fresh audaspace from trunk

intern/audaspace/FX/AUD_SquareFactory.cpp

@@ -0,0 +1,62 @@
+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#include "AUD_SquareFactory.h"
+#include "AUD_CallbackIIRFilterReader.h"
+
+sample_t squareFilter(AUD_CallbackIIRFilterReader* reader, float* threshold)
+{
+	float in = reader->x(0);
+	if(in >= *threshold)
+		return 1;
+	else if(in <= -*threshold)
+		return -1;
+	else
+		return 0;
+}
+
+void endSquareFilter(float* threshold)
+{
+	delete threshold;
+}
+
+AUD_SquareFactory::AUD_SquareFactory(AUD_IFactory* factory, float threshold) :
+		AUD_EffectFactory(factory),
+		m_threshold(threshold)
+{
+}
+
+float AUD_SquareFactory::getThreshold() const
+{
+	return m_threshold;
+}
+
+AUD_IReader* AUD_SquareFactory::createReader() const
+{
+	return new AUD_CallbackIIRFilterReader(getReader(), 1, 1,
+										   (doFilterIIR) squareFilter,
+										   (endFilterIIR) endSquareFilter,
+										   new float(m_threshold));
+}