#include <ultra64.h>
#include "constants.h"
#include "game/timing.h"
#include "bss.h"
#include "data.h"
#include "types.h"

void frametimeInit(void)
{
	g_Vars.thisframetime = osGetCount();
	g_Vars.lastframetime = g_Vars.thisframetime;
}

void frametimeApply(s32 diffframe60, s32 diffframe240, s32 frametime)
{
	g_Vars.lastframetime = g_Vars.thisframetime;
	g_Vars.thisframetime = frametime;

	g_Vars.diffframe60 = diffframe60;
	g_Vars.diffframe60f = diffframe60;
	g_Vars.diffframe60freal = PALUPF(g_Vars.diffframe60f);

	g_Vars.lastframe240 = g_Vars.thisframe240;
	g_Vars.thisframe240 += diffframe240;
	g_Vars.diffframe240 = diffframe240;
	g_Vars.diffframe240f = diffframe240;
	g_Vars.diffframe240freal = PALUPF(g_Vars.diffframe240f);
}

void frametimeCalculate(void)
{
	u32 count;
	u32 thisframeticks;
	u32 diffframe60;
	u32 diffframe240;

	do {
		count = osGetCount();
		thisframeticks = count - g_Vars.thisframetime;
		g_Vars.thisframeticks = thisframeticks;

#if PAL
		diffframe60 = (g_Vars.lostframetime + thisframeticks + 468750) / 937500;
		diffframe240 = (g_Vars.lostframetime240 + thisframeticks + 117187) / 234375;
#else
		diffframe60 = (g_Vars.lostframetime + thisframeticks + 390625) / 781250;
		diffframe240 = (g_Vars.lostframetime240 + thisframeticks + 97656) / 195312;
#endif
	} while (diffframe60 < g_Vars.mininc60);

#if PAL
	g_Vars.lostframetime = (g_Vars.lostframetime + thisframeticks) - (diffframe60 * 937500);
	g_Vars.lostframetime240 = (g_Vars.lostframetime240 + thisframeticks) - (diffframe240 * 234375);
#else
	g_Vars.lostframetime = (g_Vars.lostframetime + thisframeticks) - (diffframe60 * 781250);
	g_Vars.lostframetime240 = (g_Vars.lostframetime240 + thisframeticks) - (diffframe240 * 195312);
#endif
	g_Vars.mininc60 = 1;

	frametimeApply(diffframe60, diffframe240, count);
}

void func0f16cf8c(s32 arg0)
{
	// empty
}

void func0f16cf94(void)
{
	// empty
}