42 lines
717 B
C
42 lines
717 B
C
#include <sys/time.h>
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#include "main.h"
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#include "throttle.h"
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static uint64 tfreq;
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static uint64 desiredfps;
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void RefreshThrottleFPS(void)
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{
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desiredfps=FCEUI_GetDesiredFPS()>>8;
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tfreq=1000000;
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tfreq<<=16; /* Adjustment for fps returned from FCEUI_GetDesiredFPS(). */
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}
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static uint64 GetCurTime(void)
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{
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uint64 ret;
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struct timeval tv;
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gettimeofday(&tv,0);
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ret=(uint64)tv.tv_sec*1000000;
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ret+=tv.tv_usec;
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return(ret);
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}
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void 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=GetCurTime();
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if( (ttime-ltime) < (tfreq/desiredfps) )
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goto waiter;
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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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