xref: /external/parameter-framework/upstream/parameter/LinearParameterAdaptation.cpp

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 * may be used to endorse or promote products derived from this software without
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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#include "LinearParameterAdaptation.h"

#define base CParameterAdaptation

using std::string;

CLinearParameterAdaptation::CLinearParameterAdaptation() : base("Linear")
{
}

CLinearParameterAdaptation::CLinearParameterAdaptation(const string &strType) : base(strType)
{
}

// Element properties
void CLinearParameterAdaptation::showProperties(string &strResult) const
{
    base::showProperties(strResult);

    // SlopeNumerator
    strResult += " - SlopeNumerator: ";
    strResult += std::to_string(_dSlopeNumerator);
    strResult += "\n";

    // SlopeDenominator
    strResult += " - SlopeDenominator: ";
    strResult += std::to_string(_dSlopeDenominator);
    strResult += "\n";
}

// From IXmlSink
bool CLinearParameterAdaptation::fromXml(const CXmlElement &xmlElement,
                                         CXmlSerializingContext &serializingContext)
{
    // Get SlopeNumerator
    xmlElement.getAttribute("SlopeNumerator", _dSlopeNumerator);

    // Get SlopeDenominator
    if (xmlElement.getAttribute("SlopeDenominator", _dSlopeDenominator) &&
        (_dSlopeDenominator == 0)) {

        // Avoid by 0 division errors
        serializingContext.setError("SlopeDenominator attribute can't be 0 on element" +
                                    xmlElement.getPath());
        return false;
    }

    // Base
    return base::fromXml(xmlElement, serializingContext);
}

// Conversions
int64_t CLinearParameterAdaptation::fromUserValue(double dValue) const
{
    return base::fromUserValue(dValue * _dSlopeNumerator / _dSlopeDenominator);
}

double CLinearParameterAdaptation::toUserValue(int64_t iValue) const
{
    return base::toUserValue(iValue) * _dSlopeDenominator / _dSlopeNumerator;
}