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dcadec: check lfe field
Fix out of array accesses Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -737,6 +737,12 @@ static int dca_parse_frame_header(DCAContext *s)
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s->lfe = get_bits(&s->gb, 2);
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s->predictor_history = get_bits(&s->gb, 1);
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if (s->lfe == 3) {
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s->lfe = 0;
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av_log_ask_for_sample(s->avctx, "LFE is 3\n");
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return AVERROR_PATCHWELCOME;
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}
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/* TODO: check CRC */
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if (s->crc_present)
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s->header_crc = get_bits(&s->gb, 16);
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