rdopt.c 355 KB
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/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

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

#include "./vp10_rtcd.h"
#include "./vpx_dsp_rtcd.h"

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#include "vpx_dsp/vpx_dsp_common.h"
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#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/mem.h"
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#include "vpx_ports/system_state.h"
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#include "vp10/common/common.h"
#include "vp10/common/entropy.h"
#include "vp10/common/entropymode.h"
#include "vp10/common/idct.h"
#include "vp10/common/mvref_common.h"
#include "vp10/common/pred_common.h"
#include "vp10/common/quant_common.h"
#include "vp10/common/reconinter.h"
#include "vp10/common/reconintra.h"
#include "vp10/common/scan.h"
#include "vp10/common/seg_common.h"
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#include "vp10/encoder/cost.h"
#include "vp10/encoder/encodemb.h"
#include "vp10/encoder/encodemv.h"
#include "vp10/encoder/encoder.h"
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#include "vp10/encoder/hybrid_fwd_txfm.h"
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#include "vp10/encoder/mcomp.h"
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#include "vp10/encoder/palette.h"
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#include "vp10/encoder/quantize.h"
#include "vp10/encoder/ratectrl.h"
#include "vp10/encoder/rd.h"
#include "vp10/encoder/rdopt.h"
#include "vp10/encoder/aq_variance.h"
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#if CONFIG_EXT_REFS

#define LAST_FRAME_MODE_MASK    ((1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME) | \
                                 (1 << LAST2_FRAME) | (1 << INTRA_FRAME) | \
                                 (1 << LAST3_FRAME) | (1 << LAST4_FRAME))
#define LAST2_FRAME_MODE_MASK   ((1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME) | \
                                 (1 << LAST_FRAME) | (1 << INTRA_FRAME) | \
                                 (1 << LAST3_FRAME) | (1 << LAST4_FRAME))
#define LAST3_FRAME_MODE_MASK   ((1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME) | \
                                 (1 << LAST_FRAME) | (1 << INTRA_FRAME) | \
                                 (1 << LAST2_FRAME) | (1 << LAST4_FRAME))
#define LAST4_FRAME_MODE_MASK   ((1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME) | \
                                 (1 << LAST_FRAME) | (1 << INTRA_FRAME) | \
                                 (1 << LAST2_FRAME) | (1 << LAST3_FRAME))
#define GOLDEN_FRAME_MODE_MASK  ((1 << LAST_FRAME) | (1 << ALTREF_FRAME) | \
                                 (1 << LAST2_FRAME) | (1 << INTRA_FRAME) | \
                                 (1 << LAST3_FRAME) | (1 << LAST4_FRAME))
#define ALT_REF_MODE_MASK       ((1 << LAST_FRAME) | (1 << GOLDEN_FRAME) | \
                                 (1 << LAST2_FRAME) | (1 << INTRA_FRAME) | \
                                 (1 << LAST3_FRAME) | (1 << LAST4_FRAME))

#else

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#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 ALT_REF_MODE_MASK       ((1 << LAST_FRAME) | (1 << GOLDEN_FRAME) | \
                                 (1 << INTRA_FRAME))

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#endif  // CONFIG_EXT_REFS

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#define SECOND_REF_FRAME_MASK   ((1 << ALTREF_FRAME) | 0x01)

#define MIN_EARLY_TERM_INDEX    3
#define NEW_MV_DISCOUNT_FACTOR  8

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#if CONFIG_EXT_TX
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const double ext_tx_th = 0.99;
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#else
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const double ext_tx_th = 0.99;
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#endif

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const double ADST_FLIP_SVM[8] = {-7.3283, -3.0450, -3.2450, 3.6403,  // vert
                                 -9.4204, -3.1821, -4.6851, 4.1469};  // horz
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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 {
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  const VP10_COMP *cpi;
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  MACROBLOCK *x;
  ENTROPY_CONTEXT t_above[16];
  ENTROPY_CONTEXT t_left[16];
  int this_rate;
  int64_t this_dist;
  int64_t this_sse;
  int64_t this_rd;
  int64_t best_rd;
  int exit_early;
  int use_fast_coef_costing;
  const scan_order *so;
  uint8_t skippable;
};

#define LAST_NEW_MV_INDEX 6
static const MODE_DEFINITION vp10_mode_order[MAX_MODES] = {
  {NEARESTMV, {LAST_FRAME,   NONE}},
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#if CONFIG_EXT_REFS
  {NEARESTMV, {LAST2_FRAME,  NONE}},
  {NEARESTMV, {LAST3_FRAME,  NONE}},
  {NEARESTMV, {LAST4_FRAME,  NONE}},
#endif  // CONFIG_EXT_REFS
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  {NEARESTMV, {ALTREF_FRAME, NONE}},
  {NEARESTMV, {GOLDEN_FRAME, NONE}},

  {DC_PRED,   {INTRA_FRAME,  NONE}},

  {NEWMV,     {LAST_FRAME,   NONE}},
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#if CONFIG_EXT_REFS
  {NEWMV,     {LAST2_FRAME,  NONE}},
  {NEWMV,     {LAST3_FRAME,  NONE}},
  {NEWMV,     {LAST4_FRAME,  NONE}},
#endif  // CONFIG_EXT_REFS
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  {NEWMV,     {ALTREF_FRAME, NONE}},
  {NEWMV,     {GOLDEN_FRAME, NONE}},

  {NEARMV,    {LAST_FRAME,   NONE}},
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#if CONFIG_EXT_REFS
  {NEARMV,    {LAST2_FRAME,  NONE}},
  {NEARMV,    {LAST3_FRAME,  NONE}},
  {NEARMV,    {LAST4_FRAME,  NONE}},
#endif  // CONFIG_EXT_REFS
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  {NEARMV,    {ALTREF_FRAME, NONE}},
  {NEARMV,    {GOLDEN_FRAME, NONE}},

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#if CONFIG_EXT_INTER
  {NEWFROMNEARMV,    {LAST_FRAME,   NONE}},
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#if CONFIG_EXT_REFS
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  {NEWFROMNEARMV,    {LAST2_FRAME,  NONE}},
  {NEWFROMNEARMV,    {LAST3_FRAME,  NONE}},
  {NEWFROMNEARMV,    {LAST4_FRAME,  NONE}},
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#endif  // CONFIG_EXT_REFS
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  {NEWFROMNEARMV,    {ALTREF_FRAME, NONE}},
  {NEWFROMNEARMV,    {GOLDEN_FRAME, NONE}},
#endif  // CONFIG_EXT_INTER

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  {ZEROMV,    {LAST_FRAME,   NONE}},
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#if CONFIG_EXT_REFS
  {ZEROMV,    {LAST2_FRAME,  NONE}},
  {ZEROMV,    {LAST3_FRAME,  NONE}},
  {ZEROMV,    {LAST4_FRAME,  NONE}},
#endif  // CONFIG_EXT_REFS
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  {ZEROMV,    {GOLDEN_FRAME, NONE}},
  {ZEROMV,    {ALTREF_FRAME, NONE}},

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#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}},
  {NEAREST_NEARESTMV, {LAST4_FRAME,  ALTREF_FRAME}},
#endif  // CONFIG_EXT_REFS
  {NEAREST_NEARESTMV, {GOLDEN_FRAME, ALTREF_FRAME}},
#else  // CONFIG_EXT_INTER
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  {NEARESTMV, {LAST_FRAME,   ALTREF_FRAME}},
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#if CONFIG_EXT_REFS
  {NEARESTMV, {LAST2_FRAME,  ALTREF_FRAME}},
  {NEARESTMV, {LAST3_FRAME,  ALTREF_FRAME}},
  {NEARESTMV, {LAST4_FRAME,  ALTREF_FRAME}},
#endif  // CONFIG_EXT_REFS
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  {NEARESTMV, {GOLDEN_FRAME, ALTREF_FRAME}},
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#endif  // CONFIG_EXT_INTER
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  {TM_PRED,   {INTRA_FRAME,  NONE}},

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#if CONFIG_EXT_INTER
  {NEAR_NEARESTMV, {LAST_FRAME,   ALTREF_FRAME}},
  {NEAR_NEARESTMV, {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEAREST_NEARMV, {LAST_FRAME,   ALTREF_FRAME}},
  {NEAREST_NEARMV, {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEW_NEARESTMV, {LAST_FRAME,   ALTREF_FRAME}},
  {NEW_NEARESTMV, {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEAREST_NEWMV, {LAST_FRAME,   ALTREF_FRAME}},
  {NEAREST_NEWMV, {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEW_NEARMV, {LAST_FRAME,   ALTREF_FRAME}},
  {NEW_NEARMV, {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEAR_NEWMV, {LAST_FRAME,   ALTREF_FRAME}},
  {NEAR_NEWMV, {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEW_NEWMV,      {LAST_FRAME,   ALTREF_FRAME}},
  {NEW_NEWMV,      {GOLDEN_FRAME, ALTREF_FRAME}},
  {ZERO_ZEROMV,    {LAST_FRAME,   ALTREF_FRAME}},
  {ZERO_ZEROMV,    {GOLDEN_FRAME, ALTREF_FRAME}},
#if CONFIG_EXT_REFS
  {NEAR_NEARESTMV, {LAST2_FRAME,  ALTREF_FRAME}},
  {NEAREST_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}},
  {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}},

  {NEAR_NEARESTMV, {LAST4_FRAME,  ALTREF_FRAME}},
  {NEAREST_NEARMV, {LAST4_FRAME,  ALTREF_FRAME}},
  {NEW_NEARESTMV,  {LAST4_FRAME,  ALTREF_FRAME}},
  {NEAREST_NEWMV,  {LAST4_FRAME,  ALTREF_FRAME}},
  {NEW_NEARMV,     {LAST4_FRAME,  ALTREF_FRAME}},
  {NEAR_NEWMV,     {LAST4_FRAME,  ALTREF_FRAME}},
  {NEW_NEWMV,      {LAST4_FRAME,  ALTREF_FRAME}},
  {ZERO_ZEROMV,    {LAST4_FRAME,  ALTREF_FRAME}},
#endif  // CONFIG_EXT_REFS
#else
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  {NEARMV,    {LAST_FRAME,   ALTREF_FRAME}},
  {NEWMV,     {LAST_FRAME,   ALTREF_FRAME}},
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#if CONFIG_EXT_REFS
  {NEARMV,    {LAST2_FRAME,  ALTREF_FRAME}},
  {NEWMV,     {LAST2_FRAME,  ALTREF_FRAME}},
  {NEARMV,    {LAST3_FRAME,  ALTREF_FRAME}},
  {NEWMV,     {LAST3_FRAME,  ALTREF_FRAME}},
  {NEARMV,    {LAST4_FRAME,  ALTREF_FRAME}},
  {NEWMV,     {LAST4_FRAME,  ALTREF_FRAME}},
#endif  // CONFIG_EXT_REFS
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  {NEARMV,    {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEWMV,     {GOLDEN_FRAME, ALTREF_FRAME}},

  {ZEROMV,    {LAST_FRAME,   ALTREF_FRAME}},
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#if CONFIG_EXT_REFS
  {ZEROMV,    {LAST3_FRAME,  ALTREF_FRAME}},
  {ZEROMV,    {LAST2_FRAME,  ALTREF_FRAME}},
  {ZEROMV,    {LAST4_FRAME,  ALTREF_FRAME}},
#endif  // CONFIG_EXT_REFS
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  {ZEROMV,    {GOLDEN_FRAME, ALTREF_FRAME}},
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#endif  // CONFIG_EXT_INTER
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  {H_PRED,    {INTRA_FRAME,  NONE}},
  {V_PRED,    {INTRA_FRAME,  NONE}},
  {D135_PRED, {INTRA_FRAME,  NONE}},
  {D207_PRED, {INTRA_FRAME,  NONE}},
  {D153_PRED, {INTRA_FRAME,  NONE}},
  {D63_PRED,  {INTRA_FRAME,  NONE}},
  {D117_PRED, {INTRA_FRAME,  NONE}},
  {D45_PRED,  {INTRA_FRAME,  NONE}},
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#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}},

  {ZEROMV,    {LAST4_FRAME,  INTRA_FRAME}},
  {NEARESTMV, {LAST4_FRAME,  INTRA_FRAME}},
  {NEARMV,    {LAST4_FRAME,  INTRA_FRAME}},
  {NEWMV,     {LAST4_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}},

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

static const REF_DEFINITION vp10_ref_order[MAX_REFS] = {
  {{LAST_FRAME,   NONE}},
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#if CONFIG_EXT_REFS
  {{LAST2_FRAME,  NONE}},
  {{LAST3_FRAME,  NONE}},
  {{LAST4_FRAME,  NONE}},
#endif  // CONFIG_EXT_REFS
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  {{GOLDEN_FRAME, NONE}},
  {{ALTREF_FRAME, NONE}},
  {{LAST_FRAME,   ALTREF_FRAME}},
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#if CONFIG_EXT_REFS
  {{LAST2_FRAME,  ALTREF_FRAME}},
  {{LAST3_FRAME,  ALTREF_FRAME}},
  {{LAST4_FRAME,  ALTREF_FRAME}},
#endif  // CONFIG_EXT_REFS
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  {{GOLDEN_FRAME, ALTREF_FRAME}},
  {{INTRA_FRAME,  NONE}},
};

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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) * vp10_cost_bit(128, 0);
  else
    return l * vp10_cost_bit(128, 0);
}

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static void swap_block_ptr(MACROBLOCK *x, PICK_MODE_CONTEXT *ctx,
                           int m, int n, int min_plane, int max_plane) {
  int i;

  for (i = min_plane; i < max_plane; ++i) {
    struct macroblock_plane *const p = &x->plane[i];
    struct macroblockd_plane *const pd = &x->e_mbd.plane[i];

    p->coeff    = ctx->coeff_pbuf[i][m];
    p->qcoeff   = ctx->qcoeff_pbuf[i][m];
    pd->dqcoeff = ctx->dqcoeff_pbuf[i][m];
    p->eobs     = ctx->eobs_pbuf[i][m];

    ctx->coeff_pbuf[i][m]   = ctx->coeff_pbuf[i][n];
    ctx->qcoeff_pbuf[i][m]  = ctx->qcoeff_pbuf[i][n];
    ctx->dqcoeff_pbuf[i][m] = ctx->dqcoeff_pbuf[i][n];
    ctx->eobs_pbuf[i][m]    = ctx->eobs_pbuf[i][n];

    ctx->coeff_pbuf[i][n]   = p->coeff;
    ctx->qcoeff_pbuf[i][n]  = p->qcoeff;
    ctx->dqcoeff_pbuf[i][n] = pd->dqcoeff;
    ctx->eobs_pbuf[i][n]    = p->eobs;
  }
}

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// 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 0.05

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typedef enum {
  DCT_1D = 0,
  ADST_1D = 1,
  FLIPADST_1D = 2,
  DST_1D = 3,
  TX_TYPES_1D = 4,
} TX_TYPE_1D;

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static void get_energy_distribution_fine(const VP10_COMP *cpi,
                                         BLOCK_SIZE bsize,
                                         uint8_t *src, int src_stride,
                                         uint8_t *dst, int dst_stride,
                                         double *hordist, double *verdist) {
  int bw = 4 << (b_width_log2_lookup[bsize]);
  int bh = 4 << (b_height_log2_lookup[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 - 6;
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  if (f_index < 0) {
    int i, j, index;
    int w_shift = bw == 8 ? 1 : 2;
    int h_shift = bh == 8 ? 1 : 2;
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#if CONFIG_VP9_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_VP9_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_VP9_HIGHBITDEPTH
    }
#endif  // CONFIG_VP9_HIGHBITDEPTH
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  } 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];
}

int adst_vs_flipadst(const VP10_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_dst(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 << DST_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 << (DST_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%
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static int prune_two_for_sby(const VP10_COMP *cpi,
                             BLOCK_SIZE bsize,
                             MACROBLOCK *x,
                             MACROBLOCKD *xd) {
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  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;
  vp10_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) |
         dct_vs_dst(p->src_diff, bw, bw, bh, &hcorr, &vcorr);
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}

#endif  // CONFIG_EXT_TX

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// Performance drop: 0.3%, Speed improvement: 5%
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static int prune_one_for_sby(const VP10_COMP *cpi,
                             BLOCK_SIZE bsize,
                             MACROBLOCK *x,
                             MACROBLOCKD *xd) {
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  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};
  vp10_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);
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}

static int prune_tx_types(const VP10_COMP *cpi,
                          BLOCK_SIZE bsize,
                          MACROBLOCK *x,
                          MACROBLOCKD *xd) {
  switch (cpi->sf.tx_type_search) {
    case NO_PRUNE:
      return 0;
      break;
    case PRUNE_ONE :
      return prune_one_for_sby(cpi, bsize, x, xd);
      break;
  #if CONFIG_EXT_TX
    case PRUNE_TWO :
      return prune_two_for_sby(cpi, bsize, x, xd);
      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
  static TX_TYPE_1D vtx_tab[TX_TYPES] = {
    DCT_1D,
    ADST_1D,
    DCT_1D,
    ADST_1D,
    FLIPADST_1D,
    DCT_1D,
    FLIPADST_1D,
    ADST_1D,
    FLIPADST_1D,
    DST_1D,
    DCT_1D,
    DST_1D,
    ADST_1D,
    DST_1D,
    FLIPADST_1D,
    DST_1D,
  };
  static TX_TYPE_1D htx_tab[TX_TYPES] = {
    DCT_1D,
    DCT_1D,
    ADST_1D,
    ADST_1D,
    DCT_1D,
    FLIPADST_1D,
    FLIPADST_1D,
    FLIPADST_1D,
    ADST_1D,
    DCT_1D,
    DST_1D,
    ADST_1D,
    DST_1D,
    FLIPADST_1D,
    DST_1D,
    DST_1D,
  };
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  if (tx_type >= IDTX)
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    return 1;
  return !(((prune >> vtx_tab[tx_type]) & 1) |
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         ((prune >> (htx_tab[tx_type] + 8)) & 1));
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#else
  // temporary to avoid compiler warnings
  (void) tx_type;
  (void) prune;
  return 1;
#endif
}

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static void model_rd_for_sb(VP10_COMP *cpi, BLOCK_SIZE bsize,
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                            MACROBLOCK *x, MACROBLOCKD *xd,
                            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 i;
  int64_t rate_sum = 0;
  int64_t dist_sum = 0;
  const int ref = xd->mi[0]->mbmi.ref_frame[0];
  unsigned int sse;
  unsigned int var = 0;
  unsigned int sum_sse = 0;
  int64_t total_sse = 0;
  int skip_flag = 1;
  const int shift = 6;
  int rate;
  int64_t dist;
  const int dequant_shift =
#if CONFIG_VP9_HIGHBITDEPTH
      (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) ?
          xd->bd - 5 :
#endif  // CONFIG_VP9_HIGHBITDEPTH
          3;

  x->pred_sse[ref] = 0;

  for (i = 0; i < MAX_MB_PLANE; ++i) {
    struct macroblock_plane *const p = &x->plane[i];
    struct macroblockd_plane *const pd = &xd->plane[i];
    const BLOCK_SIZE bs = get_plane_block_size(bsize, pd);
    const TX_SIZE max_tx_size = max_txsize_lookup[bs];
    const BLOCK_SIZE unit_size = txsize_to_bsize[max_tx_size];
    const int64_t dc_thr = p->quant_thred[0] >> shift;
    const int64_t ac_thr = p->quant_thred[1] >> shift;
    // The low thresholds are used to measure if the prediction errors are
    // low enough so that we can skip the mode search.
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    const int64_t low_dc_thr = VPXMIN(50, dc_thr >> 2);
    const int64_t low_ac_thr = VPXMIN(80, ac_thr >> 2);
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    int bw_shift = (b_width_log2_lookup[bs] - b_width_log2_lookup[unit_size]);
    int bh_shift = (b_height_log2_lookup[bs] - b_width_log2_lookup[unit_size]);
    int bw = 1 << bw_shift;
    int bh = 1 << bh_shift;
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    int idx, idy;
    int lw = b_width_log2_lookup[unit_size] + 2;
    int lh = b_height_log2_lookup[unit_size] + 2;

    sum_sse = 0;

    for (idy = 0; idy < bh; ++idy) {
      for (idx = 0; idx < bw; ++idx) {
        uint8_t *src = p->src.buf + (idy * p->src.stride << lh) + (idx << lw);
        uint8_t *dst = pd->dst.buf + (idy * pd->dst.stride << lh) + (idx << lh);
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        int block_idx = (idy << bw_shift) + idx;
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        int low_err_skip = 0;

        var = cpi->fn_ptr[unit_size].vf(src, p->src.stride,
                                        dst, pd->dst.stride, &sse);
        x->bsse[(i << 2) + block_idx] = sse;
        sum_sse += sse;

        x->skip_txfm[(i << 2) + block_idx] = SKIP_TXFM_NONE;
        if (!x->select_tx_size) {
          // Check if all ac coefficients can be quantized to zero.
          if (var < ac_thr || var == 0) {
            x->skip_txfm[(i << 2) + block_idx] = SKIP_TXFM_AC_ONLY;

            // Check if dc coefficient can be quantized to zero.
            if (sse - var < dc_thr || sse == var) {
              x->skip_txfm[(i << 2) + block_idx] = SKIP_TXFM_AC_DC;

              if (!sse || (var < low_ac_thr && sse - var < low_dc_thr))
                low_err_skip = 1;
            }
          }
        }

        if (skip_flag && !low_err_skip)
          skip_flag = 0;

        if (i == 0)
          x->pred_sse[ref] += sse;
      }
    }

    total_sse += sum_sse;

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

      if (quantizer < 120)
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        rate = (square_error * (280 - quantizer)) >> (16 - VP9_PROB_COST_SHIFT);
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      else
        rate = 0;
      dist = (square_error * quantizer) >> 8;
      rate_sum += rate;
      dist_sum += dist;
    } else {
      vp10_model_rd_from_var_lapndz(sum_sse, num_pels_log2_lookup[bs],
                                   pd->dequant[1] >> dequant_shift,
                                   &rate, &dist);
      rate_sum += rate;
      dist_sum += dist;
    }
  }

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

int64_t vp10_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 vp10_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_VP9_HIGHBITDEPTH
int64_t vp10_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_VP9_HIGHBITDEPTH

/* The trailing '0' is a terminator which is used inside 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). */
static const int16_t band_counts[TX_SIZES][8] = {
  { 1, 2, 3, 4,  3,   16 - 13, 0 },
  { 1, 2, 3, 4, 11,   64 - 21, 0 },
  { 1, 2, 3, 4, 11,  256 - 21, 0 },
  { 1, 2, 3, 4, 11, 1024 - 21, 0 },
};
static int cost_coeffs(MACROBLOCK *x,
                       int plane, int block,
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#if CONFIG_VAR_TX
                       int coeff_ctx,
#else
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                       ENTROPY_CONTEXT *A, ENTROPY_CONTEXT *L,
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#endif
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                       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 int16_t *band_count = &band_counts[tx_size][1];
  const int eob = p->eobs[block];
  const tran_low_t *const qcoeff = BLOCK_OFFSET(p->qcoeff, block);
  unsigned int (*token_costs)[2][COEFF_CONTEXTS][ENTROPY_TOKENS] =
                   x->token_costs[tx_size][type][is_inter_block(mbmi)];
  uint8_t token_cache[32 * 32];
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#if CONFIG_VAR_TX
  int pt = coeff_ctx;
#else
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  int pt = combine_entropy_contexts(*A, *L);
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#endif
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  int c, cost;
#if CONFIG_VP9_HIGHBITDEPTH
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  const int *cat6_high_cost = vp10_get_high_cost_table(xd->bd);
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#else
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  const int *cat6_high_cost = vp10_get_high_cost_table(8);
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#endif

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#if !CONFIG_VAR_TX && !CONFIG_SUPERTX
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  // 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);
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#endif  // !CONFIG_VAR_TX && !CONFIG_SUPERTX
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  if (eob == 0) {
    // single eob token
    cost = token_costs[0][0][pt][EOB_TOKEN];
    c = 0;
  } else {
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    if (use_fast_coef_costing) {
      int band_left = *band_count++;

      // dc token
      int v = qcoeff[0];
      int16_t prev_t;
      cost = vp10_get_token_cost(v, &prev_t, cat6_high_cost);
      cost += (*token_costs)[0][pt][prev_t];

      token_cache[0] = vp10_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 += vp10_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;
        }
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      }

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      // eob token
      if (band_left)
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        cost += (*token_costs)[0][!prev_t][EOB_TOKEN];
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    } 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 = vp10_get_token_cost(v, &tok, cat6_high_cost);
      cost += (*token_costs)[0][pt][tok];

      token_cache[0] = vp10_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 += vp10_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] = vp10_pt_energy_class[tok];
        if (!--band_left) {
          band_left = *band_count++;
          ++token_costs;
        }
        tok_cost_ptr = &((*token_costs)[!tok]);
      }

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

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#if !CONFIG_VAR_TX
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  // is eob first coefficient;
  *A = *L = (c > 0);
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#endif
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  return cost;
}

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static void dist_block(const VP10_COMP *cpi, MACROBLOCK *x, int plane,
                       int block, int blk_row, int blk_col, TX_SIZE tx_size,
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                       int64_t *out_dist, int64_t *out_sse) {
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  if (cpi->sf.use_transform_domain_distortion) {
    // Transform domain distortion computation is more accurate as it does
    // not involve an inverse transform, but it is less accurate.
    const int ss_txfrm_size = tx_size << 1;
    MACROBLOCKD* const xd = &x->e_mbd;
    const struct macroblock_plane *const p = &x->plane[plane];
    const struct macroblockd_plane *const pd = &xd->plane[plane];
    int64_t this_sse;
    int shift = tx_size == TX_32X32 ? 0 : 2;
    tran_low_t *const coeff = BLOCK_OFFSET(p->coeff, block);
    tran_low_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
#if CONFIG_VP9_HIGHBITDEPTH
    const int bd = (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) ? xd->bd : 8;
    *out_dist = vp10_highbd_block_error(coeff, dqcoeff, 16 << ss_txfrm_size,
                                        &this_sse, bd) >> shift;
#else
    *out_dist = vp10_block_error(coeff, dqcoeff, 16 << ss_txfrm_size,
                                 &this_sse) >> shift;
#endif  // CONFIG_VP9_HIGHBITDEPTH
    *out_sse = this_sse >> shift;
  } else {
    const BLOCK_SIZE tx_bsize = txsize_to_bsize[tx_size];
    const int bs = 4*num_4x4_blocks_wide_lookup[tx_bsize];

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

    const int src_stride = x->plane[plane].src.stride;
    const int dst_stride = xd->plane[plane].dst.stride;
    const int src_idx = 4 * (blk_row * src_stride + blk_col);
    const int dst_idx = 4 * (blk_row * dst_stride + blk_col);
    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);

    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;
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#if CONFIG_VP9_HIGHBITDEPTH
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      DECLARE_ALIGNED(16, uint16_t, recon16[32 * 32]);  // MAX TX_SIZE**2
      uint8_t *recon = (uint8_t*)recon16;
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#else
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      DECLARE_ALIGNED(16, uint8_t, recon[32 * 32]);     // MAX TX_SIZE**2
#endif  // CONFIG_VP9_HIGHBITDEPTH

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

      INV_TXFM_PARAM inv_txfm_param;

      inv_txfm_param.tx_type = get_tx_type(plane_type, xd, block, 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_VP9_HIGHBITDEPTH
      if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
        recon = CONVERT_TO_BYTEPTR(recon);
        inv_txfm_param.bd = xd->bd;
        vpx_highbd_convolve_copy(dst, dst_stride, recon, 32,
                                 NULL, 0, NULL, 0, bs, bs, xd->bd);
        highbd_inv_txfm_add(dqcoeff, recon, 32, &inv_txfm_param);
      } else
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#endif  // CONFIG_VP9_HIGHBITDEPTH
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      {
        vpx_convolve_copy(dst, dst_stride, recon, 32,
                          NULL, 0, NULL, 0, bs, bs);
        inv_txfm_add(dqcoeff, recon, 32, &inv_txfm_param);
      }

      cpi->fn_ptr[tx_bsize].vf(src, src_stride, recon, 32, &tmp);
    }

    *out_dist = (int64_t)tmp * 16;
  }
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}

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static int rate_block(int plane, int block, int blk_row, int blk_col,
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                      TX_SIZE tx_size, struct rdcost_block_args* args) {
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#if CONFIG_VAR_TX
  int coeff_ctx = combine_entropy_contexts(*(args->t_above + blk_col),
                                           *(args->t_left + blk_row));
  int coeff_cost = cost_coeffs(args->x, plane, block, coeff_ctx,
                               tx_size, args->so->scan, args->so->neighbors,
                               args->use_fast_coef_costing);
  const struct macroblock_plane *p = &args->x->plane[plane];
  *(args->t_above + blk_col) = !(p->eobs[block] == 0);
  *(args->t_left  + blk_row) = !(p->eobs[block] == 0);
  return coeff_cost;
#else
  return cost_coeffs(args->x, plane, block,
                     args->t_above + blk_col,
                     args->t_left + blk_row,
                     tx_size, args->so->scan, args->so->neighbors,
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                     args->use_fast_coef_costing);
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#endif  // CONFIG_VAR_TX
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}

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static void block_rd_txfm(int plane, int block, int blk_row, int blk_col,
                          BLOCK_SIZE plane_bsize,
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                          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;
  int64_t rd1, rd2, rd;
  int rate;
  int64_t dist;
  int64_t sse;

  if (args->exit_early)
    return;

  if (!is_inter_block(mbmi)) {
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    struct encode_b_args arg = {x, NULL, &mbmi->skip};
    vp10_encode_block_intra(plane, block, blk_row, blk_col,
                            plane_bsize, tx_size, &arg);
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    if (args->cpi->sf.use_transform_domain_distortion) {
      dist_block(args->cpi, x, plane, block, blk_row, blk_col,
                 tx_size, &dist, &sse);
    } else {
      // Note that the encode block_intra call above already calls
      // inv_txfm_add, so we can't just call dist_block here.
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      const int bs = 4 << tx_size;
      const BLOCK_SIZE tx_bsize = txsize_to_bsize[tx_size];
      const vpx_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 = 4 * num_4x4_blocks_wide_lookup[plane_bsize];

      const uint8_t *src = &p->src.buf[4 * (blk_row * src_stride + blk_col)];
      const uint8_t *dst = &pd->dst.buf[4 * (blk_row * dst_stride + blk_col)];
      const int16_t *diff = &p->src_diff[4 * (blk_row * diff_stride + blk_col)];

      unsigned int tmp;
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      sse = vpx_sum_squares_2d_i16(diff, diff_stride, bs);
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#if CONFIG_VP9_HIGHBITDEPTH
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      if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)
        sse = ROUNDZ_POWER_OF_TWO(sse, (xd->bd - 8) * 2);
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#endif  // CONFIG_VP9_HIGHBITDEPTH
      sse = (int64_t)sse * 16;

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      variance(src, src_stride, dst, dst_stride, &tmp);
      dist = (int64_t)tmp * 16;
    }
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  } else if (max_txsize_lookup[plane_bsize] == tx_size) {
    if (x->skip_txfm[(plane << 2) + (block >> (tx_size << 1))] ==
        SKIP_TXFM_NONE) {
      // full forward transform and quantization
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      vp10_xform_quant(x, plane, block, blk_row, blk_col,
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                       plane_bsize, tx_size, VP10_XFORM_QUANT_B);
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      dist_block(args->cpi, x, plane, block, blk_row, blk_col,
                 tx_size, &dist, &sse);
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    } else if (x->skip_txfm[(plane << 2) + (block >> (tx_size << 1))] ==
               SKIP_TXFM_AC_ONLY) {
      // compute DC coefficient
      tran_low_t *const coeff   = BLOCK_OFFSET(x->plane[plane].coeff, block);
      tran_low_t *const dqcoeff = BLOCK_OFFSET(xd->plane[plane].dqcoeff, block);
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      vp10_xform_quant(x, plane, block, blk_row, blk_col,
                          plane_bsize, tx_size, VP10_XFORM_QUANT_DC);
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      sse  = x->bsse[(plane << 2) + (block >> (tx_size << 1))] << 4;
      dist = sse;
      if (x->plane[plane].eobs[block]) {
        const int64_t orig_sse = (int64_t)coeff[0] * coeff[0];
        const int64_t resd_sse = coeff[0] - dqcoeff[0];
        int64_t dc_correct = orig_sse - resd_sse * resd_sse;
#if CONFIG_VP9_HIGHBITDEPTH
        dc_correct >>= ((xd->bd - 8) * 2);
#endif
        if (tx_size != TX_32X32)
          dc_correct >>= 2;

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        dist = VPXMAX(0, sse - dc_correct);
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      }
    } else {
      // SKIP_TXFM_AC_DC
      // skip forward transform
      x->plane[plane].eobs[block] = 0;
      sse  = x->bsse[(plane << 2) + (block >> (tx_size << 1))] << 4;
      dist = sse;
    }
  } else {
    // full forward transform and quantization
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    vp10_xform_quant(x, plane, block, blk_row, blk_col, plane_bsize, tx_size,
                     VP10_XFORM_QUANT_B);
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    dist_block(args->cpi, x, plane, block, blk_row, blk_col,
               tx_size, &dist, &sse);
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  }

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

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  rate = rate_block(plane, block, blk_row, blk_col, tx_size, args);
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  rd1 = RDCOST(x->rdmult, x->rddiv, rate, dist);
  rd2 = RDCOST(x->rdmult, x->rddiv, 0, sse);

  // TODO(jingning): temporarily enabled only for luma component
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  rd = VPXMIN(rd1, rd2);
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  if (plane == 0)
    x->zcoeff_blk[tx_size][block] = !x->plane[plane].eobs[block] ||
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        (rd1 > rd2 && !xd->lossless[mbmi->segment_id]);
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  args->this_rate += rate;
  args->this_dist += dist;
  args->this_sse += sse;
  args->this_rd += rd;

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

  args->skippable &= !x->plane[plane].eobs[block];
}

static void txfm_rd_in_plane(MACROBLOCK *x,
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                             const VP10_COMP *cpi,
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                             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) {
  MACROBLOCKD *const xd = &x->e_mbd;
  const struct macroblockd_plane *const pd = &xd->plane[plane];
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  TX_TYPE tx_type;
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  struct rdcost_block_args args;
  vp10_zero(args);
  args.x = x;
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  args.cpi = cpi;
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  args.best_rd = ref_best_rd;
  args.use_fast_coef_costing = use_fast_coef_casting;
  args.skippable = 1;

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

  vp10_get_entropy_contexts(bsize, tx_size, pd, args.t_above, args.t_left);

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  tx_type = get_tx_type(pd->plane_type, xd, 0, tx_size);
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  args.so = get_scan(tx_size, tx_type, is_inter_block(&xd->mi[0]->mbmi));
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  vp10_foreach_transformed_block_in_plane(xd, bsize, plane,
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                                          block_rd_txfm, &args);
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  if (args.exit_early) {
    *rate       = INT_MAX;
    *distortion = INT64_MAX;
    *sse        = INT64_MAX;
    *skippable  = 0;
  } else {
    *distortion = args.this_dist;
    *rate       = args.this_rate;
    *sse        = args.this_sse;
    *skippable  = args.skippable;
  }
}

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#if CONFIG_SUPERTX
void vp10_txfm_rd_in_plane_supertx(MACROBLOCK *x,
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                                   const VP10_COMP *cpi,
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                                   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) {
  MACROBLOCKD *const xd = &x->e_mbd;
  const struct macroblockd_plane *const pd = &xd->plane[plane];
  struct rdcost_block_args args;
  TX_TYPE tx_type;

  vp10_zero(args);
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  args.cpi = cpi;
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  args.x = x;
  args.best_rd = ref_best_rd;
  args.use_fast_coef_costing = use_fast_coef_casting;

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

  vp10_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.so = get_scan(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.this_dist;
    *rate       = args.this_rate;
    *sse        = args.this_sse;
    *skippable  = !x->plane[plane].eobs[0];
  }
}
#endif  // CONFIG_SUPERTX

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static void choose_largest_tx_size(VP10_COMP *cpi, MACROBLOCK *x,
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                                   int *rate, int64_t *distortion,
                                   int *skip, int64_t *sse,
                                   int64_t ref_best_rd,
                                   BLOCK_SIZE bs) {
  const TX_SIZE max_tx_size = max_txsize_lookup[bs];
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  VP10_COMMON *const cm = &cpi->common;
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  const TX_SIZE largest_tx_size = tx_mode_to_biggest_tx_size[cm->tx_mode];
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
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  TX_TYPE tx_type, best_tx_type = DCT_DCT;
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  int r, s;
  int64_t d, psse, this_rd, best_rd = INT64_MAX;
  vpx_prob skip_prob = vp10_get_skip_prob(cm, xd);
  int  s0 = vp10_cost_bit(skip_prob, 0);
  int  s1 = vp10_cost_bit(skip_prob, 1);
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  const int is_inter = is_inter_block(mbmi);
  int prune = 0;
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#if CONFIG_EXT_TX
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  int ext_tx_set;
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#endif  // CONFIG_EXT_TX
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  if (is_inter && cpi->sf.tx_type_search > 0)
    prune = prune_tx_types(cpi, bs, x, xd);
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  mbmi->tx_size = VPXMIN(max_tx_size, largest_tx_size);
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#if CONFIG_EXT_TX
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  ext_tx_set = get_ext_tx_set(mbmi->tx_size, bs, is_inter);

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  if (get_ext_tx_types(mbmi->tx_size, bs, is_inter) > 1 &&
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      !xd->lossless[mbmi->segment_id]) {
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    for (tx_type = 0; tx_type < TX_TYPES; ++tx_type) {
      if (is_inter) {
        if (!ext_tx_used_inter[ext_tx_set][tx_type])
          continue;
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        if (cpi->sf.tx_type_search > 0) {
          if (!do_tx_type_search(tx_type, prune))
            continue;
        } else if (ext_tx_set == 1 &&
                   tx_type >= DST_ADST && tx_type < IDTX &&
                   best_tx_type == DCT_DCT) {
          tx_type = IDTX - 1;
          continue;
        }
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      } else {
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        if (!ALLOW_INTRA_EXT_TX && bs >= BLOCK_8X8) {
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          if (tx_type != intra_mode_to_tx_type_context[mbmi->mode])
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            continue;
        }
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        if (!ext_tx_used_intra[ext_tx_set][tx_type])
          continue;
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        if (ext_tx_set == 1 &&
            tx_type >= DST_ADST && tx_type < IDTX &&
            best_tx_type == DCT_DCT) {
          tx_type = IDTX - 1;
          continue;
        }
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      }

      mbmi->tx_type = tx_type;
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      txfm_rd_in_plane(x,
                       cpi,
                       &r, &d, &s,
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                       &psse, ref_best_rd, 0, bs, mbmi->tx_size,
                       cpi->sf.use_fast_coef_costing);

      if (r == INT_MAX)
        continue;
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      if (get_ext_tx_types(mbmi->tx_size, bs, is_inter) > 1) {
        if (is_inter) {
          if (ext_tx_set > 0)
            r += cpi->inter_tx_type_costs[ext_tx_set]
                                         [mbmi->tx_size][mbmi->tx_type];
        } else {
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          if (ext_tx_set > 0 && ALLOW_INTRA_EXT_TX)
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            r += cpi->intra_tx_type_costs[ext_tx_set][mbmi->tx_size]
                                         [mbmi->mode][mbmi->tx_type];
        }
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      }
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      if (s)
        this_rd = RDCOST(x->rdmult, x->rddiv, s1, psse);
      else
        this_rd = RDCOST(x->rdmult, x->rddiv, r + s0, d);
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      if (is_inter_block(mbmi) && !xd->lossless[mbmi->segment_id] && !s)
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        this_rd = VPXMIN(this_rd, RDCOST(x->rdmult, x->rddiv, s1, psse));

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      if (this_rd < ((best_tx_type == DCT_DCT) ? ext_tx_th : 1) * best_rd) {
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        best_rd = this_rd;
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        best_tx_type = mbmi->tx_type;
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      }
    }
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  }
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#else  // CONFIG_EXT_TX
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  if (mbmi->tx_size < TX_32X32 &&
      !xd->lossless[mbmi->segment_id]) {
    for (tx_type = 0; tx_type < TX_TYPES; ++tx_type) {
      mbmi->tx_type = tx_type;
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      txfm_rd_in_plane(x,
                       cpi,
                       &r, &d, &s,
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                       &psse, ref_best_rd, 0, bs, mbmi->tx_size,
                       cpi->sf.use_fast_coef_costing);
      if (r == INT_MAX)
        continue;
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      if (is_inter) {
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        r += cpi->inter_tx_type_costs[mbmi->tx_size][mbmi->tx_type];
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        if (cpi->sf.tx_type_search > 0 && !do_tx_type_search(tx_type, prune))
            continue;
      } else {
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        r += cpi->intra_tx_type_costs[mbmi->tx_size]
                                     [intra_mode_to_tx_type_context[mbmi->mode]]
                                     [mbmi->tx_type];
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      }
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      if (s)
        this_rd = RDCOST(x->rdmult, x->rddiv, s1, psse);
      else
        this_rd = RDCOST(x->rdmult, x->rddiv, r + s0, d);
      if (is_inter && !xd->lossless[mbmi->segment_id] && !s)
        this_rd = VPXMIN(this_rd, RDCOST(x->rdmult, x->rddiv, s1, psse));
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      if (this_rd < ((best_tx_type == DCT_DCT) ? ext_tx_th : 1) * best_rd) {
        best_rd = this_rd;
        best_tx_type = mbmi->tx_type;
      }
    }
  }
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#endif  // CONFIG_EXT_TX
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  mbmi->tx_type = best_tx_type;
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  txfm_rd_in_plane(x,
                   cpi,
                   rate, distortion, skip,
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                   sse, ref_best_rd, 0, bs,
                   mbmi->tx_size, cpi->sf.use_fast_coef_costing);
}

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static void choose_smallest_tx_size(VP10_COMP *cpi, MACROBLOCK *x,
                                    int *rate, int64_t *distortion,
                                    int *skip, int64_t *sse,
                                    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;
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  mbmi->tx_type = DCT_DCT;
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  txfm_rd_in_plane(x,
                   cpi,
                   rate, distortion, skip,
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                   sse, ref_best_rd, 0, bs,
                   mbmi->tx_size, cpi->sf.use_fast_coef_costing);
}

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static void choose_tx_size_from_rd(VP10_COMP *cpi, MACROBLOCK *x,
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                                   int *rate,
                                   int64_t *distortion,
                                   int *skip,
                                   int64_t *psse,
                                   int64_t ref_best_rd,
                                   BLOCK_SIZE bs) {
  const TX_SIZE max_tx_size = max_txsize_lookup[bs];
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  VP10_COMMON *const cm = &cpi->common;
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  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  vpx_prob skip_prob = vp10_get_skip_prob(cm, xd);
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  int r, s;
  int64_t d, sse;
  int64_t rd = INT64_MAX;
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  int n;
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  int s0, s1;
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  int64_t best_rd = INT64_MAX, last_rd = INT64_MAX;
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  TX_SIZE best_tx = max_tx_size;
  int start_tx, end_tx;
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  const int tx_select = cm->tx_mode == TX_MODE_SELECT;
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  const int is_inter = is_inter_block(mbmi);
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  TX_TYPE tx_type, best_tx_type = DCT_DCT;
  int prune = 0;
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#if CONFIG_EXT_TX
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  int ext_tx_set;
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#endif  // CONFIG_EXT_TX

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  if (is_inter && cpi->sf.tx_type_search > 0)
    prune = prune_tx_types(cpi, bs, x, xd);

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  assert(skip_prob > 0);
  s0 = vp10_cost_bit(skip_prob, 0);
  s1 = vp10_cost_bit(skip_prob, 1);

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  if (tx_select) {
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    start_tx = max_tx_size;
    end_tx = 0;
  } else {
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    const TX_SIZE chosen_tx_size =
        VPXMIN(max_tx_size, tx_mode_to_biggest_tx_size[cm->tx_mode]);
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    start_tx = chosen_tx_size;
    end_tx = chosen_tx_size;
  }

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  *distortion = INT64_MAX;
  *rate       = INT_MAX;
  *skip       = 0;
  *psse       = INT64_MAX;

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  for (tx_type = DCT_DCT; tx_type < TX_TYPES; ++tx_type) {
    last_rd = INT64_MAX;
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    for (n = start_tx; n >= end_tx; --n) {
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      const int r_tx_size =
          cpi->tx_size_cost[max_tx_size - TX_8X8][get_tx_size_context(xd)][n];
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      if (FIXED_TX_TYPE && tx_type != get_default_tx_type(0, xd, 0, n))
          continue;
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#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;
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        if (cpi->sf.tx_type_search > 0) {
          if (!do_tx_type_search(tx_type, prune))
            continue;
        } else if (ext_tx_set == 1 &&
                   tx_type >= DST_ADST && tx_type < IDTX &&
                   best_tx_type == DCT_DCT) {
          tx_type = IDTX - 1;
          continue;
        }
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      } else {
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        if (!ALLOW_INTRA_EXT_TX && bs >= BLOCK_8X8) {
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          if (tx_type != intra_mode_to_tx_type_context[mbmi->mode])
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            continue;
        }
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        if (!ext_tx_used_intra[ext_tx_set][tx_type])
          continue;
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        if (ext_tx_set == 1 &&
            tx_type >= DST_ADST && tx_type < IDTX &&
            best_tx_type == DCT_DCT) {
          tx_type = IDTX - 1;
          break;
        }
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      }
      mbmi->tx_type = tx_type;
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      txfm_rd_in_plane(x,
                       cpi,
                       &r, &d, &s,
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                       &sse, ref_best_rd, 0, bs, n,
                       cpi->sf.use_fast_coef_costing);
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      if (get_ext_tx_types(n, bs, is_inter) > 1 &&
          !xd->lossless[xd->mi[0]->mbmi.segment_id] &&
          r != INT_MAX) {
        if (is_inter) {
          if (ext_tx_set > 0)
            r += cpi->inter_tx_type_costs[ext_tx_set]
                                         [mbmi->tx_size][mbmi->tx_type];
        } else {
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          if (ext_tx_set > 0 && ALLOW_INTRA_EXT_TX)
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            r += cpi->intra_tx_type_costs[ext_tx_set][mbmi->tx_size]
                                         [mbmi->mode][mbmi->tx_type];
        }
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      }
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#else  // CONFIG_EXT_TX
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      if (n >= TX_32X32 && tx_type != DCT_DCT) {
        continue;
      }
      mbmi->tx_type = tx_type;
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      txfm_rd_in_plane(x,
                       cpi,
                       &r, &d, &s,
                       &sse, ref_best_rd, 0, bs, n,
                       cpi->sf.use_fast_coef_costing);
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      if (n < TX_32X32 &&
          !xd->lossless[xd->mi[0]->mbmi.segment_id] &&
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          r != INT_MAX && !FIXED_TX_TYPE) {
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        if (is_inter) {
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          r += cpi->inter_tx_type_costs[mbmi->tx_size][mbmi->tx_type];
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          if (cpi->sf.tx_type_search > 0 && !do_tx_type_search(tx_type, prune))
              continue;
        } else {
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          r += cpi->intra_tx_type_costs[mbmi->tx_size]
              [intra_mode_to_tx_type_context[mbmi->mode]]
              [mbmi->tx_type];
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        }
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      }
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#endif  // CONFIG_EXT_TX
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      if (r == INT_MAX)
        continue;

      if (s) {
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        if (is_inter) {
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          rd = RDCOST(x->rdmult, x->rddiv, s1, sse);
        } else {
          rd =  RDCOST(x->rdmult, x->rddiv, s1 + r_tx_size * tx_select, sse);
        }
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      } else {
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        rd = RDCOST(x->rdmult, x->rddiv, r + s0 + r_tx_size * tx_select, d);
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      }
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      if (tx_select && !(s && is_inter))
        r += r_tx_size;

      if (is_inter && !xd->lossless[xd->mi[0]->mbmi.segment_id] && !s)
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        rd = VPXMIN(rd, RDCOST(x->rdmult, x->rddiv, s1, sse));
1618

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      // Early termination in transform size search.
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      if (cpi->sf.tx_size_search_breakout &&
          (rd == INT64_MAX ||
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           (s == 1 && tx_type != DCT_DCT && n < start_tx) ||
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           (n < (int) max_tx_size && rd > last_rd)))
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        break;
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      last_rd = rd;
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      if (rd <
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          (is_inter && best_tx_type == DCT_DCT ? ext_tx_th : 1) *
          best_rd) {
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        best_tx = n;
        best_rd = rd;
        *distortion = d;
        *rate       = r;
        *skip       = s;
        *psse       = sse;
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        best_tx_type = mbmi->tx_type;
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      }
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    }
  }
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  mbmi->tx_size = best_tx;
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  mbmi->tx_type = best_tx_type;
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#if !CONFIG_EXT_TX
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  if (mbmi->tx_size >= TX_32X32)
    assert(mbmi->tx_type == DCT_DCT);
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#endif

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  txfm_rd_in_plane(x,
                   cpi,
                   &r, &d, &s,
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                   &sse, ref_best_rd, 0, bs, best_tx,
                   cpi->sf.use_fast_coef_costing);
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}

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static void super_block_yrd(VP10_COMP *cpi, MACROBLOCK *x, int *rate,
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                            int64_t *distortion, int *skip,
                            int64_t *psse, BLOCK_SIZE bs,
                            int64_t ref_best_rd) {
  MACROBLOCKD *xd = &x->e_mbd;
  int64_t sse;
  int64_t *ret_sse = psse ? psse : &sse;

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

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  if (xd->lossless[xd->mi[0]->mbmi.segment_id]) {
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    choose_smallest_tx_size(cpi, x, rate, distortion, skip, ret_sse,
                            ref_best_rd, bs);
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  } else if (cpi->sf.tx_size_search_method == USE_LARGESTALL) {
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    choose_largest_tx_size(cpi, x, rate, distortion, skip, ret_sse, ref_best_rd,
                           bs);
  } else {
    choose_tx_size_from_rd(cpi, x, rate, distortion, skip, ret_sse,
                           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;
}

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static int rd_pick_palette_intra_sby(VP10_COMP *cpi, MACROBLOCK *x,
                                     BLOCK_SIZE bsize,
                                     int palette_ctx, int dc_mode_cost,
                                     PALETTE_MODE_INFO *palette_mode_info,
                                     uint8_t *best_palette_color_map,
                                     TX_SIZE *best_tx,
                                     PREDICTION_MODE *mode_selected,
                                     int64_t *best_rd) {
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  MACROBLOCKD *const xd = &x->e_mbd;
  MODE_INFO *const mic = xd->mi[0];
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  const int rows = 4 * num_4x4_blocks_high_lookup[bsize];
  const int cols = 4 * num_4x4_blocks_wide_lookup[bsize];
  int this_rate, this_rate_tokenonly, s, colors, n;
  int rate_overhead = 0;
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  int64_t this_distortion, this_rd;
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  const int src_stride = x->plane[0].src.stride;
  const uint8_t *const src = x->plane[0].src.buf;
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#if CONFIG_VP9_HIGHBITDEPTH
  if (cpi->common.use_highbitdepth)
    colors = vp10_count_colors_highbd(src, src_stride, rows, cols,
                                      cpi->common.bit_depth);
  else
#endif  // CONFIG_VP9_HIGHBITDEPTH
    colors = vp10_count_colors(src, src_stride, rows, cols);
  palette_mode_info->palette_size[0] = 0;
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#if CONFIG_EXT_INTRA
  mic->mbmi.ext_intra_mode_info.use_ext_intra_mode[0] = 0;
#endif  // CONFIG_EXT_INTRA
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  if (colors > 1 && colors <= 64 && cpi->common.allow_screen_content_tools) {
    int r, c, i, j, k;
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    const int max_itr = 50;
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    int color_ctx, color_idx = 0;
    int color_order[PALETTE_MAX_SIZE];
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    double *const data = x->palette_buffer->kmeans_data_buf;
    uint8_t *const indices = x->palette_buffer->kmeans_indices_buf;
    uint8_t *const pre_indices = x->palette_buffer->kmeans_pre_indices_buf;
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    double centroids[PALETTE_MAX_SIZE];
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    uint8_t *const color_map = xd->plane[0].color_index_map;
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    double lb, ub, val;
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    MB_MODE_INFO *const mbmi = &mic->mbmi;
    PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info;
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#if CONFIG_VP9_HIGHBITDEPTH
    uint16_t *src16 = CONVERT_TO_SHORTPTR(src);
    if (cpi->common.use_highbitdepth)
      lb = ub = src16[0];
    else
#endif  // CONFIG_VP9_HIGHBITDEPTH
      lb = ub = src[0];

#if CONFIG_VP9_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_VP9_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_VP9_HIGHBITDEPTH
    }
#endif  // CONFIG_VP9_HIGHBITDEPTH

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    mbmi->mode = DC_PRED;
#if CONFIG_EXT_INTRA
    mbmi->ext_intra_mode_info.use_ext_intra_mode[0] = 0;
#endif  // CONFIG_EXT_INTRA
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    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;
      vp10_k_means(data, centroids, indices, pre_indices, rows * cols,
                   n, 1, max_itr);
      vp10_insertion_sort(centroids, n);
      for (i = 0; i < n; ++i)
        centroids[i] = round(centroids[i]);
      // remove duplicates
      i = 1;
      k = n;
      while (i < k) {
        if (centroids[i] == centroids[i - 1]) {
          j = i;
          while (j < k - 1) {
            centroids[j] = centroids[j + 1];
            ++j;
          }
          --k;
        } else {
          ++i;
        }
      }

#if CONFIG_VP9_HIGHBITDEPTH
      if (cpi->common.use_highbitdepth)
        for (i = 0; i < k; ++i)
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          pmi->palette_colors[i] = clip_pixel_highbd((int)round(centroids[i]),
                                                     cpi->common.bit_depth);
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      else
#endif  // CONFIG_VP9_HIGHBITDEPTH
        for (i = 0; i < k; ++i)
          pmi->palette_colors[i] = clip_pixel((int)round(centroids[i]));
      pmi->palette_size[0] = k;

      vp10_calc_indices(data, centroids, indices, rows * cols, k, 1);
      for (r = 0; r < rows; ++r)
        for (c = 0; c < cols; ++c)
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          color_map[r * cols + c] = indices[r * cols + c];
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      super_block_yrd(cpi, x, &this_rate_tokenonly, &this_distortion,
                      &s, NULL, bsize, *best_rd);
      if (this_rate_tokenonly == INT_MAX)
        continue;

      this_rate = this_rate_tokenonly + dc_mode_cost +
          cpi->common.bit_depth * k * vp10_cost_bit(128, 0) +
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          cpi->palette_y_size_cost[bsize - BLOCK_8X8][k - 2] +
          write_uniform_cost(k, color_map[0]) +
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          vp10_cost_bit(vp10_default_palette_y_mode_prob[bsize - BLOCK_8X8]
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                                                        [palette_ctx], 1);
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      for (i = 0; i < rows; ++i) {
        for (j = (i == 0 ? 1 : 0); j < cols; ++j) {
          color_ctx = vp10_get_palette_color_context(color_map, cols, i, j,
                                                     k, color_order);
          for (r = 0; r < k; ++r)
            if (color_map[i * cols + j] == color_order[r]) {
              color_idx = r;
              break;
            }
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          assert(color_idx >= 0 && color_idx < k);
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          this_rate +=
              cpi->palette_y_color_cost[k - 2][color_ctx][color_idx];
        }
      }
      this_rd = RDCOST(x->rdmult, x->rddiv, this_rate, this_distortion);

      if (this_rd < *best_rd) {
        *best_rd = this_rd;
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        *palette_mode_info = *pmi;
        memcpy(best_palette_color_map, color_map,
               rows * cols * sizeof(color_map[0]));
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        *mode_selected = DC_PRED;
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        *best_tx = mbmi->tx_size;
        rate_overhead = this_rate - this_rate_tokenonly;
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      }
    }
  }
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  return rate_overhead;
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}

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static int64_t rd_pick_intra4x4block(VP10_COMP *cpi, MACROBLOCK *x,
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                                     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, int64_t rd_thresh) {
  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 * src_stride + col * 4];
  ENTROPY_CONTEXT ta[2], tempa[2];
  ENTROPY_CONTEXT tl[2], templ[2];
  const int num_4x4_blocks_wide = num_4x4_blocks_wide_lookup[bsize];
  const int num_4x4_blocks_high = num_4x4_blocks_high_lookup[bsize];
  int idx, idy;
  uint8_t best_dst[8 *