Per H.266 (V3) section 7.4.3.19, LmcsMaxBinIdx is set equal to
15 - lmcs_delta_max_bin_idx. The previous code instead had it equal to
15 - lmcs_min_bin_idx. This could cause decoder mismatches.
Signed-off-by: Frank Plowman <p...@frankplowman.com>
---
libavcodec/vvc/ps.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/vvc/ps.c b/libavcodec/vvc/ps.c
index 9bd2d01776..ff9bc46169 100644
--- a/libavcodec/vvc/ps.c
+++ b/libavcodec/vvc/ps.c
@@ -736,7 +736,7 @@ static int lmcs_derive_lut(VVCLMCS *lmcs, const H266RawAPS
*rlmcs, const H266Raw
return AVERROR_INVALIDDATA;
lmcs->min_bin_idx = rlmcs->lmcs_min_bin_idx;
- lmcs->max_bin_idx = LMCS_MAX_BIN_SIZE - 1 - rlmcs->lmcs_min_bin_idx;
+ lmcs->max_bin_idx = LMCS_MAX_BIN_SIZE - 1 - rlmcs->lmcs_delta_max_bin_idx;
memset(cw, 0, sizeof(cw));
for (int i = lmcs->min_bin_idx; i <= lmcs->max_bin_idx; i++)
--
2.47.0
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