vvcdec: add LMCS, Deblocking, SAO, and ALF filters

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>

libavcodec/vvc/Makefile

@@ -4,6 +4,7 @@ clean::
 OBJS-$(CONFIG_VVC_DECODER)          +=  vvc/vvc_cabac.o         \
                                         vvc/vvc_ctu.o           \
                                         vvc/vvc_data.o          \
+                                        vvc/vvc_filter.o        \
                                         vvc/vvc_inter.o         \
                                         vvc/vvc_intra.o         \
                                         vvc/vvc_itx_1d.o        \

libavcodec/vvc/vvc_ctu.h

@@ -463,6 +463,7 @@ typedef struct ALFParams {
 void ff_vvc_set_neighbour_available(VVCLocalContext *lc, int x0, int y0, int w, int h);
 void ff_vvc_decode_neighbour(VVCLocalContext *lc, int x_ctb, int y_ctb, int rx, int ry, int rs);
 void ff_vvc_ctu_free_cus(CTU *ctu);
+int ff_vvc_get_qPy(const VVCFrameContext *fc, int xc, int yc);
 void ff_vvc_ep_init_stat_coeff(EntryPoint *ep, int bit_depth, int persistent_rice_adaptation_enabled_flag);
 
 #endif // AVCODEC_VVC_VVC_CTU_H

libavcodec/vvc/vvc_filter.h

@@ -0,0 +1,71 @@
+/*
+ * VVC filters
+ *
+ * Copyright (C) 2022 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_FILTER_H
+#define AVCODEC_VVC_VVC_FILTER_H
+
+#include "vvcdec.h"
+
+/**
+ * lmcs filter for the CTU
+ * @param lc local context for CTU
+ * @param x0 x position for the CTU
+ * @param y0 y position for the CTU
+ */
+void ff_vvc_lmcs_filter(const VVCLocalContext *lc, const int x0, const int y0);
+
+/**
+ * vertical deblock filter for the CTU
+ * @param lc local context for CTU
+ * @param x0 x position for the CTU
+ * @param y0 y position for the CTU
+ */
+void ff_vvc_deblock_vertical(const VVCLocalContext *lc, int x0, int y0);
+
+/**
+ * horizontal deblock filter for the CTU
+ * @param lc local context for CTU
+ * @param x0 x position for the CTU
+ * @param y0 y position for the CTU
+ */
+void ff_vvc_deblock_horizontal(const VVCLocalContext *lc, int x0, int y0);
+
+/**
+ * sao filter for the CTU
+ * @param lc local context for CTU
+ * @param x0 x position for the CTU
+ * @param y0 y position for the CTU
+ */
+void ff_vvc_sao_filter(VVCLocalContext *lc, const int x0, const int y0);
+
+void ff_vvc_sao_copy_ctb_to_hv(VVCLocalContext* lc, int rx, int ry, int last_row);
+void ff_vvc_alf_copy_ctu_to_hv(VVCLocalContext* lc, int x0, int y0);
+
+/**
+ * alf filter for the CTU
+ * @param lc local context for CTU
+ * @param x0 x position for the CTU
+ * @param y0 y position for the CTU
+ */
+void ff_vvc_alf_filter(VVCLocalContext *lc, const int x0, const int y0);
+
+#endif // AVCODEC_VVC_VVC_CTU_H