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, 1286 insertions, 0 deletions

diff --git a/libavcodec/vvc/filter.c b/libavcodec/vvc/filter.c
new file mode 100644
index 0000000000..8f44255ce4
--- /dev/null
+++ b/libavcodec/vvc/filter.c
@@ -0,0 +1,1286 @@
+/*
+ * VVC filters
+ *
+ * Copyright (C) 2021 Nuo Mi
+ *
+ * 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 "libavutil/frame.h"
+
+#include "ctu.h"
+#include "data.h"
+#include "filter.h"
+#include "refs.h"
+
+#define LEFT        0
+#define TOP         1
+#define RIGHT       2
+#define BOTTOM      3
+#define MAX_EDGES   4
+
+#define DEFAULT_INTRA_TC_OFFSET 2
+
+//Table 43 Derivation of threshold variables beta' and tc' from input Q
+static const uint16_t tctable[66] = {
+      0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
+      0,   0,   3,   4,   4,   4,   4,   5,   5,   5,   5,   7,   7,   8,   9,  10,
+     10,  11,  13,  14,  15,  17,  19,  21,  24,  25,  29,  33,  36,  41,  45,  51,
+     57,  64,  71,  80,  89, 100, 112, 125, 141, 157, 177, 198, 222, 250, 280, 314,
+    352, 395,
+};
+
+//Table 43 Derivation of threshold variables beta' and tc' from input Q
+static const uint8_t betatable[64] = {
+      0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
+      6,   7,   8,   9,  10,  11,  12,  13,  14,  15,  16,  17,  18,  20,  22,  24,
+     26,  28,  30,  32,  34,  36,  38,  40,  42,  44,  46,  48,  50,  52,  54,  56,
+     58,  60,  62,  64,  66,  68,  70,  72,  74,  76,  78,  80,  82,  84,  86,  88,
+};
+
+static int get_qPc(const VVCFrameContext *fc, const int x0, const int y0, const int chroma)
+{
+    const int x            = x0 >> MIN_TU_LOG2;
+    const int y            = y0 >> MIN_TU_LOG2;
+    const int min_tu_width = fc->ps.pps->min_tu_width;
+    return fc->tab.qp[chroma][x + y * min_tu_width];
+}
+
+static void copy_ctb(uint8_t *dst, const uint8_t *src, const int width, const int height,
+    const ptrdiff_t dst_stride, const ptrdiff_t src_stride)
+{
+    for (int y = 0; y < height; y++) {
+        memcpy(dst, src, width);
+
+        dst += dst_stride;
+        src += src_stride;
+    }
+}
+
+static void copy_pixel(uint8_t *dst, const uint8_t *src, const int pixel_shift)
+{
+    if (pixel_shift)
+        *(uint16_t *)dst = *(uint16_t *)src;
+    else
+        *dst = *src;
+}
+
+static void copy_vert(uint8_t *dst, const uint8_t *src, const int pixel_shift, const int height,
+    const ptrdiff_t dst_stride, const ptrdiff_t src_stride)
+{
+    int i;
+    if (pixel_shift == 0) {
+        for (i = 0; i < height; i++) {
+            *dst = *src;
+            dst += dst_stride;
+            src += src_stride;
+        }
+    } else {
+        for (i = 0; i < height; i++) {
+            *(uint16_t *)dst = *(uint16_t *)src;
+            dst += dst_stride;
+            src += src_stride;
+        }
+    }
+}
+
+static void copy_ctb_to_hv(VVCFrameContext *fc, const uint8_t *src,
+    const ptrdiff_t src_stride, const int x, const int y, const int width, const int height,
+    const int c_idx, const int rx, const int ry, const int top)
+{
+    const int ps = fc->ps.sps->pixel_shift;
+    const int w  = fc->ps.pps->width >> fc->ps.sps->hshift[c_idx];
+    const int h  = fc->ps.pps->height >> fc->ps.sps->vshift[c_idx];
+
+    if (top) {
+        /* top */
+        memcpy(fc->tab.sao_pixel_buffer_h[c_idx] + (((2 * ry) * w + x) << ps),
+            src, width << ps);
+    } else {
+        /* bottom */
+        memcpy(fc->tab.sao_pixel_buffer_h[c_idx] + (((2 * ry + 1) * w + x) << ps),
+            src + src_stride * (height - 1), width << ps);
+
+        /* copy vertical edges */
+        copy_vert(fc->tab.sao_pixel_buffer_v[c_idx] + (((2 * rx) * h + y) << ps), src, ps, height, 1 << ps, src_stride);
+        copy_vert(fc->tab.sao_pixel_buffer_v[c_idx] + (((2 * rx + 1) * h + y) << ps), src + ((width - 1) << ps), ps, height, 1 << ps, src_stride);
+    }
+}
+
+static void sao_copy_ctb_to_hv(VVCLocalContext *lc, const int rx, const int ry, const int top)
+{
+    VVCFrameContext *fc  = lc->fc;
+    const int ctb_size_y = fc->ps.sps->ctb_size_y;
+    const int x0         = rx << fc->ps.sps->ctb_log2_size_y;
+    const int y0         = ry << fc->ps.sps->ctb_log2_size_y;
+
+    for (int c_idx = 0; c_idx < (fc->ps.sps->r->sps_chroma_format_idc ? 3 : 1); c_idx++) {
+        const int x                = x0 >> fc->ps.sps->hshift[c_idx];
+        const int y                = y0 >> fc->ps.sps->vshift[c_idx];
+        const ptrdiff_t src_stride = fc->frame->linesize[c_idx];
+        const int ctb_size_h       = ctb_size_y >> fc->ps.sps->hshift[c_idx];
+        const int ctb_size_v       = ctb_size_y >> fc->ps.sps->vshift[c_idx];
+        const int width            = FFMIN(ctb_size_h, (fc->ps.pps->width  >> fc->ps.sps->hshift[c_idx]) - x);
+        const int height           = FFMIN(ctb_size_v, (fc->ps.pps->height >> fc->ps.sps->vshift[c_idx]) - y);
+        const uint8_t *src          = &fc->frame->data[c_idx][y * src_stride + (x << fc->ps.sps->pixel_shift)];
+        copy_ctb_to_hv(fc, src, src_stride, x, y, width, height, c_idx, rx, ry, top);
+    }
+}
+
+void ff_vvc_sao_copy_ctb_to_hv(VVCLocalContext *lc, const int rx, const int ry, const int last_row)
+{
+    if (ry)
+        sao_copy_ctb_to_hv(lc, rx, ry - 1, 0);
+
+    sao_copy_ctb_to_hv(lc, rx, ry, 1);
+
+    if (last_row)
+        sao_copy_ctb_to_hv(lc, rx, ry, 0);
+}
+
+void ff_vvc_sao_filter(VVCLocalContext *lc, int x, int y)
+{
+    VVCFrameContext *fc  = lc->fc;
+    const int ctb_size_y = fc->ps.sps->ctb_size_y;
+    static const uint8_t sao_tab[16] = { 0, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8 };
+    int c_idx;
+    const int rx         = x >> fc->ps.sps->ctb_log2_size_y;
+    const int ry         = y >> fc->ps.sps->ctb_log2_size_y;
+    int edges[4]         = { !rx, !ry, rx == fc->ps.pps->ctb_width - 1, ry == fc->ps.pps->ctb_height - 1 };
+    const SAOParams *sao = &CTB(fc->tab.sao, rx, ry);
+    // flags indicating unfilterable edges
+    uint8_t vert_edge[]          = { 0, 0 };
+    uint8_t horiz_edge[]         = { 0, 0 };
+    uint8_t diag_edge[]          = { 0, 0, 0, 0 };
+    uint8_t tile_edge[]          = { 0, 0, 0, 0 };
+    uint8_t subpic_edge[]        = { 0, 0, 0, 0 };
+    const int subpic_idx         = lc->sc->sh.r->curr_subpic_idx;
+    const uint8_t lfase          = fc->ps.pps->r->pps_loop_filter_across_slices_enabled_flag;
+    const uint8_t no_tile_filter = fc->ps.pps->r->num_tiles_in_pic > 1 &&
+                               !fc->ps.pps->r->pps_loop_filter_across_tiles_enabled_flag;
+    const uint8_t no_subpic_filter = fc->ps.sps->r->sps_num_subpics_minus1 &&
+        !fc->ps.sps->r->sps_loop_filter_across_subpic_enabled_flag[subpic_idx];
+    const uint8_t restore        = no_subpic_filter || no_tile_filter || !lfase;
+
+    if (restore) {
+        if (!edges[LEFT]) {
+            tile_edge[LEFT]   = no_tile_filter && fc->ps.pps->ctb_to_col_bd[rx] == rx;
+            subpic_edge[LEFT] = no_subpic_filter && fc->ps.sps->r->sps_subpic_ctu_top_left_x[subpic_idx] == rx;
+            vert_edge[0]      = (!lfase && CTB(fc->tab.slice_idx, rx, ry) != CTB(fc->tab.slice_idx, rx - 1, ry)) || tile_edge[LEFT] || subpic_edge[LEFT];
+        }
+        if (!edges[RIGHT]) {
+            tile_edge[RIGHT]   = no_tile_filter && fc->ps.pps->ctb_to_col_bd[rx] != fc->ps.pps->ctb_to_col_bd[rx + 1];
+            subpic_edge[RIGHT] = no_subpic_filter &&
+                fc->ps.sps->r->sps_subpic_ctu_top_left_x[subpic_idx] + fc->ps.sps->r->sps_subpic_width_minus1[subpic_idx] == rx;
+            vert_edge[1]       = (!lfase && CTB(fc->tab.slice_idx, rx, ry) != CTB(fc->tab.slice_idx, rx + 1, ry)) || tile_edge[RIGHT] || subpic_edge[RIGHT];
+        }
+        if (!edges[TOP]) {
+            tile_edge[TOP]   = no_tile_filter && fc->ps.pps->ctb_to_row_bd[ry] == ry;
+            subpic_edge[TOP] = no_subpic_filter && fc->ps.sps->r->sps_subpic_ctu_top_left_y[subpic_idx] == ry;
+            horiz_edge[0]    = (!lfase && CTB(fc->tab.slice_idx, rx, ry) != CTB(fc->tab.slice_idx, rx, ry - 1)) || tile_edge[TOP] || subpic_edge[TOP];
+        }
+        if (!edges[BOTTOM]) {
+            tile_edge[BOTTOM]   = no_tile_filter && fc->ps.pps->ctb_to_row_bd[ry] != fc->ps.pps->ctb_to_row_bd[ry + 1];
+            subpic_edge[BOTTOM] = no_subpic_filter &&
+                fc->ps.sps->r->sps_subpic_ctu_top_left_y[subpic_idx] + fc->ps.sps->r->sps_subpic_height_minus1[subpic_idx] == ry;
+            horiz_edge[1]       = (!lfase && CTB(fc->tab.slice_idx, rx, ry) != CTB(fc->tab.slice_idx, rx, ry + 1)) || tile_edge[BOTTOM] || subpic_edge[BOTTOM];
+        }
+        if (!edges[LEFT] && !edges[TOP]) {
+            diag_edge[0] = (!lfase && CTB(fc->tab.slice_idx, rx, ry) != CTB(fc->tab.slice_idx, rx - 1, ry - 1)) ||
+                tile_edge[LEFT] || tile_edge[TOP] || subpic_edge[LEFT] || subpic_edge[TOP];
+        }
+        if (!edges[TOP] && !edges[RIGHT]) {
+            diag_edge[1] = (!lfase && CTB(fc->tab.slice_idx, rx, ry) != CTB(fc->tab.slice_idx, rx + 1, ry - 1)) ||
+                tile_edge[RIGHT] || tile_edge[TOP] || subpic_edge[TOP] || subpic_edge[RIGHT];
+        }
+        if (!edges[RIGHT] && !edges[BOTTOM]) {
+            diag_edge[2] = (!lfase && CTB(fc->tab.slice_idx, rx, ry) != CTB(fc->tab.slice_idx, rx + 1, ry + 1)) ||
+                tile_edge[RIGHT] || tile_edge[BOTTOM] || subpic_edge[RIGHT] || subpic_edge[BOTTOM];
+        }
+        if (!edges[LEFT] && !edges[BOTTOM]) {
+            diag_edge[3] = (!lfase && CTB(fc->tab.slice_idx, rx, ry) != CTB(fc->tab.slice_idx, rx - 1, ry + 1)) ||
+                tile_edge[LEFT] || tile_edge[BOTTOM] || subpic_edge[LEFT] || subpic_edge[BOTTOM];
+        }
+    }
+
+    for (c_idx = 0; c_idx < (fc->ps.sps->r->sps_chroma_format_idc ? 3 : 1); c_idx++) {
+        int x0       = x >> fc->ps.sps->hshift[c_idx];
+        int y0       = y >> fc->ps.sps->vshift[c_idx];
+        ptrdiff_t src_stride = fc->frame->linesize[c_idx];
+        int ctb_size_h = ctb_size_y >> fc->ps.sps->hshift[c_idx];
+        int ctb_size_v = ctb_size_y >> fc->ps.sps->vshift[c_idx];
+        int width    = FFMIN(ctb_size_h, (fc->ps.pps->width  >> fc->ps.sps->hshift[c_idx]) - x0);
+        int height   = FFMIN(ctb_size_v, (fc->ps.pps->height >> fc->ps.sps->vshift[c_idx]) - y0);
+        int tab      = sao_tab[(FFALIGN(width, 8) >> 3) - 1];
+        uint8_t *src = &fc->frame->data[c_idx][y0 * src_stride + (x0 << fc->ps.sps->pixel_shift)];
+        ptrdiff_t dst_stride;
+        uint8_t *dst;
+
+        switch (sao->type_idx[c_idx]) {
+        case SAO_BAND:
+            fc->vvcdsp.sao.band_filter[tab](src, src, src_stride, src_stride,
+                sao->offset_val[c_idx], sao->band_position[c_idx], width, height);
+            break;
+        case SAO_EDGE:
+        {
+            const int w = fc->ps.pps->width >> fc->ps.sps->hshift[c_idx];
+            const int h = fc->ps.pps->height >> fc->ps.sps->vshift[c_idx];
+            const int sh = fc->ps.sps->pixel_shift;
+
+            dst_stride = 2*MAX_PB_SIZE + AV_INPUT_BUFFER_PADDING_SIZE;
+            dst = lc->sao_buffer + dst_stride + AV_INPUT_BUFFER_PADDING_SIZE;
+
+            if (!edges[TOP]) {
+                const int left = 1 - edges[LEFT];
+                const int right = 1 - edges[RIGHT];
+                const uint8_t *src1;
+                uint8_t *dst1;
+                int pos = 0;
+
+                dst1 = dst - dst_stride - (left << sh);
+                src1 = fc->tab.sao_pixel_buffer_h[c_idx] + (((2 * ry - 1) * w + x0 - left) << sh);
+                if (left) {
+                    copy_pixel(dst1, src1, sh);
+                    pos += (1 << sh);
+                }
+                memcpy(dst1 + pos, src1 + pos, width << sh);
+                if (right) {
+                    pos += width << sh;
+                    copy_pixel(dst1 + pos, src1 + pos, sh);
+                }
+            }
+            if (!edges[BOTTOM]) {
+                const int left = 1 - edges[LEFT];
+                const int right = 1 - edges[RIGHT];
+                const uint8_t *src1;
+                uint8_t *dst1;
+                int pos = 0;
+
+                dst1 = dst + height * dst_stride - (left << sh);
+                src1 = fc->tab.sao_pixel_buffer_h[c_idx] + (((2 * ry + 2) * w + x0 - left) << sh);
+                if (left) {
+                    copy_pixel(dst1, src1, sh);
+                    pos += (1 << sh);
+                }
+                memcpy(dst1 + pos, src1 + pos, width << sh);
+                if (right) {
+                    pos += width << sh;
+                    copy_pixel(dst1 + pos, src1 + pos, sh);
+                }
+            }
+            if (!edges[LEFT]) {
+                copy_vert(dst - (1 << sh),
+                    fc->tab.sao_pixel_buffer_v[c_idx] + (((2 * rx - 1) * h + y0) << sh),
+                    sh, height, dst_stride, 1 << sh);
+            }
+            if (!edges[RIGHT]) {
+                copy_vert(dst + (width << sh),
+                    fc->tab.sao_pixel_buffer_v[c_idx] + (((2 * rx + 2) * h + y0) << sh),
+                    sh, height, dst_stride, 1 << sh);
+            }
+
+            copy_ctb(dst, src,  width << sh, height, dst_stride, src_stride);
+            fc->vvcdsp.sao.edge_filter[tab](src, dst, src_stride, sao->offset_val[c_idx],
+                sao->eo_class[c_idx], width, height);
+            fc->vvcdsp.sao.edge_restore[restore](src, dst, src_stride, dst_stride,
+                sao, edges, width, height, c_idx, vert_edge, horiz_edge, diag_edge);
+            break;
+        }
+        }
+    }
+}
+
+#define TAB_BS(t, x, y)       (t)[((y) >> 2) * (fc->tab.sz.bs_width) + ((x) >> 2)]
+#define TAB_MAX_LEN(t, x, y)  (t)[((y) >> 2) * (fc->tab.sz.bs_width) + ((x) >> 2)]
+
+//8 samples a time
+#define DEBLOCK_STEP            8
+#define LUMA_GRID               4
+#define CHROMA_GRID             8
+
+static int boundary_strength(const VVCLocalContext *lc, const MvField *curr, const MvField *neigh,
+    const RefPicList *neigh_rpl)
+{
+    RefPicList *rpl = lc->sc->rpl;
+
+    if (curr->pred_flag == PF_IBC)
+        return FFABS(neigh->mv[0].x - curr->mv[0].x) >= 8 || FFABS(neigh->mv[0].y - curr->mv[0].y) >= 8;
+
+    if (curr->pred_flag == PF_BI &&  neigh->pred_flag == PF_BI) {
+        // same L0 and L1
+        if (rpl[0].list[curr->ref_idx[0]] == neigh_rpl[0].list[neigh->ref_idx[0]]  &&
+            rpl[0].list[curr->ref_idx[0]] == rpl[1].list[curr->ref_idx[1]] &&
+            neigh_rpl[0].list[neigh->ref_idx[0]] == neigh_rpl[1].list[neigh->ref_idx[1]]) {
+            if ((FFABS(neigh->mv[0].x - curr->mv[0].x) >= 8 || FFABS(neigh->mv[0].y - curr->mv[0].y) >= 8 ||
+                 FFABS(neigh->mv[1].x - curr->mv[1].x) >= 8 || FFABS(neigh->mv[1].y - curr->mv[1].y) >= 8) &&
+                (FFABS(neigh->mv[1].x - curr->mv[0].x) >= 8 || FFABS(neigh->mv[1].y - curr->mv[0].y) >= 8 ||
+                 FFABS(neigh->mv[0].x - curr->mv[1].x) >= 8 || FFABS(neigh->mv[0].y - curr->mv[1].y) >= 8))
+                return 1;
+            else
+                return 0;
+        } else if (neigh_rpl[0].list[neigh->ref_idx[0]] == rpl[0].list[curr->ref_idx[0]] &&
+                   neigh_rpl[1].list[neigh->ref_idx[1]] == rpl[1].list[curr->ref_idx[1]]) {
+            if (FFABS(neigh->mv[0].x - curr->mv[0].x) >= 8 || FFABS(neigh->mv[0].y - curr->mv[0].y) >= 8 ||
+                FFABS(neigh->mv[1].x - curr->mv[1].x) >= 8 || FFABS(neigh->mv[1].y - curr->mv[1].y) >= 8)
+                return 1;
+            else
+                return 0;
+        } else if (neigh_rpl[1].list[neigh->ref_idx[1]] == rpl[0].list[curr->ref_idx[0]] &&
+                   neigh_rpl[0].list[neigh->ref_idx[0]] == rpl[1].list[curr->ref_idx[1]]) {
+            if (FFABS(neigh->mv[1].x - curr->mv[0].x) >= 8 || FFABS(neigh->mv[1].y - curr->mv[0].y) >= 8 ||
+                FFABS(neigh->mv[0].x - curr->mv[1].x) >= 8 || FFABS(neigh->mv[0].y - curr->mv[1].y) >= 8)
+                return 1;
+            else
+                return 0;
+        } else {
+            return 1;
+        }
+    } else if ((curr->pred_flag != PF_BI) && (neigh->pred_flag != PF_BI)){ // 1 MV
+        Mv A, B;
+        int ref_A, ref_B;
+
+        if (curr->pred_flag & 1) {
+            A     = curr->mv[0];
+            ref_A = rpl[0].list[curr->ref_idx[0]];
+        } else {
+            A     = curr->mv[1];
+            ref_A = rpl[1].list[curr->ref_idx[1]];
+        }
+
+        if (neigh->pred_flag & 1) {
+            B     = neigh->mv[0];
+            ref_B = neigh_rpl[0].list[neigh->ref_idx[0]];
+        } else {
+            B     = neigh->mv[1];
+            ref_B = neigh_rpl[1].list[neigh->ref_idx[1]];
+        }
+
+        if (ref_A == ref_B) {
+            if (FFABS(A.x - B.x) >= 8 || FFABS(A.y - B.y) >= 8)
+                return 1;
+            else
+                return 0;
+        } else
+            return 1;
+    }
+
+    return 1;
+}
+
+//part of 8.8.3.3 Derivation process of transform block boundary
+static void derive_max_filter_length_luma(const VVCFrameContext *fc, const int qx, const int qy,
+                                          const int is_intra, const int has_subblock, const int vertical, uint8_t *max_len_p, uint8_t *max_len_q)
+{
+    const int px =  vertical ? qx - 1 : qx;
+    const int py = !vertical ? qy - 1 : qy;
+    const uint8_t *tb_size = vertical ? fc->tab.tb_width[LUMA] : fc->tab.tb_height[LUMA];
+    const int size_p = tb_size[(py >> MIN_TU_LOG2) * fc->ps.pps->min_tu_width + (px >> MIN_TU_LOG2)];
+    const int size_q = tb_size[(qy >> MIN_TU_LOG2) * fc->ps.pps->min_tu_width + (qx >> MIN_TU_LOG2)];
+    const int min_cb_log2 = fc->ps.sps->min_cb_log2_size_y;
+    const int off_p = (py >> min_cb_log2) * fc->ps.pps->min_cb_width + (px >> min_cb_log2);
+    if (size_p <= 4 || size_q <= 4) {
+        *max_len_p = *max_len_q = 1;
+    } else {
+        *max_len_p = *max_len_q = 3;
+        if (size_p >= 32)
+            *max_len_p = 7;
+        if (size_q >= 32)
+            *max_len_q = 7;
+    }
+    if (has_subblock)
+        *max_len_q = FFMIN(5, *max_len_q);
+    if (fc->tab.msf[off_p] || fc->tab.iaf[off_p])
+        *max_len_p = FFMIN(5, *max_len_p);
+}
+
+static void vvc_deblock_subblock_bs_vertical(const VVCLocalContext *lc,
+    const int cb_x, const int cb_y, const int x0, const int y0, const int width, const int height)
+{
+    const VVCFrameContext  *fc = lc->fc;
+    const MvField *tab_mvf     = fc->tab.mvf;
+    const RefPicList *rpl      = lc->sc->rpl;
+    const int min_pu_width     = fc->ps.pps->min_pu_width;
+    const int log2_min_pu_size = MIN_PU_LOG2;
+
+    // bs for TU internal vertical PU boundaries
+    for (int j = 0; j < height; j += 4) {
+        const int y_pu = (y0 + j) >> log2_min_pu_size;
+
+        for (int i = 8 - ((x0 - cb_x) % 8); i < width; i += 8) {
+            const int xp_pu = (x0 + i - 1) >> log2_min_pu_size;
+            const int xq_pu = (x0 + i)     >> log2_min_pu_size;
+            const MvField *left = &tab_mvf[y_pu * min_pu_width + xp_pu];
+            const MvField *curr = &tab_mvf[y_pu * min_pu_width + xq_pu];
+            const int x = x0 + i;
+            const int y = y0 + j;
+            const int bs = boundary_strength(lc, curr, left, rpl);
+            uint8_t max_len_p = 0, max_len_q = 0;
+
+            TAB_BS(fc->tab.vertical_bs[LUMA], x, y) = bs;
+
+            if (i == 4 || i == width - 4)
+                max_len_p = max_len_q = 1;
+            else if (i == 8 || i == width - 8)
+                max_len_p = max_len_q = 2;
+            else
+                max_len_p = max_len_q = 3;
+
+            TAB_MAX_LEN(fc->tab.vertical_p, x, y) = max_len_p;
+            TAB_MAX_LEN(fc->tab.vertical_q, x, y) = max_len_q;
+        }
+    }
+}
+
+static void vvc_deblock_subblock_bs_horizontal(const VVCLocalContext *lc,
+    const int cb_x, const int cb_y, const int x0, const int y0, const int width, const int height)
+{
+    const VVCFrameContext  *fc = lc->fc;
+    const MvField* tab_mvf     = fc->tab.mvf;
+    const RefPicList* rpl      = lc->sc->rpl;
+    const int min_pu_width     = fc->ps.pps->min_pu_width;
+    const int log2_min_pu_size = MIN_PU_LOG2;
+
+    // bs for TU internal horizontal PU boundaries
+    for (int j = 8 - ((y0 - cb_y) % 8); j < height; j += 8) {
+        int yp_pu = (y0 + j - 1) >> log2_min_pu_size;
+        int yq_pu = (y0 + j)     >> log2_min_pu_size;
+
+        for (int i = 0; i < width; i += 4) {
+            const int x_pu = (x0 + i) >> log2_min_pu_size;
+            const MvField *top  = &tab_mvf[yp_pu * min_pu_width + x_pu];
+            const MvField *curr = &tab_mvf[yq_pu * min_pu_width + x_pu];
+            const int x = x0 + i;
+            const int y = y0 + j;
+            const int bs = boundary_strength(lc, curr, top, rpl);
+            uint8_t max_len_p = 0, max_len_q = 0;
+
+            TAB_BS(fc->tab.horizontal_bs[LUMA], x, y) = bs;
+
+            //fixme:
+            //edgeTbFlags[ x − sbW ][ y ] is equal to 1
+            //edgeTbFlags[ x + sbW ][ y ] is equal to 1
+            if (j == 4 || j == height - 4)
+                max_len_p = max_len_q = 1;
+            else if (j == 8 || j == height - 8)
+                max_len_p = max_len_q = 2;
+            else
+                max_len_p = max_len_q = 3;
+            TAB_MAX_LEN(fc->tab.horizontal_p, x, y) = max_len_p;
+            TAB_MAX_LEN(fc->tab.horizontal_q, x, y) = max_len_q;
+        }
+    }
+}
+
+static av_always_inline int deblock_bs(const VVCLocalContext *lc,
+    const int x_p, const int y_p, const int x_q, const int y_q,
+    const RefPicList *rpl_p, const int c_idx, const int off_to_cb, const uint8_t has_sub_block)
+{
+    const VVCFrameContext *fc  = lc->fc;
+    const MvField *tab_mvf     = fc->tab.mvf;
+    const int log2_min_pu_size = MIN_PU_LOG2;
+    const int log2_min_tu_size = MIN_TU_LOG2;
+    const int log2_min_cb_size = fc->ps.sps->min_cb_log2_size_y;
+    const int min_pu_width     = fc->ps.pps->min_pu_width;
+    const int min_tu_width     = fc->ps.pps->min_tu_width;
+    const int min_cb_width     = fc->ps.pps->min_cb_width;
+    const int pu_p             = (y_p >> log2_min_pu_size) * min_pu_width  + (x_p >>  log2_min_pu_size);
+    const int pu_q             = (y_q >> log2_min_pu_size) * min_pu_width  + (x_q >>  log2_min_pu_size);
+    const MvField *mvf_p       = &tab_mvf[pu_p];
+    const MvField *mvf_q       = &tab_mvf[pu_q];
+    const uint8_t chroma       = !!c_idx;
+    const int tu_p             = (y_p >> log2_min_tu_size) * min_tu_width  + (x_p >>  log2_min_tu_size);
+    const int tu_q             = (y_q >> log2_min_tu_size) * min_tu_width  + (x_q >>  log2_min_tu_size);
+    const uint8_t pcmf         = fc->tab.pcmf[chroma][tu_p] && fc->tab.pcmf[chroma][tu_q];
+    const int cb_p             = (y_p >> log2_min_cb_size) * min_cb_width  + (x_p >>  log2_min_cb_size);
+    const int cb_q             = (y_q >> log2_min_cb_size) * min_cb_width  + (x_q >>  log2_min_cb_size);
+    const uint8_t intra        = fc->tab.cpm[chroma][cb_p] == MODE_INTRA || fc->tab.cpm[chroma][cb_q] == MODE_INTRA;
+    const uint8_t same_mode    = fc->tab.cpm[chroma][cb_p] == fc->tab.cpm[chroma][cb_q];
+
+    if (pcmf)
+        return 0;
+
+    if (intra || mvf_p->ciip_flag || mvf_q->ciip_flag)
+        return 2;
+
+    if (chroma) {
+        return fc->tab.tu_coded_flag[c_idx][tu_p] ||
+               fc->tab.tu_coded_flag[c_idx][tu_q] ||
+               fc->tab.tu_joint_cbcr_residual_flag[tu_p] ||
+               fc->tab.tu_joint_cbcr_residual_flag[tu_q];
+    }
+
+    if (fc->tab.tu_coded_flag[LUMA][tu_p] || fc->tab.tu_coded_flag[LUMA][tu_q])
+        return 1;
+
+    if ((off_to_cb && ((off_to_cb % 8) || !has_sub_block)))
+        return 0;                                     // inside a cu, not aligned to 8 or with no subblocks
+
+    if (!same_mode)
+        return 1;
+
+    return boundary_strength(lc, mvf_q, mvf_p, rpl_p);
+}
+
+static int deblock_is_boundary(const VVCLocalContext *lc, const int boundary,
+    const int pos, const int rs, const int vertical)
+{
+    const VVCFrameContext *fc = lc->fc;
+    const H266RawSPS *rsps    = fc->ps.sps->r;
+    const H266RawPPS *rpps    = fc->ps.pps->r;
+    int flag;
+    if (boundary && (pos % fc->ps.sps->ctb_size_y) == 0) {
+        flag = vertical ? BOUNDARY_LEFT_SLICE : BOUNDARY_UPPER_SLICE;
+        if (lc->boundary_flags & flag &&
+            !rpps->pps_loop_filter_across_slices_enabled_flag)
+            return 0;
+
+        flag = vertical ? BOUNDARY_LEFT_TILE : BOUNDARY_UPPER_TILE;
+        if (lc->boundary_flags & flag &&
+            !rpps->pps_loop_filter_across_tiles_enabled_flag)
+            return 0;
+
+        flag = vertical ? BOUNDARY_LEFT_SUBPIC : BOUNDARY_UPPER_SUBPIC;
+        if (lc->boundary_flags & flag) {
+            const int q_rs              = rs - (vertical ? 1 : fc->ps.pps->ctb_width);
+            const SliceContext *q_slice = lc->fc->slices[lc->fc->tab.slice_idx[q_rs]];
+
+            if (!rsps->sps_loop_filter_across_subpic_enabled_flag[q_slice->sh.r->curr_subpic_idx] ||
+                !rsps->sps_loop_filter_across_subpic_enabled_flag[lc->sc->sh.r->curr_subpic_idx])
+                return 0;
+        }
+    }
+    return boundary;
+}
+
+static void vvc_deblock_bs_luma_vertical(const VVCLocalContext *lc,
+    const int x0, const int y0, const int width, const int height, const int rs)
+{
+    const VVCFrameContext *fc  = lc->fc;
+    const MvField *tab_mvf     = fc->tab.mvf;
+    const int log2_min_pu_size = MIN_PU_LOG2;
+    const int min_pu_width     = fc->ps.pps->min_pu_width;
+    const int min_cb_log2      = fc->ps.sps->min_cb_log2_size_y;
+    const int min_cb_width     = fc->ps.pps->min_cb_width;
+    const int is_intra         = tab_mvf[(y0 >> log2_min_pu_size) * min_pu_width +
+        (x0 >> log2_min_pu_size)].pred_flag == PF_INTRA;
+    int boundary_left;
+    int has_vertical_sb = 0;
+
+    const int off_q            = (y0 >> min_cb_log2) * min_cb_width + (x0 >> min_cb_log2);
+    const int cb_x             = fc->tab.cb_pos_x[LUMA][off_q];
+    const int cb_y             = fc->tab.cb_pos_y[LUMA][off_q];
+    const int cb_width         = fc->tab.cb_width[LUMA][off_q];
+    const int off_x            = cb_x - x0;
+
+    if (!is_intra) {
+        if (fc->tab.msf[off_q] || fc->tab.iaf[off_q])
+            has_vertical_sb = cb_width  > 8;
+    }
+
+    // bs for vertical TU boundaries
+    boundary_left = deblock_is_boundary(lc, x0 > 0 && !(x0 & 3), x0, rs, 1);
+
+    if (boundary_left) {
+        const RefPicList *rpl_left =
+            (lc->boundary_flags & BOUNDARY_LEFT_SLICE) ? ff_vvc_get_ref_list(fc, fc->ref, x0 - 1, y0) : lc->sc->rpl;
+        for (int i = 0; i < height; i += 4) {
+            uint8_t max_len_p, max_len_q;
+            const int bs = deblock_bs(lc, x0 - 1, y0 + i, x0, y0 + i, rpl_left, 0, off_x, has_vertical_sb);
+
+            TAB_BS(fc->tab.vertical_bs[LUMA], x0, (y0 + i)) = bs;
+
+            derive_max_filter_length_luma(fc, x0, y0 + i, is_intra, has_vertical_sb, 1, &max_len_p, &max_len_q);
+            TAB_MAX_LEN(fc->tab.vertical_p, x0, y0 + i) = max_len_p;
+            TAB_MAX_LEN(fc->tab.vertical_q, x0, y0 + i) = max_len_q;
+        }
+    }
+
+    if (!is_intra) {
+        if (fc->tab.msf[off_q] || fc->tab.iaf[off_q])
+            vvc_deblock_subblock_bs_vertical(lc, cb_x, cb_y, x0, y0, width, height);
+    }
+}
+
+static void vvc_deblock_bs_luma_horizontal(const VVCLocalContext *lc,
+    const int x0, const int y0, const int width, const int height, const int rs)
+{
+    const VVCFrameContext *fc  = lc->fc;
+    const MvField *tab_mvf     = fc->tab.mvf;
+    const int log2_min_pu_size = MIN_PU_LOG2;
+    const int min_pu_width     = fc->ps.pps->min_pu_width;
+    const int min_cb_log2      = fc->ps.sps->min_cb_log2_size_y;
+    const int min_cb_width     = fc->ps.pps->min_cb_width;
+    const int is_intra = tab_mvf[(y0 >> log2_min_pu_size) * min_pu_width +
+                           (x0 >> log2_min_pu_size)].pred_flag == PF_INTRA;
+    int boundary_upper;
+    int has_horizontal_sb = 0;
+
+    const int off_q            = (y0 >> min_cb_log2) * min_cb_width + (x0 >> min_cb_log2);
+    const int cb_x             = fc->tab.cb_pos_x[LUMA][off_q];
+    const int cb_y             = fc->tab.cb_pos_y[LUMA][off_q];
+    const int cb_height        = fc->tab.cb_height[LUMA][off_q];
+    const int off_y            = y0 - cb_y;
+
+    if (!is_intra) {
+        if (fc->tab.msf[off_q] || fc->tab.iaf[off_q])
+            has_horizontal_sb = cb_height > 8;
+    }
+
+    boundary_upper = deblock_is_boundary(lc, y0 > 0 && !(y0 & 3), y0, rs, 0);
+
+    if (boundary_upper) {
+        const RefPicList *rpl_top =
+            (lc->boundary_flags & BOUNDARY_UPPER_SLICE) ? ff_vvc_get_ref_list(fc, fc->ref, x0, y0 - 1) : lc->sc->rpl;
+
+        for (int i = 0; i < width; i += 4) {
+            uint8_t max_len_p, max_len_q;
+            const int bs = deblock_bs(lc, x0 + i, y0 - 1, x0 + i, y0, rpl_top, 0, off_y, has_horizontal_sb);
+
+            TAB_BS(fc->tab.horizontal_bs[LUMA], x0 + i, y0) = bs;
+
+            derive_max_filter_length_luma(fc, x0 + i, y0, is_intra, has_horizontal_sb, 0, &max_len_p, &max_len_q);
+            TAB_MAX_LEN(fc->tab.horizontal_p, x0 + i, y0) = max_len_p;
+            TAB_MAX_LEN(fc->tab.horizontal_q, x0 + i, y0) = max_len_q;
+        }
+    }
+
+    if (!is_intra) {
+        if (fc->tab.msf[off_q] || fc->tab.iaf[off_q])
+            vvc_deblock_subblock_bs_horizontal(lc, cb_x, cb_y, x0, y0, width, height);
+    }
+}
+
+static void vvc_deblock_bs_chroma_vertical(const VVCLocalContext *lc,
+    const int x0, const int y0, const int width, const int height, const int rs)
+{
+    const VVCFrameContext *fc = lc->fc;
+    const int boundary_left = deblock_is_boundary(lc,
+         x0 > 0 && !(x0 & ((CHROMA_GRID << fc->ps.sps->hshift[CHROMA]) - 1)), x0, rs, 1);
+
+    if (boundary_left) {
+        for (int i = 0; i < height; i += 2) {
+            for (int c_idx = CB; c_idx <= CR; c_idx++) {
+                const int bs = deblock_bs(lc, x0 - 1, y0 + i, x0, y0 + i, NULL, c_idx, 0, 0);
+
+                TAB_BS(fc->tab.vertical_bs[c_idx], x0, (y0 + i)) = bs;
+            }
+        }
+    }
+}
+
+static void vvc_deblock_bs_chroma_horizontal(const VVCLocalContext *lc,
+    const int x0, const int y0, const int width, const int height, const int rs)
+{
+    const VVCFrameContext *fc = lc->fc;
+    const int boundary_upper  = deblock_is_boundary(lc,
+        y0 > 0 && !(y0 & ((CHROMA_GRID << fc->ps.sps->vshift[CHROMA]) - 1)), y0, rs, 0);
+
+    if (boundary_upper) {
+        for (int i = 0; i < width; i += 2) {
+            for (int c_idx = CB; c_idx <= CR; c_idx++) {
+                const int bs = deblock_bs(lc, x0 + i, y0 - 1, x0 + i, y0, NULL, c_idx, 0, 0);
+
+                TAB_BS(fc->tab.horizontal_bs[c_idx], x0 + i, y0) = bs;
+            }
+        }
+    }
+}
+
+typedef void (*deblock_bs_fn)(const VVCLocalContext *lc, const int x0, const int y0,
+    const int width, const int height, const int rs);
+
+static void vvc_deblock_bs(const VVCLocalContext *lc, const int x0, const int y0, const int rs, const int vertical)
+{
+    const VVCFrameContext *fc = lc->fc;
+    const VVCSPS *sps  = fc->ps.sps;
+    const VVCPPS *pps  = fc->ps.pps;
+    const int ctb_size = sps->ctb_size_y;
+    const int x_end    = FFMIN(x0 + ctb_size, pps->width) >> MIN_TU_LOG2;
+    const int y_end    = FFMIN(y0 + ctb_size, pps->height) >> MIN_TU_LOG2;
+    deblock_bs_fn deblock_bs[2][2] = {
+        { vvc_deblock_bs_luma_horizontal, vvc_deblock_bs_chroma_horizontal },
+        { vvc_deblock_bs_luma_vertical,   vvc_deblock_bs_chroma_vertical   }
+    };
+
+    for (int is_chroma = 0; is_chroma <= 1; is_chroma++) {
+        const int hs = sps->hshift[is_chroma];
+        const int vs = sps->vshift[is_chroma];
+        for (int y = y0 >> MIN_TU_LOG2; y < y_end; y++) {
+            for (int x = x0 >> MIN_TU_LOG2; x < x_end; x++) {
+                const int off = y * fc->ps.pps->min_tu_width + x;
+                if ((fc->tab.tb_pos_x0[is_chroma][off] >> MIN_TU_LOG2) == x && (fc->tab.tb_pos_y0[is_chroma][off] >> MIN_TU_LOG2) == y) {
+                    deblock_bs[vertical][is_chroma](lc, x << MIN_TU_LOG2, y << MIN_TU_LOG2,
+                        fc->tab.tb_width[is_chroma][off] << hs, fc->tab.tb_height[is_chroma][off] << vs, rs);
+                }
+            }
+        }
+    }
+}
+
+//part of 8.8.3.3 Derivation process of transform block boundary
+static void max_filter_length_luma(const VVCFrameContext *fc, const int qx, const int qy,
+                                   const int vertical, uint8_t *max_len_p, uint8_t *max_len_q)
+{
+    const uint8_t *tab_len_p = vertical ? fc->tab.vertical_p : fc->tab.horizontal_p;
+    const uint8_t *tab_len_q = vertical ? fc->tab.vertical_q : fc->tab.horizontal_q;
+    *max_len_p = TAB_MAX_LEN(tab_len_p, qx, qy);
+    *max_len_q = TAB_MAX_LEN(tab_len_q, qx, qy);
+}
+
+//part of 8.8.3.3 Derivation process of transform block boundary
+static void max_filter_length_chroma(const VVCFrameContext *fc, const int qx, const int qy,
+                                     const int vertical, const int horizontal_ctu_edge, const int bs, uint8_t *max_len_p, uint8_t *max_len_q)
+{
+    const int px =  vertical ? qx - 1 : qx;
+    const int py = !vertical ? qy - 1 : qy;
+    const uint8_t *tb_size = vertical ? fc->tab.tb_width[CHROMA] : fc->tab.tb_height[CHROMA];
+
+    const int size_p = tb_size[(py >> MIN_TU_LOG2) * fc->ps.pps->min_tu_width + (px >> MIN_TU_LOG2)];
+    const int size_q = tb_size[(qy >> MIN_TU_LOG2) * fc->ps.pps->min_tu_width + (qx >> MIN_TU_LOG2)];
+    if (size_p >= 8 && size_q >= 8) {
+        *max_len_p = *max_len_q = 3;
+        if (horizontal_ctu_edge)
+            *max_len_p = 1;
+    } else {
+        //part of 8.8.3.6.4 Decision process for chroma block edges
+        *max_len_p = *max_len_q = (bs == 2);
+    }
+}
+
+static void max_filter_length(const VVCFrameContext *fc, const int qx, const int qy,
+    const int c_idx, const int vertical, const int horizontal_ctu_edge, const int bs, uint8_t *max_len_p, uint8_t *max_len_q)
+{
+    if (!c_idx)
+        max_filter_length_luma(fc, qx, qy, vertical, max_len_p, max_len_q);
+    else
+        max_filter_length_chroma(fc, qx, qy, vertical, horizontal_ctu_edge, bs, max_len_p, max_len_q);
+}
+
+#define TC_CALC(qp, bs)                                                 \
+    tctable[av_clip((qp) + DEFAULT_INTRA_TC_OFFSET * ((bs) - 1) +       \
+                    (tc_offset & -2),                                   \
+                    0, MAX_QP + DEFAULT_INTRA_TC_OFFSET)]
+
+// part of 8.8.3.6.2 Decision process for luma block edges
+static int get_qp_y(const VVCFrameContext *fc, const uint8_t *src, const int x, const int y, const int vertical)
+{
+    const VVCSPS *sps = fc->ps.sps;
+    const int qp      = (ff_vvc_get_qPy(fc, x - vertical, y - !vertical) + ff_vvc_get_qPy(fc, x, y) + 1) >> 1;
+    int qp_offset     = 0;
+    int level;
+
+    if (!sps->r->sps_ladf_enabled_flag)
+        return qp;
+
+    level = fc->vvcdsp.lf.ladf_level[vertical](src, fc->frame->linesize[LUMA]);
+    qp_offset = sps->r->sps_ladf_lowest_interval_qp_offset;
+    for (int i = 0; i < sps->num_ladf_intervals - 1 && level > sps->ladf_interval_lower_bound[i + 1]; i++)
+        qp_offset = sps->r->sps_ladf_qp_offset[i];
+
+    return qp + qp_offset;
+}
+
+// part of 8.8.3.6.2 Decision process for luma block edges
+static int get_qp_c(const VVCFrameContext *fc, const int x, const int y, const int c_idx, const int vertical)
+{
+    const VVCSPS *sps = fc->ps.sps;
+    return (get_qPc(fc, x - vertical, y - !vertical, c_idx) + get_qPc(fc, x, y, c_idx) - 2 * sps->qp_bd_offset + 1) >> 1;
+}
+
+static int get_qp(const VVCFrameContext *fc, const uint8_t *src, const int x, const int y, const int c_idx, const int vertical)
+{
+    if (!c_idx)
+        return get_qp_y(fc, src, x, y, vertical);
+    return get_qp_c(fc, x, y, c_idx, vertical);
+}
+
+void ff_vvc_deblock_vertical(const VVCLocalContext *lc, const int x0, const int y0, const int rs)
+{
+    VVCFrameContext *fc = lc->fc;
+    const VVCSPS *sps   = fc->ps.sps;
+    const int c_end     = sps->r->sps_chroma_format_idc ? VVC_MAX_SAMPLE_ARRAYS : 1;
+    uint8_t *src;
+    int x, y, qp;
+
+    //not use this yet, may needed by plt.
+    const uint8_t no_p[4] = { 0 };
+    const uint8_t no_q[4] = { 0 } ;
+
+    const int ctb_log2_size_y = fc->ps.sps->ctb_log2_size_y;
+    int x_end, y_end;
+    const int ctb_size = 1 << ctb_log2_size_y;
+    const DBParams *params = fc->tab.deblock + rs;
+
+    vvc_deblock_bs(lc, x0, y0, rs, 1);
+
+    x_end = x0 + ctb_size;
+    if (x_end > fc->ps.pps->width)
+        x_end = fc->ps.pps->width;
+    y_end = y0 + ctb_size;
+    if (y_end > fc->ps.pps->height)
+        y_end = fc->ps.pps->height;
+
+    for (int c_idx = 0; c_idx < c_end; c_idx++) {
+        const int hs          = sps->hshift[c_idx];
+        const int vs          = sps->vshift[c_idx];
+        const int grid        = c_idx ? (CHROMA_GRID << hs) : LUMA_GRID;
+        const int tc_offset   = params->tc_offset[c_idx];
+        const int beta_offset = params->beta_offset[c_idx];
+
+        for (y = y0; y < y_end; y += (DEBLOCK_STEP << vs)) {
+            for (x = x0 ? x0 : grid; x < x_end; x += grid) {
+                int32_t bs[4], beta[4], tc[4], all_zero_bs = 1;
+                uint8_t max_len_p[4], max_len_q[4];
+
+                for (int i = 0; i < DEBLOCK_STEP >> (2 - vs); i++) {
+                    const int dy = i << 2;
+                    bs[i] = (y + dy < y_end) ? TAB_BS(fc->tab.vertical_bs[c_idx], x, y + dy) : 0;
+                    if (bs[i]) {
+                        src = &fc->frame->data[c_idx][((y + dy) >> vs) * fc->frame->linesize[c_idx] + ((x >> hs) << fc->ps.sps->pixel_shift)];
+                        qp = get_qp(fc, src, x, y + dy, c_idx, 1);
+
+                        beta[i] = betatable[av_clip(qp + beta_offset, 0, MAX_QP)];
+
+                        max_filter_length(fc, x, y + dy, c_idx, 1, 0, bs[i], &max_len_p[i], &max_len_q[i]);
+                        all_zero_bs = 0;
+                    }
+                    tc[i] = bs[i] ? TC_CALC(qp, bs[i]) : 0;
+                }
+
+                if (!all_zero_bs) {
+                    src = &fc->frame->data[c_idx][(y >> vs) * fc->frame->linesize[c_idx] + ((x >> hs) << fc->ps.sps->pixel_shift)];
+                    if (!c_idx) {
+                        fc->vvcdsp.lf.filter_luma[1](src, fc->frame->linesize[c_idx],
+                            beta, tc, no_p, no_q, max_len_p, max_len_q, 0);
+                    } else {
+                        fc->vvcdsp.lf.filter_chroma[1](src, fc->frame->linesize[c_idx],
+                            beta, tc, no_p, no_q, max_len_p, max_len_q, vs);
+                    }
+                }
+            }
+        }
+    }
+}
+
+void ff_vvc_deblock_horizontal(const VVCLocalContext *lc, const int x0, const int y0, const int rs)
+{
+    VVCFrameContext *fc = lc->fc;
+    const VVCSPS *sps   = fc->ps.sps;
+    const int c_end     = fc->ps.sps->r->sps_chroma_format_idc ? VVC_MAX_SAMPLE_ARRAYS : 1;
+    uint8_t* src;
+    int x, y, qp;
+
+    //not use this yet, may needed by plt.
+    const uint8_t no_p[4] = { 0 };
+    const uint8_t no_q[4] = { 0 } ;
+
+    const int ctb_log2_size_y = fc->ps.sps->ctb_log2_size_y;
+    int x_end, y_end;
+    const int ctb_size = 1 << ctb_log2_size_y;
+    const DBParams *params = fc->tab.deblock + rs;
+
+    vvc_deblock_bs(lc, x0, y0, rs, 0);
+
+    x_end = x0 + ctb_size;
+    if (x_end > fc->ps.pps->width)
+        x_end = fc->ps.pps->width;
+    y_end = y0 + ctb_size;
+    if (y_end > fc->ps.pps->height)
+        y_end = fc->ps.pps->height;
+
+    for (int c_idx = 0; c_idx < c_end; c_idx++) {
+        const int hs          = sps->hshift[c_idx];
+        const int vs          = sps->vshift[c_idx];
+        const int grid        = c_idx ? (CHROMA_GRID << vs) : LUMA_GRID;
+        const int beta_offset = params->beta_offset[c_idx];
+        const int tc_offset   = params->tc_offset[c_idx];
+
+        for (y = y0; y < y_end; y += grid) {
+            const uint8_t horizontal_ctu_edge = !(y % fc->ps.sps->ctb_size_y);
+            if (!y)
+                continue;
+
+            for (x = x0 ? x0: 0; x < x_end; x += (DEBLOCK_STEP << hs)) {
+                int32_t bs[4], beta[4], tc[4], all_zero_bs = 1;
+                uint8_t max_len_p[4], max_len_q[4];
+
+                for (int i = 0; i < DEBLOCK_STEP >> (2 - hs); i++) {
+                    const int dx = i << 2;
+
+                    bs[i] = (x + dx < x_end) ? TAB_BS(fc->tab.horizontal_bs[c_idx], x + dx, y) : 0;
+                    if (bs[i]) {
+                        src = &fc->frame->data[c_idx][(y >> vs) * fc->frame->linesize[c_idx] + (((x + dx)>> hs) << fc->ps.sps->pixel_shift)];
+                        qp = get_qp(fc, src, x + dx, y, c_idx, 0);
+
+                        beta[i] = betatable[av_clip(qp + beta_offset, 0, MAX_QP)];
+
+                        max_filter_length(fc, x + dx, y, c_idx, 0, horizontal_ctu_edge, bs[i], &max_len_p[i], &max_len_q[i]);
+                        all_zero_bs = 0;
+                    }
+                    tc[i] = bs[i] ? TC_CALC(qp, bs[i]) : 0;
+                }
+                if (!all_zero_bs) {
+                    src = &fc->frame->data[c_idx][(y >> vs) * fc->frame->linesize[c_idx] + ((x >> hs) << fc->ps.sps->pixel_shift)];
+                    if (!c_idx) {
+                        fc->vvcdsp.lf.filter_luma[0](src, fc->frame->linesize[c_idx],
+                            beta, tc, no_p, no_q, max_len_p, max_len_q, horizontal_ctu_edge);
+                    } else {
+                        fc->vvcdsp.lf.filter_chroma[0](src, fc->frame->linesize[c_idx],
+                            beta, tc, no_p, no_q, max_len_p, max_len_q, hs);
+                    }
+                }
+            }
+        }
+    }
+}
+
+static void alf_copy_border(uint8_t *dst, const uint8_t *src,
+    const int pixel_shift, int width, const int height, const ptrdiff_t dst_stride, const ptrdiff_t src_stride)
+{
+    width <<= pixel_shift;
+    for (int i = 0; i < height; i++) {
+        memcpy(dst, src, width);
+        dst += dst_stride;
+        src += src_stride;
+    }
+}
+
+static void alf_extend_vert(uint8_t *_dst, const uint8_t *_src,
+    const int pixel_shift, const int width, const int height, ptrdiff_t stride)
+{
+    if (pixel_shift == 0) {
+        for (int i = 0; i < height; i++) {
+            memset(_dst, *_src, width);
+            _src += stride;
+            _dst += stride;
+        }
+    } else {
+        const uint16_t *src = (const uint16_t *)_src;
+        uint16_t *dst = (uint16_t *)_dst;
+        stride >>= pixel_shift;
+
+        for (int i = 0; i < height; i++) {
+            for (int j = 0; j < width; j++)
+                dst[j] = *src;
+            src += stride;
+            dst += stride;
+        }
+    }
+}
+
+static void alf_extend_horz(uint8_t *dst, const uint8_t *src,
+    const int pixel_shift, int width, const int height, const ptrdiff_t stride)
+{
+    width <<= pixel_shift;
+    for (int i = 0; i < height; i++) {
+        memcpy(dst, src, width);
+        dst += stride;
+    }
+}
+
+static void alf_copy_ctb_to_hv(VVCFrameContext *fc, const uint8_t *src, const ptrdiff_t src_stride,
+    const int x, const int y, const int width, const int height, const int rx, const int ry, const int c_idx)
+{
+    const int ps            = fc->ps.sps->pixel_shift;
+    const int w             = fc->ps.pps->width >> fc->ps.sps->hshift[c_idx];
+    const int h             = fc->ps.pps->height >> fc->ps.sps->vshift[c_idx];
+    const int border_pixels = (c_idx == 0) ? ALF_BORDER_LUMA : ALF_BORDER_CHROMA;
+    const int offset_h[]    = { 0, height - border_pixels };
+    const int offset_v[]    = { 0, width  - border_pixels };
+
+    /* copy horizontal edges */
+    for (int i = 0; i < FF_ARRAY_ELEMS(offset_h); i++) {
+        alf_copy_border(fc->tab.alf_pixel_buffer_h[c_idx][i] + ((border_pixels * ry * w + x)<< ps),
+            src + offset_h[i] * src_stride, ps, width, border_pixels, w << ps, src_stride);
+    }
+    /* copy vertical edges */
+    for (int i = 0; i < FF_ARRAY_ELEMS(offset_v); i++) {
+        alf_copy_border(fc->tab.alf_pixel_buffer_v[c_idx][i] + ((h * rx + y) * (border_pixels << ps)),
+            src + (offset_v[i] << ps), ps, border_pixels, height, border_pixels << ps, src_stride);
+    }
+}
+
+static void alf_fill_border_h(uint8_t *dst, const ptrdiff_t dst_stride, const uint8_t *src, const ptrdiff_t src_stride,
+    const uint8_t *border, const int width, const int border_pixels, const int ps, const int edge)
+{
+    if (edge)
+        alf_extend_horz(dst, border, ps, width, border_pixels, dst_stride);
+    else
+        alf_copy_border(dst, src, ps, width, border_pixels, dst_stride, src_stride);
+}
+
+static void alf_fill_border_v(uint8_t *dst, const ptrdiff_t dst_stride, const uint8_t *src,
+    const uint8_t *border, const int border_pixels, const int height, const int pixel_shift, const int *edges, const int edge)
+{
+    const ptrdiff_t src_stride = (border_pixels << pixel_shift);
+
+    if (edge) {
+        alf_extend_vert(dst, border, pixel_shift, border_pixels, height + 2 * border_pixels, dst_stride);
+        return;
+    }
+
+    //left/right
+    alf_copy_border(dst + dst_stride * border_pixels * edges[TOP], src + src_stride * border_pixels * edges[TOP],
+        pixel_shift, border_pixels, height + (!edges[TOP] + !edges[BOTTOM]) * border_pixels, dst_stride, src_stride);
+
+    //top left/right
+    if (edges[TOP])
+        alf_extend_horz(dst, dst + dst_stride * border_pixels, pixel_shift, border_pixels, border_pixels, dst_stride);
+
+    //bottom left/right
+    if (edges[BOTTOM]) {
+        dst += dst_stride * (border_pixels + height);
+        alf_extend_horz(dst, dst - dst_stride, pixel_shift, border_pixels, border_pixels, dst_stride);
+    }
+}
+
+static void alf_prepare_buffer(VVCFrameContext *fc, uint8_t *_dst, const uint8_t *_src, const int x, const int y,
+    const int rx, const int ry, const int width, const int height, const ptrdiff_t dst_stride, const ptrdiff_t src_stride,
+    const int c_idx, const int *edges)
+{
+    const int ps = fc->ps.sps->pixel_shift;
+    const int w = fc->ps.pps->width >> fc->ps.sps->hshift[c_idx];
+    const int h = fc->ps.pps->height >> fc->ps.sps->vshift[c_idx];
+    const int border_pixels = c_idx == 0 ? ALF_BORDER_LUMA : ALF_BORDER_CHROMA;
+    uint8_t *dst, *src;
+
+    copy_ctb(_dst, _src, width << ps, height, dst_stride, src_stride);
+
+    //top
+    src = fc->tab.alf_pixel_buffer_h[c_idx][1] + (((border_pixels * w) << ps) * (ry - 1) + (x << ps));
+    dst = _dst - border_pixels * dst_stride;
+    alf_fill_border_h(dst, dst_stride, src, w  << ps, _dst, width, border_pixels, ps, edges[TOP]);
+
+    //bottom
+    src = fc->tab.alf_pixel_buffer_h[c_idx][0] + (((border_pixels * w) << ps) * (ry + 1) + (x << ps));
+    dst = _dst + height * dst_stride;
+    alf_fill_border_h(dst, dst_stride, src, w  << ps, _dst + (height - 1) * dst_stride, width, border_pixels, ps, edges[BOTTOM]);
+
+
+    //left
+    src = fc->tab.alf_pixel_buffer_v[c_idx][1] + (h * (rx - 1) + y - border_pixels) * (border_pixels << ps);
+    dst = _dst - (border_pixels << ps) - border_pixels * dst_stride;
+    alf_fill_border_v(dst, dst_stride, src,  dst + (border_pixels << ps), border_pixels, height, ps, edges, edges[LEFT]);
+
+    //right
+    src = fc->tab.alf_pixel_buffer_v[c_idx][0] + (h * (rx + 1) + y - border_pixels) * (border_pixels << ps);
+    dst = _dst + (width << ps) - border_pixels * dst_stride;
+    alf_fill_border_v(dst, dst_stride, src,  dst - (1 << ps), border_pixels, height, ps, edges, edges[RIGHT]);
+}
+
+#define ALF_MAX_BLOCKS_IN_CTU   (MAX_CTU_SIZE * MAX_CTU_SIZE / ALF_BLOCK_SIZE / ALF_BLOCK_SIZE)
+#define ALF_MAX_FILTER_SIZE     (ALF_MAX_BLOCKS_IN_CTU * ALF_NUM_COEFF_LUMA)
+
+static void alf_get_coeff_and_clip(VVCLocalContext *lc, int16_t *coeff, int16_t *clip,
+    const uint8_t *src, ptrdiff_t src_stride, int width, int height, int vb_pos, ALFParams *alf)
+{
+    const VVCFrameContext *fc     = lc->fc;
+    const H266RawSliceHeader *rsh = lc->sc->sh.r;
+    uint8_t fixed_clip_set[ALF_NUM_FILTERS_LUMA][ALF_NUM_COEFF_LUMA] = { 0 };
+    const int16_t *coeff_set;
+    const uint8_t *clip_idx_set;
+    const uint8_t *class_to_filt;
+    const int size = width * height / ALF_BLOCK_SIZE / ALF_BLOCK_SIZE;
+    int class_idx[ALF_MAX_BLOCKS_IN_CTU];
+    int transpose_idx[ALF_MAX_BLOCKS_IN_CTU];
+
+    if (alf->ctb_filt_set_idx_y < 16) {
+        coeff_set         = &ff_vvc_alf_fix_filt_coeff[0][0];
+        clip_idx_set      = &fixed_clip_set[0][0];
+        class_to_filt     = ff_vvc_alf_class_to_filt_map[alf->ctb_filt_set_idx_y];
+    } else {
+        const int id      = rsh->sh_alf_aps_id_luma[alf->ctb_filt_set_idx_y - 16];
+        const VVCALF *aps = fc->ps.alf_list[id];
+        coeff_set         = &aps->luma_coeff[0][0];
+        clip_idx_set      = &aps->luma_clip_idx[0][0];
+        class_to_filt     = ff_vvc_alf_aps_class_to_filt_map;
+    }
+    fc->vvcdsp.alf.classify(class_idx, transpose_idx, src, src_stride, width, height,
+        vb_pos, lc->alf_gradient_tmp);
+    fc->vvcdsp.alf.recon_coeff_and_clip(coeff, clip, class_idx, transpose_idx, size,
+        coeff_set, clip_idx_set, class_to_filt);
+}
+
+static void alf_filter_luma(VVCLocalContext *lc, uint8_t *dst, const uint8_t *src,
+    const ptrdiff_t dst_stride, const ptrdiff_t src_stride, const int x0, const int y0,
+    const int width, const int height, const int _vb_pos, ALFParams *alf)
+{
+    const VVCFrameContext *fc = lc->fc;
+    int vb_pos                = _vb_pos - y0;
+    int16_t *coeff            = (int16_t*)lc->tmp;
+    int16_t *clip             = (int16_t *)lc->tmp1;
+
+    av_assert0(ALF_MAX_FILTER_SIZE <= sizeof(lc->tmp));
+    av_assert0(ALF_MAX_FILTER_SIZE * sizeof(int16_t) <= sizeof(lc->tmp1));
+
+    alf_get_coeff_and_clip(lc, coeff, clip, src, src_stride, width, height, vb_pos, alf);
+    fc->vvcdsp.alf.filter[LUMA](dst, dst_stride, src, src_stride, width, height, coeff, clip, vb_pos);
+}
+
+static int alf_clip_from_idx(const VVCFrameContext *fc, const int idx)
+{
+    const VVCSPS *sps  = fc->ps.sps;
+    const int offset[] = {0, 3, 5, 7};
+
+    return 1 << (sps->bit_depth - offset[idx]);
+}
+
+static void alf_filter_chroma(VVCLocalContext *lc, uint8_t *dst, const uint8_t *src,
+    const ptrdiff_t dst_stride, const ptrdiff_t src_stride, const int c_idx,
+    const int width, const int height, const int vb_pos, ALFParams *alf)
+{
+    VVCFrameContext *fc           = lc->fc;
+    const H266RawSliceHeader *rsh = lc->sc->sh.r;
+    const VVCALF *aps             = fc->ps.alf_list[rsh->sh_alf_aps_id_chroma];
+    const int idx                 = alf->alf_ctb_filter_alt_idx[c_idx - 1];
+    const int16_t *coeff          = aps->chroma_coeff[idx];
+    int16_t clip[ALF_NUM_COEFF_CHROMA];
+
+    for (int i = 0; i < ALF_NUM_COEFF_CHROMA; i++)
+        clip[i] = alf_clip_from_idx(fc, aps->chroma_clip_idx[idx][i]);
+
+    fc->vvcdsp.alf.filter[CHROMA](dst, dst_stride, src, src_stride, width, height, coeff, clip, vb_pos);
+}
+
+static void alf_filter_cc(VVCLocalContext *lc, uint8_t *dst, const uint8_t *luma,
+    const ptrdiff_t dst_stride, const ptrdiff_t luma_stride, const int c_idx,
+    const int width, const int height, const int hs, const int vs, const int vb_pos, ALFParams *alf)
+{
+    const VVCFrameContext *fc     = lc->fc;
+    const H266RawSliceHeader *rsh = lc->sc->sh.r;
+    const int idx                 = c_idx - 1;
+    const int cc_aps_id           = c_idx == CB ? rsh->sh_alf_cc_cb_aps_id : rsh->sh_alf_cc_cr_aps_id;
+    const VVCALF *aps             = fc->ps.alf_list[cc_aps_id];
+
+    if (aps) {
+        const int16_t *coeff = aps->cc_coeff[idx][alf->ctb_cc_idc[idx] - 1];
+
+        fc->vvcdsp.alf.filter_cc(dst, dst_stride, luma, luma_stride, width, height, hs, vs, coeff, vb_pos);
+    }
+}
+
+void ff_vvc_alf_copy_ctu_to_hv(VVCLocalContext* lc, const int x0, const int y0)
+{
+    VVCFrameContext *fc  = lc->fc;
+    const int rx         = x0 >> fc->ps.sps->ctb_log2_size_y;
+    const int ry         = y0 >> fc->ps.sps->ctb_log2_size_y;
+    const int ctb_size_y = fc->ps.sps->ctb_size_y;
+    const int ps         = fc->ps.sps->pixel_shift;
+    const int c_end      = fc->ps.sps->r->sps_chroma_format_idc ? VVC_MAX_SAMPLE_ARRAYS : 1;
+
+    for (int c_idx = 0; c_idx < c_end; c_idx++) {
+        const int hs     = fc->ps.sps->hshift[c_idx];
+        const int vs     = fc->ps.sps->vshift[c_idx];
+        const int x      = x0 >> hs;
+        const int y      = y0 >> vs;
+        const int width  = FFMIN(fc->ps.pps->width - x0, ctb_size_y) >> hs;
+        const int height = FFMIN(fc->ps.pps->height - y0, ctb_size_y) >> vs;
+
+        const int src_stride = fc->frame->linesize[c_idx];
+        uint8_t* src = &fc->frame->data[c_idx][y * src_stride + (x << ps)];
+
+        alf_copy_ctb_to_hv(fc, src, src_stride, x, y, width, height, rx, ry, c_idx);
+    }
+}
+
+void ff_vvc_alf_filter(VVCLocalContext *lc, const int x0, const int y0)
+{
+    VVCFrameContext *fc     = lc->fc;
+    const VVCSPS *sps       = fc->ps.sps;
+    const VVCPPS *pps       = fc->ps.pps;
+    const int rx            = x0 >> fc->ps.sps->ctb_log2_size_y;
+    const int ry            = y0 >> fc->ps.sps->ctb_log2_size_y;
+    const int ctb_size_y    = fc->ps.sps->ctb_size_y;
+    const int ps            = fc->ps.sps->pixel_shift;
+    const int padded_stride = EDGE_EMU_BUFFER_STRIDE << ps;
+    const int padded_offset = padded_stride * ALF_PADDING_SIZE + (ALF_PADDING_SIZE << ps);
+    const int c_end         = fc->ps.sps->r->sps_chroma_format_idc ? VVC_MAX_SAMPLE_ARRAYS : 1;
+    const int subpic_idx    = lc->sc->sh.r->curr_subpic_idx;
+    ALFParams *alf          = &CTB(fc->tab.alf, rx, ry);
+    int edges[MAX_EDGES]    = { rx == 0, ry == 0, rx == pps->ctb_width - 1, ry == pps->ctb_height - 1 };
+
+    if (!pps->r->pps_loop_filter_across_tiles_enabled_flag) {
+        edges[LEFT]   = edges[LEFT] || (lc->boundary_flags & BOUNDARY_LEFT_TILE);
+        edges[TOP]    = edges[TOP] || (lc->boundary_flags & BOUNDARY_UPPER_TILE);
+        edges[RIGHT]  = edges[RIGHT] || pps->ctb_to_col_bd[rx] != pps->ctb_to_col_bd[rx + 1];
+        edges[BOTTOM] = edges[BOTTOM] || pps->ctb_to_row_bd[ry] != pps->ctb_to_row_bd[ry + 1];
+    }
+
+    if (!pps->r->pps_loop_filter_across_slices_enabled_flag) {
+        edges[LEFT]   = edges[LEFT] || (lc->boundary_flags & BOUNDARY_LEFT_SLICE);
+        edges[TOP]    = edges[TOP] || (lc->boundary_flags & BOUNDARY_UPPER_SLICE);
+        edges[RIGHT]  = edges[RIGHT] || CTB(fc->tab.slice_idx, rx, ry) != CTB(fc->tab.slice_idx, rx + 1, ry);
+        edges[BOTTOM] = edges[BOTTOM] || CTB(fc->tab.slice_idx, rx, ry) != CTB(fc->tab.slice_idx, rx, ry + 1);
+    }
+
+    if (!sps->r->sps_loop_filter_across_subpic_enabled_flag[subpic_idx]) {
+        edges[LEFT]   = edges[LEFT] || (lc->boundary_flags & BOUNDARY_LEFT_SUBPIC);
+        edges[TOP]    = edges[TOP] || (lc->boundary_flags & BOUNDARY_UPPER_SUBPIC);
+        edges[RIGHT]  = edges[RIGHT] || fc->ps.sps->r->sps_subpic_ctu_top_left_x[subpic_idx] + fc->ps.sps->r->sps_subpic_width_minus1[subpic_idx] == rx;
+        edges[BOTTOM] = edges[BOTTOM] || fc->ps.sps->r->sps_subpic_ctu_top_left_y[subpic_idx] + fc->ps.sps->r->sps_subpic_height_minus1[subpic_idx] == ry;
+    }
+
+    for (int c_idx = 0; c_idx < c_end; c_idx++) {
+        const int hs = fc->ps.sps->hshift[c_idx];
+        const int vs = fc->ps.sps->vshift[c_idx];
+        const int ctb_size_h = ctb_size_y >> hs;
+        const int ctb_size_v = ctb_size_y >> vs;
+        const int x = x0 >> hs;
+        const int y = y0 >> vs;
+        const int pic_width = fc->ps.pps->width >> hs;
+        const int pic_height = fc->ps.pps->height >> vs;
+        const int width  = FFMIN(pic_width  - x, ctb_size_h);
+        const int height = FFMIN(pic_height - y, ctb_size_v);
+        const int src_stride = fc->frame->linesize[c_idx];
+        uint8_t *src = &fc->frame->data[c_idx][y * src_stride + (x << ps)];
+        uint8_t *padded;
+
+        if (alf->ctb_flag[c_idx] || (!c_idx && (alf->ctb_cc_idc[0] || alf->ctb_cc_idc[1]))) {
+            padded = (c_idx ? lc->alf_buffer_chroma : lc->alf_buffer_luma) + padded_offset;
+            alf_prepare_buffer(fc, padded, src, x, y, rx, ry, width, height,
+                padded_stride, src_stride, c_idx, edges);
+        }
+        if (alf->ctb_flag[c_idx]) {
+            if (!c_idx)  {
+                alf_filter_luma(lc, src, padded, src_stride, padded_stride, x, y,
+                    width, height, y + ctb_size_v - ALF_VB_POS_ABOVE_LUMA, alf);
+            } else {
+                alf_filter_chroma(lc, src, padded, src_stride, padded_stride, c_idx,
+                    width, height, ctb_size_v - ALF_VB_POS_ABOVE_CHROMA, alf);
+            }
+        }
+        if (c_idx && alf->ctb_cc_idc[c_idx - 1]) {
+            padded = lc->alf_buffer_luma + padded_offset;
+            alf_filter_cc(lc, src, padded, src_stride, padded_stride, c_idx,
+                width, height, hs, vs, (ctb_size_v << vs) - ALF_VB_POS_ABOVE_LUMA, alf);
+        }
+
+        alf->applied[c_idx] = 1;
+    }
+}
+
+
+void ff_vvc_lmcs_filter(const VVCLocalContext *lc, const int x, const int y)
+{
+    const SliceContext *sc = lc->sc;
+    const VVCFrameContext *fc = lc->fc;
+    const int ctb_size = fc->ps.sps->ctb_size_y;
+    const int width    = FFMIN(fc->ps.pps->width  - x, ctb_size);
+    const int height   = FFMIN(fc->ps.pps->height - y, ctb_size);
+    uint8_t *data      = fc->frame->data[LUMA] + y * fc->frame->linesize[LUMA] + (x << fc->ps.sps->pixel_shift);
+    if (sc->sh.r->sh_lmcs_used_flag)
+        fc->vvcdsp.lmcs.filter(data, fc->frame->linesize[LUMA], width, height, &fc->ps.lmcs.inv_lut);
+}