/* * VVC parameter set parser * * Copyright (C) 2023 Nuo Mi * Copyright (C) 2022 Xu Mu * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavcodec/cbs_h266.h" #include "libavutil/imgutils.h" #include "libavcodec/refstruct.h" #include "vvc_data.h" #include "vvc_ps.h" #include "vvcdec.h" static int sps_map_pixel_format(VVCSPS *sps, void *log_ctx) { const H266RawSPS *r = sps->r; const AVPixFmtDescriptor *desc; switch (sps->bit_depth) { case 8: if (r->sps_chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY8; if (r->sps_chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P; if (r->sps_chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P; if (r->sps_chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P; break; case 10: if (r->sps_chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY10; if (r->sps_chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P10; if (r->sps_chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P10; if (r->sps_chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P10; break; case 12: if (r->sps_chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY12; if (r->sps_chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P12; if (r->sps_chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P12; if (r->sps_chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P12; break; default: av_log(log_ctx, AV_LOG_ERROR, "The following bit-depths are currently specified: 8, 10, 12 bits, " "chroma_format_idc is %d, depth is %d\n", r->sps_chroma_format_idc, sps->bit_depth); return AVERROR_INVALIDDATA; } desc = av_pix_fmt_desc_get(sps->pix_fmt); if (!desc) return AVERROR(EINVAL); sps->hshift[0] = sps->vshift[0] = 0; sps->hshift[2] = sps->hshift[1] = desc->log2_chroma_w; sps->vshift[2] = sps->vshift[1] = desc->log2_chroma_h; sps->pixel_shift = sps->bit_depth > 8; return 0; } static int sps_bit_depth(VVCSPS *sps, void *log_ctx) { const H266RawSPS *r = sps->r; sps->bit_depth = r->sps_bitdepth_minus8 + 8; sps->qp_bd_offset = 6 * (sps->bit_depth - 8); sps->log2_transform_range = r->sps_extended_precision_flag ? FFMAX(15, FFMIN(20, sps->bit_depth + 6)) : 15; return sps_map_pixel_format(sps, log_ctx); } static int sps_chroma_qp_table(VVCSPS *sps) { const H266RawSPS *r = sps->r; const int num_qp_tables = r->sps_same_qp_table_for_chroma_flag ? 1 : (r->sps_joint_cbcr_enabled_flag ? 3 : 2); for (int i = 0; i < num_qp_tables; i++) { int num_points_in_qp_table; int8_t qp_in[VVC_MAX_POINTS_IN_QP_TABLE], qp_out[VVC_MAX_POINTS_IN_QP_TABLE]; unsigned int delta_qp_in[VVC_MAX_POINTS_IN_QP_TABLE]; int off = sps->qp_bd_offset; num_points_in_qp_table = r->sps_num_points_in_qp_table_minus1[i] + 1; qp_out[0] = qp_in[0] = r->sps_qp_table_start_minus26[i] + 26; for (int j = 0; j < num_points_in_qp_table; j++ ) { delta_qp_in[j] = r->sps_delta_qp_in_val_minus1[i][j] + 1; qp_in[j+1] = qp_in[j] + delta_qp_in[j]; qp_out[j+1] = qp_out[j] + (r->sps_delta_qp_in_val_minus1[i][j] ^ r->sps_delta_qp_diff_val[i][j]); } sps->chroma_qp_table[i][qp_in[0] + off] = qp_out[0]; for (int k = qp_in[0] - 1 + off; k >= 0; k--) sps->chroma_qp_table[i][k] = av_clip(sps->chroma_qp_table[i][k+1]-1, -off, 63); for (int j = 0; j < num_points_in_qp_table; j++) { int sh = delta_qp_in[j] >> 1; for (int k = qp_in[j] + 1 + off, m = 1; k <= qp_in[j+1] + off; k++, m++) { sps->chroma_qp_table[i][k] = sps->chroma_qp_table[i][qp_in[j] + off] + ((qp_out[j+1] - qp_out[j]) * m + sh) / delta_qp_in[j]; } } for (int k = qp_in[num_points_in_qp_table] + 1 + off; k <= 63 + off; k++) sps->chroma_qp_table[i][k] = av_clip(sps->chroma_qp_table[i][k-1] + 1, -sps->qp_bd_offset, 63); } if (r->sps_same_qp_table_for_chroma_flag) { memcpy(&sps->chroma_qp_table[1], &sps->chroma_qp_table[0], sizeof(sps->chroma_qp_table[0])); memcpy(&sps->chroma_qp_table[2], &sps->chroma_qp_table[0], sizeof(sps->chroma_qp_table[0])); } return 0; } static void sps_poc(VVCSPS *sps) { sps->max_pic_order_cnt_lsb = 1 << (sps->r->sps_log2_max_pic_order_cnt_lsb_minus4 + 4); } static void sps_inter(VVCSPS *sps) { const H266RawSPS *r = sps->r; sps->max_num_merge_cand = 6 - r->sps_six_minus_max_num_merge_cand; sps->max_num_ibc_merge_cand = 6 - r->sps_six_minus_max_num_ibc_merge_cand; if (sps->r->sps_gpm_enabled_flag) { sps->max_num_gpm_merge_cand = 2; if (sps->max_num_merge_cand >= 3) sps->max_num_gpm_merge_cand = sps->max_num_merge_cand - r->sps_max_num_merge_cand_minus_max_num_gpm_cand; } sps->log2_parallel_merge_level = r->sps_log2_parallel_merge_level_minus2 + 2; } static void sps_partition_constraints(VVCSPS* sps) { const H266RawSPS *r = sps->r; sps->ctb_log2_size_y = r->sps_log2_ctu_size_minus5 + 5; sps->ctb_size_y = 1 << sps->ctb_log2_size_y; sps->min_cb_log2_size_y = r->sps_log2_min_luma_coding_block_size_minus2 + 2; sps->min_cb_size_y = 1 << sps->min_cb_log2_size_y; sps->max_tb_size_y = 1 << (r->sps_max_luma_transform_size_64_flag ? 6 : 5); sps->max_ts_size = 1 << (r->sps_log2_transform_skip_max_size_minus2 + 2); } static void sps_ladf(VVCSPS* sps) { const H266RawSPS *r = sps->r; if (r->sps_ladf_enabled_flag) { sps->num_ladf_intervals = r->sps_num_ladf_intervals_minus2 + 2; sps->ladf_interval_lower_bound[0] = 0; for (int i = 0; i < sps->num_ladf_intervals - 1; i++) { sps->ladf_interval_lower_bound[i + 1] = sps->ladf_interval_lower_bound[i] + r->sps_ladf_delta_threshold_minus1[i] + 1; } } } static int sps_derive(VVCSPS *sps, void *log_ctx) { int ret; const H266RawSPS *r = sps->r; ret = sps_bit_depth(sps, log_ctx); if (ret < 0) return ret; sps_poc(sps); sps_inter(sps); sps_partition_constraints(sps); sps_ladf(sps); if (r->sps_chroma_format_idc != 0) sps_chroma_qp_table(sps); return 0; } static void sps_free(FFRefStructOpaque opaque, void *obj) { VVCSPS *sps = obj; ff_refstruct_unref(&sps->r); } static const VVCSPS *sps_alloc(const H266RawSPS *rsps, void *log_ctx) { int ret; VVCSPS *sps = ff_refstruct_alloc_ext(sizeof(*sps), 0, NULL, sps_free); if (!sps) return NULL; ff_refstruct_replace(&sps->r, rsps); ret = sps_derive(sps, log_ctx); if (ret < 0) goto fail; return sps; fail: ff_refstruct_unref(&sps); return NULL; } static int decode_sps(VVCParamSets *ps, const H266RawSPS *rsps, void *log_ctx) { const int sps_id = rsps->sps_seq_parameter_set_id; const VVCSPS *old_sps = ps->sps_list[sps_id]; const VVCSPS *sps; if (old_sps && old_sps->r == rsps) return 0; sps = sps_alloc(rsps, log_ctx); if (!sps) return AVERROR(ENOMEM); ff_refstruct_unref(&ps->sps_list[sps_id]); ps->sps_list[sps_id] = sps; return 0; } static void pps_chroma_qp_offset(VVCPPS *pps) { pps->chroma_qp_offset[CB - 1] = pps->r->pps_cb_qp_offset; pps->chroma_qp_offset[CR - 1] = pps->r->pps_cr_qp_offset; pps->chroma_qp_offset[JCBCR - 1]= pps->r->pps_joint_cbcr_qp_offset_value; for (int i = 0; i < 6; i++) { pps->chroma_qp_offset_list[i][CB - 1] = pps->r->pps_cb_qp_offset_list[i]; pps->chroma_qp_offset_list[i][CR - 1] = pps->r->pps_cr_qp_offset_list[i]; pps->chroma_qp_offset_list[i][JCBCR - 1]= pps->r->pps_joint_cbcr_qp_offset_list[i]; } } static void pps_width_height(VVCPPS *pps, const VVCSPS *sps) { const H266RawPPS *r = pps->r; pps->width = r->pps_pic_width_in_luma_samples; pps->height = r->pps_pic_height_in_luma_samples; pps->ctb_width = AV_CEIL_RSHIFT(pps->width, sps->ctb_log2_size_y); pps->ctb_height = AV_CEIL_RSHIFT(pps->height, sps->ctb_log2_size_y); pps->ctb_count = pps->ctb_width * pps->ctb_height; pps->min_cb_width = pps->width >> sps->min_cb_log2_size_y; pps->min_cb_height = pps->height >> sps->min_cb_log2_size_y; pps->min_pu_width = pps->width >> MIN_PU_LOG2; pps->min_pu_height = pps->height >> MIN_PU_LOG2; pps->min_tu_width = pps->width >> MIN_TU_LOG2; pps->min_tu_height = pps->height >> MIN_TU_LOG2; pps->width32 = AV_CEIL_RSHIFT(pps->width, 5); pps->height32 = AV_CEIL_RSHIFT(pps->height, 5); pps->width64 = AV_CEIL_RSHIFT(pps->width, 6); pps->height64 = AV_CEIL_RSHIFT(pps->height, 6); } static int pps_bd(VVCPPS *pps) { const H266RawPPS *r = pps->r; pps->col_bd = av_calloc(r->num_tile_columns + 1, sizeof(*pps->col_bd)); pps->row_bd = av_calloc(r->num_tile_rows + 1, sizeof(*pps->row_bd)); pps->ctb_to_col_bd = av_calloc(pps->ctb_width + 1, sizeof(*pps->ctb_to_col_bd)); pps->ctb_to_row_bd = av_calloc(pps->ctb_height + 1, sizeof(*pps->ctb_to_col_bd)); if (!pps->col_bd || !pps->row_bd || !pps->ctb_to_col_bd || !pps->ctb_to_row_bd) return AVERROR(ENOMEM); for (int i = 0, j = 0; i < r->num_tile_columns; i++) { pps->col_bd[i] = j; j += r->col_width_val[i]; for (int k = pps->col_bd[i]; k < j; k++) pps->ctb_to_col_bd[k] = pps->col_bd[i]; } for (int i = 0, j = 0; i < r->num_tile_rows; i++) { pps->row_bd[i] = j; j += r->row_height_val[i]; for (int k = pps->row_bd[i]; k < j; k++) pps->ctb_to_row_bd[k] = pps->row_bd[i]; } return 0; } static int next_tile_idx(int tile_idx, const int i, const H266RawPPS *r) { if (r->pps_tile_idx_delta_present_flag) { tile_idx += r->pps_tile_idx_delta_val[i]; } else { tile_idx += r->pps_slice_width_in_tiles_minus1[i] + 1; if (tile_idx % r->num_tile_columns == 0) tile_idx += (r->pps_slice_height_in_tiles_minus1[i]) * r->num_tile_columns; } return tile_idx; } static void tile_xy(int *tile_x, int *tile_y, const int tile_idx, const VVCPPS *pps) { *tile_x = tile_idx % pps->r->num_tile_columns; *tile_y = tile_idx / pps->r->num_tile_columns; } static void ctu_xy(int *ctu_x, int *ctu_y, const int tile_x, const int tile_y, const VVCPPS *pps) { *ctu_x = pps->col_bd[tile_x]; *ctu_y = pps->row_bd[tile_y]; } static int ctu_rs(const int ctu_x, const int ctu_y, const VVCPPS *pps) { return pps->ctb_width * ctu_y + ctu_x; } static int pps_add_ctus(VVCPPS *pps, int *off, const int ctu_x, const int ctu_y, const int w, const int h) { int start = *off; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { pps->ctb_addr_in_slice[*off] = ctu_rs(ctu_x + x, ctu_y + y, pps); (*off)++; } } return *off - start; } static int pps_one_tile_slices(VVCPPS *pps, const int tile_idx, int i, int *off) { const H266RawPPS *r = pps->r; int ctu_x, ctu_y, ctu_y_end, tile_x, tile_y; tile_xy(&tile_x, &tile_y, tile_idx, pps); ctu_xy(&ctu_x, &ctu_y, tile_x, tile_y, pps); ctu_y_end = ctu_y + r->row_height_val[tile_y]; while (ctu_y < ctu_y_end) { pps->slice_start_offset[i] = *off; pps->num_ctus_in_slice[i] = pps_add_ctus(pps, off, ctu_x, ctu_y, r->col_width_val[tile_x], r->slice_height_in_ctus[i]); ctu_y += r->slice_height_in_ctus[i++]; } i--; return i; } static void pps_multi_tiles_slice(VVCPPS *pps, const int tile_idx, const int i, int *off) { const H266RawPPS *r = pps->r; int ctu_x, ctu_y,tile_x, tile_y; tile_xy(&tile_x, &tile_y, tile_idx, pps); pps->slice_start_offset[i] = *off; pps->num_ctus_in_slice[i] = 0; for (int ty = tile_y; ty <= tile_y + r->pps_slice_height_in_tiles_minus1[i]; ty++) { for (int tx = tile_x; tx <= tile_x + r->pps_slice_width_in_tiles_minus1[i]; tx++) { ctu_xy(&ctu_x, &ctu_y, tx, ty, pps); pps->num_ctus_in_slice[i] += pps_add_ctus(pps, off, ctu_x, ctu_y, r->col_width_val[tx], r->row_height_val[ty]); } } } static void pps_rect_slice(VVCPPS* pps) { const H266RawPPS* r = pps->r; int tile_idx = 0, off = 0; for (int i = 0; i < r->pps_num_slices_in_pic_minus1 + 1; i++) { if (!r->pps_slice_width_in_tiles_minus1[i] && !r->pps_slice_height_in_tiles_minus1[i]) { i = pps_one_tile_slices(pps, tile_idx, i, &off); } else { pps_multi_tiles_slice(pps, tile_idx, i, &off); } tile_idx = next_tile_idx(tile_idx, i, r); } } static void pps_no_rect_slice(VVCPPS* pps) { const H266RawPPS* r = pps->r; int ctu_x, ctu_y, off = 0; for (int tile_y = 0; tile_y < r->num_tile_rows; tile_y++) { for (int tile_x = 0; tile_x < r->num_tile_columns; tile_x++) { ctu_xy(&ctu_x, &ctu_y, tile_x, tile_y, pps); pps_add_ctus(pps, &off, ctu_x, ctu_y, r->col_width_val[tile_x], r->row_height_val[tile_y]); } } } static int pps_slice_map(VVCPPS *pps) { pps->ctb_addr_in_slice = av_calloc(pps->ctb_count, sizeof(*pps->ctb_addr_in_slice)); if (!pps->ctb_addr_in_slice) return AVERROR(ENOMEM); if (pps->r->pps_rect_slice_flag) pps_rect_slice(pps); else pps_no_rect_slice(pps); return 0; } static void pps_ref_wraparound_offset(VVCPPS *pps, const VVCSPS *sps) { const H266RawPPS *r = pps->r; if (r->pps_ref_wraparound_enabled_flag) pps->ref_wraparound_offset = (pps->width / sps->min_cb_size_y) - r->pps_pic_width_minus_wraparound_offset; } static int pps_derive(VVCPPS *pps, const VVCSPS *sps) { int ret; pps_chroma_qp_offset(pps); pps_width_height(pps, sps); ret = pps_bd(pps); if (ret < 0) return ret; ret = pps_slice_map(pps); if (ret < 0) return ret; pps_ref_wraparound_offset(pps, sps); return 0; } static void pps_free(FFRefStructOpaque opaque, void *obj) { VVCPPS *pps = obj; ff_refstruct_unref(&pps->r); av_freep(&pps->col_bd); av_freep(&pps->row_bd); av_freep(&pps->ctb_to_col_bd); av_freep(&pps->ctb_to_row_bd); av_freep(&pps->ctb_addr_in_slice); } static const VVCPPS *pps_alloc(const H266RawPPS *rpps, const VVCSPS *sps) { int ret; VVCPPS *pps = ff_refstruct_alloc_ext(sizeof(*pps), 0, NULL, pps_free); if (!pps) return NULL; ff_refstruct_replace(&pps->r, rpps); ret = pps_derive(pps, sps); if (ret < 0) goto fail; return pps; fail: ff_refstruct_unref(&pps); return NULL; } static int decode_pps(VVCParamSets *ps, const H266RawPPS *rpps) { int ret = 0; const int pps_id = rpps->pps_pic_parameter_set_id; const int sps_id = rpps->pps_seq_parameter_set_id; const VVCPPS *old_pps = ps->pps_list[pps_id]; const VVCPPS *pps; if (old_pps && old_pps->r == rpps) return 0; pps = pps_alloc(rpps, ps->sps_list[sps_id]); if (!pps) return AVERROR(ENOMEM); ff_refstruct_unref(&ps->pps_list[pps_id]); ps->pps_list[pps_id] = pps; return ret; } static int decode_ps(VVCParamSets *ps, const CodedBitstreamH266Context *h266, void *log_ctx) { const H266RawPictureHeader *ph = h266->ph; const H266RawPPS *rpps; const H266RawSPS *rsps; int ret; if (!ph) return AVERROR_INVALIDDATA; rpps = h266->pps[ph->ph_pic_parameter_set_id]; if (!rpps) return AVERROR_INVALIDDATA; rsps = h266->sps[rpps->pps_seq_parameter_set_id]; if (!rsps) return AVERROR_INVALIDDATA; ret = decode_sps(ps, rsps, log_ctx); if (ret < 0) return ret; ret = decode_pps(ps, rpps); if (ret < 0) return ret; return 0; } #define WEIGHT_TABLE(x) \ w->nb_weights[L##x] = r->num_weights_l##x; \ for (int i = 0; i < w->nb_weights[L##x]; i++) { \ w->weight_flag[L##x][LUMA][i] = r->luma_weight_l##x##_flag[i]; \ w->weight_flag[L##x][CHROMA][i] = r->chroma_weight_l##x##_flag[i]; \ w->weight[L##x][LUMA][i] = denom[LUMA] + r->delta_luma_weight_l##x[i]; \ w->offset[L##x][LUMA][i] = r->luma_offset_l##x[i]; \ for (int j = CB; j <= CR; j++) { \ w->weight[L##x][j][i] = denom[CHROMA] + r->delta_chroma_weight_l##x[i][j - 1]; \ w->offset[L##x][j][i] = 128 + r->delta_chroma_offset_l##x[i][j - 1]; \ w->offset[L##x][j][i] -= (128 * w->weight[L##x][j][i]) >> w->log2_denom[CHROMA]; \ w->offset[L##x][j][i] = av_clip_intp2(w->offset[L##x][j][i], 7); \ } \ } \ static void pred_weight_table(PredWeightTable *w, const H266RawPredWeightTable *r) { int denom[2]; w->log2_denom[LUMA] = r->luma_log2_weight_denom; w->log2_denom[CHROMA] = w->log2_denom[LUMA] + r->delta_chroma_log2_weight_denom; denom[LUMA] = 1 << w->log2_denom[LUMA]; denom[CHROMA] = 1 << w->log2_denom[CHROMA]; WEIGHT_TABLE(0) WEIGHT_TABLE(1) } // 8.3.1 Decoding process for picture order count static int ph_compute_poc(const H266RawPictureHeader *ph, const H266RawSPS *sps, const int poc_tid0, const int is_clvss) { const int max_poc_lsb = 1 << (sps->sps_log2_max_pic_order_cnt_lsb_minus4 + 4); const int prev_poc_lsb = poc_tid0 % max_poc_lsb; const int prev_poc_msb = poc_tid0 - prev_poc_lsb; const int poc_lsb = ph->ph_pic_order_cnt_lsb; int poc_msb; if (ph->ph_poc_msb_cycle_present_flag) { poc_msb = ph->ph_poc_msb_cycle_val * max_poc_lsb; } else if (is_clvss) { poc_msb = 0; } else { if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2) poc_msb = prev_poc_msb + max_poc_lsb; else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2) poc_msb = prev_poc_msb - max_poc_lsb; else poc_msb = prev_poc_msb; } return poc_msb + poc_lsb; } static av_always_inline uint16_t lmcs_derive_lut_sample(uint16_t sample, uint16_t *pivot1, uint16_t *pivot2, uint16_t *scale_coeff, const int idx, const int max) { const int lut_sample = pivot1[idx] + ((scale_coeff[idx] * (sample - pivot2[idx]) + (1<< 10)) >> 11); return av_clip(lut_sample, 0, max - 1); } //8.8.2.2 Inverse mapping process for a luma sample static int lmcs_derive_lut(VVCLMCS *lmcs, const H266RawAPS *rlmcs, const H266RawSPS *sps) { const int bit_depth = (sps->sps_bitdepth_minus8 + 8); const int max = (1 << bit_depth); const int org_cw = max / LMCS_MAX_BIN_SIZE; const int shift = av_log2(org_cw); const int off = 1 << (shift - 1); int cw[LMCS_MAX_BIN_SIZE]; uint16_t input_pivot[LMCS_MAX_BIN_SIZE]; uint16_t scale_coeff[LMCS_MAX_BIN_SIZE]; uint16_t inv_scale_coeff[LMCS_MAX_BIN_SIZE]; int i, delta_crs; if (bit_depth > LMCS_MAX_BIT_DEPTH) return AVERROR_PATCHWELCOME; if (!rlmcs) return AVERROR_INVALIDDATA; lmcs->min_bin_idx = rlmcs->lmcs_min_bin_idx; lmcs->max_bin_idx = LMCS_MAX_BIN_SIZE - 1 - rlmcs->lmcs_min_bin_idx; memset(cw, 0, sizeof(cw)); for (int i = lmcs->min_bin_idx; i <= lmcs->max_bin_idx; i++) cw[i] = org_cw + (1 - 2 * rlmcs->lmcs_delta_sign_cw_flag[i]) * rlmcs->lmcs_delta_abs_cw[i]; delta_crs = (1 - 2 * rlmcs->lmcs_delta_sign_crs_flag) * rlmcs->lmcs_delta_abs_crs; lmcs->pivot[0] = 0; for (i = 0; i < LMCS_MAX_BIN_SIZE; i++) { input_pivot[i] = i * org_cw; lmcs->pivot[i + 1] = lmcs->pivot[i] + cw[i]; scale_coeff[i] = (cw[i] * (1 << 11) + off) >> shift; if (cw[i] == 0) { inv_scale_coeff[i] = 0; lmcs->chroma_scale_coeff[i] = (1 << 11); } else { inv_scale_coeff[i] = org_cw * (1 << 11) / cw[i]; lmcs->chroma_scale_coeff[i] = org_cw * (1 << 11) / (cw[i] + delta_crs); } } //derive lmcs_fwd_lut for (uint16_t sample = 0; sample < max; sample++) { const int idx_y = sample / org_cw; const uint16_t fwd_sample = lmcs_derive_lut_sample(sample, lmcs->pivot, input_pivot, scale_coeff, idx_y, max); if (bit_depth > 8) lmcs->fwd_lut.u16[sample] = fwd_sample; else lmcs->fwd_lut.u8 [sample] = fwd_sample; } //derive lmcs_inv_lut i = lmcs->min_bin_idx; for (uint16_t sample = 0; sample < max; sample++) { uint16_t inv_sample; while (i <= lmcs->max_bin_idx && sample >= lmcs->pivot[i + 1]) i++; inv_sample = lmcs_derive_lut_sample(sample, input_pivot, lmcs->pivot, inv_scale_coeff, i, max); if (bit_depth > 8) lmcs->inv_lut.u16[sample] = inv_sample; else lmcs->inv_lut.u8 [sample] = inv_sample; } return 0; } static int ph_max_num_subblock_merge_cand(const H266RawSPS *sps, const H266RawPictureHeader *ph) { if (sps->sps_affine_enabled_flag) return 5 - sps->sps_five_minus_max_num_subblock_merge_cand; return sps->sps_sbtmvp_enabled_flag && ph->ph_temporal_mvp_enabled_flag; } static int ph_derive(VVCPH *ph, const H266RawSPS *sps, const H266RawPPS *pps, const int poc_tid0, const int is_clvss) { ph->max_num_subblock_merge_cand = ph_max_num_subblock_merge_cand(sps, ph->r); ph->poc = ph_compute_poc(ph->r, sps, poc_tid0, is_clvss); if (pps->pps_wp_info_in_ph_flag) pred_weight_table(&ph->pwt, &ph->r->ph_pred_weight_table); return 0; } static int decode_ph(VVCFrameParamSets *fps, const H266RawPictureHeader *rph, void *rph_ref, const int poc_tid0, const int is_clvss) { int ret; VVCPH *ph = &fps->ph; const H266RawSPS *sps = fps->sps->r; const H266RawPPS *pps = fps->pps->r; ph->r = rph; ff_refstruct_replace(&ph->rref, rph_ref); ret = ph_derive(ph, sps, pps, poc_tid0, is_clvss); if (ret < 0) return ret; return 0; } static int decode_frame_ps(VVCFrameParamSets *fps, const VVCParamSets *ps, const CodedBitstreamH266Context *h266, const int poc_tid0, const int is_clvss) { const H266RawPictureHeader *ph = h266->ph; const H266RawPPS *rpps; int ret; if (!ph) return AVERROR_INVALIDDATA; rpps = h266->pps[ph->ph_pic_parameter_set_id]; if (!rpps) return AVERROR_INVALIDDATA; ff_refstruct_replace(&fps->sps, ps->sps_list[rpps->pps_seq_parameter_set_id]); ff_refstruct_replace(&fps->pps, ps->pps_list[rpps->pps_pic_parameter_set_id]); ret = decode_ph(fps, ph, h266->ph_ref, poc_tid0, is_clvss); if (ret < 0) return ret; if (ph->ph_explicit_scaling_list_enabled_flag) ff_refstruct_replace(&fps->sl, ps->scaling_list[ph->ph_scaling_list_aps_id]); if (ph->ph_lmcs_enabled_flag) { ret = lmcs_derive_lut(&fps->lmcs, ps->lmcs_list[ph->ph_lmcs_aps_id], fps->sps->r); if (ret < 0) return ret; } for (int i = 0; i < FF_ARRAY_ELEMS(fps->alf_list); i++) ff_refstruct_replace(&fps->alf_list[i], ps->alf_list[i]); return 0; } static void decode_recovery_flag(VVCContext *s) { if (IS_IDR(s)) s->no_output_before_recovery_flag = 0; else if (IS_CRA(s) || IS_GDR(s)) s->no_output_before_recovery_flag = s->last_eos; } static void decode_recovery_poc(VVCContext *s, const VVCPH *ph) { if (s->no_output_before_recovery_flag) { if (IS_GDR(s)) s->gdr_recovery_point_poc = ph->poc + ph->r->ph_recovery_poc_cnt; if (!GDR_IS_RECOVERED(s) && s->gdr_recovery_point_poc <= ph->poc) GDR_SET_RECOVERED(s); } } int ff_vvc_decode_frame_ps(VVCFrameParamSets *fps, struct VVCContext *s) { int ret = 0; VVCParamSets *ps = &s->ps; const CodedBitstreamH266Context *h266 = s->cbc->priv_data; ret = decode_ps(ps, h266, s->avctx); if (ret < 0) return ret; decode_recovery_flag(s); ret = decode_frame_ps(fps, ps, h266, s->poc_tid0, IS_CLVSS(s)); decode_recovery_poc(s, &fps->ph); return ret; } void ff_vvc_frame_ps_free(VVCFrameParamSets *fps) { ff_refstruct_unref(&fps->sps); ff_refstruct_unref(&fps->pps); ff_refstruct_unref(&fps->ph.rref); ff_refstruct_unref(&fps->sl); for (int i = 0; i < FF_ARRAY_ELEMS(fps->alf_list); i++) ff_refstruct_unref(&fps->alf_list[i]); } void ff_vvc_ps_uninit(VVCParamSets *ps) { for (int i = 0; i < FF_ARRAY_ELEMS(ps->scaling_list); i++) ff_refstruct_unref(&ps->scaling_list[i]); for (int i = 0; i < FF_ARRAY_ELEMS(ps->lmcs_list); i++) ff_refstruct_unref(&ps->lmcs_list[i]); for (int i = 0; i < FF_ARRAY_ELEMS(ps->alf_list); i++) ff_refstruct_unref(&ps->alf_list[i]); for (int i = 0; i < FF_ARRAY_ELEMS(ps->sps_list); i++) ff_refstruct_unref(&ps->sps_list[i]); for (int i = 0; i < FF_ARRAY_ELEMS(ps->pps_list); i++) ff_refstruct_unref(&ps->pps_list[i]); } static void alf_coeff(int16_t *coeff, const uint8_t *abs, const uint8_t *sign, const int size) { for (int i = 0; i < size; i++) coeff[i] = (1 - 2 * sign[i]) * abs[i]; } static void alf_coeff_cc(int16_t *coeff, const uint8_t *mapped_abs, const uint8_t *sign) { for (int i = 0; i < ALF_NUM_COEFF_CC; i++) { int c = mapped_abs[i]; if (c) c = (1 - 2 * sign[i]) * (1 << (c - 1)); coeff[i] = c; } } static void alf_luma(VVCALF *alf, const H266RawAPS *aps) { if (!aps->alf_luma_filter_signal_flag) return; for (int i = 0; i < ALF_NUM_FILTERS_LUMA; i++) { const int ref = aps->alf_luma_coeff_delta_idx[i]; const uint8_t *abs = aps->alf_luma_coeff_abs[ref]; const uint8_t *sign = aps->alf_luma_coeff_sign[ref]; alf_coeff(alf->luma_coeff[i], abs, sign, ALF_NUM_COEFF_LUMA); memcpy(alf->luma_clip_idx[i], aps->alf_luma_clip_idx[ref], sizeof(alf->luma_clip_idx[i])); } } static void alf_chroma(VVCALF *alf, const H266RawAPS *aps) { if (!aps->alf_chroma_filter_signal_flag) return; alf->num_chroma_filters = aps->alf_chroma_num_alt_filters_minus1 + 1; for (int i = 0; i < alf->num_chroma_filters; i++) { const uint8_t *abs = aps->alf_chroma_coeff_abs[i]; const uint8_t *sign = aps->alf_chroma_coeff_sign[i]; alf_coeff(alf->chroma_coeff[i], abs, sign, ALF_NUM_COEFF_CHROMA); memcpy(alf->chroma_clip_idx[i], aps->alf_chroma_clip_idx[i], sizeof(alf->chroma_clip_idx[i])); } } static void alf_cc(VVCALF *alf, const H266RawAPS *aps) { const uint8_t (*abs[])[ALF_NUM_COEFF_CC] = { aps->alf_cc_cb_mapped_coeff_abs, aps->alf_cc_cr_mapped_coeff_abs }; const uint8_t (*sign[])[ALF_NUM_COEFF_CC] = {aps->alf_cc_cb_coeff_sign, aps->alf_cc_cr_coeff_sign }; const int signaled[] = { aps->alf_cc_cb_filter_signal_flag, aps->alf_cc_cr_filter_signal_flag}; alf->num_cc_filters[0] = aps->alf_cc_cb_filters_signalled_minus1 + 1; alf->num_cc_filters[1] = aps->alf_cc_cr_filters_signalled_minus1 + 1; for (int idx = 0; idx < 2; idx++) { if (signaled[idx]) { for (int i = 0; i < alf->num_cc_filters[idx]; i++) alf_coeff_cc(alf->cc_coeff[idx][i], abs[idx][i], sign[idx][i]); } } } static void alf_derive(VVCALF *alf, const H266RawAPS *aps) { alf_luma(alf, aps); alf_chroma(alf, aps); alf_cc(alf, aps); } static int aps_decode_alf(const VVCALF **alf, const H266RawAPS *aps) { VVCALF *a = ff_refstruct_allocz(sizeof(*a)); if (!a) return AVERROR(ENOMEM); alf_derive(a, aps); ff_refstruct_replace(alf, a); ff_refstruct_unref(&a); return 0; } static int is_luma_list(const int id) { return id % VVC_MAX_SAMPLE_ARRAYS == SL_START_4x4 || id == SL_START_64x64 + 1; } static int derive_matrix_size(const int id) { return id < SL_START_4x4 ? 2 : (id < SL_START_8x8 ? 4 : 8); } // 7.4.3.20 Scaling list data semantics static void scaling_derive(VVCScalingList *sl, const H266RawAPS *aps) { for (int id = 0; id < SL_MAX_ID; id++) { const int matrix_size = derive_matrix_size(id); const int log2_size = av_log2(matrix_size); const int list_size = matrix_size * matrix_size; int coeff[SL_MAX_MATRIX_SIZE * SL_MAX_MATRIX_SIZE]; const uint8_t *pred; const int *scaling_list; int dc = 0; if (aps->aps_chroma_present_flag || is_luma_list(id)) { if (!aps->scaling_list_copy_mode_flag[id]) { int next_coef = 0; if (id >= SL_START_16x16) dc = next_coef = aps->scaling_list_dc_coef[id - SL_START_16x16]; for (int i = 0; i < list_size; i++) { const int x = ff_vvc_diag_scan_x[3][3][i]; const int y = ff_vvc_diag_scan_y[3][3][i]; if (!(id >= SL_START_64x64 && x >= 4 && y >= 4)) next_coef += aps->scaling_list_delta_coef[id][i]; coeff[i] = next_coef; } } } //dc if (id >= SL_START_16x16) { if (!aps->scaling_list_copy_mode_flag[id] && !aps->scaling_list_pred_mode_flag[id]) { sl->scaling_matrix_dc_rec[id - SL_START_16x16] = 8; } else if (!aps->scaling_list_pred_id_delta[id]) { sl->scaling_matrix_dc_rec[id - SL_START_16x16] = 16; } else { const int ref_id = id - aps->scaling_list_pred_id_delta[id]; if (ref_id >= SL_START_16x16) dc += sl->scaling_matrix_dc_rec[ref_id - SL_START_16x16]; else dc += sl->scaling_matrix_rec[ref_id][0]; sl->scaling_matrix_dc_rec[id - SL_START_16x16] = dc & 255; } } //ac scaling_list = aps->scaling_list_copy_mode_flag[id] ? ff_vvc_scaling_list0 : coeff; if (!aps->scaling_list_copy_mode_flag[id] && !aps->scaling_list_pred_mode_flag[id]) pred = ff_vvc_scaling_pred_8; else if (!aps->scaling_list_pred_id_delta[id]) pred = ff_vvc_scaling_pred_16; else pred = sl->scaling_matrix_rec[id - aps->scaling_list_pred_id_delta[id]]; for (int i = 0; i < list_size; i++) { const int x = ff_vvc_diag_scan_x[log2_size][log2_size][i]; const int y = ff_vvc_diag_scan_y[log2_size][log2_size][i]; const int off = y * matrix_size + x; sl->scaling_matrix_rec[id][off] = (pred[off] + scaling_list[i]) & 255; } } } static int aps_decode_scaling(const VVCScalingList **scaling, const H266RawAPS *aps) { VVCScalingList *sl = ff_refstruct_allocz(sizeof(*sl)); if (!sl) return AVERROR(ENOMEM); scaling_derive(sl, aps); ff_refstruct_replace(scaling, sl); ff_refstruct_unref(&sl); return 0; } int ff_vvc_decode_aps(VVCParamSets *ps, const CodedBitstreamUnit *unit) { const H266RawAPS *aps = unit->content_ref; int ret = 0; if (!aps) return AVERROR_INVALIDDATA; switch (aps->aps_params_type) { case VVC_ASP_TYPE_ALF: ret = aps_decode_alf(&ps->alf_list[aps->aps_adaptation_parameter_set_id], aps); break; case VVC_ASP_TYPE_LMCS: ff_refstruct_replace(&ps->lmcs_list[aps->aps_adaptation_parameter_set_id], aps); break; case VVC_ASP_TYPE_SCALING: ret = aps_decode_scaling(&ps->scaling_list[aps->aps_adaptation_parameter_set_id], aps); break; } return ret; } static int sh_alf_aps(const VVCSH *sh, const VVCFrameParamSets *fps) { if (!sh->r->sh_alf_enabled_flag) return 0; for (int i = 0; i < sh->r->sh_num_alf_aps_ids_luma; i++) { const VVCALF *alf_aps_luma = fps->alf_list[sh->r->sh_alf_aps_id_luma[i]]; if (!alf_aps_luma) return AVERROR_INVALIDDATA; } if (sh->r->sh_alf_cb_enabled_flag || sh->r->sh_alf_cr_enabled_flag) { const VVCALF *alf_aps_chroma = fps->alf_list[sh->r->sh_alf_aps_id_chroma]; if (!alf_aps_chroma) return AVERROR_INVALIDDATA; } if (fps->sps->r->sps_ccalf_enabled_flag) { if (sh->r->sh_alf_cc_cb_enabled_flag) { const VVCALF *alf_aps_cc_cr = fps->alf_list[sh->r->sh_alf_cc_cb_aps_id]; if (!alf_aps_cc_cr) return AVERROR_INVALIDDATA; } if (sh->r->sh_alf_cc_cr_enabled_flag) { const VVCALF *alf_aps_cc_cr = fps->alf_list[sh->r->sh_alf_cc_cr_aps_id]; if (!alf_aps_cc_cr) return AVERROR_INVALIDDATA; } } return 0; } static void sh_slice_address(VVCSH *sh, const H266RawSPS *sps, const VVCPPS *pps) { const int slice_address = sh->r->sh_slice_address; if (pps->r->pps_rect_slice_flag) { int pic_level_slice_idx = slice_address; for (int j = 0; j < sh->r->curr_subpic_idx; j++) pic_level_slice_idx += pps->r->num_slices_in_subpic[j]; sh->ctb_addr_in_curr_slice = pps->ctb_addr_in_slice + pps->slice_start_offset[pic_level_slice_idx]; sh->num_ctus_in_curr_slice = pps->num_ctus_in_slice[pic_level_slice_idx]; } else { int tile_x = slice_address % pps->r->num_tile_columns; int tile_y = slice_address / pps->r->num_tile_columns; const int slice_start_ctb = pps->row_bd[tile_y] * pps->ctb_width + pps->col_bd[tile_x] * pps->r->row_height_val[tile_y]; sh->ctb_addr_in_curr_slice = pps->ctb_addr_in_slice + slice_start_ctb; sh->num_ctus_in_curr_slice = 0; for (int tile_idx = slice_address; tile_idx <= slice_address + sh->r->sh_num_tiles_in_slice_minus1; tile_idx++) { tile_x = tile_idx % pps->r->num_tile_columns; tile_y = tile_idx / pps->r->num_tile_columns; sh->num_ctus_in_curr_slice += pps->r->row_height_val[tile_y] * pps->r->col_width_val[tile_x]; } } } static void sh_qp_y(VVCSH *sh, const H266RawPPS *pps, const H266RawPictureHeader *ph) { const int init_qp = pps->pps_init_qp_minus26 + 26; if (!pps->pps_qp_delta_info_in_ph_flag) sh->slice_qp_y = init_qp + sh->r->sh_qp_delta; else sh->slice_qp_y = init_qp + ph->ph_qp_delta; } static void sh_inter(VVCSH *sh, const H266RawSPS *sps, const H266RawPPS *pps) { const H266RawSliceHeader *rsh = sh->r; if (!pps->pps_wp_info_in_ph_flag && ((pps->pps_weighted_pred_flag && IS_P(rsh)) || (pps->pps_weighted_bipred_flag && IS_B(rsh)))) pred_weight_table(&sh->pwt, &rsh->sh_pred_weight_table); } static void sh_deblock_offsets(VVCSH *sh) { const H266RawSliceHeader *r = sh->r; if (!r->sh_deblocking_filter_disabled_flag) { sh->deblock.beta_offset[LUMA] = r->sh_luma_beta_offset_div2 << 1; sh->deblock.tc_offset[LUMA] = r->sh_luma_tc_offset_div2 << 1; sh->deblock.beta_offset[CB] = r->sh_cb_beta_offset_div2 << 1; sh->deblock.tc_offset[CB] = r->sh_cb_tc_offset_div2 << 1; sh->deblock.beta_offset[CR] = r->sh_cr_beta_offset_div2 << 1; sh->deblock.tc_offset[CR] = r->sh_cr_tc_offset_div2 << 1; } } static void sh_partition_constraints(VVCSH *sh, const H266RawSPS *sps, const H266RawPictureHeader *ph) { const int min_cb_log2_size_y = sps->sps_log2_min_luma_coding_block_size_minus2 + 2; int min_qt_log2_size_y[2]; if (IS_I(sh->r)) { min_qt_log2_size_y[LUMA] = (min_cb_log2_size_y + ph->ph_log2_diff_min_qt_min_cb_intra_slice_luma); min_qt_log2_size_y[CHROMA] = (min_cb_log2_size_y + ph->ph_log2_diff_min_qt_min_cb_intra_slice_chroma); sh->max_bt_size[LUMA] = 1 << (min_qt_log2_size_y[LUMA] + ph->ph_log2_diff_max_bt_min_qt_intra_slice_luma); sh->max_bt_size[CHROMA] = 1 << (min_qt_log2_size_y[CHROMA]+ ph->ph_log2_diff_max_bt_min_qt_intra_slice_chroma); sh->max_tt_size[LUMA] = 1 << (min_qt_log2_size_y[LUMA] + ph->ph_log2_diff_max_tt_min_qt_intra_slice_luma); sh->max_tt_size[CHROMA] = 1 << (min_qt_log2_size_y[CHROMA]+ ph->ph_log2_diff_max_tt_min_qt_intra_slice_chroma); sh->max_mtt_depth[LUMA] = ph->ph_max_mtt_hierarchy_depth_intra_slice_luma; sh->max_mtt_depth[CHROMA] = ph->ph_max_mtt_hierarchy_depth_intra_slice_chroma; sh->cu_qp_delta_subdiv = ph->ph_cu_qp_delta_subdiv_intra_slice; sh->cu_chroma_qp_offset_subdiv = ph->ph_cu_chroma_qp_offset_subdiv_intra_slice; } else { for (int i = LUMA; i <= CHROMA; i++) { min_qt_log2_size_y[i] = (min_cb_log2_size_y + ph->ph_log2_diff_min_qt_min_cb_inter_slice); sh->max_bt_size[i] = 1 << (min_qt_log2_size_y[i] + ph->ph_log2_diff_max_bt_min_qt_inter_slice); sh->max_tt_size[i] = 1 << (min_qt_log2_size_y[i] + ph->ph_log2_diff_max_tt_min_qt_inter_slice); sh->max_mtt_depth[i] = ph->ph_max_mtt_hierarchy_depth_inter_slice; } sh->cu_qp_delta_subdiv = ph->ph_cu_qp_delta_subdiv_inter_slice; sh->cu_chroma_qp_offset_subdiv = ph->ph_cu_chroma_qp_offset_subdiv_inter_slice; } sh->min_qt_size[LUMA] = 1 << min_qt_log2_size_y[LUMA]; sh->min_qt_size[CHROMA] = 1 << min_qt_log2_size_y[CHROMA]; } static void sh_entry_points(VVCSH *sh, const H266RawSPS *sps, const VVCPPS *pps) { if (sps->sps_entry_point_offsets_present_flag) { for (int i = 1, j = 0; i < sh->num_ctus_in_curr_slice; i++) { const int pre_ctb_addr_x = sh->ctb_addr_in_curr_slice[i - 1] % pps->ctb_width; const int pre_ctb_addr_y = sh->ctb_addr_in_curr_slice[i - 1] / pps->ctb_width; const int ctb_addr_x = sh->ctb_addr_in_curr_slice[i] % pps->ctb_width; const int ctb_addr_y = sh->ctb_addr_in_curr_slice[i] / pps->ctb_width; if (pps->ctb_to_row_bd[ctb_addr_y] != pps->ctb_to_row_bd[pre_ctb_addr_y] || pps->ctb_to_col_bd[ctb_addr_x] != pps->ctb_to_col_bd[pre_ctb_addr_x] || (ctb_addr_y != pre_ctb_addr_y && sps->sps_entropy_coding_sync_enabled_flag)) { sh->entry_point_start_ctu[j++] = i; } } } } static int sh_derive(VVCSH *sh, const VVCFrameParamSets *fps) { const H266RawSPS *sps = fps->sps->r; const H266RawPPS *pps = fps->pps->r; const H266RawPictureHeader *ph = fps->ph.r; int ret; sh_slice_address(sh, sps, fps->pps); ret = sh_alf_aps(sh, fps); if (ret < 0) return ret; sh_inter(sh, sps, pps); sh_qp_y(sh, pps, ph); sh_deblock_offsets(sh); sh_partition_constraints(sh, sps, ph); sh_entry_points(sh, sps, fps->pps); return 0; } int ff_vvc_decode_sh(VVCSH *sh, const VVCFrameParamSets *fps, const CodedBitstreamUnit *unit) { int ret; if (!fps->sps || !fps->pps) return AVERROR_INVALIDDATA; ff_refstruct_replace(&sh->r, unit->content_ref); ret = sh_derive(sh, fps); if (ret < 0) return ret; return 0; }