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on2avc: limit number of bits to 30 in get_egolomb

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More don't fit into the integer output.

Also use get_bits_long, since get_bits only supports reading up to 25
bits, while get_bits_long supports the full integer range.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2015-12-16 16:48:19 +01:00
parent 4386f17bbd
commit 4d5c3b02e9
1 changed files with 9 additions and 2 deletions
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11
libavcodec/on2avc.c
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@ -211,9 +211,16 @@ static inline int get_egolomb(GetBitContext *gb)
{
int v = 4;
while (get_bits1(gb)) v++;
while (get_bits1(gb)) {
v++;
if (v > 30) {
av_log(NULL, AV_LOG_WARNING, "Too large golomb code in get_egolomb.\n");
v = 30;
break;
}
}
return (1 << v) + get_bits(gb, v);
return (1 << v) + get_bits_long(gb, v);
}
static int on2avc_decode_pairs(On2AVCContext *c, GetBitContext *gb, float *dst,