project64/Source/Project64-core/N64System/SpeedLimiterClass.h

/****************************************************************************
*                                                                           *
* Project64 - A Nintendo 64 emulator.                                       *
* http://www.pj64-emu.com/                                                  *
* Copyright (C) 2012 Project64. All rights reserved.                        *
*                                                                           *
* License:                                                                  *
* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html                        *
*                                                                           *
****************************************************************************/
#pragma once

#include <Project64-core/Settings/GameSettings.h>

#include <Common/HighResTimeStamp.h>

class CSpeedLimiter :
    private CGameSettings
{
public:
	enum ESpeedChange { INCREASE_SPEED, DECREASE_SPEED };

    CSpeedLimiter();
    ~CSpeedLimiter();

    void SetHertz(const uint32_t Hertz);
    bool Timer_Process(uint32_t* const FrameRate);

	void AlterSpeed(const ESpeedChange SpeedChange);

    void SetSpeed(int Speed);
    int GetSpeed(void) const;
    int GetBaseSpeed(void) const;

private:
    CSpeedLimiter(const CSpeedLimiter&);            // Disable copy constructor
    CSpeedLimiter& operator=(const CSpeedLimiter&); // Disable assignment

    void FixSpeedRatio();

	HighResTimeStamp m_LastTime;

    uint32_t m_Speed, m_BaseSpeed, m_Frames, m_MicroSecondsPerFrame;

	static const uint32_t m_DefaultSpeed;
};