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commit eab3192647ad489dd60947fb783c647235424f27 Author: James Almer <[email protected]> AuthorDate: Tue Mar 3 18:36:17 2026 -0300 Commit: Michael Niedermayer <[email protected]> CommitDate: Tue May 5 15:21:10 2026 +0200 avcodec/av1dec: sync frame header and tile group behavior with CBS A new Sequence Header or a Temporal Delimiter OBU invalidate any previous frame if not yet complete (As is the case of missing Tile Groups). Similarly, a new Frame Header invalidates any onging Tile Group parsing. Fixes: out of array access Fixes: av1dec_tile_desync.mp4 Fixes: av1dec_tile_desync_bypass.mp4 Signed-off-by: James Almer <[email protected]> (cherry picked from commit a1496ced654e7dca9a426d263d35f9c39b7b4b88) Signed-off-by: Michael Niedermayer <[email protected]> --- libavcodec/av1dec.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/libavcodec/av1dec.c b/libavcodec/av1dec.c index 600b022626..4a3ad376a8 100644 --- a/libavcodec/av1dec.c +++ b/libavcodec/av1dec.c @@ -1042,6 +1042,8 @@ static int av1_decode_frame(AVCodecContext *avctx, AVFrame *frame, } s->raw_seq = &obu->obu.sequence_header; + s->raw_frame_header = NULL; + raw_tile_group = NULL; ret = set_context_with_sequence(avctx, s->raw_seq); if (ret < 0) { @@ -1091,6 +1093,8 @@ static int av1_decode_frame(AVCodecContext *avctx, AVFrame *frame, goto end; } + raw_tile_group = NULL; + if (unit->type == AV1_OBU_FRAME) s->raw_frame_header = &obu->obu.frame.header; else @@ -1170,8 +1174,11 @@ static int av1_decode_frame(AVCodecContext *avctx, AVFrame *frame, } } break; - case AV1_OBU_TILE_LIST: case AV1_OBU_TEMPORAL_DELIMITER: + s->raw_frame_header = NULL; + raw_tile_group = NULL; + // fall-through + case AV1_OBU_TILE_LIST: case AV1_OBU_PADDING: case AV1_OBU_METADATA: break; _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
