112 lines
2.6 KiB
C++
112 lines
2.6 KiB
C++
/****************************************************************************
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* *
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* Project64 - A Nintendo 64 emulator. *
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* http://www.pj64-emu.com/ *
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* Copyright (C) 2012 Project64. All rights reserved. *
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* *
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* License: *
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* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
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* *
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****************************************************************************/
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#include "stdafx.h"
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#include "SpeedLimiterClass.h"
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#include <Common/Util.h>
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#ifdef _WIN32
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#include <Windows.h>
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#include <Mmsystem.h>
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#pragma comment(lib, "winmm.lib")
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#endif
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CSpeedLimiter::CSpeedLimiter() :
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m_Frames(0),
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m_Speed(60),
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m_BaseSpeed(60),
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m_Ratio(1000.0F / (float)m_Speed)
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{
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}
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CSpeedLimiter::~CSpeedLimiter()
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{
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}
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void CSpeedLimiter::SetHertz(uint32_t Hertz)
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{
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m_Speed = Hertz;
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m_BaseSpeed = Hertz;
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FixSpeedRatio();
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}
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void CSpeedLimiter::FixSpeedRatio()
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{
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m_Ratio = 1000.0f / static_cast<double>(m_Speed);
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m_Frames = 0;
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}
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bool CSpeedLimiter::Timer_Process(uint32_t * FrameRate)
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{
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m_Frames += 1;
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CDateTime CurrentTime;
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CurrentTime.SetToNow();
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/* Calculate time that should of elapsed for this frame */
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uint64_t CalculatedTime = (m_LastTime.Value()) + (m_Ratio * (double)m_Frames);
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if (CurrentTime.Value() < CalculatedTime)
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{
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int32_t time = (int)(CalculatedTime - CurrentTime.Value());
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if (time > 0)
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{
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pjutil::Sleep(time);
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}
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/* Refresh current time */
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CurrentTime.SetToNow();
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}
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if (CurrentTime.Value() - m_LastTime.Value() >= 1000)
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{
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/* Output FPS */
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if (FrameRate != NULL) { *FrameRate = m_Frames; }
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m_Frames = 0;
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m_LastTime = CurrentTime;
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return true;
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}
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else
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{
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return false;
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}
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}
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void CSpeedLimiter::IncreaseSpeed()
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{
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if (m_Speed >= 60)
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{
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m_Speed += 10;
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}
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else if (m_Speed >= 15)
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{
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m_Speed += 5;
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}
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else
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{
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m_Speed += 1;
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}
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SpeedChanged(m_Speed);
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FixSpeedRatio();
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}
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void CSpeedLimiter::DecreaseSpeed()
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{
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if (m_Speed > 60)
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{
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m_Speed -= 10;
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}
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else if (m_Speed > 15)
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{
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m_Speed -= 5;
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}
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else if (m_Speed > 1)
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{
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m_Speed -= 1;
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}
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SpeedChanged(m_Speed);
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FixSpeedRatio();
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}
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