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avcodec/imc: Check flcoeffs5

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Fixes infinite loop
Fixes Ticket2996

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-09-27 22:53:24 +02:00
parent c2d1943029
commit 3e0c78bac6
1 changed files with 6 additions and 1 deletions
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7
libavcodec/imc.c
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@ -451,8 +451,13 @@ static int bit_allocation(IMCContext *q, IMCChannel *chctx,
for (i = 0; i < BANDS; i++)
highest = FFMAX(highest, chctx->flcoeffs1[i]);
for (i = 0; i < BANDS - 1; i++)
for (i = 0; i < BANDS - 1; i++) {
if (chctx->flcoeffs5[i] <= 0) {
av_log(NULL, AV_LOG_ERROR, "flcoeffs5 %f invalid\n", chctx->flcoeffs5[i]);
return AVERROR_INVALIDDATA;
}
chctx->flcoeffs4[i] = chctx->flcoeffs3[i] - log2f(chctx->flcoeffs5[i]);
}
chctx->flcoeffs4[BANDS - 1] = limit;
highest = highest * 0.25;