regions_around_positions()

std::vector< std::pair< size_t, size_t > > MayaFlux::Kinesis::Discrete::regions_around_positions	(	const std::vector< size_t > &	positions,
		size_t	half_region,
		size_t	data_size
	)

Build [start, end) intervals centred on a set of positions.

Parameters

positions	Sample indices of region centres
half_region	Radius in samples on each side
data_size	Total span length for clamping

Returns

One [start, end) pair per position

Definition at line 52 of file Extract.cpp.

{
    std::vector<std::pair<size_t, size_t>> out;
    out.reserve(positions.size());
    for (size_t pos : positions) {
        const size_t s = (pos >= half_region) ? pos - half_region : 0;
        const size_t e = std::min(pos + half_region, data_size);
        if (s < e)
            out.emplace_back(s, e);
    }
    return out;
}

Referenced by MayaFlux::Yantra::extract_onsets(), MayaFlux::Yantra::extract_peaks(), and MayaFlux::Yantra::extract_zero_crossings().

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