vvcdec: add motion vector decoder

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

@@ -4,5 +4,6 @@ clean::
 OBJS-$(CONFIG_VVC_DECODER)          +=  vvc/vvc_cabac.o         \
                                         vvc/vvc_ctu.o           \
                                         vvc/vvc_data.o          \
+                                        vvc/vvc_mvs.o           \
                                         vvc/vvc_ps.o            \
                                         vvc/vvc_refs.o          \

libavcodec/vvc/vvc_ctu.c

@@ -20,7 +20,25 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "vvc_cabac.h"
 #include "vvc_ctu.h"
+#include "vvc_mvs.h"
+
+void ff_vvc_set_neighbour_available(VVCLocalContext *lc,
+    const int x0, const int y0, const int w, const int h)
+{
+    const int log2_ctb_size = lc->fc->ps.sps->ctb_log2_size_y;
+    const int x0b = av_mod_uintp2(x0, log2_ctb_size);
+    const int y0b = av_mod_uintp2(y0, log2_ctb_size);
+
+    lc->na.cand_up       = (lc->ctb_up_flag   || y0b);
+    lc->na.cand_left     = (lc->ctb_left_flag || x0b);
+    lc->na.cand_up_left  = (x0b || y0b) ? lc->na.cand_left && lc->na.cand_up : lc->ctb_up_left_flag;
+    lc->na.cand_up_right_sap =
+            (x0b + w == 1 << log2_ctb_size) ? lc->ctb_up_right_flag && !y0b : lc->na.cand_up;
+    lc->na.cand_up_right = lc->na.cand_up_right_sap && (x0 + w) < lc->end_of_tiles_x;
+}
+
 
 void ff_vvc_ep_init_stat_coeff(EntryPoint *ep,
     const int bit_depth, const int persistent_rice_adaptation_enabled_flag)

libavcodec/vvc/vvc_ctu.h

@@ -459,6 +459,8 @@ typedef struct ALFParams {
     uint8_t applied[3];
 } ALFParams;
 
+//utils
+void ff_vvc_set_neighbour_available(VVCLocalContext *lc, int x0, int y0, int w, int h);
 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_mvs.h

@@ -0,0 +1,46 @@
+/*
+ * VVC motion vector decoder
+ *
+ * Copyright (C) 2023 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_MVS_H
+#define AVCODEC_VVC_VVC_MVS_H
+
+#include "vvcdec.h"
+
+void ff_vvc_round_mv(Mv *mv, int lshift, int rshift);
+void ff_vvc_clip_mv(Mv *mv);
+void ff_vvc_mv_scale(Mv *dst, const Mv *src, int td, int tb);
+void ff_vvc_luma_mv_merge_mode(VVCLocalContext *lc, int merge_idx, int ciip_flag, MvField *mv);
+void ff_vvc_luma_mv_merge_gpm(VVCLocalContext *lc, const int merge_gpm_idx[2], MvField *mv);
+void ff_vvc_mvp(VVCLocalContext *lc, const int *mvp_lx_flag, const int amvr_shift,  MotionInfo *mi);
+void ff_vvc_sb_mv_merge_mode(VVCLocalContext *lc, int merge_subblock_idx, PredictionUnit *pu);
+void ff_vvc_affine_mvp(VVCLocalContext *lc, const int *mvp_lx_flag, const int amvr_shift, MotionInfo* mi);
+void ff_vvc_store_sb_mvs(const VVCLocalContext *lc, PredictionUnit *pu);
+void ff_vvc_store_mv(const VVCLocalContext *lc, const MotionInfo *mi);
+void ff_vvc_store_mvf(const VVCLocalContext *lc, const MvField *mvf);
+void ff_vvc_store_gpm_mvf(const VVCLocalContext *lc, const PredictionUnit* pu);
+void ff_vvc_update_hmvp(VVCLocalContext *lc, const MotionInfo *mi);
+int ff_vvc_no_backward_pred_flag(const VVCLocalContext *lc);
+MvField* ff_vvc_get_mvf(const VVCFrameContext *fc, const int x0, const int y0);
+void ff_vvc_set_mvf(const VVCLocalContext *lc, const int x0, const int y0, const int w, const int h, const MvField *mvf);
+void ff_vvc_set_intra_mvf(const VVCLocalContext *lc);
+
+#endif //AVCODEC_VVC_VVC_MVS_H