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error concealment: check that references are frames and not fields.
frames cant have field references. Fixes a deadlock Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -66,6 +66,10 @@ static void decode_mb(MpegEncContext *s, int ref)
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av_log(s->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
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ref = 0;
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}
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if ((h->ref_list[0][ref].f.reference&3) != 3) {
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av_log(s->avctx, AV_LOG_DEBUG, "Reference invalid\n");
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return;
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}
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fill_rectangle(&s->current_picture.f.ref_index[0][4 * h->mb_xy],
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2, 2, 2, ref, 1);
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fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
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