| /* |
| * 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 "Utility.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 += CUtility::toString(_dLogarithmBase); |
| strResult += "\n"; |
| strResult += " - FloorValue: "; |
| strResult += CUtility::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)); |
| } |