avcodec/vvc: Rename vvc_?foo->foo

A namespace is unnecessary here given that all these files
are already in the vvc subfolder.

Reviewed-by: Nuo Mi <nuomi2021@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 1283 insertions, 0 deletions

diff --git a/libavcodec/vvc/ps.c b/libavcodec/vvc/ps.c
new file mode 100644
index 0000000000..0365feab47
--- /dev/null
+++ b/libavcodec/vvc/ps.c
@@ -0,0 +1,1283 @@
+/*
+ * 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/mem.h"
+#include "libavutil/pixdesc.h"
+#include "libavcodec/refstruct.h"
+#include "data.h"
+#include "ps.h"
+#include "dec.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];
+    }
+    pps->col_bd[r->num_tile_columns] = pps->ctb_to_col_bd[pps->ctb_width] = pps->ctb_width;
+
+    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];
+    }
+    pps->row_bd[r->num_tile_rows] = pps->ctb_to_row_bd[pps->ctb_height] = pps->ctb_height;
+
+    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 *rx, int *ry, const int tile_x, const int tile_y, const VVCPPS *pps)
+{
+    *rx = pps->col_bd[tile_x];
+    *ry = pps->row_bd[tile_y];
+}
+
+static int ctu_rs(const int rx, const int ry, const VVCPPS *pps)
+{
+    return pps->ctb_width * ry + rx;
+}
+
+static int pps_add_ctus(VVCPPS *pps, int *off, const int rx, const int ry,
+    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(rx + x, ry + y, pps);
+            (*off)++;
+        }
+    }
+    return *off - start;
+}
+
+static void pps_single_slice_picture(VVCPPS *pps, int *off)
+{
+    for (int j = 0; j < pps->r->num_tile_rows; j++) {
+        for (int i = 0; i < pps->r->num_tile_columns; i++) {
+            pps->num_ctus_in_slice[0] = pps_add_ctus(pps, off,
+                pps->col_bd[i], pps->row_bd[j],
+                pps->r->col_width_val[i], pps->r->row_height_val[j]);
+        }
+    }
+}
+
+static void subpic_tiles(int *tile_x, int *tile_y, int *tile_x_end, int *tile_y_end,
+    const VVCSPS *sps, const VVCPPS *pps,  const int i)
+{
+    const int rx = sps->r->sps_subpic_ctu_top_left_x[i];
+    const int ry = sps->r->sps_subpic_ctu_top_left_y[i];
+
+    *tile_x = *tile_y = 0;
+
+    while (pps->col_bd[*tile_x] != rx)
+        (*tile_x)++;
+
+    while (pps->row_bd[*tile_y] != ry)
+        (*tile_y)++;
+
+    *tile_x_end = (*tile_x);
+    *tile_y_end = (*tile_y);
+
+    while (pps->col_bd[*tile_x_end] < rx + sps->r->sps_subpic_width_minus1[i] + 1)
+        (*tile_x_end)++;
+
+    while (pps->row_bd[*tile_y_end] < ry + sps->r->sps_subpic_height_minus1[i] + 1)
+        (*tile_y_end)++;
+}
+
+static void pps_subpic_less_than_one_tile_slice(VVCPPS *pps, const VVCSPS *sps, const int i, const int tx, const int ty, int *off)
+{
+    pps->num_ctus_in_slice[i] = pps_add_ctus(pps, off,
+        pps->col_bd[tx], pps->row_bd[ty],
+        pps->r->col_width_val[tx], sps->r->sps_subpic_height_minus1[i] + 1);
+}
+
+static void pps_subpic_one_or_more_tiles_slice(VVCPPS *pps, const int tile_x, const int tile_y, const int x_end, const int y_end, const int i, int *off)
+{
+    for (int ty = tile_y; ty < y_end; ty++) {
+        for (int tx = tile_x; tx < x_end; tx++) {
+            pps->num_ctus_in_slice[i] += pps_add_ctus(pps, off,
+                pps->col_bd[tx], pps->row_bd[ty],
+                pps->r->col_width_val[tx], pps->r->row_height_val[ty]);
+        }
+    }
+}
+
+static void pps_subpic_slice(VVCPPS *pps, const VVCSPS *sps, const int i, int *off)
+{
+    int tx, ty, x_end, y_end;
+
+    pps->slice_start_offset[i] = *off;
+    pps->num_ctus_in_slice[i] = 0;
+
+    subpic_tiles(&tx, &ty, &x_end, &y_end, sps, pps, i);
+    if (ty + 1 == y_end && sps->r->sps_subpic_height_minus1[i] + 1 < pps->r->row_height_val[ty])
+        pps_subpic_less_than_one_tile_slice(pps, sps, i, tx, ty, off);
+    else
+        pps_subpic_one_or_more_tiles_slice(pps, tx, ty, x_end, y_end, i, off);
+}
+
+static void pps_single_slice_per_subpic(VVCPPS *pps, const VVCSPS *sps, int *off)
+{
+    if (!sps->r->sps_subpic_info_present_flag) {
+        pps_single_slice_picture(pps, off);
+    } else {
+        for (int i = 0; i < pps->r->pps_num_slices_in_pic_minus1 + 1; i++)
+            pps_subpic_slice(pps, sps, i, off);
+    }
+}
+
+static int pps_one_tile_slices(VVCPPS *pps, const int tile_idx, int i, int *off)
+{
+    const H266RawPPS *r = pps->r;
+    int rx, ry, ctu_y_end, tile_x, tile_y;
+
+    tile_xy(&tile_x, &tile_y, tile_idx, pps);
+    ctu_xy(&rx, &ry, tile_x, tile_y, pps);
+    ctu_y_end = ry + r->row_height_val[tile_y];
+    while (ry < ctu_y_end) {
+        pps->slice_start_offset[i] = *off;
+        pps->num_ctus_in_slice[i] = pps_add_ctus(pps, off, rx, ry,
+            r->col_width_val[tile_x], r->slice_height_in_ctus[i]);
+        ry += 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 rx, ry, 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(&rx, &ry, tx, ty, pps);
+            pps->num_ctus_in_slice[i] += pps_add_ctus(pps, off, rx, ry,
+                r->col_width_val[tx], r->row_height_val[ty]);
+        }
+    }
+}
+
+static void pps_rect_slice(VVCPPS *pps, const VVCSPS *sps)
+{
+    const H266RawPPS *r = pps->r;
+    int tile_idx = 0, off = 0;
+
+    if (r->pps_single_slice_per_subpic_flag) {
+        pps_single_slice_per_subpic(pps, sps, &off);
+        return;
+    }
+
+    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 rx, ry, 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(&rx, &ry, tile_x, tile_y, pps);
+            pps_add_ctus(pps, &off, rx, ry, r->col_width_val[tile_x], r->row_height_val[tile_y]);
+        }
+    }
+}
+
+static int pps_slice_map(VVCPPS *pps, const VVCSPS *sps)
+{
+    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, sps);
+    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 void pps_subpic(VVCPPS *pps, const VVCSPS *sps)
+{
+    const H266RawSPS *rsps = sps->r;
+    for (int i = 0; i < rsps->sps_num_subpics_minus1 + 1; i++) {
+        if (rsps->sps_subpic_treated_as_pic_flag[i]) {
+            pps->subpic_x[i]      = rsps->sps_subpic_ctu_top_left_x[i] << sps->ctb_log2_size_y;
+            pps->subpic_y[i]      = rsps->sps_subpic_ctu_top_left_y[i] << sps->ctb_log2_size_y;
+            pps->subpic_width[i]  = FFMIN(pps->width  - pps->subpic_x[i], (rsps->sps_subpic_width_minus1[i]  + 1) << sps->ctb_log2_size_y);
+            pps->subpic_height[i] = FFMIN(pps->height - pps->subpic_y[i], (rsps->sps_subpic_height_minus1[i] + 1) << sps->ctb_log2_size_y);
+        } else {
+            pps->subpic_x[i]      = 0;
+            pps->subpic_y[i]      = 0;
+            pps->subpic_width[i]  = pps->width;
+            pps->subpic_height[i] = pps->height;
+        }
+    }
+}
+
+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, sps);
+    if (ret < 0)
+        return ret;
+
+    pps_ref_wraparound_offset(pps, sps);
+    pps_subpic(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 = 1;
+    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;
+}