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

#include "vpx_dsp/quantize.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/mem.h"

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#include "vp10/common/idct.h"
#include "vp10/common/reconinter.h"
#include "vp10/common/reconintra.h"
#include "vp10/common/scan.h"
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#include "vp10/encoder/encodemb.h"
#include "vp10/encoder/rd.h"
#include "vp10/encoder/tokenize.h"
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typedef enum TXFM_OPT {
  TXFM_OPT_NORMAL,
  TXFM_OPT_DC
} TXFM_OPT;

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struct optimize_ctx {
  ENTROPY_CONTEXT ta[MAX_MB_PLANE][16];
  ENTROPY_CONTEXT tl[MAX_MB_PLANE][16];
};

void vp10_subtract_plane(MACROBLOCK *x, BLOCK_SIZE bsize, int plane) {
  struct macroblock_plane *const p = &x->plane[plane];
  const struct macroblockd_plane *const pd = &x->e_mbd.plane[plane];
  const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
  const int bw = 4 * num_4x4_blocks_wide_lookup[plane_bsize];
  const int bh = 4 * num_4x4_blocks_high_lookup[plane_bsize];

#if CONFIG_VP9_HIGHBITDEPTH
  if (x->e_mbd.cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    vpx_highbd_subtract_block(bh, bw, p->src_diff, bw, p->src.buf,
                              p->src.stride, pd->dst.buf, pd->dst.stride,
                              x->e_mbd.bd);
    return;
  }
#endif  // CONFIG_VP9_HIGHBITDEPTH
  vpx_subtract_block(bh, bw, p->src_diff, bw, p->src.buf, p->src.stride,
                     pd->dst.buf, pd->dst.stride);
}

#define RDTRUNC(RM, DM, R, D) ((128 + (R) * (RM)) & 0xFF)

typedef struct vp10_token_state {
  int           rate;
  int           error;
  int           next;
  int16_t       token;
  short         qc;
} vp10_token_state;

// TODO(jimbankoski): experiment to find optimal RD numbers.
static const int plane_rd_mult[PLANE_TYPES] = { 4, 2 };

#define UPDATE_RD_COST()\
{\
  rd_cost0 = RDCOST(rdmult, rddiv, rate0, error0);\
  rd_cost1 = RDCOST(rdmult, rddiv, rate1, error1);\
  if (rd_cost0 == rd_cost1) {\
    rd_cost0 = RDTRUNC(rdmult, rddiv, rate0, error0);\
    rd_cost1 = RDTRUNC(rdmult, rddiv, rate1, error1);\
  }\
}

// This function is a place holder for now but may ultimately need
// to scan previous tokens to work out the correct context.
static int trellis_get_coeff_context(const int16_t *scan,
                                     const int16_t *nb,
                                     int idx, int token,
                                     uint8_t *token_cache) {
  int bak = token_cache[scan[idx]], pt;
  token_cache[scan[idx]] = vp10_pt_energy_class[token];
  pt = get_coef_context(nb, token_cache, idx + 1);
  token_cache[scan[idx]] = bak;
  return pt;
}

static int optimize_b(MACROBLOCK *mb, int plane, int block,
                      TX_SIZE tx_size, int ctx) {
  MACROBLOCKD *const xd = &mb->e_mbd;
  struct macroblock_plane *const p = &mb->plane[plane];
  struct macroblockd_plane *const pd = &xd->plane[plane];
  const int ref = is_inter_block(&xd->mi[0]->mbmi);
  vp10_token_state tokens[1025][2];
  unsigned best_index[1025][2];
  uint8_t token_cache[1024];
  const tran_low_t *const coeff = BLOCK_OFFSET(mb->plane[plane].coeff, block);
  tran_low_t *const qcoeff = BLOCK_OFFSET(p->qcoeff, block);
  tran_low_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
  const int eob = p->eobs[block];
  const PLANE_TYPE type = pd->plane_type;
  const int default_eob = 16 << (tx_size << 1);
  const int mul = 1 + (tx_size == TX_32X32);
  const int16_t *dequant_ptr = pd->dequant;
  const uint8_t *const band_translate = get_band_translate(tx_size);
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  TX_TYPE tx_type = get_tx_type(type, xd, block, tx_size);
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  const scan_order *const so =
      get_scan(tx_size, tx_type, is_inter_block(&xd->mi[0]->mbmi));
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  const int16_t *const scan = so->scan;
  const int16_t *const nb = so->neighbors;
  int next = eob, sz = 0;
  int64_t rdmult = mb->rdmult * plane_rd_mult[type], rddiv = mb->rddiv;
  int64_t rd_cost0, rd_cost1;
  int rate0, rate1, error0, error1;
  int16_t t0, t1;
  EXTRABIT e0;
  int best, band, pt, i, final_eob;
#if CONFIG_VP9_HIGHBITDEPTH
  const int16_t *cat6_high_cost = vp10_get_high_cost_table(xd->bd);
#else
  const int16_t *cat6_high_cost = vp10_get_high_cost_table(8);
#endif

  assert((!type && !plane) || (type && plane));
  assert(eob <= default_eob);

  /* Now set up a Viterbi trellis to evaluate alternative roundings. */
  if (!ref)
    rdmult = (rdmult * 9) >> 4;

  /* Initialize the sentinel node of the trellis. */
  tokens[eob][0].rate = 0;
  tokens[eob][0].error = 0;
  tokens[eob][0].next = default_eob;
  tokens[eob][0].token = EOB_TOKEN;
  tokens[eob][0].qc = 0;
  tokens[eob][1] = tokens[eob][0];

  for (i = 0; i < eob; i++)
    token_cache[scan[i]] =
        vp10_pt_energy_class[vp10_get_token(qcoeff[scan[i]])];

  for (i = eob; i-- > 0;) {
    int base_bits, d2, dx;
    const int rc = scan[i];
    int x = qcoeff[rc];
    /* Only add a trellis state for non-zero coefficients. */
    if (x) {
      int shortcut = 0;
      error0 = tokens[next][0].error;
      error1 = tokens[next][1].error;
      /* Evaluate the first possibility for this state. */
      rate0 = tokens[next][0].rate;
      rate1 = tokens[next][1].rate;
      vp10_get_token_extra(x, &t0, &e0);
      /* Consider both possible successor states. */
      if (next < default_eob) {
        band = band_translate[i + 1];
        pt = trellis_get_coeff_context(scan, nb, i, t0, token_cache);
        rate0 += mb->token_costs[tx_size][type][ref][band][0][pt]
                                [tokens[next][0].token];
        rate1 += mb->token_costs[tx_size][type][ref][band][0][pt]
                                [tokens[next][1].token];
      }
      UPDATE_RD_COST();
      /* And pick the best. */
      best = rd_cost1 < rd_cost0;
      base_bits = vp10_get_cost(t0, e0, cat6_high_cost);
      dx = mul * (dqcoeff[rc] - coeff[rc]);
#if CONFIG_VP9_HIGHBITDEPTH
      if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
        dx >>= xd->bd - 8;
      }
#endif  // CONFIG_VP9_HIGHBITDEPTH
      d2 = dx * dx;
      tokens[i][0].rate = base_bits + (best ? rate1 : rate0);
      tokens[i][0].error = d2 + (best ? error1 : error0);
      tokens[i][0].next = next;
      tokens[i][0].token = t0;
      tokens[i][0].qc = x;
      best_index[i][0] = best;

      /* Evaluate the second possibility for this state. */
      rate0 = tokens[next][0].rate;
      rate1 = tokens[next][1].rate;

      if ((abs(x) * dequant_ptr[rc != 0] > abs(coeff[rc]) * mul) &&
          (abs(x) * dequant_ptr[rc != 0] < abs(coeff[rc]) * mul +
                                               dequant_ptr[rc != 0]))
        shortcut = 1;
      else
        shortcut = 0;

      if (shortcut) {
        sz = -(x < 0);
        x -= 2 * sz + 1;
      }

      /* Consider both possible successor states. */
      if (!x) {
        /* If we reduced this coefficient to zero, check to see if
         *  we need to move the EOB back here.
         */
        t0 = tokens[next][0].token == EOB_TOKEN ? EOB_TOKEN : ZERO_TOKEN;
        t1 = tokens[next][1].token == EOB_TOKEN ? EOB_TOKEN : ZERO_TOKEN;
        e0 = 0;
      } else {
        vp10_get_token_extra(x, &t0, &e0);
        t1 = t0;
      }
      if (next < default_eob) {
        band = band_translate[i + 1];
        if (t0 != EOB_TOKEN) {
          pt = trellis_get_coeff_context(scan, nb, i, t0, token_cache);
          rate0 += mb->token_costs[tx_size][type][ref][band][!x][pt]
                                  [tokens[next][0].token];
        }
        if (t1 != EOB_TOKEN) {
          pt = trellis_get_coeff_context(scan, nb, i, t1, token_cache);
          rate1 += mb->token_costs[tx_size][type][ref][band][!x][pt]
                                  [tokens[next][1].token];
        }
      }

      UPDATE_RD_COST();
      /* And pick the best. */
      best = rd_cost1 < rd_cost0;
      base_bits = vp10_get_cost(t0, e0, cat6_high_cost);

      if (shortcut) {
#if CONFIG_VP9_HIGHBITDEPTH
        if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
          dx -= ((dequant_ptr[rc != 0] >> (xd->bd - 8)) + sz) ^ sz;
        } else {
          dx -= (dequant_ptr[rc != 0] + sz) ^ sz;
        }
#else
        dx -= (dequant_ptr[rc != 0] + sz) ^ sz;
#endif  // CONFIG_VP9_HIGHBITDEPTH
        d2 = dx * dx;
      }
      tokens[i][1].rate = base_bits + (best ? rate1 : rate0);
      tokens[i][1].error = d2 + (best ? error1 : error0);
      tokens[i][1].next = next;
      tokens[i][1].token = best ? t1 : t0;
      tokens[i][1].qc = x;
      best_index[i][1] = best;
      /* Finally, make this the new head of the trellis. */
      next = i;
    } else {
      /* There's no choice to make for a zero coefficient, so we don't
       *  add a new trellis node, but we do need to update the costs.
       */
      band = band_translate[i + 1];
      t0 = tokens[next][0].token;
      t1 = tokens[next][1].token;
      /* Update the cost of each path if we're past the EOB token. */
      if (t0 != EOB_TOKEN) {
        tokens[next][0].rate +=
            mb->token_costs[tx_size][type][ref][band][1][0][t0];
        tokens[next][0].token = ZERO_TOKEN;
      }
      if (t1 != EOB_TOKEN) {
        tokens[next][1].rate +=
            mb->token_costs[tx_size][type][ref][band][1][0][t1];
        tokens[next][1].token = ZERO_TOKEN;
      }
      best_index[i][0] = best_index[i][1] = 0;
      /* Don't update next, because we didn't add a new node. */
    }
  }

  /* Now pick the best path through the whole trellis. */
  band = band_translate[i + 1];
  rate0 = tokens[next][0].rate;
  rate1 = tokens[next][1].rate;
  error0 = tokens[next][0].error;
  error1 = tokens[next][1].error;
  t0 = tokens[next][0].token;
  t1 = tokens[next][1].token;
  rate0 += mb->token_costs[tx_size][type][ref][band][0][ctx][t0];
  rate1 += mb->token_costs[tx_size][type][ref][band][0][ctx][t1];
  UPDATE_RD_COST();
  best = rd_cost1 < rd_cost0;
  final_eob = -1;
  memset(qcoeff, 0, sizeof(*qcoeff) * (16 << (tx_size * 2)));
  memset(dqcoeff, 0, sizeof(*dqcoeff) * (16 << (tx_size * 2)));
  for (i = next; i < eob; i = next) {
    const int x = tokens[i][best].qc;
    const int rc = scan[i];
    if (x) {
      final_eob = i;
    }

    qcoeff[rc] = x;
    dqcoeff[rc] = (x * dequant_ptr[rc != 0]) / mul;

    next = tokens[i][best].next;
    best = best_index[i][best];
  }
  final_eob++;

  mb->plane[plane].eobs[block] = final_eob;
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  assert(final_eob <= default_eob);
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  return final_eob;
}

static INLINE void fdct32x32(int rd_transform,
                             const int16_t *src, tran_low_t *dst,
                             int src_stride) {
  if (rd_transform)
    vpx_fdct32x32_rd(src, dst, src_stride);
  else
    vpx_fdct32x32(src, dst, src_stride);
}

#if CONFIG_VP9_HIGHBITDEPTH
static INLINE void highbd_fdct32x32(int rd_transform, const int16_t *src,
                                    tran_low_t *dst, int src_stride) {
  if (rd_transform)
    vpx_highbd_fdct32x32_rd(src, dst, src_stride);
  else
    vpx_highbd_fdct32x32(src, dst, src_stride);
}
#endif  // CONFIG_VP9_HIGHBITDEPTH

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#if CONFIG_EXT_TX
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// Forward identity transform.
static void fwd_idtx_c(const int16_t *src_diff, tran_low_t *coeff, int stride,
                       int bs) {
  int r, c;
  const int shift = bs < 32 ? 3 : 2;

  for (r = 0; r < bs; ++r) {
    for (c = 0; c < bs; ++c)
      coeff[c] = src_diff[c] << shift;
    src_diff += stride;
    coeff += bs;
  }
}
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#endif  // CONFIG_EXT_TX

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void vp10_fwd_txfm_4x4(const int16_t *src_diff, tran_low_t *coeff,
                       int diff_stride, TX_TYPE tx_type, int lossless) {
  if (lossless) {
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    assert(tx_type == DCT_DCT);
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    vp10_fwht4x4(src_diff, coeff, diff_stride);
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    return;
  }

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  switch (tx_type) {
    case DCT_DCT:
    case ADST_DCT:
    case DCT_ADST:
    case ADST_ADST:
      vp10_fht4x4(src_diff, coeff, diff_stride, tx_type);
      break;
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#if CONFIG_EXT_TX
    case FLIPADST_DCT:
    case DCT_FLIPADST:
    case FLIPADST_FLIPADST:
    case ADST_FLIPADST:
    case FLIPADST_ADST:
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      vp10_fht4x4(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case DST_DST:
    case DCT_DST:
    case DST_DCT:
    case DST_ADST:
    case ADST_DST:
    case DST_FLIPADST:
    case FLIPADST_DST:
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      // Use C version since DST exists only in C
      vp10_fht4x4_c(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case IDTX:
      fwd_idtx_c(src_diff, coeff, diff_stride, 4);
      break;
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#endif  // CONFIG_EXT_TX
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    default:
      assert(0);
      break;
  }
}

static void fwd_txfm_8x8(const int16_t *src_diff, tran_low_t *coeff,
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                         int diff_stride, TX_TYPE tx_type, void* opt_data) {
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  switch (tx_type) {
    case DCT_DCT:
    case ADST_DCT:
    case DCT_ADST:
    case ADST_ADST:
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      if (opt_data == (void*)TXFM_OPT_NORMAL)
        vp10_fht8x8(src_diff, coeff, diff_stride, tx_type);
      else  // TXFM_OPT_DC
        vpx_fdct8x8_1(src_diff, coeff, diff_stride);
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      break;
#if CONFIG_EXT_TX
    case FLIPADST_DCT:
    case DCT_FLIPADST:
    case FLIPADST_FLIPADST:
    case ADST_FLIPADST:
    case FLIPADST_ADST:
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      vp10_fht8x8(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case DST_DST:
    case DCT_DST:
    case DST_DCT:
    case DST_ADST:
    case ADST_DST:
    case DST_FLIPADST:
    case FLIPADST_DST:
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      // Use C version since DST exists only in C
      vp10_fht8x8_c(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case IDTX:
      fwd_idtx_c(src_diff, coeff, diff_stride, 8);
      break;
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#endif  // CONFIG_EXT_TX
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    default:
      assert(0);
      break;
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  }
}

static void fwd_txfm_16x16(const int16_t *src_diff, tran_low_t *coeff,
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                           int diff_stride, TX_TYPE tx_type, void* opt_data) {
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  switch (tx_type) {
    case DCT_DCT:
    case ADST_DCT:
    case DCT_ADST:
    case ADST_ADST:
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      if (opt_data == (void*)TXFM_OPT_NORMAL)
        vp10_fht16x16(src_diff, coeff, diff_stride, tx_type);
      else  // TXFM_OPT_DC
        vpx_fdct16x16_1(src_diff, coeff, diff_stride);
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      break;
#if CONFIG_EXT_TX
    case FLIPADST_DCT:
    case DCT_FLIPADST:
    case FLIPADST_FLIPADST:
    case ADST_FLIPADST:
    case FLIPADST_ADST:
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      vp10_fht16x16(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case DST_DST:
    case DCT_DST:
    case DST_DCT:
    case DST_ADST:
    case ADST_DST:
    case DST_FLIPADST:
    case FLIPADST_DST:
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      // Use C version since DST exists only in C
      vp10_fht16x16_c(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case IDTX:
      fwd_idtx_c(src_diff, coeff, diff_stride, 16);
      break;
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#endif  // CONFIG_EXT_TX
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    default:
      assert(0);
      break;
  }
}

static void fwd_txfm_32x32(int rd_transform, const int16_t *src_diff,
                           tran_low_t *coeff, int diff_stride,
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                           TX_TYPE tx_type, void* opt_data) {
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  switch (tx_type) {
    case DCT_DCT:
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      if (opt_data == (void*)TXFM_OPT_NORMAL)
        fdct32x32(rd_transform, src_diff, coeff, diff_stride);
      else  // TXFM_OPT_DC
        vpx_fdct32x32_1(src_diff, coeff, diff_stride);
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      break;
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#if CONFIG_EXT_TX
    case IDTX:
      fwd_idtx_c(src_diff, coeff, diff_stride, 32);
      break;
#endif  // CONFIG_EXT_TX
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    case ADST_DCT:
    case DCT_ADST:
    case ADST_ADST:
      assert(0);
      break;
    default:
      assert(0);
      break;
  }
}

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#if CONFIG_VP9_HIGHBITDEPTH
void vp10_highbd_fwd_txfm_4x4(const int16_t *src_diff, tran_low_t *coeff,
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                              int diff_stride, TX_TYPE tx_type, int lossless) {
  if (lossless) {
    assert(tx_type == DCT_DCT);
    vp10_highbd_fwht4x4(src_diff, coeff, diff_stride);
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    return;
  }

  switch (tx_type) {
    case DCT_DCT:
    case ADST_DCT:
    case DCT_ADST:
    case ADST_ADST:
      vp10_highbd_fht4x4(src_diff, coeff, diff_stride, tx_type);
      break;
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#if CONFIG_EXT_TX
    case FLIPADST_DCT:
    case DCT_FLIPADST:
    case FLIPADST_FLIPADST:
    case ADST_FLIPADST:
    case FLIPADST_ADST:
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      vp10_highbd_fht4x4(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case DST_DST:
    case DCT_DST:
    case DST_DCT:
    case DST_ADST:
    case ADST_DST:
    case DST_FLIPADST:
    case FLIPADST_DST:
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      // Use C version since DST exists only in C
      vp10_highbd_fht4x4_c(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case IDTX:
      fwd_idtx_c(src_diff, coeff, diff_stride, 4);
      break;
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#endif  // CONFIG_EXT_TX
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    default:
      assert(0);
      break;
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  }
}

static void highbd_fwd_txfm_8x8(const int16_t *src_diff, tran_low_t *coeff,
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                                int diff_stride, TX_TYPE tx_type, void* opt_data) {
  (void)opt_data;
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  switch (tx_type) {
    case DCT_DCT:
    case ADST_DCT:
    case DCT_ADST:
    case ADST_ADST:
      vp10_highbd_fht8x8(src_diff, coeff, diff_stride, tx_type);
      break;
#if CONFIG_EXT_TX
    case FLIPADST_DCT:
    case DCT_FLIPADST:
    case FLIPADST_FLIPADST:
    case ADST_FLIPADST:
    case FLIPADST_ADST:
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      vp10_highbd_fht8x8(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case DST_DST:
    case DCT_DST:
    case DST_DCT:
    case DST_ADST:
    case ADST_DST:
    case DST_FLIPADST:
    case FLIPADST_DST:
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      // Use C version since DST exists only in C
      vp10_highbd_fht8x8_c(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case IDTX:
      fwd_idtx_c(src_diff, coeff, diff_stride, 8);
      break;
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#endif  // CONFIG_EXT_TX
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    default:
      assert(0);
      break;
  }
}

static void highbd_fwd_txfm_16x16(const int16_t *src_diff, tran_low_t *coeff,
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                                  int diff_stride, TX_TYPE tx_type, void* opt_data) {
  (void)opt_data;
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  switch (tx_type) {
    case DCT_DCT:
    case ADST_DCT:
    case DCT_ADST:
    case ADST_ADST:
      vp10_highbd_fht16x16(src_diff, coeff, diff_stride, tx_type);
      break;
#if CONFIG_EXT_TX
    case FLIPADST_DCT:
    case DCT_FLIPADST:
    case FLIPADST_FLIPADST:
    case ADST_FLIPADST:
    case FLIPADST_ADST:
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      vp10_highbd_fht16x16(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case DST_DST:
    case DCT_DST:
    case DST_DCT:
    case DST_ADST:
    case ADST_DST:
    case DST_FLIPADST:
    case FLIPADST_DST:
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      // Use C version since DST exists only in C
      vp10_highbd_fht16x16_c(src_diff, coeff, diff_stride, tx_type);
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      break;
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    case IDTX:
      fwd_idtx_c(src_diff, coeff, diff_stride, 16);
      break;
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#endif  // CONFIG_EXT_TX
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    default:
      assert(0);
      break;
  }
}

static void highbd_fwd_txfm_32x32(int rd_transform, const int16_t *src_diff,
                                  tran_low_t *coeff, int diff_stride,
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                                  TX_TYPE tx_type, void* opt_data) {
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  switch (tx_type) {
    case DCT_DCT:
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      if (opt_data == (void*)TXFM_OPT_NORMAL)
        highbd_fdct32x32(rd_transform, src_diff, coeff, diff_stride);
      else  // TXFM_OPT_DC
        vpx_highbd_fdct32x32_1(src_diff, coeff, diff_stride);
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      break;
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#if CONFIG_EXT_TX
    case IDTX:
      fwd_idtx_c(src_diff, coeff, diff_stride, 32);
      break;
#endif  // CONFIG_EXT_TX
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    case ADST_DCT:
    case DCT_ADST:
    case ADST_ADST:
      assert(0);
      break;
    default:
      assert(0);
      break;
  }
}
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#endif  // CONFIG_VP9_HIGHBITDEPTH

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void vp10_xform_quant_fp(MACROBLOCK *x, int plane, int block,
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                         int blk_row, int blk_col,
                         BLOCK_SIZE plane_bsize, TX_SIZE tx_size) {
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  MACROBLOCKD *const xd = &x->e_mbd;
  const struct macroblock_plane *const p = &x->plane[plane];
  const struct macroblockd_plane *const pd = &xd->plane[plane];
  PLANE_TYPE plane_type = (plane == 0) ? PLANE_TYPE_Y : PLANE_TYPE_UV;
  TX_TYPE tx_type = get_tx_type(plane_type, xd, block, tx_size);
  const scan_order *const scan_order =
      get_scan(tx_size, tx_type, is_inter_block(&xd->mi[0]->mbmi));
  tran_low_t *const coeff = BLOCK_OFFSET(p->coeff, block);
  tran_low_t *const qcoeff = BLOCK_OFFSET(p->qcoeff, block);
  tran_low_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
  uint16_t *const eob = &p->eobs[block];
  const int diff_stride = 4 * num_4x4_blocks_wide_lookup[plane_bsize];
  const int16_t *src_diff;
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  src_diff = &p->src_diff[4 * (blk_row * diff_stride + blk_col)];
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#if CONFIG_VP9_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    switch (tx_size) {
      case TX_32X32:
        highbd_fwd_txfm_32x32(x->use_lp32x32fdct, src_diff, coeff, diff_stride,
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                              tx_type, (void*)TXFM_OPT_NORMAL);
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        vp10_highbd_quantize_fp_32x32(coeff, 1024, x->skip_block, p->zbin,
                                      p->round_fp, p->quant_fp, p->quant_shift,
                                      qcoeff, dqcoeff, pd->dequant,
                                      eob, scan_order->scan,
                                      scan_order->iscan);
        break;
      case TX_16X16:
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        highbd_fwd_txfm_16x16(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_NORMAL);
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        vp10_highbd_quantize_fp(coeff, 256, x->skip_block, p->zbin, p->round_fp,
                                p->quant_fp, p->quant_shift, qcoeff, dqcoeff,
                                pd->dequant, eob,
                                scan_order->scan, scan_order->iscan);
        break;
      case TX_8X8:
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        highbd_fwd_txfm_8x8(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_NORMAL);
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        vp10_highbd_quantize_fp(coeff, 64, x->skip_block, p->zbin, p->round_fp,
                                p->quant_fp, p->quant_shift, qcoeff, dqcoeff,
                                pd->dequant, eob,
                                scan_order->scan, scan_order->iscan);
        break;
      case TX_4X4:
        vp10_highbd_fwd_txfm_4x4(src_diff, coeff, diff_stride, tx_type,
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                                 xd->lossless[xd->mi[0]->mbmi.segment_id]);
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        vp10_highbd_quantize_fp(coeff, 16, x->skip_block, p->zbin, p->round_fp,
                                p->quant_fp, p->quant_shift, qcoeff, dqcoeff,
                                pd->dequant, eob,
                                scan_order->scan, scan_order->iscan);
        break;
      default:
        assert(0);
    }
    return;
  }
#endif  // CONFIG_VP9_HIGHBITDEPTH

  switch (tx_size) {
    case TX_32X32:
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      fwd_txfm_32x32(x->use_lp32x32fdct, src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_NORMAL);
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      vp10_quantize_fp_32x32(coeff, 1024, x->skip_block, p->zbin, p->round_fp,
                             p->quant_fp, p->quant_shift, qcoeff, dqcoeff,
                             pd->dequant, eob, scan_order->scan,
                             scan_order->iscan);
      break;
    case TX_16X16:
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      fwd_txfm_16x16(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_NORMAL);
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      vp10_quantize_fp(coeff, 256, x->skip_block, p->zbin, p->round_fp,
                       p->quant_fp, p->quant_shift, qcoeff, dqcoeff,
                       pd->dequant, eob,
                       scan_order->scan, scan_order->iscan);
      break;
    case TX_8X8:
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      fwd_txfm_8x8(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_NORMAL);
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      vp10_quantize_fp(coeff, 64, x->skip_block, p->zbin, p->round_fp,
                       p->quant_fp, p->quant_shift, qcoeff, dqcoeff,
                       pd->dequant, eob,
                       scan_order->scan, scan_order->iscan);
      break;
    case TX_4X4:
      vp10_fwd_txfm_4x4(src_diff, coeff, diff_stride, tx_type,
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                        xd->lossless[xd->mi[0]->mbmi.segment_id]);
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      vp10_quantize_fp(coeff, 16, x->skip_block, p->zbin, p->round_fp,
                       p->quant_fp, p->quant_shift, qcoeff, dqcoeff,
                       pd->dequant, eob,
                       scan_order->scan, scan_order->iscan);
      break;
    default:
      assert(0);
      break;
  }
}

void vp10_xform_quant_dc(MACROBLOCK *x, int plane, int block,
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                         int blk_row, int blk_col,
                         BLOCK_SIZE plane_bsize, TX_SIZE tx_size) {
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  MACROBLOCKD *const xd = &x->e_mbd;
  const struct macroblock_plane *const p = &x->plane[plane];
  const struct macroblockd_plane *const pd = &xd->plane[plane];
  PLANE_TYPE plane_type = (plane == 0) ? PLANE_TYPE_Y : PLANE_TYPE_UV;
  TX_TYPE tx_type = get_tx_type(plane_type, xd, block, tx_size);
  tran_low_t *const coeff = BLOCK_OFFSET(p->coeff, block);
  tran_low_t *const qcoeff = BLOCK_OFFSET(p->qcoeff, block);
  tran_low_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
  uint16_t *const eob = &p->eobs[block];
  const int diff_stride = 4 * num_4x4_blocks_wide_lookup[plane_bsize];
  const int16_t *src_diff;
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  src_diff = &p->src_diff[4 * (blk_row * diff_stride + blk_col)];
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#if CONFIG_VP9_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    switch (tx_size) {
      case TX_32X32:
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        highbd_fwd_txfm_32x32(0, src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_DC);
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        vpx_highbd_quantize_dc_32x32(coeff, x->skip_block, p->round,
                                     p->quant_fp[0], qcoeff, dqcoeff,
                                     pd->dequant[0], eob);
        break;
      case TX_16X16:
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        highbd_fwd_txfm_16x16(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_DC);
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        vpx_highbd_quantize_dc(coeff, 256, x->skip_block, p->round,
                               p->quant_fp[0], qcoeff, dqcoeff,
                               pd->dequant[0], eob);
        break;
      case TX_8X8:
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        highbd_fwd_txfm_8x8(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_DC);
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        vpx_highbd_quantize_dc(coeff, 64, x->skip_block, p->round,
                               p->quant_fp[0], qcoeff, dqcoeff,
                               pd->dequant[0], eob);
        break;
      case TX_4X4:
        vp10_highbd_fwd_txfm_4x4(src_diff, coeff, diff_stride, tx_type,
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                                 xd->lossless[xd->mi[0]->mbmi.segment_id]);
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        vpx_highbd_quantize_dc(coeff, 16, x->skip_block, p->round,
                               p->quant_fp[0], qcoeff, dqcoeff,
                               pd->dequant[0], eob);
        break;
      default:
        assert(0);
    }
    return;
  }
#endif  // CONFIG_VP9_HIGHBITDEPTH

  switch (tx_size) {
    case TX_32X32:
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      fwd_txfm_32x32(0, src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_DC);
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      vpx_quantize_dc_32x32(coeff, x->skip_block, p->round,
                            p->quant_fp[0], qcoeff, dqcoeff,
                            pd->dequant[0], eob);
      break;
    case TX_16X16:
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      fwd_txfm_16x16(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_DC);
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      vpx_quantize_dc(coeff, 256, x->skip_block, p->round,
                     p->quant_fp[0], qcoeff, dqcoeff,
                     pd->dequant[0], eob);
      break;
    case TX_8X8:
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      fwd_txfm_8x8(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_DC);
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      vpx_quantize_dc(coeff, 64, x->skip_block, p->round,
                      p->quant_fp[0], qcoeff, dqcoeff,
                      pd->dequant[0], eob);
      break;
    case TX_4X4:
      vp10_fwd_txfm_4x4(src_diff, coeff, diff_stride, tx_type,
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                        xd->lossless[xd->mi[0]->mbmi.segment_id]);
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      vpx_quantize_dc(coeff, 16, x->skip_block, p->round,
                      p->quant_fp[0], qcoeff, dqcoeff,
                      pd->dequant[0], eob);
      break;
    default:
      assert(0);
      break;
  }
}

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void vp10_xform_quant(MACROBLOCK *x, int plane, int block,
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                      int blk_row, int blk_col,
                      BLOCK_SIZE plane_bsize, TX_SIZE tx_size) {
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  MACROBLOCKD *const xd = &x->e_mbd;
  const struct macroblock_plane *const p = &x->plane[plane];
  const struct macroblockd_plane *const pd = &xd->plane[plane];
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  PLANE_TYPE plane_type = (plane == 0) ? PLANE_TYPE_Y : PLANE_TYPE_UV;
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  TX_TYPE tx_type = get_tx_type(plane_type, xd, block, tx_size);
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  const scan_order *const scan_order =
      get_scan(tx_size, tx_type, is_inter_block(&xd->mi[0]->mbmi));
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  tran_low_t *const coeff = BLOCK_OFFSET(p->coeff, block);
  tran_low_t *const qcoeff = BLOCK_OFFSET(p->qcoeff, block);
  tran_low_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
  uint16_t *const eob = &p->eobs[block];
  const int diff_stride = 4 * num_4x4_blocks_wide_lookup[plane_bsize];
  const int16_t *src_diff;
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  src_diff = &p->src_diff[4 * (blk_row * diff_stride + blk_col)];
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#if CONFIG_VP9_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
     switch (tx_size) {
      case TX_32X32:
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        highbd_fwd_txfm_32x32(x->use_lp32x32fdct, src_diff, coeff, diff_stride,
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                              tx_type, (void*)TXFM_OPT_NORMAL);
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        vpx_highbd_quantize_b_32x32(coeff, 1024, x->skip_block, p->zbin,
                                    p->round, p->quant, p->quant_shift, qcoeff,
                                    dqcoeff, pd->dequant, eob,
                                    scan_order->scan, scan_order->iscan);
        break;
      case TX_16X16:
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        highbd_fwd_txfm_16x16(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_NORMAL);
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        vpx_highbd_quantize_b(coeff, 256, x->skip_block, p->zbin, p->round,
                              p->quant, p->quant_shift, qcoeff, dqcoeff,
                              pd->dequant, eob,
                              scan_order->scan, scan_order->iscan);
        break;
      case TX_8X8:
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        highbd_fwd_txfm_8x8(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_NORMAL);
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        vpx_highbd_quantize_b(coeff, 64, x->skip_block, p->zbin, p->round,
                              p->quant, p->quant_shift, qcoeff, dqcoeff,
                              pd->dequant, eob,
                              scan_order->scan, scan_order->iscan);
        break;
      case TX_4X4:
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        vp10_highbd_fwd_txfm_4x4(src_diff, coeff, diff_stride, tx_type,
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                                 xd->lossless[xd->mi[0]->mbmi.segment_id]);
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        vpx_highbd_quantize_b(coeff, 16, x->skip_block, p->zbin, p->round,
                              p->quant, p->quant_shift, qcoeff, dqcoeff,
                              pd->dequant, eob,
                              scan_order->scan, scan_order->iscan);
        break;
      default:
        assert(0);
    }
    return;
  }
#endif  // CONFIG_VP9_HIGHBITDEPTH

  switch (tx_size) {
    case TX_32X32:
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      fwd_txfm_32x32(x->use_lp32x32fdct, src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_NORMAL);
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      vpx_quantize_b_32x32(coeff, 1024, x->skip_block, p->zbin, p->round,
                           p->quant, p->quant_shift, qcoeff, dqcoeff,
                           pd->dequant, eob, scan_order->scan,
                           scan_order->iscan);
      break;
    case TX_16X16:
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      fwd_txfm_16x16(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_NORMAL);
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      vpx_quantize_b(coeff, 256, x->skip_block, p->zbin, p->round,
                     p->quant, p->quant_shift, qcoeff, dqcoeff,
                     pd->dequant, eob,
                     scan_order->scan, scan_order->iscan);
      break;
    case TX_8X8:
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      fwd_txfm_8x8(src_diff, coeff, diff_stride, tx_type, (void*)TXFM_OPT_NORMAL);
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      vpx_quantize_b(coeff, 64, x->skip_block, p->zbin, p->round,
                     p->quant, p->quant_shift, qcoeff, dqcoeff,
                     pd->dequant, eob,
                     scan_order->scan, scan_order->iscan);
      break;
    case TX_4X4:
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      vp10_fwd_txfm_4x4(src_diff, coeff, diff_stride, tx_type,
                        xd->lossless[xd->mi[0]->mbmi.segment_id]);
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      vpx_quantize_b(coeff, 16, x->skip_block, p->zbin, p->round,
                     p->quant, p->quant_shift, qcoeff, dqcoeff,
                     pd->dequant, eob,
                     scan_order->scan, scan_order->iscan);
      break;
    default:
      assert(0);
      break;
  }
}

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static void encode_block(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 encode_b_args *const args = arg;
  MACROBLOCK *const x = args->x;
  MACROBLOCKD *const xd = &x->e_mbd;
  struct optimize_ctx *const ctx = args->ctx;
  struct macroblock_plane *const p = &x->plane[plane];
  struct macroblockd_plane *const pd = &xd->plane[plane];
  tran_low_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
  uint8_t *dst;
  ENTROPY_CONTEXT *a, *l;
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  TX_TYPE tx_type = get_tx_type(pd->plane_type, xd, block, tx_size);
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#if CONFIG_VAR_TX
  int i;
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  const int bwl = b_width_log2_lookup[plane_bsize];
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#endif
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  dst = &pd->dst.buf[4 * blk_row * pd->dst.stride + 4 * blk_col];
  a = &ctx->ta[plane][blk_col];
  l = &ctx->tl[plane][blk_row];
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  // TODO(jingning): per transformed block zero forcing only enabled for
  // luma component. will integrate chroma components as well.
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  // Turn this back on when the rate-distortion loop is synchronized with
  // the recursive transform block coding.
//  if (x->zcoeff_blk[tx_size][block] && plane == 0) {
//    p->eobs[block] = 0;
//    *a = *l = 0;
//    return;
//  }
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#if CONFIG_VAR_TX
  if (!x->skip_recode &&
      x->blk_skip[plane][(blk_row << bwl) + blk_col] == 0) {
#else
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  if (!x->skip_recode) {
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#endif
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    if (x->quant_fp) {
      // Encoding process for rtc mode
      if (x->skip_txfm[0] == SKIP_TXFM_AC_DC && plane == 0) {
        // skip forward transform
        p->eobs[block] = 0;
        *a = *l = 0;
        return;
      } else {
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        vp10_xform_quant_fp(x, plane, block, blk_row, blk_col,
                            plane_bsize, tx_size);
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      }
    } else {
      if (max_txsize_lookup[plane_bsize] == tx_size) {
        int txfm_blk_index = (plane << 2) + (block >> (tx_size << 1));
        if (x->skip_txfm[txfm_blk_index] == SKIP_TXFM_NONE) {
          // full forward transform and quantization
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          vp10_xform_quant(x, plane, block, blk_row, blk_col,
                           plane_bsize, tx_size);
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        } else if (x->skip_txfm[txfm_blk_index] == SKIP_TXFM_AC_ONLY) {
          // fast path forward transform and quantization
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          vp10_xform_quant_dc(x, plane, block, blk_row, blk_col,
                              plane_bsize, tx_size);
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        } else {
          // skip forward transform
          p->eobs[block] = 0;
          *a = *l = 0;
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#if !CONFIG_VAR_TX
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          return;
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#endif
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        }
      } else {
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        vp10_xform_quant(x, plane, block, blk_row, blk_col,
                         plane_bsize, tx_size);
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      }
    }
  }
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#if CONFIG_VAR_TX
  else {
    if (!x->skip_recode)
      p->eobs[block] = 0;
  }
#endif
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  if (x->optimize && (!x->skip_recode || !x->skip_optimize)) {
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    int ctx;
#if CONFIG_VAR_TX
    switch (tx_size) {
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