1 files changed, 54 insertions, 0 deletions
diff --git a/src/include/common.h b/src/include/common.h
new file mode 100644
index 0000000..0f30aa1
--- /dev/null
+++ b/src/include/common.h
@@ -0,0 +1,54 @@
+/*
+  Common definitions.
+  Copyright 2011 David Robillard
+  Copyright 2002 Mike Rawes
+
+  This is free software: you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This software 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this software.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef blip_common_h
+#define blip_common_h
+
+#include "math_func.h"
+
+/* Handy constants and macros */
+
+#ifndef SMALLEST_FLOAT
+/** Smallest generated non-zero float, used for pre-empting denormals */
+#define SMALLEST_FLOAT (1.0 / (float)0xFFFFFFFF)
+#endif
+
+/*
+ * Clip without branch (from http://musicdsp.org)
+ */
+
+static inline float
+f_min (float x, float a)
+{
+	return a - (a - x + FABSF (a - x)) * 0.5f;
+}
+
+static inline float
+f_max (float x, float b)
+{
+	return (x - b + FABSF (x - b)) * 0.5f + b;
+}
+
+static inline float
+f_clip (float x, float a, float b)
+{
+	return 0.5f * (FABSF (x - a) + a + b - FABSF (x - b));
+}
+
+#endif /* blip_common_h */