rdopt.c 406 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_dsp/blend.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_DUAL_FILTER
#if CONFIG_EXT_INTERP
static const int filter_sets[25][2] = {
    {0, 0}, {0, 1}, {0, 2}, {0, 3}, {0, 4},
    {1, 0}, {1, 1}, {1, 2}, {1, 3}, {1, 4},
    {2, 0}, {2, 1}, {2, 2}, {2, 3}, {2, 4},
    {3, 0}, {3, 1}, {3, 2}, {3, 3}, {3, 4},
    {4, 0}, {4, 1}, {4, 2}, {4, 3}, {4, 4},
};
#else
static const int filter_sets[9][2] = {
    {0, 0}, {0, 1}, {0, 2},
    {1, 0}, {1, 1}, {1, 2},
    {2, 0}, {2, 1}, {2, 2},
};
#endif
#endif

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#if CONFIG_EXT_REFS

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

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#endif  // CONFIG_EXT_REFS

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#if CONFIG_EXT_REFS
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#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
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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}},
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  {NEARESTMV, {BWDREF_FRAME, NONE}},
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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}},
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  {NEWMV,     {BWDREF_FRAME, NONE}},
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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}},
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  {NEARMV,    {BWDREF_FRAME, NONE}},
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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}},
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  {NEWFROMNEARMV,    {BWDREF_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}},
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  {ZEROMV,    {BWDREF_FRAME, NONE}},
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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}},
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#endif  // CONFIG_EXT_REFS
  {NEAREST_NEARESTMV, {GOLDEN_FRAME, ALTREF_FRAME}},
#if CONFIG_EXT_REFS
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  {NEAREST_NEARESTMV, {LAST_FRAME,   BWDREF_FRAME}},
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  {NEAREST_NEARESTMV, {LAST2_FRAME,  BWDREF_FRAME}},
  {NEAREST_NEARESTMV, {LAST3_FRAME,  BWDREF_FRAME}},
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  {NEAREST_NEARESTMV, {GOLDEN_FRAME, BWDREF_FRAME}},
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#endif  // CONFIG_EXT_REFS
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#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}},
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#endif  // CONFIG_EXT_REFS
  {NEARESTMV, {GOLDEN_FRAME, ALTREF_FRAME}},
#if CONFIG_EXT_REFS
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  {NEARESTMV, {LAST_FRAME,   BWDREF_FRAME}},
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  {NEARESTMV, {LAST2_FRAME,  BWDREF_FRAME}},
  {NEARESTMV, {LAST3_FRAME,  BWDREF_FRAME}},
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  {NEARESTMV, {GOLDEN_FRAME, BWDREF_FRAME}},
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#endif  // CONFIG_EXT_REFS
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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}},
  {NEAREST_NEARMV, {LAST_FRAME,   ALTREF_FRAME}},
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  {NEAR_NEARMV,    {LAST_FRAME,   ALTREF_FRAME}},
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  {NEW_NEARESTMV,  {LAST_FRAME,   ALTREF_FRAME}},
  {NEAREST_NEWMV,  {LAST_FRAME,   ALTREF_FRAME}},
  {NEW_NEARMV,     {LAST_FRAME,   ALTREF_FRAME}},
  {NEAR_NEWMV,     {LAST_FRAME,   ALTREF_FRAME}},
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  {NEW_NEWMV,      {LAST_FRAME,   ALTREF_FRAME}},
  {ZERO_ZEROMV,    {LAST_FRAME,   ALTREF_FRAME}},
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#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}},
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#endif  // CONFIG_EXT_REFS
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  {NEAR_NEARESTMV, {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEAREST_NEARMV, {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEAR_NEARMV,    {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEW_NEARESTMV,  {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEAREST_NEWMV,  {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEW_NEARMV,     {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEAR_NEWMV,     {GOLDEN_FRAME, ALTREF_FRAME}},
  {NEW_NEWMV,      {GOLDEN_FRAME, ALTREF_FRAME}},
  {ZERO_ZEROMV,    {GOLDEN_FRAME, ALTREF_FRAME}},

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

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

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

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

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

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

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

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  {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}},
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  {{BWDREF_FRAME, NONE}},
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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}},
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#endif  // CONFIG_EXT_REFS
  {{GOLDEN_FRAME, ALTREF_FRAME}},

#if CONFIG_EXT_REFS
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  {{LAST3_FRAME,  BWDREF_FRAME}},
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  {{GOLDEN_FRAME, BWDREF_FRAME}},
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#endif  // CONFIG_EXT_REFS
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  {{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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// 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];
}

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static 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) {
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  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.
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  int plane;
  const int ref = xd->mi[0]->mbmi.ref_frame[0];

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

  x->pred_sse[ref] = 0;

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

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    unsigned int sse;
    int rate;
    int64_t dist;
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    // TODO(geza): Write direct sse functions that do not compute
    // variance as well.
    cpi->fn_ptr[bs].vf(p->src.buf, p->src.stride,
                       pd->dst.buf, pd->dst.stride, &sse);
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    if (plane == 0)
      x->pred_sse[ref] = sse;
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    total_sse += sse;
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    model_rd_from_sse(cpi, xd, bs, plane, sse, &rate, &dist);
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    rate_sum += rate;
    dist_sum += dist;
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  }

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  *skip_txfm_sb = total_sse == 0;
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  *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;