detect_onsets_per_channel()

MAYAFLUX_API std::vector< std::vector< double > > MayaFlux::detect_onsets_per_channel	(	const std::vector< Kakshya::DataVariant > &	channels,
		double	sample_rate = 48000.0,
		double	threshold = 0.1
	)

Detect onset times per channel for multi-channel signal.

Parameters

channels	Vector of channel data
sample_rate	Sample rate for time calculation (default: 48000 Hz)
threshold	Energy threshold for onset detection (default: 0.1)

Returns

Vector of onset times for each channel

Definition at line 458 of file Yantra.cpp.

{
    std::vector<std::vector<double>> all_onsets;
    all_onsets.reserve(channels.size());
 
    for (const auto& channel : channels) {
        auto double_data = std::get<std::vector<double>>(channel);
        std::span<const double> data_span(double_data.data(), double_data.size());
 
        auto onset_sample_positions = Yantra::find_onset_positions(
            data_span,
            1024,
            512,
            threshold);
 
        std::vector<double> onset_times;
        onset_times.reserve(onset_sample_positions.size());
        for (size_t sample_pos : onset_sample_positions) {
            onset_times.push_back(static_cast<double>(sample_pos) / sample_rate);
        }
 
        all_onsets.push_back(onset_times);
    }
 
    return all_onsets;
}

References MayaFlux::Yantra::find_onset_positions().

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