zero_crossings() [2/2]

MAYAFLUX_API std::vector< size_t > MayaFlux::zero_crossings	(	const std::vector< double > &	data,
		double	threshold = 0.0
	)

Detect zero crossings in single-channel signal.

Parameters

data	Input signal data
threshold	Minimum amplitude difference for crossing detection (default: 0.0)

Returns

Vector of zero crossing indices

Definition at line 333 of file Yantra.cpp.

{
    static const auto s_op = [] {
        auto a = std::make_shared<Yantra::StandardEnergyAnalyzer>();
        a->set_energy_method(Yantra::EnergyMethod::ZERO_CROSSING);
        return a;
    }();
    auto result = s_op->analyze_energy({ Kakshya::DataVariant(data) });
    if (result.channels.empty())
        return {};
 
    const auto& positions = result.channels[0].event_positions;
    if (threshold <= 0.0)
        return positions;
 
    std::vector<size_t> filtered;
    for (size_t pos : positions) {
        if (pos < data.size() && std::abs(data[pos]) >= threshold)
            filtered.push_back(pos);
    }
    return filtered;
}

References a, and MayaFlux::Yantra::ZERO_CROSSING.