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avcodec/vvcdec: return error if CTU size > 128

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The v3 spec reserves CTU size 256. Currently, we use an uint8_t* table to hold cb_width and cb_height.
If a CTU size of 256 is not split, cb_width and cb_height will overflow to 0.
To avoid switching to uint16_t, rejecting CTU size 256 provides a simple solution.
This commit is contained in:
Nuo Mi 2024-11-23 17:32:38 +08:00
parent eb67e60cb0
commit 4de67e8746
1 changed files with 6 additions and 0 deletions
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6
libavcodec/vvc/ps.c
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@ -649,6 +649,12 @@ static int decode_ps(VVCParamSets *ps, const CodedBitstreamH266Context *h266, vo
if (ret < 0)
return ret;
if (rsps->sps_log2_ctu_size_minus5 > 2) {
// CTU > 128 are reserved in vvc spec v3
av_log(log_ctx, AV_LOG_ERROR, "CTU size > 128. \n");
return AVERROR_PATCHWELCOME;
}
ret = decode_pps(ps, rpps);
if (ret < 0)
return ret;