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av_d2q: Fix infinity check

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The old check would fail on huge but not infinite values
and the later code could then fail to handle them correctly in
some cases.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-05-25 15:22:19 +02:00
parent 8caf2da320
commit de7d290631
1 changed files with 1 additions and 1 deletions
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2
libavutil/rational.c
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@ -110,7 +110,7 @@ AVRational av_d2q(double d, int max)
int64_t den;
if (isnan(d))
return (AVRational) { 0,0 };
if (isinf(d))
if (fabs(d) > INT_MAX + 3LL)
return (AVRational) { d < 0 ? -1 : 1, 0 };
exponent = FFMAX( (int)(log(fabs(d) + 1e-20)/LOG2), 0);
den = 1LL << (61 - exponent);