563103b890
git-svn-id: https://clonekeenplus.svn.sourceforge.net/svnroot/clonekeenplus/cgenius/trunk@5 4df4b0f3-56ce-47cb-b001-ed939b7d65a6
85 lines
1.5 KiB
C++
85 lines
1.5 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 <SDL.h>
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#include "CTimer.h"
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typedef char int8;
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typedef short int16;
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typedef long int32;
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typedef unsigned char uint8;
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typedef unsigned short uint16;
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typedef unsigned long uint32;
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#ifdef __GNUC__
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typedef unsigned long long uint64;
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typedef long long int64;
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#define INLINE inline
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#define GINLINE inline
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#endif
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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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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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}
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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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static uint64 ttime,ltime=0;
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waiter:
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ttime=SDL_GetTicks();
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ttime*=10000;
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if( (ttime-ltime) < (tfreq/desiredfps) )
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{
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int64 delay;
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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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goto waiter;
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}
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if( (ttime-ltime) >= (tfreq*4/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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tfreq=10000000;
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tfreq<<=16; /* Adjustment for fps returned from FCEUI_GetDesiredFPS(). */
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}
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