map ? cpi->segmentation_map : cm->last_frame_seg_map;
    segment_id = get_segment_id(cm, map, cm->sb_size, mi_row, mi_col);

    if (cyclic_refresh_segment_id_boosted(segment_id)) {
      int q = av1_get_qindex(&cm->seg, segment_id, cm->base_qindex);
      set_vbp_thresholds(cpi, thresholds, q);
    }
  }

  set_offsets(cpi, tile, x, mi_row, mi_col, cm->sb_size);

  if (xd->mb_to_right_edge < 0) pixels_wide += (xd->mb_to_right_edge >> 3);
  if (xd->mb_to_bottom_edge < 0) pixels_high += (xd->mb_to_bottom_edge >> 3);

  src = x->plane[0].src.buf;
  src_stride = x->plane[0].src.stride;

  if (!is_key_frame) {
    MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
    const YV12_BUFFER_CONFIG *yv12 = get_ref_frame_buffer(cpi, LAST_FRAME);
    const YV12_BUFFER_CONFIG *yv12_g = get_ref_frame_buffer(cpi, GOLDEN_FRAME);
    unsigned int y_sad, y_sad_g;

    const int hbs = cm->mib_size / 2;
    const int split_vert = mi_col + hbs >= cm->mi_cols;
    const int split_horz = mi_row + hbs >= cm->mi_rows;
    BLOCK_SIZE bsize;

    if (split_vert && split_horz)
      bsize = get_subsize(cm->sb_size, PARTITION_SPLIT);
    else if (split_vert)
      bsize = get_subsize(cm->sb_size, PARTITION_VERT);
    else if (split_horz)
      bsize = get_subsize(cm->sb_size, PARTITION_HORZ);
    else
      bsize = cm->sb_size;

    assert(yv12 != NULL);

    if (yv12_g && yv12_g != yv12) {
      av1_setup_pre_planes(xd, 0, yv12_g, mi_row, mi_col,
                           &cm->frame_refs[GOLDEN_FRAME - 1].sf);
      y_sad_g = cpi->fn_ptr[bsize].sdf(
          x->plane[0].src.buf, x->plane[0].src.stride, xd->plane[0].pre[0].buf,
          xd->plane[0].pre[0].stride);
    } else {
      y_sad_g = UINT_MAX;
    }

    av1_setup_pre_planes(xd, 0, yv12, mi_row, mi_col,
                         &cm->frame_refs[LAST_FRAME - 1].sf);
    mbmi->ref_frame[0] = LAST_FRAME;
    mbmi->ref_frame[1] = NONE_FRAME;
    mbmi->sb_type = cm->sb_size;
    mbmi->mv[0].as_int = 0;
#if CONFIG_DUAL_FILTER
    for (i = 0; i < 4; ++i) mbmi->interp_filter[i] = BILINEAR;
#else
    mbmi->interp_filter = BILINEAR;
#endif

    y_sad = av1_int_pro_motion_estimation(cpi, x, bsize, mi_row, mi_col);

    if (y_sad_g < y_sad) {
      av1_setup_pre_planes(xd, 0, yv12_g, mi_row, mi_col,
                           &cm->frame_refs[GOLDEN_FRAME - 1].sf);
      mbmi->ref_frame[0] = GOLDEN_FRAME;
      mbmi->mv[0].as_int = 0;
      y_sad = y_sad_g;
    } else {
      x->pred_mv[LAST_FRAME] = mbmi->mv[0].as_mv;
    }

    av1_build_inter_predictors_sb(xd, mi_row, mi_col, NULL, cm->sb_size);

    ref = xd->plane[0].dst.buf;
    ref_stride = xd->plane[0].dst.stride;

    // If the y_sad is very small, take the largest partition and exit.
    // Don't check on boosted segment for now, as largest is suppressed there.
    if (segment_id == CR_SEGMENT_ID_BASE && y_sad < cpi->vbp_threshold_sad) {
      if (!split_vert && !split_horz) {
        set_block_size(cpi, x, xd, mi_row, mi_col, cm->sb_size);
        return;
      }
    }
  } else {
    ref = AV1_VAR_OFFS;
    ref_stride = 0;
#if CONFIG_HIGHBITDEPTH
    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
      switch (xd->bd) {
        case 10: ref = CONVERT_TO_BYTEPTR(AV1_HIGH_VAR_OFFS_10); break;
        case 12: ref = CONVERT_TO_BYTEPTR(AV1_HIGH_VAR_OFFS_12); break;
        case 8:
        default: ref = CONVERT_TO_BYTEPTR(AV1_HIGH_VAR_OFFS_8); break;
      }
    }
#endif  // CONFIG_HIGHBITDEPTH
  }

  init_variance_tree(
      vt,
#if CONFIG_HIGHBITDEPTH
      xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH,
#endif  // CONFIG_HIGHBITDEPTH
      cm->sb_size, (is_key_frame || low_res) ? BLOCK_4X4 : BLOCK_8X8,
      pixels_wide, pixels_high, src, src_stride, ref, ref_stride);

  // Fill in the entire tree of variances and compute splits.
  if (is_key_frame) {
    fill_variance_tree(vt, BLOCK_4X4);
    check_split_key_frame(vt, thre[1]);
  } else {
    fill_variance_tree(vt, BLOCK_8X8);
    check_split(cpi, vt, segment_id, thre);
    if (low_res) {
      refine_variance_tree(vt, thre[1] << 1);
    }
  }

  vt->force_split |= mi_col + cm->mib_size > cm->mi_cols ||
                     mi_row + cm->mib_size > cm->mi_rows;

  // Now go through the entire structure, splitting every block size until
  // we get to one that's got a variance lower than our threshold.
  set_vt_partitioning(cpi, x, xd, vt, mi_row, mi_col, thre, bmin);
}

#if CONFIG_DUAL_FILTER
static void reset_intmv_filter_type(const AV1_COMMON *const cm, MACROBLOCKD *xd,
                                    MB_MODE_INFO *mbmi) {
  int dir;
  for (dir = 0; dir < 2; ++dir) {
    if (!has_subpel_mv_component(xd->mi[0], xd, dir) &&
        (mbmi->ref_frame[1] == NONE_FRAME ||
         !has_subpel_mv_component(xd->mi[0], xd, dir + 2)))
      mbmi->interp_filter[dir] = (cm->interp_filter == SWITCHABLE)
                                     ? EIGHTTAP_REGULAR
                                     : cm->interp_filter;
    mbmi->interp_filter[dir + 2] = mbmi->interp_filter[dir];
  }
}

static void update_filter_type_count(FRAME_COUNTS *counts,
                                     const MACROBLOCKD *xd,
                                     const MB_MODE_INFO *mbmi) {
  int dir;
  for (dir = 0; dir < 2; ++dir) {
    if (has_subpel_mv_component(xd->mi[0], xd, dir) ||
        (mbmi->ref_frame[1] > INTRA_FRAME &&
         has_subpel_mv_component(xd->mi[0], xd, dir + 2))) {
      const int ctx = av1_get_pred_context_switchable_interp(xd, dir);
      ++counts->switchable_interp[ctx][mbmi->interp_filter[dir]];
    }
  }
}
#endif
#if CONFIG_GLOBAL_MOTION
static void update_global_motion_used(PREDICTION_MODE mode, BLOCK_SIZE bsize,
                                      const MB_MODE_INFO *mbmi,
                                      RD_COUNTS *rdc) {
  if (mode == ZEROMV
#if CONFIG_EXT_INTER
      || mode == ZERO_ZEROMV
#endif
      ) {
    const int num_4x4s =
        num_4x4_blocks_wide_lookup[bsize] * num_4x4_blocks_high_lookup[bsize];
    int ref;
    for (ref = 0; ref < 1 + has_second_ref(mbmi); ++ref) {
      rdc->global_motion_used[mbmi->ref_frame[ref]] += num_4x4s;
    }
  }
}
#endif  // CONFIG_GLOBAL_MOTION

static void reset_tx_size(MACROBLOCKD *xd, MB_MODE_INFO *mbmi,
                          const TX_MODE tx_mode) {
  if (xd->lossless[mbmi->segment_id]) {
    mbmi->tx_size = TX_4X4;
  } else if (tx_mode != TX_MODE_SELECT) {
    mbmi->tx_size =
        tx_size_from_tx_mode(mbmi->sb_type, tx_mode, is_inter_block(mbmi));
  }
}

static void set_ref_and_pred_mvs(MACROBLOCK *const x, int_mv *const mi_pred_mv,
                                 int8_t rf_type) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;

  const int bw = xd->n8_w << MI_SIZE_LOG2;
  const int bh = xd->n8_h << MI_SIZE_LOG2;
  int ref_mv_idx = mbmi->ref_mv_idx;
  MB_MODE_INFO_EXT *const mbmi_ext = x->mbmi_ext;
  CANDIDATE_MV *const curr_ref_mv_stack = mbmi_ext->ref_mv_stack[rf_type];

#if CONFIG_EXT_INTER
  if (has_second_ref(mbmi)) {
    // Special case: NEAR_NEWMV and NEW_NEARMV modes use 1 + mbmi->ref_mv_idx
    // (like NEARMV) instead
    if (mbmi->mode == NEAR_NEWMV || mbmi->mode == NEW_NEARMV) ref_mv_idx += 1;

    if (compound_ref0_mode(mbmi->mode) == NEWMV) {
      int_mv this_mv = curr_ref_mv_stack[ref_mv_idx].this_mv;
      clamp_mv_ref(&this_mv.as_mv, bw, bh, xd);
      mbmi_ext->ref_mvs[mbmi->ref_frame[0]][0] = this_mv;
      mbmi->pred_mv[0] = this_mv;
      mi_pred_mv[0] = this_mv;
    }
    if (compound_ref1_mode(mbmi->mode) == NEWMV) {
      int_mv this_mv = curr_ref_mv_stack[ref_mv_idx].comp_mv;
      clamp_mv_ref(&this_mv.as_mv, bw, bh, xd);
      mbmi_ext->ref_mvs[mbmi->ref_frame[1]][0] = this_mv;
      mbmi->pred_mv[1] = this_mv;
      mi_pred_mv[1] = this_mv;
    }
  } else {
#endif  // CONFIG_EXT_INTER
    if (mbmi->mode == NEWMV) {
      int i;
      for (i = 0; i < 1 + has_second_ref(mbmi); ++i) {
        int_mv this_mv = (i == 0) ? curr_ref_mv_stack[ref_mv_idx].this_mv
                                  : curr_ref_mv_stack[ref_mv_idx].comp_mv;
        clamp_mv_ref(&this_mv.as_mv, bw, bh, xd);
        mbmi_ext->ref_mvs[mbmi->ref_frame[i]][0] = this_mv;
        mbmi->pred_mv[i] = this_mv;
        mi_pred_mv[i] = this_mv;
      }
    }
#if CONFIG_EXT_INTER
  }
#endif  // CONFIG_EXT_INTER
}

static void update_state(const AV1_COMP *const cpi, ThreadData *td,
                         PICK_MODE_CONTEXT *ctx, int mi_row, int mi_col,
                         BLOCK_SIZE bsize, RUN_TYPE dry_run) {
  int i, x_idx, y;
  const AV1_COMMON *const cm = &cpi->common;
  RD_COUNTS *const rdc = &td->rd_counts;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  struct macroblock_plane *const p = x->plane;
  struct macroblockd_plane *const pd = xd->plane;
  MODE_INFO *mi = &ctx->mic;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  MODE_INFO *mi_addr = xd->mi[0];
  const struct segmentation *const seg = &cm->seg;
  const int bw = mi_size_wide[mi->mbmi.sb_type];
  const int bh = mi_size_high[mi->mbmi.sb_type];
  const int x_mis = AOMMIN(bw, cm->mi_cols - mi_col);
  const int y_mis = AOMMIN(bh, cm->mi_rows - mi_row);
  MV_REF *const frame_mvs = cm->cur_frame->mvs + mi_row * cm->mi_cols + mi_col;
  int w, h;

  const int mis = cm->mi_stride;
  const int mi_width = mi_size_wide[bsize];
  const int mi_height = mi_size_high[bsize];
  const int unify_bsize = CONFIG_CB4X4;

  int8_t rf_type;

#if !CONFIG_SUPERTX
  assert(mi->mbmi.sb_type == bsize);
#endif

  *mi_addr = *mi;
  *x->mbmi_ext = ctx->mbmi_ext;

#if CONFIG_DUAL_FILTER
  reset_intmv_filter_type(cm, xd, mbmi);
#endif

  rf_type = av1_ref_frame_type(mbmi->ref_frame);
  if (x->mbmi_ext->ref_mv_count[rf_type] > 1 &&
      (mbmi->sb_type >= BLOCK_8X8 || unify_bsize)) {
    set_ref_and_pred_mvs(x, mi->mbmi.pred_mv, rf_type);
  }

  // If segmentation in use
  if (seg->enabled) {
    // For in frame complexity AQ copy the segment id from the segment map.
    if (cpi->oxcf.aq_mode == COMPLEXITY_AQ) {
      const uint8_t *const map =
          seg->update_map ? cpi->segmentation_map : cm->last_frame_seg_map;
      mi_addr->mbmi.segment_id = get_segment_id(cm, map, bsize, mi_row, mi_col);
      reset_tx_size(xd, &mi_addr->mbmi, cm->tx_mode);
    }
    // Else for cyclic refresh mode update the segment map, set the segment id
    // and then update the quantizer.
    if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ) {
      av1_cyclic_refresh_update_segment(cpi, &xd->mi[0]->mbmi, mi_row, mi_col,
                                        bsize, ctx->rate, ctx->dist, x->skip);
      reset_tx_size(xd, &mi_addr->mbmi, cm->tx_mode);
    }
  }

  for (i = 0; i < MAX_MB_PLANE; ++i) {
    p[i].coeff = ctx->coeff[i];
    p[i].qcoeff = ctx->qcoeff[i];
    pd[i].dqcoeff = ctx->dqcoeff[i];
#if CONFIG_PVQ
    pd[i].pvq_ref_coeff = ctx->pvq_ref_coeff[i];
#endif
    p[i].eobs = ctx->eobs[i];
#if CONFIG_LV_MAP
    p[i].txb_entropy_ctx = ctx->txb_entropy_ctx[i];
#endif  // CONFIG_LV_MAP
  }
#if CONFIG_PALETTE
  for (i = 0; i < 2; ++i) pd[i].color_index_map = ctx->color_index_map[i];
#endif  // CONFIG_PALETTE

  // Restore the coding context of the MB to that that was in place
  // when the mode was picked for it
  for (y = 0; y < mi_height; y++)
    for (x_idx = 0; x_idx < mi_width; x_idx++)
      if ((xd->mb_to_right_edge >> (3 + MI_SIZE_LOG2)) + mi_width > x_idx &&
          (xd->mb_to_bottom_edge >> (3 + MI_SIZE_LOG2)) + mi_height > y) {
        xd->mi[x_idx + y * mis] = mi_addr;
      }

#if CONFIG_DELTA_Q && !CONFIG_EXT_DELTA_Q
  if (cpi->oxcf.aq_mode > NO_AQ && cpi->oxcf.aq_mode < DELTA_AQ)
    av1_init_plane_quantizers(cpi, x, xd->mi[0]->mbmi.segment_id);
#else
  if (cpi->oxcf.aq_mode)
    av1_init_plane_quantizers(cpi, x, xd->mi[0]->mbmi.segment_id);
#endif

  if (is_inter_block(mbmi) && mbmi->sb_type < BLOCK_8X8 && !unify_bsize) {
    mbmi->mv[0].as_int = mi->bmi[3].as_mv[0].as_int;
    mbmi->mv[1].as_int = mi->bmi[3].as_mv[1].as_int;
  }

  x->skip = ctx->skip;

#if CONFIG_VAR_TX
  for (i = 0; i < 1; ++i)
    memcpy(x->blk_skip[i], ctx->blk_skip[i],
           sizeof(uint8_t) * ctx->num_4x4_blk);
#endif

  if (dry_run) return;

#if CONFIG_INTERNAL_STATS
  {
    unsigned int *const mode_chosen_counts =
        (unsigned int *)cpi->mode_chosen_counts;  // Cast const away.
    if (frame_is_intra_only(cm)) {
      static const int kf_mode_index[] = {
        THR_DC /*DC_PRED*/,
        THR_V_PRED /*V_PRED*/,
        THR_H_PRED /*H_PRED*/,
        THR_D45_PRED /*D45_PRED*/,
        THR_D135_PRED /*D135_PRED*/,
        THR_D117_PRED /*D117_PRED*/,
        THR_D153_PRED /*D153_PRED*/,
        THR_D207_PRED /*D207_PRED*/,
        THR_D63_PRED /*D63_PRED*/,
#if CONFIG_ALT_INTRA
        THR_SMOOTH, /*SMOOTH_PRED*/
#if CONFIG_SMOOTH_HV
        THR_SMOOTH_V, /*SMOOTH_V_PRED*/
        THR_SMOOTH_H, /*SMOOTH_H_PRED*/
#endif                // CONFIG_SMOOTH_HV
#endif                // CONFIG_ALT_INTRA
        THR_TM /*TM_PRED*/,
      };
      ++mode_chosen_counts[kf_mode_index[mbmi->mode]];
    } else {
      // Note how often each mode chosen as best
      ++mode_chosen_counts[ctx->best_mode_index];
    }
  }
#endif
  if (!frame_is_intra_only(cm)) {
    if (is_inter_block(mbmi)) {
      av1_update_mv_count(td);
#if CONFIG_GLOBAL_MOTION
      if (bsize >= BLOCK_8X8) {
        // TODO(sarahparker): global motion stats need to be handled per-tile
        // to be compatible with tile-based threading.
        update_global_motion_used(mbmi->mode, bsize, mbmi, rdc);
      } else {
        const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];
        const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];
        int idx, idy;
        for (idy = 0; idy < 2; idy += num_4x4_h) {
          for (idx = 0; idx < 2; idx += num_4x4_w) {
            const int j = idy * 2 + idx;
            update_global_motion_used(mi->bmi[j].as_mode, bsize, mbmi, rdc);
          }
        }
      }
#endif  // CONFIG_GLOBAL_MOTION
      if (cm->interp_filter == SWITCHABLE
#if CONFIG_WARPED_MOTION
          && mbmi->motion_mode != WARPED_CAUSAL
#endif  // CONFIG_WARPED_MOTION
#if CONFIG_GLOBAL_MOTION
          && !is_nontrans_global_motion(xd)
#endif  // CONFIG_GLOBAL_MOTION
              ) {
#if CONFIG_DUAL_FILTER
        update_filter_type_count(td->counts, xd, mbmi);
#else
        const int switchable_ctx = av1_get_pred_context_switchable_interp(xd);
        ++td->counts->switchable_interp[switchable_ctx][mbmi->interp_filter];
#endif
      }
    }

    rdc->comp_pred_diff[SINGLE_REFERENCE] += ctx->single_pred_diff;
    rdc->comp_pred_diff[COMPOUND_REFERENCE] += ctx->comp_pred_diff;
    rdc->comp_pred_diff[REFERENCE_MODE_SELECT] += ctx->hybrid_pred_diff;
  }

  for (h = 0; h < y_mis; ++h) {
    MV_REF *const frame_mv = frame_mvs + h * cm->mi_cols;
    for (w = 0; w < x_mis; ++w) {
      MV_REF *const mv = frame_mv + w;
      mv->ref_frame[0] = mi->mbmi.ref_frame[0];
      mv->ref_frame[1] = mi->mbmi.ref_frame[1];
      mv->mv[0].as_int = mi->mbmi.mv[0].as_int;
      mv->mv[1].as_int = mi->mbmi.mv[1].as_int;
    }
  }
}

#if CONFIG_SUPERTX
static void update_state_supertx(const AV1_COMP *const cpi, ThreadData *td,
                                 PICK_MODE_CONTEXT *ctx, int mi_row, int mi_col,
                                 BLOCK_SIZE bsize, RUN_TYPE dry_run) {
  int y, x_idx;
#if CONFIG_VAR_TX
  int i;
#endif
  const AV1_COMMON *const cm = &cpi->common;
  RD_COUNTS *const rdc = &td->rd_counts;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  MODE_INFO *mi = &ctx->mic;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  MODE_INFO *mi_addr = xd->mi[0];
  const struct segmentation *const seg = &cm->seg;
  const int mis = cm->mi_stride;
  const int mi_width = mi_size_wide[bsize];
  const int mi_height = mi_size_high[bsize];
  const int x_mis = AOMMIN(mi_width, cm->mi_cols - mi_col);
  const int y_mis = AOMMIN(mi_height, cm->mi_rows - mi_row);
  const int unify_bsize = CONFIG_CB4X4;
  MV_REF *const frame_mvs = cm->cur_frame->mvs + mi_row * cm->mi_cols + mi_col;
  int w, h;

  int8_t rf_type;

  *mi_addr = *mi;
  *x->mbmi_ext = ctx->mbmi_ext;
  assert(is_inter_block(mbmi));
  assert(mbmi->tx_size == ctx->mic.mbmi.tx_size);

#if CONFIG_DUAL_FILTER
  reset_intmv_filter_type(cm, xd, mbmi);
#endif

  rf_type = av1_ref_frame_type(mbmi->ref_frame);
  if (x->mbmi_ext->ref_mv_count[rf_type] > 1 &&
      (mbmi->sb_type >= BLOCK_8X8 || unify_bsize)) {
    set_ref_and_pred_mvs(x, mi->mbmi.pred_mv, rf_type);
  }

  // If segmentation in use
  if (seg->enabled) {
    if (cpi->vaq_refresh) {
      const int energy =
          bsize <= BLOCK_16X16 ? x->mb_energy : av1_block_energy(cpi, x, bsize);
      mi_addr->mbmi.segment_id = av1_vaq_segment_id(energy);
    } else if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ) {
      // For cyclic refresh mode, now update the segment map
      // and set the segment id.
      av1_cyclic_refresh_update_segment(cpi, &xd->mi[0]->mbmi, mi_row, mi_col,
                                        bsize, ctx->rate, ctx->dist, 1);
    } else {
      // Otherwise just set the segment id based on the current segment map
      const uint8_t *const map =
          seg->update_map ? cpi->segmentation_map : cm->last_frame_seg_map;
      mi_addr->mbmi.segment_id = get_segment_id(cm, map, bsize, mi_row, mi_col);
    }
    mi_addr->mbmi.segment_id_supertx = MAX_SEGMENTS;
  }

  // Restore the coding context of the MB to that that was in place
  // when the mode was picked for it
  for (y = 0; y < mi_height; y++)
    for (x_idx = 0; x_idx < mi_width; x_idx++)
      if ((xd->mb_to_right_edge >> (3 + MI_SIZE_LOG2)) + mi_width > x_idx &&
          (xd->mb_to_bottom_edge >> (3 + MI_SIZE_LOG2)) + mi_height > y) {
        xd->mi[x_idx + y * mis] = mi_addr;
      }

#if !CONFIG_CB4X4
  if (is_inter_block(mbmi) && mbmi->sb_type < BLOCK_8X8) {
    mbmi->mv[0].as_int = mi->bmi[3].as_mv[0].as_int;
    mbmi->mv[1].as_int = mi->bmi[3].as_mv[1].as_int;
  }
#endif

  x->skip = ctx->skip;

#if CONFIG_VAR_TX
  for (i = 0; i < 1; ++i)
    memcpy(x->blk_skip[i], ctx->blk_skip[i],
           sizeof(uint8_t) * ctx->num_4x4_blk);

  if (!is_inter_block(mbmi) || mbmi->skip)
    mbmi->min_tx_size = get_min_tx_size(mbmi->tx_size);
#endif  // CONFIG_VAR_TX

#if CONFIG_VAR_TX
  {
    const TX_SIZE mtx = mbmi->tx_size;
    const int num_4x4_blocks_wide = tx_size_wide_unit[mtx] >> 1;
    const int num_4x4_blocks_high = tx_size_high_unit[mtx] >> 1;
    int idy, idx;
    mbmi->inter_tx_size[0][0] = mtx;
    for (idy = 0; idy < num_4x4_blocks_high; ++idy)
      for (idx = 0; idx < num_4x4_blocks_wide; ++idx)
        mbmi->inter_tx_size[idy][idx] = mtx;
  }
#endif  // CONFIG_VAR_TX
  // Turn motion variation off for supertx
  mbmi->motion_mode = SIMPLE_TRANSLATION;

  if (dry_run) return;

  if (!frame_is_intra_only(cm)) {
    av1_update_mv_count(td);

#if CONFIG_GLOBAL_MOTION
    if (is_inter_block(mbmi)) {
      if (bsize >= BLOCK_8X8) {
        // TODO(sarahparker): global motion stats need to be handled per-tile
        // to be compatible with tile-based threading.
        update_global_motion_used(mbmi->mode, bsize, mbmi, rdc);
      } else {
        const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];
        const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];
        int idx, idy;
        for (idy = 0; idy < 2; idy += num_4x4_h) {
          for (idx = 0; idx < 2; idx += num_4x4_w) {
            const int j = idy * 2 + idx;
            update_global_motion_used(mi->bmi[j].as_mode, bsize, mbmi, rdc);
          }
        }
      }
    }
#endif  // CONFIG_GLOBAL_MOTION

    if (cm->interp_filter == SWITCHABLE
#if CONFIG_GLOBAL_MOTION
        && !is_nontrans_global_motion(xd)
#endif  // CONFIG_GLOBAL_MOTION
            ) {
#if CONFIG_DUAL_FILTER
      update_filter_type_count(td->counts, xd, mbmi);
#else
      const int pred_ctx = av1_get_pred_context_switchable_interp(xd);
      ++td->counts->switchable_interp[pred_ctx][mbmi->interp_filter];
#endif
    }

    rdc->comp_pred_diff[SINGLE_REFERENCE] += ctx->single_pred_diff;
    rdc->comp_pred_diff[COMPOUND_REFERENCE] += ctx->comp_pred_diff;
    rdc->comp_pred_diff[REFERENCE_MODE_SELECT] += ctx->hybrid_pred_diff;
  }

  for (h = 0; h < y_mis; ++h) {
    MV_REF *const frame_mv = frame_mvs + h * cm->mi_cols;
    for (w = 0; w < x_mis; ++w) {
      MV_REF *const mv = frame_mv + w;
      mv->ref_frame[0] = mi->mbmi.ref_frame[0];
      mv->ref_frame[1] = mi->mbmi.ref_frame[1];
      mv->mv[0].as_int = mi->mbmi.mv[0].as_int;
      mv->mv[1].as_int = mi->mbmi.mv[1].as_int;
    }
  }
}

static void update_state_sb_supertx(const AV1_COMP *const cpi, ThreadData *td,
                                    const TileInfo *const tile, int mi_row,
                                    int mi_col, BLOCK_SIZE bsize,
                                    RUN_TYPE dry_run, PC_TREE *pc_tree) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  struct macroblock_plane *const p = x->plane;
  struct macroblockd_plane *const pd = xd->plane;
  int hbs = mi_size_wide[bsize] / 2;
#if CONFIG_CB4X4
  const int unify_bsize = 1;
#else
  const int unify_bsize = 0;
#endif
  PARTITION_TYPE partition = pc_tree->partitioning;
  BLOCK_SIZE subsize = get_subsize(bsize, partition);
  int i;
#if CONFIG_EXT_PARTITION_TYPES
  BLOCK_SIZE bsize2 = get_subsize(bsize, PARTITION_SPLIT);
#endif
  PICK_MODE_CONTEXT *pmc = NULL;

  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) return;

  if (bsize == BLOCK_16X16 && cpi->vaq_refresh)
    x->mb_energy = av1_block_energy(cpi, x, bsize);

  switch (partition) {
    case PARTITION_NONE:
      set_offsets_supertx(cpi, td, tile, mi_row, mi_col, subsize);
      update_state_supertx(cpi, td, &pc_tree->none, mi_row, mi_col, subsize,
                           dry_run);
      break;
    case PARTITION_VERT:
      set_offsets_supertx(cpi, td, tile, mi_row, mi_col, subsize);
      update_state_supertx(cpi, td, &pc_tree->vertical[0], mi_row, mi_col,
                           subsize, dry_run);
      if (mi_col + hbs < cm->mi_cols && (bsize > BLOCK_8X8 || unify_bsize)) {
        set_offsets_supertx(cpi, td, tile, mi_row, mi_col + hbs, subsize);
        update_state_supertx(cpi, td, &pc_tree->vertical[1], mi_row,
                             mi_col + hbs, subsize, dry_run);
      }
      pmc = &pc_tree->vertical_supertx;
      break;
    case PARTITION_HORZ:
      set_offsets_supertx(cpi, td, tile, mi_row, mi_col, subsize);
      update_state_supertx(cpi, td, &pc_tree->horizontal[0], mi_row, mi_col,
                           subsize, dry_run);
      if (mi_row + hbs < cm->mi_rows && (bsize > BLOCK_8X8 || unify_bsize)) {
        set_offsets_supertx(cpi, td, tile, mi_row + hbs, mi_col, subsize);
        update_state_supertx(cpi, td, &pc_tree->horizontal[1], mi_row + hbs,
                             mi_col, subsize, dry_run);
      }
      pmc = &pc_tree->horizontal_supertx;
      break;
    case PARTITION_SPLIT:
      if (bsize == BLOCK_8X8 && !unify_bsize) {
        set_offsets_supertx(cpi, td, tile, mi_row, mi_col, subsize);
        update_state_supertx(cpi, td, pc_tree->leaf_split[0], mi_row, mi_col,
                             subsize, dry_run);
      } else {
        set_offsets_supertx(cpi, td, tile, mi_row, mi_col, subsize);
        update_state_sb_supertx(cpi, td, tile, mi_row, mi_col, subsize, dry_run,
                                pc_tree->split[0]);
        set_offsets_supertx(cpi, td, tile, mi_row, mi_col + hbs, subsize);
        update_state_sb_supertx(cpi, td, tile, mi_row, mi_col + hbs, subsize,
                                dry_run, pc_tree->split[1]);
        set_offsets_supertx(cpi, td, tile, mi_row + hbs, mi_col, subsize);
        update_state_sb_supertx(cpi, td, tile, mi_row + hbs, mi_col, subsize,
                                dry_run, pc_tree->split[2]);
        set_offsets_supertx(cpi, td, tile, mi_row + hbs, mi_col + hbs, subsize);
        update_state_sb_supertx(cpi, td, tile, mi_row + hbs, mi_col + hbs,
                                subsize, dry_run, pc_tree->split[3]);
      }
      pmc = &pc_tree->split_supertx;
      break;
#if CONFIG_EXT_PARTITION_TYPES
    case PARTITION_HORZ_A:
      set_offsets_supertx(cpi, td, tile, mi_row, mi_col, bsize2);
      update_state_supertx(cpi, td, &pc_tree->horizontala[0], mi_row, mi_col,
                           bsize2, dry_run);
      set_offsets_supertx(cpi, td, tile, mi_row, mi_col + hbs, bsize2);
      update_state_supertx(cpi, td, &pc_tree->horizontala[1], mi_row,
                           mi_col + hbs, bsize2, dry_run);
      set_offsets_supertx(cpi, td, tile, mi_row + hbs, mi_col, subsize);
      update_state_supertx(cpi, td, &pc_tree->horizontala[2], mi_row + hbs,
                           mi_col, subsize, dry_run);
      pmc = &pc_tree->horizontala_supertx;
      break;
    case PARTITION_HORZ_B:
      set_offsets_supertx(cpi, td, tile, mi_row, mi_col, subsize);
      update_state_supertx(cpi, td, &pc_tree->horizontalb[0], mi_row, mi_col,
                           subsize, dry_run);
      set_offsets_supertx(cpi, td, tile, mi_row + hbs, mi_col, bsize2);
      update_state_supertx(cpi, td, &pc_tree->horizontalb[1], mi_row + hbs,
                           mi_col, bsize2, dry_run);
      set_offsets_supertx(cpi, td, tile, mi_row + hbs, mi_col + hbs, bsize2);
      update_state_supertx(cpi, td, &pc_tree->horizontalb[2], mi_row + hbs,
                           mi_col + hbs, bsize2, dry_run);
      pmc = &pc_tree->horizontalb_supertx;
      break;
    case PARTITION_VERT_A:
      set_offsets_supertx(cpi, td, tile, mi_row, mi_col, bsize2);
      update_state_supertx(cpi, td, &pc_tree->verticala[0], mi_row, mi_col,
                           bsize2, dry_run);
      set_offsets_supertx(cpi, td, tile, mi_row + hbs, mi_col, bsize2);
      update_state_supertx(cpi, td, &pc_tree->verticala[1], mi_row + hbs,
                           mi_col, bsize2, dry_run);
      set_offsets_supertx(cpi, td, tile, mi_row, mi_col + hbs, subsize);
      update_state_supertx(cpi, td, &pc_tree->verticala[2], mi_row,
                           mi_col + hbs, subsize, dry_run);
      pmc = &pc_tree->verticala_supertx;
      break;
    case PARTITION_VERT_B:
      set_offsets_supertx(cpi, td, tile, mi_row, mi_col, subsize);
      update_state_supertx(cpi, td, &pc_tree->verticalb[0], mi_row, mi_col,
                           subsize, dry_run);
      set_offsets_supertx(cpi, td, tile, mi_row, mi_col + hbs, bsize2);
      update_state_supertx(cpi, td, &pc_tree->verticalb[1], mi_row,
                           mi_col + hbs, bsize2, dry_run);
      set_offsets_supertx(cpi, td, tile, mi_row + hbs, mi_col + hbs, bsize2);
      update_state_supertx(cpi, td, &pc_tree->verticalb[2], mi_row + hbs,
                           mi_col + hbs, bsize2, dry_run);
      pmc = &pc_tree->verticalb_supertx;
      break;
#endif  // CONFIG_EXT_PARTITION_TYPES
    default: assert(0);
  }

  for (i = 0; i < MAX_MB_PLANE; ++i) {
    if (pmc != NULL) {
      p[i].coeff = pmc->coeff[i];
      p[i].qcoeff = pmc->qcoeff[i];
      pd[i].dqcoeff = pmc->dqcoeff[i];
      p[i].eobs = pmc->eobs[i];
    } else {
      // These should never be used
      p[i].coeff = NULL;
      p[i].qcoeff = NULL;
      pd[i].dqcoeff = NULL;
      p[i].eobs = NULL;
    }
  }
}

static void update_supertx_param(ThreadData *td, PICK_MODE_CONTEXT *ctx,
                                 int best_tx, TX_SIZE supertx_size) {
  MACROBLOCK *const x = &td->mb;
#if CONFIG_VAR_TX
  int i;

  for (i = 0; i < 1; ++i)
    memcpy(ctx->blk_skip[i], x->blk_skip[i],
           sizeof(uint8_t) * ctx->num_4x4_blk);
  ctx->mic.mbmi.min_tx_size = get_min_tx_size(supertx_size);
#endif  // CONFIG_VAR_TX
  ctx->mic.mbmi.tx_size = supertx_size;
  ctx->skip = x->skip;
  ctx->mic.mbmi.tx_type = best_tx;
}

static void update_supertx_param_sb(const AV1_COMP *const cpi, ThreadData *td,
                                    int mi_row, int mi_col, BLOCK_SIZE bsize,
                                    int best_tx, TX_SIZE supertx_size,
                                    PC_TREE *pc_tree) {
  const AV1_COMMON *const cm = &cpi->common;
  const int hbs = mi_size_wide[bsize] / 2;
  PARTITION_TYPE partition = pc_tree->partitioning;
  BLOCK_SIZE subsize = get_subsize(bsize, partition);
#if CONFIG_CB4X4
  const int unify_bsize = 1;
#else
  const int unify_bsize = 0;
#endif
#if CONFIG_EXT_PARTITION_TYPES
  int i;
#endif

  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) return;

  switch (partition) {
    case PARTITION_NONE:
      update_supertx_param(td, &pc_tree->none, best_tx, supertx_size);
      break;
    case PARTITION_VERT:
      update_supertx_param(td, &pc_tree->vertical[0], best_tx, supertx_size);
      if (mi_col + hbs < cm->mi_cols && (bsize > BLOCK_8X8 || unify_bsize))
        update_supertx_param(td, &pc_tree->vertical[1], best_tx, supertx_size);
      break;
    case PARTITION_HORZ:
      update_supertx_param(td, &pc_tree->horizontal[0], best_tx, supertx_size);
      if (mi_row + hbs < cm->mi_rows && (bsize > BLOCK_8X8 || unify_bsize))
        update_supertx_param(td, &pc_tree->horizontal[1], best_tx,
                             supertx_size);
      break;
    case PARTITION_SPLIT:
      if (bsize == BLOCK_8X8 && !unify_bsize) {
        update_supertx_param(td, pc_tree->leaf_split[0], best_tx, supertx_size);
      } else {
        update_supertx_param_sb(cpi, td, mi_row, mi_col, subsize, best_tx,
                                supertx_size, pc_tree->split[0]);
        update_supertx_param_sb(cpi, td, mi_row, mi_col + hbs, subsize, best_tx,
                                supertx_size, pc_tree->split[1]);
        update_supertx_param_sb(cpi, td, mi_row + hbs, mi_col, subsize, best_tx,
                                supertx_size, pc_tree->split[2]);
        update_supertx_param_sb(cpi, td, mi_row + hbs, mi_col + hbs, subsize,
                                best_tx, supertx_size, pc_tree->split[3]);
      }
      break;
#if CONFIG_EXT_PARTITION_TYPES
    case PARTITION_HORZ_A:
      for (i = 0; i < 3; i++)
        update_supertx_param(td, &pc_tree->horizontala[i], best_tx,
                             supertx_size);
      break;
    case PARTITION_HORZ_B:
      for (i = 0; i < 3; i++)
        update_supertx_param(td, &pc_tree->horizontalb[i], best_tx,
                             supertx_size);
      break;
    case PARTITION_VERT_A:
      for (i = 0; i < 3; i++)
        update_supertx_param(td, &pc_tree->verticala[i], best_tx, supertx_size);
      break;
    case PARTITION_VERT_B:
      for (i = 0; i < 3; i++)
        update_supertx_param(td, &pc_tree->verticalb[i], best_tx, supertx_size);
      break;
#endif  // CONFIG_EXT_PARTITION_TYPES
    default: assert(0);
  }
}
#endif  // CONFIG_SUPERTX

#if CONFIG_MOTION_VAR && CONFIG_NCOBMC
static void set_mode_info_b(const AV1_COMP *const cpi,
                            const TileInfo *const tile, ThreadData *td,
                            int mi_row, int mi_col, BLOCK_SIZE bsize,
                            PICK_MODE_CONTEXT *ctx) {
  MACROBLOCK *const x = &td->mb;
  set_offsets(cpi, tile, x, mi_row, mi_col, bsize);
  update_state(cpi, td, ctx, mi_row, mi_col, bsize, 1);
}

static void set_mode_info_sb(const AV1_COMP *const cpi, ThreadData *td,
                             const TileInfo *const tile, TOKENEXTRA **tp,
                             int mi_row, int mi_col, BLOCK_SIZE bsize,
                             PC_TREE *pc_tree) {
  const AV1_COMMON *const cm = &cpi->common;
  const int hbs = mi_size_wide[bsize] / 2;
  const PARTITION_TYPE partition = pc_tree->partitioning;
  BLOCK_SIZE subsize = get_subsize(bsize, partition);
#if CONFIG_EXT_PARTITION_TYPES
  const BLOCK_SIZE bsize2 = get_subsize(bsize, PARTITION_SPLIT);
#endif
#if CONFIG_CB4X4
  const int unify_bsize = 1;
#else
  const int unify_bsize = 0;
  assert(bsize >= BLOCK_8X8);
#endif

  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) return;

  switch (partition) {
    case PARTITION_NONE:
      set_mode_info_b(cpi, tile, td, mi_row, mi_col, subsize, &pc_tree->none);
      break;
    case PARTITION_VERT:
      set_mode_info_b(cpi, tile, td, mi_row, mi_col, subsize,
                      &pc_tree->vertical[0]);
      if (mi_col + hbs < cm->mi_cols && (bsize > BLOCK_8X8 || unify_bsize)) {
        set_mode_info_b(cpi, tile, td, mi_row, mi_col + hbs, subsize,
                        &pc_tree->vertical[1]);
      }
      break;
    case PARTITION_HORZ:
      set_mode_info_b(cpi, tile, td, mi_row, mi_col, subsize,
                      &pc_tree->horizontal[0]);
      if (mi_row + hbs < cm->mi_rows && (bsize > BLOCK_8X8 || unify_bsize)) {
        set_mode_info_b(cpi, tile, td, mi_row + hbs, mi_col, subsize,
                        &pc_tree->horizontal[1]);
      }
      break;
    case PARTITION_SPLIT:
      if (bsize == BLOCK_8X8 && !unify_bsize) {
        set_mode_info_b(cpi, tile, td, mi_row, mi_col, subsize,
                        pc_tree->leaf_split[0]);
      } else {
        set_mode_info_sb(cpi, td, tile, tp, mi_row, mi_col, subsize,
                         pc_tree->split[0]);
        set_mode_info_sb(cpi, td, tile, tp, mi_row, mi_col + hbs, subsize,
                         pc_tree->split[1]);
        set_mode_info_sb(cpi, td, tile, tp, mi_row + hbs, mi_col, subsize,
                         pc_tree->split[2]);
        set_mode_info_sb(cpi, td, tile, tp, mi_row + hbs, mi_col + hbs, subsize,
                         pc_tree->split[3]);
      }
      break;
#if CONFIG_EXT_PARTITION_TYPES
    case PARTITION_HORZ_A:
      set_mode_info_b(cpi, tile, td, mi_row, mi_col, bsize2,
                      &pc_tree->horizontala[0]);
      set_mode_info_b(cpi, tile, td, mi_row, mi_col + hbs, bsize2,
                      &pc_tree->horizontala[1]);
      set_mode_info_b(cpi, tile, td, mi_row + hbs, mi_col, subsize,
                      &pc_tree->horizontala[2]);
      break;
    case PARTITION_HORZ_B:
      set_mode_info_b(cpi, tile, td, mi_row, mi_col, subsize,
                      &pc_tree->horizontalb[0]);
      set_mode_info_b(cpi, tile, td, mi_row + hbs, mi_col, bsize2,
                      &pc_tree->horizontalb[1]);
      set_mode_info_b(cpi, tile, td, mi_row + hbs, mi_col + hbs, bsize2,
                      &pc_tree->horizontalb[2]);
      break;
    case PARTITION_VERT_A:
      set_mode_info_b(cpi, tile, td, mi_row, mi_col, bsize2,
                      &pc_tree->verticala[0]);
      set_mode_info_b(cpi, tile, td, mi_row + hbs, mi_col, bsize2,
                      &pc_tree->verticala[1]);
      set_mode_info_b(cpi, tile, td, mi_row, mi_col + hbs, subsize,
                      &pc_tree->verticala[2]);
      break;
    case PARTITION_VERT_B:
      set_mode_info_b(cpi, tile, td, mi_row, mi_col, subsize,
                      &pc_tree->verticalb[0]);
      set_mode_info_b(cpi, tile, td, mi_row, mi_col + hbs, bsize2,
                      &pc_tree->verticalb[1]);
      set_mode_info_b(cpi, tile, td, mi_row + hbs, mi_col + hbs, bsize2,
                      &pc_tree->verticalb[2]);
      break;
#endif  // CONFIG_EXT_PARTITION_TYPES
    default: assert(0 && "Invalid partition type."); break;
  }
}
#endif

void av1_setup_src_planes(MACROBLOCK *x, const YV12_BUFFER_CONFIG *src,
                          int mi_row, int mi_col) {
  uint8_t *const buffers[3] = { src->y_buffer, src->u_buffer, src->v_buffer };
  const int widths[3] = { src->y_crop_width, src->uv_crop_width,
                          src->uv_crop_width };
  const int heights[3] = { src->y_crop_height, src->uv_crop_height,
                           src->uv_crop_height };
  const int strides[3] = { src->y_stride, src->uv_stride, src->uv_stride };
  int i;

  // Set current frame pointer.
  x->e_mbd.cur_buf = src;

  for (i = 0; i < MAX_MB_PLANE; i++)
    setup_pred_plane(&x->plane[i].src, x->e_mbd.mi[0]->mbmi.sb_type, buffers[i],
                     widths[i], heights[i], strides[i], mi_row, mi_col, NULL,
                     x->e_mbd.plane[i].subsampling_x,
                     x->e_mbd.plane[i].subsampling_y);
}

static int set_segment_rdmult(const AV1_COMP *const cpi, MACROBLOCK *const x,
                              int8_t segment_id) {
  int segment_qindex;
  const AV1_COMMON *const cm = &cpi->common;
  av1_init_plane_quantizers(cpi, x, segment_id);
  aom_clear_system_state();
  segment_qindex = av1_get_qindex(&cm->seg, segment_id, cm->base_qindex);
  return av1_compute_rd_mult(cpi, segment_qindex + cm->y_dc_delta_q);
}

static void rd_pick_sb_modes(const AV1_COMP *const cpi, TileDataEnc *tile_data,
                             MACROBLOCK *const x, int mi_row, int mi_col,
                             RD_STATS *rd_cost,
#if CONFIG_SUPERTX
                             int *totalrate_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                             PARTITION_TYPE partition,
#endif
                             BLOCK_SIZE bsize, PICK_MODE_CONTEXT *ctx,
                             int64_t best_rd) {
  const AV1_COMMON *const cm = &cpi->common;
  TileInfo *const tile_info = &tile_data->tile_info;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *mbmi;
  struct macroblock_plane *const p = x->plane;
  struct macroblockd_plane *const pd = xd->plane;
  const AQ_MODE aq_mode = cpi->oxcf.aq_mode;
  int i, orig_rdmult;
  const int unify_bsize = CONFIG_CB4X4;

  aom_clear_system_state();

#if CONFIG_PVQ
  x->pvq_speed = 1;
  x->pvq_coded = 0;
#endif
#if CONFIG_CFL
  // Don't store luma during RDO (we will store the best mode later).
  x->cfl_store_y = 0;
#endif

  set_offsets(cpi, tile_info, x, mi_row, mi_col, bsize);
  mbmi = &xd->mi[0]->mbmi;
  mbmi->sb_type = bsize;
#if CONFIG_RD_DEBUG
  mbmi->mi_row = mi_row;
  mbmi->mi_col = mi_col;
#endif
#if CONFIG_SUPERTX
  // We set tx_size here as skip blocks would otherwise not set it.
  // tx_size needs to be set at this point as supertx_enable in
  // write_modes_sb is computed based on this, and if the garbage in memory
  // just happens to be the supertx_size, then the packer will code this
  // block as a supertx block, even if rdopt did not pick it as such.
  mbmi->tx_size = max_txsize_lookup[bsize];
#endif
#if CONFIG_EXT_PARTITION_TYPES
  mbmi->partition = partition;
#endif

  for (i = 0; i < MAX_MB_PLANE; ++i) {
    p[i].coeff = ctx->coeff[i];
    p[i].qcoeff = ctx->qcoeff[i];
    pd[i].dqcoeff = ctx->dqcoeff[i];
#if CONFIG_PVQ
    pd[i].pvq_ref_coeff = ctx->pvq_ref_coeff[i];
#endif
    p[i].eobs = ctx->eobs[i];
#if CONFIG_LV_MAP
    p[i].txb_entropy_ctx = ctx->txb_entropy_ctx[i];
#endif
  }

#if CONFIG_PALETTE
  for (i = 0; i < 2; ++i) pd[i].color_index_map = ctx->color_index_map[i];
#endif  // CONFIG_PALETTE

  ctx->skippable = 0;

  // Set to zero to make sure we do not use the previous encoded frame stats
  mbmi->skip = 0;

#if CONFIG_CB4X4
  x->skip_chroma_rd =
      !is_chroma_reference(mi_row, mi_col, bsize, xd->plane[1].subsampling_x,
                           xd->plane[1].subsampling_y);
#endif

#if CONFIG_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    x->source_variance = av1_high_get_sby_perpixel_variance(
        cpi, &x->plane[0].src, bsize, xd->bd);
  } else {
    x->source_variance =
        av1_get_sby_perpixel_variance(cpi, &x->plane[0].src, bsize);
  }
#else
  x->source_variance =
      av1_get_sby_perpixel_variance(cpi, &x->plane[0].src, bsize);
#endif  // CONFIG_HIGHBITDEPTH

  // Save rdmult before it might be changed, so it can be restored later.
  orig_rdmult = x->rdmult;

  if (aq_mode == VARIANCE_AQ) {
    if (cpi->vaq_refresh) {
      const int energy =
          bsize <= BLOCK_16X16 ? x->mb_energy : av1_block_energy(cpi, x, bsize);
      mbmi->segment_id = av1_vaq_segment_id(energy);
      // Re-initialise quantiser
      av1_init_plane_quantizers(cpi, x, mbmi->segment_id);
    }
    x->rdmult = set_segment_rdmult(cpi, x, mbmi->segment_id);
  } else if (aq_mode == COMPLEXITY_AQ) {
    x->rdmult = set_segment_rdmult(cpi, x, mbmi->segment_id);
  } else if (aq_mode == CYCLIC_REFRESH_AQ) {
    // If segment is boosted, use rdmult for that segment.
    if (cyclic_refresh_segment_id_boosted(mbmi->segment_id))
      x->rdmult = av1_cyclic_refresh_get_rdmult(cpi->cyclic_refresh);
  }

  // Find best coding mode & reconstruct the MB so it is available
  // as a predictor for MBs that follow in the SB
  if (frame_is_intra_only(cm)) {
    av1_rd_pick_intra_mode_sb(cpi, x, rd_cost, bsize, ctx, best_rd);
#if CONFIG_SUPERTX
    *totalrate_nocoef = 0;
#endif  // CONFIG_SUPERTX
  } else {
    if (bsize >= BLOCK_8X8 || unify_bsize) {
      if (segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
        av1_rd_pick_inter_mode_sb_seg_skip(cpi, tile_data, x, mi_row, mi_col,
                                           rd_cost, bsize, ctx, best_rd);
#if CONFIG_SUPERTX
        *totalrate_nocoef = rd_cost->rate;
#endif  // CONFIG_SUPERTX
      } else {
        av1_rd_pick_inter_mode_sb(cpi, tile_data, x, mi_row, mi_col, rd_cost,
#if CONFIG_SUPERTX
                                  totalrate_nocoef,
#endif  // CONFIG_SUPERTX
                                  bsize, ctx, best_rd);
#if CONFIG_SUPERTX
        assert(*totalrate_nocoef >= 0);
#endif  // CONFIG_SUPERTX
      }
    } else {
      if (segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
        // The decoder rejects sub8x8 partitions when SEG_LVL_SKIP is set.
        rd_cost->rate = INT_MAX;
      } else {
        av1_rd_pick_inter_mode_sub8x8(cpi, tile_data, x, mi_row, mi_col,
                                      rd_cost,
#if CONFIG_SUPERTX
                                      totalrate_nocoef,
#endif  // CONFIG_SUPERTX
                                      bsize, ctx, best_rd);
#if CONFIG_SUPERTX
        assert(*totalrate_nocoef >= 0);
#endif  // CONFIG_SUPERTX
      }
    }
  }

  // Examine the resulting rate and for AQ mode 2 make a segment choice.
  if ((rd_cost->rate != INT_MAX) && (aq_mode == COMPLEXITY_AQ) &&
      (bsize >= BLOCK_16X16) &&
      (cm->frame_type == KEY_FRAME || cpi->refresh_alt_ref_frame ||
       (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref))) {
    av1_caq_select_segment(cpi, x, bsize, mi_row, mi_col, rd_cost->rate);
  }

  x->rdmult = orig_rdmult;

  // TODO(jingning) The rate-distortion optimization flow needs to be
  // refactored to provide proper exit/return handle.
  if (rd_cost->rate == INT_MAX) rd_cost->rdcost = INT64_MAX;

  ctx->rate = rd_cost->rate;
  ctx->dist = rd_cost->dist;
}

static void update_inter_mode_stats(FRAME_COUNTS *counts, PREDICTION_MODE mode,
                                    int16_t mode_context) {
  int16_t mode_ctx = mode_context & NEWMV_CTX_MASK;
  if (mode == NEWMV) {
    ++counts->newmv_mode[mode_ctx][0];
    return;
  } else {
    ++counts->newmv_mode[mode_ctx][1];

    if (mode_context & (1 << ALL_ZERO_FLAG_OFFSET)) {
      return;
    }

    mode_ctx = (mode_context >> ZEROMV_OFFSET) & ZEROMV_CTX_MASK;
    if (mode == ZEROMV) {
      ++counts->zeromv_mode[mode_ctx][0];
      return;
    } else {
      ++counts->zeromv_mode[mode_ctx][1];
      mode_ctx = (mode_context >> REFMV_OFFSET) & REFMV_CTX_MASK;

      if (mode_context & (1 << SKIP_NEARESTMV_OFFSET)) mode_ctx = 6;
      if (mode_context & (1 << SKIP_NEARMV_OFFSET)) mode_ctx = 7;
      if (mode_context & (1 << SKIP_NEARESTMV_SUB8X8_OFFSET)) mode_ctx = 8;

      ++counts->refmv_mode[mode_ctx][mode != NEARESTMV];
    }
  }
}

static void update_stats(const AV1_COMMON *const cm, ThreadData *td, int mi_row,
                         int mi_col
#if CONFIG_SUPERTX
                         ,
                         int supertx_enabled
#endif
                         ) {
#if CONFIG_DELTA_Q
  MACROBLOCK *x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
#else
  const MACROBLOCK *x = &td->mb;
  const MACROBLOCKD *const xd = &x->e_mbd;
#endif
  const MODE_INFO *const mi = xd->mi[0];
  const MB_MODE_INFO *const mbmi = &mi->mbmi;
  const MB_MODE_INFO_EXT *const mbmi_ext = x->mbmi_ext;
  const BLOCK_SIZE bsize = mbmi->sb_type;
  const int unify_bsize = CONFIG_CB4X4;

#if CONFIG_DELTA_Q
  // delta quant applies to both intra and inter
  const int super_block_upper_left = ((mi_row & 7) == 0) && ((mi_col & 7) == 0);

  if (cm->delta_q_present_flag && (bsize != BLOCK_64X64 || !mbmi->skip) &&
      super_block_upper_left) {
    const int dq = (mbmi->current_q_index - xd->prev_qindex) / cm->delta_q_res;
    const int absdq = abs(dq);
    int i;
    for (i = 0; i < AOMMIN(absdq, DELTA_Q_SMALL); ++i) {
      td->counts->delta_q[i][1]++;
    }
    if (absdq < DELTA_Q_SMALL) td->counts->delta_q[absdq][0]++;
    xd->prev_qindex = mbmi->current_q_index;
#if CONFIG_EXT_DELTA_Q
    if (cm->delta_lf_present_flag) {
      const int dlf =
          (mbmi->current_delta_lf_from_base - xd->prev_delta_lf_from_base) /
          cm->delta_lf_res;
      const int absdlf = abs(dlf);
      for (i = 0; i < AOMMIN(absdlf, DELTA_LF_SMALL); ++i) {
        td->counts->delta_lf[i][1]++;
      }
      if (absdlf < DELTA_LF_SMALL) td->counts->delta_lf[absdlf][0]++;
      xd->prev_delta_lf_from_base = mbmi->current_delta_lf_from_base;
    }
#endif
  }
#else
  (void)mi_row;
  (void)mi_col;
#endif
  if (!frame_is_intra_only(cm)) {
    FRAME_COUNTS *const counts = td->counts;
    const int inter_block = is_inter_block(mbmi);
    const int seg_ref_active =
        segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_REF_FRAME);
    if (!seg_ref_active) {
#if CONFIG_SUPERTX
      if (!supertx_enabled)
#endif
        counts->intra_inter[av1_get_intra_inter_context(xd)][inter_block]++;
      // If the segment reference feature is enabled we have only a single
      // reference frame allowed for the segment so exclude it from
      // the reference frame counts used to work out probabilities.
      if (inter_block) {
        const MV_REFERENCE_FRAME ref0 = mbmi->ref_frame[0];
#if CONFIG_EXT_REFS
        const MV_REFERENCE_FRAME ref1 = mbmi->ref_frame[1];
#endif  // CONFIG_EXT_REFS

        if (cm->reference_mode == REFERENCE_MODE_SELECT) {
#if !SUB8X8_COMP_REF
          if (mbmi->sb_type >= BLOCK_8X8)
            counts->comp_inter[av1_get_reference_mode_context(cm, xd)]
                              [has_second_ref(mbmi)]++;
#else
          counts->comp_inter[av1_get_reference_mode_context(cm, xd)]
                            [has_second_ref(mbmi)]++;
#endif
        }

        if (has_second_ref(mbmi)) {
#if CONFIG_EXT_REFS
          const int bit = (ref0 == GOLDEN_FRAME || ref0 == LAST3_FRAME);

          counts->comp_ref[av1_get_pred_context_comp_ref_p(cm, xd)][0][bit]++;
          if (!bit) {
            counts->comp_ref[av1_get_pred_context_comp_ref_p1(cm, xd)][1]
                            [ref0 == LAST_FRAME]++;
          } else {
            counts->comp_ref[av1_get_pred_context_comp_ref_p2(cm, xd)][2]
                            [ref0 == GOLDEN_FRAME]++;
          }

          counts->comp_bwdref[av1_get_pred_context_comp_bwdref_p(cm, xd)][0]
                             [ref1 == ALTREF_FRAME]++;
#else
          counts->comp_ref[av1_get_pred_context_comp_ref_p(cm, xd)][0]
                          [ref0 == GOLDEN_FRAME]++;
#endif  // CONFIG_EXT_REFS
        } else {
#if CONFIG_EXT_REFS
          const int bit = (ref0 == ALTREF_FRAME || ref0 == BWDREF_FRAME);

          counts->single_ref[av1_get_pred_context_single_ref_p1(xd)][0][bit]++;
          if (bit) {
            counts->single_ref[av1_get_pred_context_single_ref_p2(xd)][1]
                              [ref0 != BWDREF_FRAME]++;
          } else {
            const int bit1 = !(ref0 == LAST2_FRAME || ref0 == LAST_FRAME);
            counts
                ->single_ref[av1_get_pred_context_single_ref_p3(xd)][2][bit1]++;
            if (!bit1) {
              counts->single_ref[av1_get_pred_context_single_ref_p4(xd)][3]
                                [ref0 != LAST_FRAME]++;
            } else {
              counts->single_ref[av1_get_pred_context_single_ref_p5(xd)][4]
                                [ref0 != LAST3_FRAME]++;
            }
          }
#else
          counts->single_ref[av1_get_pred_context_single_ref_p1(xd)][0]
                            [ref0 != LAST_FRAME]++;
          if (ref0 != LAST_FRAME) {
            counts->single_ref[av1_get_pred_context_single_ref_p2(xd)][1]
                              [ref0 != GOLDEN_FRAME]++;
          }
#endif  // CONFIG_EXT_REFS
        }

#if CONFIG_EXT_INTER
        if (cm->reference_mode != COMPOUND_REFERENCE &&
#if CONFIG_SUPERTX
            !supertx_enabled &&
#endif
            is_interintra_allowed(mbmi)) {
          const int bsize_group = size_group_lookup[bsize];
          if (mbmi->ref_frame[1] == INTRA_FRAME) {
            counts->interintra[bsize_group][1]++;
            counts->interintra_mode[bsize_group][mbmi->interintra_mode]++;
            if (is_interintra_wedge_used(bsize))
              counts->wedge_interintra[bsize][mbmi->use_wedge_interintra]++;
          } else {
            counts->interintra[bsize_group][0]++;
          }
        }
#endif  // CONFIG_EXT_INTER

#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
        const MOTION_MODE motion_allowed = motion_mode_allowed(
#if CONFIG_GLOBAL_MOTION && SEPARATE_GLOBAL_MOTION
            0, xd->global_motion,
#endif  // CONFIG_GLOBAL_MOTION && SEPARATE_GLOBAL_MOTION
            mi);
#if CONFIG_SUPERTX
        if (!supertx_enabled)
#endif  // CONFIG_SUPERTX
#if CONFIG_EXT_INTER
          if (mbmi->ref_frame[1] != INTRA_FRAME)
#endif  // CONFIG_EXT_INTER
#if CONFIG_MOTION_VAR && CONFIG_WARPED_MOTION
          {
            if (motion_allowed == WARPED_CAUSAL)
              counts->motion_mode[mbmi->sb_type][mbmi->motion_mode]++;
            else if (motion_allowed == OBMC_CAUSAL)
              counts->obmc[mbmi->sb_type][mbmi->motion_mode == OBMC_CAUSAL]++;
          }
#else
        if (motion_allowed > SIMPLE_TRANSLATION)
          counts->motion_mode[mbmi->sb_type][mbmi->motion_mode]++;
#endif  // CONFIG_MOTION_VAR && CONFIG_WARPED_MOTION
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION

#if CONFIG_EXT_INTER
        if (cm->reference_mode != SINGLE_REFERENCE &&
            is_inter_compound_mode(mbmi->mode)
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
            && mbmi->motion_mode == SIMPLE_TRANSLATION
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
            ) {
          counts->compound_interinter[bsize][mbmi->interinter_compound_type]++;
        }
#endif  // CONFIG_EXT_INTER
      }
    }

    if (inter_block &&
        !segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
      int16_t mode_ctx;
      if (bsize >= BLOCK_8X8 || unify_bsize) {
        const PREDICTION_MODE mode = mbmi->mode;
#if CONFIG_EXT_INTER
        if (has_second_ref(mbmi)) {
          mode_ctx = mbmi_ext->compound_mode_context[mbmi->ref_frame[0]];
          ++counts->inter_compound_mode[mode_ctx][INTER_COMPOUND_OFFSET(mode)];
        } else {
#endif  // CONFIG_EXT_INTER
          mode_ctx = av1_mode_context_analyzer(mbmi_ext->mode_context,
                                               mbmi->ref_frame, bsize, -1);
          update_inter_mode_stats(counts, mode, mode_ctx);
#if CONFIG_EXT_INTER
        }
#endif  // CONFIG_EXT_INTER

#if CONFIG_EXT_INTER
        if (mbmi->mode == NEWMV || mbmi->mode == NEW_NEWMV) {
#else
        if (mbmi->mode == NEWMV) {
#endif
          uint8_t ref_frame_type = av1_ref_frame_type(mbmi->ref_frame);
          int idx;

          for (idx = 0; idx < 2; ++idx) {
            if (mbmi_ext->ref_mv_count[ref_frame_type] > idx + 1) {
              uint8_t drl_ctx =
                  av1_drl_ctx(mbmi_ext->ref_mv_stack[ref_frame_type], idx);
              ++counts->drl_mode[drl_ctx][mbmi->ref_mv_idx != idx];

              if (mbmi->ref_mv_idx == idx) break;
            }
          }
        }

#if CONFIG_EXT_INTER
        if (have_nearmv_in_inter_mode(mbmi->mode)) {
#else
        if (mbmi->mode == NEARMV) {
#endif
          uint8_t ref_frame_type = av1_ref_frame_type(mbmi->ref_frame);
          int idx;

          for (idx = 1; idx < 3; ++idx) {
            if (mbmi_ext->ref_mv_count[ref_frame_type] > idx + 1) {
              uint8_t drl_ctx =
                  av1_drl_ctx(mbmi_ext->ref_mv_stack[ref_frame_type], idx);
              ++counts->drl_mode[drl_ctx][mbmi->ref_mv_idx != idx - 1];

              if (mbmi->ref_mv_idx == idx - 1) break;
            }
          }
        }
      } else {
        const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];
        const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];
        int idx, idy;
        for (idy = 0; idy < 2; idy += num_4x4_h) {
          for (idx = 0; idx < 2; idx += num_4x4_w) {
            const int j = idy * 2 + idx;
            const PREDICTION_MODE b_mode = mi->bmi[j].as_mode;
#if CONFIG_EXT_INTER
            if (has_second_ref(mbmi)) {
              mode_ctx = mbmi_ext->compound_mode_context[mbmi->ref_frame[0]];
              ++counts->inter_compound_mode[mode_ctx]
                                           [INTER_COMPOUND_OFFSET(b_mode)];
            } else {
#endif  // CONFIG_EXT_INTER
              mode_ctx = av1_mode_context_analyzer(mbmi_ext->mode_context,
                                                   mbmi->ref_frame, bsize, j);
              update_inter_mode_stats(counts, b_mode, mode_ctx);
#if CONFIG_EXT_INTER
            }
#endif  // CONFIG_EXT_INTER
          }
        }
      }
    }
  }
}

typedef struct {
  ENTROPY_CONTEXT a[2 * MAX_MIB_SIZE * MAX_MB_PLANE];
  ENTROPY_CONTEXT l[2 * MAX_MIB_SIZE * MAX_MB_PLANE];
  PARTITION_CONTEXT sa[MAX_MIB_SIZE];
  PARTITION_CONTEXT sl[MAX_MIB_SIZE];
#if CONFIG_VAR_TX
  TXFM_CONTEXT *p_ta;
  TXFM_CONTEXT *p_tl;
  TXFM_CONTEXT ta[MAX_MIB_SIZE];
  TXFM_CONTEXT tl[MAX_MIB_SIZE];
#endif
} RD_SEARCH_MACROBLOCK_CONTEXT;

static void restore_context(MACROBLOCK *x,
                            const RD_SEARCH_MACROBLOCK_CONTEXT *ctx, int mi_row,
                            int mi_col,
#if CONFIG_PVQ
                            od_rollback_buffer *rdo_buf,
#endif
                            BLOCK_SIZE bsize) {
  MACROBLOCKD *xd = &x->e_mbd;
  int p;
  const int num_4x4_blocks_wide =
      block_size_wide[bsize] >> tx_size_wide_log2[0];
  const int num_4x4_blocks_high =
      block_size_high[bsize] >> tx_size_high_log2[0];
  int mi_width = mi_size_wide[bsize];
  int mi_height = mi_size_high[bsize];
  for (p = 0; p < MAX_MB_PLANE; p++) {
    memcpy(xd->above_context[p] + ((mi_col * 2) >> xd->plane[p].subsampling_x),
           ctx->a + num_4x4_blocks_wide * p,
           (sizeof(ENTROPY_CONTEXT) * num_4x4_blocks_wide) >>
               xd->plane[p].subsampling_x);
    memcpy(xd->left_context[p] +
               ((mi_row & MAX_MIB_MASK) * 2 >> xd->plane[p].subsampling_y),
           ctx->l + num_4x4_blocks_high * p,
           (sizeof(ENTROPY_CONTEXT) * num_4x4_blocks_high) >>
               xd->plane[p].subsampling_y);
  }
  memcpy(xd->above_seg_context + mi_col, ctx->sa,
         sizeof(*xd->above_seg_context) * mi_width);
  memcpy(xd->left_seg_context + (mi_row & MAX_MIB_MASK), ctx->sl,
         sizeof(xd->left_seg_context[0]) * mi_height);
#if CONFIG_VAR_TX
  xd->above_txfm_context = ctx->p_ta;
  xd->left_txfm_context = ctx->p_tl;
  memcpy(xd->above_txfm_context, ctx->ta,
         sizeof(*xd->above_txfm_context) * mi_width);
  memcpy(xd->left_txfm_context, ctx->tl,
         sizeof(*xd->left_txfm_context) * mi_height);
#endif
#if CONFIG_PVQ
  od_encode_rollback(&x->daala_enc, rdo_buf);
#endif
}

static void save_context(const MACROBLOCK *x, RD_SEARCH_MACROBLOCK_CONTEXT *ctx,
                         int mi_row, int mi_col,
#if CONFIG_PVQ
                         od_rollback_buffer *rdo_buf,
#endif
                         BLOCK_SIZE bsize) {
  const MACROBLOCKD *xd = &x->e_mbd;
  int p;
  const int num_4x4_blocks_wide =
      block_size_wide[bsize] >> tx_size_wide_log2[0];
  const int num_4x4_blocks_high =
      block_size_high[bsize] >> tx_size_high_log2[0];
  int mi_width = mi_size_wide[bsize];
  int mi_height = mi_size_high[bsize];

  // buffer the above/left context information of the block in search.
  for (p = 0; p < MAX_MB_PLANE; ++p) {
    memcpy(ctx->a + num_4x4_blocks_wide * p,
           xd->above_context[p] + (mi_col * 2 >> xd->plane[p].subsampling_x),
           (sizeof(ENTROPY_CONTEXT) * num_4x4_blocks_wide) >>
               xd->plane[p].subsampling_x);
    memcpy(ctx->l + num_4x4_blocks_high * p,
           xd->left_context[p] +
               ((mi_row & MAX_MIB_MASK) * 2 >> xd->plane[p].subsampling_y),
           (sizeof(ENTROPY_CONTEXT) * num_4x4_blocks_high) >>
               xd->plane[p].subsampling_y);
  }
  memcpy(ctx->sa, xd->above_seg_context + mi_col,
         sizeof(*xd->above_seg_context) * mi_width);
  memcpy(ctx->sl, xd->left_seg_context + (mi_row & MAX_MIB_MASK),
         sizeof(xd->left_seg_context[0]) * mi_height);
#if CONFIG_VAR_TX
  memcpy(ctx->ta, xd->above_txfm_context,
         sizeof(*xd->above_txfm_context) * mi_width);
  memcpy(ctx->tl, xd->left_txfm_context,
         sizeof(*xd->left_txfm_context) * mi_height);
  ctx->p_ta = xd->above_txfm_context;
  ctx->p_tl = xd->left_txfm_context;
#endif
#if CONFIG_PVQ
  od_encode_checkpoint(&x->daala_enc, rdo_buf);
#endif
}

static void encode_b(const AV1_COMP *const cpi, const TileInfo *const tile,
                     ThreadData *td, TOKENEXTRA **tp, int mi_row, int mi_col,
                     RUN_TYPE dry_run, BLOCK_SIZE bsize,
#if CONFIG_EXT_PARTITION_TYPES
                     PARTITION_TYPE partition,
#endif
                     PICK_MODE_CONTEXT *ctx, int *rate) {
  MACROBLOCK *const x = &td->mb;
#if (CONFIG_MOTION_VAR && CONFIG_NCOBMC) | CONFIG_EXT_DELTA_Q
  MACROBLOCKD *xd = &x->e_mbd;
  MB_MODE_INFO *mbmi;
#if CONFIG_MOTION_VAR && CONFIG_NCOBMC
  int check_ncobmc;
#endif
#endif

  set_offsets(cpi, tile, x, mi_row, mi_col, bsize);
#if CONFIG_EXT_PARTITION_TYPES
  x->e_mbd.mi[0]->mbmi.partition = partition;
#endif
  update_state(cpi, td, ctx, mi_row, mi_col, bsize, dry_run);
#if CONFIG_MOTION_VAR && CONFIG_NCOBMC
  mbmi = &xd->mi[0]->mbmi;
  const MOTION_MODE motion_allowed = motion_mode_allowed(
#if CONFIG_GLOBAL_MOTION && SEPARATE_GLOBAL_MOTION
      0, xd->global_motion,
#endif  // CONFIG_GLOBAL_MOTION && SEPARATE_GLOBAL_MOTION
      xd->mi[0]);
  check_ncobmc = is_inter_block(mbmi) && motion_allowed >= OBMC_CAUSAL;
  if (!dry_run && check_ncobmc) {
    av1_check_ncobmc_rd(cpi, x, mi_row, mi_col);
    av1_setup_dst_planes(x->e_mbd.plane, bsize,
                         get_frame_new_buffer(&cpi->common), mi_row, mi_col);
  }
#endif
  encode_superblock(cpi, td, tp, dry_run, mi_row, mi_col, bsize, rate);

  if (!dry_run) {
#if CONFIG_EXT_DELTA_Q
    mbmi = &xd->mi[0]->mbmi;
    if (bsize == BLOCK_64X64 && mbmi->skip == 1 && is_inter_block(mbmi) &&
        cpi->common.delta_lf_present_flag) {
      mbmi->current_delta_lf_from_base = xd->prev_delta_lf_from_base;
    }
#endif
#if CONFIG_SUPERTX
    update_stats(&cpi->common, td, mi_row, mi_col, 0);
#else
    update_stats(&cpi->common, td, mi_row, mi_col);
#endif
  }
}

static void encode_sb(const AV1_COMP *const cpi, ThreadData *td,
                      const TileInfo *const tile, TOKENEXTRA **tp, int mi_row,
                      int mi_col, RUN_TYPE dry_run, BLOCK_SIZE bsize,
                      PC_TREE *pc_tree, int *rate) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  const int hbs = mi_size_wide[bsize] / 2;
  const int is_partition_root = bsize >= BLOCK_8X8;
  const int ctx = is_partition_root
                      ? partition_plane_context(xd, mi_row, mi_col,
#if CONFIG_UNPOISON_PARTITION_CTX
                                                mi_row + hbs < cm->mi_rows,
                                                mi_col + hbs < cm->mi_cols,
#endif
                                                bsize)
                      : -1;
  const PARTITION_TYPE partition = pc_tree->partitioning;
  const BLOCK_SIZE subsize = get_subsize(bsize, partition);
#if CONFIG_EXT_PARTITION_TYPES
  const BLOCK_SIZE bsize2 = get_subsize(bsize, PARTITION_SPLIT);
#endif

#if CONFIG_CB4X4
  const int unify_bsize = 1;
#else
  const int unify_bsize = 0;
  assert(bsize >= BLOCK_8X8);
#endif

  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) return;

  if (!dry_run && ctx >= 0) td->counts->partition[ctx][partition]++;

#if CONFIG_SUPERTX
  if (!frame_is_intra_only(cm) && bsize <= MAX_SUPERTX_BLOCK_SIZE &&
      partition != PARTITION_NONE && !xd->lossless[0]) {
    int supertx_enabled;
    TX_SIZE supertx_size = max_txsize_lookup[bsize];
    supertx_enabled = check_supertx_sb(bsize, supertx_size, pc_tree);
    if (supertx_enabled) {
      const int mi_width = mi_size_wide[bsize];
      const int mi_height = mi_size_high[bsize];
      int x_idx, y_idx, i;
      uint8_t *dst_buf[3];
      int dst_stride[3];
      set_skip_context(xd, mi_row, mi_col);
      set_mode_info_offsets(cpi, x, xd, mi_row, mi_col);
      update_state_sb_supertx(cpi, td, tile, mi_row, mi_col, bsize, dry_run,
                              pc_tree);

      av1_setup_dst_planes(xd->plane, bsize, get_frame_new_buffer(cm), mi_row,
                           mi_col);
      for (i = 0; i < MAX_MB_PLANE; i++) {
        dst_buf[i] = xd->plane[i].dst.buf;
        dst_stride[i] = xd->plane[i].dst.stride;
      }
      predict_sb_complex(cpi, td, tile, mi_row, mi_col, mi_row, mi_col, dry_run,
                         bsize, bsize, dst_buf, dst_stride, pc_tree);

      set_offsets_without_segment_id(cpi, tile, x, mi_row, mi_col, bsize);
      set_segment_id_supertx(cpi, x, mi_row, mi_col, bsize);

      if (!x->skip) {
        int this_rate = 0;
        av1_encode_sb_supertx((AV1_COMMON *)cm, x, bsize);
        av1_tokenize_sb_supertx(cpi, td, tp, dry_run, bsize, rate);
        if (rate) *rate += this_rate;
      } else {
        xd->mi[0]->mbmi.skip = 1;
        if (!dry_run) td->counts->skip[av1_get_skip_context(xd)][1]++;
        reset_skip_context(xd, bsize);
      }
      if (!dry_run) {
        for (y_idx = 0; y_idx < mi_height; y_idx++)
          for (x_idx = 0; x_idx < mi_width; x_idx++) {
            if ((xd->mb_to_right_edge >> (3 + MI_SIZE_LOG2)) + mi_width >
                    x_idx &&
                (xd->mb_to_bottom_edge >> (3 + MI_SIZE_LOG2)) + mi_height >
                    y_idx) {
              xd->mi[x_idx + y_idx * cm->mi_stride]->mbmi.skip =
                  xd->mi[0]->mbmi.skip;
            }
          }
        td->counts->supertx[partition_supertx_context_lookup[partition]]
                           [supertx_size][1]++;
        td->counts->supertx_size[supertx_size]++;
#if CONFIG_EXT_TX
        if (get_ext_tx_types(supertx_size, bsize, 1, cm->reduced_tx_set_used) >
                1 &&
            !xd->mi[0]->mbmi.skip) {
          const int eset =
              get_ext_tx_set(supertx_size, bsize, 1, cm->reduced_tx_set_used);
          if (eset > 0) {
            ++td->counts
                  ->inter_ext_tx[eset][supertx_size][xd->mi[0]->mbmi.tx_type];
          }
        }
#else
        if (supertx_size < TX_32X32 && !xd->mi[0]->mbmi.skip) {
          ++td->counts->inter_ext_tx[supertx_size][xd->mi[0]->mbmi.tx_type];
        }
#endif  // CONFIG_EXT_TX
      }
#if CONFIG_EXT_PARTITION_TYPES
      update_ext_partition_context(xd, mi_row, mi_col, subsize, bsize,
                                   partition);
#else
      if (partition != PARTITION_SPLIT || bsize == BLOCK_8X8)
        update_partition_context(xd, mi_row, mi_col, subsize, bsize);
#endif
#if CONFIG_VAR_TX
      set_txfm_ctxs(supertx_size, mi_width, mi_height, xd->mi[0]->mbmi.skip,
                    xd);
#endif  // CONFIG_VAR_TX
      return;
    } else {
      if (!dry_run) {
        td->counts->supertx[partition_supertx_context_lookup[partition]]
                           [supertx_size][0]++;
      }
    }
  }
#endif  // CONFIG_SUPERTX

  switch (partition) {
    case PARTITION_NONE:
      encode_b(cpi, tile, td, tp, mi_row, mi_col, dry_run, subsize,
#if CONFIG_EXT_PARTITION_TYPES
               partition,
#endif
               &pc_tree->none, rate);
      break;
    case PARTITION_VERT:
      encode_b(cpi, tile, td, tp, mi_row, mi_col, dry_run, subsize,
#if CONFIG_EXT_PARTITION_TYPES
               partition,
#endif
               &pc_tree->vertical[0], rate);
      if (mi_col + hbs < cm->mi_cols && (bsize > BLOCK_8X8 || unify_bsize)) {
        encode_b(cpi, tile, td, tp, mi_row, mi_col + hbs, dry_run, subsize,
#if CONFIG_EXT_PARTITION_TYPES
                 partition,
#endif
                 &pc_tree->vertical[1], rate);
      }
      break;
    case PARTITION_HORZ:
      encode_b(cpi, tile, td, tp, mi_row, mi_col, dry_run, subsize,
#if CONFIG_EXT_PARTITION_TYPES
               partition,
#endif
               &pc_tree->horizontal[0], rate);
      if (mi_row + hbs < cm->mi_rows && (bsize > BLOCK_8X8 || unify_bsize)) {
        encode_b(cpi, tile, td, tp, mi_row + hbs, mi_col, dry_run, subsize,
#if CONFIG_EXT_PARTITION_TYPES
                 partition,
#endif
                 &pc_tree->horizontal[1], rate);
      }
      break;
    case PARTITION_SPLIT:
      if (bsize == BLOCK_8X8 && !unify_bsize) {
        encode_b(cpi, tile, td, tp, mi_row, mi_col, dry_run, subsize,
#if CONFIG_EXT_PARTITION_TYPES
                 partition,
#endif
                 pc_tree->leaf_split[0], rate);
      } else {
        encode_sb(cpi, td, tile, tp, mi_row, mi_col, dry_run, subsize,
                  pc_tree->split[0], rate);
        encode_sb(cpi, td, tile, tp, mi_row, mi_col + hbs, dry_run, subsize,
                  pc_tree->split[1], rate);
        encode_sb(cpi, td, tile, tp, mi_row + hbs, mi_col, dry_run, subsize,
                  pc_tree->split[2], rate);
        encode_sb(cpi, td, tile, tp, mi_row + hbs, mi_col + hbs, dry_run,
                  subsize, pc_tree->split[3], rate);
      }
      break;
#if CONFIG_EXT_PARTITION_TYPES
    case PARTITION_HORZ_A:
      encode_b(cpi, tile, td, tp, mi_row, mi_col, dry_run, bsize2, partition,
               &pc_tree->horizontala[0], rate);
      encode_b(cpi, tile, td, tp, mi_row, mi_col + hbs, dry_run, bsize2,
               partition, &pc_tree->horizontala[1], rate);
      encode_b(cpi, tile, td, tp, mi_row + hbs, mi_col, dry_run, subsize,
               partition, &pc_tree->horizontala[2], rate);
      break;
    case PARTITION_HORZ_B:
      encode_b(cpi, tile, td, tp, mi_row, mi_col, dry_run, subsize, partition,
               &pc_tree->horizontalb[0], rate);
      encode_b(cpi, tile, td, tp, mi_row + hbs, mi_col, dry_run, bsize2,
               partition, &pc_tree->horizontalb[1], rate);
      encode_b(cpi, tile, td, tp, mi_row + hbs, mi_col + hbs, dry_run, bsize2,
               partition, &pc_tree->horizontalb[2], rate);
      break;
    case PARTITION_VERT_A:
      encode_b(cpi, tile, td, tp, mi_row, mi_col, dry_run, bsize2, partition,
               &pc_tree->verticala[0], rate);
      encode_b(cpi, tile, td, tp, mi_row + hbs, mi_col, dry_run, bsize2,
               partition, &pc_tree->verticala[1], rate);
      encode_b(cpi, tile, td, tp, mi_row, mi_col + hbs, dry_run, subsize,
               partition, &pc_tree->verticala[2], rate);

      break;
    case PARTITION_VERT_B:
      encode_b(cpi, tile, td, tp, mi_row, mi_col, dry_run, subsize, partition,
               &pc_tree->verticalb[0], rate);
      encode_b(cpi, tile, td, tp, mi_row, mi_col + hbs, dry_run, bsize2,
               partition, &pc_tree->verticalb[1], rate);
      encode_b(cpi, tile, td, tp, mi_row + hbs, mi_col + hbs, dry_run, bsize2,
               partition, &pc_tree->verticalb[2], rate);
      break;
#endif  // CONFIG_EXT_PARTITION_TYPES
    default: assert(0 && "Invalid partition type."); break;
  }

#if CONFIG_EXT_PARTITION_TYPES
  update_ext_partition_context(xd, mi_row, mi_col, subsize, bsize, partition);
#else
  if (partition != PARTITION_SPLIT || bsize == BLOCK_8X8)
    update_partition_context(xd, mi_row, mi_col, subsize, bsize);
#endif  // CONFIG_EXT_PARTITION_TYPES
}

// Check to see if the given partition size is allowed for a specified number
// of mi block rows and columns remaining in the image.
// If not then return the largest allowed partition size
static BLOCK_SIZE find_partition_size(BLOCK_SIZE bsize, int rows_left,
                                      int cols_left, int *bh, int *bw) {
  if (rows_left <= 0 || cols_left <= 0) {
    return AOMMIN(bsize, BLOCK_8X8);
  } else {
    for (; bsize > 0; bsize -= 3) {
      *bh = mi_size_high[bsize];
      *bw = mi_size_wide[bsize];
      if ((*bh <= rows_left) && (*bw <= cols_left)) {
        break;
      }
    }
  }
  return bsize;
}

static void set_partial_sb_partition(const AV1_COMMON *const cm, MODE_INFO *mi,
                                     int bh_in, int bw_in,
                                     int mi_rows_remaining,
                                     int mi_cols_remaining, BLOCK_SIZE bsize,
                                     MODE_INFO **mib) {
  int bh = bh_in;
  int r, c;
  for (r = 0; r < cm->mib_size; r += bh) {
    int bw = bw_in;
    for (c = 0; c < cm->mib_size; c += bw) {
      const int index = r * cm->mi_stride + c;
      mib[index] = mi + index;
      mib[index]->mbmi.sb_type = find_partition_size(
          bsize, mi_rows_remaining - r, mi_cols_remaining - c, &bh, &bw);
    }
  }
}

// This function attempts to set all mode info entries in a given superblock
// to the same block partition size.
// However, at the bottom and right borders of the image the requested size
// may not be allowed in which case this code attempts to choose the largest
// allowable partition.
static void set_fixed_partitioning(AV1_COMP *cpi, const TileInfo *const tile,
                                   MODE_INFO **mib, int mi_row, int mi_col,
                                   BLOCK_SIZE bsize) {
  AV1_COMMON *const cm = &cpi->common;
  const int mi_rows_remaining = tile->mi_row_end - mi_row;
  const int mi_cols_remaining = tile->mi_col_end - mi_col;
  int block_row, block_col;
  MODE_INFO *const mi_upper_left = cm->mi + mi_row * cm->mi_stride + mi_col;
  int bh = mi_size_high[bsize];
  int bw = mi_size_wide[bsize];

  assert((mi_rows_remaining > 0) && (mi_cols_remaining > 0));

  // Apply the requested partition size to the SB if it is all "in image"
  if ((mi_cols_remaining >= cm->mib_size) &&
      (mi_rows_remaining >= cm->mib_size)) {
    for (block_row = 0; block_row < cm->mib_size; block_row += bh) {
      for (block_col = 0; block_col < cm->mib_size; block_col += bw) {
        int index = block_row * cm->mi_stride + block_col;
        mib[index] = mi_upper_left + index;
        mib[index]->mbmi.sb_type = bsize;
      }
    }
  } else {
    // Else this is a partial SB.
    set_partial_sb_partition(cm, mi_upper_left, bh, bw, mi_rows_remaining,
                             mi_cols_remaining, bsize, mib);
  }
}

static void rd_use_partition(AV1_COMP *cpi, ThreadData *td,
                             TileDataEnc *tile_data, MODE_INFO **mib,
                             TOKENEXTRA **tp, int mi_row, int mi_col,
                             BLOCK_SIZE bsize, int *rate, int64_t *dist,
#if CONFIG_SUPERTX
                             int *rate_nocoef,
#endif
                             int do_recon, PC_TREE *pc_tree) {
  AV1_COMMON *const cm = &cpi->common;
  TileInfo *const tile_info = &tile_data->tile_info;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  const int bs = mi_size_wide[bsize];
  const int hbs = bs / 2;
  int i;
  const int pl = (bsize >= BLOCK_8X8)
                     ? partition_plane_context(xd, mi_row, mi_col,
#if CONFIG_UNPOISON_PARTITION_CTX
                                               mi_row + hbs < cm->mi_rows,
                                               mi_col + hbs < cm->mi_cols,
#endif
                                               bsize)
                     : 0;
  const PARTITION_TYPE partition =
      (bsize >= BLOCK_8X8) ? get_partition(cm, mi_row, mi_col, bsize)
                           : PARTITION_NONE;
  const BLOCK_SIZE subsize = get_subsize(bsize, partition);
  RD_SEARCH_MACROBLOCK_CONTEXT x_ctx;
  RD_STATS last_part_rdc, none_rdc, chosen_rdc;
  BLOCK_SIZE sub_subsize = BLOCK_4X4;
  int splits_below = 0;
  BLOCK_SIZE bs_type = mib[0]->mbmi.sb_type;
  int do_partition_search = 1;
  PICK_MODE_CONTEXT *ctx_none = &pc_tree->none;
  const int unify_bsize = CONFIG_CB4X4;
#if CONFIG_SUPERTX
  int last_part_rate_nocoef = INT_MAX;
  int none_rate_nocoef = INT_MAX;
  int chosen_rate_nocoef = INT_MAX;
#endif
#if CONFIG_PVQ
  od_rollback_buffer pre_rdo_buf;
#endif
  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) return;

  assert(num_4x4_blocks_wide_lookup[bsize] ==
         num_4x4_blocks_high_lookup[bsize]);

  av1_invalid_rd_stats(&last_part_rdc);
  av1_invalid_rd_stats(&none_rdc);
  av1_invalid_rd_stats(&chosen_rdc);

  pc_tree->partitioning = partition;

#if CONFIG_VAR_TX
  xd->above_txfm_context = cm->above_txfm_context + mi_col;
  xd->left_txfm_context =
      xd->left_txfm_context_buffer + (mi_row & MAX_MIB_MASK);
#endif
#if !CONFIG_PVQ
  save_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
  save_context(x, &x_ctx, mi_row, mi_col, &pre_rdo_buf, bsize);
#endif

  if (bsize == BLOCK_16X16 && cpi->vaq_refresh) {
    set_offsets(cpi, tile_info, x, mi_row, mi_col, bsize);
    x->mb_energy = av1_block_energy(cpi, x, bsize);
  }

  if (do_partition_search &&
      cpi->sf.partition_search_type == SEARCH_PARTITION &&
      cpi->sf.adjust_partitioning_from_last_frame) {
    // Check if any of the sub blocks are further split.
    if (partition == PARTITION_SPLIT && subsize > BLOCK_8X8) {
      sub_subsize = get_subsize(subsize, PARTITION_SPLIT);
      splits_below = 1;
      for (i = 0; i < 4; i++) {
        int jj = i >> 1, ii = i & 0x01;
        MODE_INFO *this_mi = mib[jj * hbs * cm->mi_stride + ii * hbs];
        if (this_mi && this_mi->mbmi.sb_type >= sub_subsize) {
          splits_below = 0;
        }
      }
    }

    // If partition is not none try none unless each of the 4 splits are split
    // even further..
    if (partition != PARTITION_NONE && !splits_below &&
        mi_row + hbs < cm->mi_rows && mi_col + hbs < cm->mi_cols) {
      pc_tree->partitioning = PARTITION_NONE;
      rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col, &none_rdc,
#if CONFIG_SUPERTX
                       &none_rate_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_NONE,
#endif
                       bsize, ctx_none, INT64_MAX);

      if (none_rdc.rate < INT_MAX) {
        none_rdc.rate += cpi->partition_cost[pl][PARTITION_NONE];
        none_rdc.rdcost =
            RDCOST(x->rdmult, x->rddiv, none_rdc.rate, none_rdc.dist);
#if CONFIG_SUPERTX
        none_rate_nocoef += cpi->partition_cost[pl][PARTITION_NONE];
#endif
      }

#if !CONFIG_PVQ
      restore_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
      restore_context(x, &x_ctx, mi_row, mi_col, &pre_rdo_buf, bsize);
#endif
      mib[0]->mbmi.sb_type = bs_type;
      pc_tree->partitioning = partition;
    }
  }

  switch (partition) {
    case PARTITION_NONE:
      rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col, &last_part_rdc,
#if CONFIG_SUPERTX
                       &last_part_rate_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_NONE,
#endif
                       bsize, ctx_none, INT64_MAX);
      break;
    case PARTITION_HORZ:
      rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col, &last_part_rdc,
#if CONFIG_SUPERTX
                       &last_part_rate_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_HORZ,
#endif
                       subsize, &pc_tree->horizontal[0], INT64_MAX);
      if (last_part_rdc.rate != INT_MAX && bsize >= BLOCK_8X8 &&
          mi_row + hbs < cm->mi_rows) {
        RD_STATS tmp_rdc;
#if CONFIG_SUPERTX
        int rt_nocoef = 0;
#endif
        PICK_MODE_CONTEXT *ctx_h = &pc_tree->horizontal[0];
        av1_init_rd_stats(&tmp_rdc);
        update_state(cpi, td, ctx_h, mi_row, mi_col, subsize, 1);
        encode_superblock(cpi, td, tp, DRY_RUN_NORMAL, mi_row, mi_col, subsize,
                          NULL);
        rd_pick_sb_modes(cpi, tile_data, x, mi_row + hbs, mi_col, &tmp_rdc,
#if CONFIG_SUPERTX
                         &rt_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                         PARTITION_HORZ,
#endif
                         subsize, &pc_tree->horizontal[1], INT64_MAX);
        if (tmp_rdc.rate == INT_MAX || tmp_rdc.dist == INT64_MAX) {
          av1_invalid_rd_stats(&last_part_rdc);
#if CONFIG_SUPERTX
          last_part_rate_nocoef = INT_MAX;
#endif
          break;
        }
        last_part_rdc.rate += tmp_rdc.rate;
        last_part_rdc.dist += tmp_rdc.dist;
        last_part_rdc.rdcost += tmp_rdc.rdcost;
#if CONFIG_SUPERTX
        last_part_rate_nocoef += rt_nocoef;
#endif
      }
      break;
    case PARTITION_VERT:
      rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col, &last_part_rdc,
#if CONFIG_SUPERTX
                       &last_part_rate_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_VERT,
#endif
                       subsize, &pc_tree->vertical[0], INT64_MAX);
      if (last_part_rdc.rate != INT_MAX && bsize >= BLOCK_8X8 &&
          mi_col + hbs < cm->mi_cols) {
        RD_STATS tmp_rdc;
#if CONFIG_SUPERTX
        int rt_nocoef = 0;
#endif
        PICK_MODE_CONTEXT *ctx_v = &pc_tree->vertical[0];
        av1_init_rd_stats(&tmp_rdc);
        update_state(cpi, td, ctx_v, mi_row, mi_col, subsize, 1);
        encode_superblock(cpi, td, tp, DRY_RUN_NORMAL, mi_row, mi_col, subsize,
                          NULL);
        rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col + hbs, &tmp_rdc,
#if CONFIG_SUPERTX
                         &rt_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                         PARTITION_VERT,
#endif
                         subsize, &pc_tree->vertical[bsize > BLOCK_8X8],
                         INT64_MAX);
        if (tmp_rdc.rate == INT_MAX || tmp_rdc.dist == INT64_MAX) {
          av1_invalid_rd_stats(&last_part_rdc);
#if CONFIG_SUPERTX
          last_part_rate_nocoef = INT_MAX;
#endif
          break;
        }
        last_part_rdc.rate += tmp_rdc.rate;
        last_part_rdc.dist += tmp_rdc.dist;
        last_part_rdc.rdcost += tmp_rdc.rdcost;
#if CONFIG_SUPERTX
        last_part_rate_nocoef += rt_nocoef;
#endif
      }
      break;
    case PARTITION_SPLIT:
      if (bsize == BLOCK_8X8 && !unify_bsize) {
        rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col, &last_part_rdc,
#if CONFIG_SUPERTX
                         &last_part_rate_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                         PARTITION_SPLIT,
#endif
                         subsize, pc_tree->leaf_split[0], INT64_MAX);
        break;
      }
      last_part_rdc.rate = 0;
      last_part_rdc.dist = 0;
      last_part_rdc.rdcost = 0;
#if CONFIG_SUPERTX
      last_part_rate_nocoef = 0;
#endif
      for (i = 0; i < 4; i++) {
        int x_idx = (i & 1) * hbs;
        int y_idx = (i >> 1) * hbs;
        int jj = i >> 1, ii = i & 0x01;
        RD_STATS tmp_rdc;
#if CONFIG_SUPERTX
        int rt_nocoef;
#endif
        if ((mi_row + y_idx >= cm->mi_rows) || (mi_col + x_idx >= cm->mi_cols))
          continue;

        av1_init_rd_stats(&tmp_rdc);
        rd_use_partition(cpi, td, tile_data,
                         mib + jj * hbs * cm->mi_stride + ii * hbs, tp,
                         mi_row + y_idx, mi_col + x_idx, subsize, &tmp_rdc.rate,
                         &tmp_rdc.dist,
#if CONFIG_SUPERTX
                         &rt_nocoef,
#endif
                         i != 3, pc_tree->split[i]);
        if (tmp_rdc.rate == INT_MAX || tmp_rdc.dist == INT64_MAX) {
          av1_invalid_rd_stats(&last_part_rdc);
#if CONFIG_SUPERTX
          last_part_rate_nocoef = INT_MAX;
#endif
          break;
        }
        last_part_rdc.rate += tmp_rdc.rate;
        last_part_rdc.dist += tmp_rdc.dist;
#if CONFIG_SUPERTX
        last_part_rate_nocoef += rt_nocoef;
#endif
      }
      break;
#if CONFIG_EXT_PARTITION_TYPES
    case PARTITION_VERT_A:
    case PARTITION_VERT_B:
    case PARTITION_HORZ_A:
    case PARTITION_HORZ_B: assert(0 && "Cannot handle extended partiton types");
#endif  //  CONFIG_EXT_PARTITION_TYPES
    default: assert(0); break;
  }

  if (last_part_rdc.rate < INT_MAX) {
    last_part_rdc.rate += cpi->partition_cost[pl][partition];
    last_part_rdc.rdcost =
        RDCOST(x->rdmult, x->rddiv, last_part_rdc.rate, last_part_rdc.dist);
#if CONFIG_SUPERTX
    last_part_rate_nocoef += cpi->partition_cost[pl][partition];
#endif
  }

  if (do_partition_search && cpi->sf.adjust_partitioning_from_last_frame &&
      cpi->sf.partition_search_type == SEARCH_PARTITION &&
      partition != PARTITION_SPLIT && bsize > BLOCK_8X8 &&
      (mi_row + bs < cm->mi_rows || mi_row + hbs == cm->mi_rows) &&
      (mi_col + bs < cm->mi_cols || mi_col + hbs == cm->mi_cols)) {
    BLOCK_SIZE split_subsize = get_subsize(bsize, PARTITION_SPLIT);
    chosen_rdc.rate = 0;
    chosen_rdc.dist = 0;
#if CONFIG_SUPERTX
    chosen_rate_nocoef = 0;
#endif
#if !CONFIG_PVQ
    restore_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
    restore_context(x, &x_ctx, mi_row, mi_col, &pre_rdo_buf, bsize);
#endif
    pc_tree->partitioning = PARTITION_SPLIT;

    // Split partition.
    for (i = 0; i < 4; i++) {
      int x_idx = (i & 1) * hbs;
      int y_idx = (i >> 1) * hbs;
      RD_STATS tmp_rdc;
#if CONFIG_SUPERTX
      int rt_nocoef = 0;
#endif
#if CONFIG_PVQ
      od_rollback_buffer buf;
#endif
      if ((mi_row + y_idx >= cm->mi_rows) || (mi_col + x_idx >= cm->mi_cols))
        continue;

#if !CONFIG_PVQ
      save_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
      save_context(x, &x_ctx, mi_row, mi_col, &buf, bsize);
#endif
      pc_tree->split[i]->partitioning = PARTITION_NONE;
      rd_pick_sb_modes(cpi, tile_data, x, mi_row + y_idx, mi_col + x_idx,
                       &tmp_rdc,
#if CONFIG_SUPERTX
                       &rt_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_SPLIT,
#endif
                       split_subsize, &pc_tree->split[i]->none, INT64_MAX);

#if !CONFIG_PVQ
      restore_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
      restore_context(x, &x_ctx, mi_row, mi_col, &buf, bsize);
#endif
      if (tmp_rdc.rate == INT_MAX || tmp_rdc.dist == INT64_MAX) {
        av1_invalid_rd_stats(&chosen_rdc);
#if CONFIG_SUPERTX
        chosen_rate_nocoef = INT_MAX;
#endif
        break;
      }

      chosen_rdc.rate += tmp_rdc.rate;
      chosen_rdc.dist += tmp_rdc.dist;
#if CONFIG_SUPERTX
      chosen_rate_nocoef += rt_nocoef;
#endif

      if (i != 3)
        encode_sb(cpi, td, tile_info, tp, mi_row + y_idx, mi_col + x_idx,
                  OUTPUT_ENABLED, split_subsize, pc_tree->split[i], NULL);

      chosen_rdc.rate += cpi->partition_cost[pl][PARTITION_NONE];
#if CONFIG_SUPERTX
      chosen_rate_nocoef += cpi->partition_cost[pl][PARTITION_SPLIT];
#endif
    }
    if (chosen_rdc.rate < INT_MAX) {
      chosen_rdc.rate += cpi->partition_cost[pl][PARTITION_SPLIT];
      chosen_rdc.rdcost =
          RDCOST(x->rdmult, x->rddiv, chosen_rdc.rate, chosen_rdc.dist);
#if CONFIG_SUPERTX
      chosen_rate_nocoef += cpi->partition_cost[pl][PARTITION_NONE];
#endif
    }
  }

  // If last_part is better set the partitioning to that.
  if (last_part_rdc.rdcost < chosen_rdc.rdcost) {
    mib[0]->mbmi.sb_type = bsize;
    if (bsize >= BLOCK_8X8) pc_tree->partitioning = partition;
    chosen_rdc = last_part_rdc;
#if CONFIG_SUPERTX
    chosen_rate_nocoef = last_part_rate_nocoef;
#endif
  }
  // If none was better set the partitioning to that.
  if (none_rdc.rdcost < chosen_rdc.rdcost) {
    if (bsize >= BLOCK_8X8) pc_tree->partitioning = PARTITION_NONE;
    chosen_rdc = none_rdc;
#if CONFIG_SUPERTX
    chosen_rate_nocoef = none_rate_nocoef;
#endif
  }

#if !CONFIG_PVQ
  restore_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
  restore_context(x, &x_ctx, mi_row, mi_col, &pre_rdo_buf, bsize);
#endif

  // We must have chosen a partitioning and encoding or we'll fail later on.
  // No other opportunities for success.
  if (bsize == cm->sb_size)
    assert(chosen_rdc.rate < INT_MAX && chosen_rdc.dist < INT64_MAX);

  if (do_recon) {
    if (bsize == cm->sb_size) {
      // NOTE: To get estimate for rate due to the tokens, use:
      // int rate_coeffs = 0;
      // encode_sb(cpi, td, tile_info, tp, mi_row, mi_col, DRY_RUN_COSTCOEFFS,
      //           bsize, pc_tree, &rate_coeffs);
      encode_sb(cpi, td, tile_info, tp, mi_row, mi_col, OUTPUT_ENABLED, bsize,
                pc_tree, NULL);
    } else {
      encode_sb(cpi, td, tile_info, tp, mi_row, mi_col, DRY_RUN_NORMAL, bsize,
                pc_tree, NULL);
    }
  }

  *rate = chosen_rdc.rate;
  *dist = chosen_rdc.dist;
#if CONFIG_SUPERTX
  *rate_nocoef = chosen_rate_nocoef;
#endif
}

/* clang-format off */
static const BLOCK_SIZE min_partition_size[BLOCK_SIZES] = {
#if CONFIG_CB4X4
  BLOCK_2X2,   BLOCK_2X2,   BLOCK_2X2,    //    2x2,    2x4,     4x2
#endif
                            BLOCK_4X4,    //                     4x4
  BLOCK_4X4,   BLOCK_4X4,   BLOCK_4X4,    //    4x8,    8x4,     8x8
  BLOCK_4X4,   BLOCK_4X4,   BLOCK_8X8,    //   8x16,   16x8,   16x16
  BLOCK_8X8,   BLOCK_8X8,   BLOCK_16X16,  //  16x32,  32x16,   32x32
  BLOCK_16X16, BLOCK_16X16, BLOCK_16X16,  //  32x64,  64x32,   64x64
#if CONFIG_EXT_PARTITION
  BLOCK_16X16, BLOCK_16X16, BLOCK_16X16   // 64x128, 128x64, 128x128
#endif  // CONFIG_EXT_PARTITION
};

static const BLOCK_SIZE max_partition_size[BLOCK_SIZES] = {
#if CONFIG_CB4X4
  BLOCK_4X4,     BLOCK_4X4,       BLOCK_4X4,    //    2x2,    2x4,     4x2
#endif
                                  BLOCK_8X8,    //                     4x4
  BLOCK_16X16,   BLOCK_16X16,   BLOCK_16X16,    //    4x8,    8x4,     8x8
  BLOCK_32X32,   BLOCK_32X32,   BLOCK_32X32,    //   8x16,   16x8,   16x16
  BLOCK_64X64,   BLOCK_64X64,   BLOCK_64X64,    //  16x32,  32x16,   32x32
  BLOCK_LARGEST, BLOCK_LARGEST, BLOCK_LARGEST,  //  32x64,  64x32,   64x64
#if CONFIG_EXT_PARTITION
  BLOCK_LARGEST, BLOCK_LARGEST, BLOCK_LARGEST   // 64x128, 128x64, 128x128
#endif  // CONFIG_EXT_PARTITION
};

// Next square block size less or equal than current block size.
static const BLOCK_SIZE next_square_size[BLOCK_SIZES] = {
#if CONFIG_CB4X4
  BLOCK_2X2,   BLOCK_2X2,     BLOCK_2X2,    //    2x2,    2x4,     4x2
#endif
                              BLOCK_4X4,    //                     4x4
  BLOCK_4X4,   BLOCK_4X4,     BLOCK_8X8,    //    4x8,    8x4,     8x8
  BLOCK_8X8,   BLOCK_8X8,     BLOCK_16X16,  //   8x16,   16x8,   16x16
  BLOCK_16X16, BLOCK_16X16,   BLOCK_32X32,  //  16x32,  32x16,   32x32
  BLOCK_32X32, BLOCK_32X32,   BLOCK_64X64,  //  32x64,  64x32,   64x64
#if CONFIG_EXT_PARTITION
  BLOCK_64X64, BLOCK_64X64, BLOCK_128X128   // 64x128, 128x64, 128x128
#endif  // CONFIG_EXT_PARTITION
};
/* clang-format on */

// Look at all the mode_info entries for blocks that are part of this
// partition and find the min and max values for sb_type.
// At the moment this is designed to work on a superblock but could be
// adjusted to use a size parameter.
//
// The min and max are assumed to have been initialized prior to calling this
// function so repeat calls can accumulate a min and max of more than one
// superblock.
static void get_sb_partition_size_range(const AV1_COMMON *const cm,
                                        MACROBLOCKD *xd, MODE_INFO **mib,
                                        BLOCK_SIZE *min_block_size,
                                        BLOCK_SIZE *max_block_size) {
  int i, j;
  int index = 0;

  // Check the sb_type for each block that belongs to this region.
  for (i = 0; i < cm->mib_size; ++i) {
    for (j = 0; j < cm->mib_size; ++j) {
      MODE_INFO *mi = mib[index + j];
      BLOCK_SIZE sb_type = mi ? mi->mbmi.sb_type : BLOCK_4X4;
      *min_block_size = AOMMIN(*min_block_size, sb_type);
      *max_block_size = AOMMAX(*max_block_size, sb_type);
    }
    index += xd->mi_stride;
  }
}

// Look at neighboring blocks and set a min and max partition size based on
// what they chose.
static void rd_auto_partition_range(AV1_COMP *cpi, const TileInfo *const tile,
                                    MACROBLOCKD *const xd, int mi_row,
                                    int mi_col, BLOCK_SIZE *min_block_size,
                                    BLOCK_SIZE *max_block_size) {
  AV1_COMMON *const cm = &cpi->common;
  MODE_INFO **mi = xd->mi;
  const int left_in_image = xd->left_available && mi[-1];
  const int above_in_image = xd->up_available && mi[-xd->mi_stride];
  const int mi_rows_remaining = tile->mi_row_end - mi_row;
  const int mi_cols_remaining = tile->mi_col_end - mi_col;
  int bh, bw;
  BLOCK_SIZE min_size = BLOCK_4X4;
  BLOCK_SIZE max_size = BLOCK_LARGEST;

  // Trap case where we do not have a prediction.
  if (left_in_image || above_in_image || cm->frame_type != KEY_FRAME) {
    // Default "min to max" and "max to min"
    min_size = BLOCK_LARGEST;
    max_size = BLOCK_4X4;

    // NOTE: each call to get_sb_partition_size_range() uses the previous
    // passed in values for min and max as a starting point.
    // Find the min and max partition used in previous frame at this location
    if (cm->frame_type != KEY_FRAME) {
      MODE_INFO **prev_mi =
          &cm->prev_mi_grid_visible[mi_row * xd->mi_stride + mi_col];
      get_sb_partition_size_range(cm, xd, prev_mi, &min_size, &max_size);
    }
    // Find the min and max partition sizes used in the left superblock
    if (left_in_image) {
      MODE_INFO **left_sb_mi = &mi[-cm->mib_size];
      get_sb_partition_size_range(cm, xd, left_sb_mi, &min_size, &max_size);
    }
    // Find the min and max partition sizes used in the above suprblock.
    if (above_in_image) {
      MODE_INFO **above_sb_mi = &mi[-xd->mi_stride * cm->mib_size];
      get_sb_partition_size_range(cm, xd, above_sb_mi, &min_size, &max_size);
    }

    // Adjust observed min and max for "relaxed" auto partition case.
    if (cpi->sf.auto_min_max_partition_size == RELAXED_NEIGHBORING_MIN_MAX) {
      min_size = min_partition_size[min_size];
      max_size = max_partition_size[max_size];
    }
  }

  // Check border cases where max and min from neighbors may not be legal.
  max_size = find_partition_size(max_size, mi_rows_remaining, mi_cols_remaining,
                                 &bh, &bw);
  min_size = AOMMIN(min_size, max_size);

  // Test for blocks at the edge of the active image.
  // This may be the actual edge of the image or where there are formatting
  // bars.
  if (av1_active_edge_sb(cpi, mi_row, mi_col)) {
    min_size = BLOCK_4X4;
  } else {
    min_size = AOMMIN(cpi->sf.rd_auto_partition_min_limit, min_size);
  }

  // When use_square_partition_only is true, make sure at least one square
  // partition is allowed by selecting the next smaller square size as
  // *min_block_size.
  if (cpi->sf.use_square_partition_only) {
    min_size = AOMMIN(min_size, next_square_size[max_size]);
  }

  *min_block_size = AOMMIN(min_size, cm->sb_size);
  *max_block_size = AOMMIN(max_size, cm->sb_size);
}

// TODO(jingning) refactor functions setting partition search range
static void set_partition_range(const AV1_COMMON *const cm,
                                const MACROBLOCKD *const xd, int mi_row,
                                int mi_col, BLOCK_SIZE bsize,
                                BLOCK_SIZE *const min_bs,
                                BLOCK_SIZE *const max_bs) {
  const int mi_width = mi_size_wide[bsize];
  const int mi_height = mi_size_high[bsize];
  int idx, idy;

  const int idx_str = cm->mi_stride * mi_row + mi_col;
  MODE_INFO **const prev_mi = &cm->prev_mi_grid_visible[idx_str];
  BLOCK_SIZE min_size = BLOCK_64X64;  // default values
  BLOCK_SIZE max_size = BLOCK_4X4;

  if (prev_mi) {
    for (idy = 0; idy < mi_height; ++idy) {
      for (idx = 0; idx < mi_width; ++idx) {
        const MODE_INFO *const mi = prev_mi[idy * cm->mi_stride + idx];
        const BLOCK_SIZE bs = mi ? mi->mbmi.sb_type : bsize;
        min_size = AOMMIN(min_size, bs);
        max_size = AOMMAX(max_size, bs);
      }
    }
  }

  if (xd->left_available) {
    for (idy = 0; idy < mi_height; ++idy) {
      const MODE_INFO *const mi = xd->mi[idy * cm->mi_stride - 1];
      const BLOCK_SIZE bs = mi ? mi->mbmi.sb_type : bsize;
      min_size = AOMMIN(min_size, bs);
      max_size = AOMMAX(max_size, bs);
    }
  }

  if (xd->up_available) {
    for (idx = 0; idx < mi_width; ++idx) {
      const MODE_INFO *const mi = xd->mi[idx - cm->mi_stride];
      const BLOCK_SIZE bs = mi ? mi->mbmi.sb_type : bsize;
      min_size = AOMMIN(min_size, bs);
      max_size = AOMMAX(max_size, bs);
    }
  }

  if (min_size == max_size) {
    min_size = min_partition_size[min_size];
    max_size = max_partition_size[max_size];
  }

  *min_bs = AOMMIN(min_size, cm->sb_size);
  *max_bs = AOMMIN(max_size, cm->sb_size);
}

static INLINE void store_pred_mv(MACROBLOCK *x, PICK_MODE_CONTEXT *ctx) {
  memcpy(ctx->pred_mv, x->pred_mv, sizeof(x->pred_mv));
}

static INLINE void load_pred_mv(MACROBLOCK *x, PICK_MODE_CONTEXT *ctx) {
  memcpy(x->pred_mv, ctx->pred_mv, sizeof(x->pred_mv));
}

#if CONFIG_FP_MB_STATS
const int qindex_skip_threshold_lookup[BLOCK_SIZES] = {
  0,
  10,
  10,
  30,
  40,
  40,
  60,
  80,
  80,
  90,
  100,
  100,
  120,
#if CONFIG_EXT_PARTITION
  // TODO(debargha): What are the correct numbers here?
  130,
  130,
  150
#endif  // CONFIG_EXT_PARTITION
};
const int qindex_split_threshold_lookup[BLOCK_SIZES] = {
  0,
  3,
  3,
  7,
  15,
  15,
  30,
  40,
  40,
  60,
  80,
  80,
  120,
#if CONFIG_EXT_PARTITION
  // TODO(debargha): What are the correct numbers here?
  160,
  160,
  240
#endif  // CONFIG_EXT_PARTITION
};
const int complexity_16x16_blocks_threshold[BLOCK_SIZES] = {
  1,
  1,
  1,
  1,
  1,
  1,
  1,
  1,
  1,
  1,
  4,
  4,
  6,
#if CONFIG_EXT_PARTITION
  // TODO(debargha): What are the correct numbers here?
  8,
  8,
  10
#endif  // CONFIG_EXT_PARTITION
};

typedef enum {
  MV_ZERO = 0,
  MV_LEFT = 1,
  MV_UP = 2,
  MV_RIGHT = 3,
  MV_DOWN = 4,
  MV_INVALID
} MOTION_DIRECTION;

static INLINE MOTION_DIRECTION get_motion_direction_fp(uint8_t fp_byte) {
  if (fp_byte & FPMB_MOTION_ZERO_MASK) {
    return MV_ZERO;
  } else if (fp_byte & FPMB_MOTION_LEFT_MASK) {
    return MV_LEFT;
  } else if (fp_byte & FPMB_MOTION_RIGHT_MASK) {
    return MV_RIGHT;
  } else if (fp_byte & FPMB_MOTION_UP_MASK) {
    return MV_UP;
  } else {
    return MV_DOWN;
  }
}

static INLINE int get_motion_inconsistency(MOTION_DIRECTION this_mv,
                                           MOTION_DIRECTION that_mv) {
  if (this_mv == that_mv) {
    return 0;
  } else {
    return abs(this_mv - that_mv) == 2 ? 2 : 1;
  }
}
#endif

#if CONFIG_EXT_PARTITION_TYPES
static void rd_test_partition3(
    const AV1_COMP *const cpi, ThreadData *td, TileDataEnc *tile_data,
    TOKENEXTRA **tp, PC_TREE *pc_tree, RD_STATS *best_rdc,
    PICK_MODE_CONTEXT ctxs[3], PICK_MODE_CONTEXT *ctx, int mi_row, int mi_col,
    BLOCK_SIZE bsize, PARTITION_TYPE partition,
#if CONFIG_SUPERTX
    int64_t best_rd, int *best_rate_nocoef, RD_SEARCH_MACROBLOCK_CONTEXT *x_ctx,
#endif
    int mi_row0, int mi_col0, BLOCK_SIZE subsize0, int mi_row1, int mi_col1,
    BLOCK_SIZE subsize1, int mi_row2, int mi_col2, BLOCK_SIZE subsize2) {
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  RD_STATS this_rdc, sum_rdc;
#if CONFIG_SUPERTX
  const AV1_COMMON *const cm = &cpi->common;
  TileInfo *const tile_info = &tile_data->tile_info;
  int this_rate_nocoef, sum_rate_nocoef;
  int abort_flag;
  const int supertx_allowed = !frame_is_intra_only(cm) &&
                              bsize <= MAX_SUPERTX_BLOCK_SIZE &&
                              !xd->lossless[0];
#endif
  if (cpi->sf.adaptive_motion_search) load_pred_mv(x, ctx);

  rd_pick_sb_modes(cpi, tile_data, x, mi_row0, mi_col0, &sum_rdc,
#if CONFIG_SUPERTX
                   &sum_rate_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                   partition,
#endif
                   subsize0, &ctxs[0], best_rdc->rdcost);
#if CONFIG_SUPERTX
  abort_flag = sum_rdc.rdcost >= best_rd;
#endif

#if CONFIG_SUPERTX
  if (sum_rdc.rdcost < INT64_MAX) {
#else
  if (sum_rdc.rdcost < best_rdc->rdcost) {
#endif
    PICK_MODE_CONTEXT *ctx_0 = &ctxs[0];
    update_state(cpi, td, ctx_0, mi_row0, mi_col0, subsize0, 1);
    encode_superblock(cpi, td, tp, DRY_RUN_NORMAL, mi_row0, mi_col0, subsize0,
                      NULL);

    if (cpi->sf.adaptive_motion_search) load_pred_mv(x, ctx_0);

#if CONFIG_SUPERTX
    rd_pick_sb_modes(cpi, tile_data, x, mi_row1, mi_col1, &this_rdc,
                     &this_rate_nocoef,
#if CONFIG_EXT_PARTITION_TYPES
                     partition,
#endif
                     subsize1, &ctxs[1], INT64_MAX - sum_rdc.rdcost);
#else
    rd_pick_sb_modes(cpi, tile_data, x, mi_row1, mi_col1, &this_rdc,
#if CONFIG_EXT_PARTITION_TYPES
                     partition,
#endif
                     subsize1, &ctxs[1], best_rdc->rdcost - sum_rdc.rdcost);
#endif  // CONFIG_SUPERTX

    if (this_rdc.rate == INT_MAX) {
      sum_rdc.rdcost = INT64_MAX;
#if CONFIG_SUPERTX
      sum_rate_nocoef = INT_MAX;
#endif
    } else {
      sum_rdc.rate += this_rdc.rate;
      sum_rdc.dist += this_rdc.dist;
      sum_rdc.rdcost += this_rdc.rdcost;
#if CONFIG_SUPERTX
      sum_rate_nocoef += this_rate_nocoef;
#endif
    }

#if CONFIG_SUPERTX
    if (sum_rdc.rdcost < INT64_MAX) {
#else
    if (sum_rdc.rdcost < best_rdc->rdcost) {
#endif
      PICK_MODE_CONTEXT *ctx_1 = &ctxs[1];
      update_state(cpi, td, ctx_1, mi_row1, mi_col1, subsize1, 1);
      encode_superblock(cpi, td, tp, DRY_RUN_NORMAL, mi_row1, mi_col1, subsize1,
                        NULL);

      if (cpi->sf.adaptive_motion_search) load_pred_mv(x, ctx_1);

#if CONFIG_SUPERTX
      rd_pick_sb_modes(cpi, tile_data, x, mi_row2, mi_col2, &this_rdc,
                       &this_rate_nocoef,
#if CONFIG_EXT_PARTITION_TYPES
                       partition,
#endif
                       subsize2, &ctxs[2], INT64_MAX - sum_rdc.rdcost);
#else
      rd_pick_sb_modes(cpi, tile_data, x, mi_row2, mi_col2, &this_rdc,
#if CONFIG_EXT_PARTITION_TYPES
                       partition,
#endif
                       subsize2, &ctxs[2], best_rdc->rdcost - sum_rdc.rdcost);
#endif  // CONFIG_SUPERTX

      if (this_rdc.rate == INT_MAX) {
        sum_rdc.rdcost = INT64_MAX;
#if CONFIG_SUPERTX
        sum_rate_nocoef = INT_MAX;
#endif
      } else {
        sum_rdc.rate += this_rdc.rate;
        sum_rdc.dist += this_rdc.dist;
        sum_rdc.rdcost += this_rdc.rdcost;
#if CONFIG_SUPERTX
        sum_rate_nocoef += this_rate_nocoef;
#endif
      }

#if CONFIG_SUPERTX
      if (supertx_allowed && !abort_flag && sum_rdc.rdcost < INT64_MAX) {
        TX_SIZE supertx_size = max_txsize_lookup[bsize];
        const PARTITION_TYPE best_partition = pc_tree->partitioning;
        pc_tree->partitioning = partition;
        sum_rdc.rate += av1_cost_bit(
            cm->fc->supertx_prob[partition_supertx_context_lookup[partition]]
                                [supertx_size],
            0);
        sum_rdc.rdcost =
            RDCOST(x->rdmult, x->rddiv, sum_rdc.rate, sum_rdc.dist);

        if (!check_intra_sb(cpi, tile_info, mi_row, mi_col, bsize, pc_tree)) {
          TX_TYPE best_tx = DCT_DCT;
          RD_STATS tmp_rdc = { sum_rate_nocoef, 0, 0 };

          restore_context(x, x_ctx, mi_row, mi_col, bsize);

          rd_supertx_sb(cpi, td, tile_info, mi_row, mi_col, bsize,
                        &tmp_rdc.rate, &tmp_rdc.dist, &best_tx, pc_tree);

          tmp_rdc.rate += av1_cost_bit(
              cm->fc->supertx_prob[partition_supertx_context_lookup[partition]]
                                  [supertx_size],
              1);
          tmp_rdc.rdcost =
              RDCOST(x->rdmult, x->rddiv, tmp_rdc.rate, tmp_rdc.dist);
          if (tmp_rdc.rdcost < sum_rdc.rdcost) {
            sum_rdc = tmp_rdc;
            update_supertx_param_sb(cpi, td, mi_row, mi_col, bsize, best_tx,
                                    supertx_size, pc_tree);
          }
        }

        pc_tree->partitioning = best_partition;
      }
#endif  // CONFIG_SUPERTX

      if (sum_rdc.rdcost < best_rdc->rdcost) {
        int pl = partition_plane_context(xd, mi_row, mi_col,
#if CONFIG_UNPOISON_PARTITION_CTX
                                         has_rows, has_cols,
#endif
                                         bsize);
        sum_rdc.rate += cpi->partition_cost[pl][partition];
        sum_rdc.rdcost =
            RDCOST(x->rdmult, x->rddiv, sum_rdc.rate, sum_rdc.dist);
#if CONFIG_SUPERTX
        sum_rate_nocoef += cpi->partition_cost[pl][partition];
#endif
        if (sum_rdc.rdcost < best_rdc->rdcost) {
#if CONFIG_SUPERTX
          *best_rate_nocoef = sum_rate_nocoef;
          assert(*best_rate_nocoef >= 0);
#endif
          *best_rdc = sum_rdc;
          pc_tree->partitioning = partition;
        }
      }
    }
  }
}
#endif  // CONFIG_EXT_PARTITION_TYPES

// TODO(jingning,jimbankoski,rbultje): properly skip partition types that are
// unlikely to be selected depending on previous rate-distortion optimization
// results, for encoding speed-up.
static void rd_pick_partition(const AV1_COMP *const cpi, ThreadData *td,
                              TileDataEnc *tile_data, TOKENEXTRA **tp,
                              int mi_row, int mi_col, BLOCK_SIZE bsize,
                              RD_STATS *rd_cost,
#if CONFIG_SUPERTX
                              int *rate_nocoef,
#endif
                              int64_t best_rd, PC_TREE *pc_tree) {
  const AV1_COMMON *const cm = &cpi->common;
  TileInfo *const tile_info = &tile_data->tile_info;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  const int mi_step = mi_size_wide[bsize] / 2;
  RD_SEARCH_MACROBLOCK_CONTEXT x_ctx;
  const TOKENEXTRA *const tp_orig = *tp;
  PICK_MODE_CONTEXT *ctx_none = &pc_tree->none;
#if CONFIG_UNPOISON_PARTITION_CTX
  const int hbs = mi_size_wide[bsize] / 2;
  const int has_rows = mi_row + hbs < cm->mi_rows;
  const int has_cols = mi_col + hbs < cm->mi_cols;
#else
  int tmp_partition_cost[PARTITION_TYPES];
#endif
  BLOCK_SIZE subsize;
  RD_STATS this_rdc, sum_rdc, best_rdc;
  const int bsize_at_least_8x8 = (bsize >= BLOCK_8X8);
  int do_square_split = bsize_at_least_8x8;
#if CONFIG_CB4X4
  const int unify_bsize = 1;
  const int pl = bsize_at_least_8x8
                     ? partition_plane_context(xd, mi_row, mi_col,
#if CONFIG_UNPOISON_PARTITION_CTX
                                               has_rows, has_cols,
#endif
                                               bsize)
                     : 0;
#else
  const int unify_bsize = 0;
  const int pl = partition_plane_context(xd, mi_row, mi_col,
#if CONFIG_UNPOISON_PARTITION_CTX
                                         has_rows, has_cols,
#endif
                                         bsize);
#endif  // CONFIG_CB4X4
  const int *partition_cost = cpi->partition_cost[pl];
#if CONFIG_SUPERTX
  int this_rate_nocoef, sum_rate_nocoef = 0, best_rate_nocoef = INT_MAX;
  int abort_flag;
  const int supertx_allowed = !frame_is_intra_only(cm) &&
                              bsize <= MAX_SUPERTX_BLOCK_SIZE &&
                              !xd->lossless[0];
#endif  // CONFIG_SUPERTX

  int do_rectangular_split = 1;
#if CONFIG_EXT_PARTITION_TYPES
  BLOCK_SIZE bsize2 = get_subsize(bsize, PARTITION_SPLIT);
#endif

  // Override skipping rectangular partition operations for edge blocks
  const int force_horz_split = (mi_row + mi_step >= cm->mi_rows);
  const int force_vert_split = (mi_col + mi_step >= cm->mi_cols);
  const int xss = x->e_mbd.plane[1].subsampling_x;
  const int yss = x->e_mbd.plane[1].subsampling_y;

  BLOCK_SIZE min_size = x->min_partition_size;
  BLOCK_SIZE max_size = x->max_partition_size;

#if CONFIG_FP_MB_STATS
  unsigned int src_diff_var = UINT_MAX;
  int none_complexity = 0;
#endif

  int partition_none_allowed = !force_horz_split && !force_vert_split;
  int partition_horz_allowed =
      !force_vert_split && yss <= xss && bsize_at_least_8x8;
  int partition_vert_allowed =
      !force_horz_split && xss <= yss && bsize_at_least_8x8;

#if CONFIG_PVQ
  od_rollback_buffer pre_rdo_buf;
#endif

  (void)*tp_orig;

#if !CONFIG_UNPOISON_PARTITION_CTX
  if (force_horz_split || force_vert_split) {
    tmp_partition_cost[PARTITION_NONE] = INT_MAX;

    if (!force_vert_split) {  // force_horz_split only
      tmp_partition_cost[PARTITION_VERT] = INT_MAX;
      tmp_partition_cost[PARTITION_HORZ] =
          av1_cost_bit(cm->fc->partition_prob[pl][PARTITION_HORZ], 0);
      tmp_partition_cost[PARTITION_SPLIT] =
          av1_cost_bit(cm->fc->partition_prob[pl][PARTITION_HORZ], 1);
    } else if (!force_horz_split) {  // force_vert_split only
      tmp_partition_cost[PARTITION_HORZ] = INT_MAX;
      tmp_partition_cost[PARTITION_VERT] =
          av1_cost_bit(cm->fc->partition_prob[pl][PARTITION_VERT], 0);
      tmp_partition_cost[PARTITION_SPLIT] =
          av1_cost_bit(cm->fc->partition_prob[pl][PARTITION_VERT], 1);
    } else {  // force_ horz_split && force_vert_split horz_split
      tmp_partition_cost[PARTITION_HORZ] = INT_MAX;
      tmp_partition_cost[PARTITION_VERT] = INT_MAX;
      tmp_partition_cost[PARTITION_SPLIT] = 0;
    }

    partition_cost = tmp_partition_cost;
  }
#endif

#if CONFIG_VAR_TX
#ifndef NDEBUG
  // Nothing should rely on the default value of this array (which is just
  // leftover from encoding the previous block. Setting it to magic number
  // when debugging.
  memset(x->blk_skip[0], 234, sizeof(x->blk_skip[0]));
#endif  // NDEBUG
#endif  // CONFIG_VAR_TX

  assert(mi_size_wide[bsize] == mi_size_high[bsize]);

  av1_init_rd_stats(&this_rdc);
  av1_init_rd_stats(&sum_rdc);
  av1_invalid_rd_stats(&best_rdc);
  best_rdc.rdcost = best_rd;

  set_offsets(cpi, tile_info, x, mi_row, mi_col, bsize);

  if (bsize == BLOCK_16X16 && cpi->vaq_refresh)
    x->mb_energy = av1_block_energy(cpi, x, bsize);

  if (cpi->sf.cb_partition_search && bsize == BLOCK_16X16) {
    const int cb_partition_search_ctrl =
        ((pc_tree->index == 0 || pc_tree->index == 3) +
         get_chessboard_index(cm->current_video_frame)) &
        0x1;

    if (cb_partition_search_ctrl && bsize > min_size && bsize < max_size)
      set_partition_range(cm, xd, mi_row, mi_col, bsize, &min_size, &max_size);
  }

  // Determine partition types in search according to the speed features.
  // The threshold set here has to be of square block size.
  if (cpi->sf.auto_min_max_partition_size) {
    const int no_partition_allowed = (bsize <= max_size && bsize >= min_size);
    // Note: Further partitioning is NOT allowed when bsize == min_size already.
    const int partition_allowed = (bsize <= max_size && bsize > min_size);
    partition_none_allowed &= no_partition_allowed;
    partition_horz_allowed &= partition_allowed || force_horz_split;
    partition_vert_allowed &= partition_allowed || force_vert_split;
    do_square_split &= bsize > min_size;
  }
  if (cpi->sf.use_square_partition_only) {
    partition_horz_allowed &= force_horz_split;
    partition_vert_allowed &= force_vert_split;
  }

#if CONFIG_VAR_TX
  xd->above_txfm_context = cm->above_txfm_context + mi_col;
  xd->left_txfm_context =
      xd->left_txfm_context_buffer + (mi_row & MAX_MIB_MASK);
#endif
#if !CONFIG_PVQ
  save_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
  save_context(x, &x_ctx, mi_row, mi_col, &pre_rdo_buf, bsize);
#endif

#if CONFIG_FP_MB_STATS
  if (cpi->use_fp_mb_stats) {
    set_offsets(cpi, tile_info, x, mi_row, mi_col, bsize);
    src_diff_var = get_sby_perpixel_diff_variance(cpi, &x->plane[0].src, mi_row,
                                                  mi_col, bsize);
  }
#endif

#if CONFIG_FP_MB_STATS
  // Decide whether we shall split directly and skip searching NONE by using
  // the first pass block statistics
  if (cpi->use_fp_mb_stats && bsize >= BLOCK_32X32 && do_square_split &&
      partition_none_allowed && src_diff_var > 4 &&
      cm->base_qindex < qindex_split_threshold_lookup[bsize]) {
    int mb_row = mi_row >> 1;
    int mb_col = mi_col >> 1;
    int mb_row_end =
        AOMMIN(mb_row + num_16x16_blocks_high_lookup[bsize], cm->mb_rows);
    int mb_col_end =
        AOMMIN(mb_col + num_16x16_blocks_wide_lookup[bsize], cm->mb_cols);
    int r, c;

    // compute a complexity measure, basically measure inconsistency of motion
    // vectors obtained from the first pass in the current block
    for (r = mb_row; r < mb_row_end; r++) {
      for (c = mb_col; c < mb_col_end; c++) {
        const int mb_index = r * cm->mb_cols + c;

        MOTION_DIRECTION this_mv;
        MOTION_DIRECTION right_mv;
        MOTION_DIRECTION bottom_mv;

        this_mv =
            get_motion_direction_fp(cpi->twopass.this_frame_mb_stats[mb_index]);

        // to its right
        if (c != mb_col_end - 1) {
          right_mv = get_motion_direction_fp(
              cpi->twopass.this_frame_mb_stats[mb_index + 1]);
          none_complexity += get_motion_inconsistency(this_mv, right_mv);
        }

        // to its bottom
        if (r != mb_row_end - 1) {
          bottom_mv = get_motion_direction_fp(
              cpi->twopass.this_frame_mb_stats[mb_index + cm->mb_cols]);
          none_complexity += get_motion_inconsistency(this_mv, bottom_mv);
        }

        // do not count its left and top neighbors to avoid double counting
      }
    }

    if (none_complexity > complexity_16x16_blocks_threshold[bsize]) {
      partition_none_allowed = 0;
    }
  }
#endif

  // PARTITION_NONE
  if (partition_none_allowed) {
    rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col, &this_rdc,
#if CONFIG_SUPERTX
                     &this_rate_nocoef,
#endif
#if CONFIG_EXT_PARTITION_TYPES
                     PARTITION_NONE,
#endif
                     bsize, ctx_none, best_rdc.rdcost);
    if (this_rdc.rate != INT_MAX) {
      if (bsize_at_least_8x8) {
        this_rdc.rate += partition_cost[PARTITION_NONE];
        this_rdc.rdcost =
            RDCOST(x->rdmult, x->rddiv, this_rdc.rate, this_rdc.dist);
#if CONFIG_SUPERTX
        this_rate_nocoef += partition_cost[PARTITION_NONE];
#endif
      }

      if (this_rdc.rdcost < best_rdc.rdcost) {
        // Adjust dist breakout threshold according to the partition size.
        const int64_t dist_breakout_thr =
            cpi->sf.partition_search_breakout_dist_thr >>
            ((2 * (MAX_SB_SIZE_LOG2 - 2)) -
             (b_width_log2_lookup[bsize] + b_height_log2_lookup[bsize]));
        const int rate_breakout_thr =
            cpi->sf.partition_search_breakout_rate_thr *
            num_pels_log2_lookup[bsize];

        best_rdc = this_rdc;
#if CONFIG_SUPERTX
        best_rate_nocoef = this_rate_nocoef;
        assert(best_rate_nocoef >= 0);
#endif
        if (bsize_at_least_8x8) pc_tree->partitioning = PARTITION_NONE;

        // If all y, u, v transform blocks in this partition are skippable, and
        // the dist & rate are within the thresholds, the partition search is
        // terminated for current branch of the partition search tree.
        // The dist & rate thresholds are set to 0 at speed 0 to disable the
        // early termination at that speed.
        if (!x->e_mbd.lossless[xd->mi[0]->mbmi.segment_id] &&
            (ctx_none->skippable && best_rdc.dist < dist_breakout_thr &&
             best_rdc.rate < rate_breakout_thr)) {
          do_square_split = 0;
          do_rectangular_split = 0;
        }

#if CONFIG_FP_MB_STATS
        // Check if every 16x16 first pass block statistics has zero
        // motion and the corresponding first pass residue is small enough.
        // If that is the case, check the difference variance between the
        // current frame and the last frame. If the variance is small enough,
        // stop further splitting in RD optimization
        if (cpi->use_fp_mb_stats && do_square_split &&
            cm->base_qindex > qindex_skip_threshold_lookup[bsize]) {
          int mb_row = mi_row >> 1;
          int mb_col = mi_col >> 1;
          int mb_row_end =
              AOMMIN(mb_row + num_16x16_blocks_high_lookup[bsize], cm->mb_rows);
          int mb_col_end =
              AOMMIN(mb_col + num_16x16_blocks_wide_lookup[bsize], cm->mb_cols);
          int r, c;

          int skip = 1;
          for (r = mb_row; r < mb_row_end; r++) {
            for (c = mb_col; c < mb_col_end; c++) {
              const int mb_index = r * cm->mb_cols + c;
              if (!(cpi->twopass.this_frame_mb_stats[mb_index] &
                    FPMB_MOTION_ZERO_MASK) ||
                  !(cpi->twopass.this_frame_mb_stats[mb_index] &
                    FPMB_ERROR_SMALL_MASK)) {
                skip = 0;
                break;
              }
            }
            if (skip == 0) {
              break;
            }
          }
          if (skip) {
            if (src_diff_var == UINT_MAX) {
              set_offsets(cpi, tile_info, x, mi_row, mi_col, bsize);
              src_diff_var = get_sby_perpixel_diff_variance(
                  cpi, &x->plane[0].src, mi_row, mi_col, bsize);
            }
            if (src_diff_var < 8) {
              do_square_split = 0;
              do_rectangular_split = 0;
            }
          }
        }
#endif
      }
    }
#if !CONFIG_PVQ
    restore_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
    restore_context(x, &x_ctx, mi_row, mi_col, &pre_rdo_buf, bsize);
#endif
  }

  // store estimated motion vector
  if (cpi->sf.adaptive_motion_search) store_pred_mv(x, ctx_none);

  // PARTITION_SPLIT
  // TODO(jingning): use the motion vectors given by the above search as
  // the starting point of motion search in the following partition type check.
  if (do_square_split) {
    int reached_last_index = 0;
    subsize = get_subsize(bsize, PARTITION_SPLIT);
    if (bsize == BLOCK_8X8 && !unify_bsize) {
#if CONFIG_DUAL_FILTER
      if (cpi->sf.adaptive_pred_interp_filter && partition_none_allowed)
        pc_tree->leaf_split[0]->pred_interp_filter =
            ctx_none->mic.mbmi.interp_filter[0];
#else
      if (cpi->sf.adaptive_pred_interp_filter && partition_none_allowed)
        pc_tree->leaf_split[0]->pred_interp_filter =
            ctx_none->mic.mbmi.interp_filter;
#endif
#if CONFIG_SUPERTX
      rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col, &sum_rdc,
                       &sum_rate_nocoef,
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_SPLIT,
#endif
                       subsize, pc_tree->leaf_split[0], INT64_MAX);
#else
      rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col, &sum_rdc,
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_SPLIT,
#endif
                       subsize, pc_tree->leaf_split[0], best_rdc.rdcost);
#endif  // CONFIG_SUPERTX
      if (sum_rdc.rate == INT_MAX) {
        sum_rdc.rdcost = INT64_MAX;
#if CONFIG_SUPERTX
        sum_rate_nocoef = INT_MAX;
#endif
      }
#if CONFIG_SUPERTX
      if (supertx_allowed && sum_rdc.rdcost < INT64_MAX) {
        TX_SIZE supertx_size = max_txsize_lookup[bsize];
        const PARTITION_TYPE best_partition = pc_tree->partitioning;

        pc_tree->partitioning = PARTITION_SPLIT;

        sum_rdc.rate += av1_cost_bit(
            cm->fc->supertx_prob[partition_supertx_context_lookup
                                     [PARTITION_SPLIT]][supertx_size],
            0);
        sum_rdc.rdcost =
            RDCOST(x->rdmult, x->rddiv, sum_rdc.rate, sum_rdc.dist);

        if (is_inter_mode(pc_tree->leaf_split[0]->mic.mbmi.mode)) {
          TX_TYPE best_tx = DCT_DCT;
          RD_STATS tmp_rdc;
          av1_init_rd_stats(&tmp_rdc);
          tmp_rdc.rate = sum_rate_nocoef;

          restore_context(x, &x_ctx, mi_row, mi_col, bsize);

          rd_supertx_sb(cpi, td, tile_info, mi_row, mi_col, bsize,
                        &tmp_rdc.rate, &tmp_rdc.dist, &best_tx, pc_tree);

          tmp_rdc.rate += av1_cost_bit(
              cm->fc->supertx_prob[partition_supertx_context_lookup
                                       [PARTITION_SPLIT]][supertx_size],
              1);
          tmp_rdc.rdcost =
              RDCOST(x->rdmult, x->rddiv, tmp_rdc.rate, tmp_rdc.dist);
          if (tmp_rdc.rdcost < sum_rdc.rdcost) {
            sum_rdc = tmp_rdc;
            update_supertx_param_sb(cpi, td, mi_row, mi_col, bsize, best_tx,
                                    supertx_size, pc_tree);
          }
        }

        pc_tree->partitioning = best_partition;
      }
#endif  // CONFIG_SUPERTX
      reached_last_index = 1;
    } else {
      int idx;
#if CONFIG_SUPERTX
      for (idx = 0; idx < 4 && sum_rdc.rdcost < INT64_MAX; ++idx) {
#else
      for (idx = 0; idx < 4 && sum_rdc.rdcost < best_rdc.rdcost; ++idx) {
#endif  // CONFIG_SUPERTX
        const int x_idx = (idx & 1) * mi_step;
        const int y_idx = (idx >> 1) * mi_step;

        if (mi_row + y_idx >= cm->mi_rows || mi_col + x_idx >= cm->mi_cols)
          continue;

        if (cpi->sf.adaptive_motion_search) load_pred_mv(x, ctx_none);

        pc_tree->split[idx]->index = idx;
#if CONFIG_SUPERTX
        rd_pick_partition(cpi, td, tile_data, tp, mi_row + y_idx,
                          mi_col + x_idx, subsize, &this_rdc, &this_rate_nocoef,
                          INT64_MAX - sum_rdc.rdcost, pc_tree->split[idx]);
#else
        rd_pick_partition(
            cpi, td, tile_data, tp, mi_row + y_idx, mi_col + x_idx, subsize,
            &this_rdc, best_rdc.rdcost - sum_rdc.rdcost, pc_tree->split[idx]);
#endif  // CONFIG_SUPERTX

        if (this_rdc.rate == INT_MAX) {
          sum_rdc.rdcost = INT64_MAX;
#if CONFIG_SUPERTX
          sum_rate_nocoef = INT_MAX;
#endif  // CONFIG_SUPERTX
          break;
        } else {
          sum_rdc.rate += this_rdc.rate;
          sum_rdc.dist += this_rdc.dist;
          sum_rdc.rdcost += this_rdc.rdcost;
#if CONFIG_SUPERTX
          sum_rate_nocoef += this_rate_nocoef;
#endif  // CONFIG_SUPERTX
        }
      }
      reached_last_index = (idx == 4);
#if CONFIG_SUPERTX
      if (supertx_allowed && sum_rdc.rdcost < INT64_MAX && reached_last_index) {
        TX_SIZE supertx_size = max_txsize_lookup[bsize];
        const PARTITION_TYPE best_partition = pc_tree->partitioning;

        pc_tree->partitioning = PARTITION_SPLIT;

        sum_rdc.rate += av1_cost_bit(
            cm->fc->supertx_prob[partition_supertx_context_lookup
                                     [PARTITION_SPLIT]][supertx_size],
            0);
        sum_rdc.rdcost =
            RDCOST(x->rdmult, x->rddiv, sum_rdc.rate, sum_rdc.dist);

        if (!check_intra_sb(cpi, tile_info, mi_row, mi_col, bsize, pc_tree)) {
          TX_TYPE best_tx = DCT_DCT;
          RD_STATS tmp_rdc;
          av1_init_rd_stats(&tmp_rdc);
          tmp_rdc.rate = sum_rate_nocoef;

          restore_context(x, &x_ctx, mi_row, mi_col, bsize);

          rd_supertx_sb(cpi, td, tile_info, mi_row, mi_col, bsize,
                        &tmp_rdc.rate, &tmp_rdc.dist, &best_tx, pc_tree);

          tmp_rdc.rate += av1_cost_bit(
              cm->fc->supertx_prob[partition_supertx_context_lookup
                                       [PARTITION_SPLIT]][supertx_size],
              1);
          tmp_rdc.rdcost =
              RDCOST(x->rdmult, x->rddiv, tmp_rdc.rate, tmp_rdc.dist);
          if (tmp_rdc.rdcost < sum_rdc.rdcost) {
            sum_rdc = tmp_rdc;
            update_supertx_param_sb(cpi, td, mi_row, mi_col, bsize, best_tx,
                                    supertx_size, pc_tree);
          }
        }

        pc_tree->partitioning = best_partition;
      }
#endif  // CONFIG_SUPERTX
    }

    if (reached_last_index && sum_rdc.rdcost < best_rdc.rdcost) {
      sum_rdc.rate += partition_cost[PARTITION_SPLIT];
      sum_rdc.rdcost = RDCOST(x->rdmult, x->rddiv, sum_rdc.rate, sum_rdc.dist);
#if CONFIG_SUPERTX
      sum_rate_nocoef += partition_cost[PARTITION_SPLIT];
#endif  // CONFIG_SUPERTX

      if (sum_rdc.rdcost < best_rdc.rdcost) {
        best_rdc = sum_rdc;
#if CONFIG_SUPERTX
        best_rate_nocoef = sum_rate_nocoef;
        assert(best_rate_nocoef >= 0);
#endif  // CONFIG_SUPERTX
        pc_tree->partitioning = PARTITION_SPLIT;
      }
    } else if (cpi->sf.less_rectangular_check) {
      // skip rectangular partition test when larger block size
      // gives better rd cost
      do_rectangular_split &= !partition_none_allowed;
    }
#if !CONFIG_PVQ
    restore_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
    restore_context(x, &x_ctx, mi_row, mi_col, &pre_rdo_buf, bsize);
#endif
  }  // if (do_split)

  // PARTITION_HORZ
  if (partition_horz_allowed &&
      (do_rectangular_split || av1_active_h_edge(cpi, mi_row, mi_step))) {
    subsize = get_subsize(bsize, PARTITION_HORZ);
    if (cpi->sf.adaptive_motion_search) load_pred_mv(x, ctx_none);
#if CONFIG_DUAL_FILTER
    if (cpi->sf.adaptive_pred_interp_filter && bsize == BLOCK_8X8 &&
        partition_none_allowed)
      pc_tree->horizontal[0].pred_interp_filter =
          ctx_none->mic.mbmi.interp_filter[0];
#else
    if (cpi->sf.adaptive_pred_interp_filter && bsize == BLOCK_8X8 &&
        partition_none_allowed)
      pc_tree->horizontal[0].pred_interp_filter =
          ctx_none->mic.mbmi.interp_filter;
#endif
    rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col, &sum_rdc,
#if CONFIG_SUPERTX
                     &sum_rate_nocoef,
#endif  // CONFIG_SUPERTX
#if CONFIG_EXT_PARTITION_TYPES
                     PARTITION_HORZ,
#endif
                     subsize, &pc_tree->horizontal[0], best_rdc.rdcost);

#if CONFIG_SUPERTX
    abort_flag =
        (sum_rdc.rdcost >= best_rd && (bsize > BLOCK_8X8 || unify_bsize)) ||
        (sum_rdc.rate == INT_MAX && bsize == BLOCK_8X8);
    if (sum_rdc.rdcost < INT64_MAX &&
#else
    if (sum_rdc.rdcost < best_rdc.rdcost &&
#endif  // CONFIG_SUPERTX
        !force_horz_split && (bsize > BLOCK_8X8 || unify_bsize)) {
      PICK_MODE_CONTEXT *ctx_h = &pc_tree->horizontal[0];
      update_state(cpi, td, ctx_h, mi_row, mi_col, subsize, 1);
      encode_superblock(cpi, td, tp, DRY_RUN_NORMAL, mi_row, mi_col, subsize,
                        NULL);

      if (cpi->sf.adaptive_motion_search) load_pred_mv(x, ctx_h);

#if CONFIG_DUAL_FILTER
      if (cpi->sf.adaptive_pred_interp_filter && bsize == BLOCK_8X8 &&
          partition_none_allowed)
        pc_tree->horizontal[1].pred_interp_filter =
            ctx_h->mic.mbmi.interp_filter[0];
#else
      if (cpi->sf.adaptive_pred_interp_filter && bsize == BLOCK_8X8 &&
          partition_none_allowed)
        pc_tree->horizontal[1].pred_interp_filter =
            ctx_none->mic.mbmi.interp_filter;
#endif
#if CONFIG_SUPERTX
      rd_pick_sb_modes(cpi, tile_data, x, mi_row + mi_step, mi_col, &this_rdc,
                       &this_rate_nocoef,
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_HORZ,
#endif
                       subsize, &pc_tree->horizontal[1], INT64_MAX);
#else
      rd_pick_sb_modes(cpi, tile_data, x, mi_row + mi_step, mi_col, &this_rdc,
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_HORZ,
#endif
                       subsize, &pc_tree->horizontal[1],
                       best_rdc.rdcost - sum_rdc.rdcost);
#endif  // CONFIG_SUPERTX
      if (this_rdc.rate == INT_MAX) {
        sum_rdc.rdcost = INT64_MAX;
#if CONFIG_SUPERTX
        sum_rate_nocoef = INT_MAX;
#endif  // CONFIG_SUPERTX
      } else {
        sum_rdc.rate += this_rdc.rate;
        sum_rdc.dist += this_rdc.dist;
        sum_rdc.rdcost += this_rdc.rdcost;
#if CONFIG_SUPERTX
        sum_rate_nocoef += this_rate_nocoef;
#endif  // CONFIG_SUPERTX
      }
    }

#if CONFIG_SUPERTX
    if (supertx_allowed && sum_rdc.rdcost < INT64_MAX && !abort_flag) {
      TX_SIZE supertx_size = max_txsize_lookup[bsize];
      const PARTITION_TYPE best_partition = pc_tree->partitioning;

      pc_tree->partitioning = PARTITION_HORZ;

      sum_rdc.rate += av1_cost_bit(
          cm->fc->supertx_prob[partition_supertx_context_lookup[PARTITION_HORZ]]
                              [supertx_size],
          0);
      sum_rdc.rdcost = RDCOST(x->rdmult, x->rddiv, sum_rdc.rate, sum_rdc.dist);

      if (!check_intra_sb(cpi, tile_info, mi_row, mi_col, bsize, pc_tree)) {
        TX_TYPE best_tx = DCT_DCT;
        RD_STATS tmp_rdc;
        av1_init_rd_stats(&tmp_rdc);
        tmp_rdc.rate = sum_rate_nocoef;

        restore_context(x, &x_ctx, mi_row, mi_col, bsize);

        rd_supertx_sb(cpi, td, tile_info, mi_row, mi_col, bsize, &tmp_rdc.rate,
                      &tmp_rdc.dist, &best_tx, pc_tree);

        tmp_rdc.rate += av1_cost_bit(
            cm->fc
                ->supertx_prob[partition_supertx_context_lookup[PARTITION_HORZ]]
                              [supertx_size],
            1);
        tmp_rdc.rdcost =
            RDCOST(x->rdmult, x->rddiv, tmp_rdc.rate, tmp_rdc.dist);
        if (tmp_rdc.rdcost < sum_rdc.rdcost) {
          sum_rdc = tmp_rdc;
          update_supertx_param_sb(cpi, td, mi_row, mi_col, bsize, best_tx,
                                  supertx_size, pc_tree);
        }
      }

      pc_tree->partitioning = best_partition;
    }
#endif  // CONFIG_SUPERTX

    if (sum_rdc.rdcost < best_rdc.rdcost) {
      sum_rdc.rate += partition_cost[PARTITION_HORZ];
      sum_rdc.rdcost = RDCOST(x->rdmult, x->rddiv, sum_rdc.rate, sum_rdc.dist);
#if CONFIG_SUPERTX
      sum_rate_nocoef += partition_cost[PARTITION_HORZ];
#endif  // CONFIG_SUPERTX
      if (sum_rdc.rdcost < best_rdc.rdcost) {
        best_rdc = sum_rdc;
#if CONFIG_SUPERTX
        best_rate_nocoef = sum_rate_nocoef;
        assert(best_rate_nocoef >= 0);
#endif  // CONFIG_SUPERTX
        pc_tree->partitioning = PARTITION_HORZ;
      }
    }
#if !CONFIG_PVQ
    restore_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
    restore_context(x, &x_ctx, mi_row, mi_col, &pre_rdo_buf, bsize);
#endif
  }

  // PARTITION_VERT
  if (partition_vert_allowed &&
      (do_rectangular_split || av1_active_v_edge(cpi, mi_col, mi_step))) {
    subsize = get_subsize(bsize, PARTITION_VERT);

    if (cpi->sf.adaptive_motion_search) load_pred_mv(x, ctx_none);

#if CONFIG_DUAL_FILTER
    if (cpi->sf.adaptive_pred_interp_filter && bsize == BLOCK_8X8 &&
        partition_none_allowed)
      pc_tree->vertical[0].pred_interp_filter =
          ctx_none->mic.mbmi.interp_filter[0];
#else
    if (cpi->sf.adaptive_pred_interp_filter && bsize == BLOCK_8X8 &&
        partition_none_allowed)
      pc_tree->vertical[0].pred_interp_filter =
          ctx_none->mic.mbmi.interp_filter;
#endif
    rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col, &sum_rdc,
#if CONFIG_SUPERTX
                     &sum_rate_nocoef,
#endif  // CONFIG_SUPERTX
#if CONFIG_EXT_PARTITION_TYPES
                     PARTITION_VERT,
#endif
                     subsize, &pc_tree->vertical[0], best_rdc.rdcost);
#if CONFIG_SUPERTX
    abort_flag =
        (sum_rdc.rdcost >= best_rd && (bsize > BLOCK_8X8 || unify_bsize)) ||
        (sum_rdc.rate == INT_MAX && bsize == BLOCK_8X8);
    if (sum_rdc.rdcost < INT64_MAX &&
#else
    if (sum_rdc.rdcost < best_rdc.rdcost &&
#endif  // CONFIG_SUPERTX
        !force_vert_split && (bsize > BLOCK_8X8 || unify_bsize)) {
      update_state(cpi, td, &pc_tree->vertical[0], mi_row, mi_col, subsize, 1);
      encode_superblock(cpi, td, tp, DRY_RUN_NORMAL, mi_row, mi_col, subsize,
                        NULL);

      if (cpi->sf.adaptive_motion_search) load_pred_mv(x, ctx_none);

#if CONFIG_DUAL_FILTER
      if (cpi->sf.adaptive_pred_interp_filter && bsize == BLOCK_8X8 &&
          partition_none_allowed)
        pc_tree->vertical[1].pred_interp_filter =
            ctx_none->mic.mbmi.interp_filter[0];
#else
      if (cpi->sf.adaptive_pred_interp_filter && bsize == BLOCK_8X8 &&
          partition_none_allowed)
        pc_tree->vertical[1].pred_interp_filter =
            ctx_none->mic.mbmi.interp_filter;
#endif
#if CONFIG_SUPERTX
      rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col + mi_step, &this_rdc,
                       &this_rate_nocoef,
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_VERT,
#endif
                       subsize, &pc_tree->vertical[1],
                       INT64_MAX - sum_rdc.rdcost);
#else
      rd_pick_sb_modes(cpi, tile_data, x, mi_row, mi_col + mi_step, &this_rdc,
#if CONFIG_EXT_PARTITION_TYPES
                       PARTITION_VERT,
#endif
                       subsize, &pc_tree->vertical[1],
                       best_rdc.rdcost - sum_rdc.rdcost);
#endif  // CONFIG_SUPERTX
      if (this_rdc.rate == INT_MAX) {
        sum_rdc.rdcost = INT64_MAX;
#if CONFIG_SUPERTX
        sum_rate_nocoef = INT_MAX;
#endif  // CONFIG_SUPERTX
      } else {
        sum_rdc.rate += this_rdc.rate;
        sum_rdc.dist += this_rdc.dist;
        sum_rdc.rdcost += this_rdc.rdcost;
#if CONFIG_SUPERTX
        sum_rate_nocoef += this_rate_nocoef;
#endif  // CONFIG_SUPERTX
      }
    }
#if CONFIG_SUPERTX
    if (supertx_allowed && sum_rdc.rdcost < INT64_MAX && !abort_flag) {
      TX_SIZE supertx_size = max_txsize_lookup[bsize];
      const PARTITION_TYPE best_partition = pc_tree->partitioning;

      pc_tree->partitioning = PARTITION_VERT;

      sum_rdc.rate += av1_cost_bit(
          cm->fc->supertx_prob[partition_supertx_context_lookup[PARTITION_VERT]]
                              [supertx_size],
          0);
      sum_rdc.rdcost = RDCOST(x->rdmult, x->rddiv, sum_rdc.rate, sum_rdc.dist);

      if (!check_intra_sb(cpi, tile_info, mi_row, mi_col, bsize, pc_tree)) {
        TX_TYPE best_tx = DCT_DCT;
        RD_STATS tmp_rdc;
        av1_init_rd_stats(&tmp_rdc);
        tmp_rdc.rate = sum_rate_nocoef;

        restore_context(x, &x_ctx, mi_row, mi_col, bsize);

        rd_supertx_sb(cpi, td, tile_info, mi_row, mi_col, bsize, &tmp_rdc.rate,
                      &tmp_rdc.dist, &best_tx, pc_tree);

        tmp_rdc.rate += av1_cost_bit(
            cm->fc
                ->supertx_prob[partition_supertx_context_lookup[PARTITION_VERT]]
                              [supertx_size],
            1);
        tmp_rdc.rdcost =
            RDCOST(x->rdmult, x->rddiv, tmp_rdc.rate, tmp_rdc.dist);
        if (tmp_rdc.rdcost < sum_rdc.rdcost) {
          sum_rdc = tmp_rdc;
          update_supertx_param_sb(cpi, td, mi_row, mi_col, bsize, best_tx,
                                  supertx_size, pc_tree);
        }
      }

      pc_tree->partitioning = best_partition;
    }
#endif  // CONFIG_SUPERTX

    if (sum_rdc.rdcost < best_rdc.rdcost) {
      sum_rdc.rate += partition_cost[PARTITION_VERT];
      sum_rdc.rdcost = RDCOST(x->rdmult, x->rddiv, sum_rdc.rate, sum_rdc.dist);
#if CONFIG_SUPERTX
      sum_rate_nocoef += partition_cost[PARTITION_VERT];
#endif  // CONFIG_SUPERTX
      if (sum_rdc.rdcost < best_rdc.rdcost) {
        best_rdc = sum_rdc;
#if CONFIG_SUPERTX
        best_rate_nocoef = sum_rate_nocoef;
        assert(best_rate_nocoef >= 0);
#endif  // CONFIG_SUPERTX
        pc_tree->partitioning = PARTITION_VERT;
      }
    }
#if !CONFIG_PVQ
    restore_context(x, &x_ctx, mi_row, mi_col, bsize);
#else
    restore_context(x, &x_ctx, mi_row, mi_col, &pre_rdo_buf, bsize);
#endif
  }

#if CONFIG_EXT_PARTITION_TYPES
  // PARTITION_HORZ_A
  if (partition_horz_allowed && do_rectangular_split && bsize > BLOCK_8X8 &&
      partition_none_allowed) {
    subsize = get_subsize(bsize, PARTITION_HORZ_A);
    rd_test_partition3(cpi, td, tile_data, tp, pc_tree, &best_rdc,
                       pc_tree->horizontala, ctx_none, mi_row, mi_col, bsize,
                       PARTITION_HORZ_A,
#if CONFIG_SUPERTX
                       best_rd, &best_rate_nocoef, &x_ctx,
#endif
                       mi_row, mi_col, bsize2, mi_row, mi_col + mi_step, bsize2,
                       mi_row + mi_step, mi_col, subsize);
    restore_context(x, &x_ctx, mi_row, mi_col, bsize);
  }
  // PARTITION_HORZ_B
  if (partition_horz_allowed && do_rectangular_split && bsize > BLOCK_8X8 &&
      partition_none_allowed) {
    subsize = get_subsize(bsize, PARTITION_HORZ_B);
    rd_test_partition3(cpi, td, tile_data, tp, pc_tree, &best_rdc,
                       pc_tree->horizontalb, ctx_none, mi_row, mi_col, bsize,
                       PARTITION_HORZ_B,
#if CONFIG_SUPERTX
                       best_rd, &best_rate_nocoef, &x_ctx,
#endif
                       mi_row, mi_col, subsize, mi_row + mi_step, mi_col,
                       bsize2, mi_row + mi_step, mi_col + mi_step, bsize2);
    restore_context(x, &x_ctx, mi_row, mi_col, bsize);
  }
  // PARTITION_VERT_A
  if (partition_vert_allowed && do_rectangular_split && bsize > BLOCK_8X8 &&
      partition_none_allowed) {
    subsize = get_subsize(bsize, PARTITION_VERT_A);
    rd_test_partition3(cpi, td, tile_data, tp, pc_tree, &best_rdc,
                       pc_tree->verticala, ctx_none, mi_row, mi_col, bsize,
                       PARTITION_VERT_A,
#if CONFIG_SUPERTX
                       best_rd, &best_rate_nocoef, &x_ctx,
#endif
                       mi_row, mi_col, bsize2, mi_row + mi_step, mi_col, bsize2,
                       mi_row, mi_col + mi_step, subsize);
    restore_context(x, &x_ctx, mi_row, mi_col, bsize);
  }
  // PARTITION_VERT_B
  if (partition_vert_allowed && do_rectangular_split && bsize > BLOCK_8X8 &&
      partition_none_allowed) {
    subsize = get_subsize(bsize, PARTITION_VERT_B);
    rd_test_partition3(cpi, td, tile_data, tp, pc_tree, &best_rdc,
                       pc_tree->verticalb, ctx_none, mi_row, mi_col, bsize,
                       PARTITION_VERT_B,
#if CONFIG_SUPERTX
                       best_rd, &best_rate_nocoef, &x_ctx,
#endif
                       mi_row, mi_col, subsize, mi_row, mi_col + mi_step,
                       bsize2, mi_row + mi_step, mi_col + mi_step, bsize2);
    restore_context(x, &x_ctx, mi_row, mi_col, bsize);
  }
#endif  // CONFIG_EXT_PARTITION_TYPES

  // TODO(jbb): This code added so that we avoid static analysis
  // warning related to the fact that best_rd isn't used after this
  // point.  This code should be refactored so that the duplicate
  // checks occur in some sub function and thus are used...
  (void)best_rd;
  *rd_cost = best_rdc;
#if CONFIG_SUPERTX
  *rate_nocoef = best_rate_nocoef;
#endif  // CONFIG_SUPERTX

#if CONFIG_CFL
  // Store the luma for the best mode
  x->cfl_store_y = 1;
#endif
  if (best_rdc.rate < INT_MAX && best_rdc.dist < INT64_MAX &&
      pc_tree->index != 3) {
    if (bsize == cm->sb_size) {
#if CONFIG_MOTION_VAR && CONFIG_NCOBMC
      set_mode_info_sb(cpi, td, tile_info, tp, mi_row, mi_col, bsize, pc_tree);
#endif
      encode_sb(cpi, td, tile_info, tp, mi_row, mi_col, OUTPUT_ENABLED, bsize,
                pc_tree, NULL);
    } else {
      encode_sb(cpi, td, tile_info, tp, mi_row, mi_col, DRY_RUN_NORMAL, bsize,
                pc_tree, NULL);
    }
  }
#if CONFIG_CFL
  x->cfl_store_y = 0;
#endif

  if (bsize == cm->sb_size) {
#if !CONFIG_PVQ && !CONFIG_LV_MAP
    assert(tp_orig < *tp || (tp_orig == *tp && xd->mi[0]->mbmi.skip));
#endif
    assert(best_rdc.rate < INT_MAX);
    assert(best_rdc.dist < INT64_MAX);
  } else {
    assert(tp_orig == *tp);
  }
}

static void encode_rd_sb_row(AV1_COMP *cpi, ThreadData *td,
                             TileDataEnc *tile_data, int mi_row,
                             TOKENEXTRA **tp) {
  AV1_COMMON *const cm = &cpi->common;
  const TileInfo *const tile_info = &tile_data->tile_info;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  SPEED_FEATURES *const sf = &cpi->sf;
  int mi_col;
#if CONFIG_EXT_PARTITION
  const int leaf_nodes = 256;
#else
  const int leaf_nodes = 64;
#endif  // CONFIG_EXT_PARTITION

  // Initialize the left context for the new SB row
  av1_zero_left_context(xd);

#if CONFIG_DELTA_Q
  // Reset delta for every tile
  if (cm->delta_q_present_flag)
    if (mi_row == tile_info->mi_row_start) xd->prev_qindex = cm->base_qindex;
#if CONFIG_EXT_DELTA_Q
  if (cm->delta_lf_present_flag)
    if (mi_row == tile_info->mi_row_start) xd->prev_delta_lf_from_base = 0;
#endif
#endif

  // Code each SB in the row
  for (mi_col = tile_info->mi_col_start; mi_col < tile_info->mi_col_end;
       mi_col += cm->mib_size) {
    const struct segmentation *const seg = &cm->seg;
    int dummy_rate;
    int64_t dummy_dist;
    RD_STATS dummy_rdc;
#if CONFIG_SUPERTX
    int dummy_rate_nocoef;
#endif  // CONFIG_SUPERTX
    int i;
    int seg_skip = 0;

    const int idx_str = cm->mi_stride * mi_row + mi_col;
    MODE_INFO **mi = cm->mi_grid_visible + idx_str;
    PC_TREE *const pc_root = td->pc_root[cm->mib_size_log2 - MIN_MIB_SIZE_LOG2];

    av1_update_boundary_info(cm, tile_info, mi_row, mi_col);

    if (sf->adaptive_pred_interp_filter) {
      for (i = 0; i < leaf_nodes; ++i)
        td->leaf_tree[i].pred_interp_filter = SWITCHABLE;

      for (i = 0; i < leaf_nodes; ++i) {
        td->pc_tree[i].vertical[0].pred_interp_filter = SWITCHABLE;
        td->pc_tree[i].vertical[1].pred_interp_filter = SWITCHABLE;
        td->pc_tree[i].horizontal[0].pred_interp_filter = SWITCHABLE;
        td->pc_tree[i].horizontal[1].pred_interp_filter = SWITCHABLE;
      }
    }

    av1_zero(x->pred_mv);
    pc_root->index = 0;

    if (seg->enabled) {
      const uint8_t *const map =
          seg->update_map ? cpi->segmentation_map : cm->last_frame_seg_map;
      int segment_id = get_segment_id(cm, map, cm->sb_size, mi_row, mi_col);
      seg_skip = segfeature_active(seg, segment_id, SEG_LVL_SKIP);
    }

#if CONFIG_DELTA_Q
    if (cm->delta_q_present_flag) {
      // Test mode for delta quantization
      int sb_row = mi_row >> 3;
      int sb_col = mi_col >> 3;
      int sb_stride = (cm->width + MAX_SB_SIZE - 1) >> MAX_SB_SIZE_LOG2;
      int index = ((sb_row * sb_stride + sb_col + 8) & 31) - 16;

      // Ensure divisibility of delta_qindex by delta_q_res
      int offset_qindex = (index < 0 ? -index - 8 : index - 8);
      int qmask = ~(cm->delta_q_res - 1);
      int current_qindex = clamp(cm->base_qindex + offset_qindex,
                                 cm->delta_q_res, 256 - cm->delta_q_res);

      current_qindex =
          ((current_qindex - cm->base_qindex + cm->delta_q_res / 2) & qmask) +
          cm->base_qindex;
      assert(current_qindex > 0);

      xd->delta_qindex = current_qindex - cm->base_qindex;
      set_offsets(cpi, tile_info, x, mi_row, mi_col, BLOCK_64X64);
      xd->mi[0]->mbmi.current_q_index = current_qindex;
#if !CONFIG_EXT_DELTA_Q
      xd->mi[0]->mbmi.segment_id = 0;
#endif  // CONFIG_EXT_DELTA_Q
      av1_init_plane_quantizers(cpi, x, xd->mi[0]->mbmi.segment_id);
#if CONFIG_EXT_DELTA_Q
      if (cpi->oxcf.deltaq_mode == DELTA_Q_LF) {
        int j, k;
        int lfmask = ~(cm->delta_lf_res - 1);
        int current_delta_lf_from_base = offset_qindex / 2;
        current_delta_lf_from_base =
            ((current_delta_lf_from_base + cm->delta_lf_res / 2) & lfmask);

        // pre-set the delta lf for loop filter. Note that this value is set
        // before mi is assigned for each block in current superblock
        for (j = 0; j < AOMMIN(cm->mib_size, cm->mi_rows - mi_row); j++) {
          for (k = 0; k < AOMMIN(cm->mib_size, cm->mi_cols - mi_col); k++) {
            cm->mi[(mi_row + j) * cm->mi_stride + (mi_col + k)]
                .mbmi.current_delta_lf_from_base = current_delta_lf_from_base;
          }
        }
      }
#endif  // CONFIG_EXT_DELTA_Q
    }
#endif  // CONFIG_DELTA_Q

    x->source_variance = UINT_MAX;
    if (sf->partition_search_type == FIXED_PARTITION || seg_skip) {
      BLOCK_SIZE bsize;
      set_offsets(cpi, tile_info, x, mi_row, mi_col, cm->sb_size);
      bsize = seg_skip ? cm->sb_size : sf->always_this_block_size;
      set_fixed_partitioning(cpi, tile_info, mi, mi_row, mi_col, bsize);
      rd_use_partition(cpi, td, tile_data, mi, tp, mi_row, mi_col, cm->sb_size,
                       &dummy_rate, &dummy_dist,
#if CONFIG_SUPERTX
                       &dummy_rate_nocoef,
#endif  // CONFIG_SUPERTX
                       1, pc_root);
    } else if (cpi->partition_search_skippable_frame) {
      BLOCK_SIZE bsize;
      set_offsets(cpi, tile_info, x, mi_row, mi_col, cm->sb_size);
      bsize = get_rd_var_based_fixed_partition(cpi, x, mi_row, mi_col);
      set_fixed_partitioning(cpi, tile_info, mi, mi_row, mi_col, bsize);
      rd_use_partition(cpi, td, tile_data, mi, tp, mi_row, mi_col, cm->sb_size,
                       &dummy_rate, &dummy_dist,
#if CONFIG_SUPERTX
                       &dummy_rate_nocoef,
#endif  // CONFIG_SUPERTX
                       1, pc_root);
    } else if (sf->partition_search_type == VAR_BASED_PARTITION) {
      choose_partitioning(cpi, td, tile_info, x, mi_row, mi_col);
      rd_use_partition(cpi, td, tile_data, mi, tp, mi_row, mi_col, cm->sb_size,
                       &dummy_rate, &dummy_dist,
#if CONFIG_SUPERTX
                       &dummy_rate_nocoef,
#endif  // CONFIG_SUPERTX
                       1, pc_root);
    } else {
      // If required set upper and lower partition size limits
      if (sf->auto_min_max_partition_size) {
        set_offsets(cpi, tile_info, x, mi_row, mi_col, cm->sb_size);
        rd_auto_partition_range(cpi, tile_info, xd, mi_row, mi_col,
                                &x->min_partition_size, &x->max_partition_size);
      }
      rd_pick_partition(cpi, td, tile_data, tp, mi_row, mi_col, cm->sb_size,
                        &dummy_rdc,
#if CONFIG_SUPERTX
                        &dummy_rate_nocoef,
#endif  // CONFIG_SUPERTX
                        INT64_MAX, pc_root);
    }
  }
}

static void init_encode_frame_mb_context(AV1_COMP *cpi) {
  MACROBLOCK *const x = &cpi->td.mb;
  AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;

  // Copy data over into macro block data structures.
  av1_setup_src_planes(x, cpi->source, 0, 0);

  av1_setup_block_planes(xd, cm->subsampling_x, cm->subsampling_y);
}

#if !CONFIG_REF_ADAPT
static int check_dual_ref_flags(AV1_COMP *cpi) {
  const int ref_flags = cpi->ref_frame_flags;

  if (segfeature_active(&cpi->common.seg, 1, SEG_LVL_REF_FRAME)) {
    return 0;
  } else {
    return (!!(ref_flags & AOM_GOLD_FLAG) + !!(ref_flags & AOM_LAST_FLAG) +
#if CONFIG_EXT_REFS
            !!(ref_flags & AOM_LAST2_FLAG) + !!(ref_flags & AOM_LAST3_FLAG) +
            !!(ref_flags & AOM_BWD_FLAG) +
#endif  // CONFIG_EXT_REFS
            !!(ref_flags & AOM_ALT_FLAG)) >= 2;
  }
}
#endif  // !CONFIG_REF_ADAPT

#if !CONFIG_VAR_TX
static void reset_skip_tx_size(AV1_COMMON *cm, TX_SIZE max_tx_size) {
  int mi_row, mi_col;
  const int mis = cm->mi_stride;
  MODE_INFO **mi_ptr = cm->mi_grid_visible;

  for (mi_row = 0; mi_row < cm->mi_rows; ++mi_row, mi_ptr += mis) {
    for (mi_col = 0; mi_col < cm->mi_cols; ++mi_col) {
      if (txsize_sqr_up_map[mi_ptr[mi_col]->mbmi.tx_size] > max_tx_size)
        mi_ptr[mi_col]->mbmi.tx_size = max_tx_size;
    }
  }
}
#endif

static MV_REFERENCE_FRAME get_frame_type(const AV1_COMP *cpi) {
  if (frame_is_intra_only(&cpi->common)) return INTRA_FRAME;
#if CONFIG_EXT_REFS
  // We will not update the golden frame with an internal overlay frame
  else if ((cpi->rc.is_src_frame_alt_ref && cpi->refresh_golden_frame) ||
           cpi->rc.is_src_frame_ext_arf)
#else
  else if (cpi->rc.is_src_frame_alt_ref && cpi->refresh_golden_frame)
#endif
    return ALTREF_FRAME;
  else if (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame)
    return GOLDEN_FRAME;
  else
    // TODO(zoeliu): To investigate whether a frame_type other than
    // INTRA/ALTREF/GOLDEN/LAST needs to be specified seperately.
    return LAST_FRAME;
}

static TX_MODE select_tx_mode(const AV1_COMP *cpi, MACROBLOCKD *const xd) {
  int i, all_lossless = 1;

  if (cpi->common.seg.enabled) {
    for (i = 0; i < MAX_SEGMENTS; ++i) {
      if (!xd->lossless[i]) {
        all_lossless = 0;
        break;
      }
    }
  } else {
    all_lossless = xd->lossless[0];
  }
  if (all_lossless) return ONLY_4X4;
  if (cpi->sf.tx_size_search_method == USE_LARGESTALL)
    return ALLOW_32X32 + CONFIG_TX64X64;
  else if (cpi->sf.tx_size_search_method == USE_FULL_RD ||
           cpi->sf.tx_size_search_method == USE_TX_8X8)
    return TX_MODE_SELECT;
  else
    return cpi->common.tx_mode;
}

void av1_init_tile_data(AV1_COMP *cpi) {
  AV1_COMMON *const cm = &cpi->common;
  const int tile_cols = cm->tile_cols;
  const int tile_rows = cm->tile_rows;
  int tile_col, tile_row;
  TOKENEXTRA *pre_tok = cpi->tile_tok[0][0];
  unsigned int tile_tok = 0;

  if (cpi->tile_data == NULL || cpi->allocated_tiles < tile_cols * tile_rows) {
    if (cpi->tile_data != NULL) aom_free(cpi->tile_data);
    CHECK_MEM_ERROR(
        cm, cpi->tile_data,
        aom_memalign(32, tile_cols * tile_rows * sizeof(*cpi->tile_data)));
    cpi->allocated_tiles = tile_cols * tile_rows;

    for (tile_row = 0; tile_row < tile_rows; ++tile_row)
      for (tile_col = 0; tile_col < tile_cols; ++tile_col) {
        TileDataEnc *const tile_data =
            &cpi->tile_data[tile_row * tile_cols + tile_col];
        int i, j;
        for (i = 0; i < BLOCK_SIZES; ++i) {
          for (j = 0; j < MAX_MODES; ++j) {
            tile_data->thresh_freq_fact[i][j] = 32;
            tile_data->mode_map[i][j] = j;
          }
        }
#if CONFIG_PVQ
        // This will be dynamically increased as more pvq block is encoded.
        tile_data->pvq_q.buf_len = 1000;
        CHECK_MEM_ERROR(
            cm, tile_data->pvq_q.buf,
            aom_malloc(tile_data->pvq_q.buf_len * sizeof(PVQ_INFO)));
        tile_data->pvq_q.curr_pos = 0;
#endif
      }
  }

  for (tile_row = 0; tile_row < tile_rows; ++tile_row) {
    for (tile_col = 0; tile_col < tile_cols; ++tile_col) {
      TileInfo *const tile_info =
          &cpi->tile_data[tile_row * tile_cols + tile_col].tile_info;
      av1_tile_init(tile_info, cm, tile_row, tile_col);

      cpi->tile_tok[tile_row][tile_col] = pre_tok + tile_tok;
      pre_tok = cpi->tile_tok[tile_row][tile_col];
      tile_tok = allocated_tokens(*tile_info);
#if CONFIG_PVQ
      cpi->tile_data[tile_row * tile_cols + tile_col].pvq_q.curr_pos = 0;
#endif
    }
  }
}

void av1_encode_tile(AV1_COMP *cpi, ThreadData *td, int tile_row,
                     int tile_col) {
  AV1_COMMON *const cm = &cpi->common;
  TileDataEnc *const this_tile =
      &cpi->tile_data[tile_row * cm->tile_cols + tile_col];
  const TileInfo *const tile_info = &this_tile->tile_info;
  TOKENEXTRA *tok = cpi->tile_tok[tile_row][tile_col];
  int mi_row;

#if CONFIG_DEPENDENT_HORZTILES
#if CONFIG_TILE_GROUPS
  if ((!cm->dependent_horz_tiles) || (tile_row == 0) ||
      tile_info->tg_horz_boundary) {
#else
  if ((!cm->dependent_horz_tiles) || (tile_row == 0)) {
#endif
    av1_zero_above_context(cm, tile_info->mi_col_start, tile_info->mi_col_end);
  }
#else
  av1_zero_above_context(cm, tile_info->mi_col_start, tile_info->mi_col_end);
#endif

  // Set up pointers to per thread motion search counters.
  this_tile->m_search_count = 0;   // Count of motion search hits.
  this_tile->ex_search_count = 0;  // Exhaustive mesh search hits.
  td->mb.m_search_count_ptr = &this_tile->m_search_count;
  td->mb.ex_search_count_ptr = &this_tile->ex_search_count;

#if CONFIG_PVQ
  td->mb.pvq_q = &this_tile->pvq_q;

  // TODO(yushin) : activity masking info needs be signaled by a bitstream
  td->mb.daala_enc.use_activity_masking = AV1_PVQ_ENABLE_ACTIVITY_MASKING;

  if (td->mb.daala_enc.use_activity_masking)
    td->mb.daala_enc.qm = OD_HVS_QM;  // Hard coded. Enc/dec required to sync.
  else
    td->mb.daala_enc.qm = OD_FLAT_QM;  // Hard coded. Enc/dec required to sync.

  {
    // FIXME: Multiple segments support
    int segment_id = 0;
    int rdmult = set_segment_rdmult(cpi, &td->mb, segment_id);
    int qindex = av1_get_qindex(&cm->seg, segment_id, cm->base_qindex);
#if CONFIG_HIGHBITDEPTH
    const int quantizer_shift = td->mb.e_mbd.bd - 8;
#else
    const int quantizer_shift = 0;
#endif  // CONFIG_HIGHBITDEPTH
    int64_t q_ac = OD_MAXI(
        1, av1_ac_quant(qindex, 0, cpi->common.bit_depth) >> quantizer_shift);
    int64_t q_dc = OD_MAXI(
        1, av1_dc_quant(qindex, 0, cpi->common.bit_depth) >> quantizer_shift);
    /* td->mb.daala_enc.pvq_norm_lambda = OD_PVQ_LAMBDA; */
    td->mb.daala_enc.pvq_norm_lambda =
        (double)rdmult * (64 / 16) / (q_ac * q_ac * (1 << RDDIV_BITS));
    td->mb.daala_enc.pvq_norm_lambda_dc =
        (double)rdmult * (64 / 16) / (q_dc * q_dc * (1 << RDDIV_BITS));
    // printf("%f\n", td->mb.daala_enc.pvq_norm_lambda);
  }
  od_init_qm(td->mb.daala_enc.state.qm, td->mb.daala_enc.state.qm_inv,
             td->mb.daala_enc.qm == OD_HVS_QM ? OD_QM8_Q4_HVS : OD_QM8_Q4_FLAT);

  if (td->mb.daala_enc.use_activity_masking) {
    int pli;
    int use_masking = td->mb.daala_enc.use_activity_masking;
    int segment_id = 0;
    int qindex = av1_get_qindex(&cm->seg, segment_id, cm->base_qindex);

    for (pli = 0; pli < MAX_MB_PLANE; pli++) {
      int i;
      int q;

      q = qindex;
      if (q <= OD_DEFAULT_QMS[use_masking][0][pli].interp_q << OD_COEFF_SHIFT) {
        od_interp_qm(&td->mb.daala_enc.state.pvq_qm_q4[pli][0], q,
                     &OD_DEFAULT_QMS[use_masking][0][pli], NULL);
      } else {
        i = 0;
        while (OD_DEFAULT_QMS[use_masking][i + 1][pli].qm_q4 != NULL &&
               q > OD_DEFAULT_QMS[use_masking][i + 1][pli].interp_q
                       << OD_COEFF_SHIFT) {
          i++;
        }
        od_interp_qm(&td->mb.daala_enc.state.pvq_qm_q4[pli][0], q,
                     &OD_DEFAULT_QMS[use_masking][i][pli],
                     &OD_DEFAULT_QMS[use_masking][i + 1][pli]);
      }
    }
  }

#if CONFIG_DAALA_EC
  od_ec_enc_init(&td->mb.daala_enc.w.ec, 65025);
#else
#error "CONFIG_PVQ currently requires CONFIG_DAALA_EC."
#endif

#if CONFIG_DAALA_EC
  od_ec_enc_reset(&td->mb.daala_enc.w.ec);
#else
#error "CONFIG_PVQ currently requires CONFIG_DAALA_EC."
#endif
#endif  // #if CONFIG_PVQ

#if CONFIG_EC_ADAPT
  this_tile->tctx = *cm->fc;
  td->mb.e_mbd.tile_ctx = &this_tile->tctx;
#endif  // #if CONFIG_EC_ADAPT

#if CONFIG_CFL
  MACROBLOCKD *const xd = &td->mb.e_mbd;
  xd->cfl = &this_tile->cfl;
  cfl_init(xd->cfl, cm, xd->plane[AOM_PLANE_U].subsampling_x,
           xd->plane[AOM_PLANE_U].subsampling_y);
#endif

#if CONFIG_PVQ
  td->mb.daala_enc.state.adapt = &this_tile->tctx.pvq_context;
#endif  // CONFIG_PVQ

  for (mi_row = tile_info->mi_row_start; mi_row < tile_info->mi_row_end;
       mi_row += cm->mib_size) {
    encode_rd_sb_row(cpi, td, this_tile, mi_row, &tok);
  }

  cpi->tok_count[tile_row][tile_col] =
      (unsigned int)(tok - cpi->tile_tok[tile_row][tile_col]);
  assert(cpi->tok_count[tile_row][tile_col] <= allocated_tokens(*tile_info));
#if CONFIG_PVQ
#if CONFIG_DAALA_EC
  od_ec_enc_clear(&td->mb.daala_enc.w.ec);
#else
#error "CONFIG_PVQ currently requires CONFIG_DAALA_EC."
#endif

  td->mb.pvq_q->last_pos = td->mb.pvq_q->curr_pos;
  // rewind current position so that bitstream can be written
  // from the 1st pvq block
  td->mb.pvq_q->curr_pos = 0;

  td->mb.pvq_q = NULL;
#endif
}

static void encode_tiles(AV1_COMP *cpi) {
  AV1_COMMON *const cm = &cpi->common;
  int tile_col, tile_row;

  av1_init_tile_data(cpi);

  for (tile_row = 0; tile_row < cm->tile_rows; ++tile_row)
    for (tile_col = 0; tile_col < cm->tile_cols; ++tile_col)
      av1_encode_tile(cpi, &cpi->td, tile_row, tile_col);
}

#if CONFIG_FP_MB_STATS
static int input_fpmb_stats(FIRSTPASS_MB_STATS *firstpass_mb_stats,
                            AV1_COMMON *cm, uint8_t **this_frame_mb_stats) {
  uint8_t *mb_stats_in = firstpass_mb_stats->mb_stats_start +
                         cm->current_video_frame * cm->MBs * sizeof(uint8_t);

  if (mb_stats_in > firstpass_mb_stats->mb_stats_end) return EOF;

  *this_frame_mb_stats = mb_stats_in;

  return 1;
}
#endif

#if CONFIG_GLOBAL_MOTION
#define GLOBAL_TRANS_TYPES_ENC 3  // highest motion model to search
static int gm_get_params_cost(WarpedMotionParams *gm,
                              WarpedMotionParams *ref_gm, int allow_hp) {
  assert(gm->wmtype < GLOBAL_TRANS_TYPES);
  int params_cost = 0;
  int trans_bits, trans_prec_diff;
  switch (gm->wmtype) {
    case HOMOGRAPHY:
    case HORTRAPEZOID:
    case VERTRAPEZOID:
      if (gm->wmtype != HORTRAPEZOID)
        params_cost += aom_count_signed_primitive_refsubexpfin(
            GM_ROW3HOMO_MAX + 1, SUBEXPFIN_K,
            (ref_gm->wmmat[6] >> GM_ROW3HOMO_PREC_DIFF),
            (gm->wmmat[6] >> GM_ROW3HOMO_PREC_DIFF));
      if (gm->wmtype != VERTRAPEZOID)
        params_cost += aom_count_signed_primitive_refsubexpfin(
            GM_ROW3HOMO_MAX + 1, SUBEXPFIN_K,
            (ref_gm->wmmat[7] >> GM_ROW3HOMO_PREC_DIFF),
            (gm->wmmat[7] >> GM_ROW3HOMO_PREC_DIFF));
    // Fallthrough intended
    case AFFINE:
    case ROTZOOM:
      params_cost += aom_count_signed_primitive_refsubexpfin(
          GM_ALPHA_MAX + 1, SUBEXPFIN_K,
          (ref_gm->wmmat[2] >> GM_ALPHA_PREC_DIFF) - (1 << GM_ALPHA_PREC_BITS),
          (gm->wmmat[2] >> GM_ALPHA_PREC_DIFF) - (1 << GM_ALPHA_PREC_BITS));
      if (gm->wmtype != VERTRAPEZOID)
        params_cost += aom_count_signed_primitive_refsubexpfin(
            GM_ALPHA_MAX + 1, SUBEXPFIN_K,
            (ref_gm->wmmat[3] >> GM_ALPHA_PREC_DIFF),
            (gm->wmmat[3] >> GM_ALPHA_PREC_DIFF));
      if (gm->wmtype >= AFFINE) {
        if (gm->wmtype != HORTRAPEZOID)
          params_cost += aom_count_signed_primitive_refsubexpfin(
              GM_ALPHA_MAX + 1, SUBEXPFIN_K,
              (ref_gm->wmmat[4] >> GM_ALPHA_PREC_DIFF),
              (gm->wmmat[4] >> GM_ALPHA_PREC_DIFF));
        params_cost += aom_count_signed_primitive_refsubexpfin(
            GM_ALPHA_MAX + 1, SUBEXPFIN_K,
            (ref_gm->wmmat[5] >> GM_ALPHA_PREC_DIFF) -
                (1 << GM_ALPHA_PREC_BITS),
            (gm->wmmat[5] >> GM_ALPHA_PREC_DIFF) - (1 << GM_ALPHA_PREC_BITS));
      }
    // Fallthrough intended
    case TRANSLATION:
      trans_bits = (gm->wmtype == TRANSLATION)
                       ? GM_ABS_TRANS_ONLY_BITS - !allow_hp
                       : GM_ABS_TRANS_BITS;
      trans_prec_diff = (gm->wmtype == TRANSLATION)
                            ? GM_TRANS_ONLY_PREC_DIFF + !allow_hp
                            : GM_TRANS_PREC_DIFF;
      params_cost += aom_count_signed_primitive_refsubexpfin(
          (1 << trans_bits) + 1, SUBEXPFIN_K,
          (ref_gm->wmmat[0] >> trans_prec_diff),
          (gm->wmmat[0] >> trans_prec_diff));
      params_cost += aom_count_signed_primitive_refsubexpfin(
          (1 << trans_bits) + 1, SUBEXPFIN_K,
          (ref_gm->wmmat[1] >> trans_prec_diff),
          (gm->wmmat[1] >> trans_prec_diff));
    // Fallthrough intended
    case IDENTITY: break;
    default: assert(0);
  }
  return (params_cost << AV1_PROB_COST_SHIFT);
}

static int do_gm_search_logic(SPEED_FEATURES *const sf, int num_refs_using_gm,
                              int frame) {
  (void)num_refs_using_gm;
  (void)frame;
  switch (sf->gm_search_type) {
    case GM_FULL_SEARCH: return 1;
    case GM_REDUCED_REF_SEARCH:
#if CONFIG_EXT_REFS
      return !(frame == LAST2_FRAME || frame == LAST3_FRAME);
#else
      return (num_refs_using_gm < 2);
#endif  // CONFIG_EXT_REFS
    case GM_DISABLE_SEARCH: return 0;
    default: assert(0);
  }
  return 1;
}
#endif  // CONFIG_GLOBAL_MOTION

static void encode_frame_internal(AV1_COMP *cpi) {
  ThreadData *const td = &cpi->td;
  MACROBLOCK *const x = &td->mb;
  AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  RD_COUNTS *const rdc = &cpi->td.rd_counts;
  int i;
#if CONFIG_TEMPMV_SIGNALING || CONFIG_EXT_REFS
  const int last_fb_buf_idx = get_ref_frame_buf_idx(cpi, LAST_FRAME);
#endif  // CONFIG_TEMPMV_SIGNALING || CONFIG_EXT_REFS

#if CONFIG_ADAPT_SCAN
  av1_deliver_eob_threshold(cm, xd);
#endif

  x->min_partition_size = AOMMIN(x->min_partition_size, cm->sb_size);
  x->max_partition_size = AOMMIN(x->max_partition_size, cm->sb_size);
  cm->setup_mi(cm);

  xd->mi = cm->mi_grid_visible;
  xd->mi[0] = cm->mi;

  av1_zero(*td->counts);
  av1_zero(rdc->coef_counts);
  av1_zero(rdc->comp_pred_diff);

#if CONFIG_GLOBAL_MOTION
  av1_zero(rdc->global_motion_used);
  av1_zero(cpi->gmparams_cost);
  if (cpi->common.frame_type == INTER_FRAME && cpi->source &&
      !cpi->global_motion_search_done) {
    YV12_BUFFER_CONFIG *ref_buf[TOTAL_REFS_PER_FRAME];
    int frame;
    double params_by_motion[RANSAC_NUM_MOTIONS * (MAX_PARAMDIM - 1)];
    const double *params_this_motion;
    int inliers_by_motion[RANSAC_NUM_MOTIONS];
    WarpedMotionParams tmp_wm_params;
    static const double kInfiniteErrAdv = 1e12;
    static const double kIdentityParams[MAX_PARAMDIM - 1] = {
      0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0
    };
    int num_refs_using_gm = 0;

    for (frame = LAST_FRAME; frame <= ALTREF_FRAME; ++frame) {
      ref_buf[frame] = get_ref_frame_buffer(cpi, frame);
      int pframe;
      // check for duplicate buffer
      for (pframe = LAST_FRAME; pframe < frame; ++pframe) {
        if (ref_buf[frame] == ref_buf[pframe]) break;
      }
      if (pframe < frame) {
        memcpy(&cm->global_motion[frame], &cm->global_motion[pframe],
               sizeof(WarpedMotionParams));
      } else if (ref_buf[frame] &&
                 do_gm_search_logic(&cpi->sf, num_refs_using_gm, frame)) {
        TransformationType model;
        aom_clear_system_state();
        for (model = ROTZOOM; model < GLOBAL_TRANS_TYPES_ENC; ++model) {
          double best_erroradvantage = kInfiniteErrAdv;

          // Initially set all params to identity.
          for (i = 0; i < RANSAC_NUM_MOTIONS; ++i) {
            memcpy(params_by_motion + (MAX_PARAMDIM - 1) * i, kIdentityParams,
                   (MAX_PARAMDIM - 1) * sizeof(*params_by_motion));
          }

          compute_global_motion_feature_based(
              model, cpi->source, ref_buf[frame],
#if CONFIG_HIGHBITDEPTH
              cpi->common.bit_depth,
#endif  // CONFIG_HIGHBITDEPTH
              inliers_by_motion, params_by_motion, RANSAC_NUM_MOTIONS);

          for (i = 0; i < RANSAC_NUM_MOTIONS; ++i) {
            if (inliers_by_motion[i] == 0) continue;

            params_this_motion = params_by_motion + (MAX_PARAMDIM - 1) * i;
            convert_model_to_params(params_this_motion, &tmp_wm_params);

            if (tmp_wm_params.wmtype != IDENTITY) {
              const double erroradv_this_motion = refine_integerized_param(
                  &tmp_wm_params, tmp_wm_params.wmtype,
#if CONFIG_HIGHBITDEPTH
                  xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH, xd->bd,
#endif  // CONFIG_HIGHBITDEPTH
                  ref_buf[frame]->y_buffer, ref_buf[frame]->y_width,
                  ref_buf[frame]->y_height, ref_buf[frame]->y_stride,
                  cpi->source->y_buffer, cpi->source->y_width,
                  cpi->source->y_height, cpi->source->y_stride, 3);
              if (erroradv_this_motion < best_erroradvantage) {
                best_erroradvantage = erroradv_this_motion;
                // Save the wm_params modified by refine_integerized_param()
                // rather than motion index to avoid rerunning refine() below.
                memcpy(&(cm->global_motion[frame]), &tmp_wm_params,
                       sizeof(WarpedMotionParams));
              }
            }
          }
          if (cm->global_motion[frame].wmtype <= AFFINE)
            if (!get_shear_params(&cm->global_motion[frame]))
              set_default_warp_params(&cm->global_motion[frame]);

          if (cm->global_motion[frame].wmtype == TRANSLATION) {
            cm->global_motion[frame].wmmat[0] =
                convert_to_trans_prec(cm->allow_high_precision_mv,
                                      cm->global_motion[frame].wmmat[0]) *
                GM_TRANS_ONLY_DECODE_FACTOR;
            cm->global_motion[frame].wmmat[1] =
                convert_to_trans_prec(cm->allow_high_precision_mv,
                                      cm->global_motion[frame].wmmat[1]) *
                GM_TRANS_ONLY_DECODE_FACTOR;
          }

          // If the best error advantage found doesn't meet the threshold for
          // this motion type, revert to IDENTITY.
          if (!is_enough_erroradvantage(
                  best_erroradvantage,
                  gm_get_params_cost(&cm->global_motion[frame],
                                     &cm->prev_frame->global_motion[frame],
                                     cm->allow_high_precision_mv))) {
            set_default_warp_params(&cm->global_motion[frame]);
          }
          if (cm->global_motion[frame].wmtype != IDENTITY) break;
        }
        aom_clear_system_state();
      }
      if (cm->global_motion[frame].wmtype != IDENTITY) num_refs_using_gm++;
      cpi->gmparams_cost[frame] =
          gm_get_params_cost(&cm->global_motion[frame],
                             &cm->prev_frame->global_motion[frame],
                             cm->allow_high_precision_mv) +
          cpi->gmtype_cost[cm->global_motion[frame].wmtype] -
          cpi->gmtype_cost[IDENTITY];
    }
    cpi->global_motion_search_done = 1;
  }
  memcpy(cm->cur_frame->global_motion, cm->global_motion,
         TOTAL_REFS_PER_FRAME * sizeof(WarpedMotionParams));
#endif  // CONFIG_GLOBAL_MOTION

  for (i = 0; i < MAX_SEGMENTS; ++i) {
    const int qindex = cm->seg.enabled
                           ? av1_get_qindex(&cm->seg, i, cm->base_qindex)
                           : cm->base_qindex;
    xd->lossless[i] = qindex == 0 && cm->y_dc_delta_q == 0 &&
                      cm->uv_dc_delta_q == 0 && cm->uv_ac_delta_q == 0;
    xd->qindex[i] = qindex;
  }

  if (!cm->seg.enabled && xd->lossless[0]) x->optimize = 0;

  cm->tx_mode = select_tx_mode(cpi, xd);

#if CONFIG_DELTA_Q
  // Fix delta q resolution for the moment
  cm->delta_q_res = DEFAULT_DELTA_Q_RES;
// Set delta_q_present_flag before it is used for the first time
#if CONFIG_EXT_DELTA_Q
  cm->delta_lf_res = DEFAULT_DELTA_LF_RES;
  // update delta_q_present_flag and delta_lf_present_flag based on base_qindex
  cm->delta_q_present_flag &= cm->base_qindex > 0;
  cm->delta_lf_present_flag &= cm->base_qindex > 0;
#else
  cm->delta_q_present_flag =
      cpi->oxcf.aq_mode == DELTA_AQ && cm->base_qindex > 0;
#endif  // CONFIG_EXT_DELTA_Q
#endif

  av1_frame_init_quantizer(cpi);

  av1_initialize_rd_consts(cpi);
  av1_initialize_me_consts(cpi, x, cm->base_qindex);
  init_encode_frame_mb_context(cpi);
#if CONFIG_TEMPMV_SIGNALING
  if (last_fb_buf_idx != INVALID_IDX) {
    cm->prev_frame = &cm->buffer_pool->frame_bufs[last_fb_buf_idx];
    cm->use_prev_frame_mvs &= !cm->error_resilient_mode &&
                              cm->width == cm->prev_frame->buf.y_width &&
                              cm->height == cm->prev_frame->buf.y_height &&
                              !cm->intra_only && !cm->prev_frame->intra_only;
  }
#else
  cm->use_prev_frame_mvs =
      !cm->error_resilient_mode && cm->width == cm->last_width &&
      cm->height == cm->last_height && !cm->intra_only && cm->last_show_frame;
#endif

#if CONFIG_EXT_REFS
  // NOTE(zoeliu): As cm->prev_frame can take neither a frame of
  //               show_exisiting_frame=1, nor can it take a frame not used as
  //               a reference, it is probable that by the time it is being
  //               referred to, the frame buffer it originally points to may
  //               already get expired and have been reassigned to the current
  //               newly coded frame. Hence, we need to check whether this is
  //               the case, and if yes, we have 2 choices:
  //               (1) Simply disable the use of previous frame mvs; or
  //               (2) Have cm->prev_frame point to one reference frame buffer,
  //                   e.g. LAST_FRAME.
  if (cm->use_prev_frame_mvs && !enc_is_ref_frame_buf(cpi, cm->prev_frame)) {
    // Reassign the LAST_FRAME buffer to cm->prev_frame.
    cm->prev_frame = &cm->buffer_pool->frame_bufs[last_fb_buf_idx];
  }
#endif  // CONFIG_EXT_REFS

  // Special case: set prev_mi to NULL when the previous mode info
  // context cannot be used.
  cm->prev_mi =
      cm->use_prev_frame_mvs ? cm->prev_mip + cm->mi_stride + 1 : NULL;

#if CONFIG_VAR_TX
  x->txb_split_count = 0;
  av1_zero(x->blk_skip_drl);
#endif

  if (cpi->sf.partition_search_type == VAR_BASED_PARTITION &&
      cpi->td.var_root[0] == NULL)
    av1_setup_var_tree(&cpi->common, &cpi->td);

  {
    struct aom_usec_timer emr_timer;
    aom_usec_timer_start(&emr_timer);

#if CONFIG_FP_MB_STATS
    if (cpi->use_fp_mb_stats) {
      input_fpmb_stats(&cpi->twopass.firstpass_mb_stats, cm,
                       &cpi->twopass.this_frame_mb_stats);
    }
#endif

    // If allowed, encoding tiles in parallel with one thread handling one tile.
    // TODO(geza.lore): The multi-threaded encoder is not safe with more than
    // 1 tile rows, as it uses the single above_context et al arrays from
    // cpi->common
    if (AOMMIN(cpi->oxcf.max_threads, cm->tile_cols) > 1 && cm->tile_rows == 1)
      av1_encode_tiles_mt(cpi);
    else
      encode_tiles(cpi);

    aom_usec_timer_mark(&emr_timer);
    cpi->time_encode_sb_row += aom_usec_timer_elapsed(&emr_timer);
  }

#if 0
  // Keep record of the total distortion this time around for future use
  cpi->last_frame_distortion = cpi->frame_distortion;
#endif
}

void av1_encode_frame(AV1_COMP *cpi) {
  AV1_COMMON *const cm = &cpi->common;
#if CONFIG_EXT_TX
  // Indicates whether or not to use a default reduced set for ext-tx
  // rather than the potential full set of 16 transforms
  cm->reduced_tx_set_used = 0;
#endif  // CONFIG_EXT_TX

  // In the longer term the encoder should be generalized to match the
  // decoder such that we allow compound where one of the 3 buffers has a
  // different sign bias and that buffer is then the fixed ref. However, this
  // requires further work in the rd loop. For now the only supported encoder
  // side behavior is where the ALT ref buffer has opposite sign bias to
  // the other two.
  if (!frame_is_intra_only(cm)) {
#if CONFIG_LOWDELAY_COMPOUND  // Normative in encoder
    cpi->allow_comp_inter_inter = 1;
#if CONFIG_EXT_REFS
    cm->comp_fwd_ref[0] = LAST_FRAME;
    cm->comp_fwd_ref[1] = LAST2_FRAME;
    cm->comp_fwd_ref[2] = LAST3_FRAME;
    cm->comp_fwd_ref[3] = GOLDEN_FRAME;
    cm->comp_bwd_ref[0] = BWDREF_FRAME;
    cm->comp_bwd_ref[1] = ALTREF_FRAME;
#else
    cm->comp_fixed_ref = ALTREF_FRAME;
    cm->comp_var_ref[0] = LAST_FRAME;
    cm->comp_var_ref[1] = GOLDEN_FRAME;
#endif  // CONFIG_EXT_REFS
#else
    if ((cm->ref_frame_sign_bias[ALTREF_FRAME] ==
         cm->ref_frame_sign_bias[GOLDEN_FRAME]) ||
        (cm->ref_frame_sign_bias[ALTREF_FRAME] ==
         cm->ref_frame_sign_bias[LAST_FRAME])) {
      cpi->allow_comp_inter_inter = 0;
    } else {
      cpi->allow_comp_inter_inter = 1;

#if CONFIG_EXT_REFS
      cm->comp_fwd_ref[0] = LAST_FRAME;
      cm->comp_fwd_ref[1] = LAST2_FRAME;
      cm->comp_fwd_ref[2] = LAST3_FRAME;
      cm->comp_fwd_ref[3] = GOLDEN_FRAME;
      cm->comp_bwd_ref[0] = BWDREF_FRAME;
      cm->comp_bwd_ref[1] = ALTREF_FRAME;
#else
      cm->comp_fixed_ref = ALTREF_FRAME;
      cm->comp_var_ref[0] = LAST_FRAME;
      cm->comp_var_ref[1] = GOLDEN_FRAME;
#endif  // CONFIG_EXT_REFS
    }
#endif
  } else {
    cpi->allow_comp_inter_inter = 0;
  }

  if (cpi->sf.frame_parameter_update) {
    int i;
    RD_OPT *const rd_opt = &cpi->rd;
    FRAME_COUNTS *counts = cpi->td.counts;
    RD_COUNTS *const rdc = &cpi->td.rd_counts;

    // This code does a single RD pass over the whole frame assuming
    // either compound, single or hybrid prediction as per whatever has
    // worked best for that type of frame in the past.
    // It also predicts whether another coding mode would have worked
    // better than this coding mode. If that is the case, it remembers
    // that for subsequent frames.
    // It does the same analysis for transform size selection also.
    //
    // TODO(zoeliu): To investigate whether a frame_type other than
    // INTRA/ALTREF/GOLDEN/LAST needs to be specified seperately.
    const MV_REFERENCE_FRAME frame_type = get_frame_type(cpi);
    int64_t *const mode_thrs = rd_opt->prediction_type_threshes[frame_type];
    const int is_alt_ref = frame_type == ALTREF_FRAME;

/* prediction (compound, single or hybrid) mode selection */
#if CONFIG_REF_ADAPT
    // NOTE(zoeliu): "is_alt_ref" is true only for OVERLAY/INTNL_OVERLAY frames
    if (is_alt_ref || !cpi->allow_comp_inter_inter)
      cm->reference_mode = SINGLE_REFERENCE;
    else
      cm->reference_mode = REFERENCE_MODE_SELECT;
#else
    if (is_alt_ref || !cpi->allow_comp_inter_inter)
      cm->reference_mode = SINGLE_REFERENCE;
    else if (mode_thrs[COMPOUND_REFERENCE] > mode_thrs[SINGLE_REFERENCE] &&
             mode_thrs[COMPOUND_REFERENCE] > mode_thrs[REFERENCE_MODE_SELECT] &&
             check_dual_ref_flags(cpi) && cpi->static_mb_pct == 100)
      cm->reference_mode = COMPOUND_REFERENCE;
    else if (mode_thrs[SINGLE_REFERENCE] > mode_thrs[REFERENCE_MODE_SELECT])
      cm->reference_mode = SINGLE_REFERENCE;
    else
      cm->reference_mode = REFERENCE_MODE_SELECT;
#endif  // CONFIG_REF_ADAPT

#if CONFIG_DUAL_FILTER
    cm->interp_filter = SWITCHABLE;
#endif

    encode_frame_internal(cpi);

    for (i = 0; i < REFERENCE_MODES; ++i)
      mode_thrs[i] = (mode_thrs[i] + rdc->comp_pred_diff[i] / cm->MBs) / 2;

    if (cm->reference_mode == REFERENCE_MODE_SELECT) {
      int single_count_zero = 0;
      int comp_count_zero = 0;

      for (i = 0; i < COMP_INTER_CONTEXTS; i++) {
        single_count_zero += counts->comp_inter[i][0];
        comp_count_zero += counts->comp_inter[i][1];
      }

      if (comp_count_zero == 0) {
        cm->reference_mode = SINGLE_REFERENCE;
        av1_zero(counts->comp_inter);
#if !CONFIG_REF_ADAPT
      } else if (single_count_zero == 0) {
        cm->reference_mode = COMPOUND_REFERENCE;
        av1_zero(counts->comp_inter);
#endif  // !CONFIG_REF_ADAPT
      }
    }

#if CONFIG_VAR_TX
    if (cm->tx_mode == TX_MODE_SELECT && cpi->td.mb.txb_split_count == 0)
      cm->tx_mode = ALLOW_32X32 + CONFIG_TX64X64;
#else
    if (cm->tx_mode == TX_MODE_SELECT) {
#if CONFIG_TX64X64
      int count4x4 = 0;
      int count8x8_8x8p = 0, count8x8_lp = 0;
      int count16x16_16x16p = 0, count16x16_lp = 0;
      int count32x32_32x32p = 0, count32x32_lp = 0;
      int count64x64_64x64p = 0;
      for (i = 0; i < TX_SIZE_CONTEXTS; ++i) {
        // counts->tx_size[max_depth][context_idx][this_depth_level]
        count4x4 += counts->tx_size[0][i][0];
        count4x4 += counts->tx_size[1][i][0];
        count4x4 += counts->tx_size[2][i][0];
        count4x4 += counts->tx_size[3][i][0];

        count8x8_8x8p += counts->tx_size[0][i][1];
        count8x8_lp += counts->tx_size[1][i][1];
        count8x8_lp += counts->tx_size[2][i][1];
        count8x8_lp += counts->tx_size[3][i][1];

        count16x16_16x16p += counts->tx_size[1][i][2];
        count16x16_lp += counts->tx_size[2][i][2];
        count16x16_lp += counts->tx_size[3][i][2];

        count32x32_32x32p += counts->tx_size[2][i][3];
        count32x32_lp += counts->tx_size[3][i][3];

        count64x64_64x64p += counts->tx_size[3][i][4];
      }
#if CONFIG_EXT_TX && CONFIG_RECT_TX
      count4x4 += counts->tx_size_implied[0][TX_4X4];
      count4x4 += counts->tx_size_implied[1][TX_4X4];
      count4x4 += counts->tx_size_implied[2][TX_4X4];
      count4x4 += counts->tx_size_implied[3][TX_4X4];
      count8x8_8x8p += counts->tx_size_implied[1][TX_8X8];
      count8x8_lp += counts->tx_size_implied[2][TX_8X8];
      count8x8_lp += counts->tx_size_implied[3][TX_8X8];
      count8x8_lp += counts->tx_size_implied[4][TX_8X8];
      count16x16_16x16p += counts->tx_size_implied[2][TX_16X16];
      count16x16_lp += counts->tx_size_implied[3][TX_16X16];
      count16x16_lp += counts->tx_size_implied[4][TX_16X16];
      count32x32_32x32p += counts->tx_size_implied[3][TX_32X32];
      count32x32_lp += counts->tx_size_implied[4][TX_32X32];
      count64x64_64x64p += counts->tx_size_implied[4][TX_64X64];
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX
      if (count4x4 == 0 && count16x16_lp == 0 && count16x16_16x16p == 0 &&
          count32x32_lp == 0 && count32x32_32x32p == 0 &&
#if CONFIG_SUPERTX
          cm->counts.supertx_size[TX_16X16] == 0 &&
          cm->counts.supertx_size[TX_32X32] == 0 &&
          cm->counts.supertx_size[TX_64X64] == 0 &&
#endif
          count64x64_64x64p == 0) {
        cm->tx_mode = ALLOW_8X8;
        reset_skip_tx_size(cm, TX_8X8);
      } else if (count8x8_8x8p == 0 && count8x8_lp == 0 &&
                 count16x16_16x16p == 0 && count16x16_lp == 0 &&
                 count32x32_32x32p == 0 && count32x32_lp == 0 &&
#if CONFIG_SUPERTX
                 cm->counts.supertx_size[TX_8X8] == 0 &&
                 cm->counts.supertx_size[TX_16X16] == 0 &&
                 cm->counts.supertx_size[TX_32X32] == 0 &&
                 cm->counts.supertx_size[TX_64X64] == 0 &&
#endif
                 count64x64_64x64p == 0) {
        cm->tx_mode = ONLY_4X4;
        reset_skip_tx_size(cm, TX_4X4);
      } else if (count4x4 == 0 && count8x8_lp == 0 && count16x16_lp == 0 &&
                 count32x32_lp == 0) {
        cm->tx_mode = ALLOW_64X64;
      } else if (count4x4 == 0 && count8x8_lp == 0 && count16x16_lp == 0 &&
#if CONFIG_SUPERTX
                 cm->counts.supertx_size[TX_64X64] == 0 &&
#endif
                 count64x64_64x64p == 0) {
        cm->tx_mode = ALLOW_32X32;
        reset_skip_tx_size(cm, TX_32X32);
      } else if (count4x4 == 0 && count8x8_lp == 0 && count32x32_lp == 0 &&
                 count32x32_32x32p == 0 &&
#if CONFIG_SUPERTX
                 cm->counts.supertx_size[TX_32X32] == 0 &&
                 cm->counts.supertx_size[TX_64X64] == 0 &&
#endif
                 count64x64_64x64p == 0) {
        cm->tx_mode = ALLOW_16X16;
        reset_skip_tx_size(cm, TX_16X16);
      }

#else  // CONFIG_TX64X64

      int count4x4 = 0;
      int count8x8_lp = 0, count8x8_8x8p = 0;
      int count16x16_16x16p = 0, count16x16_lp = 0;
      int count32x32 = 0;
      for (i = 0; i < TX_SIZE_CONTEXTS; ++i) {
        // counts->tx_size[max_depth][context_idx][this_depth_level]
        count4x4 += counts->tx_size[0][i][0];
        count4x4 += counts->tx_size[1][i][0];
        count4x4 += counts->tx_size[2][i][0];

        count8x8_8x8p += counts->tx_size[0][i][1];
        count8x8_lp += counts->tx_size[1][i][1];
        count8x8_lp += counts->tx_size[2][i][1];

        count16x16_16x16p += counts->tx_size[1][i][2];
        count16x16_lp += counts->tx_size[2][i][2];
        count32x32 += counts->tx_size[2][i][3];
      }
#if CONFIG_EXT_TX && CONFIG_RECT_TX
      count4x4 += counts->tx_size_implied[0][TX_4X4];
      count4x4 += counts->tx_size_implied[1][TX_4X4];
      count4x4 += counts->tx_size_implied[2][TX_4X4];
      count4x4 += counts->tx_size_implied[3][TX_4X4];
      count8x8_8x8p += counts->tx_size_implied[1][TX_8X8];
      count8x8_lp += counts->tx_size_implied[2][TX_8X8];
      count8x8_lp += counts->tx_size_implied[3][TX_8X8];
      count16x16_lp += counts->tx_size_implied[3][TX_16X16];
      count16x16_16x16p += counts->tx_size_implied[2][TX_16X16];
      count32x32 += counts->tx_size_implied[3][TX_32X32];
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX
      if (count4x4 == 0 && count16x16_lp == 0 && count16x16_16x16p == 0 &&
#if CONFIG_SUPERTX
          cm->counts.supertx_size[TX_16X16] == 0 &&
          cm->counts.supertx_size[TX_32X32] == 0 &&
#endif  // CONFIG_SUPERTX
          count32x32 == 0) {
        cm->tx_mode = ALLOW_8X8;
        reset_skip_tx_size(cm, TX_8X8);
      } else if (count8x8_8x8p == 0 && count16x16_16x16p == 0 &&
                 count8x8_lp == 0 && count16x16_lp == 0 &&
#if CONFIG_SUPERTX
                 cm->counts.supertx_size[TX_8X8] == 0 &&
                 cm->counts.supertx_size[TX_16X16] == 0 &&
                 cm->counts.supertx_size[TX_32X32] == 0 &&
#endif  // CONFIG_SUPERTX
                 count32x32 == 0) {
        cm->tx_mode = ONLY_4X4;
        reset_skip_tx_size(cm, TX_4X4);
      } else if (count8x8_lp == 0 && count16x16_lp == 0 && count4x4 == 0) {
        cm->tx_mode = ALLOW_32X32;
      } else if (count32x32 == 0 && count8x8_lp == 0 &&
#if CONFIG_SUPERTX
                 cm->counts.supertx_size[TX_32X32] == 0 &&
#endif  // CONFIG_SUPERTX
                 count4x4 == 0) {
        cm->tx_mode = ALLOW_16X16;
        reset_skip_tx_size(cm, TX_16X16);
      }
#endif  // CONFIG_TX64X64
    }
#endif
  } else {
    encode_frame_internal(cpi);
  }
}

static void sum_intra_stats(FRAME_COUNTS *counts, MACROBLOCKD *xd,
                            const MODE_INFO *mi, const MODE_INFO *above_mi,
                            const MODE_INFO *left_mi, const int intraonly,
                            const int mi_row, const int mi_col) {
  const MB_MODE_INFO *const mbmi = &mi->mbmi;
  const PREDICTION_MODE y_mode = mbmi->mode;
  const PREDICTION_MODE uv_mode = mbmi->uv_mode;
  const BLOCK_SIZE bsize = mbmi->sb_type;
  const int unify_bsize = CONFIG_CB4X4;

  if (bsize < BLOCK_8X8 && !unify_bsize) {
    int idx, idy;
    const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];
    const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];
    for (idy = 0; idy < 2; idy += num_4x4_h)
      for (idx = 0; idx < 2; idx += num_4x4_w) {
        const int bidx = idy * 2 + idx;
        const PREDICTION_MODE bmode = mi->bmi[bidx].as_mode;
        if (intraonly) {
          const PREDICTION_MODE a = av1_above_block_mode(mi, above_mi, bidx);
          const PREDICTION_MODE l = av1_left_block_mode(mi, left_mi, bidx);
          ++counts->kf_y_mode[a][l][bmode];
        } else {
          ++counts->y_mode[0][bmode];
        }
      }
  } else {
    if (intraonly) {
      const PREDICTION_MODE above = av1_above_block_mode(mi, above_mi, 0);
      const PREDICTION_MODE left = av1_left_block_mode(mi, left_mi, 0);
      ++counts->kf_y_mode[above][left][y_mode];
    } else {
      ++counts->y_mode[size_group_lookup[bsize]][y_mode];
    }
#if CONFIG_FILTER_INTRA
    if (mbmi->mode == DC_PRED
#if CONFIG_PALETTE
        && mbmi->palette_mode_info.palette_size[0] == 0
#endif  // CONFIG_PALETTE
        ) {
      const int use_filter_intra_mode =
          mbmi->filter_intra_mode_info.use_filter_intra_mode[0];
      ++counts->filter_intra[0][use_filter_intra_mode];
    }
    if (mbmi->uv_mode == DC_PRED
#if CONFIG_PALETTE
        && mbmi->palette_mode_info.palette_size[1] == 0
#endif  // CONFIG_PALETTE
        ) {
      const int use_filter_intra_mode =
          mbmi->filter_intra_mode_info.use_filter_intra_mode[1];
      ++counts->filter_intra[1][use_filter_intra_mode];
    }
#endif  // CONFIG_FILTER_INTRA
#if CONFIG_EXT_INTRA && CONFIG_INTRA_INTERP
    if (av1_is_directional_mode(mbmi->mode, bsize)) {
      const int intra_filter_ctx = av1_get_pred_context_intra_interp(xd);
      const int p_angle =
          mode_to_angle_map[mbmi->mode] + mbmi->angle_delta[0] * ANGLE_STEP;
      if (av1_is_intra_filter_switchable(p_angle))
        ++counts->intra_filter[intra_filter_ctx][mbmi->intra_filter];
    }
#endif  // CONFIG_INTRA_INTERP && CONFIG_INTRA_INTERP
  }

#if CONFIG_CB4X4
  if (!is_chroma_reference(mi_row, mi_col, bsize, xd->plane[1].subsampling_x,
                           xd->plane[1].subsampling_y))
    return;
#else
  (void)mi_row;
  (void)mi_col;
  (void)xd;
#endif
  ++counts->uv_mode[y_mode][uv_mode];
}

#if CONFIG_VAR_TX
static void update_txfm_count(MACROBLOCK *x, MACROBLOCKD *xd,
                              FRAME_COUNTS *counts, TX_SIZE tx_size, int depth,
                              int blk_row, int blk_col) {
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  const int tx_row = blk_row >> 1;
  const int tx_col = blk_col >> 1;
  const int max_blocks_high = max_block_high(xd, mbmi->sb_type, 0);
  const int max_blocks_wide = max_block_wide(xd, mbmi->sb_type, 0);
  int ctx = txfm_partition_context(xd->above_txfm_context + tx_col,
                                   xd->left_txfm_context + tx_row,
                                   mbmi->sb_type, tx_size);
  const TX_SIZE plane_tx_size = mbmi->inter_tx_size[tx_row][tx_col];

  if (blk_row >= max_blocks_high || blk_col >= max_blocks_wide) return;

  if (tx_size == plane_tx_size) {
    ++counts->txfm_partition[ctx][0];
    mbmi->tx_size = tx_size;
    txfm_partition_update(xd->above_txfm_context + tx_col,
                          xd->left_txfm_context + tx_row, tx_size, tx_size);
  } else {
    const TX_SIZE sub_txs = sub_tx_size_map[tx_size];
    const int bs = tx_size_wide_unit[sub_txs];
    int i;

    ++counts->txfm_partition[ctx][1];
    ++x->txb_split_count;

    if (tx_size == TX_8X8) {
      mbmi->inter_tx_size[tx_row][tx_col] = TX_4X4;
      mbmi->tx_size = TX_4X4;
      txfm_partition_update(xd->above_txfm_context + tx_col,
                            xd->left_txfm_context + tx_row, TX_4X4, tx_size);
      return;
    }

    for (i = 0; i < 4; ++i) {
      int offsetr = (i >> 1) * bs;
      int offsetc = (i & 0x01) * bs;
      update_txfm_count(x, xd, counts, sub_txs, depth + 1, blk_row + offsetr,
                        blk_col + offsetc);
    }
  }
}

static void tx_partition_count_update(const AV1_COMMON *const cm, MACROBLOCK *x,
                                      BLOCK_SIZE plane_bsize, int mi_row,
                                      int mi_col, FRAME_COUNTS *td_counts) {
  MACROBLOCKD *xd = &x->e_mbd;
  const int mi_width = block_size_wide[plane_bsize] >> tx_size_wide_log2[0];
  const int mi_height = block_size_high[plane_bsize] >> tx_size_wide_log2[0];
  TX_SIZE max_tx_size = get_vartx_max_txsize(&xd->mi[0]->mbmi, plane_bsize);
  const int bh = tx_size_high_unit[max_tx_size];
  const int bw = tx_size_wide_unit[max_tx_size];
  int idx, idy;

  xd->above_txfm_context = cm->above_txfm_context + mi_col;
  xd->left_txfm_context =
      xd->left_txfm_context_buffer + (mi_row & MAX_MIB_MASK);

  for (idy = 0; idy < mi_height; idy += bh)
    for (idx = 0; idx < mi_width; idx += bw)
      update_txfm_count(x, xd, td_counts, max_tx_size, mi_width != mi_height,
                        idy, idx);
}

static void set_txfm_context(MACROBLOCKD *xd, TX_SIZE tx_size, int blk_row,
                             int blk_col) {
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  const int tx_row = blk_row >> 1;
  const int tx_col = blk_col >> 1;
  const int max_blocks_high = max_block_high(xd, mbmi->sb_type, 0);
  const int max_blocks_wide = max_block_wide(xd, mbmi->sb_type, 0);
  const TX_SIZE plane_tx_size = mbmi->inter_tx_size[tx_row][tx_col];

  if (blk_row >= max_blocks_high || blk_col >= max_blocks_wide) return;

  if (tx_size == plane_tx_size) {
    mbmi->tx_size = tx_size;
    txfm_partition_update(xd->above_txfm_context + tx_col,
                          xd->left_txfm_context + tx_row, tx_size, tx_size);

  } else {
    const TX_SIZE sub_txs = sub_tx_size_map[tx_size];
    const int bsl = tx_size_wide_unit[sub_txs];
    int i;

    if (tx_size == TX_8X8) {
      mbmi->inter_tx_size[tx_row][tx_col] = TX_4X4;
      mbmi->tx_size = TX_4X4;
      txfm_partition_update(xd->above_txfm_context + tx_col,
                            xd->left_txfm_context + tx_row, TX_4X4, tx_size);
      return;
    }

    assert(bsl > 0);
    for (i = 0; i < 4; ++i) {
      int offsetr = (i >> 1) * bsl;
      int offsetc = (i & 0x01) * bsl;
      set_txfm_context(xd, sub_txs, blk_row + offsetr, blk_col + offsetc);
    }
  }
}

static void tx_partition_set_contexts(const AV1_COMMON *const cm,
                                      MACROBLOCKD *xd, BLOCK_SIZE plane_bsize,
                                      int mi_row, int mi_col) {
  const int mi_width = block_size_wide[plane_bsize] >> tx_size_wide_log2[0];
  const int mi_height = block_size_high[plane_bsize] >> tx_size_high_log2[0];
  TX_SIZE max_tx_size = get_vartx_max_txsize(&xd->mi[0]->mbmi, plane_bsize);
  const int bh = tx_size_high_unit[max_tx_size];
  const int bw = tx_size_wide_unit[max_tx_size];
  int idx, idy;

  xd->above_txfm_context = cm->above_txfm_context + mi_col;
  xd->left_txfm_context =
      xd->left_txfm_context_buffer + (mi_row & MAX_MIB_MASK);

  for (idy = 0; idy < mi_height; idy += bh)
    for (idx = 0; idx < mi_width; idx += bw)
      set_txfm_context(xd, max_tx_size, idy, idx);
}
#endif

void av1_update_tx_type_count(const AV1_COMMON *cm, MACROBLOCKD *xd,
#if CONFIG_TXK_SEL
                              int block, int plane,
#endif
                              BLOCK_SIZE bsize, TX_SIZE tx_size,
                              FRAME_COUNTS *counts) {
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  int is_inter = is_inter_block(mbmi);
#if !CONFIG_TXK_SEL
  TX_TYPE tx_type = mbmi->tx_type;
#else
  // Only y plane's tx_type is updated
  if (plane > 0) return;
  TX_TYPE tx_type = get_tx_type(PLANE_TYPE_Y, xd, block, tx_size);
#endif
#if CONFIG_EXT_TX
  if (get_ext_tx_types(tx_size, bsize, is_inter, cm->reduced_tx_set_used) > 1 &&
      cm->base_qindex > 0 && !mbmi->skip &&
      !segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
    const int eset =
        get_ext_tx_set(tx_size, bsize, is_inter, cm->reduced_tx_set_used);
    if (eset > 0) {
      if (is_inter) {
        ++counts->inter_ext_tx[eset][txsize_sqr_map[tx_size]][tx_type];
      } else {
        ++counts->intra_ext_tx[eset][txsize_sqr_map[tx_size]][mbmi->mode]
                              [tx_type];
      }
    }
  }
#else
  (void)bsize;
  if (tx_size < TX_32X32 &&
      ((!cm->seg.enabled && cm->base_qindex > 0) ||
       (cm->seg.enabled && xd->qindex[mbmi->segment_id] > 0)) &&
      !mbmi->skip &&
      !segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
    if (is_inter) {
      ++counts->inter_ext_tx[tx_size][tx_type];
    } else {
      ++counts->intra_ext_tx[tx_size][intra_mode_to_tx_type_context[mbmi->mode]]
                            [tx_type];
    }
  }
#endif  // CONFIG_EXT_TX
}

static void encode_superblock(const AV1_COMP *const cpi, ThreadData *td,
                              TOKENEXTRA **t, RUN_TYPE dry_run, int mi_row,
                              int mi_col, BLOCK_SIZE bsize, int *rate) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  MODE_INFO **mi_8x8 = xd->mi;
  MODE_INFO *mi = mi_8x8[0];
  MB_MODE_INFO *mbmi = &mi->mbmi;
  const int seg_skip =
      segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP);
  const int mis = cm->mi_stride;
  const int mi_width = mi_size_wide[bsize];
  const int mi_height = mi_size_high[bsize];
  const int is_inter = is_inter_block(mbmi);
#if CONFIG_CB4X4
  const BLOCK_SIZE block_size = bsize;
#else
  const BLOCK_SIZE block_size = AOMMAX(bsize, BLOCK_8X8);
#endif

#if CONFIG_PVQ
  x->pvq_speed = 0;
  x->pvq_coded = (dry_run == OUTPUT_ENABLED) ? 1 : 0;
#endif
#if CONFIG_CFL
  x->cfl_store_y = (dry_run == OUTPUT_ENABLED) ? 1 : 0;
#endif

  if (!is_inter) {
    int plane;
    mbmi->skip = 1;
    for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
      av1_encode_intra_block_plane((AV1_COMMON *)cm, x, block_size, plane, 1,
                                   mi_row, mi_col);
    }
    if (!dry_run) {
      sum_intra_stats(td->counts, xd, mi, xd->above_mi, xd->left_mi,
                      frame_is_intra_only(cm), mi_row, mi_col);
    }
#if CONFIG_PALETTE
    if (bsize >= BLOCK_8X8 && !dry_run) {
      for (plane = 0; plane <= 1; ++plane) {
        if (mbmi->palette_mode_info.palette_size[plane] > 0) {
          mbmi->palette_mode_info.palette_first_color_idx[plane] =
              xd->plane[plane].color_index_map[0];
          // TODO(huisu): this increases the use of token buffer. Needs stretch
          // test to verify.
          av1_tokenize_palette_sb(cpi, td, plane, t, dry_run, bsize, rate);
        }
      }
    }
#endif  // CONFIG_PALETTE
#if CONFIG_VAR_TX
    mbmi->min_tx_size = get_min_tx_size(mbmi->tx_size);
#endif
#if CONFIG_LV_MAP
    av1_update_txb_context(cpi, td, dry_run, block_size, rate, mi_row, mi_col);
#else   // CONFIG_LV_MAP
    av1_tokenize_sb(cpi, td, t, dry_run, block_size, rate, mi_row, mi_col);
#endif  // CONFIG_LV_MAP
  } else {
    int ref;
    const int is_compound = has_second_ref(mbmi);

    set_ref_ptrs(cm, xd, mbmi->ref_frame[0], mbmi->ref_frame[1]);
    for (ref = 0; ref < 1 + is_compound; ++ref) {
      YV12_BUFFER_CONFIG *cfg = get_ref_frame_buffer(cpi, mbmi->ref_frame[ref]);
#if CONFIG_INTRABC
      assert(IMPLIES(!is_intrabc_block(mbmi), cfg));
#else
      assert(cfg != NULL);
#endif  // !CONFIG_INTRABC
      av1_setup_pre_planes(xd, ref, cfg, mi_row, mi_col,
                           &xd->block_refs[ref]->sf);
    }
    av1_build_inter_predictors_sby(xd, mi_row, mi_col, NULL, block_size);

    av1_build_inter_predictors_sbuv(xd, mi_row, mi_col, NULL, block_size);
#if CONFIG_MOTION_VAR
    if (mbmi->motion_mode == OBMC_CAUSAL) {
#if CONFIG_NCOBMC
      if (dry_run == OUTPUT_ENABLED)
        av1_build_ncobmc_inter_predictors_sb(cm, xd, mi_row, mi_col);
      else
#endif
        av1_build_obmc_inter_predictors_sb(cm, xd, mi_row, mi_col);
    }
#endif  // CONFIG_MOTION_VAR

    av1_encode_sb((AV1_COMMON *)cm, x, block_size, mi_row, mi_col);
#if CONFIG_VAR_TX
    if (mbmi->skip) mbmi->min_tx_size = get_min_tx_size(mbmi->tx_size);
    av1_tokenize_sb_vartx(cpi, td, t, dry_run, mi_row, mi_col, block_size,
                          rate);
#else
#if CONFIG_LV_MAP
    av1_update_txb_context(cpi, td, dry_run, block_size, rate, mi_row, mi_col);
#else   // CONFIG_LV_MAP
    av1_tokenize_sb(cpi, td, t, dry_run, block_size, rate, mi_row, mi_col);
#endif  // CONFIG_LV_MAP
#endif
  }

  if (!dry_run) {
#if CONFIG_VAR_TX
    TX_SIZE tx_size =
        is_inter && !mbmi->skip ? mbmi->min_tx_size : mbmi->tx_size;
#else
    TX_SIZE tx_size = mbmi->tx_size;
#endif
    if (cm->tx_mode == TX_MODE_SELECT && !xd->lossless[mbmi->segment_id] &&
#if CONFIG_CB4X4 && (CONFIG_VAR_TX || CONFIG_EXT_TX) && CONFIG_RECT_TX
        mbmi->sb_type > BLOCK_4X4 &&
#else
        mbmi->sb_type >= BLOCK_8X8 &&
#endif
        !(is_inter && (mbmi->skip || seg_skip))) {
#if CONFIG_VAR_TX
      if (is_inter) {
        tx_partition_count_update(cm, x, bsize, mi_row, mi_col, td->counts);
      } else {
        const int tx_size_ctx = get_tx_size_context(xd);
        const int tx_size_cat = is_inter ? inter_tx_size_cat_lookup[bsize]
                                         : intra_tx_size_cat_lookup[bsize];
        const TX_SIZE coded_tx_size = txsize_sqr_up_map[tx_size];
        const int depth = tx_size_to_depth(coded_tx_size);
        ++td->counts->tx_size[tx_size_cat][tx_size_ctx][depth];
        if (tx_size != max_txsize_lookup[bsize]) ++x->txb_split_count;
      }
#else
      const int tx_size_ctx = get_tx_size_context(xd);
      const int tx_size_cat = is_inter ? inter_tx_size_cat_lookup[bsize]
                                       : intra_tx_size_cat_lookup[bsize];
      const TX_SIZE coded_tx_size = txsize_sqr_up_map[tx_size];
      const int depth = tx_size_to_depth(coded_tx_size);

      ++td->counts->tx_size[tx_size_cat][tx_size_ctx][depth];
#endif
#if CONFIG_EXT_TX && CONFIG_RECT_TX
      assert(IMPLIES(is_rect_tx(tx_size), is_rect_tx_allowed(xd, mbmi)));
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX
    } else {
      int i, j;
      TX_SIZE intra_tx_size;
      // The new intra coding scheme requires no change of transform size
      if (is_inter) {
        if (xd->lossless[mbmi->segment_id]) {
          intra_tx_size = TX_4X4;
        } else {
          intra_tx_size = tx_size_from_tx_mode(bsize, cm->tx_mode, 1);
        }
      } else {
#if CONFIG_EXT_TX && CONFIG_RECT_TX
        intra_tx_size = tx_size;
#else
        intra_tx_size = (bsize >= BLOCK_8X8) ? tx_size : TX_4X4;
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX
      }
#if CONFIG_EXT_TX && CONFIG_RECT_TX
      ++td->counts->tx_size_implied[max_txsize_lookup[bsize]]
                                   [txsize_sqr_up_map[tx_size]];
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX

      for (j = 0; j < mi_height; j++)
        for (i = 0; i < mi_width; i++)
          if (mi_col + i < cm->mi_cols && mi_row + j < cm->mi_rows)
            mi_8x8[mis * j + i]->mbmi.tx_size = intra_tx_size;

#if CONFIG_VAR_TX
      mbmi->min_tx_size = get_min_tx_size(intra_tx_size);
      if (intra_tx_size != max_txsize_lookup[bsize]) ++x->txb_split_count;
#endif
    }

    ++td->counts->tx_size_totals[txsize_sqr_map[tx_size]];
    ++td->counts
          ->tx_size_totals[txsize_sqr_map[get_uv_tx_size(mbmi, &xd->plane[1])]];
#if !CONFIG_TXK_SEL
    av1_update_tx_type_count(cm, xd, bsize, tx_size, td->counts);
#endif
  }

#if CONFIG_VAR_TX
  if (cm->tx_mode == TX_MODE_SELECT &&
#if CONFIG_CB4X4
      mbmi->sb_type > BLOCK_4X4 &&
#else
      mbmi->sb_type >= BLOCK_8X8 &&
#endif
      is_inter && !(mbmi->skip || seg_skip)) {
    if (dry_run) tx_partition_set_contexts(cm, xd, bsize, mi_row, mi_col);
  } else {
    TX_SIZE tx_size = mbmi->tx_size;
    // The new intra coding scheme requires no change of transform size
    if (is_inter)
      tx_size = tx_size_from_tx_mode(bsize, cm->tx_mode, is_inter);
    else
      tx_size = (bsize > BLOCK_4X4) ? tx_size : TX_4X4;
    mbmi->tx_size = tx_size;
    set_txfm_ctxs(tx_size, xd->n8_w, xd->n8_h, (mbmi->skip || seg_skip), xd);
  }
#endif  // CONFIG_VAR_TX
}

#if CONFIG_SUPERTX
static int check_intra_b(PICK_MODE_CONTEXT *ctx) {
  if (!is_inter_mode((&ctx->mic)->mbmi.mode)) return 1;
#if CONFIG_EXT_INTER
  if (ctx->mic.mbmi.ref_frame[1] == INTRA_FRAME) return 1;
#endif  // CONFIG_EXT_INTER
  return 0;
}

static int check_intra_sb(const AV1_COMP *const cpi, const TileInfo *const tile,
                          int mi_row, int mi_col, BLOCK_SIZE bsize,
                          PC_TREE *pc_tree) {
  const AV1_COMMON *const cm = &cpi->common;
  const int hbs = mi_size_wide[bsize] / 2;
  const PARTITION_TYPE partition = pc_tree->partitioning;
  const BLOCK_SIZE subsize = get_subsize(bsize, partition);
#if CONFIG_EXT_PARTITION_TYPES
  int i;
#endif
#if CONFIG_CB4X4
  const int unify_bsize = 1;
#else
  const int unify_bsize = 0;
#endif

#if !CONFIG_CB4X4
  assert(bsize >= BLOCK_8X8);
#endif

  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) return 1;

  switch (partition) {
    case PARTITION_NONE: return check_intra_b(&pc_tree->none); break;
    case PARTITION_VERT:
      if (check_intra_b(&pc_tree->vertical[0])) return 1;
      if (mi_col + hbs < cm->mi_cols && (bsize > BLOCK_8X8 || unify_bsize)) {
        if (check_intra_b(&pc_tree->vertical[1])) return 1;
      }
      break;
    case PARTITION_HORZ:
      if (check_intra_b(&pc_tree->horizontal[0])) return 1;
      if (mi_row + hbs < cm->mi_rows && (bsize > BLOCK_8X8 || unify_bsize)) {
        if (check_intra_b(&pc_tree->horizontal[1])) return 1;
      }
      break;
    case PARTITION_SPLIT:
      if (bsize == BLOCK_8X8 && !unify_bsize) {
        if (check_intra_b(pc_tree->leaf_split[0])) return 1;
      } else {
        if (check_intra_sb(cpi, tile, mi_row, mi_col, subsize,
                           pc_tree->split[0]))
          return 1;
        if (check_intra_sb(cpi, tile, mi_row, mi_col + hbs, subsize,
                           pc_tree->split[1]))
          return 1;
        if (check_intra_sb(cpi, tile, mi_row + hbs, mi_col, subsize,
                           pc_tree->split[2]))
          return 1;
        if (check_intra_sb(cpi, tile, mi_row + hbs, mi_col + hbs, subsize,
                           pc_tree->split[3]))
          return 1;
      }
      break;
#if CONFIG_EXT_PARTITION_TYPES
    case PARTITION_HORZ_A:
      for (i = 0; i < 3; i++) {
        if (check_intra_b(&pc_tree->horizontala[i])) return 1;
      }
      break;
    case PARTITION_HORZ_B:
      for (i = 0; i < 3; i++) {
        if (check_intra_b(&pc_tree->horizontalb[i])) return 1;
      }
      break;
    case PARTITION_VERT_A:
      for (i = 0; i < 3; i++) {
        if (check_intra_b(&pc_tree->verticala[i])) return 1;
      }
      break;
    case PARTITION_VERT_B:
      for (i = 0; i < 3; i++) {
        if (check_intra_b(&pc_tree->verticalb[i])) return 1;
      }
      break;
#endif  // CONFIG_EXT_PARTITION_TYPES
    default: assert(0);
  }
  return 0;
}

static int check_supertx_b(TX_SIZE supertx_size, PICK_MODE_CONTEXT *ctx) {
  return ctx->mic.mbmi.tx_size == supertx_size;
}

static int check_supertx_sb(BLOCK_SIZE bsize, TX_SIZE supertx_size,
                            PC_TREE *pc_tree) {
  PARTITION_TYPE partition;
  BLOCK_SIZE subsize;
#if CONFIG_CB4X4
  const int unify_bsize = 1;
#else
  const int unify_bsize = 0;
#endif

  partition = pc_tree->partitioning;
  subsize = get_subsize(bsize, partition);
  switch (partition) {
    case PARTITION_NONE: return check_supertx_b(supertx_size, &pc_tree->none);
    case PARTITION_VERT:
      return check_supertx_b(supertx_size, &pc_tree->vertical[0]);
    case PARTITION_HORZ:
      return check_supertx_b(supertx_size, &pc_tree->horizontal[0]);
    case PARTITION_SPLIT:
      if (bsize == BLOCK_8X8 && !unify_bsize)
        return check_supertx_b(supertx_size, pc_tree->leaf_split[0]);
      else
        return check_supertx_sb(subsize, supertx_size, pc_tree->split[0]);
#if CONFIG_EXT_PARTITION_TYPES
    case PARTITION_HORZ_A:
      return check_supertx_b(supertx_size, &pc_tree->horizontala[0]);
    case PARTITION_HORZ_B:
      return check_supertx_b(supertx_size, &pc_tree->horizontalb[0]);
    case PARTITION_VERT_A:
      return check_supertx_b(supertx_size, &pc_tree->verticala[0]);
    case PARTITION_VERT_B:
      return check_supertx_b(supertx_size, &pc_tree->verticalb[0]);
#endif  // CONFIG_EXT_PARTITION_TYPES
    default: assert(0); return 0;
  }
}

static void predict_superblock(const AV1_COMP *const cpi, ThreadData *td,
#if CONFIG_EXT_INTER
                               int mi_row_ori, int mi_col_ori,
#endif  // CONFIG_EXT_INTER
                               int mi_row_pred, int mi_col_pred,
                               BLOCK_SIZE bsize_pred, int b_sub8x8, int block) {
  // Used in supertx
  // (mi_row_ori, mi_col_ori): location for mv
  // (mi_row_pred, mi_col_pred, bsize_pred): region to predict
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  MODE_INFO *mi_8x8 = xd->mi[0];
  MODE_INFO *mi = mi_8x8;
  MB_MODE_INFO *mbmi = &mi->mbmi;
  int ref;
  const int is_compound = has_second_ref(mbmi);

  set_ref_ptrs(cm, xd, mbmi->ref_frame[0], mbmi->ref_frame[1]);

  for (ref = 0; ref < 1 + is_compound; ++ref) {
    YV12_BUFFER_CONFIG *cfg = get_ref_frame_buffer(cpi, mbmi->ref_frame[ref]);
    av1_setup_pre_planes(xd, ref, cfg, mi_row_pred, mi_col_pred,
                         &xd->block_refs[ref]->sf);
  }

  if (!b_sub8x8)
    av1_build_inter_predictors_sb_extend(xd,
#if CONFIG_EXT_INTER
                                         mi_row_ori, mi_col_ori,
#endif  // CONFIG_EXT_INTER
                                         mi_row_pred, mi_col_pred, bsize_pred);
  else
    av1_build_inter_predictors_sb_sub8x8_extend(xd,
#if CONFIG_EXT_INTER
                                                mi_row_ori, mi_col_ori,
#endif  // CONFIG_EXT_INTER
                                                mi_row_pred, mi_col_pred,
                                                bsize_pred, block);
}

static void predict_b_extend(const AV1_COMP *const cpi, ThreadData *td,
                             const TileInfo *const tile, int block,
                             int mi_row_ori, int mi_col_ori, int mi_row_pred,
                             int mi_col_pred, int mi_row_top, int mi_col_top,
                             uint8_t *dst_buf[3], int dst_stride[3],
                             BLOCK_SIZE bsize_top, BLOCK_SIZE bsize_pred,
                             RUN_TYPE dry_run, int b_sub8x8, int bextend) {
  // Used in supertx
  // (mi_row_ori, mi_col_ori): location for mv
  // (mi_row_pred, mi_col_pred, bsize_pred): region to predict
  // (mi_row_top, mi_col_top, bsize_top): region of the top partition size
  // block: sub location of sub8x8 blocks
  // b_sub8x8: 1: ori is sub8x8; 0: ori is not sub8x8
  // bextend: 1: region to predict is an extension of ori; 0: not

  MACROBLOCK *const x = &td->mb;
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  int r = (mi_row_pred - mi_row_top) * MI_SIZE;
  int c = (mi_col_pred - mi_col_top) * MI_SIZE;
  const int mi_width_top = mi_size_wide[bsize_top];
  const int mi_height_top = mi_size_high[bsize_top];

  if (mi_row_pred < mi_row_top || mi_col_pred < mi_col_top ||
      mi_row_pred >= mi_row_top + mi_height_top ||
      mi_col_pred >= mi_col_top + mi_width_top || mi_row_pred >= cm->mi_rows ||
      mi_col_pred >= cm->mi_cols)
    return;

  set_offsets_extend(cpi, td, tile, mi_row_pred, mi_col_pred, mi_row_ori,
                     mi_col_ori, bsize_pred);
  xd->plane[0].dst.stride = dst_stride[0];
  xd->plane[1].dst.stride = dst_stride[1];
  xd->plane[2].dst.stride = dst_stride[2];
  xd->plane[0].dst.buf = dst_buf[0] +
                         (r >> xd->plane[0].subsampling_y) * dst_stride[0] +
                         (c >> xd->plane[0].subsampling_x);
  xd->plane[1].dst.buf = dst_buf[1] +
                         (r >> xd->plane[1].subsampling_y) * dst_stride[1] +
                         (c >> xd->plane[1].subsampling_x);
  xd->plane[2].dst.buf = dst_buf[2] +
                         (r >> xd->plane[2].subsampling_y) * dst_stride[2] +
                         (c >> xd->plane[2].subsampling_x);

  predict_superblock(cpi, td,
#if CONFIG_EXT_INTER
                     mi_row_ori, mi_col_ori,
#endif  // CONFIG_EXT_INTER
                     mi_row_pred, mi_col_pred, bsize_pred, b_sub8x8, block);

  if (!dry_run && !bextend)
    update_stats(&cpi->common, td, mi_row_pred, mi_col_pred, 1);
}

static void extend_dir(const AV1_COMP *const cpi, ThreadData *td,
                       const TileInfo *const tile, int block, BLOCK_SIZE bsize,
                       BLOCK_SIZE top_bsize, int mi_row, int mi_col,
                       int mi_row_top, int mi_col_top, RUN_TYPE dry_run,
                       uint8_t *dst_buf[3], int dst_stride[3], int dir) {
  // dir: 0-lower, 1-upper, 2-left, 3-right
  //      4-lowerleft, 5-upperleft, 6-lowerright, 7-upperright
  MACROBLOCKD *xd = &td->mb.e_mbd;
  const int mi_width = mi_size_wide[bsize];
  const int mi_height = mi_size_high[bsize];
  int xss = xd->plane[1].subsampling_x;
  int yss = xd->plane[1].subsampling_y;
#if CONFIG_CB4X4
  const int unify_bsize = 1;
#else
  const int unify_bsize = 0;
#endif
  int b_sub8x8 = (bsize < BLOCK_8X8) && !unify_bsize ? 1 : 0;
  int wide_unit, high_unit;
  int i, j;
  int ext_offset = 0;

  BLOCK_SIZE extend_bsize;
  int mi_row_pred, mi_col_pred;

  if (dir == 0 || dir == 1) {  // lower and upper
    extend_bsize =
        (mi_width == mi_size_wide[BLOCK_8X8] || bsize < BLOCK_8X8 || xss < yss)
            ? BLOCK_8X8
            : BLOCK_16X8;

#if CONFIG_CB4X4
    if (bsize < BLOCK_8X8) {
      extend_bsize = BLOCK_4X4;
      ext_offset = mi_size_wide[BLOCK_8X8];
    }
#endif
    wide_unit = mi_size_wide[extend_bsize];
    high_unit = mi_size_high[extend_bsize];

    mi_row_pred = mi_row + ((dir == 0) ? mi_height : -(mi_height + ext_offset));
    mi_col_pred = mi_col;

    for (j = 0; j < mi_height + ext_offset; j += high_unit)
      for (i = 0; i < mi_width + ext_offset; i += wide_unit)
        predict_b_extend(cpi, td, tile, block, mi_row, mi_col, mi_row_pred + j,
                         mi_col_pred + i, mi_row_top, mi_col_top, dst_buf,
                         dst_stride, top_bsize, extend_bsize, dry_run, b_sub8x8,
                         1);
  } else if (dir == 2 || dir == 3) {  // left and right
    extend_bsize =
        (mi_height == mi_size_high[BLOCK_8X8] || bsize < BLOCK_8X8 || yss < xss)
            ? BLOCK_8X8
            : BLOCK_8X16;
#if CONFIG_CB4X4
    if (bsize < BLOCK_8X8) {
      extend_bsize = BLOCK_4X4;
      ext_offset = mi_size_wide[BLOCK_8X8];
    }
#endif
    wide_unit = mi_size_wide[extend_bsize];
    high_unit = mi_size_high[extend_bsize];

    mi_row_pred = mi_row;
    mi_col_pred = mi_col + ((dir == 3) ? mi_width : -(mi_width + ext_offset));

    for (j = 0; j < mi_height + ext_offset; j += high_unit)
      for (i = 0; i < mi_width + ext_offset; i += wide_unit)
        predict_b_extend(cpi, td, tile, block, mi_row, mi_col, mi_row_pred + j,
                         mi_col_pred + i, mi_row_top, mi_col_top, dst_buf,
                         dst_stride, top_bsize, extend_bsize, dry_run, b_sub8x8,
                         1);
  } else {
    extend_bsize = BLOCK_8X8;
#if CONFIG_CB4X4
    if (bsize < BLOCK_8X8) {
      extend_bsize = BLOCK_4X4;
      ext_offset = mi_size_wide[BLOCK_8X8];
    }
#endif
    wide_unit = mi_size_wide[extend_bsize];
    high_unit = mi_size_high[extend_bsize];

    mi_row_pred = mi_row + ((dir == 4 || dir == 6) ? mi_height
                                                   : -(mi_height + ext_offset));
    mi_col_pred =
        mi_col + ((dir == 6 || dir == 7) ? mi_width : -(mi_width + ext_offset));

    for (j = 0; j < mi_height + ext_offset; j += high_unit)
      for (i = 0; i < mi_width + ext_offset; i += wide_unit)
        predict_b_extend(cpi, td, tile, block, mi_row, mi_col, mi_row_pred + j,
                         mi_col_pred + i, mi_row_top, mi_col_top, dst_buf,
                         dst_stride, top_bsize, extend_bsize, dry_run, b_sub8x8,
                         1);
  }
}

static void extend_all(const AV1_COMP *const cpi, ThreadData *td,
                       const TileInfo *const tile, int block, BLOCK_SIZE bsize,
                       BLOCK_SIZE top_bsize, int mi_row, int mi_col,
                       int mi_row_top, int mi_col_top, RUN_TYPE dry_run,
                       uint8_t *dst_buf[3], int dst_stride[3]) {
  assert(block >= 0 && block < 4);
  extend_dir(cpi, td, tile, block, bsize, top_bsize, mi_row, mi_col, mi_row_top,
             mi_col_top, dry_run, dst_buf, dst_stride, 0);
  extend_dir(cpi, td, tile, block, bsize, top_bsize, mi_row, mi_col, mi_row_top,
             mi_col_top, dry_run, dst_buf, dst_stride, 1);
  extend_dir(cpi, td, tile, block, bsize, top_bsize, mi_row, mi_col, mi_row_top,
             mi_col_top, dry_run, dst_buf, dst_stride, 2);
  extend_dir(cpi, td, tile, block, bsize, top_bsize, mi_row, mi_col, mi_row_top,
             mi_col_top, dry_run, dst_buf, dst_stride, 3);
  extend_dir(cpi, td, tile, block, bsize, top_bsize, mi_row, mi_col, mi_row_top,
             mi_col_top, dry_run, dst_buf, dst_stride, 4);
  extend_dir(cpi, td, tile, block, bsize, top_bsize, mi_row, mi_col, mi_row_top,
             mi_col_top, dry_run, dst_buf, dst_stride, 5);
  extend_dir(cpi, td, tile, block, bsize, top_bsize, mi_row, mi_col, mi_row_top,
             mi_col_top, dry_run, dst_buf, dst_stride, 6);
  extend_dir(cpi, td, tile, block, bsize, top_bsize, mi_row, mi_col, mi_row_top,
             mi_col_top, dry_run, dst_buf, dst_stride, 7);
}

// This function generates prediction for multiple blocks, between which
// discontinuity around boundary is reduced by smoothing masks. The basic
// smoothing mask is a soft step function along horz/vert direction. In more
// complicated case when a block is split into 4 subblocks, the basic mask is
// first applied to neighboring subblocks (2 pairs) in horizontal direction and
// then applied to the 2 masked prediction mentioned above in vertical direction
// If the block is split into more than one level, at every stage, masked
// prediction is stored in dst_buf[] passed from higher level.
static void predict_sb_complex(const AV1_COMP *const cpi, ThreadData *td,
                               const TileInfo *const tile, int mi_row,
                               int mi_col, int mi_row_top, int mi_col_top,
                               RUN_TYPE dry_run, BLOCK_SIZE bsize,
                               BLOCK_SIZE top_bsize, uint8_t *dst_buf[3],
                               int dst_stride[3], PC_TREE *pc_tree) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  const int hbs = mi_size_wide[bsize] / 2;
  const int is_partition_root = bsize >= BLOCK_8X8;
  const int ctx = is_partition_root
                      ? partition_plane_context(xd, mi_row, mi_col,
#if CONFIG_UNPOISON_PARTITION_CTX
                                                mi_row + hbs < cm->mi_rows,
                                                mi_col + hbs < cm->mi_cols,
#endif
                                                bsize)
                      : -1;
  const PARTITION_TYPE partition = pc_tree->partitioning;
  const BLOCK_SIZE subsize = get_subsize(bsize, partition);
#if CONFIG_EXT_PARTITION_TYPES
  const BLOCK_SIZE bsize2 = get_subsize(bsize, PARTITION_SPLIT);
#endif

  int i;
  uint8_t *dst_buf1[3], *dst_buf2[3], *dst_buf3[3];
  DECLARE_ALIGNED(16, uint8_t, tmp_buf1[MAX_MB_PLANE * MAX_TX_SQUARE * 2]);
  DECLARE_ALIGNED(16, uint8_t, tmp_buf2[MAX_MB_PLANE * MAX_TX_SQUARE * 2]);
  DECLARE_ALIGNED(16, uint8_t, tmp_buf3[MAX_MB_PLANE * MAX_TX_SQUARE * 2]);
  int dst_stride1[3] = { MAX_TX_SIZE, MAX_TX_SIZE, MAX_TX_SIZE };
  int dst_stride2[3] = { MAX_TX_SIZE, MAX_TX_SIZE, MAX_TX_SIZE };
  int dst_stride3[3] = { MAX_TX_SIZE, MAX_TX_SIZE, MAX_TX_SIZE };
#if CONFIG_CB4X4
  const int unify_bsize = 1;
#else
  const int unify_bsize = 0;
  assert(bsize >= BLOCK_8X8);
#endif

  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) return;

#if CONFIG_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    int len = sizeof(uint16_t);
    dst_buf1[0] = CONVERT_TO_BYTEPTR(tmp_buf1);
    dst_buf1[1] = CONVERT_TO_BYTEPTR(tmp_buf1 + MAX_TX_SQUARE * len);
    dst_buf1[2] = CONVERT_TO_BYTEPTR(tmp_buf1 + 2 * MAX_TX_SQUARE * len);
    dst_buf2[0] = CONVERT_TO_BYTEPTR(tmp_buf2);
    dst_buf2[1] = CONVERT_TO_BYTEPTR(tmp_buf2 + MAX_TX_SQUARE * len);
    dst_buf2[2] = CONVERT_TO_BYTEPTR(tmp_buf2 + 2 * MAX_TX_SQUARE * len);
    dst_buf3[0] = CONVERT_TO_BYTEPTR(tmp_buf3);
    dst_buf3[1] = CONVERT_TO_BYTEPTR(tmp_buf3 + MAX_TX_SQUARE * len);
    dst_buf3[2] = CONVERT_TO_BYTEPTR(tmp_buf3 + 2 * MAX_TX_SQUARE * len);
  } else {
#endif  // CONFIG_HIGHBITDEPTH
    dst_buf1[0] = tmp_buf1;
    dst_buf1[1] = tmp_buf1 + MAX_TX_SQUARE;
    dst_buf1[2] = tmp_buf1 + 2 * MAX_TX_SQUARE;
    dst_buf2[0] = tmp_buf2;
    dst_buf2[1] = tmp_buf2 + MAX_TX_SQUARE;
    dst_buf2[2] = tmp_buf2 + 2 * MAX_TX_SQUARE;
    dst_buf3[0] = tmp_buf3;
    dst_buf3[1] = tmp_buf3 + MAX_TX_SQUARE;
    dst_buf3[2] = tmp_buf3 + 2 * MAX_TX_SQUARE;
#if CONFIG_HIGHBITDEPTH
  }
#endif  // CONFIG_HIGHBITDEPTH

  if (!dry_run && ctx >= 0 && bsize < top_bsize) {
    // Explicitly cast away const.
    FRAME_COUNTS *const frame_counts = (FRAME_COUNTS *)&cm->counts;
    frame_counts->partition[ctx][partition]++;
  }

  for (i = 0; i < MAX_MB_PLANE; i++) {
    xd->plane[i].dst.buf = dst_buf[i];
    xd->plane[i].dst.stride = dst_stride[i];
  }

  switch (partition) {
    case PARTITION_NONE:
      assert(bsize < top_bsize);
      predict_b_extend(cpi, td, tile, 0, mi_row, mi_col, mi_row, mi_col,
                       mi_row_top, mi_col_top, dst_buf, dst_stride, top_bsize,
                       bsize, dry_run, 0, 0);
      extend_all(cpi, td, tile, 0, bsize, top_bsize, mi_row, mi_col, mi_row_top,
                 mi_col_top, dry_run, dst_buf, dst_stride);
      break;
    case PARTITION_HORZ:
      if (bsize == BLOCK_8X8 && !unify_bsize) {
        // Fisrt half
        predict_b_extend(cpi, td, tile, 0, mi_row, mi_col, mi_row, mi_col,
                         mi_row_top, mi_col_top, dst_buf, dst_stride, top_bsize,
                         BLOCK_8X8, dry_run, 1, 0);
        if (bsize < top_bsize)
          extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride);

        // Second half
        predict_b_extend(cpi, td, tile, 2, mi_row, mi_col, mi_row, mi_col,
                         mi_row_top, mi_col_top, dst_buf1, dst_stride1,
                         top_bsize, BLOCK_8X8, dry_run, 1, 1);
        if (bsize < top_bsize)
          extend_all(cpi, td, tile, 2, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf1, dst_stride1);

        // Smooth
        xd->plane[0].dst.buf = dst_buf[0];
        xd->plane[0].dst.stride = dst_stride[0];
        av1_build_masked_inter_predictor_complex(
            xd, dst_buf[0], dst_stride[0], dst_buf1[0], dst_stride1[0], mi_row,
            mi_col, mi_row_top, mi_col_top, bsize, top_bsize, PARTITION_HORZ,
            0);
      } else {
        // First half
        predict_b_extend(cpi, td, tile, 0, mi_row, mi_col, mi_row, mi_col,
                         mi_row_top, mi_col_top, dst_buf, dst_stride, top_bsize,
                         subsize, dry_run, 0, 0);
        if (bsize < top_bsize)
          extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride);
        else
          extend_dir(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride, 0);

        if (mi_row + hbs < cm->mi_rows) {
          // Second half
          predict_b_extend(cpi, td, tile, 0, mi_row + hbs, mi_col, mi_row + hbs,
                           mi_col, mi_row_top, mi_col_top, dst_buf1,
                           dst_stride1, top_bsize, subsize, dry_run, 0, 0);
          if (bsize < top_bsize)
            extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row + hbs,
                       mi_col, mi_row_top, mi_col_top, dry_run, dst_buf1,
                       dst_stride1);
          else
            extend_dir(cpi, td, tile, 0, subsize, top_bsize, mi_row + hbs,
                       mi_col, mi_row_top, mi_col_top, dry_run, dst_buf1,
                       dst_stride1, 1);

          // Smooth
          for (i = 0; i < MAX_MB_PLANE; i++) {
            xd->plane[i].dst.buf = dst_buf[i];
            xd->plane[i].dst.stride = dst_stride[i];
            av1_build_masked_inter_predictor_complex(
                xd, dst_buf[i], dst_stride[i], dst_buf1[i], dst_stride1[i],
                mi_row, mi_col, mi_row_top, mi_col_top, bsize, top_bsize,
                PARTITION_HORZ, i);
          }
        }
      }
      break;
    case PARTITION_VERT:
      if (bsize == BLOCK_8X8 && !unify_bsize) {
        // First half
        predict_b_extend(cpi, td, tile, 0, mi_row, mi_col, mi_row, mi_col,
                         mi_row_top, mi_col_top, dst_buf, dst_stride, top_bsize,
                         BLOCK_8X8, dry_run, 1, 0);
        if (bsize < top_bsize)
          extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride);

        // Second half
        predict_b_extend(cpi, td, tile, 1, mi_row, mi_col, mi_row, mi_col,
                         mi_row_top, mi_col_top, dst_buf1, dst_stride1,
                         top_bsize, BLOCK_8X8, dry_run, 1, 1);
        if (bsize < top_bsize)
          extend_all(cpi, td, tile, 1, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf1, dst_stride1);

        // Smooth
        xd->plane[0].dst.buf = dst_buf[0];
        xd->plane[0].dst.stride = dst_stride[0];
        av1_build_masked_inter_predictor_complex(
            xd, dst_buf[0], dst_stride[0], dst_buf1[0], dst_stride1[0], mi_row,
            mi_col, mi_row_top, mi_col_top, bsize, top_bsize, PARTITION_VERT,
            0);
      } else {
        // bsize: not important, not useful
        predict_b_extend(cpi, td, tile, 0, mi_row, mi_col, mi_row, mi_col,
                         mi_row_top, mi_col_top, dst_buf, dst_stride, top_bsize,
                         subsize, dry_run, 0, 0);
        if (bsize < top_bsize)
          extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride);
        else
          extend_dir(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride, 3);

        if (mi_col + hbs < cm->mi_cols) {
          predict_b_extend(cpi, td, tile, 0, mi_row, mi_col + hbs, mi_row,
                           mi_col + hbs, mi_row_top, mi_col_top, dst_buf1,
                           dst_stride1, top_bsize, subsize, dry_run, 0, 0);
          if (bsize < top_bsize)
            extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row,
                       mi_col + hbs, mi_row_top, mi_col_top, dry_run, dst_buf1,
                       dst_stride1);
          else
            extend_dir(cpi, td, tile, 0, subsize, top_bsize, mi_row,
                       mi_col + hbs, mi_row_top, mi_col_top, dry_run, dst_buf1,
                       dst_stride1, 2);

          for (i = 0; i < MAX_MB_PLANE; i++) {
            xd->plane[i].dst.buf = dst_buf[i];
            xd->plane[i].dst.stride = dst_stride[i];
            av1_build_masked_inter_predictor_complex(
                xd, dst_buf[i], dst_stride[i], dst_buf1[i], dst_stride1[i],
                mi_row, mi_col, mi_row_top, mi_col_top, bsize, top_bsize,
                PARTITION_VERT, i);
          }
        }
      }
      break;
    case PARTITION_SPLIT:
      if (bsize == BLOCK_8X8 && !unify_bsize) {
        predict_b_extend(cpi, td, tile, 0, mi_row, mi_col, mi_row, mi_col,
                         mi_row_top, mi_col_top, dst_buf, dst_stride, top_bsize,
                         BLOCK_8X8, dry_run, 1, 0);
        predict_b_extend(cpi, td, tile, 1, mi_row, mi_col, mi_row, mi_col,
                         mi_row_top, mi_col_top, dst_buf1, dst_stride1,
                         top_bsize, BLOCK_8X8, dry_run, 1, 1);
        predict_b_extend(cpi, td, tile, 2, mi_row, mi_col, mi_row, mi_col,
                         mi_row_top, mi_col_top, dst_buf2, dst_stride2,
                         top_bsize, BLOCK_8X8, dry_run, 1, 1);
        predict_b_extend(cpi, td, tile, 3, mi_row, mi_col, mi_row, mi_col,
                         mi_row_top, mi_col_top, dst_buf3, dst_stride3,
                         top_bsize, BLOCK_8X8, dry_run, 1, 1);

        if (bsize < top_bsize) {
          extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride);
          extend_all(cpi, td, tile, 1, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf1, dst_stride1);
          extend_all(cpi, td, tile, 2, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf2, dst_stride2);
          extend_all(cpi, td, tile, 3, subsize, top_bsize, mi_row, mi_col,
                     mi_row_top, mi_col_top, dry_run, dst_buf3, dst_stride3);
        }
      } else {
        predict_sb_complex(cpi, td, tile, mi_row, mi_col, mi_row_top,
                           mi_col_top, dry_run, subsize, top_bsize, dst_buf,
                           dst_stride, pc_tree->split[0]);
        if (mi_row < cm->mi_rows && mi_col + hbs < cm->mi_cols)
          predict_sb_complex(cpi, td, tile, mi_row, mi_col + hbs, mi_row_top,
                             mi_col_top, dry_run, subsize, top_bsize, dst_buf1,
                             dst_stride1, pc_tree->split[1]);
        if (mi_row + hbs < cm->mi_rows && mi_col < cm->mi_cols)
          predict_sb_complex(cpi, td, tile, mi_row + hbs, mi_col, mi_row_top,
                             mi_col_top, dry_run, subsize, top_bsize, dst_buf2,
                             dst_stride2, pc_tree->split[2]);
        if (mi_row + hbs < cm->mi_rows && mi_col + hbs < cm->mi_cols)
          predict_sb_complex(cpi, td, tile, mi_row + hbs, mi_col + hbs,
                             mi_row_top, mi_col_top, dry_run, subsize,
                             top_bsize, dst_buf3, dst_stride3,
                             pc_tree->split[3]);
      }
      for (i = 0; i < MAX_MB_PLANE; i++) {
#if !CONFIG_CB4X4
        if (bsize == BLOCK_8X8 && i != 0)
          continue;  // Skip <4x4 chroma smoothing
#endif
        if (mi_row < cm->mi_rows && mi_col + hbs < cm->mi_cols) {
          av1_build_masked_inter_predictor_complex(
              xd, dst_buf[i], dst_stride[i], dst_buf1[i], dst_stride1[i],
              mi_row, mi_col, mi_row_top, mi_col_top, bsize, top_bsize,
              PARTITION_VERT, i);
          if (mi_row + hbs < cm->mi_rows) {
            av1_build_masked_inter_predictor_complex(
                xd, dst_buf2[i], dst_stride2[i], dst_buf3[i], dst_stride3[i],
                mi_row, mi_col, mi_row_top, mi_col_top, bsize, top_bsize,
                PARTITION_VERT, i);
            av1_build_masked_inter_predictor_complex(
                xd, dst_buf[i], dst_stride[i], dst_buf2[i], dst_stride2[i],
                mi_row, mi_col, mi_row_top, mi_col_top, bsize, top_bsize,
                PARTITION_HORZ, i);
          }
        } else if (mi_row + hbs < cm->mi_rows && mi_col < cm->mi_cols) {
          if (bsize == BLOCK_8X8 && i != 0)
            continue;  // Skip <4x4 chroma smoothing

          av1_build_masked_inter_predictor_complex(
              xd, dst_buf[i], dst_stride[i], dst_buf2[i], dst_stride2[i],
              mi_row, mi_col, mi_row_top, mi_col_top, bsize, top_bsize,
              PARTITION_HORZ, i);
        }
      }
      break;
#if CONFIG_EXT_PARTITION_TYPES
    case PARTITION_HORZ_A:
      predict_b_extend(cpi, td, tile, 0, mi_row, mi_col, mi_row, mi_col,
                       mi_row_top, mi_col_top, dst_buf, dst_stride, top_bsize,
                       bsize2, dry_run, 0, 0);
      extend_all(cpi, td, tile, 0, bsize2, top_bsize, mi_row, mi_col,
                 mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride);

      predict_b_extend(cpi, td, tile, 0, mi_row, mi_col + hbs, mi_row,
                       mi_col + hbs, mi_row_top, mi_col_top, dst_buf1,
                       dst_stride1, top_bsize, bsize2, dry_run, 0, 0);
      extend_all(cpi, td, tile, 0, bsize2, top_bsize, mi_row, mi_col + hbs,
                 mi_row_top, mi_col_top, dry_run, dst_buf1, dst_stride1);

      predict_b_extend(cpi, td, tile, 0, mi_row + hbs, mi_col, mi_row + hbs,
                       mi_col, mi_row_top, mi_col_top, dst_buf2, dst_stride2,
                       top_bsize, subsize, dry_run, 0, 0);
      if (bsize < top_bsize)
        extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row + hbs, mi_col,
                   mi_row_top, mi_col_top, dry_run, dst_buf2, dst_stride2);
      else
        extend_dir(cpi, td, tile, 0, subsize, top_bsize, mi_row + hbs, mi_col,
                   mi_row_top, mi_col_top, dry_run, dst_buf2, dst_stride2, 1);

      for (i = 0; i < MAX_MB_PLANE; i++) {
        xd->plane[i].dst.buf = dst_buf[i];
        xd->plane[i].dst.stride = dst_stride[i];
        av1_build_masked_inter_predictor_complex(
            xd, dst_buf[i], dst_stride[i], dst_buf1[i], dst_stride1[i], mi_row,
            mi_col, mi_row_top, mi_col_top, bsize, top_bsize, PARTITION_VERT,
            i);
      }
      for (i = 0; i < MAX_MB_PLANE; i++) {
        av1_build_masked_inter_predictor_complex(
            xd, dst_buf[i], dst_stride[i], dst_buf2[i], dst_stride2[i], mi_row,
            mi_col, mi_row_top, mi_col_top, bsize, top_bsize, PARTITION_HORZ,
            i);
      }

      break;
    case PARTITION_VERT_A:

      predict_b_extend(cpi, td, tile, 0, mi_row, mi_col, mi_row, mi_col,
                       mi_row_top, mi_col_top, dst_buf, dst_stride, top_bsize,
                       bsize2, dry_run, 0, 0);
      extend_all(cpi, td, tile, 0, bsize2, top_bsize, mi_row, mi_col,
                 mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride);

      predict_b_extend(cpi, td, tile, 0, mi_row + hbs, mi_col, mi_row + hbs,
                       mi_col, mi_row_top, mi_col_top, dst_buf1, dst_stride1,
                       top_bsize, bsize2, dry_run, 0, 0);
      extend_all(cpi, td, tile, 0, bsize2, top_bsize, mi_row + hbs, mi_col,
                 mi_row_top, mi_col_top, dry_run, dst_buf1, dst_stride1);

      predict_b_extend(cpi, td, tile, 0, mi_row, mi_col + hbs, mi_row,
                       mi_col + hbs, mi_row_top, mi_col_top, dst_buf2,
                       dst_stride2, top_bsize, subsize, dry_run, 0, 0);
      if (bsize < top_bsize)
        extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col + hbs,
                   mi_row_top, mi_col_top, dry_run, dst_buf2, dst_stride2);
      else
        extend_dir(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col + hbs,
                   mi_row_top, mi_col_top, dry_run, dst_buf2, dst_stride2, 2);

      for (i = 0; i < MAX_MB_PLANE; i++) {
        xd->plane[i].dst.buf = dst_buf[i];
        xd->plane[i].dst.stride = dst_stride[i];
        av1_build_masked_inter_predictor_complex(
            xd, dst_buf[i], dst_stride[i], dst_buf1[i], dst_stride1[i], mi_row,
            mi_col, mi_row_top, mi_col_top, bsize, top_bsize, PARTITION_HORZ,
            i);
      }
      for (i = 0; i < MAX_MB_PLANE; i++) {
        av1_build_masked_inter_predictor_complex(
            xd, dst_buf[i], dst_stride[i], dst_buf2[i], dst_stride2[i], mi_row,
            mi_col, mi_row_top, mi_col_top, bsize, top_bsize, PARTITION_VERT,
            i);
      }
      break;
    case PARTITION_HORZ_B:

      predict_b_extend(cpi, td, tile, 0, mi_row, mi_col, mi_row, mi_col,
                       mi_row_top, mi_col_top, dst_buf, dst_stride, top_bsize,
                       subsize, dry_run, 0, 0);
      if (bsize < top_bsize)
        extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                   mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride);
      else
        extend_dir(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                   mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride, 0);

      predict_b_extend(cpi, td, tile, 0, mi_row + hbs, mi_col, mi_row + hbs,
                       mi_col, mi_row_top, mi_col_top, dst_buf1, dst_stride1,
                       top_bsize, bsize2, dry_run, 0, 0);
      extend_all(cpi, td, tile, 0, bsize2, top_bsize, mi_row + hbs, mi_col,
                 mi_row_top, mi_col_top, dry_run, dst_buf1, dst_stride1);

      predict_b_extend(cpi, td, tile, 0, mi_row + hbs, mi_col + hbs,
                       mi_row + hbs, mi_col + hbs, mi_row_top, mi_col_top,
                       dst_buf2, dst_stride2, top_bsize, bsize2, dry_run, 0, 0);
      extend_all(cpi, td, tile, 0, bsize2, top_bsize, mi_row + hbs,
                 mi_col + hbs, mi_row_top, mi_col_top, dry_run, dst_buf2,
                 dst_stride2);

      for (i = 0; i < MAX_MB_PLANE; i++) {
        xd->plane[i].dst.buf = dst_buf1[i];
        xd->plane[i].dst.stride = dst_stride1[i];
        av1_build_masked_inter_predictor_complex(
            xd, dst_buf1[i], dst_stride1[i], dst_buf2[i], dst_stride2[i],
            mi_row, mi_col, mi_row_top, mi_col_top, bsize, top_bsize,
            PARTITION_VERT, i);
      }
      for (i = 0; i < MAX_MB_PLANE; i++) {
        xd->plane[i].dst.buf = dst_buf[i];
        xd->plane[i].dst.stride = dst_stride[i];
        av1_build_masked_inter_predictor_complex(
            xd, dst_buf[i], dst_stride[i], dst_buf1[i], dst_stride1[i], mi_row,
            mi_col, mi_row_top, mi_col_top, bsize, top_bsize, PARTITION_HORZ,
            i);
      }
      break;
    case PARTITION_VERT_B:

      predict_b_extend(cpi, td, tile, 0, mi_row, mi_col, mi_row, mi_col,
                       mi_row_top, mi_col_top, dst_buf, dst_stride, top_bsize,
                       subsize, dry_run, 0, 0);
      if (bsize < top_bsize)
        extend_all(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                   mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride);
      else
        extend_dir(cpi, td, tile, 0, subsize, top_bsize, mi_row, mi_col,
                   mi_row_top, mi_col_top, dry_run, dst_buf, dst_stride, 3);

      predict_b_extend(cpi, td, tile, 0, mi_row, mi_col + hbs, mi_row,
                       mi_col + hbs, mi_row_top, mi_col_top, dst_buf1,
                       dst_stride1, top_bsize, bsize2, dry_run, 0, 0);
      extend_all(cpi, td, tile, 0, bsize2, top_bsize, mi_row, mi_col + hbs,
                 mi_row_top, mi_col_top, dry_run, dst_buf1, dst_stride1);

      predict_b_extend(cpi, td, tile, 0, mi_row + hbs, mi_col + hbs,
                       mi_row + hbs, mi_col + hbs, mi_row_top, mi_col_top,
                       dst_buf2, dst_stride2, top_bsize, bsize2, dry_run, 0, 0);
      extend_all(cpi, td, tile, 0, bsize2, top_bsize, mi_row + hbs,
                 mi_col + hbs, mi_row_top, mi_col_top, dry_run, dst_buf2,
                 dst_stride2);

      for (i = 0; i < MAX_MB_PLANE; i++) {
        xd->plane[i].dst.buf = dst_buf1[i];
        xd->plane[i].dst.stride = dst_stride1[i];
        av1_build_masked_inter_predictor_complex(
            xd, dst_buf1[i], dst_stride1[i], dst_buf2[i], dst_stride2[i],
            mi_row, mi_col, mi_row_top, mi_col_top, bsize, top_bsize,
            PARTITION_HORZ, i);
      }
      for (i = 0; i < MAX_MB_PLANE; i++) {
        xd->plane[i].dst.buf = dst_buf[i];
        xd->plane[i].dst.stride = dst_stride[i];
        av1_build_masked_inter_predictor_complex(
            xd, dst_buf[i], dst_stride[i], dst_buf1[i], dst_stride1[i], mi_row,
            mi_col, mi_row_top, mi_col_top, bsize, top_bsize, PARTITION_VERT,
            i);
      }
      break;
#endif  // CONFIG_EXT_PARTITION_TYPES
    default: assert(0);
  }

#if CONFIG_EXT_PARTITION_TYPES
  if (bsize < top_bsize)
    update_ext_partition_context(xd, mi_row, mi_col, subsize, bsize, partition);
#else
  if (bsize < top_bsize && (partition != PARTITION_SPLIT || bsize == BLOCK_8X8))
    update_partition_context(xd, mi_row, mi_col, subsize, bsize);
#endif  // CONFIG_EXT_PARTITION_TYPES
}

static void rd_supertx_sb(const AV1_COMP *const cpi, ThreadData *td,
                          const TileInfo *const tile, int mi_row, int mi_col,
                          BLOCK_SIZE bsize, int *tmp_rate, int64_t *tmp_dist,
                          TX_TYPE *best_tx, PC_TREE *pc_tree) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCK *const x = &td->mb;
  MACROBLOCKD *const xd = &x->e_mbd;
  int plane, pnskip, skippable, skippable_uv, rate_uv, this_rate,
      base_rate = *tmp_rate;
  int64_t sse, pnsse, sse_uv, this_dist, dist_uv;
  uint8_t *dst_buf[3];
  int dst_stride[3];
  TX_SIZE tx_size;
  MB_MODE_INFO *mbmi;
  TX_TYPE tx_type, best_tx_nostx;
#if CONFIG_EXT_TX
  int ext_tx_set;
#endif  // CONFIG_EXT_TX
  int tmp_rate_tx = 0, skip_tx = 0;
  int64_t tmp_dist_tx = 0, rd_tx, bestrd_tx = INT64_MAX;

  set_skip_context(xd, mi_row, mi_col);
  set_mode_info_offsets(cpi, x, xd, mi_row, mi_col);
  update_state_sb_supertx(cpi, td, tile, mi_row, mi_col, bsize, 1, pc_tree);
  av1_setup_dst_planes(xd->plane, bsize, get_frame_new_buffer(cm), mi_row,
                       mi_col);
  for (plane = 0; plane < MAX_MB_PLANE; plane++) {
    dst_buf[plane] = xd->plane[plane].dst.buf;
    dst_stride[plane] = xd->plane[plane].dst.stride;
  }
  predict_sb_complex(cpi, td, tile, mi_row, mi_col, mi_row, mi_col, 1, bsize,
                     bsize, dst_buf, dst_stride, pc_tree);

  set_offsets_without_segment_id(cpi, tile, x, mi_row, mi_col, bsize);
  set_segment_id_supertx(cpi, x, mi_row, mi_col, bsize);

  mbmi = &xd->mi[0]->mbmi;
  best_tx_nostx = mbmi->tx_type;

  *best_tx = DCT_DCT;

  // chroma
  skippable_uv = 1;
  rate_uv = 0;
  dist_uv = 0;
  sse_uv = 0;
  for (plane = 1; plane < MAX_MB_PLANE; ++plane) {
#if CONFIG_VAR_TX
    ENTROPY_CONTEXT ctxa[2 * MAX_MIB_SIZE];
    ENTROPY_CONTEXT ctxl[2 * MAX_MIB_SIZE];
    const struct macroblockd_plane *const pd = &xd->plane[plane];
    RD_STATS this_rd_stats;
    av1_init_rd_stats(&this_rd_stats);

    tx_size = max_txsize_lookup[bsize];
    tx_size =
        uv_txsize_lookup[bsize][tx_size][cm->subsampling_x][cm->subsampling_y];
    av1_get_entropy_contexts(bsize, tx_size, pd, ctxa, ctxl);

    av1_subtract_plane(x, bsize, plane);
    av1_tx_block_rd_b(cpi, x, tx_size, 0, 0, plane, 0,
                      get_plane_block_size(bsize, pd), &ctxa[0], &ctxl[0],
                      &this_rd_stats);

    this_rate = this_rd_stats.rate;
    this_dist = this_rd_stats.dist;
    pnsse = this_rd_stats.sse;
    pnskip = this_rd_stats.skip;
#else
    tx_size = max_txsize_lookup[bsize];
    tx_size =
        uv_txsize_lookup[bsize][tx_size][cm->subsampling_x][cm->subsampling_y];
    av1_subtract_plane(x, bsize, plane);
    av1_txfm_rd_in_plane_supertx(x, cpi, &this_rate, &this_dist, &pnskip,
                                 &pnsse, INT64_MAX, plane, bsize, tx_size, 0);
#endif  // CONFIG_VAR_TX

    rate_uv += this_rate;
    dist_uv += this_dist;
    sse_uv += pnsse;
    skippable_uv &= pnskip;
  }

  // luma
  tx_size = max_txsize_lookup[bsize];
  av1_subtract_plane(x, bsize, 0);
#if CONFIG_EXT_TX
  ext_tx_set = get_ext_tx_set(tx_size, bsize, 1, cm->reduced_tx_set_used);
#endif  // CONFIG_EXT_TX
  for (tx_type = DCT_DCT; tx_type < TX_TYPES; ++tx_type) {
#if CONFIG_VAR_TX
    ENTROPY_CONTEXT ctxa[2 * MAX_MIB_SIZE];
    ENTROPY_CONTEXT ctxl[2 * MAX_MIB_SIZE];
    const struct macroblockd_plane *const pd = &xd->plane[0];
    RD_STATS this_rd_stats;
#endif  // CONFIG_VAR_TX

#if CONFIG_EXT_TX
    if (!ext_tx_used_inter[ext_tx_set][tx_type]) continue;
#else
    if (tx_size >= TX_32X32 && tx_type != DCT_DCT) continue;
#endif  // CONFIG_EXT_TX
    mbmi->tx_type = tx_type;

#if CONFIG_VAR_TX
    av1_init_rd_stats(&this_rd_stats);
    av1_get_entropy_contexts(bsize, tx_size, pd, ctxa, ctxl);
    av1_tx_block_rd_b(cpi, x, tx_size, 0, 0, 0, 0, bsize, &ctxa[0], &ctxl[0],
                      &this_rd_stats);

    this_rate = this_rd_stats.rate;
    this_dist = this_rd_stats.dist;
    pnsse = this_rd_stats.sse;
    pnskip = this_rd_stats.skip;
#else
    av1_txfm_rd_in_plane_supertx(x, cpi, &this_rate, &this_dist, &pnskip,
                                 &pnsse, INT64_MAX, 0, bsize, tx_size, 0);
#endif  // CONFIG_VAR_TX

#if CONFIG_EXT_TX
    if (get_ext_tx_types(tx_size, bsize, 1, cm->reduced_tx_set_used) > 1 &&
        !xd->lossless[xd->mi[0]->mbmi.segment_id] && this_rate != INT_MAX) {
      if (ext_tx_set > 0)
        this_rate +=
            cpi->inter_tx_type_costs[ext_tx_set][mbmi->tx_size][mbmi->tx_type];
    }
#else
    if (tx_size < TX_32X32 && !xd->lossless[xd->mi[0]->mbmi.segment_id] &&
        this_rate != INT_MAX) {
      this_rate += cpi->inter_tx_type_costs[tx_size][mbmi->tx_type];
    }
#endif  // CONFIG_EXT_TX
    *tmp_rate = rate_uv + this_rate;
    *tmp_dist = dist_uv + this_dist;
    sse = sse_uv + pnsse;
    skippable = skippable_uv && pnskip;
    if (skippable) {
      *tmp_rate = av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
      x->skip = 1;
    } else {
      if (RDCOST(x->rdmult, x->rddiv, *tmp_rate, *tmp_dist) <
          RDCOST(x->rdmult, x->rddiv, 0, sse)) {
        *tmp_rate += av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
        x->skip = 0;
      } else {
        *tmp_dist = sse;
        *tmp_rate = av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
        x->skip = 1;
      }
    }
    *tmp_rate += base_rate;
    rd_tx = RDCOST(x->rdmult, x->rddiv, *tmp_rate, *tmp_dist);
    if (rd_tx < bestrd_tx * 0.99 || tx_type == DCT_DCT) {
      *best_tx = tx_type;
      bestrd_tx = rd_tx;
      tmp_rate_tx = *tmp_rate;
      tmp_dist_tx = *tmp_dist;
      skip_tx = x->skip;
    }
  }
  *tmp_rate = tmp_rate_tx;
  *tmp_dist = tmp_dist_tx;
  x->skip = skip_tx;
#if CONFIG_VAR_TX
  for (plane = 0; plane < 1; ++plane)
    memset(x->blk_skip[plane], x->skip,
           sizeof(uint8_t) * pc_tree->none.num_4x4_blk);
#endif  // CONFIG_VAR_TX
  xd->mi[0]->mbmi.tx_type = best_tx_nostx;
}
#endif  // CONFIG_SUPERTX