Merge branch 'master' into Basilisk-releasev2018.11.04

1 files changed, 2062 insertions, 0 deletions

diff --git a/third_party/aom/av1/encoder/encodetxb.c b/third_party/aom/av1/encoder/encodetxb.c
new file mode 100644
index 000000000..5a31d93d7
--- /dev/null
+++ b/third_party/aom/av1/encoder/encodetxb.c
@@ -0,0 +1,2062 @@
+/*
+ * Copyright (c) 2017, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include "av1/encoder/encodetxb.h"
+
+#include "aom_ports/mem.h"
+#include "av1/common/blockd.h"
+#include "av1/common/idct.h"
+#include "av1/common/pred_common.h"
+#include "av1/common/scan.h"
+#include "av1/encoder/bitstream.h"
+#include "av1/encoder/cost.h"
+#include "av1/encoder/encodeframe.h"
+#include "av1/encoder/hash.h"
+#include "av1/encoder/rdopt.h"
+#include "av1/encoder/tokenize.h"
+
+static int hbt_needs_init = 1;
+static CRC32C crc_calculator;
+static const int HBT_EOB = 16;            // also the length in opt_qcoeff
+static const int HBT_TABLE_SIZE = 65536;  // 16 bit: holds 65536 'arrays'
+static const int HBT_ARRAY_LENGTH = 256;  // 8 bit: 256 entries
+// If removed in hbt_create_hashes or increased beyond int8_t, widen deltas type
+static const int HBT_KICKOUT = 3;
+
+typedef struct OptTxbQcoeff {
+  // Use larger type if larger/no kickout value is used in hbt_create_hashes
+  int8_t deltas[16];
+  uint32_t hbt_qc_hash;
+  uint32_t hbt_ctx_hash;
+  int init;
+  int rate_cost;
+} OptTxbQcoeff;
+
+OptTxbQcoeff *hbt_hash_table;
+
+typedef struct LevelDownStats {
+  int update;
+  tran_low_t low_qc;
+  tran_low_t low_dqc;
+  int64_t dist0;
+  int rate;
+  int rate_low;
+  int64_t dist;
+  int64_t dist_low;
+  int64_t rd;
+  int64_t rd_low;
+  int64_t nz_rd;
+  int64_t rd_diff;
+  int cost_diff;
+  int64_t dist_diff;
+  int new_eob;
+} LevelDownStats;
+
+void av1_alloc_txb_buf(AV1_COMP *cpi) {
+  AV1_COMMON *cm = &cpi->common;
+  int size = ((cm->mi_rows >> cm->seq_params.mib_size_log2) + 1) *
+             ((cm->mi_cols >> cm->seq_params.mib_size_log2) + 1);
+
+  av1_free_txb_buf(cpi);
+  // TODO(jingning): This should be further reduced.
+  CHECK_MEM_ERROR(cm, cpi->coeff_buffer_base,
+                  aom_memalign(32, sizeof(*cpi->coeff_buffer_base) * size));
+}
+
+void av1_free_txb_buf(AV1_COMP *cpi) { aom_free(cpi->coeff_buffer_base); }
+
+void av1_set_coeff_buffer(const AV1_COMP *const cpi, MACROBLOCK *const x,
+                          int mi_row, int mi_col) {
+  const AV1_COMMON *const cm = &cpi->common;
+  const int num_planes = av1_num_planes(cm);
+  int mib_size_log2 = cm->seq_params.mib_size_log2;
+  int stride = (cm->mi_cols >> mib_size_log2) + 1;
+  int offset = (mi_row >> mib_size_log2) * stride + (mi_col >> mib_size_log2);
+  CB_COEFF_BUFFER *coeff_buf = &cpi->coeff_buffer_base[offset];
+  const int txb_offset = x->cb_offset / (TX_SIZE_W_MIN * TX_SIZE_H_MIN);
+  assert(x->cb_offset < (1 << num_pels_log2_lookup[cm->seq_params.sb_size]));
+  for (int plane = 0; plane < num_planes; ++plane) {
+    x->mbmi_ext->tcoeff[plane] = coeff_buf->tcoeff[plane] + x->cb_offset;
+    x->mbmi_ext->eobs[plane] = coeff_buf->eobs[plane] + txb_offset;
+    x->mbmi_ext->txb_skip_ctx[plane] =
+        coeff_buf->txb_skip_ctx[plane] + txb_offset;
+    x->mbmi_ext->dc_sign_ctx[plane] =
+        coeff_buf->dc_sign_ctx[plane] + txb_offset;
+  }
+}
+
+static void write_golomb(aom_writer *w, int level) {
+  int x = level + 1;
+  int i = x;
+  int length = 0;
+
+  while (i) {
+    i >>= 1;
+    ++length;
+  }
+  assert(length > 0);
+
+  for (i = 0; i < length - 1; ++i) aom_write_bit(w, 0);
+
+  for (i = length - 1; i >= 0; --i) aom_write_bit(w, (x >> i) & 0x01);
+}
+
+static INLINE tran_low_t get_lower_coeff(tran_low_t qc) {
+  if (qc == 0) {
+    return 0;
+  }
+  return qc > 0 ? qc - 1 : qc + 1;
+}
+
+static INLINE tran_low_t qcoeff_to_dqcoeff(tran_low_t qc, int coeff_idx,
+                                           int dqv, int shift,
+                                           const qm_val_t *iqmatrix) {
+  int sign = qc < 0 ? -1 : 1;
+  if (iqmatrix != NULL)
+    dqv =
+        ((iqmatrix[coeff_idx] * dqv) + (1 << (AOM_QM_BITS - 1))) >> AOM_QM_BITS;
+  return sign * ((abs(qc) * dqv) >> shift);
+}
+
+static INLINE int64_t get_coeff_dist(tran_low_t tcoeff, tran_low_t dqcoeff,
+                                     int shift) {
+  const int64_t diff = (tcoeff - dqcoeff) * (1 << shift);
+  const int64_t error = diff * diff;
+  return error;
+}
+
+static const int8_t eob_to_pos_small[33] = {
+  0, 1, 2,                                        // 0-2
+  3, 3,                                           // 3-4
+  4, 4, 4, 4,                                     // 5-8
+  5, 5, 5, 5, 5, 5, 5, 5,                         // 9-16
+  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6  // 17-32
+};
+
+static const int8_t eob_to_pos_large[17] = {
+  6,                               // place holder
+  7,                               // 33-64
+  8,  8,                           // 65-128
+  9,  9,  9,  9,                   // 129-256
+  10, 10, 10, 10, 10, 10, 10, 10,  // 257-512
+  11                               // 513-
+};
+
+static INLINE int get_eob_pos_token(const int eob, int *const extra) {
+  int t;
+
+  if (eob < 33) {
+    t = eob_to_pos_small[eob];
+  } else {
+    const int e = AOMMIN((eob - 1) >> 5, 16);
+    t = eob_to_pos_large[e];
+  }
+
+  *extra = eob - k_eob_group_start[t];
+
+  return t;
+}
+
+#if CONFIG_ENTROPY_STATS
+void av1_update_eob_context(int cdf_idx, int eob, TX_SIZE tx_size,
+                            TX_CLASS tx_class, PLANE_TYPE plane,
+                            FRAME_CONTEXT *ec_ctx, FRAME_COUNTS *counts,
+                            uint8_t allow_update_cdf) {
+#else
+void av1_update_eob_context(int eob, TX_SIZE tx_size, TX_CLASS tx_class,
+                            PLANE_TYPE plane, FRAME_CONTEXT *ec_ctx,
+                            uint8_t allow_update_cdf) {
+#endif
+  int eob_extra;
+  const int eob_pt = get_eob_pos_token(eob, &eob_extra);
+  TX_SIZE txs_ctx = get_txsize_entropy_ctx(tx_size);
+
+  const int eob_multi_size = txsize_log2_minus4[tx_size];
+  const int eob_multi_ctx = (tx_class == TX_CLASS_2D) ? 0 : 1;
+
+  switch (eob_multi_size) {
+    case 0:
+#if CONFIG_ENTROPY_STATS
+      ++counts->eob_multi16[cdf_idx][plane][eob_multi_ctx][eob_pt - 1];
+#endif
+      if (allow_update_cdf)
+        update_cdf(ec_ctx->eob_flag_cdf16[plane][eob_multi_ctx], eob_pt - 1, 5);
+      break;
+    case 1:
+#if CONFIG_ENTROPY_STATS
+      ++counts->eob_multi32[cdf_idx][plane][eob_multi_ctx][eob_pt - 1];
+#endif
+      if (allow_update_cdf)
+        update_cdf(ec_ctx->eob_flag_cdf32[plane][eob_multi_ctx], eob_pt - 1, 6);
+      break;
+    case 2:
+#if CONFIG_ENTROPY_STATS
+      ++counts->eob_multi64[cdf_idx][plane][eob_multi_ctx][eob_pt - 1];
+#endif
+      if (allow_update_cdf)
+        update_cdf(ec_ctx->eob_flag_cdf64[plane][eob_multi_ctx], eob_pt - 1, 7);
+      break;
+    case 3:
+#if CONFIG_ENTROPY_STATS
+      ++counts->eob_multi128[cdf_idx][plane][eob_multi_ctx][eob_pt - 1];
+#endif
+      if (allow_update_cdf) {
+        update_cdf(ec_ctx->eob_flag_cdf128[plane][eob_multi_ctx], eob_pt - 1,
+                   8);
+      }
+      break;
+    case 4:
+#if CONFIG_ENTROPY_STATS
+      ++counts->eob_multi256[cdf_idx][plane][eob_multi_ctx][eob_pt - 1];
+#endif
+      if (allow_update_cdf) {
+        update_cdf(ec_ctx->eob_flag_cdf256[plane][eob_multi_ctx], eob_pt - 1,
+                   9);
+      }
+      break;
+    case 5:
+#if CONFIG_ENTROPY_STATS
+      ++counts->eob_multi512[cdf_idx][plane][eob_multi_ctx][eob_pt - 1];
+#endif
+      if (allow_update_cdf) {
+        update_cdf(ec_ctx->eob_flag_cdf512[plane][eob_multi_ctx], eob_pt - 1,
+                   10);
+      }
+      break;
+    case 6:
+    default:
+#if CONFIG_ENTROPY_STATS
+      ++counts->eob_multi1024[cdf_idx][plane][eob_multi_ctx][eob_pt - 1];
+#endif
+      if (allow_update_cdf) {
+        update_cdf(ec_ctx->eob_flag_cdf1024[plane][eob_multi_ctx], eob_pt - 1,
+                   11);
+      }
+      break;
+  }
+
+  if (k_eob_offset_bits[eob_pt] > 0) {
+    int eob_ctx = eob_pt - 3;
+    int eob_shift = k_eob_offset_bits[eob_pt] - 1;
+    int bit = (eob_extra & (1 << eob_shift)) ? 1 : 0;
+#if CONFIG_ENTROPY_STATS
+    counts->eob_extra[cdf_idx][txs_ctx][plane][eob_pt][bit]++;
+#endif  // CONFIG_ENTROPY_STATS
+    if (allow_update_cdf)
+      update_cdf(ec_ctx->eob_extra_cdf[txs_ctx][plane][eob_ctx], bit, 2);
+  }
+}
+
+static int get_eob_cost(int eob, const LV_MAP_EOB_COST *txb_eob_costs,
+                        const LV_MAP_COEFF_COST *txb_costs, TX_CLASS tx_class) {
+  int eob_extra;
+  const int eob_pt = get_eob_pos_token(eob, &eob_extra);
+  int eob_cost = 0;
+  const int eob_multi_ctx = (tx_class == TX_CLASS_2D) ? 0 : 1;
+  eob_cost = txb_eob_costs->eob_cost[eob_multi_ctx][eob_pt - 1];
+
+  if (k_eob_offset_bits[eob_pt] > 0) {
+    const int eob_ctx = eob_pt - 3;
+    const int eob_shift = k_eob_offset_bits[eob_pt] - 1;
+    const int bit = (eob_extra & (1 << eob_shift)) ? 1 : 0;
+    eob_cost += txb_costs->eob_extra_cost[eob_ctx][bit];
+    const int offset_bits = k_eob_offset_bits[eob_pt];
+    if (offset_bits > 1) eob_cost += av1_cost_literal(offset_bits - 1);
+  }
+  return eob_cost;
+}
+
+static INLINE int get_sign_bit_cost(tran_low_t qc, int coeff_idx,
+                                    const int (*dc_sign_cost)[2],
+                                    int dc_sign_ctx) {
+  if (coeff_idx == 0) {
+    const int sign = (qc < 0) ? 1 : 0;
+    return dc_sign_cost[dc_sign_ctx][sign];
+  }
+  return av1_cost_literal(1);
+}
+
+static INLINE int get_br_cost(tran_low_t abs_qc, int ctx,
+                              const int *coeff_lps) {
+  const tran_low_t min_level = 1 + NUM_BASE_LEVELS;
+  const tran_low_t max_level = 1 + NUM_BASE_LEVELS + COEFF_BASE_RANGE;
+  (void)ctx;
+  if (abs_qc >= min_level) {
+    if (abs_qc >= max_level) {
+      return coeff_lps[COEFF_BASE_RANGE];  // COEFF_BASE_RANGE * cost0;
+    } else {
+      return coeff_lps[(abs_qc - min_level)];  //  * cost0 + cost1;
+    }
+  }
+  return 0;
+}
+
+static INLINE int get_golomb_cost(int abs_qc) {
+  if (abs_qc >= 1 + NUM_BASE_LEVELS + COEFF_BASE_RANGE) {
+    const int r = abs_qc - COEFF_BASE_RANGE - NUM_BASE_LEVELS;
+    const int length = get_msb(r) + 1;
+    return av1_cost_literal(2 * length - 1);
+  }
+  return 0;
+}
+
+static int get_coeff_cost(const tran_low_t qc, const int scan_idx,
+                          const int is_eob, const TxbInfo *const txb_info,
+                          const LV_MAP_COEFF_COST *const txb_costs,
+                          const int coeff_ctx, const TX_CLASS tx_class) {
+  const TXB_CTX *const txb_ctx = txb_info->txb_ctx;
+  const int is_nz = (qc != 0);
+  const tran_low_t abs_qc = abs(qc);
+  int cost = 0;
+  const int16_t *const scan = txb_info->scan_order->scan;
+  const int pos = scan[scan_idx];
+
+  if (is_eob) {
+    cost += txb_costs->base_eob_cost[coeff_ctx][AOMMIN(abs_qc, 3) - 1];
+  } else {
+    cost += txb_costs->base_cost[coeff_ctx][AOMMIN(abs_qc, 3)];
+  }
+  if (is_nz) {
+    cost += get_sign_bit_cost(qc, scan_idx, txb_costs->dc_sign_cost,
+                              txb_ctx->dc_sign_ctx);
+
+    if (abs_qc > NUM_BASE_LEVELS) {
+      const int ctx =
+          get_br_ctx(txb_info->levels, pos, txb_info->bwl, tx_class);
+      cost += get_br_cost(abs_qc, ctx, txb_costs->lps_cost[ctx]);
+      cost += get_golomb_cost(abs_qc);
+    }
+  }
+  return cost;
+}
+
+static INLINE int get_nz_map_ctx(const uint8_t *const levels,
+                                 const int coeff_idx, const int bwl,
+                                 const int height, const int scan_idx,
+                                 const int is_eob, const TX_SIZE tx_size,
+                                 const TX_CLASS tx_class) {
+  if (is_eob) {
+    if (scan_idx == 0) return 0;
+    if (scan_idx <= (height << bwl) / 8) return 1;
+    if (scan_idx <= (height << bwl) / 4) return 2;
+    return 3;
+  }
+  const int stats =
+      get_nz_mag(levels + get_padded_idx(coeff_idx, bwl), bwl, tx_class);
+  return get_nz_map_ctx_from_stats(stats, coeff_idx, bwl, tx_size, tx_class);
+}
+
+static void get_dist_cost_stats(LevelDownStats *const stats, const int scan_idx,
+                                const int is_eob,
+                                const LV_MAP_COEFF_COST *const txb_costs,
+                                const TxbInfo *const txb_info,
+                                const TX_CLASS tx_class) {
+  const int16_t *const scan = txb_info->scan_order->scan;
+  const int coeff_idx = scan[scan_idx];
+  const tran_low_t qc = txb_info->qcoeff[coeff_idx];
+  const uint8_t *const levels = txb_info->levels;
+  stats->new_eob = -1;
+  stats->update = 0;
+  stats->rd_low = 0;
+  stats->rd = 0;
+  stats->nz_rd = 0;
+  stats->dist_low = 0;
+  stats->rate_low = 0;
+  stats->low_qc = 0;
+
+  const tran_low_t tqc = txb_info->tcoeff[coeff_idx];
+  const int dqv = txb_info->dequant[coeff_idx != 0];
+  const int coeff_ctx =
+      get_nz_map_ctx(levels, coeff_idx, txb_info->bwl, txb_info->height,
+                     scan_idx, is_eob, txb_info->tx_size, tx_class);
+  const int qc_cost = get_coeff_cost(qc, scan_idx, is_eob, txb_info, txb_costs,
+                                     coeff_ctx, tx_class);
+  assert(qc != 0);
+  const tran_low_t dqc = qcoeff_to_dqcoeff(qc, coeff_idx, dqv, txb_info->shift,
+                                           txb_info->iqmatrix);
+  const int64_t dqc_dist = get_coeff_dist(tqc, dqc, txb_info->shift);
+
+  // distortion difference when coefficient is quantized to 0
+  const tran_low_t dqc0 =
+      qcoeff_to_dqcoeff(0, coeff_idx, dqv, txb_info->shift, txb_info->iqmatrix);
+
+  stats->dist0 = get_coeff_dist(tqc, dqc0, txb_info->shift);
+  stats->dist = dqc_dist - stats->dist0;
+  stats->rate = qc_cost;
+
+  stats->rd = RDCOST(txb_info->rdmult, stats->rate, stats->dist);
+
+  stats->low_qc = get_lower_coeff(qc);
+
+  if (is_eob && stats->low_qc == 0) {
+    stats->rd_low = stats->rd;  // disable selection of low_qc in this case.
+  } else {
+    if (stats->low_qc == 0) {
+      stats->dist_low = 0;
+    } else {
+      stats->low_dqc = qcoeff_to_dqcoeff(stats->low_qc, coeff_idx, dqv,
+                                         txb_info->shift, txb_info->iqmatrix);
+      const int64_t low_dqc_dist =
+          get_coeff_dist(tqc, stats->low_dqc, txb_info->shift);
+      stats->dist_low = low_dqc_dist - stats->dist0;
+    }
+    const int low_qc_cost =
+        get_coeff_cost(stats->low_qc, scan_idx, is_eob, txb_info, txb_costs,
+                       coeff_ctx, tx_class);
+    stats->rate_low = low_qc_cost;
+    stats->rd_low = RDCOST(txb_info->rdmult, stats->rate_low, stats->dist_low);
+  }
+}
+
+static void get_dist_cost_stats_with_eob(
+    LevelDownStats *const stats, const int scan_idx,
+    const LV_MAP_COEFF_COST *const txb_costs, const TxbInfo *const txb_info,
+    const TX_CLASS tx_class) {
+  const int is_eob = 0;
+  get_dist_cost_stats(stats, scan_idx, is_eob, txb_costs, txb_info, tx_class);
+
+  const int16_t *const scan = txb_info->scan_order->scan;
+  const int coeff_idx = scan[scan_idx];
+  const tran_low_t qc = txb_info->qcoeff[coeff_idx];
+  const int coeff_ctx_temp = get_nz_map_ctx(
+      txb_info->levels, coeff_idx, txb_info->bwl, txb_info->height, scan_idx, 1,
+      txb_info->tx_size, tx_class);
+  const int qc_eob_cost = get_coeff_cost(qc, scan_idx, 1, txb_info, txb_costs,
+                                         coeff_ctx_temp, tx_class);
+  int64_t rd_eob = RDCOST(txb_info->rdmult, qc_eob_cost, stats->dist);
+  if (stats->low_qc != 0) {
+    const int low_qc_eob_cost =
+        get_coeff_cost(stats->low_qc, scan_idx, 1, txb_info, txb_costs,
+                       coeff_ctx_temp, tx_class);
+    int64_t rd_eob_low =
+        RDCOST(txb_info->rdmult, low_qc_eob_cost, stats->dist_low);
+    rd_eob = (rd_eob > rd_eob_low) ? rd_eob_low : rd_eob;
+  }
+
+  stats->nz_rd = AOMMIN(stats->rd_low, stats->rd) - rd_eob;
+}
+
+static INLINE void update_qcoeff(const int coeff_idx, const tran_low_t qc,
+                                 const TxbInfo *const txb_info) {
+  txb_info->qcoeff[coeff_idx] = qc;
+  txb_info->levels[get_padded_idx(coeff_idx, txb_info->bwl)] =
+      (uint8_t)clamp(abs(qc), 0, INT8_MAX);
+}
+
+static INLINE void update_coeff(const int coeff_idx, const tran_low_t qc,
+                                const TxbInfo *const txb_info) {
+  update_qcoeff(coeff_idx, qc, txb_info);
+  const int dqv = txb_info->dequant[coeff_idx != 0];
+  txb_info->dqcoeff[coeff_idx] = qcoeff_to_dqcoeff(
+      qc, coeff_idx, dqv, txb_info->shift, txb_info->iqmatrix);
+}
+
+void av1_txb_init_levels_c(const tran_low_t *const coeff, const int width,
+                           const int height, uint8_t *const levels) {
+  const int stride = width + TX_PAD_HOR;
+  uint8_t *ls = levels;
+
+  memset(levels - TX_PAD_TOP * stride, 0,
+         sizeof(*levels) * TX_PAD_TOP * stride);
+  memset(levels + stride * height, 0,
+         sizeof(*levels) * (TX_PAD_BOTTOM * stride + TX_PAD_END));
+
+  for (int i = 0; i < height; i++) {
+    for (int j = 0; j < width; j++) {
+      *ls++ = (uint8_t)clamp(abs(coeff[i * width + j]), 0, INT8_MAX);
+    }
+    for (int j = 0; j < TX_PAD_HOR; j++) {
+      *ls++ = 0;
+    }
+  }
+}
+
+void av1_get_nz_map_contexts_c(const uint8_t *const levels,
+                               const int16_t *const scan, const uint16_t eob,
+                               const TX_SIZE tx_size, const TX_CLASS tx_class,
+                               int8_t *const coeff_contexts) {
+  const int bwl = get_txb_bwl(tx_size);
+  const int height = get_txb_high(tx_size);
+  for (int i = 0; i < eob; ++i) {
+    const int pos = scan[i];
+    coeff_contexts[pos] = get_nz_map_ctx(levels, pos, bwl, height, i,
+                                         i == eob - 1, tx_size, tx_class);
+  }
+}
+
+void av1_write_coeffs_txb(const AV1_COMMON *const cm, MACROBLOCKD *xd,
+                          aom_writer *w, int blk_row, int blk_col, int plane,
+                          TX_SIZE tx_size, const tran_low_t *tcoeff,
+                          uint16_t eob, TXB_CTX *txb_ctx) {
+  const TX_SIZE txs_ctx = get_txsize_entropy_ctx(tx_size);
+  FRAME_CONTEXT *ec_ctx = xd->tile_ctx;
+  aom_write_symbol(w, eob == 0,
+                   ec_ctx->txb_skip_cdf[txs_ctx][txb_ctx->txb_skip_ctx], 2);
+  if (eob == 0) return;
+  const PLANE_TYPE plane_type = get_plane_type(plane);
+  const TX_TYPE tx_type = av1_get_tx_type(plane_type, xd, blk_row, blk_col,
+                                          tx_size, cm->reduced_tx_set_used);
+  const TX_CLASS tx_class = tx_type_to_class[tx_type];
+  const SCAN_ORDER *const scan_order = get_scan(tx_size, tx_type);
+  const int16_t *const scan = scan_order->scan;
+  int c;
+  const int bwl = get_txb_bwl(tx_size);
+  const int width = get_txb_wide(tx_size);
+  const int height = get_txb_high(tx_size);
+
+  uint8_t levels_buf[TX_PAD_2D];
+  uint8_t *const levels = set_levels(levels_buf, width);
+  DECLARE_ALIGNED(16, int8_t, coeff_contexts[MAX_TX_SQUARE]);
+  av1_txb_init_levels(tcoeff, width, height, levels);
+
+  av1_write_tx_type(cm, xd, blk_row, blk_col, plane, tx_size, w);
+
+  int eob_extra;
+  const int eob_pt = get_eob_pos_token(eob, &eob_extra);
+  const int eob_multi_size = txsize_log2_minus4[tx_size];
+  const int eob_multi_ctx = (tx_class == TX_CLASS_2D) ? 0 : 1;
+  switch (eob_multi_size) {
+    case 0:
+      aom_write_symbol(w, eob_pt - 1,
+                       ec_ctx->eob_flag_cdf16[plane_type][eob_multi_ctx], 5);
+      break;
+    case 1:
+      aom_write_symbol(w, eob_pt - 1,
+                       ec_ctx->eob_flag_cdf32[plane_type][eob_multi_ctx], 6);
+      break;
+    case 2:
+      aom_write_symbol(w, eob_pt - 1,
+                       ec_ctx->eob_flag_cdf64[plane_type][eob_multi_ctx], 7);
+      break;
+    case 3:
+      aom_write_symbol(w, eob_pt - 1,
+                       ec_ctx->eob_flag_cdf128[plane_type][eob_multi_ctx], 8);
+      break;
+    case 4:
+      aom_write_symbol(w, eob_pt - 1,
+                       ec_ctx->eob_flag_cdf256[plane_type][eob_multi_ctx], 9);
+      break;
+    case 5:
+      aom_write_symbol(w, eob_pt - 1,
+                       ec_ctx->eob_flag_cdf512[plane_type][eob_multi_ctx], 10);
+      break;
+    default:
+      aom_write_symbol(w, eob_pt - 1,
+                       ec_ctx->eob_flag_cdf1024[plane_type][eob_multi_ctx], 11);
+      break;
+  }
+
+  if (k_eob_offset_bits[eob_pt] > 0) {
+    const int eob_ctx = eob_pt - 3;
+    int eob_shift = k_eob_offset_bits[eob_pt] - 1;
+    int bit = (eob_extra & (1 << eob_shift)) ? 1 : 0;
+    aom_write_symbol(w, bit,
+                     ec_ctx->eob_extra_cdf[txs_ctx][plane_type][eob_ctx], 2);
+    for (int i = 1; i < k_eob_offset_bits[eob_pt]; i++) {
+      eob_shift = k_eob_offset_bits[eob_pt] - 1 - i;
+      bit = (eob_extra & (1 << eob_shift)) ? 1 : 0;
+      aom_write_bit(w, bit);
+    }
+  }
+
+  av1_get_nz_map_contexts(levels, scan, eob, tx_size, tx_class, coeff_contexts);
+
+  for (c = eob - 1; c >= 0; --c) {
+    const int pos = scan[c];
+    const int coeff_ctx = coeff_contexts[pos];
+    const tran_low_t v = tcoeff[pos];
+    const tran_low_t level = abs(v);
+
+    if (c == eob - 1) {
+      aom_write_symbol(
+          w, AOMMIN(level, 3) - 1,
+          ec_ctx->coeff_base_eob_cdf[txs_ctx][plane_type][coeff_ctx], 3);
+    } else {
+      aom_write_symbol(w, AOMMIN(level, 3),
+                       ec_ctx->coeff_base_cdf[txs_ctx][plane_type][coeff_ctx],
+                       4);
+    }
+    if (level > NUM_BASE_LEVELS) {
+      // level is above 1.
+      const int base_range = level - 1 - NUM_BASE_LEVELS;
+      const int br_ctx = get_br_ctx(levels, pos, bwl, tx_class);
+      for (int idx = 0; idx < COEFF_BASE_RANGE; idx += BR_CDF_SIZE - 1) {
+        const int k = AOMMIN(base_range - idx, BR_CDF_SIZE - 1);
+        aom_write_symbol(
+            w, k,
+            ec_ctx->coeff_br_cdf[AOMMIN(txs_ctx, TX_32X32)][plane_type][br_ctx],
+            BR_CDF_SIZE);
+        if (k < BR_CDF_SIZE - 1) break;
+      }
+    }
+  }
+
+  // Loop to code all signs in the transform block,
+  // starting with the sign of DC (if applicable)
+  for (c = 0; c < eob; ++c) {
+    const tran_low_t v = tcoeff[scan[c]];
+    const tran_low_t level = abs(v);
+    const int sign = (v < 0) ? 1 : 0;
+    if (level) {
+      if (c == 0) {
+        aom_write_symbol(
+            w, sign, ec_ctx->dc_sign_cdf[plane_type][txb_ctx->dc_sign_ctx], 2);
+      } else {
+        aom_write_bit(w, sign);
+      }
+      if (level > COEFF_BASE_RANGE + NUM_BASE_LEVELS)
+        write_golomb(w, level - COEFF_BASE_RANGE - 1 - NUM_BASE_LEVELS);
+    }
+  }
+}
+
+typedef struct encode_txb_args {
+  const AV1_COMMON *cm;
+  MACROBLOCK *x;
+  aom_writer *w;
+} ENCODE_TXB_ARGS;
+
+static void write_coeffs_txb_wrap(const AV1_COMMON *cm, MACROBLOCK *x,
+                                  aom_writer *w, int plane, int block,
+                                  int blk_row, int blk_col, TX_SIZE tx_size) {
+  MACROBLOCKD *xd = &x->e_mbd;
+  tran_low_t *tcoeff = BLOCK_OFFSET(x->mbmi_ext->tcoeff[plane], block);
+  uint16_t eob = x->mbmi_ext->eobs[plane][block];
+  TXB_CTX txb_ctx = { x->mbmi_ext->txb_skip_ctx[plane][block],
+                      x->mbmi_ext->dc_sign_ctx[plane][block] };
+  av1_write_coeffs_txb(cm, xd, w, blk_row, blk_col, plane, tx_size, tcoeff, eob,
+                       &txb_ctx);
+}
+
+void av1_write_coeffs_mb(const AV1_COMMON *const cm, MACROBLOCK *x, int mi_row,
+                         int mi_col, aom_writer *w, BLOCK_SIZE bsize) {
+  MACROBLOCKD *xd = &x->e_mbd;
+  const int num_planes = av1_num_planes(cm);
+  int block[MAX_MB_PLANE] = { 0 };
+  int row, col;
+  assert(bsize == get_plane_block_size(bsize, xd->plane[0].subsampling_x,
+                                       xd->plane[0].subsampling_y));
+  const int max_blocks_wide = max_block_wide(xd, bsize, 0);
+  const int max_blocks_high = max_block_high(xd, bsize, 0);
+  const BLOCK_SIZE max_unit_bsize = BLOCK_64X64;
+  int mu_blocks_wide = block_size_wide[max_unit_bsize] >> tx_size_wide_log2[0];
+  int mu_blocks_high = block_size_high[max_unit_bsize] >> tx_size_high_log2[0];
+  mu_blocks_wide = AOMMIN(max_blocks_wide, mu_blocks_wide);
+  mu_blocks_high = AOMMIN(max_blocks_high, mu_blocks_high);
+
+  for (row = 0; row < max_blocks_high; row += mu_blocks_high) {
+    for (col = 0; col < max_blocks_wide; col += mu_blocks_wide) {
+      for (int plane = 0; plane < num_planes; ++plane) {
+        const struct macroblockd_plane *const pd = &xd->plane[plane];
+        if (!is_chroma_reference(mi_row, mi_col, bsize, pd->subsampling_x,
+                                 pd->subsampling_y))
+          continue;
+        const TX_SIZE tx_size = av1_get_tx_size(plane, xd);
+        const int stepr = tx_size_high_unit[tx_size];
+        const int stepc = tx_size_wide_unit[tx_size];
+        const int step = stepr * stepc;
+
+        const int unit_height = ROUND_POWER_OF_TWO(
+            AOMMIN(mu_blocks_high + row, max_blocks_high), pd->subsampling_y);
+        const int unit_width = ROUND_POWER_OF_TWO(
+            AOMMIN(mu_blocks_wide + col, max_blocks_wide), pd->subsampling_x);
+        for (int blk_row = row >> pd->subsampling_y; blk_row < unit_height;
+             blk_row += stepr) {
+          for (int blk_col = col >> pd->subsampling_x; blk_col < unit_width;
+               blk_col += stepc) {
+            write_coeffs_txb_wrap(cm, x, w, plane, block[plane], blk_row,
+                                  blk_col, tx_size);
+            block[plane] += step;
+          }
+        }
+      }
+    }
+  }
+}
+
+// TODO(angiebird): use this function whenever it's possible
+static int get_tx_type_cost(const AV1_COMMON *cm, const MACROBLOCK *x,
+                            const MACROBLOCKD *xd, int plane, TX_SIZE tx_size,
+                            TX_TYPE tx_type) {
+  if (plane > 0) return 0;
+
+  const TX_SIZE square_tx_size = txsize_sqr_map[tx_size];
+
+  const MB_MODE_INFO *mbmi = xd->mi[0];
+  const int is_inter = is_inter_block(mbmi);
+  if (get_ext_tx_types(tx_size, is_inter, cm->reduced_tx_set_used) > 1 &&
+      !xd->lossless[xd->mi[0]->segment_id]) {
+    const int ext_tx_set =
+        get_ext_tx_set(tx_size, is_inter, cm->reduced_tx_set_used);
+    if (is_inter) {
+      if (ext_tx_set > 0)
+        return x->inter_tx_type_costs[ext_tx_set][square_tx_size][tx_type];
+    } else {
+      if (ext_tx_set > 0) {
+        PREDICTION_MODE intra_dir;
+        if (mbmi->filter_intra_mode_info.use_filter_intra)
+          intra_dir = fimode_to_intradir[mbmi->filter_intra_mode_info
+                                             .filter_intra_mode];
+        else
+          intra_dir = mbmi->mode;
+        return x->intra_tx_type_costs[ext_tx_set][square_tx_size][intra_dir]
+                                     [tx_type];
+      }
+    }
+  }
+  return 0;
+}
+
+static AOM_FORCE_INLINE int warehouse_efficients_txb(
+    const AV1_COMMON *const cm, const MACROBLOCK *x, const int plane,
+    const int block, const TX_SIZE tx_size, const TXB_CTX *const txb_ctx,
+    const struct macroblock_plane *p, const int eob,
+    const PLANE_TYPE plane_type, const LV_MAP_COEFF_COST *const coeff_costs,
+    const MACROBLOCKD *const xd, const TX_TYPE tx_type,
+    const TX_CLASS tx_class) {
+  const tran_low_t *const qcoeff = BLOCK_OFFSET(p->qcoeff, block);
+  const int txb_skip_ctx = txb_ctx->txb_skip_ctx;
+  const int bwl = get_txb_bwl(tx_size);
+  const int width = get_txb_wide(tx_size);
+  const int height = get_txb_high(tx_size);
+  const SCAN_ORDER *const scan_order = get_scan(tx_size, tx_type);
+  const int16_t *const scan = scan_order->scan;
+  uint8_t levels_buf[TX_PAD_2D];
+  uint8_t *const levels = set_levels(levels_buf, width);
+  DECLARE_ALIGNED(16, int8_t, coeff_contexts[MAX_TX_SQUARE]);
+  const int eob_multi_size = txsize_log2_minus4[tx_size];
+  const LV_MAP_EOB_COST *const eob_costs =
+      &x->eob_costs[eob_multi_size][plane_type];
+  int cost = coeff_costs->txb_skip_cost[txb_skip_ctx][0];
+
+  av1_txb_init_levels(qcoeff, width, height, levels);
+
+  cost += get_tx_type_cost(cm, x, xd, plane, tx_size, tx_type);
+
+  cost += get_eob_cost(eob, eob_costs, coeff_costs, tx_class);
+
+  av1_get_nz_map_contexts(levels, scan, eob, tx_size, tx_class, coeff_contexts);
+
+  const int(*lps_cost)[COEFF_BASE_RANGE + 1] = coeff_costs->lps_cost;
+  int c = eob - 1;
+  {
+    const int pos = scan[c];
+    const tran_low_t v = qcoeff[pos];
+    const int sign = v >> 31;
+    const int level = (v ^ sign) - sign;
+    const int coeff_ctx = coeff_contexts[pos];
+    cost += coeff_costs->base_eob_cost[coeff_ctx][AOMMIN(level, 3) - 1];
+
+    if (v) {
+      // sign bit cost
+      if (level > NUM_BASE_LEVELS) {
+        const int ctx = get_br_ctx(levels, pos, bwl, tx_class);
+        const int base_range =
+            AOMMIN(level - 1 - NUM_BASE_LEVELS, COEFF_BASE_RANGE);
+        cost += lps_cost[ctx][base_range];
+        cost += get_golomb_cost(level);
+      }
+      if (c) {
+        cost += av1_cost_literal(1);
+      } else {
+        const int sign01 = (sign ^ sign) - sign;
+        const int dc_sign_ctx = txb_ctx->dc_sign_ctx;
+        cost += coeff_costs->dc_sign_cost[dc_sign_ctx][sign01];
+        return cost;
+      }
+    }
+  }
+  const int(*base_cost)[4] = coeff_costs->base_cost;
+  for (c = eob - 2; c >= 1; --c) {
+    const int pos = scan[c];
+    const int coeff_ctx = coeff_contexts[pos];
+    const tran_low_t v = qcoeff[pos];
+    const int level = abs(v);
+    const int cost0 = base_cost[coeff_ctx][AOMMIN(level, 3)];
+    if (v) {
+      // sign bit cost
+      cost += av1_cost_literal(1);
+      if (level > NUM_BASE_LEVELS) {
+        const int ctx = get_br_ctx(levels, pos, bwl, tx_class);
+        const int base_range =
+            AOMMIN(level - 1 - NUM_BASE_LEVELS, COEFF_BASE_RANGE);
+        cost += lps_cost[ctx][base_range];
+        cost += get_golomb_cost(level);
+      }
+    }
+    cost += cost0;
+  }
+  if (c == 0) {
+    const int pos = scan[c];
+    const tran_low_t v = qcoeff[pos];
+    const int coeff_ctx = coeff_contexts[pos];
+    const int sign = v >> 31;
+    const int level = (v ^ sign) - sign;
+    cost += base_cost[coeff_ctx][AOMMIN(level, 3)];
+
+    if (v) {
+      // sign bit cost
+      const int sign01 = (sign ^ sign) - sign;
+      const int dc_sign_ctx = txb_ctx->dc_sign_ctx;
+      cost += coeff_costs->dc_sign_cost[dc_sign_ctx][sign01];
+      if (level > NUM_BASE_LEVELS) {
+        const int ctx = get_br_ctx(levels, pos, bwl, tx_class);
+        const int base_range =
+            AOMMIN(level - 1 - NUM_BASE_LEVELS, COEFF_BASE_RANGE);
+        cost += lps_cost[ctx][base_range];
+        cost += get_golomb_cost(level);
+      }
+    }
+  }
+  return cost;
+}
+
+int av1_cost_coeffs_txb(const AV1_COMMON *const cm, const MACROBLOCK *x,
+                        const int plane, const int block, const TX_SIZE tx_size,
+                        const TX_TYPE tx_type, const TXB_CTX *const txb_ctx) {
+  const struct macroblock_plane *p = &x->plane[plane];
+  const int eob = p->eobs[block];
+  const TX_SIZE txs_ctx = get_txsize_entropy_ctx(tx_size);
+  const PLANE_TYPE plane_type = get_plane_type(plane);
+  const LV_MAP_COEFF_COST *const coeff_costs =
+      &x->coeff_costs[txs_ctx][plane_type];
+  if (eob == 0) {
+    return coeff_costs->txb_skip_cost[txb_ctx->txb_skip_ctx][1];
+  }
+
+  const MACROBLOCKD *const xd = &x->e_mbd;
+  const TX_CLASS tx_class = tx_type_to_class[tx_type];
+
+#define WAREHOUSE_EFFICIENTS_TXB_CASE(tx_class_literal)                        \
+  case tx_class_literal:                                                       \
+    return warehouse_efficients_txb(cm, x, plane, block, tx_size, txb_ctx, p,  \
+                                    eob, plane_type, coeff_costs, xd, tx_type, \
+                                    tx_class_literal);
+  switch (tx_class) {
+    WAREHOUSE_EFFICIENTS_TXB_CASE(TX_CLASS_2D);
+    WAREHOUSE_EFFICIENTS_TXB_CASE(TX_CLASS_HORIZ);
+    WAREHOUSE_EFFICIENTS_TXB_CASE(TX_CLASS_VERT);
+#undef WAREHOUSE_EFFICIENTS_TXB_CASE
+    default: assert(false); return 0;
+  }
+}
+
+static int optimize_txb(TxbInfo *txb_info, const LV_MAP_COEFF_COST *txb_costs,
+                        const LV_MAP_EOB_COST *txb_eob_costs, int *rate_cost) {
+  int update = 0;
+  if (txb_info->eob == 0) return update;
+  const int16_t *const scan = txb_info->scan_order->scan;
+  // forward optimize the nz_map`
+  const int init_eob = txb_info->eob;
+  const TX_CLASS tx_class = tx_type_to_class[txb_info->tx_type];
+  const int eob_cost =
+      get_eob_cost(init_eob, txb_eob_costs, txb_costs, tx_class);
+
+  // backward optimize the level-k map
+  int accu_rate = eob_cost;
+  int64_t accu_dist = 0;
+  int64_t prev_eob_rd_cost = INT64_MAX;
+  int64_t cur_eob_rd_cost = 0;
+
+  {
+    const int si = init_eob - 1;
+    const int coeff_idx = scan[si];
+    LevelDownStats stats;
+    get_dist_cost_stats(&stats, si, si == init_eob - 1, txb_costs, txb_info,
+                        tx_class);
+    if ((stats.rd_low < stats.rd) && (stats.low_qc != 0)) {
+      update = 1;
+      update_coeff(coeff_idx, stats.low_qc, txb_info);
+      accu_rate += stats.rate_low;
+      accu_dist += stats.dist_low;
+    } else {
+      accu_rate += stats.rate;
+      accu_dist += stats.dist;
+    }
+  }
+
+  int si = init_eob - 2;
+  int8_t has_nz_tail = 0;
+  // eob is not fixed
+  for (; si >= 0 && has_nz_tail < 2; --si) {
+    assert(si != init_eob - 1);
+    const int coeff_idx = scan[si];
+    tran_low_t qc = txb_info->qcoeff[coeff_idx];
+
+    if (qc == 0) {
+      const int coeff_ctx =
+          get_lower_levels_ctx(txb_info->levels, coeff_idx, txb_info->bwl,
+                               txb_info->tx_size, tx_class);
+      accu_rate += txb_costs->base_cost[coeff_ctx][0];
+    } else {
+      LevelDownStats stats;
+      get_dist_cost_stats_with_eob(&stats, si, txb_costs, txb_info, tx_class);
+      // check if it is better to make this the last significant coefficient
+      int cur_eob_rate =
+          get_eob_cost(si + 1, txb_eob_costs, txb_costs, tx_class);
+      cur_eob_rd_cost = RDCOST(txb_info->rdmult, cur_eob_rate, 0);
+      prev_eob_rd_cost =
+          RDCOST(txb_info->rdmult, accu_rate, accu_dist) + stats.nz_rd;
+      if (cur_eob_rd_cost <= prev_eob_rd_cost) {
+        update = 1;
+        for (int j = si + 1; j < txb_info->eob; j++) {
+          const int coeff_pos_j = scan[j];
+          update_coeff(coeff_pos_j, 0, txb_info);
+        }
+        txb_info->eob = si + 1;
+
+        // rerun cost calculation due to change of eob
+        accu_rate = cur_eob_rate;
+        accu_dist = 0;
+        get_dist_cost_stats(&stats, si, 1, txb_costs, txb_info, tx_class);
+        if ((stats.rd_low < stats.rd) && (stats.low_qc != 0)) {
+          update = 1;
+          update_coeff(coeff_idx, stats.low_qc, txb_info);
+          accu_rate += stats.rate_low;
+          accu_dist += stats.dist_low;
+        } else {
+          accu_rate += stats.rate;
+          accu_dist += stats.dist;
+        }
+
+        // reset non zero tail when new eob is found
+        has_nz_tail = 0;
+      } else {
+        int bUpdCoeff = 0;
+        if (stats.rd_low < stats.rd) {
+          if ((si < txb_info->eob - 1)) {
+            bUpdCoeff = 1;
+            update = 1;
+          }
+        } else {
+          ++has_nz_tail;
+        }
+
+        if (bUpdCoeff) {
+          update_coeff(coeff_idx, stats.low_qc, txb_info);
+          accu_rate += stats.rate_low;
+          accu_dist += stats.dist_low;
+        } else {
+          accu_rate += stats.rate;
+          accu_dist += stats.dist;
+        }
+      }
+    }
+  }  // for (si)
+
+  // eob is fixed
+  for (; si >= 0; --si) {
+    assert(si != init_eob - 1);
+    const int coeff_idx = scan[si];
+    tran_low_t qc = txb_info->qcoeff[coeff_idx];
+
+    if (qc == 0) {
+      const int coeff_ctx =
+          get_lower_levels_ctx(txb_info->levels, coeff_idx, txb_info->bwl,
+                               txb_info->tx_size, tx_class);
+      accu_rate += txb_costs->base_cost[coeff_ctx][0];
+    } else {
+      LevelDownStats stats;
+      get_dist_cost_stats(&stats, si, 0, txb_costs, txb_info, tx_class);
+
+      int bUpdCoeff = 0;
+      if (stats.rd_low < stats.rd) {
+        if ((si < txb_info->eob - 1)) {
+          bUpdCoeff = 1;
+          update = 1;
+        }
+      }
+      if (bUpdCoeff) {
+        update_coeff(coeff_idx, stats.low_qc, txb_info);
+        accu_rate += stats.rate_low;
+        accu_dist += stats.dist_low;
+      } else {
+        accu_rate += stats.rate;
+        accu_dist += stats.dist;
+      }
+    }
+  }  // for (si)
+
+  int non_zero_blk_rate =
+      txb_costs->txb_skip_cost[txb_info->txb_ctx->txb_skip_ctx][0];
+  prev_eob_rd_cost =
+      RDCOST(txb_info->rdmult, accu_rate + non_zero_blk_rate, accu_dist);
+
+  int zero_blk_rate =
+      txb_costs->txb_skip_cost[txb_info->txb_ctx->txb_skip_ctx][1];
+  int64_t zero_blk_rd_cost = RDCOST(txb_info->rdmult, zero_blk_rate, 0);
+  if (zero_blk_rd_cost <= prev_eob_rd_cost) {
+    update = 1;
+    for (int j = 0; j < txb_info->eob; j++) {
+      const int coeff_pos_j = scan[j];
+      update_coeff(coeff_pos_j, 0, txb_info);
+    }
+    txb_info->eob = 0;
+  }
+
+  // record total rate cost
+  *rate_cost = zero_blk_rd_cost <= prev_eob_rd_cost
+                   ? zero_blk_rate
+                   : accu_rate + non_zero_blk_rate;
+
+  if (txb_info->eob > 0) {
+    *rate_cost += txb_info->tx_type_cost;
+  }
+
+  return update;
+}
+
+// These numbers are empirically obtained.
+static const int plane_rd_mult[REF_TYPES][PLANE_TYPES] = {
+  { 17, 13 },
+  { 16, 10 },
+};
+
+void hbt_init() {
+  hbt_hash_table =
+      aom_malloc(sizeof(OptTxbQcoeff) * HBT_TABLE_SIZE * HBT_ARRAY_LENGTH);
+  memset(hbt_hash_table, 0,
+         sizeof(OptTxbQcoeff) * HBT_TABLE_SIZE * HBT_ARRAY_LENGTH);
+  av1_crc32c_calculator_init(&crc_calculator);  // 31 bit: qc & ctx
+
+  hbt_needs_init = 0;
+}
+
+void hbt_destroy() { aom_free(hbt_hash_table); }
+
+int hbt_hash_miss(uint32_t hbt_ctx_hash, uint32_t hbt_qc_hash,
+                  TxbInfo *txb_info, const LV_MAP_COEFF_COST *txb_costs,
+                  const LV_MAP_EOB_COST *txb_eob_costs,
+                  const struct macroblock_plane *p, int block, int fast_mode,
+                  int *rate_cost) {
+  (void)fast_mode;
+  const int16_t *scan = txb_info->scan_order->scan;
+  int prev_eob = txb_info->eob;
+  assert(HBT_EOB <= 16);  // Lengthen array if allowing longer eob.
+  int32_t prev_coeff[16];
+  for (int i = 0; i < prev_eob; i++) {
+    prev_coeff[i] = txb_info->qcoeff[scan[i]];
+  }
+  for (int i = prev_eob; i < HBT_EOB; i++) {
+    prev_coeff[i] = 0;  // For compiler piece of mind.
+  }
+
+  av1_txb_init_levels(txb_info->qcoeff, txb_info->width, txb_info->height,
+                      txb_info->levels);
+
+  const int update =
+      optimize_txb(txb_info, txb_costs, txb_eob_costs, rate_cost);
+
+  // Overwrite old entry
+  uint16_t hbt_table_index = hbt_ctx_hash % HBT_TABLE_SIZE;
+  uint16_t hbt_array_index = hbt_qc_hash % HBT_ARRAY_LENGTH;
+  hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+      .rate_cost = *rate_cost;
+  hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index].init = 1;
+  hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+      .hbt_qc_hash = hbt_qc_hash;
+  hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+      .hbt_ctx_hash = hbt_ctx_hash;
+  assert(prev_eob >= txb_info->eob);  // eob can't get longer
+  for (int i = 0; i < txb_info->eob; i++) {
+    // Record how coeff changed. Convention: towards zero is negative.
+    if (txb_info->qcoeff[scan[i]] > 0)
+      hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+          .deltas[i] = txb_info->qcoeff[scan[i]] - prev_coeff[i];
+    else
+      hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+          .deltas[i] = prev_coeff[i] - txb_info->qcoeff[scan[i]];
+  }
+  for (int i = txb_info->eob; i < prev_eob; i++) {
+    // If eob got shorter, record that all after it changed to zero.
+    if (prev_coeff[i] > 0)
+      hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+          .deltas[i] = -prev_coeff[i];
+    else
+      hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+          .deltas[i] = prev_coeff[i];
+  }
+  for (int i = prev_eob; i < HBT_EOB; i++) {
+    // Record 'no change' after optimized coefficients run out.
+    hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+        .deltas[i] = 0;
+  }
+
+  if (update) {
+    p->eobs[block] = txb_info->eob;
+    p->txb_entropy_ctx[block] = av1_get_txb_entropy_context(
+        txb_info->qcoeff, txb_info->scan_order, txb_info->eob);
+  }
+  return txb_info->eob;
+}
+
+int hbt_hash_hit(uint32_t hbt_table_index, int hbt_array_index,
+                 TxbInfo *txb_info, const struct macroblock_plane *p, int block,
+                 int *rate_cost) {
+  const int16_t *scan = txb_info->scan_order->scan;
+  int new_eob = 0;
+  int update = 0;
+
+  for (int i = 0; i < txb_info->eob; i++) {
+    // Delta convention is negatives go towards zero, so only apply those ones.
+    if (hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+            .deltas[i] < 0) {
+      if (txb_info->qcoeff[scan[i]] > 0)
+        txb_info->qcoeff[scan[i]] +=
+            hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+                .deltas[i];
+      else
+        txb_info->qcoeff[scan[i]] -=
+            hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+                .deltas[i];
+
+      update = 1;
+      update_coeff(scan[i], txb_info->qcoeff[scan[i]], txb_info);
+    }
+    if (txb_info->qcoeff[scan[i]]) new_eob = i + 1;
+  }
+
+  // Rate_cost can be calculated here instead (av1_cost_coeffs_txb), but
+  // it is expensive and gives little benefit as long as qc_hash is high bit
+  *rate_cost =
+      hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+          .rate_cost;
+
+  if (update) {
+    txb_info->eob = new_eob;
+    p->eobs[block] = txb_info->eob;
+    p->txb_entropy_ctx[block] = av1_get_txb_entropy_context(
+        txb_info->qcoeff, txb_info->scan_order, txb_info->eob);
+  }
+
+  return txb_info->eob;
+}
+
+int hbt_search_match(uint32_t hbt_ctx_hash, uint32_t hbt_qc_hash,
+                     TxbInfo *txb_info, const LV_MAP_COEFF_COST *txb_costs,
+                     const LV_MAP_EOB_COST *txb_eob_costs,
+                     const struct macroblock_plane *p, int block, int fast_mode,
+                     int *rate_cost) {
+  // Check for qcoeff match
+  int hbt_array_index = hbt_qc_hash % HBT_ARRAY_LENGTH;
+  int hbt_table_index = hbt_ctx_hash % HBT_TABLE_SIZE;
+
+  if (hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+              .hbt_qc_hash == hbt_qc_hash &&
+      hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+              .hbt_ctx_hash == hbt_ctx_hash &&
+      hbt_hash_table[hbt_table_index * HBT_ARRAY_LENGTH + hbt_array_index]
+          .init) {
+    return hbt_hash_hit(hbt_table_index, hbt_array_index, txb_info, p, block,
+                        rate_cost);
+  } else {
+    return hbt_hash_miss(hbt_ctx_hash, hbt_qc_hash, txb_info, txb_costs,
+                         txb_eob_costs, p, block, fast_mode, rate_cost);
+  }
+}
+
+int hbt_create_hashes(TxbInfo *txb_info, const LV_MAP_COEFF_COST *txb_costs,
+                      const LV_MAP_EOB_COST *txb_eob_costs,
+                      const struct macroblock_plane *p, int block,
+                      int fast_mode, int *rate_cost) {
+  // Initialize hash table if needed.
+  if (hbt_needs_init) {
+    hbt_init();
+  }
+
+  //// Hash creation
+  uint8_t txb_hash_data[256];  // Asserts below to ensure enough space.
+  const int16_t *scan = txb_info->scan_order->scan;
+  uint8_t chunk = 0;
+  int hash_data_index = 0;
+
+  // Make qc_hash.
+  int packing_index = 0;  // needed for packing.
+  for (int i = 0; i < txb_info->eob; i++) {
+    tran_low_t prechunk = txb_info->qcoeff[scan[i]];
+
+    // Softening: Improves speed. Aligns with signed deltas.
+    if (prechunk < 0) prechunk *= -1;
+
+    // Early kick out: Don't apply feature if there are large coeffs:
+    // If this kickout value is removed or raised beyond int8_t,
+    // widen deltas type in OptTxbQcoeff struct.
+    assert((int8_t)HBT_KICKOUT == HBT_KICKOUT);  // If not, widen types.
+    if (prechunk > HBT_KICKOUT) {
+      av1_txb_init_levels(txb_info->qcoeff, txb_info->width, txb_info->height,
+                          txb_info->levels);
+
+      const int update =
+          optimize_txb(txb_info, txb_costs, txb_eob_costs, rate_cost);
+
+      if (update) {
+        p->eobs[block] = txb_info->eob;
+        p->txb_entropy_ctx[block] = av1_get_txb_entropy_context(
+            txb_info->qcoeff, txb_info->scan_order, txb_info->eob);
+      }
+      return txb_info->eob;
+    }
+
+    // Since coeffs are 0 to 3, only 2 bits are needed: pack into bytes
+    if (packing_index == 0) txb_hash_data[hash_data_index] = 0;
+    chunk = prechunk << packing_index;
+    packing_index += 2;
+    txb_hash_data[hash_data_index] |= chunk;
+
+    // Full byte:
+    if (packing_index == 8) {
+      packing_index = 0;
+      hash_data_index++;
+    }
+  }
+  // Needed when packing_index != 0, to include final byte.
+  hash_data_index++;
+  assert(hash_data_index <= 64);
+  // 31 bit qc_hash: index to array
+  uint32_t hbt_qc_hash =
+      av1_get_crc32c_value(&crc_calculator, txb_hash_data, hash_data_index);
+
+  // Make ctx_hash.
+  hash_data_index = 0;
+  tran_low_t prechunk;
+
+  for (int i = 0; i < txb_info->eob; i++) {
+    // Save as magnitudes towards or away from zero.
+    if (txb_info->tcoeff[scan[i]] >= 0)
+      prechunk = txb_info->tcoeff[scan[i]] - txb_info->dqcoeff[scan[i]];
+    else
+      prechunk = txb_info->dqcoeff[scan[i]] - txb_info->tcoeff[scan[i]];
+
+    chunk = prechunk & 0xff;
+    txb_hash_data[hash_data_index++] = chunk;
+  }
+
+  // Extra ctx data:
+  // Include dequants.
+  txb_hash_data[hash_data_index++] = txb_info->dequant[0] & 0xff;
+  txb_hash_data[hash_data_index++] = txb_info->dequant[1] & 0xff;
+  chunk = txb_info->txb_ctx->txb_skip_ctx & 0xff;
+  txb_hash_data[hash_data_index++] = chunk;
+  chunk = txb_info->txb_ctx->dc_sign_ctx & 0xff;
+  txb_hash_data[hash_data_index++] = chunk;
+  // eob
+  chunk = txb_info->eob & 0xff;
+  txb_hash_data[hash_data_index++] = chunk;
+  // rdmult (int64)
+  chunk = txb_info->rdmult & 0xff;
+  txb_hash_data[hash_data_index++] = chunk;
+  // tx_type
+  chunk = txb_info->tx_type & 0xff;
+  txb_hash_data[hash_data_index++] = chunk;
+  // base_eob_cost
+  for (int i = 1; i < 3; i++) {  // i = 0 are softened away
+    for (int j = 0; j < SIG_COEF_CONTEXTS_EOB; j++) {
+      chunk = (txb_costs->base_eob_cost[j][i] & 0xff00) >> 8;
+      txb_hash_data[hash_data_index++] = chunk;
+    }
+  }
+  // eob_cost
+  for (int i = 0; i < 11; i++) {
+    for (int j = 0; j < 2; j++) {
+      chunk = (txb_eob_costs->eob_cost[j][i] & 0xff00) >> 8;
+      txb_hash_data[hash_data_index++] = chunk;
+    }
+  }
+  // dc_sign_cost
+  for (int i = 0; i < 2; i++) {
+    for (int j = 0; j < DC_SIGN_CONTEXTS; j++) {
+      chunk = (txb_costs->dc_sign_cost[j][i] & 0xff00) >> 8;
+      txb_hash_data[hash_data_index++] = chunk;
+    }
+  }
+
+  assert(hash_data_index <= 256);
+  // 31 bit ctx_hash: used to index table
+  uint32_t hbt_ctx_hash =
+      av1_get_crc32c_value(&crc_calculator, txb_hash_data, hash_data_index);
+  //// End hash creation
+
+  return hbt_search_match(hbt_ctx_hash, hbt_qc_hash, txb_info, txb_costs,
+                          txb_eob_costs, p, block, fast_mode, rate_cost);
+}
+
+static AOM_FORCE_INLINE int get_coeff_cost_simple(
+    int ci, tran_low_t abs_qc, int coeff_ctx,
+    const LV_MAP_COEFF_COST *txb_costs, int bwl, TX_CLASS tx_class,
+    const uint8_t *levels) {
+  // this simple version assumes the coeff's scan_idx is not DC (scan_idx != 0)
+  // and not the last (scan_idx != eob - 1)
+  assert(ci > 0);
+  int cost = txb_costs->base_cost[coeff_ctx][AOMMIN(abs_qc, 3)];
+  if (abs_qc) {
+    cost += av1_cost_literal(1);
+    if (abs_qc > NUM_BASE_LEVELS) {
+      const int br_ctx = get_br_ctx(levels, ci, bwl, tx_class);
+      cost += get_br_cost(abs_qc, br_ctx, txb_costs->lps_cost[br_ctx]);
+      cost += get_golomb_cost(abs_qc);
+    }
+  }
+  return cost;
+}
+
+static INLINE int get_coeff_cost_general(int is_last, int ci, tran_low_t abs_qc,
+                                         int sign, int coeff_ctx,
+                                         int dc_sign_ctx,
+                                         const LV_MAP_COEFF_COST *txb_costs,
+                                         int bwl, TX_CLASS tx_class,
+                                         const uint8_t *levels) {
+  int cost = 0;
+  if (is_last) {
+    cost += txb_costs->base_eob_cost[coeff_ctx][AOMMIN(abs_qc, 3) - 1];
+  } else {
+    cost += txb_costs->base_cost[coeff_ctx][AOMMIN(abs_qc, 3)];
+  }
+  if (abs_qc != 0) {
+    if (ci == 0) {
+      cost += txb_costs->dc_sign_cost[dc_sign_ctx][sign];
+    } else {
+      cost += av1_cost_literal(1);
+    }
+    if (abs_qc > NUM_BASE_LEVELS) {
+      const int br_ctx = get_br_ctx(levels, ci, bwl, tx_class);
+      cost += get_br_cost(abs_qc, br_ctx, txb_costs->lps_cost[br_ctx]);
+      cost += get_golomb_cost(abs_qc);
+    }
+  }
+  return cost;
+}
+
+static INLINE void get_qc_dqc_low(tran_low_t abs_qc, int sign, int dqv,
+                                  int shift, tran_low_t *qc_low,
+                                  tran_low_t *dqc_low) {
+  tran_low_t abs_qc_low = abs_qc - 1;
+  *qc_low = (-sign ^ abs_qc_low) + sign;
+  assert((sign ? -abs_qc_low : abs_qc_low) == *qc_low);
+  tran_low_t abs_dqc_low = (abs_qc_low * dqv) >> shift;
+  *dqc_low = (-sign ^ abs_dqc_low) + sign;
+  assert((sign ? -abs_dqc_low : abs_dqc_low) == *dqc_low);
+}
+
+static INLINE void update_coeff_general(
+    int *accu_rate, int64_t *accu_dist, int si, int eob, TX_SIZE tx_size,
+    TX_CLASS tx_class, int bwl, int height, int64_t rdmult, int shift,
+    int dc_sign_ctx, const int16_t *dequant, const int16_t *scan,
+    const LV_MAP_COEFF_COST *txb_costs, const tran_low_t *tcoeff,
+    tran_low_t *qcoeff, tran_low_t *dqcoeff, uint8_t *levels) {
+  const int dqv = dequant[si != 0];
+  const int ci = scan[si];
+  const tran_low_t qc = qcoeff[ci];
+  const int is_last = si == (eob - 1);
+  const int coeff_ctx = get_lower_levels_ctx_general(
+      is_last, si, bwl, height, levels, ci, tx_size, tx_class);
+  if (qc == 0) {
+    *accu_rate += txb_costs->base_cost[coeff_ctx][0];
+  } else {
+    const int sign = (qc < 0) ? 1 : 0;
+    const tran_low_t abs_qc = abs(qc);
+    const tran_low_t tqc = tcoeff[ci];
+    const tran_low_t dqc = dqcoeff[ci];
+    const int64_t dist = get_coeff_dist(tqc, dqc, shift);
+    const int64_t dist0 = get_coeff_dist(tqc, 0, shift);
+    const int rate =
+        get_coeff_cost_general(is_last, ci, abs_qc, sign, coeff_ctx,
+                               dc_sign_ctx, txb_costs, bwl, tx_class, levels);
+    const int64_t rd = RDCOST(rdmult, rate, dist);
+
+    tran_low_t qc_low, dqc_low;
+    get_qc_dqc_low(abs_qc, sign, dqv, shift, &qc_low, &dqc_low);
+    const tran_low_t abs_qc_low = abs_qc - 1;
+    const int64_t dist_low = get_coeff_dist(tqc, dqc_low, shift);
+    const int rate_low =
+        get_coeff_cost_general(is_last, ci, abs_qc_low, sign, coeff_ctx,
+                               dc_sign_ctx, txb_costs, bwl, tx_class, levels);
+    const int64_t rd_low = RDCOST(rdmult, rate_low, dist_low);
+    if (rd_low < rd) {
+      qcoeff[ci] = qc_low;
+      dqcoeff[ci] = dqc_low;
+      levels[get_padded_idx(ci, bwl)] = AOMMIN(abs_qc_low, INT8_MAX);
+      *accu_rate += rate_low;
+      *accu_dist += dist_low - dist0;
+    } else {
+      *accu_rate += rate;
+      *accu_dist += dist - dist0;
+    }
+  }
+}
+
+static AOM_FORCE_INLINE void update_coeff_simple(
+    int *accu_rate, int si, int eob, TX_SIZE tx_size, TX_CLASS tx_class,
+    int bwl, int64_t rdmult, int shift, const int16_t *dequant,
+    const int16_t *scan, const LV_MAP_COEFF_COST *txb_costs,
+    const tran_low_t *tcoeff, tran_low_t *qcoeff, tran_low_t *dqcoeff,
+    uint8_t *levels) {
+  const int dqv = dequant[1];
+  (void)eob;
+  // this simple version assumes the coeff's scan_idx is not DC (scan_idx != 0)
+  // and not the last (scan_idx != eob - 1)
+  assert(si != eob - 1);
+  assert(si > 0);
+  const int ci = scan[si];
+  const tran_low_t qc = qcoeff[ci];
+  const int coeff_ctx =
+      get_lower_levels_ctx(levels, ci, bwl, tx_size, tx_class);
+  if (qc == 0) {
+    *accu_rate += txb_costs->base_cost[coeff_ctx][0];
+  } else {
+    const tran_low_t abs_qc = abs(qc);
+    const tran_low_t tqc = tcoeff[ci];
+    const tran_low_t dqc = dqcoeff[ci];
+    const int rate = get_coeff_cost_simple(ci, abs_qc, coeff_ctx, txb_costs,
+                                           bwl, tx_class, levels);
+    if (abs(dqc) < abs(tqc)) {
+      *accu_rate += rate;
+      return;
+    }
+    const int64_t dist = get_coeff_dist(tqc, dqc, shift);
+    const int64_t rd = RDCOST(rdmult, rate, dist);
+
+    const int sign = (qc < 0) ? 1 : 0;
+    tran_low_t qc_low, dqc_low;
+    get_qc_dqc_low(abs_qc, sign, dqv, shift, &qc_low, &dqc_low);
+    const tran_low_t abs_qc_low = abs_qc - 1;
+    const int64_t dist_low = get_coeff_dist(tqc, dqc_low, shift);
+    const int rate_low = get_coeff_cost_simple(
+        ci, abs_qc_low, coeff_ctx, txb_costs, bwl, tx_class, levels);
+    const int64_t rd_low = RDCOST(rdmult, rate_low, dist_low);
+    if (rd_low < rd) {
+      qcoeff[ci] = qc_low;
+      dqcoeff[ci] = dqc_low;
+      levels[get_padded_idx(ci, bwl)] = AOMMIN(abs_qc_low, INT8_MAX);
+      *accu_rate += rate_low;
+    } else {
+      *accu_rate += rate;
+    }
+  }
+}
+
+static AOM_FORCE_INLINE void update_coeff_eob(
+    int *accu_rate, int64_t *accu_dist, int *eob, int *nz_num, int *nz_ci,
+    int si, TX_SIZE tx_size, TX_CLASS tx_class, int bwl, int height,
+    int dc_sign_ctx, int64_t rdmult, int shift, const int16_t *dequant,
+    const int16_t *scan, const LV_MAP_EOB_COST *txb_eob_costs,
+    const LV_MAP_COEFF_COST *txb_costs, const tran_low_t *tcoeff,
+    tran_low_t *qcoeff, tran_low_t *dqcoeff, uint8_t *levels, int sharpness) {
+  const int dqv = dequant[si != 0];
+  assert(si != *eob - 1);
+  const int ci = scan[si];
+  const tran_low_t qc = qcoeff[ci];
+  const int coeff_ctx =
+      get_lower_levels_ctx(levels, ci, bwl, tx_size, tx_class);
+  if (qc == 0) {
+    *accu_rate += txb_costs->base_cost[coeff_ctx][0];
+  } else {
+    int lower_level = 0;
+    const tran_low_t abs_qc = abs(qc);
+    const tran_low_t tqc = tcoeff[ci];
+    const tran_low_t dqc = dqcoeff[ci];
+    const int sign = (qc < 0) ? 1 : 0;
+    const int64_t dist0 = get_coeff_dist(tqc, 0, shift);
+    int64_t dist = get_coeff_dist(tqc, dqc, shift) - dist0;
+    int rate =
+        get_coeff_cost_general(0, ci, abs_qc, sign, coeff_ctx, dc_sign_ctx,
+                               txb_costs, bwl, tx_class, levels);
+    int64_t rd = RDCOST(rdmult, *accu_rate + rate, *accu_dist + dist);
+
+    tran_low_t qc_low, dqc_low;
+    get_qc_dqc_low(abs_qc, sign, dqv, shift, &qc_low, &dqc_low);
+    const tran_low_t abs_qc_low = abs_qc - 1;
+    const int64_t dist_low = get_coeff_dist(tqc, dqc_low, shift) - dist0;
+    const int rate_low =
+        get_coeff_cost_general(0, ci, abs_qc_low, sign, coeff_ctx, dc_sign_ctx,
+                               txb_costs, bwl, tx_class, levels);
+    const int64_t rd_low =
+        RDCOST(rdmult, *accu_rate + rate_low, *accu_dist + dist_low);
+
+    int lower_level_new_eob = 0;
+    const int new_eob = si + 1;
+    uint8_t tmp_levels[3];
+    for (int ni = 0; ni < *nz_num; ++ni) {
+      const int last_ci = nz_ci[ni];
+      tmp_levels[ni] = levels[get_padded_idx(last_ci, bwl)];
+      levels[get_padded_idx(last_ci, bwl)] = 0;
+    }
+
+    const int coeff_ctx_new_eob = get_lower_levels_ctx_general(
+        1, si, bwl, height, levels, ci, tx_size, tx_class);
+    const int new_eob_cost =
+        get_eob_cost(new_eob, txb_eob_costs, txb_costs, tx_class);
+    int rate_coeff_eob =
+        new_eob_cost + get_coeff_cost_general(1, ci, abs_qc, sign,
+                                              coeff_ctx_new_eob, dc_sign_ctx,
+                                              txb_costs, bwl, tx_class, levels);
+    int64_t dist_new_eob = dist;
+    int64_t rd_new_eob = RDCOST(rdmult, rate_coeff_eob, dist_new_eob);
+
+    if (abs_qc_low > 0) {
+      const int rate_coeff_eob_low =
+          new_eob_cost +
+          get_coeff_cost_general(1, ci, abs_qc_low, sign, coeff_ctx_new_eob,
+                                 dc_sign_ctx, txb_costs, bwl, tx_class, levels);
+      const int64_t dist_new_eob_low = dist_low;
+      const int64_t rd_new_eob_low =
+          RDCOST(rdmult, rate_coeff_eob_low, dist_new_eob_low);
+      if (rd_new_eob_low < rd_new_eob) {
+        lower_level_new_eob = 1;
+        rd_new_eob = rd_new_eob_low;
+        rate_coeff_eob = rate_coeff_eob_low;
+        dist_new_eob = dist_new_eob_low;
+      }
+    }
+
+    if (rd_low < rd) {
+      lower_level = 1;
+      rd = rd_low;
+      rate = rate_low;
+      dist = dist_low;
+    }
+
+    if (sharpness == 0 && rd_new_eob < rd) {
+      for (int ni = 0; ni < *nz_num; ++ni) {
+        int last_ci = nz_ci[ni];
+        // levels[get_padded_idx(last_ci, bwl)] = 0;
+        qcoeff[last_ci] = 0;
+        dqcoeff[last_ci] = 0;
+      }
+      *eob = new_eob;
+      *nz_num = 0;
+      *accu_rate = rate_coeff_eob;
+      *accu_dist = dist_new_eob;
+      lower_level = lower_level_new_eob;
+    } else {
+      for (int ni = 0; ni < *nz_num; ++ni) {
+        const int last_ci = nz_ci[ni];
+        levels[get_padded_idx(last_ci, bwl)] = tmp_levels[ni];
+      }
+      *accu_rate += rate;
+      *accu_dist += dist;
+    }
+
+    if (lower_level) {
+      qcoeff[ci] = qc_low;
+      dqcoeff[ci] = dqc_low;
+      levels[get_padded_idx(ci, bwl)] = AOMMIN(abs_qc_low, INT8_MAX);
+    }
+    if (qcoeff[ci]) {
+      nz_ci[*nz_num] = ci;
+      ++*nz_num;
+    }
+  }
+}
+
+static INLINE void update_skip(int *accu_rate, int64_t accu_dist, int *eob,
+                               int nz_num, int *nz_ci, int64_t rdmult,
+                               int skip_cost, int non_skip_cost,
+                               tran_low_t *qcoeff, tran_low_t *dqcoeff,
+                               int sharpness) {
+  const int64_t rd = RDCOST(rdmult, *accu_rate + non_skip_cost, accu_dist);
+  const int64_t rd_new_eob = RDCOST(rdmult, skip_cost, 0);
+  if (sharpness == 0 && rd_new_eob < rd) {
+    for (int i = 0; i < nz_num; ++i) {
+      const int ci = nz_ci[i];
+      qcoeff[ci] = 0;
+      dqcoeff[ci] = 0;
+      // no need to set up levels because this is the last step
+      // levels[get_padded_idx(ci, bwl)] = 0;
+    }
+    *accu_rate = 0;
+    *eob = 0;
+  }
+}
+
+int av1_optimize_txb_new(const struct AV1_COMP *cpi, MACROBLOCK *x, int plane,
+                         int block, TX_SIZE tx_size, TX_TYPE tx_type,
+                         const TXB_CTX *const txb_ctx, int *rate_cost,
+                         int sharpness) {
+  const AV1_COMMON *cm = &cpi->common;
+  MACROBLOCKD *xd = &x->e_mbd;
+  const PLANE_TYPE plane_type = get_plane_type(plane);
+  const TX_SIZE txs_ctx = get_txsize_entropy_ctx(tx_size);
+  const TX_CLASS tx_class = tx_type_to_class[tx_type];
+  const MB_MODE_INFO *mbmi = xd->mi[0];
+  const struct macroblock_plane *p = &x->plane[plane];
+  struct macroblockd_plane *pd = &xd->plane[plane];
+  tran_low_t *qcoeff = BLOCK_OFFSET(p->qcoeff, block);
+  tran_low_t *dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
+  const tran_low_t *tcoeff = BLOCK_OFFSET(p->coeff, block);
+  const int16_t *dequant = p->dequant_QTX;
+  const int bwl = get_txb_bwl(tx_size);
+  const int width = get_txb_wide(tx_size);
+  const int height = get_txb_high(tx_size);
+  assert(width == (1 << bwl));
+  const int is_inter = is_inter_block(mbmi);
+  const SCAN_ORDER *scan_order = get_scan(tx_size, tx_type);
+  const int16_t *scan = scan_order->scan;
+  const LV_MAP_COEFF_COST *txb_costs = &x->coeff_costs[txs_ctx][plane_type];
+  const int eob_multi_size = txsize_log2_minus4[tx_size];
+  const LV_MAP_EOB_COST *txb_eob_costs =
+      &x->eob_costs[eob_multi_size][plane_type];
+
+  const int shift = av1_get_tx_scale(tx_size);
+  const int64_t rdmult =
+      ((x->rdmult * plane_rd_mult[is_inter][plane_type] << (2 * (xd->bd - 8))) +
+       2) >>
+      (sharpness +
+       (cpi->oxcf.aq_mode == VARIANCE_AQ && mbmi->segment_id < 4
+            ? 7 - mbmi->segment_id
+            : 2) +
+       (cpi->oxcf.aq_mode != VARIANCE_AQ &&
+                cpi->oxcf.deltaq_mode > NO_DELTA_Q && x->sb_energy_level < 0
+            ? (3 - x->sb_energy_level)
+            : 0));
+
+  uint8_t levels_buf[TX_PAD_2D];
+  uint8_t *const levels = set_levels(levels_buf, width);
+
+  av1_txb_init_levels(qcoeff, width, height, levels);
+
+  // TODO(angirbird): check iqmatrix
+
+  const int non_skip_cost = txb_costs->txb_skip_cost[txb_ctx->txb_skip_ctx][0];
+  const int skip_cost = txb_costs->txb_skip_cost[txb_ctx->txb_skip_ctx][1];
+  int eob = p->eobs[block];
+  const int eob_cost = get_eob_cost(eob, txb_eob_costs, txb_costs, tx_class);
+  int accu_rate = eob_cost;
+  int64_t accu_dist = 0;
+  int si = eob - 1;
+  const int ci = scan[si];
+  const tran_low_t qc = qcoeff[ci];
+  const tran_low_t abs_qc = abs(qc);
+  const int sign = qc < 0;
+  const int max_nz_num = 2;
+  int nz_num = 1;
+  int nz_ci[3] = { ci, 0, 0 };
+  if (abs_qc >= 2) {
+    update_coeff_general(&accu_rate, &accu_dist, si, eob, tx_size, tx_class,
+                         bwl, height, rdmult, shift, txb_ctx->dc_sign_ctx,
+                         dequant, scan, txb_costs, tcoeff, qcoeff, dqcoeff,
+                         levels);
+    --si;
+  } else {
+    assert(abs_qc == 1);
+    const int coeff_ctx = get_lower_levels_ctx_general(
+        1, si, bwl, height, levels, ci, tx_size, tx_class);
+    accu_rate += get_coeff_cost_general(1, ci, abs_qc, sign, coeff_ctx,
+                                        txb_ctx->dc_sign_ctx, txb_costs, bwl,
+                                        tx_class, levels);
+    const tran_low_t tqc = tcoeff[ci];
+    const tran_low_t dqc = dqcoeff[ci];
+    const int64_t dist = get_coeff_dist(tqc, dqc, shift);
+    const int64_t dist0 = get_coeff_dist(tqc, 0, shift);
+    accu_dist += dist - dist0;
+    --si;
+  }
+
+#define UPDATE_COEFF_EOB_CASE(tx_class_literal)                            \
+  case tx_class_literal:                                                   \
+    for (; si >= 0 && nz_num <= max_nz_num; --si) {                        \
+      update_coeff_eob(&accu_rate, &accu_dist, &eob, &nz_num, nz_ci, si,   \
+                       tx_size, tx_class_literal, bwl, height,             \
+                       txb_ctx->dc_sign_ctx, rdmult, shift, dequant, scan, \
+                       txb_eob_costs, txb_costs, tcoeff, qcoeff, dqcoeff,  \
+                       levels, sharpness);                                 \
+    }                                                                      \
+    break;
+  switch (tx_class) {
+    UPDATE_COEFF_EOB_CASE(TX_CLASS_2D);
+    UPDATE_COEFF_EOB_CASE(TX_CLASS_HORIZ);
+    UPDATE_COEFF_EOB_CASE(TX_CLASS_VERT);
+#undef UPDATE_COEFF_EOB_CASE
+    default: assert(false);
+  }
+
+  if (si == -1 && nz_num <= max_nz_num) {
+    update_skip(&accu_rate, accu_dist, &eob, nz_num, nz_ci, rdmult, skip_cost,
+                non_skip_cost, qcoeff, dqcoeff, sharpness);
+  }
+
+#define UPDATE_COEFF_SIMPLE_CASE(tx_class_literal)                             \
+  case tx_class_literal:                                                       \
+    for (; si >= 1; --si) {                                                    \
+      update_coeff_simple(&accu_rate, si, eob, tx_size, tx_class_literal, bwl, \
+                          rdmult, shift, dequant, scan, txb_costs, tcoeff,     \
+                          qcoeff, dqcoeff, levels);                            \
+    }                                                                          \
+    break;
+  switch (tx_class) {
+    UPDATE_COEFF_SIMPLE_CASE(TX_CLASS_2D);
+    UPDATE_COEFF_SIMPLE_CASE(TX_CLASS_HORIZ);
+    UPDATE_COEFF_SIMPLE_CASE(TX_CLASS_VERT);
+#undef UPDATE_COEFF_SIMPLE_CASE
+    default: assert(false);
+  }
+
+  // DC position
+  if (si == 0) {
+    // no need to update accu_dist because it's not used after this point
+    int64_t dummy_dist = 0;
+    update_coeff_general(&accu_rate, &dummy_dist, si, eob, tx_size, tx_class,
+                         bwl, height, rdmult, shift, txb_ctx->dc_sign_ctx,
+                         dequant, scan, txb_costs, tcoeff, qcoeff, dqcoeff,
+                         levels);
+  }
+
+  const int tx_type_cost = get_tx_type_cost(cm, x, xd, plane, tx_size, tx_type);
+  if (eob == 0)
+    accu_rate += skip_cost;
+  else
+    accu_rate += non_skip_cost + tx_type_cost;
+
+  p->eobs[block] = eob;
+  p->txb_entropy_ctx[block] =
+      av1_get_txb_entropy_context(qcoeff, scan_order, p->eobs[block]);
+
+  *rate_cost = accu_rate;
+  return eob;
+}
+
+// This function is deprecated, but we keep it here because hash trellis
+// is not integrated with av1_optimize_txb_new yet
+int av1_optimize_txb(const struct AV1_COMP *cpi, MACROBLOCK *x, int plane,
+                     int blk_row, int blk_col, int block, TX_SIZE tx_size,
+                     TXB_CTX *txb_ctx, int fast_mode, int *rate_cost) {
+  const AV1_COMMON *cm = &cpi->common;
+  MACROBLOCKD *const xd = &x->e_mbd;
+  const PLANE_TYPE plane_type = get_plane_type(plane);
+  const TX_SIZE txs_ctx = get_txsize_entropy_ctx(tx_size);
+  const TX_TYPE tx_type = av1_get_tx_type(plane_type, xd, blk_row, blk_col,
+                                          tx_size, cm->reduced_tx_set_used);
+  const MB_MODE_INFO *mbmi = xd->mi[0];
+  const struct macroblock_plane *p = &x->plane[plane];
+  struct macroblockd_plane *pd = &xd->plane[plane];
+  const int eob = p->eobs[block];
+  tran_low_t *qcoeff = BLOCK_OFFSET(p->qcoeff, block);
+  tran_low_t *dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
+  const tran_low_t *tcoeff = BLOCK_OFFSET(p->coeff, block);
+  const int16_t *dequant = p->dequant_QTX;
+  const int seg_eob = av1_get_max_eob(tx_size);
+  const int bwl = get_txb_bwl(tx_size);
+  const int width = get_txb_wide(tx_size);
+  const int height = get_txb_high(tx_size);
+  const int is_inter = is_inter_block(mbmi);
+  const SCAN_ORDER *const scan_order = get_scan(tx_size, tx_type);
+  const LV_MAP_COEFF_COST *txb_costs = &x->coeff_costs[txs_ctx][plane_type];
+  const int eob_multi_size = txsize_log2_minus4[tx_size];
+  const LV_MAP_EOB_COST txb_eob_costs =
+      x->eob_costs[eob_multi_size][plane_type];
+
+  const int shift = av1_get_tx_scale(tx_size);
+  const int64_t rdmult =
+      ((x->rdmult * plane_rd_mult[is_inter][plane_type] << (2 * (xd->bd - 8))) +
+       2) >>
+      2;
+  uint8_t levels_buf[TX_PAD_2D];
+  uint8_t *const levels = set_levels(levels_buf, width);
+  const TX_SIZE qm_tx_size = av1_get_adjusted_tx_size(tx_size);
+  const qm_val_t *iqmatrix =
+      IS_2D_TRANSFORM(tx_type)
+          ? pd->seg_iqmatrix[mbmi->segment_id][qm_tx_size]
+          : cm->giqmatrix[NUM_QM_LEVELS - 1][0][qm_tx_size];
+  assert(width == (1 << bwl));
+  const int tx_type_cost = get_tx_type_cost(cm, x, xd, plane, tx_size, tx_type);
+  TxbInfo txb_info = {
+    qcoeff,   levels,       dqcoeff,    tcoeff,  dequant, shift,
+    tx_size,  txs_ctx,      tx_type,    bwl,     width,   height,
+    eob,      seg_eob,      scan_order, txb_ctx, rdmult,  &cm->coeff_ctx_table,
+    iqmatrix, tx_type_cost,
+  };
+
+  // Hash based trellis (hbt) speed feature: avoid expensive optimize_txb calls
+  // by storing the coefficient deltas in a hash table.
+  // Currently disabled in speedfeatures.c
+  if (eob <= HBT_EOB && eob > 0 && cpi->sf.use_hash_based_trellis) {
+    return hbt_create_hashes(&txb_info, txb_costs, &txb_eob_costs, p, block,
+                             fast_mode, rate_cost);
+  }
+
+  av1_txb_init_levels(qcoeff, width, height, levels);
+
+  const int update =
+      optimize_txb(&txb_info, txb_costs, &txb_eob_costs, rate_cost);
+
+  if (update) {
+    p->eobs[block] = txb_info.eob;
+    p->txb_entropy_ctx[block] =
+        av1_get_txb_entropy_context(qcoeff, scan_order, txb_info.eob);
+  }
+  return txb_info.eob;
+}
+
+int av1_get_txb_entropy_context(const tran_low_t *qcoeff,
+                                const SCAN_ORDER *scan_order, int eob) {
+  const int16_t *const scan = scan_order->scan;
+  int cul_level = 0;
+  int c;
+
+  if (eob == 0) return 0;
+  for (c = 0; c < eob; ++c) {
+    cul_level += abs(qcoeff[scan[c]]);
+    if (cul_level > COEFF_CONTEXT_MASK) break;
+  }
+
+  cul_level = AOMMIN(COEFF_CONTEXT_MASK, cul_level);
+  set_dc_sign(&cul_level, qcoeff[0]);
+
+  return cul_level;
+}
+
+void av1_update_txb_context_b(int plane, int block, int blk_row, int blk_col,
+                              BLOCK_SIZE plane_bsize, TX_SIZE tx_size,
+                              void *arg) {
+  struct tokenize_b_args *const args = arg;
+  const AV1_COMP *cpi = args->cpi;
+  const AV1_COMMON *cm = &cpi->common;
+  ThreadData *const td = args->td;
+  MACROBLOCK *const x = &td->mb;
+  MACROBLOCKD *const xd = &x->e_mbd;
+  struct macroblock_plane *p = &x->plane[plane];
+  struct macroblockd_plane *pd = &xd->plane[plane];
+  const uint16_t eob = p->eobs[block];
+  const tran_low_t *qcoeff = BLOCK_OFFSET(p->qcoeff, block);
+  const PLANE_TYPE plane_type = pd->plane_type;
+  const TX_TYPE tx_type = av1_get_tx_type(plane_type, xd, blk_row, blk_col,
+                                          tx_size, cm->reduced_tx_set_used);
+  const SCAN_ORDER *const scan_order = get_scan(tx_size, tx_type);
+  const int cul_level = av1_get_txb_entropy_context(qcoeff, scan_order, eob);
+  av1_set_contexts(xd, pd, plane, plane_bsize, tx_size, cul_level, blk_col,
+                   blk_row);
+}
+
+static void update_tx_type_count(const AV1_COMMON *cm, MACROBLOCKD *xd,
+                                 int blk_row, int blk_col, int plane,
+                                 TX_SIZE tx_size, FRAME_COUNTS *counts,
+                                 uint8_t allow_update_cdf) {
+  MB_MODE_INFO *mbmi = xd->mi[0];
+  int is_inter = is_inter_block(mbmi);
+  FRAME_CONTEXT *fc = xd->tile_ctx;
+#if !CONFIG_ENTROPY_STATS
+  (void)counts;
+#endif  // !CONFIG_ENTROPY_STATS
+
+  // Only y plane's tx_type is updated
+  if (plane > 0) return;
+  TX_TYPE tx_type = av1_get_tx_type(PLANE_TYPE_Y, xd, blk_row, blk_col, tx_size,
+                                    cm->reduced_tx_set_used);
+  if (get_ext_tx_types(tx_size, is_inter, cm->reduced_tx_set_used) > 1 &&
+      cm->base_qindex > 0 && !mbmi->skip &&
+      !segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
+    const int eset = get_ext_tx_set(tx_size, is_inter, cm->reduced_tx_set_used);
+    if (eset > 0) {
+      const TxSetType tx_set_type =
+          av1_get_ext_tx_set_type(tx_size, is_inter, cm->reduced_tx_set_used);
+      if (is_inter) {
+        if (allow_update_cdf) {
+          update_cdf(fc->inter_ext_tx_cdf[eset][txsize_sqr_map[tx_size]],
+                     av1_ext_tx_ind[tx_set_type][tx_type],
+                     av1_num_ext_tx_set[tx_set_type]);
+        }
+#if CONFIG_ENTROPY_STATS
+        ++counts->inter_ext_tx[eset][txsize_sqr_map[tx_size]]
+                              [av1_ext_tx_ind[tx_set_type][tx_type]];
+#endif  // CONFIG_ENTROPY_STATS
+      } else {
+        PREDICTION_MODE intra_dir;
+        if (mbmi->filter_intra_mode_info.use_filter_intra)
+          intra_dir = fimode_to_intradir[mbmi->filter_intra_mode_info
+                                             .filter_intra_mode];
+        else
+          intra_dir = mbmi->mode;
+#if CONFIG_ENTROPY_STATS
+        ++counts->intra_ext_tx[eset][txsize_sqr_map[tx_size]][intra_dir]
+                              [av1_ext_tx_ind[tx_set_type][tx_type]];
+#endif  // CONFIG_ENTROPY_STATS
+        if (allow_update_cdf) {
+          update_cdf(
+              fc->intra_ext_tx_cdf[eset][txsize_sqr_map[tx_size]][intra_dir],
+              av1_ext_tx_ind[tx_set_type][tx_type],
+              av1_num_ext_tx_set[tx_set_type]);
+        }
+      }
+    }
+  }
+}
+
+void av1_update_and_record_txb_context(int plane, int block, int blk_row,
+                                       int blk_col, BLOCK_SIZE plane_bsize,
+                                       TX_SIZE tx_size, void *arg) {
+  struct tokenize_b_args *const args = arg;
+  const AV1_COMP *cpi = args->cpi;
+  const AV1_COMMON *cm = &cpi->common;
+  ThreadData *const td = args->td;
+  MACROBLOCK *const x = &td->mb;
+  MACROBLOCKD *const xd = &x->e_mbd;
+  struct macroblock_plane *p = &x->plane[plane];
+  struct macroblockd_plane *pd = &xd->plane[plane];
+  MB_MODE_INFO *mbmi = xd->mi[0];
+  const int eob = p->eobs[block];
+  TXB_CTX txb_ctx;
+  get_txb_ctx(plane_bsize, tx_size, plane, pd->above_context + blk_col,
+              pd->left_context + blk_row, &txb_ctx);
+  const int bwl = get_txb_bwl(tx_size);
+  const int width = get_txb_wide(tx_size);
+  const int height = get_txb_high(tx_size);
+  const uint8_t allow_update_cdf = args->allow_update_cdf;
+  const TX_SIZE txsize_ctx = get_txsize_entropy_ctx(tx_size);
+  FRAME_CONTEXT *ec_ctx = xd->tile_ctx;
+#if CONFIG_ENTROPY_STATS
+  int cdf_idx = cm->coef_cdf_category;
+#endif  // CONFIG_ENTROPY_STATS
+
+#if CONFIG_ENTROPY_STATS
+  ++td->counts->txb_skip[cdf_idx][txsize_ctx][txb_ctx.txb_skip_ctx][eob == 0];
+#endif  // CONFIG_ENTROPY_STATS
+  if (allow_update_cdf) {
+    update_cdf(ec_ctx->txb_skip_cdf[txsize_ctx][txb_ctx.txb_skip_ctx], eob == 0,
+               2);
+  }
+
+  x->mbmi_ext->txb_skip_ctx[plane][block] = txb_ctx.txb_skip_ctx;
+  x->mbmi_ext->eobs[plane][block] = eob;
+
+  if (eob == 0) {
+    av1_set_contexts(xd, pd, plane, plane_bsize, tx_size, 0, blk_col, blk_row);
+    return;
+  }
+
+  tran_low_t *tcoeff = BLOCK_OFFSET(x->mbmi_ext->tcoeff[plane], block);
+  const int segment_id = mbmi->segment_id;
+  const int seg_eob = av1_get_tx_eob(&cpi->common.seg, segment_id, tx_size);
+  const tran_low_t *qcoeff = BLOCK_OFFSET(p->qcoeff, block);
+  memcpy(tcoeff, qcoeff, sizeof(*tcoeff) * seg_eob);
+
+  uint8_t levels_buf[TX_PAD_2D];
+  uint8_t *const levels = set_levels(levels_buf, width);
+  av1_txb_init_levels(tcoeff, width, height, levels);
+  update_tx_type_count(cm, xd, blk_row, blk_col, plane, tx_size, td->counts,
+                       allow_update_cdf);
+
+  const PLANE_TYPE plane_type = pd->plane_type;
+  const TX_TYPE tx_type = av1_get_tx_type(plane_type, xd, blk_row, blk_col,
+                                          tx_size, cm->reduced_tx_set_used);
+  const TX_CLASS tx_class = tx_type_to_class[tx_type];
+  const SCAN_ORDER *const scan_order = get_scan(tx_size, tx_type);
+  const int16_t *const scan = scan_order->scan;
+#if CONFIG_ENTROPY_STATS
+  av1_update_eob_context(cdf_idx, eob, tx_size, tx_class, plane_type, ec_ctx,
+                         td->counts, allow_update_cdf);
+#else
+  av1_update_eob_context(eob, tx_size, tx_class, plane_type, ec_ctx,
+                         allow_update_cdf);
+#endif
+
+  DECLARE_ALIGNED(16, int8_t, coeff_contexts[MAX_TX_SQUARE]);
+  av1_get_nz_map_contexts(levels, scan, eob, tx_size, tx_class, coeff_contexts);
+
+  for (int c = eob - 1; c >= 0; --c) {
+    const int pos = scan[c];
+    const int coeff_ctx = coeff_contexts[pos];
+    const tran_low_t v = qcoeff[pos];
+    const tran_low_t level = abs(v);
+
+    if (allow_update_cdf) {
+      if (c == eob - 1) {
+        assert(coeff_ctx < 4);
+        update_cdf(
+            ec_ctx->coeff_base_eob_cdf[txsize_ctx][plane_type][coeff_ctx],
+            AOMMIN(level, 3) - 1, 3);
+      } else {
+        update_cdf(ec_ctx->coeff_base_cdf[txsize_ctx][plane_type][coeff_ctx],
+                   AOMMIN(level, 3), 4);
+      }
+    }
+    {
+      if (c == eob - 1) {
+        assert(coeff_ctx < 4);
+#if CONFIG_ENTROPY_STATS
+        ++td->counts->coeff_base_eob_multi[cdf_idx][txsize_ctx][plane_type]
+                                          [coeff_ctx][AOMMIN(level, 3) - 1];
+      } else {
+        ++td->counts->coeff_base_multi[cdf_idx][txsize_ctx][plane_type]
+                                      [coeff_ctx][AOMMIN(level, 3)];
+#endif
+      }
+    }
+    if (level > NUM_BASE_LEVELS) {
+      const int base_range = level - 1 - NUM_BASE_LEVELS;
+      const int br_ctx = get_br_ctx(levels, pos, bwl, tx_class);
+      for (int idx = 0; idx < COEFF_BASE_RANGE; idx += BR_CDF_SIZE - 1) {
+        const int k = AOMMIN(base_range - idx, BR_CDF_SIZE - 1);
+        if (allow_update_cdf) {
+          update_cdf(ec_ctx->coeff_br_cdf[AOMMIN(txsize_ctx, TX_32X32)]
+                                         [plane_type][br_ctx],
+                     k, BR_CDF_SIZE);
+        }
+        for (int lps = 0; lps < BR_CDF_SIZE - 1; lps++) {
+#if CONFIG_ENTROPY_STATS
+          ++td->counts->coeff_lps[AOMMIN(txsize_ctx, TX_32X32)][plane_type][lps]
+                                 [br_ctx][lps == k];
+#endif  // CONFIG_ENTROPY_STATS
+          if (lps == k) break;
+        }
+#if CONFIG_ENTROPY_STATS
+        ++td->counts->coeff_lps_multi[cdf_idx][AOMMIN(txsize_ctx, TX_32X32)]
+                                     [plane_type][br_ctx][k];
+#endif
+        if (k < BR_CDF_SIZE - 1) break;
+      }
+    }
+  }
+
+  // Update the context needed to code the DC sign (if applicable)
+  if (tcoeff[0] != 0) {
+    const int dc_sign = (tcoeff[0] < 0) ? 1 : 0;
+    const int dc_sign_ctx = txb_ctx.dc_sign_ctx;
+#if CONFIG_ENTROPY_STATS
+    ++td->counts->dc_sign[plane_type][dc_sign_ctx][dc_sign];
+#endif  // CONFIG_ENTROPY_STATS
+    if (allow_update_cdf)
+      update_cdf(ec_ctx->dc_sign_cdf[plane_type][dc_sign_ctx], dc_sign, 2);
+    x->mbmi_ext->dc_sign_ctx[plane][block] = dc_sign_ctx;
+  }
+
+  const int cul_level = av1_get_txb_entropy_context(tcoeff, scan_order, eob);
+  av1_set_contexts(xd, pd, plane, plane_bsize, tx_size, cul_level, blk_col,
+                   blk_row);
+}
+
+void av1_update_txb_context(const AV1_COMP *cpi, ThreadData *td,
+                            RUN_TYPE dry_run, BLOCK_SIZE bsize, int *rate,
+                            int mi_row, int mi_col, uint8_t allow_update_cdf) {
+  const AV1_COMMON *const cm = &cpi->common;
+  const int num_planes = av1_num_planes(cm);
+  MACROBLOCK *const x = &td->mb;
+  MACROBLOCKD *const xd = &x->e_mbd;
+  MB_MODE_INFO *const mbmi = xd->mi[0];
+  struct tokenize_b_args arg = { cpi, td, NULL, 0, allow_update_cdf };
+  (void)rate;
+  (void)mi_row;
+  (void)mi_col;
+  if (mbmi->skip) {
+    av1_reset_skip_context(xd, mi_row, mi_col, bsize, num_planes);
+    return;
+  }
+
+  if (!dry_run) {
+    av1_foreach_transformed_block(xd, bsize, mi_row, mi_col,
+                                  av1_update_and_record_txb_context, &arg,
+                                  num_planes);
+  } else if (dry_run == DRY_RUN_NORMAL) {
+    av1_foreach_transformed_block(xd, bsize, mi_row, mi_col,
+                                  av1_update_txb_context_b, &arg, num_planes);
+  } else {
+    printf("DRY_RUN_COSTCOEFFS is not supported yet\n");
+    assert(0);
+  }
+}