53 lines
No EOL
1.3 KiB
C++
53 lines
No EOL
1.3 KiB
C++
#pragma once
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#include "../Utilities/Timer.h"
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class FrameLimiter
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{
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private:
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Timer _clockTimer;
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double _targetTime;
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double _delay;
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bool _resetRunTimers;
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public:
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FrameLimiter(double delay)
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{
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_delay = delay;
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_targetTime = _delay;
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_resetRunTimers = false;
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}
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void SetDelay(double delay)
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{
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_delay = delay;
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_resetRunTimers = true;
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}
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void ProcessFrame()
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{
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if(_resetRunTimers || (_clockTimer.GetElapsedMS() - _targetTime) > 300) {
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//Reset the timers, this can happen in 3 scenarios:
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//1) Target frame rate changed
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//2) The console was reset/power cycled or the emulation was paused (with or without the debugger)
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//3) As a satefy net, if we overshoot our target by over 300 milliseconds, the timer is reset, too.
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// This can happen when something slows the emulator down severely (or when breaking execution in VS when debugging Mesen itself, etc.)
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_clockTimer.Reset();
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_targetTime = 0;
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_resetRunTimers = false;
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}
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_targetTime += _delay;
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}
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bool WaitForNextFrame()
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{
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if(_targetTime - _clockTimer.GetElapsedMS() > 50) {
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//When sleeping for a long time (e.g <= 25% speed), sleep in small chunks and check to see if we need to stop sleeping between each sleep call
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_clockTimer.WaitUntil(_clockTimer.GetElapsedMS() + 40);
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return true;
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}
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_clockTimer.WaitUntil(_targetTime);
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return false;
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}
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}; |