Martin Storsjö <[email protected]> writes: > --- > configure | 4 ++++ > libavutil/libm.h | 21 +++++++++++++++++++++ > 2 files changed, 25 insertions(+) > > diff --git a/configure b/configure > index d3795e4..0f85f9a 100755 > --- a/configure > +++ b/configure > @@ -1095,6 +1095,8 @@ HAVE_LIST=" > inline_asm > io_h > isatty > + isinf > + isnan > jack_port_get_latency_range > ldbrx > libdc1394_1 > @@ -2926,6 +2928,8 @@ enabled vaapi && require vaapi va/va.h vaInitialize -lva > check_mathfunc cbrtf > check_mathfunc exp2 > check_mathfunc exp2f > +check_mathfunc isnan > +check_mathfunc isinf > check_mathfunc llrint > check_mathfunc llrintf > check_mathfunc log2 > diff --git a/libavutil/libm.h b/libavutil/libm.h > index b6d8a94..49d26f0 100644 > --- a/libavutil/libm.h > +++ b/libavutil/libm.h > @@ -27,6 +27,7 @@ > #include <math.h> > #include "config.h" > #include "attributes.h" > +#include "intfloat.h" > > #if !HAVE_CBRTF > static av_always_inline float cbrtf(float x) > @@ -45,6 +46,26 @@ static av_always_inline float cbrtf(float x) > #define exp2f(x) ((float)exp2(x)) > #endif /* HAVE_EXP2F */ > > +#if !HAVE_ISNAN > +static av_always_inline av_const int isnan(double x) > +{ > + uint64_t v = av_double2int(x); > + if ((v & UINT64_C(0x7ff0000000000000)) != UINT64_C(0x7ff0000000000000)) > + return 0; > + return (v & UINT64_C(0x000fffffffffffff)) != 0; > +} > +#endif /* HAVE_ISNAN */ > + > +#if !HAVE_ISINF > +static av_always_inline av_const int isinf(double x) > +{ > + uint64_t v = av_double2int(x); > + if ((v & UINT64_C(0x7ff0000000000000)) != UINT64_C(0x7ff0000000000000)) > + return 0; > + return !(v & UINT64_C(0x000fffffffffffff)); > +} > +#endif /* HAVE_ISINF */
There is no need to use doubles here. A double-precision inf or nan converted to float will still be an inf/nan. -- Måns Rullgård [email protected] _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
