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86 lines
3.3 KiB
86 lines
3.3 KiB
/*
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* Copyright (c) 2011-2015, Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "LogarithmicParameterAdaptation.h"
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#include <cmath>
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#include <limits>
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#include <algorithm>
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#define base CLinearParameterAdaptation
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CLogarithmicParameterAdaptation::CLogarithmicParameterAdaptation() : base("Logarithmic")
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{
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static_assert(std::numeric_limits<double>::is_iec559,
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"Only double-precision floating points that are compliant with"
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" IEC 559 (aka IEEE 754) are supported");
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}
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// Element properties
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void CLogarithmicParameterAdaptation::showProperties(std::string &strResult) const
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{
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base::showProperties(strResult);
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strResult += " - LogarithmBase: ";
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strResult += std::to_string(_dLogarithmBase);
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strResult += "\n";
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strResult += " - FloorValue: ";
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strResult += std::to_string(_dFloorValue);
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strResult += "\n";
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}
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bool CLogarithmicParameterAdaptation::fromXml(const CXmlElement &xmlElement,
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CXmlSerializingContext &serializingContext)
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{
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if (xmlElement.getAttribute("LogarithmBase", _dLogarithmBase) &&
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(_dLogarithmBase <= 0 || _dLogarithmBase == 1)) {
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// Avoid negative and 1 values
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serializingContext.setError("LogarithmBase attribute cannot be negative or 1 on element" +
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xmlElement.getPath());
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return false;
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}
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xmlElement.getAttribute("FloorValue", _dFloorValue);
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// Base
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return base::fromXml(xmlElement, serializingContext);
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}
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int64_t CLogarithmicParameterAdaptation::fromUserValue(double value) const
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{
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return std::max(base::fromUserValue(log(value) / log(_dLogarithmBase)),
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static_cast<int64_t>(_dFloorValue));
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}
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double CLogarithmicParameterAdaptation::toUserValue(int64_t iValue) const
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{
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return exp(base::toUserValue(iValue) * log(_dLogarithmBase));
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}
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