[FFmpeg-cvslog] lavc/vvc: Stricter bound on pps_exp_slice_height_in_ctus_minus1

[Frank Plowman]

ffmpeg | branch: master | Frank Plowman <post at frankplowman.com> | Sun Mar  2 12:12:38 2025 +0000| [20a6eb1ca3439581adf6367bfcc4d72eb2987cd9] | committer: Nuo Mi

lavc/vvc: Stricter bound on pps_exp_slice_height_in_ctus_minus1

When pps_num_exp_slices_in_tile[i] is nonzero, the ith tile is made up
of pps_num_exp_slices_in_tile[i] slices stacked atop one another, where
the height of the jth slice in the ith tile is given by
pps_exp_slice_height_in_ctus_minus1[i][j].  The sum of the heights of
the slices in the tile should not exceed the height of the tile itself.

Signed-off-by: Frank Plowman <post at frankplowman.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=20a6eb1ca3439581adf6367bfcc4d72eb2987cd9
---

 libavcodec/cbs_h266_syntax_template.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/cbs_h266_syntax_template.c b/libavcodec/cbs_h266_syntax_template.c
index 58211026bb..2e440e70f9 100644
--- a/libavcodec/cbs_h266_syntax_template.c
+++ b/libavcodec/cbs_h266_syntax_template.c
@@ -2020,7 +2020,7 @@ static int FUNC(pps) (CodedBitstreamContext *ctx, RWContext *rw,
                         for (j = 0; j < current->pps_num_exp_slices_in_tile[i];
                              j++) {
                             ues(pps_exp_slice_height_in_ctus_minus1[i][j], 0,
-                                current->row_height_val[tile_y] - 1, 2,
+                                remaining_height_in_ctbs_y - 1, 2,
                                 i, j);
                             slice_height_in_ctus =
                                 current->