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imc: Catch a division by zero
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org
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@ -449,6 +449,10 @@ static int bit_allocation(IMCContext *q, IMCChannel *chctx,
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iacc += chctx->bandWidthT[i];
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iacc += chctx->bandWidthT[i];
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summa += chctx->bandWidthT[i] * chctx->flcoeffs4[i];
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summa += chctx->bandWidthT[i] * chctx->flcoeffs4[i];
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}
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}
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if (!iacc)
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return AVERROR_INVALIDDATA;
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chctx->bandWidthT[BANDS - 1] = 0;
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chctx->bandWidthT[BANDS - 1] = 0;
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summa = (summa * 0.5 - freebits) / iacc;
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summa = (summa * 0.5 - freebits) / iacc;
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