/*

 *  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 <stdlib.h>

#include "./vp9_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"

#if CONFIG_MISMATCH_DEBUG

#include "vpx_util/vpx_debug_util.h"

#endif

#include "vp9/common/vp9_idct.h"

#include "vp9/common/vp9_reconinter.h"

#include "vp9/common/vp9_reconintra.h"

#include "vp9/common/vp9_scan.h"

#include "vp9/encoder/vp9_encodemb.h"

#include "vp9/encoder/vp9_encoder.h"

#include "vp9/encoder/vp9_rd.h"

#include "vp9/encoder/vp9_tokenize.h"

#if defined(NDEBUG)

#if defined(__clang__) && defined(__has_builtin)

#if __has_builtin(__builtin_assume)

// This is verified by test/vp9_scan_test.cc

#define ASSUME_VALID_SCAN_VALUE(i) \

  __builtin_assume(0 <= i && i <= MAX_SCAN_VALUE)

// This is verified by test/vp9_entropy_test.cc

#define ASSUME_VALID_ENERGY_CLASS(i) \

  __builtin_assume(0 <= i && i <= MAX_ENERGY_CLASS)

#define ASSUME_VALID_TOKEN(i) __builtin_assume(0 <= i && i <= MAX_TOKEN)

#else

#define ASSUME_VALID_SCAN_VALUE(i) \

  do {                             \

  } while (0)

#define ASSUME_VALID_ENERGY_CLASS(i) \

  do {                               \

  } while (0)

#define ASSUME_VALID_TOKEN(i) \

  do {                        \

  } while (0)

#endif

#else

#define ASSUME_VALID_SCAN_VALUE(i) \

  do {                             \

  } while (0)

#define ASSUME_VALID_ENERGY_CLASS(i) \

  do {                               \

  } while (0)

#define ASSUME_VALID_TOKEN(i) \

  do {                        \

  } while (0)

#endif

#else

#define ASSUME_VALID_SCAN_VALUE(i) assert(0 <= i && i <= MAX_SCAN_VALUE)

#define ASSUME_VALID_ENERGY_CLASS(i) assert(0 <= i && i <= MAX_ENERGY_CLASS)

#define ASSUME_VALID_TOKEN(i) assert(0 <= i && i <= MAX_TOKEN)

#endif

struct optimize_ctx {

  ENTROPY_CONTEXT ta[MAX_MB_PLANE][16];

  ENTROPY_CONTEXT tl[MAX_MB_PLANE][16];

};

void vp9_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);

}

static const int plane_rd_mult[REF_TYPES][PLANE_TYPES] = {

  { 10, 6 },

  { 8, 5 },

};

// 'num' can be negative, but 'shift' must be non-negative.

#define RIGHT_SHIFT_POSSIBLY_NEGATIVE(num, shift) \

  (((num) >= 0) ? (num) >> (shift) : -((-(num)) >> (shift)))

int vp9_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]);

  uint8_t token_cache[MAX_SCAN_VALUE + 1];

  const 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);

  const int eob = p->eobs[block];

  const PLANE_TYPE plane_type = get_plane_type(plane);

  const int default_eob = 16 << (tx_size << 1);

  const int shift = (tx_size == TX_32X32);

  const int16_t *const dequant_ptr = pd->dequant;

  const uint8_t *const band_translate = get_band_translate(tx_size);

  const ScanOrder *const so = get_scan(xd, tx_size, plane_type, block);

  const int16_t *const scan = so->scan;

  const int16_t *const nb = so->neighbors;

  const MODE_INFO *mbmi = xd->mi[0];

  const int sharpness = mb->sharpness;

  const int64_t rdadj = (int64_t)mb->rdmult * plane_rd_mult[ref][plane_type];

  const int64_t rdmult =

      (sharpness == 0 ? rdadj >> 1

                      : (rdadj * (8 - sharpness + mbmi->segment_id)) >> 4);

  const int64_t rddiv = mb->rddiv;

  int64_t rd_cost0, rd_cost1;

  int64_t rate0, rate1;

  int16_t t0, t1;

  int i, final_eob;

  int count_high_values_after_eob = 0;

#if CONFIG_VP9_HIGHBITDEPTH

  const uint16_t *cat6_high_cost = vp9_get_high_cost_table(xd->bd);

#else

  const uint16_t *cat6_high_cost = vp9_get_high_cost_table(8);

#endif

  unsigned int(*const token_costs)[2][COEFF_CONTEXTS][ENTROPY_TOKENS] =

      mb->token_costs[tx_size][plane_type][ref];

  unsigned int(*token_costs_cur)[2][COEFF_CONTEXTS][ENTROPY_TOKENS];

  int64_t eob_cost0, eob_cost1;

  int64_t accu_rate = 0;

  // Initialized to the worst possible error for the largest transform size.

  // This ensures that it never goes negative.

  int64_t accu_error = ((int64_t)1) << 50;

  int64_t best_block_rd_cost = INT64_MAX;

  int x_prev = 1;

  tran_low_t before_best_eob_qc = 0;

  tran_low_t before_best_eob_dqc = 0;

  assert((!plane_type && !plane) || (plane_type && plane));

  assert(eob <= default_eob);

  for (i = 0; i < eob; i++) {

    const int rc = scan[i];

    ASSUME_VALID_SCAN_VALUE(rc);

    int16_t token = vp9_get_token(qcoeff[rc]);

    ASSUME_VALID_TOKEN(token);

    token_cache[rc] = vp9_pt_energy_class[token];

  }

  final_eob = 0;

  // This is used in the first iteration, and must be inbounds. We cannot

  // locally verify that this is in bounds, so we need to verify at runtime.

  // For now, only verify if we have array-bounds turned on.

#if defined(__clang__) && defined(__has_feature)

#if __has_feature(array_bounds_sanitizer)

  if (ctx < 0 || ctx > MAX_ENERGY_CLASS) {

    abort();

  }

#endif

#endif

  // Initial RD cost.

  token_costs_cur = token_costs + band_translate[0];

  rate0 = (*token_costs_cur)[0][ctx][EOB_TOKEN];

  best_block_rd_cost = RDCOST(rdmult, rddiv, rate0, accu_error);

  // For each token, pick one of two choices greedily:

  // (i) First candidate: Keep current quantized value, OR

  // (ii) Second candidate: Reduce quantized value by 1.

  for (i = 0; i < eob; i++) {

    const int rc = scan[i];

    ASSUME_VALID_SCAN_VALUE(rc);

    const int x = qcoeff[rc];

    const int band_cur = band_translate[i];

    const int ctx_cur = (i == 0) ? ctx : get_coef_context(nb, token_cache, i);

    ASSUME_VALID_ENERGY_CLASS(ctx_cur);

    const int token_tree_sel_cur = (x_prev == 0);

    token_costs_cur = token_costs + band_cur;

    if (x == 0) {  // No need to search

      const int token = vp9_get_token(x);

      ASSUME_VALID_TOKEN(token);

      rate0 = (*token_costs_cur)[token_tree_sel_cur][ctx_cur][token];

      accu_rate += rate0;

      x_prev = 0;

      // Note: accu_error does not change.

    } else {

      const int dqv = dequant_ptr[rc != 0];

      // Compute the distortion for quantizing to 0.

      const int diff_for_zero_raw = (0 - coeff[rc]) * (1 << shift);

      const int diff_for_zero =

#if CONFIG_VP9_HIGHBITDEPTH

          (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)

              ? RIGHT_SHIFT_POSSIBLY_NEGATIVE(diff_for_zero_raw, xd->bd - 8)

              :

#endif

              diff_for_zero_raw;

      const int64_t distortion_for_zero =

          (int64_t)diff_for_zero * diff_for_zero;

      // Compute the distortion for the first candidate

      const int diff0_raw = (dqcoeff[rc] - coeff[rc]) * (1 << shift);

      const int diff0 =

#if CONFIG_VP9_HIGHBITDEPTH

          (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH)

              ? RIGHT_SHIFT_POSSIBLY_NEGATIVE(diff0_raw, xd->bd - 8)

              :

#endif  // CONFIG_VP9_HIGHBITDEPTH

              diff0_raw;

      const int64_t distortion0 = (int64_t)diff0 * diff0;

      // Compute the distortion for the second candidate

      const int sign = -(x < 0);        // -1 if x is negative and 0 otherwise.

      const int x1 = x - 2 * sign - 1;  // abs(x1) = abs(x) - 1.

      int64_t distortion1;

      if (x1 != 0) {

        const int dqv_step =

#if CONFIG_VP9_HIGHBITDEPTH

            (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) ? dqv >> (xd->bd - 8)

                                                          :

#endif  // CONFIG_VP9_HIGHBITDEPTH

                                                          dqv;

        const int diff_step = (dqv_step + sign) ^ sign;

        const int diff1 = diff0 - diff_step;

        assert(dqv > 0);  // We aren't right shifting a negative number above.

        distortion1 = (int64_t)diff1 * diff1;

      } else {

        distortion1 = distortion_for_zero;

      }

      {

        // Calculate RDCost for current coeff for the two candidates.

        const int64_t base_bits0 = vp9_get_token_cost(x, &t0, cat6_high_cost);

        const int64_t base_bits1 = vp9_get_token_cost(x1, &t1, cat6_high_cost);

        rate0 =

            base_bits0 + (*token_costs_cur)[token_tree_sel_cur][ctx_cur][t0];

        rate1 =

            base_bits1 + (*token_costs_cur)[token_tree_sel_cur][ctx_cur][t1];

      }

      {

        int rdcost_better_for_x1, eob_rdcost_better_for_x1;

        int dqc0, dqc1;

        int64_t best_eob_cost_cur;

        int use_x1;

        // Calculate RD Cost effect on the next coeff for the two candidates.

        int64_t next_bits0 = 0;

        int64_t next_bits1 = 0;

        int64_t next_eob_bits0 = 0;

        int64_t next_eob_bits1 = 0;

        if (i < default_eob - 1) {

          int ctx_next, token_tree_sel_next;

          const int band_next = band_translate[i + 1];

          const int token_next =

              (i + 1 != eob) ? vp9_get_token(qcoeff[scan[i + 1]]) : EOB_TOKEN;

          ASSUME_VALID_TOKEN(token_next);

          unsigned int(*const token_costs_next)[2][COEFF_CONTEXTS]

                                               [ENTROPY_TOKENS] =

                                                   token_costs + band_next;

          token_cache[rc] = vp9_pt_energy_class[t0];

          ctx_next = get_coef_context(nb, token_cache, i + 1);

          // token_cache is initialized with valid energy classes.

          // get_coef_context returns at most the maximum value of

          // token_cache.

          ASSUME_VALID_ENERGY_CLASS(ctx_next);

          token_tree_sel_next = (x == 0);

          next_bits0 =

              (*token_costs_next)[token_tree_sel_next][ctx_next][token_next];

          next_eob_bits0 =

              (*token_costs_next)[token_tree_sel_next][ctx_next][EOB_TOKEN];

          token_cache[rc] = vp9_pt_energy_class[t1];

          ctx_next = get_coef_context(nb, token_cache, i + 1);

          // token_cache is initialized with valid energy classes.

          // get_coef_context returns at most the maximum value of

          // token_cache.

          ASSUME_VALID_ENERGY_CLASS(ctx_next);

          token_tree_sel_next = (x1 == 0);

          next_bits1 =

              (*token_costs_next)[token_tree_sel_next][ctx_next][token_next];

          if (x1 != 0) {

            next_eob_bits1 =

                (*token_costs_next)[token_tree_sel_next][ctx_next][EOB_TOKEN];

          }

        }

        // Compare the total RD costs for two candidates.

        rd_cost0 = RDCOST(rdmult, rddiv, (rate0 + next_bits0), distortion0);

        rd_cost1 = RDCOST(rdmult, rddiv, (rate1 + next_bits1), distortion1);

        rdcost_better_for_x1 = (rd_cost1 < rd_cost0);

        eob_cost0 = RDCOST(rdmult, rddiv, (accu_rate + rate0 + next_eob_bits0),

                           (accu_error + distortion0 - distortion_for_zero));

        eob_cost1 = eob_cost0;

        if (x1 != 0) {

          eob_cost1 =

              RDCOST(rdmult, rddiv, (accu_rate + rate1 + next_eob_bits1),

                     (accu_error + distortion1 - distortion_for_zero));

          eob_rdcost_better_for_x1 = (eob_cost1 < eob_cost0);

        } else {

          eob_rdcost_better_for_x1 = 0;

        }

        // Calculate the two candidate de-quantized values.

        dqc0 = dqcoeff[rc];

        dqc1 = 0;

        if (rdcost_better_for_x1 + eob_rdcost_better_for_x1) {

          if (x1 != 0) {

            dqc1 = RIGHT_SHIFT_POSSIBLY_NEGATIVE(x1 * dqv, shift);

          } else {

            dqc1 = 0;

          }

        }

        // Pick and record the better quantized and de-quantized values.

        if (rdcost_better_for_x1) {

          qcoeff[rc] = x1;

          dqcoeff[rc] = dqc1;

          accu_rate += rate1;

          accu_error += distortion1 - distortion_for_zero;

          assert(distortion1 <= distortion_for_zero);

          token_cache[rc] = vp9_pt_energy_class[t1];

        } else {

          accu_rate += rate0;

          accu_error += distortion0 - distortion_for_zero;

          assert(distortion0 <= distortion_for_zero);

          token_cache[rc] = vp9_pt_energy_class[t0];

        }

        if (sharpness > 0 && abs(qcoeff[rc]) > 1) count_high_values_after_eob++;

        assert(accu_error >= 0);

        x_prev = qcoeff[rc];  // Update based on selected quantized value.

        use_x1 = (x1 != 0) && eob_rdcost_better_for_x1;

        best_eob_cost_cur = use_x1 ? eob_cost1 : eob_cost0;

        // Determine whether to move the eob position to i+1

        if (best_eob_cost_cur < best_block_rd_cost) {

          best_block_rd_cost = best_eob_cost_cur;

          final_eob = i + 1;

          count_high_values_after_eob = 0;

          if (use_x1) {

            before_best_eob_qc = x1;

            before_best_eob_dqc = dqc1;

          } else {

            before_best_eob_qc = x;

            before_best_eob_dqc = dqc0;

          }

        }

      }

    }

  }

  if (count_high_values_after_eob > 0) {

    final_eob = eob - 1;

    for (; final_eob >= 0; final_eob--) {

      const int rc = scan[final_eob];

      ASSUME_VALID_SCAN_VALUE(rc);

      const int x = qcoeff[rc];

      if (x) {

        break;

      }

    }

    final_eob++;

  } else {

    assert(final_eob <= eob);

    if (final_eob > 0) {

      int rc;

      assert(before_best_eob_qc != 0);

      i = final_eob - 1;

      rc = scan[i];

      ASSUME_VALID_SCAN_VALUE(rc);

      qcoeff[rc] = before_best_eob_qc;

      dqcoeff[rc] = before_best_eob_dqc;

    }

    for (i = final_eob; i < eob; i++) {

      int rc = scan[i];

      ASSUME_VALID_SCAN_VALUE(rc);

      qcoeff[rc] = 0;

      dqcoeff[rc] = 0;

    }

  }

  mb->plane[plane].eobs[block] = final_eob;

  return final_eob;

}

#undef RIGHT_SHIFT_POSSIBLY_NEGATIVE

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

void vp9_xform_quant_fp(MACROBLOCK *x, int plane, int block, int row, int col,

                        BLOCK_SIZE plane_bsize, TX_SIZE tx_size) {

  MACROBLOCKD *const xd = &x->e_mbd;

  const struct macroblock_plane *const p = &x->plane[plane];

  const struct macroblockd_plane *const pd = &xd->plane[plane];

  const ScanOrder *const scan_order = &vp9_default_scan_orders[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;

  src_diff = &p->src_diff[4 * (row * diff_stride + col)];

  // skip block condition should be handled before this is called.

  assert(!x->skip_block);

#if CONFIG_VP9_HIGHBITDEPTH

  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {

    switch (tx_size) {

      case TX_32X32:

        highbd_fdct32x32(x->use_lp32x32fdct, src_diff, coeff, diff_stride);

        vp9_highbd_quantize_fp_32x32(coeff, 1024, p, qcoeff, dqcoeff,

                                     pd->dequant, eob, scan_order);

        break;

      case TX_16X16:

        vpx_highbd_fdct16x16(src_diff, coeff, diff_stride);

        vp9_highbd_quantize_fp(coeff, 256, p, qcoeff, dqcoeff, pd->dequant, eob,

                               scan_order);

        break;

      case TX_8X8:

        vpx_highbd_fdct8x8(src_diff, coeff, diff_stride);

        vp9_highbd_quantize_fp(coeff, 64, p, qcoeff, dqcoeff, pd->dequant, eob,

                               scan_order);

        break;

      default:

        assert(tx_size == TX_4X4);

        x->fwd_txfm4x4(src_diff, coeff, diff_stride);

        vp9_highbd_quantize_fp(coeff, 16, p, qcoeff, dqcoeff, pd->dequant, eob,

                               scan_order);

        break;

    }

    return;

  }

#endif  // CONFIG_VP9_HIGHBITDEPTH

  switch (tx_size) {

    case TX_32X32:

      fdct32x32(x->use_lp32x32fdct, src_diff, coeff, diff_stride);

      vp9_quantize_fp_32x32(coeff, 1024, p, qcoeff, dqcoeff, pd->dequant, eob,

                            scan_order);

      break;

    case TX_16X16:

      vpx_fdct16x16(src_diff, coeff, diff_stride);

      vp9_quantize_fp(coeff, 256, p, qcoeff, dqcoeff, pd->dequant, eob,

                      scan_order);

      break;

    case TX_8X8:

      vpx_fdct8x8(src_diff, coeff, diff_stride);

      vp9_quantize_fp(coeff, 64, p, qcoeff, dqcoeff, pd->dequant, eob,

                      scan_order);

      break;

    default:

      assert(tx_size == TX_4X4);

      x->fwd_txfm4x4(src_diff, coeff, diff_stride);

      vp9_quantize_fp(coeff, 16, p, qcoeff, dqcoeff, pd->dequant, eob,

                      scan_order);

      break;

  }

}

void vp9_xform_quant_dc(MACROBLOCK *x, int plane, int block, int row, int col,

                        BLOCK_SIZE plane_bsize, TX_SIZE tx_size) {

  MACROBLOCKD *const xd = &x->e_mbd;

  const struct macroblock_plane *const p = &x->plane[plane];

  const struct macroblockd_plane *const pd = &xd->plane[plane];

  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;

  src_diff = &p->src_diff[4 * (row * diff_stride + col)];

  // skip block condition should be handled before this is called.

  assert(!x->skip_block);

#if CONFIG_VP9_HIGHBITDEPTH

  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {

    switch (tx_size) {

      case TX_32X32:

        vpx_highbd_fdct32x32_1(src_diff, coeff, diff_stride);

        vpx_highbd_quantize_dc_32x32(coeff, p->round, p->quant_fp[0], qcoeff,

                                     dqcoeff, pd->dequant[0], eob);

        break;

      case TX_16X16:

        vpx_highbd_fdct16x16_1(src_diff, coeff, diff_stride);

        vpx_highbd_quantize_dc(coeff, 256, p->round, p->quant_fp[0], qcoeff,

                               dqcoeff, pd->dequant[0], eob);

        break;

      case TX_8X8:

        vpx_highbd_fdct8x8_1(src_diff, coeff, diff_stride);

        vpx_highbd_quantize_dc(coeff, 64, p->round, p->quant_fp[0], qcoeff,

                               dqcoeff, pd->dequant[0], eob);

        break;

      default:

        assert(tx_size == TX_4X4);

        x->fwd_txfm4x4(src_diff, coeff, diff_stride);

        vpx_highbd_quantize_dc(coeff, 16, p->round, p->quant_fp[0], qcoeff,

                               dqcoeff, pd->dequant[0], eob);

        break;

    }

    return;

  }

#endif  // CONFIG_VP9_HIGHBITDEPTH

  switch (tx_size) {

    case TX_32X32:

      vpx_fdct32x32_1(src_diff, coeff, diff_stride);

      vpx_quantize_dc_32x32(coeff, p->round, p->quant_fp[0], qcoeff, dqcoeff,

                            pd->dequant[0], eob);

      break;

    case TX_16X16:

      vpx_fdct16x16_1(src_diff, coeff, diff_stride);

      vpx_quantize_dc(coeff, 256, p->round, p->quant_fp[0], qcoeff, dqcoeff,

                      pd->dequant[0], eob);

      break;

    case TX_8X8:

      vpx_fdct8x8_1(src_diff, coeff, diff_stride);

      vpx_quantize_dc(coeff, 64, p->round, p->quant_fp[0], qcoeff, dqcoeff,

                      pd->dequant[0], eob);

      break;

    default:

      assert(tx_size == TX_4X4);

      x->fwd_txfm4x4(src_diff, coeff, diff_stride);

      vpx_quantize_dc(coeff, 16, p->round, p->quant_fp[0], qcoeff, dqcoeff,

                      pd->dequant[0], eob);

      break;

  }

}

void vp9_xform_quant(MACROBLOCK *x, int plane, int block, int row, int col,

                     BLOCK_SIZE plane_bsize, TX_SIZE tx_size) {

  MACROBLOCKD *const xd = &x->e_mbd;

  const struct macroblock_plane *const p = &x->plane[plane];

  const struct macroblockd_plane *const pd = &xd->plane[plane];

  const ScanOrder *const scan_order = &vp9_default_scan_orders[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;

  src_diff = &p->src_diff[4 * (row * diff_stride + col)];

  // skip block condition should be handled before this is called.

  assert(!x->skip_block);

#if CONFIG_VP9_HIGHBITDEPTH

  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {

    switch (tx_size) {

      case TX_32X32:

        highbd_fdct32x32(x->use_lp32x32fdct, src_diff, coeff, diff_stride);

        vpx_highbd_quantize_b_32x32(coeff, p, qcoeff, dqcoeff, pd->dequant, eob,

                                    scan_order);

        break;

      case TX_16X16:

        vpx_highbd_fdct16x16(src_diff, coeff, diff_stride);

        vpx_highbd_quantize_b(coeff, 256, p, qcoeff, dqcoeff, pd->dequant, eob,

                              scan_order);

        break;

      case TX_8X8:

        vpx_highbd_fdct8x8(src_diff, coeff, diff_stride);

        vpx_highbd_quantize_b(coeff, 64, p, qcoeff, dqcoeff, pd->dequant, eob,

                              scan_order);

        break;

      default:

        assert(tx_size == TX_4X4);

        x->fwd_txfm4x4(src_diff, coeff, diff_stride);

        vpx_highbd_quantize_b(coeff, 16, p, qcoeff, dqcoeff, pd->dequant, eob,

                              scan_order);

        break;

    }

    return;

  }

#endif  // CONFIG_VP9_HIGHBITDEPTH

  switch (tx_size) {

    case TX_32X32:

      fdct32x32(x->use_lp32x32fdct, src_diff, coeff, diff_stride);

      vpx_quantize_b_32x32(coeff, p, qcoeff, dqcoeff, pd->dequant, eob,

                           scan_order);

      break;

    case TX_16X16:

      vpx_fdct16x16(src_diff, coeff, diff_stride);

      vpx_quantize_b(coeff, 256, p, qcoeff, dqcoeff, pd->dequant, eob,

                     scan_order);

      break;

    case TX_8X8:

      vpx_fdct8x8(src_diff, coeff, diff_stride);

      vpx_quantize_b(coeff, 64, p, qcoeff, dqcoeff, pd->dequant, eob,

                     scan_order);

      break;

    default:

      assert(tx_size == TX_4X4);

      x->fwd_txfm4x4(src_diff, coeff, diff_stride);

      vpx_quantize_b(coeff, 16, p, qcoeff, dqcoeff, pd->dequant, eob,

                     scan_order);

      break;

  }

}

static void encode_block(int plane, int block, int row, int col,

                         BLOCK_SIZE plane_bsize, TX_SIZE tx_size, void *arg) {

  struct encode_b_args *const args = arg;

#if CONFIG_MISMATCH_DEBUG

  int mi_row = args->mi_row;

  int mi_col = args->mi_col;

  int output_enabled = args->output_enabled;

#endif

  MACROBLOCK *const x = args->x;

  MACROBLOCKD *const xd = &x->e_mbd;

  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;

  dst = &pd->dst.buf[4 * row * pd->dst.stride + 4 * col];

  a = &args->ta[col];

  l = &args->tl[row];

  // TODO(jingning): per transformed block zero forcing only enabled for

  // luma component. will integrate chroma components as well.

  if (x->zcoeff_blk[tx_size][block] && plane == 0) {

    p->eobs[block] = 0;

    *a = *l = 0;

#if CONFIG_MISMATCH_DEBUG

    goto encode_block_end;

#else

    return;

#endif

  }

  if (!x->skip_recode) {

    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;

#if CONFIG_MISMATCH_DEBUG

        goto encode_block_end;

#else

        return;

#endif

      } else {

        vp9_xform_quant_fp(x, plane, block, row, col, plane_bsize, tx_size);

      }

    } 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

          vp9_xform_quant(x, plane, block, row, col, plane_bsize, tx_size);

        } else if (x->skip_txfm[txfm_blk_index] == SKIP_TXFM_AC_ONLY) {

          // fast path forward transform and quantization

          vp9_xform_quant_dc(x, plane, block, row, col, plane_bsize, tx_size);

        } else {

          // skip forward transform

          p->eobs[block] = 0;

          *a = *l = 0;

#if CONFIG_MISMATCH_DEBUG

          goto encode_block_end;

#else

          return;

#endif

        }

      } else {

        vp9_xform_quant(x, plane, block, row, col, plane_bsize, tx_size);

      }

    }

  }

  if (x->optimize && (!x->skip_recode || !x->skip_optimize)) {

    const int ctx = combine_entropy_contexts(*a, *l);

    *a = *l = vp9_optimize_b(x, plane, block, tx_size, ctx) > 0;

  } else {

    *a = *l = p->eobs[block] > 0;

  }

  if (p->eobs[block]) *(args->skip) = 0;

  if (x->skip_encode || p->eobs[block] == 0) {

#if CONFIG_MISMATCH_DEBUG

    goto encode_block_end;

#else

    return;

#endif

  }

#if CONFIG_VP9_HIGHBITDEPTH

  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {

    uint16_t *const dst16 = CONVERT_TO_SHORTPTR(dst);

    switch (tx_size) {

      case TX_32X32:

        vp9_highbd_idct32x32_add(dqcoeff, dst16, pd->dst.stride, p->eobs[block],

                                 xd->bd);

        break;

      case TX_16X16:

        vp9_highbd_idct16x16_add(dqcoeff, dst16, pd->dst.stride, p->eobs[block],

                                 xd->bd);

        break;

      case TX_8X8:

        vp9_highbd_idct8x8_add(dqcoeff, dst16, pd->dst.stride, p->eobs[block],

                               xd->bd);

        break;

      default:

        assert(tx_size == TX_4X4);

        // this is like vp9_short_idct4x4 but has a special case around eob<=1

        // which is significant (not just an optimization) for the lossless

        // case.

        x->highbd_inv_txfm_add(dqcoeff, dst16, pd->dst.stride, p->eobs[block],

                               xd->bd);

        break;

    }

#if CONFIG_MISMATCH_DEBUG

    goto encode_block_end;

#else

    return;

#endif

  }

#endif  // CONFIG_VP9_HIGHBITDEPTH

  switch (tx_size) {

    case TX_32X32:

      vp9_idct32x32_add(dqcoeff, dst, pd->dst.stride, p->eobs[block]);

      break;

    case TX_16X16:

      vp9_idct16x16_add(dqcoeff, dst, pd->dst.stride, p->eobs[block]);

      break;

    case TX_8X8:

      vp9_idct8x8_add(dqcoeff, dst, pd->dst.stride, p->eobs[block]);

      break;

    default:

      assert(tx_size == TX_4X4);

      // this is like vp9_short_idct4x4 but has a special case around eob<=1

      // which is significant (not just an optimization) for the lossless

      // case.

      x->inv_txfm_add(dqcoeff, dst, pd->dst.stride, p->eobs[block]);

      break;

  }

#if CONFIG_MISMATCH_DEBUG

encode_block_end:

  if (output_enabled) {

    int pixel_c, pixel_r;

    int blk_w = 1 << (tx_size + TX_UNIT_SIZE_LOG2);

    int blk_h = 1 << (tx_size + TX_UNIT_SIZE_LOG2);

    mi_to_pixel_loc(&pixel_c, &pixel_r, mi_col, mi_row, col, row,

                    pd->subsampling_x, pd->subsampling_y);

    mismatch_record_block_tx(dst, pd->dst.stride, plane, pixel_c, pixel_r,

                             blk_w, blk_h,

                             xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH);

  }

#endif

}

static void encode_block_pass1(int plane, int block, int row, int col,

                               BLOCK_SIZE plane_bsize, TX_SIZE tx_size,

                               void *arg) {

  MACROBLOCK *const x = (MACROBLOCK *)arg;

  MACROBLOCKD *const xd = &x->e_mbd;

  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;

  dst = &pd->dst.buf[4 * row * pd->dst.stride + 4 * col];

  vp9_xform_quant(x, plane, block, row, col, plane_bsize, tx_size);

  if (p->eobs[block] > 0) {

#if CONFIG_VP9_HIGHBITDEPTH

    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {

      x->highbd_inv_txfm_add(dqcoeff, CONVERT_TO_SHORTPTR(dst), pd->dst.stride,

                             p->eobs[block], xd->bd);

      return;

    }

#endif  // CONFIG_VP9_HIGHBITDEPTH

    x->inv_txfm_add(dqcoeff, dst, pd->dst.stride, p->eobs[block]);

  }

}

void vp9_encode_sby_pass1(MACROBLOCK *x, BLOCK_SIZE bsize) {

  vp9_subtract_plane(x, bsize, 0);

  vp9_foreach_transformed_block_in_plane(&x->e_mbd, bsize, 0,

                                         encode_block_pass1, x);

}

void vp9_encode_sb(MACROBLOCK *x, BLOCK_SIZE bsize, int mi_row, int mi_col,

                   int output_enabled) {

  MACROBLOCKD *const xd = &x->e_mbd;

  struct optimize_ctx ctx;

  MODE_INFO *mi = xd->mi[0];

  int plane;

#if CONFIG_MISMATCH_DEBUG

  struct encode_b_args arg = { x,

                               1,     // enable_trellis_opt

                               0.0,   // trellis_opt_thresh

                               NULL,  // &sse_calc_done

                               NULL,  // &sse

                               NULL,  // above entropy context

                               NULL,  // left entropy context

                               &mi->skip, mi_row, mi_col, output_enabled };

#else

  struct encode_b_args arg = { x,

                               1,     // enable_trellis_opt

                               0.0,   // trellis_opt_thresh

                               NULL,  // &sse_calc_done

                               NULL,  // &sse

                               NULL,  // above entropy context

                               NULL,  // left entropy context

                               &mi->skip };

  (void)mi_row;

  (void)mi_col;

  (void)output_enabled;

#endif

  mi->skip = 1;

  if (x->skip) return;

  for (plane = 0; plane < MAX_MB_PLANE; ++plane) {

    if (!x->skip_recode) vp9_subtract_plane(x, bsize, plane);

    if (x->optimize && (!x->skip_recode || !x->skip_optimize)) {

      const struct macroblockd_plane *const pd = &xd->plane[plane];

      const TX_SIZE tx_size = plane ? get_uv_tx_size(mi, pd) : mi->tx_size;

      vp9_get_entropy_contexts(bsize, tx_size, pd, ctx.ta[plane],

                               ctx.tl[plane]);

      arg.enable_trellis_opt = 1;

    } else {

      arg.enable_trellis_opt = 0;

    }

    arg.ta = ctx.ta[plane];

    arg.tl = ctx.tl[plane];

    vp9_foreach_transformed_block_in_plane(xd, bsize, plane, encode_block,

                                           &arg);

  }

}

void vp9_encode_block_intra(int plane, int block, int row, int col,

                            BLOCK_SIZE plane_bsize, TX_SIZE tx_size,

                            void *arg) {

  struct encode_b_args *const args = arg;

  MACROBLOCK *const x = args->x;

  MACROBLOCKD *const xd = &x->e_mbd;

  MODE_INFO *mi = xd->mi[0];

  struct macroblock_plane *const p = &x->plane[plane];

  struct macroblockd_plane *const pd = &xd->plane[plane];

  tran_low_t *coeff = BLOCK_OFFSET(p->coeff, block);

  tran_low_t *qcoeff = BLOCK_OFFSET(p->qcoeff, block);

  tran_low_t *dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);

  const ScanOrder *scan_order;

  TX_TYPE tx_type = DCT_DCT;

  PREDICTION_MODE mode;

  const int bwl = b_width_log2_lookup[plane_bsize];

  const int diff_stride = 4 * (1 << bwl);

  uint8_t *src, *dst;

  int16_t *src_diff;

  uint16_t *eob = &p->eobs[block];

  const int src_stride = p->src.stride;

  const int dst_stride = pd->dst.stride;

  int enable_trellis_opt = !x->skip_recode;

  ENTROPY_CONTEXT *a = NULL;

  ENTROPY_CONTEXT *l = NULL;

  int entropy_ctx = 0;

  dst = &pd->dst.buf[4 * (row * dst_stride + col)];

  src = &p->src.buf[4 * (row * src_stride + col)];

  src_diff = &p->src_diff[4 * (row * diff_stride + col)];

  if (tx_size == TX_4X4) {

    tx_type = get_tx_type_4x4(get_plane_type(plane), xd, block);

    scan_order = &vp9_scan_orders[TX_4X4][tx_type];

    mode = plane == 0 ? get_y_mode(xd->mi[0], block) : mi->uv_mode;

  } else {

    mode = plane == 0 ? mi->mode : mi->uv_mode;

    if (tx_size == TX_32X32) {

      scan_order = &vp9_default_scan_orders[TX_32X32];

    } else {

      tx_type = get_tx_type(get_plane_type(plane), xd);

      scan_order = &vp9_scan_orders[tx_size][tx_type];

    }

  }

  vp9_predict_intra_block(

      xd, bwl, tx_size, mode, (x->skip_encode || x->fp_src_pred) ? src : dst,

      (x->skip_encode || x->fp_src_pred) ? src_stride : dst_stride, dst,

      dst_stride, col, row, plane);

  // skip block condition should be handled before this is called.

  assert(!x->skip_block);

  if (!x->skip_recode) {

    const int tx_size_in_pixels = (1 << tx_size) << 2;

#if CONFIG_VP9_HIGHBITDEPTH

    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {

      vpx_highbd_subtract_block(tx_size_in_pixels, tx_size_in_pixels, src_diff,

                                diff_stride, src, src_stride, dst, dst_stride,

                                xd->bd);

    } else {

      vpx_subtract_block(tx_size_in_pixels, tx_size_in_pixels, src_diff,

                         diff_stride, src, src_stride, dst, dst_stride);

    }

#else

    vpx_subtract_block(tx_size_in_pixels, tx_size_in_pixels, src_diff,

                       diff_stride, src, src_stride, dst, dst_stride);

#endif

    enable_trellis_opt = do_trellis_opt(pd, src_diff, diff_stride, row, col,

                                        plane_bsize, tx_size, args);

  }

  if (enable_trellis_opt) {

    a = &args->ta[col];

    l = &args->tl[row];

    entropy_ctx = combine_entropy_contexts(*a, *l);

  }

#if CONFIG_VP9_HIGHBITDEPTH

  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {

    uint16_t *const dst16 = CONVERT_TO_SHORTPTR(dst);

    switch (tx_size) {

      case TX_32X32:

        if (!x->skip_recode) {

          highbd_fdct32x32(x->use_lp32x32fdct, src_diff, coeff, diff_stride);

          vpx_highbd_quantize_b_32x32(coeff, p, qcoeff, dqcoeff, pd->dequant,

                                      eob, scan_order);

        }

        if (enable_trellis_opt) {

          *a = *l = vp9_optimize_b(x, plane, block, tx_size, entropy_ctx) > 0;

        }

        if (!x->skip_encode && *eob) {

          vp9_highbd_idct32x32_add(dqcoeff, dst16, dst_stride, *eob, xd->bd);

        }

        break;

      case TX_16X16:

        if (!x->skip_recode) {

          if (tx_type == DCT_DCT)

            vpx_highbd_fdct16x16(src_diff, coeff, diff_stride);

          else

            vp9_highbd_fht16x16(src_diff, coeff, diff_stride, tx_type);

          vpx_highbd_quantize_b(coeff, 256, p, qcoeff, dqcoeff, pd->dequant,

                                eob, scan_order);

        }

        if (enable_trellis_opt) {

          *a = *l = vp9_optimize_b(x, plane, block, tx_size, entropy_ctx) > 0;

        }

        if (!x->skip_encode && *eob) {