extract_scalar()

double MayaFlux::Yantra::Granular::AttributeOp::extract_scalar ( const std::any &  analysis_result, AnalysisType  type, const std::string &  qualifier  )

staticprivate

Extract a named scalar from a typed analysis result.

Parameters

analysis_result	std::any holding the concrete analysis struct.
type	Analysis category used to select the correct cast path.
qualifier	Names the specific scalar to extract.

Returns

Extracted double value.

Definition at line 422 of file GranularWorkflow.cpp.

{
    const std::string q = resolve_qualifier(type, qualifier);
 
    if (type == AnalysisType::FEATURE) {
        const auto& ea = safe_any_cast_or_throw<EnergyAnalysis>(analysis_result);
        if (ea.channels.empty())
            return 0.0;
        const auto& ch = ea.channels[0];
 
        if (q == "rms" || q == "mean")
            return ch.mean_energy;
        if (q == "peak" || q == "max")
            return ch.max_energy;
        if (q == "min")
            return ch.min_energy;
        if (q == "variance")
            return ch.variance;
        if (q == "dynamic_range")
            return ch.max_energy - ch.min_energy;
        if (q == "zero_crossing")
            return ch.event_positions.empty() ? 0.0 : static_cast<double>(ch.event_positions.size());
 
        return ch.mean_energy;
    }
 
    if (type == AnalysisType::STATISTICAL) {
        const auto& sa = safe_any_cast_or_throw<StatisticalAnalysis>(analysis_result);
        if (sa.channel_statistics.empty())
            return 0.0;
        const auto& ch = sa.channel_statistics[0];
 
        if (q == "mean")
            return ch.mean_stat;
        if (q == "std_dev")
            return ch.stat_std_dev;
        if (q == "variance")
            return ch.stat_variance;
        if (q == "kurtosis")
            return ch.kurtosis;
        if (q == "skewness")
            return ch.skewness;
        if (q == "median")
            return ch.median;
        if (q == "max")
            return ch.max_stat;
        if (q == "min")
            return ch.min_stat;
 
        return ch.mean_stat;
    }
 
    return 0.0;
}

References MayaFlux::Yantra::FEATURE, q, and MayaFlux::Yantra::STATISTICAL.