AVRational av_d2q(double d, int max)
{
AVRational a;
-#define LOG2 0.69314718055994530941723212145817656807550013436025
int exponent;
int64_t den;
if (isnan(d))
return (AVRational) { 0,0 };
if (fabs(d) > INT_MAX + 3LL)
return (AVRational) { d < 0 ? -1 : 1, 0 };
- exponent = FFMAX( (int)(log(fabs(d) + 1e-20)/LOG2), 0);
+ frexp(d, &exponent);
+ exponent = FFMAX(exponent-1, 0);
den = 1LL << (61 - exponent);
// (int64_t)rint() and llrint() do not work with gcc on ia64 and sparc64
av_reduce(&a.num, &a.den, floor(d * den + 0.5), den, max);