[FFmpeg-cvslog] lavc/vvc: Increase size of ctb_size_y

[Frank Plowman]

ffmpeg | branch: master | Frank Plowman <post at frankplowman.com> | Sat Apr 13 11:55:54 2024 +0100| [993c231de0b1a7574c0951959314bb692646b93e] | committer: Nuo Mi

lavc/vvc: Increase size of ctb_size_y

sps_log2_ctu_size_minus5 is between 0 and 2, with 3 reserved for future
use.  The VVC decoder allows sps_log2_ctu_size_minus5 to be 3, and so
ctb_size_y should be at least 16 bits to prevent overflows.  An
alternative patch would leave sps_log2_ctu_size_minus5 as 8 bits and
disallow sps_log2_ctu_size_minus5 = 3.

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=993c231de0b1a7574c0951959314bb692646b93e
---

 libavcodec/vvc/ps.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/vvc/ps.h b/libavcodec/vvc/ps.h
index 78f1687fef..6656a06320 100644
--- a/libavcodec/vvc/ps.h
+++ b/libavcodec/vvc/ps.h
@@ -69,7 +69,7 @@ typedef struct VVCSPS {
     uint8_t     bit_depth;                                          ///< BitDepth
     uint8_t     qp_bd_offset;                                       ///< QpBdOffset
     uint8_t     ctb_log2_size_y;                                    ///< CtbLog2SizeY
-    uint8_t     ctb_size_y;                                         ///< CtbSizeY
+    uint16_t    ctb_size_y;                                         ///< CtbSizeY
     uint8_t     min_cb_log2_size_y;                                 ///< MinCbLog2SizeY
     uint8_t     min_cb_size_y;                                      ///< MinCbSizeY
     uint8_t     max_tb_size_y;                                      ///< MaxTbSizeY