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Diffstat (limited to 'gst-libs/gst/floatcast/floatcast.h')
| -rw-r--r-- | gst-libs/gst/floatcast/floatcast.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/gst-libs/gst/floatcast/floatcast.h b/gst-libs/gst/floatcast/floatcast.h new file mode 100644 index 00000000..3a232b76 --- /dev/null +++ b/gst-libs/gst/floatcast/floatcast.h @@ -0,0 +1,54 @@ +/* GStreamer + * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> + * Library <2002> Steve Baker <stevebaker_org@yahoo.co.uk> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifndef __FLOATCAST_H__ +#define __FLOATCAST_H__ + +#include <config.h> + +#if (HAVE_LRINT && HAVE_LRINTF) + + /* These defines enable functionality introduced with the 1999 ISO C + ** standard. They must be defined before the inclusion of math.h to + ** engage them. If optimisation is enabled, these functions will be + ** inlined. With optimisation switched off, you have to link in the + ** maths library using -lm. + */ + + #define _ISOC9X_SOURCE 1 + #define _ISOC99_SOURCE 1 + + #define __USE_ISOC9X 1 + #define __USE_ISOC99 1 + + #include <math.h> + + #define gst_cast_float(x) ((gint)lrintf(x)) + #define gst_cast_double(x) ((gint)lrint(x)) + +#else + /* use a standard c cast, but do rounding correctly */ + #define gst_cast_float(x) ((x)>=0?(gint)((x)+0.5):(gint)((x)-0.5)) + #define gst_cast_double(x) ((x)>=0?(gint)((x)+0.5):(gint)((x)-0.5)) + +#endif + +#endif /* __FLOATCAST_H__ */ + |