Added gst-plugins-base-subtitles0.10-0.10.34 for Meego Harmattan 1.2

[mafwsubrenderer] / gst-plugins-base-subtitles0.10 / gst-libs / gst / floatcast / floatcast.h

diff --git a/gst-plugins-base-subtitles0.10/gst-libs/gst/floatcast/floatcast.h b/gst-plugins-base-subtitles0.10/gst-libs/gst/floatcast/floatcast.h
new file mode 100644 (file)
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+/* 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.
+ */
+
+/**
+ * SECTION:gstfloatcast
+ * @short_description: Floating point platform independence macros
+ *
+ * The floatcast.h header file contains a couple of convenience macros for
+ * floating point numbers.
+ *
+ * If you include this header, your application or library must link against
+ * libm (for maths.h support).
+ *
+ * For optimal results, your application&apos;s or library&apos;s build
+ * system should check whether the C99 functions lrint and lrintf are supported
+ * and define the preprocessor symbols HAVE_LRINT and HAVE_LRINTF if so.  If
+ * you are using autoconf, you can do this by using the AC_C99_FUNC_LRINT and
+ * AC_C99_FUNC_LRINTF checks in your configure.ac or configure.in file and
+ * including your application's config.h header before you include floatcast.h.
+ */
+
+#ifndef __FLOATCAST_H__
+#define __FLOATCAST_H__
+
+#include <string.h>
+#include <glib.h>
+
+#if defined (_MSC_VER) && !defined (inline)
+#define inline __inline
+#endif
+
+G_BEGIN_DECLS
+
+/* FIXME 0.11: these gst_cast_*() functions are not used anywhere, so we could
+ * just as well get rid of them and move the float/double swap macros into
+ * gstutils.h in core */
+
+/**
+ * gst_cast_float:
+ * @x: input value
+ *
+ * Casts a 32-bit floating point value (float) to an integer without bias.
+ */
+/**
+ * gst_cast_double:
+ * @x: input value
+ *
+ * Casts a 64-bit floating point value (double) to an integer without bias.
+ */
+
+/* FIXME: HAVE_LRINT && HAVE_LRINTF are defined by config.h - they should
+ * not be used in an installed header. */
+#if defined(HAVE_LRINT) && defined(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
+        #include <math.h>
+
+        /* use a standard c cast, but do rounding correctly */
+        #define gst_cast_float(x)       ((gint)floor((x)+0.5))
+        #define gst_cast_double(x)      ((gint)floor((x)+0.5))
+
+#endif
+
+G_END_DECLS
+
+#endif /* __FLOATCAST_H__ */
+