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 266 of file Yantra.cpp.

{
    auto analyzer = std::make_shared<Yantra::StandardEnergyAnalyzer>();
    analyzer->set_energy_method(Yantra::EnergyMethod::ZERO_CROSSING);
 
    auto result = analyzer->analyze_energy({ { 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 MayaFlux::Yantra::ZERO_CROSSING.

Referenced by MayaFlux::Yantra::compute_zero_crossing_energy().

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