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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))

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#else  // CONFIG_EXT_REFS

#if CONFIG_BIDIR_PRED

#define LAST_FRAME_MODE_MASK    ((1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME) | \
                                 (1 << BWDREF_FRAME) | (1 << INTRA_FRAME))
#define GOLDEN_FRAME_MODE_MASK  ((1 << LAST_FRAME) | (1 << ALTREF_FRAME) | \
                                 (1 << BWDREF_FRAME) | (1 << INTRA_FRAME))
#define BWD_REF_MODE_MASK       ((1 << LAST_FRAME) | (1 << GOLDEN_FRAME) | \
                                 (1 << ALTREF_FRAME) | (1 << INTRA_FRAME))
// TODO(zoeliu): To rename the following to ALTREF_MODE_MASK
#define ALT_REF_MODE_MASK       ((1 << LAST_FRAME) | (1 << GOLDEN_FRAME) | \
                                 (1 << BWDREF_FRAME) | (1 << INTRA_FRAME))


#else  // CONFIG_BIDIR_PRED
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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_BIDIR_PRED

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#endif  // CONFIG_EXT_REFS

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#if !CONFIG_EXT_REFS && CONFIG_BIDIR_PRED
#define SECOND_REF_FRAME_MASK   ((1 << ALTREF_FRAME) | (1 << BWDREF_FRAME) | \
                                 0x01)
#else
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#define SECOND_REF_FRAME_MASK   ((1 << ALTREF_FRAME) | 0x01)
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#endif  // !CONFIG_EXT_REFS && CONFIG_BIDIR_PRED
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#define MIN_EARLY_TERM_INDEX    3
#define NEW_MV_DISCOUNT_FACTOR  8

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

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const double ADST_FLIP_SVM[8] = {-6.6623, -2.8062, -3.2531, 3.1671,  // vert
                                 -7.7051, -3.2234, -3.6193, 3.4533};  // 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;
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  ENTROPY_CONTEXT t_above[2 * MAX_MIB_SIZE];
  ENTROPY_CONTEXT t_left[2 * MAX_MIB_SIZE];
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  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}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {NEARESTMV, {BWDREF_FRAME, NONE}},
#endif  // CONFIG_BIDIR_PRED
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#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}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {NEWMV,     {BWDREF_FRAME, NONE}},
#endif  // CONFIG_BIDIR_PRED
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#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}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {NEARMV,    {BWDREF_FRAME, NONE}},
#endif  // CONFIG_BIDIR_PRED
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#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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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {NEWFROMNEARMV,    {BWDREF_FRAME, NONE}},
#endif  // CONFIG_BIDIR_PRED
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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}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {ZEROMV,    {BWDREF_FRAME, NONE}},
#endif  // CONFIG_BIDIR_PRED
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#endif  // CONFIG_EXT_REFS
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  {ZEROMV,    {GOLDEN_FRAME, NONE}},
  {ZEROMV,    {ALTREF_FRAME, NONE}},

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

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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}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {NEAREST_NEARESTMV, {LAST_FRAME,   BWDREF_FRAME}},
  {NEAREST_NEARESTMV, {GOLDEN_FRAME, BWDREF_FRAME}},
#endif  // CONFIG_BIDIR_PRED
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#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}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {NEARESTMV, {LAST_FRAME,   BWDREF_FRAME}},
  {NEARESTMV, {GOLDEN_FRAME, BWDREF_FRAME}},
#endif  // CONFIG_BIDIR_PRED
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#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}},
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  {NEAR_NEARMV,    {LAST_FRAME,   ALTREF_FRAME}},
  {NEAR_NEARMV,    {GOLDEN_FRAME, ALTREF_FRAME}},
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  {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}},
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  {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}},
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  {NEAR_NEARMV,    {LAST2_FRAME,  ALTREF_FRAME}},
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  {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}},
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  {NEAR_NEARMV,    {LAST3_FRAME,  ALTREF_FRAME}},
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  {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}},
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  {NEAR_NEARMV,    {LAST4_FRAME,  ALTREF_FRAME}},
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  {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}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {NEAR_NEARESTMV, {LAST_FRAME,   BWDREF_FRAME}},
  {NEAR_NEARESTMV, {GOLDEN_FRAME, BWDREF_FRAME}},
  {NEAREST_NEARMV, {LAST_FRAME,   BWDREF_FRAME}},
  {NEAREST_NEARMV, {GOLDEN_FRAME, BWDREF_FRAME}},
  {NEW_NEARESTMV,  {LAST_FRAME,   BWDREF_FRAME}},
  {NEW_NEARESTMV,  {GOLDEN_FRAME, BWDREF_FRAME}},
  {NEAREST_NEWMV,  {LAST_FRAME,   BWDREF_FRAME}},
  {NEAREST_NEWMV,  {GOLDEN_FRAME, BWDREF_FRAME}},
  {NEW_NEARMV,     {LAST_FRAME,   BWDREF_FRAME}},
  {NEW_NEARMV,     {GOLDEN_FRAME, BWDREF_FRAME}},
  {NEAR_NEWMV,     {LAST_FRAME,   BWDREF_FRAME}},
  {NEAR_NEWMV,     {GOLDEN_FRAME, BWDREF_FRAME}},
  {NEW_NEWMV,      {LAST_FRAME,   BWDREF_FRAME}},
  {NEW_NEWMV,      {GOLDEN_FRAME, BWDREF_FRAME}},
  {ZERO_ZEROMV,    {LAST_FRAME,   BWDREF_FRAME}},
  {ZERO_ZEROMV,    {GOLDEN_FRAME, BWDREF_FRAME}},
#endif  // CONFIG_BIDIR_PRED
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#endif  // CONFIG_EXT_REFS
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#else  // CONFIG_EXT_INTER

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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}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {NEARMV,    {LAST_FRAME,   BWDREF_FRAME}},
  {NEWMV,     {LAST_FRAME,   BWDREF_FRAME}},
  {NEARMV,    {GOLDEN_FRAME, BWDREF_FRAME}},
  {NEWMV,     {GOLDEN_FRAME, BWDREF_FRAME}},
#endif  // CONFIG_BIDIR_PRED
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#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}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {ZEROMV,    {LAST_FRAME,   BWDREF_FRAME}},
  {ZEROMV,    {GOLDEN_FRAME, BWDREF_FRAME}},
#endif  // CONFIG_BIDIR_PRED
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#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}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {{BWDREF_FRAME, NONE}},
#endif  // CONFIG_BIDIR_PRED
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#endif  // CONFIG_EXT_REFS
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  {{GOLDEN_FRAME, NONE}},
  {{ALTREF_FRAME, NONE}},
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  {{LAST_FRAME,   ALTREF_FRAME}},
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#if CONFIG_EXT_REFS
  {{LAST2_FRAME,  ALTREF_FRAME}},
  {{LAST3_FRAME,  ALTREF_FRAME}},
  {{LAST4_FRAME,  ALTREF_FRAME}},
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#else  // CONFIG_EXT_REFS
#if CONFIG_BIDIR_PRED
  {{LAST_FRAME,   BWDREF_FRAME}},
  {{GOLDEN_FRAME, BWDREF_FRAME}},
#endif  // CONFIG_BIDIR_PRED
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#endif  // CONFIG_EXT_REFS
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  {{GOLDEN_FRAME, ALTREF_FRAME}},
  {{INTRA_FRAME,  NONE}},
};

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#if CONFIG_DUAL_FILTER
// TODO(jingning): The magic number 9 here really means the combination
// of prediction filter types for vertical and horizontal directions.
// It will be replaced after we integrate the dual filter experiment with
// the ext-interp experiment.
static int filter_sets[9][2] = {
    {0, 0}, {0, 1}, {0, 2},
    {1, 0}, {1, 1}, {1, 2},
    {2, 0}, {2, 1}, {2, 2},
};
#endif

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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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// 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
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#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
};
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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;
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  const int f_index = bsize - BLOCK_16X16;
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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;
  }
}

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int dct_vs_idtx(int16_t *diff, int stride, int w, int h,
                double *hcorr, double *vcorr) {
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  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)
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    prune_bitmask |= 1 << IDTX_1D;
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  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)
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    prune_bitmask |= 1 << (IDTX_1D + 8);
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  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,
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                             MACROBLOCKD *xd, int adst_flipadst,
                             int dct_idtx) {
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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;
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  int prune = 0;
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  vp10_subtract_plane(x, bsize, 0);
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  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;
}
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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,
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                          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

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  switch (cpi->sf.tx_type_search.prune_mode) {
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    case NO_PRUNE:
      return 0;
      break;
    case PRUNE_ONE :
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      if ((tx_set >= 0) & !(tx_set_1D[FLIPADST_1D] & tx_set_1D[ADST_1D]))
        return 0;
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      return prune_one_for_sby(cpi, bsize, x, xd);
      break;
  #if CONFIG_EXT_TX
    case PRUNE_TWO :
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      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);
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      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) |
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         ((prune >> (htx_tab[tx_type] + 8)) & 1));
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#else
  // temporary to avoid compiler warnings
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  (void) vtx_tab;
  (void) htx_tab;
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  (void) tx_type;
  (void) prune;
  return 1;
#endif
}

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static void model_rd_from_sse(const VP10_COMP *const cpi,
                              const MACROBLOCKD *const xd,
                              BLOCK_SIZE bsize,
                              int plane,
                              uint64_t sse,
                              int *rate,
                              int64_t *dist) {
  const struct macroblockd_plane *const pd = &xd->plane[plane];
  const int dequant_shift =
#if CONFIG_VP9_HIGHBITDEPTH
      (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) ?
          xd->bd - 5 :
#endif  // CONFIG_VP9_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 = (square_error * (280 - quantizer)) >> (16 - VP9_PROB_COST_SHIFT);
    else
      *rate = 0;
    *dist = (square_error * quantizer) >> 8;
  } else {
    vp10_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 VP10_COMP *const cpi, BLOCK_SIZE bsize,
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                            MACROBLOCK *x, MACROBLOCKD *xd,
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                            int plane_from, int plane_to,
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                            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 sum_sse = 0;
  int64_t total_sse = 0;
  int skip_flag = 1;
  int rate;
  int64_t dist;

  x->pred_sse[ref] = 0;

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  for (i = plane_from; i <= plane_to; ++i) {
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    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];
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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;

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

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        x->skip_txfm[i][block_idx] = SKIP_TXFM_NONE;
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        if (skip_flag && !low_err_skip)
          skip_flag = 0;

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

    total_sse += sum_sse;

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    model_rd_from_sse(cpi, xd, bs, i, sum_sse, &rate, &dist);

    rate_sum += rate;
    dist_sum += dist;
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  }

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

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)];
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  uint8_t token_cache[MAX_TX_SQUARE];
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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;
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    int tx_type = get_tx_type(pd->plane_type, xd, block, tx_size);
    int shift = (MAX_TX_SCALE - get_tx_scale(xd, tx_type, tx_size)) * 2;
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    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;
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    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH && xd->bd == BITDEPTH_10) {
      shift = 2;
    }
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    *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[MAX_TX_SQUARE]);
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      uint8_t *recon = (uint8_t*)recon16;
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#else
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      DECLARE_ALIGNED(16, uint8_t, recon[MAX_TX_SQUARE]);
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#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;
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        vpx_highbd_convolve_copy(dst, dst_stride, recon, MAX_TX_SIZE,
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                                 NULL, 0, NULL, 0, bs, bs, xd->bd);
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        highbd_inv_txfm_add(dqcoeff, recon, MAX_TX_SIZE, &inv_txfm_param);
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      } else
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#endif  // CONFIG_VP9_HIGHBITDEPTH
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      {
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        vpx_convolve_copy(dst, dst_stride, recon, MAX_TX_SIZE,
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                          NULL, 0, NULL, 0, bs, bs);
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        inv_txfm_add(dqcoeff, recon, MAX_TX_SIZE, &inv_txfm_param);
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      }

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

    *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) {
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    if (x->skip_txfm[plane][block >> (tx_size << 1)] ==
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        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][block >> (tx_size << 1)] ==
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               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][block >> (tx_size << 1)] << 4;
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      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;
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        const struct macroblockd_plane *const pd = &xd->plane[plane];
        TX_TYPE tx_type = get_tx_type(pd->plane_type, xd, block, tx_size);
        int shift = (MAX_TX_SCALE - get_tx_scale(xd, tx_type, tx_size)) * 2;
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#if CONFIG_VP9_HIGHBITDEPTH
        dc_correct >>= ((xd->bd - 8) * 2);
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#endif
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        dc_correct >>= shift;
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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;
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      sse  = x->bsse[plane][block >> (tx_size << 1)] << 4;
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      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 int64_t txfm_yrd(VP10_COMP *cpi, MACROBLOCK *x,
                        int *r, int64_t *d, int *s, int64_t *sse,
                        int64_t ref_best_rd,
                        BLOCK_SIZE bs, TX_TYPE tx_type, int tx_size) {
  VP10_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;
  vpx_prob skip_prob = vp10_get_skip_prob(cm, xd);
  int s0, s1;
  const TX_SIZE max_tx_size = max_txsize_lookup[bs];
  const int tx_select = cm->tx_mode == TX_MODE_SELECT;
  const int is_inter = is_inter_block(mbmi);
  const int r_tx_size =
      cpi->tx_size_cost[max_tx_size - TX_8X8][get_tx_size_context(xd)][tx_size];
#if CONFIG_EXT_TX
  int ext_tx_set;
#endif  // CONFIG_EXT_TX

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

  mbmi->tx_type = tx_type;
  mbmi->tx_size = tx_size;
  txfm_rd_in_plane(x,
                   cpi,
                   r, d, s,
                   sse, ref_best_rd, 0, bs, tx_size,
                   cpi->sf.use_fast_coef_costing);
  if (*r == INT_MAX)
    return INT64_MAX;
#if CONFIG_EXT_TX
  ext_tx_set = get_ext_tx_set(tx_size, bs, is_inter);
  if (get_ext_tx_types(tx_size, bs, is_inter) > 1 &&
      !xd->lossless[xd->mi[0]->mbmi.segment_id]) {
    if (is_inter) {
      if (ext_tx_set > 0)
        *r += cpi->inter_tx_type_costs[ext_tx_set]
                                      [mbmi->tx_size][mbmi->tx_type];
    } else {
      if (ext_tx_set > 0 && ALLOW_INTRA_EXT_TX)
        *r += cpi->intra_tx_type_costs[ext_tx_set][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) {
      *r += cpi->inter_tx_type_costs[mbmi->tx_size][mbmi->tx_type];
    } else {
      *r += cpi->intra_tx_type_costs[mbmi->tx_size]
           [intra_mode_to_tx_type_context[mbmi->mode]]
           [mbmi->tx_type];
    }
  }
#endif  // CONFIG_EXT_TX

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

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  if (tx_select)
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    *r += r_tx_size;

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

  return rd;
}

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static int64_t choose_tx_size_fix_type(VP10_COMP *cpi,
                                       BLOCK_SIZE bs,
                                       MACROBLOCK *x,
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                                       int *rate,
                                       int64_t *distortion,
                                       int *skip,
                                       int64_t *psse,
                                       int64_t ref_best_rd,
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                                       TX_TYPE tx_type,
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                                       int prune) {
  VP10_COMMON *const cm = &cpi->common;
  MACROBLOCKD *const xd = &x->e_mbd;
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  int r, s;
  int64_t d, sse;
  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 = max_tx_size;
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  uint8_t zcoeff_blk[TX_SIZES][MAX_MIB_SIZE * MAX_MIB_SIZE * 4];
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