On 2/25/2024 2:51 PM, Frank Plowman wrote:
The spec says "the value of sps_num_subpics_minus1 shall be in the
range of 0 to MaxSlicesPerAu − 1, inclusive."
Signed-off-by: Frank Plowman <p...@frankplowman.com>
---
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 26ee7a420b..1d4d0c796f 100644
--- a/libavcodec/cbs_h266_syntax_template.c
+++ b/libavcodec/cbs_h266_syntax_template.c
@@ -1130,7 +1130,7 @@ static int FUNC(sps)(CodedBitstreamContext *ctx,
RWContext *rw,
flag(sps_subpic_info_present_flag);
if (current->sps_subpic_info_present_flag) {
- ue(sps_num_subpics_minus1, 1, VVC_MAX_SLICES - 1);
+ ue(sps_num_subpics_minus1, 0, VVC_MAX_SLICES - 1);
Strictly speaking, MaxSlicesPerAu varies depending on the stream's
general_level_idc value, listed in table A.2 from Annex-A (in ITU-T
H.266 V3).
Right now, VVC_MAX_SLICES is defined as 600 in vvc.h, but the max value
in the spec is 1000, from level 6.3. I assume it was added in V3?
if (current->sps_num_subpics_minus1 > 0) {
flag(sps_independent_subpics_flag);
flag(sps_subpic_same_size_flag);
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