rdopt.c 140 KB
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/*
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 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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 *
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 *  Use of this source code is governed by a BSD-style license
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 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
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 *  in the file PATENTS.  All contributing project authors may
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 *  be found in the AUTHORS file in the root of the source tree.
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 */


#include <stdio.h>
#include <math.h>
#include <limits.h>
#include <assert.h>
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#include "vp8/common/pragmas.h"
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#include "tokenize.h"
#include "treewriter.h"
#include "onyx_int.h"
#include "modecosts.h"
#include "encodeintra.h"
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#include "vp8/common/entropymode.h"
#include "vp8/common/reconinter.h"
#include "vp8/common/reconintra.h"
#include "vp8/common/reconintra4x4.h"
#include "vp8/common/findnearmv.h"
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#include "vp8/common/quant_common.h"
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#include "encodemb.h"
#include "quantize.h"
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#include "vp8/common/idct.h"
#include "vp8/common/g_common.h"
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#include "variance.h"
#include "mcomp.h"
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#include "rdopt.h"
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#include "ratectrl.h"
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#include "vpx_mem/vpx_mem.h"
#include "dct.h"
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#include "vp8/common/systemdependent.h"
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#include "vp8/common/seg_common.h"
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#include "vp8/common/pred_common.h"
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#if CONFIG_RUNTIME_CPU_DETECT
#define IF_RTCD(x)  (x)
#else
#define IF_RTCD(x)  NULL
#endif

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extern void vp8cx_mb_init_quantizer(VP8_COMP *cpi, MACROBLOCK *x);
extern void vp8_update_zbin_extra(VP8_COMP *cpi, MACROBLOCK *x);

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#if CONFIG_HYBRIDTRANSFORM
extern void vp8_ht_quantize_b(BLOCK *b, BLOCKD *d);
#endif

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#define XMVCOST (x->e_mbd.allow_high_precision_mv?x->mvcost_hp:x->mvcost)

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#define MAXF(a,b)            (((a) > (b)) ? (a) : (b))

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#define INVALID_MV 0x80008000

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#if CONFIG_SWITCHABLE_INTERP
/* Factor to weigh the rate for switchable interp filters */
#define SWITCHABLE_INTERP_RATE_FACTOR 1
#endif

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static const int auto_speed_thresh[17] = {
  1000,
  200,
  150,
  130,
  150,
  125,
  120,
  115,
  115,
  115,
  115,
  115,
  115,
  115,
  115,
  115,
  105
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};

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#if CONFIG_PRED_FILTER
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const MODE_DEFINITION vp8_mode_order[MAX_MODES] = {
  {ZEROMV,    LAST_FRAME,   0,  0},
  {ZEROMV,    LAST_FRAME,   0,  1},
  {DC_PRED,   INTRA_FRAME,  0,  0},

  {NEARESTMV, LAST_FRAME,   0,  0},
  {NEARESTMV, LAST_FRAME,   0,  1},
  {NEARMV,    LAST_FRAME,   0,  0},
  {NEARMV,    LAST_FRAME,   0,  1},

  {ZEROMV,    GOLDEN_FRAME, 0,  0},
  {ZEROMV,    GOLDEN_FRAME, 0,  1},
  {NEARESTMV, GOLDEN_FRAME, 0,  0},
  {NEARESTMV, GOLDEN_FRAME, 0,  1},

  {ZEROMV,    ALTREF_FRAME, 0,  0},
  {ZEROMV,    ALTREF_FRAME, 0,  1},
  {NEARESTMV, ALTREF_FRAME, 0,  0},
  {NEARESTMV, ALTREF_FRAME, 0,  1},

  {NEARMV,    GOLDEN_FRAME, 0,  0},
  {NEARMV,    GOLDEN_FRAME, 0,  1},
  {NEARMV,    ALTREF_FRAME, 0,  0},
  {NEARMV,    ALTREF_FRAME, 0,  1},

  {V_PRED,    INTRA_FRAME,  0,  0},
  {H_PRED,    INTRA_FRAME,  0,  0},
  {D45_PRED,  INTRA_FRAME,  0,  0},
  {D135_PRED, INTRA_FRAME,  0,  0},
  {D117_PRED, INTRA_FRAME,  0,  0},
  {D153_PRED, INTRA_FRAME,  0,  0},
  {D27_PRED,  INTRA_FRAME,  0,  0},
  {D63_PRED,  INTRA_FRAME,  0,  0},

  {TM_PRED,   INTRA_FRAME,  0,  0},

  {NEWMV,     LAST_FRAME,   0,  0},
  {NEWMV,     LAST_FRAME,   0,  1},
  {NEWMV,     GOLDEN_FRAME, 0,  0},
  {NEWMV,     GOLDEN_FRAME, 0,  1},
  {NEWMV,     ALTREF_FRAME, 0,  0},
  {NEWMV,     ALTREF_FRAME, 0,  1},

  {SPLITMV,   LAST_FRAME,   0,  0},
  {SPLITMV,   GOLDEN_FRAME, 0,  0},
  {SPLITMV,   ALTREF_FRAME, 0,  0},

  {B_PRED,    INTRA_FRAME,  0,  0},
  {I8X8_PRED, INTRA_FRAME,  0,  0},

  /* compound prediction modes */
  {ZEROMV,    LAST_FRAME,   GOLDEN_FRAME, 0},
  {NEARESTMV, LAST_FRAME,   GOLDEN_FRAME, 0},
  {NEARMV,    LAST_FRAME,   GOLDEN_FRAME, 0},

  {ZEROMV,    ALTREF_FRAME, LAST_FRAME,   0},
  {NEARESTMV, ALTREF_FRAME, LAST_FRAME,   0},
  {NEARMV,    ALTREF_FRAME, LAST_FRAME,   0},

  {ZEROMV,    GOLDEN_FRAME, ALTREF_FRAME, 0},
  {NEARESTMV, GOLDEN_FRAME, ALTREF_FRAME, 0},
  {NEARMV,    GOLDEN_FRAME, ALTREF_FRAME, 0},

  {NEWMV,     LAST_FRAME,   GOLDEN_FRAME, 0},
  {NEWMV,     ALTREF_FRAME, LAST_FRAME,   0},
  {NEWMV,     GOLDEN_FRAME, ALTREF_FRAME, 0},

  {SPLITMV,   LAST_FRAME,   GOLDEN_FRAME, 0},
  {SPLITMV,   ALTREF_FRAME, LAST_FRAME,   0},
  {SPLITMV,   GOLDEN_FRAME, ALTREF_FRAME, 0}
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};
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#else
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const MODE_DEFINITION vp8_mode_order[MAX_MODES] = {
  {ZEROMV,    LAST_FRAME,   0},
  {DC_PRED,   INTRA_FRAME,  0},
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  {NEARESTMV, LAST_FRAME,   0},
  {NEARMV,    LAST_FRAME,   0},
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  {ZEROMV,    GOLDEN_FRAME, 0},
  {NEARESTMV, GOLDEN_FRAME, 0},
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  {ZEROMV,    ALTREF_FRAME, 0},
  {NEARESTMV, ALTREF_FRAME, 0},
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  {NEARMV,    GOLDEN_FRAME, 0},
  {NEARMV,    ALTREF_FRAME, 0},
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  {V_PRED,    INTRA_FRAME,  0},
  {H_PRED,    INTRA_FRAME,  0},
  {D45_PRED,  INTRA_FRAME,  0},
  {D135_PRED, INTRA_FRAME,  0},
  {D117_PRED, INTRA_FRAME,  0},
  {D153_PRED, INTRA_FRAME,  0},
  {D27_PRED,  INTRA_FRAME,  0},
  {D63_PRED,  INTRA_FRAME,  0},
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  {TM_PRED,   INTRA_FRAME,  0},
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  {NEWMV,     LAST_FRAME,   0},
  {NEWMV,     GOLDEN_FRAME, 0},
  {NEWMV,     ALTREF_FRAME, 0},
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  {SPLITMV,   LAST_FRAME,   0},
  {SPLITMV,   GOLDEN_FRAME, 0},
  {SPLITMV,   ALTREF_FRAME, 0},
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  {B_PRED,    INTRA_FRAME,  0},
  {I8X8_PRED, INTRA_FRAME,  0},
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  /* compound prediction modes */
  {ZEROMV,    LAST_FRAME,   GOLDEN_FRAME},
  {NEARESTMV, LAST_FRAME,   GOLDEN_FRAME},
  {NEARMV,    LAST_FRAME,   GOLDEN_FRAME},
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  {ZEROMV,    ALTREF_FRAME, LAST_FRAME},
  {NEARESTMV, ALTREF_FRAME, LAST_FRAME},
  {NEARMV,    ALTREF_FRAME, LAST_FRAME},
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  {ZEROMV,    GOLDEN_FRAME, ALTREF_FRAME},
  {NEARESTMV, GOLDEN_FRAME, ALTREF_FRAME},
  {NEARMV,    GOLDEN_FRAME, ALTREF_FRAME},
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  {NEWMV,     LAST_FRAME,   GOLDEN_FRAME},
  {NEWMV,     ALTREF_FRAME, LAST_FRAME  },
  {NEWMV,     GOLDEN_FRAME, ALTREF_FRAME},
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  {SPLITMV,   LAST_FRAME,   GOLDEN_FRAME},
  {SPLITMV,   ALTREF_FRAME, LAST_FRAME  },
  {SPLITMV,   GOLDEN_FRAME, ALTREF_FRAME}
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};
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#endif
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static void fill_token_costs(
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  unsigned int (*c)[COEF_BANDS] [PREV_COEF_CONTEXTS] [MAX_ENTROPY_TOKENS],
  const vp8_prob(*p)[COEF_BANDS] [PREV_COEF_CONTEXTS] [ENTROPY_NODES],
  int block_type_counts) {
  int i, j, k;

  for (i = 0; i < block_type_counts; i++)
    for (j = 0; j < COEF_BANDS; j++)
      for (k = 0; k < PREV_COEF_CONTEXTS; k++) {
        if (k == 0 && ((j > 0 && i > 0) || (j > 1 && i == 0)))
          vp8_cost_tokens_skip((int *)(c [i][j][k]),
                               p [i][j][k],
                               vp8_coef_tree);
        else
          vp8_cost_tokens((int *)(c [i][j][k]),
                          p [i][j][k],
                          vp8_coef_tree);
      }
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}

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static int rd_iifactor [ 32 ] =  {    4,   4,   3,   2,   1,   0,   0,   0,
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                                      0,   0,   0,   0,   0,   0,   0,   0,
                                      0,   0,   0,   0,   0,   0,   0,   0,
                                      0,   0,   0,   0,   0,   0,   0,   0,
                                 };

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// 3* dc_qlookup[Q]*dc_qlookup[Q];
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/* values are now correlated to quantizer */
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static int sad_per_bit16lut[QINDEX_RANGE];
static int sad_per_bit4lut[QINDEX_RANGE];

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void vp8_init_me_luts() {
  int i;

  // Initialize the sad lut tables using a formulaic calculation for now
  // This is to make it easier to resolve the impact of experimental changes
  // to the quantizer tables.
  for (i = 0; i < QINDEX_RANGE; i++) {
    sad_per_bit16lut[i] =
      (int)((0.0418 * vp8_convert_qindex_to_q(i)) + 2.4107);
    sad_per_bit4lut[i] = (int)((0.063 * vp8_convert_qindex_to_q(i)) + 2.742);
  }
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}
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int compute_rd_mult(int qindex) {
  int q;
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  q = vp8_dc_quant(qindex, 0);
  return (11 * q * q) >> 6;
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}

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void vp8cx_initialize_me_consts(VP8_COMP *cpi, int QIndex) {
  cpi->mb.sadperbit16 =  sad_per_bit16lut[QIndex];
  cpi->mb.sadperbit4  =  sad_per_bit4lut[QIndex];
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}

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void vp8_initialize_rd_consts(VP8_COMP *cpi, int QIndex) {
  int q;
  int i;
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  vp8_clear_system_state();  // __asm emms;
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  // Further tests required to see if optimum is different
  // for key frames, golden frames and arf frames.
  // if (cpi->common.refresh_golden_frame ||
  //     cpi->common.refresh_alt_ref_frame)
  QIndex = (QIndex < 0) ? 0 : ((QIndex > MAXQ) ? MAXQ : QIndex);
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  cpi->RDMULT = compute_rd_mult(QIndex);
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  // Extend rate multiplier along side quantizer zbin increases
  if (cpi->zbin_over_quant  > 0) {
    double oq_factor;
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    // Experimental code using the same basic equation as used for Q above
    // The units of cpi->zbin_over_quant are 1/128 of Q bin size
    oq_factor = 1.0 + ((double)0.0015625 * cpi->zbin_over_quant);
    cpi->RDMULT = (int)((double)cpi->RDMULT * oq_factor * oq_factor);
  }
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  if (cpi->pass == 2 && (cpi->common.frame_type != KEY_FRAME)) {
    if (cpi->twopass.next_iiratio > 31)
      cpi->RDMULT += (cpi->RDMULT * rd_iifactor[31]) >> 4;
    else
      cpi->RDMULT +=
        (cpi->RDMULT * rd_iifactor[cpi->twopass.next_iiratio]) >> 4;
  }
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  if (cpi->RDMULT < 7)
    cpi->RDMULT = 7;
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  cpi->mb.errorperbit = (cpi->RDMULT / 110);
  cpi->mb.errorperbit += (cpi->mb.errorperbit == 0);
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  vp8_set_speed_features(cpi);
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  q = (int)pow(vp8_dc_quant(QIndex, 0) >> 2, 1.25);
  q = q << 2;
  cpi->RDMULT = cpi->RDMULT << 4;
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  if (q < 8)
    q = 8;
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  if (cpi->RDMULT > 1000) {
    cpi->RDDIV = 1;
    cpi->RDMULT /= 100;
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    for (i = 0; i < MAX_MODES; i++) {
      if (cpi->sf.thresh_mult[i] < INT_MAX) {
        cpi->rd_threshes[i] = cpi->sf.thresh_mult[i] * q / 100;
      } else {
        cpi->rd_threshes[i] = INT_MAX;
      }
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      cpi->rd_baseline_thresh[i] = cpi->rd_threshes[i];
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    }
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  } else {
    cpi->RDDIV = 100;
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    for (i = 0; i < MAX_MODES; i++) {
      if (cpi->sf.thresh_mult[i] < (INT_MAX / q)) {
        cpi->rd_threshes[i] = cpi->sf.thresh_mult[i] * q;
      } else {
        cpi->rd_threshes[i] = INT_MAX;
      }
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      cpi->rd_baseline_thresh[i] = cpi->rd_threshes[i];
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    }
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  }
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  fill_token_costs(
    cpi->mb.token_costs,
    (const vp8_prob( *)[8][PREV_COEF_CONTEXTS][11]) cpi->common.fc.coef_probs,
    BLOCK_TYPES);
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  fill_token_costs(
    cpi->mb.token_costs_8x8,
    (const vp8_prob( *)[8][PREV_COEF_CONTEXTS][11]) cpi->common.fc.coef_probs_8x8,
    BLOCK_TYPES_8X8);
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#if CONFIG_TX16X16
  fill_token_costs(
    cpi->mb.token_costs_16x16,
    (const vp8_prob(*)[8][PREV_COEF_CONTEXTS][11]) cpi->common.fc.coef_probs_16x16,
    BLOCK_TYPES_16X16);
#endif

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  /*rough estimate for costing*/
  cpi->common.kf_ymode_probs_index = cpi->common.base_qindex >> 4;
  vp8_init_mode_costs(cpi);
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}

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void vp8_auto_select_speed(VP8_COMP *cpi) {
  int milliseconds_for_compress = (int)(1000000 / cpi->oxcf.frame_rate);
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  milliseconds_for_compress = milliseconds_for_compress * (16 - cpi->oxcf.cpu_used) / 16;
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#if 0

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  if (0) {
    FILE *f;
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    f = fopen("speed.stt", "a");
    fprintf(f, " %8ld %10ld %10ld %10ld\n",
            cpi->common.current_video_frame, cpi->Speed, milliseconds_for_compress, cpi->avg_pick_mode_time);
    fclose(f);
  }
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#endif

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  /*
  // this is done during parameter valid check
  if( cpi->oxcf.cpu_used > 16)
      cpi->oxcf.cpu_used = 16;
  if( cpi->oxcf.cpu_used < -16)
      cpi->oxcf.cpu_used = -16;
  */
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  if (cpi->avg_pick_mode_time < milliseconds_for_compress && (cpi->avg_encode_time - cpi->avg_pick_mode_time) < milliseconds_for_compress) {
    if (cpi->avg_pick_mode_time == 0) {
      cpi->Speed = 4;
    } else {
      if (milliseconds_for_compress * 100 < cpi->avg_encode_time * 95) {
        cpi->Speed          += 2;
        cpi->avg_pick_mode_time = 0;
        cpi->avg_encode_time = 0;

        if (cpi->Speed > 16) {
          cpi->Speed = 16;
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        }
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      }
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      if (milliseconds_for_compress * 100 > cpi->avg_encode_time * auto_speed_thresh[cpi->Speed]) {
        cpi->Speed          -= 1;
        cpi->avg_pick_mode_time = 0;
        cpi->avg_encode_time = 0;
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        // In real-time mode, cpi->speed is in [4, 16].
        if (cpi->Speed < 4) {      // if ( cpi->Speed < 0 )
          cpi->Speed = 4;        // cpi->Speed = 0;
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        }
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      }
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    }
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  } else {
    cpi->Speed += 4;
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    if (cpi->Speed > 16)
      cpi->Speed = 16;
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    cpi->avg_pick_mode_time = 0;
    cpi->avg_encode_time = 0;
  }
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}

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int vp8_block_error_c(short *coeff, short *dqcoeff) {
  int i;
  int error = 0;
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  for (i = 0; i < 16; i++) {
    int this_diff = coeff[i] - dqcoeff[i];
    error += this_diff * this_diff;
  }
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  return error;
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}

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#if CONFIG_HYBRIDTRANSFORM8X8
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int vp8_submb_error_c(short *coeff, short *dqcoeff) {
  int i;
  int error = 0;

  for (i = 0; i < 64; i++) {
    int this_diff = coeff[i] - dqcoeff[i];
    error += this_diff * this_diff;
  }

  return error;
}
#endif

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int vp8_mbblock_error_c(MACROBLOCK *mb, int dc) {
  BLOCK  *be;
  BLOCKD *bd;
  int i, j;
  int berror, error = 0;
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  for (i = 0; i < 16; i++) {
    be = &mb->block[i];
    bd = &mb->e_mbd.block[i];
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    berror = 0;
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    for (j = dc; j < 16; j++) {
      int this_diff = be->coeff[j] - bd->dqcoeff[j];
      berror += this_diff * this_diff;
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    }

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    error += berror;
  }

  return error;
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}

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int vp8_mbuverror_c(MACROBLOCK *mb) {
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  BLOCK  *be;
  BLOCKD *bd;
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  int i;
  int error = 0;
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  for (i = 16; i < 24; i++) {
    be = &mb->block[i];
    bd = &mb->e_mbd.block[i];
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    error += vp8_block_error_c(be->coeff, bd->dqcoeff);
  }
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  return error;
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}

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int VP8_UVSSE(MACROBLOCK *x, const vp8_variance_rtcd_vtable_t *rtcd) {
  unsigned char *uptr, *vptr;
  unsigned char *upred_ptr = (*(x->block[16].base_src) + x->block[16].src);
  unsigned char *vpred_ptr = (*(x->block[20].base_src) + x->block[20].src);
  int uv_stride = x->block[16].src_stride;

  unsigned int sse1 = 0;
  unsigned int sse2 = 0;
  int mv_row = x->e_mbd.mode_info_context->mbmi.mv.as_mv.row;
  int mv_col = x->e_mbd.mode_info_context->mbmi.mv.as_mv.col;
  int offset;
  int pre_stride = x->e_mbd.block[16].pre_stride;

  if (mv_row < 0)
    mv_row -= 1;
  else
    mv_row += 1;

  if (mv_col < 0)
    mv_col -= 1;
  else
    mv_col += 1;

  mv_row /= 2;
  mv_col /= 2;

  offset = (mv_row >> 3) * pre_stride + (mv_col >> 3);
  uptr = x->e_mbd.pre.u_buffer + offset;
  vptr = x->e_mbd.pre.v_buffer + offset;

  if ((mv_row | mv_col) & 7) {
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#if CONFIG_SIXTEENTH_SUBPEL_UV
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    VARIANCE_INVOKE(rtcd, subpixvar8x8)(uptr, pre_stride,
                                        (mv_col & 7) << 1, (mv_row & 7) << 1, upred_ptr, uv_stride, &sse2);
    VARIANCE_INVOKE(rtcd, subpixvar8x8)(vptr, pre_stride,
                                        (mv_col & 7) << 1, (mv_row & 7) << 1, vpred_ptr, uv_stride, &sse1);
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#else
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    VARIANCE_INVOKE(rtcd, subpixvar8x8)(uptr, pre_stride,
                                        mv_col & 7, mv_row & 7, upred_ptr, uv_stride, &sse2);
    VARIANCE_INVOKE(rtcd, subpixvar8x8)(vptr, pre_stride,
                                        mv_col & 7, mv_row & 7, vpred_ptr, uv_stride, &sse1);
#endif
    sse2 += sse1;
  } else {
    VARIANCE_INVOKE(rtcd, var8x8)(uptr, pre_stride,
                                  upred_ptr, uv_stride, &sse2);
    VARIANCE_INVOKE(rtcd, var8x8)(vptr, pre_stride,
                                  vpred_ptr, uv_stride, &sse1);
    sse2 += sse1;
  }
  return sse2;
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}

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static int cost_coeffs(MACROBLOCK *mb, BLOCKD *b, int type, ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l) {
  int c = !type;              /* start at coef 0, unless Y with Y2 */
  int eob = b->eob;
  int pt;    /* surrounding block/prev coef predictor */
  int cost = 0;
  short *qcoeff_ptr = b->qcoeff;
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#if CONFIG_HYBRIDTRANSFORM
  int QIndex = mb->q_index;
  int active_ht = (QIndex < ACTIVE_HT) &&
                (mb->e_mbd.mode_info_context->mbmi.mode_rdopt == B_PRED);

  int const *pt_scan;

  if((type == PLANE_TYPE_Y_WITH_DC) && active_ht) {
    switch (b->bmi.as_mode.tx_type) {
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      case ADST_DCT:
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        pt_scan = vp8_row_scan;
        break;

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      case DCT_ADST:
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        pt_scan = vp8_col_scan;
        break;

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      default:
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        pt_scan = vp8_default_zig_zag1d;
        break;
    }

  } else {
    pt_scan = vp8_default_zig_zag1d;
  }
#define  QC(I)  ( qcoeff_ptr [pt_scan[I]] )
#else
#define QC(I)  ( qcoeff_ptr [vp8_default_zig_zag1d[I]] )
#endif
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  VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
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  for (; c < eob; c++) {
    int v = QC(c);
    int t = vp8_dct_value_tokens_ptr[v].Token;
    cost += mb->token_costs [type] [vp8_coef_bands[c]] [pt] [t];
    cost += vp8_dct_value_cost_ptr[v];
    pt = vp8_prev_token_class[t];
  }
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# undef QC

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  if (c < 16)
    cost += mb->token_costs [type] [vp8_coef_bands[c]] [pt] [DCT_EOB_TOKEN];
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  pt = (c != !type); // is eob first coefficient;
  *a = *l = pt;
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  return cost;
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}

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static int vp8_rdcost_mby(MACROBLOCK *mb) {
  int cost = 0;
  int b;
  MACROBLOCKD *x = &mb->e_mbd;
  ENTROPY_CONTEXT_PLANES t_above, t_left;
  ENTROPY_CONTEXT *ta;
  ENTROPY_CONTEXT *tl;
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  vpx_memcpy(&t_above, mb->e_mbd.above_context, sizeof(ENTROPY_CONTEXT_PLANES));
  vpx_memcpy(&t_left, mb->e_mbd.left_context, sizeof(ENTROPY_CONTEXT_PLANES));
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  ta = (ENTROPY_CONTEXT *)&t_above;
  tl = (ENTROPY_CONTEXT *)&t_left;
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  for (b = 0; b < 16; b++)
    cost += cost_coeffs(mb, x->block + b, PLANE_TYPE_Y_NO_DC,
                        ta + vp8_block2above[b], tl + vp8_block2left[b]);
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  cost += cost_coeffs(mb, x->block + 24, PLANE_TYPE_Y2,
                      ta + vp8_block2above[24], tl + vp8_block2left[24]);
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  return cost;
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}

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static void macro_block_yrd(MACROBLOCK *mb,
                            int *Rate,
                            int *Distortion,
                            const VP8_ENCODER_RTCD *rtcd) {
  int b;
  MACROBLOCKD *const x = &mb->e_mbd;
  BLOCK   *const mb_y2 = mb->block + 24;
  BLOCKD *const x_y2  = x->block + 24;
  short *Y2DCPtr = mb_y2->src_diff;
  BLOCK *beptr;
  int d;
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  ENCODEMB_INVOKE(&rtcd->encodemb, submby)(
    mb->src_diff,
    *(mb->block[0].base_src),
    mb->e_mbd.predictor,
    mb->block[0].src_stride);
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  // Fdct and building the 2nd order block
  for (beptr = mb->block; beptr < mb->block + 16; beptr += 2) {
    mb->vp8_short_fdct8x4(beptr->src_diff, beptr->coeff, 32);
    *Y2DCPtr++ = beptr->coeff[0];
    *Y2DCPtr++ = beptr->coeff[16];
  }

  // 2nd order fdct
  mb->short_walsh4x4(mb_y2->src_diff, mb_y2->coeff, 8);

  // Quantization
  for (b = 0; b < 16; b++) {
    mb->quantize_b(&mb->block[b], &mb->e_mbd.block[b]);
  }
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  // DC predication and Quantization of 2nd Order block
  mb->quantize_b(mb_y2, x_y2);
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  // Distortion
  d = ENCODEMB_INVOKE(&rtcd->encodemb, mberr)(mb, 1);
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  d += ENCODEMB_INVOKE(&rtcd->encodemb, berr)(mb_y2->coeff, x_y2->dqcoeff);
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  *Distortion = (d >> 2);
  // rate
  *Rate = vp8_rdcost_mby(mb);
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}
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static int cost_coeffs_2x2(MACROBLOCK *mb,
                           BLOCKD *b, int type,
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                           ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l) {
  int c = !type;              /* start at coef 0, unless Y with Y2 */
  int eob = b->eob;
  int pt;    /* surrounding block/prev coef predictor */
  int cost = 0;
  short *qcoeff_ptr = b->qcoeff;
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  VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
  assert(eob <= 4);
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#define QC2X2(I)  ( qcoeff_ptr [vp8_default_zig_zag1d[I]] )
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  for (; c < eob; c++) {
    int v = QC2X2(c);
    int t = vp8_dct_value_tokens_ptr[v].Token;
    cost += mb->token_costs_8x8[type] [vp8_coef_bands[c]] [pt] [t];
    cost += vp8_dct_value_cost_ptr[v];
    pt = vp8_prev_token_class[t];
  }
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#undef QC2X2
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  if (c < 4)
    cost += mb->token_costs_8x8 [type][vp8_coef_bands[c]]
            [pt] [DCT_EOB_TOKEN];
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  pt = (c != !type); // is eob first coefficient;
  *a = *l = pt;
  return cost;
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}


static int cost_coeffs_8x8(MACROBLOCK *mb,
                           BLOCKD *b, int type,
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                           ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l) {
  int c = !type;              /* start at coef 0, unless Y with Y2 */
  int eob = b->eob;
  int pt;    /* surrounding block/prev coef predictor */
  int cost = 0;
  short *qcoeff_ptr = b->qcoeff;
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  VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
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#define QC8X8(I)  ( qcoeff_ptr [vp8_default_zig_zag1d_8x8[I]] )
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  for (; c < eob; c++) {
    int v = QC8X8(c);
    int t = vp8_dct_value_tokens_ptr[v].Token;
    cost += mb->token_costs_8x8[type] [vp8_coef_bands_8x8[c]] [pt] [t];
    cost += vp8_dct_value_cost_ptr[v];
    pt = vp8_prev_token_class[t];
  }
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#undef QC8X8
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  if (c < 64)
    cost += mb->token_costs_8x8 [type][vp8_coef_bands_8x8[c]]
            [pt] [DCT_EOB_TOKEN];
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  pt = (c != !type); // is eob first coefficient;
  *a = *l = pt;
  return cost;
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}
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static int vp8_rdcost_mby_8x8(MACROBLOCK *mb) {
  int cost = 0;
  int b;
  MACROBLOCKD *x = &mb->e_mbd;
  ENTROPY_CONTEXT_PLANES t_above, t_left;
  ENTROPY_CONTEXT *ta;
  ENTROPY_CONTEXT *tl;

  vpx_memcpy(&t_above, mb->e_mbd.above_context, sizeof(ENTROPY_CONTEXT_PLANES));
  vpx_memcpy(&t_left, mb->e_mbd.left_context, sizeof(ENTROPY_CONTEXT_PLANES));

  ta = (ENTROPY_CONTEXT *)&t_above;
  tl = (ENTROPY_CONTEXT *)&t_left;

  for (b = 0; b < 16; b += 4)
    cost += cost_coeffs_8x8(mb, x->block + b, PLANE_TYPE_Y_NO_DC,
                            ta + vp8_block2above_8x8[b], tl + vp8_block2left_8x8[b]);

  cost += cost_coeffs_2x2(mb, x->block + 24, PLANE_TYPE_Y2,
                          ta + vp8_block2above[24], tl + vp8_block2left[24]);
  return cost;
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}

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static void macro_block_yrd_8x8(MACROBLOCK *mb,
                                int *Rate,
                                int *Distortion,
                                const VP8_ENCODER_RTCD *rtcd) {
  MACROBLOCKD *const x = &mb->e_mbd;
  BLOCK   *const mb_y2 = mb->block + 24;
  BLOCKD *const x_y2  = x->block + 24;
  int d;

  ENCODEMB_INVOKE(&rtcd->encodemb, submby)(
    mb->src_diff,
    *(mb->block[0].base_src),
    mb->e_mbd.predictor,
    mb->block[0].src_stride);

  vp8_transform_mby_8x8(mb);
  vp8_quantize_mby_8x8(mb);

  /* remove 1st order dc to properly combine 1st/2nd order distortion */
  mb->coeff[0] = 0;
  mb->coeff[64] = 0;
  mb->coeff[128] = 0;
  mb->coeff[192] = 0;
  mb->e_mbd.dqcoeff[0] = 0;
  mb->e_mbd.dqcoeff[64] = 0;
  mb->e_mbd.dqcoeff[128] = 0;
  mb->e_mbd.dqcoeff[192] = 0;

  d = ENCODEMB_INVOKE(&rtcd->encodemb, mberr)(mb, 0);
  d += ENCODEMB_INVOKE(&rtcd->encodemb, berr)(mb_y2->coeff, x_y2->dqcoeff);

  *Distortion = (d >> 2);
  // rate
  *Rate = vp8_rdcost_mby_8x8(mb);
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}
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#if CONFIG_TX16X16
static int cost_coeffs_16x16(MACROBLOCK *mb, BLOCKD *b, int type,
                             ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l) {
  const int eob = b->eob;
  int c = !type;              /* start at coef 0, unless Y with Y2 */
  int cost = 0, pt;    /* surrounding block/prev coef predictor */
  short *qcoeff_ptr = b->qcoeff;

  VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);

# define QC16X16(I)  ( qcoeff_ptr [vp8_default_zig_zag1d_16x16[I]] )
  for (; c < eob; c++) {
    int v = QC16X16(c);
    int t = vp8_dct_value_tokens_ptr[v].Token;
    cost += mb->token_costs_16x16[type][vp8_coef_bands_16x16[c]][pt][t];
    cost += vp8_dct_value_cost_ptr[v];
    pt = vp8_prev_token_class[t];
  }
# undef QC16X16
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  if (c < 256)
    cost += mb->token_costs_16x16[type][vp8_coef_bands_16x16[c]]
            [pt][DCT_EOB_TOKEN];

  pt = (c != !type); // is eob first coefficient;
  *a = *l = pt;
  return cost;
}

static int vp8_rdcost_mby_16x16(MACROBLOCK *mb) {
  int cost;
  MACROBLOCKD *x = &mb->e_mbd;
  ENTROPY_CONTEXT_PLANES t_above, t_left;
  ENTROPY_CONTEXT *ta, *tl;

  vpx_memcpy(&t_above, mb->e_mbd.above_context, sizeof(ENTROPY_CONTEXT_PLANES));
  vpx_memcpy(&t_left, mb->e_mbd.left_context, sizeof(ENTROPY_CONTEXT_PLANES));

  ta = (ENTROPY_CONTEXT *)&t_above;
  tl = (ENTROPY_CONTEXT *)&t_left;

  cost = cost_coeffs_16x16(mb, x->block, PLANE_TYPE_Y_WITH_DC, ta, tl);
  return cost;
}

static void macro_block_yrd_16x16(MACROBLOCK *mb, int *Rate, int *Distortion,
                                  const VP8_ENCODER_RTCD *rtcd) {
  int d;

  ENCODEMB_INVOKE(&rtcd->encodemb, submby)(
    mb->src_diff,
    *(mb->block[0].base_src),
    mb->e_mbd.predictor,
    mb->block[0].src_stride);

  vp8_transform_mby_16x16(mb);
  vp8_quantize_mby_16x16(mb);
  d = ENCODEMB_INVOKE(&rtcd->encodemb, mberr)(mb, 0);

  *Distortion = (d >> 2);
  // rate
  *Rate = vp8_rdcost_mby_16x16(mb);
}
#endif

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static void copy_predictor(unsigned char *dst, const unsigned char *predictor) {
  const unsigned int *p = (const unsigned int *)predictor;
  unsigned int *d = (unsigned int *)dst;
  d[0] = p[0];
  d[4] = p[4];
  d[8] = p[8];
  d[12] = p[12];
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}
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static void copy_predictor_8x8(unsigned char *dst, const unsigned char *predictor) {
  const unsigned int *p = (const unsigned int *)predictor;
  unsigned int *d = (unsigned int *)dst;
  d[0] = p[0];
  d[1] = p[1];
  d[4] = p[4];
  d[5] = p[5];
  d[8] = p[8];
  d[9] = p[9];
  d[12] = p[12];
  d[13] = p[13];
  d[16] = p[16];
  d[17] = p[17];
  d[20] = p[20];
  d[21] = p[21];
  d[24] = p[24];
  d[25] = p[25];
  d[28] = p[28];
  d[29] = p[29];
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}

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static int64_t rd_pick_intra4x4block(
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  VP8_COMP *cpi,
  MACROBLOCK *x,
  BLOCK *be,
  BLOCKD *b,
  B_PREDICTION_MODE *best_mode,
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#if CONFIG_COMP_INTRA_PRED
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  B_PREDICTION_MODE *best_second_mode,
  int allow_comp,
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#endif
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  int *bmode_costs,
  ENTROPY_CONTEXT *a,
  ENTROPY_CONTEXT *l,
  int *bestrate,
  int *bestratey,
  int *bestdistortion) {
  B_PREDICTION_MODE mode;
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#if CONFIG_HYBRIDTRANSFORM
  int QIndex = x->q_index;
  int active_ht = (QIndex < ACTIVE_HT);
  TX_TYPE best_tx_type;
#endif

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#if CONFIG_COMP_INTRA_PRED
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  B_PREDICTION_MODE mode2;
#endif
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  int64_t best_rd = INT64_MAX;
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  int rate = 0;
  int distortion;

  ENTROPY_CONTEXT ta = *a, tempa = *a;
  ENTROPY_CONTEXT tl = *l, templ = *l;
  /*
   * The predictor buffer is a 2d buffer with a stride of 16.  Create
   * a temp buffer that meets the stride requirements, but we are only
   * interested in the left 4x4 block
   * */
  DECLARE_ALIGNED_ARRAY(16, unsigned char,  best_predictor, 16 * 4);
  DECLARE_ALIGNED_ARRAY(16, short, best_dqcoeff, 16);

  for (mode = B_DC_PRED; mode <= B_HU_PRED; mode++) {
#if CONFIG_COMP_INTRA_PRED
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    for (mode2 = (allow_comp ? 0 : (B_DC_PRED - 1));
                   mode2 != (allow_comp ? (mode + 1) : 0); mode2++) {
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#endif
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      int64_t this_rd;
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      int ratey;
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      // TODO Temporarily ignore modes that need the above-right data. SB
      // encoding means this data is not available for the bottom right MB
      // Do we need to do this for mode2 also?
      if (mode == B_LD_PRED || mode == B_VL_PRED)
        continue;
      rate = bmode_costs[mode];
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#if CONFIG_COMP_INTRA_PRED
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      if (mode2 == (B_PREDICTION_MODE)(B_DC_PRED - 1)) {
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#endif
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        RECON_INVOKE(&cpi->rtcd.common->recon, intra4x4_predict)
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        (b, mode, b->predictor);
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#if CONFIG_COMP_INTRA_PRED
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      } else {
        RECON_INVOKE(&cpi->rtcd.common->recon, comp_intra4x4_predict)
        (b, mode, mode2, b->predictor);
        rate += bmode_costs[mode2];
      }
#endif
      ENCODEMB_INVOKE(IF_RTCD(&cpi->rtcd.encodemb), subb)(be, b, 16);

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#if CONFIG_HYBRIDTRANSFORM
      if(active_ht) {
        b->bmi.as_mode.test = mode;
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        txfm_map(b, mode);
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        vp8_fht4x4_c(be->src_diff, be->coeff, 32, b->bmi.as_mode.tx_type);
        vp8_ht_quantize_b(be, b);
      } else {
        x->vp8_short_fdct4x4(be->src_diff, be->coeff, 32);
        x->quantize_b(be, b);
      }
#else
        x->vp8_short_fdct4x4(be->src_diff, be->coeff, 32);
        x->quantize_b(be, b);
#endif
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        tempa = ta;
        templ = tl;
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        ratey = cost_coeffs(x, b, PLANE_TYPE_Y_WITH_DC, &tempa, &templ);
        rate += ratey;
        distortion = ENCODEMB_INVOKE(IF_RTCD(&cpi->rtcd.encodemb), berr)(
            be->coeff, b->dqcoeff) >> 2;

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