1 files changed, 70 insertions, 0 deletions
diff --git a/flow/synth_frequency_impl.cc b/flow/synth_frequency_impl.cc
new file mode 100644
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--- /dev/null
+++ b/flow/synth_frequency_impl.cc
@@ -0,0 +1,70 @@
+    /*
+
+    Copyright (C) 2000 Stefan Westerfeld
+                       stefan@space.twc.de
+
+    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 "artsflow.h"
+#include "stdsynthmodule.h"
+#include <math.h>
+#include <stdio.h>
+
+using namespace Arts;
+
+namespace Arts {
+
+class Synth_FREQUENCY_impl :public Synth_FREQUENCY_skel, public StdSynthModule
+{
+	float fpos;
+public:
+	void streamInit() {
+		fpos = 0;
+	}
+	void calculateBlock(unsigned long cycles) {
+		float fsample = samplingRateFloat;
+		float finc = *frequency/fsample;
+
+		while(cycles)
+		{
+			if(cycles >= 8 && ((finc*8+fpos) < 0.9))
+			{
+				fpos += finc; *pos++ = fpos;
+				fpos += finc; *pos++ = fpos;
+				fpos += finc; *pos++ = fpos;
+				fpos += finc; *pos++ = fpos;
+				fpos += finc; *pos++ = fpos;
+				fpos += finc; *pos++ = fpos;
+				fpos += finc; *pos++ = fpos;
+				fpos += finc; *pos++ = fpos;
+				cycles -= 8;
+			}
+			else
+			{
+				fpos += finc;
+				fpos -= floor(fpos);
+				*pos++ = fpos;
+				cycles--;
+			}
+		}
+	}
+};
+
+REGISTER_IMPLEMENTATION(Synth_FREQUENCY_impl);
+
+}