This function is missing at least on MSVC.
---
configure | 1 +
libavutil/libm.h | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/configure b/configure
index 30f90eb..764d6a0 100755
--- a/configure
+++ b/configure
@@ -1391,6 +1391,7 @@ MATH_FUNCS="
exp2
exp2f
expf
+ isfinite
isinf
isnan
ldexpf
diff --git a/libavutil/libm.h b/libavutil/libm.h
index d6c2cf8..fb4056e 100644
--- a/libavutil/libm.h
+++ b/libavutil/libm.h
@@ -91,6 +91,13 @@ static av_always_inline av_const int isnan(float x)
}
#endif /* HAVE_ISNAN */
+#if !HAVE_ISFINITE
+static av_always_inline av_const int isfinite(float x)
+{
+ return !(isnan(x) || isinf(x));
+}
+#endif /* HAVE_ISFINITE */
+
#if !HAVE_LDEXPF
#undef ldexpf
#define ldexpf(x, exp) ((float)ldexp(x, exp))
--
1.7.10.4
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