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wma: check byte_offset_bits

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Fixes assertion failure

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-01-30 22:56:45 +01:00
parent 033f1644b5
commit 984add64a4
1 changed files with 4 additions and 0 deletions
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libavcodec/wma.c
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@ -134,6 +134,10 @@ int ff_wma_init(AVCodecContext *avctx, int flags2)
bps = (float)avctx->bit_rate / (float)(avctx->channels * avctx->sample_rate);
s->byte_offset_bits = av_log2((int)(bps * s->frame_len / 8.0 + 0.5)) + 2;
if (s->byte_offset_bits + 3 > MIN_CACHE_BITS) {
av_log(avctx, AV_LOG_ERROR, "byte_offset_bits %d is too large\n", s->byte_offset_bits);
return AVERROR_PATCHWELCOME;
}
/* compute high frequency value and choose if noise coding should
be activated */