avcodec/vvcdec: ff_vvc_decode_neighbour, support subpicture

libavcodec/vvc/vvc_ctu.c

@@ -2493,6 +2493,10 @@ void ff_vvc_decode_neighbour(VVCLocalContext *lc, const int x_ctb, const int y_c
         lc->boundary_flags |= BOUNDARY_UPPER_TILE;
     if (ry > 0 && fc->tab.slice_idx[rs] != fc->tab.slice_idx[rs - fc->ps.pps->ctb_width])
         lc->boundary_flags |= BOUNDARY_UPPER_SLICE;
+    if (fc->ps.sps->r->sps_subpic_ctu_top_left_x[lc->sc->sh.r->curr_subpic_idx] == rx)
+        lc->boundary_flags |= BOUNDARY_LEFT_SUBPIC;
+    if (fc->ps.sps->r->sps_subpic_ctu_top_left_y[lc->sc->sh.r->curr_subpic_idx] == ry)
+        lc->boundary_flags |= BOUNDARY_UPPER_SUBPIC;
     lc->ctb_left_flag = rx > 0 && !(lc->boundary_flags & BOUNDARY_LEFT_TILE);
     lc->ctb_up_flag   = ry > 0 && !(lc->boundary_flags & BOUNDARY_UPPER_TILE) && !(lc->boundary_flags & BOUNDARY_UPPER_SLICE);
     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]) &&

libavcodec/vvc/vvc_ctu.h

@@ -421,8 +421,10 @@ typedef struct VVCLocalContext {
 
 #define BOUNDARY_LEFT_SLICE     (1 << 0)
 #define BOUNDARY_LEFT_TILE      (1 << 1)
-#define BOUNDARY_UPPER_SLICE    (1 << 2)
-#define BOUNDARY_UPPER_TILE     (1 << 3)
+#define BOUNDARY_LEFT_SUBPIC    (1 << 2)
+#define BOUNDARY_UPPER_SLICE    (1 << 3)
+#define BOUNDARY_UPPER_TILE     (1 << 4)
+#define BOUNDARY_UPPER_SUBPIC   (1 << 5)
     /* properties of the boundary of the current CTB for the purposes
      * of the deblocking filter */
     int boundary_flags;