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

[mafwsubrenderer] / gst-plugins-base-subtitles0.10 / gst / audioconvert / gstfastrandom.h

diff --git a/gst-plugins-base-subtitles0.10/gst/audioconvert/gstfastrandom.h b/gst-plugins-base-subtitles0.10/gst/audioconvert/gstfastrandom.h
new file mode 100644 (file)
index 0000000..022b87e
--- /dev/null
+++ b/gst-plugins-base-subtitles0.10/gst/audioconvert/gstfastrandom.h
@@ -0,0 +1,90 @@
+/* GStreamer
+ * Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * gstfastrandom.h: Fast, bad PNRG
+ *
+ * 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.
+ */
+
+#include <glib.h>
+
+#ifndef __GST_FAST_RANDOM__
+#define __GST_FAST_RANDOM__
+
+/* transform [0..2^32] -> [0..1] */
+#define GST_RAND_DOUBLE_TRANSFORM 2.3283064365386962890625e-10
+
+/* This is the base function, implementing a linear congruential generator
+ * and returning a pseudo random number between 0 and 2^32 - 1.
+ */
+static inline guint32
+gst_fast_random_uint32 (void)
+{
+  static guint32 state = 0xdeadbeef;
+
+  return (state = state * 1103515245 + 12345);
+}
+
+static inline guint32
+gst_fast_random_uint32_range (gint32 start, gint32 end)
+{
+  guint64 tmp = gst_fast_random_uint32 ();
+
+  tmp = (tmp * (end - start)) / G_MAXUINT32 + start;
+
+  return (guint32) tmp;
+}
+
+static inline gint32
+gst_fast_random_int32 (void)
+{
+  return (gint32) gst_fast_random_uint32 ();
+}
+
+static inline gint32
+gst_fast_random_int32_range (gint32 start, gint32 end)
+{
+  gint64 tmp = gst_fast_random_uint32 ();
+
+  tmp = (tmp * (end - start)) / G_MAXUINT32 + start;
+
+  return (gint32) tmp;
+}
+
+static inline gdouble
+gst_fast_random_double (void)
+{
+  gdouble ret;
+
+  ret = gst_fast_random_uint32 () * GST_RAND_DOUBLE_TRANSFORM;
+  ret = (ret + gst_fast_random_uint32 ()) * GST_RAND_DOUBLE_TRANSFORM;
+
+  if (ret >= 1.0)
+    return gst_fast_random_double ();
+
+  return ret;
+}
+
+static inline gdouble
+gst_fast_random_double_range (gdouble start, gdouble end)
+{
+  return gst_fast_random_double () * (end - start) + start;
+}
+
+#undef GST_RAND_DOUBLE_TRANSFORM
+
+#endif /* __GST_FAST_RANDOM__ */
+