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cdef.c (19521B)


      1 /*
      2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
      3 *
      4 * This source code is subject to the terms of the BSD 2 Clause License and
      5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
      6 * was not distributed with this source code in the LICENSE file, you can
      7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
      8 * Media Patent License 1.0 was not distributed with this source code in the
      9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
     10 */
     11 
     12 #include <assert.h>
     13 #include <stddef.h>
     14 #include <string.h>
     15 
     16 #include "config/aom_scale_rtcd.h"
     17 
     18 #include "aom/aom_integer.h"
     19 #include "aom_util/aom_pthread.h"
     20 #include "av1/common/av1_common_int.h"
     21 #include "av1/common/cdef.h"
     22 #include "av1/common/cdef_block.h"
     23 #include "av1/common/common.h"
     24 #include "av1/common/common_data.h"
     25 #include "av1/common/enums.h"
     26 #include "av1/common/reconinter.h"
     27 #include "av1/common/thread_common.h"
     28 
     29 static int is_8x8_block_skip(MB_MODE_INFO **grid, int mi_row, int mi_col,
     30                             int mi_stride) {
     31  MB_MODE_INFO **mbmi = grid + mi_row * mi_stride + mi_col;
     32  for (int r = 0; r < mi_size_high[BLOCK_8X8]; ++r, mbmi += mi_stride) {
     33    for (int c = 0; c < mi_size_wide[BLOCK_8X8]; ++c) {
     34      if (!mbmi[c]->skip_txfm) return 0;
     35    }
     36  }
     37 
     38  return 1;
     39 }
     40 
     41 int av1_cdef_compute_sb_list(const CommonModeInfoParams *const mi_params,
     42                             int mi_row, int mi_col, cdef_list *dlist,
     43                             BLOCK_SIZE bs) {
     44  MB_MODE_INFO **grid = mi_params->mi_grid_base;
     45  int maxc = mi_params->mi_cols - mi_col;
     46  int maxr = mi_params->mi_rows - mi_row;
     47 
     48  if (bs == BLOCK_128X128 || bs == BLOCK_128X64)
     49    maxc = AOMMIN(maxc, MI_SIZE_128X128);
     50  else
     51    maxc = AOMMIN(maxc, MI_SIZE_64X64);
     52  if (bs == BLOCK_128X128 || bs == BLOCK_64X128)
     53    maxr = AOMMIN(maxr, MI_SIZE_128X128);
     54  else
     55    maxr = AOMMIN(maxr, MI_SIZE_64X64);
     56 
     57  const int r_step = 2;  // mi_size_high[BLOCK_8X8]
     58  const int c_step = 2;  // mi_size_wide[BLOCK_8X8]
     59  const int r_shift = 1;
     60  const int c_shift = 1;
     61  int count = 0;
     62  for (int r = 0; r < maxr; r += r_step) {
     63    for (int c = 0; c < maxc; c += c_step) {
     64      if (!is_8x8_block_skip(grid, mi_row + r, mi_col + c,
     65                             mi_params->mi_stride)) {
     66        dlist[count].by = r >> r_shift;
     67        dlist[count].bx = c >> c_shift;
     68        count++;
     69      }
     70    }
     71  }
     72  return count;
     73 }
     74 
     75 void cdef_copy_rect8_8bit_to_16bit_c(uint16_t *dst, int dstride,
     76                                     const uint8_t *src, int sstride, int width,
     77                                     int height) {
     78  for (int i = 0; i < height; i++) {
     79    for (int j = 0; j < width; j++) {
     80      dst[i * dstride + j] = src[i * sstride + j];
     81    }
     82  }
     83 }
     84 
     85 #if CONFIG_AV1_HIGHBITDEPTH
     86 void cdef_copy_rect8_16bit_to_16bit_c(uint16_t *dst, int dstride,
     87                                      const uint16_t *src, int sstride,
     88                                      int width, int height) {
     89  for (int i = 0; i < height; i++) {
     90    for (int j = 0; j < width; j++) {
     91      dst[i * dstride + j] = src[i * sstride + j];
     92    }
     93  }
     94 }
     95 #endif  // CONFIG_AV1_HIGHBITDEPTH
     96 
     97 void av1_cdef_copy_sb8_16_lowbd(uint16_t *const dst, int dstride,
     98                                const uint8_t *src, int src_voffset,
     99                                int src_hoffset, int sstride, int vsize,
    100                                int hsize) {
    101  const uint8_t *base = &src[src_voffset * (ptrdiff_t)sstride + src_hoffset];
    102  cdef_copy_rect8_8bit_to_16bit(dst, dstride, base, sstride, hsize, vsize);
    103 }
    104 
    105 #if CONFIG_AV1_HIGHBITDEPTH
    106 void av1_cdef_copy_sb8_16_highbd(uint16_t *const dst, int dstride,
    107                                 const uint8_t *src, int src_voffset,
    108                                 int src_hoffset, int sstride, int vsize,
    109                                 int hsize) {
    110  const uint16_t *base =
    111      &CONVERT_TO_SHORTPTR(src)[src_voffset * (ptrdiff_t)sstride + src_hoffset];
    112  cdef_copy_rect8_16bit_to_16bit(dst, dstride, base, sstride, hsize, vsize);
    113 }
    114 #endif  // CONFIG_AV1_HIGHBITDEPTH
    115 
    116 void av1_cdef_copy_sb8_16(const AV1_COMMON *const cm, uint16_t *const dst,
    117                          int dstride, const uint8_t *src, int src_voffset,
    118                          int src_hoffset, int sstride, int vsize, int hsize) {
    119 #if CONFIG_AV1_HIGHBITDEPTH
    120  if (cm->seq_params->use_highbitdepth) {
    121    av1_cdef_copy_sb8_16_highbd(dst, dstride, src, src_voffset, src_hoffset,
    122                                sstride, vsize, hsize);
    123    return;
    124  }
    125 #else
    126  (void)cm;
    127 #endif  // CONFIG_AV1_HIGHBITDEPTH
    128  av1_cdef_copy_sb8_16_lowbd(dst, dstride, src, src_voffset, src_hoffset,
    129                             sstride, vsize, hsize);
    130 }
    131 
    132 static inline void copy_rect(uint16_t *dst, int dstride, const uint16_t *src,
    133                             int sstride, int v, int h) {
    134  for (int i = 0; i < v; i++) {
    135    for (int j = 0; j < h; j++) {
    136      dst[i * dstride + j] = src[i * sstride + j];
    137    }
    138  }
    139 }
    140 
    141 // Prepares intermediate input buffer for CDEF.
    142 // Inputs:
    143 //   cm: Pointer to common structure.
    144 //   fb_info: Pointer to the CDEF block-level parameter structure.
    145 //   colbuf: Left column buffer for CDEF.
    146 //   cdef_left: Left block is filtered or not.
    147 //   fbc, fbr: col and row index of a block.
    148 //   plane: plane index Y/CB/CR.
    149 // Returns:
    150 //   Nothing will be returned.
    151 static void cdef_prepare_fb(const AV1_COMMON *const cm, CdefBlockInfo *fb_info,
    152                            uint16_t **const colbuf, const int cdef_left,
    153                            int fbc, int fbr, int plane) {
    154  const CommonModeInfoParams *const mi_params = &cm->mi_params;
    155  uint16_t *src = fb_info->src;
    156  const int luma_stride =
    157      ALIGN_POWER_OF_TWO(mi_params->mi_cols << MI_SIZE_LOG2, 4);
    158  const int nvfb = (mi_params->mi_rows + MI_SIZE_64X64 - 1) / MI_SIZE_64X64;
    159  const int nhfb = (mi_params->mi_cols + MI_SIZE_64X64 - 1) / MI_SIZE_64X64;
    160  int cstart = 0;
    161  if (!cdef_left) cstart = -CDEF_HBORDER;
    162  int rend, cend;
    163  const int nhb =
    164      AOMMIN(MI_SIZE_64X64, mi_params->mi_cols - MI_SIZE_64X64 * fbc);
    165  const int nvb =
    166      AOMMIN(MI_SIZE_64X64, mi_params->mi_rows - MI_SIZE_64X64 * fbr);
    167  const int hsize = nhb << fb_info->mi_wide_l2;
    168  const int vsize = nvb << fb_info->mi_high_l2;
    169  const uint16_t *top_linebuf = fb_info->top_linebuf[plane];
    170  const uint16_t *bot_linebuf = fb_info->bot_linebuf[plane];
    171  const int bot_offset = (vsize + CDEF_VBORDER) * CDEF_BSTRIDE;
    172  const int stride =
    173      luma_stride >> (plane == AOM_PLANE_Y ? 0 : cm->seq_params->subsampling_x);
    174 
    175  if (fbc == nhfb - 1)
    176    cend = hsize;
    177  else
    178    cend = hsize + CDEF_HBORDER;
    179 
    180  if (fbr == nvfb - 1)
    181    rend = vsize;
    182  else
    183    rend = vsize + CDEF_VBORDER;
    184 
    185  /* Copy in the pixels we need from the current superblock for
    186  deringing.*/
    187  av1_cdef_copy_sb8_16(
    188      cm, &src[CDEF_VBORDER * CDEF_BSTRIDE + CDEF_HBORDER + cstart],
    189      CDEF_BSTRIDE, fb_info->dst, fb_info->roffset, fb_info->coffset + cstart,
    190      fb_info->dst_stride, vsize, cend - cstart);
    191 
    192  /* Copy in the pixels we need for the current superblock from bottom buffer.*/
    193  if (fbr < nvfb - 1) {
    194    copy_rect(&src[bot_offset + CDEF_HBORDER], CDEF_BSTRIDE,
    195              &bot_linebuf[fb_info->coffset], stride, CDEF_VBORDER, hsize);
    196  } else {
    197    fill_rect(&src[bot_offset + CDEF_HBORDER], CDEF_BSTRIDE, CDEF_VBORDER,
    198              hsize, CDEF_VERY_LARGE);
    199  }
    200  if (fbr < nvfb - 1 && fbc > 0) {
    201    copy_rect(&src[bot_offset], CDEF_BSTRIDE,
    202              &bot_linebuf[fb_info->coffset - CDEF_HBORDER], stride,
    203              CDEF_VBORDER, CDEF_HBORDER);
    204  } else {
    205    fill_rect(&src[bot_offset], CDEF_BSTRIDE, CDEF_VBORDER, CDEF_HBORDER,
    206              CDEF_VERY_LARGE);
    207  }
    208  if (fbr < nvfb - 1 && fbc < nhfb - 1) {
    209    copy_rect(&src[bot_offset + hsize + CDEF_HBORDER], CDEF_BSTRIDE,
    210              &bot_linebuf[fb_info->coffset + hsize], stride, CDEF_VBORDER,
    211              CDEF_HBORDER);
    212  } else {
    213    fill_rect(&src[bot_offset + hsize + CDEF_HBORDER], CDEF_BSTRIDE,
    214              CDEF_VBORDER, CDEF_HBORDER, CDEF_VERY_LARGE);
    215  }
    216 
    217  /* Copy in the pixels we need from the current superblock from top buffer.*/
    218  if (fbr > 0) {
    219    copy_rect(&src[CDEF_HBORDER], CDEF_BSTRIDE, &top_linebuf[fb_info->coffset],
    220              stride, CDEF_VBORDER, hsize);
    221  } else {
    222    fill_rect(&src[CDEF_HBORDER], CDEF_BSTRIDE, CDEF_VBORDER, hsize,
    223              CDEF_VERY_LARGE);
    224  }
    225  if (fbr > 0 && fbc > 0) {
    226    copy_rect(src, CDEF_BSTRIDE, &top_linebuf[fb_info->coffset - CDEF_HBORDER],
    227              stride, CDEF_VBORDER, CDEF_HBORDER);
    228  } else {
    229    fill_rect(src, CDEF_BSTRIDE, CDEF_VBORDER, CDEF_HBORDER, CDEF_VERY_LARGE);
    230  }
    231  if (fbr > 0 && fbc < nhfb - 1) {
    232    copy_rect(&src[hsize + CDEF_HBORDER], CDEF_BSTRIDE,
    233              &top_linebuf[fb_info->coffset + hsize], stride, CDEF_VBORDER,
    234              CDEF_HBORDER);
    235  } else {
    236    fill_rect(&src[hsize + CDEF_HBORDER], CDEF_BSTRIDE, CDEF_VBORDER,
    237              CDEF_HBORDER, CDEF_VERY_LARGE);
    238  }
    239  if (cdef_left) {
    240    /* If we deringed the superblock on the left then we need to copy in
    241    saved pixels. */
    242    copy_rect(src, CDEF_BSTRIDE, colbuf[plane], CDEF_HBORDER,
    243              rend + CDEF_VBORDER, CDEF_HBORDER);
    244  }
    245  /* Saving pixels in case we need to dering the superblock on the
    246  right. */
    247  copy_rect(colbuf[plane], CDEF_HBORDER, src + hsize, CDEF_BSTRIDE,
    248            rend + CDEF_VBORDER, CDEF_HBORDER);
    249 
    250  if (fb_info->frame_boundary[LEFT]) {
    251    fill_rect(src, CDEF_BSTRIDE, vsize + 2 * CDEF_VBORDER, CDEF_HBORDER,
    252              CDEF_VERY_LARGE);
    253  }
    254  if (fb_info->frame_boundary[RIGHT]) {
    255    fill_rect(&src[hsize + CDEF_HBORDER], CDEF_BSTRIDE,
    256              vsize + 2 * CDEF_VBORDER, CDEF_HBORDER, CDEF_VERY_LARGE);
    257  }
    258 }
    259 
    260 static inline void cdef_filter_fb(CdefBlockInfo *const fb_info, int plane,
    261                                  uint8_t use_highbitdepth) {
    262  ptrdiff_t offset =
    263      (ptrdiff_t)fb_info->dst_stride * fb_info->roffset + fb_info->coffset;
    264  if (use_highbitdepth) {
    265    av1_cdef_filter_fb(
    266        NULL, CONVERT_TO_SHORTPTR(fb_info->dst + offset), fb_info->dst_stride,
    267        &fb_info->src[CDEF_VBORDER * CDEF_BSTRIDE + CDEF_HBORDER],
    268        fb_info->xdec, fb_info->ydec, fb_info->dir, NULL, fb_info->var, plane,
    269        fb_info->dlist, fb_info->cdef_count, fb_info->level,
    270        fb_info->sec_strength, fb_info->damping, fb_info->coeff_shift);
    271  } else {
    272    av1_cdef_filter_fb(
    273        fb_info->dst + offset, NULL, fb_info->dst_stride,
    274        &fb_info->src[CDEF_VBORDER * CDEF_BSTRIDE + CDEF_HBORDER],
    275        fb_info->xdec, fb_info->ydec, fb_info->dir, NULL, fb_info->var, plane,
    276        fb_info->dlist, fb_info->cdef_count, fb_info->level,
    277        fb_info->sec_strength, fb_info->damping, fb_info->coeff_shift);
    278  }
    279 }
    280 
    281 // Initializes block-level parameters for CDEF.
    282 static inline void cdef_init_fb_col(const MACROBLOCKD *const xd,
    283                                    CdefBlockInfo *const fb_info, int *level,
    284                                    int *sec_strength, int fbc, int fbr,
    285                                    int plane) {
    286  const PLANE_TYPE plane_type = get_plane_type(plane);
    287  fb_info->level = level[plane_type];
    288  fb_info->sec_strength = sec_strength[plane_type];
    289  fb_info->dst = xd->plane[plane].dst.buf;
    290  fb_info->dst_stride = xd->plane[plane].dst.stride;
    291 
    292  fb_info->xdec = xd->plane[plane].subsampling_x;
    293  fb_info->ydec = xd->plane[plane].subsampling_y;
    294  fb_info->mi_wide_l2 = MI_SIZE_LOG2 - xd->plane[plane].subsampling_x;
    295  fb_info->mi_high_l2 = MI_SIZE_LOG2 - xd->plane[plane].subsampling_y;
    296  fb_info->roffset = MI_SIZE_64X64 * fbr << fb_info->mi_high_l2;
    297  fb_info->coffset = MI_SIZE_64X64 * fbc << fb_info->mi_wide_l2;
    298 }
    299 
    300 static void cdef_fb_col(const AV1_COMMON *const cm, const MACROBLOCKD *const xd,
    301                        CdefBlockInfo *const fb_info, uint16_t **const colbuf,
    302                        int *cdef_left, int fbc, int fbr) {
    303  const CommonModeInfoParams *const mi_params = &cm->mi_params;
    304  const int mbmi_cdef_strength =
    305      mi_params
    306          ->mi_grid_base[MI_SIZE_64X64 * fbr * mi_params->mi_stride +
    307                         MI_SIZE_64X64 * fbc]
    308          ->cdef_strength;
    309  const int num_planes = av1_num_planes(cm);
    310  int is_zero_level[PLANE_TYPES] = { 1, 1 };
    311  int level[PLANE_TYPES] = { 0 };
    312  int sec_strength[PLANE_TYPES] = { 0 };
    313  const CdefInfo *const cdef_info = &cm->cdef_info;
    314 
    315  if (mi_params->mi_grid_base[MI_SIZE_64X64 * fbr * mi_params->mi_stride +
    316                              MI_SIZE_64X64 * fbc] == NULL ||
    317      mbmi_cdef_strength == -1) {
    318    av1_zero_array(cdef_left, num_planes);
    319    return;
    320  }
    321 
    322  // Compute level and secondary strength for planes
    323  level[PLANE_TYPE_Y] =
    324      cdef_info->cdef_strengths[mbmi_cdef_strength] / CDEF_SEC_STRENGTHS;
    325  sec_strength[PLANE_TYPE_Y] =
    326      cdef_info->cdef_strengths[mbmi_cdef_strength] % CDEF_SEC_STRENGTHS;
    327  sec_strength[PLANE_TYPE_Y] += sec_strength[PLANE_TYPE_Y] == 3;
    328  is_zero_level[PLANE_TYPE_Y] =
    329      (level[PLANE_TYPE_Y] == 0) && (sec_strength[PLANE_TYPE_Y] == 0);
    330 
    331  if (num_planes > 1) {
    332    level[PLANE_TYPE_UV] =
    333        cdef_info->cdef_uv_strengths[mbmi_cdef_strength] / CDEF_SEC_STRENGTHS;
    334    sec_strength[PLANE_TYPE_UV] =
    335        cdef_info->cdef_uv_strengths[mbmi_cdef_strength] % CDEF_SEC_STRENGTHS;
    336    sec_strength[PLANE_TYPE_UV] += sec_strength[PLANE_TYPE_UV] == 3;
    337    is_zero_level[PLANE_TYPE_UV] =
    338        (level[PLANE_TYPE_UV] == 0) && (sec_strength[PLANE_TYPE_UV] == 0);
    339  }
    340 
    341  if (is_zero_level[PLANE_TYPE_Y] && is_zero_level[PLANE_TYPE_UV]) {
    342    av1_zero_array(cdef_left, num_planes);
    343    return;
    344  }
    345 
    346  fb_info->cdef_count = av1_cdef_compute_sb_list(mi_params, fbr * MI_SIZE_64X64,
    347                                                 fbc * MI_SIZE_64X64,
    348                                                 fb_info->dlist, BLOCK_64X64);
    349  if (!fb_info->cdef_count) {
    350    av1_zero_array(cdef_left, num_planes);
    351    return;
    352  }
    353 
    354  for (int plane = 0; plane < num_planes; plane++) {
    355    // Do not skip cdef filtering for luma plane as filter direction is
    356    // computed based on luma.
    357    if (plane && is_zero_level[get_plane_type(plane)]) {
    358      cdef_left[plane] = 0;
    359      continue;
    360    }
    361    cdef_init_fb_col(xd, fb_info, level, sec_strength, fbc, fbr, plane);
    362    cdef_prepare_fb(cm, fb_info, colbuf, cdef_left[plane], fbc, fbr, plane);
    363    cdef_filter_fb(fb_info, plane, cm->seq_params->use_highbitdepth);
    364    cdef_left[plane] = 1;
    365  }
    366 }
    367 
    368 // Initializes row-level parameters for CDEF frame.
    369 void av1_cdef_init_fb_row(const AV1_COMMON *const cm,
    370                          const MACROBLOCKD *const xd,
    371                          CdefBlockInfo *const fb_info,
    372                          uint16_t **const linebuf, uint16_t *const src,
    373                          struct AV1CdefSyncData *const cdef_sync, int fbr) {
    374  (void)cdef_sync;
    375  const int num_planes = av1_num_planes(cm);
    376  const int nvfb = (cm->mi_params.mi_rows + MI_SIZE_64X64 - 1) / MI_SIZE_64X64;
    377  const int luma_stride =
    378      ALIGN_POWER_OF_TWO(cm->mi_params.mi_cols << MI_SIZE_LOG2, 4);
    379  const bool ping_pong = fbr & 1;
    380  // for the current filter block, it's top left corner mi structure (mi_tl)
    381  // is first accessed to check whether the top and left boundaries are
    382  // frame boundaries. Then bottom-left and top-right mi structures are
    383  // accessed to check whether the bottom and right boundaries
    384  // (respectively) are frame boundaries.
    385  //
    386  // Note that we can't just check the bottom-right mi structure - eg. if
    387  // we're at the right-hand edge of the frame but not the bottom, then
    388  // the bottom-right mi is NULL but the bottom-left is not.
    389  fb_info->frame_boundary[TOP] = (MI_SIZE_64X64 * fbr == 0) ? 1 : 0;
    390  if (fbr != nvfb - 1)
    391    fb_info->frame_boundary[BOTTOM] =
    392        (MI_SIZE_64X64 * (fbr + 1) == cm->mi_params.mi_rows) ? 1 : 0;
    393  else
    394    fb_info->frame_boundary[BOTTOM] = 1;
    395 
    396  fb_info->src = src;
    397  fb_info->damping = cm->cdef_info.cdef_damping;
    398  fb_info->coeff_shift = AOMMAX(cm->seq_params->bit_depth - 8, 0);
    399  av1_zero(fb_info->dir);
    400  av1_zero(fb_info->var);
    401 
    402  for (int plane = 0; plane < num_planes; plane++) {
    403    const int mi_high_l2 = MI_SIZE_LOG2 - xd->plane[plane].subsampling_y;
    404    const int offset = MI_SIZE_64X64 * (fbr + 1) << mi_high_l2;
    405    const int stride = luma_stride >> xd->plane[plane].subsampling_x;
    406    // here ping-pong buffers are maintained for top linebuf
    407    // to avoid linebuf over-write by consecutive row.
    408    uint16_t *const top_linebuf =
    409        &linebuf[plane][ping_pong * CDEF_VBORDER * stride];
    410    fb_info->bot_linebuf[plane] = &linebuf[plane][(CDEF_VBORDER << 1) * stride];
    411 
    412    if (fbr != nvfb - 1)  // top line buffer copy
    413      av1_cdef_copy_sb8_16(cm, top_linebuf, stride, xd->plane[plane].dst.buf,
    414                           offset - CDEF_VBORDER, 0,
    415                           xd->plane[plane].dst.stride, CDEF_VBORDER, stride);
    416    fb_info->top_linebuf[plane] =
    417        &linebuf[plane][(!ping_pong) * CDEF_VBORDER * stride];
    418 
    419    if (fbr != nvfb - 1)  // bottom line buffer copy
    420      av1_cdef_copy_sb8_16(cm, fb_info->bot_linebuf[plane], stride,
    421                           xd->plane[plane].dst.buf, offset, 0,
    422                           xd->plane[plane].dst.stride, CDEF_VBORDER, stride);
    423  }
    424 }
    425 
    426 void av1_cdef_fb_row(const AV1_COMMON *const cm, MACROBLOCKD *xd,
    427                     uint16_t **const linebuf, uint16_t **const colbuf,
    428                     uint16_t *const src, int fbr,
    429                     cdef_init_fb_row_t cdef_init_fb_row_fn,
    430                     struct AV1CdefSyncData *const cdef_sync,
    431                     struct aom_internal_error_info *error_info) {
    432  // TODO(aomedia:3276): Pass error_info to the low-level functions as required
    433  // in future to handle error propagation.
    434  (void)error_info;
    435  CdefBlockInfo fb_info;
    436  int cdef_left[MAX_MB_PLANE] = { 1, 1, 1 };
    437  const int nhfb = (cm->mi_params.mi_cols + MI_SIZE_64X64 - 1) / MI_SIZE_64X64;
    438 
    439  cdef_init_fb_row_fn(cm, xd, &fb_info, linebuf, src, cdef_sync, fbr);
    440 #if CONFIG_MULTITHREAD
    441  if (cdef_sync && cm->cdef_info.allocated_num_workers > 1) {
    442    pthread_mutex_lock(cdef_sync->mutex_);
    443    const bool cdef_mt_exit = cdef_sync->cdef_mt_exit;
    444    pthread_mutex_unlock(cdef_sync->mutex_);
    445    // Exit in case any worker has encountered an error.
    446    if (cdef_mt_exit) return;
    447  }
    448 #endif
    449  for (int fbc = 0; fbc < nhfb; fbc++) {
    450    fb_info.frame_boundary[LEFT] = (MI_SIZE_64X64 * fbc == 0) ? 1 : 0;
    451    if (fbc != nhfb - 1)
    452      fb_info.frame_boundary[RIGHT] =
    453          (MI_SIZE_64X64 * (fbc + 1) == cm->mi_params.mi_cols) ? 1 : 0;
    454    else
    455      fb_info.frame_boundary[RIGHT] = 1;
    456    cdef_fb_col(cm, xd, &fb_info, colbuf, &cdef_left[0], fbc, fbr);
    457  }
    458 }
    459 
    460 // Perform CDEF on input frame.
    461 // Inputs:
    462 //   frame: Pointer to input frame buffer.
    463 //   cm: Pointer to common structure.
    464 //   xd: Pointer to common current coding block structure.
    465 // Returns:
    466 //   Nothing will be returned.
    467 void av1_cdef_frame(YV12_BUFFER_CONFIG *frame, AV1_COMMON *const cm,
    468                    MACROBLOCKD *xd, cdef_init_fb_row_t cdef_init_fb_row_fn) {
    469  const int num_planes = av1_num_planes(cm);
    470  const int nvfb = (cm->mi_params.mi_rows + MI_SIZE_64X64 - 1) / MI_SIZE_64X64;
    471 
    472  av1_setup_dst_planes(xd->plane, cm->seq_params->sb_size, frame, 0, 0, 0,
    473                       num_planes);
    474 
    475  for (int fbr = 0; fbr < nvfb; fbr++)
    476    av1_cdef_fb_row(cm, xd, cm->cdef_info.linebuf, cm->cdef_info.colbuf,
    477                    cm->cdef_info.srcbuf, fbr, cdef_init_fb_row_fn, NULL,
    478                    xd->error_info);
    479 }