This is needed in order to obtain what is available for hardcoded
table generation.
A minimal avutil/host_libm.h is also created.
Signed-off-by: Ganesh Ajjanagadde <gajjanaga...@gmail.com>
---
configure | 41 +++++++++++++++++++++++++++++++++++++++++
libavutil/host_libm.h | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 92 insertions(+)
create mode 100644 libavutil/host_libm.h
diff --git a/configure b/configure
index 0198b75..af411a3 100755
--- a/configure
+++ b/configure
@@ -926,6 +926,10 @@ ld_o(){
eval printf '%s\\n' $LD_O
}
+host_ld_o(){
+ eval printf '%s\\n' $HOSTLD_O
+}
+
check_ld(){
log check_ld "$@"
type=$1
@@ -938,6 +942,18 @@ check_ld(){
check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
}
+check_host_ld(){
+ log check_host_ld "$@"
+ type=$1
+ shift 1
+ flags=$(filter_out '-l*|*.so' $@)
+ libs=$(filter '-l*|*.so' $@)
+ check_$type $($host_cflags_filter $flags) || return
+ flags=$($host_ldflags_filter $flags)
+ libs=$($host_ldflags_filter $libs)
+ check_cmd $host_ld $host_ldflags $flags $(host_ld_o $TMPE) $TMPO
$host_libs $extralibs
+}
+
print_include(){
hdr=$1
test "${hdr%.h}" = "${hdr}" &&
@@ -1061,6 +1077,20 @@ int main(void){ return (int) foo; }
EOF
}
+check_host_mathfunc(){
+ log check_host_mathfunc "$@"
+ func=$1
+ narg=$2
+ shift 2
+ test $narg = 2 && args="f, g" || args="f"
+ disable $(add_suffix _host $func)
+ check_host_ld "host_cc" "$@" <<EOF && enable $(add_suffix _host $func)
+#include <math.h>
+float foo(float f, float g) { return $func($args); }
+int main(void){ return (int) foo; }
+EOF
+}
+
check_func_headers(){
log check_func_headers "$@"
headers=$1
@@ -1762,6 +1792,12 @@ INTRINSICS_LIST="
intrinsics_neon
"
+HOST_MATH_FUNCS="
+ cbrt
+ llrint
+ rint
+"
+
MATH_FUNCS="
atanf
atan2f
@@ -1902,6 +1938,7 @@ HAVE_LIST="
$HAVE_LIST_PUB
$HEADERS_LIST
$INTRINSICS_LIST
+ $(add_suffix _host $HOST_MATH_FUNCS)
$MATH_FUNCS
$SYSTEM_FUNCS
$THREADS_LIST
@@ -5317,6 +5354,10 @@ for func in $MATH_FUNCS; do
eval check_mathfunc $func \${${func}_args:-1}
done
+for func in $HOST_MATH_FUNCS; do
+ eval check_host_mathfunc $func \${${func}_args:-1}
+done
+
# these are off by default, so fail if requested and not available
enabled avfoundation_indev && { check_header_oc AVFoundation/AVFoundation.h ||
disable avfoundation_indev; }
enabled avfoundation_indev && { check_lib2 CoreGraphics/CoreGraphics.h
CGGetActiveDisplayList -framework CoreGraphics ||
diff --git a/libavutil/host_libm.h b/libavutil/host_libm.h
new file mode 100644
index 0000000..927b93e
--- /dev/null
+++ b/libavutil/host_libm.h
@@ -0,0 +1,51 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Replacements for frequently missing host libm functions
+ */
+
+#ifndef AVUTIL_HOST_LIBM_H
+#define AVUTIL_HOST_LIBM_H
+
+#include <math.h>
+#include "config.h"
+#include "attributes.h"
+#include "intfloat.h"
+
+#if !HAVE_CBRT_HOST
+static av_always_inline double cbrt(double x)
+{
+ return x < 0 ? -pow(-x, 1.0 / 3.0) : pow(x, 1.0 / 3.0);
+}
+#endif
+
+#if !HAVE_LLRINT_HOST
+#undef llrint
+#define llrint(x) ((long long)rint(x))
+#endif /* HAVE_LLRINT_HOST */
+
+#if !HAVE_RINT_HOST
+static inline double rint(double x)
+{
+ return x >= 0 ? floor(x + 0.5) : ceil(x - 0.5);
+}
+#endif /* HAVE_RINT_HOST */
+
+#endif /* AVUTIL_LIBM_H */
--
2.6.2
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