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22 lines
677 B
C++
22 lines
677 B
C++
#include "tools/beatutils.h"
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#include <iostream>
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#include <numeric>
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auto beat_utils::calculateBeatRateInfo(
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const std::vector<kku::microsec> &approximate_deltas) -> BeatInfo
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{
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if (approximate_deltas.empty())
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return {};
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const long double sum = std::accumulate(approximate_deltas.begin(),
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approximate_deltas.end(), 0);
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const long double amount = approximate_deltas.size();
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long double average = sum / amount;
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const int bpm = static_cast<int>(60000000. / average);
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return BeatInfo{bpm, static_cast<kku::microsec>(
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1. / static_cast<long double>(bpm) * 60000000.)};
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}
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