SoundEvent.h

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#pragma once
 
#include "pch.h"
 
#include "FFmpeg/AudioFrameSink.h"
 
#include <fftw3.h>
 
class SoundEvent {
private:
    std::vector<float> matchAudio;
 
    AudioFrameSink *audioFrameSink;
    mutable std::vector<uint8_t> audioData;
 
    // fftw
    mutable std::vector<float> fftwIn;
    mutable std::vector<std::complex<float>> fftwOut;
    struct fftwf_deleter {
        void operator()(fftwf_plan *f) const noexcept {
            fftwf_destroy_plan(*f);
            delete f;
        };
    };
    std::unique_ptr<fftwf_plan, fftwf_deleter> fftwPlan;
    std::size_t fftwSize;
 
    std::vector<float> matchFrequencies;
    double matchThreshold;
    std::atomic<double> matchValue;
 
    std::vector<float> findFrequencies(const std::vector<float> &samples) const;
 
public:
    SoundEvent(const std::string &filename, double matchThreshold,
               AudioFrameSink *audioFrameSink);
 
    uint8_t value() const;
};