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Diffstat (limited to 'parameter/LogarithmicParameterAdaptation.cpp')
-rw-r--r-- | parameter/LogarithmicParameterAdaptation.cpp | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/parameter/LogarithmicParameterAdaptation.cpp b/parameter/LogarithmicParameterAdaptation.cpp new file mode 100644 index 0000000..688527d --- /dev/null +++ b/parameter/LogarithmicParameterAdaptation.cpp @@ -0,0 +1,89 @@ +/* + * 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)); +} |