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+/*
+ * Copyright (c) 2011-2015, Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ * may be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "LinearParameterAdaptation.h"
+
+/**
+ * This class is used to perform a logarithmic adapation of type:
+ * (slopeNumerator / slopeDenominator) * log(parameter) + offset
+ * Since log(x) == -INFINITY , we can define FloorValue as a
+ *       x -> 0
+ * a lower bound limit for the adaptation
+ */
+class CLogarithmicParameterAdaptation : public CLinearParameterAdaptation
+{
+public:
+    CLogarithmicParameterAdaptation();
+
+    /**
+     * Conversions must satisfy the following: f(f'(a)) = a
+     * Let f=fromUserValue and f'=toUserValue
+     * if y = f(log(x)/log(base)), then
+     * f'(y) * log(base) = log (x)
+     * exp(f'(y)*log(base)) = x
+     */
+    virtual int64_t fromUserValue(double dValue) const;
+    virtual double toUserValue(int64_t iValue) const;
+
+    virtual void showProperties(std::string& strResult) const;
+
+    virtual bool fromXml(const CXmlElement& xmlElement, CXmlSerializingContext& serializingContext);
+private:
+    /**
+     * _dLogarithmBase characterizes the new logarithm logB(x) with
+     * the following property: logB(x) = log(x) / log(_dLogarithmBase).
+     * log being the base-e logarithm.
+     */
+    double _dLogarithmBase;
+    /**
+     * _dFloorValue reflects the lower bound for volume attenuation
+     */
+    double _dFloorValue;
+};