extract_overlapping_windows()

std::vector< std::vector< double > > MayaFlux::Yantra::extract_overlapping_windows	(	const std::vector< std::span< const double > > &	data,
		uint32_t	window_size = 512,
		double	overlap = 0.5
	)

Extract overlapping windows of actual data.

Parameters

data	Input data span
window_size	Size of each window
overlap	Overlap ratio (0.0 to 1.0)

Returns

Vector of data segments (each segment contains actual data values)

Definition at line 385 of file ExtractionHelper.cpp.

{
    std::vector<std::vector<double>> result;
    result.reserve(data.size());
 
    if (window_size == 0 || overlap < 0.0 || overlap >= 1.0) {
        for (size_t i = 0; i < data.size(); ++i)
            result.emplace_back();
        return result;
    }
 
    for (const auto& channel : data) {
        if (channel.empty() || window_size > channel.size()) {
            result.emplace_back();
            continue;
        }
 
        const auto hop_size = std::max(1U, static_cast<uint32_t>(window_size * (1.0 - overlap)));
        std::vector<double> channel_windows;
 
        for (size_t start = 0; start + window_size <= channel.size(); start += hop_size) {
            channel_windows.insert(channel_windows.end(),
                channel.begin() + start,
                channel.begin() + start + window_size);
        }
 
        result.push_back(std::move(channel_windows));
    }
 
    return result;
}

Referenced by MayaFlux::Yantra::FeatureExtractor< InputType, OutputType >::extract_implementation().

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