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lavc/vvc: Fix derivation of LmcsMaxBinIdx

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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 <post@frankplowman.com>
This commit is contained in:
Frank Plowman 2024-11-28 22:17:27 +00:00 committed by Nuo Mi
parent 699322519c
commit 499896ca2f
1 changed files with 1 additions and 1 deletions
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2
libavcodec/vvc/ps.c
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@ -742,7 +742,7 @@ 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++)