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Convert NaN to 0/0 in av_d2q

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This fixes aspect ratio calculation for encoding from files with 0/0 stored,
common with ogg/theora

Originally committed as revision 23280 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2010-05-24 00:44:02 +00:00
parent f1a0518524
commit 31fdd64194
1 changed files with 2 additions and 0 deletions
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libavutil/rational.c
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@ -98,6 +98,8 @@ AVRational av_d2q(double d, int max){
#define LOG2 0.69314718055994530941723212145817656807550013436025
int exponent= FFMAX( (int)(log(fabs(d) + 1e-20)/LOG2), 0);
int64_t den= 1LL << (61 - exponent);
if (isnan(d))
return (AVRational){0,0};
av_reduce(&a.num, &a.den, (int64_t)(d * den + 0.5), den, max);
return a;