From: "Ronald S. Bultje" <[email protected]>
Add fallback implementations if they don't exist.
---
configure | 4 ++++
libavutil/libm.h | 10 ++++++++++
2 files changed, 14 insertions(+)
diff --git a/configure b/configure
index 06bf2c0..a19b5f9 100755
--- a/configure
+++ b/configure
@@ -1094,6 +1094,8 @@ HAVE_LIST="
inet_aton
inline_asm
isatty
+ isinf
+ isnan
jack_port_get_latency_range
ldbrx
libdc1394_1
@@ -2922,6 +2924,8 @@ 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 b4d5af0..6d51271 100644
--- a/libavutil/libm.h
+++ b/libavutil/libm.h
@@ -42,6 +42,16 @@
#define exp2f(x) ((float)exp2(x))
#endif /* HAVE_EXP2F */
+#if !HAVE_ISNAN
+#undef isnan
+#define isnan(x) ((x) != (x))
+#endif /* HAVE_ISNAN */
+
+#if !HAVE_ISINF
+#undef isinf
+#define isinf(x) ((x) * 2 == (x) && (x) != 0)
+#endif /* HAVE_ISINF */
+
#if !HAVE_LLRINT
#undef llrint
#define llrint(x) ((long long)rint(x))
--
1.7.9.4
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