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

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

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

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

#include "av1/common/common.h"
#include "av1/common/common_data.h"
#include "av1/common/entropy.h"
#include "av1/common/entropymode.h"
#include "av1/common/idct.h"
#include "av1/common/mvref_common.h"
#include "av1/common/pred_common.h"
#include "av1/common/quant_common.h"
#include "av1/common/reconinter.h"
#include "av1/common/reconintra.h"
#include "av1/common/scan.h"
#include "av1/common/seg_common.h"
#if CONFIG_WARPED_MOTION
#include "av1/common/warped_motion.h"
#endif  // CONFIG_WARPED_MOTION

#include "av1/encoder/aq_variance.h"
#include "av1/encoder/av1_quantize.h"
#include "av1/encoder/cost.h"
#include "av1/encoder/encodemb.h"
#include "av1/encoder/encodemv.h"
#include "av1/encoder/encoder.h"
#include "av1/encoder/hybrid_fwd_txfm.h"
#include "av1/encoder/mcomp.h"
#if CONFIG_PALETTE
#include "av1/encoder/palette.h"
#endif  // CONFIG_PALETTE
#include "av1/encoder/ratectrl.h"
#include "av1/encoder/rd.h"
#include "av1/encoder/rdopt.h"
#include "av1/encoder/tokenize.h"
#if CONFIG_PVQ
#include "av1/encoder/pvq_encoder.h"
#endif
#if CONFIG_PVQ || CONFIG_DAALA_DIST
#include "av1/common/pvq.h"
#endif
#if CONFIG_DUAL_FILTER
#define DUAL_FILTER_SET_SIZE (SWITCHABLE_FILTERS * SWITCHABLE_FILTERS)
static const int filter_sets[DUAL_FILTER_SET_SIZE][2] = {
  { 0, 0 }, { 0, 1 }, { 0, 2 }, { 0, 3 }, { 1, 0 }, { 1, 1 },
  { 1, 2 }, { 1, 3 }, { 2, 0 }, { 2, 1 }, { 2, 2 }, { 2, 3 },
  { 3, 0 }, { 3, 1 }, { 3, 2 }, { 3, 3 },
};
#endif  // CONFIG_DUAL_FILTER

#if CONFIG_EXT_REFS

#define LAST_FRAME_MODE_MASK                                      \
  ((1 << INTRA_FRAME) | (1 << LAST2_FRAME) | (1 << LAST3_FRAME) | \
   (1 << GOLDEN_FRAME) | (1 << BWDREF_FRAME) | (1 << ALTREF_FRAME))
#define LAST2_FRAME_MODE_MASK                                    \
  ((1 << INTRA_FRAME) | (1 << LAST_FRAME) | (1 << LAST3_FRAME) | \
   (1 << GOLDEN_FRAME) | (1 << BWDREF_FRAME) | (1 << ALTREF_FRAME))
#define LAST3_FRAME_MODE_MASK                                    \
  ((1 << INTRA_FRAME) | (1 << LAST_FRAME) | (1 << LAST2_FRAME) | \
   (1 << GOLDEN_FRAME) | (1 << BWDREF_FRAME) | (1 << ALTREF_FRAME))
#define GOLDEN_FRAME_MODE_MASK                                   \
  ((1 << INTRA_FRAME) | (1 << LAST_FRAME) | (1 << LAST2_FRAME) | \
   (1 << LAST3_FRAME) | (1 << BWDREF_FRAME) | (1 << ALTREF_FRAME))
#define BWDREF_FRAME_MODE_MASK                                   \
  ((1 << INTRA_FRAME) | (1 << LAST_FRAME) | (1 << LAST2_FRAME) | \
   (1 << LAST3_FRAME) | (1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME))
#define ALTREF_FRAME_MODE_MASK                                   \
  ((1 << INTRA_FRAME) | (1 << LAST_FRAME) | (1 << LAST2_FRAME) | \
   (1 << LAST3_FRAME) | (1 << GOLDEN_FRAME) | (1 << BWDREF_FRAME))

#else

#define LAST_FRAME_MODE_MASK \
  ((1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME) | (1 << INTRA_FRAME))
#define GOLDEN_FRAME_MODE_MASK \
  ((1 << LAST_FRAME) | (1 << ALTREF_FRAME) | (1 << INTRA_FRAME))
#define ALTREF_FRAME_MODE_MASK \
  ((1 << LAST_FRAME) | (1 << GOLDEN_FRAME) | (1 << INTRA_FRAME))

#endif  // CONFIG_EXT_REFS

#if CONFIG_EXT_REFS
#define SECOND_REF_FRAME_MASK ((1 << ALTREF_FRAME) | (1 << BWDREF_FRAME) | 0x01)
#else
#define SECOND_REF_FRAME_MASK ((1 << ALTREF_FRAME) | 0x01)
#endif  // CONFIG_EXT_REFS

#define MIN_EARLY_TERM_INDEX 3
#define NEW_MV_DISCOUNT_FACTOR 8

#if CONFIG_EXT_INTRA
#define ANGLE_SKIP_THRESH 10
#define FILTER_FAST_SEARCH 1
#endif  // CONFIG_EXT_INTRA

const double ADST_FLIP_SVM[8] = { -6.6623, -2.8062, -3.2531, 3.1671,    // vert
                                  -7.7051, -3.2234, -3.6193, 3.4533 };  // horz

typedef struct {
  PREDICTION_MODE mode;
  MV_REFERENCE_FRAME ref_frame[2];
} MODE_DEFINITION;

typedef struct { MV_REFERENCE_FRAME ref_frame[2]; } REF_DEFINITION;

struct rdcost_block_args {
  const AV1_COMP *cpi;
  MACROBLOCK *x;
  ENTROPY_CONTEXT t_above[2 * MAX_MIB_SIZE];
  ENTROPY_CONTEXT t_left[2 * MAX_MIB_SIZE];
  RD_STATS rd_stats;
  int64_t this_rd;
  int64_t best_rd;
  int exit_early;
  int use_fast_coef_costing;
  const SCAN_ORDER *scan_order;
};

#define LAST_NEW_MV_INDEX 6
static const MODE_DEFINITION av1_mode_order[MAX_MODES] = {
  { NEARESTMV, { LAST_FRAME, NONE_FRAME } },
#if CONFIG_EXT_REFS
  { NEARESTMV, { LAST2_FRAME, NONE_FRAME } },
  { NEARESTMV, { LAST3_FRAME, NONE_FRAME } },
  { NEARESTMV, { BWDREF_FRAME, NONE_FRAME } },
#endif  // CONFIG_EXT_REFS
  { NEARESTMV, { ALTREF_FRAME, NONE_FRAME } },
  { NEARESTMV, { GOLDEN_FRAME, NONE_FRAME } },

  { DC_PRED, { INTRA_FRAME, NONE_FRAME } },

  { NEWMV, { LAST_FRAME, NONE_FRAME } },
#if CONFIG_EXT_REFS
  { NEWMV, { LAST2_FRAME, NONE_FRAME } },
  { NEWMV, { LAST3_FRAME, NONE_FRAME } },
  { NEWMV, { BWDREF_FRAME, NONE_FRAME } },
#endif  // CONFIG_EXT_REFS
  { NEWMV, { ALTREF_FRAME, NONE_FRAME } },
  { NEWMV, { GOLDEN_FRAME, NONE_FRAME } },

  { NEARMV, { LAST_FRAME, NONE_FRAME } },
#if CONFIG_EXT_REFS
  { NEARMV, { LAST2_FRAME, NONE_FRAME } },
  { NEARMV, { LAST3_FRAME, NONE_FRAME } },
  { NEARMV, { BWDREF_FRAME, NONE_FRAME } },
#endif  // CONFIG_EXT_REFS
  { NEARMV, { ALTREF_FRAME, NONE_FRAME } },
  { NEARMV, { GOLDEN_FRAME, NONE_FRAME } },

#if CONFIG_EXT_INTER
  { NEWFROMNEARMV, { LAST_FRAME, NONE_FRAME } },
#if CONFIG_EXT_REFS
  { NEWFROMNEARMV, { LAST2_FRAME, NONE_FRAME } },
  { NEWFROMNEARMV, { LAST3_FRAME, NONE_FRAME } },
  { NEWFROMNEARMV, { BWDREF_FRAME, NONE_FRAME } },
#endif  // CONFIG_EXT_REFS
  { NEWFROMNEARMV, { ALTREF_FRAME, NONE_FRAME } },
  { NEWFROMNEARMV, { GOLDEN_FRAME, NONE_FRAME } },
#endif  // CONFIG_EXT_INTER

  { ZEROMV, { LAST_FRAME, NONE_FRAME } },
#if CONFIG_EXT_REFS
  { ZEROMV, { LAST2_FRAME, NONE_FRAME } },
  { ZEROMV, { LAST3_FRAME, NONE_FRAME } },
  { ZEROMV, { BWDREF_FRAME, NONE_FRAME } },
#endif  // CONFIG_EXT_REFS
  { ZEROMV, { GOLDEN_FRAME, NONE_FRAME } },
  { ZEROMV, { ALTREF_FRAME, NONE_FRAME } },

// TODO(zoeliu): May need to reconsider the order on the modes to check

#if CONFIG_EXT_INTER
  { NEAREST_NEARESTMV, { LAST_FRAME, ALTREF_FRAME } },
#if CONFIG_EXT_REFS
  { NEAREST_NEARESTMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEAREST_NEARESTMV, { LAST3_FRAME, ALTREF_FRAME } },
#endif  // CONFIG_EXT_REFS
  { NEAREST_NEARESTMV, { GOLDEN_FRAME, ALTREF_FRAME } },
#if CONFIG_EXT_REFS
  { NEAREST_NEARESTMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEAREST_NEARESTMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEAREST_NEARESTMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEAREST_NEARESTMV, { GOLDEN_FRAME, BWDREF_FRAME } },
#endif  // CONFIG_EXT_REFS

#else  // CONFIG_EXT_INTER

  { NEARESTMV, { LAST_FRAME, ALTREF_FRAME } },
#if CONFIG_EXT_REFS
  { NEARESTMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEARESTMV, { LAST3_FRAME, ALTREF_FRAME } },
#endif  // CONFIG_EXT_REFS
  { NEARESTMV, { GOLDEN_FRAME, ALTREF_FRAME } },
#if CONFIG_EXT_REFS
  { NEARESTMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEARESTMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEARESTMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEARESTMV, { GOLDEN_FRAME, BWDREF_FRAME } },
#endif  // CONFIG_EXT_REFS
#endif  // CONFIG_EXT_INTER

  { TM_PRED, { INTRA_FRAME, NONE_FRAME } },

#if CONFIG_ALT_INTRA
  { SMOOTH_PRED, { INTRA_FRAME, NONE_FRAME } },
#endif  // CONFIG_ALT_INTRA

#if CONFIG_EXT_INTER
  { NEAR_NEARESTMV, { LAST_FRAME, ALTREF_FRAME } },
  { NEAREST_NEARMV, { LAST_FRAME, ALTREF_FRAME } },
  { NEAR_NEARMV, { LAST_FRAME, ALTREF_FRAME } },
  { NEW_NEARESTMV, { LAST_FRAME, ALTREF_FRAME } },
  { NEAREST_NEWMV, { LAST_FRAME, ALTREF_FRAME } },
  { NEW_NEARMV, { LAST_FRAME, ALTREF_FRAME } },
  { NEAR_NEWMV, { LAST_FRAME, ALTREF_FRAME } },
  { NEW_NEWMV, { LAST_FRAME, ALTREF_FRAME } },
  { ZERO_ZEROMV, { LAST_FRAME, ALTREF_FRAME } },

#if CONFIG_EXT_REFS
  { NEAR_NEARESTMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEAREST_NEARMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEAR_NEARMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEW_NEARESTMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEAREST_NEWMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEW_NEARMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEAR_NEWMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEW_NEWMV, { LAST2_FRAME, ALTREF_FRAME } },
  { ZERO_ZEROMV, { LAST2_FRAME, ALTREF_FRAME } },

  { NEAR_NEARESTMV, { LAST3_FRAME, ALTREF_FRAME } },
  { NEAREST_NEARMV, { LAST3_FRAME, ALTREF_FRAME } },
  { NEAR_NEARMV, { LAST3_FRAME, ALTREF_FRAME } },
  { NEW_NEARESTMV, { LAST3_FRAME, ALTREF_FRAME } },
  { NEAREST_NEWMV, { LAST3_FRAME, ALTREF_FRAME } },
  { NEW_NEARMV, { LAST3_FRAME, ALTREF_FRAME } },
  { NEAR_NEWMV, { LAST3_FRAME, ALTREF_FRAME } },
  { NEW_NEWMV, { LAST3_FRAME, ALTREF_FRAME } },
  { ZERO_ZEROMV, { LAST3_FRAME, ALTREF_FRAME } },
#endif  // CONFIG_EXT_REFS

  { NEAR_NEARESTMV, { GOLDEN_FRAME, ALTREF_FRAME } },
  { NEAREST_NEARMV, { GOLDEN_FRAME, ALTREF_FRAME } },
  { NEAR_NEARMV, { GOLDEN_FRAME, ALTREF_FRAME } },
  { NEW_NEARESTMV, { GOLDEN_FRAME, ALTREF_FRAME } },
  { NEAREST_NEWMV, { GOLDEN_FRAME, ALTREF_FRAME } },
  { NEW_NEARMV, { GOLDEN_FRAME, ALTREF_FRAME } },
  { NEAR_NEWMV, { GOLDEN_FRAME, ALTREF_FRAME } },
  { NEW_NEWMV, { GOLDEN_FRAME, ALTREF_FRAME } },
  { ZERO_ZEROMV, { GOLDEN_FRAME, ALTREF_FRAME } },

#if CONFIG_EXT_REFS
  { NEAR_NEARESTMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEAREST_NEARMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEAR_NEARMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEW_NEARESTMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEAREST_NEWMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEW_NEARMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEAR_NEWMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEW_NEWMV, { LAST_FRAME, BWDREF_FRAME } },
  { ZERO_ZEROMV, { LAST_FRAME, BWDREF_FRAME } },

  { NEAR_NEARESTMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEAREST_NEARMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEAR_NEARMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEW_NEARESTMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEAREST_NEWMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEW_NEARMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEAR_NEWMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEW_NEWMV, { LAST2_FRAME, BWDREF_FRAME } },
  { ZERO_ZEROMV, { LAST2_FRAME, BWDREF_FRAME } },

  { NEAR_NEARESTMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEAREST_NEARMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEAR_NEARMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEW_NEARESTMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEAREST_NEWMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEW_NEARMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEAR_NEWMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEW_NEWMV, { LAST3_FRAME, BWDREF_FRAME } },
  { ZERO_ZEROMV, { LAST3_FRAME, BWDREF_FRAME } },

  { NEAR_NEARESTMV, { GOLDEN_FRAME, BWDREF_FRAME } },
  { NEAREST_NEARMV, { GOLDEN_FRAME, BWDREF_FRAME } },
  { NEAR_NEARMV, { GOLDEN_FRAME, BWDREF_FRAME } },
  { NEW_NEARESTMV, { GOLDEN_FRAME, BWDREF_FRAME } },
  { NEAREST_NEWMV, { GOLDEN_FRAME, BWDREF_FRAME } },
  { NEW_NEARMV, { GOLDEN_FRAME, BWDREF_FRAME } },
  { NEAR_NEWMV, { GOLDEN_FRAME, BWDREF_FRAME } },
  { NEW_NEWMV, { GOLDEN_FRAME, BWDREF_FRAME } },
  { ZERO_ZEROMV, { GOLDEN_FRAME, BWDREF_FRAME } },
#endif  // CONFIG_EXT_REFS

#else  // CONFIG_EXT_INTER

  { NEARMV, { LAST_FRAME, ALTREF_FRAME } },
  { NEWMV, { LAST_FRAME, ALTREF_FRAME } },
#if CONFIG_EXT_REFS
  { NEARMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEWMV, { LAST2_FRAME, ALTREF_FRAME } },
  { NEARMV, { LAST3_FRAME, ALTREF_FRAME } },
  { NEWMV, { LAST3_FRAME, ALTREF_FRAME } },
#endif  // CONFIG_EXT_REFS
  { NEARMV, { GOLDEN_FRAME, ALTREF_FRAME } },
  { NEWMV, { GOLDEN_FRAME, ALTREF_FRAME } },

#if CONFIG_EXT_REFS
  { NEARMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEWMV, { LAST_FRAME, BWDREF_FRAME } },
  { NEARMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEWMV, { LAST2_FRAME, BWDREF_FRAME } },
  { NEARMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEWMV, { LAST3_FRAME, BWDREF_FRAME } },
  { NEARMV, { GOLDEN_FRAME, BWDREF_FRAME } },
  { NEWMV, { GOLDEN_FRAME, BWDREF_FRAME } },
#endif  // CONFIG_EXT_REFS

  { ZEROMV, { LAST_FRAME, ALTREF_FRAME } },
#if CONFIG_EXT_REFS
  { ZEROMV, { LAST2_FRAME, ALTREF_FRAME } },
  { ZEROMV, { LAST3_FRAME, ALTREF_FRAME } },
#endif  // CONFIG_EXT_REFS
  { ZEROMV, { GOLDEN_FRAME, ALTREF_FRAME } },

#if CONFIG_EXT_REFS
  { ZEROMV, { LAST_FRAME, BWDREF_FRAME } },
  { ZEROMV, { LAST2_FRAME, BWDREF_FRAME } },
  { ZEROMV, { LAST3_FRAME, BWDREF_FRAME } },
  { ZEROMV, { GOLDEN_FRAME, BWDREF_FRAME } },
#endif  // CONFIG_EXT_REFS

#endif  // CONFIG_EXT_INTER

  { H_PRED, { INTRA_FRAME, NONE_FRAME } },
  { V_PRED, { INTRA_FRAME, NONE_FRAME } },
  { D135_PRED, { INTRA_FRAME, NONE_FRAME } },
  { D207_PRED, { INTRA_FRAME, NONE_FRAME } },
  { D153_PRED, { INTRA_FRAME, NONE_FRAME } },
  { D63_PRED, { INTRA_FRAME, NONE_FRAME } },
  { D117_PRED, { INTRA_FRAME, NONE_FRAME } },
  { D45_PRED, { INTRA_FRAME, NONE_FRAME } },

#if CONFIG_EXT_INTER
  { ZEROMV, { LAST_FRAME, INTRA_FRAME } },
  { NEARESTMV, { LAST_FRAME, INTRA_FRAME } },
  { NEARMV, { LAST_FRAME, INTRA_FRAME } },
  { NEWMV, { LAST_FRAME, INTRA_FRAME } },

#if CONFIG_EXT_REFS
  { ZEROMV, { LAST2_FRAME, INTRA_FRAME } },
  { NEARESTMV, { LAST2_FRAME, INTRA_FRAME } },
  { NEARMV, { LAST2_FRAME, INTRA_FRAME } },
  { NEWMV, { LAST2_FRAME, INTRA_FRAME } },

  { ZEROMV, { LAST3_FRAME, INTRA_FRAME } },
  { NEARESTMV, { LAST3_FRAME, INTRA_FRAME } },
  { NEARMV, { LAST3_FRAME, INTRA_FRAME } },
  { NEWMV, { LAST3_FRAME, INTRA_FRAME } },
#endif  // CONFIG_EXT_REFS

  { ZEROMV, { GOLDEN_FRAME, INTRA_FRAME } },
  { NEARESTMV, { GOLDEN_FRAME, INTRA_FRAME } },
  { NEARMV, { GOLDEN_FRAME, INTRA_FRAME } },
  { NEWMV, { GOLDEN_FRAME, INTRA_FRAME } },

#if CONFIG_EXT_REFS
  { ZEROMV, { BWDREF_FRAME, INTRA_FRAME } },
  { NEARESTMV, { BWDREF_FRAME, INTRA_FRAME } },
  { NEARMV, { BWDREF_FRAME, INTRA_FRAME } },
  { NEWMV, { BWDREF_FRAME, INTRA_FRAME } },
#endif  // CONFIG_EXT_REFS

  { ZEROMV, { ALTREF_FRAME, INTRA_FRAME } },
  { NEARESTMV, { ALTREF_FRAME, INTRA_FRAME } },
  { NEARMV, { ALTREF_FRAME, INTRA_FRAME } },
  { NEWMV, { ALTREF_FRAME, INTRA_FRAME } },
#endif  // CONFIG_EXT_INTER
};

static const REF_DEFINITION av1_ref_order[MAX_REFS] = {
  { { LAST_FRAME, NONE_FRAME } },
#if CONFIG_EXT_REFS
  { { LAST2_FRAME, NONE_FRAME } },    { { LAST3_FRAME, NONE_FRAME } },
  { { BWDREF_FRAME, NONE_FRAME } },
#endif  // CONFIG_EXT_REFS
  { { GOLDEN_FRAME, NONE_FRAME } },   { { ALTREF_FRAME, NONE_FRAME } },

  { { LAST_FRAME, ALTREF_FRAME } },
#if CONFIG_EXT_REFS
  { { LAST2_FRAME, ALTREF_FRAME } },  { { LAST3_FRAME, ALTREF_FRAME } },
#endif  // CONFIG_EXT_REFS
  { { GOLDEN_FRAME, ALTREF_FRAME } },

#if CONFIG_EXT_REFS
  { { LAST_FRAME, BWDREF_FRAME } },   { { LAST2_FRAME, BWDREF_FRAME } },
  { { LAST3_FRAME, BWDREF_FRAME } },  { { GOLDEN_FRAME, BWDREF_FRAME } },
#endif  // CONFIG_EXT_REFS

  { { INTRA_FRAME, NONE_FRAME } },
};

#if CONFIG_EXT_INTRA || CONFIG_FILTER_INTRA || CONFIG_PALETTE
static INLINE int write_uniform_cost(int n, int v) {
  int l = get_unsigned_bits(n), m = (1 << l) - n;
  if (l == 0) return 0;
  if (v < m)
    return (l - 1) * av1_cost_bit(128, 0);
  else
    return l * av1_cost_bit(128, 0);
}
#endif  // CONFIG_EXT_INTRA || CONFIG_FILTER_INTRA || CONFIG_PALETTE

// constants for prune 1 and prune 2 decision boundaries
#define FAST_EXT_TX_CORR_MID 0.0
#define FAST_EXT_TX_EDST_MID 0.1
#define FAST_EXT_TX_CORR_MARGIN 0.5
#define FAST_EXT_TX_EDST_MARGIN 0.3

static const TX_TYPE_1D vtx_tab[TX_TYPES] = {
  DCT_1D,      ADST_1D, DCT_1D,      ADST_1D,
#if CONFIG_EXT_TX
  FLIPADST_1D, DCT_1D,  FLIPADST_1D, ADST_1D, FLIPADST_1D, IDTX_1D,
  DCT_1D,      IDTX_1D, ADST_1D,     IDTX_1D, FLIPADST_1D, IDTX_1D,
#endif  // CONFIG_EXT_TX
};

static const TX_TYPE_1D htx_tab[TX_TYPES] = {
  DCT_1D,  DCT_1D,      ADST_1D,     ADST_1D,
#if CONFIG_EXT_TX
  DCT_1D,  FLIPADST_1D, FLIPADST_1D, FLIPADST_1D, ADST_1D, IDTX_1D,
  IDTX_1D, DCT_1D,      IDTX_1D,     ADST_1D,     IDTX_1D, FLIPADST_1D,
#endif  // CONFIG_EXT_TX
};

#if CONFIG_DAALA_DIST
static int od_compute_var_4x4(od_coeff *x, int stride) {
  int sum;
  int s2;
  int i;
  sum = 0;
  s2 = 0;
  for (i = 0; i < 4; i++) {
    int j;
    for (j = 0; j < 4; j++) {
      int t;

      t = x[i * stride + j];
      sum += t;
      s2 += t * t;
    }
  }
  // TODO(yushin) : Check wheter any changes are required for high bit depth.
  return (s2 - (sum * sum >> 4)) >> 4;
}

/* OD_DIST_LP_MID controls the frequency weighting filter used for computing
   the distortion. For a value X, the filter is [1 X 1]/(X + 2) and
   is applied both horizontally and vertically. For X=5, the filter is
   a good approximation for the OD_QM8_Q4_HVS quantization matrix. */
#define OD_DIST_LP_MID (5)
#define OD_DIST_LP_NORM (OD_DIST_LP_MID + 2)

static double od_compute_dist_8x8(int qm, int use_activity_masking, od_coeff *x,
                                  od_coeff *y, od_coeff *e_lp, int stride) {
  double sum;
  int min_var;
  double mean_var;
  double var_stat;
  double activity;
  double calibration;
  int i;
  int j;
  double vardist;

  vardist = 0;
  OD_ASSERT(qm != OD_FLAT_QM);
#if 1
  min_var = INT_MAX;
  mean_var = 0;
  for (i = 0; i < 3; i++) {
    for (j = 0; j < 3; j++) {
      int varx;
      int vary;
      varx = od_compute_var_4x4(x + 2 * i * stride + 2 * j, stride);
      vary = od_compute_var_4x4(y + 2 * i * stride + 2 * j, stride);
      min_var = OD_MINI(min_var, varx);
      mean_var += 1. / (1 + varx);
      /* The cast to (double) is to avoid an overflow before the sqrt.*/
      vardist += varx - 2 * sqrt(varx * (double)vary) + vary;
    }
  }
  /* We use a different variance statistic depending on whether activity
     masking is used, since the harmonic mean appeared slghtly worse with
     masking off. The calibration constant just ensures that we preserve the
     rate compared to activity=1. */
  if (use_activity_masking) {
    calibration = 1.95;
    var_stat = 9. / mean_var;
  } else {
    calibration = 1.62;
    var_stat = min_var;
  }
  /* 1.62 is a calibration constant, 0.25 is a noise floor and 1/6 is the
     activity masking constant. */
  activity = calibration * pow(.25 + var_stat, -1. / 6);
#else
  activity = 1;
#endif
  sum = 0;
  for (i = 0; i < 8; i++) {
    for (j = 0; j < 8; j++)
      sum += e_lp[i * stride + j] * (double)e_lp[i * stride + j];
  }
  /* Normalize the filter to unit DC response. */
  sum *= 1. / (OD_DIST_LP_NORM * OD_DIST_LP_NORM * OD_DIST_LP_NORM *
               OD_DIST_LP_NORM);
  return activity * activity * (sum + vardist);
}

// Note : Inputs x and y are in a pixel domain
static double od_compute_dist(int qm, int activity_masking, od_coeff *x,
                              od_coeff *y, int bsize_w, int bsize_h,
                              int qindex) {
  int i;
  double sum;
  sum = 0;

  assert(bsize_w >= 8 && bsize_h >= 8);

  if (qm == OD_FLAT_QM) {
    for (i = 0; i < bsize_w * bsize_h; i++) {
      double tmp;
      tmp = x[i] - y[i];
      sum += tmp * tmp;
    }
  } else {
    int j;
    DECLARE_ALIGNED(16, od_coeff, e[MAX_TX_SQUARE]);
    DECLARE_ALIGNED(16, od_coeff, tmp[MAX_TX_SQUARE]);
    DECLARE_ALIGNED(16, od_coeff, e_lp[MAX_TX_SQUARE]);
    int mid = OD_DIST_LP_MID;
    for (i = 0; i < bsize_h; i++) {
      for (j = 0; j < bsize_w; j++) {
        e[i * bsize_w + j] = x[i * bsize_w + j] - y[i * bsize_w + j];
      }
    }
    for (i = 0; i < bsize_h; i++) {
      tmp[i * bsize_w] = mid * e[i * bsize_w] + 2 * e[i * bsize_w + 1];
      tmp[i * bsize_w + bsize_w - 1] =
          mid * e[i * bsize_w + bsize_w - 1] + 2 * e[i * bsize_w + bsize_w - 2];
      for (j = 1; j < bsize_w - 1; j++) {
        tmp[i * bsize_w + j] = mid * e[i * bsize_w + j] +
                               e[i * bsize_w + j - 1] + e[i * bsize_w + j + 1];
      }
    }
    for (j = 0; j < bsize_w; j++) {
      e_lp[j] = mid * tmp[j] + 2 * tmp[bsize_w + j];
      e_lp[(bsize_h - 1) * bsize_w + j] =
          mid * tmp[(bsize_h - 1) * bsize_w + j] +
          2 * tmp[(bsize_h - 2) * bsize_w + j];
    }
    for (i = 1; i < bsize_h - 1; i++) {
      for (j = 0; j < bsize_w; j++) {
        e_lp[i * bsize_w + j] = mid * tmp[i * bsize_w + j] +
                                tmp[(i - 1) * bsize_w + j] +
                                tmp[(i + 1) * bsize_w + j];
      }
    }
    for (i = 0; i < bsize_h; i += 8) {
      for (j = 0; j < bsize_w; j += 8) {
        sum += od_compute_dist_8x8(qm, activity_masking, &x[i * bsize_w + j],
                                   &y[i * bsize_w + j], &e_lp[i * bsize_w + j],
                                   bsize_w);
      }
    }
    /* Scale according to linear regression against SSE, for 8x8 blocks. */
    if (activity_masking) {
      sum *= 2.2 + (1.7 - 2.2) * (qindex - 99) / (210 - 99) +
             (qindex < 99 ? 2.5 * (qindex - 99) / 99 * (qindex - 99) / 99 : 0);
    } else {
      sum *= qindex >= 128
                 ? 1.4 + (0.9 - 1.4) * (qindex - 128) / (209 - 128)
                 : qindex <= 43
                       ? 1.5 + (2.0 - 1.5) * (qindex - 43) / (16 - 43)
                       : 1.5 + (1.4 - 1.5) * (qindex - 43) / (128 - 43);
    }
  }
  return sum;
}

static int64_t av1_daala_dist(const uint8_t *src, int src_stride,
                              const uint8_t *dst, int dst_stride, int tx_size,
                              int qm, int use_activity_masking, int qindex) {
  int i, j;
  int64_t d;
  const BLOCK_SIZE tx_bsize = txsize_to_bsize[tx_size];
  const int bsw = block_size_wide[tx_bsize];
  const int bsh = block_size_high[tx_bsize];
  DECLARE_ALIGNED(16, od_coeff, orig[MAX_TX_SQUARE]);
  DECLARE_ALIGNED(16, od_coeff, rec[MAX_TX_SQUARE]);

  assert(qm == OD_HVS_QM);

  for (j = 0; j < bsh; j++)
    for (i = 0; i < bsw; i++) orig[j * bsw + i] = src[j * src_stride + i];

  for (j = 0; j < bsh; j++)
    for (i = 0; i < bsw; i++) rec[j * bsw + i] = dst[j * dst_stride + i];

  d = (int64_t)od_compute_dist(qm, use_activity_masking, orig, rec, bsw, bsh,
                               qindex);
  return d;
}
#endif  // #if CONFIG_DAALA_DIST

static void get_energy_distribution_fine(const AV1_COMP *cpi, BLOCK_SIZE bsize,
                                         uint8_t *src, int src_stride,
                                         uint8_t *dst, int dst_stride,
                                         double *hordist, double *verdist) {
  int bw = block_size_wide[bsize];
  int bh = block_size_high[bsize];
  unsigned int esq[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
  unsigned int var[16];
  double total = 0;

  const int f_index = bsize - BLOCK_16X16;
  if (f_index < 0) {
    int i, j, index;
    int w_shift = bw == 8 ? 1 : 2;
    int h_shift = bh == 8 ? 1 : 2;
#if CONFIG_AOM_HIGHBITDEPTH
    if (cpi->common.use_highbitdepth) {
      uint16_t *src16 = CONVERT_TO_SHORTPTR(src);
      uint16_t *dst16 = CONVERT_TO_SHORTPTR(dst);
      for (i = 0; i < bh; ++i)
        for (j = 0; j < bw; ++j) {
          index = (j >> w_shift) + ((i >> h_shift) << 2);
          esq[index] +=
              (src16[j + i * src_stride] - dst16[j + i * dst_stride]) *
              (src16[j + i * src_stride] - dst16[j + i * dst_stride]);
        }
    } else {
#endif  // CONFIG_AOM_HIGHBITDEPTH

      for (i = 0; i < bh; ++i)
        for (j = 0; j < bw; ++j) {
          index = (j >> w_shift) + ((i >> h_shift) << 2);
          esq[index] += (src[j + i * src_stride] - dst[j + i * dst_stride]) *
                        (src[j + i * src_stride] - dst[j + i * dst_stride]);
        }
#if CONFIG_AOM_HIGHBITDEPTH
    }
#endif  // CONFIG_AOM_HIGHBITDEPTH
  } else {
    var[0] = cpi->fn_ptr[f_index].vf(src, src_stride, dst, dst_stride, &esq[0]);
    var[1] = cpi->fn_ptr[f_index].vf(src + bw / 4, src_stride, dst + bw / 4,
                                     dst_stride, &esq[1]);
    var[2] = cpi->fn_ptr[f_index].vf(src + bw / 2, src_stride, dst + bw / 2,
                                     dst_stride, &esq[2]);
    var[3] = cpi->fn_ptr[f_index].vf(src + 3 * bw / 4, src_stride,
                                     dst + 3 * bw / 4, dst_stride, &esq[3]);
    src += bh / 4 * src_stride;
    dst += bh / 4 * dst_stride;

    var[4] = cpi->fn_ptr[f_index].vf(src, src_stride, dst, dst_stride, &esq[4]);
    var[5] = cpi->fn_ptr[f_index].vf(src + bw / 4, src_stride, dst + bw / 4,
                                     dst_stride, &esq[5]);
    var[6] = cpi->fn_ptr[f_index].vf(src + bw / 2, src_stride, dst + bw / 2,
                                     dst_stride, &esq[6]);
    var[7] = cpi->fn_ptr[f_index].vf(src + 3 * bw / 4, src_stride,
                                     dst + 3 * bw / 4, dst_stride, &esq[7]);
    src += bh / 4 * src_stride;
    dst += bh / 4 * dst_stride;

    var[8] = cpi->fn_ptr[f_index].vf(src, src_stride, dst, dst_stride, &esq[8]);
    var[9] = cpi->fn_ptr[f_index].vf(src + bw / 4, src_stride, dst + bw / 4,
                                     dst_stride, &esq[9]);
    var[10] = cpi->fn_ptr[f_index].vf(src + bw / 2, src_stride, dst + bw / 2,
                                      dst_stride, &esq[10]);
    var[11] = cpi->fn_ptr[f_index].vf(src + 3 * bw / 4, src_stride,
                                      dst + 3 * bw / 4, dst_stride, &esq[11]);
    src += bh / 4 * src_stride;
    dst += bh / 4 * dst_stride;

    var[12] =
        cpi->fn_ptr[f_index].vf(src, src_stride, dst, dst_stride, &esq[12]);
    var[13] = cpi->fn_ptr[f_index].vf(src + bw / 4, src_stride, dst + bw / 4,
                                      dst_stride, &esq[13]);
    var[14] = cpi->fn_ptr[f_index].vf(src + bw / 2, src_stride, dst + bw / 2,
                                      dst_stride, &esq[14]);
    var[15] = cpi->fn_ptr[f_index].vf(src + 3 * bw / 4, src_stride,
                                      dst + 3 * bw / 4, dst_stride, &esq[15]);
  }

  total = esq[0] + esq[1] + esq[2] + esq[3] + esq[4] + esq[5] + esq[6] +
          esq[7] + esq[8] + esq[9] + esq[10] + esq[11] + esq[12] + esq[13] +
          esq[14] + esq[15];
  if (total > 0) {
    const double e_recip = 1.0 / total;
    hordist[0] =
        ((double)esq[0] + (double)esq[4] + (double)esq[8] + (double)esq[12]) *
        e_recip;
    hordist[1] =
        ((double)esq[1] + (double)esq[5] + (double)esq[9] + (double)esq[13]) *
        e_recip;
    hordist[2] =
        ((double)esq[2] + (double)esq[6] + (double)esq[10] + (double)esq[14]) *
        e_recip;
    verdist[0] =
        ((double)esq[0] + (double)esq[1] + (double)esq[2] + (double)esq[3]) *
        e_recip;
    verdist[1] =
        ((double)esq[4] + (double)esq[5] + (double)esq[6] + (double)esq[7]) *
        e_recip;
    verdist[2] =
        ((double)esq[8] + (double)esq[9] + (double)esq[10] + (double)esq[11]) *
        e_recip;
  } else {
    hordist[0] = verdist[0] = 0.25;
    hordist[1] = verdist[1] = 0.25;
    hordist[2] = verdist[2] = 0.25;
  }
  (void)var[0];
  (void)var[1];
  (void)var[2];
  (void)var[3];
  (void)var[4];
  (void)var[5];
  (void)var[6];
  (void)var[7];
  (void)var[8];
  (void)var[9];
  (void)var[10];
  (void)var[11];
  (void)var[12];
  (void)var[13];
  (void)var[14];
  (void)var[15];
}

static int adst_vs_flipadst(const AV1_COMP *cpi, BLOCK_SIZE bsize, uint8_t *src,
                            int src_stride, uint8_t *dst, int dst_stride,
                            double *hdist, double *vdist) {
  int prune_bitmask = 0;
  double svm_proj_h = 0, svm_proj_v = 0;
  get_energy_distribution_fine(cpi, bsize, src, src_stride, dst, dst_stride,
                               hdist, vdist);

  svm_proj_v = vdist[0] * ADST_FLIP_SVM[0] + vdist[1] * ADST_FLIP_SVM[1] +
               vdist[2] * ADST_FLIP_SVM[2] + ADST_FLIP_SVM[3];
  svm_proj_h = hdist[0] * ADST_FLIP_SVM[4] + hdist[1] * ADST_FLIP_SVM[5] +
               hdist[2] * ADST_FLIP_SVM[6] + ADST_FLIP_SVM[7];
  if (svm_proj_v > FAST_EXT_TX_EDST_MID + FAST_EXT_TX_EDST_MARGIN)
    prune_bitmask |= 1 << FLIPADST_1D;
  else if (svm_proj_v < FAST_EXT_TX_EDST_MID - FAST_EXT_TX_EDST_MARGIN)
    prune_bitmask |= 1 << ADST_1D;

  if (svm_proj_h > FAST_EXT_TX_EDST_MID + FAST_EXT_TX_EDST_MARGIN)
    prune_bitmask |= 1 << (FLIPADST_1D + 8);
  else if (svm_proj_h < FAST_EXT_TX_EDST_MID - FAST_EXT_TX_EDST_MARGIN)
    prune_bitmask |= 1 << (ADST_1D + 8);

  return prune_bitmask;
}

#if CONFIG_EXT_TX
static void get_horver_correlation(int16_t *diff, int stride, int w, int h,
                                   double *hcorr, double *vcorr) {
  // Returns hor/ver correlation coefficient
  const int num = (h - 1) * (w - 1);
  double num_r;
  int i, j;
  int64_t xy_sum = 0, xz_sum = 0;
  int64_t x_sum = 0, y_sum = 0, z_sum = 0;
  int64_t x2_sum = 0, y2_sum = 0, z2_sum = 0;
  double x_var_n, y_var_n, z_var_n, xy_var_n, xz_var_n;
  *hcorr = *vcorr = 1;

  assert(num > 0);
  num_r = 1.0 / num;
  for (i = 1; i < h; ++i) {
    for (j = 1; j < w; ++j) {
      const int16_t x = diff[i * stride + j];
      const int16_t y = diff[i * stride + j - 1];
      const int16_t z = diff[(i - 1) * stride + j];
      xy_sum += x * y;
      xz_sum += x * z;
      x_sum += x;
      y_sum += y;
      z_sum += z;
      x2_sum += x * x;
      y2_sum += y * y;
      z2_sum += z * z;
    }
  }
  x_var_n = x2_sum - (x_sum * x_sum) * num_r;
  y_var_n = y2_sum - (y_sum * y_sum) * num_r;
  z_var_n = z2_sum - (z_sum * z_sum) * num_r;
  xy_var_n = xy_sum - (x_sum * y_sum) * num_r;
  xz_var_n = xz_sum - (x_sum * z_sum) * num_r;
  if (x_var_n > 0 && y_var_n > 0) {
    *hcorr = xy_var_n / sqrt(x_var_n * y_var_n);
    *hcorr = *hcorr < 0 ? 0 : *hcorr;
  }
  if (x_var_n > 0 && z_var_n > 0) {
    *vcorr = xz_var_n / sqrt(x_var_n * z_var_n);
    *vcorr = *vcorr < 0 ? 0 : *vcorr;
  }
}

int dct_vs_idtx(int16_t *diff, int stride, int w, int h, double *hcorr,
                double *vcorr) {
  int prune_bitmask = 0;
  get_horver_correlation(diff, stride, w, h, hcorr, vcorr);

  if (*vcorr > FAST_EXT_TX_CORR_MID + FAST_EXT_TX_CORR_MARGIN)
    prune_bitmask |= 1 << IDTX_1D;
  else if (*vcorr < FAST_EXT_TX_CORR_MID - FAST_EXT_TX_CORR_MARGIN)
    prune_bitmask |= 1 << DCT_1D;

  if (*hcorr > FAST_EXT_TX_CORR_MID + FAST_EXT_TX_CORR_MARGIN)
    prune_bitmask |= 1 << (IDTX_1D + 8);
  else if (*hcorr < FAST_EXT_TX_CORR_MID - FAST_EXT_TX_CORR_MARGIN)
    prune_bitmask |= 1 << (DCT_1D + 8);
  return prune_bitmask;
}

// Performance drop: 0.5%, Speed improvement: 24%
static int prune_two_for_sby(const AV1_COMP *cpi, BLOCK_SIZE bsize,
                             MACROBLOCK *x, MACROBLOCKD *xd, int adst_flipadst,
                             int dct_idtx) {
  struct macroblock_plane *const p = &x->plane[0];
  struct macroblockd_plane *const pd = &xd->plane[0];
  const BLOCK_SIZE bs = get_plane_block_size(bsize, pd);
  const int bw = 4 << (b_width_log2_lookup[bs]);
  const int bh = 4 << (b_height_log2_lookup[bs]);
  double hdist[3] = { 0, 0, 0 }, vdist[3] = { 0, 0, 0 };
  double hcorr, vcorr;
  int prune = 0;
  av1_subtract_plane(x, bsize, 0);

  if (adst_flipadst)
    prune |= adst_vs_flipadst(cpi, bsize, p->src.buf, p->src.stride,
                              pd->dst.buf, pd->dst.stride, hdist, vdist);
  if (dct_idtx) prune |= dct_vs_idtx(p->src_diff, bw, bw, bh, &hcorr, &vcorr);

  return prune;
}
#endif  // CONFIG_EXT_TX

// Performance drop: 0.3%, Speed improvement: 5%
static int prune_one_for_sby(const AV1_COMP *cpi, BLOCK_SIZE bsize,
                             MACROBLOCK *x, MACROBLOCKD *xd) {
  struct macroblock_plane *const p = &x->plane[0];
  struct macroblockd_plane *const pd = &xd->plane[0];
  double hdist[3] = { 0, 0, 0 }, vdist[3] = { 0, 0, 0 };
  av1_subtract_plane(x, bsize, 0);
  return adst_vs_flipadst(cpi, bsize, p->src.buf, p->src.stride, pd->dst.buf,
                          pd->dst.stride, hdist, vdist);
}

static int prune_tx_types(const AV1_COMP *cpi, BLOCK_SIZE bsize, MACROBLOCK *x,
                          MACROBLOCKD *xd, int tx_set) {
#if CONFIG_EXT_TX
  const int *tx_set_1D = ext_tx_used_inter_1D[tx_set];
#else
  const int tx_set_1D[TX_TYPES_1D] = { 0 };
#endif

  switch (cpi->sf.tx_type_search.prune_mode) {
    case NO_PRUNE: return 0; break;
    case PRUNE_ONE:
      if ((tx_set >= 0) && !(tx_set_1D[FLIPADST_1D] & tx_set_1D[ADST_1D]))
        return 0;
      return prune_one_for_sby(cpi, bsize, x, xd);
      break;
#if CONFIG_EXT_TX
    case PRUNE_TWO:
      if ((tx_set >= 0) && !(tx_set_1D[FLIPADST_1D] & tx_set_1D[ADST_1D])) {
        if (!(tx_set_1D[DCT_1D] & tx_set_1D[IDTX_1D])) return 0;
        return prune_two_for_sby(cpi, bsize, x, xd, 0, 1);
      }
      if ((tx_set >= 0) && !(tx_set_1D[DCT_1D] & tx_set_1D[IDTX_1D]))
        return prune_two_for_sby(cpi, bsize, x, xd, 1, 0);
      return prune_two_for_sby(cpi, bsize, x, xd, 1, 1);
      break;
#endif
  }
  assert(0);
  return 0;
}

static int do_tx_type_search(TX_TYPE tx_type, int prune) {
// TODO(sarahparker) implement for non ext tx
#if CONFIG_EXT_TX
  return !(((prune >> vtx_tab[tx_type]) & 1) |
           ((prune >> (htx_tab[tx_type] + 8)) & 1));
#else
  // temporary to avoid compiler warnings
  (void)vtx_tab;
  (void)htx_tab;
  (void)tx_type;
  (void)prune;
  return 1;
#endif
}

static void model_rd_from_sse(const AV1_COMP *const cpi,
                              const MACROBLOCKD *const xd, BLOCK_SIZE bsize,
                              int plane, int64_t sse, int *rate,
                              int64_t *dist) {
  const struct macroblockd_plane *const pd = &xd->plane[plane];
  const int dequant_shift =
#if CONFIG_AOM_HIGHBITDEPTH
      (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) ? xd->bd - 5 :
#endif  // CONFIG_AOM_HIGHBITDEPTH
                                                    3;

  // Fast approximate the modelling function.
  if (cpi->sf.simple_model_rd_from_var) {
    const int64_t square_error = sse;
    int quantizer = (pd->dequant[1] >> dequant_shift);

    if (quantizer < 120)
      *rate = (int)((square_error * (280 - quantizer)) >>
                    (16 - AV1_PROB_COST_SHIFT));
    else
      *rate = 0;
    *dist = (square_error * quantizer) >> 8;
  } else {
    av1_model_rd_from_var_lapndz(sse, num_pels_log2_lookup[bsize],
                                 pd->dequant[1] >> dequant_shift, rate, dist);
  }

  *dist <<= 4;
}

static void model_rd_for_sb(const AV1_COMP *const cpi, BLOCK_SIZE bsize,
                            MACROBLOCK *x, MACROBLOCKD *xd, int plane_from,
                            int plane_to, int *out_rate_sum,
                            int64_t *out_dist_sum, int *skip_txfm_sb,
                            int64_t *skip_sse_sb) {
  // Note our transform coeffs are 8 times an orthogonal transform.
  // Hence quantizer step is also 8 times. To get effective quantizer
  // we need to divide by 8 before sending to modeling function.
  int plane;
  const int ref = xd->mi[0]->mbmi.ref_frame[0];

  int64_t rate_sum = 0;
  int64_t dist_sum = 0;
  int64_t total_sse = 0;

  x->pred_sse[ref] = 0;

  for (plane = plane_from; plane <= plane_to; ++plane) {
    struct macroblock_plane *const p = &x->plane[plane];
    struct macroblockd_plane *const pd = &xd->plane[plane];
    const BLOCK_SIZE bs = get_plane_block_size(bsize, pd);

    unsigned int sse;
    int rate;
    int64_t dist;

    // TODO(geza): Write direct sse functions that do not compute
    // variance as well.
    cpi->fn_ptr[bs].vf(p->src.buf, p->src.stride, pd->dst.buf, pd->dst.stride,
                       &sse);

    if (plane == 0) x->pred_sse[ref] = sse;

    total_sse += sse;

    model_rd_from_sse(cpi, xd, bs, plane, sse, &rate, &dist);

    rate_sum += rate;
    dist_sum += dist;
  }

  *skip_txfm_sb = total_sse == 0;
  *skip_sse_sb = total_sse << 4;
  *out_rate_sum = (int)rate_sum;
  *out_dist_sum = dist_sum;
}

#if CONFIG_PVQ
// Without PVQ, av1_block_error_c() return two kind of errors,
// 1) reconstruction (i.e. decoded) error and
// 2) Squared sum of transformed residue (i.e. 'coeff')
// However, if PVQ is enabled, coeff does not keep the transformed residue
// but instead a transformed original is kept.
// Hence, new parameter ref vector (i.e. transformed predicted signal)
// is required to derive the residue signal,
// i.e. coeff - ref = residue (all transformed).

// TODO(yushin) : Since 4x4 case does not need ssz, better to refactor into
// a separate function that does not do the extra computations for ssz.
static int64_t av1_block_error2_c(const tran_low_t *coeff,
                                  const tran_low_t *dqcoeff,
                                  const tran_low_t *ref, intptr_t block_size,
                                  int64_t *ssz) {
  int64_t error;

  // Use the existing sse codes for calculating distortion of decoded signal:
  // i.e. (orig - decoded)^2
  error = av1_block_error_fp(coeff, dqcoeff, block_size);
  // prediction residue^2 = (orig - ref)^2
  *ssz = av1_block_error_fp(coeff, ref, block_size);

  return error;
}
#endif

int64_t av1_block_error_c(const tran_low_t *coeff, const tran_low_t *dqcoeff,
                          intptr_t block_size, int64_t *ssz) {
  int i;
  int64_t error = 0, sqcoeff = 0;

  for (i = 0; i < block_size; i++) {
    const int diff = coeff[i] - dqcoeff[i];
    error += diff * diff;
    sqcoeff += coeff[i] * coeff[i];
  }

  *ssz = sqcoeff;
  return error;
}

int64_t av1_block_error_fp_c(const int16_t *coeff, const int16_t *dqcoeff,
                             int block_size) {
  int i;
  int64_t error = 0;

  for (i = 0; i < block_size; i++) {
    const int diff = coeff[i] - dqcoeff[i];
    error += diff * diff;
  }

  return error;
}

#if CONFIG_AOM_HIGHBITDEPTH
int64_t av1_highbd_block_error_c(const tran_low_t *coeff,
                                 const tran_low_t *dqcoeff, intptr_t block_size,
                                 int64_t *ssz, int bd) {
  int i;
  int64_t error = 0, sqcoeff = 0;
  int shift = 2 * (bd - 8);
  int rounding = shift > 0 ? 1 << (shift - 1) : 0;

  for (i = 0; i < block_size; i++) {
    const int64_t diff = coeff[i] - dqcoeff[i];
    error += diff * diff;
    sqcoeff += (int64_t)coeff[i] * (int64_t)coeff[i];
  }
  assert(error >= 0 && sqcoeff >= 0);
  error = (error + rounding) >> shift;
  sqcoeff = (sqcoeff + rounding) >> shift;

  *ssz = sqcoeff;
  return error;
}
#endif  // CONFIG_AOM_HIGHBITDEPTH

#if !CONFIG_PVQ
/* The trailing '0' is a terminator which is used inside av1_cost_coeffs() to
 * decide whether to include cost of a trailing EOB node or not (i.e. we
 * can skip this if the last coefficient in this transform block, e.g. the
 * 16th coefficient in a 4x4 block or the 64th coefficient in a 8x8 block,
 * were non-zero). */
int av1_cost_coeffs(const AV1_COMMON *const cm, MACROBLOCK *x, int plane,
                    int block, int coeff_ctx, TX_SIZE tx_size,
                    const int16_t *scan, const int16_t *nb,
                    int use_fast_coef_costing) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  const struct macroblock_plane *p = &x->plane[plane];
  const struct macroblockd_plane *pd = &xd->plane[plane];
  const PLANE_TYPE type = pd->plane_type;
  const uint16_t *band_count = &band_count_table[tx_size][1];
  const int eob = p->eobs[block];
  const tran_low_t *const qcoeff = BLOCK_OFFSET(p->qcoeff, block);
  const int tx_size_ctx = txsize_sqr_map[tx_size];
  unsigned int(*token_costs)[2][COEFF_CONTEXTS][ENTROPY_TOKENS] =
      x->token_costs[tx_size_ctx][type][is_inter_block(mbmi)];
  uint8_t token_cache[MAX_TX_SQUARE];
  int pt = coeff_ctx;
  int c, cost;
#if CONFIG_NEW_TOKENSET
  const int ref = is_inter_block(mbmi);
  aom_prob *blockz_probs =
      cm->fc->blockzero_probs[txsize_sqr_map[tx_size]][type][ref];
#endif

#if CONFIG_AOM_HIGHBITDEPTH
  const int *cat6_high_cost = av1_get_high_cost_table(xd->bd);
#else
  const int *cat6_high_cost = av1_get_high_cost_table(8);
#endif

#if !CONFIG_VAR_TX && !CONFIG_SUPERTX
  // Check for consistency of tx_size with mode info
  assert(type == PLANE_TYPE_Y ? mbmi->tx_size == tx_size
                              : get_uv_tx_size(mbmi, pd) == tx_size);
#endif  // !CONFIG_VAR_TX && !CONFIG_SUPERTX
  (void)cm;

  if (eob == 0) {
#if CONFIG_NEW_TOKENSET
    // single eob token
    cost = av1_cost_bit(blockz_probs[pt], 0);
#else
    cost = token_costs[0][0][pt][EOB_TOKEN];
#endif
  } else {
    if (use_fast_coef_costing) {
      int band_left = *band_count++;

      // dc token
      int v = qcoeff[0];
      int16_t prev_t;
      cost = av1_get_token_cost(v, &prev_t, cat6_high_cost);
      cost += (*token_costs)[0][pt][prev_t];

      token_cache[0] = av1_pt_energy_class[prev_t];
      ++token_costs;

      // ac tokens
      for (c = 1; c < eob; c++) {
        const int rc = scan[c];
        int16_t t;

        v = qcoeff[rc];
        cost += av1_get_token_cost(v, &t, cat6_high_cost);
        cost += (*token_costs)[!prev_t][!prev_t][t];
        prev_t = t;
        if (!--band_left) {
          band_left = *band_count++;
          ++token_costs;
        }
      }

      // eob token
      if (band_left) cost += (*token_costs)[0][!prev_t][EOB_TOKEN];

    } else {  // !use_fast_coef_costing
      int band_left = *band_count++;

      // dc token
      int v = qcoeff[0];
      int16_t tok;
      unsigned int(*tok_cost_ptr)[COEFF_CONTEXTS][ENTROPY_TOKENS];
      cost = av1_get_token_cost(v, &tok, cat6_high_cost);
      cost += (*token_costs)[0][pt][tok];

      token_cache[0] = av1_pt_energy_class[tok];
      ++token_costs;

      tok_cost_ptr = &((*token_costs)[!tok]);

      // ac tokens
      for (c = 1; c < eob; c++) {
        const int rc = scan[c];

        v = qcoeff[rc];
        cost += av1_get_token_cost(v, &tok, cat6_high_cost);
        pt = get_coef_context(nb, token_cache, c);
        cost += (*tok_cost_ptr)[pt][tok];
        token_cache[rc] = av1_pt_energy_class[tok];
        if (!--band_left) {
          band_left = *band_count++;
          ++token_costs;
        }
        tok_cost_ptr = &((*token_costs)[!tok]);
      }

      // eob token
      if (band_left) {
        pt = get_coef_context(nb, token_cache, c);
        cost += (*token_costs)[0][pt][EOB_TOKEN];
      }
    }
  }

  return cost;
}
#endif

static void dist_block(const AV1_COMP *cpi, MACROBLOCK *x, int plane, int block,
                       int blk_row, int blk_col, TX_SIZE tx_size,
                       int64_t *out_dist, int64_t *out_sse) {
  MACROBLOCKD *const xd = &x->e_mbd;
  const struct macroblock_plane *const p = &x->plane[plane];
  const struct macroblockd_plane *const pd = &xd->plane[plane];
#if CONFIG_DAALA_DIST
  int qm = OD_HVS_QM;
  int use_activity_masking = 0;
#if CONFIG_PVQ
  use_activity_masking = x->daala_enc.use_activity_masking;
#endif
#endif

  if (cpi->sf.use_transform_domain_distortion && !CONFIG_DAALA_DIST) {
    // Transform domain distortion computation is more accurate as it does
    // not involve an inverse transform, but it is less accurate.
    const int buffer_length = tx_size_2d[tx_size];
    int64_t this_sse;
    int shift = (MAX_TX_SCALE - get_tx_scale(tx_size)) * 2;
    tran_low_t *const coeff = BLOCK_OFFSET(p->coeff, block);
    tran_low_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
#if CONFIG_PVQ
    tran_low_t *ref_coeff = BLOCK_OFFSET(pd->pvq_ref_coeff, block);
#endif
#if CONFIG_AOM_HIGHBITDEPTH
    const int bd = (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) ? xd->bd : 8;
    *out_dist =
        av1_highbd_block_error(coeff, dqcoeff, buffer_length, &this_sse, bd) >>
        shift;
#elif CONFIG_PVQ
    *out_dist = av1_block_error2_c(coeff, dqcoeff, ref_coeff, buffer_length,
                                   &this_sse) >>
                shift;
#else
    *out_dist =
        av1_block_error(coeff, dqcoeff, buffer_length, &this_sse) >> shift;
#endif  // CONFIG_AOM_HIGHBITDEPTH
    *out_sse = this_sse >> shift;
  } else {
    const BLOCK_SIZE tx_bsize = txsize_to_bsize[tx_size];
    const int bsw = block_size_wide[tx_bsize];
    const int bsh = block_size_high[tx_bsize];
    const int src_stride = x->plane[plane].src.stride;
    const int dst_stride = xd->plane[plane].dst.stride;
    // Scale the transform block index to pixel unit.
    const int src_idx = (blk_row * src_stride + blk_col)
                        << tx_size_wide_log2[0];
    const int dst_idx = (blk_row * dst_stride + blk_col)
                        << tx_size_wide_log2[0];
    const uint8_t *src = &x->plane[plane].src.buf[src_idx];
    const uint8_t *dst = &xd->plane[plane].dst.buf[dst_idx];
    const tran_low_t *dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
    const uint16_t eob = p->eobs[block];

    unsigned int tmp;

    assert(cpi != NULL);
    assert(tx_size_wide_log2[0] == tx_size_high_log2[0]);

#if CONFIG_DAALA_DIST
    if (plane == 0) {
      if (bsw >= 8 && bsh >= 8)
        tmp = av1_daala_dist(src, src_stride, dst, dst_stride, tx_size, qm,
                             use_activity_masking, x->qindex);
      else
        tmp = 0;
    } else
#endif
      cpi->fn_ptr[tx_bsize].vf(src, src_stride, dst, dst_stride, &tmp);

    *out_sse = (int64_t)tmp * 16;

    if (eob) {
      const MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
#if CONFIG_AOM_HIGHBITDEPTH
      DECLARE_ALIGNED(16, uint16_t, recon16[MAX_TX_SQUARE]);
      uint8_t *recon = (uint8_t *)recon16;
#else
      DECLARE_ALIGNED(16, uint8_t, recon[MAX_TX_SQUARE]);
#endif  // CONFIG_AOM_HIGHBITDEPTH

      const PLANE_TYPE plane_type = plane == 0 ? PLANE_TYPE_Y : PLANE_TYPE_UV;

      INV_TXFM_PARAM inv_txfm_param;
      const int block_raster_idx =
          av1_block_index_to_raster_order(tx_size, block);

      inv_txfm_param.tx_type =
          get_tx_type(plane_type, xd, block_raster_idx, tx_size);
      inv_txfm_param.tx_size = tx_size;
      inv_txfm_param.eob = eob;
      inv_txfm_param.lossless = xd->lossless[mbmi->segment_id];

#if CONFIG_AOM_HIGHBITDEPTH
      if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
        recon = CONVERT_TO_BYTEPTR(recon);
        inv_txfm_param.bd = xd->bd;
        aom_highbd_convolve_copy(dst, dst_stride, recon, MAX_TX_SIZE, NULL, 0,
                                 NULL, 0, bsw, bsh, xd->bd);
        highbd_inv_txfm_add(dqcoeff, recon, MAX_TX_SIZE, &inv_txfm_param);
      } else
#endif  // CONFIG_AOM_HIGHBITDEPTH
      {
#if !CONFIG_PVQ
        aom_convolve_copy(dst, dst_stride, recon, MAX_TX_SIZE, NULL, 0, NULL, 0,
                          bsw, bsh);
#else
        int i, j;

        for (j = 0; j < bsh; j++)
          for (i = 0; i < bsw; i++) recon[j * MAX_TX_SIZE + i] = 0;
#endif
        inv_txfm_add(dqcoeff, recon, MAX_TX_SIZE, &inv_txfm_param);
      }
#if CONFIG_DAALA_DIST
      if (plane == 0) {
        if (bsw >= 8 && bsh >= 8)
          tmp = av1_daala_dist(src, src_stride, recon, MAX_TX_SIZE, tx_size, qm,
                               use_activity_masking, x->qindex);
        else
          tmp = 0;
      } else
#endif
        cpi->fn_ptr[tx_bsize].vf(src, src_stride, recon, MAX_TX_SIZE, &tmp);
    }
    *out_dist = (int64_t)tmp * 16;
  }
}

#if !CONFIG_PVQ
static int rate_block(int plane, int block, int coeff_ctx, TX_SIZE tx_size,
                      struct rdcost_block_args *args) {
  return av1_cost_coeffs(&args->cpi->common, args->x, plane, block, coeff_ctx,
                         tx_size, args->scan_order->scan,
                         args->scan_order->neighbors,
                         args->use_fast_coef_costing);
}
#endif

static uint64_t sum_squares_2d(const int16_t *diff, int diff_stride,
                               TX_SIZE tx_size) {
  uint64_t sse;
  switch (tx_size) {
#if CONFIG_CB4X4
    case TX_2X2:
      sse = aom_sum_squares_2d_i16_c(diff, diff_stride, tx_size_wide[tx_size]);
      break;
#endif
    case TX_4X8:
      sse = aom_sum_squares_2d_i16(diff, diff_stride, 4) +
            aom_sum_squares_2d_i16(diff + 4 * diff_stride, diff_stride, 4);
      break;
    case TX_8X4:
      sse = aom_sum_squares_2d_i16(diff, diff_stride, 4) +
            aom_sum_squares_2d_i16(diff + 4, diff_stride, 4);
      break;
    case TX_8X16:
      sse = aom_sum_squares_2d_i16(diff, diff_stride, 8) +
            aom_sum_squares_2d_i16(diff + 8 * diff_stride, diff_stride, 8);
      break;
    case TX_16X8:
      sse = aom_sum_squares_2d_i16(diff, diff_stride, 8) +
            aom_sum_squares_2d_i16(diff + 8, diff_stride, 8);
      break;
    case TX_16X32:
      sse = aom_sum_squares_2d_i16(diff, diff_stride, 16) +
            aom_sum_squares_2d_i16(diff + 16 * diff_stride, diff_stride, 16);
      break;
    case TX_32X16:
      sse = aom_sum_squares_2d_i16(diff, diff_stride, 16) +
            aom_sum_squares_2d_i16(diff + 16, diff_stride, 16);
      break;
    default:
      assert(tx_size < TX_SIZES);
      sse = aom_sum_squares_2d_i16(diff, diff_stride, tx_size_wide[tx_size]);
      break;
  }
  return sse;
}

static void block_rd_txfm(int plane, int block, int blk_row, int blk_col,
                          BLOCK_SIZE plane_bsize, TX_SIZE tx_size, void *arg) {
  struct rdcost_block_args *args = arg;
  MACROBLOCK *const x = args->x;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  const AV1_COMMON *cm = &args->cpi->common;
  int64_t rd1, rd2, rd;
  int coeff_ctx = combine_entropy_contexts(*(args->t_above + blk_col),
                                           *(args->t_left + blk_row));
  RD_STATS this_rd_stats;
#if CONFIG_DAALA_DIST
  int qm = OD_HVS_QM;
  int use_activity_masking = 0;
#if CONFIG_PVQ
  use_activity_masking = x->daala_enc.use_activity_masking;
#endif
#endif

  av1_init_rd_stats(&this_rd_stats);

  if (args->exit_early) return;

  if (!is_inter_block(mbmi)) {
    struct encode_b_args b_args = {
      (AV1_COMMON *)cm, x, NULL, &mbmi->skip, args->t_above, args->t_left, 1
    };
    av1_encode_block_intra(plane, block, blk_row, blk_col, plane_bsize, tx_size,
                           &b_args);
    if (args->cpi->sf.use_transform_domain_distortion && !CONFIG_DAALA_DIST) {
      dist_block(args->cpi, x, plane, block, blk_row, blk_col, tx_size,
                 &this_rd_stats.dist, &this_rd_stats.sse);
    } else {
      // Note that the encode block_intra call above already calls
      // inv_txfm_add, so we can't just call dist_block here.
      const BLOCK_SIZE tx_bsize = txsize_to_bsize[tx_size];
      const aom_variance_fn_t variance = args->cpi->fn_ptr[tx_bsize].vf;
      const struct macroblock_plane *const p = &x->plane[plane];
      const struct macroblockd_plane *const pd = &xd->plane[plane];

      const int src_stride = p->src.stride;
      const int dst_stride = pd->dst.stride;
      const int diff_stride = block_size_wide[plane_bsize];

      const uint8_t *src =
          &p->src.buf[(blk_row * src_stride + blk_col) << tx_size_wide_log2[0]];
      const uint8_t *dst =
          &pd->dst
               .buf[(blk_row * dst_stride + blk_col) << tx_size_wide_log2[0]];
      const int16_t *diff = &p->src_diff[(blk_row * diff_stride + blk_col)
                                         << tx_size_wide_log2[0]];
      unsigned int tmp;

#if CONFIG_DAALA_DIST
      if (plane == 0) {
        const int bsw = block_size_wide[tx_bsize];
        const int bsh = block_size_high[tx_bsize];

        if (bsw >= 8 && bsh >= 8) {
          const int16_t *pred = &pd->pred[(blk_row * diff_stride + blk_col)
                                          << tx_size_wide_log2[0]];
          int i, j;
          DECLARE_ALIGNED(16, uint8_t, pred8[MAX_TX_SQUARE]);

          for (j = 0; j < bsh; j++)
            for (i = 0; i < bsw; i++)
              pred8[j * bsw + i] = pred[j * diff_stride + i];

          this_rd_stats.sse =
              av1_daala_dist(src, src_stride, pred8, bsw, tx_size, qm,
                             use_activity_masking, x->qindex);
        } else {
          this_rd_stats.sse = 0;
        }
      } else
#endif
      {
        this_rd_stats.sse = sum_squares_2d(diff, diff_stride, tx_size);

#if CONFIG_AOM_HIGHBITDEPTH
        if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)
          this_rd_stats.sse =
              ROUND_POWER_OF_TWO(this_rd_stats.sse, (xd->bd - 8) * 2);
#endif  // CONFIG_AOM_HIGHBITDEPTH
      }

      this_rd_stats.sse = this_rd_stats.sse * 16;

#if CONFIG_DAALA_DIST
      if (plane == 0) {
        const int bsw = block_size_wide[tx_bsize];
        const int bsh = block_size_high[tx_bsize];

        if (bsw >= 8 && bsh >= 8)
          tmp = av1_daala_dist(src, src_stride, dst, dst_stride, tx_size, qm,
                               use_activity_masking, x->qindex);
        else
          tmp = 0;
      } else
#endif
        variance(src, src_stride, dst, dst_stride, &tmp);
      this_rd_stats.dist = (int64_t)tmp * 16;
    }
  } else {
// full forward transform and quantization
#if CONFIG_NEW_QUANT
    av1_xform_quant(cm, x, plane, block, blk_row, blk_col, plane_bsize, tx_size,
                    coeff_ctx, AV1_XFORM_QUANT_FP_NUQ);
#else
    av1_xform_quant(cm, x, plane, block, blk_row, blk_col, plane_bsize, tx_size,
                    coeff_ctx, AV1_XFORM_QUANT_FP);
#endif  // CONFIG_NEW_QUANT
#if !CONFIG_PVQ
    if (x->plane[plane].eobs[block] && !xd->lossless[mbmi->segment_id]) {
      args->t_above[blk_col] = args->t_left[blk_row] =
          (av1_optimize_b(cm, x, plane, block, tx_size, coeff_ctx) > 0);
    } else {
      args->t_above[blk_col] = (x->plane[plane].eobs[block] > 0);
      args->t_left[blk_row] = (x->plane[plane].eobs[block] > 0);
    }
#endif
    dist_block(args->cpi, x, plane, block, blk_row, blk_col, tx_size,
               &this_rd_stats.dist, &this_rd_stats.sse);
  }

  rd = RDCOST(x->rdmult, x->rddiv, 0, this_rd_stats.dist);
  if (args->this_rd + rd > args->best_rd) {
    args->exit_early = 1;
    return;
  }
#if !CONFIG_PVQ
  this_rd_stats.rate = rate_block(plane, block, coeff_ctx, tx_size, args);
#if CONFIG_RD_DEBUG
  av1_update_txb_coeff_cost(&this_rd_stats, plane, tx_size, blk_row, blk_col,
                            this_rd_stats.rate);
#endif

#else
  this_rd_stats.rate = x->rate;
  args->t_above[blk_col] = !x->pvq_skip[plane];
  args->t_left[blk_row] = !x->pvq_skip[plane];
#endif
  rd1 = RDCOST(x->rdmult, x->rddiv, this_rd_stats.rate, this_rd_stats.dist);
  rd2 = RDCOST(x->rdmult, x->rddiv, 0, this_rd_stats.sse);

  // TODO(jingning): temporarily enabled only for luma component
  rd = AOMMIN(rd1, rd2);

#if CONFIG_DAALA_DIST
  if (plane == 0 && tx_size <= TX_4X4) {
    rd = 0;
    x->rate_4x4[block] = this_rd_stats.rate;
  }
#endif

#if !CONFIG_PVQ
  this_rd_stats.skip &= !x->plane[plane].eobs[block];
#else
  this_rd_stats.skip &= x->pvq_skip[plane];
#endif
  av1_merge_rd_stats(&args->rd_stats, &this_rd_stats);

  args->this_rd += rd;

  if (args->this_rd > args->best_rd) {
    args->exit_early = 1;
    return;
  }
}

#if CONFIG_DAALA_DIST
static void block_8x8_rd_txfm_daala_dist(int plane, int block, int blk_row,
                                         int blk_col, BLOCK_SIZE plane_bsize,
                                         TX_SIZE tx_size, void *arg) {
  struct rdcost_block_args *args = arg;
  MACROBLOCK *const x = args->x;
  MACROBLOCKD *const xd = &x->e_mbd;
  // MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  // const AV1_COMMON *cm = &args->cpi->common;
  int64_t rd1, rd2, rd;
  RD_STATS this_rd_stats;
  int qm = OD_HVS_QM;
  int use_activity_masking = 0;

#if CONFIG_PVQ
  use_activity_masking = x->daala_enc.use_activity_masking;
#endif
  av1_init_rd_stats(&this_rd_stats);

  if (args->exit_early) return;

  {
    const struct macroblock_plane *const p = &x->plane[plane];
    const struct macroblockd_plane *const pd = &xd->plane[plane];

    const int src_stride = p->src.stride;
    const int dst_stride = pd->dst.stride;
    const int diff_stride = block_size_wide[plane_bsize];

    const uint8_t *src =
        &p->src.buf[(blk_row * src_stride + blk_col) << tx_size_wide_log2[0]];
    const uint8_t *dst =
        &pd->dst.buf[(blk_row * dst_stride + blk_col) << tx_size_wide_log2[0]];

    unsigned int tmp;

    int qindex = x->qindex;

    const int16_t *pred =
        &pd->pred[(blk_row * diff_stride + blk_col) << tx_size_wide_log2[0]];
    int i, j;
    const int tx_blk_size = 1 << (tx_size + 2);
    DECLARE_ALIGNED(16, uint8_t, pred8[MAX_TX_SQUARE]);

    for (j = 0; j < tx_blk_size; j++)
      for (i = 0; i < tx_blk_size; i++)
        pred8[j * tx_blk_size + i] = pred[j * diff_stride + i];

    this_rd_stats.sse =
        av1_daala_dist(src, src_stride, pred8, tx_blk_size, tx_size, qm,
                       use_activity_masking, qindex);

    this_rd_stats.sse = this_rd_stats.sse * 16;

    tmp = av1_daala_dist(src, src_stride, dst, dst_stride, tx_size, qm,
                         use_activity_masking, qindex);

    this_rd_stats.dist = (int64_t)tmp * 16;
  }

  rd = RDCOST(x->rdmult, x->rddiv, 0, this_rd_stats.dist);
  if (args->this_rd + rd > args->best_rd) {
    args->exit_early = 1;
    return;
  }

  {
    const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane);
    // The rate of the current 8x8 block is the sum of four 4x4 blocks in it.
    this_rd_stats.rate = x->rate_4x4[block - max_blocks_wide - 1] +
                         x->rate_4x4[block - max_blocks_wide] +
                         x->rate_4x4[block - 1] + x->rate_4x4[block];
  }
  rd1 = RDCOST(x->rdmult, x->rddiv, this_rd_stats.rate, this_rd_stats.dist);
  rd2 = RDCOST(x->rdmult, x->rddiv, 0, this_rd_stats.sse);

  rd = AOMMIN(rd1, rd2);

  args->rd_stats.dist += this_rd_stats.dist;
  args->rd_stats.sse += this_rd_stats.sse;

  args->this_rd += rd;

  if (args->this_rd > args->best_rd) {
    args->exit_early = 1;
    return;
  }
}
#endif  // #if CONFIG_DAALA_DIST

static void txfm_rd_in_plane(MACROBLOCK *x, const AV1_COMP *cpi,
                             RD_STATS *rd_stats, int64_t ref_best_rd, int plane,
                             BLOCK_SIZE bsize, TX_SIZE tx_size,
                             int use_fast_coef_casting) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  const struct macroblockd_plane *const pd = &xd->plane[plane];
  TX_TYPE tx_type;
  struct rdcost_block_args args;
  av1_zero(args);
  args.x = x;
  args.cpi = cpi;
  args.best_rd = ref_best_rd;
  args.use_fast_coef_costing = use_fast_coef_casting;
  av1_init_rd_stats(&args.rd_stats);

  if (plane == 0) xd->mi[0]->mbmi.tx_size = tx_size;

  av1_get_entropy_contexts(bsize, tx_size, pd, args.t_above, args.t_left);

  tx_type = get_tx_type(pd->plane_type, xd, 0, tx_size);
  args.scan_order =
      get_scan(cm, tx_size, tx_type, is_inter_block(&xd->mi[0]->mbmi));

#if CONFIG_DAALA_DIST
  if (plane == 0 &&
      (tx_size == TX_4X4 || tx_size == TX_4X8 || tx_size == TX_8X4))
    av1_foreach_8x8_transformed_block_in_plane(
        xd, bsize, plane, block_rd_txfm, block_8x8_rd_txfm_daala_dist, &args);
  else
#endif
    av1_foreach_transformed_block_in_plane(xd, bsize, plane, block_rd_txfm,
                                           &args);

  if (args.exit_early) {
    av1_invalid_rd_stats(rd_stats);
  } else {
    *rd_stats = args.rd_stats;
  }
}

#if CONFIG_SUPERTX
void av1_txfm_rd_in_plane_supertx(MACROBLOCK *x, const AV1_COMP *cpi, int *rate,
                                  int64_t *distortion, int *skippable,
                                  int64_t *sse, int64_t ref_best_rd, int plane,
                                  BLOCK_SIZE bsize, TX_SIZE tx_size,
                                  int use_fast_coef_casting) {
  const AV1_COMMON *cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  const struct macroblockd_plane *const pd = &xd->plane[plane];
  struct rdcost_block_args args;
  TX_TYPE tx_type;

  av1_zero(args);
  args.cpi = cpi;
  args.x = x;
  args.best_rd = ref_best_rd;
  args.use_fast_coef_costing = use_fast_coef_casting;

#if CONFIG_EXT_TX
  assert(tx_size < TX_SIZES);
#endif  // CONFIG_EXT_TX

  if (plane == 0) xd->mi[0]->mbmi.tx_size = tx_size;

  av1_get_entropy_contexts(bsize, tx_size, pd, args.t_above, args.t_left);

  tx_type = get_tx_type(pd->plane_type, xd, 0, tx_size);
  args.scan_order =
      get_scan(cm, tx_size, tx_type, is_inter_block(&xd->mi[0]->mbmi));

  block_rd_txfm(plane, 0, 0, 0, get_plane_block_size(bsize, pd), tx_size,
                &args);

  if (args.exit_early) {
    *rate = INT_MAX;
    *distortion = INT64_MAX;
    *sse = INT64_MAX;
    *skippable = 0;
  } else {
    *distortion = args.rd_stats.dist;
    *rate = args.rd_stats.rate;
    *sse = args.rd_stats.sse;
    *skippable = !x->plane[plane].eobs[0];
  }
}
#endif  // CONFIG_SUPERTX

static int tx_size_cost(const AV1_COMP *const cpi, MACROBLOCK *x,
                        BLOCK_SIZE bsize, TX_SIZE tx_size) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;

  const int tx_select =
      cm->tx_mode == TX_MODE_SELECT && mbmi->sb_type >= BLOCK_8X8;

  if (tx_select) {
    const int is_inter = is_inter_block(mbmi);
    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);
    const int tx_size_ctx = get_tx_size_context(xd);
    const int r_tx_size = cpi->tx_size_cost[tx_size_cat][tx_size_ctx][depth];
    return r_tx_size;
  } else {
    return 0;
  }
}

static int64_t txfm_yrd(const AV1_COMP *const cpi, MACROBLOCK *x,
                        RD_STATS *rd_stats, int64_t ref_best_rd, BLOCK_SIZE bs,
                        TX_TYPE tx_type, int tx_size) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  int64_t rd = INT64_MAX;
  aom_prob skip_prob = av1_get_skip_prob(cm, xd);
  int s0, s1;
  const int is_inter = is_inter_block(mbmi);
  const int tx_select =
      cm->tx_mode == TX_MODE_SELECT && mbmi->sb_type >= BLOCK_8X8;

  const int r_tx_size = tx_size_cost(cpi, x, bs, tx_size);

  assert(skip_prob > 0);
#if CONFIG_EXT_TX && CONFIG_RECT_TX
  assert(IMPLIES(is_rect_tx(tx_size), is_rect_tx_allowed_bsize(bs)));
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX

  s0 = av1_cost_bit(skip_prob, 0);
  s1 = av1_cost_bit(skip_prob, 1);

  mbmi->tx_type = tx_type;
  mbmi->tx_size = tx_size;
  txfm_rd_in_plane(x, cpi, rd_stats, ref_best_rd, 0, bs, tx_size,
                   cpi->sf.use_fast_coef_costing);
  if (rd_stats->rate == INT_MAX) return INT64_MAX;
#if CONFIG_EXT_TX
  if (get_ext_tx_types(tx_size, bs, is_inter) > 1 &&
      !xd->lossless[xd->mi[0]->mbmi.segment_id]) {
    const int ext_tx_set = get_ext_tx_set(tx_size, bs, is_inter);
    if (is_inter) {
      if (ext_tx_set > 0)
        rd_stats->rate +=
            cpi->inter_tx_type_costs[ext_tx_set][txsize_sqr_map[mbmi->tx_size]]
                                    [mbmi->tx_type];
    } else {
      if (ext_tx_set > 0 && ALLOW_INTRA_EXT_TX)
        rd_stats->rate +=
            cpi->intra_tx_type_costs[ext_tx_set][txsize_sqr_map[mbmi->tx_size]]
                                    [mbmi->mode][mbmi->tx_type];
    }
  }
#else
  if (tx_size < TX_32X32 && !xd->lossless[xd->mi[0]->mbmi.segment_id] &&
      !FIXED_TX_TYPE) {
    if (is_inter) {
      rd_stats->rate += cpi->inter_tx_type_costs[mbmi->tx_size][mbmi->tx_type];
    } else {
      rd_stats->rate +=
          cpi->intra_tx_type_costs[mbmi->tx_size]
                                  [intra_mode_to_tx_type_context[mbmi->mode]]
                                  [mbmi->tx_type];
    }
  }
#endif  // CONFIG_EXT_TX

  if (rd_stats->skip) {
    if (is_inter) {
      rd = RDCOST(x->rdmult, x->rddiv, s1, rd_stats->sse);
    } else {
      rd = RDCOST(x->rdmult, x->rddiv, s1 + r_tx_size * tx_select,
                  rd_stats->sse);
    }
  } else {
    rd = RDCOST(x->rdmult, x->rddiv,
                rd_stats->rate + s0 + r_tx_size * tx_select, rd_stats->dist);
  }

  if (tx_select) rd_stats->rate += r_tx_size;

  if (is_inter && !xd->lossless[xd->mi[0]->mbmi.segment_id] &&
      !(rd_stats->skip))
    rd = AOMMIN(rd, RDCOST(x->rdmult, x->rddiv, s1, rd_stats->sse));

  return rd;
}

static int64_t choose_tx_size_fix_type(const AV1_COMP *const cpi, BLOCK_SIZE bs,
                                       MACROBLOCK *x, RD_STATS *rd_stats,
                                       int64_t ref_best_rd, TX_TYPE tx_type,
#if CONFIG_PVQ
                                       od_rollback_buffer buf,
#endif
                                       int prune) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  int64_t rd = INT64_MAX;
  int n;
  int start_tx, end_tx;
  int64_t best_rd = INT64_MAX, last_rd = INT64_MAX;
  const TX_SIZE max_tx_size = max_txsize_lookup[bs];
  TX_SIZE best_tx_size = max_tx_size;
  const int tx_select = cm->tx_mode == TX_MODE_SELECT;
  const int is_inter = is_inter_block(mbmi);
#if CONFIG_EXT_TX
#if CONFIG_RECT_TX
  int evaluate_rect_tx = 0;
#endif  // CONFIG_RECT_TX
  int ext_tx_set;
#endif  // CONFIG_EXT_TX

  if (tx_select) {
#if CONFIG_EXT_TX && CONFIG_RECT_TX
    evaluate_rect_tx = is_rect_tx_allowed(xd, mbmi);
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX
    start_tx = max_tx_size;
    end_tx = (max_tx_size >= TX_32X32) ? TX_8X8 : TX_4X4;
  } else {
    const TX_SIZE chosen_tx_size =
        tx_size_from_tx_mode(bs, cm->tx_mode, is_inter);
#if CONFIG_EXT_TX && CONFIG_RECT_TX
    evaluate_rect_tx = is_rect_tx(chosen_tx_size);
    assert(IMPLIES(evaluate_rect_tx, is_rect_tx_allowed(xd, mbmi)));
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX
    start_tx = chosen_tx_size;
    end_tx = chosen_tx_size;
  }

  av1_invalid_rd_stats(rd_stats);

  mbmi->tx_type = tx_type;

#if CONFIG_EXT_TX && CONFIG_RECT_TX
  if (evaluate_rect_tx) {
    const TX_SIZE rect_tx_size = max_txsize_rect_lookup[bs];
    RD_STATS this_rd_stats;
    ext_tx_set = get_ext_tx_set(rect_tx_size, bs, is_inter);
    if ((is_inter && ext_tx_used_inter[ext_tx_set][tx_type]) ||
        (!is_inter && ext_tx_used_intra[ext_tx_set][tx_type])) {
      rd = txfm_yrd(cpi, x, &this_rd_stats, ref_best_rd, bs, tx_type,
                    rect_tx_size);
      best_tx_size = rect_tx_size;
      best_rd = rd;
      *rd_stats = this_rd_stats;
    }
  }
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX

  last_rd = INT64_MAX;
  for (n = start_tx; n >= end_tx; --n) {
    RD_STATS this_rd_stats;
#if CONFIG_EXT_TX && CONFIG_RECT_TX
    if (is_rect_tx(n)) break;
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX
    if (FIXED_TX_TYPE && tx_type != get_default_tx_type(0, xd, 0, n)) continue;
    if (!is_inter && x->use_default_intra_tx_type &&
        tx_type != get_default_tx_type(0, xd, 0, n))
      continue;
    if (is_inter && x->use_default_inter_tx_type &&
        tx_type != get_default_tx_type(0, xd, 0, n))
      continue;
    if (max_tx_size >= TX_32X32 && n == TX_4X4) continue;
#if CONFIG_EXT_TX
    ext_tx_set = get_ext_tx_set(n, bs, is_inter);
    if (is_inter) {
      if (!ext_tx_used_inter[ext_tx_set][tx_type]) continue;
      if (cpi->sf.tx_type_search.prune_mode > NO_PRUNE) {
        if (!do_tx_type_search(tx_type, prune)) continue;
      }
    } else {
      if (!ALLOW_INTRA_EXT_TX && bs >= BLOCK_8X8) {
        if (tx_type != intra_mode_to_tx_type_context[mbmi->mode]) continue;
      }
      if (!ext_tx_used_intra[ext_tx_set][tx_type]) continue;
    }
#else   // CONFIG_EXT_TX
    if (n >= TX_32X32 && tx_type != DCT_DCT) continue;
    if (is_inter && cpi->sf.tx_type_search.prune_mode > NO_PRUNE &&
        !do_tx_type_search(tx_type, prune))
      continue;
#endif  // CONFIG_EXT_TX

    rd = txfm_yrd(cpi, x, &this_rd_stats, ref_best_rd, bs, tx_type, n);
#if CONFIG_PVQ
    od_encode_rollback(&x->daala_enc, &buf);
#endif
    // Early termination in transform size search.
    if (cpi->sf.tx_size_search_breakout &&
        (rd == INT64_MAX ||
         (this_rd_stats.skip == 1 && tx_type != DCT_DCT && n < start_tx) ||
         (n < (int)max_tx_size && rd > last_rd)))
      break;

    last_rd = rd;
    if (rd < best_rd) {
      best_tx_size = n;
      best_rd = rd;
      *rd_stats = this_rd_stats;
    }
  }
  mbmi->tx_size = best_tx_size;

  return best_rd;
}

#if CONFIG_EXT_INTER
static int64_t estimate_yrd_for_sb(const AV1_COMP *const cpi, BLOCK_SIZE bs,
                                   MACROBLOCK *x, int *r, int64_t *d, int *s,
                                   int64_t *sse, int64_t ref_best_rd) {
  RD_STATS rd_stats;
  int64_t rd = txfm_yrd(cpi, x, &rd_stats, ref_best_rd, bs, DCT_DCT,
                        max_txsize_lookup[bs]);
  *r = rd_stats.rate;
  *d = rd_stats.dist;
  *s = rd_stats.skip;
  *sse = rd_stats.sse;
  return rd;
}
#endif  // CONFIG_EXT_INTER

static void choose_largest_tx_size(const AV1_COMP *const cpi, MACROBLOCK *x,
                                   RD_STATS *rd_stats, int64_t ref_best_rd,
                                   BLOCK_SIZE bs) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  TX_TYPE tx_type, best_tx_type = DCT_DCT;
  int64_t this_rd, best_rd = INT64_MAX;
  aom_prob skip_prob = av1_get_skip_prob(cm, xd);
  int s0 = av1_cost_bit(skip_prob, 0);
  int s1 = av1_cost_bit(skip_prob, 1);
  const int is_inter = is_inter_block(mbmi);
  int prune = 0;
#if CONFIG_EXT_TX
  int ext_tx_set;
#endif  // CONFIG_EXT_TX
  av1_invalid_rd_stats(rd_stats);

  mbmi->tx_size = tx_size_from_tx_mode(bs, cm->tx_mode, is_inter);
#if CONFIG_VAR_TX
  mbmi->min_tx_size = get_min_tx_size(mbmi->tx_size);
#endif
#if CONFIG_EXT_TX
  ext_tx_set = get_ext_tx_set(mbmi->tx_size, bs, is_inter);
#endif  // CONFIG_EXT_TX

  if (is_inter && cpi->sf.tx_type_search.prune_mode > NO_PRUNE)
#if CONFIG_EXT_TX
    prune = prune_tx_types(cpi, bs, x, xd, ext_tx_set);
#else
    prune = prune_tx_types(cpi, bs, x, xd, 0);
#endif
#if CONFIG_EXT_TX
  if (get_ext_tx_types(mbmi->tx_size, bs, is_inter) > 1 &&
      !xd->lossless[mbmi->segment_id]) {
#if CONFIG_PVQ
    od_rollback_buffer pre_buf, post_buf;

    od_encode_checkpoint(&x->daala_enc, &pre_buf);
    od_encode_checkpoint(&x->daala_enc, &post_buf);
#endif

    for (tx_type = DCT_DCT; tx_type < TX_TYPES; ++tx_type) {
      RD_STATS this_rd_stats;
      if (is_inter) {
        if (x->use_default_inter_tx_type &&
            tx_type != get_default_tx_type(0, xd, 0, mbmi->tx_size))
          continue;
        if (!ext_tx_used_inter[ext_tx_set][tx_type]) continue;
        if (cpi->sf.tx_type_search.prune_mode > NO_PRUNE) {
          if (!do_tx_type_search(tx_type, prune)) continue;
        }
      } else {
        if (x->use_default_intra_tx_type &&
            tx_type != get_default_tx_type(0, xd, 0, mbmi->tx_size))
          continue;
        if (!ALLOW_INTRA_EXT_TX && bs >= BLOCK_8X8) {
          if (tx_type != intra_mode_to_tx_type_context[mbmi->mode]) continue;
        }
        if (!ext_tx_used_intra[ext_tx_set][tx_type]) continue;
      }

      mbmi->tx_type = tx_type;

      txfm_rd_in_plane(x, cpi, &this_rd_stats, ref_best_rd, 0, bs,
                       mbmi->tx_size, cpi->sf.use_fast_coef_costing);
#if CONFIG_PVQ
      od_encode_rollback(&x->daala_enc, &pre_buf);
#endif
      if (this_rd_stats.rate == INT_MAX) continue;
      if (get_ext_tx_types(mbmi->tx_size, bs, is_inter) > 1) {
        if (is_inter) {
          if (ext_tx_set > 0)
            this_rd_stats.rate +=
                cpi->inter_tx_type_costs[ext_tx_set]
                                        [txsize_sqr_map[mbmi->tx_size]]
                                        [mbmi->tx_type];
        } else {
          if (ext_tx_set > 0 && ALLOW_INTRA_EXT_TX)
            this_rd_stats.rate +=
                cpi->intra_tx_type_costs[ext_tx_set]
                                        [txsize_sqr_map[mbmi->tx_size]]
                                        [mbmi->mode][mbmi->tx_type];
        }
      }

      if (this_rd_stats.skip)
        this_rd = RDCOST(x->rdmult, x->rddiv, s1, this_rd_stats.sse);
      else
        this_rd = RDCOST(x->rdmult, x->rddiv, this_rd_stats.rate + s0,
                         this_rd_stats.dist);
      if (is_inter_block(mbmi) && !xd->lossless[mbmi->segment_id] &&
          !this_rd_stats.skip)
        this_rd =
            AOMMIN(this_rd, RDCOST(x->rdmult, x->rddiv, s1, this_rd_stats.sse));

      if (this_rd < best_rd) {
        best_rd = this_rd;
        best_tx_type = mbmi->tx_type;
        *rd_stats = this_rd_stats;
#if CONFIG_PVQ
        od_encode_checkpoint(&x->daala_enc, &post_buf);
#endif
      }
    }
#if CONFIG_PVQ
    od_encode_rollback(&x->daala_enc, &post_buf);
#endif
  } else {
    mbmi->tx_type = DCT_DCT;
    txfm_rd_in_plane(x, cpi, rd_stats, ref_best_rd, 0, bs, mbmi->tx_size,
                     cpi->sf.use_fast_coef_costing);
  }
#else   // CONFIG_EXT_TX
  if (mbmi->tx_size < TX_32X32 && !xd->lossless[mbmi->segment_id]) {
    for (tx_type = 0; tx_type < TX_TYPES; ++tx_type) {
      RD_STATS this_rd_stats;
      if (!is_inter && x->use_default_intra_tx_type &&
          tx_type != get_default_tx_type(0, xd, 0, mbmi->tx_size))
        continue;
      if (is_inter && x->use_default_inter_tx_type &&
          tx_type != get_default_tx_type(0, xd, 0, mbmi->tx_size))
        continue;
      mbmi->tx_type = tx_type;
      txfm_rd_in_plane(x, cpi, &this_rd_stats, ref_best_rd, 0, bs,
                       mbmi->tx_size, cpi->sf.use_fast_coef_costing);
      if (this_rd_stats.rate == INT_MAX) continue;
      if (is_inter) {
        this_rd_stats.rate +=
            cpi->inter_tx_type_costs[mbmi->tx_size][mbmi->tx_type];
        if (cpi->sf.tx_type_search.prune_mode > NO_PRUNE &&
            !do_tx_type_search(tx_type, prune))
          continue;
      } else {
        this_rd_stats.rate +=
            cpi->intra_tx_type_costs[mbmi->tx_size]
                                    [intra_mode_to_tx_type_context[mbmi->mode]]
                                    [mbmi->tx_type];
      }
      if (this_rd_stats.skip)
        this_rd = RDCOST(x->rdmult, x->rddiv, s1, this_rd_stats.sse);
      else
        this_rd = RDCOST(x->rdmult, x->rddiv, this_rd_stats.rate + s0,
                         this_rd_stats.dist);
      if (is_inter && !xd->lossless[mbmi->segment_id] && !this_rd_stats.skip)
        this_rd =
            AOMMIN(this_rd, RDCOST(x->rdmult, x->rddiv, s1, this_rd_stats.sse));

      if (this_rd < best_rd) {
        best_rd = this_rd;
        best_tx_type = mbmi->tx_type;
        *rd_stats = this_rd_stats;
      }
    }
  } else {
    mbmi->tx_type = DCT_DCT;
    txfm_rd_in_plane(x, cpi, rd_stats, ref_best_rd, 0, bs, mbmi->tx_size,
                     cpi->sf.use_fast_coef_costing);
  }
#endif  // CONFIG_EXT_TX
  mbmi->tx_type = best_tx_type;
}

static void choose_smallest_tx_size(const AV1_COMP *const cpi, MACROBLOCK *x,
                                    RD_STATS *rd_stats, int64_t ref_best_rd,
                                    BLOCK_SIZE bs) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;

  mbmi->tx_size = TX_4X4;
  mbmi->tx_type = DCT_DCT;
#if CONFIG_VAR_TX
  mbmi->min_tx_size = get_min_tx_size(TX_4X4);
#endif

  txfm_rd_in_plane(x, cpi, rd_stats, ref_best_rd, 0, bs, mbmi->tx_size,
                   cpi->sf.use_fast_coef_costing);
}

static void choose_tx_size_type_from_rd(const AV1_COMP *const cpi,
                                        MACROBLOCK *x, RD_STATS *rd_stats,
                                        int64_t ref_best_rd, BLOCK_SIZE bs) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  int64_t rd = INT64_MAX;
  int64_t best_rd = INT64_MAX;
  TX_SIZE best_tx = max_txsize_lookup[bs];
  const int is_inter = is_inter_block(mbmi);
  TX_TYPE tx_type, best_tx_type = DCT_DCT;
  int prune = 0;

#if CONFIG_PVQ
  od_rollback_buffer buf;
#endif
  if (is_inter && cpi->sf.tx_type_search.prune_mode > NO_PRUNE)
    // passing -1 in for tx_type indicates that all 1D
    // transforms should be considered for pruning
    prune = prune_tx_types(cpi, bs, x, xd, -1);

  av1_invalid_rd_stats(rd_stats);

#if CONFIG_PVQ
  od_encode_checkpoint(&x->daala_enc, &buf);
#endif

  for (tx_type = DCT_DCT; tx_type < TX_TYPES; ++tx_type) {
    RD_STATS this_rd_stats;
#if CONFIG_REF_MV
    if (mbmi->ref_mv_idx > 0 && tx_type != DCT_DCT) continue;
#endif
    rd = choose_tx_size_fix_type(cpi, bs, x, &this_rd_stats, ref_best_rd,
                                 tx_type,
#if CONFIG_PVQ
                                 buf,
#endif
                                 prune);
    if (rd < best_rd) {
      best_rd = rd;
      *rd_stats = this_rd_stats;
      best_tx_type = tx_type;
      best_tx = mbmi->tx_size;
    }
  }

  mbmi->tx_size = best_tx;
  mbmi->tx_type = best_tx_type;

#if CONFIG_VAR_TX
  mbmi->min_tx_size = get_min_tx_size(mbmi->tx_size);
#endif

#if !CONFIG_EXT_TX
  if (mbmi->tx_size >= TX_32X32) assert(mbmi->tx_type == DCT_DCT);
#endif
#if CONFIG_PVQ
  if (best_rd != INT64_MAX) {
    txfm_yrd(cpi, x, rd_stats, ref_best_rd, bs, best_tx_type, best_tx);
  }
#endif
}

static void super_block_yrd(const AV1_COMP *const cpi, MACROBLOCK *x,
                            RD_STATS *rd_stats, BLOCK_SIZE bs,
                            int64_t ref_best_rd) {
  MACROBLOCKD *xd = &x->e_mbd;
  av1_init_rd_stats(rd_stats);

  assert(bs == xd->mi[0]->mbmi.sb_type);

  if (xd->lossless[0]) {
    choose_smallest_tx_size(cpi, x, rd_stats, ref_best_rd, bs);
  } else if (cpi->sf.tx_size_search_method == USE_LARGESTALL) {
    choose_largest_tx_size(cpi, x, rd_stats, ref_best_rd, bs);
  } else {
    choose_tx_size_type_from_rd(cpi, x, rd_stats, ref_best_rd, bs);
  }
}

static int conditional_skipintra(PREDICTION_MODE mode,
                                 PREDICTION_MODE best_intra_mode) {
  if (mode == D117_PRED && best_intra_mode != V_PRED &&
      best_intra_mode != D135_PRED)
    return 1;
  if (mode == D63_PRED && best_intra_mode != V_PRED &&
      best_intra_mode != D45_PRED)
    return 1;
  if (mode == D207_PRED && best_intra_mode != H_PRED &&
      best_intra_mode != D45_PRED)
    return 1;
  if (mode == D153_PRED && best_intra_mode != H_PRED &&
      best_intra_mode != D135_PRED)
    return 1;
  return 0;
}

// Model based RD estimation for luma intra blocks.
static int64_t intra_model_yrd(const AV1_COMP *const cpi, MACROBLOCK *const x,
                               BLOCK_SIZE bsize, int mode_cost) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  RD_STATS this_rd_stats;
  int row, col;
  int64_t temp_sse, this_rd;
  const TX_SIZE tx_size = tx_size_from_tx_mode(bsize, cpi->common.tx_mode, 0);
  const int stepr = tx_size_high_unit[tx_size];
  const int stepc = tx_size_wide_unit[tx_size];
  const int max_blocks_wide = max_block_wide(xd, bsize, 0);
  const int max_blocks_high = max_block_high(xd, bsize, 0);
  mbmi->tx_size = tx_size;
  // Prediction.
  for (row = 0; row < max_blocks_high; row += stepr) {
    for (col = 0; col < max_blocks_wide; col += stepc) {
      struct macroblockd_plane *const pd = &xd->plane[0];
      uint8_t *dst =
          &pd->dst.buf[(row * pd->dst.stride + col) << tx_size_wide_log2[0]];
      av1_predict_intra_block(xd, pd->width, pd->height,
                              txsize_to_bsize[tx_size], mbmi->mode, dst,
                              pd->dst.stride, dst, pd->dst.stride, col, row, 0);
    }
  }
  // RD estimation.
  model_rd_for_sb(cpi, bsize, x, xd, 0, 0, &this_rd_stats.rate,
                  &this_rd_stats.dist, &this_rd_stats.skip, &temp_sse);
#if CONFIG_EXT_INTRA
  if (av1_is_directional_mode(mbmi->mode, bsize)) {
    const int max_angle_delta = av1_get_max_angle_delta(bsize, 0);
    mode_cost += write_uniform_cost(2 * max_angle_delta + 1,
                                    max_angle_delta + mbmi->angle_delta[0]);
  }
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
  if (mbmi->mode == DC_PRED) {
    const aom_prob prob = cpi->common.fc->filter_intra_probs[0];
    if (mbmi->filter_intra_mode_info.use_filter_intra_mode[0]) {
      const int mode = mbmi->filter_intra_mode_info.filter_intra_mode[0];
      mode_cost += (av1_cost_bit(prob, 1) +
                    write_uniform_cost(FILTER_INTRA_MODES, mode));
    } else {
      mode_cost += av1_cost_bit(prob, 0);
    }
  }
#endif  // CONFIG_FILTER_INTRA
  this_rd = RDCOST(x->rdmult, x->rddiv, this_rd_stats.rate + mode_cost,
                   this_rd_stats.dist);
  return this_rd;
}

#if CONFIG_PALETTE
// Extends 'color_map' array from 'orig_width x orig_height' to 'new_width x
// new_height'. Extra rows and columns are filled in by copying last valid
// row/column.
static void extend_palette_color_map(uint8_t *const color_map, int orig_width,
                                     int orig_height, int new_width,
                                     int new_height) {
  int j;
  assert(new_width >= orig_width);
  assert(new_height >= orig_height);
  if (new_width == orig_width && new_height == orig_height) return;

  for (j = orig_height - 1; j >= 0; --j) {
    memmove(color_map + j * new_width, color_map + j * orig_width, orig_width);
    // Copy last column to extra columns.
    memset(color_map + j * new_width + orig_width,
           color_map[j * new_width + orig_width - 1], new_width - orig_width);
  }
  // Copy last row to extra rows.
  for (j = orig_height; j < new_height; ++j) {
    memcpy(color_map + j * new_width, color_map + (orig_height - 1) * new_width,
           new_width);
  }
}

static int rd_pick_palette_intra_sby(const AV1_COMP *const cpi, MACROBLOCK *x,
                                     BLOCK_SIZE bsize, int palette_ctx,
                                     int dc_mode_cost, MB_MODE_INFO *best_mbmi,
                                     uint8_t *best_palette_color_map,
                                     int64_t *best_rd, int64_t *best_model_rd,
                                     int *rate, int *rate_tokenonly,
                                     int64_t *distortion, int *skippable) {
  int rate_overhead = 0;
  MACROBLOCKD *const xd = &x->e_mbd;
  MODE_INFO *const mic = xd->mi[0];
  MB_MODE_INFO *const mbmi = &mic->mbmi;
  int this_rate, colors, n;
  const int src_stride = x->plane[0].src.stride;
  const uint8_t *const src = x->plane[0].src.buf;
  uint8_t *const color_map = xd->plane[0].color_index_map;
  int block_width, block_height, rows, cols;
  av1_get_block_dimensions(bsize, 0, xd, &block_width, &block_height, &rows,
                           &cols);

  assert(cpi->common.allow_screen_content_tools);

#if CONFIG_AOM_HIGHBITDEPTH
  if (cpi->common.use_highbitdepth)
    colors = av1_count_colors_highbd(src, src_stride, rows, cols,
                                     cpi->common.bit_depth);
  else
#endif  // CONFIG_AOM_HIGHBITDEPTH
    colors = av1_count_colors(src, src_stride, rows, cols);
#if CONFIG_FILTER_INTRA
  mbmi->filter_intra_mode_info.use_filter_intra_mode[0] = 0;
#endif  // CONFIG_FILTER_INTRA

  if (colors > 1 && colors <= 64) {
    int r, c, i, j, k, palette_mode_cost;
    const int max_itr = 50;
    uint8_t color_order[PALETTE_MAX_SIZE];
    float *const data = x->palette_buffer->kmeans_data_buf;
    float centroids[PALETTE_MAX_SIZE];
    float lb, ub, val;
    RD_STATS tokenonly_rd_stats;
    int64_t this_rd, this_model_rd;
    PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info;
#if CONFIG_AOM_HIGHBITDEPTH
    uint16_t *src16 = CONVERT_TO_SHORTPTR(src);
    if (cpi->common.use_highbitdepth)
      lb = ub = src16[0];
    else
#endif  // CONFIG_AOM_HIGHBITDEPTH
      lb = ub = src[0];

#if CONFIG_AOM_HIGHBITDEPTH
    if (cpi->common.use_highbitdepth) {
      for (r = 0; r < rows; ++r) {
        for (c = 0; c < cols; ++c) {
          val = src16[r * src_stride + c];
          data[r * cols + c] = val;
          if (val < lb)
            lb = val;
          else if (val > ub)
            ub = val;
        }
      }
    } else {
#endif  // CONFIG_AOM_HIGHBITDEPTH
      for (r = 0; r < rows; ++r) {
        for (c = 0; c < cols; ++c) {
          val = src[r * src_stride + c];
          data[r * cols + c] = val;
          if (val < lb)
            lb = val;
          else if (val > ub)
            ub = val;
        }
      }
#if CONFIG_AOM_HIGHBITDEPTH
    }
#endif  // CONFIG_AOM_HIGHBITDEPTH

    mbmi->mode = DC_PRED;
#if CONFIG_FILTER_INTRA
    mbmi->filter_intra_mode_info.use_filter_intra_mode[0] = 0;
#endif  // CONFIG_FILTER_INTRA

    if (rows * cols > PALETTE_MAX_BLOCK_SIZE) return 0;

    for (n = colors > PALETTE_MAX_SIZE ? PALETTE_MAX_SIZE : colors; n >= 2;
         --n) {
      for (i = 0; i < n; ++i)
        centroids[i] = lb + (2 * i + 1) * (ub - lb) / n / 2;
      av1_k_means(data, centroids, color_map, rows * cols, n, 1, max_itr);
      k = av1_remove_duplicates(centroids, n);

#if CONFIG_AOM_HIGHBITDEPTH
      if (cpi->common.use_highbitdepth)
        for (i = 0; i < k; ++i)
          pmi->palette_colors[i] =
              clip_pixel_highbd((int)centroids[i], cpi->common.bit_depth);
      else
#endif  // CONFIG_AOM_HIGHBITDEPTH
        for (i = 0; i < k; ++i)
          pmi->palette_colors[i] = clip_pixel((int)centroids[i]);
      pmi->palette_size[0] = k;

      av1_calc_indices(data, centroids, color_map, rows * cols, k, 1);
      extend_palette_color_map(color_map, cols, rows, block_width,
                               block_height);
      palette_mode_cost =
          dc_mode_cost + cpi->common.bit_depth * k * av1_cost_bit(128, 0) +
          cpi->palette_y_size_cost[bsize - BLOCK_8X8][k - 2] +
          write_uniform_cost(k, color_map[0]) +
          av1_cost_bit(
              av1_default_palette_y_mode_prob[bsize - BLOCK_8X8][palette_ctx],
              1);
      for (i = 0; i < rows; ++i) {
        for (j = (i == 0 ? 1 : 0); j < cols; ++j) {
          int color_idx;
          const int color_ctx = av1_get_palette_color_index_context(
              color_map, block_width, i, j, k, color_order, &color_idx);
          assert(color_idx >= 0 && color_idx < k);
          palette_mode_cost +=
              cpi->palette_y_color_cost[k - 2][color_ctx][color_idx];
        }
      }
      this_model_rd = intra_model_yrd(cpi, x, bsize, palette_mode_cost);
      if (*best_model_rd != INT64_MAX &&
          this_model_rd > *best_model_rd + (*best_model_rd >> 1))
        continue;
      if (this_model_rd < *best_model_rd) *best_model_rd = this_model_rd;
      super_block_yrd(cpi, x, &tokenonly_rd_stats, bsize, *best_rd);
      if (tokenonly_rd_stats.rate == INT_MAX) continue;
      this_rate = tokenonly_rd_stats.rate + palette_mode_cost;
      this_rd = RDCOST(x->rdmult, x->rddiv, this_rate, tokenonly_rd_stats.dist);
      if (!xd->lossless[mbmi->segment_id] && mbmi->sb_type >= BLOCK_8X8) {
        tokenonly_rd_stats.rate -= tx_size_cost(cpi, x, bsize, mbmi->tx_size);
      }
      if (this_rd < *best_rd) {
        *best_rd = this_rd;
        memcpy(best_palette_color_map, color_map,
               block_width * block_height * sizeof(color_map[0]));
        *best_mbmi = *mbmi;
        rate_overhead = this_rate - tokenonly_rd_stats.rate;
        if (rate) *rate = this_rate;
        if (rate_tokenonly) *rate_tokenonly = tokenonly_rd_stats.rate;
        if (distortion) *distortion = tokenonly_rd_stats.dist;
        if (skippable) *skippable = tokenonly_rd_stats.skip;
      }
    }
  }

  if (best_mbmi->palette_mode_info.palette_size[0] > 0) {
    memcpy(color_map, best_palette_color_map,
           rows * cols * sizeof(best_palette_color_map[0]));
  }
  *mbmi = *best_mbmi;
  return rate_overhead;
}
#endif  // CONFIG_PALETTE

// Wrappers to make function pointers usable.
static void inv_txfm_add_4x8_wrapper(const tran_low_t *input, uint8_t *dest,
                                     int stride, int eob, TX_TYPE tx_type,
                                     int lossless) {
  (void)lossless;
  av1_inv_txfm_add_4x8(input, dest, stride, eob, tx_type);
}

static void inv_txfm_add_8x4_wrapper(const tran_low_t *input, uint8_t *dest,
                                     int stride, int eob, TX_TYPE tx_type,
                                     int lossless) {
  (void)lossless;
  av1_inv_txfm_add_8x4(input, dest, stride, eob, tx_type);
}

typedef void (*inv_txfm_func_ptr)(const tran_low_t *, uint8_t *, int, int,
                                  TX_TYPE, int);
#if CONFIG_AOM_HIGHBITDEPTH

void highbd_inv_txfm_add_4x8_wrapper(const tran_low_t *input, uint8_t *dest,
                                     int stride, int eob, int bd,
                                     TX_TYPE tx_type, int is_lossless) {
  (void)is_lossless;
  av1_highbd_inv_txfm_add_4x8(input, dest, stride, eob, bd, tx_type);
}

void highbd_inv_txfm_add_8x4_wrapper(const tran_low_t *input, uint8_t *dest,
                                     int stride, int eob, int bd,
                                     TX_TYPE tx_type, int is_lossless) {
  (void)is_lossless;
  av1_highbd_inv_txfm_add_8x4(input, dest, stride, eob, bd, tx_type);
}

typedef void (*highbd_inv_txfm_func_ptr)(const tran_low_t *, uint8_t *, int,
                                         int, int, TX_TYPE, int);
#endif  // CONFIG_AOM_HIGHBITDEPTH

static int64_t rd_pick_intra_sub_8x8_y_subblock_mode(
    const AV1_COMP *const cpi, MACROBLOCK *x, int row, int col,
    PREDICTION_MODE *best_mode, const int *bmode_costs, ENTROPY_CONTEXT *a,
    ENTROPY_CONTEXT *l, int *bestrate, int *bestratey, int64_t *bestdistortion,
    BLOCK_SIZE bsize, TX_SIZE tx_size, int *y_skip, int64_t rd_thresh) {
  const AV1_COMMON *const cm = &cpi->common;
  PREDICTION_MODE mode;
  MACROBLOCKD *const xd = &x->e_mbd;
  int64_t best_rd = rd_thresh;
  struct macroblock_plane *p = &x->plane[0];
  struct macroblockd_plane *pd = &xd->plane[0];
  const int src_stride = p->src.stride;
  const int dst_stride = pd->dst.stride;
  const uint8_t *src_init = &p->src.buf[row * 4 * src_stride + col * 4];
  uint8_t *dst_init = &pd->dst.buf[row * 4 * dst_stride + col * 4];
#if CONFIG_CB4X4
  // TODO(jingning): This is a temporal change. The whole function should be
  // out when cb4x4 is enabled.
  ENTROPY_CONTEXT ta[4], tempa[4];
  ENTROPY_CONTEXT tl[4], templ[4];
#else
  ENTROPY_CONTEXT ta[2], tempa[2];
  ENTROPY_CONTEXT tl[2], templ[2];
#endif

  const int pred_width_in_4x4_blocks = num_4x4_blocks_wide_lookup[bsize];
  const int pred_height_in_4x4_blocks = num_4x4_blocks_high_lookup[bsize];
  const int tx_width_unit = tx_size_wide_unit[tx_size];
  const int tx_height_unit = tx_size_high_unit[tx_size];
  const int pred_block_width = block_size_wide[bsize];
  const int pred_block_height = block_size_high[bsize];
  const int tx_width = tx_size_wide[tx_size];
  const int tx_height = tx_size_high[tx_size];
  const int pred_width_in_transform_blocks = pred_block_width / tx_width;
  const int pred_height_in_transform_blocks = pred_block_height / tx_height;
  int idx, idy;
  int best_can_skip = 0;
  uint8_t best_dst[8 * 8];
  inv_txfm_func_ptr inv_txfm_func =
      (tx_size == TX_4X4) ? av1_inv_txfm_add_4x4
                          : (tx_size == TX_4X8) ? inv_txfm_add_4x8_wrapper
                                                : inv_txfm_add_8x4_wrapper;
#if CONFIG_AOM_HIGHBITDEPTH
  uint16_t best_dst16[8 * 8];
  highbd_inv_txfm_func_ptr highbd_inv_txfm_func =
      (tx_size == TX_4X4)
          ? av1_highbd_inv_txfm_add_4x4
          : (tx_size == TX_4X8) ? highbd_inv_txfm_add_4x8_wrapper
                                : highbd_inv_txfm_add_8x4_wrapper;
#endif
  const int is_lossless = xd->lossless[xd->mi[0]->mbmi.segment_id];
#if CONFIG_EXT_TX && CONFIG_RECT_TX
  const int sub_bsize = bsize;
#else
  const int sub_bsize = BLOCK_4X4;
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX

#if CONFIG_PVQ
  od_rollback_buffer pre_buf, post_buf;
  od_encode_checkpoint(&x->daala_enc, &pre_buf);
  od_encode_checkpoint(&x->daala_enc, &post_buf);
#endif

  assert(bsize < BLOCK_8X8);
  assert(tx_width < 8 || tx_height < 8);
#if CONFIG_EXT_TX && CONFIG_RECT_TX
  assert(tx_width == pred_block_width && tx_height == pred_block_height);
#else
  assert(tx_width == 4 && tx_height == 4);
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX

  memcpy(ta, a, pred_width_in_transform_blocks * sizeof(a[0]));
  memcpy(tl, l, pred_height_in_transform_blocks * sizeof(l[0]));

  xd->mi[0]->mbmi.tx_size = tx_size;

#if CONFIG_PALETTE
  xd->mi[0]->mbmi.palette_mode_info.palette_size[0] = 0;
#endif  // CONFIG_PALETTE

#if CONFIG_AOM_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    for (mode = DC_PRED; mode <= TM_PRED; ++mode) {
      int64_t this_rd;
      int ratey = 0;
      int64_t distortion = 0;
      int rate = bmode_costs[mode];
      int can_skip = 1;

      if (!(cpi->sf.intra_y_mode_mask[txsize_sqr_up_map[tx_size]] &
            (1 << mode)))
        continue;

      // Only do the oblique modes if the best so far is
      // one of the neighboring directional modes
      if (cpi->sf.mode_search_skip_flags & FLAG_SKIP_INTRA_DIRMISMATCH) {
        if (conditional_skipintra(mode, *best_mode)) continue;
      }

      memcpy(tempa, ta, pred_width_in_transform_blocks * sizeof(ta[0]));
      memcpy(templ, tl, pred_height_in_transform_blocks * sizeof(tl[0]));

      for (idy = 0; idy < pred_height_in_transform_blocks; ++idy) {
        for (idx = 0; idx < pred_width_in_transform_blocks; ++idx) {
          const int block_raster_idx = (row + idy) * 2 + (col + idx);
          const int block =
              av1_raster_order_to_block_index(tx_size, block_raster_idx);
          const uint8_t *const src = &src_init[idx * 4 + idy * 4 * src_stride];
          uint8_t *const dst = &dst_init[idx * 4 + idy * 4 * dst_stride];
          int16_t *const src_diff = av1_raster_block_offset_int16(
              BLOCK_8X8, block_raster_idx, p->src_diff);
          int skip;
          assert(block < 4);
          assert(IMPLIES(tx_size == TX_4X8 || tx_size == TX_8X4,
                         idx == 0 && idy == 0));
          assert(IMPLIES(tx_size == TX_4X8 || tx_size == TX_8X4,
                         block == 0 || block == 2));
          xd->mi[0]->bmi[block_raster_idx].as_mode = mode;
          av1_predict_intra_block(
              xd, pd->width, pd->height, txsize_to_bsize[tx_size], mode, dst,
              dst_stride, dst, dst_stride, col + idx, row + idy, 0);
          aom_highbd_subtract_block(tx_height, tx_width, src_diff, 8, src,
                                    src_stride, dst, dst_stride, xd->bd);
          if (is_lossless) {
            TX_TYPE tx_type =
                get_tx_type(PLANE_TYPE_Y, xd, block_raster_idx, tx_size);
            const SCAN_ORDER *scan_order = get_scan(cm, tx_size, tx_type, 0);
            const int coeff_ctx =
                combine_entropy_contexts(tempa[idx], templ[idy]);
#if CONFIG_NEW_QUANT
            av1_xform_quant(cm, x, 0, block, row + idy, col + idx, BLOCK_8X8,
                            tx_size, coeff_ctx, AV1_XFORM_QUANT_FP_NUQ);
#else
            av1_xform_quant(cm, x, 0, block, row + idy, col + idx, BLOCK_8X8,
                            tx_size, coeff_ctx, AV1_XFORM_QUANT_FP);
#endif  // CONFIG_NEW_QUANT
            ratey += av1_cost_coeffs(cm, x, 0, block, coeff_ctx, tx_size,
                                     scan_order->scan, scan_order->neighbors,
                                     cpi->sf.use_fast_coef_costing);
            skip = (p->eobs[block] == 0);
            can_skip &= skip;
            tempa[idx] = !skip;
            templ[idy] = !skip;
#if CONFIG_EXT_TX
            if (tx_size == TX_8X4) {
              tempa[idx + 1] = tempa[idx];
            } else if (tx_size == TX_4X8) {
              templ[idy + 1] = templ[idy];
            }
#endif  // CONFIG_EXT_TX

            if (RDCOST(x->rdmult, x->rddiv, ratey, distortion) >= best_rd)
              goto next_highbd;
            highbd_inv_txfm_func(BLOCK_OFFSET(pd->dqcoeff, block), dst,
                                 dst_stride, p->eobs[block], xd->bd, DCT_DCT,
                                 1);
          } else {
            int64_t dist;
            unsigned int tmp;
            TX_TYPE tx_type =
                get_tx_type(PLANE_TYPE_Y, xd, block_raster_idx, tx_size);
            const SCAN_ORDER *scan_order = get_scan(cm, tx_size, tx_type, 0);
            const int coeff_ctx =
                combine_entropy_contexts(tempa[idx], templ[idy]);
#if CONFIG_NEW_QUANT
            av1_xform_quant(cm, x, 0, block, row + idy, col + idx, BLOCK_8X8,
                            tx_size, coeff_ctx, AV1_XFORM_QUANT_FP_NUQ);
#else
            av1_xform_quant(cm, x, 0, block, row + idy, col + idx, BLOCK_8X8,
                            tx_size, coeff_ctx, AV1_XFORM_QUANT_FP);
#endif  // CONFIG_NEW_QUANT
            av1_optimize_b(cm, x, 0, block, tx_size, coeff_ctx);
            ratey += av1_cost_coeffs(cm, x, 0, block, coeff_ctx, tx_size,
                                     scan_order->scan, scan_order->neighbors,
                                     cpi->sf.use_fast_coef_costing);
            skip = (p->eobs[block] == 0);
            can_skip &= skip;
            tempa[idx] = !skip;
            templ[idy] = !skip;
#if CONFIG_EXT_TX
            if (tx_size == TX_8X4) {
              tempa[idx + 1] = tempa[idx];
            } else if (tx_size == TX_4X8) {
              templ[idy + 1] = templ[idy];
            }
#endif  // CONFIG_EXT_TX
            highbd_inv_txfm_func(BLOCK_OFFSET(pd->dqcoeff, block), dst,
                                 dst_stride, p->eobs[block], xd->bd, tx_type,
                                 0);
            cpi->fn_ptr[sub_bsize].vf(src, src_stride, dst, dst_stride, &tmp);
            dist = (int64_t)tmp << 4;
            distortion += dist;
            if (RDCOST(x->rdmult, x->rddiv, ratey, distortion) >= best_rd)
              goto next_highbd;
          }
        }
      }

      rate += ratey;
      this_rd = RDCOST(x->rdmult, x->rddiv, rate, distortion);

      if (this_rd < best_rd) {
        *bestrate = rate;
        *bestratey = ratey;
        *bestdistortion = distortion;
        best_rd = this_rd;
        best_can_skip = can_skip;
        *best_mode = mode;
        memcpy(a, tempa, pred_width_in_transform_blocks * sizeof(tempa[0]));
        memcpy(l, templ, pred_height_in_transform_blocks * sizeof(templ[0]));
        for (idy = 0; idy < pred_height_in_transform_blocks * 4; ++idy) {
          memcpy(best_dst16 + idy * 8,
                 CONVERT_TO_SHORTPTR(dst_init + idy * dst_stride),
                 pred_width_in_transform_blocks * 4 * sizeof(uint16_t));
        }
      }
    next_highbd : {}
    }

    if (best_rd >= rd_thresh) return best_rd;

    if (y_skip) *y_skip &= best_can_skip;

    for (idy = 0; idy < pred_height_in_transform_blocks * 4; ++idy) {
      memcpy(CONVERT_TO_SHORTPTR(dst_init + idy * dst_stride),
             best_dst16 + idy * 8,
             pred_width_in_transform_blocks * 4 * sizeof(uint16_t));
    }

    return best_rd;
  }
#endif  // CONFIG_AOM_HIGHBITDEPTH

#if CONFIG_PVQ
  od_encode_checkpoint(&x->daala_enc, &pre_buf);
#endif

  for (mode = DC_PRED; mode <= TM_PRED; ++mode) {
    int64_t this_rd;
    int ratey = 0;
    int64_t distortion = 0;
    int rate = bmode_costs[mode];
    int can_skip = 1;

    if (!(cpi->sf.intra_y_mode_mask[txsize_sqr_up_map[tx_size]] &
          (1 << mode))) {
      continue;
    }

    // Only do the oblique modes if the best so far is
    // one of the neighboring directional modes
    if (cpi->sf.mode_search_skip_flags & FLAG_SKIP_INTRA_DIRMISMATCH) {
      if (conditional_skipintra(mode, *best_mode)) continue;
    }

    memcpy(tempa, ta, pred_width_in_transform_blocks * sizeof(ta[0]));
    memcpy(templ, tl, pred_height_in_transform_blocks * sizeof(tl[0]));

    for (idy = 0; idy < pred_height_in_4x4_blocks; idy += tx_height_unit) {
      for (idx = 0; idx < pred_width_in_4x4_blocks; idx += tx_width_unit) {
        const int block_raster_idx = (row + idy) * 2 + (col + idx);
        int block = av1_raster_order_to_block_index(tx_size, block_raster_idx);
        const uint8_t *const src = &src_init[idx * 4 + idy * 4 * src_stride];
        uint8_t *const dst = &dst_init[idx * 4 + idy * 4 * dst_stride];
#if !CONFIG_PVQ
        int16_t *const src_diff = av1_raster_block_offset_int16(
            BLOCK_8X8, block_raster_idx, p->src_diff);
#else
        int i, j;
#endif
        int skip;
        assert(block < 4);
        assert(IMPLIES(tx_size == TX_4X8 || tx_size == TX_8X4,
                       idx == 0 && idy == 0));
        assert(IMPLIES(tx_size == TX_4X8 || tx_size == TX_8X4,
                       block == 0 || block == 2));
        xd->mi[0]->bmi[block_raster_idx].as_mode = mode;
        av1_predict_intra_block(xd, pd->width, pd->height,
                                txsize_to_bsize[tx_size], mode, dst, dst_stride,
                                dst, dst_stride,
#if CONFIG_CB4X4
                                2 * (col + idx), 2 * (row + idy),
#else
                                col + idx, row + idy,
#endif
                                0);
#if !CONFIG_PVQ
        aom_subtract_block(tx_height, tx_width, src_diff, 8, src, src_stride,
                           dst, dst_stride);
#endif

        if (is_lossless) {
          TX_TYPE tx_type =
              get_tx_type(PLANE_TYPE_Y, xd, block_raster_idx, tx_size);
          const SCAN_ORDER *scan_order = get_scan(cm, tx_size, tx_type, 0);
          const int coeff_ctx =
              combine_entropy_contexts(tempa[idx], templ[idy]);
#if CONFIG_CB4X4
          block = 4 * block;
#endif
#if !CONFIG_PVQ
#if CONFIG_NEW_QUANT
          av1_xform_quant(cm, x, 0, block, row + idy, col + idx, BLOCK_8X8,
                          tx_size, coeff_ctx, AV1_XFORM_QUANT_B_NUQ);
#else
          av1_xform_quant(cm, x, 0, block,
#if CONFIG_CB4X4
                          2 * (row + idy), 2 * (col + idx),
#else
                          row + idy, col + idx,
#endif
                          BLOCK_8X8, tx_size, coeff_ctx, AV1_XFORM_QUANT_B);
#endif  // CONFIG_NEW_QUANT
          ratey += av1_cost_coeffs(cm, x, 0, block, coeff_ctx, tx_size,
                                   scan_order->scan, scan_order->neighbors,
                                   cpi->sf.use_fast_coef_costing);
          skip = (p->eobs[block] == 0);
          can_skip &= skip;
          tempa[idx] = !skip;
          templ[idy] = !skip;
#if CONFIG_EXT_TX
          if (tx_size == TX_8X4) {
            tempa[idx + 1] = tempa[idx];
          } else if (tx_size == TX_4X8) {
            templ[idy + 1] = templ[idy];
          }
#endif  // CONFIG_EXT_TX
#else
          (void)scan_order;

          av1_xform_quant(cm, x, 0, block,
#if CONFIG_CB4X4
                          2 * (row + idy), 2 * (col + idx),
#else
                          row + idy, col + idx,
#endif
                          BLOCK_8X8, tx_size, coeff_ctx, AV1_XFORM_QUANT_B);

          ratey += x->rate;
          skip = x->pvq_skip[0];
          tempa[idx] = !skip;
          templ[idy] = !skip;
          can_skip &= skip;
#endif
          if (RDCOST(x->rdmult, x->rddiv, ratey, distortion) >= best_rd)
            goto next;
#if CONFIG_PVQ
          if (!skip) {
            for (j = 0; j < tx_height; j++)
              for (i = 0; i < tx_width; i++) dst[j * dst_stride + i] = 0;
#endif
            inv_txfm_func(BLOCK_OFFSET(pd->dqcoeff, block), dst, dst_stride,
                          p->eobs[block], DCT_DCT, 1);
#if CONFIG_PVQ
          }
#endif
        } else {
          int64_t dist;
          unsigned int tmp;
          TX_TYPE tx_type =
              get_tx_type(PLANE_TYPE_Y, xd, block_raster_idx, tx_size);
          const SCAN_ORDER *scan_order = get_scan(cm, tx_size, tx_type, 0);
          const int coeff_ctx =
              combine_entropy_contexts(tempa[idx], templ[idy]);
#if CONFIG_CB4X4
          block = 4 * block;
#endif
#if !CONFIG_PVQ
#if CONFIG_NEW_QUANT
          av1_xform_quant(cm, x, 0, block, row + idy, col + idx, BLOCK_8X8,
                          tx_size, coeff_ctx, AV1_XFORM_QUANT_FP_NUQ);
#else
          av1_xform_quant(cm, x, 0, block,
#if CONFIG_CB4X4
                          2 * (row + idy), 2 * (col + idx),
#else
                          row + idy, col + idx,
#endif
                          BLOCK_8X8, tx_size, coeff_ctx, AV1_XFORM_QUANT_FP);
#endif  // CONFIG_NEW_QUANT
          av1_optimize_b(cm, x, 0, block, tx_size, coeff_ctx);
          ratey += av1_cost_coeffs(cm, x, 0, block, coeff_ctx, tx_size,
                                   scan_order->scan, scan_order->neighbors,
                                   cpi->sf.use_fast_coef_costing);
          skip = (p->eobs[block] == 0);
          can_skip &= skip;
          tempa[idx] = !skip;
          templ[idy] = !skip;
#if CONFIG_EXT_TX
          if (tx_size == TX_8X4) {
            tempa[idx + 1] = tempa[idx];
          } else if (tx_size == TX_4X8) {
            templ[idy + 1] = templ[idy];
          }
#endif  // CONFIG_EXT_TX
#else
          (void)scan_order;

          av1_xform_quant(cm, x, 0, block,
#if CONFIG_CB4X4
                          2 * (row + idy), 2 * (col + idx),
#else
                          row + idy, col + idx,
#endif
                          BLOCK_8X8, tx_size, coeff_ctx, AV1_XFORM_QUANT_FP);
          ratey += x->rate;
          skip = x->pvq_skip[0];
          tempa[idx] = !skip;
          templ[idy] = !skip;
          can_skip &= skip;
#endif
#if CONFIG_PVQ
          if (!skip) {
            for (j = 0; j < tx_height; j++)
              for (i = 0; i < tx_width; i++) dst[j * dst_stride + i] = 0;
#endif
            inv_txfm_func(BLOCK_OFFSET(pd->dqcoeff, block), dst, dst_stride,
                          p->eobs[block], tx_type, 0);
#if CONFIG_PVQ
          }
#endif
          // No need for av1_block_error2_c because the ssz is unused
          cpi->fn_ptr[sub_bsize].vf(src, src_stride, dst, dst_stride, &tmp);
          dist = (int64_t)tmp << 4;
          distortion += dist;
          // To use the pixel domain distortion, the step below needs to be
          // put behind the inv txfm. Compared to calculating the distortion
          // in the frequency domain, the overhead of encoding effort is low.
          if (RDCOST(x->rdmult, x->rddiv, ratey, distortion) >= best_rd)
            goto next;
        }
      }
    }

    rate += ratey;
    this_rd = RDCOST(x->rdmult, x->rddiv, rate, distortion);

    if (this_rd < best_rd) {
      *bestrate = rate;
      *bestratey = ratey;
      *bestdistortion = distortion;
      best_rd = this_rd;
      best_can_skip = can_skip;
      *best_mode = mode;
      memcpy(a, tempa, pred_width_in_transform_blocks * sizeof(tempa[0]));
      memcpy(l, templ, pred_height_in_transform_blocks * sizeof(templ[0]));
#if CONFIG_PVQ
      od_encode_checkpoint(&x->daala_enc, &post_buf);
#endif
      for (idy = 0; idy < pred_height_in_transform_blocks * 4; ++idy)
        memcpy(best_dst + idy * 8, dst_init + idy * dst_stride,
               pred_width_in_transform_blocks * 4);
    }
  next : {}
#if CONFIG_PVQ
    od_encode_rollback(&x->daala_enc, &pre_buf);
#endif
  }  // mode decision loop

  if (best_rd >= rd_thresh) return best_rd;

#if CONFIG_PVQ
  od_encode_rollback(&x->daala_enc, &post_buf);
#endif

  if (y_skip) *y_skip &= best_can_skip;

  for (idy = 0; idy < pred_height_in_transform_blocks * 4; ++idy)
    memcpy(dst_init + idy * dst_stride, best_dst + idy * 8,
           pred_width_in_transform_blocks * 4);

  return best_rd;
}

static int64_t rd_pick_intra_sub_8x8_y_mode(const AV1_COMP *const cpi,
                                            MACROBLOCK *mb, int *rate,
                                            int *rate_y, int64_t *distortion,
                                            int *y_skip, int64_t best_rd) {
  const MACROBLOCKD *const xd = &mb->e_mbd;
  MODE_INFO *const mic = xd->mi[0];
  const MODE_INFO *above_mi = xd->above_mi;
  const MODE_INFO *left_mi = xd->left_mi;
  MB_MODE_INFO *const mbmi = &mic->mbmi;
  const BLOCK_SIZE bsize = mbmi->sb_type;
  const int pred_width_in_4x4_blocks = num_4x4_blocks_wide_lookup[bsize];
  const int pred_height_in_4x4_blocks = num_4x4_blocks_high_lookup[bsize];
  int idx, idy;
  int cost = 0;
  int64_t total_distortion = 0;
  int tot_rate_y = 0;
  int64_t total_rd = 0;
  const int *bmode_costs = cpi->mbmode_cost[0];
  const int is_lossless = xd->lossless[mbmi->segment_id];
#if CONFIG_EXT_TX && CONFIG_RECT_TX
  const TX_SIZE tx_size = is_lossless ? TX_4X4 : max_txsize_rect_lookup[bsize];
#else
  const TX_SIZE tx_size = TX_4X4;
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX

#if CONFIG_EXT_INTRA
#if CONFIG_INTRA_INTERP
  mbmi->intra_filter = INTRA_FILTER_LINEAR;
#endif  // CONFIG_INTRA_INTERP
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
  mbmi->filter_intra_mode_info.use_filter_intra_mode[0] = 0;
#endif  // CONFIG_FILTER_INTRA

  // TODO(any): Add search of the tx_type to improve rd performance at the
  // expense of speed.
  mbmi->tx_type = DCT_DCT;
  mbmi->tx_size = tx_size;

  if (y_skip) *y_skip = 1;

  // Pick modes for each prediction sub-block (of size 4x4, 4x8, or 8x4) in this
  // 8x8 coding block.
  for (idy = 0; idy < 2; idy += pred_height_in_4x4_blocks) {
    for (idx = 0; idx < 2; idx += pred_width_in_4x4_blocks) {
      PREDICTION_MODE best_mode = DC_PRED;
      int r = INT_MAX, ry = INT_MAX;
      int64_t d = INT64_MAX, this_rd = INT64_MAX;
      int j;
      const int pred_block_idx = idy * 2 + idx;
      if (cpi->common.frame_type == KEY_FRAME) {
        const PREDICTION_MODE A =
            av1_above_block_mode(mic, above_mi, pred_block_idx);
        const PREDICTION_MODE L =
            av1_left_block_mode(mic, left_mi, pred_block_idx);

        bmode_costs = cpi->y_mode_costs[A][L];
      }

      this_rd = rd_pick_intra_sub_8x8_y_subblock_mode(
          cpi, mb, idy, idx, &best_mode, bmode_costs,
          xd->plane[0].above_context + idx, xd->plane[0].left_context + idy, &r,
          &ry, &d, bsize, tx_size, y_skip, best_rd - total_rd);
#if !CONFIG_DAALA_DIST
      if (this_rd >= best_rd - total_rd) return INT64_MAX;
#endif
      total_rd += this_rd;
      cost += r;
      total_distortion += d;
      tot_rate_y += ry;

      mic->bmi[pred_block_idx].as_mode = best_mode;
      for (j = 1; j < pred_height_in_4x4_blocks; ++j)
        mic->bmi[pred_block_idx + j * 2].as_mode = best_mode;
      for (j = 1; j < pred_width_in_4x4_blocks; ++j)
        mic->bmi[pred_block_idx + j].as_mode = best_mode;

      if (total_rd >= best_rd) return INT64_MAX;
    }
  }
  mbmi->mode = mic->bmi[3].as_mode;

#if CONFIG_DAALA_DIST
  {
    const struct macroblock_plane *p = &mb->plane[0];
    const struct macroblockd_plane *pd = &xd->plane[0];
    const int src_stride = p->src.stride;
    const int dst_stride = pd->dst.stride;
    uint8_t *src = p->src.buf;
    uint8_t *dst = pd->dst.buf;
    int use_activity_masking = 0;
    int qm = OD_HVS_QM;

#if CONFIG_PVQ
    use_activity_masking = mb->daala_enc.use_activity_masking;
#endif
    // Daala-defined distortion computed for the block of 8x8 pixels
    total_distortion = av1_daala_dist(src, src_stride, dst, dst_stride, TX_8X8,
                                      qm, use_activity_masking, mb->qindex)
                       << 4;
  }
#endif
  // Add in the cost of the transform type
  if (!is_lossless) {
    int rate_tx_type = 0;
#if CONFIG_EXT_TX
    if (get_ext_tx_types(tx_size, bsize, 0) > 1) {
      const int eset = get_ext_tx_set(tx_size, bsize, 0);
      rate_tx_type = cpi->intra_tx_type_costs[eset][txsize_sqr_map[tx_size]]
                                             [mbmi->mode][mbmi->tx_type];
    }
#else
    rate_tx_type =
        cpi->intra_tx_type_costs[txsize_sqr_map[tx_size]]
                                [intra_mode_to_tx_type_context[mbmi->mode]]
                                [mbmi->tx_type];
#endif
    assert(mbmi->tx_size == tx_size);
    cost += rate_tx_type;
    tot_rate_y += rate_tx_type;
  }

  *rate = cost;
  *rate_y = tot_rate_y;
  *distortion = total_distortion;

  return RDCOST(mb->rdmult, mb->rddiv, cost, total_distortion);
}

#if CONFIG_FILTER_INTRA
// Return 1 if an filter intra mode is selected; return 0 otherwise.
static int rd_pick_filter_intra_sby(const AV1_COMP *const cpi, MACROBLOCK *x,
                                    int *rate, int *rate_tokenonly,
                                    int64_t *distortion, int *skippable,
                                    BLOCK_SIZE bsize, int mode_cost,
                                    int64_t *best_rd, int64_t *best_model_rd,
                                    uint16_t skip_mask) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MODE_INFO *const mic = xd->mi[0];
  MB_MODE_INFO *mbmi = &mic->mbmi;
  int filter_intra_selected_flag = 0;
  FILTER_INTRA_MODE mode;
  TX_SIZE best_tx_size = TX_4X4;
  FILTER_INTRA_MODE_INFO filter_intra_mode_info;
  TX_TYPE best_tx_type;

  av1_zero(filter_intra_mode_info);
  mbmi->filter_intra_mode_info.use_filter_intra_mode[0] = 1;
  mbmi->mode = DC_PRED;
#if CONFIG_PALETTE
  mbmi->palette_mode_info.palette_size[0] = 0;
#endif  // CONFIG_PALETTE

  for (mode = 0; mode < FILTER_INTRA_MODES; ++mode) {
    int this_rate;
    int64_t this_rd, this_model_rd;
    RD_STATS tokenonly_rd_stats;
    if (skip_mask & (1 << mode)) continue;
    mbmi->filter_intra_mode_info.filter_intra_mode[0] = mode;
    this_model_rd = intra_model_yrd(cpi, x, bsize, mode_cost);
    if (*best_model_rd != INT64_MAX &&
        this_model_rd > *best_model_rd + (*best_model_rd >> 1))
      continue;
    if (this_model_rd < *best_model_rd) *best_model_rd = this_model_rd;
    super_block_yrd(cpi, x, &tokenonly_rd_stats, bsize, *best_rd);
    if (tokenonly_rd_stats.rate == INT_MAX) continue;
    this_rate = tokenonly_rd_stats.rate +
                av1_cost_bit(cpi->common.fc->filter_intra_probs[0], 1) +
                write_uniform_cost(FILTER_INTRA_MODES, mode) + mode_cost;
    this_rd = RDCOST(x->rdmult, x->rddiv, this_rate, tokenonly_rd_stats.dist);

    if (this_rd < *best_rd) {
      *best_rd = this_rd;
      best_tx_size = mic->mbmi.tx_size;
      filter_intra_mode_info = mbmi->filter_intra_mode_info;
      best_tx_type = mic->mbmi.tx_type;
      *rate = this_rate;
      *rate_tokenonly = tokenonly_rd_stats.rate;
      *distortion = tokenonly_rd_stats.dist;
      *skippable = tokenonly_rd_stats.skip;
      filter_intra_selected_flag = 1;
    }
  }

  if (filter_intra_selected_flag) {
    mbmi->mode = DC_PRED;
    mbmi->tx_size = best_tx_size;
    mbmi->filter_intra_mode_info.use_filter_intra_mode[0] =
        filter_intra_mode_info.use_filter_intra_mode[0];
    mbmi->filter_intra_mode_info.filter_intra_mode[0] =
        filter_intra_mode_info.filter_intra_mode[0];
    mbmi->tx_type = best_tx_type;
    return 1;
  } else {
    return 0;
  }
}
#endif  // CONFIG_FILTER_INTRA

#if CONFIG_EXT_INTRA
// Run RD calculation with given luma intra prediction angle., and return
// the RD cost. Update the best mode info. if the RD cost is the best so far.
static int64_t calc_rd_given_intra_angle(
    const AV1_COMP *const cpi, MACROBLOCK *x, BLOCK_SIZE bsize, int mode_cost,
    int64_t best_rd_in, int8_t angle_delta, int max_angle_delta, int *rate,
    RD_STATS *rd_stats, int *best_angle_delta, TX_SIZE *best_tx_size,
    TX_TYPE *best_tx_type,
#if CONFIG_INTRA_INTERP
    INTRA_FILTER *best_filter,
#endif  // CONFIG_INTRA_INTERP
    int64_t *best_rd, int64_t *best_model_rd) {
  int this_rate;
  RD_STATS tokenonly_rd_stats;
  int64_t this_rd, this_model_rd;
  MB_MODE_INFO *mbmi = &x->e_mbd.mi[0]->mbmi;

  mbmi->angle_delta[0] = angle_delta;
  this_model_rd = intra_model_yrd(cpi, x, bsize, mode_cost);
  if (*best_model_rd != INT64_MAX &&
      this_model_rd > *best_model_rd + (*best_model_rd >> 1))
    return INT64_MAX;
  if (this_model_rd < *best_model_rd) *best_model_rd = this_model_rd;
  super_block_yrd(cpi, x, &tokenonly_rd_stats, bsize, best_rd_in);
  if (tokenonly_rd_stats.rate == INT_MAX) return INT64_MAX;

  this_rate = tokenonly_rd_stats.rate + mode_cost +
              write_uniform_cost(2 * max_angle_delta + 1,
                                 mbmi->angle_delta[0] + max_angle_delta);
  this_rd = RDCOST(x->rdmult, x->rddiv, this_rate, tokenonly_rd_stats.dist);

  if (this_rd < *best_rd) {
    *best_rd = this_rd;
    *best_angle_delta = mbmi->angle_delta[0];
    *best_tx_size = mbmi->tx_size;
#if CONFIG_INTRA_INTERP
    *best_filter = mbmi->intra_filter;
#endif  // CONFIG_INTRA_INTERP
    *best_tx_type = mbmi->tx_type;
    *rate = this_rate;
    rd_stats->rate = tokenonly_rd_stats.rate;
    rd_stats->dist = tokenonly_rd_stats.dist;
    rd_stats->skip = tokenonly_rd_stats.skip;
  }
  return this_rd;
}

// With given luma directional intra prediction mode, pick the best angle delta
// Return the RD cost corresponding to the best angle delta.
static int64_t rd_pick_intra_angle_sby(const AV1_COMP *const cpi, MACROBLOCK *x,
                                       int *rate, RD_STATS *rd_stats,
                                       BLOCK_SIZE bsize, int mode_cost,
                                       int64_t best_rd,
                                       int64_t *best_model_rd) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MODE_INFO *const mic = xd->mi[0];
  MB_MODE_INFO *mbmi = &mic->mbmi;
  int i, angle_delta, best_angle_delta = 0;
  const int max_angle_delta = av1_get_max_angle_delta(bsize, 0);
  int first_try = 1;
#if CONFIG_INTRA_INTERP
  int p_angle;
  const int intra_filter_ctx = av1_get_pred_context_intra_interp(xd);
  INTRA_FILTER filter, best_filter = INTRA_FILTER_LINEAR;
#endif  // CONFIG_INTRA_INTERP
  int64_t this_rd, best_rd_in, rd_cost[16];
  TX_SIZE best_tx_size = mic->mbmi.tx_size;
  TX_TYPE best_tx_type = mbmi->tx_type;

  for (i = 0; i < 2 * (max_angle_delta + 2); ++i) rd_cost[i] = INT64_MAX;

  for (angle_delta = 0; angle_delta <= max_angle_delta; angle_delta += 2) {
#if CONFIG_INTRA_INTERP
    for (filter = INTRA_FILTER_LINEAR; filter < INTRA_FILTERS; ++filter) {
      if (FILTER_FAST_SEARCH && filter != INTRA_FILTER_LINEAR) continue;
      mic->mbmi.intra_filter = filter;
#endif  // CONFIG_INTRA_INTERP
      for (i = 0; i < 2; ++i) {
        best_rd_in = (best_rd == INT64_MAX)
                         ? INT64_MAX
                         : (best_rd + (best_rd >> (first_try ? 3 : 5)));
        this_rd = calc_rd_given_intra_angle(
            cpi, x, bsize,
#if CONFIG_INTRA_INTERP
            mode_cost + cpi->intra_filter_cost[intra_filter_ctx][filter],
#else
          mode_cost,
#endif  // CONFIG_INTRA_INTERP
            best_rd_in, (1 - 2 * i) * angle_delta, max_angle_delta, rate,
            rd_stats, &best_angle_delta, &best_tx_size, &best_tx_type,
#if CONFIG_INTRA_INTERP
            &best_filter,
#endif  // CONFIG_INTRA_INTERP
            &best_rd, best_model_rd);
        rd_cost[2 * angle_delta + i] = this_rd;
        if (first_try && this_rd == INT64_MAX) return best_rd;
        first_try = 0;
        if (angle_delta == 0) {
          rd_cost[1] = this_rd;
          break;
        }
      }
#if CONFIG_INTRA_INTERP
    }
#endif  // CONFIG_INTRA_INTERP
  }

  assert(best_rd != INT64_MAX);
  for (angle_delta = 1; angle_delta <= max_angle_delta; angle_delta += 2) {
    int64_t rd_thresh;
#if CONFIG_INTRA_INTERP
    for (filter = INTRA_FILTER_LINEAR; filter < INTRA_FILTERS; ++filter) {
      if (FILTER_FAST_SEARCH && filter != INTRA_FILTER_LINEAR) continue;
      mic->mbmi.intra_filter = filter;
#endif  // CONFIG_INTRA_INTERP
      for (i = 0; i < 2; ++i) {
        int skip_search = 0;
        rd_thresh = best_rd + (best_rd >> 5);
        if (rd_cost[2 * (angle_delta + 1) + i] > rd_thresh &&
            rd_cost[2 * (angle_delta - 1) + i] > rd_thresh)
          skip_search = 1;
        if (!skip_search) {
          this_rd = calc_rd_given_intra_angle(
              cpi, x, bsize,
#if CONFIG_INTRA_INTERP
              mode_cost + cpi->intra_filter_cost[intra_filter_ctx][filter],
#else
            mode_cost,
#endif  // CONFIG_INTRA_INTERP
              best_rd, (1 - 2 * i) * angle_delta, max_angle_delta, rate,
              rd_stats, &best_angle_delta, &best_tx_size, &best_tx_type,
#if CONFIG_INTRA_INTERP
              &best_filter,
#endif  // CONFIG_INTRA_INTERP
              &best_rd, best_model_rd);
        }
      }
#if CONFIG_INTRA_INTERP
    }
#endif  // CONFIG_INTRA_INTERP
  }

#if CONFIG_INTRA_INTERP
  if (FILTER_FAST_SEARCH && rd_stats->rate < INT_MAX) {
    p_angle = mode_to_angle_map[mbmi->mode] +
              best_angle_delta * av1_get_angle_step(bsize, 0);
    if (av1_is_intra_filter_switchable(p_angle)) {
      for (filter = INTRA_FILTER_LINEAR + 1; filter < INTRA_FILTERS; ++filter) {
        mic->mbmi.intra_filter = filter;
        this_rd = calc_rd_given_intra_angle(
            cpi, x, bsize,
            mode_cost + cpi->intra_filter_cost[intra_filter_ctx][filter],
            best_rd, best_angle_delta, max_angle_delta, rate, rd_stats,
            &best_angle_delta, &best_tx_size, &best_tx_type, &best_filter,
            &best_rd, best_model_rd);
      }
    }
  }
#endif  // CONFIG_INTRA_INTERP

  mbmi->tx_size = best_tx_size;
  mbmi->angle_delta[0] = best_angle_delta;
#if CONFIG_INTRA_INTERP
  mic->mbmi.intra_filter = best_filter;
#endif  // CONFIG_INTRA_INTERP
  mbmi->tx_type = best_tx_type;
  return best_rd;
}

// Indices are sign, integer, and fractional part of the gradient value
static const uint8_t gradient_to_angle_bin[2][7][16] = {
  {
      { 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 0, 0, 0, 0 },
      { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1 },
      { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
      { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
      { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
      { 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 },
      { 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 },
  },
  {
      { 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4 },
      { 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3 },
      { 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 },
      { 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 },
      { 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 },
      { 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2 },
      { 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 },
  },
};

static const uint8_t mode_to_angle_bin[INTRA_MODES] = {
  0, 2, 6, 0, 4, 3, 5, 7, 1, 0,
};

static void angle_estimation(const uint8_t *src, int src_stride, int rows,
                             int cols, uint8_t *directional_mode_skip_mask) {
  int i, r, c, index, dx, dy, temp, sn, remd, quot;
  uint64_t hist[DIRECTIONAL_MODES];
  uint64_t hist_sum = 0;

  memset(hist, 0, DIRECTIONAL_MODES * sizeof(hist[0]));
  src += src_stride;
  for (r = 1; r < rows; ++r) {
    for (c = 1; c < cols; ++c) {
      dx = src[c] - src[c - 1];
      dy = src[c] - src[c - src_stride];
      temp = dx * dx + dy * dy;
      if (dy == 0) {
        index = 2;
      } else {
        sn = (dx > 0) ^ (dy > 0);
        dx = abs(dx);
        dy = abs(dy);
        remd = dx % dy;
        quot = dx / dy;
        remd = remd * 16 / dy;
        index = gradient_to_angle_bin[sn][AOMMIN(quot, 6)][AOMMIN(remd, 15)];
      }
      hist[index] += temp;
    }
    src += src_stride;
  }

  for (i = 0; i < DIRECTIONAL_MODES; ++i) hist_sum += hist[i];
  for (i = 0; i < INTRA_MODES; ++i) {
    if (i != DC_PRED && i != TM_PRED) {
      const uint8_t angle_bin = mode_to_angle_bin[i];
      uint64_t score = 2 * hist[angle_bin];
      int weight = 2;
      if (angle_bin > 0) {
        score += hist[angle_bin - 1];
        ++weight;
      }
      if (angle_bin < DIRECTIONAL_MODES - 1) {
        score += hist[angle_bin + 1];
        ++weight;
      }
      if (score * ANGLE_SKIP_THRESH < hist_sum * weight)
        directional_mode_skip_mask[i] = 1;
    }
  }
}

#if CONFIG_AOM_HIGHBITDEPTH
static void highbd_angle_estimation(const uint8_t *src8, int src_stride,
                                    int rows, int cols,
                                    uint8_t *directional_mode_skip_mask) {
  int i, r, c, index, dx, dy, temp, sn, remd, quot;
  uint64_t hist[DIRECTIONAL_MODES];
  uint64_t hist_sum = 0;
  uint16_t *src = CONVERT_TO_SHORTPTR(src8);

  memset(hist, 0, DIRECTIONAL_MODES * sizeof(hist[0]));
  src += src_stride;
  for (r = 1; r < rows; ++r) {
    for (c = 1; c < cols; ++c) {
      dx = src[c] - src[c - 1];
      dy = src[c] - src[c - src_stride];
      temp = dx * dx + dy * dy;
      if (dy == 0) {
        index = 2;
      } else {
        sn = (dx > 0) ^ (dy > 0);
        dx = abs(dx);
        dy = abs(dy);
        remd = dx % dy;
        quot = dx / dy;
        remd = remd * 16 / dy;
        index = gradient_to_angle_bin[sn][AOMMIN(quot, 6)][AOMMIN(remd, 15)];
      }
      hist[index] += temp;
    }
    src += src_stride;
  }

  for (i = 0; i < DIRECTIONAL_MODES; ++i) hist_sum += hist[i];
  for (i = 0; i < INTRA_MODES; ++i) {
    if (i != DC_PRED && i != TM_PRED) {
      const uint8_t angle_bin = mode_to_angle_bin[i];
      uint64_t score = 2 * hist[angle_bin];
      int weight = 2;
      if (angle_bin > 0) {
        score += hist[angle_bin - 1];
        ++weight;
      }
      if (angle_bin < DIRECTIONAL_MODES - 1) {
        score += hist[angle_bin + 1];
        ++weight;
      }
      if (score * ANGLE_SKIP_THRESH < hist_sum * weight)
        directional_mode_skip_mask[i] = 1;
    }
  }
}
#endif  // CONFIG_AOM_HIGHBITDEPTH
#endif  // CONFIG_EXT_INTRA

// This function is used only for intra_only frames
static int64_t rd_pick_intra_sby_mode(const AV1_COMP *const cpi, MACROBLOCK *x,
                                      int *rate, int *rate_tokenonly,
                                      int64_t *distortion, int *skippable,
                                      BLOCK_SIZE bsize, int64_t best_rd) {
  uint8_t mode_idx;
  MACROBLOCKD *const xd = &x->e_mbd;
  MODE_INFO *const mic = xd->mi[0];
  MB_MODE_INFO *const mbmi = &mic->mbmi;
  MB_MODE_INFO best_mbmi = *mbmi;
  int64_t best_model_rd = INT64_MAX;
#if CONFIG_EXT_INTRA
  const int rows = block_size_high[bsize];
  const int cols = block_size_wide[bsize];
#if CONFIG_INTRA_INTERP
  const int intra_filter_ctx = av1_get_pred_context_intra_interp(xd);
#endif  // CONFIG_INTRA_INTERP
  int is_directional_mode;
  uint8_t directional_mode_skip_mask[INTRA_MODES];
  const int src_stride = x->plane[0].src.stride;
  const uint8_t *src = x->plane[0].src.buf;
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
  int beat_best_rd = 0;
  uint16_t filter_intra_mode_skip_mask = (1 << FILTER_INTRA_MODES) - 1;
#endif  // CONFIG_FILTER_INTRA
  const int *bmode_costs;
#if CONFIG_PALETTE
  PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info;
  uint8_t *best_palette_color_map =
      cpi->common.allow_screen_content_tools
          ? x->palette_buffer->best_palette_color_map
          : NULL;
  int palette_y_mode_ctx = 0;
#endif  // CONFIG_PALETTE
  const MODE_INFO *above_mi = xd->above_mi;
  const MODE_INFO *left_mi = xd->left_mi;
  const PREDICTION_MODE A = av1_above_block_mode(mic, above_mi, 0);
  const PREDICTION_MODE L = av1_left_block_mode(mic, left_mi, 0);
  const PREDICTION_MODE FINAL_MODE_SEARCH = TM_PRED + 1;
#if CONFIG_PVQ
  od_rollback_buffer pre_buf, post_buf;

  od_encode_checkpoint(&x->daala_enc, &pre_buf);
  od_encode_checkpoint(&x->daala_enc, &post_buf);
#endif
  bmode_costs = cpi->y_mode_costs[A][L];

#if CONFIG_EXT_INTRA
  mbmi->angle_delta[0] = 0;
  memset(directional_mode_skip_mask, 0,
         sizeof(directional_mode_skip_mask[0]) * INTRA_MODES);
#if CONFIG_AOM_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)
    highbd_angle_estimation(src, src_stride, rows, cols,
                            directional_mode_skip_mask);
  else
#endif
    angle_estimation(src, src_stride, rows, cols, directional_mode_skip_mask);
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
  mbmi->filter_intra_mode_info.use_filter_intra_mode[0] = 0;
#endif  // CONFIG_FILTER_INTRA
#if CONFIG_PALETTE
  pmi->palette_size[0] = 0;
  if (above_mi)
    palette_y_mode_ctx +=
        (above_mi->mbmi.palette_mode_info.palette_size[0] > 0);
  if (left_mi)
    palette_y_mode_ctx += (left_mi->mbmi.palette_mode_info.palette_size[0] > 0);
#endif  // CONFIG_PALETTE

  if (cpi->sf.tx_type_search.fast_intra_tx_type_search)
    x->use_default_intra_tx_type = 1;
  else
    x->use_default_intra_tx_type = 0;

  /* Y Search for intra prediction mode */
  for (mode_idx = DC_PRED; mode_idx <= FINAL_MODE_SEARCH; ++mode_idx) {
    RD_STATS this_rd_stats;
    int this_rate, this_rate_tokenonly, s;
    int64_t this_distortion, this_rd, this_model_rd;
    if (mode_idx == FINAL_MODE_SEARCH) {
      if (x->use_default_intra_tx_type == 0) break;
      mbmi->mode = best_mbmi.mode;
      x->use_default_intra_tx_type = 0;
    } else {
      mbmi->mode = mode_idx;
    }
#if CONFIG_PVQ
    od_encode_rollback(&x->daala_enc, &pre_buf);
#endif
#if CONFIG_EXT_INTRA
    mbmi->angle_delta[0] = 0;
#endif  // CONFIG_EXT_INTRA
    this_model_rd = intra_model_yrd(cpi, x, bsize, bmode_costs[mbmi->mode]);
    if (best_model_rd != INT64_MAX &&
        this_model_rd > best_model_rd + (best_model_rd >> 1))
      continue;
    if (this_model_rd < best_model_rd) best_model_rd = this_model_rd;
#if CONFIG_EXT_INTRA
    is_directional_mode = av1_is_directional_mode(mbmi->mode, bsize);
    if (is_directional_mode && directional_mode_skip_mask[mbmi->mode]) continue;
    if (is_directional_mode) {
      this_rd_stats.rate = INT_MAX;
      this_rd = rd_pick_intra_angle_sby(cpi, x, &this_rate, &this_rd_stats,
                                        bsize, bmode_costs[mbmi->mode], best_rd,
                                        &best_model_rd);
    } else {
      super_block_yrd(cpi, x, &this_rd_stats, bsize, best_rd);
    }
#else
    super_block_yrd(cpi, x, &this_rd_stats, bsize, best_rd);
#endif  // CONFIG_EXT_INTRA
    this_rate_tokenonly = this_rd_stats.rate;
    this_distortion = this_rd_stats.dist;
    s = this_rd_stats.skip;

    if (this_rate_tokenonly == INT_MAX) continue;

    this_rate = this_rate_tokenonly + bmode_costs[mbmi->mode];

    if (!xd->lossless[mbmi->segment_id] && mbmi->sb_type >= BLOCK_8X8) {
      // super_block_yrd above includes the cost of the tx_size in the
      // tokenonly rate, but for intra blocks, tx_size is always coded
      // (prediction granularity), so we account for it in the full rate,
      // not the tokenonly rate.
      this_rate_tokenonly -= tx_size_cost(cpi, x, bsize, mbmi->tx_size);
    }
#if CONFIG_PALETTE
    if (cpi->common.allow_screen_content_tools && mbmi->mode == DC_PRED)
      this_rate +=
          av1_cost_bit(av1_default_palette_y_mode_prob[bsize - BLOCK_8X8]
                                                      [palette_y_mode_ctx],
                       0);
#endif  // CONFIG_PALETTE
#if CONFIG_FILTER_INTRA
    if (mbmi->mode == DC_PRED)
      this_rate += av1_cost_bit(cpi->common.fc->filter_intra_probs[0], 0);
#endif  // CONFIG_FILTER_INTRA
#if CONFIG_EXT_INTRA
    if (is_directional_mode) {
      const int max_angle_delta = av1_get_max_angle_delta(bsize, 0);
#if CONFIG_INTRA_INTERP
      const int p_angle = mode_to_angle_map[mbmi->mode] +
                          mbmi->angle_delta[0] * av1_get_angle_step(bsize, 0);
      if (av1_is_intra_filter_switchable(p_angle))
        this_rate +=
            cpi->intra_filter_cost[intra_filter_ctx][mbmi->intra_filter];
#endif  // CONFIG_INTRA_INTERP
      this_rate += write_uniform_cost(2 * max_angle_delta + 1,
                                      max_angle_delta + mbmi->angle_delta[0]);
    }
#endif  // CONFIG_EXT_INTRA
    this_rd = RDCOST(x->rdmult, x->rddiv, this_rate, this_distortion);
#if CONFIG_FILTER_INTRA
    if (best_rd == INT64_MAX || this_rd - best_rd < (best_rd >> 4)) {
      filter_intra_mode_skip_mask ^= (1 << mbmi->mode);
    }
#endif  // CONFIG_FILTER_INTRA

    if (this_rd < best_rd) {
      best_mbmi = *mbmi;
      best_rd = this_rd;
#if CONFIG_FILTER_INTRA
      beat_best_rd = 1;
#endif  // CONFIG_FILTER_INTRA
      *rate = this_rate;
      *rate_tokenonly = this_rate_tokenonly;
      *distortion = this_distortion;
      *skippable = s;
#if CONFIG_PVQ
      od_encode_checkpoint(&x->daala_enc, &post_buf);
#endif
    }
  }

#if CONFIG_PVQ
  od_encode_rollback(&x->daala_enc, &post_buf);
#endif

#if CONFIG_PALETTE
  if (cpi->common.allow_screen_content_tools) {
    rd_pick_palette_intra_sby(cpi, x, bsize, palette_y_mode_ctx,
                              bmode_costs[DC_PRED], &best_mbmi,
                              best_palette_color_map, &best_rd, &best_model_rd,
                              rate, rate_tokenonly, distortion, skippable);
  }
#endif  // CONFIG_PALETTE

#if CONFIG_FILTER_INTRA
  if (beat_best_rd) {
    if (rd_pick_filter_intra_sby(cpi, x, rate, rate_tokenonly, distortion,
                                 skippable, bsize, bmode_costs[DC_PRED],
                                 &best_rd, &best_model_rd,
                                 filter_intra_mode_skip_mask)) {
      best_mbmi = *mbmi;
    }
  }
#endif  // CONFIG_FILTER_INTRA

  *mbmi = best_mbmi;
  return best_rd;
}

// Return value 0: early termination triggered, no valid rd cost available;
//              1: rd cost values are valid.
static int super_block_uvrd(const AV1_COMP *const cpi, MACROBLOCK *x,
                            RD_STATS *rd_stats, BLOCK_SIZE bsize,
                            int64_t ref_best_rd) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  const TX_SIZE uv_tx_size = get_uv_tx_size(mbmi, &xd->plane[1]);
  int plane;
  int is_cost_valid = 1;
  av1_init_rd_stats(rd_stats);

  if (ref_best_rd < 0) is_cost_valid = 0;
#if !CONFIG_PVQ
  if (is_inter_block(mbmi) && is_cost_valid) {
    for (plane = 1; plane < MAX_MB_PLANE; ++plane)
      av1_subtract_plane(x, bsize, plane);
  }
#endif

  if (is_cost_valid) {
    for (plane = 1; plane < MAX_MB_PLANE; ++plane) {
      RD_STATS pn_rd_stats;
      txfm_rd_in_plane(x, cpi, &pn_rd_stats, ref_best_rd, plane, bsize,
                       uv_tx_size, cpi->sf.use_fast_coef_costing);
      if (pn_rd_stats.rate == INT_MAX) {
        is_cost_valid = 0;
        break;
      }
      av1_merge_rd_stats(rd_stats, &pn_rd_stats);
      if (RDCOST(x->rdmult, x->rddiv, rd_stats->rate, rd_stats->dist) >
              ref_best_rd &&
          RDCOST(x->rdmult, x->rddiv, 0, rd_stats->sse) > ref_best_rd) {
        is_cost_valid = 0;
        break;
      }
    }
  }

  if (!is_cost_valid) {
    // reset cost value
    av1_invalid_rd_stats(rd_stats);
  }

  return is_cost_valid;
}

#if CONFIG_VAR_TX
void av1_tx_block_rd_b(const AV1_COMP *cpi, MACROBLOCK *x, TX_SIZE tx_size,
                       int blk_row, int blk_col, int plane, int block,
                       int plane_bsize, int coeff_ctx, RD_STATS *rd_stats) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *xd = &x->e_mbd;
  const struct macroblock_plane *const p = &x->plane[plane];
  struct macroblockd_plane *const pd = &xd->plane[plane];
  int64_t tmp;
  tran_low_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
  PLANE_TYPE plane_type = (plane == 0) ? PLANE_TYPE_Y : PLANE_TYPE_UV;
  TX_TYPE tx_type = get_tx_type(plane_type, xd, block, tx_size);
  const SCAN_ORDER *const scan_order =
      get_scan(cm, tx_size, tx_type, is_inter_block(&xd->mi[0]->mbmi));
  BLOCK_SIZE txm_bsize = txsize_to_bsize[tx_size];
  int bh = block_size_high[txm_bsize];
  int bw = block_size_wide[txm_bsize];
  int txb_h = tx_size_high_unit[tx_size];
  int txb_w = tx_size_wide_unit[tx_size];

  int src_stride = p->src.stride;
  uint8_t *src =
      &p->src.buf[(blk_row * src_stride + blk_col) << tx_size_wide_log2[0]];
  uint8_t *dst =
      &pd->dst
           .buf[(blk_row * pd->dst.stride + blk_col) << tx_size_wide_log2[0]];
#if CONFIG_AOM_HIGHBITDEPTH
  DECLARE_ALIGNED(16, uint16_t, rec_buffer16[MAX_TX_SQUARE]);
  uint8_t *rec_buffer;
#else
  DECLARE_ALIGNED(16, uint8_t, rec_buffer[MAX_TX_SQUARE]);
#endif  // CONFIG_AOM_HIGHBITDEPTH
  int max_blocks_high = block_size_high[plane_bsize];
  int max_blocks_wide = block_size_wide[plane_bsize];
  const int diff_stride = max_blocks_wide;
  const int16_t *diff =
      &p->src_diff[(blk_row * diff_stride + blk_col) << tx_size_wide_log2[0]];
  int txb_coeff_cost;

  assert(tx_size < TX_SIZES_ALL);

  if (xd->mb_to_bottom_edge < 0)
    max_blocks_high += xd->mb_to_bottom_edge >> (3 + pd->subsampling_y);
  if (xd->mb_to_right_edge < 0)
    max_blocks_wide += xd->mb_to_right_edge >> (3 + pd->subsampling_x);

  max_blocks_high >>= tx_size_wide_log2[0];
  max_blocks_wide >>= tx_size_wide_log2[0];

#if CONFIG_NEW_QUANT
  av1_xform_quant(cm, x, plane, block, blk_row, blk_col, plane_bsize, tx_size,
                  coeff_ctx, AV1_XFORM_QUANT_FP_NUQ);
#else
  av1_xform_quant(cm, x, plane, block, blk_row, blk_col, plane_bsize, tx_size,
                  coeff_ctx, AV1_XFORM_QUANT_FP);
#endif  // CONFIG_NEW_QUANT

  // TODO(yushin) : If PVQ is enabled, this should not be called.
  av1_optimize_b(cm, x, plane, block, tx_size, coeff_ctx);

// TODO(any): Use dist_block to compute distortion
#if CONFIG_AOM_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    rec_buffer = CONVERT_TO_BYTEPTR(rec_buffer16);
    aom_highbd_convolve_copy(dst, pd->dst.stride, rec_buffer, MAX_TX_SIZE, NULL,
                             0, NULL, 0, bw, bh, xd->bd);
  } else {
    rec_buffer = (uint8_t *)rec_buffer16;
    aom_convolve_copy(dst, pd->dst.stride, rec_buffer, MAX_TX_SIZE, NULL, 0,
                      NULL, 0, bw, bh);
  }
#else
  aom_convolve_copy(dst, pd->dst.stride, rec_buffer, MAX_TX_SIZE, NULL, 0, NULL,
                    0, bw, bh);
#endif  // CONFIG_AOM_HIGHBITDEPTH

  if (blk_row + txb_h > max_blocks_high || blk_col + txb_w > max_blocks_wide) {
    int idx, idy;
    int blocks_height = AOMMIN(txb_h, max_blocks_high - blk_row);
    int blocks_width = AOMMIN(txb_w, max_blocks_wide - blk_col);
    tmp = 0;
    for (idy = 0; idy < blocks_height; ++idy) {
      for (idx = 0; idx < blocks_width; ++idx) {
        const int16_t *d =
            diff + ((idy * diff_stride + idx) << tx_size_wide_log2[0]);
        tmp += sum_squares_2d(d, diff_stride, 0);
      }
    }
  } else {
    tmp = sum_squares_2d(diff, diff_stride, tx_size);
  }

#if CONFIG_AOM_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)
    tmp = ROUND_POWER_OF_TWO(tmp, (xd->bd - 8) * 2);
#endif  // CONFIG_AOM_HIGHBITDEPTH
  rd_stats->sse += tmp * 16;

  if (p->eobs[block] > 0) {
    INV_TXFM_PARAM inv_txfm_param;
    inv_txfm_param.tx_type = tx_type;
    inv_txfm_param.tx_size = tx_size;
    inv_txfm_param.eob = p->eobs[block];
    inv_txfm_param.lossless = xd->lossless[xd->mi[0]->mbmi.segment_id];
// TODO(yushin) : If PVQ is enabled, rec_buffer needs be set as zeros.
#if CONFIG_AOM_HIGHBITDEPTH
    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
      inv_txfm_param.bd = xd->bd;
      highbd_inv_txfm_add(dqcoeff, rec_buffer, MAX_TX_SIZE, &inv_txfm_param);
    } else {
      inv_txfm_add(dqcoeff, rec_buffer, MAX_TX_SIZE, &inv_txfm_param);
    }
#else   // CONFIG_AOM_HIGHBITDEPTH
    inv_txfm_add(dqcoeff, rec_buffer, MAX_TX_SIZE, &inv_txfm_param);
#endif  // CONFIG_AOM_HIGHBITDEPTH

    if (txb_w + blk_col > max_blocks_wide ||
        txb_h + blk_row > max_blocks_high) {
      int idx, idy;
      unsigned int this_dist;
      int blocks_height = AOMMIN(txb_h, max_blocks_high - blk_row);
      int blocks_width = AOMMIN(txb_w, max_blocks_wide - blk_col);
      tmp = 0;
      for (idy = 0; idy < blocks_height; ++idy) {
        for (idx = 0; idx < blocks_width; ++idx) {
          uint8_t *const s =
              src + ((idy * src_stride + idx) << tx_size_wide_log2[0]);
          uint8_t *const r =
              rec_buffer + ((idy * MAX_TX_SIZE + idx) << tx_size_wide_log2[0]);
          cpi->fn_ptr[0].vf(s, src_stride, r, MAX_TX_SIZE, &this_dist);
          tmp += this_dist;
        }
      }
    } else {
      uint32_t this_dist;
      cpi->fn_ptr[txm_bsize].vf(src, src_stride, rec_buffer, MAX_TX_SIZE,
                                &this_dist);
      tmp = this_dist;
    }
  }
  rd_stats->dist += tmp * 16;
  txb_coeff_cost = av1_cost_coeffs(cm, x, plane, block, coeff_ctx, tx_size,
                                   scan_order->scan, scan_order->neighbors, 0);
  rd_stats->rate += txb_coeff_cost;
  rd_stats->skip &= (p->eobs[block] == 0);

#if CONFIG_RD_DEBUG
  av1_update_txb_coeff_cost(rd_stats, plane, tx_size, blk_row, blk_col,
                            txb_coeff_cost);
#endif
}

static void select_tx_block(const AV1_COMP *cpi, MACROBLOCK *x, int blk_row,
                            int blk_col, int plane, int block, int block32,
                            TX_SIZE tx_size, int depth, BLOCK_SIZE plane_bsize,
                            ENTROPY_CONTEXT *ta, ENTROPY_CONTEXT *tl,
                            TXFM_CONTEXT *tx_above, TXFM_CONTEXT *tx_left,
                            RD_STATS *rd_stats, int64_t ref_best_rd,
                            int *is_cost_valid, RD_STATS *rd_stats_stack) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  struct macroblock_plane *const p = &x->plane[plane];
  struct macroblockd_plane *const pd = &xd->plane[plane];
  const int tx_row = blk_row >> (1 - pd->subsampling_y);
  const int tx_col = blk_col >> (1 - pd->subsampling_x);
  TX_SIZE(*const inter_tx_size)
  [MAX_MIB_SIZE] =
      (TX_SIZE(*)[MAX_MIB_SIZE]) & mbmi->inter_tx_size[tx_row][tx_col];
  const int max_blocks_high = max_block_high(xd, plane_bsize, plane);
  const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane);
  const int bw = block_size_wide[plane_bsize] >> tx_size_wide_log2[0];
  int64_t this_rd = INT64_MAX;
  ENTROPY_CONTEXT *pta = ta + blk_col;
  ENTROPY_CONTEXT *ptl = tl + blk_row;
  int coeff_ctx, i;
  int ctx =
      txfm_partition_context(tx_above + (blk_col >> 1),
                             tx_left + (blk_row >> 1), mbmi->sb_type, tx_size);
  int64_t sum_rd = INT64_MAX;
  int tmp_eob = 0;
  int zero_blk_rate;
  RD_STATS sum_rd_stats;
  const int tx_size_ctx = txsize_sqr_map[tx_size];

  av1_init_rd_stats(&sum_rd_stats);

  assert(tx_size < TX_SIZES_ALL);

  if (ref_best_rd < 0) {
    *is_cost_valid = 0;
    return;
  }

  coeff_ctx = get_entropy_context(tx_size, pta, ptl);

  av1_init_rd_stats(rd_stats);

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

  zero_blk_rate = x->token_costs[tx_size_ctx][pd->plane_type][1][0][0]
                                [coeff_ctx][EOB_TOKEN];

  if (cpi->common.tx_mode == TX_MODE_SELECT || tx_size == TX_4X4) {
    inter_tx_size[0][0] = tx_size;

    if (tx_size == TX_32X32 && mbmi->tx_type != DCT_DCT &&
        rd_stats_stack[block32].rate != INT_MAX) {
      *rd_stats = rd_stats_stack[block32];
      p->eobs[block] = !rd_stats->skip;
      x->blk_skip[plane][blk_row * bw + blk_col] = rd_stats->skip;
    } else {
      av1_tx_block_rd_b(cpi, x, tx_size, blk_row, blk_col, plane, block,
                        plane_bsize, coeff_ctx, rd_stats);
      if (tx_size == TX_32X32) {
        rd_stats_stack[block32] = *rd_stats;
      }
    }

    if ((RDCOST(x->rdmult, x->rddiv, rd_stats->rate, rd_stats->dist) >=
             RDCOST(x->rdmult, x->rddiv, zero_blk_rate, rd_stats->sse) ||
         rd_stats->skip == 1) &&
        !xd->lossless[mbmi->segment_id]) {
#if CONFIG_RD_DEBUG
      av1_update_txb_coeff_cost(rd_stats, plane, tx_size, blk_row, blk_col,
                                zero_blk_rate - rd_stats->rate);
#endif
      rd_stats->rate = zero_blk_rate;
      rd_stats->dist = rd_stats->sse;
      rd_stats->skip = 1;
      x->blk_skip[plane][blk_row * bw + blk_col] = 1;
      p->eobs[block] = 0;
    } else {
      x->blk_skip[plane][blk_row * bw + blk_col] = 0;
      rd_stats->skip = 0;
    }

    if (tx_size > TX_4X4 && depth < MAX_VARTX_DEPTH)
      rd_stats->rate +=
          av1_cost_bit(cpi->common.fc->txfm_partition_prob[ctx], 0);
    this_rd = RDCOST(x->rdmult, x->rddiv, rd_stats->rate, rd_stats->dist);
    tmp_eob = p->eobs[block];
  }

  if (tx_size > TX_4X4 && depth < MAX_VARTX_DEPTH) {
    const TX_SIZE sub_txs = sub_tx_size_map[tx_size];
    const int bsl = tx_size_wide_unit[sub_txs];
    int sub_step = tx_size_wide_unit[sub_txs] * tx_size_high_unit[sub_txs];
    RD_STATS this_rd_stats;
    int this_cost_valid = 1;
    int64_t tmp_rd = 0;

    sum_rd_stats.rate =
        av1_cost_bit(cpi->common.fc->txfm_partition_prob[ctx], 1);

    assert(tx_size < TX_SIZES_ALL);

    for (i = 0; i < 4 && this_cost_valid; ++i) {
      int offsetr = blk_row + (i >> 1) * bsl;
      int offsetc = blk_col + (i & 0x01) * bsl;

      if (offsetr >= max_blocks_high || offsetc >= max_blocks_wide) continue;

      select_tx_block(cpi, x, offsetr, offsetc, plane, block, block32, sub_txs,
                      depth + 1, plane_bsize, ta, tl, tx_above, tx_left,
                      &this_rd_stats, ref_best_rd - tmp_rd, &this_cost_valid,
                      rd_stats_stack);

      av1_merge_rd_stats(&sum_rd_stats, &this_rd_stats);

      tmp_rd =
          RDCOST(x->rdmult, x->rddiv, sum_rd_stats.rate, sum_rd_stats.dist);
      if (this_rd < tmp_rd) break;
      block += sub_step;
    }
    if (this_cost_valid) sum_rd = tmp_rd;
  }

  if (this_rd < sum_rd) {
    int idx, idy;
    for (i = 0; i < tx_size_wide_unit[tx_size]; ++i) pta[i] = !(tmp_eob == 0);
    for (i = 0; i < tx_size_high_unit[tx_size]; ++i) ptl[i] = !(tmp_eob == 0);
    txfm_partition_update(tx_above + (blk_col >> 1), tx_left + (blk_row >> 1),
                          tx_size, tx_size);
    inter_tx_size[0][0] = tx_size;
    for (idy = 0; idy < tx_size_high_unit[tx_size] / 2; ++idy)
      for (idx = 0; idx < tx_size_wide_unit[tx_size] / 2; ++idx)
        inter_tx_size[idy][idx] = tx_size;
    mbmi->tx_size = tx_size;
    if (this_rd == INT64_MAX) *is_cost_valid = 0;
    x->blk_skip[plane][blk_row * bw + blk_col] = rd_stats->skip;
  } else {
    *rd_stats = sum_rd_stats;
    if (sum_rd == INT64_MAX) *is_cost_valid = 0;
  }
}

static void inter_block_yrd(const AV1_COMP *cpi, MACROBLOCK *x,
                            RD_STATS *rd_stats, BLOCK_SIZE bsize,
                            int64_t ref_best_rd, RD_STATS *rd_stats_stack) {
  MACROBLOCKD *const xd = &x->e_mbd;
  int is_cost_valid = 1;
  int64_t this_rd = 0;

  if (ref_best_rd < 0) is_cost_valid = 0;

  av1_init_rd_stats(rd_stats);

  if (is_cost_valid) {
    const struct macroblockd_plane *const pd = &xd->plane[0];
    const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
    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];
    const TX_SIZE max_tx_size = max_txsize_rect_lookup[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;
    int block = 0;
    int block32 = 0;
    int step = tx_size_wide_unit[max_tx_size] * tx_size_high_unit[max_tx_size];
    ENTROPY_CONTEXT ctxa[2 * MAX_MIB_SIZE];
    ENTROPY_CONTEXT ctxl[2 * MAX_MIB_SIZE];
    TXFM_CONTEXT tx_above[MAX_MIB_SIZE];
    TXFM_CONTEXT tx_left[MAX_MIB_SIZE];

    RD_STATS pn_rd_stats;
    av1_init_rd_stats(&pn_rd_stats);

    av1_get_entropy_contexts(bsize, 0, pd, ctxa, ctxl);
    memcpy(tx_above, xd->above_txfm_context,
           sizeof(TXFM_CONTEXT) * (mi_width >> 1));
    memcpy(tx_left, xd->left_txfm_context,
           sizeof(TXFM_CONTEXT) * (mi_height >> 1));

    for (idy = 0; idy < mi_height; idy += bh) {
      for (idx = 0; idx < mi_width; idx += bw) {
        select_tx_block(cpi, x, idy, idx, 0, block, block32, max_tx_size,
                        mi_height != mi_width, plane_bsize, ctxa, ctxl,
                        tx_above, tx_left, &pn_rd_stats, ref_best_rd - this_rd,
                        &is_cost_valid, rd_stats_stack);
        av1_merge_rd_stats(rd_stats, &pn_rd_stats);
        this_rd += AOMMIN(
            RDCOST(x->rdmult, x->rddiv, pn_rd_stats.rate, pn_rd_stats.dist),
            RDCOST(x->rdmult, x->rddiv, 0, pn_rd_stats.sse));
        block += step;
        ++block32;
      }
    }
  }

  this_rd = AOMMIN(RDCOST(x->rdmult, x->rddiv, rd_stats->rate, rd_stats->dist),
                   RDCOST(x->rdmult, x->rddiv, 0, rd_stats->sse));
  if (this_rd > ref_best_rd) is_cost_valid = 0;

  if (!is_cost_valid) {
    // reset cost value
    av1_invalid_rd_stats(rd_stats);
  }
}

static int64_t select_tx_size_fix_type(const AV1_COMP *cpi, MACROBLOCK *x,
                                       RD_STATS *rd_stats, BLOCK_SIZE bsize,
                                       int64_t ref_best_rd, TX_TYPE tx_type,
                                       RD_STATS *rd_stats_stack) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  const int is_inter = is_inter_block(mbmi);
  aom_prob skip_prob = av1_get_skip_prob(cm, xd);
  int s0 = av1_cost_bit(skip_prob, 0);
  int s1 = av1_cost_bit(skip_prob, 1);
  int64_t rd;
  int row, col;
  const int max_blocks_high = max_block_high(xd, bsize, 0);
  const int max_blocks_wide = max_block_wide(xd, bsize, 0);

  mbmi->tx_type = tx_type;
  mbmi->min_tx_size = TX_SIZES_ALL;
  inter_block_yrd(cpi, x, rd_stats, bsize, ref_best_rd, rd_stats_stack);

  if (rd_stats->rate == INT_MAX) return INT64_MAX;

  for (row = 0; row < max_blocks_high / 2; ++row)
    for (col = 0; col < max_blocks_wide / 2; ++col)
      mbmi->min_tx_size = AOMMIN(
          mbmi->min_tx_size, get_min_tx_size(mbmi->inter_tx_size[row][col]));

#if CONFIG_EXT_TX
  if (get_ext_tx_types(mbmi->min_tx_size, bsize, is_inter) > 1 &&
      !xd->lossless[xd->mi[0]->mbmi.segment_id]) {
    int ext_tx_set = get_ext_tx_set(mbmi->min_tx_size, bsize, is_inter);
    if (is_inter) {
      if (ext_tx_set > 0)
        rd_stats->rate +=
            cpi->inter_tx_type_costs[ext_tx_set]
                                    [txsize_sqr_map[mbmi->min_tx_size]]
                                    [mbmi->tx_type];
    } else {
      if (ext_tx_set > 0 && ALLOW_INTRA_EXT_TX)
        rd_stats->rate +=
            cpi->intra_tx_type_costs[ext_tx_set][mbmi->min_tx_size][mbmi->mode]
                                    [mbmi->tx_type];
    }
  }
#else   // CONFIG_EXT_TX
  if (mbmi->min_tx_size < TX_32X32 && !xd->lossless[xd->mi[0]->mbmi.segment_id])
    rd_stats->rate +=
        cpi->inter_tx_type_costs[mbmi->min_tx_size][mbmi->tx_type];
#endif  // CONFIG_EXT_TX

  if (rd_stats->skip)
    rd = RDCOST(x->rdmult, x->rddiv, s1, rd_stats->sse);
  else
    rd = RDCOST(x->rdmult, x->rddiv, rd_stats->rate + s0, rd_stats->dist);

  if (is_inter && !xd->lossless[xd->mi[0]->mbmi.segment_id] &&
      !(rd_stats->skip))
    rd = AOMMIN(rd, RDCOST(x->rdmult, x->rddiv, s1, rd_stats->sse));

  return rd;
}

static void select_tx_type_yrd(const AV1_COMP *cpi, MACROBLOCK *x,
                               RD_STATS *rd_stats, BLOCK_SIZE bsize,
                               int64_t ref_best_rd) {
  const TX_SIZE max_tx_size = max_txsize_lookup[bsize];
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  int64_t rd = INT64_MAX;
  int64_t best_rd = INT64_MAX;
  TX_TYPE tx_type, best_tx_type = DCT_DCT;
  const int is_inter = is_inter_block(mbmi);
  TX_SIZE best_tx_size[MAX_MIB_SIZE][MAX_MIB_SIZE];
  TX_SIZE best_tx = max_txsize_lookup[bsize];
  TX_SIZE best_min_tx_size = TX_SIZES_ALL;
  uint8_t best_blk_skip[MAX_MIB_SIZE * MAX_MIB_SIZE * 8];
  const int n4 = 1 << (num_pels_log2_lookup[bsize] - 2 * tx_size_wide_log2[0]);
  int idx, idy;
  int prune = 0;
  const int count32 = 1 << (2 * (cpi->common.mib_size_log2 -
                                 mi_width_log2_lookup[BLOCK_32X32]));
#if CONFIG_EXT_PARTITION
  RD_STATS rd_stats_stack[16];
#else
  RD_STATS rd_stats_stack[4];
#endif
#if CONFIG_EXT_TX
  int ext_tx_set = get_ext_tx_set(max_tx_size, bsize, is_inter);
#endif  // CONFIG_EXT_TX

  if (is_inter && cpi->sf.tx_type_search.prune_mode > NO_PRUNE)
#if CONFIG_EXT_TX
    prune = prune_tx_types(cpi, bsize, x, xd, ext_tx_set);
#else
    prune = prune_tx_types(cpi, bsize, x, xd, 0);
#endif

  av1_invalid_rd_stats(rd_stats);

  for (idx = 0; idx < count32; ++idx)
    av1_invalid_rd_stats(&rd_stats_stack[idx]);

  for (tx_type = DCT_DCT; tx_type < TX_TYPES; ++tx_type) {
    RD_STATS this_rd_stats;
    av1_init_rd_stats(&this_rd_stats);
#if CONFIG_EXT_TX
    if (is_inter) {
      if (!ext_tx_used_inter[ext_tx_set][tx_type]) continue;
      if (cpi->sf.tx_type_search.prune_mode > NO_PRUNE) {
        if (!do_tx_type_search(tx_type, prune)) continue;
      }
    } else {
      if (!ALLOW_INTRA_EXT_TX && bsize >= BLOCK_8X8) {
        if (tx_type != intra_mode_to_tx_type_context[mbmi->mode]) continue;
      }
      if (!ext_tx_used_intra[ext_tx_set][tx_type]) continue;
    }
#else   // CONFIG_EXT_TX
    if (is_inter && cpi->sf.tx_type_search.prune_mode > NO_PRUNE &&
        !do_tx_type_search(tx_type, prune))
      continue;
#endif  // CONFIG_EXT_TX
    if (is_inter && x->use_default_inter_tx_type &&
        tx_type != get_default_tx_type(0, xd, 0, max_tx_size))
      continue;

    if (xd->lossless[mbmi->segment_id])
      if (tx_type != DCT_DCT) continue;

    rd = select_tx_size_fix_type(cpi, x, &this_rd_stats, bsize, ref_best_rd,
                                 tx_type, rd_stats_stack);

    if (rd < best_rd) {
      best_rd = rd;
      *rd_stats = this_rd_stats;
      best_tx_type = mbmi->tx_type;
      best_tx = mbmi->tx_size;
      best_min_tx_size = mbmi->min_tx_size;
      memcpy(best_blk_skip, x->blk_skip[0], sizeof(best_blk_skip[0]) * n4);
      for (idy = 0; idy < xd->n8_h; ++idy)
        for (idx = 0; idx < xd->n8_w; ++idx)
          best_tx_size[idy][idx] = mbmi->inter_tx_size[idy][idx];
    }
  }

  mbmi->tx_type = best_tx_type;
  for (idy = 0; idy < xd->n8_h; ++idy)
    for (idx = 0; idx < xd->n8_w; ++idx)
      mbmi->inter_tx_size[idy][idx] = best_tx_size[idy][idx];
  mbmi->tx_size = best_tx;
  mbmi->min_tx_size = best_min_tx_size;
  memcpy(x->blk_skip[0], best_blk_skip, sizeof(best_blk_skip[0]) * n4);
}

static void tx_block_rd(const AV1_COMP *cpi, MACROBLOCK *x, int blk_row,
                        int blk_col, int plane, int block, TX_SIZE tx_size,
                        BLOCK_SIZE plane_bsize, ENTROPY_CONTEXT *above_ctx,
                        ENTROPY_CONTEXT *left_ctx, RD_STATS *rd_stats) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  struct macroblock_plane *const p = &x->plane[plane];
  struct macroblockd_plane *const pd = &xd->plane[plane];
  BLOCK_SIZE bsize = txsize_to_bsize[tx_size];
  const int tx_row = blk_row >> (1 - pd->subsampling_y);
  const int tx_col = blk_col >> (1 - pd->subsampling_x);
  TX_SIZE plane_tx_size;
  const int max_blocks_high = max_block_high(xd, plane_bsize, plane);
  const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane);

  assert(tx_size < TX_SIZES_ALL);

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

  plane_tx_size =
      plane ? uv_txsize_lookup[bsize][mbmi->inter_tx_size[tx_row][tx_col]][0][0]
            : mbmi->inter_tx_size[tx_row][tx_col];

  if (tx_size == plane_tx_size) {
    int coeff_ctx, i;
    ENTROPY_CONTEXT *ta = above_ctx + blk_col;
    ENTROPY_CONTEXT *tl = left_ctx + blk_row;
    coeff_ctx = get_entropy_context(tx_size, ta, tl);
    av1_tx_block_rd_b(cpi, x, tx_size, blk_row, blk_col, plane, block,
                      plane_bsize, coeff_ctx, rd_stats);

    for (i = 0; i < tx_size_wide_unit[tx_size]; ++i)
      ta[i] = !(p->eobs[block] == 0);
    for (i = 0; i < tx_size_high_unit[tx_size]; ++i)
      tl[i] = !(p->eobs[block] == 0);
  } else {
    const TX_SIZE sub_txs = sub_tx_size_map[tx_size];
    const int bsl = tx_size_wide_unit[sub_txs];
    int step = tx_size_wide_unit[sub_txs] * tx_size_high_unit[sub_txs];
    int i;

    assert(bsl > 0);

    for (i = 0; i < 4; ++i) {
      int offsetr = blk_row + (i >> 1) * bsl;
      int offsetc = blk_col + (i & 0x01) * bsl;

      if (offsetr >= max_blocks_high || offsetc >= max_blocks_wide) continue;

      tx_block_rd(cpi, x, offsetr, offsetc, plane, block, sub_txs, plane_bsize,
                  above_ctx, left_ctx, rd_stats);
      block += step;
    }
  }
}

// Return value 0: early termination triggered, no valid rd cost available;
//              1: rd cost values are valid.
static int inter_block_uvrd(const AV1_COMP *cpi, MACROBLOCK *x,
                            RD_STATS *rd_stats, BLOCK_SIZE bsize,
                            int64_t ref_best_rd) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  int plane;
  int is_cost_valid = 1;
  int64_t this_rd;

  if (ref_best_rd < 0) is_cost_valid = 0;

  av1_init_rd_stats(rd_stats);

#if CONFIG_EXT_TX && CONFIG_RECT_TX
  if (is_rect_tx(mbmi->tx_size)) {
    return super_block_uvrd(cpi, x, rd_stats, bsize, ref_best_rd);
  }
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX

  if (is_inter_block(mbmi) && is_cost_valid) {
    for (plane = 1; plane < MAX_MB_PLANE; ++plane)
      av1_subtract_plane(x, bsize, plane);
  }

  for (plane = 1; plane < MAX_MB_PLANE; ++plane) {
    const struct macroblockd_plane *const pd = &xd->plane[plane];
    const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
    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];
    const TX_SIZE max_tx_size = max_txsize_rect_lookup[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;
    int block = 0;
    const int step = bh * bw;
    ENTROPY_CONTEXT ta[2 * MAX_MIB_SIZE];
    ENTROPY_CONTEXT tl[2 * MAX_MIB_SIZE];
    RD_STATS pn_rd_stats;
    av1_init_rd_stats(&pn_rd_stats);

    av1_get_entropy_contexts(bsize, 0, pd, ta, tl);

    for (idy = 0; idy < mi_height; idy += bh) {
      for (idx = 0; idx < mi_width; idx += bw) {
        tx_block_rd(cpi, x, idy, idx, plane, block, max_tx_size, plane_bsize,
                    ta, tl, &pn_rd_stats);
        block += step;
      }
    }

    if (pn_rd_stats.rate == INT_MAX) {
      is_cost_valid = 0;
      break;
    }

    av1_merge_rd_stats(rd_stats, &pn_rd_stats);

    this_rd =
        AOMMIN(RDCOST(x->rdmult, x->rddiv, rd_stats->rate, rd_stats->dist),
               RDCOST(x->rdmult, x->rddiv, 0, rd_stats->sse));

    if (this_rd > ref_best_rd) {
      is_cost_valid = 0;
      break;
    }
  }

  if (!is_cost_valid) {
    // reset cost value
    av1_invalid_rd_stats(rd_stats);
  }

  return is_cost_valid;
}
#endif  // CONFIG_VAR_TX

#if CONFIG_PALETTE
static void rd_pick_palette_intra_sbuv(const AV1_COMP *const cpi, MACROBLOCK *x,
                                       int dc_mode_cost,
                                       uint8_t *best_palette_color_map,
                                       MB_MODE_INFO *const best_mbmi,
                                       int64_t *best_rd, int *rate,
                                       int *rate_tokenonly, int64_t *distortion,
                                       int *skippable) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info;
  const BLOCK_SIZE bsize = mbmi->sb_type;
  int this_rate;
  int64_t this_rd;
  int colors_u, colors_v, colors;
  const int src_stride = x->plane[1].src.stride;
  const uint8_t *const src_u = x->plane[1].src.buf;
  const uint8_t *const src_v = x->plane[2].src.buf;
  uint8_t *const color_map = xd->plane[1].color_index_map;
  RD_STATS tokenonly_rd_stats;
  int plane_block_width, plane_block_height, rows, cols;
  av1_get_block_dimensions(bsize, 1, xd, &plane_block_width,
                           &plane_block_height, &rows, &cols);
  if (rows * cols > PALETTE_MAX_BLOCK_SIZE) return;

  mbmi->uv_mode = DC_PRED;
#if CONFIG_FILTER_INTRA
  mbmi->filter_intra_mode_info.use_filter_intra_mode[1] = 0;
#endif  // CONFIG_FILTER_INTRA

#if CONFIG_AOM_HIGHBITDEPTH
  if (cpi->common.use_highbitdepth) {
    colors_u = av1_count_colors_highbd(src_u, src_stride, rows, cols,
                                       cpi->common.bit_depth);
    colors_v = av1_count_colors_highbd(src_v, src_stride, rows, cols,
                                       cpi->common.bit_depth);
  } else {
#endif  // CONFIG_AOM_HIGHBITDEPTH
    colors_u = av1_count_colors(src_u, src_stride, rows, cols);
    colors_v = av1_count_colors(src_v, src_stride, rows, cols);
#if CONFIG_AOM_HIGHBITDEPTH
  }
#endif  // CONFIG_AOM_HIGHBITDEPTH

  colors = colors_u > colors_v ? colors_u : colors_v;
  if (colors > 1 && colors <= 64) {
    int r, c, n, i, j;
    const int max_itr = 50;
    uint8_t color_order[PALETTE_MAX_SIZE];
    float lb_u, ub_u, val_u;
    float lb_v, ub_v, val_v;
    float *const data = x->palette_buffer->kmeans_data_buf;
    float centroids[2 * PALETTE_MAX_SIZE];

#if CONFIG_AOM_HIGHBITDEPTH
    uint16_t *src_u16 = CONVERT_TO_SHORTPTR(src_u);
    uint16_t *src_v16 = CONVERT_TO_SHORTPTR(src_v);
    if (cpi->common.use_highbitdepth) {
      lb_u = src_u16[0];
      ub_u = src_u16[0];
      lb_v = src_v16[0];
      ub_v = src_v16[0];
    } else {
#endif  // CONFIG_AOM_HIGHBITDEPTH
      lb_u = src_u[0];
      ub_u = src_u[0];
      lb_v = src_v[0];
      ub_v = src_v[0];
#if CONFIG_AOM_HIGHBITDEPTH
    }
#endif  // CONFIG_AOM_HIGHBITDEPTH

    for (r = 0; r < rows; ++r) {
      for (c = 0; c < cols; ++c) {
#if CONFIG_AOM_HIGHBITDEPTH
        if (cpi->common.use_highbitdepth) {
          val_u = src_u16[r * src_stride + c];
          val_v = src_v16[r * src_stride + c];
          data[(r * cols + c) * 2] = val_u;
          data[(r * cols + c) * 2 + 1] = val_v;
        } else {
#endif  // CONFIG_AOM_HIGHBITDEPTH
          val_u = src_u[r * src_stride + c];
          val_v = src_v[r * src_stride + c];
          data[(r * cols + c) * 2] = val_u;
          data[(r * cols + c) * 2 + 1] = val_v;
#if CONFIG_AOM_HIGHBITDEPTH
        }
#endif  // CONFIG_AOM_HIGHBITDEPTH
        if (val_u < lb_u)
          lb_u = val_u;
        else if (val_u > ub_u)
          ub_u = val_u;
        if (val_v < lb_v)
          lb_v = val_v;
        else if (val_v > ub_v)
          ub_v = val_v;
      }
    }

    for (n = colors > PALETTE_MAX_SIZE ? PALETTE_MAX_SIZE : colors; n >= 2;
         --n) {
      for (i = 0; i < n; ++i) {
        centroids[i * 2] = lb_u + (2 * i + 1) * (ub_u - lb_u) / n / 2;
        centroids[i * 2 + 1] = lb_v + (2 * i + 1) * (ub_v - lb_v) / n / 2;
      }
      av1_k_means(data, centroids, color_map, rows * cols, n, 2, max_itr);
      extend_palette_color_map(color_map, cols, rows, plane_block_width,
                               plane_block_height);
      pmi->palette_size[1] = n;
      for (i = 1; i < 3; ++i) {
        for (j = 0; j < n; ++j) {
#if CONFIG_AOM_HIGHBITDEPTH
          if (cpi->common.use_highbitdepth)
            pmi->palette_colors[i * PALETTE_MAX_SIZE + j] = clip_pixel_highbd(
                (int)centroids[j * 2 + i - 1], cpi->common.bit_depth);
          else
#endif  // CONFIG_AOM_HIGHBITDEPTH
            pmi->palette_colors[i * PALETTE_MAX_SIZE + j] =
                clip_pixel((int)centroids[j * 2 + i - 1]);
        }
      }

      super_block_uvrd(cpi, x, &tokenonly_rd_stats, bsize, *best_rd);
      if (tokenonly_rd_stats.rate == INT_MAX) continue;
      this_rate =
          tokenonly_rd_stats.rate + dc_mode_cost +
          2 * cpi->common.bit_depth * n * av1_cost_bit(128, 0) +
          cpi->palette_uv_size_cost[bsize - BLOCK_8X8][n - 2] +
          write_uniform_cost(n, color_map[0]) +
          av1_cost_bit(
              av1_default_palette_uv_mode_prob[pmi->palette_size[0] > 0], 1);

      for (i = 0; i < rows; ++i) {
        for (j = (i == 0 ? 1 : 0); j < cols; ++j) {
          int color_idx;
          const int color_ctx = av1_get_palette_color_index_context(
              color_map, plane_block_width, i, j, n, color_order, &color_idx);
          assert(color_idx >= 0 && color_idx < n);
          this_rate += cpi->palette_uv_color_cost[n - 2][color_ctx][color_idx];
        }
      }

      this_rd = RDCOST(x->rdmult, x->rddiv, this_rate, tokenonly_rd_stats.dist);
      if (this_rd < *best_rd) {
        *best_rd = this_rd;
        *best_mbmi = *mbmi;
        memcpy(best_palette_color_map, color_map,
               plane_block_width * plane_block_height *
                   sizeof(best_palette_color_map[0]));
        *rate = this_rate;
        *distortion = tokenonly_rd_stats.dist;
        *rate_tokenonly = tokenonly_rd_stats.rate;
        *skippable = tokenonly_rd_stats.skip;
      }
    }
  }
  if (best_mbmi->palette_mode_info.palette_size[1] > 0) {
    memcpy(color_map, best_palette_color_map,
           rows * cols * sizeof(best_palette_color_map[0]));
  }
}
#endif  // CONFIG_PALETTE

#if CONFIG_FILTER_INTRA
// Return 1 if an filter intra mode is selected; return 0 otherwise.
static int rd_pick_filter_intra_sbuv(const AV1_COMP *const cpi, MACROBLOCK *x,
                                     int *rate, int *rate_tokenonly,
                                     int64_t *distortion, int *skippable,
                                     BLOCK_SIZE bsize, int64_t *best_rd) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  int filter_intra_selected_flag = 0;
  int this_rate;
  int64_t this_rd;
  FILTER_INTRA_MODE mode;
  FILTER_INTRA_MODE_INFO filter_intra_mode_info;
  RD_STATS tokenonly_rd_stats;

  av1_zero(filter_intra_mode_info);
  mbmi->filter_intra_mode_info.use_filter_intra_mode[1] = 1;
  mbmi->uv_mode = DC_PRED;
#if CONFIG_PALETTE
  mbmi->palette_mode_info.palette_size[1] = 0;
#endif  // CONFIG_PALETTE

  for (mode = 0; mode < FILTER_INTRA_MODES; ++mode) {
    mbmi->filter_intra_mode_info.filter_intra_mode[1] = mode;
    if (!super_block_uvrd(cpi, x, &tokenonly_rd_stats, bsize, *best_rd))
      continue;

    this_rate = tokenonly_rd_stats.rate +
                av1_cost_bit(cpi->common.fc->filter_intra_probs[1], 1) +
                cpi->intra_uv_mode_cost[mbmi->mode][mbmi->uv_mode] +
                write_uniform_cost(FILTER_INTRA_MODES, mode);
    this_rd = RDCOST(x->rdmult, x->rddiv, this_rate, tokenonly_rd_stats.dist);
    if (this_rd < *best_rd) {
      *best_rd = this_rd;
      *rate = this_rate;
      *rate_tokenonly = tokenonly_rd_stats.rate;
      *distortion = tokenonly_rd_stats.dist;
      *skippable = tokenonly_rd_stats.skip;
      filter_intra_mode_info = mbmi->filter_intra_mode_info;
      filter_intra_selected_flag = 1;
    }
  }

  if (filter_intra_selected_flag) {
    mbmi->uv_mode = DC_PRED;
    mbmi->filter_intra_mode_info.use_filter_intra_mode[1] =
        filter_intra_mode_info.use_filter_intra_mode[1];
    mbmi->filter_intra_mode_info.filter_intra_mode[1] =
        filter_intra_mode_info.filter_intra_mode[1];
    return 1;
  } else {
    return 0;
  }
}
#endif  // CONFIG_FILTER_INTRA

#if CONFIG_EXT_INTRA
// Run RD calculation with given chroma intra prediction angle., and return
// the RD cost. Update the best mode info. if the RD cost is the best so far.
static int64_t pick_intra_angle_routine_sbuv(
    const AV1_COMP *const cpi, MACROBLOCK *x, BLOCK_SIZE bsize,
    int rate_overhead, int64_t best_rd_in, int *rate, RD_STATS *rd_stats,
    int *best_angle_delta, int64_t *best_rd) {
  MB_MODE_INFO *mbmi = &x->e_mbd.mi[0]->mbmi;
  int this_rate;
  int64_t this_rd;
  RD_STATS tokenonly_rd_stats;

  if (!super_block_uvrd(cpi, x, &tokenonly_rd_stats, bsize, best_rd_in))
    return INT64_MAX;
  this_rate = tokenonly_rd_stats.rate + rate_overhead;
  this_rd = RDCOST(x->rdmult, x->rddiv, this_rate, tokenonly_rd_stats.dist);
  if (this_rd < *best_rd) {
    *best_rd = this_rd;
    *best_angle_delta = mbmi->angle_delta[1];
    *rate = this_rate;
    rd_stats->rate = tokenonly_rd_stats.rate;
    rd_stats->dist = tokenonly_rd_stats.dist;
    rd_stats->skip = tokenonly_rd_stats.skip;
  }
  return this_rd;
}

// With given chroma directional intra prediction mode, pick the best angle
// delta. Return true if a RD cost that is smaller than the input one is found.
static int rd_pick_intra_angle_sbuv(const AV1_COMP *const cpi, MACROBLOCK *x,
                                    BLOCK_SIZE bsize, int rate_overhead,
                                    int64_t best_rd, int *rate,
                                    RD_STATS *rd_stats) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  int i, angle_delta, best_angle_delta = 0;
  int64_t this_rd, best_rd_in, rd_cost[2 * (MAX_ANGLE_DELTA_UV + 2)];

  rd_stats->rate = INT_MAX;
  rd_stats->skip = 0;
  rd_stats->dist = INT64_MAX;
  for (i = 0; i < 2 * (MAX_ANGLE_DELTA_UV + 2); ++i) rd_cost[i] = INT64_MAX;

  for (angle_delta = 0; angle_delta <= MAX_ANGLE_DELTA_UV; angle_delta += 2) {
    for (i = 0; i < 2; ++i) {
      best_rd_in = (best_rd == INT64_MAX)
                       ? INT64_MAX
                       : (best_rd + (best_rd >> ((angle_delta == 0) ? 3 : 5)));
      mbmi->angle_delta[1] = (1 - 2 * i) * angle_delta;
      this_rd = pick_intra_angle_routine_sbuv(cpi, x, bsize, rate_overhead,
                                              best_rd_in, rate, rd_stats,
                                              &best_angle_delta, &best_rd);
      rd_cost[2 * angle_delta + i] = this_rd;
      if (angle_delta == 0) {
        if (this_rd == INT64_MAX) return 0;
        rd_cost[1] = this_rd;
        break;
      }
    }
  }

  assert(best_rd != INT64_MAX);
  for (angle_delta = 1; angle_delta <= MAX_ANGLE_DELTA_UV; angle_delta += 2) {
    int64_t rd_thresh;
    for (i = 0; i < 2; ++i) {
      int skip_search = 0;
      rd_thresh = best_rd + (best_rd >> 5);
      if (rd_cost[2 * (angle_delta + 1) + i] > rd_thresh &&
          rd_cost[2 * (angle_delta - 1) + i] > rd_thresh)
        skip_search = 1;
      if (!skip_search) {
        mbmi->angle_delta[1] = (1 - 2 * i) * angle_delta;
        this_rd = pick_intra_angle_routine_sbuv(cpi, x, bsize, rate_overhead,
                                                best_rd, rate, rd_stats,
                                                &best_angle_delta, &best_rd);
      }
    }
  }

  mbmi->angle_delta[1] = best_angle_delta;
  return rd_stats->rate != INT_MAX;
}
#endif  // CONFIG_EXT_INTRA

static int64_t rd_pick_intra_sbuv_mode(const AV1_COMP *const cpi, MACROBLOCK *x,
                                       int *rate, int *rate_tokenonly,
                                       int64_t *distortion, int *skippable,
                                       BLOCK_SIZE bsize, TX_SIZE max_tx_size) {
  MACROBLOCKD *xd = &x->e_mbd;
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  MB_MODE_INFO best_mbmi = *mbmi;
  PREDICTION_MODE mode;
  int64_t best_rd = INT64_MAX, this_rd;
  int this_rate;
  RD_STATS tokenonly_rd_stats;
#if CONFIG_PVQ
  od_rollback_buffer buf;
  od_encode_checkpoint(&x->daala_enc, &buf);
#endif
#if CONFIG_PALETTE
  PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info;
  uint8_t *best_palette_color_map = NULL;
#endif  // CONFIG_PALETTE

#if CONFIG_FILTER_INTRA
  mbmi->filter_intra_mode_info.use_filter_intra_mode[1] = 0;
#endif  // CONFIG_FILTER_INTRA
#if CONFIG_PALETTE
  pmi->palette_size[1] = 0;
#endif  // CONFIG_PALETTE
  for (mode = DC_PRED; mode <= TM_PRED; ++mode) {
#if CONFIG_EXT_INTRA
    const int is_directional_mode =
        av1_is_directional_mode(mode, mbmi->sb_type);
#endif  // CONFIG_EXT_INTRA
    if (!(cpi->sf.intra_uv_mode_mask[txsize_sqr_up_map[max_tx_size]] &
          (1 << mode)))
      continue;

    mbmi->uv_mode = mode;
#if CONFIG_EXT_INTRA
    mbmi->angle_delta[1] = 0;
    if (is_directional_mode) {
      const int rate_overhead =
          cpi->intra_uv_mode_cost[mbmi->mode][mode] +
          write_uniform_cost(2 * MAX_ANGLE_DELTA_UV + 1, 0);
      if (!rd_pick_intra_angle_sbuv(cpi, x, bsize, rate_overhead, best_rd,
                                    &this_rate, &tokenonly_rd_stats))
        continue;
    } else {
#endif  // CONFIG_EXT_INTRA
      if (!super_block_uvrd(cpi, x, &tokenonly_rd_stats, bsize, best_rd)) {
#if CONFIG_PVQ
        od_encode_rollback(&x->daala_enc, &buf);
#endif
        continue;
      }
#if CONFIG_EXT_INTRA
    }
#endif  // CONFIG_EXT_INTRA
    this_rate =
        tokenonly_rd_stats.rate + cpi->intra_uv_mode_cost[mbmi->mode][mode];

#if CONFIG_EXT_INTRA
    if (is_directional_mode) {
      this_rate +=
          write_uniform_cost(2 * MAX_ANGLE_DELTA_UV + 1,
                             MAX_ANGLE_DELTA_UV + mbmi->angle_delta[1]);
    }
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
    if (mbmi->sb_type >= BLOCK_8X8 && mode == DC_PRED)
      this_rate += av1_cost_bit(cpi->common.fc->filter_intra_probs[1], 0);
#endif  // CONFIG_FILTER_INTRA
#if CONFIG_PALETTE
    if (cpi->common.allow_screen_content_tools && mbmi->sb_type >= BLOCK_8X8 &&
        mode == DC_PRED)
      this_rate += av1_cost_bit(
          av1_default_palette_uv_mode_prob[pmi->palette_size[0] > 0], 0);
#endif  // CONFIG_PALETTE

#if CONFIG_PVQ
    // For chroma channels, multiply lambda by 0.5 when doing intra prediction
    // NOTE: Chroma intra prediction itself has a separate RDO,
    // though final chroma intra mode's D and R is simply added to
    // those of luma then global RDO is performed to decide the modes of SB.
    // Also, for chroma, the RDO cannot decide tx_size (follow luma's decision)
    // or tx_type (DCT only), then only the intra prediction is
    // chroma's own mode decision based on separate RDO.
    // TODO(yushin) : Seek for more reasonable solution than this.
    this_rd = RDCOST(x->rdmult >> (1 * PVQ_CHROMA_RD), x->rddiv, this_rate,
                     tokenonly_rd_stats.dist);
    od_encode_rollback(&x->daala_enc, &buf);
#else
    this_rd = RDCOST(x->rdmult, x->rddiv, this_rate, tokenonly_rd_stats.dist);
#endif

    if (this_rd < best_rd) {
      best_mbmi = *mbmi;
      best_rd = this_rd;
      *rate = this_rate;
      *rate_tokenonly = tokenonly_rd_stats.rate;
      *distortion = tokenonly_rd_stats.dist;
      *skippable = tokenonly_rd_stats.skip;
    }
  }

#if CONFIG_PALETTE
  if (cpi->common.allow_screen_content_tools && mbmi->sb_type >= BLOCK_8X8) {
    best_palette_color_map = x->palette_buffer->best_palette_color_map;
    rd_pick_palette_intra_sbuv(cpi, x,
                               cpi->intra_uv_mode_cost[mbmi->mode][DC_PRED],
                               best_palette_color_map, &best_mbmi, &best_rd,
                               rate, rate_tokenonly, distortion, skippable);
  }
#endif  // CONFIG_PALETTE

#if CONFIG_FILTER_INTRA
  if (mbmi->sb_type >= BLOCK_8X8) {
    if (rd_pick_filter_intra_sbuv(cpi, x, rate, rate_tokenonly, distortion,
                                  skippable, bsize, &best_rd))
      best_mbmi = *mbmi;
  }
#endif  // CONFIG_FILTER_INTRA

  *mbmi = best_mbmi;
  // Make sure we actually chose a mode
  assert(best_rd < INT64_MAX);
  return best_rd;
}

static void choose_intra_uv_mode(const AV1_COMP *const cpi, MACROBLOCK *const x,
                                 PICK_MODE_CONTEXT *ctx, BLOCK_SIZE bsize,
                                 TX_SIZE max_tx_size, int *rate_uv,
                                 int *rate_uv_tokenonly, int64_t *dist_uv,
                                 int *skip_uv, PREDICTION_MODE *mode_uv) {
  // Use an estimated rd for uv_intra based on DC_PRED if the
  // appropriate speed flag is set.
  (void)ctx;
#if CONFIG_CB4X4
  rd_pick_intra_sbuv_mode(cpi, x, rate_uv, rate_uv_tokenonly, dist_uv, skip_uv,
                          bsize, max_tx_size);
#else
  rd_pick_intra_sbuv_mode(cpi, x, rate_uv, rate_uv_tokenonly, dist_uv, skip_uv,
                          bsize < BLOCK_8X8 ? BLOCK_8X8 : bsize, max_tx_size);
#endif
  *mode_uv = x->e_mbd.mi[0]->mbmi.uv_mode;
}

static int cost_mv_ref(const AV1_COMP *const cpi, PREDICTION_MODE mode,
#if CONFIG_REF_MV && CONFIG_EXT_INTER
                       int is_compound,
#endif  // CONFIG_REF_MV && CONFIG_EXT_INTER
                       int16_t mode_context) {
#if CONFIG_REF_MV
  int mode_cost = 0;
#if CONFIG_EXT_INTER
  int16_t mode_ctx =
      is_compound ? mode_context : (mode_context & NEWMV_CTX_MASK);
#else
  int16_t mode_ctx = mode_context & NEWMV_CTX_MASK;
#endif  // CONFIG_EXT_INTER
  int16_t is_all_zero_mv = mode_context & (1 << ALL_ZERO_FLAG_OFFSET);

  assert(is_inter_mode(mode));

#if CONFIG_EXT_INTER
  if (is_compound) {
    return cpi
        ->inter_compound_mode_cost[mode_context][INTER_COMPOUND_OFFSET(mode)];
  } else {
    if (mode == NEWMV || mode == NEWFROMNEARMV) {
#else
  if (mode == NEWMV) {
#endif  // CONFIG_EXT_INTER
      mode_cost = cpi->newmv_mode_cost[mode_ctx][0];
#if CONFIG_EXT_INTER
      if (!is_compound)
        mode_cost += cpi->new2mv_mode_cost[mode == NEWFROMNEARMV];
#endif  // CONFIG_EXT_INTER
      return mode_cost;
    } else {
      mode_cost = cpi->newmv_mode_cost[mode_ctx][1];
      mode_ctx = (mode_context >> ZEROMV_OFFSET) & ZEROMV_CTX_MASK;

      if (is_all_zero_mv) return mode_cost;

      if (mode == ZEROMV) {
        mode_cost += cpi->zeromv_mode_cost[mode_ctx][0];
        return mode_cost;
      } else {
        mode_cost += cpi->zeromv_mode_cost[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;

        mode_cost += cpi->refmv_mode_cost[mode_ctx][mode != NEARESTMV];
        return mode_cost;
      }
    }
#if CONFIG_EXT_INTER
  }
#endif  // CONFIG_EXT_INTER
#else
  assert(is_inter_mode(mode));
#if CONFIG_EXT_INTER
  if (is_inter_compound_mode(mode)) {
    return cpi
        ->inter_compound_mode_cost[mode_context][INTER_COMPOUND_OFFSET(mode)];
  } else {
#endif  // CONFIG_EXT_INTER
    return cpi->inter_mode_cost[mode_context][INTER_OFFSET(mode)];
#if CONFIG_EXT_INTER
  }
#endif  // CONFIG_EXT_INTER
#endif
}

#if CONFIG_EXT_INTER
static int get_interinter_compound_type_bits(BLOCK_SIZE bsize,
                                             COMPOUND_TYPE comp_type) {
  switch (comp_type) {
    case COMPOUND_AVERAGE: return 0;
    case COMPOUND_WEDGE: return get_interinter_wedge_bits(bsize);
#if CONFIG_COMPOUND_SEGMENT
    case COMPOUND_SEG: return 1;
#endif  // CONFIG_COMPOUND_SEGMENT
    default: assert(0); return 0;
  }
}
#endif  // CONFIG_EXT_INTER

#if CONFIG_GLOBAL_MOTION
static int GLOBAL_MOTION_RATE(const AV1_COMP *const cpi, int ref) {
  static const int gm_amortization_blks[TRANS_TYPES] = { 4, 6, 8, 10, 12 };
  static const int gm_params_cost[TRANS_TYPES] = {
    GM_IDENTITY_BITS, GM_TRANSLATION_BITS, GM_ROTZOOM_BITS,
    GM_AFFINE_BITS,   GM_HOMOGRAPHY_BITS,
  };
  const WarpedMotionParams *gm = &cpi->common.global_motion[(ref)];
  assert(gm->wmtype < GLOBAL_TRANS_TYPES);
  if (cpi->global_motion_used[ref][0] >= gm_amortization_blks[gm->wmtype]) {
    return 0;
  } else {
    const int cost = (gm_params_cost[gm->wmtype] << AV1_PROB_COST_SHIFT) +
                     cpi->gmtype_cost[gm->wmtype];
    return cost / gm_amortization_blks[gm->wmtype];
  }
}
#endif  // CONFIG_GLOBAL_MOTION

static int set_and_cost_bmi_mvs(
    const AV1_COMP *const cpi, MACROBLOCK *x, MACROBLOCKD *xd, int i,
    PREDICTION_MODE mode, int_mv this_mv[2],
    int_mv frame_mv[MB_MODE_COUNT][TOTAL_REFS_PER_FRAME],
    int_mv seg_mvs[TOTAL_REFS_PER_FRAME],
#if CONFIG_EXT_INTER
    int_mv compound_seg_newmvs[2],
#endif  // CONFIG_EXT_INTER
    int_mv *best_ref_mv[2], const int *mvjcost, int *mvcost[2]) {
  MODE_INFO *const mic = xd->mi[0];
  const MB_MODE_INFO *const mbmi = &mic->mbmi;
  const MB_MODE_INFO_EXT *const mbmi_ext = x->mbmi_ext;
  int thismvcost = 0;
  int idx, idy;
  const int num_4x4_blocks_wide = num_4x4_blocks_wide_lookup[mbmi->sb_type];
  const int num_4x4_blocks_high = num_4x4_blocks_high_lookup[mbmi->sb_type];
  const int is_compound = has_second_ref(mbmi);
  int mode_ctx;

  switch (mode) {
    case NEWMV:
#if CONFIG_EXT_INTER
    case NEWFROMNEARMV:
#endif  // CONFIG_EXT_INTER
      this_mv[0].as_int = seg_mvs[mbmi->ref_frame[0]].as_int;
#if CONFIG_EXT_INTER
      if (!cpi->common.allow_high_precision_mv)
        lower_mv_precision(&this_mv[0].as_mv, 0);
#endif  // CONFIG_EXT_INTER

#if CONFIG_REF_MV
      for (idx = 0; idx < 1 + is_compound; ++idx) {
        this_mv[idx] = seg_mvs[mbmi->ref_frame[idx]];
        av1_set_mvcost(x, mbmi->ref_frame[idx], idx, mbmi->ref_mv_idx);
        thismvcost +=
            av1_mv_bit_cost(&this_mv[idx].as_mv, &best_ref_mv[idx]->as_mv,
                            x->nmvjointcost, x->mvcost, MV_COST_WEIGHT_SUB);
      }
      (void)mvjcost;
      (void)mvcost;
#else
      thismvcost += av1_mv_bit_cost(&this_mv[0].as_mv, &best_ref_mv[0]->as_mv,
                                    mvjcost, mvcost, MV_COST_WEIGHT_SUB);
#if !CONFIG_EXT_INTER
      if (is_compound) {
        this_mv[1].as_int = seg_mvs[mbmi->ref_frame[1]].as_int;
        thismvcost += av1_mv_bit_cost(&this_mv[1].as_mv, &best_ref_mv[1]->as_mv,
                                      mvjcost, mvcost, MV_COST_WEIGHT_SUB);
      }
#endif  // !CONFIG_EXT_INTER
#endif
      break;
    case NEARMV:
    case NEARESTMV:
      this_mv[0].as_int = frame_mv[mode][mbmi->ref_frame[0]].as_int;
      if (is_compound)
        this_mv[1].as_int = frame_mv[mode][mbmi->ref_frame[1]].as_int;
      break;
    case ZEROMV: {
      int ref;
      for (ref = 0; ref < 1 + is_compound; ++ref) {
#if CONFIG_GLOBAL_MOTION
        this_mv[ref].as_int =
            gm_get_motion_vector(
                &cpi->common.global_motion[mbmi->ref_frame[ref]],
                cpi->common.allow_high_precision_mv)
                .as_int;
        thismvcost += GLOBAL_MOTION_RATE(cpi, mbmi->ref_frame[ref]);
#else
        this_mv[ref].as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
      }
      break;
    }
#if CONFIG_EXT_INTER
    case NEW_NEWMV:
      if (compound_seg_newmvs[0].as_int == INVALID_MV ||
          compound_seg_newmvs[1].as_int == INVALID_MV) {
        this_mv[0].as_int = seg_mvs[mbmi->ref_frame[0]].as_int;
        this_mv[1].as_int = seg_mvs[mbmi->ref_frame[1]].as_int;
      } else {
        this_mv[0].as_int = compound_seg_newmvs[0].as_int;
        this_mv[1].as_int = compound_seg_newmvs[1].as_int;
      }
      if (!cpi->common.allow_high_precision_mv)
        lower_mv_precision(&this_mv[0].as_mv, 0);
      if (!cpi->common.allow_high_precision_mv)
        lower_mv_precision(&this_mv[1].as_mv, 0);
      thismvcost += av1_mv_bit_cost(&this_mv[0].as_mv, &best_ref_mv[0]->as_mv,
                                    mvjcost, mvcost, MV_COST_WEIGHT_SUB);
      thismvcost += av1_mv_bit_cost(&this_mv[1].as_mv, &best_ref_mv[1]->as_mv,
                                    mvjcost, mvcost, MV_COST_WEIGHT_SUB);
      break;
    case NEW_NEARMV:
    case NEW_NEARESTMV:
      this_mv[0].as_int = seg_mvs[mbmi->ref_frame[0]].as_int;
      if (!cpi->common.allow_high_precision_mv)
        lower_mv_precision(&this_mv[0].as_mv, 0);
      thismvcost += av1_mv_bit_cost(&this_mv[0].as_mv, &best_ref_mv[0]->as_mv,
                                    mvjcost, mvcost, MV_COST_WEIGHT_SUB);
      this_mv[1].as_int = frame_mv[mode][mbmi->ref_frame[1]].as_int;
      break;
    case NEAR_NEWMV:
    case NEAREST_NEWMV:
      this_mv[0].as_int = frame_mv[mode][mbmi->ref_frame[0]].as_int;
      this_mv[1].as_int = seg_mvs[mbmi->ref_frame[1]].as_int;
      if (!cpi->common.allow_high_precision_mv)
        lower_mv_precision(&this_mv[1].as_mv, 0);
      thismvcost += av1_mv_bit_cost(&this_mv[1].as_mv, &best_ref_mv[1]->as_mv,
                                    mvjcost, mvcost, MV_COST_WEIGHT_SUB);
      break;
    case NEAREST_NEARMV:
    case NEAR_NEARESTMV:
    case NEAREST_NEARESTMV:
    case NEAR_NEARMV:
      this_mv[0].as_int = frame_mv[mode][mbmi->ref_frame[0]].as_int;
      this_mv[1].as_int = frame_mv[mode][mbmi->ref_frame[1]].as_int;
      break;
    case ZERO_ZEROMV:
#if CONFIG_GLOBAL_MOTION
      this_mv[0].as_int =
          gm_get_motion_vector(&cpi->common.global_motion[mbmi->ref_frame[0]],
                               cpi->common.allow_high_precision_mv)
              .as_int;
      this_mv[1].as_int =
          gm_get_motion_vector(&cpi->common.global_motion[mbmi->ref_frame[1]],
                               cpi->common.allow_high_precision_mv)
              .as_int;
      thismvcost += GLOBAL_MOTION_RATE(cpi, mbmi->ref_frame[0]) +
                    GLOBAL_MOTION_RATE(cpi, mbmi->ref_frame[1]);
#else
      this_mv[0].as_int = 0;
      this_mv[1].as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
      break;
#endif  // CONFIG_EXT_INTER
    default: break;
  }

  mic->bmi[i].as_mv[0].as_int = this_mv[0].as_int;
  if (is_compound) mic->bmi[i].as_mv[1].as_int = this_mv[1].as_int;

  mic->bmi[i].as_mode = mode;

#if CONFIG_REF_MV
  if (mode == NEWMV) {
    mic->bmi[i].pred_mv[0].as_int =
        mbmi_ext->ref_mvs[mbmi->ref_frame[0]][0].as_int;
    if (is_compound)
      mic->bmi[i].pred_mv[1].as_int =
          mbmi_ext->ref_mvs[mbmi->ref_frame[1]][0].as_int;
  } else {
    mic->bmi[i].pred_mv[0].as_int = this_mv[0].as_int;
    if (is_compound) mic->bmi[i].pred_mv[1].as_int = this_mv[1].as_int;
  }
#endif

  for (idy = 0; idy < num_4x4_blocks_high; ++idy)
    for (idx = 0; idx < num_4x4_blocks_wide; ++idx)
      memmove(&mic->bmi[i + idy * 2 + idx], &mic->bmi[i], sizeof(mic->bmi[i]));

#if CONFIG_REF_MV
#if CONFIG_EXT_INTER
  if (is_compound)
    mode_ctx = mbmi_ext->compound_mode_context[mbmi->ref_frame[0]];
  else
#endif  // CONFIG_EXT_INTER
    mode_ctx = av1_mode_context_analyzer(mbmi_ext->mode_context,
                                         mbmi->ref_frame, mbmi->sb_type, i);
#else  // CONFIG_REF_MV
  mode_ctx = mbmi_ext->mode_context[mbmi->ref_frame[0]];
#endif  // CONFIG_REF_MV
#if CONFIG_REF_MV && CONFIG_EXT_INTER
  return cost_mv_ref(cpi, mode, is_compound, mode_ctx) + thismvcost;
#else
  return cost_mv_ref(cpi, mode, mode_ctx) + thismvcost;
#endif  // CONFIG_REF_MV && CONFIG_EXT_INTER
}

static int64_t encode_inter_mb_segment_sub8x8(
    const AV1_COMP *const cpi, MACROBLOCK *x, int64_t best_yrd, int i,
    int *labelyrate, int64_t *distortion, int64_t *sse, ENTROPY_CONTEXT *ta,
    ENTROPY_CONTEXT *tl, int ir, int ic, int mi_row, int mi_col) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *xd = &x->e_mbd;
  struct macroblockd_plane *const pd = &xd->plane[0];
  struct macroblock_plane *const p = &x->plane[0];
  MODE_INFO *const mi = xd->mi[0];
  const BLOCK_SIZE plane_bsize = get_plane_block_size(mi->mbmi.sb_type, pd);
  const int txb_width = max_block_wide(xd, plane_bsize, 0);
  const int txb_height = max_block_high(xd, plane_bsize, 0);
  const int width = block_size_wide[plane_bsize];
  const int height = block_size_high[plane_bsize];
  int idx, idy;
  const uint8_t *const src =
      &p->src.buf[av1_raster_block_offset(BLOCK_8X8, i, p->src.stride)];
  uint8_t *const dst =
      &pd->dst.buf[av1_raster_block_offset(BLOCK_8X8, i, pd->dst.stride)];
  int64_t thisdistortion = 0, thissse = 0;
  int thisrate = 0;
  TX_SIZE tx_size = mi->mbmi.tx_size;
  TX_TYPE tx_type = get_tx_type(PLANE_TYPE_Y, xd, i, tx_size);
  const int num_4x4_w = tx_size_wide_unit[tx_size];
  const int num_4x4_h = tx_size_high_unit[tx_size];
#if !CONFIG_PVQ
  const SCAN_ORDER *scan_order = get_scan(cm, tx_size, tx_type, 1);
#else
  (void)cpi;
  (void)ta;
  (void)tl;
  (void)tx_type;
#endif

#if CONFIG_EXT_TX && CONFIG_RECT_TX
  assert(IMPLIES(xd->lossless[mi->mbmi.segment_id], tx_size == TX_4X4));
  assert(IMPLIES(!xd->lossless[mi->mbmi.segment_id],
                 tx_size == max_txsize_rect_lookup[mi->mbmi.sb_type]));
#else
  assert(tx_size == TX_4X4);
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX

  assert(tx_type == DCT_DCT);

  av1_build_inter_predictor_sub8x8(xd, 0, i, ir, ic, mi_row, mi_col);

#if CONFIG_AOM_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    aom_highbd_subtract_block(
        height, width, av1_raster_block_offset_int16(BLOCK_8X8, i, p->src_diff),
        8, src, p->src.stride, dst, pd->dst.stride, xd->bd);
  } else {
    aom_subtract_block(height, width,
                       av1_raster_block_offset_int16(BLOCK_8X8, i, p->src_diff),
                       8, src, p->src.stride, dst, pd->dst.stride);
  }
#else
  aom_subtract_block(height, width,
                     av1_raster_block_offset_int16(BLOCK_8X8, i, p->src_diff),
                     8, src, p->src.stride, dst, pd->dst.stride);
#endif  // CONFIG_AOM_HIGHBITDEPTH

  for (idy = 0; idy < txb_height; idy += num_4x4_h) {
    for (idx = 0; idx < txb_width; idx += num_4x4_w) {
      int64_t dist, ssz, rd, rd1, rd2;
      int coeff_ctx;
      const int k = i + (idy * 2 + idx);
      const int block = av1_raster_order_to_block_index(tx_size, k);
      assert(IMPLIES(tx_size == TX_4X8 || tx_size == TX_8X4,
                     idx == 0 && idy == 0));
      coeff_ctx = combine_entropy_contexts(*(ta + (k & 1)), *(tl + (k >> 1)));
#if !CONFIG_PVQ
#if CONFIG_NEW_QUANT
      av1_xform_quant(cm, x, 0, block, idy + (i >> 1), idx + (i & 0x01),
                      BLOCK_8X8, tx_size, coeff_ctx, AV1_XFORM_QUANT_FP_NUQ);
#else
      av1_xform_quant(cm, x, 0, block, idy + (i >> 1), idx + (i & 0x01),
                      BLOCK_8X8, tx_size, coeff_ctx, AV1_XFORM_QUANT_FP);
#endif  // CONFIG_NEW_QUANT
      if (xd->lossless[xd->mi[0]->mbmi.segment_id] == 0)
        av1_optimize_b(cm, x, 0, block, tx_size, coeff_ctx);
#else
      av1_xform_quant(cm, x, 0, block, idy + (i >> 1), idx + (i & 0x01),
                      BLOCK_8X8, tx_size, coeff_ctx, AV1_XFORM_QUANT_FP);
#endif
      dist_block(cpi, x, 0, block, idy + (i >> 1), idx + (i & 0x1), tx_size,
                 &dist, &ssz);
      thisdistortion += dist;
      thissse += ssz;
#if !CONFIG_PVQ
      thisrate +=
          av1_cost_coeffs(cm, x, 0, block, coeff_ctx, tx_size, scan_order->scan,
                          scan_order->neighbors, cpi->sf.use_fast_coef_costing);
      *(ta + (k & 1)) = !(p->eobs[block] == 0);
      *(tl + (k >> 1)) = !(p->eobs[block] == 0);
#else
      thisrate += x->rate;
      *(ta + (k & 1)) = !x->pvq_skip[0];
      *(tl + (k >> 1)) = !x->pvq_skip[0];
#endif
#if CONFIG_EXT_TX
      if (tx_size == TX_8X4) {
        *(ta + (k & 1) + 1) = *(ta + (k & 1));
      }
      if (tx_size == TX_4X8) {
        *(tl + (k >> 1) + 1) = *(tl + (k >> 1));
      }
#endif  // CONFIG_EXT_TX
      rd1 = RDCOST(x->rdmult, x->rddiv, thisrate, thisdistortion);
      rd2 = RDCOST(x->rdmult, x->rddiv, 0, thissse);
      rd = AOMMIN(rd1, rd2);
      if (rd >= best_yrd) return INT64_MAX;
    }
  }

  *distortion = thisdistortion;
  *labelyrate = thisrate;
  *sse = thissse;

  return RDCOST(x->rdmult, x->rddiv, *labelyrate, *distortion);
}

typedef struct {
  int eobs;
  int brate;
  int byrate;
  int64_t bdist;
  int64_t bsse;
  int64_t brdcost;
  int_mv mvs[2];
#if CONFIG_REF_MV
  int_mv pred_mv[2];
#endif
#if CONFIG_EXT_INTER
  int_mv ref_mv[2];
#endif  // CONFIG_EXT_INTER

#if CONFIG_CB4X4
  ENTROPY_CONTEXT ta[4];
  ENTROPY_CONTEXT tl[4];
#else
  ENTROPY_CONTEXT ta[2];
  ENTROPY_CONTEXT tl[2];
#endif
} SEG_RDSTAT;

typedef struct {
  int_mv *ref_mv[2];
  int_mv mvp;

  int64_t segment_rd;
  int r;
  int64_t d;
  int64_t sse;
  int segment_yrate;
  PREDICTION_MODE modes[4];
#if CONFIG_EXT_INTER
  SEG_RDSTAT rdstat[4][INTER_MODES + INTER_COMPOUND_MODES];
#else
  SEG_RDSTAT rdstat[4][INTER_MODES];
#endif  // CONFIG_EXT_INTER
  int mvthresh;
} BEST_SEG_INFO;

static INLINE int mv_check_bounds(const MACROBLOCK *x, const MV *mv) {
  return (mv->row >> 3) < x->mv_row_min || (mv->row >> 3) > x->mv_row_max ||
         (mv->col >> 3) < x->mv_col_min || (mv->col >> 3) > x->mv_col_max;
}

static INLINE void mi_buf_shift(MACROBLOCK *x, int i) {
  MB_MODE_INFO *const mbmi = &x->e_mbd.mi[0]->mbmi;
  struct macroblock_plane *const p = &x->plane[0];
  struct macroblockd_plane *const pd = &x->e_mbd.plane[0];

  p->src.buf =
      &p->src.buf[av1_raster_block_offset(BLOCK_8X8, i, p->src.stride)];
  assert(((intptr_t)pd->pre[0].buf & 0x7) == 0);
  pd->pre[0].buf =
      &pd->pre[0].buf[av1_raster_block_offset(BLOCK_8X8, i, pd->pre[0].stride)];
  if (has_second_ref(mbmi))
    pd->pre[1].buf =
        &pd->pre[1]
             .buf[av1_raster_block_offset(BLOCK_8X8, i, pd->pre[1].stride)];
}

static INLINE void mi_buf_restore(MACROBLOCK *x, struct buf_2d orig_src,
                                  struct buf_2d orig_pre[2]) {
  MB_MODE_INFO *mbmi = &x->e_mbd.mi[0]->mbmi;
  x->plane[0].src = orig_src;
  x->e_mbd.plane[0].pre[0] = orig_pre[0];
  if (has_second_ref(mbmi)) x->e_mbd.plane[0].pre[1] = orig_pre[1];
}

// Check if NEARESTMV/NEARMV/ZEROMV is the cheapest way encode zero motion.
// TODO(aconverse): Find out if this is still productive then clean up or remove
static int check_best_zero_mv(
    const AV1_COMP *const cpi, const int16_t mode_context[TOTAL_REFS_PER_FRAME],
#if CONFIG_REF_MV && CONFIG_EXT_INTER
    const int16_t compound_mode_context[TOTAL_REFS_PER_FRAME],
#endif  // CONFIG_REF_MV && CONFIG_EXT_INTER
    int_mv frame_mv[MB_MODE_COUNT][TOTAL_REFS_PER_FRAME], int this_mode,
    const MV_REFERENCE_FRAME ref_frames[2], const BLOCK_SIZE bsize, int block) {
  int_mv zeromv[2];
  int comp_pred_mode = ref_frames[1] > INTRA_FRAME;
  int cur_frm;
  for (cur_frm = 0; cur_frm < 1 + comp_pred_mode; cur_frm++) {
#if CONFIG_GLOBAL_MOTION
    if (this_mode == ZEROMV
#if CONFIG_EXT_INTER
        || this_mode == ZERO_ZEROMV
#endif  // CONFIG_EXT_INTER
        )
      zeromv[cur_frm].as_int =
          gm_get_motion_vector(&cpi->common.global_motion[ref_frames[cur_frm]],
                               cpi->common.allow_high_precision_mv)
              .as_int;
    else
#endif  // CONFIG_GLOBAL_MOTION
      zeromv[cur_frm].as_int = 0;
  }
#if !CONFIG_EXT_INTER
  assert(ref_frames[1] != INTRA_FRAME);  // Just sanity check
#endif
  if ((this_mode == NEARMV || this_mode == NEARESTMV || this_mode == ZEROMV) &&
      frame_mv[this_mode][ref_frames[0]].as_int == zeromv[0].as_int &&
      (ref_frames[1] <= INTRA_FRAME ||
       frame_mv[this_mode][ref_frames[1]].as_int == zeromv[1].as_int)) {
#if CONFIG_REF_MV
    int16_t rfc =
        av1_mode_context_analyzer(mode_context, ref_frames, bsize, block);
#else
    int16_t rfc = mode_context[ref_frames[0]];
#endif
#if CONFIG_REF_MV && CONFIG_EXT_INTER
    int c1 = cost_mv_ref(cpi, NEARMV, ref_frames[1] > INTRA_FRAME, rfc);
    int c2 = cost_mv_ref(cpi, NEARESTMV, ref_frames[1] > INTRA_FRAME, rfc);
    int c3 = cost_mv_ref(cpi, ZEROMV, ref_frames[1] > INTRA_FRAME, rfc);
#else
    int c1 = cost_mv_ref(cpi, NEARMV, rfc);
    int c2 = cost_mv_ref(cpi, NEARESTMV, rfc);
    int c3 = cost_mv_ref(cpi, ZEROMV, rfc);
#endif  // CONFIG_REF_MV && CONFIG_EXT_INTER

#if !CONFIG_REF_MV
    (void)bsize;
    (void)block;
#endif

    if (this_mode == NEARMV) {
      if (c1 > c3) return 0;
    } else if (this_mode == NEARESTMV) {
      if (c2 > c3) return 0;
    } else {
      assert(this_mode == ZEROMV);
      if (ref_frames[1] <= INTRA_FRAME) {
        if ((c3 >= c2 && frame_mv[NEARESTMV][ref_frames[0]].as_int == 0) ||
            (c3 >= c1 && frame_mv[NEARMV][ref_frames[0]].as_int == 0))
          return 0;
      } else {
        if ((c3 >= c2 && frame_mv[NEARESTMV][ref_frames[0]].as_int == 0 &&
             frame_mv[NEARESTMV][ref_frames[1]].as_int == 0) ||
            (c3 >= c1 && frame_mv[NEARMV][ref_frames[0]].as_int == 0 &&
             frame_mv[NEARMV][ref_frames[1]].as_int == 0))
          return 0;
      }
    }
  }
#if CONFIG_EXT_INTER
  else if ((this_mode == NEAREST_NEARESTMV || this_mode == NEAREST_NEARMV ||
            this_mode == NEAR_NEARESTMV || this_mode == NEAR_NEARMV ||
            this_mode == ZERO_ZEROMV) &&
           frame_mv[this_mode][ref_frames[0]].as_int == zeromv[0].as_int &&
           frame_mv[this_mode][ref_frames[1]].as_int == zeromv[1].as_int) {
#if CONFIG_REF_MV
    int16_t rfc = compound_mode_context[ref_frames[0]];
    int c1 = cost_mv_ref(cpi, NEAREST_NEARMV, 1, rfc);
    int c2 = cost_mv_ref(cpi, NEAREST_NEARESTMV, 1, rfc);
    int c3 = cost_mv_ref(cpi, ZERO_ZEROMV, 1, rfc);
    int c4 = cost_mv_ref(cpi, NEAR_NEARESTMV, 1, rfc);
    int c5 = cost_mv_ref(cpi, NEAR_NEARMV, 1, rfc);
#else
    int16_t rfc = mode_context[ref_frames[0]];
    int c1 = cost_mv_ref(cpi, NEAREST_NEARMV, rfc);
    int c2 = cost_mv_ref(cpi, NEAREST_NEARESTMV, rfc);
    int c3 = cost_mv_ref(cpi, ZERO_ZEROMV, rfc);
    int c4 = cost_mv_ref(cpi, NEAR_NEARESTMV, rfc);
    int c5 = cost_mv_ref(cpi, NEAR_NEARMV, rfc);
#endif

    if (this_mode == NEAREST_NEARMV) {
      if (c1 > c3) return 0;
    } else if (this_mode == NEAREST_NEARESTMV) {
      if (c2 > c3) return 0;
    } else if (this_mode == NEAR_NEARESTMV) {
      if (c4 > c3) return 0;
    } else if (this_mode == NEAR_NEARMV) {
      if (c5 > c3) return 0;
    } else {
      assert(this_mode == ZERO_ZEROMV);
      if ((c3 >= c2 && frame_mv[NEAREST_NEARESTMV][ref_frames[0]].as_int == 0 &&
           frame_mv[NEAREST_NEARESTMV][ref_frames[1]].as_int == 0) ||
          (c3 >= c1 && frame_mv[NEAREST_NEARMV][ref_frames[0]].as_int == 0 &&
           frame_mv[NEAREST_NEARMV][ref_frames[1]].as_int == 0) ||
          (c3 >= c5 && frame_mv[NEAR_NEARMV][ref_frames[0]].as_int == 0 &&
           frame_mv[NEAR_NEARMV][ref_frames[1]].as_int == 0) ||
          (c3 >= c4 && frame_mv[NEAR_NEARESTMV][ref_frames[0]].as_int == 0 &&
           frame_mv[NEAR_NEARESTMV][ref_frames[1]].as_int == 0))
        return 0;
    }
  }
#endif  // CONFIG_EXT_INTER
  return 1;
}

static void joint_motion_search(const AV1_COMP *cpi, MACROBLOCK *x,
                                BLOCK_SIZE bsize, int_mv *frame_mv, int mi_row,
                                int mi_col,
#if CONFIG_EXT_INTER
                                int_mv *ref_mv_sub8x8[2],
#endif
                                int_mv single_newmv[TOTAL_REFS_PER_FRAME],
                                int *rate_mv, const int block) {
  const AV1_COMMON *const cm = &cpi->common;
  const int pw = block_size_wide[bsize];
  const int ph = block_size_high[bsize];
  MACROBLOCKD *xd = &x->e_mbd;
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  const int refs[2] = { mbmi->ref_frame[0],
                        mbmi->ref_frame[1] < 0 ? 0 : mbmi->ref_frame[1] };
  int_mv ref_mv[2];
  int ite, ref;
#if CONFIG_DUAL_FILTER
  InterpFilter interp_filter[4] = {
    mbmi->interp_filter[0], mbmi->interp_filter[1], mbmi->interp_filter[2],
    mbmi->interp_filter[3],
  };
#else
  const InterpFilter interp_filter = mbmi->interp_filter;
#endif
  struct scale_factors sf;

  // Do joint motion search in compound mode to get more accurate mv.
  struct buf_2d backup_yv12[2][MAX_MB_PLANE];
  int last_besterr[2] = { INT_MAX, INT_MAX };
  const YV12_BUFFER_CONFIG *const scaled_ref_frame[2] = {
    av1_get_scaled_ref_frame(cpi, mbmi->ref_frame[0]),
    av1_get_scaled_ref_frame(cpi, mbmi->ref_frame[1])
  };

// Prediction buffer from second frame.
#if CONFIG_AOM_HIGHBITDEPTH
  DECLARE_ALIGNED(16, uint16_t, second_pred_alloc_16[MAX_SB_SQUARE]);
  uint8_t *second_pred;
#else
  DECLARE_ALIGNED(16, uint8_t, second_pred[MAX_SB_SQUARE]);
#endif  // CONFIG_AOM_HIGHBITDEPTH

#if CONFIG_EXT_INTER && CONFIG_CB4X4
  (void)ref_mv_sub8x8;
#endif

  for (ref = 0; ref < 2; ++ref) {
#if CONFIG_EXT_INTER && !CONFIG_CB4X4
    if (bsize < BLOCK_8X8 && ref_mv_sub8x8 != NULL)
      ref_mv[ref].as_int = ref_mv_sub8x8[ref]->as_int;
    else
#endif  // CONFIG_EXT_INTER
      ref_mv[ref] = x->mbmi_ext->ref_mvs[refs[ref]][0];

    if (scaled_ref_frame[ref]) {
      int i;
      // Swap out the reference frame for a version that's been scaled to
      // match the resolution of the current frame, allowing the existing
      // motion search code to be used without additional modifications.
      for (i = 0; i < MAX_MB_PLANE; i++)
        backup_yv12[ref][i] = xd->plane[i].pre[ref];
      av1_setup_pre_planes(xd, ref, scaled_ref_frame[ref], mi_row, mi_col,
                           NULL);
    }

    frame_mv[refs[ref]].as_int = single_newmv[refs[ref]].as_int;
  }

// Since we have scaled the reference frames to match the size of the current
// frame we must use a unit scaling factor during mode selection.
#if CONFIG_AOM_HIGHBITDEPTH
  av1_setup_scale_factors_for_frame(&sf, cm->width, cm->height, cm->width,
                                    cm->height, cm->use_highbitdepth);
#else
  av1_setup_scale_factors_for_frame(&sf, cm->width, cm->height, cm->width,
                                    cm->height);
#endif  // CONFIG_AOM_HIGHBITDEPTH

  // Allow joint search multiple times iteratively for each reference frame
  // and break out of the search loop if it couldn't find a better mv.
  for (ite = 0; ite < 4; ite++) {
    struct buf_2d ref_yv12[2];
    int bestsme = INT_MAX;
    int sadpb = x->sadperbit16;
    MV *const best_mv = &x->best_mv.as_mv;
    int search_range = 3;

    int tmp_col_min = x->mv_col_min;
    int tmp_col_max = x->mv_col_max;
    int tmp_row_min = x->mv_row_min;
    int tmp_row_max = x->mv_row_max;
    int id = ite % 2;  // Even iterations search in the first reference frame,
                       // odd iterations search in the second. The predictor
                       // found for the 'other' reference frame is factored in.
    const int plane = 0;
    ConvolveParams conv_params = get_conv_params(0, plane);

    // Initialized here because of compiler problem in Visual Studio.
    ref_yv12[0] = xd->plane[plane].pre[0];
    ref_yv12[1] = xd->plane[plane].pre[1];

#if CONFIG_DUAL_FILTER
    // reload the filter types
    interp_filter[0] =
        (id == 0) ? mbmi->interp_filter[2] : mbmi->interp_filter[0];
    interp_filter[1] =
        (id == 0) ? mbmi->interp_filter[3] : mbmi->interp_filter[1];
#endif

// Get the prediction block from the 'other' reference frame.
#if CONFIG_AOM_HIGHBITDEPTH
    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
      second_pred = CONVERT_TO_BYTEPTR(second_pred_alloc_16);
      av1_highbd_build_inter_predictor(
          ref_yv12[!id].buf, ref_yv12[!id].stride, second_pred, pw,
          &frame_mv[refs[!id]].as_mv, &sf, pw, ph, 0, interp_filter,
          MV_PRECISION_Q3, mi_col * MI_SIZE, mi_row * MI_SIZE, xd->bd);
    } else {
      second_pred = (uint8_t *)second_pred_alloc_16;
      av1_build_inter_predictor(
          ref_yv12[!id].buf, ref_yv12[!id].stride, second_pred, pw,
          &frame_mv[refs[!id]].as_mv, &sf, pw, ph, &conv_params, interp_filter,
          MV_PRECISION_Q3, mi_col * MI_SIZE, mi_row * MI_SIZE);
    }
#else
    av1_build_inter_predictor(
        ref_yv12[!id].buf, ref_yv12[!id].stride, second_pred, pw,
        &frame_mv[refs[!id]].as_mv, &sf, pw, ph, &conv_params, interp_filter,
        MV_PRECISION_Q3, mi_col * MI_SIZE, mi_row * MI_SIZE);
#endif  // CONFIG_AOM_HIGHBITDEPTH

    // Do compound motion search on the current reference frame.
    if (id) xd->plane[plane].pre[0] = ref_yv12[id];
    av1_set_mv_search_range(x, &ref_mv[id].as_mv);

    // Use the mv result from the single mode as mv predictor.
    *best_mv = frame_mv[refs[id]].as_mv;

    best_mv->col >>= 3;
    best_mv->row >>= 3;

#if CONFIG_REF_MV
    av1_set_mvcost(x, refs[id], id, mbmi->ref_mv_idx);
#endif

    // Small-range full-pixel motion search.
    bestsme =
        av1_refining_search_8p_c(x, sadpb, search_range, &cpi->fn_ptr[bsize],
                                 &ref_mv[id].as_mv, second_pred);
    if (bestsme < INT_MAX)
      bestsme = av1_get_mvpred_av_var(x, best_mv, &ref_mv[id].as_mv,
                                      second_pred, &cpi->fn_ptr[bsize], 1);

    x->mv_col_min = tmp_col_min;
    x->mv_col_max = tmp_col_max;
    x->mv_row_min = tmp_row_min;
    x->mv_row_max = tmp_row_max;

    if (bestsme < INT_MAX) {
      int dis; /* TODO: use dis in distortion calculation later. */
      unsigned int sse;
      if (cpi->sf.use_upsampled_references) {
        // Use up-sampled reference frames.
        struct macroblockd_plane *const pd = &xd->plane[plane];
        struct buf_2d backup_pred = pd->pre[0];
        const YV12_BUFFER_CONFIG *upsampled_ref =
            get_upsampled_ref(cpi, refs[id]);

        // Set pred for Y plane
        setup_pred_plane(&pd->pre[0], upsampled_ref->y_buffer,
                         upsampled_ref->y_crop_width,
                         upsampled_ref->y_crop_height, upsampled_ref->y_stride,
                         (mi_row << 3), (mi_col << 3), NULL, pd->subsampling_x,
                         pd->subsampling_y);

// If bsize < BLOCK_8X8, adjust pred pointer for this block
#if !CONFIG_CB4X4
        if (bsize < BLOCK_8X8)
          pd->pre[0].buf =
              &pd->pre[0].buf[(av1_raster_block_offset(BLOCK_8X8, block,
                                                       pd->pre[0].stride))
                              << 3];
#endif

        bestsme = cpi->find_fractional_mv_step(
            x, &ref_mv[id].as_mv, cpi->common.allow_high_precision_mv,
            x->errorperbit, &cpi->fn_ptr[bsize], 0,
            cpi->sf.mv.subpel_iters_per_step, NULL, x->nmvjointcost, x->mvcost,
            &dis, &sse, second_pred, pw, ph, 1);

        // Restore the reference frames.
        pd->pre[0] = backup_pred;
      } else {
        (void)block;
        bestsme = cpi->find_fractional_mv_step(
            x, &ref_mv[id].as_mv, cpi->common.allow_high_precision_mv,
            x->errorperbit, &cpi->fn_ptr[bsize], 0,
            cpi->sf.mv.subpel_iters_per_step, NULL, x->nmvjointcost, x->mvcost,
            &dis, &sse, second_pred, pw, ph, 0);
      }
    }

    // Restore the pointer to the first (possibly scaled) prediction buffer.
    if (id) xd->plane[plane].pre[0] = ref_yv12[0];

    if (bestsme < last_besterr[id]) {
      frame_mv[refs[id]].as_mv = *best_mv;
      last_besterr[id] = bestsme;
    } else {
      break;
    }
  }

  *rate_mv = 0;

  for (ref = 0; ref < 2; ++ref) {
    if (scaled_ref_frame[ref]) {
      // Restore the prediction frame pointers to their unscaled versions.
      int i;
      for (i = 0; i < MAX_MB_PLANE; i++)
        xd->plane[i].pre[ref] = backup_yv12[ref][i];
    }
#if CONFIG_REF_MV
    av1_set_mvcost(x, refs[ref], ref, mbmi->ref_mv_idx);
#endif
#if CONFIG_EXT_INTER && !CONFIG_CB4X4
    if (bsize >= BLOCK_8X8)
#endif  // CONFIG_EXT_INTER
      *rate_mv += av1_mv_bit_cost(&frame_mv[refs[ref]].as_mv,
                                  &x->mbmi_ext->ref_mvs[refs[ref]][0].as_mv,
                                  x->nmvjointcost, x->mvcost, MV_COST_WEIGHT);
#if CONFIG_EXT_INTER && !CONFIG_CB4X4
    else
      *rate_mv += av1_mv_bit_cost(&frame_mv[refs[ref]].as_mv,
                                  &ref_mv_sub8x8[ref]->as_mv, x->nmvjointcost,
                                  x->mvcost, MV_COST_WEIGHT);
#endif  // CONFIG_EXT_INTER
  }
}

static int64_t rd_pick_inter_best_sub8x8_mode(
    const AV1_COMP *const cpi, MACROBLOCK *x, int_mv *best_ref_mv,
    int_mv *second_best_ref_mv, int64_t best_rd, int *returntotrate,
    int *returnyrate, int64_t *returndistortion, int *skippable, int64_t *psse,
    int mvthresh,
#if CONFIG_EXT_INTER
    int_mv seg_mvs[4][2][TOTAL_REFS_PER_FRAME],
    int_mv compound_seg_newmvs[4][2],
#else
    int_mv seg_mvs[4][TOTAL_REFS_PER_FRAME],
#endif  // CONFIG_EXT_INTER
    BEST_SEG_INFO *bsi_buf, int filter_idx, int mi_row, int mi_col) {
  BEST_SEG_INFO *bsi = bsi_buf + filter_idx;
#if CONFIG_REF_MV
  int_mv tmp_ref_mv[2];
#endif
  MACROBLOCKD *xd = &x->e_mbd;
  MODE_INFO *mi = xd->mi[0];
  MB_MODE_INFO *mbmi = &mi->mbmi;
  int mode_idx;
  int k, br = 0, idx, idy;
  int64_t bd = 0, block_sse = 0;
  PREDICTION_MODE this_mode;
  const AV1_COMMON *cm = &cpi->common;
  struct macroblock_plane *const p = &x->plane[0];
  struct macroblockd_plane *const pd = &xd->plane[0];
  const int label_count = 4;
  int64_t this_segment_rd = 0;
  int label_mv_thresh;
  int segmentyrate = 0;
  const BLOCK_SIZE bsize = mbmi->sb_type;
  const int num_4x4_blocks_wide = num_4x4_blocks_wide_lookup[bsize];
  const int num_4x4_blocks_high = num_4x4_blocks_high_lookup[bsize];
#if CONFIG_CB4X4
  ENTROPY_CONTEXT t_above[4], t_left[4];
#else
  ENTROPY_CONTEXT t_above[2], t_left[2];
#endif
  int subpelmv = 1, have_ref = 0;
  const int has_second_rf = has_second_ref(mbmi);
  const int inter_mode_mask = cpi->sf.inter_mode_mask[bsize];
  MB_MODE_INFO_EXT *const mbmi_ext = x->mbmi_ext;
#if CONFIG_PVQ
  od_rollback_buffer pre_buf;

  od_encode_checkpoint(&x->daala_enc, &pre_buf);
#endif
#if CONFIG_EXT_TX && CONFIG_RECT_TX
  mbmi->tx_size =
      xd->lossless[mbmi->segment_id] ? TX_4X4 : max_txsize_rect_lookup[bsize];
#else
  mbmi->tx_size = TX_4X4;
#endif  // CONFIG_EXT_TX && CONFIG_RECT_TX

  av1_zero(*bsi);

  bsi->segment_rd = best_rd;
  bsi->ref_mv[0] = best_ref_mv;
  bsi->ref_mv[1] = second_best_ref_mv;
  bsi->mvp.as_int = best_ref_mv->as_int;
  bsi->mvthresh = mvthresh;

  for (idx = 0; idx < 4; ++idx) bsi->modes[idx] = ZEROMV;

#if CONFIG_REFMV
  for (idx = 0; idx < 4; ++idx) {
    for (k = NEARESTMV; k <= NEWMV; ++k) {
      bsi->rdstat[idx][INTER_OFFSET(k)].pred_mv[0].as_int = INVALID_MV;
      bsi->rdstat[idx][INTER_OFFSET(k)].pred_mv[1].as_int = INVALID_MV;

      bsi->rdstat[idx][INTER_OFFSET(k)].mvs[0].as_int = INVALID_MV;
      bsi->rdstat[idx][INTER_OFFSET(k)].mvs[1].as_int = INVALID_MV;
    }
  }
#endif

  memcpy(t_above, pd->above_context, sizeof(t_above));
  memcpy(t_left, pd->left_context, sizeof(t_left));

  // 64 makes this threshold really big effectively
  // making it so that we very rarely check mvs on
  // segments.   setting this to 1 would make mv thresh
  // roughly equal to what it is for macroblocks
  label_mv_thresh = 1 * bsi->mvthresh / label_count;

  // Segmentation method overheads
  for (idy = 0; idy < 2; idy += num_4x4_blocks_high) {
    for (idx = 0; idx < 2; idx += num_4x4_blocks_wide) {
      // TODO(jingning,rbultje): rewrite the rate-distortion optimization
      // loop for 4x4/4x8/8x4 block coding. to be replaced with new rd loop
      int_mv mode_mv[MB_MODE_COUNT][2];
      int_mv frame_mv[MB_MODE_COUNT][TOTAL_REFS_PER_FRAME];
      PREDICTION_MODE mode_selected = ZEROMV;
      int64_t new_best_rd = INT64_MAX;
      const int index = idy * 2 + idx;
      int ref;
#if CONFIG_REF_MV
      CANDIDATE_MV ref_mv_stack[2][MAX_REF_MV_STACK_SIZE];
      uint8_t ref_mv_count[2];
#endif
#if CONFIG_EXT_INTER
      int mv_idx;
      int_mv ref_mvs_sub8x8[2][2];
#endif  // CONFIG_EXT_INTER
#if CONFIG_PVQ
      od_rollback_buffer idx_buf, post_buf;
      od_encode_checkpoint(&x->daala_enc, &idx_buf);
      od_encode_checkpoint(&x->daala_enc, &post_buf);
#endif

      for (ref = 0; ref < 1 + has_second_rf; ++ref) {
        const MV_REFERENCE_FRAME frame = mbmi->ref_frame[ref];
#if CONFIG_EXT_INTER
        int_mv mv_ref_list[MAX_MV_REF_CANDIDATES];
        av1_update_mv_context(xd, mi, frame, mv_ref_list, index, mi_row, mi_col,
                              NULL);
#endif  // CONFIG_EXT_INTER
#if CONFIG_GLOBAL_MOTION
        frame_mv[ZEROMV][frame].as_int =
            gm_get_motion_vector(&cm->global_motion[frame],
                                 cm->allow_high_precision_mv)
                .as_int;
#else   // CONFIG_GLOBAL_MOTION
        frame_mv[ZEROMV][frame].as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
        av1_append_sub8x8_mvs_for_idx(cm, xd, index, ref, mi_row, mi_col,
#if CONFIG_REF_MV
                                      ref_mv_stack[ref], &ref_mv_count[ref],
#endif
#if CONFIG_EXT_INTER
                                      mv_ref_list,
#endif  // CONFIG_EXT_INTER
                                      &frame_mv[NEARESTMV][frame],
                                      &frame_mv[NEARMV][frame]);

#if CONFIG_REF_MV
        tmp_ref_mv[ref] = frame_mv[NEARESTMV][mbmi->ref_frame[ref]];
        lower_mv_precision(&tmp_ref_mv[ref].as_mv, cm->allow_high_precision_mv);
        bsi->ref_mv[ref] = &tmp_ref_mv[ref];
        mbmi_ext->ref_mvs[frame][0] = tmp_ref_mv[ref];
#endif

#if CONFIG_EXT_INTER
        mv_ref_list[0].as_int = frame_mv[NEARESTMV][frame].as_int;
        mv_ref_list[1].as_int = frame_mv[NEARMV][frame].as_int;
        av1_find_best_ref_mvs(cm->allow_high_precision_mv, mv_ref_list,
                              &ref_mvs_sub8x8[0][ref], &ref_mvs_sub8x8[1][ref]);

        if (has_second_rf) {
#if CONFIG_GLOBAL_MOTION
          frame_mv[ZERO_ZEROMV][frame].as_int =
              gm_get_motion_vector(&cm->global_motion[frame],
                                   cm->allow_high_precision_mv)
                  .as_int;
#else
          frame_mv[ZERO_ZEROMV][frame].as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
          frame_mv[NEAREST_NEARESTMV][frame].as_int =
              frame_mv[NEARESTMV][frame].as_int;

          if (ref == 0) {
            frame_mv[NEAREST_NEARMV][frame].as_int =
                frame_mv[NEARESTMV][frame].as_int;
            frame_mv[NEAR_NEARESTMV][frame].as_int =
                frame_mv[NEARMV][frame].as_int;
            frame_mv[NEAREST_NEWMV][frame].as_int =
                frame_mv[NEARESTMV][frame].as_int;
            frame_mv[NEAR_NEWMV][frame].as_int = frame_mv[NEARMV][frame].as_int;
            frame_mv[NEAR_NEARMV][frame].as_int =
                frame_mv[NEARMV][frame].as_int;
          } else if (ref == 1) {
            frame_mv[NEAREST_NEARMV][frame].as_int =
                frame_mv[NEARMV][frame].as_int;
            frame_mv[NEAR_NEARESTMV][frame].as_int =
                frame_mv[NEARESTMV][frame].as_int;
            frame_mv[NEW_NEARESTMV][frame].as_int =
                frame_mv[NEARESTMV][frame].as_int;
            frame_mv[NEW_NEARMV][frame].as_int = frame_mv[NEARMV][frame].as_int;
            frame_mv[NEAR_NEARMV][frame].as_int =
                frame_mv[NEARMV][frame].as_int;
          }
        }
#endif  // CONFIG_EXT_INTER
      }

// search for the best motion vector on this segment
#if CONFIG_EXT_INTER
      for (this_mode = (has_second_rf ? NEAREST_NEARESTMV : NEARESTMV);
           this_mode <= (has_second_rf ? NEW_NEWMV : NEWFROMNEARMV);
           ++this_mode)
#else
      for (this_mode = NEARESTMV; this_mode <= NEWMV; ++this_mode)
#endif  // CONFIG_EXT_INTER
      {
        const struct buf_2d orig_src = x->plane[0].src;
        struct buf_2d orig_pre[2];
        // This flag controls if the motion estimation will kick off. When it
        // is set to a non-zero value, the encoder will force motion estimation.
        int run_mv_search = 0;

        mode_idx = INTER_OFFSET(this_mode);
#if CONFIG_EXT_INTER
        mv_idx = (this_mode == NEWFROMNEARMV) ? 1 : 0;

        for (ref = 0; ref < 1 + has_second_rf; ++ref)
          bsi->ref_mv[ref]->as_int = ref_mvs_sub8x8[mv_idx][ref].as_int;
#endif  // CONFIG_EXT_INTER
        bsi->rdstat[index][mode_idx].brdcost = INT64_MAX;
        if (!(inter_mode_mask & (1 << this_mode))) continue;

#if CONFIG_REF_MV
        run_mv_search = 2;
#if !CONFIG_EXT_INTER
        if (filter_idx > 0 && this_mode == NEWMV) {
          BEST_SEG_INFO *ref_bsi = bsi_buf;
          SEG_RDSTAT *ref_rdstat = &ref_bsi->rdstat[index][mode_idx];

          if (has_second_rf) {
            if (seg_mvs[index][mbmi->ref_frame[0]].as_int ==
                    ref_rdstat->mvs[0].as_int &&
                ref_rdstat->mvs[0].as_int != INVALID_MV)
              if (bsi->ref_mv[0]->as_int == ref_rdstat->pred_mv[0].as_int)
                --run_mv_search;

            if (seg_mvs[index][mbmi->ref_frame[1]].as_int ==
                    ref_rdstat->mvs[1].as_int &&
                ref_rdstat->mvs[1].as_int != INVALID_MV)
              if (bsi->ref_mv[1]->as_int == ref_rdstat->pred_mv[1].as_int)
                --run_mv_search;
          } else {
            if (bsi->ref_mv[0]->as_int == ref_rdstat->pred_mv[0].as_int &&
                ref_rdstat->mvs[0].as_int != INVALID_MV) {
              run_mv_search = 0;
              seg_mvs[index][mbmi->ref_frame[0]].as_int =
                  ref_rdstat->mvs[0].as_int;
            }
          }

          if (run_mv_search != 0 && filter_idx > 1) {
            ref_bsi = bsi_buf + 1;
            ref_rdstat = &ref_bsi->rdstat[index][mode_idx];
            run_mv_search = 2;

            if (has_second_rf) {
              if (seg_mvs[index][mbmi->ref_frame[0]].as_int ==
                      ref_rdstat->mvs[0].as_int &&
                  ref_rdstat->mvs[0].as_int != INVALID_MV)
                if (bsi->ref_mv[0]->as_int == ref_rdstat->pred_mv[0].as_int)
                  --run_mv_search;

              if (seg_mvs[index][mbmi->ref_frame[1]].as_int ==
                      ref_rdstat->mvs[1].as_int &&
                  ref_rdstat->mvs[1].as_int != INVALID_MV)
                if (bsi->ref_mv[1]->as_int == ref_rdstat->pred_mv[1].as_int)
                  --run_mv_search;
            } else {
              if (bsi->ref_mv[0]->as_int == ref_rdstat->pred_mv[0].as_int &&
                  ref_rdstat->mvs[0].as_int != INVALID_MV) {
                run_mv_search = 0;
                seg_mvs[index][mbmi->ref_frame[0]].as_int =
                    ref_rdstat->mvs[0].as_int;
              }
            }
          }
        }
#endif  // CONFIG_EXT_INTER
#endif  // CONFIG_REF_MV

#if CONFIG_GLOBAL_MOTION
        if (cm->global_motion[mbmi->ref_frame[0]].wmtype == IDENTITY &&
            (!has_second_rf ||
             cm->global_motion[mbmi->ref_frame[1]].wmtype == IDENTITY))
#endif  // CONFIG_GLOBAL_MOTION

          if (!check_best_zero_mv(cpi, mbmi_ext->mode_context,
#if CONFIG_REF_MV && CONFIG_EXT_INTER
                                  mbmi_ext->compound_mode_context,
#endif  // CONFIG_REF_MV && CONFIG_EXT_INTER
                                  frame_mv, this_mode, mbmi->ref_frame, bsize,
                                  index))
            continue;

        memcpy(orig_pre, pd->pre, sizeof(orig_pre));
        memcpy(bsi->rdstat[index][mode_idx].ta, t_above,
               sizeof(bsi->rdstat[index][mode_idx].ta));
        memcpy(bsi->rdstat[index][mode_idx].tl, t_left,
               sizeof(bsi->rdstat[index][mode_idx].tl));
#if CONFIG_PVQ
        od_encode_rollback(&x->daala_enc, &idx_buf);
#endif

        // motion search for newmv (single predictor case only)
        if (!has_second_rf &&
#if CONFIG_EXT_INTER
            have_newmv_in_inter_mode(this_mode) &&
            (seg_mvs[index][mv_idx][mbmi->ref_frame[0]].as_int == INVALID_MV)
#else
            this_mode == NEWMV &&
            (seg_mvs[index][mbmi->ref_frame[0]].as_int == INVALID_MV ||
             run_mv_search)
#endif  // CONFIG_EXT_INTER
                ) {
          int step_param = 0;
          int bestsme = INT_MAX;
          int sadpb = x->sadperbit4;
          MV mvp_full;
          int max_mv;
          int cost_list[5];
          int tmp_col_min = x->mv_col_min;
          int tmp_col_max = x->mv_col_max;
          int tmp_row_min = x->mv_row_min;
          int tmp_row_max = x->mv_row_max;

          /* Is the best so far sufficiently good that we cant justify doing
           * and new motion search. */
          if (new_best_rd < label_mv_thresh) break;

          if (cpi->oxcf.mode != BEST) {
#if CONFIG_EXT_INTER
            bsi->mvp.as_int = bsi->ref_mv[0]->as_int;
#else
// use previous block's result as next block's MV predictor.
#if !CONFIG_REF_MV
            if (index > 0) {
              bsi->mvp.as_int = mi->bmi[index - 1].as_mv[0].as_int;
              if (index == 2)
                bsi->mvp.as_int = mi->bmi[index - 2].as_mv[0].as_int;
            }
#endif
#endif  // CONFIG_EXT_INTER
          }
          max_mv = (index == 0) ? (int)x->max_mv_context[mbmi->ref_frame[0]]
                                : AOMMAX(abs(bsi->mvp.as_mv.row),
                                         abs(bsi->mvp.as_mv.col)) >>
                                      3;

          if (cpi->sf.mv.auto_mv_step_size && cm->show_frame) {
            // Take wtd average of the step_params based on the last frame's
            // max mv magnitude and the best ref mvs of the current block for
            // the given reference.
            step_param =
                (av1_init_search_range(max_mv) + cpi->mv_step_param) / 2;
          } else {
            step_param = cpi->mv_step_param;
          }

#if CONFIG_REF_MV
          mvp_full.row = bsi->ref_mv[0]->as_mv.row >> 3;
          mvp_full.col = bsi->ref_mv[0]->as_mv.col >> 3;
#else
          mvp_full.row = bsi->mvp.as_mv.row >> 3;
          mvp_full.col = bsi->mvp.as_mv.col >> 3;
#endif

          if (cpi->sf.adaptive_motion_search) {
            mvp_full.row = x->pred_mv[mbmi->ref_frame[0]].row >> 3;
            mvp_full.col = x->pred_mv[mbmi->ref_frame[0]].col >> 3;
            step_param = AOMMAX(step_param, 8);
          }

          // adjust src pointer for this block
          mi_buf_shift(x, index);

          av1_set_mv_search_range(x, &bsi->ref_mv[0]->as_mv);

          x->best_mv.as_int = x->second_best_mv.as_int = INVALID_MV;

#if CONFIG_REF_MV
          av1_set_mvcost(x, mbmi->ref_frame[0], 0, mbmi->ref_mv_idx);
#endif
          bestsme = av1_full_pixel_search(
              cpi, x, bsize, &mvp_full, step_param, sadpb,
              cpi->sf.mv.subpel_search_method != SUBPEL_TREE ? cost_list : NULL,
              &bsi->ref_mv[0]->as_mv, INT_MAX, 1);

          x->mv_col_min = tmp_col_min;
          x->mv_col_max = tmp_col_max;
          x->mv_row_min = tmp_row_min;
          x->mv_row_max = tmp_row_max;

          if (bestsme < INT_MAX) {
            int distortion;
            if (cpi->sf.use_upsampled_references) {
              int best_mv_var;
              const int try_second =
                  x->second_best_mv.as_int != INVALID_MV &&
                  x->second_best_mv.as_int != x->best_mv.as_int;
              const int pw = block_size_wide[bsize];
              const int ph = block_size_high[bsize];
              // Use up-sampled reference frames.
              struct buf_2d backup_pred = pd->pre[0];
              const YV12_BUFFER_CONFIG *upsampled_ref =
                  get_upsampled_ref(cpi, mbmi->ref_frame[0]);

              // Set pred for Y plane
              setup_pred_plane(
                  &pd->pre[0], upsampled_ref->y_buffer,
                  upsampled_ref->y_crop_width, upsampled_ref->y_crop_height,
                  upsampled_ref->y_stride, (mi_row << 3), (mi_col << 3), NULL,
                  pd->subsampling_x, pd->subsampling_y);

              // adjust pred pointer for this block
              pd->pre[0].buf =
                  &pd->pre[0].buf[(av1_raster_block_offset(BLOCK_8X8, index,
                                                           pd->pre[0].stride))
                                  << 3];

              best_mv_var = cpi->find_fractional_mv_step(
                  x, &bsi->ref_mv[0]->as_mv, cm->allow_high_precision_mv,
                  x->errorperbit, &cpi->fn_ptr[bsize],
                  cpi->sf.mv.subpel_force_stop,
                  cpi->sf.mv.subpel_iters_per_step,
                  cond_cost_list(cpi, cost_list), x->nmvjointcost, x->mvcost,
                  &distortion, &x->pred_sse[mbmi->ref_frame[0]], NULL, pw, ph,
                  1);

              if (try_second) {
                int this_var;
                MV best_mv = x->best_mv.as_mv;
                const MV ref_mv = bsi->ref_mv[0]->as_mv;
                const int minc = AOMMAX(x->mv_col_min * 8, ref_mv.col - MV_MAX);
                const int maxc = AOMMIN(x->mv_col_max * 8, ref_mv.col + MV_MAX);
                const int minr = AOMMAX(x->mv_row_min * 8, ref_mv.row - MV_MAX);
                const int maxr = AOMMIN(x->mv_row_max * 8, ref_mv.row + MV_MAX);

                x->best_mv = x->second_best_mv;
                if (x->best_mv.as_mv.row * 8 <= maxr &&
                    x->best_mv.as_mv.row * 8 >= minr &&
                    x->best_mv.as_mv.col * 8 <= maxc &&
                    x->best_mv.as_mv.col * 8 >= minc) {
                  this_var = cpi->find_fractional_mv_step(
                      x, &bsi->ref_mv[0]->as_mv, cm->allow_high_precision_mv,
                      x->errorperbit, &cpi->fn_ptr[bsize],
                      cpi->sf.mv.subpel_force_stop,
                      cpi->sf.mv.subpel_iters_per_step,
                      cond_cost_list(cpi, cost_list), x->nmvjointcost,
                      x->mvcost, &distortion, &x->pred_sse[mbmi->ref_frame[0]],
                      NULL, pw, ph, 1);
                  if (this_var < best_mv_var) best_mv = x->best_mv.as_mv;
                  x->best_mv.as_mv = best_mv;
                }
              }

              // Restore the reference frames.
              pd->pre[0] = backup_pred;
            } else {
              cpi->find_fractional_mv_step(
                  x, &bsi->ref_mv[0]->as_mv, cm->allow_high_precision_mv,
                  x->errorperbit, &cpi->fn_ptr[bsize],
                  cpi->sf.mv.subpel_force_stop,
                  cpi->sf.mv.subpel_iters_per_step,
                  cond_cost_list(cpi, cost_list), x->nmvjointcost, x->mvcost,
                  &distortion, &x->pred_sse[mbmi->ref_frame[0]], NULL, 0, 0, 0);
            }

// save motion search result for use in compound prediction
#if CONFIG_EXT_INTER
            seg_mvs[index][mv_idx][mbmi->ref_frame[0]].as_mv = x->best_mv.as_mv;
#else
            seg_mvs[index][mbmi->ref_frame[0]].as_mv = x->best_mv.as_mv;
#endif  // CONFIG_EXT_INTER
          }

          if (cpi->sf.adaptive_motion_search)
            x->pred_mv[mbmi->ref_frame[0]] = x->best_mv.as_mv;

#if CONFIG_EXT_INTER
          mode_mv[this_mode][0] = x->best_mv;
#else
          mode_mv[NEWMV][0] = x->best_mv;
#endif  // CONFIG_EXT_INTER

          // restore src pointers
          mi_buf_restore(x, orig_src, orig_pre);
        }

        if (has_second_rf) {
#if CONFIG_EXT_INTER
          if (seg_mvs[index][mv_idx][mbmi->ref_frame[1]].as_int == INVALID_MV ||
              seg_mvs[index][mv_idx][mbmi->ref_frame[0]].as_int == INVALID_MV)
#else
          if (seg_mvs[index][mbmi->ref_frame[1]].as_int == INVALID_MV ||
              seg_mvs[index][mbmi->ref_frame[0]].as_int == INVALID_MV)
#endif  // CONFIG_EXT_INTER
            continue;
        }

#if CONFIG_DUAL_FILTER
        (void)run_mv_search;
#endif

        if (has_second_rf &&
#if CONFIG_EXT_INTER
            this_mode == NEW_NEWMV &&
#else
            this_mode == NEWMV &&
#endif  // CONFIG_EXT_INTER
#if CONFIG_DUAL_FILTER
            (mbmi->interp_filter[0] == EIGHTTAP_REGULAR || run_mv_search))
#else
            (mbmi->interp_filter == EIGHTTAP_REGULAR || run_mv_search))
#endif
        {
          // adjust src pointers
          mi_buf_shift(x, index);
          if (cpi->sf.comp_inter_joint_search_thresh <= bsize) {
            int rate_mv;
            joint_motion_search(cpi, x, bsize, frame_mv[this_mode], mi_row,
                                mi_col,
#if CONFIG_EXT_INTER
                                bsi->ref_mv, seg_mvs[index][mv_idx],
#else
                                seg_mvs[index],
#endif  // CONFIG_EXT_INTER
                                &rate_mv, index);
#if CONFIG_EXT_INTER
            compound_seg_newmvs[index][0].as_int =
                frame_mv[this_mode][mbmi->ref_frame[0]].as_int;
            compound_seg_newmvs[index][1].as_int =
                frame_mv[this_mode][mbmi->ref_frame[1]].as_int;
#else
            seg_mvs[index][mbmi->ref_frame[0]].as_int =
                frame_mv[this_mode][mbmi->ref_frame[0]].as_int;
            seg_mvs[index][mbmi->ref_frame[1]].as_int =
                frame_mv[this_mode][mbmi->ref_frame[1]].as_int;
#endif  // CONFIG_EXT_INTER
          }
          // restore src pointers
          mi_buf_restore(x, orig_src, orig_pre);
        }

        bsi->rdstat[index][mode_idx].brate = set_and_cost_bmi_mvs(
            cpi, x, xd, index, this_mode, mode_mv[this_mode], frame_mv,
#if CONFIG_EXT_INTER
            seg_mvs[index][mv_idx], compound_seg_newmvs[index],
#else
            seg_mvs[index],
#endif  // CONFIG_EXT_INTER
            bsi->ref_mv, x->nmvjointcost, x->mvcost);

        for (ref = 0; ref < 1 + has_second_rf; ++ref) {
          bsi->rdstat[index][mode_idx].mvs[ref].as_int =
              mode_mv[this_mode][ref].as_int;
          if (num_4x4_blocks_wide > 1)
            bsi->rdstat[index + 1][mode_idx].mvs[ref].as_int =
                mode_mv[this_mode][ref].as_int;
          if (num_4x4_blocks_high > 1)
            bsi->rdstat[index + 2][mode_idx].mvs[ref].as_int =
                mode_mv[this_mode][ref].as_int;
#if CONFIG_REF_MV
          bsi->rdstat[index][mode_idx].pred_mv[ref].as_int =
              mi->bmi[index].pred_mv[ref].as_int;
          if (num_4x4_blocks_wide > 1)
            bsi->rdstat[index + 1][mode_idx].pred_mv[ref].as_int =
                mi->bmi[index].pred_mv[ref].as_int;
          if (num_4x4_blocks_high > 1)
            bsi->rdstat[index + 2][mode_idx].pred_mv[ref].as_int =
                mi->bmi[index].pred_mv[ref].as_int;
#endif
#if CONFIG_EXT_INTER
          bsi->rdstat[index][mode_idx].ref_mv[ref].as_int =
              bsi->ref_mv[ref]->as_int;
          if (num_4x4_blocks_wide > 1)
            bsi->rdstat[index + 1][mode_idx].ref_mv[ref].as_int =
                bsi->ref_mv[ref]->as_int;
          if (num_4x4_blocks_high > 1)
            bsi->rdstat[index + 2][mode_idx].ref_mv[ref].as_int =
                bsi->ref_mv[ref]->as_int;
#endif  // CONFIG_EXT_INTER
        }

        // Trap vectors that reach beyond the UMV borders
        if (mv_check_bounds(x, &mode_mv[this_mode][0].as_mv) ||
            (has_second_rf && mv_check_bounds(x, &mode_mv[this_mode][1].as_mv)))
          continue;

        if (filter_idx > 0) {
          BEST_SEG_INFO *ref_bsi = bsi_buf;
          subpelmv = 0;
          have_ref = 1;

          for (ref = 0; ref < 1 + has_second_rf; ++ref) {
            subpelmv |= mv_has_subpel(&mode_mv[this_mode][ref].as_mv);
#if CONFIG_EXT_INTER
            if (have_newmv_in_inter_mode(this_mode))
              have_ref &=
                  ((mode_mv[this_mode][ref].as_int ==
                    ref_bsi->rdstat[index][mode_idx].mvs[ref].as_int) &&
                   (bsi->ref_mv[ref]->as_int ==
                    ref_bsi->rdstat[index][mode_idx].ref_mv[ref].as_int));
            else
#endif  // CONFIG_EXT_INTER
              have_ref &= mode_mv[this_mode][ref].as_int ==
                          ref_bsi->rdstat[index][mode_idx].mvs[ref].as_int;
          }

          have_ref &= ref_bsi->rdstat[index][mode_idx].brate > 0;

          if (filter_idx > 1 && !subpelmv && !have_ref) {
            ref_bsi = bsi_buf + 1;
            have_ref = 1;
            for (ref = 0; ref < 1 + has_second_rf; ++ref)
#if CONFIG_EXT_INTER
              if (have_newmv_in_inter_mode(this_mode))
                have_ref &=
                    ((mode_mv[this_mode][ref].as_int ==
                      ref_bsi->rdstat[index][mode_idx].mvs[ref].as_int) &&
                     (bsi->ref_mv[ref]->as_int ==
                      ref_bsi->rdstat[index][mode_idx].ref_mv[ref].as_int));
              else
#endif  // CONFIG_EXT_INTER
                have_ref &= mode_mv[this_mode][ref].as_int ==
                            ref_bsi->rdstat[index][mode_idx].mvs[ref].as_int;

            have_ref &= ref_bsi->rdstat[index][mode_idx].brate > 0;
          }

          if (!subpelmv && have_ref &&
              ref_bsi->rdstat[index][mode_idx].brdcost < INT64_MAX) {
#if CONFIG_REF_MV
            bsi->rdstat[index][mode_idx].byrate =
                ref_bsi->rdstat[index][mode_idx].byrate;
            bsi->rdstat[index][mode_idx].bdist =
                ref_bsi->rdstat[index][mode_idx].bdist;
            bsi->rdstat[index][mode_idx].bsse =
                ref_bsi->rdstat[index][mode_idx].bsse;
            bsi->rdstat[index][mode_idx].brate +=
                ref_bsi->rdstat[index][mode_idx].byrate;
            bsi->rdstat[index][mode_idx].eobs =
                ref_bsi->rdstat[index][mode_idx].eobs;

            bsi->rdstat[index][mode_idx].brdcost =
                RDCOST(x->rdmult, x->rddiv, bsi->rdstat[index][mode_idx].brate,
                       bsi->rdstat[index][mode_idx].bdist);

            memcpy(bsi->rdstat[index][mode_idx].ta,
                   ref_bsi->rdstat[index][mode_idx].ta,
                   sizeof(bsi->rdstat[index][mode_idx].ta));
            memcpy(bsi->rdstat[index][mode_idx].tl,
                   ref_bsi->rdstat[index][mode_idx].tl,
                   sizeof(bsi->rdstat[index][mode_idx].tl));
#else
            memcpy(&bsi->rdstat[index][mode_idx],
                   &ref_bsi->rdstat[index][mode_idx], sizeof(SEG_RDSTAT));
#endif
            if (num_4x4_blocks_wide > 1)
              bsi->rdstat[index + 1][mode_idx].eobs =
                  ref_bsi->rdstat[index + 1][mode_idx].eobs;
            if (num_4x4_blocks_high > 1)
              bsi->rdstat[index + 2][mode_idx].eobs =
                  ref_bsi->rdstat[index + 2][mode_idx].eobs;

            if (bsi->rdstat[index][mode_idx].brdcost < new_best_rd) {
#if CONFIG_REF_MV
              // If the NEWMV mode is using the same motion vector as the
              // NEARESTMV mode, skip the rest rate-distortion calculations
              // and use the inferred motion vector modes.
              if (this_mode == NEWMV) {
                if (has_second_rf) {
                  if (bsi->rdstat[index][mode_idx].mvs[0].as_int ==
                          bsi->ref_mv[0]->as_int &&
                      bsi->rdstat[index][mode_idx].mvs[1].as_int ==
                          bsi->ref_mv[1]->as_int)
                    continue;
                } else {
                  if (bsi->rdstat[index][mode_idx].mvs[0].as_int ==
                      bsi->ref_mv[0]->as_int)
                    continue;
                }
              }
#endif
              mode_selected = this_mode;
              new_best_rd = bsi->rdstat[index][mode_idx].brdcost;
#if CONFIG_PVQ
              od_encode_checkpoint(&x->daala_enc, &post_buf);
#endif
            }
            continue;
          }
        }

        bsi->rdstat[index][mode_idx].brdcost = encode_inter_mb_segment_sub8x8(
            cpi, x, bsi->segment_rd - this_segment_rd, index,
            &bsi->rdstat[index][mode_idx].byrate,
            &bsi->rdstat[index][mode_idx].bdist,
            &bsi->rdstat[index][mode_idx].bsse, bsi->rdstat[index][mode_idx].ta,
            bsi->rdstat[index][mode_idx].tl, idy, idx, mi_row, mi_col);

        if (bsi->rdstat[index][mode_idx].brdcost < INT64_MAX) {
          bsi->rdstat[index][mode_idx].brdcost += RDCOST(
              x->rdmult, x->rddiv, bsi->rdstat[index][mode_idx].brate, 0);
          bsi->rdstat[index][mode_idx].brate +=
              bsi->rdstat[index][mode_idx].byrate;
          bsi->rdstat[index][mode_idx].eobs = p->eobs[index];
          if (num_4x4_blocks_wide > 1)
            bsi->rdstat[index + 1][mode_idx].eobs = p->eobs[index + 1];
          if (num_4x4_blocks_high > 1)
            bsi->rdstat[index + 2][mode_idx].eobs = p->eobs[index + 2];
        }

        if (bsi->rdstat[index][mode_idx].brdcost < new_best_rd) {
#if CONFIG_REF_MV
          // If the NEWMV mode is using the same motion vector as the
          // NEARESTMV mode, skip the rest rate-distortion calculations
          // and use the inferred motion vector modes.
          if (this_mode == NEWMV) {
            if (has_second_rf) {
              if (bsi->rdstat[index][mode_idx].mvs[0].as_int ==
                      bsi->ref_mv[0]->as_int &&
                  bsi->rdstat[index][mode_idx].mvs[1].as_int ==
                      bsi->ref_mv[1]->as_int)
                continue;
            } else {
              if (bsi->rdstat[index][mode_idx].mvs[0].as_int ==
                  bsi->ref_mv[0]->as_int)
                continue;
            }
          }
#endif
          mode_selected = this_mode;
          new_best_rd = bsi->rdstat[index][mode_idx].brdcost;

#if CONFIG_PVQ
          od_encode_checkpoint(&x->daala_enc, &post_buf);
#endif
        }
      } /*for each 4x4 mode*/

      if (new_best_rd == INT64_MAX) {
        int iy, midx;
        for (iy = index + 1; iy < 4; ++iy)
#if CONFIG_EXT_INTER
          for (midx = 0; midx < INTER_MODES + INTER_COMPOUND_MODES; ++midx)
#else
          for (midx = 0; midx < INTER_MODES; ++midx)
#endif  // CONFIG_EXT_INTER
            bsi->rdstat[iy][midx].brdcost = INT64_MAX;
        bsi->segment_rd = INT64_MAX;
#if CONFIG_PVQ
        od_encode_rollback(&x->daala_enc, &pre_buf);
#endif
        return INT64_MAX;
      }

      mode_idx = INTER_OFFSET(mode_selected);
      memcpy(t_above, bsi->rdstat[index][mode_idx].ta, sizeof(t_above));
      memcpy(t_left, bsi->rdstat[index][mode_idx].tl, sizeof(t_left));
#if CONFIG_PVQ
      od_encode_rollback(&x->daala_enc, &post_buf);
#endif

#if CONFIG_EXT_INTER
      mv_idx = (mode_selected == NEWFROMNEARMV) ? 1 : 0;
      bsi->ref_mv[0]->as_int = bsi->rdstat[index][mode_idx].ref_mv[0].as_int;
      if (has_second_rf)
        bsi->ref_mv[1]->as_int = bsi->rdstat[index][mode_idx].ref_mv[1].as_int;
#endif  // CONFIG_EXT_INTER
      set_and_cost_bmi_mvs(cpi, x, xd, index, mode_selected,
                           mode_mv[mode_selected], frame_mv,
#if CONFIG_EXT_INTER
                           seg_mvs[index][mv_idx], compound_seg_newmvs[index],
#else
                           seg_mvs[index],
#endif  // CONFIG_EXT_INTER
                           bsi->ref_mv, x->nmvjointcost, x->mvcost);

      br += bsi->rdstat[index][mode_idx].brate;
      bd += bsi->rdstat[index][mode_idx].bdist;
      block_sse += bsi->rdstat[index][mode_idx].bsse;
      segmentyrate += bsi->rdstat[index][mode_idx].byrate;
      this_segment_rd += bsi->rdstat[index][mode_idx].brdcost;

      if (this_segment_rd > bsi->segment_rd) {
        int iy, midx;
        for (iy = index + 1; iy < 4; ++iy)
#if CONFIG_EXT_INTER
          for (midx = 0; midx < INTER_MODES + INTER_COMPOUND_MODES; ++midx)
#else
          for (midx = 0; midx < INTER_MODES; ++midx)
#endif  // CONFIG_EXT_INTER
            bsi->rdstat[iy][midx].brdcost = INT64_MAX;
        bsi->segment_rd = INT64_MAX;
#if CONFIG_PVQ
        od_encode_rollback(&x->daala_enc, &pre_buf);
#endif
        return INT64_MAX;
      }
    }
  } /* for each label */
#if CONFIG_PVQ
  od_encode_rollback(&x->daala_enc, &pre_buf);
#endif

  bsi->r = br;
  bsi->d = bd;
  bsi->segment_yrate = segmentyrate;
  bsi->segment_rd = this_segment_rd;
  bsi->sse = block_sse;

  // update the coding decisions
  for (k = 0; k < 4; ++k) bsi->modes[k] = mi->bmi[k].as_mode;

#if CONFIG_DAALA_DIST
  {
    const int src_stride = p->src.stride;
    const int dst_stride = pd->dst.stride;
    uint8_t *src = p->src.buf;
    uint8_t pred[8 * 8];
    const BLOCK_SIZE plane_bsize = get_plane_block_size(mi->mbmi.sb_type, pd);
    int use_activity_masking = 0;
    int qm = OD_HVS_QM;
#if CONFIG_PVQ
    use_activity_masking = x->daala_enc.use_activity_masking;
#endif

    for (idy = 0; idy < 2; idy += num_4x4_blocks_high)
      for (idx = 0; idx < 2; idx += num_4x4_blocks_wide) {
        int i = idy * 2 + idx;
        int j, m;
        uint8_t *dst_init = &pd->dst.buf[(idy * dst_stride + idx) * 4];

        av1_build_inter_predictor_sub8x8(xd, 0, i, idy, idx, mi_row, mi_col);
        // Save predicted pixels for use later.
        for (j = 0; j < num_4x4_blocks_high * 4; j++)
          for (m = 0; m < num_4x4_blocks_wide * 4; m++)
            pred[(idy * 4 + j) * 8 + idx * 4 + m] =
                dst_init[j * dst_stride + m];

        // Do xform and quant to get decoded pixels.
        {
          const int txb_width = max_block_wide(xd, plane_bsize, 0);
          const int txb_height = max_block_high(xd, plane_bsize, 0);
          int idx_, idy_;

          for (idy_ = 0; idy_ < txb_height; idy_++) {
            for (idx_ = 0; idx_ < txb_width; idx_++) {
              int block;
              int coeff_ctx = 0;
              const tran_low_t *dqcoeff;
              uint16_t eob;
              const PLANE_TYPE plane_type = PLANE_TYPE_Y;
              INV_TXFM_PARAM inv_txfm_param;
              uint8_t *dst = dst_init + (idy_ * dst_stride + idx_) * 4;

              block = i + (idy_ * 2 + idx_);

              dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
              eob = p->eobs[block];

              av1_xform_quant(cm, x, 0, block, idy + (i >> 1), idx + (i & 0x01),
                              BLOCK_8X8, TX_4X4, coeff_ctx, AV1_XFORM_QUANT_FP);

              inv_txfm_param.tx_type =
                  get_tx_type(plane_type, xd, block, TX_4X4);
              inv_txfm_param.tx_size = TX_4X4;
              inv_txfm_param.eob = eob;
              inv_txfm_param.lossless = xd->lossless[mbmi->segment_id];

#if CONFIG_PVQ
              {
                int i2, j2;

                for (j2 = 0; j2 < 4; j2++)
                  for (i2 = 0; i2 < 4; i2++) dst[j2 * dst_stride + i2] = 0;
              }
#endif
              inv_txfm_add(dqcoeff, dst, dst_stride, &inv_txfm_param);
            }
          }
        }
      }

    // Daala-defined distortion computed for 1) predicted pixels and
    // 2) decoded pixels of the block of 8x8 pixels
    bsi->sse = av1_daala_dist(src, src_stride, pred, 8, TX_8X8, qm,
                              use_activity_masking, x->qindex)
               << 4;

    bsi->d = av1_daala_dist(src, src_stride, pd->dst.buf, dst_stride, TX_8X8,
                            qm, use_activity_masking, x->qindex)
             << 4;
  }
#endif  // CONFIG_DAALA_DIST

  if (bsi->segment_rd > best_rd) return INT64_MAX;
  /* set it to the best */
  for (idx = 0; idx < 4; idx++) {
    mode_idx = INTER_OFFSET(bsi->modes[idx]);
    mi->bmi[idx].as_mv[0].as_int = bsi->rdstat[idx][mode_idx].mvs[0].as_int;
    if (has_second_ref(mbmi))
      mi->bmi[idx].as_mv[1].as_int = bsi->rdstat[idx][mode_idx].mvs[1].as_int;
#if CONFIG_REF_MV
    mi->bmi[idx].pred_mv[0] = bsi->rdstat[idx][mode_idx].pred_mv[0];
    if (has_second_ref(mbmi))
      mi->bmi[idx].pred_mv[1] = bsi->rdstat[idx][mode_idx].pred_mv[1];
#endif
#if CONFIG_EXT_INTER
    mi->bmi[idx].ref_mv[0].as_int = bsi->rdstat[idx][mode_idx].ref_mv[0].as_int;
    if (has_second_rf)
      mi->bmi[idx].ref_mv[1].as_int =
          bsi->rdstat[idx][mode_idx].ref_mv[1].as_int;
#endif  // CONFIG_EXT_INTER
    x->plane[0].eobs[idx] = bsi->rdstat[idx][mode_idx].eobs;
    mi->bmi[idx].as_mode = bsi->modes[idx];
  }

  /*
   * used to set mbmi->mv.as_int
   */
  *returntotrate = bsi->r;
  *returndistortion = bsi->d;
  *returnyrate = bsi->segment_yrate;
  *skippable = av1_is_skippable_in_plane(x, BLOCK_8X8, 0);
  *psse = bsi->sse;
  mbmi->mode = bsi->modes[3];

  return bsi->segment_rd;
}

static void estimate_ref_frame_costs(const AV1_COMMON *cm,
                                     const MACROBLOCKD *xd, int segment_id,
                                     unsigned int *ref_costs_single,
                                     unsigned int *ref_costs_comp,
                                     aom_prob *comp_mode_p) {
  int seg_ref_active =
      segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME);
  if (seg_ref_active) {
    memset(ref_costs_single, 0,
           TOTAL_REFS_PER_FRAME * sizeof(*ref_costs_single));
    memset(ref_costs_comp, 0, TOTAL_REFS_PER_FRAME * sizeof(*ref_costs_comp));
    *comp_mode_p = 128;
  } else {
    aom_prob intra_inter_p = av1_get_intra_inter_prob(cm, xd);
    aom_prob comp_inter_p = 128;

    if (cm->reference_mode == REFERENCE_MODE_SELECT) {
      comp_inter_p = av1_get_reference_mode_prob(cm, xd);
      *comp_mode_p = comp_inter_p;
    } else {
      *comp_mode_p = 128;
    }

    ref_costs_single[INTRA_FRAME] = av1_cost_bit(intra_inter_p, 0);

    if (cm->reference_mode != COMPOUND_REFERENCE) {
      aom_prob ref_single_p1 = av1_get_pred_prob_single_ref_p1(cm, xd);
      aom_prob ref_single_p2 = av1_get_pred_prob_single_ref_p2(cm, xd);
#if CONFIG_EXT_REFS
      aom_prob ref_single_p3 = av1_get_pred_prob_single_ref_p3(cm, xd);
      aom_prob ref_single_p4 = av1_get_pred_prob_single_ref_p4(cm, xd);
      aom_prob ref_single_p5 = av1_get_pred_prob_single_ref_p5(cm, xd);
#endif  // CONFIG_EXT_REFS

      unsigned int base_cost = av1_cost_bit(intra_inter_p, 1);

      ref_costs_single[LAST_FRAME] =
#if CONFIG_EXT_REFS
          ref_costs_single[LAST2_FRAME] = ref_costs_single[LAST3_FRAME] =
              ref_costs_single[BWDREF_FRAME] =
#endif  // CONFIG_EXT_REFS
                  ref_costs_single[GOLDEN_FRAME] =
                      ref_costs_single[ALTREF_FRAME] = base_cost;

#if CONFIG_EXT_REFS
      ref_costs_single[LAST_FRAME] += av1_cost_bit(ref_single_p1, 0);
      ref_costs_single[LAST2_FRAME] += av1_cost_bit(ref_single_p1, 0);
      ref_costs_single[LAST3_FRAME] += av1_cost_bit(ref_single_p1, 0);
      ref_costs_single[GOLDEN_FRAME] += av1_cost_bit(ref_single_p1, 0);
      ref_costs_single[BWDREF_FRAME] += av1_cost_bit(ref_single_p1, 1);
      ref_costs_single[ALTREF_FRAME] += av1_cost_bit(ref_single_p1, 1);

      ref_costs_single[LAST_FRAME] += av1_cost_bit(ref_single_p3, 0);
      ref_costs_single[LAST2_FRAME] += av1_cost_bit(ref_single_p3, 0);
      ref_costs_single[LAST3_FRAME] += av1_cost_bit(ref_single_p3, 1);
      ref_costs_single[GOLDEN_FRAME] += av1_cost_bit(ref_single_p3, 1);

      ref_costs_single[BWDREF_FRAME] += av1_cost_bit(ref_single_p2, 0);
      ref_costs_single[ALTREF_FRAME] += av1_cost_bit(ref_single_p2, 1);

      ref_costs_single[LAST_FRAME] += av1_cost_bit(ref_single_p4, 0);
      ref_costs_single[LAST2_FRAME] += av1_cost_bit(ref_single_p4, 1);

      ref_costs_single[LAST3_FRAME] += av1_cost_bit(ref_single_p5, 0);
      ref_costs_single[GOLDEN_FRAME] += av1_cost_bit(ref_single_p5, 1);
#else
      ref_costs_single[LAST_FRAME] += av1_cost_bit(ref_single_p1, 0);
      ref_costs_single[GOLDEN_FRAME] += av1_cost_bit(ref_single_p1, 1);
      ref_costs_single[ALTREF_FRAME] += av1_cost_bit(ref_single_p1, 1);

      ref_costs_single[GOLDEN_FRAME] += av1_cost_bit(ref_single_p2, 0);
      ref_costs_single[ALTREF_FRAME] += av1_cost_bit(ref_single_p2, 1);
#endif  // CONFIG_EXT_REFS
    } else {
      ref_costs_single[LAST_FRAME] = 512;
#if CONFIG_EXT_REFS
      ref_costs_single[LAST2_FRAME] = 512;
      ref_costs_single[LAST3_FRAME] = 512;
      ref_costs_single[BWDREF_FRAME] = 512;
#endif  // CONFIG_EXT_REFS
      ref_costs_single[GOLDEN_FRAME] = 512;
      ref_costs_single[ALTREF_FRAME] = 512;
    }

    if (cm->reference_mode != SINGLE_REFERENCE) {
      aom_prob ref_comp_p = av1_get_pred_prob_comp_ref_p(cm, xd);
#if CONFIG_EXT_REFS
      aom_prob ref_comp_p1 = av1_get_pred_prob_comp_ref_p1(cm, xd);
      aom_prob ref_comp_p2 = av1_get_pred_prob_comp_ref_p2(cm, xd);
      aom_prob bwdref_comp_p = av1_get_pred_prob_comp_bwdref_p(cm, xd);
#endif  // CONFIG_EXT_REFS

      unsigned int base_cost = av1_cost_bit(intra_inter_p, 1);

      ref_costs_comp[LAST_FRAME] =
#if CONFIG_EXT_REFS
          ref_costs_comp[LAST2_FRAME] = ref_costs_comp[LAST3_FRAME] =
#endif  // CONFIG_EXT_REFS
              ref_costs_comp[GOLDEN_FRAME] = base_cost;

#if CONFIG_EXT_REFS
      ref_costs_comp[BWDREF_FRAME] = ref_costs_comp[ALTREF_FRAME] = 0;
#endif  // CONFIG_EXT_REFS

#if CONFIG_EXT_REFS
      ref_costs_comp[LAST_FRAME] += av1_cost_bit(ref_comp_p, 0);
      ref_costs_comp[LAST2_FRAME] += av1_cost_bit(ref_comp_p, 0);
      ref_costs_comp[LAST3_FRAME] += av1_cost_bit(ref_comp_p, 1);
      ref_costs_comp[GOLDEN_FRAME] += av1_cost_bit(ref_comp_p, 1);

      ref_costs_comp[LAST_FRAME] += av1_cost_bit(ref_comp_p1, 1);
      ref_costs_comp[LAST2_FRAME] += av1_cost_bit(ref_comp_p1, 0);

      ref_costs_comp[LAST3_FRAME] += av1_cost_bit(ref_comp_p2, 0);
      ref_costs_comp[GOLDEN_FRAME] += av1_cost_bit(ref_comp_p2, 1);

      // NOTE(zoeliu): BWDREF and ALTREF each add an extra cost by coding 1
      //               more bit.
      ref_costs_comp[BWDREF_FRAME] += av1_cost_bit(bwdref_comp_p, 0);
      ref_costs_comp[ALTREF_FRAME] += av1_cost_bit(bwdref_comp_p, 1);
#else
      ref_costs_comp[LAST_FRAME] += av1_cost_bit(ref_comp_p, 0);
      ref_costs_comp[GOLDEN_FRAME] += av1_cost_bit(ref_comp_p, 1);
#endif  // CONFIG_EXT_REFS
    } else {
      ref_costs_comp[LAST_FRAME] = 512;
#if CONFIG_EXT_REFS
      ref_costs_comp[LAST2_FRAME] = 512;
      ref_costs_comp[LAST3_FRAME] = 512;
      ref_costs_comp[BWDREF_FRAME] = 512;
      ref_costs_comp[ALTREF_FRAME] = 512;
#endif  // CONFIG_EXT_REFS
      ref_costs_comp[GOLDEN_FRAME] = 512;
    }
  }
}

static void store_coding_context(MACROBLOCK *x, PICK_MODE_CONTEXT *ctx,
                                 int mode_index,
                                 int64_t comp_pred_diff[REFERENCE_MODES],
                                 int skippable) {
  MACROBLOCKD *const xd = &x->e_mbd;

  // Take a snapshot of the coding context so it can be
  // restored if we decide to encode this way
  ctx->skip = x->skip;
  ctx->skippable = skippable;
  ctx->best_mode_index = mode_index;
  ctx->mic = *xd->mi[0];
  ctx->mbmi_ext = *x->mbmi_ext;
  ctx->single_pred_diff = (int)comp_pred_diff[SINGLE_REFERENCE];
  ctx->comp_pred_diff = (int)comp_pred_diff[COMPOUND_REFERENCE];
  ctx->hybrid_pred_diff = (int)comp_pred_diff[REFERENCE_MODE_SELECT];
}

static void setup_buffer_inter(
    const AV1_COMP *const cpi, MACROBLOCK *x, MV_REFERENCE_FRAME ref_frame,
    BLOCK_SIZE block_size, int mi_row, int mi_col,
    int_mv frame_nearest_mv[TOTAL_REFS_PER_FRAME],
    int_mv frame_near_mv[TOTAL_REFS_PER_FRAME],
    struct buf_2d yv12_mb[TOTAL_REFS_PER_FRAME][MAX_MB_PLANE]) {
  const AV1_COMMON *cm = &cpi->common;
  const YV12_BUFFER_CONFIG *yv12 = get_ref_frame_buffer(cpi, ref_frame);
  MACROBLOCKD *const xd = &x->e_mbd;
  MODE_INFO *const mi = xd->mi[0];
  int_mv *const candidates = x->mbmi_ext->ref_mvs[ref_frame];
  const struct scale_factors *const sf = &cm->frame_refs[ref_frame - 1].sf;
  MB_MODE_INFO_EXT *const mbmi_ext = x->mbmi_ext;

  assert(yv12 != NULL);

  // TODO(jkoleszar): Is the UV buffer ever used here? If so, need to make this
  // use the UV scaling factors.
  av1_setup_pred_block(xd, yv12_mb[ref_frame], yv12, mi_row, mi_col, sf, sf);

  // Gets an initial list of candidate vectors from neighbours and orders them
  av1_find_mv_refs(
      cm, xd, mi, ref_frame,
#if CONFIG_REF_MV
      &mbmi_ext->ref_mv_count[ref_frame], mbmi_ext->ref_mv_stack[ref_frame],
#if CONFIG_EXT_INTER
      mbmi_ext->compound_mode_context,
#endif  // CONFIG_EXT_INTER
#endif
      candidates, mi_row, mi_col, NULL, NULL, mbmi_ext->mode_context);

  // Candidate refinement carried out at encoder and decoder
  av1_find_best_ref_mvs(cm->allow_high_precision_mv, candidates,
                        &frame_nearest_mv[ref_frame],
                        &frame_near_mv[ref_frame]);

// Further refinement that is encode side only to test the top few candidates
// in full and choose the best as the centre point for subsequent searches.
// The current implementation doesn't support scaling.
#if CONFIG_CB4X4
  av1_mv_pred(cpi, x, yv12_mb[ref_frame][0].buf, yv12->y_stride, ref_frame,
              block_size);
#else
  if (!av1_is_scaled(sf) && block_size >= BLOCK_8X8)
    av1_mv_pred(cpi, x, yv12_mb[ref_frame][0].buf, yv12->y_stride, ref_frame,
                block_size);
#endif
}

static void single_motion_search(const AV1_COMP *const cpi, MACROBLOCK *x,
                                 BLOCK_SIZE bsize, int mi_row, int mi_col,
#if CONFIG_EXT_INTER
                                 int ref_idx, int mv_idx,
#endif  // CONFIG_EXT_INTER
                                 int *rate_mv) {
  MACROBLOCKD *xd = &x->e_mbd;
  const AV1_COMMON *cm = &cpi->common;
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  struct buf_2d backup_yv12[MAX_MB_PLANE] = { { 0, 0, 0, 0, 0 } };
  int bestsme = INT_MAX;
  int step_param;
  int sadpb = x->sadperbit16;
  MV mvp_full;
#if CONFIG_EXT_INTER
  int ref = mbmi->ref_frame[ref_idx];
  MV ref_mv = x->mbmi_ext->ref_mvs[ref][mv_idx].as_mv;
#else
  int ref = mbmi->ref_frame[0];
  MV ref_mv = x->mbmi_ext->ref_mvs[ref][0].as_mv;
  int ref_idx = 0;
#endif  // CONFIG_EXT_INTER

  int tmp_col_min = x->mv_col_min;
  int tmp_col_max = x->mv_col_max;
  int tmp_row_min = x->mv_row_min;
  int tmp_row_max = x->mv_row_max;
  int cost_list[5];

  const YV12_BUFFER_CONFIG *scaled_ref_frame =
      av1_get_scaled_ref_frame(cpi, ref);

  MV pred_mv[3];
  pred_mv[0] = x->mbmi_ext->ref_mvs[ref][0].as_mv;
  pred_mv[1] = x->mbmi_ext->ref_mvs[ref][1].as_mv;
  pred_mv[2] = x->pred_mv[ref];

  if (scaled_ref_frame) {
    int i;
    // Swap out the reference frame for a version that's been scaled to
    // match the resolution of the current frame, allowing the existing
    // motion search code to be used without additional modifications.
    for (i = 0; i < MAX_MB_PLANE; i++)
      backup_yv12[i] = xd->plane[i].pre[ref_idx];

    av1_setup_pre_planes(xd, ref_idx, scaled_ref_frame, mi_row, mi_col, NULL);
  }

  av1_set_mv_search_range(x, &ref_mv);

#if CONFIG_REF_MV
  av1_set_mvcost(x, ref, ref_idx, mbmi->ref_mv_idx);
#endif

  // Work out the size of the first step in the mv step search.
  // 0 here is maximum length first step. 1 is AOMMAX >> 1 etc.
  if (cpi->sf.mv.auto_mv_step_size && cm->show_frame) {
    // Take wtd average of the step_params based on the last frame's
    // max mv magnitude and that based on the best ref mvs of the current
    // block for the given reference.
    step_param =
        (av1_init_search_range(x->max_mv_context[ref]) + cpi->mv_step_param) /
        2;
  } else {
    step_param = cpi->mv_step_param;
  }

  if (cpi->sf.adaptive_motion_search && bsize < cm->sb_size) {
    int boffset =
        2 * (b_width_log2_lookup[cm->sb_size] -
             AOMMIN(b_height_log2_lookup[bsize], b_width_log2_lookup[bsize]));
    step_param = AOMMAX(step_param, boffset);
  }

  if (cpi->sf.adaptive_motion_search) {
    int bwl = b_width_log2_lookup[bsize];
    int bhl = b_height_log2_lookup[bsize];
    int tlevel = x->pred_mv_sad[ref] >> (bwl + bhl + 4);

    if (tlevel < 5) step_param += 2;

    // prev_mv_sad is not setup for dynamically scaled frames.
    if (cpi->oxcf.resize_mode != RESIZE_DYNAMIC) {
      int i;
      for (i = LAST_FRAME; i <= ALTREF_FRAME && cm->show_frame; ++i) {
        if ((x->pred_mv_sad[ref] >> 3) > x->pred_mv_sad[i]) {
          x->pred_mv[ref].row = 0;
          x->pred_mv[ref].col = 0;
          x->best_mv.as_int = INVALID_MV;

          if (scaled_ref_frame) {
            int j;
            for (j = 0; j < MAX_MB_PLANE; ++j)
              xd->plane[j].pre[ref_idx] = backup_yv12[j];
          }
          return;
        }
      }
    }
  }

  av1_set_mv_search_range(x, &ref_mv);

#if CONFIG_MOTION_VAR
  if (mbmi->motion_mode != SIMPLE_TRANSLATION)
    mvp_full = mbmi->mv[0].as_mv;
  else
#endif  // CONFIG_MOTION_VAR
    mvp_full = pred_mv[x->mv_best_ref_index[ref]];

  mvp_full.col >>= 3;
  mvp_full.row >>= 3;

  x->best_mv.as_int = x->second_best_mv.as_int = INVALID_MV;

#if CONFIG_MOTION_VAR
  switch (mbmi->motion_mode) {
    case SIMPLE_TRANSLATION:
#endif  // CONFIG_MOTION_VAR
      bestsme = av1_full_pixel_search(cpi, x, bsize, &mvp_full, step_param,
                                      sadpb, cond_cost_list(cpi, cost_list),
                                      &ref_mv, INT_MAX, 1);
#if CONFIG_MOTION_VAR
      break;
    case OBMC_CAUSAL:
      bestsme = av1_obmc_full_pixel_diamond(
          cpi, x, &mvp_full, step_param, sadpb,
          MAX_MVSEARCH_STEPS - 1 - step_param, 1, &cpi->fn_ptr[bsize], &ref_mv,
          &(x->best_mv.as_mv), 0);
      break;
    default: assert("Invalid motion mode!\n");
  }
#endif  // CONFIG_MOTION_VAR

  x->mv_col_min = tmp_col_min;
  x->mv_col_max = tmp_col_max;
  x->mv_row_min = tmp_row_min;
  x->mv_row_max = tmp_row_max;

  if (bestsme < INT_MAX) {
    int dis; /* TODO: use dis in distortion calculation later. */
#if CONFIG_MOTION_VAR
    switch (mbmi->motion_mode) {
      case SIMPLE_TRANSLATION:
#endif  // CONFIG_MOTION_VAR
        if (cpi->sf.use_upsampled_references) {
          int best_mv_var;
          const int try_second = x->second_best_mv.as_int != INVALID_MV &&
                                 x->second_best_mv.as_int != x->best_mv.as_int;
          const int pw = block_size_wide[bsize];
          const int ph = block_size_high[bsize];
          // Use up-sampled reference frames.
          struct macroblockd_plane *const pd = &xd->plane[0];
          struct buf_2d backup_pred = pd->pre[ref_idx];
          const YV12_BUFFER_CONFIG *upsampled_ref = get_upsampled_ref(cpi, ref);

          // Set pred for Y plane
          setup_pred_plane(
              &pd->pre[ref_idx], upsampled_ref->y_buffer,
              upsampled_ref->y_crop_width, upsampled_ref->y_crop_height,
              upsampled_ref->y_stride, (mi_row << 3), (mi_col << 3), NULL,
              pd->subsampling_x, pd->subsampling_y);

          best_mv_var = cpi->find_fractional_mv_step(
              x, &ref_mv, cm->allow_high_precision_mv, x->errorperbit,
              &cpi->fn_ptr[bsize], cpi->sf.mv.subpel_force_stop,
              cpi->sf.mv.subpel_iters_per_step, cond_cost_list(cpi, cost_list),
              x->nmvjointcost, x->mvcost, &dis, &x->pred_sse[ref], NULL, pw, ph,
              1);

          if (try_second) {
            const int minc = AOMMAX(x->mv_col_min * 8, ref_mv.col - MV_MAX);
            const int maxc = AOMMIN(x->mv_col_max * 8, ref_mv.col + MV_MAX);
            const int minr = AOMMAX(x->mv_row_min * 8, ref_mv.row - MV_MAX);
            const int maxr = AOMMIN(x->mv_row_max * 8, ref_mv.row + MV_MAX);
            int this_var;
            MV best_mv = x->best_mv.as_mv;

            x->best_mv = x->second_best_mv;
            if (x->best_mv.as_mv.row * 8 <= maxr &&
                x->best_mv.as_mv.row * 8 >= minr &&
                x->best_mv.as_mv.col * 8 <= maxc &&
                x->best_mv.as_mv.col * 8 >= minc) {
              this_var = cpi->find_fractional_mv_step(
                  x, &ref_mv, cm->allow_high_precision_mv, x->errorperbit,
                  &cpi->fn_ptr[bsize], cpi->sf.mv.subpel_force_stop,
                  cpi->sf.mv.subpel_iters_per_step,
                  cond_cost_list(cpi, cost_list), x->nmvjointcost, x->mvcost,
                  &dis, &x->pred_sse[ref], NULL, pw, ph, 1);
              if (this_var < best_mv_var) best_mv = x->best_mv.as_mv;
              x->best_mv.as_mv = best_mv;
            }
          }

          // Restore the reference frames.
          pd->pre[ref_idx] = backup_pred;
        } else {
          cpi->find_fractional_mv_step(
              x, &ref_mv, cm->allow_high_precision_mv, x->errorperbit,
              &cpi->fn_ptr[bsize], cpi->sf.mv.subpel_force_stop,
              cpi->sf.mv.subpel_iters_per_step, cond_cost_list(cpi, cost_list),
              x->nmvjointcost, x->mvcost, &dis, &x->pred_sse[ref], NULL, 0, 0,
              0);
        }
#if CONFIG_MOTION_VAR
        break;
      case OBMC_CAUSAL:
        av1_find_best_obmc_sub_pixel_tree_up(
            cpi, x, mi_row, mi_col, &x->best_mv.as_mv, &ref_mv,
            cm->allow_high_precision_mv, x->errorperbit, &cpi->fn_ptr[bsize],
            cpi->sf.mv.subpel_force_stop, cpi->sf.mv.subpel_iters_per_step,
            x->nmvjointcost, x->mvcost, &dis, &x->pred_sse[ref], 0,
            cpi->sf.use_upsampled_references);
        break;
      default: assert("Invalid motion mode!\n");
    }
#endif  // CONFIG_MOTION_VAR
  }
  *rate_mv = av1_mv_bit_cost(&x->best_mv.as_mv, &ref_mv, x->nmvjointcost,
                             x->mvcost, MV_COST_WEIGHT);

#if CONFIG_MOTION_VAR
  if (cpi->sf.adaptive_motion_search && mbmi->motion_mode == SIMPLE_TRANSLATION)
#else
  if (cpi->sf.adaptive_motion_search)
#endif  // CONFIG_MOTION_VAR
    x->pred_mv[ref] = x->best_mv.as_mv;

  if (scaled_ref_frame) {
    int i;
    for (i = 0; i < MAX_MB_PLANE; i++)
      xd->plane[i].pre[ref_idx] = backup_yv12[i];
  }
}

static INLINE void restore_dst_buf(MACROBLOCKD *xd, BUFFER_SET dst) {
  int i;
  for (i = 0; i < MAX_MB_PLANE; i++) {
    xd->plane[i].dst.buf = dst.plane[i];
    xd->plane[i].dst.stride = dst.stride[i];
  }
}

#if CONFIG_EXT_INTER
static void do_masked_motion_search(const AV1_COMP *const cpi, MACROBLOCK *x,
                                    const uint8_t *mask, int mask_stride,
                                    BLOCK_SIZE bsize, int mi_row, int mi_col,
                                    int_mv *tmp_mv, int *rate_mv, int ref_idx,
                                    int mv_idx) {
  MACROBLOCKD *xd = &x->e_mbd;
  const AV1_COMMON *cm = &cpi->common;
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  struct buf_2d backup_yv12[MAX_MB_PLANE] = { { 0, 0, 0, 0, 0 } };
  int bestsme = INT_MAX;
  int step_param;
  int sadpb = x->sadperbit16;
  MV mvp_full;
  int ref = mbmi->ref_frame[ref_idx];
  MV ref_mv = x->mbmi_ext->ref_mvs[ref][mv_idx].as_mv;

  int tmp_col_min = x->mv_col_min;
  int tmp_col_max = x->mv_col_max;
  int tmp_row_min = x->mv_row_min;
  int tmp_row_max = x->mv_row_max;

  const YV12_BUFFER_CONFIG *scaled_ref_frame =
      av1_get_scaled_ref_frame(cpi, ref);
  int i;

  MV pred_mv[3];
  pred_mv[0] = x->mbmi_ext->ref_mvs[ref][0].as_mv;
  pred_mv[1] = x->mbmi_ext->ref_mvs[ref][1].as_mv;
  pred_mv[2] = x->pred_mv[ref];

#if CONFIG_REF_MV
  av1_set_mvcost(x, ref, ref_idx, mbmi->ref_mv_idx);
#endif

  if (scaled_ref_frame) {
    // Swap out the reference frame for a version that's been scaled to
    // match the resolution of the current frame, allowing the existing
    // motion search code to be used without additional modifications.
    for (i = 0; i < MAX_MB_PLANE; i++)
      backup_yv12[i] = xd->plane[i].pre[ref_idx];

    av1_setup_pre_planes(xd, ref_idx, scaled_ref_frame, mi_row, mi_col, NULL);
  }

  av1_set_mv_search_range(x, &ref_mv);

  // Work out the size of the first step in the mv step search.
  // 0 here is maximum length first step. 1 is MAX >> 1 etc.
  if (cpi->sf.mv.auto_mv_step_size && cm->show_frame) {
    // Take wtd average of the step_params based on the last frame's
    // max mv magnitude and that based on the best ref mvs of the current
    // block for the given reference.
    step_param =
        (av1_init_search_range(x->max_mv_context[ref]) + cpi->mv_step_param) /
        2;
  } else {
    step_param = cpi->mv_step_param;
  }

  // TODO(debargha): is show_frame needed here?
  if (cpi->sf.adaptive_motion_search && bsize < cm->sb_size && cm->show_frame) {
    int boffset =
        2 * (b_width_log2_lookup[cm->sb_size] -
             AOMMIN(b_height_log2_lookup[bsize], b_width_log2_lookup[bsize]));
    step_param = AOMMAX(step_param, boffset);
  }

  if (cpi->sf.adaptive_motion_search) {
    int bwl = b_width_log2_lookup[bsize];
    int bhl = b_height_log2_lookup[bsize];
    int tlevel = x->pred_mv_sad[ref] >> (bwl + bhl + 4);

    if (tlevel < 5) step_param += 2;

    // prev_mv_sad is not setup for dynamically scaled frames.
    if (cpi->oxcf.resize_mode != RESIZE_DYNAMIC) {
      for (i = LAST_FRAME; i <= ALTREF_FRAME && cm->show_frame; ++i) {
        if ((x->pred_mv_sad[ref] >> 3) > x->pred_mv_sad[i]) {
          x->pred_mv[ref].row = 0;
          x->pred_mv[ref].col = 0;
          tmp_mv->as_int = INVALID_MV;

          if (scaled_ref_frame) {
            int j;
            for (j = 0; j < MAX_MB_PLANE; ++j)
              xd->plane[j].pre[ref_idx] = backup_yv12[j];
          }
          return;
        }
      }
    }
  }

  mvp_full = pred_mv[x->mv_best_ref_index[ref]];

  mvp_full.col >>= 3;
  mvp_full.row >>= 3;

  bestsme = av1_masked_full_pixel_diamond(
      cpi, x, mask, mask_stride, &mvp_full, step_param, sadpb,
      MAX_MVSEARCH_STEPS - 1 - step_param, 1, &cpi->fn_ptr[bsize], &ref_mv,
      &tmp_mv->as_mv, ref_idx);

  x->mv_col_min = tmp_col_min;
  x->mv_col_max = tmp_col_max;
  x->mv_row_min = tmp_row_min;
  x->mv_row_max = tmp_row_max;

  if (bestsme < INT_MAX) {
    int dis; /* TODO: use dis in distortion calculation later. */
    av1_find_best_masked_sub_pixel_tree_up(
        cpi, x, mask, mask_stride, mi_row, mi_col, &tmp_mv->as_mv, &ref_mv,
        cm->allow_high_precision_mv, x->errorperbit, &cpi->fn_ptr[bsize],
        cpi->sf.mv.subpel_force_stop, cpi->sf.mv.subpel_iters_per_step,
        x->nmvjointcost, x->mvcost, &dis, &x->pred_sse[ref], ref_idx,
        cpi->sf.use_upsampled_references);
  }
  *rate_mv = av1_mv_bit_cost(&tmp_mv->as_mv, &ref_mv, x->nmvjointcost,
                             x->mvcost, MV_COST_WEIGHT);

  if (cpi->sf.adaptive_motion_search && cm->show_frame)
    x->pred_mv[ref] = tmp_mv->as_mv;

  if (scaled_ref_frame) {
    for (i = 0; i < MAX_MB_PLANE; i++)
      xd->plane[i].pre[ref_idx] = backup_yv12[i];
  }
}

static void do_masked_motion_search_indexed(
    const AV1_COMP *const cpi, MACROBLOCK *x,
    const INTERINTER_COMPOUND_DATA *const comp_data, BLOCK_SIZE bsize,
    int mi_row, int mi_col, int_mv *tmp_mv, int *rate_mv, int mv_idx[2],
    int which) {
  // NOTE: which values: 0 - 0 only, 1 - 1 only, 2 - both
  MACROBLOCKD *xd = &x->e_mbd;
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  BLOCK_SIZE sb_type = mbmi->sb_type;
  const uint8_t *mask;
  const int mask_stride = block_size_wide[bsize];

  mask = av1_get_compound_type_mask(comp_data, sb_type);

  if (which == 0 || which == 2)
    do_masked_motion_search(cpi, x, mask, mask_stride, bsize, mi_row, mi_col,
                            &tmp_mv[0], &rate_mv[0], 0, mv_idx[0]);

  if (which == 1 || which == 2) {
// get the negative mask
#if CONFIG_COMPOUND_SEGMENT
    uint8_t inv_mask_buf[2 * MAX_SB_SQUARE];
    const int h = block_size_high[bsize];
    mask = av1_get_compound_type_mask_inverse(
        comp_data, inv_mask_buf, h, mask_stride, mask_stride, sb_type);
#else
    mask = av1_get_compound_type_mask_inverse(comp_data, sb_type);
#endif
    do_masked_motion_search(cpi, x, mask, mask_stride, bsize, mi_row, mi_col,
                            &tmp_mv[1], &rate_mv[1], 1, mv_idx[1]);
  }
}
#endif  // CONFIG_EXT_INTER

// In some situations we want to discount tha pparent cost of a new motion
// vector. Where there is a subtle motion field and especially where there is
// low spatial complexity then it can be hard to cover the cost of a new motion
// vector in a single block, even if that motion vector reduces distortion.
// However, once established that vector may be usable through the nearest and
// near mv modes to reduce distortion in subsequent blocks and also improve
// visual quality.
static int discount_newmv_test(const AV1_COMP *const cpi, int this_mode,
                               int_mv this_mv,
                               int_mv (*mode_mv)[TOTAL_REFS_PER_FRAME],
                               int ref_frame) {
  return (!cpi->rc.is_src_frame_alt_ref && (this_mode == NEWMV) &&
          (this_mv.as_int != 0) &&
          ((mode_mv[NEARESTMV][ref_frame].as_int == 0) ||
           (mode_mv[NEARESTMV][ref_frame].as_int == INVALID_MV)) &&
          ((mode_mv[NEARMV][ref_frame].as_int == 0) ||
           (mode_mv[NEARMV][ref_frame].as_int == INVALID_MV)));
}

#define LEFT_TOP_MARGIN ((AOM_BORDER_IN_PIXELS - AOM_INTERP_EXTEND) << 3)
#define RIGHT_BOTTOM_MARGIN ((AOM_BORDER_IN_PIXELS - AOM_INTERP_EXTEND) << 3)

// TODO(jingning): this mv clamping function should be block size dependent.
static INLINE void clamp_mv2(MV *mv, const MACROBLOCKD *xd) {
  clamp_mv(mv, xd->mb_to_left_edge - LEFT_TOP_MARGIN,
           xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN,
           xd->mb_to_top_edge - LEFT_TOP_MARGIN,
           xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN);
}

#if CONFIG_EXT_INTER
static int estimate_wedge_sign(const AV1_COMP *cpi, const MACROBLOCK *x,
                               const BLOCK_SIZE bsize, const uint8_t *pred0,
                               int stride0, const uint8_t *pred1, int stride1) {
  const struct macroblock_plane *const p = &x->plane[0];
  const uint8_t *src = p->src.buf;
  int src_stride = p->src.stride;
  const int f_index = bsize - BLOCK_8X8;
  const int bw = block_size_wide[bsize];
  const int bh = block_size_high[bsize];
  uint32_t esq[2][4], var;
  int64_t tl, br;

#if CONFIG_AOM_HIGHBITDEPTH
  if (x->e_mbd.cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    pred0 = CONVERT_TO_BYTEPTR(pred0);
    pred1 = CONVERT_TO_BYTEPTR(pred1);
  }
#endif  // CONFIG_AOM_HIGHBITDEPTH

  var = cpi->fn_ptr[f_index].vf(src, src_stride, pred0, stride0, &esq[0][0]);
  var = cpi->fn_ptr[f_index].vf(src + bw / 2, src_stride, pred0 + bw / 2,
                                stride0, &esq[0][1]);
  var = cpi->fn_ptr[f_index].vf(src + bh / 2 * src_stride, src_stride,
                                pred0 + bh / 2 * stride0, stride0, &esq[0][2]);
  var = cpi->fn_ptr[f_index].vf(src + bh / 2 * src_stride + bw / 2, src_stride,
                                pred0 + bh / 2 * stride0 + bw / 2, stride0,
                                &esq[0][3]);
  var = cpi->fn_ptr[f_index].vf(src, src_stride, pred1, stride1, &esq[1][0]);
  var = cpi->fn_ptr[f_index].vf(src + bw / 2, src_stride, pred1 + bw / 2,
                                stride1, &esq[1][1]);
  var = cpi->fn_ptr[f_index].vf(src + bh / 2 * src_stride, src_stride,
                                pred1 + bh / 2 * stride1, stride0, &esq[1][2]);
  var = cpi->fn_ptr[f_index].vf(src + bh / 2 * src_stride + bw / 2, src_stride,
                                pred1 + bh / 2 * stride1 + bw / 2, stride0,
                                &esq[1][3]);
  (void)var;

  tl = (int64_t)(esq[0][0] + esq[0][1] + esq[0][2]) -
       (int64_t)(esq[1][0] + esq[1][1] + esq[1][2]);
  br = (int64_t)(esq[1][3] + esq[1][1] + esq[1][2]) -
       (int64_t)(esq[0][3] + esq[0][1] + esq[0][2]);
  return (tl + br > 0);
}
#endif  // CONFIG_EXT_INTER

#if !CONFIG_DUAL_FILTER
static InterpFilter predict_interp_filter(
    const AV1_COMP *cpi, const MACROBLOCK *x, const BLOCK_SIZE bsize,
    const int mi_row, const int mi_col,
    InterpFilter (*single_filter)[TOTAL_REFS_PER_FRAME]) {
  InterpFilter best_filter = SWITCHABLE;
  const AV1_COMMON *cm = &cpi->common;
  const MACROBLOCKD *xd = &x->e_mbd;
  int bsl = mi_width_log2_lookup[bsize];
  int pred_filter_search =
      cpi->sf.cb_pred_filter_search
          ? (((mi_row + mi_col) >> bsl) +
             get_chessboard_index(cm->current_video_frame)) &
                0x1
          : 0;
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  const int is_comp_pred = has_second_ref(mbmi);
  const int this_mode = mbmi->mode;
  int refs[2] = { mbmi->ref_frame[0],
                  (mbmi->ref_frame[1] < 0 ? 0 : mbmi->ref_frame[1]) };
  if (pred_filter_search) {
    InterpFilter af = SWITCHABLE, lf = SWITCHABLE;
    if (xd->up_available) af = xd->mi[-xd->mi_stride]->mbmi.interp_filter;
    if (xd->left_available) lf = xd->mi[-1]->mbmi.interp_filter;

#if CONFIG_EXT_INTER
    if ((this_mode != NEWMV && this_mode != NEWFROMNEARMV &&
         this_mode != NEW_NEWMV) ||
        (af == lf))
#else
    if ((this_mode != NEWMV) || (af == lf))
#endif  // CONFIG_EXT_INTER
      best_filter = af;
  }
  if (is_comp_pred) {
    if (cpi->sf.adaptive_mode_search) {
#if CONFIG_EXT_INTER
      switch (this_mode) {
        case NEAREST_NEARESTMV:
          if (single_filter[NEARESTMV][refs[0]] ==
              single_filter[NEARESTMV][refs[1]])
            best_filter = single_filter[NEARESTMV][refs[0]];
          break;
        case NEAREST_NEARMV:
          if (single_filter[NEARESTMV][refs[0]] ==
              single_filter[NEARMV][refs[1]])
            best_filter = single_filter[NEARESTMV][refs[0]];
          break;
        case NEAR_NEARESTMV:
          if (single_filter[NEARMV][refs[0]] ==
              single_filter[NEARESTMV][refs[1]])
            best_filter = single_filter[NEARMV][refs[0]];
          break;
        case NEAR_NEARMV:
          if (single_filter[NEARMV][refs[0]] == single_filter[NEARMV][refs[1]])
            best_filter = single_filter[NEARMV][refs[0]];
          break;
        case ZERO_ZEROMV:
          if (single_filter[ZEROMV][refs[0]] == single_filter[ZEROMV][refs[1]])
            best_filter = single_filter[ZEROMV][refs[0]];
          break;
        case NEW_NEWMV:
          if (single_filter[NEWMV][refs[0]] == single_filter[NEWMV][refs[1]])
            best_filter = single_filter[NEWMV][refs[0]];
          break;
        case NEAREST_NEWMV:
          if (single_filter[NEARESTMV][refs[0]] ==
              single_filter[NEWMV][refs[1]])
            best_filter = single_filter[NEARESTMV][refs[0]];
          break;
        case NEAR_NEWMV:
          if (single_filter[NEARMV][refs[0]] == single_filter[NEWMV][refs[1]])
            best_filter = single_filter[NEARMV][refs[0]];
          break;
        case NEW_NEARESTMV:
          if (single_filter[NEWMV][refs[0]] ==
              single_filter[NEARESTMV][refs[1]])
            best_filter = single_filter[NEWMV][refs[0]];
          break;
        case NEW_NEARMV:
          if (single_filter[NEWMV][refs[0]] == single_filter[NEARMV][refs[1]])
            best_filter = single_filter[NEWMV][refs[0]];
          break;
        default:
          if (single_filter[this_mode][refs[0]] ==
              single_filter[this_mode][refs[1]])
            best_filter = single_filter[this_mode][refs[0]];
          break;
      }
#else
      if (single_filter[this_mode][refs[0]] ==
          single_filter[this_mode][refs[1]])
        best_filter = single_filter[this_mode][refs[0]];
#endif  // CONFIG_EXT_INTER
    }
  }
  if (x->source_variance < cpi->sf.disable_filter_search_var_thresh) {
    best_filter = EIGHTTAP_REGULAR;
  }
  return best_filter;
}
#endif

#if CONFIG_EXT_INTER
// Choose the best wedge index and sign
static int64_t pick_wedge(const AV1_COMP *const cpi, const MACROBLOCK *const x,
                          const BLOCK_SIZE bsize, const uint8_t *const p0,
                          const uint8_t *const p1, int *const best_wedge_sign,
                          int *const best_wedge_index) {
  const MACROBLOCKD *const xd = &x->e_mbd;
  const struct buf_2d *const src = &x->plane[0].src;
  const int bw = block_size_wide[bsize];
  const int bh = block_size_high[bsize];
  const int N = bw * bh;
  int rate;
  int64_t dist;
  int64_t rd, best_rd = INT64_MAX;
  int wedge_index;
  int wedge_sign;
  int wedge_types = (1 << get_wedge_bits_lookup(bsize));
  const uint8_t *mask;
  uint64_t sse;
#if CONFIG_AOM_HIGHBITDEPTH
  const int hbd = xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH;
  const int bd_round = hbd ? (xd->bd - 8) * 2 : 0;
#else
  const int bd_round = 0;
#endif  // CONFIG_AOM_HIGHBITDEPTH

  DECLARE_ALIGNED(32, int16_t, r0[MAX_SB_SQUARE]);
  DECLARE_ALIGNED(32, int16_t, r1[MAX_SB_SQUARE]);
  DECLARE_ALIGNED(32, int16_t, d10[MAX_SB_SQUARE]);
  DECLARE_ALIGNED(32, int16_t, ds[MAX_SB_SQUARE]);

  int64_t sign_limit;

#if CONFIG_AOM_HIGHBITDEPTH
  if (hbd) {
    aom_highbd_subtract_block(bh, bw, r0, bw, src->buf, src->stride,
                              CONVERT_TO_BYTEPTR(p0), bw, xd->bd);
    aom_highbd_subtract_block(bh, bw, r1, bw, src->buf, src->stride,
                              CONVERT_TO_BYTEPTR(p1), bw, xd->bd);
    aom_highbd_subtract_block(bh, bw, d10, bw, CONVERT_TO_BYTEPTR(p1), bw,
                              CONVERT_TO_BYTEPTR(p0), bw, xd->bd);
  } else  // NOLINT
#endif    // CONFIG_AOM_HIGHBITDEPTH
  {
    aom_subtract_block(bh, bw, r0, bw, src->buf, src->stride, p0, bw);
    aom_subtract_block(bh, bw, r1, bw, src->buf, src->stride, p1, bw);
    aom_subtract_block(bh, bw, d10, bw, p1, bw, p0, bw);
  }

  sign_limit = ((int64_t)aom_sum_squares_i16(r0, N) -
                (int64_t)aom_sum_squares_i16(r1, N)) *
               (1 << WEDGE_WEIGHT_BITS) / 2;

  if (N < 64)
    av1_wedge_compute_delta_squares_c(ds, r0, r1, N);
  else
    av1_wedge_compute_delta_squares(ds, r0, r1, N);

  for (wedge_index = 0; wedge_index < wedge_types; ++wedge_index) {
    mask = av1_get_contiguous_soft_mask(wedge_index, 0, bsize);

    // TODO(jingning): Make sse2 functions support N = 16 case
    if (N < 64)
      wedge_sign = av1_wedge_sign_from_residuals_c(ds, mask, N, sign_limit);
    else
      wedge_sign = av1_wedge_sign_from_residuals(ds, mask, N, sign_limit);

    mask = av1_get_contiguous_soft_mask(wedge_index, wedge_sign, bsize);
    if (N < 64)
      sse = av1_wedge_sse_from_residuals_c(r1, d10, mask, N);
    else
      sse = av1_wedge_sse_from_residuals(r1, d10, mask, N);
    sse = ROUND_POWER_OF_TWO(sse, bd_round);

    model_rd_from_sse(cpi, xd, bsize, 0, sse, &rate, &dist);
    rd = RDCOST(x->rdmult, x->rddiv, rate, dist);

    if (rd < best_rd) {
      *best_wedge_index = wedge_index;
      *best_wedge_sign = wedge_sign;
      best_rd = rd;
    }
  }

  return best_rd;
}

// Choose the best wedge index the specified sign
static int64_t pick_wedge_fixed_sign(
    const AV1_COMP *const cpi, const MACROBLOCK *const x,
    const BLOCK_SIZE bsize, const uint8_t *const p0, const uint8_t *const p1,
    const int wedge_sign, int *const best_wedge_index) {
  const MACROBLOCKD *const xd = &x->e_mbd;
  const struct buf_2d *const src = &x->plane[0].src;
  const int bw = block_size_wide[bsize];
  const int bh = block_size_high[bsize];
  const int N = bw * bh;
  int rate;
  int64_t dist;
  int64_t rd, best_rd = INT64_MAX;
  int wedge_index;
  int wedge_types = (1 << get_wedge_bits_lookup(bsize));
  const uint8_t *mask;
  uint64_t sse;
#if CONFIG_AOM_HIGHBITDEPTH
  const int hbd = xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH;
  const int bd_round = hbd ? (xd->bd - 8) * 2 : 0;
#else
  const int bd_round = 0;
#endif  // CONFIG_AOM_HIGHBITDEPTH

  DECLARE_ALIGNED(32, int16_t, r1[MAX_SB_SQUARE]);
  DECLARE_ALIGNED(32, int16_t, d10[MAX_SB_SQUARE]);

#if CONFIG_AOM_HIGHBITDEPTH
  if (hbd) {
    aom_highbd_subtract_block(bh, bw, r1, bw, src->buf, src->stride,
                              CONVERT_TO_BYTEPTR(p1), bw, xd->bd);
    aom_highbd_subtract_block(bh, bw, d10, bw, CONVERT_TO_BYTEPTR(p1), bw,
                              CONVERT_TO_BYTEPTR(p0), bw, xd->bd);
  } else  // NOLINT
#endif    // CONFIG_AOM_HIGHBITDEPTH
  {
    aom_subtract_block(bh, bw, r1, bw, src->buf, src->stride, p1, bw);
    aom_subtract_block(bh, bw, d10, bw, p1, bw, p0, bw);
  }

  for (wedge_index = 0; wedge_index < wedge_types; ++wedge_index) {
    mask = av1_get_contiguous_soft_mask(wedge_index, wedge_sign, bsize);
    if (N < 64)
      sse = av1_wedge_sse_from_residuals_c(r1, d10, mask, N);
    else
      sse = av1_wedge_sse_from_residuals(r1, d10, mask, N);
    sse = ROUND_POWER_OF_TWO(sse, bd_round);

    model_rd_from_sse(cpi, xd, bsize, 0, sse, &rate, &dist);
    rd = RDCOST(x->rdmult, x->rddiv, rate, dist);

    if (rd < best_rd) {
      *best_wedge_index = wedge_index;
      best_rd = rd;
    }
  }

  return best_rd;
}

static int64_t pick_interinter_wedge(const AV1_COMP *const cpi,
                                     const MACROBLOCK *const x,
                                     const BLOCK_SIZE bsize,
                                     const uint8_t *const p0,
                                     const uint8_t *const p1) {
  const MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  const int bw = block_size_wide[bsize];

  int64_t rd;
  int wedge_index = -1;
  int wedge_sign = 0;

  assert(is_interinter_compound_used(COMPOUND_WEDGE, bsize));

  if (cpi->sf.fast_wedge_sign_estimate) {
    wedge_sign = estimate_wedge_sign(cpi, x, bsize, p0, bw, p1, bw);
    rd = pick_wedge_fixed_sign(cpi, x, bsize, p0, p1, wedge_sign, &wedge_index);
  } else {
    rd = pick_wedge(cpi, x, bsize, p0, p1, &wedge_sign, &wedge_index);
  }

  mbmi->interinter_compound_data.wedge_sign = wedge_sign;
  mbmi->interinter_compound_data.wedge_index = wedge_index;
  return rd;
}

#if CONFIG_COMPOUND_SEGMENT
static int64_t pick_interinter_seg_mask(const AV1_COMP *const cpi,
                                        const MACROBLOCK *const x,
                                        const BLOCK_SIZE bsize,
                                        const uint8_t *const p0,
                                        const uint8_t *const p1) {
  const MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  const struct buf_2d *const src = &x->plane[0].src;
  const int bw = block_size_wide[bsize];
  const int bh = block_size_high[bsize];
  const int N = bw * bh;
  int rate;
  uint64_t sse;
  int64_t dist;
  int rd0;
  SEG_MASK_TYPE cur_mask_type;
  int64_t best_rd = INT64_MAX;
  SEG_MASK_TYPE best_mask_type = 0;
#if CONFIG_AOM_HIGHBITDEPTH
  const int hbd = xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH;
  const int bd_round = hbd ? (xd->bd - 8) * 2 : 0;
#else
  const int bd_round = 0;
#endif  // CONFIG_AOM_HIGHBITDEPTH
  INTERINTER_COMPOUND_DATA *comp_data = &mbmi->interinter_compound_data;
  DECLARE_ALIGNED(32, int16_t, r0[MAX_SB_SQUARE]);
  DECLARE_ALIGNED(32, int16_t, r1[MAX_SB_SQUARE]);
  DECLARE_ALIGNED(32, int16_t, d10[MAX_SB_SQUARE]);

#if CONFIG_AOM_HIGHBITDEPTH
  if (hbd) {
    aom_highbd_subtract_block(bh, bw, r0, bw, src->buf, src->stride,
                              CONVERT_TO_BYTEPTR(p0), bw, xd->bd);
    aom_highbd_subtract_block(bh, bw, r1, bw, src->buf, src->stride,
                              CONVERT_TO_BYTEPTR(p1), bw, xd->bd);
    aom_highbd_subtract_block(bh, bw, d10, bw, CONVERT_TO_BYTEPTR(p1), bw,
                              CONVERT_TO_BYTEPTR(p0), bw, xd->bd);
  } else  // NOLINT
#endif    // CONFIG_AOM_HIGHBITDEPTH
  {
    aom_subtract_block(bh, bw, r0, bw, src->buf, src->stride, p0, bw);
    aom_subtract_block(bh, bw, r1, bw, src->buf, src->stride, p1, bw);
    aom_subtract_block(bh, bw, d10, bw, p1, bw, p0, bw);
  }

  // try each mask type and its inverse
  for (cur_mask_type = 0; cur_mask_type < SEG_MASK_TYPES; cur_mask_type++) {
// build mask and inverse
#if CONFIG_AOM_HIGHBITDEPTH
    if (hbd)
      build_compound_seg_mask_highbd(
          comp_data->seg_mask, cur_mask_type, CONVERT_TO_BYTEPTR(p0), bw,
          CONVERT_TO_BYTEPTR(p1), bw, bsize, bh, bw, xd->bd);
    else
#endif  // CONFIG_AOM_HIGHBITDEPTH
      build_compound_seg_mask(comp_data->seg_mask, cur_mask_type, p0, bw, p1,
                              bw, bsize, bh, bw);

    // compute rd for mask
    sse = av1_wedge_sse_from_residuals(r1, d10, comp_data->seg_mask, N);
    sse = ROUND_POWER_OF_TWO(sse, bd_round);

    model_rd_from_sse(cpi, xd, bsize, 0, sse, &rate, &dist);
    rd0 = RDCOST(x->rdmult, x->rddiv, rate, dist);

    if (rd0 < best_rd) {
      best_mask_type = cur_mask_type;
      best_rd = rd0;
    }
  }

  // make final mask
  comp_data->mask_type = best_mask_type;
#if CONFIG_AOM_HIGHBITDEPTH
  if (hbd)
    build_compound_seg_mask_highbd(
        comp_data->seg_mask, comp_data->mask_type, CONVERT_TO_BYTEPTR(p0), bw,
        CONVERT_TO_BYTEPTR(p1), bw, bsize, bh, bw, xd->bd);
  else
#endif  // CONFIG_AOM_HIGHBITDEPTH
    build_compound_seg_mask(comp_data->seg_mask, comp_data->mask_type, p0, bw,
                            p1, bw, bsize, bh, bw);

  return best_rd;
}
#endif  // CONFIG_COMPOUND_SEGMENT

static int64_t pick_interintra_wedge(const AV1_COMP *const cpi,
                                     const MACROBLOCK *const x,
                                     const BLOCK_SIZE bsize,
                                     const uint8_t *const p0,
                                     const uint8_t *const p1) {
  const MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;

  int64_t rd;
  int wedge_index = -1;

  assert(is_interintra_wedge_used(bsize));

  rd = pick_wedge_fixed_sign(cpi, x, bsize, p0, p1, 0, &wedge_index);

  mbmi->interintra_wedge_sign = 0;
  mbmi->interintra_wedge_index = wedge_index;
  return rd;
}

static int interinter_compound_motion_search(const AV1_COMP *const cpi,
                                             MACROBLOCK *x,
                                             const BLOCK_SIZE bsize,
                                             const int this_mode, int mi_row,
                                             int mi_col) {
  const MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  int_mv tmp_mv[2];
  int rate_mvs[2], tmp_rate_mv = 0;
  if (this_mode == NEW_NEWMV) {
    int mv_idxs[2] = { 0, 0 };
    do_masked_motion_search_indexed(cpi, x, &mbmi->interinter_compound_data,
                                    bsize, mi_row, mi_col, tmp_mv, rate_mvs,
                                    mv_idxs, 2);
    tmp_rate_mv = rate_mvs[0] + rate_mvs[1];
    mbmi->mv[0].as_int = tmp_mv[0].as_int;
    mbmi->mv[1].as_int = tmp_mv[1].as_int;
  } else if (this_mode == NEW_NEARESTMV || this_mode == NEW_NEARMV) {
    int mv_idxs[2] = { 0, 0 };
    do_masked_motion_search_indexed(cpi, x, &mbmi->interinter_compound_data,
                                    bsize, mi_row, mi_col, tmp_mv, rate_mvs,
                                    mv_idxs, 0);
    tmp_rate_mv = rate_mvs[0];
    mbmi->mv[0].as_int = tmp_mv[0].as_int;
  } else if (this_mode == NEAREST_NEWMV || this_mode == NEAR_NEWMV) {
    int mv_idxs[2] = { 0, 0 };
    do_masked_motion_search_indexed(cpi, x, &mbmi->interinter_compound_data,
                                    bsize, mi_row, mi_col, tmp_mv, rate_mvs,
                                    mv_idxs, 1);
    tmp_rate_mv = rate_mvs[1];
    mbmi->mv[1].as_int = tmp_mv[1].as_int;
  }
  return tmp_rate_mv;
}

#if CONFIG_COMPOUND_SEGMENT
// TODO(sarahparker) this and build_and_cost_compound_wedge can probably
// be combined in a refactor
static int64_t build_and_cost_compound_seg(
    const AV1_COMP *const cpi, MACROBLOCK *x, const int_mv *const cur_mv,
    const BLOCK_SIZE bsize, const int this_mode, int rs2, int rate_mv,
    BUFFER_SET *ctx, int *out_rate_mv, uint8_t **preds0, uint8_t **preds1,
    int *strides, int mi_row, int mi_col) {
  MACROBLOCKD *xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  int rate_sum;
  int64_t dist_sum;
  int64_t best_rd_cur = INT64_MAX;
  int64_t rd = INT64_MAX;
  int tmp_skip_txfm_sb;
  int64_t tmp_skip_sse_sb;

  best_rd_cur = pick_interinter_seg_mask(cpi, x, bsize, *preds0, *preds1);
  best_rd_cur += RDCOST(x->rdmult, x->rddiv, rs2 + rate_mv, 0);

  if (have_newmv_in_inter_mode(this_mode) &&
      use_masked_motion_search(COMPOUND_SEG)) {
    *out_rate_mv = interinter_compound_motion_search(cpi, x, bsize, this_mode,
                                                     mi_row, mi_col);
    av1_build_inter_predictors_sby(xd, mi_row, mi_col, ctx, bsize);
    model_rd_for_sb(cpi, bsize, x, xd, 0, 0, &rate_sum, &dist_sum,
                    &tmp_skip_txfm_sb, &tmp_skip_sse_sb);
    rd = RDCOST(x->rdmult, x->rddiv, rs2 + *out_rate_mv + rate_sum, dist_sum);
    if (rd < best_rd_cur) {
      best_rd_cur = rd;
    } else {
      mbmi->mv[0].as_int = cur_mv[0].as_int;
      mbmi->mv[1].as_int = cur_mv[1].as_int;
      *out_rate_mv = rate_mv;
      av1_build_wedge_inter_predictor_from_buf(xd, bsize, 0, 0,
#if CONFIG_SUPERTX
                                               0, 0,
#endif  // CONFIG_SUPERTX
                                               preds0, strides, preds1,
                                               strides);
    }
    av1_subtract_plane(x, bsize, 0);
    rd = estimate_yrd_for_sb(cpi, bsize, x, &rate_sum, &dist_sum,
                             &tmp_skip_txfm_sb, &tmp_skip_sse_sb, INT64_MAX);
    if (rd != INT64_MAX)
      rd = RDCOST(x->rdmult, x->rddiv, rs2 + *out_rate_mv + rate_sum, dist_sum);
    best_rd_cur = rd;

  } else {
    av1_build_wedge_inter_predictor_from_buf(xd, bsize, 0, 0,
#if CONFIG_SUPERTX
                                             0, 0,
#endif  // CONFIG_SUPERTX
                                             preds0, strides, preds1, strides);
    av1_subtract_plane(x, bsize, 0);
    rd = estimate_yrd_for_sb(cpi, bsize, x, &rate_sum, &dist_sum,
                             &tmp_skip_txfm_sb, &tmp_skip_sse_sb, INT64_MAX);
    if (rd != INT64_MAX)
      rd = RDCOST(x->rdmult, x->rddiv, rs2 + rate_mv + rate_sum, dist_sum);
    best_rd_cur = rd;
  }
  return best_rd_cur;
}
#endif  // CONFIG_COMPOUND_SEGMENT

static int64_t build_and_cost_compound_wedge(
    const AV1_COMP *const cpi, MACROBLOCK *x, const int_mv *const cur_mv,
    const BLOCK_SIZE bsize, const int this_mode, int rs2, int rate_mv,
    BUFFER_SET *ctx, int *out_rate_mv, uint8_t **preds0, uint8_t **preds1,
    int *strides, int mi_row, int mi_col) {
  MACROBLOCKD *xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  int rate_sum;
  int64_t dist_sum;
  int64_t best_rd_cur = INT64_MAX;
  int64_t rd = INT64_MAX;
  int tmp_skip_txfm_sb;
  int64_t tmp_skip_sse_sb;

  best_rd_cur = pick_interinter_wedge(cpi, x, bsize, *preds0, *preds1);
  best_rd_cur += RDCOST(x->rdmult, x->rddiv, rs2 + rate_mv, 0);

  if (have_newmv_in_inter_mode(this_mode) &&
      use_masked_motion_search(COMPOUND_WEDGE)) {
    *out_rate_mv = interinter_compound_motion_search(cpi, x, bsize, this_mode,
                                                     mi_row, mi_col);
    av1_build_inter_predictors_sby(xd, mi_row, mi_col, ctx, bsize);
    model_rd_for_sb(cpi, bsize, x, xd, 0, 0, &rate_sum, &dist_sum,
                    &tmp_skip_txfm_sb, &tmp_skip_sse_sb);
    rd = RDCOST(x->rdmult, x->rddiv, rs2 + *out_rate_mv + rate_sum, dist_sum);
    if (rd >= best_rd_cur) {
      mbmi->mv[0].as_int = cur_mv[0].as_int;
      mbmi->mv[1].as_int = cur_mv[1].as_int;
      *out_rate_mv = rate_mv;
      av1_build_wedge_inter_predictor_from_buf(xd, bsize, 0, 0,
#if CONFIG_SUPERTX
                                               0, 0,
#endif  // CONFIG_SUPERTX
                                               preds0, strides, preds1,
                                               strides);
    }
    av1_subtract_plane(x, bsize, 0);
    rd = estimate_yrd_for_sb(cpi, bsize, x, &rate_sum, &dist_sum,
                             &tmp_skip_txfm_sb, &tmp_skip_sse_sb, INT64_MAX);
    if (rd != INT64_MAX)
      rd = RDCOST(x->rdmult, x->rddiv, rs2 + *out_rate_mv + rate_sum, dist_sum);
    best_rd_cur = rd;

  } else {
    av1_build_wedge_inter_predictor_from_buf(xd, bsize, 0, 0,
#if CONFIG_SUPERTX
                                             0, 0,
#endif  // CONFIG_SUPERTX
                                             preds0, strides, preds1, strides);
    av1_subtract_plane(x, bsize, 0);
    rd = estimate_yrd_for_sb(cpi, bsize, x, &rate_sum, &dist_sum,
                             &tmp_skip_txfm_sb, &tmp_skip_sse_sb, INT64_MAX);
    if (rd != INT64_MAX)
      rd = RDCOST(x->rdmult, x->rddiv, rs2 + rate_mv + rate_sum, dist_sum);
    best_rd_cur = rd;
  }
  return best_rd_cur;
}
#endif  // CONFIG_EXT_INTER

static int64_t handle_inter_mode(
    const AV1_COMP *const cpi, MACROBLOCK *x, BLOCK_SIZE bsize,
    RD_STATS *rd_stats, RD_STATS *rd_stats_y, RD_STATS *rd_stats_uv,
    int *disable_skip, int_mv (*mode_mv)[TOTAL_REFS_PER_FRAME], int mi_row,
    int mi_col,
#if CONFIG_MOTION_VAR
    uint8_t *above_pred_buf[3], int above_pred_stride[3],
    uint8_t *left_pred_buf[3], int left_pred_stride[3],
#endif  // CONFIG_MOTION_VAR
#if CONFIG_EXT_INTER
    int_mv single_newmvs[2][TOTAL_REFS_PER_FRAME],
    int single_newmvs_rate[2][TOTAL_REFS_PER_FRAME],
    int *compmode_interintra_cost, int *compmode_interinter_cost,
    int64_t (*const modelled_rd)[TOTAL_REFS_PER_FRAME],
#else
    int_mv single_newmv[TOTAL_REFS_PER_FRAME],
#endif  // CONFIG_EXT_INTER
    InterpFilter (*single_filter)[TOTAL_REFS_PER_FRAME],
    int (*single_skippable)[TOTAL_REFS_PER_FRAME], const int64_t ref_best_rd) {
  const AV1_COMMON *cm = &cpi->common;
  MACROBLOCKD *xd = &x->e_mbd;
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
  MB_MODE_INFO_EXT *const mbmi_ext = x->mbmi_ext;
  const int is_comp_pred = has_second_ref(mbmi);
  const int this_mode = mbmi->mode;
  int_mv *frame_mv = mode_mv[this_mode];
  int i;
  int refs[2] = { mbmi->ref_frame[0],
                  (mbmi->ref_frame[1] < 0 ? 0 : mbmi->ref_frame[1]) };
  int_mv cur_mv[2];
  int rate_mv = 0;
#if CONFIG_EXT_INTER
  int pred_exists = 1;
  const int bw = block_size_wide[bsize];
  int mv_idx = (this_mode == NEWFROMNEARMV) ? 1 : 0;
  int_mv single_newmv[TOTAL_REFS_PER_FRAME];
  const unsigned int *const interintra_mode_cost =
      cpi->interintra_mode_cost[size_group_lookup[bsize]];
  const int is_comp_interintra_pred = (mbmi->ref_frame[1] == INTRA_FRAME);
#if CONFIG_REF_MV
  uint8_t ref_frame_type = av1_ref_frame_type(mbmi->ref_frame);
#endif
#endif  // CONFIG_EXT_INTER
#if CONFIG_AOM_HIGHBITDEPTH
  DECLARE_ALIGNED(16, uint8_t, tmp_buf_[2 * MAX_MB_PLANE * MAX_SB_SQUARE]);
#else
  DECLARE_ALIGNED(16, uint8_t, tmp_buf_[MAX_MB_PLANE * MAX_SB_SQUARE]);
#endif  // CONFIG_AOM_HIGHBITDEPTH
  uint8_t *tmp_buf;

#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
  MOTION_MODE motion_mode, last_motion_mode_allowed;
  int rate2_nocoeff = 0, best_xskip, best_disable_skip = 0;
  RD_STATS best_rd_stats, best_rd_stats_y, best_rd_stats_uv;
#if CONFIG_VAR_TX
  uint8_t best_blk_skip[MAX_MB_PLANE][MAX_MIB_SIZE * MAX_MIB_SIZE * 4];
#endif  // CONFIG_VAR_TX
  int64_t best_rd = INT64_MAX;
  MB_MODE_INFO base_mbmi, best_mbmi;
#if CONFIG_EXT_INTER
  int rate2_bmc_nocoeff;
  MB_MODE_INFO best_bmc_mbmi;
#if CONFIG_MOTION_VAR
  int rate_mv_bmc;
#endif  // CONFIG_MOTION_VAR
#endif  // CONFIG_EXT_INTER
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
#if CONFIG_WARPED_MOTION
  double pts[SAMPLES_ARRAY_SIZE], pts_inref[SAMPLES_ARRAY_SIZE];
#endif  // CONFIG_WARPED_MOTION
  int64_t rd = INT64_MAX;
  BUFFER_SET orig_dst, tmp_dst;
  int rs = 0;
  InterpFilter assign_filter = SWITCHABLE;

  int skip_txfm_sb = 0;
  int64_t skip_sse_sb = INT64_MAX;
  int16_t mode_ctx;
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
  av1_invalid_rd_stats(&best_rd_stats);
#endif

#if CONFIG_EXT_INTER
  *compmode_interintra_cost = 0;
  mbmi->use_wedge_interintra = 0;
  *compmode_interinter_cost = 0;
  mbmi->interinter_compound_data.type = COMPOUND_AVERAGE;

  // is_comp_interintra_pred implies !is_comp_pred
  assert(!is_comp_interintra_pred || (!is_comp_pred));
  // is_comp_interintra_pred implies is_interintra_allowed(mbmi->sb_type)
  assert(!is_comp_interintra_pred || is_interintra_allowed(mbmi));
#endif  // CONFIG_EXT_INTER

#if CONFIG_REF_MV
#if CONFIG_EXT_INTER
  if (is_comp_pred)
    mode_ctx = mbmi_ext->compound_mode_context[refs[0]];
  else
#endif  // CONFIG_EXT_INTER
    mode_ctx = av1_mode_context_analyzer(mbmi_ext->mode_context,
                                         mbmi->ref_frame, bsize, -1);
#else   // CONFIG_REF_MV
  mode_ctx = mbmi_ext->mode_context[refs[0]];
#endif  // CONFIG_REF_MV

#if CONFIG_AOM_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)
    tmp_buf = CONVERT_TO_BYTEPTR(tmp_buf_);
  else
#endif  // CONFIG_AOM_HIGHBITDEPTH
    tmp_buf = tmp_buf_;
  // Make sure that we didn't leave the plane destination buffers set
  // to tmp_buf at the end of the last iteration
  assert(xd->plane[0].dst.buf != tmp_buf);

#if CONFIG_WARPED_MOTION
  mbmi->num_proj_ref[0] = 0;
  mbmi->num_proj_ref[1] = 0;
#endif  // CONFIG_WARPED_MOTION

  if (is_comp_pred) {
    if (frame_mv[refs[0]].as_int == INVALID_MV ||
        frame_mv[refs[1]].as_int == INVALID_MV)
      return INT64_MAX;
  }

  mbmi->motion_mode = SIMPLE_TRANSLATION;
  if (have_newmv_in_inter_mode(this_mode)) {
    if (is_comp_pred) {
#if CONFIG_EXT_INTER
      for (i = 0; i < 2; ++i) {
        single_newmv[refs[i]].as_int = single_newmvs[mv_idx][refs[i]].as_int;
      }

      if (this_mode == NEW_NEWMV) {
        frame_mv[refs[0]].as_int = single_newmv[refs[0]].as_int;
        frame_mv[refs[1]].as_int = single_newmv[refs[1]].as_int;

        if (cpi->sf.comp_inter_joint_search_thresh <= bsize) {
          joint_motion_search(cpi, x, bsize, frame_mv, mi_row, mi_col, NULL,
                              single_newmv, &rate_mv, 0);
        } else {
#if CONFIG_REF_MV
          av1_set_mvcost(x, mbmi->ref_frame[0], 0, mbmi->ref_mv_idx);
#endif  // CONFIG_REF_MV
          rate_mv = av1_mv_bit_cost(&frame_mv[refs[0]].as_mv,
                                    &mbmi_ext->ref_mvs[refs[0]][0].as_mv,
                                    x->nmvjointcost, x->mvcost, MV_COST_WEIGHT);
#if CONFIG_REF_MV
          av1_set_mvcost(x, mbmi->ref_frame[1], 1, mbmi->ref_mv_idx);
#endif  // CONFIG_REF_MV
          rate_mv += av1_mv_bit_cost(
              &frame_mv[refs[1]].as_mv, &mbmi_ext->ref_mvs[refs[1]][0].as_mv,
              x->nmvjointcost, x->mvcost, MV_COST_WEIGHT);
        }
      } else if (this_mode == NEAREST_NEWMV || this_mode == NEAR_NEWMV) {
        frame_mv[refs[1]].as_int = single_newmv[refs[1]].as_int;
        rate_mv = av1_mv_bit_cost(&frame_mv[refs[1]].as_mv,
                                  &mbmi_ext->ref_mvs[refs[1]][0].as_mv,
                                  x->nmvjointcost, x->mvcost, MV_COST_WEIGHT);
      } else {
        frame_mv[refs[0]].as_int = single_newmv[refs[0]].as_int;
        rate_mv = av1_mv_bit_cost(&frame_mv[refs[0]].as_mv,
                                  &mbmi_ext->ref_mvs[refs[0]][0].as_mv,
                                  x->nmvjointcost, x->mvcost, MV_COST_WEIGHT);
      }
#else
      // Initialize mv using single prediction mode result.
      frame_mv[refs[0]].as_int = single_newmv[refs[0]].as_int;
      frame_mv[refs[1]].as_int = single_newmv[refs[1]].as_int;

      if (cpi->sf.comp_inter_joint_search_thresh <= bsize) {
        joint_motion_search(cpi, x, bsize, frame_mv, mi_row, mi_col,
                            single_newmv, &rate_mv, 0);
      } else {
#if CONFIG_REF_MV
        av1_set_mvcost(x, mbmi->ref_frame[0], 0, mbmi->ref_mv_idx);
#endif  // CONFIG_REF_MV
        rate_mv = av1_mv_bit_cost(&frame_mv[refs[0]].as_mv,
                                  &mbmi_ext->ref_mvs[refs[0]][0].as_mv,
                                  x->nmvjointcost, x->mvcost, MV_COST_WEIGHT);
#if CONFIG_REF_MV
        av1_set_mvcost(x, mbmi->ref_frame[1], 1, mbmi->ref_mv_idx);
#endif  // CONFIG_REF_MV
        rate_mv += av1_mv_bit_cost(&frame_mv[refs[1]].as_mv,
                                   &mbmi_ext->ref_mvs[refs[1]][0].as_mv,
                                   x->nmvjointcost, x->mvcost, MV_COST_WEIGHT);
      }
#endif  // CONFIG_EXT_INTER
    } else {
#if CONFIG_EXT_INTER
      if (is_comp_interintra_pred) {
        x->best_mv = single_newmvs[mv_idx][refs[0]];
        rate_mv = single_newmvs_rate[mv_idx][refs[0]];
      } else {
        single_motion_search(cpi, x, bsize, mi_row, mi_col, 0, mv_idx,
                             &rate_mv);
        single_newmvs[mv_idx][refs[0]] = x->best_mv;
        single_newmvs_rate[mv_idx][refs[0]] = rate_mv;
      }
#else
      single_motion_search(cpi, x, bsize, mi_row, mi_col, &rate_mv);
      single_newmv[refs[0]] = x->best_mv;
#endif  // CONFIG_EXT_INTER

      if (x->best_mv.as_int == INVALID_MV) return INT64_MAX;

      frame_mv[refs[0]] = x->best_mv;
      xd->mi[0]->bmi[0].as_mv[0] = x->best_mv;

      // Estimate the rate implications of a new mv but discount this
      // under certain circumstances where we want to help initiate a weak
      // motion field, where the distortion gain for a single block may not
      // be enough to overcome the cost of a new mv.
      if (discount_newmv_test(cpi, this_mode, x->best_mv, mode_mv, refs[0])) {
        rate_mv = AOMMAX((rate_mv / NEW_MV_DISCOUNT_FACTOR), 1);
      }
    }
    rd_stats->rate += rate_mv;
  }

  for (i = 0; i < is_comp_pred + 1; ++i) {
    cur_mv[i] = frame_mv[refs[i]];
// Clip "next_nearest" so that it does not extend to far out of image
#if CONFIG_EXT_INTER
    if (this_mode != NEWMV && this_mode != NEWFROMNEARMV)
#else
    if (this_mode != NEWMV)
#endif  // CONFIG_EXT_INTER
      clamp_mv2(&cur_mv[i].as_mv, xd);

    if (mv_check_bounds(x, &cur_mv[i].as_mv)) return INT64_MAX;
    mbmi->mv[i].as_int = cur_mv[i].as_int;
  }

#if CONFIG_REF_MV
#if CONFIG_EXT_INTER
  if (this_mode == NEAREST_NEARESTMV)
#else
  if (this_mode == NEARESTMV && is_comp_pred)
#endif  // CONFIG_EXT_INTER
  {
#if !CONFIG_EXT_INTER
    uint8_t ref_frame_type = av1_ref_frame_type(mbmi->ref_frame);
#endif
    if (mbmi_ext->ref_mv_count[ref_frame_type] > 0) {
      cur_mv[0] = mbmi_ext->ref_mv_stack[ref_frame_type][0].this_mv;
      cur_mv[1] = mbmi_ext->ref_mv_stack[ref_frame_type][0].comp_mv;

      for (i = 0; i < 2; ++i) {
        clamp_mv2(&cur_mv[i].as_mv, xd);
        if (mv_check_bounds(x, &cur_mv[i].as_mv)) return INT64_MAX;
        mbmi->mv[i].as_int = cur_mv[i].as_int;
      }
    }
  }

#if CONFIG_EXT_INTER
  if (mbmi_ext->ref_mv_count[ref_frame_type] > 0) {
    if (this_mode == NEAREST_NEWMV || this_mode == NEAREST_NEARMV) {
      cur_mv[0] = mbmi_ext->ref_mv_stack[ref_frame_type][0].this_mv;

      lower_mv_precision(&cur_mv[0].as_mv, cm->allow_high_precision_mv);
      clamp_mv2(&cur_mv[0].as_mv, xd);
      if (mv_check_bounds(x, &cur_mv[0].as_mv)) return INT64_MAX;
      mbmi->mv[0].as_int = cur_mv[0].as_int;
    }

    if (this_mode == NEW_NEARESTMV || this_mode == NEAR_NEARESTMV) {
      cur_mv[1] = mbmi_ext->ref_mv_stack[ref_frame_type][0].comp_mv;

      lower_mv_precision(&cur_mv[1].as_mv, cm->allow_high_precision_mv);
      clamp_mv2(&cur_mv[1].as_mv, xd);
      if (mv_check_bounds(x, &cur_mv[1].as_mv)) return INT64_MAX;
      mbmi->mv[1].as_int = cur_mv[1].as_int;
    }
  }

  if (mbmi_ext->ref_mv_count[ref_frame_type] > 1) {
    if (this_mode == NEAR_NEWMV || this_mode == NEAR_NEARESTMV ||
        this_mode == NEAR_NEARMV) {
      cur_mv[0] = mbmi_ext->ref_mv_stack[ref_frame_type][1].this_mv;

      lower_mv_precision(&cur_mv[0].as_mv, cm->allow_high_precision_mv);
      clamp_mv2(&cur_mv[0].as_mv, xd);
      if (mv_check_bounds(x, &cur_mv[0].as_mv)) return INT64_MAX;
      mbmi->mv[0].as_int = cur_mv[0].as_int;
    }

    if (this_mode == NEW_NEARMV || this_mode == NEAREST_NEARMV ||
        this_mode == NEAR_NEARMV) {
      cur_mv[1] = mbmi_ext->ref_mv_stack[ref_frame_type][1].comp_mv;

      lower_mv_precision(&cur_mv[1].as_mv, cm->allow_high_precision_mv);
      clamp_mv2(&cur_mv[1].as_mv, xd);
      if (mv_check_bounds(x, &cur_mv[1].as_mv)) return INT64_MAX;
      mbmi->mv[1].as_int = cur_mv[1].as_int;
    }
  }
#else
  if (this_mode == NEARMV && is_comp_pred) {
    uint8_t ref_frame_type = av1_ref_frame_type(mbmi->ref_frame);
    if (mbmi_ext->ref_mv_count[ref_frame_type] > 1) {
      int ref_mv_idx = mbmi->ref_mv_idx + 1;
      cur_mv[0] = mbmi_ext->ref_mv_stack[ref_frame_type][ref_mv_idx].this_mv;
      cur_mv[1] = mbmi_ext->ref_mv_stack[ref_frame_type][ref_mv_idx].comp_mv;

      for (i = 0; i < 2; ++i) {
        clamp_mv2(&cur_mv[i].as_mv, xd);
        if (mv_check_bounds(x, &cur_mv[i].as_mv)) return INT64_MAX;
        mbmi->mv[i].as_int = cur_mv[i].as_int;
      }
    }
  }
#endif  // CONFIG_EXT_INTER
#endif  // CONFIG_REF_MV

  // do first prediction into the destination buffer. Do the next
  // prediction into a temporary buffer. Then keep track of which one
  // of these currently holds the best predictor, and use the other
  // one for future predictions. In the end, copy from tmp_buf to
  // dst if necessary.
  for (i = 0; i < MAX_MB_PLANE; i++) {
    tmp_dst.plane[i] = tmp_buf + i * MAX_SB_SQUARE;
    tmp_dst.stride[i] = MAX_SB_SIZE;
  }
  for (i = 0; i < MAX_MB_PLANE; i++) {
    orig_dst.plane[i] = xd->plane[i].dst.buf;
    orig_dst.stride[i] = xd->plane[i].dst.stride;
  }

  // We don't include the cost of the second reference here, because there
  // are only three options: Last/Golden, ARF/Last or Golden/ARF, or in other
  // words if you present them in that order, the second one is always known
  // if the first is known.
  //
  // Under some circumstances we discount the cost of new mv mode to encourage
  // initiation of a motion field.
  if (discount_newmv_test(cpi, this_mode, frame_mv[refs[0]], mode_mv,
                          refs[0])) {
#if CONFIG_REF_MV && CONFIG_EXT_INTER
    rd_stats->rate +=
        AOMMIN(cost_mv_ref(cpi, this_mode, is_comp_pred, mode_ctx),
               cost_mv_ref(cpi, NEARESTMV, is_comp_pred, mode_ctx));
#else
    rd_stats->rate += AOMMIN(cost_mv_ref(cpi, this_mode, mode_ctx),
                             cost_mv_ref(cpi, NEARESTMV, mode_ctx));
#endif  // CONFIG_REF_MV && CONFIG_EXT_INTER
  } else {
#if CONFIG_REF_MV && CONFIG_EXT_INTER
    rd_stats->rate += cost_mv_ref(cpi, this_mode, is_comp_pred, mode_ctx);
#else
    rd_stats->rate += cost_mv_ref(cpi, this_mode, mode_ctx);
#endif  // CONFIG_REF_MV && CONFIG_EXT_INTER
  }

  if (RDCOST(x->rdmult, x->rddiv, rd_stats->rate, 0) > ref_best_rd &&
#if CONFIG_EXT_INTER
      mbmi->mode != NEARESTMV && mbmi->mode != NEAREST_NEARESTMV
#else
      mbmi->mode != NEARESTMV
#endif  // CONFIG_EXT_INTER
      )
    return INT64_MAX;

  if (cm->interp_filter == SWITCHABLE) {
#if CONFIG_DUAL_FILTER
    if (!av1_is_interp_needed(xd)) assign_filter = EIGHTTAP_REGULAR;
#else
    assign_filter =
        predict_interp_filter(cpi, x, bsize, mi_row, mi_col, single_filter);
#endif
  } else {
    assign_filter = cm->interp_filter;
  }

  {  // Do interpolation filter search in the parentheses
    int tmp_rate;
    int64_t tmp_dist;
#if CONFIG_DUAL_FILTER
    mbmi->interp_filter[0] =
        assign_filter == SWITCHABLE ? EIGHTTAP_REGULAR : assign_filter;
    mbmi->interp_filter[1] =
        assign_filter == SWITCHABLE ? EIGHTTAP_REGULAR : assign_filter;
    mbmi->interp_filter[2] =
        assign_filter == SWITCHABLE ? EIGHTTAP_REGULAR : assign_filter;
    mbmi->interp_filter[3] =
        assign_filter == SWITCHABLE ? EIGHTTAP_REGULAR : assign_filter;
#else
    mbmi->interp_filter =
        assign_filter == SWITCHABLE ? EIGHTTAP_REGULAR : assign_filter;
#endif
    rs = av1_get_switchable_rate(cpi, xd);
    av1_build_inter_predictors_sb(xd, mi_row, mi_col, &orig_dst, bsize);
    model_rd_for_sb(cpi, bsize, x, xd, 0, MAX_MB_PLANE - 1, &tmp_rate,
                    &tmp_dist, &skip_txfm_sb, &skip_sse_sb);
    rd = RDCOST(x->rdmult, x->rddiv, rs + tmp_rate, tmp_dist);

    if (assign_filter == SWITCHABLE) {
      // do interp_filter search
      if (av1_is_interp_needed(xd)) {
#if CONFIG_DUAL_FILTER
        const int filter_set_size = DUAL_FILTER_SET_SIZE;
#else
        const int filter_set_size = SWITCHABLE_FILTERS;
#endif
        int best_in_temp = 0;
#if CONFIG_DUAL_FILTER
        InterpFilter best_filter[4];
        av1_copy(best_filter, mbmi->interp_filter);
#else
        InterpFilter best_filter = mbmi->interp_filter;
#endif
        restore_dst_buf(xd, tmp_dst);
        // EIGHTTAP_REGULAR mode is calculated beforehand
        for (i = 1; i < filter_set_size; ++i) {
          int tmp_skip_sb = 0;
          int64_t tmp_skip_sse = INT64_MAX;
          int tmp_rs;
          int64_t tmp_rd;
#if CONFIG_DUAL_FILTER
          mbmi->interp_filter[0] = filter_sets[i][0];
          mbmi->interp_filter[1] = filter_sets[i][1];
          mbmi->interp_filter[2] = filter_sets[i][0];
          mbmi->interp_filter[3] = filter_sets[i][1];
#else
          mbmi->interp_filter = i;
#endif
          tmp_rs = av1_get_switchable_rate(cpi, xd);
          av1_build_inter_predictors_sb(xd, mi_row, mi_col, &orig_dst, bsize);
          model_rd_for_sb(cpi, bsize, x, xd, 0, MAX_MB_PLANE - 1, &tmp_rate,
                          &tmp_dist, &tmp_skip_sb, &tmp_skip_sse);
          tmp_rd = RDCOST(x->rdmult, x->rddiv, tmp_rs + tmp_rate, tmp_dist);

          if (tmp_rd < rd) {
            rd = tmp_rd;
            rs = av1_get_switchable_rate(cpi, xd);
#if CONFIG_DUAL_FILTER
            av1_copy(best_filter, mbmi->interp_filter);
#else
            best_filter = mbmi->interp_filter;
#endif
            skip_txfm_sb = tmp_skip_sb;
            skip_sse_sb = tmp_skip_sse;
            best_in_temp = !best_in_temp;
            if (best_in_temp) {
              restore_dst_buf(xd, orig_dst);
            } else {
              restore_dst_buf(xd, tmp_dst);
            }
          }
        }
        if (best_in_temp) {
          restore_dst_buf(xd, tmp_dst);
        } else {
          restore_dst_buf(xd, orig_dst);
        }
#if CONFIG_DUAL_FILTER
        av1_copy(mbmi->interp_filter, best_filter);
#else
        mbmi->interp_filter = best_filter;
#endif
      } else {
#if !CONFIG_DUAL_FILTER
        int tmp_rs;
        InterpFilter best_filter = mbmi->interp_filter;
        rs = av1_get_switchable_rate(cpi, xd);
        for (i = 1; i < SWITCHABLE_FILTERS; ++i) {
          mbmi->interp_filter = i;
          tmp_rs = av1_get_switchable_rate(cpi, xd);
          if (tmp_rs < rs) {
            rs = tmp_rs;
            best_filter = i;
          }
        }
        mbmi->interp_filter = best_filter;
#else
        assert(0);
#endif
      }
    }
  }

#if CONFIG_EXT_INTER
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
  best_bmc_mbmi = *mbmi;
  rate2_bmc_nocoeff = rd_stats->rate;
  if (cm->interp_filter == SWITCHABLE) rate2_bmc_nocoeff += rs;
#if CONFIG_MOTION_VAR
  rate_mv_bmc = rate_mv;
#endif  // CONFIG_MOTION_VAR
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION

  if (is_comp_pred) {
    int rate_sum, rs2;
    int64_t dist_sum;
    int64_t best_rd_compound = INT64_MAX, best_rd_cur = INT64_MAX;
    INTERINTER_COMPOUND_DATA best_compound_data;
    int_mv best_mv[2];
    int best_tmp_rate_mv = rate_mv;
    int tmp_skip_txfm_sb;
    int64_t tmp_skip_sse_sb;
    int compound_type_cost[COMPOUND_TYPES];
    uint8_t pred0[2 * MAX_SB_SQUARE];
    uint8_t pred1[2 * MAX_SB_SQUARE];
    uint8_t *preds0[1] = { pred0 };
    uint8_t *preds1[1] = { pred1 };
    int strides[1] = { bw };
    int tmp_rate_mv;
    int masked_compound_used = is_any_masked_compound_used(bsize);
    COMPOUND_TYPE cur_type;

    best_mv[0].as_int = cur_mv[0].as_int;
    best_mv[1].as_int = cur_mv[1].as_int;
    memset(&best_compound_data, 0, sizeof(INTERINTER_COMPOUND_DATA));
    av1_cost_tokens(compound_type_cost, cm->fc->compound_type_prob[bsize],
                    av1_compound_type_tree);

    if (masked_compound_used) {
      // get inter predictors to use for masked compound modes
      av1_build_inter_predictors_for_planes_single_buf(
          xd, bsize, 0, 0, mi_row, mi_col, 0, preds0, strides);
      av1_build_inter_predictors_for_planes_single_buf(
          xd, bsize, 0, 0, mi_row, mi_col, 1, preds1, strides);
    }

    for (cur_type = COMPOUND_AVERAGE; cur_type < COMPOUND_TYPES; cur_type++) {
      if (!is_interinter_compound_used(cur_type, bsize)) break;
      tmp_rate_mv = rate_mv;
      best_rd_cur = INT64_MAX;
      mbmi->interinter_compound_data.type = cur_type;
      rs2 = av1_cost_literal(get_interinter_compound_type_bits(
                bsize, mbmi->interinter_compound_data.type)) +
            (masked_compound_used
                 ? compound_type_cost[mbmi->interinter_compound_data.type]
                 : 0);

      switch (cur_type) {
        case COMPOUND_AVERAGE:
          av1_build_inter_predictors_sby(xd, mi_row, mi_col, &orig_dst, bsize);
          av1_subtract_plane(x, bsize, 0);
          rd = estimate_yrd_for_sb(cpi, bsize, x, &rate_sum, &dist_sum,
                                   &tmp_skip_txfm_sb, &tmp_skip_sse_sb,
                                   INT64_MAX);
          if (rd != INT64_MAX)
            best_rd_cur =
                RDCOST(x->rdmult, x->rddiv, rs2 + rate_mv + rate_sum, dist_sum);
          best_rd_compound = best_rd_cur;
          break;
        case COMPOUND_WEDGE:
          if (x->source_variance > cpi->sf.disable_wedge_search_var_thresh &&
              best_rd_compound / 3 < ref_best_rd) {
            best_rd_cur = build_and_cost_compound_wedge(
                cpi, x, cur_mv, bsize, this_mode, rs2, rate_mv, &orig_dst,
                &tmp_rate_mv, preds0, preds1, strides, mi_row, mi_col);
          }
          break;
#if CONFIG_COMPOUND_SEGMENT
        case COMPOUND_SEG:
          if (x->source_variance > cpi->sf.disable_wedge_search_var_thresh &&
              best_rd_compound / 3 < ref_best_rd) {
            best_rd_cur = build_and_cost_compound_seg(
                cpi, x, cur_mv, bsize, this_mode, rs2, rate_mv, &orig_dst,
                &tmp_rate_mv, preds0, preds1, strides, mi_row, mi_col);
          }
          break;
#endif  // CONFIG_COMPOUND_SEGMENT
        default: assert(0); return 0;
      }

      if (best_rd_cur < best_rd_compound) {
        best_rd_compound = best_rd_cur;
        memcpy(&best_compound_data, &mbmi->interinter_compound_data,
               sizeof(best_compound_data));
        if (have_newmv_in_inter_mode(this_mode)) {
          if (use_masked_motion_search(cur_type)) {
            best_tmp_rate_mv = tmp_rate_mv;
            best_mv[0].as_int = mbmi->mv[0].as_int;
            best_mv[1].as_int = mbmi->mv[1].as_int;
          } else {
            best_mv[0].as_int = cur_mv[0].as_int;
            best_mv[1].as_int = cur_mv[1].as_int;
          }
        }
      }
      // reset to original mvs for next iteration
      mbmi->mv[0].as_int = cur_mv[0].as_int;
      mbmi->mv[1].as_int = cur_mv[1].as_int;
    }
    memcpy(&mbmi->interinter_compound_data, &best_compound_data,
           sizeof(INTERINTER_COMPOUND_DATA));
    if (have_newmv_in_inter_mode(this_mode)) {
      mbmi->mv[0].as_int = best_mv[0].as_int;
      mbmi->mv[1].as_int = best_mv[1].as_int;
      xd->mi[0]->bmi[0].as_mv[0].as_int = mbmi->mv[0].as_int;
      xd->mi[0]->bmi[0].as_mv[1].as_int = mbmi->mv[1].as_int;
      if (use_masked_motion_search(mbmi->interinter_compound_data.type)) {
        rd_stats->rate += best_tmp_rate_mv - rate_mv;
        rate_mv = best_tmp_rate_mv;
      }
    }

    if (ref_best_rd < INT64_MAX && best_rd_compound / 3 > ref_best_rd) {
      restore_dst_buf(xd, orig_dst);
      return INT64_MAX;
    }

    pred_exists = 0;

    *compmode_interinter_cost =
        compound_type_cost[mbmi->interinter_compound_data.type] +
        av1_cost_literal(get_interinter_compound_type_bits(
            bsize, mbmi->interinter_compound_data.type));
  }

  if (is_comp_interintra_pred) {
    INTERINTRA_MODE best_interintra_mode = II_DC_PRED;
    int64_t best_interintra_rd = INT64_MAX;
    int rmode, rate_sum;
    int64_t dist_sum;
    int j;
    int64_t best_interintra_rd_nowedge = INT64_MAX;
    int64_t best_interintra_rd_wedge = INT64_MAX;
    int rwedge;
    int_mv tmp_mv;
    int tmp_rate_mv = 0;
    int tmp_skip_txfm_sb;
    int64_t tmp_skip_sse_sb;
    DECLARE_ALIGNED(16, uint8_t, intrapred_[2 * MAX_SB_SQUARE]);
    uint8_t *intrapred;

#if CONFIG_AOM_HIGHBITDEPTH
    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)
      intrapred = CONVERT_TO_BYTEPTR(intrapred_);
    else
#endif  // CONFIG_AOM_HIGHBITDEPTH
      intrapred = intrapred_;

    mbmi->ref_frame[1] = NONE_FRAME;
    for (j = 0; j < MAX_MB_PLANE; j++) {
      xd->plane[j].dst.buf = tmp_buf + j * MAX_SB_SQUARE;
      xd->plane[j].dst.stride = bw;
    }
    av1_build_inter_predictors_sby(xd, mi_row, mi_col, &orig_dst, bsize);
    restore_dst_buf(xd, orig_dst);
    mbmi->ref_frame[1] = INTRA_FRAME;
    mbmi->use_wedge_interintra = 0;

    for (j = 0; j < INTERINTRA_MODES; ++j) {
      mbmi->interintra_mode = (INTERINTRA_MODE)j;
      rmode = interintra_mode_cost[mbmi->interintra_mode];
      av1_build_intra_predictors_for_interintra(xd, bsize, 0, &orig_dst,
                                                intrapred, bw);
      av1_combine_interintra(xd, bsize, 0, tmp_buf, bw, intrapred, bw);
      model_rd_for_sb(cpi, bsize, x, xd, 0, 0, &rate_sum, &dist_sum,
                      &tmp_skip_txfm_sb, &tmp_skip_sse_sb);
      rd = RDCOST(x->rdmult, x->rddiv, rs + tmp_rate_mv + rate_sum, dist_sum);
      if (rd < best_interintra_rd) {
        best_interintra_rd = rd;
        best_interintra_mode = mbmi->interintra_mode;
      }
    }
    mbmi->interintra_mode = best_interintra_mode;
    rmode = interintra_mode_cost[mbmi->interintra_mode];
    av1_build_intra_predictors_for_interintra(xd, bsize, 0, &orig_dst,
                                              intrapred, bw);
    av1_combine_interintra(xd, bsize, 0, tmp_buf, bw, intrapred, bw);
    av1_subtract_plane(x, bsize, 0);
    rd = estimate_yrd_for_sb(cpi, bsize, x, &rate_sum, &dist_sum,
                             &tmp_skip_txfm_sb, &tmp_skip_sse_sb, INT64_MAX);
    if (rd != INT64_MAX)
      rd = RDCOST(x->rdmult, x->rddiv, rate_mv + rmode + rate_sum, dist_sum);
    best_interintra_rd = rd;

    if (ref_best_rd < INT64_MAX && best_interintra_rd > 2 * ref_best_rd) {
      // Don't need to call restore_dst_buf here
      return INT64_MAX;
    }
    if (is_interintra_wedge_used(bsize)) {
      rwedge = av1_cost_bit(cm->fc->wedge_interintra_prob[bsize], 0);
      if (rd != INT64_MAX)
        rd = RDCOST(x->rdmult, x->rddiv, rmode + rate_mv + rwedge + rate_sum,
                    dist_sum);
      best_interintra_rd_nowedge = rd;

      // Disbale wedge search if source variance is small
      if (x->source_variance > cpi->sf.disable_wedge_search_var_thresh) {
        mbmi->use_wedge_interintra = 1;

        rwedge = av1_cost_literal(get_interintra_wedge_bits(bsize)) +
                 av1_cost_bit(cm->fc->wedge_interintra_prob[bsize], 1);

        best_interintra_rd_wedge =
            pick_interintra_wedge(cpi, x, bsize, intrapred_, tmp_buf_);

        best_interintra_rd_wedge +=
            RDCOST(x->rdmult, x->rddiv, rmode + rate_mv + rwedge, 0);
        // Refine motion vector.
        if (have_newmv_in_inter_mode(this_mode)) {
          // get negative of mask
          const uint8_t *mask = av1_get_contiguous_soft_mask(
              mbmi->interintra_wedge_index, 1, bsize);
          do_masked_motion_search(cpi, x, mask, bw, bsize, mi_row, mi_col,
                                  &tmp_mv, &tmp_rate_mv, 0, mv_idx);
          mbmi->mv[0].as_int = tmp_mv.as_int;
          av1_build_inter_predictors_sby(xd, mi_row, mi_col, &orig_dst, bsize);
          model_rd_for_sb(cpi, bsize, x, xd, 0, 0, &rate_sum, &dist_sum,
                          &tmp_skip_txfm_sb, &tmp_skip_sse_sb);
          rd = RDCOST(x->rdmult, x->rddiv,
                      rmode + tmp_rate_mv + rwedge + rate_sum, dist_sum);
          if (rd < best_interintra_rd_wedge) {
            best_interintra_rd_wedge = rd;
          } else {
            tmp_mv.as_int = cur_mv[0].as_int;
            tmp_rate_mv = rate_mv;
          }
        } else {
          tmp_mv.as_int = cur_mv[0].as_int;
          tmp_rate_mv = rate_mv;
          av1_combine_interintra(xd, bsize, 0, tmp_buf, bw, intrapred, bw);
        }
        // Evaluate closer to true rd
        av1_subtract_plane(x, bsize, 0);
        rd =
            estimate_yrd_for_sb(cpi, bsize, x, &rate_sum, &dist_sum,
                                &tmp_skip_txfm_sb, &tmp_skip_sse_sb, INT64_MAX);
        if (rd != INT64_MAX)
          rd = RDCOST(x->rdmult, x->rddiv,
                      rmode + tmp_rate_mv + rwedge + rate_sum, dist_sum);
        best_interintra_rd_wedge = rd;
        if (best_interintra_rd_wedge < best_interintra_rd_nowedge) {
          mbmi->use_wedge_interintra = 1;
          best_interintra_rd = best_interintra_rd_wedge;
          mbmi->mv[0].as_int = tmp_mv.as_int;
          rd_stats->rate += tmp_rate_mv - rate_mv;
          rate_mv = tmp_rate_mv;
        } else {
          mbmi->use_wedge_interintra = 0;
          best_interintra_rd = best_interintra_rd_nowedge;
          mbmi->mv[0].as_int = cur_mv[0].as_int;
        }
      } else {
        mbmi->use_wedge_interintra = 0;
        best_interintra_rd = best_interintra_rd_nowedge;
      }
    }

    pred_exists = 0;
    *compmode_interintra_cost =
        av1_cost_bit(cm->fc->interintra_prob[size_group_lookup[bsize]], 1);
    *compmode_interintra_cost += interintra_mode_cost[mbmi->interintra_mode];
    if (is_interintra_wedge_used(bsize)) {
      *compmode_interintra_cost += av1_cost_bit(
          cm->fc->wedge_interintra_prob[bsize], mbmi->use_wedge_interintra);
      if (mbmi->use_wedge_interintra) {
        *compmode_interintra_cost +=
            av1_cost_literal(get_interintra_wedge_bits(bsize));
      }
    }
  } else if (is_interintra_allowed(mbmi)) {
    *compmode_interintra_cost =
        av1_cost_bit(cm->fc->interintra_prob[size_group_lookup[bsize]], 0);
  }

#if CONFIG_DUAL_FILTER
  if (!av1_is_interp_needed(xd) && cm->interp_filter == SWITCHABLE) {
    for (i = 0; i < 4; ++i) mbmi->interp_filter[i] = EIGHTTAP_REGULAR;
    pred_exists = 0;
  }
#endif  // CONFIG_DUAL_FILTER
  if (pred_exists == 0) {
    int tmp_rate;
    int64_t tmp_dist;
    av1_build_inter_predictors_sb(xd, mi_row, mi_col, &orig_dst, bsize);
    model_rd_for_sb(cpi, bsize, x, xd, 0, MAX_MB_PLANE - 1, &tmp_rate,
                    &tmp_dist, &skip_txfm_sb, &skip_sse_sb);
    rd = RDCOST(x->rdmult, x->rddiv, rs + tmp_rate, tmp_dist);
  }
#endif  // CONFIG_EXT_INTER

#if CONFIG_DUAL_FILTER
  if (!is_comp_pred) single_filter[this_mode][refs[0]] = mbmi->interp_filter[0];
#else
  if (!is_comp_pred) single_filter[this_mode][refs[0]] = mbmi->interp_filter;
#endif

#if CONFIG_EXT_INTER
  if (modelled_rd != NULL) {
    if (is_comp_pred) {
      const int mode0 = compound_ref0_mode(this_mode);
      const int mode1 = compound_ref1_mode(this_mode);
      int64_t mrd =
          AOMMIN(modelled_rd[mode0][refs[0]], modelled_rd[mode1][refs[1]]);
      if (rd / 4 * 3 > mrd && ref_best_rd < INT64_MAX) {
        restore_dst_buf(xd, orig_dst);
        return INT64_MAX;
      }
    } else if (!is_comp_interintra_pred) {
      modelled_rd[this_mode][refs[0]] = rd;
    }
  }
#endif  // CONFIG_EXT_INTER

  if (cpi->sf.use_rd_breakout && ref_best_rd < INT64_MAX) {
    // if current pred_error modeled rd is substantially more than the best
    // so far, do not bother doing full rd
    if (rd / 2 > ref_best_rd) {
      restore_dst_buf(xd, orig_dst);
      return INT64_MAX;
    }
  }

  if (cm->interp_filter == SWITCHABLE) rd_stats->rate += rs;
#if CONFIG_WARPED_MOTION
  aom_clear_system_state();
  mbmi->num_proj_ref[0] = findSamples(cm, xd, mi_row, mi_col, pts, pts_inref);
#if CONFIG_EXT_INTER
  best_bmc_mbmi.num_proj_ref[0] = mbmi->num_proj_ref[0];
#endif  // CONFIG_EXT_INTER
#endif  // CONFIG_WARPED_MOTION
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
  rate2_nocoeff = rd_stats->rate;
  last_motion_mode_allowed = motion_mode_allowed(mbmi);
  base_mbmi = *mbmi;
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION

#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
  best_rd = INT64_MAX;
  for (motion_mode = SIMPLE_TRANSLATION;
       motion_mode <= last_motion_mode_allowed; motion_mode++) {
    int64_t tmp_rd = INT64_MAX;
    int tmp_rate;
    int64_t tmp_dist;
#if CONFIG_EXT_INTER
    int tmp_rate2 =
        motion_mode != SIMPLE_TRANSLATION ? rate2_bmc_nocoeff : rate2_nocoeff;
#else
    int tmp_rate2 = rate2_nocoeff;
#endif  // CONFIG_EXT_INTER

    *mbmi = base_mbmi;
    mbmi->motion_mode = motion_mode;
#if CONFIG_MOTION_VAR
    if (mbmi->motion_mode == OBMC_CAUSAL) {
#if CONFIG_EXT_INTER
      *mbmi = best_bmc_mbmi;
      mbmi->motion_mode = OBMC_CAUSAL;
#endif  // CONFIG_EXT_INTER
      if (!is_comp_pred && have_newmv_in_inter_mode(this_mode)) {
        int tmp_rate_mv = 0;

        single_motion_search(cpi, x, bsize, mi_row, mi_col,
#if CONFIG_EXT_INTER
                             0, mv_idx,
#endif  // CONFIG_EXT_INTER
                             &tmp_rate_mv);
        mbmi->mv[0].as_int = x->best_mv.as_int;
        if (discount_newmv_test(cpi, this_mode, mbmi->mv[0], mode_mv,
                                refs[0])) {
          tmp_rate_mv = AOMMAX((tmp_rate_mv / NEW_MV_DISCOUNT_FACTOR), 1);
        }
#if CONFIG_EXT_INTER
        tmp_rate2 = rate2_bmc_nocoeff - rate_mv_bmc + tmp_rate_mv;
#else
        tmp_rate2 = rate2_nocoeff - rate_mv + tmp_rate_mv;
#endif  // CONFIG_EXT_INTER
#if CONFIG_DUAL_FILTER
        if (!has_subpel_mv_component(xd->mi[0], xd, 0))
          mbmi->interp_filter[0] = EIGHTTAP_REGULAR;
        if (!has_subpel_mv_component(xd->mi[0], xd, 1))
          mbmi->interp_filter[1] = EIGHTTAP_REGULAR;
        // This is not quite correct with CONFIG_DUAL_FILTER when a filter
        // is needed in only one direction
        if (!av1_is_interp_needed(xd)) tmp_rate2 -= rs;
#endif  // CONFIG_DUAL_FILTER
        av1_build_inter_predictors_sb(xd, mi_row, mi_col, &orig_dst, bsize);
#if CONFIG_EXT_INTER
      } else {
        av1_build_inter_predictors_sb(xd, mi_row, mi_col, &orig_dst, bsize);
#endif  // CONFIG_EXT_INTER
      }
      av1_build_obmc_inter_prediction(cm, xd, mi_row, mi_col, above_pred_buf,
                                      above_pred_stride, left_pred_buf,
                                      left_pred_stride);
      model_rd_for_sb(cpi, bsize, x, xd, 0, MAX_MB_PLANE - 1, &tmp_rate,
                      &tmp_dist, &skip_txfm_sb, &skip_sse_sb);
    }
#endif  // CONFIG_MOTION_VAR

#if CONFIG_WARPED_MOTION
    if (mbmi->motion_mode == WARPED_CAUSAL) {
#if CONFIG_EXT_INTER
      *mbmi = best_bmc_mbmi;
      mbmi->motion_mode = WARPED_CAUSAL;
#endif  // CONFIG_EXT_INTER
      mbmi->wm_params[0].wmtype = DEFAULT_WMTYPE;
#if CONFIG_DUAL_FILTER
      mbmi->interp_filter[0] = cm->interp_filter == SWITCHABLE
                                   ? EIGHTTAP_REGULAR
                                   : cm->interp_filter;
      mbmi->interp_filter[1] = cm->interp_filter == SWITCHABLE
                                   ? EIGHTTAP_REGULAR
                                   : cm->interp_filter;
#else
      mbmi->interp_filter = cm->interp_filter == SWITCHABLE ? EIGHTTAP_REGULAR
                                                            : cm->interp_filter;
#endif  // CONFIG_DUAL_FILTER

      if (find_projection(mbmi->num_proj_ref[0], pts, pts_inref,
                          &mbmi->wm_params[0]) == 0) {
        int plane;
#if CONFIG_AOM_HIGHBITDEPTH
        int use_hbd = xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH;
#endif  // CONFIG_AOM_HIGHBITDEPTH

        for (plane = 0; plane < 3; ++plane) {
          const struct macroblockd_plane *pd = &xd->plane[plane];

          av1_warp_plane(&mbmi->wm_params[0],
#if CONFIG_AOM_HIGHBITDEPTH
                         xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH, xd->bd,
#endif  // CONFIG_AOM_HIGHBITDEPTH
                         pd->pre[0].buf0, pd->pre[0].width, pd->pre[0].height,
                         pd->pre[0].stride, pd->dst.buf,
                         (mi_col * MI_SIZE) >> pd->subsampling_x,
                         (mi_row * MI_SIZE) >> pd->subsampling_y,
                         (xd->n8_w * MI_SIZE) >> pd->subsampling_x,
                         (xd->n8_h * MI_SIZE) >> pd->subsampling_y,
                         pd->dst.stride, pd->subsampling_x, pd->subsampling_y,
                         16, 16, 0);
        }

        model_rd_for_sb(cpi, bsize, x, xd, 0, MAX_MB_PLANE - 1, &tmp_rate,
                        &tmp_dist, &skip_txfm_sb, &skip_sse_sb);
      } else {
        continue;
      }
    }
#endif  // CONFIG_WARPED_MOTION
    x->skip = 0;

    rd_stats->dist = 0;
    rd_stats->sse = 0;
    rd_stats->skip = 1;
    rd_stats->rate = tmp_rate2;
    if (last_motion_mode_allowed > SIMPLE_TRANSLATION) {
#if CONFIG_WARPED_MOTION && CONFIG_MOTION_VAR
      if (last_motion_mode_allowed == WARPED_CAUSAL)
#endif  // CONFIG_WARPED_MOTION && CONFIG_MOTION_VAR
        rd_stats->rate += cpi->motion_mode_cost[bsize][mbmi->motion_mode];
#if CONFIG_WARPED_MOTION && CONFIG_MOTION_VAR
      else
        rd_stats->rate += cpi->motion_mode_cost1[bsize][mbmi->motion_mode];
#endif  // CONFIG_WARPED_MOTION && CONFIG_MOTION_VAR
    }
#if CONFIG_WARPED_MOTION
    if (mbmi->motion_mode == WARPED_CAUSAL) {
      rd_stats->rate -= rs;
    }
#endif  // CONFIG_WARPED_MOTION
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
    if (!skip_txfm_sb) {
      int64_t rdcosty = INT64_MAX;
      int is_cost_valid_uv = 0;

      // cost and distortion
      av1_subtract_plane(x, bsize, 0);
#if CONFIG_VAR_TX
      if (cm->tx_mode == TX_MODE_SELECT && !xd->lossless[mbmi->segment_id]) {
        select_tx_type_yrd(cpi, x, rd_stats_y, bsize, ref_best_rd);
      } else {
        int idx, idy;
        super_block_yrd(cpi, x, rd_stats_y, bsize, ref_best_rd);
        for (idy = 0; idy < xd->n8_h; ++idy)
          for (idx = 0; idx < xd->n8_w; ++idx)
            mbmi->inter_tx_size[idy][idx] = mbmi->tx_size;
        memset(x->blk_skip[0], rd_stats_y->skip,
               sizeof(uint8_t) * xd->n8_h * xd->n8_w * 4);
      }
#else
    /* clang-format off */
      super_block_yrd(cpi, x, rd_stats_y, bsize, ref_best_rd);
/* clang-format on */
#endif  // CONFIG_VAR_TX

      if (rd_stats_y->rate == INT_MAX) {
        av1_invalid_rd_stats(rd_stats);
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
        if (mbmi->motion_mode != SIMPLE_TRANSLATION) {
          continue;
        } else {
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
          restore_dst_buf(xd, orig_dst);
          return INT64_MAX;
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
        }
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
      }

      av1_merge_rd_stats(rd_stats, rd_stats_y);

      rdcosty = RDCOST(x->rdmult, x->rddiv, rd_stats->rate, rd_stats->dist);
      rdcosty = AOMMIN(rdcosty, RDCOST(x->rdmult, x->rddiv, 0, rd_stats->sse));
/* clang-format off */
#if CONFIG_VAR_TX
      is_cost_valid_uv =
          inter_block_uvrd(cpi, x, rd_stats_uv, bsize, ref_best_rd - rdcosty);
#else
      is_cost_valid_uv =
          super_block_uvrd(cpi, x, rd_stats_uv, bsize, ref_best_rd - rdcosty);
#endif  // CONFIG_VAR_TX
      if (!is_cost_valid_uv) {
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
        continue;
#else
      restore_dst_buf(xd, orig_dst);
      return INT64_MAX;
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
      }
      /* clang-format on */
      av1_merge_rd_stats(rd_stats, rd_stats_uv);
#if CONFIG_RD_DEBUG
      // record transform block coefficient cost
      // TODO(angiebird): So far rd_debug tool only detects descrepancy of
      // coefficient cost. Therefore, it is fine to copy rd_stats into mbmi
      // here because we already collect the coefficient cost. Move this part to
      // other place when we need to compare non-coefficient cost.
      mbmi->rd_stats = *rd_stats;
#endif
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
      if (rd_stats->skip) {
        rd_stats->rate -= rd_stats_uv->rate + rd_stats_y->rate;
        rd_stats_y->rate = 0;
        rd_stats_uv->rate = 0;
        rd_stats->rate += av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
        mbmi->skip = 0;
        // here mbmi->skip temporarily plays a role as what this_skip2 does
      } else if (!xd->lossless[mbmi->segment_id] &&
                 (RDCOST(x->rdmult, x->rddiv,
                         rd_stats_y->rate + rd_stats_uv->rate +
                             av1_cost_bit(av1_get_skip_prob(cm, xd), 0),
                         rd_stats->dist) >=
                  RDCOST(x->rdmult, x->rddiv,
                         av1_cost_bit(av1_get_skip_prob(cm, xd), 1),
                         rd_stats->sse))) {
        rd_stats->rate -= rd_stats_uv->rate + rd_stats_y->rate;
        rd_stats->rate += av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
        rd_stats->dist = rd_stats->sse;
        rd_stats_y->rate = 0;
        rd_stats_uv->rate = 0;
        mbmi->skip = 1;
      } else {
        rd_stats->rate += av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
        mbmi->skip = 0;
      }
      *disable_skip = 0;
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
    } else {
      x->skip = 1;
      *disable_skip = 1;
      mbmi->tx_size = tx_size_from_tx_mode(bsize, cm->tx_mode, 1);

// The cost of skip bit needs to be added.
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
      mbmi->skip = 0;
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
      rd_stats->rate += av1_cost_bit(av1_get_skip_prob(cm, xd), 1);

      rd_stats->dist = skip_sse_sb;
      rd_stats->sse = skip_sse_sb;
      rd_stats_y->rate = 0;
      rd_stats_uv->rate = 0;
      rd_stats->skip = 1;
    }
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
    if (!is_comp_pred && mbmi->motion_mode == SIMPLE_TRANSLATION)
      single_skippable[this_mode][refs[0]] = rd_stats->skip;
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION

#if CONFIG_GLOBAL_MOTION
    if (this_mode == ZEROMV
#if CONFIG_EXT_INTER
        || this_mode == ZERO_ZEROMV
#endif  // CONFIG_EXT_INTER
        ) {
      rd_stats->rate += GLOBAL_MOTION_RATE(cpi, mbmi->ref_frame[0]);
      if (is_comp_pred)
        rd_stats->rate += GLOBAL_MOTION_RATE(cpi, mbmi->ref_frame[1]);
      if (is_nontrans_global_motion(xd)) {
        rd_stats->rate -= rs;
#if CONFIG_DUAL_FILTER
        mbmi->interp_filter[0] = cm->interp_filter == SWITCHABLE
                                     ? EIGHTTAP_REGULAR
                                     : cm->interp_filter;
        mbmi->interp_filter[1] = cm->interp_filter == SWITCHABLE
                                     ? EIGHTTAP_REGULAR
                                     : cm->interp_filter;
#else
        mbmi->interp_filter = cm->interp_filter == SWITCHABLE
                                  ? EIGHTTAP_REGULAR
                                  : cm->interp_filter;
#endif  // CONFIG_DUAL_FILTER
      }
    }
#endif  // CONFIG_GLOBAL_MOTION

#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
    tmp_rd = RDCOST(x->rdmult, x->rddiv, rd_stats->rate, rd_stats->dist);
    if (mbmi->motion_mode == SIMPLE_TRANSLATION || (tmp_rd < best_rd)) {
      best_mbmi = *mbmi;
      best_rd = tmp_rd;
      best_rd_stats = *rd_stats;
      best_rd_stats_y = *rd_stats_y;
      best_rd_stats_uv = *rd_stats_uv;
#if CONFIG_VAR_TX
      for (i = 0; i < MAX_MB_PLANE; ++i)
        memcpy(best_blk_skip[i], x->blk_skip[i],
               sizeof(uint8_t) * xd->n8_h * xd->n8_w * 4);
#endif  // CONFIG_VAR_TX
      best_xskip = x->skip;
      best_disable_skip = *disable_skip;
#if CONFIG_AOM_HIGHBITDEPTH
      if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
        x->recon_variance = av1_high_get_sby_perpixel_variance(
            cpi, &xd->plane[0].dst, bsize, xd->bd);
      } else {
        x->recon_variance =
            av1_get_sby_perpixel_variance(cpi, &xd->plane[0].dst, bsize);
      }
#else
      x->recon_variance =
          av1_get_sby_perpixel_variance(cpi, &xd->plane[0].dst, bsize);
#endif  // CONFIG_AOM_HIGHBITDEPTH
    }
  }

  if (best_rd == INT64_MAX) {
    av1_invalid_rd_stats(rd_stats);
    restore_dst_buf(xd, orig_dst);
    return INT64_MAX;
  }
  *mbmi = best_mbmi;
  *rd_stats = best_rd_stats;
  *rd_stats_y = best_rd_stats_y;
  *rd_stats_uv = best_rd_stats_uv;
#if CONFIG_VAR_TX
  for (i = 0; i < MAX_MB_PLANE; ++i)
    memcpy(x->blk_skip[i], best_blk_skip[i],
           sizeof(uint8_t) * xd->n8_h * xd->n8_w * 4);
#endif  // CONFIG_VAR_TX
  x->skip = best_xskip;
  *disable_skip = best_disable_skip;
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION

#if !(CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION)
  if (!is_comp_pred) single_skippable[this_mode][refs[0]] = rd_stats->skip;

#if CONFIG_AOM_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    x->recon_variance = av1_high_get_sby_perpixel_variance(
        cpi, &xd->plane[0].dst, bsize, xd->bd);
  } else {
    x->recon_variance =
        av1_get_sby_perpixel_variance(cpi, &xd->plane[0].dst, bsize);
  }
#else
  x->recon_variance =
      av1_get_sby_perpixel_variance(cpi, &xd->plane[0].dst, bsize);
#endif  // CONFIG_AOM_HIGHBITDEPTH
#endif  // !(CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION)

  restore_dst_buf(xd, orig_dst);
  return 0;  // The rate-distortion cost will be re-calculated by caller.
}

void av1_rd_pick_intra_mode_sb(const AV1_COMP *cpi, MACROBLOCK *x,
                               RD_COST *rd_cost, BLOCK_SIZE bsize,
                               PICK_MODE_CONTEXT *ctx, int64_t best_rd) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  struct macroblockd_plane *const pd = xd->plane;
  int rate_y = 0, rate_uv = 0, rate_y_tokenonly = 0, rate_uv_tokenonly = 0;
  int y_skip = 0, uv_skip = 0;
  int64_t dist_y = 0, dist_uv = 0;
  TX_SIZE max_uv_tx_size;
  const int unify_bsize = CONFIG_CB4X4;

  ctx->skip = 0;
  xd->mi[0]->mbmi.ref_frame[0] = INTRA_FRAME;
  xd->mi[0]->mbmi.ref_frame[1] = NONE_FRAME;

  if (bsize >= BLOCK_8X8 || unify_bsize) {
    if (rd_pick_intra_sby_mode(cpi, x, &rate_y, &rate_y_tokenonly, &dist_y,
                               &y_skip, bsize, best_rd) >= best_rd) {
      rd_cost->rate = INT_MAX;
      return;
    }
  } else {
    if (rd_pick_intra_sub_8x8_y_mode(cpi, x, &rate_y, &rate_y_tokenonly,
                                     &dist_y, &y_skip, best_rd) >= best_rd) {
      rd_cost->rate = INT_MAX;
      return;
    }
  }
  max_uv_tx_size = uv_txsize_lookup[bsize][xd->mi[0]->mbmi.tx_size]
                                   [pd[1].subsampling_x][pd[1].subsampling_y];

#if CONFIG_CB4X4
  rd_pick_intra_sbuv_mode(cpi, x, &rate_uv, &rate_uv_tokenonly, &dist_uv,
                          &uv_skip, bsize, max_uv_tx_size);
#else
  rd_pick_intra_sbuv_mode(cpi, x, &rate_uv, &rate_uv_tokenonly, &dist_uv,
                          &uv_skip, AOMMAX(BLOCK_8X8, bsize), max_uv_tx_size);
#endif

  if (y_skip && uv_skip) {
    rd_cost->rate = rate_y + rate_uv - rate_y_tokenonly - rate_uv_tokenonly +
                    av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
    rd_cost->dist = dist_y + dist_uv;
  } else {
    rd_cost->rate =
        rate_y + rate_uv + av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
    rd_cost->dist = dist_y + dist_uv;
  }

  ctx->mic = *xd->mi[0];
  ctx->mbmi_ext = *x->mbmi_ext;
  rd_cost->rdcost = RDCOST(x->rdmult, x->rddiv, rd_cost->rate, rd_cost->dist);
}

// Do we have an internal image edge (e.g. formatting bars).
int av1_internal_image_edge(const AV1_COMP *cpi) {
  return (cpi->oxcf.pass == 2) &&
         ((cpi->twopass.this_frame_stats.inactive_zone_rows > 0) ||
          (cpi->twopass.this_frame_stats.inactive_zone_cols > 0));
}

// Checks to see if a super block is on a horizontal image edge.
// In most cases this is the "real" edge unless there are formatting
// bars embedded in the stream.
int av1_active_h_edge(const AV1_COMP *cpi, int mi_row, int mi_step) {
  int top_edge = 0;
  int bottom_edge = cpi->common.mi_rows;
  int is_active_h_edge = 0;

  // For two pass account for any formatting bars detected.
  if (cpi->oxcf.pass == 2) {
    const TWO_PASS *const twopass = &cpi->twopass;

    // The inactive region is specified in MBs not mi units.
    // The image edge is in the following MB row.
    top_edge += (int)(twopass->this_frame_stats.inactive_zone_rows * 2);

    bottom_edge -= (int)(twopass->this_frame_stats.inactive_zone_rows * 2);
    bottom_edge = AOMMAX(top_edge, bottom_edge);
  }

  if (((top_edge >= mi_row) && (top_edge < (mi_row + mi_step))) ||
      ((bottom_edge >= mi_row) && (bottom_edge < (mi_row + mi_step)))) {
    is_active_h_edge = 1;
  }
  return is_active_h_edge;
}

// Checks to see if a super block is on a vertical image edge.
// In most cases this is the "real" edge unless there are formatting
// bars embedded in the stream.
int av1_active_v_edge(const AV1_COMP *cpi, int mi_col, int mi_step) {
  int left_edge = 0;
  int right_edge = cpi->common.mi_cols;
  int is_active_v_edge = 0;

  // For two pass account for any formatting bars detected.
  if (cpi->oxcf.pass == 2) {
    const TWO_PASS *const twopass = &cpi->twopass;

    // The inactive region is specified in MBs not mi units.
    // The image edge is in the following MB row.
    left_edge += (int)(twopass->this_frame_stats.inactive_zone_cols * 2);

    right_edge -= (int)(twopass->this_frame_stats.inactive_zone_cols * 2);
    right_edge = AOMMAX(left_edge, right_edge);
  }

  if (((left_edge >= mi_col) && (left_edge < (mi_col + mi_step))) ||
      ((right_edge >= mi_col) && (right_edge < (mi_col + mi_step)))) {
    is_active_v_edge = 1;
  }
  return is_active_v_edge;
}

// Checks to see if a super block is at the edge of the active image.
// In most cases this is the "real" edge unless there are formatting
// bars embedded in the stream.
int av1_active_edge_sb(const AV1_COMP *cpi, int mi_row, int mi_col) {
  return av1_active_h_edge(cpi, mi_row, cpi->common.mib_size) ||
         av1_active_v_edge(cpi, mi_col, cpi->common.mib_size);
}

#if CONFIG_PALETTE
static void restore_uv_color_map(const AV1_COMP *const cpi, MACROBLOCK *x) {
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info;
  const BLOCK_SIZE bsize = mbmi->sb_type;
  int src_stride = x->plane[1].src.stride;
  const uint8_t *const src_u = x->plane[1].src.buf;
  const uint8_t *const src_v = x->plane[2].src.buf;
  float *const data = x->palette_buffer->kmeans_data_buf;
  float centroids[2 * PALETTE_MAX_SIZE];
  uint8_t *const color_map = xd->plane[1].color_index_map;
  int r, c;
#if CONFIG_AOM_HIGHBITDEPTH
  const uint16_t *const src_u16 = CONVERT_TO_SHORTPTR(src_u);
  const uint16_t *const src_v16 = CONVERT_TO_SHORTPTR(src_v);
#endif  // CONFIG_AOM_HIGHBITDEPTH
  int plane_block_width, plane_block_height, rows, cols;
  av1_get_block_dimensions(bsize, 1, xd, &plane_block_width,
                           &plane_block_height, &rows, &cols);
  (void)cpi;

  for (r = 0; r < rows; ++r) {
    for (c = 0; c < cols; ++c) {
#if CONFIG_AOM_HIGHBITDEPTH
      if (cpi->common.use_highbitdepth) {
        data[(r * cols + c) * 2] = src_u16[r * src_stride + c];
        data[(r * cols + c) * 2 + 1] = src_v16[r * src_stride + c];
      } else {
#endif  // CONFIG_AOM_HIGHBITDEPTH
        data[(r * cols + c) * 2] = src_u[r * src_stride + c];
        data[(r * cols + c) * 2 + 1] = src_v[r * src_stride + c];
#if CONFIG_AOM_HIGHBITDEPTH
      }
#endif  // CONFIG_AOM_HIGHBITDEPTH
    }
  }

  for (r = 1; r < 3; ++r) {
    for (c = 0; c < pmi->palette_size[1]; ++c) {
      centroids[c * 2 + r - 1] = pmi->palette_colors[r * PALETTE_MAX_SIZE + c];
    }
  }

  av1_calc_indices(data, centroids, color_map, rows * cols,
                   pmi->palette_size[1], 2);
  extend_palette_color_map(color_map, cols, rows, plane_block_width,
                           plane_block_height);
}
#endif  // CONFIG_PALETTE

#if CONFIG_FILTER_INTRA
static void pick_filter_intra_interframe(
    const AV1_COMP *cpi, MACROBLOCK *x, PICK_MODE_CONTEXT *ctx,
    BLOCK_SIZE bsize, int *rate_uv_intra, int *rate_uv_tokenonly,
    int64_t *dist_uv, int *skip_uv, PREDICTION_MODE *mode_uv,
    FILTER_INTRA_MODE_INFO *filter_intra_mode_info_uv,
#if CONFIG_EXT_INTRA
    int8_t *uv_angle_delta,
#endif  // CONFIG_EXT_INTRA
#if CONFIG_PALETTE
    PALETTE_MODE_INFO *pmi_uv, int palette_ctx,
#endif  // CONFIG_PALETTE
    int skip_mask, unsigned int *ref_costs_single, int64_t *best_rd,
    int64_t *best_intra_rd, PREDICTION_MODE *best_intra_mode,
    int *best_mode_index, int *best_skip2, int *best_mode_skippable,
#if CONFIG_SUPERTX
    int *returnrate_nocoef,
#endif  // CONFIG_SUPERTX
    int64_t *best_pred_rd, MB_MODE_INFO *best_mbmode, RD_COST *rd_cost) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
#if CONFIG_PALETTE
  PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info;
#endif  // CONFIG_PALETTE
  int rate2 = 0, rate_y = INT_MAX, skippable = 0, rate_uv, rate_dummy, i;
  int dc_mode_index;
  const int *const intra_mode_cost = cpi->mbmode_cost[size_group_lookup[bsize]];
  int64_t distortion2 = 0, distortion_y = 0, this_rd = *best_rd;
  int64_t distortion_uv, model_rd = INT64_MAX;
  TX_SIZE uv_tx;

  for (i = 0; i < MAX_MODES; ++i)
    if (av1_mode_order[i].mode == DC_PRED &&
        av1_mode_order[i].ref_frame[0] == INTRA_FRAME)
      break;
  dc_mode_index = i;
  assert(i < MAX_MODES);

  // TODO(huisu): use skip_mask for further speedup.
  (void)skip_mask;
  mbmi->mode = DC_PRED;
  mbmi->uv_mode = DC_PRED;
  mbmi->ref_frame[0] = INTRA_FRAME;
  mbmi->ref_frame[1] = NONE_FRAME;
  if (!rd_pick_filter_intra_sby(cpi, x, &rate_dummy, &rate_y, &distortion_y,
                                &skippable, bsize, intra_mode_cost[mbmi->mode],
                                &this_rd, &model_rd, 0)) {
    return;
  }
  if (rate_y == INT_MAX) return;

  uv_tx = uv_txsize_lookup[bsize][mbmi->tx_size][xd->plane[1].subsampling_x]
                          [xd->plane[1].subsampling_y];
  if (rate_uv_intra[uv_tx] == INT_MAX) {
    choose_intra_uv_mode(cpi, x, ctx, bsize, uv_tx, &rate_uv_intra[uv_tx],
                         &rate_uv_tokenonly[uv_tx], &dist_uv[uv_tx],
                         &skip_uv[uv_tx], &mode_uv[uv_tx]);
#if CONFIG_PALETTE
    if (cm->allow_screen_content_tools) pmi_uv[uv_tx] = *pmi;
#endif  // CONFIG_PALETTE
    filter_intra_mode_info_uv[uv_tx] = mbmi->filter_intra_mode_info;
#if CONFIG_EXT_INTRA
    uv_angle_delta[uv_tx] = mbmi->angle_delta[1];
#endif  // CONFIG_EXT_INTRA
  }

  rate_uv = rate_uv_tokenonly[uv_tx];
  distortion_uv = dist_uv[uv_tx];
  skippable = skippable && skip_uv[uv_tx];
  mbmi->uv_mode = mode_uv[uv_tx];
#if CONFIG_PALETTE
  if (cm->allow_screen_content_tools) {
    pmi->palette_size[1] = pmi_uv[uv_tx].palette_size[1];
    memcpy(pmi->palette_colors + PALETTE_MAX_SIZE,
           pmi_uv[uv_tx].palette_colors + PALETTE_MAX_SIZE,
           2 * PALETTE_MAX_SIZE * sizeof(pmi->palette_colors[0]));
  }
#endif  // CONFIG_PALETTE
#if CONFIG_EXT_INTRA
  mbmi->angle_delta[1] = uv_angle_delta[uv_tx];
#endif  // CONFIG_EXT_INTRA
  mbmi->filter_intra_mode_info.use_filter_intra_mode[1] =
      filter_intra_mode_info_uv[uv_tx].use_filter_intra_mode[1];
  if (filter_intra_mode_info_uv[uv_tx].use_filter_intra_mode[1]) {
    mbmi->filter_intra_mode_info.filter_intra_mode[1] =
        filter_intra_mode_info_uv[uv_tx].filter_intra_mode[1];
  }

  rate2 = rate_y + intra_mode_cost[mbmi->mode] + rate_uv +
          cpi->intra_uv_mode_cost[mbmi->mode][mbmi->uv_mode];
#if CONFIG_PALETTE
  if (cpi->common.allow_screen_content_tools && mbmi->mode == DC_PRED)
    rate2 += av1_cost_bit(
        av1_default_palette_y_mode_prob[bsize - BLOCK_8X8][palette_ctx], 0);
#endif  // CONFIG_PALETTE

  if (!xd->lossless[mbmi->segment_id]) {
    // super_block_yrd above includes the cost of the tx_size in the
    // tokenonly rate, but for intra blocks, tx_size is always coded
    // (prediction granularity), so we account for it in the full rate,
    // not the tokenonly rate.
    rate_y -= tx_size_cost(cpi, x, bsize, mbmi->tx_size);
  }

  rate2 += av1_cost_bit(cm->fc->filter_intra_probs[0],
                        mbmi->filter_intra_mode_info.use_filter_intra_mode[0]);
  rate2 += write_uniform_cost(
      FILTER_INTRA_MODES, mbmi->filter_intra_mode_info.filter_intra_mode[0]);
#if CONFIG_EXT_INTRA
  if (av1_is_directional_mode(mbmi->uv_mode, bsize)) {
    rate2 += write_uniform_cost(2 * MAX_ANGLE_DELTA_UV + 1,
                                MAX_ANGLE_DELTA_UV + mbmi->angle_delta[1]);
  }
#endif  // CONFIG_EXT_INTRA
  if (mbmi->mode == DC_PRED) {
    rate2 +=
        av1_cost_bit(cpi->common.fc->filter_intra_probs[1],
                     mbmi->filter_intra_mode_info.use_filter_intra_mode[1]);
    if (mbmi->filter_intra_mode_info.use_filter_intra_mode[1])
      rate2 +=
          write_uniform_cost(FILTER_INTRA_MODES,
                             mbmi->filter_intra_mode_info.filter_intra_mode[1]);
  }
  distortion2 = distortion_y + distortion_uv;
  av1_encode_intra_block_plane((AV1_COMMON *)cm, x, bsize, 0, 0);
#if CONFIG_AOM_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    x->recon_variance = av1_high_get_sby_perpixel_variance(
        cpi, &xd->plane[0].dst, bsize, xd->bd);
  } else {
    x->recon_variance =
        av1_get_sby_perpixel_variance(cpi, &xd->plane[0].dst, bsize);
  }
#else
  x->recon_variance =
      av1_get_sby_perpixel_variance(cpi, &xd->plane[0].dst, bsize);
#endif  // CONFIG_AOM_HIGHBITDEPTH

  rate2 += ref_costs_single[INTRA_FRAME];

  if (skippable) {
    rate2 -= (rate_y + rate_uv);
    rate_y = 0;
    rate_uv = 0;
    rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
  } else {
    rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
  }
  this_rd = RDCOST(x->rdmult, x->rddiv, rate2, distortion2);

  if (this_rd < *best_intra_rd) {
    *best_intra_rd = this_rd;
    *best_intra_mode = mbmi->mode;
  }
  for (i = 0; i < REFERENCE_MODES; ++i)
    best_pred_rd[i] = AOMMIN(best_pred_rd[i], this_rd);

  if (this_rd < *best_rd) {
    *best_mode_index = dc_mode_index;
    mbmi->mv[0].as_int = 0;
    rd_cost->rate = rate2;
#if CONFIG_SUPERTX
    if (x->skip)
      *returnrate_nocoef = rate2;
    else
      *returnrate_nocoef = rate2 - rate_y - rate_uv;
    *returnrate_nocoef -= av1_cost_bit(av1_get_skip_prob(cm, xd), skippable);
    *returnrate_nocoef -= av1_cost_bit(av1_get_intra_inter_prob(cm, xd),
                                       mbmi->ref_frame[0] != INTRA_FRAME);
#endif  // CONFIG_SUPERTX
    rd_cost->dist = distortion2;
    rd_cost->rdcost = this_rd;
    *best_rd = this_rd;
    *best_mbmode = *mbmi;
    *best_skip2 = 0;
    *best_mode_skippable = skippable;
  }
}
#endif  // CONFIG_FILTER_INTRA

#if CONFIG_MOTION_VAR
static void calc_target_weighted_pred(const AV1_COMMON *cm, const MACROBLOCK *x,
                                      const MACROBLOCKD *xd, int mi_row,
                                      int mi_col, const uint8_t *above,
                                      int above_stride, const uint8_t *left,
                                      int left_stride);
#endif  // CONFIG_MOTION_VAR

void av1_rd_pick_inter_mode_sb(const AV1_COMP *cpi, TileDataEnc *tile_data,
                               MACROBLOCK *x, int mi_row, int mi_col,
                               RD_COST *rd_cost,
#if CONFIG_SUPERTX
                               int *returnrate_nocoef,
#endif  // CONFIG_SUPERTX
                               BLOCK_SIZE bsize, PICK_MODE_CONTEXT *ctx,
                               int64_t best_rd_so_far) {
  const AV1_COMMON *const cm = &cpi->common;
  const RD_OPT *const rd_opt = &cpi->rd;
  const SPEED_FEATURES *const sf = &cpi->sf;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
#if CONFIG_PALETTE
  PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info;
#endif  // CONFIG_PALETTE
  MB_MODE_INFO_EXT *const mbmi_ext = x->mbmi_ext;
  const struct segmentation *const seg = &cm->seg;
  PREDICTION_MODE this_mode;
  MV_REFERENCE_FRAME ref_frame, second_ref_frame;
  unsigned char segment_id = mbmi->segment_id;
  int comp_pred, i, k;
  int_mv frame_mv[MB_MODE_COUNT][TOTAL_REFS_PER_FRAME];
  struct buf_2d yv12_mb[TOTAL_REFS_PER_FRAME][MAX_MB_PLANE];
#if CONFIG_EXT_INTER
  int_mv single_newmvs[2][TOTAL_REFS_PER_FRAME] = { { { 0 } }, { { 0 } } };
  int single_newmvs_rate[2][TOTAL_REFS_PER_FRAME] = { { 0 }, { 0 } };
  int64_t modelled_rd[MB_MODE_COUNT][TOTAL_REFS_PER_FRAME];
#else
  int_mv single_newmv[TOTAL_REFS_PER_FRAME] = { { 0 } };
#endif  // CONFIG_EXT_INTER
  InterpFilter single_inter_filter[MB_MODE_COUNT][TOTAL_REFS_PER_FRAME];
  int single_skippable[MB_MODE_COUNT][TOTAL_REFS_PER_FRAME];
  static const int flag_list[TOTAL_REFS_PER_FRAME] = {
    0,
    AOM_LAST_FLAG,
#if CONFIG_EXT_REFS
    AOM_LAST2_FLAG,
    AOM_LAST3_FLAG,
#endif  // CONFIG_EXT_REFS
    AOM_GOLD_FLAG,
#if CONFIG_EXT_REFS
    AOM_BWD_FLAG,
#endif  // CONFIG_EXT_REFS
    AOM_ALT_FLAG
  };
  int64_t best_rd = best_rd_so_far;
  int best_rate_y = INT_MAX, best_rate_uv = INT_MAX;
  int64_t best_pred_diff[REFERENCE_MODES];
  int64_t best_pred_rd[REFERENCE_MODES];
  MB_MODE_INFO best_mbmode;
#if CONFIG_REF_MV
  int rate_skip0 = av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
  int rate_skip1 = av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
#endif
  int best_mode_skippable = 0;
  int midx, best_mode_index = -1;
  unsigned int ref_costs_single[TOTAL_REFS_PER_FRAME];
  unsigned int ref_costs_comp[TOTAL_REFS_PER_FRAME];
  aom_prob comp_mode_p;
  int64_t best_intra_rd = INT64_MAX;
  unsigned int best_pred_sse = UINT_MAX;
  PREDICTION_MODE best_intra_mode = DC_PRED;
  int rate_uv_intra[TX_SIZES_ALL], rate_uv_tokenonly[TX_SIZES_ALL];
  int64_t dist_uvs[TX_SIZES_ALL];
  int skip_uvs[TX_SIZES_ALL];
  PREDICTION_MODE mode_uv[TX_SIZES_ALL];
#if CONFIG_PALETTE
  PALETTE_MODE_INFO pmi_uv[TX_SIZES_ALL];
#endif  // CONFIG_PALETTE
#if CONFIG_EXT_INTRA
  int8_t uv_angle_delta[TX_SIZES_ALL];
  int is_directional_mode, angle_stats_ready = 0;
  uint8_t directional_mode_skip_mask[INTRA_MODES];
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
  int8_t dc_skipped = 1;
  FILTER_INTRA_MODE_INFO filter_intra_mode_info_uv[TX_SIZES_ALL];
#endif  // CONFIG_FILTER_INTRA
  const int intra_cost_penalty = av1_get_intra_cost_penalty(
      cm->base_qindex, cm->y_dc_delta_q, cm->bit_depth);
  const int *const intra_mode_cost = cpi->mbmode_cost[size_group_lookup[bsize]];
  int best_skip2 = 0;
  uint8_t ref_frame_skip_mask[2] = { 0 };
#if CONFIG_EXT_INTER
  uint32_t mode_skip_mask[TOTAL_REFS_PER_FRAME] = { 0 };
  MV_REFERENCE_FRAME best_single_inter_ref = LAST_FRAME;
  int64_t best_single_inter_rd = INT64_MAX;
#else
  uint16_t mode_skip_mask[TOTAL_REFS_PER_FRAME] = { 0 };
#endif  // CONFIG_EXT_INTER
  int mode_skip_start = sf->mode_skip_start + 1;
  const int *const rd_threshes = rd_opt->threshes[segment_id][bsize];
  const int *const rd_thresh_freq_fact = tile_data->thresh_freq_fact[bsize];
  int64_t mode_threshold[MAX_MODES];
  int *mode_map = tile_data->mode_map[bsize];
  const int mode_search_skip_flags = sf->mode_search_skip_flags;
#if CONFIG_PVQ
  od_rollback_buffer pre_buf;
#endif

#if CONFIG_PALETTE || CONFIG_EXT_INTRA
  const int rows = block_size_high[bsize];
  const int cols = block_size_wide[bsize];
#endif  // CONFIG_PALETTE || CONFIG_EXT_INTRA
#if CONFIG_PALETTE
  int palette_ctx = 0;
  const MODE_INFO *above_mi = xd->above_mi;
  const MODE_INFO *left_mi = xd->left_mi;
#endif  // CONFIG_PALETTE
#if CONFIG_MOTION_VAR
#if CONFIG_AOM_HIGHBITDEPTH
  DECLARE_ALIGNED(16, uint8_t, tmp_buf1[2 * MAX_MB_PLANE * MAX_SB_SQUARE]);
  DECLARE_ALIGNED(16, uint8_t, tmp_buf2[2 * MAX_MB_PLANE * MAX_SB_SQUARE]);
#else
  DECLARE_ALIGNED(16, uint8_t, tmp_buf1[MAX_MB_PLANE * MAX_SB_SQUARE]);
  DECLARE_ALIGNED(16, uint8_t, tmp_buf2[MAX_MB_PLANE * MAX_SB_SQUARE]);
#endif  // CONFIG_AOM_HIGHBITDEPTH
  DECLARE_ALIGNED(16, int32_t, weighted_src_buf[MAX_SB_SQUARE]);
  DECLARE_ALIGNED(16, int32_t, mask2d_buf[MAX_SB_SQUARE]);
  uint8_t *dst_buf1[MAX_MB_PLANE], *dst_buf2[MAX_MB_PLANE];
  int dst_width1[MAX_MB_PLANE] = { MAX_SB_SIZE, MAX_SB_SIZE, MAX_SB_SIZE };
  int dst_width2[MAX_MB_PLANE] = { MAX_SB_SIZE, MAX_SB_SIZE, MAX_SB_SIZE };
  int dst_height1[MAX_MB_PLANE] = { MAX_SB_SIZE, MAX_SB_SIZE, MAX_SB_SIZE };
  int dst_height2[MAX_MB_PLANE] = { MAX_SB_SIZE, MAX_SB_SIZE, MAX_SB_SIZE };
  int dst_stride1[MAX_MB_PLANE] = { MAX_SB_SIZE, MAX_SB_SIZE, MAX_SB_SIZE };
  int dst_stride2[MAX_MB_PLANE] = { MAX_SB_SIZE, MAX_SB_SIZE, MAX_SB_SIZE };

#if CONFIG_AOM_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_SB_SQUARE * len);
    dst_buf1[2] = CONVERT_TO_BYTEPTR(tmp_buf1 + 2 * MAX_SB_SQUARE * len);
    dst_buf2[0] = CONVERT_TO_BYTEPTR(tmp_buf2);
    dst_buf2[1] = CONVERT_TO_BYTEPTR(tmp_buf2 + MAX_SB_SQUARE * len);
    dst_buf2[2] = CONVERT_TO_BYTEPTR(tmp_buf2 + 2 * MAX_SB_SQUARE * len);
  } else {
#endif  // CONFIG_AOM_HIGHBITDEPTH
    dst_buf1[0] = tmp_buf1;
    dst_buf1[1] = tmp_buf1 + MAX_SB_SQUARE;
    dst_buf1[2] = tmp_buf1 + 2 * MAX_SB_SQUARE;
    dst_buf2[0] = tmp_buf2;
    dst_buf2[1] = tmp_buf2 + MAX_SB_SQUARE;
    dst_buf2[2] = tmp_buf2 + 2 * MAX_SB_SQUARE;
#if CONFIG_AOM_HIGHBITDEPTH
  }
#endif  // CONFIG_AOM_HIGHBITDEPTH
#endif  // CONFIG_MOTION_VAR

  av1_zero(best_mbmode);

#if CONFIG_PALETTE
  av1_zero(pmi_uv);
  if (cm->allow_screen_content_tools) {
    if (above_mi)
      palette_ctx += (above_mi->mbmi.palette_mode_info.palette_size[0] > 0);
    if (left_mi)
      palette_ctx += (left_mi->mbmi.palette_mode_info.palette_size[0] > 0);
  }
#endif  // CONFIG_PALETTE

#if CONFIG_EXT_INTRA
  memset(directional_mode_skip_mask, 0,
         sizeof(directional_mode_skip_mask[0]) * INTRA_MODES);
#endif  // CONFIG_EXT_INTRA

  estimate_ref_frame_costs(cm, xd, segment_id, ref_costs_single, ref_costs_comp,
                           &comp_mode_p);

  for (i = 0; i < REFERENCE_MODES; ++i) best_pred_rd[i] = INT64_MAX;
  for (i = 0; i < TX_SIZES_ALL; i++) rate_uv_intra[i] = INT_MAX;
  for (i = 0; i < TOTAL_REFS_PER_FRAME; ++i) x->pred_sse[i] = INT_MAX;
  for (i = 0; i < MB_MODE_COUNT; ++i) {
    for (k = 0; k < TOTAL_REFS_PER_FRAME; ++k) {
      single_inter_filter[i][k] = SWITCHABLE;
      single_skippable[i][k] = 0;
    }
  }

  rd_cost->rate = INT_MAX;
#if CONFIG_SUPERTX
  *returnrate_nocoef = INT_MAX;
#endif  // CONFIG_SUPERTX

  for (ref_frame = LAST_FRAME; ref_frame <= ALTREF_FRAME; ++ref_frame) {
    x->pred_mv_sad[ref_frame] = INT_MAX;
    x->mbmi_ext->mode_context[ref_frame] = 0;
#if CONFIG_REF_MV && CONFIG_EXT_INTER
    x->mbmi_ext->compound_mode_context[ref_frame] = 0;
#endif  // CONFIG_REF_MV && CONFIG_EXT_INTER
    if (cpi->ref_frame_flags & flag_list[ref_frame]) {
      assert(get_ref_frame_buffer(cpi, ref_frame) != NULL);
      setup_buffer_inter(cpi, x, ref_frame, bsize, mi_row, mi_col,
                         frame_mv[NEARESTMV], frame_mv[NEARMV], yv12_mb);
    }
    frame_mv[NEWMV][ref_frame].as_int = INVALID_MV;
#if CONFIG_GLOBAL_MOTION
    frame_mv[ZEROMV][ref_frame].as_int =
        gm_get_motion_vector(&cm->global_motion[ref_frame],
                             cm->allow_high_precision_mv)
            .as_int;
#else   // CONFIG_GLOBAL_MOTION
    frame_mv[ZEROMV][ref_frame].as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
#if CONFIG_EXT_INTER
    frame_mv[NEWFROMNEARMV][ref_frame].as_int = INVALID_MV;
    frame_mv[NEW_NEWMV][ref_frame].as_int = INVALID_MV;
#if CONFIG_GLOBAL_MOTION
    frame_mv[ZERO_ZEROMV][ref_frame].as_int =
        gm_get_motion_vector(&cm->global_motion[ref_frame],
                             cm->allow_high_precision_mv)
            .as_int;
#else   // CONFIG_GLOBAL_MOTION
    frame_mv[ZERO_ZEROMV][ref_frame].as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
#endif  // CONFIG_EXT_INTER
  }

#if CONFIG_REF_MV
  for (; ref_frame < MODE_CTX_REF_FRAMES; ++ref_frame) {
    MODE_INFO *const mi = xd->mi[0];
    int_mv *const candidates = x->mbmi_ext->ref_mvs[ref_frame];
    x->mbmi_ext->mode_context[ref_frame] = 0;
    av1_find_mv_refs(cm, xd, mi, ref_frame, &mbmi_ext->ref_mv_count[ref_frame],
                     mbmi_ext->ref_mv_stack[ref_frame],
#if CONFIG_EXT_INTER
                     mbmi_ext->compound_mode_context,
#endif  // CONFIG_EXT_INTER
                     candidates, mi_row, mi_col, NULL, NULL,
                     mbmi_ext->mode_context);
    if (mbmi_ext->ref_mv_count[ref_frame] < 2) {
      MV_REFERENCE_FRAME rf[2];
      av1_set_ref_frame(rf, ref_frame);
      if (mbmi_ext->ref_mvs[rf[0]][0].as_int !=
              frame_mv[ZEROMV][rf[0]].as_int ||
          mbmi_ext->ref_mvs[rf[0]][1].as_int !=
              frame_mv[ZEROMV][rf[0]].as_int ||
          mbmi_ext->ref_mvs[rf[1]][0].as_int !=
              frame_mv[ZEROMV][rf[1]].as_int ||
          mbmi_ext->ref_mvs[rf[1]][1].as_int != frame_mv[ZEROMV][rf[1]].as_int)
        mbmi_ext->mode_context[ref_frame] &= ~(1 << ALL_ZERO_FLAG_OFFSET);
    }
  }
#endif  // CONFIG_REF_MV

#if CONFIG_MOTION_VAR
  av1_build_prediction_by_above_preds(cm, xd, mi_row, mi_col, dst_buf1,
                                      dst_width1, dst_height1, dst_stride1);
  av1_build_prediction_by_left_preds(cm, xd, mi_row, mi_col, dst_buf2,
                                     dst_width2, dst_height2, dst_stride2);
  av1_setup_dst_planes(xd->plane, get_frame_new_buffer(cm), mi_row, mi_col);
  x->mask_buf = mask2d_buf;
  x->wsrc_buf = weighted_src_buf;
  calc_target_weighted_pred(cm, x, xd, mi_row, mi_col, dst_buf1[0],
                            dst_stride1[0], dst_buf2[0], dst_stride2[0]);
#endif  // CONFIG_MOTION_VAR

  for (ref_frame = LAST_FRAME; ref_frame <= ALTREF_FRAME; ++ref_frame) {
    if (!(cpi->ref_frame_flags & flag_list[ref_frame])) {
// Skip checking missing references in both single and compound reference
// modes. Note that a mode will be skipped iff both reference frames
// are masked out.
#if CONFIG_EXT_REFS
      if (ref_frame == BWDREF_FRAME || ref_frame == ALTREF_FRAME) {
        ref_frame_skip_mask[0] |= (1 << ref_frame);
        ref_frame_skip_mask[1] |= ((1 << ref_frame) | 0x01);
      } else {
#endif  // CONFIG_EXT_REFS
        ref_frame_skip_mask[0] |= (1 << ref_frame);
        ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
#if CONFIG_EXT_REFS
      }
#endif  // CONFIG_EXT_REFS
    } else {
      for (i = LAST_FRAME; i <= ALTREF_FRAME; ++i) {
        // Skip fixed mv modes for poor references
        if ((x->pred_mv_sad[ref_frame] >> 2) > x->pred_mv_sad[i]) {
          mode_skip_mask[ref_frame] |= INTER_NEAREST_NEAR_ZERO;
          break;
        }
      }
    }
    // If the segment reference frame feature is enabled....
    // then do nothing if the current ref frame is not allowed..
    if (segfeature_active(seg, segment_id, SEG_LVL_REF_FRAME) &&
        get_segdata(seg, segment_id, SEG_LVL_REF_FRAME) != (int)ref_frame) {
      ref_frame_skip_mask[0] |= (1 << ref_frame);
      ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
    }
  }

  // Disable this drop out case if the ref frame
  // segment level feature is enabled for this segment. This is to
  // prevent the possibility that we end up unable to pick any mode.
  if (!segfeature_active(seg, segment_id, SEG_LVL_REF_FRAME)) {
    // Only consider ZEROMV/ALTREF_FRAME for alt ref frame,
    // unless ARNR filtering is enabled in which case we want
    // an unfiltered alternative. We allow near/nearest as well
    // because they may result in zero-zero MVs but be cheaper.
    if (cpi->rc.is_src_frame_alt_ref && (cpi->oxcf.arnr_max_frames == 0)) {
      int_mv zeromv;
      ref_frame_skip_mask[0] = (1 << LAST_FRAME) |
#if CONFIG_EXT_REFS
                               (1 << LAST2_FRAME) | (1 << LAST3_FRAME) |
                               (1 << BWDREF_FRAME) |
#endif  // CONFIG_EXT_REFS
                               (1 << GOLDEN_FRAME);
      ref_frame_skip_mask[1] = SECOND_REF_FRAME_MASK;
      // TODO(zoeliu): To further explore whether following needs to be done for
      //               BWDREF_FRAME as well.
      mode_skip_mask[ALTREF_FRAME] = ~INTER_NEAREST_NEAR_ZERO;
#if CONFIG_GLOBAL_MOTION
      zeromv.as_int = gm_get_motion_vector(&cm->global_motion[ALTREF_FRAME],
                                           cm->allow_high_precision_mv)
                          .as_int;
#else
      zeromv.as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
      if (frame_mv[NEARMV][ALTREF_FRAME].as_int != zeromv.as_int)
        mode_skip_mask[ALTREF_FRAME] |= (1 << NEARMV);
      if (frame_mv[NEARESTMV][ALTREF_FRAME].as_int != zeromv.as_int)
        mode_skip_mask[ALTREF_FRAME] |= (1 << NEARESTMV);
#if CONFIG_EXT_INTER
      if (frame_mv[NEAREST_NEARESTMV][ALTREF_FRAME].as_int != zeromv.as_int)
        mode_skip_mask[ALTREF_FRAME] |= (1 << NEAREST_NEARESTMV);
      if (frame_mv[NEAREST_NEARMV][ALTREF_FRAME].as_int != zeromv.as_int)
        mode_skip_mask[ALTREF_FRAME] |= (1 << NEAREST_NEARMV);
      if (frame_mv[NEAR_NEARESTMV][ALTREF_FRAME].as_int != zeromv.as_int)
        mode_skip_mask[ALTREF_FRAME] |= (1 << NEAR_NEARESTMV);
      if (frame_mv[NEAR_NEARMV][ALTREF_FRAME].as_int != zeromv.as_int)
        mode_skip_mask[ALTREF_FRAME] |= (1 << NEAR_NEARMV);
#endif  // CONFIG_EXT_INTER
    }
  }

  if (cpi->rc.is_src_frame_alt_ref) {
    if (sf->alt_ref_search_fp) {
      assert(cpi->ref_frame_flags & flag_list[ALTREF_FRAME]);
      mode_skip_mask[ALTREF_FRAME] = 0;
      ref_frame_skip_mask[0] = ~(1 << ALTREF_FRAME);
      ref_frame_skip_mask[1] = SECOND_REF_FRAME_MASK;
    }
  }

  if (sf->alt_ref_search_fp)
    if (!cm->show_frame && x->pred_mv_sad[GOLDEN_FRAME] < INT_MAX)
      if (x->pred_mv_sad[ALTREF_FRAME] > (x->pred_mv_sad[GOLDEN_FRAME] << 1))
        mode_skip_mask[ALTREF_FRAME] |= INTER_ALL;

  if (sf->adaptive_mode_search) {
    if (cm->show_frame && !cpi->rc.is_src_frame_alt_ref &&
        cpi->rc.frames_since_golden >= 3)
      if (x->pred_mv_sad[GOLDEN_FRAME] > (x->pred_mv_sad[LAST_FRAME] << 1))
        mode_skip_mask[GOLDEN_FRAME] |= INTER_ALL;
  }

  if (bsize > sf->max_intra_bsize) {
    ref_frame_skip_mask[0] |= (1 << INTRA_FRAME);
    ref_frame_skip_mask[1] |= (1 << INTRA_FRAME);
  }

  mode_skip_mask[INTRA_FRAME] |=
      ~(sf->intra_y_mode_mask[max_txsize_lookup[bsize]]);

  for (i = 0; i <= LAST_NEW_MV_INDEX; ++i) mode_threshold[i] = 0;
  for (i = LAST_NEW_MV_INDEX + 1; i < MAX_MODES; ++i)
    mode_threshold[i] = ((int64_t)rd_threshes[i] * rd_thresh_freq_fact[i]) >> 5;

  midx = sf->schedule_mode_search ? mode_skip_start : 0;
  while (midx > 4) {
    uint8_t end_pos = 0;
    for (i = 5; i < midx; ++i) {
      if (mode_threshold[mode_map[i - 1]] > mode_threshold[mode_map[i]]) {
        uint8_t tmp = mode_map[i];
        mode_map[i] = mode_map[i - 1];
        mode_map[i - 1] = tmp;
        end_pos = i;
      }
    }
    midx = end_pos;
  }

  if (cpi->sf.tx_type_search.fast_intra_tx_type_search)
    x->use_default_intra_tx_type = 1;
  else
    x->use_default_intra_tx_type = 0;

  if (cpi->sf.tx_type_search.fast_inter_tx_type_search)
    x->use_default_inter_tx_type = 1;
  else
    x->use_default_inter_tx_type = 0;
#if CONFIG_PVQ
  od_encode_checkpoint(&x->daala_enc, &pre_buf);
#endif
#if CONFIG_EXT_INTER
  for (i = 0; i < MB_MODE_COUNT; ++i)
    for (ref_frame = 0; ref_frame < TOTAL_REFS_PER_FRAME; ++ref_frame)
      modelled_rd[i][ref_frame] = INT64_MAX;
#endif  // CONFIG_EXT_INTER

  for (midx = 0; midx < MAX_MODES; ++midx) {
    int mode_index;
    int mode_excluded = 0;
    int64_t this_rd = INT64_MAX;
    int disable_skip = 0;
    int compmode_cost = 0;
#if CONFIG_EXT_INTER
    int compmode_interintra_cost = 0;
    int compmode_interinter_cost = 0;
#endif  // CONFIG_EXT_INTER
    int rate2 = 0, rate_y = 0, rate_uv = 0;
    int64_t distortion2 = 0, distortion_y = 0, distortion_uv = 0;
    int skippable = 0;
    int this_skip2 = 0;
    int64_t total_sse = INT64_MAX;
#if CONFIG_REF_MV
    uint8_t ref_frame_type;
#endif
#if CONFIG_PVQ
    od_encode_rollback(&x->daala_enc, &pre_buf);
#endif
    mode_index = mode_map[midx];
    this_mode = av1_mode_order[mode_index].mode;
    ref_frame = av1_mode_order[mode_index].ref_frame[0];
    second_ref_frame = av1_mode_order[mode_index].ref_frame[1];
#if CONFIG_REF_MV
    mbmi->ref_mv_idx = 0;
#endif

#if CONFIG_EXT_INTER
    if (ref_frame > INTRA_FRAME && second_ref_frame == INTRA_FRAME) {
      // Mode must by compatible
      assert(is_interintra_allowed_mode(this_mode));

#if !USE_RECT_INTERINTRA
      // Note: If the subsampling is unequal, any block size we pick will
      // result in either a rectangular luma block or a rectangular chroma
      // block. So in this case, we can't use any interintra modes.
      if (xd->plane[1].subsampling_x != xd->plane[1].subsampling_y ||
          xd->plane[2].subsampling_x != xd->plane[2].subsampling_y)
        continue;
#endif

      if (!is_interintra_allowed_bsize(bsize)) continue;
    }

    if (is_inter_compound_mode(this_mode)) {
      frame_mv[this_mode][ref_frame].as_int =
          frame_mv[compound_ref0_mode(this_mode)][ref_frame].as_int;
      frame_mv[this_mode][second_ref_frame].as_int =
          frame_mv[compound_ref1_mode(this_mode)][second_ref_frame].as_int;
    }
#endif  // CONFIG_EXT_INTER

    // Look at the reference frame of the best mode so far and set the
    // skip mask to look at a subset of the remaining modes.
    if (midx == mode_skip_start && best_mode_index >= 0) {
      switch (best_mbmode.ref_frame[0]) {
        case INTRA_FRAME: break;
        case LAST_FRAME:
          ref_frame_skip_mask[0] |= LAST_FRAME_MODE_MASK;
          ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
          break;
#if CONFIG_EXT_REFS
        case LAST2_FRAME:
          ref_frame_skip_mask[0] |= LAST2_FRAME_MODE_MASK;
          ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
          break;
        case LAST3_FRAME:
          ref_frame_skip_mask[0] |= LAST3_FRAME_MODE_MASK;
          ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
          break;
#endif  // CONFIG_EXT_REFS
        case GOLDEN_FRAME:
          ref_frame_skip_mask[0] |= GOLDEN_FRAME_MODE_MASK;
          ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
          break;
#if CONFIG_EXT_REFS
        case BWDREF_FRAME:
          ref_frame_skip_mask[0] |= BWDREF_FRAME_MODE_MASK;
          ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
          break;
#endif  // CONFIG_EXT_REFS
        case ALTREF_FRAME: ref_frame_skip_mask[0] |= ALTREF_FRAME_MODE_MASK;
#if CONFIG_EXT_REFS
          ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
#endif  // CONFIG_EXT_REFS
          break;
        case NONE_FRAME:
        case TOTAL_REFS_PER_FRAME:
          assert(0 && "Invalid Reference frame");
          break;
      }
    }

    if ((ref_frame_skip_mask[0] & (1 << ref_frame)) &&
        (ref_frame_skip_mask[1] & (1 << AOMMAX(0, second_ref_frame))))
      continue;

    if (mode_skip_mask[ref_frame] & (1 << this_mode)) continue;

    // Test best rd so far against threshold for trying this mode.
    if (best_mode_skippable && sf->schedule_mode_search)
      mode_threshold[mode_index] <<= 1;

    if (best_rd < mode_threshold[mode_index]) continue;

    comp_pred = second_ref_frame > INTRA_FRAME;
    if (comp_pred) {
      if (!cpi->allow_comp_inter_inter) continue;

      // Skip compound inter modes if ARF is not available.
      if (!(cpi->ref_frame_flags & flag_list[second_ref_frame])) continue;

      // Do not allow compound prediction if the segment level reference frame
      // feature is in use as in this case there can only be one reference.
      if (segfeature_active(seg, segment_id, SEG_LVL_REF_FRAME)) continue;

      if ((mode_search_skip_flags & FLAG_SKIP_COMP_BESTINTRA) &&
          best_mode_index >= 0 && best_mbmode.ref_frame[0] == INTRA_FRAME)
        continue;

      mode_excluded = cm->reference_mode == SINGLE_REFERENCE;
    } else {
      if (ref_frame != INTRA_FRAME)
        mode_excluded = cm->reference_mode == COMPOUND_REFERENCE;
    }

    if (ref_frame == INTRA_FRAME) {
      if (sf->adaptive_mode_search)
        if ((x->source_variance << num_pels_log2_lookup[bsize]) > best_pred_sse)
          continue;

      if (this_mode != DC_PRED) {
        // Disable intra modes other than DC_PRED for blocks with low variance
        // Threshold for intra skipping based on source variance
        // TODO(debargha): Specialize the threshold for super block sizes
        const unsigned int skip_intra_var_thresh = 64;
        if ((mode_search_skip_flags & FLAG_SKIP_INTRA_LOWVAR) &&
            x->source_variance < skip_intra_var_thresh)
          continue;
        // Only search the oblique modes if the best so far is
        // one of the neighboring directional modes
        if ((mode_search_skip_flags & FLAG_SKIP_INTRA_BESTINTER) &&
            (this_mode >= D45_PRED && this_mode <= TM_PRED)) {
          if (best_mode_index >= 0 && best_mbmode.ref_frame[0] > INTRA_FRAME)
            continue;
        }
        if (mode_search_skip_flags & FLAG_SKIP_INTRA_DIRMISMATCH) {
          if (conditional_skipintra(this_mode, best_intra_mode)) continue;
        }
      }
#if CONFIG_GLOBAL_MOTION
    } else if (cm->global_motion[ref_frame].wmtype == IDENTITY &&
               (!comp_pred ||
                cm->global_motion[second_ref_frame].wmtype == IDENTITY)) {
#else   // CONFIG_GLOBAL_MOTION
    } else {
#endif  // CONFIG_GLOBAL_MOTION
      const MV_REFERENCE_FRAME ref_frames[2] = { ref_frame, second_ref_frame };
      if (!check_best_zero_mv(cpi, mbmi_ext->mode_context,
#if CONFIG_REF_MV && CONFIG_EXT_INTER
                              mbmi_ext->compound_mode_context,
#endif  // CONFIG_REF_MV && CONFIG_EXT_INTER
                              frame_mv, this_mode, ref_frames, bsize, -1))
        continue;
    }

    mbmi->mode = this_mode;
    mbmi->uv_mode = DC_PRED;
    mbmi->ref_frame[0] = ref_frame;
    mbmi->ref_frame[1] = second_ref_frame;
#if CONFIG_PALETTE
    pmi->palette_size[0] = 0;
    pmi->palette_size[1] = 0;
#endif  // CONFIG_PALETTE
#if CONFIG_FILTER_INTRA
    mbmi->filter_intra_mode_info.use_filter_intra_mode[0] = 0;
    mbmi->filter_intra_mode_info.use_filter_intra_mode[1] = 0;
#endif  // CONFIG_FILTER_INTRA
        // Evaluate all sub-pel filters irrespective of whether we can use
        // them for this frame.
#if CONFIG_DUAL_FILTER
    for (i = 0; i < 4; ++i) {
      mbmi->interp_filter[i] = cm->interp_filter == SWITCHABLE
                                   ? EIGHTTAP_REGULAR
                                   : cm->interp_filter;
    }
#else
    mbmi->interp_filter =
        cm->interp_filter == SWITCHABLE ? EIGHTTAP_REGULAR : cm->interp_filter;
#endif
    mbmi->mv[0].as_int = mbmi->mv[1].as_int = 0;
    mbmi->motion_mode = SIMPLE_TRANSLATION;

    x->skip = 0;
    set_ref_ptrs(cm, xd, ref_frame, second_ref_frame);

    // Select prediction reference frames.
    for (i = 0; i < MAX_MB_PLANE; i++) {
      xd->plane[i].pre[0] = yv12_mb[ref_frame][i];
      if (comp_pred) xd->plane[i].pre[1] = yv12_mb[second_ref_frame][i];
    }

#if CONFIG_EXT_INTER
    mbmi->interintra_mode = (INTERINTRA_MODE)(II_DC_PRED - 1);
#endif  // CONFIG_EXT_INTER

    if (ref_frame == INTRA_FRAME) {
      RD_STATS rd_stats_y;
      TX_SIZE uv_tx;
      struct macroblockd_plane *const pd = &xd->plane[1];
#if CONFIG_EXT_INTRA
      is_directional_mode = av1_is_directional_mode(mbmi->mode, bsize);
      if (is_directional_mode) {
        int rate_dummy;
        int64_t model_rd = INT64_MAX;
        if (!angle_stats_ready) {
          const int src_stride = x->plane[0].src.stride;
          const uint8_t *src = x->plane[0].src.buf;
#if CONFIG_AOM_HIGHBITDEPTH
          if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)
            highbd_angle_estimation(src, src_stride, rows, cols,
                                    directional_mode_skip_mask);
          else
#endif
            angle_estimation(src, src_stride, rows, cols,
                             directional_mode_skip_mask);
          angle_stats_ready = 1;
        }
        if (directional_mode_skip_mask[mbmi->mode]) continue;
        rd_stats_y.rate = INT_MAX;
        this_rd = rd_pick_intra_angle_sby(cpi, x, &rate_dummy, &rd_stats_y,
                                          bsize, intra_mode_cost[mbmi->mode],
                                          best_rd, &model_rd);
      } else {
        mbmi->angle_delta[0] = 0;
        super_block_yrd(cpi, x, &rd_stats_y, bsize, best_rd);
      }
#else
      super_block_yrd(cpi, x, &rd_stats_y, bsize, best_rd);
#endif  // CONFIG_EXT_INTRA
      rate_y = rd_stats_y.rate;
      distortion_y = rd_stats_y.dist;
      skippable = rd_stats_y.skip;

      if (rate_y == INT_MAX) continue;

#if CONFIG_FILTER_INTRA
      if (mbmi->mode == DC_PRED) dc_skipped = 0;
#endif  // CONFIG_FILTER_INTRA

      uv_tx = uv_txsize_lookup[bsize][mbmi->tx_size][pd->subsampling_x]
                              [pd->subsampling_y];
      if (rate_uv_intra[uv_tx] == INT_MAX) {
        choose_intra_uv_mode(cpi, x, ctx, bsize, uv_tx, &rate_uv_intra[uv_tx],
                             &rate_uv_tokenonly[uv_tx], &dist_uvs[uv_tx],
                             &skip_uvs[uv_tx], &mode_uv[uv_tx]);
#if CONFIG_PALETTE
        if (cm->allow_screen_content_tools) pmi_uv[uv_tx] = *pmi;
#endif  // CONFIG_PALETTE

#if CONFIG_EXT_INTRA
        uv_angle_delta[uv_tx] = mbmi->angle_delta[1];
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
        filter_intra_mode_info_uv[uv_tx] = mbmi->filter_intra_mode_info;
#endif  // CONFIG_FILTER_INTRA
      }

      rate_uv = rate_uv_tokenonly[uv_tx];
      distortion_uv = dist_uvs[uv_tx];
      skippable = skippable && skip_uvs[uv_tx];
      mbmi->uv_mode = mode_uv[uv_tx];
#if CONFIG_PALETTE
      if (cm->allow_screen_content_tools) {
        pmi->palette_size[1] = pmi_uv[uv_tx].palette_size[1];
        memcpy(pmi->palette_colors + PALETTE_MAX_SIZE,
               pmi_uv[uv_tx].palette_colors + PALETTE_MAX_SIZE,
               2 * PALETTE_MAX_SIZE * sizeof(pmi->palette_colors[0]));
      }
#endif  // CONFIG_PALETTE

#if CONFIG_EXT_INTRA
      mbmi->angle_delta[1] = uv_angle_delta[uv_tx];
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
      mbmi->filter_intra_mode_info.use_filter_intra_mode[1] =
          filter_intra_mode_info_uv[uv_tx].use_filter_intra_mode[1];
      if (filter_intra_mode_info_uv[uv_tx].use_filter_intra_mode[1]) {
        mbmi->filter_intra_mode_info.filter_intra_mode[1] =
            filter_intra_mode_info_uv[uv_tx].filter_intra_mode[1];
      }
#endif  // CONFIG_FILTER_INTRA

      rate2 = rate_y + intra_mode_cost[mbmi->mode] + rate_uv +
              cpi->intra_uv_mode_cost[mbmi->mode][mbmi->uv_mode];
#if CONFIG_PALETTE
      if (cpi->common.allow_screen_content_tools && mbmi->mode == DC_PRED)
        rate2 += av1_cost_bit(
            av1_default_palette_y_mode_prob[bsize - BLOCK_8X8][palette_ctx], 0);
#endif  // CONFIG_PALETTE

      if (!xd->lossless[mbmi->segment_id] && bsize >= BLOCK_8X8) {
        // super_block_yrd above includes the cost of the tx_size in the
        // tokenonly rate, but for intra blocks, tx_size is always coded
        // (prediction granularity), so we account for it in the full rate,
        // not the tokenonly rate.
        rate_y -= tx_size_cost(cpi, x, bsize, mbmi->tx_size);
      }
#if CONFIG_EXT_INTRA
      if (is_directional_mode) {
        const int max_angle_delta = av1_get_max_angle_delta(bsize, 0);
#if CONFIG_INTRA_INTERP
        int p_angle;
        const int intra_filter_ctx = av1_get_pred_context_intra_interp(xd);
        p_angle = mode_to_angle_map[mbmi->mode] +
                  mbmi->angle_delta[0] * av1_get_angle_step(bsize, 0);
        if (av1_is_intra_filter_switchable(p_angle))
          rate2 += cpi->intra_filter_cost[intra_filter_ctx][mbmi->intra_filter];
#endif  // CONFIG_INTRA_INTERP
        rate2 += write_uniform_cost(2 * max_angle_delta + 1,
                                    max_angle_delta + mbmi->angle_delta[0]);
      }
      if (mbmi->uv_mode != DC_PRED && mbmi->uv_mode != TM_PRED) {
        rate2 += write_uniform_cost(2 * MAX_ANGLE_DELTA_UV + 1,
                                    MAX_ANGLE_DELTA_UV + mbmi->angle_delta[1]);
      }
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
      if (mbmi->mode == DC_PRED) {
        rate2 +=
            av1_cost_bit(cm->fc->filter_intra_probs[0],
                         mbmi->filter_intra_mode_info.use_filter_intra_mode[0]);
        if (mbmi->filter_intra_mode_info.use_filter_intra_mode[0]) {
          rate2 += write_uniform_cost(
              FILTER_INTRA_MODES,
              mbmi->filter_intra_mode_info.filter_intra_mode[0]);
        }
      }
      if (mbmi->uv_mode == DC_PRED) {
        rate2 +=
            av1_cost_bit(cpi->common.fc->filter_intra_probs[1],
                         mbmi->filter_intra_mode_info.use_filter_intra_mode[1]);
        if (mbmi->filter_intra_mode_info.use_filter_intra_mode[1])
          rate2 += write_uniform_cost(
              FILTER_INTRA_MODES,
              mbmi->filter_intra_mode_info.filter_intra_mode[1]);
      }
#endif  // CONFIG_FILTER_INTRA
      if (this_mode != DC_PRED && this_mode != TM_PRED)
        rate2 += intra_cost_penalty;
      distortion2 = distortion_y + distortion_uv;
#if CONFIG_AOM_HIGHBITDEPTH
      if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
        x->recon_variance = av1_high_get_sby_perpixel_variance(
            cpi, &xd->plane[0].dst, bsize, xd->bd);
      } else {
        x->recon_variance =
            av1_get_sby_perpixel_variance(cpi, &xd->plane[0].dst, bsize);
      }
#else
      x->recon_variance =
          av1_get_sby_perpixel_variance(cpi, &xd->plane[0].dst, bsize);
#endif  // CONFIG_AOM_HIGHBITDEPTH
    } else {
#if CONFIG_REF_MV
      int_mv backup_ref_mv[2];

      backup_ref_mv[0] = mbmi_ext->ref_mvs[ref_frame][0];
      if (comp_pred) backup_ref_mv[1] = mbmi_ext->ref_mvs[second_ref_frame][0];
#endif
#if CONFIG_EXT_INTER
      if (second_ref_frame == INTRA_FRAME) {
        if (best_single_inter_ref != ref_frame) continue;
        mbmi->interintra_mode = intra_to_interintra_mode[best_intra_mode];
// TODO(debargha|geza.lore):
// Should we use ext_intra modes for interintra?
#if CONFIG_EXT_INTRA
        mbmi->angle_delta[0] = 0;
        mbmi->angle_delta[1] = 0;
#if CONFIG_INTRA_INTERP
        mbmi->intra_filter = INTRA_FILTER_LINEAR;
#endif  // CONFIG_INTRA_INTERP
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
        mbmi->filter_intra_mode_info.use_filter_intra_mode[0] = 0;
        mbmi->filter_intra_mode_info.use_filter_intra_mode[1] = 0;
#endif  // CONFIG_FILTER_INTRA
      }
#endif  // CONFIG_EXT_INTER
#if CONFIG_REF_MV
      mbmi->ref_mv_idx = 0;
      ref_frame_type = av1_ref_frame_type(mbmi->ref_frame);

      if (this_mode == NEWMV && mbmi_ext->ref_mv_count[ref_frame_type] > 1) {
        int ref;
        for (ref = 0; ref < 1 + comp_pred; ++ref) {
          int_mv this_mv =
              (ref == 0) ? mbmi_ext->ref_mv_stack[ref_frame_type][0].this_mv
                         : mbmi_ext->ref_mv_stack[ref_frame_type][0].comp_mv;
          clamp_mv_ref(&this_mv.as_mv, xd->n8_w << MI_SIZE_LOG2,
                       xd->n8_h << MI_SIZE_LOG2, xd);
          mbmi_ext->ref_mvs[mbmi->ref_frame[ref]][0] = this_mv;
        }
      }
#endif
      {
        RD_STATS rd_stats, rd_stats_y, rd_stats_uv;
        av1_init_rd_stats(&rd_stats);
        rd_stats.rate = rate2;
        this_rd = handle_inter_mode(
            cpi, x, bsize, &rd_stats, &rd_stats_y, &rd_stats_uv, &disable_skip,
            frame_mv, mi_row, mi_col,
#if CONFIG_MOTION_VAR
            dst_buf1, dst_stride1, dst_buf2, dst_stride2,
#endif  // CONFIG_MOTION_VAR
#if CONFIG_EXT_INTER
            single_newmvs, single_newmvs_rate, &compmode_interintra_cost,
            &compmode_interinter_cost, modelled_rd,
#else
            single_newmv,
#endif  // CONFIG_EXT_INTER
            single_inter_filter, single_skippable, best_rd);

        rate2 = rd_stats.rate;
        skippable = rd_stats.skip;
        distortion2 = rd_stats.dist;
        total_sse = rd_stats.sse;
        rate_y = rd_stats_y.rate;
        rate_uv = rd_stats_uv.rate;
      }

#if CONFIG_REF_MV
// TODO(jingning): This needs some refactoring to improve code quality
// and reduce redundant steps.
#if CONFIG_EXT_INTER
      if (((mbmi->mode == NEARMV || mbmi->mode == NEAR_NEARMV) &&
           mbmi_ext->ref_mv_count[ref_frame_type] > 2) ||
          ((mbmi->mode == NEWMV || mbmi->mode == NEW_NEWMV) &&
           mbmi_ext->ref_mv_count[ref_frame_type] > 1)) {
#else
      if ((mbmi->mode == NEARMV &&
           mbmi_ext->ref_mv_count[ref_frame_type] > 2) ||
          (mbmi->mode == NEWMV && mbmi_ext->ref_mv_count[ref_frame_type] > 1)) {
#endif  // CONFIG_EXT_INTER
        int_mv backup_mv = frame_mv[NEARMV][ref_frame];
        MB_MODE_INFO backup_mbmi = *mbmi;
        int backup_skip = x->skip;
        int64_t tmp_ref_rd = this_rd;
        int ref_idx;

// TODO(jingning): This should be deprecated shortly.
#if CONFIG_EXT_INTER
        int idx_offset =
            (mbmi->mode == NEARMV || mbmi->mode == NEAR_NEARMV) ? 1 : 0;
#else
        int idx_offset = (mbmi->mode == NEARMV) ? 1 : 0;
#endif
        int ref_set =
            AOMMIN(2, mbmi_ext->ref_mv_count[ref_frame_type] - 1 - idx_offset);

        uint8_t drl_ctx =
            av1_drl_ctx(mbmi_ext->ref_mv_stack[ref_frame_type], idx_offset);
        // Dummy
        int_mv backup_fmv[2];
        backup_fmv[0] = frame_mv[NEWMV][ref_frame];
        if (comp_pred) backup_fmv[1] = frame_mv[NEWMV][second_ref_frame];

        rate2 += (rate2 < INT_MAX ? cpi->drl_mode_cost0[drl_ctx][0] : 0);

        if (this_rd < INT64_MAX) {
          if (RDCOST(x->rdmult, x->rddiv, rate_y + rate_uv, distortion2) <
              RDCOST(x->rdmult, x->rddiv, 0, total_sse))
            tmp_ref_rd =
                RDCOST(x->rdmult, x->rddiv,
                       rate2 + av1_cost_bit(av1_get_skip_prob(cm, xd), 0),
                       distortion2);
          else
            tmp_ref_rd =
                RDCOST(x->rdmult, x->rddiv,
                       rate2 + av1_cost_bit(av1_get_skip_prob(cm, xd), 1) -
                           rate_y - rate_uv,
                       total_sse);
        }
#if CONFIG_VAR_TX
        for (i = 0; i < MAX_MB_PLANE; ++i)
          memcpy(x->blk_skip_drl[i], x->blk_skip[i],
                 sizeof(uint8_t) * ctx->num_4x4_blk);
#endif

        for (ref_idx = 0; ref_idx < ref_set; ++ref_idx) {
          int64_t tmp_alt_rd = INT64_MAX;
          int dummy_disable_skip = 0;
          int ref;
          int_mv cur_mv;
          RD_STATS tmp_rd_stats, tmp_rd_stats_y, tmp_rd_stats_uv;
#if CONFIG_EXT_INTER
          int tmp_compmode_interintra_cost = 0;
          int tmp_compmode_interinter_cost = 0;
#endif  // CONFIG_EXT_INTER

          av1_invalid_rd_stats(&tmp_rd_stats);

          mbmi->ref_mv_idx = 1 + ref_idx;

          for (ref = 0; ref < 1 + comp_pred; ++ref) {
            int_mv this_mv =
                (ref == 0)
                    ? mbmi_ext->ref_mv_stack[ref_frame_type][mbmi->ref_mv_idx]
                          .this_mv
                    : mbmi_ext->ref_mv_stack[ref_frame_type][mbmi->ref_mv_idx]
                          .comp_mv;
            clamp_mv_ref(&this_mv.as_mv, xd->n8_w << MI_SIZE_LOG2,
                         xd->n8_h << MI_SIZE_LOG2, xd);
            mbmi_ext->ref_mvs[mbmi->ref_frame[ref]][0] = this_mv;
          }

          cur_mv =
              mbmi_ext->ref_mv_stack[ref_frame][mbmi->ref_mv_idx + idx_offset]
                  .this_mv;
          clamp_mv2(&cur_mv.as_mv, xd);

          if (!mv_check_bounds(x, &cur_mv.as_mv)) {
            int dummy_single_skippable[MB_MODE_COUNT][TOTAL_REFS_PER_FRAME] = {
              { 0 }
            };
#if CONFIG_EXT_INTER
            int_mv dummy_single_newmvs[2][TOTAL_REFS_PER_FRAME] = { { { 0 } },
                                                                    { { 0 } } };
            int dummy_single_newmvs_rate[2][TOTAL_REFS_PER_FRAME] = { { 0 },
                                                                      { 0 } };
#else
            int_mv dummy_single_newmv[TOTAL_REFS_PER_FRAME] = { { 0 } };
#endif

            frame_mv[NEARMV][ref_frame] = cur_mv;
            av1_init_rd_stats(&tmp_rd_stats);
            tmp_alt_rd = handle_inter_mode(
                cpi, x, bsize, &tmp_rd_stats, &tmp_rd_stats_y, &tmp_rd_stats_uv,
                &dummy_disable_skip, frame_mv, mi_row, mi_col,
#if CONFIG_MOTION_VAR
                dst_buf1, dst_stride1, dst_buf2, dst_stride2,
#endif  // CONFIG_MOTION_VAR
#if CONFIG_EXT_INTER
                dummy_single_newmvs, dummy_single_newmvs_rate,
                &tmp_compmode_interintra_cost, &tmp_compmode_interinter_cost,
                NULL,
#else
                dummy_single_newmv,
#endif
                single_inter_filter, dummy_single_skippable, best_rd);
          }

          for (i = 0; i < mbmi->ref_mv_idx; ++i) {
            uint8_t drl1_ctx = 0;
            drl1_ctx = av1_drl_ctx(mbmi_ext->ref_mv_stack[ref_frame_type],
                                   i + idx_offset);
            tmp_rd_stats.rate +=
                (tmp_rd_stats.rate < INT_MAX ? cpi->drl_mode_cost0[drl1_ctx][1]
                                             : 0);
          }

          if (mbmi_ext->ref_mv_count[ref_frame_type] >
                  mbmi->ref_mv_idx + idx_offset + 1 &&
              ref_idx < ref_set - 1) {
            uint8_t drl1_ctx =
                av1_drl_ctx(mbmi_ext->ref_mv_stack[ref_frame_type],
                            mbmi->ref_mv_idx + idx_offset);
            tmp_rd_stats.rate +=
                (tmp_rd_stats.rate < INT_MAX ? cpi->drl_mode_cost0[drl1_ctx][0]
                                             : 0);
          }

          if (tmp_alt_rd < INT64_MAX) {
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
            tmp_alt_rd = RDCOST(x->rdmult, x->rddiv, tmp_rd_stats.rate,
                                tmp_rd_stats.dist);
#else
            if (RDCOST(x->rdmult, x->rddiv,
                       tmp_rd_stats_y.rate + tmp_rd_stats_uv.rate,
                       tmp_rd_stats.dist) <
                RDCOST(x->rdmult, x->rddiv, 0, tmp_rd_stats.sse))
              tmp_alt_rd =
                  RDCOST(x->rdmult, x->rddiv,
                         tmp_rd_stats.rate +
                             av1_cost_bit(av1_get_skip_prob(cm, xd), 0),
                         tmp_rd_stats.dist);
            else
              tmp_alt_rd =
                  RDCOST(x->rdmult, x->rddiv,
                         tmp_rd_stats.rate +
                             av1_cost_bit(av1_get_skip_prob(cm, xd), 1) -
                             tmp_rd_stats_y.rate - tmp_rd_stats_uv.rate,
                         tmp_rd_stats.sse);
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
          }

          if (tmp_ref_rd > tmp_alt_rd) {
            rate2 = tmp_rd_stats.rate;
            disable_skip = dummy_disable_skip;
            distortion2 = tmp_rd_stats.dist;
            skippable = tmp_rd_stats.skip;
            rate_y = tmp_rd_stats_y.rate;
            rate_uv = tmp_rd_stats_uv.rate;
            total_sse = tmp_rd_stats.sse;
            this_rd = tmp_alt_rd;
            tmp_ref_rd = tmp_alt_rd;
            backup_mbmi = *mbmi;
            backup_skip = x->skip;
#if CONFIG_VAR_TX
            for (i = 0; i < MAX_MB_PLANE; ++i)
              memcpy(x->blk_skip_drl[i], x->blk_skip[i],
                     sizeof(uint8_t) * ctx->num_4x4_blk);
#endif
#if CONFIG_EXT_INTER
            compmode_interintra_cost = tmp_compmode_interintra_cost;
            compmode_interinter_cost = tmp_compmode_interinter_cost;
#endif
          } else {
            *mbmi = backup_mbmi;
            x->skip = backup_skip;
          }
        }

        frame_mv[NEARMV][ref_frame] = backup_mv;
        frame_mv[NEWMV][ref_frame] = backup_fmv[0];
        if (comp_pred) frame_mv[NEWMV][second_ref_frame] = backup_fmv[1];
#if CONFIG_VAR_TX
        for (i = 0; i < MAX_MB_PLANE; ++i)
          memcpy(x->blk_skip[i], x->blk_skip_drl[i],
                 sizeof(uint8_t) * ctx->num_4x4_blk);
#endif
      }
      mbmi_ext->ref_mvs[ref_frame][0] = backup_ref_mv[0];
      if (comp_pred) mbmi_ext->ref_mvs[second_ref_frame][0] = backup_ref_mv[1];
#endif  // CONFIG_REF_MV

      if (this_rd == INT64_MAX) continue;

      compmode_cost = av1_cost_bit(comp_mode_p, comp_pred);

      if (cm->reference_mode == REFERENCE_MODE_SELECT) rate2 += compmode_cost;
    }

#if CONFIG_EXT_INTER
    rate2 += compmode_interintra_cost;
    if (cm->reference_mode != SINGLE_REFERENCE && comp_pred)
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
      if (mbmi->motion_mode == SIMPLE_TRANSLATION)
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
        rate2 += compmode_interinter_cost;
#endif  // CONFIG_EXT_INTER

    // Estimate the reference frame signaling cost and add it
    // to the rolling cost variable.
    if (comp_pred) {
      rate2 += ref_costs_comp[ref_frame];
#if CONFIG_EXT_REFS
      rate2 += ref_costs_comp[second_ref_frame];
#endif  // CONFIG_EXT_REFS
    } else {
      rate2 += ref_costs_single[ref_frame];
    }

#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
    if (ref_frame == INTRA_FRAME) {
#else
    if (!disable_skip) {
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
      if (skippable) {
        // Back out the coefficient coding costs
        rate2 -= (rate_y + rate_uv);
        rate_y = 0;
        rate_uv = 0;
        // Cost the skip mb case
        rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
      } else if (ref_frame != INTRA_FRAME && !xd->lossless[mbmi->segment_id]) {
#if CONFIG_REF_MV
        if (RDCOST(x->rdmult, x->rddiv, rate_y + rate_uv + rate_skip0,
                   distortion2) <
            RDCOST(x->rdmult, x->rddiv, rate_skip1, total_sse)) {
#else
        if (RDCOST(x->rdmult, x->rddiv, rate_y + rate_uv, distortion2) <
            RDCOST(x->rdmult, x->rddiv, 0, total_sse)) {
#endif
          // Add in the cost of the no skip flag.
          rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
        } else {
          // FIXME(rbultje) make this work for splitmv also
          rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
          distortion2 = total_sse;
          assert(total_sse >= 0);
          rate2 -= (rate_y + rate_uv);
          this_skip2 = 1;
          rate_y = 0;
          rate_uv = 0;
        }
      } else {
        // Add in the cost of the no skip flag.
        rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
      }

      // Calculate the final RD estimate for this mode.
      this_rd = RDCOST(x->rdmult, x->rddiv, rate2, distortion2);
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
    } else {
      this_skip2 = mbmi->skip;
      this_rd = RDCOST(x->rdmult, x->rddiv, rate2, distortion2);
      if (this_skip2) {
        rate_y = 0;
        rate_uv = 0;
      }
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
    }

    if (ref_frame == INTRA_FRAME) {
      // Keep record of best intra rd
      if (this_rd < best_intra_rd) {
        best_intra_rd = this_rd;
        best_intra_mode = mbmi->mode;
      }
#if CONFIG_EXT_INTER
    } else if (second_ref_frame == NONE_FRAME) {
      if (this_rd < best_single_inter_rd) {
        best_single_inter_rd = this_rd;
        best_single_inter_ref = mbmi->ref_frame[0];
      }
#endif  // CONFIG_EXT_INTER
    }

    if (!disable_skip && ref_frame == INTRA_FRAME) {
      for (i = 0; i < REFERENCE_MODES; ++i)
        best_pred_rd[i] = AOMMIN(best_pred_rd[i], this_rd);
    }

    // Did this mode help.. i.e. is it the new best mode
    if (this_rd < best_rd || x->skip) {
      if (!mode_excluded) {
        // Note index of best mode so far
        best_mode_index = mode_index;

        if (ref_frame == INTRA_FRAME) {
          /* required for left and above block mv */
          mbmi->mv[0].as_int = 0;
        } else {
          best_pred_sse = x->pred_sse[ref_frame];
        }

        rd_cost->rate = rate2;
#if CONFIG_SUPERTX
        if (x->skip)
          *returnrate_nocoef = rate2;
        else
          *returnrate_nocoef = rate2 - rate_y - rate_uv;
        *returnrate_nocoef -= av1_cost_bit(
            av1_get_skip_prob(cm, xd), disable_skip || skippable || this_skip2);
        *returnrate_nocoef -= av1_cost_bit(av1_get_intra_inter_prob(cm, xd),
                                           mbmi->ref_frame[0] != INTRA_FRAME);
#if CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
#if CONFIG_MOTION_VAR && CONFIG_WARPED_MOTION
        if (motion_mode_allowed(mbmi) == WARPED_CAUSAL)
#endif  // CONFIG_MOTION_VAR && CONFIG_WARPED_MOTION
          *returnrate_nocoef -= cpi->motion_mode_cost[bsize][mbmi->motion_mode];
#if CONFIG_MOTION_VAR && CONFIG_WARPED_MOTION
        else if (motion_mode_allowed(mbmi) == OBMC_CAUSAL)
          *returnrate_nocoef -=
              cpi->motion_mode_cost1[bsize][mbmi->motion_mode];
#endif  // CONFIG_MOTION_VAR && CONFIG_WARPED_MOTION
#endif  // CONFIG_MOTION_VAR || CONFIG_WARPED_MOTION
#endif  // CONFIG_SUPERTX
        rd_cost->dist = distortion2;
        rd_cost->rdcost = this_rd;
        best_rd = this_rd;
        best_mbmode = *mbmi;
        best_skip2 = this_skip2;
        best_mode_skippable = skippable;
        best_rate_y = rate_y + av1_cost_bit(av1_get_skip_prob(cm, xd),
                                            this_skip2 || skippable);
        best_rate_uv = rate_uv;

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

    /* keep record of best compound/single-only prediction */
    if (!disable_skip && ref_frame != INTRA_FRAME) {
      int64_t single_rd, hybrid_rd, single_rate, hybrid_rate;

      if (cm->reference_mode == REFERENCE_MODE_SELECT) {
        single_rate = rate2 - compmode_cost;
        hybrid_rate = rate2;
      } else {
        single_rate = rate2;
        hybrid_rate = rate2 + compmode_cost;
      }

      single_rd = RDCOST(x->rdmult, x->rddiv, single_rate, distortion2);
      hybrid_rd = RDCOST(x->rdmult, x->rddiv, hybrid_rate, distortion2);

      if (!comp_pred) {
        if (single_rd < best_pred_rd[SINGLE_REFERENCE])
          best_pred_rd[SINGLE_REFERENCE] = single_rd;
      } else {
        if (single_rd < best_pred_rd[COMPOUND_REFERENCE])
          best_pred_rd[COMPOUND_REFERENCE] = single_rd;
      }
      if (hybrid_rd < best_pred_rd[REFERENCE_MODE_SELECT])
        best_pred_rd[REFERENCE_MODE_SELECT] = hybrid_rd;
    }

    if (x->skip && !comp_pred) break;
  }

  if (xd->lossless[mbmi->segment_id] == 0 && best_mode_index >= 0 &&
      ((sf->tx_type_search.fast_inter_tx_type_search == 1 &&
        is_inter_mode(best_mbmode.mode)) ||
       (sf->tx_type_search.fast_intra_tx_type_search == 1 &&
        !is_inter_mode(best_mbmode.mode)))) {
    int skip_blk = 0;
    RD_STATS rd_stats_y, rd_stats_uv;

    x->use_default_inter_tx_type = 0;
    x->use_default_intra_tx_type = 0;

    *mbmi = best_mbmode;

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

    // Select prediction reference frames.
    for (i = 0; i < MAX_MB_PLANE; i++) {
      xd->plane[i].pre[0] = yv12_mb[mbmi->ref_frame[0]][i];
      if (has_second_ref(mbmi))
        xd->plane[i].pre[1] = yv12_mb[mbmi->ref_frame[1]][i];
    }

    if (is_inter_mode(mbmi->mode)) {
#if CONFIG_WARPED_MOTION
      if (mbmi->motion_mode == WARPED_CAUSAL) {
        int plane;
#if CONFIG_AOM_HIGHBITDEPTH
        int use_hbd = xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH;
#endif  // CONFIG_AOM_HIGHBITDEPTH
        assert(!has_second_ref(mbmi));

        for (plane = 0; plane < 3; ++plane) {
          const struct macroblockd_plane *pd = &xd->plane[plane];

          av1_warp_plane(&mbmi->wm_params[0],
#if CONFIG_AOM_HIGHBITDEPTH
                         xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH, xd->bd,
#endif  // CONFIG_AOM_HIGHBITDEPTH
                         pd->pre[0].buf0, pd->pre[0].width, pd->pre[0].height,
                         pd->pre[0].stride, pd->dst.buf,
                         ((mi_col * MI_SIZE) >> pd->subsampling_x),
                         ((mi_row * MI_SIZE) >> pd->subsampling_y),
                         xd->n8_w * (MI_SIZE >> pd->subsampling_x),
                         xd->n8_h * (MI_SIZE >> pd->subsampling_y),
                         pd->dst.stride, pd->subsampling_x, pd->subsampling_y,
                         16, 16, 0);
        }
      } else {
#endif  // CONFIG_WARPED_MOTION
        av1_build_inter_predictors_sb(xd, mi_row, mi_col, NULL, bsize);
#if CONFIG_WARPED_MOTION
      }
#endif  // CONFIG_WARPED_MOTION
#if CONFIG_MOTION_VAR
      if (mbmi->motion_mode == OBMC_CAUSAL)
        av1_build_obmc_inter_prediction(cm, xd, mi_row, mi_col, dst_buf1,
                                        dst_stride1, dst_buf2, dst_stride2);
#endif  // CONFIG_MOTION_VAR
      av1_subtract_plane(x, bsize, 0);
#if CONFIG_VAR_TX
      if (cm->tx_mode == TX_MODE_SELECT || xd->lossless[mbmi->segment_id]) {
        select_tx_type_yrd(cpi, x, &rd_stats_y, bsize, INT64_MAX);
      } else {
        int idx, idy;
        super_block_yrd(cpi, x, &rd_stats_y, bsize, INT64_MAX);
        for (idy = 0; idy < xd->n8_h; ++idy)
          for (idx = 0; idx < xd->n8_w; ++idx)
            mbmi->inter_tx_size[idy][idx] = mbmi->tx_size;
        memset(x->blk_skip[0], rd_stats_y.skip,
               sizeof(uint8_t) * xd->n8_h * xd->n8_w * 4);
      }

      inter_block_uvrd(cpi, x, &rd_stats_uv, bsize, INT64_MAX);
#else
      super_block_yrd(cpi, x, &rd_stats_y, bsize, INT64_MAX);
      super_block_uvrd(cpi, x, &rd_stats_uv, bsize, INT64_MAX);
#endif  // CONFIG_VAR_TX
    } else {
      super_block_yrd(cpi, x, &rd_stats_y, bsize, INT64_MAX);
      super_block_uvrd(cpi, x, &rd_stats_uv, bsize, INT64_MAX);
    }

    if (RDCOST(x->rdmult, x->rddiv, rd_stats_y.rate + rd_stats_uv.rate,
               (rd_stats_y.dist + rd_stats_uv.dist)) >
        RDCOST(x->rdmult, x->rddiv, 0, (rd_stats_y.sse + rd_stats_uv.sse))) {
      skip_blk = 1;
      rd_stats_y.rate = av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
      rd_stats_uv.rate = 0;
      rd_stats_y.dist = rd_stats_y.sse;
      rd_stats_uv.dist = rd_stats_uv.sse;
    } else {
      skip_blk = 0;
      rd_stats_y.rate += av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
    }

    if (RDCOST(x->rdmult, x->rddiv, best_rate_y + best_rate_uv, rd_cost->dist) >
        RDCOST(x->rdmult, x->rddiv, rd_stats_y.rate + rd_stats_uv.rate,
               (rd_stats_y.dist + rd_stats_uv.dist))) {
#if CONFIG_VAR_TX
      int idx, idy;
#endif
      best_mbmode.tx_type = mbmi->tx_type;
      best_mbmode.tx_size = mbmi->tx_size;
#if CONFIG_VAR_TX
      for (idy = 0; idy < xd->n8_h; ++idy)
        for (idx = 0; idx < xd->n8_w; ++idx)
          best_mbmode.inter_tx_size[idy][idx] = mbmi->inter_tx_size[idy][idx];

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

      best_mbmode.min_tx_size = mbmi->min_tx_size;
#endif
      rd_cost->rate +=
          (rd_stats_y.rate + rd_stats_uv.rate - best_rate_y - best_rate_uv);
      rd_cost->dist = rd_stats_y.dist + rd_stats_uv.dist;
      rd_cost->rdcost =
          RDCOST(x->rdmult, x->rddiv, rd_cost->rate, rd_cost->dist);
      best_skip2 = skip_blk;
    }
  }

#if CONFIG_PALETTE
  // Only try palette mode when the best mode so far is an intra mode.
  if (cm->allow_screen_content_tools && !is_inter_mode(best_mbmode.mode)) {
    int rate2 = 0;
#if CONFIG_SUPERTX
    int best_rate_nocoef;
#endif
    int64_t distortion2 = 0, best_rd_palette = best_rd, this_rd,
            best_model_rd_palette = INT64_MAX;
    int skippable = 0, rate_overhead_palette = 0;
    RD_STATS rd_stats_y;
    TX_SIZE uv_tx;
    uint8_t *const best_palette_color_map =
        x->palette_buffer->best_palette_color_map;
    uint8_t *const color_map = xd->plane[0].color_index_map;
    MB_MODE_INFO best_mbmi_palette = best_mbmode;

    mbmi->mode = DC_PRED;
    mbmi->uv_mode = DC_PRED;
    mbmi->ref_frame[0] = INTRA_FRAME;
    mbmi->ref_frame[1] = NONE_FRAME;
    rate_overhead_palette = rd_pick_palette_intra_sby(
        cpi, x, bsize, palette_ctx, intra_mode_cost[DC_PRED],
        &best_mbmi_palette, best_palette_color_map, &best_rd_palette,
        &best_model_rd_palette, NULL, NULL, NULL, NULL);
    if (pmi->palette_size[0] == 0) goto PALETTE_EXIT;
    memcpy(color_map, best_palette_color_map,
           rows * cols * sizeof(best_palette_color_map[0]));
    super_block_yrd(cpi, x, &rd_stats_y, bsize, best_rd);
    if (rd_stats_y.rate == INT_MAX) goto PALETTE_EXIT;
    uv_tx = uv_txsize_lookup[bsize][mbmi->tx_size][xd->plane[1].subsampling_x]
                            [xd->plane[1].subsampling_y];
    if (rate_uv_intra[uv_tx] == INT_MAX) {
      choose_intra_uv_mode(cpi, x, ctx, bsize, uv_tx, &rate_uv_intra[uv_tx],
                           &rate_uv_tokenonly[uv_tx], &dist_uvs[uv_tx],
                           &skip_uvs[uv_tx], &mode_uv[uv_tx]);
      pmi_uv[uv_tx] = *pmi;
#if CONFIG_EXT_INTRA
      uv_angle_delta[uv_tx] = mbmi->angle_delta[1];
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
      filter_intra_mode_info_uv[uv_tx] = mbmi->filter_intra_mode_info;
#endif  // CONFIG_FILTER_INTRA
    }
    mbmi->uv_mode = mode_uv[uv_tx];
    pmi->palette_size[1] = pmi_uv[uv_tx].palette_size[1];
    if (pmi->palette_size[1] > 0) {
      memcpy(pmi->palette_colors + PALETTE_MAX_SIZE,
             pmi_uv[uv_tx].palette_colors + PALETTE_MAX_SIZE,
             2 * PALETTE_MAX_SIZE * sizeof(pmi->palette_colors[0]));
    }
#if CONFIG_EXT_INTRA
    mbmi->angle_delta[1] = uv_angle_delta[uv_tx];
#endif  // CONFIG_EXT_INTRA
#if CONFIG_FILTER_INTRA
    mbmi->filter_intra_mode_info.use_filter_intra_mode[1] =
        filter_intra_mode_info_uv[uv_tx].use_filter_intra_mode[1];
    if (filter_intra_mode_info_uv[uv_tx].use_filter_intra_mode[1]) {
      mbmi->filter_intra_mode_info.filter_intra_mode[1] =
          filter_intra_mode_info_uv[uv_tx].filter_intra_mode[1];
    }
#endif  // CONFIG_FILTER_INTRA
    skippable = rd_stats_y.skip && skip_uvs[uv_tx];
    distortion2 = rd_stats_y.dist + dist_uvs[uv_tx];
    rate2 = rd_stats_y.rate + rate_overhead_palette + rate_uv_intra[uv_tx];
    rate2 += ref_costs_single[INTRA_FRAME];

    if (skippable) {
      rate2 -= (rd_stats_y.rate + rate_uv_tokenonly[uv_tx]);
#if CONFIG_SUPERTX
      best_rate_nocoef = rate2;
#endif
      rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
    } else {
#if CONFIG_SUPERTX
      best_rate_nocoef = rate2 - (rd_stats_y.rate + rate_uv_tokenonly[uv_tx]);
#endif
      rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
    }
    this_rd = RDCOST(x->rdmult, x->rddiv, rate2, distortion2);
    if (this_rd < best_rd) {
      best_mode_index = 3;
      mbmi->mv[0].as_int = 0;
      rd_cost->rate = rate2;
#if CONFIG_SUPERTX
      *returnrate_nocoef = best_rate_nocoef;
#endif
      rd_cost->dist = distortion2;
      rd_cost->rdcost = this_rd;
      best_rd = this_rd;
      best_mbmode = *mbmi;
      best_skip2 = 0;
      best_mode_skippable = skippable;
    }
  }
PALETTE_EXIT:
#endif  // CONFIG_PALETTE

#if CONFIG_FILTER_INTRA
  // TODO(huisu): filter-intra is turned off in lossless mode for now to
  // avoid a unit test failure
  if (!xd->lossless[mbmi->segment_id] &&
#if CONFIG_PALETTE
      pmi->palette_size[0] == 0 &&
#endif  // CONFIG_PALETTE
      !dc_skipped && best_mode_index >= 0 &&
      best_intra_rd < (best_rd + (best_rd >> 3))) {
    pick_filter_intra_interframe(
        cpi, x, ctx, bsize, rate_uv_intra, rate_uv_tokenonly, dist_uvs,
        skip_uvs, mode_uv, filter_intra_mode_info_uv,
#if CONFIG_EXT_INTRA
        uv_angle_delta,
#endif  // CONFIG_EXT_INTRA
#if CONFIG_PALETTE
        pmi_uv, palette_ctx,
#endif  // CONFIG_PALETTE
        0, ref_costs_single, &best_rd, &best_intra_rd, &best_intra_mode,
        &best_mode_index, &best_skip2, &best_mode_skippable,
#if CONFIG_SUPERTX
        returnrate_nocoef,
#endif  // CONFIG_SUPERTX
        best_pred_rd, &best_mbmode, rd_cost);
  }
#endif  // CONFIG_FILTER_INTRA

  // The inter modes' rate costs are not calculated precisely in some cases.
  // Therefore, sometimes, NEWMV is chosen instead of NEARESTMV, NEARMV, and
  // ZEROMV. Here, checks are added for those cases, and the mode decisions
  // are corrected.
  if (best_mbmode.mode == NEWMV
#if CONFIG_EXT_INTER
      || best_mbmode.mode == NEWFROMNEARMV || best_mbmode.mode == NEW_NEWMV
#endif  // CONFIG_EXT_INTER
      ) {
    const MV_REFERENCE_FRAME refs[2] = { best_mbmode.ref_frame[0],
                                         best_mbmode.ref_frame[1] };
    int comp_pred_mode = refs[1] > INTRA_FRAME;
    int_mv zeromv[2];
#if CONFIG_REF_MV
    const uint8_t rf_type = av1_ref_frame_type(best_mbmode.ref_frame);
#endif  // CONFIG_REF_MV
#if CONFIG_GLOBAL_MOTION
    zeromv[0].as_int = gm_get_motion_vector(&cm->global_motion[refs[0]],
                                            cm->allow_high_precision_mv)
                           .as_int;
    zeromv[1].as_int = comp_pred_mode
                           ? gm_get_motion_vector(&cm->global_motion[refs[1]],
                                                  cm->allow_high_precision_mv)
                                 .as_int
                           : 0;
#else
    zeromv[0].as_int = 0;
    zeromv[1].as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
#if CONFIG_REF_MV
    if (!comp_pred_mode) {
      int ref_set = (mbmi_ext->ref_mv_count[rf_type] >= 2)
                        ? AOMMIN(2, mbmi_ext->ref_mv_count[rf_type] - 2)
                        : INT_MAX;

      for (i = 0; i <= ref_set && ref_set != INT_MAX; ++i) {
        int_mv cur_mv = mbmi_ext->ref_mv_stack[rf_type][i + 1].this_mv;
        if (cur_mv.as_int == best_mbmode.mv[0].as_int) {
          best_mbmode.mode = NEARMV;
          best_mbmode.ref_mv_idx = i;
        }
      }

      if (frame_mv[NEARESTMV][refs[0]].as_int == best_mbmode.mv[0].as_int)
        best_mbmode.mode = NEARESTMV;
      else if (best_mbmode.mv[0].as_int == zeromv[0].as_int)
        best_mbmode.mode = ZEROMV;
    } else {
      int_mv nearestmv[2];
      int_mv nearmv[2];

#if CONFIG_EXT_INTER
      if (mbmi_ext->ref_mv_count[rf_type] > 1) {
        nearmv[0] = mbmi_ext->ref_mv_stack[rf_type][1].this_mv;
        nearmv[1] = mbmi_ext->ref_mv_stack[rf_type][1].comp_mv;
      } else {
        nearmv[0] = frame_mv[NEARMV][refs[0]];
        nearmv[1] = frame_mv[NEARMV][refs[1]];
      }
#else
      int ref_set = (mbmi_ext->ref_mv_count[rf_type] >= 2)
                        ? AOMMIN(2, mbmi_ext->ref_mv_count[rf_type] - 2)
                        : INT_MAX;

      for (i = 0; i <= ref_set && ref_set != INT_MAX; ++i) {
        nearmv[0] = mbmi_ext->ref_mv_stack[rf_type][i + 1].this_mv;
        nearmv[1] = mbmi_ext->ref_mv_stack[rf_type][i + 1].comp_mv;

        if (nearmv[0].as_int == best_mbmode.mv[0].as_int &&
            nearmv[1].as_int == best_mbmode.mv[1].as_int) {
          best_mbmode.mode = NEARMV;
          best_mbmode.ref_mv_idx = i;
        }
      }
#endif
      if (mbmi_ext->ref_mv_count[rf_type] >= 1) {
        nearestmv[0] = mbmi_ext->ref_mv_stack[rf_type][0].this_mv;
        nearestmv[1] = mbmi_ext->ref_mv_stack[rf_type][0].comp_mv;
      } else {
        nearestmv[0] = frame_mv[NEARESTMV][refs[0]];
        nearestmv[1] = frame_mv[NEARESTMV][refs[1]];
      }

      if (nearestmv[0].as_int == best_mbmode.mv[0].as_int &&
          nearestmv[1].as_int == best_mbmode.mv[1].as_int)
#if CONFIG_EXT_INTER
        best_mbmode.mode = NEAREST_NEARESTMV;
      else if (nearestmv[0].as_int == best_mbmode.mv[0].as_int &&
               nearmv[1].as_int == best_mbmode.mv[1].as_int)
        best_mbmode.mode = NEAREST_NEARMV;
      else if (nearmv[0].as_int == best_mbmode.mv[0].as_int &&
               nearestmv[1].as_int == best_mbmode.mv[1].as_int)
        best_mbmode.mode = NEAR_NEARESTMV;
      else if (nearmv[0].as_int == best_mbmode.mv[0].as_int &&
               nearmv[1].as_int == best_mbmode.mv[1].as_int)
        best_mbmode.mode = NEAR_NEARMV;
      else if (best_mbmode.mv[0].as_int == zeromv[0].as_int &&
               best_mbmode.mv[1].as_int == zeromv[1].as_int)
        best_mbmode.mode = ZERO_ZEROMV;
#else
        best_mbmode.mode = NEARESTMV;
      else if (best_mbmode.mv[0].as_int == zeromv[0].as_int &&
               best_mbmode.mv[1].as_int == zeromv[1].as_int)
        best_mbmode.mode = ZEROMV;
#endif  // CONFIG_EXT_INTER
    }
#else
#if CONFIG_EXT_INTER
    if (!comp_pred_mode) {
#endif  // CONFIG_EXT_INTER
      if (frame_mv[NEARESTMV][refs[0]].as_int == best_mbmode.mv[0].as_int &&
          ((comp_pred_mode &&
            frame_mv[NEARESTMV][refs[1]].as_int == best_mbmode.mv[1].as_int) ||
           !comp_pred_mode))
        best_mbmode.mode = NEARESTMV;
      else if (frame_mv[NEARMV][refs[0]].as_int == best_mbmode.mv[0].as_int &&
               ((comp_pred_mode &&
                 frame_mv[NEARMV][refs[1]].as_int ==
                     best_mbmode.mv[1].as_int) ||
                !comp_pred_mode))
        best_mbmode.mode = NEARMV;
      else if (best_mbmode.mv[0].as_int == zeromv[0].as_int &&
               ((comp_pred_mode &&
                 best_mbmode.mv[1].as_int == zeromv[1].as_int) ||
                !comp_pred_mode))
        best_mbmode.mode = ZEROMV;
#if CONFIG_EXT_INTER
    } else {
      const MV_REFERENCE_FRAME refs[2] = { best_mbmode.ref_frame[0],
                                           best_mbmode.ref_frame[1] };
      int_mv zeromv[2];
#if CONFIG_GLOBAL_MOTION
      zeromv[0].as_int = gm_get_motion_vector(&cm->global_motion[refs[0]],
                                              cm->allow_high_precision_mv)
                             .as_int;
      zeromv[1].as_int = comp_pred_mode
                             ? gm_get_motion_vector(&cm->global_motion[refs[1]],
                                                    cm->allow_high_precision_mv)
                                   .as_int
                             : 0;
#else
      zeromv[0].as_int = 0;
      zeromv[1].as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
      if (frame_mv[NEAREST_NEARESTMV][refs[0]].as_int ==
              best_mbmode.mv[0].as_int &&
          frame_mv[NEAREST_NEARESTMV][refs[1]].as_int ==
              best_mbmode.mv[1].as_int)
        best_mbmode.mode = NEAREST_NEARESTMV;
      else if (frame_mv[NEAREST_NEARMV][refs[0]].as_int ==
                   best_mbmode.mv[0].as_int &&
               frame_mv[NEAREST_NEARMV][refs[1]].as_int ==
                   best_mbmode.mv[1].as_int)
        best_mbmode.mode = NEAREST_NEARMV;
      else if (frame_mv[NEAR_NEARESTMV][refs[0]].as_int ==
                   best_mbmode.mv[0].as_int &&
               frame_mv[NEAR_NEARESTMV][refs[1]].as_int ==
                   best_mbmode.mv[1].as_int)
        best_mbmode.mode = NEAR_NEARESTMV;
      else if (frame_mv[NEAR_NEARMV][refs[0]].as_int ==
                   best_mbmode.mv[0].as_int &&
               frame_mv[NEAR_NEARMV][refs[1]].as_int ==
                   best_mbmode.mv[1].as_int)
        best_mbmode.mode = NEAR_NEARMV;
      else if (best_mbmode.mv[0].as_int == zeromv[0].as_int &&
               best_mbmode.mv[1].as_int == zeromv[1].as_int)
        best_mbmode.mode = ZERO_ZEROMV;
    }
#endif  // CONFIG_EXT_INTER
#endif
  }

#if CONFIG_REF_MV
  {
    int8_t ref_frame_type = av1_ref_frame_type(best_mbmode.ref_frame);
    int16_t mode_ctx = mbmi_ext->mode_context[ref_frame_type];
    if (mode_ctx & (1 << ALL_ZERO_FLAG_OFFSET)) {
      int_mv zeromv[2];
#if CONFIG_GLOBAL_MOTION
      const MV_REFERENCE_FRAME refs[2] = { best_mbmode.ref_frame[0],
                                           best_mbmode.ref_frame[1] };
      zeromv[0].as_int = gm_get_motion_vector(&cm->global_motion[refs[0]],
                                              cm->allow_high_precision_mv)
                             .as_int;
      zeromv[1].as_int = gm_get_motion_vector(&cm->global_motion[refs[1]],
                                              cm->allow_high_precision_mv)
                             .as_int;
      lower_mv_precision(&zeromv[0].as_mv, cm->allow_high_precision_mv);
      lower_mv_precision(&zeromv[1].as_mv, cm->allow_high_precision_mv);
#else
      zeromv[0].as_int = zeromv[1].as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
      if (best_mbmode.ref_frame[0] > INTRA_FRAME &&
          best_mbmode.mv[0].as_int == zeromv[0].as_int &&
#if CONFIG_EXT_INTER
          (best_mbmode.ref_frame[1] <= INTRA_FRAME)
#else
          (best_mbmode.ref_frame[1] == NONE_FRAME ||
           best_mbmode.mv[1].as_int == zeromv[1].as_int)
#endif  // CONFIG_EXT_INTER
              ) {
        best_mbmode.mode = ZEROMV;
      }
    }
  }
#endif

  if (best_mode_index < 0 || best_rd >= best_rd_so_far) {
    rd_cost->rate = INT_MAX;
    rd_cost->rdcost = INT64_MAX;
    return;
  }

#if CONFIG_DUAL_FILTER
  assert((cm->interp_filter == SWITCHABLE) ||
         (cm->interp_filter == best_mbmode.interp_filter[0]) ||
         !is_inter_block(&best_mbmode));
  assert((cm->interp_filter == SWITCHABLE) ||
         (cm->interp_filter == best_mbmode.interp_filter[1]) ||
         !is_inter_block(&best_mbmode));
  if (best_mbmode.ref_frame[1] > INTRA_FRAME) {
    assert((cm->interp_filter == SWITCHABLE) ||
           (cm->interp_filter == best_mbmode.interp_filter[2]) ||
           !is_inter_block(&best_mbmode));
    assert((cm->interp_filter == SWITCHABLE) ||
           (cm->interp_filter == best_mbmode.interp_filter[3]) ||
           !is_inter_block(&best_mbmode));
  }
#else
  assert((cm->interp_filter == SWITCHABLE) ||
         (cm->interp_filter == best_mbmode.interp_filter) ||
         !is_inter_block(&best_mbmode));
#endif

  if (!cpi->rc.is_src_frame_alt_ref)
    av1_update_rd_thresh_fact(cm, tile_data->thresh_freq_fact,
                              sf->adaptive_rd_thresh, bsize, best_mode_index);

  // macroblock modes
  *mbmi = best_mbmode;
  x->skip |= best_skip2;

// Note: this section is needed since the mode may have been forced to
// ZEROMV by the all-zero mode handling of ref-mv.
#if CONFIG_GLOBAL_MOTION
  if (mbmi->mode == ZEROMV
#if CONFIG_EXT_INTER
      || mbmi->mode == ZERO_ZEROMV
#endif  // CONFIG_EXT_INTER
      ) {
    if (is_nontrans_global_motion(xd)) {
#if CONFIG_DUAL_FILTER
      mbmi->interp_filter[0] = cm->interp_filter == SWITCHABLE
                                   ? EIGHTTAP_REGULAR
                                   : cm->interp_filter;
      mbmi->interp_filter[1] = cm->interp_filter == SWITCHABLE
                                   ? EIGHTTAP_REGULAR
                                   : cm->interp_filter;
#else
      mbmi->interp_filter = cm->interp_filter == SWITCHABLE ? EIGHTTAP_REGULAR
                                                            : cm->interp_filter;
#endif  // CONFIG_DUAL_FILTER
    }
  }
#endif  // CONFIG_GLOBAL_MOTION

#if CONFIG_REF_MV
  for (i = 0; i < 1 + has_second_ref(mbmi); ++i) {
    if (mbmi->mode != NEWMV)
      mbmi->pred_mv[i].as_int = mbmi->mv[i].as_int;
    else
      mbmi->pred_mv[i].as_int = mbmi_ext->ref_mvs[mbmi->ref_frame[i]][0].as_int;
  }
#endif

  for (i = 0; i < REFERENCE_MODES; ++i) {
    if (best_pred_rd[i] == INT64_MAX)
      best_pred_diff[i] = INT_MIN;
    else
      best_pred_diff[i] = best_rd - best_pred_rd[i];
  }

  x->skip |= best_mode_skippable;

  assert(best_mode_index >= 0);

  store_coding_context(x, ctx, best_mode_index, best_pred_diff,
                       best_mode_skippable);

#if CONFIG_PALETTE
  if (cm->allow_screen_content_tools && pmi->palette_size[1] > 0) {
    restore_uv_color_map(cpi, x);
  }
#endif  // CONFIG_PALETTE
}

void av1_rd_pick_inter_mode_sb_seg_skip(const AV1_COMP *cpi,
                                        TileDataEnc *tile_data, MACROBLOCK *x,
                                        RD_COST *rd_cost, BLOCK_SIZE bsize,
                                        PICK_MODE_CONTEXT *ctx,
                                        int64_t best_rd_so_far) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  unsigned char segment_id = mbmi->segment_id;
  const int comp_pred = 0;
  int i;
  int64_t best_pred_diff[REFERENCE_MODES];
  unsigned int ref_costs_single[TOTAL_REFS_PER_FRAME];
  unsigned int ref_costs_comp[TOTAL_REFS_PER_FRAME];
  aom_prob comp_mode_p;
  InterpFilter best_filter = SWITCHABLE;
  int64_t this_rd = INT64_MAX;
  int rate2 = 0;
  const int64_t distortion2 = 0;

  estimate_ref_frame_costs(cm, xd, segment_id, ref_costs_single, ref_costs_comp,
                           &comp_mode_p);

  for (i = 0; i < TOTAL_REFS_PER_FRAME; ++i) x->pred_sse[i] = INT_MAX;
  for (i = LAST_FRAME; i < TOTAL_REFS_PER_FRAME; ++i)
    x->pred_mv_sad[i] = INT_MAX;

  rd_cost->rate = INT_MAX;

  assert(segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP));

#if CONFIG_PALETTE
  mbmi->palette_mode_info.palette_size[0] = 0;
  mbmi->palette_mode_info.palette_size[1] = 0;
#endif  // CONFIG_PALETTE

#if CONFIG_FILTER_INTRA
  mbmi->filter_intra_mode_info.use_filter_intra_mode[0] = 0;
  mbmi->filter_intra_mode_info.use_filter_intra_mode[1] = 0;
#endif  // CONFIG_FILTER_INTRA
  mbmi->mode = ZEROMV;
  mbmi->motion_mode = SIMPLE_TRANSLATION;
  mbmi->uv_mode = DC_PRED;
  mbmi->ref_frame[0] = LAST_FRAME;
  mbmi->ref_frame[1] = NONE_FRAME;
#if CONFIG_GLOBAL_MOTION
  mbmi->mv[0].as_int =
      gm_get_motion_vector(&cm->global_motion[mbmi->ref_frame[0]],
                           cm->allow_high_precision_mv)
          .as_int;
#else   // CONFIG_GLOBAL_MOTION
  mbmi->mv[0].as_int = 0;
#endif  // CONFIG_GLOBAL_MOTION
  mbmi->tx_size = max_txsize_lookup[bsize];
  x->skip = 1;

#if CONFIG_REF_MV
  mbmi->ref_mv_idx = 0;
  mbmi->pred_mv[0].as_int = 0;
#endif

  if (cm->interp_filter != BILINEAR) {
    best_filter = EIGHTTAP_REGULAR;
    if (cm->interp_filter == SWITCHABLE &&
#if CONFIG_DUAL_FILTER
        av1_is_interp_needed(xd) &&
#endif  // CONFIG_DUAL_FILTER
        x->source_variance >= cpi->sf.disable_filter_search_var_thresh) {
      int rs;
      int best_rs = INT_MAX;
      for (i = 0; i < SWITCHABLE_FILTERS; ++i) {
#if CONFIG_DUAL_FILTER
        int k;
        for (k = 0; k < 4; ++k) mbmi->interp_filter[k] = i;
#else
        mbmi->interp_filter = i;
#endif
        rs = av1_get_switchable_rate(cpi, xd);
        if (rs < best_rs) {
          best_rs = rs;
#if CONFIG_DUAL_FILTER
          best_filter = mbmi->interp_filter[0];
#else
          best_filter = mbmi->interp_filter;
#endif
        }
      }
    }
  }
  // Set the appropriate filter
  if (cm->interp_filter == SWITCHABLE) {
#if CONFIG_DUAL_FILTER
    for (i = 0; i < 4; ++i) mbmi->interp_filter[i] = best_filter;
#else
    mbmi->interp_filter = best_filter;
#endif
    rate2 += av1_get_switchable_rate(cpi, xd);
  } else {
#if CONFIG_DUAL_FILTER
    for (i = 0; i < 4; ++i) mbmi->interp_filter[0] = cm->interp_filter;
#else
    mbmi->interp_filter = cm->interp_filter;
#endif
  }

  if (cm->reference_mode == REFERENCE_MODE_SELECT)
    rate2 += av1_cost_bit(comp_mode_p, comp_pred);

  // Estimate the reference frame signaling cost and add it
  // to the rolling cost variable.
  rate2 += ref_costs_single[LAST_FRAME];
  this_rd = RDCOST(x->rdmult, x->rddiv, rate2, distortion2);

  rd_cost->rate = rate2;
  rd_cost->dist = distortion2;
  rd_cost->rdcost = this_rd;

  if (this_rd >= best_rd_so_far) {
    rd_cost->rate = INT_MAX;
    rd_cost->rdcost = INT64_MAX;
    return;
  }

#if CONFIG_DUAL_FILTER
  assert((cm->interp_filter == SWITCHABLE) ||
         (cm->interp_filter == mbmi->interp_filter[0]));
#else
  assert((cm->interp_filter == SWITCHABLE) ||
         (cm->interp_filter == mbmi->interp_filter));
#endif

  av1_update_rd_thresh_fact(cm, tile_data->thresh_freq_fact,
                            cpi->sf.adaptive_rd_thresh, bsize, THR_ZEROMV);

  av1_zero(best_pred_diff);

  store_coding_context(x, ctx, THR_ZEROMV, best_pred_diff, 0);
}

void av1_rd_pick_inter_mode_sub8x8(const struct AV1_COMP *cpi,
                                   TileDataEnc *tile_data, struct macroblock *x,
                                   int mi_row, int mi_col,
                                   struct RD_COST *rd_cost,
#if CONFIG_SUPERTX
                                   int *returnrate_nocoef,
#endif  // CONFIG_SUPERTX
                                   BLOCK_SIZE bsize, PICK_MODE_CONTEXT *ctx,
                                   int64_t best_rd_so_far) {
  const AV1_COMMON *const cm = &cpi->common;
  const RD_OPT *const rd_opt = &cpi->rd;
  const SPEED_FEATURES *const sf = &cpi->sf;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  const struct segmentation *const seg = &cm->seg;
  MV_REFERENCE_FRAME ref_frame, second_ref_frame;
  unsigned char segment_id = mbmi->segment_id;
  int comp_pred, i;
  int_mv frame_mv[MB_MODE_COUNT][TOTAL_REFS_PER_FRAME];
  struct buf_2d yv12_mb[TOTAL_REFS_PER_FRAME][MAX_MB_PLANE];
  static const int flag_list[TOTAL_REFS_PER_FRAME] = {
    0,
    AOM_LAST_FLAG,
#if CONFIG_EXT_REFS
    AOM_LAST2_FLAG,
    AOM_LAST3_FLAG,
#endif  // CONFIG_EXT_REFS
    AOM_GOLD_FLAG,
#if CONFIG_EXT_REFS
    AOM_BWD_FLAG,
#endif  // CONFIG_EXT_REFS
    AOM_ALT_FLAG
  };
  int64_t best_rd = best_rd_so_far;
  int64_t best_yrd = best_rd_so_far;  // FIXME(rbultje) more precise
  int64_t best_pred_diff[REFERENCE_MODES];
  int64_t best_pred_rd[REFERENCE_MODES];
  MB_MODE_INFO best_mbmode;
  int ref_index, best_ref_index = 0;
  unsigned int ref_costs_single[TOTAL_REFS_PER_FRAME];
  unsigned int ref_costs_comp[TOTAL_REFS_PER_FRAME];
  aom_prob comp_mode_p;
#if CONFIG_DUAL_FILTER
  InterpFilter tmp_best_filter[4] = { 0 };
#else
  InterpFilter tmp_best_filter = SWITCHABLE;
#endif
  int rate_uv_intra, rate_uv_tokenonly = INT_MAX;
  int64_t dist_uv = INT64_MAX;
  int skip_uv;
  PREDICTION_MODE mode_uv = DC_PRED;
  const int intra_cost_penalty = av1_get_intra_cost_penalty(
      cm->base_qindex, cm->y_dc_delta_q, cm->bit_depth);
#if CONFIG_EXT_INTER
  int_mv seg_mvs[4][2][TOTAL_REFS_PER_FRAME];
#else
  int_mv seg_mvs[4][TOTAL_REFS_PER_FRAME];
#endif  // CONFIG_EXT_INTER
  b_mode_info best_bmodes[4];
  int best_skip2 = 0;
  int ref_frame_skip_mask[2] = { 0 };
  int internal_active_edge =
      av1_active_edge_sb(cpi, mi_row, mi_col) && av1_internal_image_edge(cpi);
#if CONFIG_PVQ
  od_rollback_buffer pre_buf;

  od_encode_checkpoint(&x->daala_enc, &pre_buf);
#endif

#if CONFIG_SUPERTX
  best_rd_so_far = INT64_MAX;
  best_rd = best_rd_so_far;
  best_yrd = best_rd_so_far;
#endif  // CONFIG_SUPERTX
  av1_zero(best_mbmode);

#if CONFIG_FILTER_INTRA
  mbmi->filter_intra_mode_info.use_filter_intra_mode[0] = 0;
  mbmi->filter_intra_mode_info.use_filter_intra_mode[1] = 0;
#endif  // CONFIG_FILTER_INTRA
  mbmi->motion_mode = SIMPLE_TRANSLATION;
#if CONFIG_EXT_INTER
  mbmi->interinter_compound_data.type = COMPOUND_AVERAGE;
  mbmi->use_wedge_interintra = 0;
#endif  // CONFIG_EXT_INTER
#if CONFIG_WARPED_MOTION
  mbmi->num_proj_ref[0] = 0;
  mbmi->num_proj_ref[1] = 0;
#endif  // CONFIG_WARPED_MOTION

  for (i = 0; i < 4; i++) {
    int j;
#if CONFIG_EXT_INTER
    int k;

    for (k = 0; k < 2; k++)
      for (j = 0; j < TOTAL_REFS_PER_FRAME; j++)
        seg_mvs[i][k][j].as_int = INVALID_MV;
#else
    for (j = 0; j < TOTAL_REFS_PER_FRAME; j++)
      seg_mvs[i][j].as_int = INVALID_MV;
#endif  // CONFIG_EXT_INTER
  }

  estimate_ref_frame_costs(cm, xd, segment_id, ref_costs_single, ref_costs_comp,
                           &comp_mode_p);

  for (i = 0; i < REFERENCE_MODES; ++i) best_pred_rd[i] = INT64_MAX;
  rate_uv_intra = INT_MAX;

  rd_cost->rate = INT_MAX;
#if CONFIG_SUPERTX
  *returnrate_nocoef = INT_MAX;
#endif

  for (ref_frame = LAST_FRAME; ref_frame <= ALTREF_FRAME; ref_frame++) {
    x->mbmi_ext->mode_context[ref_frame] = 0;
#if CONFIG_REF_MV && CONFIG_EXT_INTER
    x->mbmi_ext->compound_mode_context[ref_frame] = 0;
#endif  // CONFIG_REF_MV && CONFIG_EXT_INTER
    if (cpi->ref_frame_flags & flag_list[ref_frame]) {
      setup_buffer_inter(cpi, x, ref_frame, bsize, mi_row, mi_col,
                         frame_mv[NEARESTMV], frame_mv[NEARMV], yv12_mb);
    } else {
      ref_frame_skip_mask[0] |= (1 << ref_frame);
      ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
    }
    frame_mv[NEWMV][ref_frame].as_int = INVALID_MV;
#if CONFIG_EXT_INTER
    frame_mv[NEWFROMNEARMV][ref_frame].as_int = INVALID_MV;
#endif  // CONFIG_EXT_INTER
    frame_mv[ZEROMV][ref_frame].as_int = 0;
  }

#if CONFIG_PALETTE
  mbmi->palette_mode_info.palette_size[0] = 0;
  mbmi->palette_mode_info.palette_size[1] = 0;
#endif  // CONFIG_PALETTE

  for (ref_index = 0; ref_index < MAX_REFS; ++ref_index) {
    int mode_excluded = 0;
    int64_t this_rd = INT64_MAX;
    int disable_skip = 0;
    int compmode_cost = 0;
    int rate2 = 0, rate_y = 0, rate_uv = 0;
    int64_t distortion2 = 0, distortion_y = 0, distortion_uv = 0;
    int skippable = 0;
    int this_skip2 = 0;
    int64_t total_sse = INT_MAX;

#if CONFIG_PVQ
    od_encode_rollback(&x->daala_enc, &pre_buf);
#endif

    ref_frame = av1_ref_order[ref_index].ref_frame[0];
    second_ref_frame = av1_ref_order[ref_index].ref_frame[1];

#if CONFIG_REF_MV
    mbmi->ref_mv_idx = 0;
#endif

    // Look at the reference frame of the best mode so far and set the
    // skip mask to look at a subset of the remaining modes.
    if (ref_index > 2 && sf->mode_skip_start < MAX_MODES) {
      if (ref_index == 3) {
        switch (best_mbmode.ref_frame[0]) {
          case INTRA_FRAME: break;
          case LAST_FRAME:
            ref_frame_skip_mask[0] |= (1 << GOLDEN_FRAME) |
#if CONFIG_EXT_REFS
                                      (1 << LAST2_FRAME) | (1 << LAST3_FRAME) |
                                      (1 << BWDREF_FRAME) |
#endif  // CONFIG_EXT_REFS
                                      (1 << ALTREF_FRAME);
            ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
            break;
#if CONFIG_EXT_REFS
          case LAST2_FRAME:
            ref_frame_skip_mask[0] |= (1 << LAST_FRAME) | (1 << LAST3_FRAME) |
                                      (1 << GOLDEN_FRAME) |
                                      (1 << BWDREF_FRAME) | (1 << ALTREF_FRAME);
            ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
            break;
          case LAST3_FRAME:
            ref_frame_skip_mask[0] |= (1 << LAST_FRAME) | (1 << LAST2_FRAME) |
                                      (1 << GOLDEN_FRAME) |
                                      (1 << BWDREF_FRAME) | (1 << ALTREF_FRAME);
            ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
            break;
#endif  // CONFIG_EXT_REFS
          case GOLDEN_FRAME:
            ref_frame_skip_mask[0] |= (1 << LAST_FRAME) |
#if CONFIG_EXT_REFS
                                      (1 << LAST2_FRAME) | (1 << LAST3_FRAME) |
                                      (1 << BWDREF_FRAME) |
#endif  // CONFIG_EXT_REFS
                                      (1 << ALTREF_FRAME);
            ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
            break;
#if CONFIG_EXT_REFS
          case BWDREF_FRAME:
            ref_frame_skip_mask[0] |= (1 << LAST_FRAME) | (1 << LAST2_FRAME) |
                                      (1 << LAST3_FRAME) | (1 << GOLDEN_FRAME) |
                                      (1 << ALTREF_FRAME);
            ref_frame_skip_mask[1] |= (1 << ALTREF_FRAME) | 0x01;
            break;
#endif  // CONFIG_EXT_REFS
          case ALTREF_FRAME:
            ref_frame_skip_mask[0] |= (1 << LAST_FRAME) |
#if CONFIG_EXT_REFS
                                      (1 << LAST2_FRAME) | (1 << LAST3_FRAME) |
                                      (1 << BWDREF_FRAME) |
#endif  // CONFIG_EXT_REFS
                                      (1 << GOLDEN_FRAME);
#if CONFIG_EXT_REFS
            ref_frame_skip_mask[1] |= (1 << BWDREF_FRAME) | 0x01;
#endif  // CONFIG_EXT_REFS
            break;
          case NONE_FRAME:
          case TOTAL_REFS_PER_FRAME:
            assert(0 && "Invalid Reference frame");
            break;
        }
      }
    }

    if ((ref_frame_skip_mask[0] & (1 << ref_frame)) &&
        (ref_frame_skip_mask[1] & (1 << AOMMAX(0, second_ref_frame))))
      continue;

    // Test best rd so far against threshold for trying this mode.
    if (!internal_active_edge &&
        rd_less_than_thresh(best_rd,
                            rd_opt->threshes[segment_id][bsize][ref_index],
                            tile_data->thresh_freq_fact[bsize][ref_index]))
      continue;

    comp_pred = second_ref_frame > INTRA_FRAME;
    if (comp_pred) {
      if (!cpi->allow_comp_inter_inter) continue;
      if (!(cpi->ref_frame_flags & flag_list[second_ref_frame])) continue;
      // Do not allow compound prediction if the segment level reference frame
      // feature is in use as in this case there can only be one reference.
      if (segfeature_active(seg, segment_id, SEG_LVL_REF_FRAME)) continue;

      if ((sf->mode_search_skip_flags & FLAG_SKIP_COMP_BESTINTRA) &&
          best_mbmode.ref_frame[0] == INTRA_FRAME)
        continue;
    }

    // TODO(jingning, jkoleszar): scaling reference frame not supported for
    // sub8x8 blocks.
    if (ref_frame > INTRA_FRAME &&
        av1_is_scaled(&cm->frame_refs[ref_frame - 1].sf))
      continue;

    if (second_ref_frame > INTRA_FRAME &&
        av1_is_scaled(&cm->frame_refs[second_ref_frame - 1].sf))
      continue;

    if (comp_pred)
      mode_excluded = cm->reference_mode == SINGLE_REFERENCE;
    else if (ref_frame != INTRA_FRAME)
      mode_excluded = cm->reference_mode == COMPOUND_REFERENCE;

    // If the segment reference frame feature is enabled....
    // then do nothing if the current ref frame is not allowed..
    if (segfeature_active(seg, segment_id, SEG_LVL_REF_FRAME) &&
        get_segdata(seg, segment_id, SEG_LVL_REF_FRAME) != (int)ref_frame) {
      continue;
      // Disable this drop out case if the ref frame
      // segment level feature is enabled for this segment. This is to
      // prevent the possibility that we end up unable to pick any mode.
    } else if (!segfeature_active(seg, segment_id, SEG_LVL_REF_FRAME)) {
      // Only consider ZEROMV/ALTREF_FRAME for alt ref frame,
      // unless ARNR filtering is enabled in which case we want
      // an unfiltered alternative. We allow near/nearest as well
      // because they may result in zero-zero MVs but be cheaper.
      if (cpi->rc.is_src_frame_alt_ref && (cpi->oxcf.arnr_max_frames == 0))
        continue;
    }

    mbmi->tx_size = TX_4X4;
    mbmi->uv_mode = DC_PRED;
    mbmi->ref_frame[0] = ref_frame;
    mbmi->ref_frame[1] = second_ref_frame;
// Evaluate all sub-pel filters irrespective of whether we can use
// them for this frame.
#if CONFIG_DUAL_FILTER
    for (i = 0; i < 4; ++i)
      mbmi->interp_filter[i] = cm->interp_filter == SWITCHABLE
                                   ? EIGHTTAP_REGULAR
                                   : cm->interp_filter;
#else
    mbmi->interp_filter =
        cm->interp_filter == SWITCHABLE ? EIGHTTAP_REGULAR : cm->interp_filter;
#endif
    x->skip = 0;
    set_ref_ptrs(cm, xd, ref_frame, second_ref_frame);

    // Select prediction reference frames.
    for (i = 0; i < MAX_MB_PLANE; i++) {
      xd->plane[i].pre[0] = yv12_mb[ref_frame][i];
      if (comp_pred) xd->plane[i].pre[1] = yv12_mb[second_ref_frame][i];
    }

#if CONFIG_VAR_TX
    mbmi->inter_tx_size[0][0] = mbmi->tx_size;
    mbmi->min_tx_size = get_min_tx_size(mbmi->tx_size);
#endif

    if (ref_frame == INTRA_FRAME) {
      int rate;
      if (rd_pick_intra_sub_8x8_y_mode(cpi, x, &rate, &rate_y, &distortion_y,
                                       NULL, best_rd) >= best_rd)
        continue;
      rate2 += rate;
      rate2 += intra_cost_penalty;
      distortion2 += distortion_y;

      if (rate_uv_intra == INT_MAX) {
        choose_intra_uv_mode(cpi, x, ctx, bsize, TX_4X4, &rate_uv_intra,
                             &rate_uv_tokenonly, &dist_uv, &skip_uv, &mode_uv);
      }
      rate2 += rate_uv_intra;
      rate_uv = rate_uv_tokenonly;
      distortion2 += dist_uv;
      distortion_uv = dist_uv;
      mbmi->uv_mode = mode_uv;
    } else {
      int rate;
      int64_t distortion;
      int64_t this_rd_thresh;
      int64_t tmp_rd, tmp_best_rd = INT64_MAX, tmp_best_rdu = INT64_MAX;
      int tmp_best_rate = INT_MAX, tmp_best_ratey = INT_MAX;
      int64_t tmp_best_distortion = INT_MAX, tmp_best_sse, uv_sse;
      int tmp_best_skippable = 0;
      int switchable_filter_index;
      int_mv *second_ref =
          comp_pred ? &x->mbmi_ext->ref_mvs[second_ref_frame][0] : NULL;
      b_mode_info tmp_best_bmodes[16];  // Should this be 4 ?
      MB_MODE_INFO tmp_best_mbmode;
#if CONFIG_DUAL_FILTER
      BEST_SEG_INFO bsi[DUAL_FILTER_SET_SIZE];
#else
      BEST_SEG_INFO bsi[SWITCHABLE_FILTERS];
#endif
      int pred_exists = 0;
      int uv_skippable;
#if CONFIG_EXT_INTER
      int_mv compound_seg_newmvs[4][2];
      for (i = 0; i < 4; i++) {
        compound_seg_newmvs[i][0].as_int = INVALID_MV;
        compound_seg_newmvs[i][1].as_int = INVALID_MV;
      }
#endif  // CONFIG_EXT_INTER

      this_rd_thresh = (ref_frame == LAST_FRAME)
                           ? rd_opt->threshes[segment_id][bsize][THR_LAST]
                           : rd_opt->threshes[segment_id][bsize][THR_ALTR];
#if CONFIG_EXT_REFS
      this_rd_thresh = (ref_frame == LAST2_FRAME)
                           ? rd_opt->threshes[segment_id][bsize][THR_LAST2]
                           : this_rd_thresh;
      this_rd_thresh = (ref_frame == LAST3_FRAME)
                           ? rd_opt->threshes[segment_id][bsize][THR_LAST3]
                           : this_rd_thresh;
      this_rd_thresh = (ref_frame == BWDREF_FRAME)
                           ? rd_opt->threshes[segment_id][bsize][THR_BWDR]
                           : this_rd_thresh;
#endif  // CONFIG_EXT_REFS
      this_rd_thresh = (ref_frame == GOLDEN_FRAME)
                           ? rd_opt->threshes[segment_id][bsize][THR_GOLD]
                           : this_rd_thresh;

      // TODO(any): Add search of the tx_type to improve rd performance at the
      // expense of speed.
      mbmi->tx_type = DCT_DCT;

      if (cm->interp_filter != BILINEAR) {
#if CONFIG_DUAL_FILTER
        tmp_best_filter[0] = EIGHTTAP_REGULAR;
        tmp_best_filter[1] = EIGHTTAP_REGULAR;
        tmp_best_filter[2] = EIGHTTAP_REGULAR;
        tmp_best_filter[3] = EIGHTTAP_REGULAR;
#else
        tmp_best_filter = EIGHTTAP_REGULAR;
#endif
        if (x->source_variance < sf->disable_filter_search_var_thresh) {
#if CONFIG_DUAL_FILTER
          tmp_best_filter[0] = EIGHTTAP_REGULAR;
#else
          tmp_best_filter = EIGHTTAP_REGULAR;
#endif
        } else if (sf->adaptive_pred_interp_filter == 1 &&
                   ctx->pred_interp_filter < SWITCHABLE) {
#if CONFIG_DUAL_FILTER
          tmp_best_filter[0] = ctx->pred_interp_filter;
#else
          tmp_best_filter = ctx->pred_interp_filter;
#endif
        } else if (sf->adaptive_pred_interp_filter == 2) {
#if CONFIG_DUAL_FILTER
          tmp_best_filter[0] = ctx->pred_interp_filter < SWITCHABLE
                                   ? ctx->pred_interp_filter
                                   : 0;
#else
          tmp_best_filter = ctx->pred_interp_filter < SWITCHABLE
                                ? ctx->pred_interp_filter
                                : 0;
#endif
        } else {
#if CONFIG_DUAL_FILTER
          const int filter_set_size = DUAL_FILTER_SET_SIZE;
#else
          const int filter_set_size = SWITCHABLE_FILTERS;
#endif
          for (switchable_filter_index = 0;
               switchable_filter_index < filter_set_size;
               ++switchable_filter_index) {
            int newbest, rs;
            int64_t rs_rd;
            MB_MODE_INFO_EXT *mbmi_ext = x->mbmi_ext;
#if CONFIG_DUAL_FILTER
            mbmi->interp_filter[0] = filter_sets[switchable_filter_index][0];
            mbmi->interp_filter[1] = filter_sets[switchable_filter_index][1];
            mbmi->interp_filter[2] = filter_sets[switchable_filter_index][0];
            mbmi->interp_filter[3] = filter_sets[switchable_filter_index][1];
#else
            mbmi->interp_filter = switchable_filter_index;
#endif
            tmp_rd = rd_pick_inter_best_sub8x8_mode(
                cpi, x, &mbmi_ext->ref_mvs[ref_frame][0], second_ref, best_yrd,
                &rate, &rate_y, &distortion, &skippable, &total_sse,
                (int)this_rd_thresh, seg_mvs,
#if CONFIG_EXT_INTER
                compound_seg_newmvs,
#endif  // CONFIG_EXT_INTER
                bsi, switchable_filter_index, mi_row, mi_col);
#if CONFIG_DUAL_FILTER
            if (!av1_is_interp_needed(xd) && cm->interp_filter == SWITCHABLE &&
                (mbmi->interp_filter[0] != EIGHTTAP_REGULAR ||
                 mbmi->interp_filter[1] != EIGHTTAP_REGULAR))  // invalid config
              continue;
#endif  // CONFIG_DUAL_FILTER
            if (tmp_rd == INT64_MAX) continue;
            rs = av1_get_switchable_rate(cpi, xd);
            rs_rd = RDCOST(x->rdmult, x->rddiv, rs, 0);
            if (cm->interp_filter == SWITCHABLE) tmp_rd += rs_rd;

            newbest = (tmp_rd < tmp_best_rd);
            if (newbest) {
#if CONFIG_DUAL_FILTER
              tmp_best_filter[0] = mbmi->interp_filter[0];
              tmp_best_filter[1] = mbmi->interp_filter[1];
              tmp_best_filter[2] = mbmi->interp_filter[2];
              tmp_best_filter[3] = mbmi->interp_filter[3];
#else
              tmp_best_filter = mbmi->interp_filter;
#endif
              tmp_best_rd = tmp_rd;
            }
            if ((newbest && cm->interp_filter == SWITCHABLE) ||
                (
#if CONFIG_DUAL_FILTER
                    mbmi->interp_filter[0] == cm->interp_filter
#else
                    mbmi->interp_filter == cm->interp_filter
#endif
                    && cm->interp_filter != SWITCHABLE)) {
              tmp_best_rdu = tmp_rd;
              tmp_best_rate = rate;
              tmp_best_ratey = rate_y;
              tmp_best_distortion = distortion;
              tmp_best_sse = total_sse;
              tmp_best_skippable = skippable;
              tmp_best_mbmode = *mbmi;
              for (i = 0; i < 4; i++) {
                tmp_best_bmodes[i] = xd->mi[0]->bmi[i];
              }
              pred_exists = 1;
            }
          }  // switchable_filter_index loop
        }
      }

      if (tmp_best_rdu == INT64_MAX && pred_exists) continue;

#if CONFIG_DUAL_FILTER
      mbmi->interp_filter[0] =
          (cm->interp_filter == SWITCHABLE ? tmp_best_filter[0]
                                           : cm->interp_filter);
      mbmi->interp_filter[1] =
          (cm->interp_filter == SWITCHABLE ? tmp_best_filter[1]
                                           : cm->interp_filter);
      mbmi->interp_filter[2] =
          (cm->interp_filter == SWITCHABLE ? tmp_best_filter[2]
                                           : cm->interp_filter);
      mbmi->interp_filter[3] =
          (cm->interp_filter == SWITCHABLE ? tmp_best_filter[3]
                                           : cm->interp_filter);
#else
      mbmi->interp_filter =
          (cm->interp_filter == SWITCHABLE ? tmp_best_filter
                                           : cm->interp_filter);
#endif

      if (!pred_exists) {
        // Handles the special case when a filter that is not in the
        // switchable list (bilinear) is indicated at the frame level
        tmp_rd = rd_pick_inter_best_sub8x8_mode(
            cpi, x, &x->mbmi_ext->ref_mvs[ref_frame][0], second_ref, best_yrd,
            &rate, &rate_y, &distortion, &skippable, &total_sse,
            (int)this_rd_thresh, seg_mvs,
#if CONFIG_EXT_INTER
            compound_seg_newmvs,
#endif  // CONFIG_EXT_INTER
            bsi, 0, mi_row, mi_col);
#if CONFIG_DUAL_FILTER
        if (!av1_is_interp_needed(xd) && cm->interp_filter == SWITCHABLE &&
            (mbmi->interp_filter[0] != EIGHTTAP_REGULAR ||
             mbmi->interp_filter[1] != EIGHTTAP_REGULAR)) {
          mbmi->interp_filter[0] = EIGHTTAP_REGULAR;
          mbmi->interp_filter[1] = EIGHTTAP_REGULAR;
        }
#endif  // CONFIG_DUAL_FILTER
        if (tmp_rd == INT64_MAX) continue;
      } else {
        total_sse = tmp_best_sse;
        rate = tmp_best_rate;
        rate_y = tmp_best_ratey;
        distortion = tmp_best_distortion;
        skippable = tmp_best_skippable;
        *mbmi = tmp_best_mbmode;
        for (i = 0; i < 4; i++) xd->mi[0]->bmi[i] = tmp_best_bmodes[i];
      }
      // Add in the cost of the transform type
      if (!xd->lossless[mbmi->segment_id]) {
        int rate_tx_type = 0;
#if CONFIG_EXT_TX
        if (get_ext_tx_types(mbmi->tx_size, bsize, 1) > 1) {
          const int eset = get_ext_tx_set(mbmi->tx_size, bsize, 1);
          rate_tx_type =
              cpi->inter_tx_type_costs[eset][mbmi->tx_size][mbmi->tx_type];
        }
#else
        if (mbmi->tx_size < TX_32X32) {
          rate_tx_type = cpi->inter_tx_type_costs[mbmi->tx_size][mbmi->tx_type];
        }
#endif
        rate += rate_tx_type;
        rate_y += rate_tx_type;
      }

      rate2 += rate;
      distortion2 += distortion;

      if (cm->interp_filter == SWITCHABLE)
        rate2 += av1_get_switchable_rate(cpi, xd);

      if (!mode_excluded)
        mode_excluded = comp_pred ? cm->reference_mode == SINGLE_REFERENCE
                                  : cm->reference_mode == COMPOUND_REFERENCE;

      compmode_cost = av1_cost_bit(comp_mode_p, comp_pred);

      tmp_best_rdu =
          best_rd - AOMMIN(RDCOST(x->rdmult, x->rddiv, rate2, distortion2),
                           RDCOST(x->rdmult, x->rddiv, 0, total_sse));

      if (tmp_best_rdu > 0) {
        // If even the 'Y' rd value of split is higher than best so far
        // then dont bother looking at UV
        int is_cost_valid_uv;
        RD_STATS rd_stats_uv;
        av1_build_inter_predictors_sbuv(&x->e_mbd, mi_row, mi_col, NULL,
                                        BLOCK_8X8);
#if CONFIG_VAR_TX
        is_cost_valid_uv =
            inter_block_uvrd(cpi, x, &rd_stats_uv, BLOCK_8X8, tmp_best_rdu);
#else
        is_cost_valid_uv =
            super_block_uvrd(cpi, x, &rd_stats_uv, BLOCK_8X8, tmp_best_rdu);
#endif
        rate_uv = rd_stats_uv.rate;
        distortion_uv = rd_stats_uv.dist;
        uv_skippable = rd_stats_uv.skip;
        uv_sse = rd_stats_uv.sse;

        if (!is_cost_valid_uv) continue;
        rate2 += rate_uv;
        distortion2 += distortion_uv;
        skippable = skippable && uv_skippable;
        total_sse += uv_sse;
      } else {
        continue;
      }
    }

    if (cm->reference_mode == REFERENCE_MODE_SELECT) rate2 += compmode_cost;

    // Estimate the reference frame signaling cost and add it
    // to the rolling cost variable.
    if (second_ref_frame > INTRA_FRAME) {
      rate2 += ref_costs_comp[ref_frame];
#if CONFIG_EXT_REFS
      rate2 += ref_costs_comp[second_ref_frame];
#endif  // CONFIG_EXT_REFS
    } else {
      rate2 += ref_costs_single[ref_frame];
    }

    if (!disable_skip) {
      // Skip is never coded at the segment level for sub8x8 blocks and instead
      // always coded in the bitstream at the mode info level.

      if (ref_frame != INTRA_FRAME && !xd->lossless[mbmi->segment_id]) {
        if (RDCOST(x->rdmult, x->rddiv, rate_y + rate_uv, distortion2) <
            RDCOST(x->rdmult, x->rddiv, 0, total_sse)) {
          // Add in the cost of the no skip flag.
          rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
        } else {
          // FIXME(rbultje) make this work for splitmv also
          rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 1);
          distortion2 = total_sse;
          assert(total_sse >= 0);
          rate2 -= (rate_y + rate_uv);
          rate_y = 0;
          rate_uv = 0;
          this_skip2 = 1;
        }
      } else {
        // Add in the cost of the no skip flag.
        rate2 += av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
      }

      // Calculate the final RD estimate for this mode.
      this_rd = RDCOST(x->rdmult, x->rddiv, rate2, distortion2);
    }

    if (!disable_skip && ref_frame == INTRA_FRAME) {
      for (i = 0; i < REFERENCE_MODES; ++i)
        best_pred_rd[i] = AOMMIN(best_pred_rd[i], this_rd);
    }

    // Did this mode help.. i.e. is it the new best mode
    if (this_rd < best_rd || x->skip) {
      if (!mode_excluded) {
        // Note index of best mode so far
        best_ref_index = ref_index;

        if (ref_frame == INTRA_FRAME) {
          /* required for left and above block mv */
          mbmi->mv[0].as_int = 0;
        }

        rd_cost->rate = rate2;
#if CONFIG_SUPERTX
        *returnrate_nocoef = rate2 - rate_y - rate_uv;
        if (!disable_skip)
          *returnrate_nocoef -=
              av1_cost_bit(av1_get_skip_prob(cm, xd), this_skip2);
        *returnrate_nocoef -= av1_cost_bit(av1_get_intra_inter_prob(cm, xd),
                                           mbmi->ref_frame[0] != INTRA_FRAME);
        assert(*returnrate_nocoef > 0);
#endif  // CONFIG_SUPERTX
        rd_cost->dist = distortion2;
        rd_cost->rdcost = this_rd;
        best_rd = this_rd;
        best_yrd =
            best_rd - RDCOST(x->rdmult, x->rddiv, rate_uv, distortion_uv);
        best_mbmode = *mbmi;
        best_skip2 = this_skip2;

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

        for (i = 0; i < 4; i++) best_bmodes[i] = xd->mi[0]->bmi[i];
      }
    }

    /* keep record of best compound/single-only prediction */
    if (!disable_skip && ref_frame != INTRA_FRAME) {
      int64_t single_rd, hybrid_rd, single_rate, hybrid_rate;

      if (cm->reference_mode == REFERENCE_MODE_SELECT) {
        single_rate = rate2 - compmode_cost;
        hybrid_rate = rate2;
      } else {
        single_rate = rate2;
        hybrid_rate = rate2 + compmode_cost;
      }

      single_rd = RDCOST(x->rdmult, x->rddiv, single_rate, distortion2);
      hybrid_rd = RDCOST(x->rdmult, x->rddiv, hybrid_rate, distortion2);

      if (!comp_pred && single_rd < best_pred_rd[SINGLE_REFERENCE])
        best_pred_rd[SINGLE_REFERENCE] = single_rd;
      else if (comp_pred && single_rd < best_pred_rd[COMPOUND_REFERENCE])
        best_pred_rd[COMPOUND_REFERENCE] = single_rd;

      if (hybrid_rd < best_pred_rd[REFERENCE_MODE_SELECT])
        best_pred_rd[REFERENCE_MODE_SELECT] = hybrid_rd;
    }

    if (x->skip && !comp_pred) break;
  }

  if (best_rd >= best_rd_so_far) {
    rd_cost->rate = INT_MAX;
    rd_cost->rdcost = INT64_MAX;
#if CONFIG_SUPERTX
    *returnrate_nocoef = INT_MAX;
#endif  // CONFIG_SUPERTX
    return;
  }

  if (best_rd == INT64_MAX) {
    rd_cost->rate = INT_MAX;
    rd_cost->dist = INT64_MAX;
    rd_cost->rdcost = INT64_MAX;
#if CONFIG_SUPERTX
    *returnrate_nocoef = INT_MAX;
#endif  // CONFIG_SUPERTX
    return;
  }

#if CONFIG_DUAL_FILTER
  assert((cm->interp_filter == SWITCHABLE) ||
         (cm->interp_filter == best_mbmode.interp_filter[0]) ||
         !is_inter_block(&best_mbmode));
#else
  assert((cm->interp_filter == SWITCHABLE) ||
         (cm->interp_filter == best_mbmode.interp_filter) ||
         !is_inter_block(&best_mbmode));
#endif

  av1_update_rd_thresh_fact(cm, tile_data->thresh_freq_fact,
                            sf->adaptive_rd_thresh, bsize, best_ref_index);

  // macroblock modes
  *mbmi = best_mbmode;
#if CONFIG_VAR_TX
  mbmi->inter_tx_size[0][0] = mbmi->tx_size;
#endif

  x->skip |= best_skip2;
  if (!is_inter_block(&best_mbmode)) {
    for (i = 0; i < 4; i++) xd->mi[0]->bmi[i].as_mode = best_bmodes[i].as_mode;
  } else {
    for (i = 0; i < 4; ++i)
      memcpy(&xd->mi[0]->bmi[i], &best_bmodes[i], sizeof(b_mode_info));

#if CONFIG_REF_MV
    mbmi->pred_mv[0].as_int = xd->mi[0]->bmi[3].pred_mv[0].as_int;
    mbmi->pred_mv[1].as_int = xd->mi[0]->bmi[3].pred_mv[1].as_int;
#endif
    mbmi->mv[0].as_int = xd->mi[0]->bmi[3].as_mv[0].as_int;
    mbmi->mv[1].as_int = xd->mi[0]->bmi[3].as_mv[1].as_int;
  }

// Note: this section is needed since the mode may have been forced to ZEROMV
#if CONFIG_GLOBAL_MOTION
  if (mbmi->mode == ZEROMV
#if CONFIG_EXT_INTER
      || mbmi->mode == ZERO_ZEROMV
#endif  // CONFIG_EXT_INTER
      ) {
    if (is_nontrans_global_motion(xd)) {
#if CONFIG_DUAL_FILTER
      mbmi->interp_filter[0] = cm->interp_filter == SWITCHABLE
                                   ? EIGHTTAP_REGULAR
                                   : cm->interp_filter;
      mbmi->interp_filter[1] = cm->interp_filter == SWITCHABLE
                                   ? EIGHTTAP_REGULAR
                                   : cm->interp_filter;
#else
      mbmi->interp_filter = cm->interp_filter == SWITCHABLE ? EIGHTTAP_REGULAR
                                                            : cm->interp_filter;
#endif  // CONFIG_DUAL_FILTER
    }
  }
#endif  // CONFIG_GLOBAL_MOTION

  for (i = 0; i < REFERENCE_MODES; ++i) {
    if (best_pred_rd[i] == INT64_MAX)
      best_pred_diff[i] = INT_MIN;
    else
      best_pred_diff[i] = best_rd - best_pred_rd[i];
  }

  store_coding_context(x, ctx, best_ref_index, best_pred_diff, 0);
}

#if CONFIG_MOTION_VAR
// This function has a structure similar to av1_build_obmc_inter_prediction
//
// The OBMC predictor is computed as:
//
//  PObmc(x,y) =
//    AOM_BLEND_A64(Mh(x),
//                  AOM_BLEND_A64(Mv(y), P(x,y), PAbove(x,y)),
//                  PLeft(x, y))
//
// Scaling up by AOM_BLEND_A64_MAX_ALPHA ** 2 and omitting the intermediate
// rounding, this can be written as:
//
//  AOM_BLEND_A64_MAX_ALPHA * AOM_BLEND_A64_MAX_ALPHA * Pobmc(x,y) =
//    Mh(x) * Mv(y) * P(x,y) +
//      Mh(x) * Cv(y) * Pabove(x,y) +
//      AOM_BLEND_A64_MAX_ALPHA * Ch(x) * PLeft(x, y)
//
// Where :
//
//  Cv(y) = AOM_BLEND_A64_MAX_ALPHA - Mv(y)
//  Ch(y) = AOM_BLEND_A64_MAX_ALPHA - Mh(y)
//
// This function computes 'wsrc' and 'mask' as:
//
//  wsrc(x, y) =
//    AOM_BLEND_A64_MAX_ALPHA * AOM_BLEND_A64_MAX_ALPHA * src(x, y) -
//      Mh(x) * Cv(y) * Pabove(x,y) +
//      AOM_BLEND_A64_MAX_ALPHA * Ch(x) * PLeft(x, y)
//
//  mask(x, y) = Mh(x) * Mv(y)
//
// These can then be used to efficiently approximate the error for any
// predictor P in the context of the provided neighbouring predictors by
// computing:
//
//  error(x, y) =
//    wsrc(x, y) - mask(x, y) * P(x, y) / (AOM_BLEND_A64_MAX_ALPHA ** 2)
//
static void calc_target_weighted_pred(const AV1_COMMON *cm, const MACROBLOCK *x,
                                      const MACROBLOCKD *xd, int mi_row,
                                      int mi_col, const uint8_t *above,
                                      int above_stride, const uint8_t *left,
                                      int left_stride) {
  const BLOCK_SIZE bsize = xd->mi[0]->mbmi.sb_type;
  int row, col, i;
  const int bw = xd->n8_w << MI_SIZE_LOG2;
  const int bh = xd->n8_h << MI_SIZE_LOG2;
  int32_t *mask_buf = x->mask_buf;
  int32_t *wsrc_buf = x->wsrc_buf;
  const int wsrc_stride = bw;
  const int mask_stride = bw;
  const int src_scale = AOM_BLEND_A64_MAX_ALPHA * AOM_BLEND_A64_MAX_ALPHA;
#if CONFIG_AOM_HIGHBITDEPTH
  const int is_hbd = (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) ? 1 : 0;
#else
  const int is_hbd = 0;
#endif  // CONFIG_AOM_HIGHBITDEPTH

  // plane 0 should not be subsampled
  assert(xd->plane[0].subsampling_x == 0);
  assert(xd->plane[0].subsampling_y == 0);

  av1_zero_array(wsrc_buf, bw * bh);
  for (i = 0; i < bw * bh; ++i) mask_buf[i] = AOM_BLEND_A64_MAX_ALPHA;

  // handle above row
  if (xd->up_available) {
    const int overlap = num_4x4_blocks_high_lookup[bsize] * 2;
    const int miw = AOMMIN(xd->n8_w, cm->mi_cols - mi_col);
    const int mi_row_offset = -1;
    const uint8_t *const mask1d = av1_get_obmc_mask(overlap);

    assert(miw > 0);

    i = 0;
    do {  // for each mi in the above row
      const int mi_col_offset = i;
      const MB_MODE_INFO *const above_mbmi =
          &xd->mi[mi_col_offset + mi_row_offset * xd->mi_stride]->mbmi;
      const int mi_step =
          AOMMIN(xd->n8_w, num_8x8_blocks_wide_lookup[above_mbmi->sb_type]);
      const int neighbor_bw = mi_step * MI_SIZE;

      if (is_neighbor_overlappable(above_mbmi)) {
        const int tmp_stride = above_stride;
        int32_t *wsrc = wsrc_buf + (i * MI_SIZE);
        int32_t *mask = mask_buf + (i * MI_SIZE);

        if (!is_hbd) {
          const uint8_t *tmp = above;

          for (row = 0; row < overlap; ++row) {
            const uint8_t m0 = mask1d[row];
            const uint8_t m1 = AOM_BLEND_A64_MAX_ALPHA - m0;
            for (col = 0; col < neighbor_bw; ++col) {
              wsrc[col] = m1 * tmp[col];
              mask[col] = m0;
            }
            wsrc += wsrc_stride;
            mask += mask_stride;
            tmp += tmp_stride;
          }
#if CONFIG_AOM_HIGHBITDEPTH
        } else {
          const uint16_t *tmp = CONVERT_TO_SHORTPTR(above);

          for (row = 0; row < overlap; ++row) {
            const uint8_t m0 = mask1d[row];
            const uint8_t m1 = AOM_BLEND_A64_MAX_ALPHA - m0;
            for (col = 0; col < neighbor_bw; ++col) {
              wsrc[col] = m1 * tmp[col];
              mask[col] = m0;
            }
            wsrc += wsrc_stride;
            mask += mask_stride;
            tmp += tmp_stride;
          }
#endif  // CONFIG_AOM_HIGHBITDEPTH
        }
      }

      above += neighbor_bw;
      i += mi_step;
    } while (i < miw);
  }

  for (i = 0; i < bw * bh; ++i) {
    wsrc_buf[i] *= AOM_BLEND_A64_MAX_ALPHA;
    mask_buf[i] *= AOM_BLEND_A64_MAX_ALPHA;
  }

  // handle left column
  if (xd->left_available) {
    const int overlap = num_4x4_blocks_wide_lookup[bsize] * 2;
    const int mih = AOMMIN(xd->n8_h, cm->mi_rows - mi_row);
    const int mi_col_offset = -1;
    const uint8_t *const mask1d = av1_get_obmc_mask(overlap);

    assert(mih > 0);

    i = 0;
    do {  // for each mi in the left column
      const int mi_row_offset = i;
      const MB_MODE_INFO *const left_mbmi =
          &xd->mi[mi_col_offset + mi_row_offset * xd->mi_stride]->mbmi;
      const int mi_step =
          AOMMIN(xd->n8_h, num_8x8_blocks_high_lookup[left_mbmi->sb_type]);
      const int neighbor_bh = mi_step * MI_SIZE;

      if (is_neighbor_overlappable(left_mbmi)) {
        const int tmp_stride = left_stride;
        int32_t *wsrc = wsrc_buf + (i * MI_SIZE * wsrc_stride);
        int32_t *mask = mask_buf + (i * MI_SIZE * mask_stride);

        if (!is_hbd) {
          const uint8_t *tmp = left;

          for (row = 0; row < neighbor_bh; ++row) {
            for (col = 0; col < overlap; ++col) {
              const uint8_t m0 = mask1d[col];
              const uint8_t m1 = AOM_BLEND_A64_MAX_ALPHA - m0;
              wsrc[col] = (wsrc[col] >> AOM_BLEND_A64_ROUND_BITS) * m0 +
                          (tmp[col] << AOM_BLEND_A64_ROUND_BITS) * m1;
              mask[col] = (mask[col] >> AOM_BLEND_A64_ROUND_BITS) * m0;
            }
            wsrc += wsrc_stride;
            mask += mask_stride;
            tmp += tmp_stride;
          }
#if CONFIG_AOM_HIGHBITDEPTH
        } else {
          const uint16_t *tmp = CONVERT_TO_SHORTPTR(left);

          for (row = 0; row < neighbor_bh; ++row) {
            for (col = 0; col < overlap; ++col) {
              const uint8_t m0 = mask1d[col];
              const uint8_t m1 = AOM_BLEND_A64_MAX_ALPHA - m0;
              wsrc[col] = (wsrc[col] >> AOM_BLEND_A64_ROUND_BITS) * m0 +
                          (tmp[col] << AOM_BLEND_A64_ROUND_BITS) * m1;
              mask[col] = (mask[col] >> AOM_BLEND_A64_ROUND_BITS) * m0;
            }
            wsrc += wsrc_stride;
            mask += mask_stride;
            tmp += tmp_stride;
          }
#endif  // CONFIG_AOM_HIGHBITDEPTH
        }
      }

      left += neighbor_bh * left_stride;
      i += mi_step;
    } while (i < mih);
  }

  if (!is_hbd) {
    const uint8_t *src = x->plane[0].src.buf;

    for (row = 0; row < bh; ++row) {
      for (col = 0; col < bw; ++col) {
        wsrc_buf[col] = src[col] * src_scale - wsrc_buf[col];
      }
      wsrc_buf += wsrc_stride;
      src += x->plane[0].src.stride;
    }
#if CONFIG_AOM_HIGHBITDEPTH
  } else {
    const uint16_t *src = CONVERT_TO_SHORTPTR(x->plane[0].src.buf);

    for (row = 0; row < bh; ++row) {
      for (col = 0; col < bw; ++col) {
        wsrc_buf[col] = src[col] * src_scale - wsrc_buf[col];
      }
      wsrc_buf += wsrc_stride;
      src += x->plane[0].src.stride;
    }
#endif  // CONFIG_AOM_HIGHBITDEPTH
  }
}

#if CONFIG_NCOBMC
void av1_check_ncobmc_rd(const struct AV1_COMP *cpi, struct macroblock *x,
                         int mi_row, int mi_col) {
  const AV1_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  MB_MODE_INFO backup_mbmi;
  BLOCK_SIZE bsize = mbmi->sb_type;
  int ref, skip_blk, backup_skip = x->skip;
  int64_t rd_causal;
  RD_STATS rd_stats_y, rd_stats_uv;
  int rate_skip0 = av1_cost_bit(av1_get_skip_prob(cm, xd), 0);
  int rate_skip1 = av1_cost_bit(av1_get_skip_prob(cm, xd), 1);

  // Recompute the best causal predictor and rd
  mbmi->motion_mode = SIMPLE_TRANSLATION;
  set_ref_ptrs(cm, xd, mbmi->ref_frame[0], mbmi->ref_frame[1]);
  for (ref = 0; ref < 1 + has_second_ref(mbmi); ++ref) {
    YV12_BUFFER_CONFIG *cfg = get_ref_frame_buffer(cpi, mbmi->ref_frame[ref]);
    assert(cfg != NULL);
    av1_setup_pre_planes(xd, ref, cfg, mi_row, mi_col,
                         &xd->block_refs[ref]->sf);
  }
  av1_setup_dst_planes(x->e_mbd.plane, get_frame_new_buffer(&cpi->common),
                       mi_row, mi_col);

  av1_build_inter_predictors_sb(xd, mi_row, mi_col, NULL, bsize);

  av1_subtract_plane(x, bsize, 0);
  super_block_yrd(cpi, x, &rd_stats_y, bsize, INT64_MAX);
  super_block_uvrd(cpi, x, &rd_stats_uv, bsize, INT64_MAX);
  assert(rd_stats_y.rate != INT_MAX && rd_stats_uv.rate != INT_MAX);
  if (rd_stats_y.skip && rd_stats_uv.skip) {
    rd_stats_y.rate = rate_skip1;
    rd_stats_uv.rate = 0;
    rd_stats_y.dist = rd_stats_y.sse;
    rd_stats_uv.dist = rd_stats_uv.sse;
    skip_blk = 0;
  } else if (RDCOST(x->rdmult, x->rddiv,
                    (rd_stats_y.rate + rd_stats_uv.rate + rate_skip0),
                    (rd_stats_y.dist + rd_stats_uv.dist)) >
             RDCOST(x->rdmult, x->rddiv, rate_skip1,
                    (rd_stats_y.sse + rd_stats_uv.sse))) {
    rd_stats_y.rate = rate_skip1;
    rd_stats_uv.rate = 0;
    rd_stats_y.dist = rd_stats_y.sse;
    rd_stats_uv.dist = rd_stats_uv.sse;
    skip_blk = 1;
  } else {
    rd_stats_y.rate += rate_skip0;
    skip_blk = 0;
  }
  backup_skip = skip_blk;
  backup_mbmi = *mbmi;
  rd_causal = RDCOST(x->rdmult, x->rddiv, (rd_stats_y.rate + rd_stats_uv.rate),
                     (rd_stats_y.dist + rd_stats_uv.dist));
  rd_causal += RDCOST(x->rdmult, x->rddiv,
                      av1_cost_bit(cm->fc->motion_mode_prob[bsize][0], 0), 0);

  // Check non-causal mode
  mbmi->motion_mode = OBMC_CAUSAL;
  av1_build_ncobmc_inter_predictors_sb(cm, xd, mi_row, mi_col);

  av1_subtract_plane(x, bsize, 0);
  super_block_yrd(cpi, x, &rd_stats_y, bsize, INT64_MAX);
  super_block_uvrd(cpi, x, &rd_stats_uv, bsize, INT64_MAX);
  assert(rd_stats_y.rate != INT_MAX && rd_stats_uv.rate != INT_MAX);
  if (rd_stats_y.skip && rd_stats_uv.skip) {
    rd_stats_y.rate = rate_skip1;
    rd_stats_uv.rate = 0;
    rd_stats_y.dist = rd_stats_y.sse;
    rd_stats_uv.dist = rd_stats_uv.sse;
    skip_blk = 0;
  } else if (RDCOST(x->rdmult, x->rddiv,
                    (rd_stats_y.rate + rd_stats_uv.rate + rate_skip0),
                    (rd_stats_y.dist + rd_stats_uv.dist)) >
             RDCOST(x->rdmult, x->rddiv, rate_skip1,
                    (rd_stats_y.sse + rd_stats_uv.sse))) {
    rd_stats_y.rate = rate_skip1;
    rd_stats_uv.rate = 0;
    rd_stats_y.dist = rd_stats_y.sse;
    rd_stats_uv.dist = rd_stats_uv.sse;
    skip_blk = 1;
  } else {
    rd_stats_y.rate += rate_skip0;
    skip_blk = 0;
  }

  if (rd_causal >
      RDCOST(x->rdmult, x->rddiv,
             rd_stats_y.rate + rd_stats_uv.rate +
                 av1_cost_bit(cm->fc->motion_mode_prob[bsize][0], 1),
             (rd_stats_y.dist + rd_stats_uv.dist))) {
    x->skip = skip_blk;
  } else {
    *mbmi = backup_mbmi;
    x->skip = backup_skip;
  }
}
#endif
#endif  // CONFIG_MOTION_VAR