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#pragma once
#include "nes/common/types.hh"
namespace nes
{
/// Counts frames.
class fps_counter
{
static constexpr auto buffer_size = u32{ 20 };
u32 frame_times_[buffer_size]{}; // The time until the next frame for the last <buffer_size> frames.
u32 buffer_position_{ 0 }; // Position in the ring buffer.
u32 buffered_fps_{ 0 }; // Delay updates to FPS to one update per round in the ring buffer.
public:
explicit fps_counter() = default;
auto frame(u32 elapsed_time_us) -> void;
auto get_fps() const -> u32 { return buffered_fps_; }
};
} // namespace nes
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