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cook: check subbands more completely, fix out of array read.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -1197,6 +1197,10 @@ static av_cold int cook_decode_init(AVCodecContext *avctx)
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av_log_ask_for_sample(avctx, "subbands > 50\n");
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return AVERROR_PATCHWELCOME;
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}
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if (q->subpacket[s].subbands == 0) {
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av_log_ask_for_sample(avctx, "subbands is 0\n");
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return AVERROR_PATCHWELCOME;
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}
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q->subpacket[s].gains1.now = q->subpacket[s].gain_1;
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q->subpacket[s].gains1.previous = q->subpacket[s].gain_2;
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q->subpacket[s].gains2.now = q->subpacket[s].gain_3;
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