decodeframe.c 153 KB
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/*
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 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
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 *
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 * 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.
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 */

#include <assert.h>
#include <stdlib.h>  // qsort()

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#include "./aom_config.h"
#include "./aom_dsp_rtcd.h"
#include "./aom_scale_rtcd.h"
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#include "./av1_rtcd.h"
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#include "aom/aom_codec.h"
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#include "aom_dsp/aom_dsp_common.h"
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#include "aom_dsp/binary_codes_reader.h"
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#include "aom_dsp/bitreader.h"
#include "aom_dsp/bitreader_buffer.h"
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#include "aom_mem/aom_mem.h"
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#include "aom_ports/mem.h"
#include "aom_ports/mem_ops.h"
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#include "aom_scale/aom_scale.h"
#include "aom_util/aom_thread.h"
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#if CONFIG_BITSTREAM_DEBUG
#include "aom_util/debug_util.h"
#endif  // CONFIG_BITSTREAM_DEBUG

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#include "av1/common/alloccommon.h"
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#if CONFIG_CDEF
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#include "av1/common/cdef.h"
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#endif
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#if CONFIG_INSPECTION
#include "av1/decoder/inspection.h"
#endif
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#include "av1/common/common.h"
#include "av1/common/entropy.h"
#include "av1/common/entropymode.h"
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#include "av1/common/entropymv.h"
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#include "av1/common/idct.h"
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#include "av1/common/mvref_common.h"
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#include "av1/common/pred_common.h"
#include "av1/common/quant_common.h"
#include "av1/common/reconinter.h"
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#include "av1/common/reconintra.h"
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#if CONFIG_FRAME_SUPERRES
#include "av1/common/resize.h"
#endif  // CONFIG_FRAME_SUPERRES
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#include "av1/common/seg_common.h"
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#include "av1/common/thread_common.h"
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#include "av1/common/tile_common.h"
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#include "av1/decoder/decodeframe.h"
#include "av1/decoder/decodemv.h"
#include "av1/decoder/decoder.h"
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#if CONFIG_LV_MAP
#include "av1/decoder/decodetxb.h"
#endif
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#include "av1/decoder/detokenize.h"
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#include "av1/decoder/dsubexp.h"
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#include "av1/decoder/symbolrate.h"
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#if CONFIG_WARPED_MOTION || CONFIG_GLOBAL_MOTION
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#include "av1/common/warped_motion.h"
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#endif  // CONFIG_WARPED_MOTION || CONFIG_GLOBAL_MOTION
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#define MAX_AV1_HEADER_SIZE 80
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#define ACCT_STR __func__
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#if CONFIG_CFL
#include "av1/common/cfl.h"
#endif

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#if CONFIG_STRIPED_LOOP_RESTORATION && !CONFIG_LOOP_RESTORATION
#error "striped_loop_restoration requires loop_restoration"
#endif

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#if CONFIG_LOOP_RESTORATION
static void loop_restoration_read_sb_coeffs(const AV1_COMMON *const cm,
                                            MACROBLOCKD *xd,
                                            aom_reader *const r, int plane,
                                            int rtile_idx);
#endif

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static struct aom_read_bit_buffer *init_read_bit_buffer(
    AV1Decoder *pbi, struct aom_read_bit_buffer *rb, const uint8_t *data,
    const uint8_t *data_end, uint8_t clear_data[MAX_AV1_HEADER_SIZE]);
static int read_compressed_header(AV1Decoder *pbi, const uint8_t *data,
                                  size_t partition_size);
static size_t read_uncompressed_header(AV1Decoder *pbi,
                                       struct aom_read_bit_buffer *rb);

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static int is_compound_reference_allowed(const AV1_COMMON *cm) {
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#if CONFIG_ONE_SIDED_COMPOUND  // Normative in decoder
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  return !frame_is_intra_only(cm);
#else
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  int i;
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  if (frame_is_intra_only(cm)) return 0;
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  for (i = 1; i < INTER_REFS_PER_FRAME; ++i)
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    if (cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1]) return 1;
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  return 0;
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#endif  // CONFIG_ONE_SIDED_COMPOUND
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}

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static void setup_compound_reference_mode(AV1_COMMON *cm) {
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  cm->comp_fwd_ref[0] = LAST_FRAME;
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  cm->comp_fwd_ref[1] = LAST2_FRAME;
  cm->comp_fwd_ref[2] = LAST3_FRAME;
  cm->comp_fwd_ref[3] = GOLDEN_FRAME;

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  cm->comp_bwd_ref[0] = BWDREF_FRAME;
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  cm->comp_bwd_ref[1] = ALTREF2_FRAME;
  cm->comp_bwd_ref[2] = ALTREF_FRAME;
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}

static int read_is_valid(const uint8_t *start, size_t len, const uint8_t *end) {
  return len != 0 && len <= (size_t)(end - start);
}

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static int decode_unsigned_max(struct aom_read_bit_buffer *rb, int max) {
  const int data = aom_rb_read_literal(rb, get_unsigned_bits(max));
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  return data > max ? max : data;
}

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static TX_MODE read_tx_mode(AV1_COMMON *cm, struct aom_read_bit_buffer *rb) {
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#if CONFIG_TX64X64
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  TX_MODE tx_mode;
#endif
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  if (cm->all_lossless) return ONLY_4X4;
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#if CONFIG_VAR_TX_NO_TX_MODE
  (void)rb;
  return TX_MODE_SELECT;
#else
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#if CONFIG_TX64X64
  tx_mode = aom_rb_read_bit(rb) ? TX_MODE_SELECT : aom_rb_read_literal(rb, 2);
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  if (tx_mode == ALLOW_32X32) tx_mode += aom_rb_read_bit(rb);
  return tx_mode;
#else
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  return aom_rb_read_bit(rb) ? TX_MODE_SELECT : aom_rb_read_literal(rb, 2);
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#endif  // CONFIG_TX64X64
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#endif  // CONFIG_VAR_TX_NO_TX_MODE
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}
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#if !CONFIG_RESTRICT_COMPRESSED_HDR
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static void read_inter_mode_probs(FRAME_CONTEXT *fc, aom_reader *r) {
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  int i;
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  for (i = 0; i < NEWMV_MODE_CONTEXTS; ++i)
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    av1_diff_update_prob(r, &fc->newmv_prob[i], ACCT_STR);
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  for (i = 0; i < ZEROMV_MODE_CONTEXTS; ++i)
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    av1_diff_update_prob(r, &fc->zeromv_prob[i], ACCT_STR);
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  for (i = 0; i < REFMV_MODE_CONTEXTS; ++i)
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    av1_diff_update_prob(r, &fc->refmv_prob[i], ACCT_STR);
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  for (i = 0; i < DRL_MODE_CONTEXTS; ++i)
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    av1_diff_update_prob(r, &fc->drl_prob[i], ACCT_STR);
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}
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#endif
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static REFERENCE_MODE read_frame_reference_mode(
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    const AV1_COMMON *cm, struct aom_read_bit_buffer *rb) {
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  if (is_compound_reference_allowed(cm)) {
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#if CONFIG_REF_ADAPT
    return aom_rb_read_bit(rb) ? REFERENCE_MODE_SELECT : SINGLE_REFERENCE;
#else
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    return aom_rb_read_bit(rb)
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               ? REFERENCE_MODE_SELECT
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               : (aom_rb_read_bit(rb) ? COMPOUND_REFERENCE : SINGLE_REFERENCE);
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#endif  // CONFIG_REF_ADAPT
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  } else {
    return SINGLE_REFERENCE;
  }
}
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#if !CONFIG_RESTRICT_COMPRESSED_HDR
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static void read_frame_reference_mode_probs(AV1_COMMON *cm, aom_reader *r) {
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  FRAME_CONTEXT *const fc = cm->fc;
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  int i;
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  if (cm->reference_mode == REFERENCE_MODE_SELECT)
    for (i = 0; i < COMP_INTER_CONTEXTS; ++i)
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      av1_diff_update_prob(r, &fc->comp_inter_prob[i], ACCT_STR);
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  if (cm->reference_mode != COMPOUND_REFERENCE) {
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    for (i = 0; i < REF_CONTEXTS; ++i) {
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      int j;
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      for (j = 0; j < (SINGLE_REFS - 1); ++j) {
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        av1_diff_update_prob(r, &fc->single_ref_prob[i][j], ACCT_STR);
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      }
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    }
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  }
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  if (cm->reference_mode != SINGLE_REFERENCE) {
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#if CONFIG_EXT_COMP_REFS
    for (i = 0; i < COMP_REF_TYPE_CONTEXTS; ++i)
      av1_diff_update_prob(r, &fc->comp_ref_type_prob[i], ACCT_STR);

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    for (i = 0; i < UNI_COMP_REF_CONTEXTS; ++i) {
      int j;
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      for (j = 0; j < (UNIDIR_COMP_REFS - 1); ++j)
        av1_diff_update_prob(r, &fc->uni_comp_ref_prob[i][j], ACCT_STR);
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    }
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#endif  // CONFIG_EXT_COMP_REFS

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    for (i = 0; i < REF_CONTEXTS; ++i) {
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      int j;
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      for (j = 0; j < (FWD_REFS - 1); ++j)
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        av1_diff_update_prob(r, &fc->comp_ref_prob[i][j], ACCT_STR);
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      for (j = 0; j < (BWD_REFS - 1); ++j)
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        av1_diff_update_prob(r, &fc->comp_bwdref_prob[i][j], ACCT_STR);
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    }
  }
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}

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static void update_mv_probs(aom_prob *p, int n, aom_reader *r) {
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  int i;
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  for (i = 0; i < n; ++i) av1_diff_update_prob(r, &p[i], ACCT_STR);
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}

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static void read_mv_probs(nmv_context *ctx, int allow_hp, aom_reader *r) {
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  int i;
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  if (allow_hp) {
    for (i = 0; i < 2; ++i) {
      nmv_component *const comp_ctx = &ctx->comps[i];
      update_mv_probs(&comp_ctx->class0_hp, 1, r);
      update_mv_probs(&comp_ctx->hp, 1, r);
    }
  }
}
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#endif
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static void inverse_transform_block(MACROBLOCKD *xd, int plane,
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#if CONFIG_LGT_FROM_PRED
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                                    PREDICTION_MODE mode,
#endif
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                                    const TX_TYPE tx_type,
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                                    const TX_SIZE tx_size, uint8_t *dst,
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                                    int stride, int16_t scan_line, int eob) {
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  struct macroblockd_plane *const pd = &xd->plane[plane];
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  tran_low_t *const dqcoeff = pd->dqcoeff;
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  av1_inverse_transform_block(xd, dqcoeff,
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#if CONFIG_LGT_FROM_PRED
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                              mode,
#endif
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#if CONFIG_MRC_TX && SIGNAL_ANY_MRC_MASK
                              xd->mrc_mask,
#endif  // CONFIG_MRC_TX && SIGNAL_ANY_MRC_MASK
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                              tx_type, tx_size, dst, stride, eob);
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  memset(dqcoeff, 0, (scan_line + 1) * sizeof(dqcoeff[0]));
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}

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static int get_block_idx(const MACROBLOCKD *xd, int plane, int row, int col) {
  const int bsize = xd->mi[0]->mbmi.sb_type;
  const struct macroblockd_plane *pd = &xd->plane[plane];
#if CONFIG_CHROMA_SUB8X8
  const BLOCK_SIZE plane_bsize =
      AOMMAX(BLOCK_4X4, get_plane_block_size(bsize, pd));
#else
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  const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
#endif  // CONFIG_CHROMA_SUB8X8
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  const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane);
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  const TX_SIZE tx_size = av1_get_tx_size(plane, xd);
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  const uint8_t txh_unit = tx_size_high_unit[tx_size];
  return row * max_blocks_wide + col * txh_unit;
}

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static void predict_and_reconstruct_intra_block(
    AV1_COMMON *cm, MACROBLOCKD *const xd, aom_reader *const r,
    MB_MODE_INFO *const mbmi, int plane, int row, int col, TX_SIZE tx_size) {
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  PLANE_TYPE plane_type = get_plane_type(plane);
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  const int block_idx = get_block_idx(xd, plane, row, col);
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  av1_predict_intra_block_facade(cm, xd, plane, block_idx, col, row, tx_size);
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  if (!mbmi->skip) {
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    struct macroblockd_plane *const pd = &xd->plane[plane];
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#if CONFIG_LV_MAP
    int16_t max_scan_line = 0;
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    int eob;
    av1_read_coeffs_txb_facade(cm, xd, r, row, col, block_idx, plane,
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                               pd->dqcoeff, tx_size, &max_scan_line, &eob);
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    // tx_type will be read out in av1_read_coeffs_txb_facade
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    const TX_TYPE tx_type =
        av1_get_tx_type(plane_type, xd, row, col, block_idx, tx_size);
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#else   // CONFIG_LV_MAP
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    const TX_TYPE tx_type =
        av1_get_tx_type(plane_type, xd, row, col, block_idx, tx_size);
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    const SCAN_ORDER *scan_order = get_scan(cm, tx_size, tx_type, mbmi);
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    int16_t max_scan_line = 0;
    const int eob =
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        av1_decode_block_tokens(cm, xd, plane, scan_order, col, row, tx_size,
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                                tx_type, &max_scan_line, r, mbmi->segment_id);
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#endif  // CONFIG_LV_MAP
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    if (eob) {
      uint8_t *dst =
          &pd->dst.buf[(row * pd->dst.stride + col) << tx_size_wide_log2[0]];
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      inverse_transform_block(xd, plane,
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#if CONFIG_LGT_FROM_PRED
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                              mbmi->mode,
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#endif
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                              tx_type, tx_size, dst, pd->dst.stride,
                              max_scan_line, eob);
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    }
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  }
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#if CONFIG_CFL
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  if (plane == AOM_PLANE_Y && xd->cfl->store_y) {
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    cfl_store_tx(xd, row, col, tx_size, mbmi->sb_type);
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  }
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#endif  // CONFIG_CFL
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}

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#if !CONFIG_COEF_INTERLEAVE
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static void decode_reconstruct_tx(AV1_COMMON *cm, MACROBLOCKD *const xd,
                                  aom_reader *r, MB_MODE_INFO *const mbmi,
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                                  int plane, BLOCK_SIZE plane_bsize,
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                                  int blk_row, int blk_col, int block,
                                  TX_SIZE tx_size, int *eob_total) {
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  const struct macroblockd_plane *const pd = &xd->plane[plane];
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  const BLOCK_SIZE bsize = txsize_to_bsize[tx_size];
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  const int tx_row = blk_row >> (1 - pd->subsampling_y);
  const int tx_col = blk_col >> (1 - pd->subsampling_x);
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  const TX_SIZE plane_tx_size =
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      plane ? uv_txsize_lookup[bsize][mbmi->inter_tx_size[tx_row][tx_col]][0][0]
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            : mbmi->inter_tx_size[tx_row][tx_col];
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  // Scale to match transform block unit.
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  const int max_blocks_high = max_block_high(xd, plane_bsize, plane);
  const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane);
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  if (blk_row >= max_blocks_high || blk_col >= max_blocks_wide) return;
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  if (tx_size == plane_tx_size) {
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    PLANE_TYPE plane_type = get_plane_type(plane);
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#if CONFIG_LV_MAP
    int16_t max_scan_line = 0;
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    int eob;
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    av1_read_coeffs_txb_facade(cm, xd, r, blk_row, blk_col, block, plane,
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                               pd->dqcoeff, tx_size, &max_scan_line, &eob);
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    // tx_type will be read out in av1_read_coeffs_txb_facade
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    const TX_TYPE tx_type =
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        av1_get_tx_type(plane_type, xd, blk_row, blk_col, block, plane_tx_size);
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#else   // CONFIG_LV_MAP
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    const TX_TYPE tx_type =
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        av1_get_tx_type(plane_type, xd, blk_row, blk_col, block, plane_tx_size);
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    const SCAN_ORDER *sc = get_scan(cm, plane_tx_size, tx_type, mbmi);
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    int16_t max_scan_line = 0;
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    const int eob = av1_decode_block_tokens(
        cm, xd, plane, sc, blk_col, blk_row, plane_tx_size, tx_type,
        &max_scan_line, r, mbmi->segment_id);
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#endif  // CONFIG_LV_MAP
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    inverse_transform_block(xd, plane,
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#if CONFIG_LGT_FROM_PRED
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                            mbmi->mode,
#endif
                            tx_type, plane_tx_size,
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                            &pd->dst.buf[(blk_row * pd->dst.stride + blk_col)
                                         << tx_size_wide_log2[0]],
                            pd->dst.stride, max_scan_line, eob);
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    *eob_total += eob;
  } else {
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#if CONFIG_RECT_TX_EXT
    int is_qttx = plane_tx_size == quarter_txsize_lookup[plane_bsize];
    const TX_SIZE sub_txs = is_qttx ? plane_tx_size : sub_tx_size_map[tx_size];
    if (is_qttx) assert(blk_row == 0 && blk_col == 0 && block == 0);
#else
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    const TX_SIZE sub_txs = sub_tx_size_map[tx_size];
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    assert(IMPLIES(tx_size <= TX_4X4, sub_txs == tx_size));
    assert(IMPLIES(tx_size > TX_4X4, sub_txs < tx_size));
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#endif
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    const int bsl = tx_size_wide_unit[sub_txs];
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    int sub_step = tx_size_wide_unit[sub_txs] * tx_size_high_unit[sub_txs];
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    int i;

    assert(bsl > 0);

    for (i = 0; i < 4; ++i) {
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#if CONFIG_RECT_TX_EXT
      int is_wide_tx = tx_size_wide_unit[sub_txs] > tx_size_high_unit[sub_txs];
      const int offsetr =
          is_qttx ? (is_wide_tx ? i * tx_size_high_unit[sub_txs] : 0)
                  : blk_row + ((i >> 1) * bsl);
      const int offsetc =
          is_qttx ? (is_wide_tx ? 0 : i * tx_size_wide_unit[sub_txs])
                  : blk_col + (i & 0x01) * bsl;
#else
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      const int offsetr = blk_row + (i >> 1) * bsl;
      const int offsetc = blk_col + (i & 0x01) * bsl;
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#endif
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      if (offsetr >= max_blocks_high || offsetc >= max_blocks_wide) continue;
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      decode_reconstruct_tx(cm, xd, r, mbmi, plane, plane_bsize, offsetr,
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                            offsetc, block, sub_txs, eob_total);
      block += sub_step;
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    }
  }
}
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#endif
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#if CONFIG_COEF_INTERLEAVE || (!CONFIG_EXT_TX && CONFIG_RECT_TX)
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static int reconstruct_inter_block(AV1_COMMON *cm, MACROBLOCKD *const xd,
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                                   aom_reader *const r, int segment_id,
                                   int plane, int row, int col,
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                                   TX_SIZE tx_size) {
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  PLANE_TYPE plane_type = get_plane_type(plane);
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  int block_idx = get_block_idx(xd, plane, row, col);
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  struct macroblockd_plane *const pd = &xd->plane[plane];
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#if CONFIG_LV_MAP
  (void)segment_id;
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  int16_t max_scan_line = 0;
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  int eob;
  av1_read_coeffs_txb_facade(cm, xd, r, row, col, block_idx, plane, pd->dqcoeff,
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                             tx_size, &max_scan_line, &eob);
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  // tx_type will be read out in av1_read_coeffs_txb_facade
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  const TX_TYPE tx_type =
      av1_get_tx_type(plane_type, xd, row, col, block_idx, tx_size);
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#else   // CONFIG_LV_MAP
  int16_t max_scan_line = 0;
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  const TX_TYPE tx_type =
      av1_get_tx_type(plane_type, xd, row, col, block_idx, tx_size);
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  const SCAN_ORDER *scan_order =
      get_scan(cm, tx_size, tx_type, &xd->mi[0]->mbmi);
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  const int eob =
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      av1_decode_block_tokens(cm, xd, plane, scan_order, col, row, tx_size,
                              tx_type, &max_scan_line, r, segment_id);
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#endif  // CONFIG_LV_MAP
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  uint8_t *dst =
      &pd->dst.buf[(row * pd->dst.stride + col) << tx_size_wide_log2[0]];
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  if (eob)
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    inverse_transform_block(xd, plane,
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#if CONFIG_LGT_FROM_PRED
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                            xd->mi[0]->mbmi.mode,
#endif
                            tx_type, tx_size, dst, pd->dst.stride,
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                            max_scan_line, eob);
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  return eob;
}
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#endif  // CONFIG_SUPER_TX
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static void set_offsets(AV1_COMMON *const cm, MACROBLOCKD *const xd,
                        BLOCK_SIZE bsize, int mi_row, int mi_col, int bw,
                        int bh, int x_mis, int y_mis) {
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  const int offset = mi_row * cm->mi_stride + mi_col;
  int x, y;
  const TileInfo *const tile = &xd->tile;

  xd->mi = cm->mi_grid_visible + offset;
  xd->mi[0] = &cm->mi[offset];
  // TODO(slavarnway): Generate sb_type based on bwl and bhl, instead of
  // passing bsize from decode_partition().
  xd->mi[0]->mbmi.sb_type = bsize;
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#if CONFIG_RD_DEBUG
  xd->mi[0]->mbmi.mi_row = mi_row;
  xd->mi[0]->mbmi.mi_col = mi_col;
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#endif
#if CONFIG_CFL
  xd->cfl->mi_row = mi_row;
  xd->cfl->mi_col = mi_col;
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#endif
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  for (y = 0; y < y_mis; ++y)
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    for (x = !y; x < x_mis; ++x) xd->mi[y * cm->mi_stride + x] = xd->mi[0];
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  set_plane_n4(xd, bw, bh);
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  set_skip_context(xd, mi_row, mi_col);

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  // Distance of Mb to the various image edges. These are specified to 8th pel
  // as they are always compared to values that are in 1/8th pel units
  set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw,
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#if CONFIG_DEPENDENT_HORZTILES
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                 cm->dependent_horz_tiles,
#endif  // CONFIG_DEPENDENT_HORZTILES
                 cm->mi_rows, cm->mi_cols);
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  av1_setup_dst_planes(xd->plane, bsize, get_frame_new_buffer(cm), mi_row,
                       mi_col);
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}

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static void decode_mbmi_block(AV1Decoder *const pbi, MACROBLOCKD *const xd,
                              int mi_row, int mi_col, aom_reader *r,
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#if CONFIG_EXT_PARTITION_TYPES
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                              PARTITION_TYPE partition,
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#endif  // CONFIG_EXT_PARTITION_TYPES
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                              BLOCK_SIZE bsize) {
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  AV1_COMMON *const cm = &pbi->common;
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  const int bw = mi_size_wide[bsize];
  const int bh = mi_size_high[bsize];
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  const int x_mis = AOMMIN(bw, cm->mi_cols - mi_col);
  const int y_mis = AOMMIN(bh, cm->mi_rows - mi_row);
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#if CONFIG_ACCOUNTING
  aom_accounting_set_context(&pbi->accounting, mi_col, mi_row);
#endif
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  set_offsets(cm, xd, bsize, mi_row, mi_col, bw, bh, x_mis, y_mis);
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#if CONFIG_EXT_PARTITION_TYPES
  xd->mi[0]->mbmi.partition = partition;
#endif
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  av1_read_mode_info(pbi, xd, mi_row, mi_col, r, x_mis, y_mis);
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  if (bsize >= BLOCK_8X8 && (cm->subsampling_x || cm->subsampling_y)) {
    const BLOCK_SIZE uv_subsize =
        ss_size_lookup[bsize][cm->subsampling_x][cm->subsampling_y];
    if (uv_subsize == BLOCK_INVALID)
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      aom_internal_error(xd->error_info, AOM_CODEC_CORRUPT_FRAME,
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                         "Invalid block size.");
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  }

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  int reader_corrupted_flag = aom_reader_has_error(r);
  aom_merge_corrupted_flag(&xd->corrupted, reader_corrupted_flag);
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}

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#if CONFIG_NCOBMC_ADAPT_WEIGHT
static void set_mode_info_offsets(AV1_COMMON *const cm, MACROBLOCKD *const xd,
                                  int mi_row, int mi_col) {
  const int offset = mi_row * cm->mi_stride + mi_col;
  xd->mi = cm->mi_grid_visible + offset;
  xd->mi[0] = &cm->mi[offset];
}

static void get_ncobmc_recon(AV1_COMMON *const cm, MACROBLOCKD *xd, int mi_row,
                             int mi_col, int bsize, int mode) {
  uint8_t *pred_buf[4][MAX_MB_PLANE];
  int pred_stride[MAX_MB_PLANE] = { MAX_SB_SIZE, MAX_SB_SIZE, MAX_SB_SIZE };
  // target block in pxl
  int pxl_row = mi_row << MI_SIZE_LOG2;
  int pxl_col = mi_col << MI_SIZE_LOG2;

  int plane;
#if CONFIG_HIGHBITDEPTH
  if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
    int len = sizeof(uint16_t);
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    ASSIGN_ALIGNED_PTRS_HBD(pred_buf[0], cm->ncobmcaw_buf[0], MAX_SB_SQUARE,
                            len);
    ASSIGN_ALIGNED_PTRS_HBD(pred_buf[1], cm->ncobmcaw_buf[1], MAX_SB_SQUARE,
                            len);
    ASSIGN_ALIGNED_PTRS_HBD(pred_buf[2], cm->ncobmcaw_buf[2], MAX_SB_SQUARE,
                            len);
    ASSIGN_ALIGNED_PTRS_HBD(pred_buf[3], cm->ncobmcaw_buf[3], MAX_SB_SQUARE,
                            len);
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  } else {
#endif  // CONFIG_HIGHBITDEPTH
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    ASSIGN_ALIGNED_PTRS(pred_buf[0], cm->ncobmcaw_buf[0], MAX_SB_SQUARE);
    ASSIGN_ALIGNED_PTRS(pred_buf[1], cm->ncobmcaw_buf[1], MAX_SB_SQUARE);
    ASSIGN_ALIGNED_PTRS(pred_buf[2], cm->ncobmcaw_buf[2], MAX_SB_SQUARE);
    ASSIGN_ALIGNED_PTRS(pred_buf[3], cm->ncobmcaw_buf[3], MAX_SB_SQUARE);
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#if CONFIG_HIGHBITDEPTH
  }
#endif
  av1_get_ext_blk_preds(cm, xd, bsize, mi_row, mi_col, pred_buf, pred_stride);
  av1_get_ori_blk_pred(cm, xd, bsize, mi_row, mi_col, pred_buf[3], pred_stride);
  for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
    build_ncobmc_intrpl_pred(cm, xd, plane, pxl_row, pxl_col, bsize, pred_buf,
                             pred_stride, mode);
  }
}

static void av1_get_ncobmc_recon(AV1_COMMON *const cm, MACROBLOCKD *const xd,
                                 int bsize, const int mi_row, const int mi_col,
                                 const NCOBMC_MODE modes) {
  const int mi_width = mi_size_wide[bsize];
  const int mi_height = mi_size_high[bsize];

  assert(bsize >= BLOCK_8X8);

  reset_xd_boundary(xd, mi_row, mi_height, mi_col, mi_width, cm->mi_rows,
                    cm->mi_cols);
  get_ncobmc_recon(cm, xd, mi_row, mi_col, bsize, modes);
}

static void recon_ncobmc_intrpl_pred(AV1_COMMON *const cm,
                                     MACROBLOCKD *const xd, int mi_row,
                                     int mi_col, BLOCK_SIZE bsize) {
  MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
  const int mi_width = mi_size_wide[bsize];
  const int mi_height = mi_size_high[bsize];
  const int hbs = AOMMAX(mi_size_wide[bsize] / 2, mi_size_high[bsize] / 2);
  const BLOCK_SIZE sqr_blk = bsize_2_sqr_bsize[bsize];
  if (mi_width > mi_height) {
    // horizontal partition
    av1_get_ncobmc_recon(cm, xd, sqr_blk, mi_row, mi_col, mbmi->ncobmc_mode[0]);
    xd->mi += hbs;
    av1_get_ncobmc_recon(cm, xd, sqr_blk, mi_row, mi_col + hbs,
                         mbmi->ncobmc_mode[1]);
  } else if (mi_height > mi_width) {
    // vertical partition
    av1_get_ncobmc_recon(cm, xd, sqr_blk, mi_row, mi_col, mbmi->ncobmc_mode[0]);
    xd->mi += hbs * xd->mi_stride;
    av1_get_ncobmc_recon(cm, xd, sqr_blk, mi_row + hbs, mi_col,
                         mbmi->ncobmc_mode[1]);
  } else {
    av1_get_ncobmc_recon(cm, xd, sqr_blk, mi_row, mi_col, mbmi->ncobmc_mode[0]);
  }
  set_mode_info_offsets(cm, xd, mi_row, mi_col);
  // restore dst buffer and mode info
  av1_setup_dst_planes(xd->plane, bsize, get_frame_new_buffer(cm), mi_row,
                       mi_col);
}
#endif  // CONFIG_NCOBMC_ADAPT_WEIGHT

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static void decode_token_and_recon_block(AV1Decoder *const pbi,
                                         MACROBLOCKD *const xd, int mi_row,
                                         int mi_col, aom_reader *r,
                                         BLOCK_SIZE bsize) {
  AV1_COMMON *const cm = &pbi->common;
  const int bw = mi_size_wide[bsize];
  const int bh = mi_size_high[bsize];
  const int x_mis = AOMMIN(bw, cm->mi_cols - mi_col);
  const int y_mis = AOMMIN(bh, cm->mi_rows - mi_row);

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  set_offsets(cm, xd, bsize, mi_row, mi_col, bw, bh, x_mis, y_mis);
  MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
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#if CONFIG_CFL && CONFIG_CHROMA_SUB8X8
  CFL_CTX *const cfl = xd->cfl;
  cfl->is_chroma_reference = is_chroma_reference(
      mi_row, mi_col, bsize, cfl->subsampling_x, cfl->subsampling_y);
#endif  // CONFIG_CFL && CONFIG_CHROMA_SUB8X8
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  if (cm->delta_q_present_flag) {
    int i;
    for (i = 0; i < MAX_SEGMENTS; i++) {
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#if CONFIG_EXT_DELTA_Q
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      const int current_qindex =
          av1_get_qindex(&cm->seg, i, xd->current_qindex);
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#else
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      const int current_qindex = xd->current_qindex;
#endif  // CONFIG_EXT_DELTA_Q
      int j;
      for (j = 0; j < MAX_MB_PLANE; ++j) {
        const int dc_delta_q = j == 0 ? cm->y_dc_delta_q : cm->uv_dc_delta_q;
        const int ac_delta_q = j == 0 ? 0 : cm->uv_ac_delta_q;

        xd->plane[j].seg_dequant[i][0] =
            av1_dc_quant(current_qindex, dc_delta_q, cm->bit_depth);
        xd->plane[j].seg_dequant[i][1] =
            av1_ac_quant(current_qindex, ac_delta_q, cm->bit_depth);
      }
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    }
  }
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  if (mbmi->skip) av1_reset_skip_context(xd, mi_row, mi_col, bsize);
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#if CONFIG_COEF_INTERLEAVE
  {
    const struct macroblockd_plane *const pd_y = &xd->plane[0];
    const struct macroblockd_plane *const pd_c = &xd->plane[1];
    const TX_SIZE tx_log2_y = mbmi->tx_size;
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    const TX_SIZE tx_log2_c = av1_get_uv_tx_size(mbmi, pd_c);
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    const int tx_sz_y = (1 << tx_log2_y);
    const int tx_sz_c = (1 << tx_log2_c);
    const int num_4x4_w_y = pd_y->n4_w;
    const int num_4x4_h_y = pd_y->n4_h;
    const int num_4x4_w_c = pd_c->n4_w;
    const int num_4x4_h_c = pd_c->n4_h;
    const int max_4x4_w_y = get_max_4x4_size(num_4x4_w_y, xd->mb_to_right_edge,
                                             pd_y->subsampling_x);
    const int max_4x4_h_y = get_max_4x4_size(num_4x4_h_y, xd->mb_to_bottom_edge,
                                             pd_y->subsampling_y);
    const int max_4x4_w_c = get_max_4x4_size(num_4x4_w_c, xd->mb_to_right_edge,
                                             pd_c->subsampling_x);
    const int max_4x4_h_c = get_max_4x4_size(num_4x4_h_c, xd->mb_to_bottom_edge,
                                             pd_c->subsampling_y);

    // The max_4x4_w/h may be smaller than tx_sz under some corner cases,
    // i.e. when the SB is splitted by tile boundaries.
    const int tu_num_w_y = (max_4x4_w_y + tx_sz_y - 1) / tx_sz_y;
    const int tu_num_h_y = (max_4x4_h_y + tx_sz_y - 1) / tx_sz_y;
    const int tu_num_w_c = (max_4x4_w_c + tx_sz_c - 1) / tx_sz_c;
    const int tu_num_h_c = (max_4x4_h_c + tx_sz_c - 1) / tx_sz_c;
    const int tu_num_c = tu_num_w_c * tu_num_h_c;

    if (!is_inter_block(mbmi)) {
      int tu_idx_c = 0;
      int row_y, col_y, row_c, col_c;
      int plane;

      for (plane = 0; plane <= 1; ++plane) {
        if (mbmi->palette_mode_info.palette_size[plane])
          av1_decode_palette_tokens(xd, plane, r);
      }

      for (row_y = 0; row_y < tu_num_h_y; row_y++) {
        for (col_y = 0; col_y < tu_num_w_y; col_y++) {
          // luma
          predict_and_reconstruct_intra_block(
              cm, xd, r, mbmi, 0, row_y * tx_sz_y, col_y * tx_sz_y, tx_log2_y);
          // chroma
          if (tu_idx_c < tu_num_c) {
            row_c = (tu_idx_c / tu_num_w_c) * tx_sz_c;
            col_c = (tu_idx_c % tu_num_w_c) * tx_sz_c;
            predict_and_reconstruct_intra_block(cm, xd, r, mbmi, 1, row_c,
                                                col_c, tx_log2_c);
            predict_and_reconstruct_intra_block(cm, xd, r, mbmi, 2, row_c,
                                                col_c, tx_log2_c);
            tu_idx_c++;
          }
        }
      }

      // In 422 case, it's possilbe that Chroma has more TUs than Luma
      while (tu_idx_c < tu_num_c) {
        row_c = (tu_idx_c / tu_num_w_c) * tx_sz_c;
        col_c = (tu_idx_c % tu_num_w_c) * tx_sz_c;
        predict_and_reconstruct_intra_block(cm, xd, r, mbmi, 1, row_c, col_c,
                                            tx_log2_c);
        predict_and_reconstruct_intra_block(cm, xd, r, mbmi, 2, row_c, col_c,
                                            tx_log2_c);
        tu_idx_c++;
      }
    } else {
      // Prediction
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      av1_build_inter_predictors_sb(cm, xd, mi_row, mi_col, NULL,
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                                    AOMMAX(bsize, BLOCK_8X8));

      // Reconstruction
      if (!mbmi->skip) {
        int eobtotal = 0;
        int tu_idx_c = 0;
        int row_y, col_y, row_c, col_c;

        for (row_y = 0; row_y < tu_num_h_y; row_y++) {
          for (col_y = 0; col_y < tu_num_w_y; col_y++) {
            // luma
            eobtotal += reconstruct_inter_block(cm, xd, r, mbmi->segment_id, 0,
                                                row_y * tx_sz_y,
                                                col_y * tx_sz_y, tx_log2_y);
            // chroma
            if (tu_idx_c < tu_num_c) {
              row_c = (tu_idx_c / tu_num_w_c) * tx_sz_c;
              col_c = (tu_idx_c % tu_num_w_c) * tx_sz_c;
              eobtotal += reconstruct_inter_block(cm, xd, r, mbmi->segment_id,
                                                  1, row_c, col_c, tx_log2_c);
              eobtotal += reconstruct_inter_block(cm, xd, r, mbmi->segment_id,
                                                  2, row_c, col_c, tx_log2_c);
              tu_idx_c++;
            }
          }
        }

        // In 422 case, it's possilbe that Chroma has more TUs than Luma
        while (tu_idx_c < tu_num_c) {
          row_c = (tu_idx_c / tu_num_w_c) * tx_sz_c;
          col_c = (tu_idx_c % tu_num_w_c) * tx_sz_c;
          eobtotal += reconstruct_inter_block(cm, xd, r, mbmi->segment_id, 1,
                                              row_c, col_c, tx_log2_c);
          eobtotal += reconstruct_inter_block(cm, xd, r, mbmi->segment_id, 2,
                                              row_c, col_c, tx_log2_c);
          tu_idx_c++;
        }

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        // TODO(CONFIG_COEF_INTERLEAVE owners): bring eob == 0 corner case
        // into line with the defaut configuration
        if (bsize >= BLOCK_8X8 && eobtotal == 0) mbmi->skip = 1;
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      }
    }
  }
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#else  // CONFIG_COEF_INTERLEAVE
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  if (!is_inter_block(mbmi)) {
    int plane;
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    for (plane = 0; plane <= 1; ++plane) {
      if (mbmi->palette_mode_info.palette_size[plane])
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        av1_decode_palette_tokens(xd, plane, r);
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    }
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    for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
      const struct macroblockd_plane *const pd = &xd->plane[plane];
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      const TX_SIZE tx_size = av1_get_tx_size(plane, xd);
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      const int stepr = tx_size_high_unit[tx_size];
      const int stepc = tx_size_wide_unit[tx_size];
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#if CONFIG_CHROMA_SUB8X8
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      const BLOCK_SIZE plane_bsize =
          AOMMAX(BLOCK_4X4, get_plane_block_size(bsize, pd));
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#else
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      const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
#endif  // CONFIG_CHROMA_SUB8X8
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      int row, col;
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      const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane);
      const int max_blocks_high = max_block_high(xd, plane_bsize, plane);
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      if (!is_chroma_reference(mi_row, mi_col, bsize, pd->subsampling_x,
                               pd->subsampling_y))
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        continue;
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      int blk_row, blk_col;
      const BLOCK_SIZE max_unit_bsize = get_plane_block_size(BLOCK_64X64, pd);
      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) {
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        const int unit_height = AOMMIN(mu_blocks_high + row, max_blocks_high);
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        for (col = 0; col < max_blocks_wide; col += mu_blocks_wide) {
          const int unit_width = AOMMIN(mu_blocks_wide + col, max_blocks_wide);

          for (blk_row = row; blk_row < unit_height; blk_row += stepr)
            for (blk_col = col; blk_col < unit_width; blk_col += stepc)
              predict_and_reconstruct_intra_block(cm, xd, r, mbmi, plane,
                                                  blk_row, blk_col, tx_size);
        }
      }
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    }
  } else {
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    int ref;

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#if CONFIG_COMPOUND_SINGLEREF
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    for (ref = 0; ref < 1 + is_inter_anyref_comp_mode(mbmi->mode); ++ref)
#else
    for (ref = 0; ref < 1 + has_second_ref(mbmi); ++ref)
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#endif  // CONFIG_COMPOUND_SINGLEREF
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    {
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      const MV_REFERENCE_FRAME frame =
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#if CONFIG_COMPOUND_SINGLEREF
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          has_second_ref(mbmi) ? mbmi->ref_frame[ref] : mbmi->ref_frame[0];
#else
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          mbmi->ref_frame[ref];
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#endif  // CONFIG_COMPOUND_SINGLEREF
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      if (frame < LAST_FRAME) {
#if CONFIG_INTRABC
        assert(is_intrabc_block(mbmi));
        assert(frame == INTRA_FRAME);
        assert(ref == 0);
#else
        assert(0);
#endif  // CONFIG_INTRABC
      } else {
        RefBuffer *ref_buf = &cm->frame_refs[frame - LAST_FRAME];

        xd->block_refs[ref] = ref_buf;
        if ((!av1_is_valid_scale(&ref_buf->sf)))
          aom_internal_error(xd->error_info, AOM_CODEC_UNSUP_BITSTREAM,
                             "Reference frame has invalid dimensions");
        av1_setup_pre_planes(xd, ref, ref_buf->buf, mi_row, mi_col,
                             &ref_buf->sf);
      }
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    }
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    av1_build_inter_predictors_sb(cm, xd, mi_row, mi_col, NULL, bsize);
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#if CONFIG_MOTION_VAR
    if (mbmi->motion_mode == OBMC_CAUSAL) {
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#if CONFIG_NCOBMC
      av1_build_ncobmc_inter_predictors_sb(cm, xd, mi_row, mi_col);
#else
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      av1_build_obmc_inter_predictors_sb(cm, xd, mi_row, mi_col);
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#endif
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    }
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#endif  // CONFIG_MOTION_VAR
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#if CONFIG_NCOBMC_ADAPT_WEIGHT
    if (mbmi->motion_mode == NCOBMC_ADAPT_WEIGHT) {
      int plane;
      recon_ncobmc_intrpl_pred(cm, xd, mi_row, mi_col, bsize);
      for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
        get_pred_from_intrpl_buf(xd, mi_row, mi_col, bsize, plane);
      }
    }
#endif
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    // Reconstruction
    if (!mbmi->skip) {
      int eobtotal = 0;
      int plane;

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      for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
        const struct macroblockd_plane *const pd = &xd->plane[plane];
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#if CONFIG_CHROMA_SUB8X8
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        const BLOCK_SIZE plane_bsize =
            AOMMAX(BLOCK_4X4, get_plane_block_size(bsize, pd));
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#else
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        const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
#endif  // CONFIG_CHROMA_SUB8X8
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        const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane);
        const int max_blocks_high = max_block_high(xd, plane_bsize, plane);
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        int row, col;
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        if (!is_chroma_reference(mi_row, mi_col, bsize, pd->subsampling_x,
                                 pd->subsampling_y))
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          continue;

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        const BLOCK_SIZE max_unit_bsize = get_plane_block_size(BLOCK_64X64, pd);
        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);

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        const TX_SIZE max_tx_size = get_vartx_max_txsize(
            mbmi, plane_bsize, pd->subsampling_x || pd->subsampling_y);
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        const int bh_var_tx = tx_size_high_unit[max_tx_size];
        const int bw_var_tx = tx_size_wide_unit[max_tx_size];
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        int block = 0;
        int step =
            tx_size_wide_unit[max_tx_size] * tx_size_high_unit[max_tx_size];
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