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commit 5602b24f43db05b358306fcb56b2b8b54ab8aa4a Author: Phillip Blucas <[email protected]> AuthorDate: Thu Nov 5 20:10:16 2026 -0600 Commit: kierank <[email protected]> CommitDate: Fri Nov 6 19:09:22 2026 +0000 avcodec/hevc: decode tiles serially with constrained intra prediction With constrained_intra_pred_flag set, intra sample substitution checks whether neighbouring PUs are intra coded, for example the up-left one, gated only on the block not being at the picture edge. At a tile edge that PU belongs to another tile, which under tile-parallel slice threading is being decoded by another thread at the same time, so the read is a data race; TSan reports it on PPS_A_qualcomm_7. Keep such pictures on the serial path. Signed-off-by: Phillip Blucas <[email protected]> --- libavcodec/hevc/hevcdec.c | 1 + 1 file changed, 1 insertion(+) diff --git a/libavcodec/hevc/hevcdec.c b/libavcodec/hevc/hevcdec.c index faee53c509..bdcb1b0f85 100644 --- a/libavcodec/hevc/hevcdec.c +++ b/libavcodec/hevc/hevcdec.c @@ -3696,6 +3696,7 @@ static int decode_slice_data(HEVCContext *s, const HEVCLayerContext *l, s->sh.num_entry_point_offsets > 0 && pps->tiles_enabled_flag && !pps->entropy_coding_sync_enabled_flag && + !pps->constrained_intra_pred_flag && s->sh.first_slice_in_pic_flag && s->sh.num_entry_point_offsets + 1 == pps->num_tile_rows * pps->num_tile_columns) return hls_slice_data_tiles(s, nal); -- To stop receiving notification emails like this one, please contact [email protected]. _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
