1 files changed, 52 insertions, 0 deletions
diff --git a/arts/modules/synth/synth_wave_pulse_impl.cc b/arts/modules/synth/synth_wave_pulse_impl.cc
new file mode 100644
index 00000000..52a2c35e
--- /dev/null
+++ b/arts/modules/synth/synth_wave_pulse_impl.cc
@@ -0,0 +1,52 @@
+    /*
+
+    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., 59 Temple Place - Suite 330,
+    Boston, MA 02111-1307, USA.
+
+    */
+
+#include "artsmodulessynth.h"
+#include "stdsynthmodule.h"
+
+using namespace Arts;
+
+// A square wave with a programmable duty cycle. The duty cycle should
+// be in the range 0..1.
+
+class Synth_WAVE_PULSE_impl : virtual public Synth_WAVE_PULSE_skel,
+							virtual public StdSynthModule
+{
+protected:
+	float _dutycycle;
+ 
+public:
+	float dutycycle() { return _dutycycle; }
+
+	void dutycycle(float newDutycycle) { _dutycycle = newDutycycle; }         
+
+	void calculateBlock(unsigned long samples)
+	{
+		unsigned long i;
+		for(i=0;i<samples;i++)
+		{
+			outvalue[i] = (pos[i] < _dutycycle) ? 1.0 : -1.0;
+		}
+	}
+};
+
+REGISTER_IMPLEMENTATION(Synth_WAVE_PULSE_impl);