mirror of
https://github.com/FFmpeg/FFmpeg.git
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vvcdec: add intra prediction
Co-authored-by: Xu Mu <toxumu@outlook.com> Co-authored-by: Frank Plowman <post@frankplowman.com> Co-authored-by: Shaun Loo <shaunloo10@gmail.com> Co-authored-by: Wu Jianhua <toqsxw@outlook.com>
This commit is contained in:
Nuo Mi
parent
2592cc1f96
commit
c05ba94ce8
@ -5,6 +5,7 @@ OBJS-$(CONFIG_VVC_DECODER) += vvc/vvc_cabac.o \
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vvc/vvc_ctu.o \
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vvc/vvc_data.o \
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vvc/vvc_inter.o \
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vvc/vvc_intra.o \
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vvc/vvc_itx_1d.o \
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vvc/vvc_mvs.o \
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vvc/vvc_ps.o \
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@ -20,10 +20,41 @@
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavcodec/refstruct.h"
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#include "vvc_cabac.h"
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#include "vvc_ctu.h"
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#include "vvc_mvs.h"
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void ff_vvc_decode_neighbour(VVCLocalContext *lc, const int x_ctb, const int y_ctb,
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const int rx, const int ry, const int rs)
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{
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VVCFrameContext *fc = lc->fc;
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const int ctb_size = fc->ps.sps->ctb_size_y;
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lc->end_of_tiles_x = fc->ps.sps->width;
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lc->end_of_tiles_y = fc->ps.sps->height;
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if (fc->ps.pps->ctb_to_col_bd[rx] != fc->ps.pps->ctb_to_col_bd[rx + 1])
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lc->end_of_tiles_x = FFMIN(x_ctb + ctb_size, lc->end_of_tiles_x);
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if (fc->ps.pps->ctb_to_row_bd[ry] != fc->ps.pps->ctb_to_row_bd[ry + 1])
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lc->end_of_tiles_y = FFMIN(y_ctb + ctb_size, lc->end_of_tiles_y);
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lc->boundary_flags = 0;
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if (rx > 0 && fc->ps.pps->ctb_to_col_bd[rx] != fc->ps.pps->ctb_to_col_bd[rx - 1])
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lc->boundary_flags |= BOUNDARY_LEFT_TILE;
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if (rx > 0 && fc->tab.slice_idx[rs] != fc->tab.slice_idx[rs - 1])
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lc->boundary_flags |= BOUNDARY_LEFT_SLICE;
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if (ry > 0 && fc->ps.pps->ctb_to_row_bd[ry] != fc->ps.pps->ctb_to_row_bd[ry - 1])
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lc->boundary_flags |= BOUNDARY_UPPER_TILE;
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if (ry > 0 && fc->tab.slice_idx[rs] != fc->tab.slice_idx[rs - fc->ps.pps->ctb_width])
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lc->boundary_flags |= BOUNDARY_UPPER_SLICE;
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lc->ctb_left_flag = rx > 0 && !(lc->boundary_flags & BOUNDARY_LEFT_TILE);
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lc->ctb_up_flag = ry > 0 && !(lc->boundary_flags & BOUNDARY_UPPER_TILE) && !(lc->boundary_flags & BOUNDARY_UPPER_SLICE);
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lc->ctb_up_right_flag = lc->ctb_up_flag && (fc->ps.pps->ctb_to_col_bd[rx] == fc->ps.pps->ctb_to_col_bd[rx + 1]) &&
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(fc->ps.pps->ctb_to_row_bd[ry] == fc->ps.pps->ctb_to_row_bd[ry - 1]);
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lc->ctb_up_left_flag = lc->ctb_left_flag && lc->ctb_up_flag;
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}
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void ff_vvc_set_neighbour_available(VVCLocalContext *lc,
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const int x0, const int y0, const int w, const int h)
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{
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@ -39,6 +70,25 @@ void ff_vvc_set_neighbour_available(VVCLocalContext *lc,
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lc->na.cand_up_right = lc->na.cand_up_right_sap && (x0 + w) < lc->end_of_tiles_x;
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}
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void ff_vvc_ctu_free_cus(CTU *ctu)
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{
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CodingUnit **cus = &ctu->cus;
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while (*cus) {
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CodingUnit *cu = *cus;
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TransformUnit **head = &cu->tus.head;
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*cus = cu->next;
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while (*head) {
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TransformUnit *tu = *head;
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*head = tu->next;
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ff_refstruct_unref(&tu);
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}
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cu->tus.tail = NULL;
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ff_refstruct_unref(&cu);
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}
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}
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void ff_vvc_ep_init_stat_coeff(EntryPoint *ep,
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const int bit_depth, const int persistent_rice_adaptation_enabled_flag)
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@ -461,6 +461,8 @@ typedef struct ALFParams {
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//utils
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void ff_vvc_set_neighbour_available(VVCLocalContext *lc, int x0, int y0, int w, int h);
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void ff_vvc_decode_neighbour(VVCLocalContext *lc, int x_ctb, int y_ctb, int rx, int ry, int rs);
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void ff_vvc_ctu_free_cus(CTU *ctu);
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void ff_vvc_ep_init_stat_coeff(EntryPoint *ep, int bit_depth, int persistent_rice_adaptation_enabled_flag);
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#endif // AVCODEC_VVC_VVC_CTU_H
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797
libavcodec/vvc/vvc_intra.c
Normal file
797
libavcodec/vvc/vvc_intra.c
Normal file
@ -0,0 +1,797 @@
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/*
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* VVC intra prediction
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*
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* Copyright (C) 2021 Nuo Mi
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/frame.h"
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#include "vvc_data.h"
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#include "vvc_inter.h"
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#include "vvc_intra.h"
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#include "vvc_itx_1d.h"
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static int is_cclm(enum IntraPredMode mode)
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{
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return mode == INTRA_LT_CCLM || mode == INTRA_L_CCLM || mode == INTRA_T_CCLM;
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}
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static int derive_ilfnst_pred_mode_intra(const VVCLocalContext *lc, const TransformBlock *tb)
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{
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const VVCFrameContext *fc = lc->fc;
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const VVCSPS *sps = fc->ps.sps;
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const CodingUnit *cu = lc->cu;
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const int x_tb = tb->x0 >> fc->ps.sps->min_cb_log2_size_y;
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const int y_tb = tb->y0 >> fc->ps.sps->min_cb_log2_size_y;
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const int x_c = (tb->x0 + (tb->tb_width << sps->hshift[1] >> 1) ) >> fc->ps.sps->min_cb_log2_size_y;
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const int y_c = (tb->y0 + (tb->tb_height << sps->vshift[1] >> 1)) >> fc->ps.sps->min_cb_log2_size_y;
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const int min_cb_width = fc->ps.pps->min_cb_width;
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const int intra_mip_flag = SAMPLE_CTB(fc->tab.imf, x_tb, y_tb);
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int pred_mode_intra = tb->c_idx == 0 ? cu->intra_pred_mode_y : cu->intra_pred_mode_c;
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if (intra_mip_flag && !tb->c_idx) {
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pred_mode_intra = INTRA_PLANAR;
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} else if (is_cclm(pred_mode_intra)) {
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int intra_mip_flag_c = SAMPLE_CTB(fc->tab.imf, x_c, y_c);
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int cu_pred_mode = SAMPLE_CTB(fc->tab.cpm[0], x_c, y_c);
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if (intra_mip_flag_c) {
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pred_mode_intra = INTRA_PLANAR;
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} else if (cu_pred_mode == MODE_IBC || cu_pred_mode == MODE_PLT) {
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pred_mode_intra = INTRA_DC;
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} else {
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pred_mode_intra = SAMPLE_CTB(fc->tab.ipm, x_c, y_c);
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}
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}
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pred_mode_intra = ff_vvc_wide_angle_mode_mapping(cu, tb->tb_width, tb->tb_height, tb->c_idx, pred_mode_intra);
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return pred_mode_intra;
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}
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//8.7.4 Transformation process for scaled transform coefficients
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static void ilfnst_transform(const VVCLocalContext *lc, TransformBlock *tb)
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{
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const VVCSPS *sps = lc->fc->ps.sps;
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const CodingUnit *cu = lc->cu;
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const int w = tb->tb_width;
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const int h = tb->tb_height;
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const int n_lfnst_out_size = (w >= 8 && h >= 8) ? 48 : 16; ///< nLfnstOutSize
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const int log2_lfnst_size = (w >= 8 && h >= 8) ? 3 : 2; ///< log2LfnstSize
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const int n_lfnst_size = 1 << log2_lfnst_size; ///< nLfnstSize
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const int non_zero_size = ((w == 8 && h == 8) || (w == 4 && h == 4)) ? 8 : 16; ///< nonZeroSize
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const int pred_mode_intra = derive_ilfnst_pred_mode_intra(lc, tb);
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const int transpose = pred_mode_intra > 34;
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int u[16], v[48];
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for (int x = 0; x < non_zero_size; x++) {
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int xc = ff_vvc_diag_scan_x[2][2][x];
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int yc = ff_vvc_diag_scan_y[2][2][x];
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u[x] = tb->coeffs[w * yc + xc];
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}
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ff_vvc_inv_lfnst_1d(v, u, non_zero_size, n_lfnst_out_size, pred_mode_intra,
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cu->lfnst_idx, sps->log2_transform_range);
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if (transpose) {
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int *dst = tb->coeffs;
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const int *src = v;
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if (n_lfnst_size == 4) {
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for (int y = 0; y < 4; y++) {
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dst[0] = src[0];
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dst[1] = src[4];
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dst[2] = src[8];
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dst[3] = src[12];
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src++;
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dst += w;
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}
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} else {
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for (int y = 0; y < 8; y++) {
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dst[0] = src[0];
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dst[1] = src[8];
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dst[2] = src[16];
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dst[3] = src[24];
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if (y < 4) {
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dst[4] = src[32];
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dst[5] = src[36];
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dst[6] = src[40];
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dst[7] = src[44];
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}
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src++;
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dst += w;
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}
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}
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} else {
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int *dst = tb->coeffs;
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const int *src = v;
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for (int y = 0; y < n_lfnst_size; y++) {
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int size = (y < 4) ? n_lfnst_size : 4;
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memcpy(dst, src, size * sizeof(int));
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src += size;
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dst += w;
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}
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}
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tb->max_scan_x = n_lfnst_size - 1;
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tb->max_scan_y = n_lfnst_size - 1;
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}
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//part of 8.7.4 Transformation process for scaled transform coefficients
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static void derive_transform_type(const VVCFrameContext *fc, const VVCLocalContext *lc, const TransformBlock *tb, enum TxType *trh, enum TxType *trv)
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{
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const CodingUnit *cu = lc->cu;
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static const enum TxType mts_to_trh[] = {DCT2, DST7, DCT8, DST7, DCT8};
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static const enum TxType mts_to_trv[] = {DCT2, DST7, DST7, DCT8, DCT8};
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const VVCSPS *sps = fc->ps.sps;
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int implicit_mts_enabled = 0;
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if (tb->c_idx || (cu->isp_split_type != ISP_NO_SPLIT && cu->lfnst_idx)) {
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*trh = *trv = DCT2;
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return;
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}
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if (sps->r->sps_mts_enabled_flag) {
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if (cu->isp_split_type != ISP_NO_SPLIT ||
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(cu->sbt_flag && FFMAX(tb->tb_width, tb->tb_height) <= 32) ||
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(!sps->r->sps_explicit_mts_intra_enabled_flag && cu->pred_mode == MODE_INTRA &&
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!cu->lfnst_idx && !cu->intra_mip_flag)) {
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implicit_mts_enabled = 1;
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}
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}
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if (implicit_mts_enabled) {
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const int w = tb->tb_width;
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const int h = tb->tb_height;
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if (cu->sbt_flag) {
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*trh = (cu->sbt_horizontal_flag || cu->sbt_pos_flag) ? DST7 : DCT8;
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*trv = (!cu->sbt_horizontal_flag || cu->sbt_pos_flag) ? DST7 : DCT8;
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} else {
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*trh = (w >= 4 && w <= 16) ? DST7 : DCT2;
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*trv = (h >= 4 && h <= 16) ? DST7 : DCT2;
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}
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return;
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}
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*trh = mts_to_trh[cu->mts_idx];
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*trv = mts_to_trv[cu->mts_idx];
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}
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static void add_residual_for_joint_coding_chroma(VVCLocalContext *lc,
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const TransformUnit *tu, TransformBlock *tb, const int chroma_scale)
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{
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const VVCFrameContext *fc = lc->fc;
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const CodingUnit *cu = lc->cu;
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const int c_sign = 1 - 2 * fc->ps.ph.r->ph_joint_cbcr_sign_flag;
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const int shift = tu->coded_flag[1] ^ tu->coded_flag[2];
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const int c_idx = 1 + tu->coded_flag[1];
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const ptrdiff_t stride = fc->frame->linesize[c_idx];
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const int hs = fc->ps.sps->hshift[c_idx];
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const int vs = fc->ps.sps->vshift[c_idx];
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uint8_t *dst = &fc->frame->data[c_idx][(tb->y0 >> vs) * stride +
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((tb->x0 >> hs) << fc->ps.sps->pixel_shift)];
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if (chroma_scale) {
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fc->vvcdsp.itx.pred_residual_joint(tb->coeffs, tb->tb_width, tb->tb_height, c_sign, shift);
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fc->vvcdsp.intra.lmcs_scale_chroma(lc, tb->coeffs, tb->coeffs, tb->tb_width, tb->tb_height, cu->x0, cu->y0);
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fc->vvcdsp.itx.add_residual(dst, tb->coeffs, tb->tb_width, tb->tb_height, stride);
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} else {
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fc->vvcdsp.itx.add_residual_joint(dst, tb->coeffs, tb->tb_width, tb->tb_height, stride, c_sign, shift);
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}
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}
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static int add_reconstructed_area(VVCLocalContext *lc, const int ch_type, const int x0, const int y0, const int w, const int h)
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{
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const VVCSPS *sps = lc->fc->ps.sps;
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const int hs = sps->hshift[ch_type];
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const int vs = sps->vshift[ch_type];
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ReconstructedArea *a;
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if (lc->num_ras[ch_type] >= FF_ARRAY_ELEMS(lc->ras[ch_type]))
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return AVERROR_INVALIDDATA;
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a = &lc->ras[ch_type][lc->num_ras[ch_type]];
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a->x = x0 >> hs;
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a->y = y0 >> vs;
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a->w = w >> hs;
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a->h = h >> vs;
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lc->num_ras[ch_type]++;
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return 0;
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}
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static void add_tu_area(const TransformUnit *tu, int *x0, int *y0, int *w, int *h)
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{
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*x0 = tu->x0;
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*y0 = tu->y0;
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*w = tu->width;
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*h = tu->height;
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}
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#define MIN_ISP_PRED_WIDTH 4
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static int get_luma_predict_unit(const CodingUnit *cu, const TransformUnit *tu, const int idx, int *x0, int *y0, int *w, int *h)
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{
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int has_luma = 1;
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add_tu_area(tu, x0, y0, w, h);
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if (cu->isp_split_type == ISP_VER_SPLIT && tu->width < MIN_ISP_PRED_WIDTH) {
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*w = MIN_ISP_PRED_WIDTH;
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has_luma = !(idx % (MIN_ISP_PRED_WIDTH / tu->width));
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}
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return has_luma;
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}
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static int get_chroma_predict_unit(const CodingUnit *cu, const TransformUnit *tu, const int idx, int *x0, int *y0, int *w, int *h)
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{
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if (cu->isp_split_type == ISP_NO_SPLIT) {
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add_tu_area(tu, x0, y0, w, h);
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return 1;
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}
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if (idx == cu->num_intra_subpartitions - 1) {
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*x0 = cu->x0;
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*y0 = cu->y0;
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*w = cu->cb_width;
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*h = cu->cb_height;
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return 1;
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}
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return 0;
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}
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//8.4.5.1 General decoding process for intra blocks
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static void predict_intra(VVCLocalContext *lc, const TransformUnit *tu, const int idx, const int target_ch_type)
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{
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const VVCFrameContext *fc = lc->fc;
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const CodingUnit *cu = lc->cu;
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const VVCTreeType tree_type = cu->tree_type;
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int x0, y0, w, h;
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if (cu->pred_mode != MODE_INTRA) {
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add_reconstructed_area(lc, target_ch_type, tu->x0, tu->y0, tu->width, tu->height);
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return;
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}
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if (!target_ch_type && tree_type != DUAL_TREE_CHROMA) {
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if (get_luma_predict_unit(cu, tu, idx, &x0, &y0, &w, &h)) {
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ff_vvc_set_neighbour_available(lc, x0, y0, w, h);
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fc->vvcdsp.intra.intra_pred(lc, x0, y0, w, h, 0);
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add_reconstructed_area(lc, 0, x0, y0, w, h);
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}
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}
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if (target_ch_type && tree_type != DUAL_TREE_LUMA) {
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if (get_chroma_predict_unit(cu, tu, idx, &x0, &y0, &w, &h)){
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||||
ff_vvc_set_neighbour_available(lc, x0, y0, w, h);
|
||||
if (is_cclm(cu->intra_pred_mode_c)) {
|
||||
fc->vvcdsp.intra.intra_cclm_pred(lc, x0, y0, w, h);
|
||||
} else {
|
||||
fc->vvcdsp.intra.intra_pred(lc, x0, y0, w, h, 1);
|
||||
fc->vvcdsp.intra.intra_pred(lc, x0, y0, w, h, 2);
|
||||
}
|
||||
add_reconstructed_area(lc, 1, x0, y0, w, h);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void scale_clip(int *coeff, const int nzw, const int w, const int h,
|
||||
const int shift, const int log2_transform_range)
|
||||
{
|
||||
const int add = 1 << (shift - 1);
|
||||
for (int y = 0; y < h; y++) {
|
||||
int *p = coeff + y * w;
|
||||
for (int x = 0; x < nzw; x++) {
|
||||
*p = av_clip_intp2((*p + add) >> shift, log2_transform_range);
|
||||
p++;
|
||||
}
|
||||
memset(p, 0, sizeof(*p) * (w - nzw));
|
||||
}
|
||||
}
|
||||
|
||||
static void scale(int *out, const int *in, const int w, const int h, const int shift)
|
||||
{
|
||||
const int add = 1 << (shift - 1);
|
||||
for (int y = 0; y < h; y++) {
|
||||
for (int x = 0; x < w; x++) {
|
||||
int *o = out + y * w + x;
|
||||
const int *i = in + y * w + x;
|
||||
*o = (*i + add) >> shift;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// part of 8.7.3 Scaling process for transform coefficients
|
||||
static void derive_qp(const VVCLocalContext *lc, const TransformUnit *tu, TransformBlock *tb)
|
||||
{
|
||||
const VVCSPS *sps = lc->fc->ps.sps;
|
||||
const H266RawSliceHeader *rsh = lc->sc->sh.r;
|
||||
const CodingUnit *cu = lc->cu;
|
||||
int qp, qp_act_offset;
|
||||
|
||||
if (tb->c_idx == 0) {
|
||||
//fix me
|
||||
qp = cu->qp[LUMA] + sps->qp_bd_offset;
|
||||
qp_act_offset = cu->act_enabled_flag ? -5 : 0;
|
||||
} else {
|
||||
const int is_jcbcr = tu->joint_cbcr_residual_flag && tu->coded_flag[CB] && tu->coded_flag[CR];
|
||||
const int idx = is_jcbcr ? JCBCR : tb->c_idx;
|
||||
qp = cu->qp[idx];
|
||||
qp_act_offset = cu->act_enabled_flag ? 1 : 0;
|
||||
}
|
||||
if (tb->ts) {
|
||||
const int qp_prime_ts_min = 4 + 6 * sps->r->sps_min_qp_prime_ts;
|
||||
|
||||
tb->qp = av_clip(qp + qp_act_offset, qp_prime_ts_min, 63 + sps->qp_bd_offset);
|
||||
tb->rect_non_ts_flag = 0;
|
||||
tb->bd_shift = 10;
|
||||
} else {
|
||||
const int log_sum = tb->log2_tb_width + tb->log2_tb_height;
|
||||
const int rect_non_ts_flag = log_sum & 1;
|
||||
|
||||
tb->qp = av_clip(qp + qp_act_offset, 0, 63 + sps->qp_bd_offset);
|
||||
tb->rect_non_ts_flag = rect_non_ts_flag;
|
||||
tb->bd_shift = sps->bit_depth + rect_non_ts_flag + (log_sum / 2)
|
||||
+ 10 - sps->log2_transform_range + rsh->sh_dep_quant_used_flag;
|
||||
}
|
||||
tb->bd_offset = (1 << tb->bd_shift) >> 1;
|
||||
}
|
||||
|
||||
//8.7.3 Scaling process for transform coefficients
|
||||
static av_always_inline int derive_scale(const TransformBlock *tb, const int sh_dep_quant_used_flag)
|
||||
{
|
||||
static const uint8_t rem6[63 + 2 * 6 + 1] = {
|
||||
0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2,
|
||||
3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
|
||||
0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
|
||||
4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3
|
||||
};
|
||||
|
||||
static const uint8_t div6[63 + 2 * 6 + 1] = {
|
||||
0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3,
|
||||
3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
|
||||
7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10,
|
||||
10, 10, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12
|
||||
};
|
||||
|
||||
const static int level_scale[2][6] = {
|
||||
{ 40, 45, 51, 57, 64, 72 },
|
||||
{ 57, 64, 72, 80, 90, 102 }
|
||||
};
|
||||
const int addin = sh_dep_quant_used_flag && !tb->ts;
|
||||
const int qp = tb->qp + addin;
|
||||
|
||||
return level_scale[tb->rect_non_ts_flag][rem6[qp]] << div6[qp];
|
||||
}
|
||||
|
||||
//8.7.3 Scaling process for transform coefficients
|
||||
static const uint8_t* derive_scale_m(const VVCLocalContext *lc, const TransformBlock *tb, uint8_t *scale_m)
|
||||
{
|
||||
//Table 38 – Specification of the scaling matrix identifier variable id according to predMode, cIdx, nTbW, and nTbH
|
||||
const int ids[2][3][6] = {
|
||||
{
|
||||
{ 0, 2, 8, 14, 20, 26 },
|
||||
{ 0, 3, 9, 15, 21, 21 },
|
||||
{ 0, 4, 10, 16, 22, 22 }
|
||||
},
|
||||
{
|
||||
{ 0, 5, 11, 17, 23, 27 },
|
||||
{ 0, 6, 12, 18, 24, 24 },
|
||||
{ 1, 7, 13, 19, 25, 25 },
|
||||
}
|
||||
};
|
||||
const VVCFrameParamSets *ps = &lc->fc->ps;
|
||||
const VVCSPS *sps = ps->sps;
|
||||
const H266RawSliceHeader *rsh = lc->sc->sh.r;
|
||||
const CodingUnit *cu = lc->cu;
|
||||
const VVCScalingList *sl = ps->sl;
|
||||
const int id = ids[cu->pred_mode != MODE_INTRA][tb->c_idx][FFMAX(tb->log2_tb_height, tb->log2_tb_width) - 1];
|
||||
const int log2_matrix_size = (id < 2) ? 1 : (id < 8) ? 2 : 3;
|
||||
uint8_t *p = scale_m;
|
||||
|
||||
av_assert0(!sps->r->sps_scaling_matrix_for_alternative_colour_space_disabled_flag);
|
||||
|
||||
if (!rsh->sh_explicit_scaling_list_used_flag || tb->ts ||
|
||||
sps->r->sps_scaling_matrix_for_lfnst_disabled_flag && cu->apply_lfnst_flag[tb->c_idx])
|
||||
return ff_vvc_default_scale_m;
|
||||
|
||||
if (!sl) {
|
||||
av_log(lc->fc->log_ctx, AV_LOG_WARNING, "bug: no scaling list aps, id = %d", ps->ph.r->ph_scaling_list_aps_id);
|
||||
return ff_vvc_default_scale_m;
|
||||
}
|
||||
|
||||
for (int y = tb->min_scan_y; y <= tb->max_scan_y; y++) {
|
||||
const int off = y << log2_matrix_size >> tb->log2_tb_height << log2_matrix_size;
|
||||
const uint8_t *m = &sl->scaling_matrix_rec[id][off];
|
||||
|
||||
for (int x = tb->min_scan_x; x <= tb->max_scan_x; x++)
|
||||
*p++ = m[x << log2_matrix_size >> tb->log2_tb_width];
|
||||
}
|
||||
if (id >= SL_START_16x16 && !tb->min_scan_x && !tb->min_scan_y)
|
||||
*scale_m = sl->scaling_matrix_dc_rec[id - SL_START_16x16];
|
||||
|
||||
return scale_m;
|
||||
}
|
||||
|
||||
//8.7.3 Scaling process for transform coefficients
|
||||
static av_always_inline int scale_coeff(const TransformBlock *tb, int coeff,
|
||||
const int scale, const int scale_m, const int log2_transform_range)
|
||||
{
|
||||
coeff = (coeff * scale * scale_m + tb->bd_offset) >> tb->bd_shift;
|
||||
coeff = av_clip_intp2(coeff, log2_transform_range);
|
||||
return coeff;
|
||||
}
|
||||
|
||||
static void dequant(const VVCLocalContext *lc, const TransformUnit *tu, TransformBlock *tb)
|
||||
{
|
||||
uint8_t tmp[MAX_TB_SIZE * MAX_TB_SIZE];
|
||||
const H266RawSliceHeader *rsh = lc->sc->sh.r;
|
||||
const VVCSPS *sps = lc->fc->ps.sps;
|
||||
const uint8_t *scale_m = derive_scale_m(lc, tb, tmp);
|
||||
int scale;
|
||||
|
||||
derive_qp(lc, tu, tb);
|
||||
scale = derive_scale(tb, rsh->sh_dep_quant_used_flag);
|
||||
|
||||
for (int y = tb->min_scan_y; y <= tb->max_scan_y; y++) {
|
||||
for (int x = tb->min_scan_x; x <= tb->max_scan_x; x++) {
|
||||
int *coeff = tb->coeffs + y * tb->tb_width + x;
|
||||
|
||||
if (*coeff)
|
||||
*coeff = scale_coeff(tb, *coeff, scale, *scale_m, sps->log2_transform_range);
|
||||
scale_m++;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
//transmatrix[0][0]
|
||||
#define DCT_A 64
|
||||
static void itx_2d(const VVCFrameContext *fc, TransformBlock *tb, const enum TxType trh, const enum TxType trv)
|
||||
{
|
||||
const VVCSPS *sps = fc->ps.sps;
|
||||
const int w = tb->tb_width;
|
||||
const int h = tb->tb_height;
|
||||
const size_t nzw = tb->max_scan_x + 1;
|
||||
const size_t nzh = tb->max_scan_y + 1;
|
||||
const int shift[] = { 7, 5 + sps->log2_transform_range - sps->bit_depth };
|
||||
|
||||
if (w == h && nzw == 1 && nzh == 1 && trh == DCT2 && trv == DCT2) {
|
||||
const int add[] = { 1 << (shift[0] - 1), 1 << (shift[1] - 1) };
|
||||
const int t = (tb->coeffs[0] * DCT_A + add[0]) >> shift[0];
|
||||
const int dc = (t * DCT_A + add[1]) >> shift[1];
|
||||
|
||||
for (int i = 0; i < w * h; i++)
|
||||
tb->coeffs[i] = dc;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
for (int x = 0; x < nzw; x++)
|
||||
fc->vvcdsp.itx.itx[trv][tb->log2_tb_height - 1](tb->coeffs + x, w, nzh);
|
||||
scale_clip(tb->coeffs, nzw, w, h, shift[0], sps->log2_transform_range);
|
||||
|
||||
for (int y = 0; y < h; y++)
|
||||
fc->vvcdsp.itx.itx[trh][tb->log2_tb_width - 1](tb->coeffs + y * w, 1, nzw);
|
||||
scale(tb->coeffs, tb->coeffs, w, h, shift[1]);
|
||||
}
|
||||
|
||||
static void itx_1d(const VVCFrameContext *fc, TransformBlock *tb, const enum TxType trh, const enum TxType trv)
|
||||
{
|
||||
const VVCSPS *sps = fc->ps.sps;
|
||||
const int w = tb->tb_width;
|
||||
const int h = tb->tb_height;
|
||||
const size_t nzw = tb->max_scan_x + 1;
|
||||
const size_t nzh = tb->max_scan_y + 1;
|
||||
|
||||
if ((w > 1 && nzw == 1 && trh == DCT2) || (h > 1 && nzh == 1 && trv == DCT2)) {
|
||||
const int shift = 6 + sps->log2_transform_range - sps->bit_depth;
|
||||
const int add = 1 << (shift - 1);
|
||||
const int dc = (tb->coeffs[0] * DCT_A + add) >> shift;
|
||||
|
||||
for (int i = 0; i < w * h; i++)
|
||||
tb->coeffs[i] = dc;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
if (w > 1)
|
||||
fc->vvcdsp.itx.itx[trh][tb->log2_tb_width - 1](tb->coeffs, 1, nzw);
|
||||
else
|
||||
fc->vvcdsp.itx.itx[trv][tb->log2_tb_height - 1](tb->coeffs, 1, nzh);
|
||||
scale(tb->coeffs, tb->coeffs, w, h, 6 + sps->log2_transform_range - sps->bit_depth);
|
||||
}
|
||||
|
||||
static void transform_bdpcm(TransformBlock *tb, const VVCLocalContext *lc, const CodingUnit *cu)
|
||||
{
|
||||
const VVCSPS *sps = lc->fc->ps.sps;
|
||||
const IntraPredMode mode = tb->c_idx ? cu->intra_pred_mode_c : cu->intra_pred_mode_y;
|
||||
const int vertical = mode == INTRA_VERT;
|
||||
lc->fc->vvcdsp.itx.transform_bdpcm(tb->coeffs, tb->tb_width, tb->tb_height,
|
||||
vertical, sps->log2_transform_range);
|
||||
if (vertical)
|
||||
tb->max_scan_y = tb->tb_height - 1;
|
||||
else
|
||||
tb->max_scan_x = tb->tb_width - 1;
|
||||
}
|
||||
|
||||
static void itransform(VVCLocalContext *lc, TransformUnit *tu, const int tu_idx, const int target_ch_type)
|
||||
{
|
||||
const VVCFrameContext *fc = lc->fc;
|
||||
const VVCSPS *sps = fc->ps.sps;
|
||||
const VVCSH *sh = &lc->sc->sh;
|
||||
const CodingUnit *cu = lc->cu;
|
||||
const int ps = fc->ps.sps->pixel_shift;
|
||||
DECLARE_ALIGNED(32, int, temp)[MAX_TB_SIZE * MAX_TB_SIZE];
|
||||
|
||||
for (int i = 0; i < tu->nb_tbs; i++) {
|
||||
TransformBlock *tb = &tu->tbs[i];
|
||||
const int c_idx = tb->c_idx;
|
||||
const int ch_type = c_idx > 0;
|
||||
|
||||
if (ch_type == target_ch_type && tb->has_coeffs) {
|
||||
const int w = tb->tb_width;
|
||||
const int h = tb->tb_height;
|
||||
const int chroma_scale = ch_type && sh->r->sh_lmcs_used_flag && fc->ps.ph.r->ph_chroma_residual_scale_flag && (w * h > 4);
|
||||
const ptrdiff_t stride = fc->frame->linesize[c_idx];
|
||||
const int hs = sps->hshift[c_idx];
|
||||
const int vs = sps->vshift[c_idx];
|
||||
uint8_t *dst = &fc->frame->data[c_idx][(tb->y0 >> vs) * stride + ((tb->x0 >> hs) << ps)];
|
||||
|
||||
if (cu->bdpcm_flag[tb->c_idx])
|
||||
transform_bdpcm(tb, lc, cu);
|
||||
dequant(lc, tu, tb);
|
||||
if (!tb->ts) {
|
||||
enum TxType trh, trv;
|
||||
|
||||
if (cu->apply_lfnst_flag[c_idx])
|
||||
ilfnst_transform(lc, tb);
|
||||
derive_transform_type(fc, lc, tb, &trh, &trv);
|
||||
if (w > 1 && h > 1)
|
||||
itx_2d(fc, tb, trh, trv);
|
||||
else
|
||||
itx_1d(fc, tb, trh, trv);
|
||||
}
|
||||
|
||||
if (chroma_scale)
|
||||
fc->vvcdsp.intra.lmcs_scale_chroma(lc, temp, tb->coeffs, w, h, cu->x0, cu->y0);
|
||||
fc->vvcdsp.itx.add_residual(dst, chroma_scale ? temp : tb->coeffs, w, h, stride);
|
||||
|
||||
if (tu->joint_cbcr_residual_flag && tb->c_idx)
|
||||
add_residual_for_joint_coding_chroma(lc, tu, tb, chroma_scale);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int reconstruct(VVCLocalContext *lc)
|
||||
{
|
||||
VVCFrameContext *fc = lc->fc;
|
||||
CodingUnit *cu = lc->cu;
|
||||
const int start = cu->tree_type == DUAL_TREE_CHROMA;
|
||||
const int end = fc->ps.sps->r->sps_chroma_format_idc && (cu->tree_type != DUAL_TREE_LUMA);
|
||||
|
||||
for (int ch_type = start; ch_type <= end; ch_type++) {
|
||||
TransformUnit *tu = cu->tus.head;
|
||||
for (int i = 0; tu; i++) {
|
||||
predict_intra(lc, tu, i, ch_type);
|
||||
itransform(lc, tu, i, ch_type);
|
||||
tu = tu->next;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ff_vvc_reconstruct(VVCLocalContext *lc, const int rs, const int rx, const int ry)
|
||||
{
|
||||
const VVCFrameContext *fc = lc->fc;
|
||||
const VVCSPS *sps = fc->ps.sps;
|
||||
const int x_ctb = rx << sps->ctb_log2_size_y;
|
||||
const int y_ctb = ry << sps->ctb_log2_size_y;
|
||||
CTU *ctu = fc->tab.ctus + rs;
|
||||
CodingUnit *cu = ctu->cus;
|
||||
int ret = 0;
|
||||
|
||||
lc->num_ras[0] = lc->num_ras[1] = 0;
|
||||
lc->lmcs.x_vpdu = -1;
|
||||
lc->lmcs.y_vpdu = -1;
|
||||
ff_vvc_decode_neighbour(lc, x_ctb, y_ctb, rx, ry, rs);
|
||||
while (cu) {
|
||||
lc->cu = cu;
|
||||
|
||||
if (cu->ciip_flag)
|
||||
ff_vvc_predict_ciip(lc);
|
||||
if (cu->coded_flag) {
|
||||
ret = reconstruct(lc);
|
||||
} else {
|
||||
add_reconstructed_area(lc, LUMA, cu->x0, cu->y0, cu->cb_width, cu->cb_height);
|
||||
add_reconstructed_area(lc, CHROMA, cu->x0, cu->y0, cu->cb_width, cu->cb_height);
|
||||
}
|
||||
cu = cu->next;
|
||||
}
|
||||
ff_vvc_ctu_free_cus(ctu);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ff_vvc_get_mip_size_id(const int w, const int h)
|
||||
{
|
||||
if (w == 4 && h == 4)
|
||||
return 0;
|
||||
if ((w == 4 || h == 4) || (w == 8 && h == 8))
|
||||
return 1;
|
||||
return 2;
|
||||
}
|
||||
|
||||
int ff_vvc_nscale_derive(const int w, const int h, const int mode)
|
||||
{
|
||||
int side_size, nscale;
|
||||
av_assert0(mode < INTRA_LT_CCLM && !(mode > INTRA_HORZ && mode < INTRA_VERT));
|
||||
if (mode == INTRA_PLANAR || mode == INTRA_DC ||
|
||||
mode == INTRA_HORZ || mode == INTRA_VERT) {
|
||||
nscale = (av_log2(w) + av_log2(h) - 2) >> 2;
|
||||
} else {
|
||||
const int intra_pred_angle = ff_vvc_intra_pred_angle_derive(mode);
|
||||
const int inv_angle = ff_vvc_intra_inv_angle_derive(intra_pred_angle);
|
||||
if (mode >= INTRA_VERT)
|
||||
side_size = h;
|
||||
if (mode <= INTRA_HORZ)
|
||||
side_size = w;
|
||||
nscale = FFMIN(2, av_log2(side_size) - av_log2(3 * inv_angle - 2) + 8);
|
||||
}
|
||||
return nscale;
|
||||
}
|
||||
|
||||
int ff_vvc_need_pdpc(const int w, const int h, const uint8_t bdpcm_flag, const int mode, const int ref_idx)
|
||||
{
|
||||
av_assert0(mode < INTRA_LT_CCLM);
|
||||
if ((w >= 4 && h >= 4) && !ref_idx && !bdpcm_flag) {
|
||||
int nscale;
|
||||
if (mode == INTRA_PLANAR || mode == INTRA_DC ||
|
||||
mode == INTRA_HORZ || mode == INTRA_VERT)
|
||||
return 1;
|
||||
if (mode > INTRA_HORZ && mode < INTRA_VERT)
|
||||
return 0;
|
||||
nscale = ff_vvc_nscale_derive(w, h, mode);
|
||||
return nscale >= 0;
|
||||
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const ReconstructedArea* get_reconstructed_area(const VVCLocalContext *lc, const int x, const int y, const int c_idx)
|
||||
{
|
||||
const int ch_type = c_idx > 0;
|
||||
for (int i = lc->num_ras[ch_type] - 1; i >= 0; i--) {
|
||||
const ReconstructedArea* a = &lc->ras[ch_type][i];
|
||||
const int r = (a->x + a->w);
|
||||
const int b = (a->y + a->h);
|
||||
if (a->x <= x && x < r && a->y <= y && y < b)
|
||||
return a;
|
||||
|
||||
//it's too far away, no need check it;
|
||||
if (x >= r && y >= b)
|
||||
break;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
int ff_vvc_get_top_available(const VVCLocalContext *lc, const int x, const int y, int target_size, const int c_idx)
|
||||
{
|
||||
const VVCFrameContext *fc = lc->fc;
|
||||
const VVCSPS *sps = fc->ps.sps;
|
||||
const int hs = sps->hshift[c_idx];
|
||||
const int vs = sps->vshift[c_idx];
|
||||
const int log2_ctb_size_v = sps->ctb_log2_size_y - vs;
|
||||
const int end_of_ctb_x = ((lc->cu->x0 >> sps->ctb_log2_size_y) + 1) << sps->ctb_log2_size_y;
|
||||
const int y0b = av_mod_uintp2(y, log2_ctb_size_v);
|
||||
const int max_x = FFMIN(fc->ps.pps->width, end_of_ctb_x) >> hs;
|
||||
const ReconstructedArea *a;
|
||||
int px = x;
|
||||
|
||||
if (!y0b) {
|
||||
if (!lc->ctb_up_flag)
|
||||
return 0;
|
||||
target_size = FFMIN(target_size, (lc->end_of_tiles_x >> hs) - x);
|
||||
if (sps->r->sps_entropy_coding_sync_enabled_flag)
|
||||
target_size = FFMIN(target_size, (end_of_ctb_x >> hs) - x);
|
||||
return target_size;
|
||||
}
|
||||
|
||||
target_size = FFMAX(0, FFMIN(target_size, max_x - x));
|
||||
while (target_size > 0 && (a = get_reconstructed_area(lc, px, y - 1, c_idx))) {
|
||||
const int sz = FFMIN(target_size, a->x + a->w - px);
|
||||
px += sz;
|
||||
target_size -= sz;
|
||||
}
|
||||
return px - x;
|
||||
}
|
||||
|
||||
int ff_vvc_get_left_available(const VVCLocalContext *lc, const int x, const int y, int target_size, const int c_idx)
|
||||
{
|
||||
const VVCFrameContext *fc = lc->fc;
|
||||
const VVCSPS *sps = fc->ps.sps;
|
||||
const int hs = sps->hshift[c_idx];
|
||||
const int vs = sps->vshift[c_idx];
|
||||
const int log2_ctb_size_h = sps->ctb_log2_size_y - hs;
|
||||
const int x0b = av_mod_uintp2(x, log2_ctb_size_h);
|
||||
const int end_of_ctb_y = ((lc->cu->y0 >> sps->ctb_log2_size_y) + 1) << sps->ctb_log2_size_y;
|
||||
const int max_y = FFMIN(fc->ps.pps->height, end_of_ctb_y) >> vs;
|
||||
const ReconstructedArea *a;
|
||||
int py = y;
|
||||
|
||||
if (!x0b && !lc->ctb_left_flag)
|
||||
return 0;
|
||||
|
||||
target_size = FFMAX(0, FFMIN(target_size, max_y - y));
|
||||
if (!x0b)
|
||||
return target_size;
|
||||
|
||||
while (target_size > 0 && (a = get_reconstructed_area(lc, x - 1, py, c_idx))) {
|
||||
const int sz = FFMIN(target_size, a->y + a->h - py);
|
||||
py += sz;
|
||||
target_size -= sz;
|
||||
}
|
||||
return py - y;
|
||||
}
|
||||
|
||||
static int less(const void *a, const void *b)
|
||||
{
|
||||
return *(const int*)a - *(const int*)b;
|
||||
}
|
||||
|
||||
int ff_vvc_ref_filter_flag_derive(const int mode)
|
||||
{
|
||||
static const int modes[] = { -14, -12, -10, -6, INTRA_PLANAR, 2, 34, 66, 72, 76, 78, 80};
|
||||
return bsearch(&mode, modes, FF_ARRAY_ELEMS(modes), sizeof(int), less) != NULL;
|
||||
}
|
||||
|
||||
int ff_vvc_intra_pred_angle_derive(const int pred_mode)
|
||||
{
|
||||
static const int angles[] = {
|
||||
0, 1, 2, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 23, 26, 29,
|
||||
32, 35, 39, 45, 51, 57, 64, 73, 86, 102, 128, 171, 256, 341, 512
|
||||
};
|
||||
int sign = 1, idx, intra_pred_angle;
|
||||
if (pred_mode > INTRA_DIAG) {
|
||||
idx = pred_mode - INTRA_VERT;
|
||||
} else if (pred_mode > 0) {
|
||||
idx = INTRA_HORZ - pred_mode;
|
||||
} else {
|
||||
idx = INTRA_HORZ - 2 - pred_mode;
|
||||
}
|
||||
if (idx < 0) {
|
||||
idx = -idx;
|
||||
sign = -1;
|
||||
}
|
||||
intra_pred_angle = sign * angles[idx];
|
||||
return intra_pred_angle;
|
||||
}
|
||||
|
||||
#define ROUND(f) (int)(f < 0 ? -(-f + 0.5) : (f + 0.5))
|
||||
int ff_vvc_intra_inv_angle_derive(const int intra_pred_angle)
|
||||
{
|
||||
float inv_angle;
|
||||
av_assert0(intra_pred_angle);
|
||||
inv_angle = 32 * 512.0 / intra_pred_angle;
|
||||
return ROUND(inv_angle);
|
||||
}
|
||||
|
||||
//8.4.5.2.7 Wide angle intra prediction mode mapping proces
|
||||
int ff_vvc_wide_angle_mode_mapping(const CodingUnit *cu,
|
||||
const int tb_width, const int tb_height, const int c_idx, int pred_mode_intra)
|
||||
{
|
||||
int nw, nh, wh_ratio, min, max;
|
||||
|
||||
if (cu->isp_split_type == ISP_NO_SPLIT || c_idx) {
|
||||
nw = tb_width;
|
||||
nh = tb_height;
|
||||
} else {
|
||||
nw = cu->cb_width;
|
||||
nh = cu->cb_height;
|
||||
}
|
||||
wh_ratio = FFABS(ff_log2(nw) - ff_log2(nh));
|
||||
max = (wh_ratio > 1) ? (8 + 2 * wh_ratio) : 8;
|
||||
min = (wh_ratio > 1) ? (60 - 2 * wh_ratio) : 60;
|
||||
|
||||
if (nw > nh && pred_mode_intra >=2 && pred_mode_intra < max)
|
||||
pred_mode_intra += 65;
|
||||
else if (nh > nw && pred_mode_intra <= 66 && pred_mode_intra > min)
|
||||
pred_mode_intra -= 67;
|
||||
return pred_mode_intra;
|
||||
}
|
||||
49
libavcodec/vvc/vvc_intra.h
Normal file
49
libavcodec/vvc/vvc_intra.h
Normal file
@ -0,0 +1,49 @@
|
||||
/*
|
||||
* VVC intra prediction
|
||||
*
|
||||
* 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
|
||||
*/
|
||||
#ifndef AVCODEC_VVC_VVC_INTRA_H
|
||||
#define AVCODEC_VVC_VVC_INTRA_H
|
||||
|
||||
#include "vvc_ctu.h"
|
||||
|
||||
/**
|
||||
* reconstruct a CTU
|
||||
* @param lc local context for CTU
|
||||
* @param rs raster order for the CTU.
|
||||
* @param rx raster order x for the CTU.
|
||||
* @param ry raster order y for the CTU.
|
||||
* @return AVERROR
|
||||
*/
|
||||
int ff_vvc_reconstruct(VVCLocalContext *lc, const int rs, const int rx, const int ry);
|
||||
|
||||
//utils for vvc_intra_template
|
||||
int ff_vvc_get_top_available(const VVCLocalContext *lc, int x0, int y0, int target_size, int c_idx);
|
||||
int ff_vvc_get_left_available(const VVCLocalContext *lc, int x0, int y0, int target_size, int c_idx);
|
||||
int ff_vvc_get_mip_size_id(int w, int h);
|
||||
int ff_vvc_need_pdpc(int w, int h, uint8_t bdpcm_flag, int mode, int ref_idx);
|
||||
int ff_vvc_nscale_derive(int w, int h, int mode);
|
||||
int ff_vvc_ref_filter_flag_derive(int mode);
|
||||
int ff_vvc_intra_pred_angle_derive(int pred_mode);
|
||||
int ff_vvc_intra_inv_angle_derive(int pred_mode);
|
||||
int ff_vvc_wide_angle_mode_mapping(const CodingUnit *cu,
|
||||
int tb_width, int tb_height, int c_idx, int pred_mode_intra);
|
||||
|
||||
#endif // AVCODEC_VVC_VVC_INTRA_H
|
||||
1015
libavcodec/vvc/vvc_intra_template.c
Normal file
1015
libavcodec/vvc/vvc_intra_template.c
Normal file
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue
Block a user