monotonic_timestamp.hpp

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#pragma once
 
#include <chrono>
 
namespace pulp::midi {

class MonotonicMidiClock {
public:
    using clock = std::chrono::steady_clock;

    void reset(clock::time_point now) {
        base_ = now;
        has_base_ = true;
    }
    void reset() { reset(clock::now()); }

    double seconds_since_open(clock::time_point now) const {
        if (!has_base_) return 0.0;
        return std::chrono::duration<double>(now - base_).count();
    }
    double seconds_since_open() const { return seconds_since_open(clock::now()); }
 
    bool has_base() const { return has_base_; }
 
private:
    clock::time_point base_{};
    bool has_base_ = false;
};
 
}  // namespace pulp::midi