gerstrong
053a44eeae
git-svn-id: https://clonekeenplus.svn.sourceforge.net/svnroot/clonekeenplus/cgenius/trunk@27 4df4b0f3-56ce-47cb-b001-ed939b7d65a6
102 lines
1.7 KiB
C++
102 lines
1.7 KiB
C++
/*
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* CTimer.cpp
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*
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* Created on: 26.03.2009
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* Author: gerstrong
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*/
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#include "../keen.h"
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#include "../keenext.h"
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#include "CTimer.h"
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#include "CVideoDriver.h"
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Uint32 FPSCallback(Uint32 interval, void* param);
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static uint64 tfreq;
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static uint64 desiredfps;
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SDL_TimerID ckp_timer_id;
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Uint32 FPSCallback(Uint32 interval, void* param)
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{
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fps = (curfps << 1);
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curfps = 0;
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unsigned char targetfps;
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targetfps = g_pVideoDriver->getTargetFPS();
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if(targetfps > 0 && fps > 0)
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{
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if(fps > targetfps + 10)
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{
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uint8 fsk;
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fsk = g_pVideoDriver->getFrameskip();
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if(fsk < 20)
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fsk++;
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g_pVideoDriver->setFrameskip(fsk);
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}
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else if( fps < targetfps - 10)
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{
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uint8 fsk;
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fsk = g_pVideoDriver->getFrameskip();
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if(fsk > 0)
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fsk--;
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g_pVideoDriver->setFrameskip(fsk);
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}
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}
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return interval;
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}
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CTimer::CTimer() {
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RefreshThrottleFPS();
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if(SDL_Init(SDL_INIT_TIMER) == 0)
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ckp_timer_id = SDL_AddTimer(1000, FPSCallback, NULL);
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ltime = 0;
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m_frameskip = 0;
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}
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CTimer::~CTimer() {
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SDL_RemoveTimer(ckp_timer_id);
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}
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void CTimer::SpeedThrottle(void)
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{
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//regulateFrameskip();
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waiter:
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ttime=SDL_GetTicks();
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//ttime*=10000;
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ttime<<=14;
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if( (ttime-ltime) < (tfreq/desiredfps) )
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{
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delay=(tfreq/desiredfps)-(ttime-ltime);
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if(delay>0)
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//SDL_Delay(delay/10000);
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SDL_Delay(delay>>14);
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goto waiter;
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}
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if( (ttime-ltime) >= ((tfreq<<2)/desiredfps) )
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ltime=ttime;
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else
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ltime+=tfreq/desiredfps;
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}
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void CTimer::RefreshThrottleFPS(void)
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{
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// desiredfps=FCEUI_GetDesiredFPS()>>8;
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// desiredfps = 23000000;
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//desiredfps = 21800000;
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desiredfps = 13600000;
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tfreq=10000000;
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tfreq<<=16; /* Adjustment for fps returned from FCEUI_GetDesiredFPS(). */
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}
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