For systems with broken libms.
Tested with NAN, -NAN, INFINITY, -INFINITY, +/-x for regular double x and
combinations of these.
Signed-off-by: Ganesh Ajjanagadde <gajjanaga...@gmail.com>
---
configure | 2 +-
libavutil/libm.h | 9 +++++++++
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/configure b/configure
index 123d1df..7917386 100755
--- a/configure
+++ b/configure
@@ -2852,7 +2852,7 @@ cropdetect_filter_deps="gpl"
delogo_filter_deps="gpl"
deshake_filter_select="pixelutils"
drawtext_filter_deps="libfreetype"
-dynaudnorm_filter_deps="copysign erf"
+dynaudnorm_filter_deps="erf"
ebur128_filter_deps="gpl"
eq_filter_deps="gpl"
fftfilt_filter_deps="avcodec"
diff --git a/libavutil/libm.h b/libavutil/libm.h
index 6d8bd68..637de19 100644
--- a/libavutil/libm.h
+++ b/libavutil/libm.h
@@ -62,6 +62,15 @@ static av_always_inline float cbrtf(float x)
}
#endif
+#if !HAVE_COPYSIGN
+static av_always_inline double copysign(double x, double y)
+{
+ uint64_t vx = av_double2int(x);
+ uint64_t vy = av_double2int(y);
+ return av_int2double((vx & 0x7fffffffffffffff) | (vy &
0x8000000000000000));
+}
+#endif
+
#if !HAVE_COSF
#undef cosf
#define cosf(x) ((float)cos(x))
--
2.6.4
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