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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.
+ */
+
+#include "LogarithmicParameterAdaptation.h"
+#include <math.h>
+
+#define base CLinearParameterAdaptation
+
+// M_E is the base of the natural logarithm for 'e' from math.h
+CLogarithmicParameterAdaptation::CLogarithmicParameterAdaptation() : base("Logarithmic"),
+ _dLogarithmBase(M_E), _dFloorValue(-INFINITY)
+{
+}
+
+// Element properties
+void CLogarithmicParameterAdaptation::showProperties(std::string& strResult) const
+{
+ base::showProperties(strResult);
+
+ strResult += " - LogarithmBase: ";
+ strResult += toString(_dLogarithmBase);
+ strResult += "\n";
+ strResult += " - FloorValue: ";
+ strResult += toString(_dFloorValue);
+ strResult += "\n";
+}
+
+bool CLogarithmicParameterAdaptation::fromXml(const CXmlElement& xmlElement,
+ CXmlSerializingContext& serializingContext)
+{
+
+ if (xmlElement.hasAttribute("LogarithmBase")) {
+
+ _dLogarithmBase = xmlElement.getAttributeDouble("LogarithmBase");
+
+ // Avoid negative and 1 values
+ if (_dLogarithmBase <= 0 || _dLogarithmBase == 1) {
+ serializingContext.setError("LogarithmBase attribute cannot be negative or 1 on element"
+ + xmlElement.getPath());
+
+ return false;
+ }
+ }
+
+ if (xmlElement.hasAttribute("FloorValue")) {
+ _dFloorValue = xmlElement.getAttributeDouble("FloorValue");
+ }
+ // Base
+ return base::fromXml(xmlElement, serializingContext);
+}
+
+
+int64_t CLogarithmicParameterAdaptation::fromUserValue(double dValue) const
+{
+ return fmax(round(base::fromUserValue(log(dValue) / log(_dLogarithmBase))),
+ _dFloorValue);
+}
+
+double CLogarithmicParameterAdaptation::toUserValue(int64_t iValue) const
+{
+ return exp(base::toUserValue(iValue) * log(_dLogarithmBase));
+}