1 files changed, 63 insertions, 0 deletions
diff --git a/arts/modules/synth/synth_noise_impl.cpp b/arts/modules/synth/synth_noise_impl.cpp
new file mode 100644
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+++ b/arts/modules/synth/synth_noise_impl.cpp
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+    /*
+
+    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., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+
+    */
+
+#include <stdlib.h>
+
+#include "artsmodulessynth.h"
+#include "stdsynthmodule.h"
+
+using namespace Arts;
+
+namespace Arts {
+
+#define NOISE_SIZE 8192
+
+class Synth_NOISE_impl : virtual public Synth_NOISE_skel,
+							virtual public StdSynthModule
+{
+	static float noise[NOISE_SIZE];
+	static bool noiseInit;
+	unsigned long pos;
+public:
+	Synth_NOISE_impl()
+	{
+		if(!noiseInit)
+		{
+			for(unsigned long i=0;i<NOISE_SIZE;i++)
+				noise[i] = ((float)rand()/(float)RAND_MAX)*2.0-1.0;
+			noiseInit = true;
+		}
+	}
+	void calculateBlock(unsigned long samples)
+	{
+		unsigned long i;
+		pos = rand();
+		for(i=0;i<samples;i++) outvalue[i] = noise[pos++ & (NOISE_SIZE-1)];
+	}
+};
+
+float Synth_NOISE_impl::noise[8192];
+bool Synth_NOISE_impl::noiseInit = false;
+
+REGISTER_IMPLEMENTATION(Synth_NOISE_impl);
+
+}