1 files changed, 54 insertions, 0 deletions
diff --git a/arts/modules/synth/synth_atan_saturate_impl.cpp b/arts/modules/synth/synth_atan_saturate_impl.cpp
new file mode 100644
index 00000000..7eb0b513
--- /dev/null
+++ b/arts/modules/synth/synth_atan_saturate_impl.cpp
@@ -0,0 +1,54 @@
+    /*
+
+    Copyright (C) 2000 Jeff Tranter
+                       tranter@pobox.com
+
+    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; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+
+    */
+
+#include <stdio.h>
+#include <math.h>
+#include "artsmodulessynth.h"
+#include "stdsynthmodule.h"
+
+using namespace Arts;
+
+// This can be used to get the input signal to the normalized range
+// between -1 and 1 that Synth_PLAY can process. The louder the input
+// signal, the more the signal is distorted by this module. For very
+// small input signals, the output signal is about the input signal
+// (no change).
+
+class Synth_ATAN_SATURATE_impl : virtual public Synth_ATAN_SATURATE_skel,
+							virtual public StdSynthModule
+{
+protected:
+	float _inscale;
+
+public:
+	float inscale() { return _inscale; }
+
+  void inscale(float newInscale) { _inscale = newInscale; }
+
+	void calculateBlock(unsigned long samples)
+	{
+		for (unsigned long i=0; i<samples; i++)
+			outvalue[i] = atan(invalue[i]*_inscale)/(M_PI/2.0);
+	}
+};
+
+REGISTER_IMPLEMENTATION(Synth_ATAN_SATURATE_impl);