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avcodec/mpeg12dec: check block index in mpeg2_fast_decode_block_non_intra()

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Prevents some overreads at the cost of 1 cpu cycle

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
pull/54/head
Michael Niedermayer 11 years ago
parent 0c8e5fb211
commit d82eccea2b
1 changed files with 2 additions and 1 deletions
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  1. 3
      libavcodec/mpeg12dec.c

3
libavcodec/mpeg12dec.c
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@ -489,8 +489,9 @@ static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
} }
block[j] = level; block[j] = level;
if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF || i >= 64)
break; break;
UPDATE_CACHE(re, &s->gb); UPDATE_CACHE(re, &s->gb);
} }
end: end:

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