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vc1dec: use get_bits_long and limit the read bits to 32

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get_bits should not be used with more than 25 bits.

Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit 1f1e0a2971)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2015-06-25 22:47:38 +02:00
parent 98aedbf9fe
commit 983dc64772
1 changed files with 1 additions and 1 deletions
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2
libavcodec/vc1dec.c
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@ -465,7 +465,7 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx)
count = avctx->extradata_size*8 - get_bits_count(&gb);
if (count > 0) {
av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
count, get_bits(&gb, count));
count, get_bits_long(&gb, FFMIN(count, 32)));
} else if (count < 0) {
av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
}