33 lines
700 B
C++
33 lines
700 B
C++
#pragma once
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/**
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* @file oscillation.hpp
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* @brief FFT-based oscillation detection (Phase 25).
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*/
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#include <vector>
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namespace fces {
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class OscillationDetector {
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public:
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static constexpr int WINDOW_SIZE = 64;
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static constexpr float POWER_THRESHOLD = 0.5f;
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static constexpr int MIN_PERIOD = 4;
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static constexpr int MAX_PERIOD = 16;
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void update(float loss);
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bool detect() const;
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float get_score() const;
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float get_variance_50() const;
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void reset();
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private:
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std::vector<float> loss_history_;
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static std::vector<float> detrend(const std::vector<float> &signal);
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static std::vector<float>
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compute_power_spectrum(const std::vector<float> &signal);
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};
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} // namespace fces
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