[picodrive.git] / platform / gizmondo / emu.c

#include <windows.h>
#include <string.h>

#include <sys/stat.h>  // mkdir
#include <sys/types.h>

#include "kgsdk/Framework.h"
#include "kgsdk/Framework2D.h"
#include "kgsdk/FrameworkAudio.h"
#include "../common/emu.h"
#include "../common/lprintf.h"
#include "../common/arm_utils.h"
#include "../common/config.h"
#include "emu.h"
#include "menu.h"
#include "giz.h"
#include "asm_utils.h"

#include <pico/pico_int.h>

#ifdef BENCHMARK
#define OSD_FPS_X 220
#else
#define OSD_FPS_X 260
#endif

// main 300K gfx-related buffer. Used by menu and renderers.
unsigned char gfx_buffer[321*240*2*2];

static short *snd_cbuff = NULL;
static int snd_cbuf_samples = 0, snd_all_samples = 0;


static void blit(const char *fps, const char *notice);
static void clearArea(int full);

int plat_get_root_dir(char *dst, int len)
{
	if (len > 0) *dst = 0;

	return 0;
}

static void emu_msg_cb(const char *msg)
{
	if (giz_screen != NULL) fb_unlock();
	giz_screen = fb_lock(1);

	memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
	emu_text_out16(4, 232, msg);
	noticeMsgTime = GetTickCount() - 2000;

	/* assumption: emu_msg_cb gets called only when something slow is about to happen */
	reset_timing = 1;

	fb_unlock();
	giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
}

void emu_stateCb(const char *str)
{
	if (giz_screen != NULL) fb_unlock();
	giz_screen = fb_lock(1);

	clearArea(0);
	blit("", str);

	fb_unlock();
	giz_screen = NULL;

	Sleep(0); /* yield the CPU, the system may need it */
}

void pemu_prep_defconfig(void)
{
	defaultConfig.s_PsndRate = 22050;
	defaultConfig.s_PicoCDBuffers = 0;
	defaultConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
	defaultConfig.KeyBinds[ 3] = 1<<1;
	defaultConfig.KeyBinds[ 0] = 1<<2;
	defaultConfig.KeyBinds[ 1] = 1<<3;
	defaultConfig.KeyBinds[ 5] = 1<<4;
	defaultConfig.KeyBinds[ 6] = 1<<5;
	defaultConfig.KeyBinds[ 7] = 1<<6;
	defaultConfig.KeyBinds[ 4] = 1<<7;
	defaultConfig.KeyBinds[13] = 1<<26; // switch rend
	defaultConfig.KeyBinds[ 8] = 1<<27; // save state
	defaultConfig.KeyBinds[ 9] = 1<<28; // load state
	defaultConfig.KeyBinds[12] = 1<<29; // vol up
	defaultConfig.KeyBinds[11] = 1<<30; // vol down
	defaultConfig.scaling = 0;
}


static int EmuScanBegin16(unsigned int num)
{
	Pico.est.DrawLineDest = (unsigned short *) giz_screen + 321 * num;

	if ((currentConfig.EmuOpt&0x4000) && (num&1) == 0) // (Pico.m.frame_count&1))
		return 1; // skip next line

	return 0;
}

static int EmuScanBegin8(unsigned int num)
{
	// draw like the fast renderer
	Pico.est.HighCol = gfx_buffer + 328 * num;

	return 0;
}

static void osd_text(int x, int y, const char *text)
{
	int len = strlen(text) * 8 / 2;
	int *p, h;
	for (h = 0; h < 8; h++) {
		p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
		p = (int *) ((int)p & ~3); // align
		memset32(p, 0, len);
	}
	emu_text_out16(x, y, text);
}

static void cd_leds(void)
{
	static int old_reg = 0;
	unsigned int col_g, col_r, *p;

	if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
	old_reg = Pico_mcd->s68k_regs[0];

	p = (unsigned int *)((short *)giz_screen + 321*2+4+2);
	col_g = (old_reg & 2) ? 0x06000600 : 0;
	col_r = (old_reg & 1) ? 0xc000c000 : 0;
	*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 321/2 - 12/2 + 1;
	*p++ = col_g; p+=3; *p++ = col_r; p += 321/2 - 10/2;
	*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
}


static short localPal[0x100];

static void blit(const char *fps, const char *notice)
{
	int emu_opt = currentConfig.EmuOpt;

	if (PicoOpt&0x10)
	{
		int lines_flags = 224;
		// 8bit fast renderer
		if (Pico.m.dirtyPal) {
			Pico.m.dirtyPal = 0;
			vidConvCpyRGB565(localPal, Pico.cram, 0x40);
		}
		// a hack for VR
		if (PicoAHW & PAHW_SVP)
			memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);
		if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
		if (currentConfig.EmuOpt&0x4000)
			lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
		vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
	}
	else if (!(emu_opt&0x80))
	{
		int lines_flags;
		// 8bit accurate renderer
		if (Pico.m.dirtyPal) {
			Pico.m.dirtyPal = 0;
			vidConvCpyRGB565(localPal, Pico.cram, 0x40);
			if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
				//vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
				//vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
				memcpy32((void *)(localPal+0xc0), (void *)(localPal+0x40), 0x40*2/4);
				localPal[0xc0] = 0x0600;
				localPal[0xd0] = 0xc000;
				localPal[0xe0] = 0x0000; // reserved pixels for OSD
				localPal[0xf0] = 0xffff;
			}
			/* no support
			else if (rendstatus & 0x20) { // mid-frame palette changes
				vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
				vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
			} */
		}
		lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
		if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
		if (currentConfig.EmuOpt&0x4000)
			lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
		vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
	}

	if (notice || (emu_opt & 2)) {
		int h = 232;
		if (notice)      osd_text(4, h, notice);
		if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
	}

	if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))
		cd_leds();
}

// clears whole screen or just the notice area (in all buffers)
static void clearArea(int full)
{
	if (giz_screen == NULL)
		giz_screen = fb_lock(1);
	if (full) memset32(giz_screen, 0, 320*240*2/4);
	else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);

	if (currentConfig.EmuOpt&0x8000) {
		fb_unlock();
		giz_screen = fb_lock(0);
		if (full) memset32(giz_screen, 0, 320*240*2/4);
		else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
	}
}

static void vidResetMode(void)
{
	giz_screen = fb_lock(1);

	if (PicoOpt&0x10) {
	} else if (currentConfig.EmuOpt&0x80) {
		PicoDrawSetOutFormat(PDF_RGB555, 0);
		PicoDrawSetCallbacks(EmuScanBegin16, NULL);
	} else {
		PicoDrawSetOutFormat(PDF_NONE, 0);
		PicoDrawSetCallbacks(EmuScanBegin8, NULL);
	}
	if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
		// setup pal for 8-bit modes
		localPal[0xc0] = 0x0600;
		localPal[0xd0] = 0xc000;
		localPal[0xe0] = 0x0000; // reserved pixels for OSD
		localPal[0xf0] = 0xffff;
	}
	Pico.m.dirtyPal = 1;

	memset32(giz_screen, 0, 321*240*2/4);
	if (currentConfig.EmuOpt&0x8000) {
		fb_unlock();
		giz_screen = fb_lock(0);
		memset32(giz_screen, 0, 321*240*2/4);
	}
	fb_unlock();
	giz_screen = NULL;
}

/*
#include <stdarg.h>
static void stdbg(const char *fmt, ...)
{
	static int cnt = 0;
	va_list vl;

	sprintf(noticeMsg, "%x ", cnt++);
	va_start(vl, fmt);
	vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
	va_end(vl);

	noticeMsgTime = GetTickCount();
}
*/

static void updateSound(int len)
{
	snd_all_samples += len / 2;
	PsndOut += len / 2;
	if (PsndOut - snd_cbuff >= snd_cbuf_samples)
	{
		//if (PsndOut - snd_cbuff != snd_cbuf_samples)
		//	stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
		PsndOut = snd_cbuff;
	}
}


static void SkipFrame(void)
{
	PicoSkipFrame=1;
	PicoFrame();
	PicoSkipFrame=0;
}

/* forced frame to front buffer */
void pemu_forced_frame(int no_scale, int do_emu)
{
	int po_old = PicoOpt;
	int eo_old = currentConfig.EmuOpt;

	PicoOpt &= ~0x10;
	PicoOpt |= POPT_ACC_SPRITES;
	if (!no_scale)
		PicoOpt |= POPT_EN_SOFTSCALE;
	currentConfig.EmuOpt |= 0x80;

	if (giz_screen == NULL)
		giz_screen = fb_lock(1);

	PicoDrawSetOutFormat(PDF_RGB555, 0);
	PicoDrawSetCallbacks(EmuScanBegin16, NULL);
	Pico.m.dirtyPal = 1;
	PicoFrameDrawOnly();

	fb_unlock();
	giz_screen = NULL;

	PicoOpt = po_old;
	currentConfig.EmuOpt = eo_old;
}


static void RunEvents(unsigned int which)
{
	if (which & 0x1800) // save or load (but not both)
	{
		int do_it = 1;

		if (PsndOut != NULL)
			FrameworkAudio_SetPause(1);
		if (giz_screen == NULL)
			giz_screen = fb_lock(1);
		if ( emu_check_save_file(state_slot) &&
				(( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
				 (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
		{
			int keys;
			blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
			while( !((keys = Framework_PollGetButtons()) & (PBTN_PLAY|PBTN_STOP)) )
				Sleep(50);
			if (keys & PBTN_STOP) do_it = 0;
			while(  ((keys = Framework_PollGetButtons()) & (PBTN_PLAY|PBTN_STOP)) ) // wait for release
				Sleep(50);
			clearArea(0);
		}

		if (do_it)
		{
			osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
			PicoStateProgressCB = emu_stateCb;
			emu_save_load_game((which & 0x1000) >> 12, 0);
			PicoStateProgressCB = NULL;
			Sleep(0);
		}

		if (PsndOut != NULL)
			FrameworkAudio_SetPause(0);
		reset_timing = 1;
	}
	if (which & 0x0400) // switch renderer
	{
		if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
		else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }

		vidResetMode();

		if (PicoOpt&0x10) {
			strcpy(noticeMsg, " 8bit fast renderer");
		} else if (currentConfig.EmuOpt&0x80) {
			strcpy(noticeMsg, "16bit accurate renderer");
		} else {
			strcpy(noticeMsg, " 8bit accurate renderer");
		}

		noticeMsgTime = GetTickCount();
	}
	if (which & 0x0300)
	{
		if(which&0x0200) {
			state_slot -= 1;
			if(state_slot < 0) state_slot = 9;
		} else {
			state_slot += 1;
			if(state_slot > 9) state_slot = 0;
		}
		sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_check_save_file(state_slot) ? "USED" : "FREE");
		noticeMsgTime = GetTickCount();
	}
}

static void updateKeys(void)
{
	unsigned int keys, allActions[2] = { 0, 0 }, events;
	static unsigned int prevEvents = 0;
	int i;

	/* FIXME: port to input fw, merge with emu.c:emu_update_input() */
	keys = Framework_PollGetButtons();
	if (keys & PBTN_HOME)
		engineState = PGS_Menu;

	keys &= CONFIGURABLE_KEYS;

	PicoPad[0] = allActions[0] & 0xfff;
	PicoPad[1] = allActions[1] & 0xfff;

	if (allActions[0] & 0x7000) emu_DoTurbo(&PicoPad[0], allActions[0]);
	if (allActions[1] & 0x7000) emu_DoTurbo(&PicoPad[1], allActions[1]);

	events = (allActions[0] | allActions[1]) >> 16;

	// volume is treated in special way and triggered every frame
	if ((events & 0x6000) && PsndOut != NULL)
	{
		int vol = currentConfig.volume;
		if (events & 0x2000) {
			if (vol < 100) vol++;
		} else {
			if (vol >   0) vol--;
		}
		FrameworkAudio_SetVolume(vol, vol);
		sprintf(noticeMsg, "VOL: %02i ", vol);
		noticeMsgTime = GetTickCount();
		currentConfig.volume = vol;
	}

	events &= ~prevEvents;
	if (events) RunEvents(events);
	if (movie_data) emu_updateMovie();

	prevEvents = (allActions[0] | allActions[1]) >> 16;
}

void plat_debug_cat(char *str)
{
}

static void simpleWait(DWORD until)
{
	DWORD tval;
	int diff;

	tval = GetTickCount();
	diff = (int)until - (int)tval;
	if (diff >= 2)
		Sleep(diff - 1);

	while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
		spend_cycles(1024*2);
}

void pemu_loop(void)
{
	static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
	char fpsbuff[24]; // fps count c string
	DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
	int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
	int target_fps, target_frametime, lim_time, tval_diff, i;
	char *notice = NULL;

	lprintf("entered emu_Loop()\n");

	fpsbuff[0] = 0;

	// make sure we are in correct mode
	vidResetMode();
	if (currentConfig.scaling) PicoOpt|=0x4000;
	else PicoOpt&=~0x4000;
	Pico.m.dirtyPal = 1;
	oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;

	// pal/ntsc might have changed, reset related stuff
	target_fps = Pico.m.pal ? 50 : 60;
	target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
	reset_timing = 1;

	// prepare CD buffer
	if (PicoAHW & PAHW_MCD) PicoCDBufferInit();

	// prepare sound stuff
	PsndOut = NULL;
	if (currentConfig.EmuOpt & 4)
	{
		int ret, snd_excess_add, stereo;
		if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
			PsndRerate(Pico.m.frame_count ? 1 : 0);
		}
		stereo=(PicoOpt&8)>>3;
		snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
		snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
		lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
			PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
		ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
		if (ret != 0) {
			lprintf("FrameworkAudio_Init() failed: %i\n", ret);
			sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
			noticeMsgTime = GetTickCount();
			currentConfig.EmuOpt &= ~4;
		} else {
			FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
			PicoWriteSound = updateSound;
			snd_cbuff = FrameworkAudio_56448Buffer();
			PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
			snd_all_samples = 0;
			PsndRate_old = PsndRate;
			PicoOpt_old  = PicoOpt;
			pal_old = Pico.m.pal;
		}
	}

	// loop?
	while (engineState == PGS_Running)
	{
		int modes;

		tval = GetTickCount();
		if (reset_timing || tval < tval_prev) {
			//stdbg("timing reset");
			reset_timing = 0;
			tval_thissec = tval;
			frames_shown = frames_done = 0;
		}

		// show notice message?
		if (noticeMsgTime) {
			static int noticeMsgSum;
			if (tval - noticeMsgTime > 2000) { // > 2.0 sec
				noticeMsgTime = 0;
				clearArea(0);
				notice = 0;
			} else {
				int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
				if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
				notice = noticeMsg;
			}
		}

		// check for mode changes
		modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
		if (modes != oldmodes) {
			oldmodes = modes;
			clearArea(1);
		}

		// second passed?
		if (tval - tval_thissec >= sec_ms)
		{
#ifdef BENCHMARK
			static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
			if(++bench == 10) {
				bench = 0;
				bench_fps_s = bench_fps;
				bf[bfp++ & 3] = bench_fps;
				bench_fps = 0;
			}
			bench_fps += frames_shown;
			sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
#else
			if(currentConfig.EmuOpt & 2)
				sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
#endif
			//tval_thissec += 1000;
			tval_thissec += sec_ms;

			if (PsndOut != NULL)
			{
				/* some code which tries to sync things to audio clock, the dirty way */
				static int audio_skew_prev = 0;
				int audio_skew, adj, co = 9, shift = 7;
				audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
				if (PsndRate == 22050) co = 10;
				if (PsndRate  > 22050) co = 11;
				if (PicoOpt&8) shift++;
				if (audio_skew < 0) {
					adj = -((-audio_skew) >> shift);
					if (audio_skew > -(6<<co)) adj>>=1;
					if (audio_skew > -(4<<co)) adj>>=1;
					if (audio_skew > -(2<<co)) adj>>=1;
					if (audio_skew > audio_skew_prev) adj>>=2; // going up already
				} else {
					adj = audio_skew >> shift;
					if (audio_skew < (6<<co)) adj>>=1;
					if (audio_skew < (4<<co)) adj>>=1;
					if (audio_skew < (2<<co)) adj>>=1;
					if (audio_skew < audio_skew_prev) adj>>=2;
				}
				audio_skew_prev = audio_skew;
				target_frametime += adj;
				sec_ms = (target_frametime * target_fps) >> 8;
				//stdbg("%i %i %i", audio_skew, adj, sec_ms);
				frames_done = frames_shown = 0;
			}
			else if (currentConfig.Frameskip < 0) {
				frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
				frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
				if (frames_shown > frames_done) frames_shown = frames_done;
			} else {
				frames_done = frames_shown = 0;
			}
		}
#ifdef PFRAMES
		sprintf(fpsbuff, "%i", Pico.m.frame_count);
#endif

		tval_prev = tval;
		lim_time = (frames_done+1) * target_frametime;
		if (currentConfig.Frameskip >= 0) // frameskip enabled
		{
			for (i = 0; i < currentConfig.Frameskip; i++) {
				updateKeys();
				SkipFrame(); frames_done++;
				if (PsndOut) { // do framelimitting if sound is enabled
					int tval_diff;
					tval = GetTickCount();
					tval_diff = (int)(tval - tval_thissec) << 8;
					if (tval_diff < lim_time) // we are too fast
						simpleWait(tval + ((lim_time - tval_diff)>>8));
				}
				lim_time += target_frametime;
			}
		}
		else // auto frameskip
		{
			int tval_diff;
			tval = GetTickCount();
			tval_diff = (int)(tval - tval_thissec) << 8;
			if (tval_diff > lim_time)
			{
				// no time left for this frame - skip
				if (tval_diff - lim_time >= (300<<8)) {
					/* something caused a slowdown for us (disk access? cache flush?)
					 * try to recover by resetting timing... */
					reset_timing = 1;
					continue;
				}
				updateKeys();
				SkipFrame(); frames_done++;
				continue;
			}
		}

		updateKeys();

		if (currentConfig.EmuOpt&0x80)
			/* be sure correct framebuffer is locked */
			giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);

		PicoFrame();

		if (giz_screen == NULL)
			giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);

		blit(fpsbuff, notice);

		if (giz_screen != NULL) {
			fb_unlock();
			giz_screen = NULL;
		}

		if (currentConfig.EmuOpt&0x2000)
			Framework2D_WaitVSync();

		if (currentConfig.EmuOpt&0x8000)
			fb_flip();

		// check time
		tval = GetTickCount();
		tval_diff = (int)(tval - tval_thissec) << 8;

		if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
			reset_timing = 1;
		else if (PsndOut != NULL || currentConfig.Frameskip < 0)
		{
			// sleep if we are still too fast
			if (tval_diff < lim_time)
			{
				// we are too fast
				simpleWait(tval + ((lim_time - tval_diff) >> 8));
			}
		}

		frames_done++; frames_shown++;
	}


	if (PicoAHW & PAHW_MCD) PicoCDBufferFree();

	if (PsndOut != NULL) {
		PsndOut = snd_cbuff = NULL;
		FrameworkAudio_Close();
	}

	// save SRAM
	if ((currentConfig.EmuOpt & 1) && SRam.changed) {
		emu_stateCb("Writing SRAM/BRAM..");
		emu_save_load_game(0, 1);
		SRam.changed = 0;
	}
}
Commit	Line	Data
	1	#include <windows.h>
	2	#include <string.h>
	3
	4	#include <sys/stat.h> // mkdir
	5	#include <sys/types.h>
	6
	7	#include "kgsdk/Framework.h"
	8	#include "kgsdk/Framework2D.h"
	9	#include "kgsdk/FrameworkAudio.h"
	10	#include "../common/emu.h"
	11	#include "../common/lprintf.h"
	12	#include "../common/arm_utils.h"
	13	#include "../common/config.h"
	14	#include "emu.h"
	15	#include "menu.h"
	16	#include "giz.h"
	17	#include "asm_utils.h"
	18
	19	#include <pico/pico_int.h>
	20
	21	#ifdef BENCHMARK
	22	#define OSD_FPS_X 220
	23	#else
	24	#define OSD_FPS_X 260
	25	#endif
	26
	27	// main 300K gfx-related buffer. Used by menu and renderers.
	28	unsigned char gfx_buffer[3212402*2];
	29
	30	static short *snd_cbuff = NULL;
	31	static int snd_cbuf_samples = 0, snd_all_samples = 0;
	32
	33
	34	static void blit(const char fps, const char notice);
	35	static void clearArea(int full);
	36
	37	int plat_get_root_dir(char *dst, int len)
	38	{
	39	if (len > 0) *dst = 0;
	40
	41	return 0;
	42	}
	43
	44	static void emu_msg_cb(const char *msg)
	45	{
	46	if (giz_screen != NULL) fb_unlock();
	47	giz_screen = fb_lock(1);
	48
	49	memset32((int )((char )giz_screen + 3212322), 0, 32182/4);
	50	emu_text_out16(4, 232, msg);
	51	noticeMsgTime = GetTickCount() - 2000;
	52
	53	/* assumption: emu_msg_cb gets called only when something slow is about to happen */
	54	reset_timing = 1;
	55
	56	fb_unlock();
	57	giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
	58	}
	59
	60	void emu_stateCb(const char *str)
	61	{
	62	if (giz_screen != NULL) fb_unlock();
	63	giz_screen = fb_lock(1);
	64
	65	clearArea(0);
	66	blit("", str);
	67
	68	fb_unlock();
	69	giz_screen = NULL;
	70
	71	Sleep(0); /* yield the CPU, the system may need it */
	72	}
	73
	74	void pemu_prep_defconfig(void)
	75	{
	76	defaultConfig.s_PsndRate = 22050;
	77	defaultConfig.s_PicoCDBuffers = 0;
	78	defaultConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
	79	defaultConfig.KeyBinds[ 3] = 1<<1;
	80	defaultConfig.KeyBinds[ 0] = 1<<2;
	81	defaultConfig.KeyBinds[ 1] = 1<<3;
	82	defaultConfig.KeyBinds[ 5] = 1<<4;
	83	defaultConfig.KeyBinds[ 6] = 1<<5;
	84	defaultConfig.KeyBinds[ 7] = 1<<6;
	85	defaultConfig.KeyBinds[ 4] = 1<<7;
	86	defaultConfig.KeyBinds[13] = 1<<26; // switch rend
	87	defaultConfig.KeyBinds[ 8] = 1<<27; // save state
	88	defaultConfig.KeyBinds[ 9] = 1<<28; // load state
	89	defaultConfig.KeyBinds[12] = 1<<29; // vol up
	90	defaultConfig.KeyBinds[11] = 1<<30; // vol down
	91	defaultConfig.scaling = 0;
	92	}
	93
	94
	95	static int EmuScanBegin16(unsigned int num)
	96	{
	97	Pico.est.DrawLineDest = (unsigned short ) giz_screen + 321 num;
	98
	99	if ((currentConfig.EmuOpt&0x4000) && (num&1) == 0) // (Pico.m.frame_count&1))
	100	return 1; // skip next line
	101
	102	return 0;
	103	}
	104
	105	static int EmuScanBegin8(unsigned int num)
	106	{
	107	// draw like the fast renderer
	108	Pico.est.HighCol = gfx_buffer + 328 * num;
	109
	110	return 0;
	111	}
	112
	113	static void osd_text(int x, int y, const char *text)
	114	{
	115	int len = strlen(text) * 8 / 2;
	116	int *p, h;
	117	for (h = 0; h < 8; h++) {
	118	p = (int ) ((unsigned short ) giz_screen+x+321*(y+h));
	119	p = (int *) ((int)p & ~3); // align
	120	memset32(p, 0, len);
	121	}
	122	emu_text_out16(x, y, text);
	123	}
	124
	125	static void cd_leds(void)
	126	{
	127	static int old_reg = 0;
	128	unsigned int col_g, col_r, *p;
	129
	130	if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
	131	old_reg = Pico_mcd->s68k_regs[0];
	132
	133	p = (unsigned int )((short )giz_screen + 321*2+4+2);
	134	col_g = (old_reg & 2) ? 0x06000600 : 0;
	135	col_r = (old_reg & 1) ? 0xc000c000 : 0;
	136	p++ = col_g; p++ = col_g; p+=2; p++ = col_r; p++ = col_r; p += 321/2 - 12/2 + 1;
	137	p++ = col_g; p+=3; p++ = col_r; p += 321/2 - 10/2;
	138	p++ = col_g; p++ = col_g; p+=2; p++ = col_r; p++ = col_r;
	139	}
	140
	141
	142	static short localPal[0x100];
	143
	144	static void blit(const char fps, const char notice)
	145	{
	146	int emu_opt = currentConfig.EmuOpt;
	147
	148	if (PicoOpt&0x10)
	149	{
	150	int lines_flags = 224;
	151	// 8bit fast renderer
	152	if (Pico.m.dirtyPal) {
	153	Pico.m.dirtyPal = 0;
	154	vidConvCpyRGB565(localPal, Pico.cram, 0x40);
	155	}
	156	// a hack for VR
	157	if (PicoAHW & PAHW_SVP)
	158	memset32((int )(PicoDraw2FB+3288+328*223), 0xe0e0e0e0, 328);
	159	if (!(Pico.video.reg[12]&1)) lines_flags\|=0x10000;
	160	if (currentConfig.EmuOpt&0x4000)
	161	lines_flags\|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
	162	vidCpy8to16((unsigned short )giz_screen+3218, PicoDraw2FB+328*8, localPal, lines_flags);
	163	}
	164	else if (!(emu_opt&0x80))
	165	{
	166	int lines_flags;
	167	// 8bit accurate renderer
	168	if (Pico.m.dirtyPal) {
	169	Pico.m.dirtyPal = 0;
	170	vidConvCpyRGB565(localPal, Pico.cram, 0x40);
	171	if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
	172	//vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
	173	//vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
	174	memcpy32((void )(localPal+0xc0), (void )(localPal+0x40), 0x40*2/4);
	175	localPal[0xc0] = 0x0600;
	176	localPal[0xd0] = 0xc000;
	177	localPal[0xe0] = 0x0000; // reserved pixels for OSD
	178	localPal[0xf0] = 0xffff;
	179	}
	180	/* no support
	181	else if (rendstatus & 0x20) { // mid-frame palette changes
	182	vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
	183	vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
	184	} */
	185	}
	186	lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
	187	if (!(Pico.video.reg[12]&1)) lines_flags\|=0x10000;
	188	if (currentConfig.EmuOpt&0x4000)
	189	lines_flags\|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
	190	vidCpy8to16((unsigned short )giz_screen+3218, PicoDraw2FB+328*8, localPal, lines_flags);
	191	}
	192
	193	if (notice \|\| (emu_opt & 2)) {
	194	int h = 232;
	195	if (notice) osd_text(4, h, notice);
	196	if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
	197	}
	198
	199	if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))
	200	cd_leds();
	201	}
	202
	203	// clears whole screen or just the notice area (in all buffers)
	204	static void clearArea(int full)
	205	{
	206	if (giz_screen == NULL)
	207	giz_screen = fb_lock(1);
	208	if (full) memset32(giz_screen, 0, 3202402/4);
	209	else memset32((int )((char )giz_screen + 3212322), 0, 32182/4);
	210
	211	if (currentConfig.EmuOpt&0x8000) {
	212	fb_unlock();
	213	giz_screen = fb_lock(0);
	214	if (full) memset32(giz_screen, 0, 3202402/4);
	215	else memset32((int )((char )giz_screen + 3212322), 0, 32182/4);
	216	}
	217	}
	218
	219	static void vidResetMode(void)
	220	{
	221	giz_screen = fb_lock(1);
	222
	223	if (PicoOpt&0x10) {
	224	} else if (currentConfig.EmuOpt&0x80) {
	225	PicoDrawSetOutFormat(PDF_RGB555, 0);
	226	PicoDrawSetCallbacks(EmuScanBegin16, NULL);
	227	} else {
	228	PicoDrawSetOutFormat(PDF_NONE, 0);
	229	PicoDrawSetCallbacks(EmuScanBegin8, NULL);
	230	}
	231	if ((PicoOpt&0x10) \|\| !(currentConfig.EmuOpt&0x80)) {
	232	// setup pal for 8-bit modes
	233	localPal[0xc0] = 0x0600;
	234	localPal[0xd0] = 0xc000;
	235	localPal[0xe0] = 0x0000; // reserved pixels for OSD
	236	localPal[0xf0] = 0xffff;
	237	}
	238	Pico.m.dirtyPal = 1;
	239
	240	memset32(giz_screen, 0, 3212402/4);
	241	if (currentConfig.EmuOpt&0x8000) {
	242	fb_unlock();
	243	giz_screen = fb_lock(0);
	244	memset32(giz_screen, 0, 3212402/4);
	245	}
	246	fb_unlock();
	247	giz_screen = NULL;
	248	}
	249
	250	/*
	251	#include <stdarg.h>
	252	static void stdbg(const char *fmt, ...)
	253	{
	254	static int cnt = 0;
	255	va_list vl;
	256
	257	sprintf(noticeMsg, "%x ", cnt++);
	258	va_start(vl, fmt);
	259	vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
	260	va_end(vl);
	261
	262	noticeMsgTime = GetTickCount();
	263	}
	264	*/
	265
	266	static void updateSound(int len)
	267	{
	268	snd_all_samples += len / 2;
	269	PsndOut += len / 2;
	270	if (PsndOut - snd_cbuff >= snd_cbuf_samples)
	271	{
	272	//if (PsndOut - snd_cbuff != snd_cbuf_samples)
	273	// stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
	274	PsndOut = snd_cbuff;
	275	}
	276	}
	277
	278
	279	static void SkipFrame(void)
	280	{
	281	PicoSkipFrame=1;
	282	PicoFrame();
	283	PicoSkipFrame=0;
	284	}
	285
	286	/* forced frame to front buffer */
	287	void pemu_forced_frame(int no_scale, int do_emu)
	288	{
	289	int po_old = PicoOpt;
	290	int eo_old = currentConfig.EmuOpt;
	291
	292	PicoOpt &= ~0x10;
	293	PicoOpt \|= POPT_ACC_SPRITES;
	294	if (!no_scale)
	295	PicoOpt \|= POPT_EN_SOFTSCALE;
	296	currentConfig.EmuOpt \|= 0x80;
	297
	298	if (giz_screen == NULL)
	299	giz_screen = fb_lock(1);
	300
	301	PicoDrawSetOutFormat(PDF_RGB555, 0);
	302	PicoDrawSetCallbacks(EmuScanBegin16, NULL);
	303	Pico.m.dirtyPal = 1;
	304	PicoFrameDrawOnly();
	305
	306	fb_unlock();
	307	giz_screen = NULL;
	308
	309	PicoOpt = po_old;
	310	currentConfig.EmuOpt = eo_old;
	311	}
	312
	313
	314	static void RunEvents(unsigned int which)
	315	{
	316	if (which & 0x1800) // save or load (but not both)
	317	{
	318	int do_it = 1;
	319
	320	if (PsndOut != NULL)
	321	FrameworkAudio_SetPause(1);
	322	if (giz_screen == NULL)
	323	giz_screen = fb_lock(1);
	324	if ( emu_check_save_file(state_slot) &&
	325	(( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) \|\| // load
	326	(!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
	327	{
	328	int keys;
	329	blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
	330	while( !((keys = Framework_PollGetButtons()) & (PBTN_PLAY\|PBTN_STOP)) )
	331	Sleep(50);
	332	if (keys & PBTN_STOP) do_it = 0;
	333	while( ((keys = Framework_PollGetButtons()) & (PBTN_PLAY\|PBTN_STOP)) ) // wait for release
	334	Sleep(50);
	335	clearArea(0);
	336	}
	337
	338	if (do_it)
	339	{
	340	osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
	341	PicoStateProgressCB = emu_stateCb;
	342	emu_save_load_game((which & 0x1000) >> 12, 0);
	343	PicoStateProgressCB = NULL;
	344	Sleep(0);
	345	}
	346
	347	if (PsndOut != NULL)
	348	FrameworkAudio_SetPause(0);
	349	reset_timing = 1;
	350	}
	351	if (which & 0x0400) // switch renderer
	352	{
	353	if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt \|= 0x80; }
	354	else { PicoOpt\|= 0x10; currentConfig.EmuOpt &= ~0x80; }
	355
	356	vidResetMode();
	357
	358	if (PicoOpt&0x10) {
	359	strcpy(noticeMsg, " 8bit fast renderer");
	360	} else if (currentConfig.EmuOpt&0x80) {
	361	strcpy(noticeMsg, "16bit accurate renderer");
	362	} else {
	363	strcpy(noticeMsg, " 8bit accurate renderer");
	364	}
	365
	366	noticeMsgTime = GetTickCount();
	367	}
	368	if (which & 0x0300)
	369	{
	370	if(which&0x0200) {
	371	state_slot -= 1;
	372	if(state_slot < 0) state_slot = 9;
	373	} else {
	374	state_slot += 1;
	375	if(state_slot > 9) state_slot = 0;
	376	}
	377	sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_check_save_file(state_slot) ? "USED" : "FREE");
	378	noticeMsgTime = GetTickCount();
	379	}
	380	}
	381
	382	static void updateKeys(void)
	383	{
	384	unsigned int keys, allActions[2] = { 0, 0 }, events;
	385	static unsigned int prevEvents = 0;
	386	int i;
	387
	388	/* FIXME: port to input fw, merge with emu.c:emu_update_input() */
	389	keys = Framework_PollGetButtons();
	390	if (keys & PBTN_HOME)
	391	engineState = PGS_Menu;
	392
	393	keys &= CONFIGURABLE_KEYS;
	394
	395	PicoPad[0] = allActions[0] & 0xfff;
	396	PicoPad[1] = allActions[1] & 0xfff;
	397
	398	if (allActions[0] & 0x7000) emu_DoTurbo(&PicoPad[0], allActions[0]);
	399	if (allActions[1] & 0x7000) emu_DoTurbo(&PicoPad[1], allActions[1]);
	400
	401	events = (allActions[0] \| allActions[1]) >> 16;
	402
	403	// volume is treated in special way and triggered every frame
	404	if ((events & 0x6000) && PsndOut != NULL)
	405	{
	406	int vol = currentConfig.volume;
	407	if (events & 0x2000) {
	408	if (vol < 100) vol++;
	409	} else {
	410	if (vol > 0) vol--;
	411	}
	412	FrameworkAudio_SetVolume(vol, vol);
	413	sprintf(noticeMsg, "VOL: %02i ", vol);
	414	noticeMsgTime = GetTickCount();
	415	currentConfig.volume = vol;
	416	}
	417
	418	events &= ~prevEvents;
	419	if (events) RunEvents(events);
	420	if (movie_data) emu_updateMovie();
	421
	422	prevEvents = (allActions[0] \| allActions[1]) >> 16;
	423	}
	424
	425	void plat_debug_cat(char *str)
	426	{
	427	}
	428
	429	static void simpleWait(DWORD until)
	430	{
	431	DWORD tval;
	432	int diff;
	433
	434	tval = GetTickCount();
	435	diff = (int)until - (int)tval;
	436	if (diff >= 2)
	437	Sleep(diff - 1);
	438
	439	while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
	440	spend_cycles(1024*2);
	441	}
	442
	443	void pemu_loop(void)
	444	{
	445	static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
	446	char fpsbuff[24]; // fps count c string
	447	DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
	448	int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
	449	int target_fps, target_frametime, lim_time, tval_diff, i;
	450	char *notice = NULL;
	451
	452	lprintf("entered emu_Loop()\n");
	453
	454	fpsbuff[0] = 0;
	455
	456	// make sure we are in correct mode
	457	vidResetMode();
	458	if (currentConfig.scaling) PicoOpt\|=0x4000;
	459	else PicoOpt&=~0x4000;
	460	Pico.m.dirtyPal = 1;
	461	oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
	462
	463	// pal/ntsc might have changed, reset related stuff
	464	target_fps = Pico.m.pal ? 50 : 60;
	465	target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
	466	reset_timing = 1;
	467
	468	// prepare CD buffer
	469	if (PicoAHW & PAHW_MCD) PicoCDBufferInit();
	470
	471	// prepare sound stuff
	472	PsndOut = NULL;
	473	if (currentConfig.EmuOpt & 4)
	474	{
	475	int ret, snd_excess_add, stereo;
	476	if (PsndRate != PsndRate_old \|\| (PicoOpt&0x0b) != (PicoOpt_old&0x0b) \|\| Pico.m.pal != pal_old) {
	477	PsndRerate(Pico.m.frame_count ? 1 : 0);
	478	}
	479	stereo=(PicoOpt&8)>>3;
	480	snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
	481	snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
	482	lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
	483	PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
	484	ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
	485	if (ret != 0) {
	486	lprintf("FrameworkAudio_Init() failed: %i\n", ret);
	487	sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
	488	noticeMsgTime = GetTickCount();
	489	currentConfig.EmuOpt &= ~4;
	490	} else {
	491	FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
	492	PicoWriteSound = updateSound;
	493	snd_cbuff = FrameworkAudio_56448Buffer();
	494	PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
	495	snd_all_samples = 0;
	496	PsndRate_old = PsndRate;
	497	PicoOpt_old = PicoOpt;
	498	pal_old = Pico.m.pal;
	499	}
	500	}
	501
	502	// loop?
	503	while (engineState == PGS_Running)
	504	{
	505	int modes;
	506
	507	tval = GetTickCount();
	508	if (reset_timing \|\| tval < tval_prev) {
	509	//stdbg("timing reset");
	510	reset_timing = 0;
	511	tval_thissec = tval;
	512	frames_shown = frames_done = 0;
	513	}
	514
	515	// show notice message?
	516	if (noticeMsgTime) {
	517	static int noticeMsgSum;
	518	if (tval - noticeMsgTime > 2000) { // > 2.0 sec
	519	noticeMsgTime = 0;
	520	clearArea(0);
	521	notice = 0;
	522	} else {
	523	int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
	524	if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
	525	notice = noticeMsg;
	526	}
	527	}
	528
	529	// check for mode changes
	530	modes = ((Pico.video.reg[12]&1)<<2)\|(Pico.video.reg[1]&8);
	531	if (modes != oldmodes) {
	532	oldmodes = modes;
	533	clearArea(1);
	534	}
	535
	536	// second passed?
	537	if (tval - tval_thissec >= sec_ms)
	538	{
	539	#ifdef BENCHMARK
	540	static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
	541	if(++bench == 10) {
	542	bench = 0;
	543	bench_fps_s = bench_fps;
	544	bf[bfp++ & 3] = bench_fps;
	545	bench_fps = 0;
	546	}
	547	bench_fps += frames_shown;
	548	sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
	549	#else
	550	if(currentConfig.EmuOpt & 2)
	551	sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
	552	#endif
	553	//tval_thissec += 1000;
	554	tval_thissec += sec_ms;
	555
	556	if (PsndOut != NULL)
	557	{
	558	/* some code which tries to sync things to audio clock, the dirty way */
	559	static int audio_skew_prev = 0;
	560	int audio_skew, adj, co = 9, shift = 7;
	561	audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
	562	if (PsndRate == 22050) co = 10;
	563	if (PsndRate > 22050) co = 11;
	564	if (PicoOpt&8) shift++;
	565	if (audio_skew < 0) {
	566	adj = -((-audio_skew) >> shift);
	567	if (audio_skew > -(6<<co)) adj>>=1;
	568	if (audio_skew > -(4<<co)) adj>>=1;
	569	if (audio_skew > -(2<<co)) adj>>=1;
	570	if (audio_skew > audio_skew_prev) adj>>=2; // going up already
	571	} else {
	572	adj = audio_skew >> shift;
	573	if (audio_skew < (6<<co)) adj>>=1;
	574	if (audio_skew < (4<<co)) adj>>=1;
	575	if (audio_skew < (2<<co)) adj>>=1;
	576	if (audio_skew < audio_skew_prev) adj>>=2;
	577	}
	578	audio_skew_prev = audio_skew;
	579	target_frametime += adj;
	580	sec_ms = (target_frametime * target_fps) >> 8;
	581	//stdbg("%i %i %i", audio_skew, adj, sec_ms);
	582	frames_done = frames_shown = 0;
	583	}
	584	else if (currentConfig.Frameskip < 0) {
	585	frames_done -= target_fps; if (frames_done < 0) frames_done = 0;
	586	frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
	587	if (frames_shown > frames_done) frames_shown = frames_done;
	588	} else {
	589	frames_done = frames_shown = 0;
	590	}
	591	}
	592	#ifdef PFRAMES
	593	sprintf(fpsbuff, "%i", Pico.m.frame_count);
	594	#endif
	595
	596	tval_prev = tval;
	597	lim_time = (frames_done+1) * target_frametime;
	598	if (currentConfig.Frameskip >= 0) // frameskip enabled
	599	{
	600	for (i = 0; i < currentConfig.Frameskip; i++) {
	601	updateKeys();
	602	SkipFrame(); frames_done++;
	603	if (PsndOut) { // do framelimitting if sound is enabled
	604	int tval_diff;
	605	tval = GetTickCount();
	606	tval_diff = (int)(tval - tval_thissec) << 8;
	607	if (tval_diff < lim_time) // we are too fast
	608	simpleWait(tval + ((lim_time - tval_diff)>>8));
	609	}
	610	lim_time += target_frametime;
	611	}
	612	}
	613	else // auto frameskip
	614	{
	615	int tval_diff;
	616	tval = GetTickCount();
	617	tval_diff = (int)(tval - tval_thissec) << 8;
	618	if (tval_diff > lim_time)
	619	{
	620	// no time left for this frame - skip
	621	if (tval_diff - lim_time >= (300<<8)) {
	622	/* something caused a slowdown for us (disk access? cache flush?)
	623	* try to recover by resetting timing... */
	624	reset_timing = 1;
	625	continue;
	626	}
	627	updateKeys();
	628	SkipFrame(); frames_done++;
	629	continue;
	630	}
	631	}
	632
	633	updateKeys();
	634
	635	if (currentConfig.EmuOpt&0x80)
	636	/* be sure correct framebuffer is locked */
	637	giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
	638
	639	PicoFrame();
	640
	641	if (giz_screen == NULL)
	642	giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
	643
	644	blit(fpsbuff, notice);
	645
	646	if (giz_screen != NULL) {
	647	fb_unlock();
	648	giz_screen = NULL;
	649	}
	650
	651	if (currentConfig.EmuOpt&0x2000)
	652	Framework2D_WaitVSync();
	653
	654	if (currentConfig.EmuOpt&0x8000)
	655	fb_flip();
	656
	657	// check time
	658	tval = GetTickCount();
	659	tval_diff = (int)(tval - tval_thissec) << 8;
	660
	661	if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
	662	reset_timing = 1;
	663	else if (PsndOut != NULL \|\| currentConfig.Frameskip < 0)
	664	{
	665	// sleep if we are still too fast
	666	if (tval_diff < lim_time)
	667	{
	668	// we are too fast
	669	simpleWait(tval + ((lim_time - tval_diff) >> 8));
	670	}
	671	}
	672
	673	frames_done++; frames_shown++;
	674	}
	675
	676
	677	if (PicoAHW & PAHW_MCD) PicoCDBufferFree();
	678
	679	if (PsndOut != NULL) {
	680	PsndOut = snd_cbuff = NULL;
	681	FrameworkAudio_Close();
	682	}
	683
	684	// save SRAM
	685	if ((currentConfig.EmuOpt & 1) && SRam.changed) {
	686	emu_stateCb("Writing SRAM/BRAM..");
	687	emu_save_load_game(0, 1);
	688	SRam.changed = 0;
	689	}
	690	}
	691