117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/* GStreamer
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* Copyright (C) 2010 Tim-Philipp Müller <tim centricular net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_MATH_COMPAT_H__
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#define __GST_MATH_COMPAT_H__
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#ifndef __GI_SCANNER__
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/* This header is not included automatically via gst/gst.h, you need to
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* include it explicitly if you need it. */
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#ifndef _USE_MATH_DEFINES
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#define _USE_MATH_DEFINES /* so MSVC defines M_PI etc. */
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#endif
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#include <math.h>
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#include <glib.h>
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G_BEGIN_DECLS
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/* http://en.wikipedia.org/wiki/Math.h */
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#define __GST_MATH_COMPAT_NEED_RINT
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#define __GST_MATH_COMPAT_NEED_RINTF
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#define __GST_MATH_COMPAT_NEED_ISNAN
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#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
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#undef __GST_MATH_COMPAT_NEED_RINT
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#undef __GST_MATH_COMPAT_NEED_RINTF
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#undef __GST_MATH_COMPAT_NEED_ISNAN
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#endif
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#if defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L
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#undef __GST_MATH_COMPAT_NEED_RINT
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#undef __GST_MATH_COMPAT_NEED_RINTF
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#undef __GST_MATH_COMPAT_NEED_ISNAN
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#endif
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#ifndef M_PI
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#define M_PI G_PI
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#endif
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#ifndef M_PI_2
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#define M_PI_2 G_PI_2
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#endif
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#ifndef M_PI_4
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#define M_PI_4 G_PI_4
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#endif
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static inline double
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__gst_math_compat_rint (double x)
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{
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return floor (x + 0.5);
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}
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static inline float
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__gst_math_compat_rintf (float x)
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{
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return floorf (x + 0.5);
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}
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static inline gboolean
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__gst_math_compat_isnan (double x)
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{
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return x != x;
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}
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#if defined (__GST_MATH_COMPAT_NEED_RINT) && !defined (rint)
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#define rint(x) __gst_math_compat_rint(x)
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#endif
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#if defined (__GST_MATH_COMPAT_NEED_RINTF) && !defined (rintf)
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#define rintf(x) __gst_math_compat_rintf(x)
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#endif
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#if defined (__GST_MATH_COMPAT_NEED_ISNAN) && !defined (isnan)
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#define isnan(x) __gst_math_compat_isnan (x)
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#endif
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#ifndef NAN
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#if G_BYTE_ORDER == G_BIG_ENDIAN
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#define __GST_NAN_BYTES { 0x7f, 0xc0, 0, 0 }
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#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
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#define __GST_NAN_BYTES { 0, 0, 0xc0, 0x7f }
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#endif
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static union {
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unsigned char __c[4];
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float __d;
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} __gst_nan_union G_GNUC_UNUSED = {
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__GST_NAN_BYTES
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};
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#define NAN (__gst_nan_union.__d)
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#endif
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G_END_DECLS
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#endif /* !__GI_SCANNER__ */
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#endif /* __GST_MATH_COMPAT_H__ */
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