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av_d2q: Add a special case for |value| > MAX and |value| < 1/MAX

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-05-25 15:39:02 +02:00
parent f77467a11d
commit 887d74c47e
2 changed files with 3 additions and 1 deletions
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2
libavutil/rational.c
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@ -115,6 +115,8 @@ AVRational av_d2q(double d, int max)
exponent = FFMAX( (int)(log(fabs(d) + 1e-20)/LOG2), 0);
den = 1LL << (61 - exponent);
av_reduce(&a.num, &a.den, rint(d * den), den, max);
if ((!a.num || !a.den) && d && max>0 && max<INT_MAX)
av_reduce(&a.num, &a.den, llrint(d * den), den, INT_MAX);
return a;
}

2
tests/ref/fate/parseutils
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@ -21,7 +21,7 @@ Testing av_parse_video_rate()
'.23' -> 23/100 OK
'-.23' -> -23/100 ERROR
'-0.234' -> -117/500 ERROR
'-0.0000001' -> 0/1 ERROR
'-0.0000001' -> -1/10000000 ERROR
' 21332.2324 ' -> 917286/43 OK
' -21332.2324 ' -> -917286/43 ERROR