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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));
}
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