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

/*\r
 * PicoDrive\r
 * (C) notaz, 2007-2010\r
 *\r
 * This work is licensed under the terms of MAME license.\r
 * See COPYING file in the top-level directory.\r
 */\r
\r
#include <stdio.h>\r
#include <stdlib.h>\r
#include <string.h>\r
#include <stdarg.h>\r
#ifdef __GP2X__\r
#include <unistd.h>\r
#endif\r
\r
#include "../libpicofe/posix.h"\r
#include "../libpicofe/input.h"\r
#include "../libpicofe/fonts.h"\r
#include "../libpicofe/sndout.h"\r
#include "../libpicofe/lprintf.h"\r
#include "../libpicofe/plat.h"\r
#include "emu.h"\r
#include "input_pico.h"\r
#include "menu_pico.h"\r
#include "config_file.h"\r
\r
#include <pico/pico_int.h>\r
#include <pico/patch.h>\r
\r
#ifndef _WIN32\r
#define PATH_SEP      "/"\r
#define PATH_SEP_C    '/'\r
#else\r
#define PATH_SEP      "\\"\r
#define PATH_SEP_C    '\\'\r
#endif\r
\r
#define STATUS_MSG_TIMEOUT 2000\r
\r
void *g_screen_ptr;\r
\r
int g_screen_width  = 320;\r
int g_screen_height = 240;\r
\r
const char *PicoConfigFile = "config2.cfg";\r
currentConfig_t currentConfig, defaultConfig;\r
int state_slot = 0;\r
int config_slot = 0, config_slot_current = 0;\r
int pico_pen_x = 320/2, pico_pen_y = 240/2;\r
int pico_inp_mode;\r
int flip_after_sync;\r
int engineState = PGS_Menu;\r
\r
static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
\r
/* tmp buff to reduce stack usage for plats with small stack */\r
static char static_buff[512];\r
const char *rom_fname_reload;\r
char rom_fname_loaded[512];\r
int reset_timing = 0;\r
static unsigned int notice_msg_time;	/* when started showing */\r
static char noticeMsg[40];\r
\r
unsigned char *movie_data = NULL;\r
static int movie_size = 0;\r
\r
\r
/* don't use tolower() for easy old glibc binary compatibility */\r
static void strlwr_(char *string)\r
{\r
	char *p;\r
	for (p = string; *p; p++)\r
		if ('A' <= *p && *p <= 'Z')\r
			*p += 'a' - 'A';\r
}\r
\r
static int try_rfn_cut(char *fname)\r
{\r
	FILE *tmp;\r
	char *p;\r
\r
	p = fname + strlen(fname) - 1;\r
	for (; p > fname; p--)\r
		if (*p == '.') break;\r
	*p = 0;\r
\r
	if((tmp = fopen(fname, "rb"))) {\r
		fclose(tmp);\r
		return 1;\r
	}\r
	return 0;\r
}\r
\r
static void get_ext(const char *file, char *ext)\r
{\r
	const char *p;\r
\r
	p = file + strlen(file) - 4;\r
	if (p < file) p = file;\r
	strncpy(ext, p, 4);\r
	ext[4] = 0;\r
	strlwr_(ext);\r
}\r
\r
static void fname_ext(char *dst, int dstlen, const char *prefix, const char *ext, const char *fname)\r
{\r
	int prefix_len = 0;\r
	const char *p;\r
\r
	*dst = 0;\r
	if (prefix) {\r
		int len = plat_get_root_dir(dst, dstlen);\r
		strcpy(dst + len, prefix);\r
		prefix_len = len + strlen(prefix);\r
	}\r
\r
	p = fname + strlen(fname) - 1;\r
	for (; p >= fname && *p != PATH_SEP_C; p--)\r
		;\r
	p++;\r
	strncpy(dst + prefix_len, p, dstlen - prefix_len - 1);\r
\r
	dst[dstlen - 8] = 0;\r
	if (dst[strlen(dst) - 4] == '.')\r
		dst[strlen(dst) - 4] = 0;\r
	if (ext)\r
		strcat(dst, ext);\r
}\r
\r
static void romfname_ext(char *dst, int dstlen, const char *prefix, const char *ext)\r
{\r
	fname_ext(dst, dstlen, prefix, ext, rom_fname_loaded);\r
}\r
\r
void emu_status_msg(const char *format, ...)\r
{\r
	va_list vl;\r
	int ret;\r
\r
	va_start(vl, format);\r
	ret = vsnprintf(noticeMsg, sizeof(noticeMsg), format, vl);\r
	va_end(vl);\r
\r
	/* be sure old text gets overwritten */\r
	for (; ret < 28; ret++)\r
		noticeMsg[ret] = ' ';\r
	noticeMsg[ret] = 0;\r
\r
	notice_msg_time = plat_get_ticks_ms();\r
}\r
\r
static const char * const biosfiles_us[] = {\r
	"us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"\r
};\r
static const char * const biosfiles_eu[] = {\r
	"eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"\r
};\r
static const char * const biosfiles_jp[] = {\r
	"jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"\r
};\r
\r
static const char *find_bios(int *region, const char *cd_fname)\r
{\r
	int i, count;\r
	const char * const *files;\r
	FILE *f = NULL;\r
	int ret;\r
\r
	// we need to have config loaded at this point\r
	ret = emu_read_config(cd_fname, 0);\r
	if (!ret) emu_read_config(NULL, 0);\r
\r
	if (PicoRegionOverride) {\r
		*region = PicoRegionOverride;\r
		lprintf("override region to %s\n", *region != 4 ?\r
			(*region == 8 ? "EU" : "JAP") : "USA");\r
	}\r
\r
	if (*region == 4) { // US\r
		files = biosfiles_us;\r
		count = sizeof(biosfiles_us) / sizeof(char *);\r
	} else if (*region == 8) { // EU\r
		files = biosfiles_eu;\r
		count = sizeof(biosfiles_eu) / sizeof(char *);\r
	} else if (*region == 1 || *region == 2) {\r
		files = biosfiles_jp;\r
		count = sizeof(biosfiles_jp) / sizeof(char *);\r
	} else {\r
		return 0;\r
	}\r
\r
	for (i = 0; i < count; i++)\r
	{\r
		emu_make_path(static_buff, files[i], sizeof(static_buff) - 4);\r
		strcat(static_buff, ".bin");\r
		f = fopen(static_buff, "rb");\r
		if (f) break;\r
\r
		static_buff[strlen(static_buff) - 4] = 0;\r
		strcat(static_buff, ".zip");\r
		f = fopen(static_buff, "rb");\r
		if (f) break;\r
	}\r
\r
	if (f) {\r
		lprintf("using bios: %s\n", static_buff);\r
		fclose(f);\r
		return static_buff;\r
	} else {\r
		sprintf(static_buff, "no %s BIOS files found, read docs",\r
			*region != 4 ? (*region == 8 ? "EU" : "JAP") : "USA");\r
		menu_update_msg(static_buff);\r
		return NULL;\r
	}\r
}\r
\r
/* check if the name begins with BIOS name */\r
/*\r
static int emu_isBios(const char *name)\r
{\r
	int i;\r
	for (i = 0; i < sizeof(biosfiles_us)/sizeof(biosfiles_us[0]); i++)\r
		if (strstr(name, biosfiles_us[i]) != NULL) return 1;\r
	for (i = 0; i < sizeof(biosfiles_eu)/sizeof(biosfiles_eu[0]); i++)\r
		if (strstr(name, biosfiles_eu[i]) != NULL) return 1;\r
	for (i = 0; i < sizeof(biosfiles_jp)/sizeof(biosfiles_jp[0]); i++)\r
		if (strstr(name, biosfiles_jp[i]) != NULL) return 1;\r
	return 0;\r
}\r
*/\r
\r
static int extract_text(char *dest, const unsigned char *src, int len, int swab)\r
{\r
	char *p = dest;\r
	int i;\r
\r
	if (swab) swab = 1;\r
\r
	for (i = len - 1; i >= 0; i--)\r
	{\r
		if (src[i^swab] != ' ') break;\r
	}\r
	len = i + 1;\r
\r
	for (i = 0; i < len; i++)\r
	{\r
		unsigned char s = src[i^swab];\r
		if (s >= 0x20 && s < 0x7f && s != '#' && s != '|' &&\r
			s != '[' && s != ']' && s != '\\')\r
		{\r
			*p++ = s;\r
		}\r
		else\r
		{\r
			sprintf(p, "\\%02x", s);\r
			p += 3;\r
		}\r
	}\r
\r
	return p - dest;\r
}\r
\r
static char *emu_make_rom_id(const char *fname)\r
{\r
	static char id_string[3+0xe*3+0x3*3+0x30*3+3];\r
	int pos, swab = 1;\r
\r
	if (PicoAHW & PAHW_MCD) {\r
		strcpy(id_string, "CD|");\r
		swab = 0;\r
	}\r
	else if (PicoAHW & PAHW_SMS)\r
		strcpy(id_string, "MS|");\r
	else	strcpy(id_string, "MD|");\r
	pos = 3;\r
\r
	if (!(PicoAHW & PAHW_SMS)) {\r
		pos += extract_text(id_string + pos, media_id_header + 0x80, 0x0e, swab); // serial\r
		id_string[pos] = '|'; pos++;\r
		pos += extract_text(id_string + pos, media_id_header + 0xf0, 0x03, swab); // region\r
		id_string[pos] = '|'; pos++;\r
		pos += extract_text(id_string + pos, media_id_header + 0x50, 0x30, swab); // overseas name\r
		id_string[pos] = 0;\r
		if (pos > 5)\r
			return id_string;\r
		pos = 3;\r
	}\r
\r
	// can't find name in ROM, use filename\r
	fname_ext(id_string + 3, sizeof(id_string) - 3, NULL, NULL, fname);\r
\r
	return id_string;\r
}\r
\r
// buffer must be at least 150 byte long\r
void emu_get_game_name(char *str150)\r
{\r
	int ret, swab = (PicoAHW & PAHW_MCD) ? 0 : 1;\r
	char *s, *d;\r
\r
	ret = extract_text(str150, media_id_header + 0x50, 0x30, swab); // overseas name\r
\r
	for (s = d = str150 + 1; s < str150+ret; s++)\r
	{\r
		if (*s == 0) break;\r
		if (*s != ' ' || d[-1] != ' ')\r
			*d++ = *s;\r
	}\r
	*d = 0;\r
}\r
\r
static void system_announce(void)\r
{\r
	const char *sys_name, *tv_standard, *extra = "";\r
	int fps;\r
\r
	if (PicoAHW & PAHW_SMS) {\r
		sys_name = "Master System";\r
#ifdef NO_SMS\r
		extra = " [no support]";\r
#endif\r
	} else if (PicoAHW & PAHW_PICO) {\r
		sys_name = "Pico";\r
	} else if ((PicoAHW & (PAHW_32X|PAHW_MCD)) == (PAHW_32X|PAHW_MCD)) {\r
		sys_name = "32X + Mega CD";\r
		if ((Pico.m.hardware & 0xc0) == 0x80)\r
			sys_name = "32X + Sega CD";\r
	} else if (PicoAHW & PAHW_MCD) {\r
		sys_name = "Mega CD";\r
		if ((Pico.m.hardware & 0xc0) == 0x80)\r
			sys_name = "Sega CD";\r
	} else if (PicoAHW & PAHW_32X) {\r
		sys_name = "32X";\r
	} else {\r
		sys_name = "MegaDrive";\r
		if ((Pico.m.hardware & 0xc0) == 0x80)\r
			sys_name = "Genesis";\r
	}\r
	tv_standard = Pico.m.pal ? "PAL" : "NTSC";\r
	fps = Pico.m.pal ? 50 : 60;\r
\r
	emu_status_msg("%s %s / %dFPS%s", tv_standard, sys_name, fps, extra);\r
}\r
\r
static void do_region_override(const char *media_fname)\r
{\r
	// we only need to override region if config tells us so\r
	int ret = emu_read_config(media_fname, 0);\r
	if (!ret) emu_read_config(NULL, 0);\r
}\r
\r
int emu_reload_rom(const char *rom_fname_in)\r
{\r
	// use setting before rom config is loaded\r
	int autoload = g_autostateld_opt;\r
	char *rom_fname = NULL;\r
	char ext[5];\r
	enum media_type_e media_type;\r
	int menu_romload_started = 0;\r
	char carthw_path[512];\r
	int retval = 0;\r
\r
	lprintf("emu_ReloadRom(%s)\n", rom_fname_in);\r
\r
	rom_fname = strdup(rom_fname_in);\r
	if (rom_fname == NULL)\r
		return 0;\r
\r
	get_ext(rom_fname, ext);\r
\r
	// early cleanup\r
	PicoPatchUnload();\r
	if (movie_data) {\r
		free(movie_data);\r
		movie_data = 0;\r
	}\r
\r
	if (!strcmp(ext, ".gmv"))\r
	{\r
		// check for both gmv and rom\r
		int dummy;\r
		FILE *movie_file = fopen(rom_fname, "rb");\r
		if (!movie_file) {\r
			menu_update_msg("Failed to open movie.");\r
			goto out;\r
		}\r
		fseek(movie_file, 0, SEEK_END);\r
		movie_size = ftell(movie_file);\r
		fseek(movie_file, 0, SEEK_SET);\r
		if (movie_size < 64+3) {\r
			menu_update_msg("Invalid GMV file.");\r
			fclose(movie_file);\r
			goto out;\r
		}\r
		movie_data = malloc(movie_size);\r
		if (movie_data == NULL) {\r
			menu_update_msg("low memory.");\r
			fclose(movie_file);\r
			goto out;\r
		}\r
		dummy = fread(movie_data, 1, movie_size, movie_file);\r
		fclose(movie_file);\r
		if (strncmp((char *)movie_data, "Gens Movie TEST", 15) != 0) {\r
			menu_update_msg("Invalid GMV file.");\r
			goto out;\r
		}\r
		dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);\r
		if (!dummy) {\r
			menu_update_msg("Could't find a ROM for movie.");\r
			goto out;\r
		}\r
		get_ext(rom_fname, ext);\r
		lprintf("gmv loaded for %s\n", rom_fname);\r
	}\r
	else if (!strcmp(ext, ".pat"))\r
	{\r
		int dummy;\r
		PicoPatchLoad(rom_fname);\r
		dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);\r
		if (!dummy) {\r
			menu_update_msg("Could't find a ROM to patch.");\r
			goto out;\r
		}\r
		get_ext(rom_fname, ext);\r
	}\r
\r
	menu_romload_prepare(rom_fname); // also CD load\r
	menu_romload_started = 1;\r
\r
	emu_make_path(carthw_path, "carthw.cfg", sizeof(carthw_path));\r
\r
	media_type = PicoLoadMedia(rom_fname, carthw_path,\r
			find_bios, do_region_override);\r
\r
	switch (media_type) {\r
	case PM_BAD_DETECT:\r
		menu_update_msg("Not a ROM/CD img selected.");\r
		goto out;\r
	case PM_BAD_CD:\r
		menu_update_msg("Invalid CD image");\r
		goto out;\r
	case PM_BAD_CD_NO_BIOS:\r
		// find_bios() prints a message\r
		goto out;\r
	case PM_ERROR:\r
		menu_update_msg("Load error");\r
		goto out;\r
	default:\r
		break;\r
	}\r
\r
	// make quirks visible in UI\r
	if (PicoQuirks & PQUIRK_FORCE_6BTN)\r
		currentConfig.input_dev0 = PICO_INPUT_PAD_6BTN;\r
\r
	menu_romload_end();\r
	menu_romload_started = 0;\r
\r
	if (PicoPatches) {\r
		PicoPatchPrepare();\r
		PicoPatchApply();\r
	}\r
\r
	// additional movie stuff\r
	if (movie_data)\r
	{\r
		enum input_device indev = (movie_data[0x14] == '6') ?\r
			PICO_INPUT_PAD_6BTN : PICO_INPUT_PAD_3BTN;\r
		PicoSetInputDevice(0, indev);\r
		PicoSetInputDevice(1, indev);\r
\r
		PicoOpt |= POPT_DIS_VDP_FIFO; // no VDP fifo timing\r
		if (movie_data[0xF] >= 'A') {\r
			if (movie_data[0x16] & 0x80) {\r
				PicoRegionOverride = 8;\r
			} else {\r
				PicoRegionOverride = 4;\r
			}\r
			PicoReset();\r
			// TODO: bits 6 & 5\r
		}\r
		movie_data[0x18+30] = 0;\r
		emu_status_msg("MOVIE: %s", (char *) &movie_data[0x18]);\r
	}\r
	else\r
	{\r
		system_announce();\r
		PicoOpt &= ~POPT_DIS_VDP_FIFO;\r
	}\r
\r
	strncpy(rom_fname_loaded, rom_fname, sizeof(rom_fname_loaded)-1);\r
	rom_fname_loaded[sizeof(rom_fname_loaded)-1] = 0;\r
\r
	// load SRAM for this ROM\r
	if (currentConfig.EmuOpt & EOPT_EN_SRAM)\r
		emu_save_load_game(1, 1);\r
\r
	// state autoload?\r
	if (autoload) {\r
		int time, newest = 0, newest_slot = -1;\r
		int slot;\r
\r
		for (slot = 0; slot < 10; slot++) {\r
			if (emu_check_save_file(slot, &time)) {\r
				if (time > newest) {\r
					newest = time;\r
					newest_slot = slot;\r
				}\r
			}\r
		}\r
\r
		if (newest_slot >= 0) {\r
			lprintf("autoload slot %d\n", newest_slot);\r
			state_slot = newest_slot;\r
			emu_save_load_game(1, 0);\r
		}\r
		else {\r
			lprintf("no save to autoload.\n");\r
		}\r
	}\r
\r
	retval = 1;\r
out:\r
	if (menu_romload_started)\r
		menu_romload_end();\r
	free(rom_fname);\r
	return retval;\r
}\r
\r
int emu_swap_cd(const char *fname)\r
{\r
	enum cd_img_type cd_type;\r
	int ret = -1;\r
\r
	cd_type = PicoCdCheck(fname, NULL);\r
	if (cd_type != CIT_NOT_CD)\r
		ret = cdd_load(fname, cd_type);\r
	if (ret != 0) {\r
		menu_update_msg("Load failed, invalid CD image?");\r
		return 0;\r
	}\r
\r
	strncpy(rom_fname_loaded, fname, sizeof(rom_fname_loaded)-1);\r
	rom_fname_loaded[sizeof(rom_fname_loaded) - 1] = 0;\r
\r
	return 1;\r
}\r
\r
// <base dir><end>\r
void emu_make_path(char *buff, const char *end, int size)\r
{\r
	int pos, end_len;\r
\r
	end_len = strlen(end);\r
	pos = plat_get_root_dir(buff, size);\r
	strncpy(buff + pos, end, size - pos);\r
	buff[size - 1] = 0;\r
	if (pos + end_len > size - 1)\r
		lprintf("Warning: path truncated: %s\n", buff);\r
}\r
\r
static void make_config_cfg(char *cfg_buff_512)\r
{\r
	emu_make_path(cfg_buff_512, PicoConfigFile, 512-6);\r
	if (config_slot != 0)\r
	{\r
		char *p = strrchr(cfg_buff_512, '.');\r
		if (p == NULL)\r
			p = cfg_buff_512 + strlen(cfg_buff_512);\r
		sprintf(p, ".%i.cfg", config_slot);\r
	}\r
	cfg_buff_512[511] = 0;\r
}\r
\r
void emu_prep_defconfig(void)\r
{\r
	memset(&defaultConfig, 0, sizeof(defaultConfig));\r
	defaultConfig.EmuOpt    = 0x9d | EOPT_EN_CD_LEDS;\r
	defaultConfig.s_PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 |\r
				  POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX |\r
				  POPT_EN_DRC|POPT_ACC_SPRITES |\r
				  POPT_EN_32X|POPT_EN_PWM;\r
	defaultConfig.s_PsndRate = 44100;\r
	defaultConfig.s_PicoRegion = 0; // auto\r
	defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP\r
	defaultConfig.s_PicoCDBuffers = 0;\r
	defaultConfig.confirm_save = EOPT_CONFIRM_SAVE;\r
	defaultConfig.Frameskip = -1; // auto\r
	defaultConfig.input_dev0 = PICO_INPUT_PAD_3BTN;\r
	defaultConfig.input_dev1 = PICO_INPUT_PAD_3BTN;\r
	defaultConfig.volume = 50;\r
	defaultConfig.gamma = 100;\r
	defaultConfig.scaling = 0;\r
	defaultConfig.turbo_rate = 15;\r
	defaultConfig.msh2_khz = PICO_MSH2_HZ / 1000;\r
	defaultConfig.ssh2_khz = PICO_SSH2_HZ / 1000;\r
\r
	// platform specific overrides\r
	pemu_prep_defconfig();\r
}\r
\r
void emu_set_defconfig(void)\r
{\r
	memcpy(&currentConfig, &defaultConfig, sizeof(currentConfig));\r
	PicoOpt = currentConfig.s_PicoOpt;\r
	PsndRate = currentConfig.s_PsndRate;\r
	PicoRegionOverride = currentConfig.s_PicoRegion;\r
	PicoAutoRgnOrder = currentConfig.s_PicoAutoRgnOrder;\r
}\r
\r
int emu_read_config(const char *rom_fname, int no_defaults)\r
{\r
	char cfg[512];\r
	int ret;\r
\r
	if (!no_defaults)\r
		emu_set_defconfig();\r
\r
	if (rom_fname == NULL)\r
	{\r
		// global config\r
		make_config_cfg(cfg);\r
		ret = config_readsect(cfg, NULL);\r
	}\r
	else\r
	{\r
		char ext[16];\r
		int vol;\r
\r
		if (config_slot != 0)\r
			snprintf(ext, sizeof(ext), ".%i.cfg", config_slot);\r
		else\r
			strcpy(ext, ".cfg");\r
\r
		fname_ext(cfg, sizeof(cfg), "cfg"PATH_SEP, ext, rom_fname);\r
\r
		// read user's config\r
		vol = currentConfig.volume;\r
		ret = config_readsect(cfg, NULL);\r
		currentConfig.volume = vol; // make vol global (bah)\r
\r
		if (ret != 0)\r
		{\r
			// read global config, and apply game_def.cfg on top\r
			make_config_cfg(cfg);\r
			config_readsect(cfg, NULL);\r
\r
			emu_make_path(cfg, "game_def.cfg", sizeof(cfg));\r
			ret = config_readsect(cfg, emu_make_rom_id(rom_fname));\r
		}\r
	}\r
\r
	pemu_validate_config();\r
\r
	// some sanity checks\r
#ifdef PSP\r
	/* TODO: mv to plat_validate_config() */\r
	if (currentConfig.CPUclock < 10 || currentConfig.CPUclock > 4096) currentConfig.CPUclock = 200;\r
	if (currentConfig.gamma < -4 || currentConfig.gamma >  16) currentConfig.gamma = 0;\r
	if (currentConfig.gamma2 < 0 || currentConfig.gamma2 > 2)  currentConfig.gamma2 = 0;\r
#endif\r
	if (currentConfig.volume < 0 || currentConfig.volume > 99)\r
		currentConfig.volume = 50;\r
\r
	if (ret == 0)\r
		config_slot_current = config_slot;\r
\r
	return (ret == 0);\r
}\r
\r
\r
int emu_write_config(int is_game)\r
{\r
	char cfg[512];\r
	int ret, write_lrom = 0;\r
\r
	if (!is_game)\r
	{\r
		make_config_cfg(cfg);\r
		write_lrom = 1;\r
	} else {\r
		char ext[16];\r
\r
		if (config_slot != 0)\r
			snprintf(ext, sizeof(ext), ".%i.cfg", config_slot);\r
		else\r
			strcpy(ext, ".cfg");\r
\r
		romfname_ext(cfg, sizeof(cfg), "cfg"PATH_SEP, ext);\r
	}\r
\r
	lprintf("emu_write_config: %s ", cfg);\r
	ret = config_write(cfg);\r
	if (write_lrom) config_writelrom(cfg);\r
#ifdef __GP2X__\r
	sync();\r
#endif\r
	lprintf((ret == 0) ? "(ok)\n" : "(failed)\n");\r
\r
	if (ret == 0) config_slot_current = config_slot;\r
	return ret == 0;\r
}\r
\r
\r
/* always using built-in font */\r
\r
#define mk_text_out(name, type, val, topleft, step_x, step_y) \\r
void name(int x, int y, const char *text)				\\r
{									\\r
	int i, l, len = strlen(text);					\\r
	type *screen = (type *)(topleft) + x * step_x + y * step_y;	\\r
									\\r
	for (i = 0; i < len; i++, screen += 8 * step_x)			\\r
	{								\\r
		for (l = 0; l < 8; l++)					\\r
		{							\\r
			unsigned char fd = fontdata8x8[text[i] * 8 + l];\\r
			type *s = screen + l * step_y;			\\r
			if (fd&0x80) s[step_x * 0] = val;		\\r
			if (fd&0x40) s[step_x * 1] = val;		\\r
			if (fd&0x20) s[step_x * 2] = val;		\\r
			if (fd&0x10) s[step_x * 3] = val;		\\r
			if (fd&0x08) s[step_x * 4] = val;		\\r
			if (fd&0x04) s[step_x * 5] = val;		\\r
			if (fd&0x02) s[step_x * 6] = val;		\\r
			if (fd&0x01) s[step_x * 7] = val;		\\r
		}							\\r
	}								\\r
}\r
\r
mk_text_out(emu_text_out8,      unsigned char,    0xf0, g_screen_ptr, 1, g_screen_width)\r
mk_text_out(emu_text_out16,     unsigned short, 0xffff, g_screen_ptr, 1, g_screen_width)\r
mk_text_out(emu_text_out8_rot,  unsigned char,    0xf0,\r
	(char *)g_screen_ptr  + (g_screen_width - 1) * g_screen_height, -g_screen_height, 1)\r
mk_text_out(emu_text_out16_rot, unsigned short, 0xffff,\r
	(short *)g_screen_ptr + (g_screen_width - 1) * g_screen_height, -g_screen_height, 1)\r
\r
#undef mk_text_out\r
\r
\r
void update_movie(void)\r
{\r
	int offs = Pico.m.frame_count*3 + 0x40;\r
	if (offs+3 > movie_size) {\r
		free(movie_data);\r
		movie_data = 0;\r
		emu_status_msg("END OF MOVIE.");\r
		lprintf("END OF MOVIE.\n");\r
	} else {\r
		// MXYZ SACB RLDU\r
		PicoPad[0] = ~movie_data[offs]   & 0x8f; // ! SCBA RLDU\r
		if(!(movie_data[offs]   & 0x10)) PicoPad[0] |= 0x40; // C\r
		if(!(movie_data[offs]   & 0x20)) PicoPad[0] |= 0x10; // A\r
		if(!(movie_data[offs]   & 0x40)) PicoPad[0] |= 0x20; // B\r
		PicoPad[1] = ~movie_data[offs+1] & 0x8f; // ! SCBA RLDU\r
		if(!(movie_data[offs+1] & 0x10)) PicoPad[1] |= 0x40; // C\r
		if(!(movie_data[offs+1] & 0x20)) PicoPad[1] |= 0x10; // A\r
		if(!(movie_data[offs+1] & 0x40)) PicoPad[1] |= 0x20; // B\r
		PicoPad[0] |= (~movie_data[offs+2] & 0x0A) << 8; // ! MZYX\r
		if(!(movie_data[offs+2] & 0x01)) PicoPad[0] |= 0x0400; // X\r
		if(!(movie_data[offs+2] & 0x04)) PicoPad[0] |= 0x0100; // Z\r
		PicoPad[1] |= (~movie_data[offs+2] & 0xA0) << 4; // ! MZYX\r
		if(!(movie_data[offs+2] & 0x10)) PicoPad[1] |= 0x0400; // X\r
		if(!(movie_data[offs+2] & 0x40)) PicoPad[1] |= 0x0100; // Z\r
	}\r
}\r
\r
static int try_ropen_file(const char *fname, int *time)\r
{\r
	struct stat st;\r
	FILE *f;\r
\r
	f = fopen(fname, "rb");\r
	if (f) {\r
		if (time != NULL) {\r
			*time = 0;\r
			if (fstat(fileno(f), &st) == 0)\r
				*time = (int)st.st_mtime;\r
		}\r
		fclose(f);\r
		return 1;\r
	}\r
	return 0;\r
}\r
\r
char *emu_get_save_fname(int load, int is_sram, int slot, int *time)\r
{\r
	char *saveFname = static_buff;\r
	char ext[16];\r
\r
	if (is_sram)\r
	{\r
		strcpy(ext, (PicoAHW & PAHW_MCD) ? ".brm" : ".srm");\r
		romfname_ext(saveFname, sizeof(static_buff),\r
			(PicoAHW & PAHW_MCD) ? "brm"PATH_SEP : "srm"PATH_SEP, ext);\r
		if (!load)\r
			return saveFname;\r
\r
		if (try_ropen_file(saveFname, time))\r
			return saveFname;\r
\r
		romfname_ext(saveFname, sizeof(static_buff), NULL, ext);\r
		if (try_ropen_file(saveFname, time))\r
			return saveFname;\r
	}\r
	else\r
	{\r
		const char *ext_main = (currentConfig.EmuOpt & EOPT_GZIP_SAVES) ? ".mds.gz" : ".mds";\r
		const char *ext_othr = (currentConfig.EmuOpt & EOPT_GZIP_SAVES) ? ".mds" : ".mds.gz";\r
		ext[0] = 0;\r
		if (slot > 0 && slot < 10)\r
			sprintf(ext, ".%i", slot);\r
		strcat(ext, ext_main);\r
\r
		if (!load) {\r
			romfname_ext(saveFname, sizeof(static_buff), "mds" PATH_SEP, ext);\r
			return saveFname;\r
		}\r
		else {\r
			romfname_ext(saveFname, sizeof(static_buff), "mds" PATH_SEP, ext);\r
			if (try_ropen_file(saveFname, time))\r
				return saveFname;\r
\r
			romfname_ext(saveFname, sizeof(static_buff), NULL, ext);\r
			if (try_ropen_file(saveFname, time))\r
				return saveFname;\r
\r
			// try the other ext\r
			ext[0] = 0;\r
			if (slot > 0 && slot < 10)\r
				sprintf(ext, ".%i", slot);\r
			strcat(ext, ext_othr);\r
\r
			romfname_ext(saveFname, sizeof(static_buff), "mds"PATH_SEP, ext);\r
			if (try_ropen_file(saveFname, time))\r
				return saveFname;\r
		}\r
	}\r
\r
	return NULL;\r
}\r
\r
int emu_check_save_file(int slot, int *time)\r
{\r
	return emu_get_save_fname(1, 0, slot, time) ? 1 : 0;\r
}\r
\r
int emu_save_load_game(int load, int sram)\r
{\r
	int ret = 0;\r
	char *saveFname;\r
\r
	// make save filename\r
	saveFname = emu_get_save_fname(load, sram, state_slot, NULL);\r
	if (saveFname == NULL) {\r
		if (!sram)\r
			emu_status_msg(load ? "LOAD FAILED (missing file)" : "SAVE FAILED");\r
		return -1;\r
	}\r
\r
	lprintf("saveLoad (%i, %i): %s\n", load, sram, saveFname);\r
\r
	if (sram)\r
	{\r
		FILE *sramFile;\r
		int sram_size;\r
		unsigned char *sram_data;\r
		int truncate = 1;\r
		if (PicoAHW & PAHW_MCD)\r
		{\r
			if (PicoOpt & POPT_EN_MCD_RAMCART) {\r
				sram_size = 0x12000;\r
				sram_data = SRam.data;\r
				if (sram_data)\r
					memcpy32((int *)sram_data, (int *)Pico_mcd->bram, 0x2000/4);\r
			} else {\r
				sram_size = 0x2000;\r
				sram_data = Pico_mcd->bram;\r
				truncate  = 0; // the .brm may contain RAM cart data after normal brm\r
			}\r
		} else {\r
			sram_size = SRam.size;\r
			sram_data = SRam.data;\r
		}\r
		if (sram_data == NULL)\r
			return 0; // SRam forcefully disabled for this game\r
\r
		if (load)\r
		{\r
			sramFile = fopen(saveFname, "rb");\r
			if (!sramFile)\r
				return -1;\r
			ret = fread(sram_data, 1, sram_size, sramFile);\r
			ret = ret > 0 ? 0 : -1;\r
			fclose(sramFile);\r
			if ((PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_RAMCART))\r
				memcpy32((int *)Pico_mcd->bram, (int *)sram_data, 0x2000/4);\r
		} else {\r
			// sram save needs some special processing\r
			// see if we have anything to save\r
			for (; sram_size > 0; sram_size--)\r
				if (sram_data[sram_size-1]) break;\r
\r
			if (sram_size) {\r
				sramFile = fopen(saveFname, truncate ? "wb" : "r+b");\r
				if (!sramFile) sramFile = fopen(saveFname, "wb"); // retry\r
				if (!sramFile) return -1;\r
				ret = fwrite(sram_data, 1, sram_size, sramFile);\r
				ret = (ret != sram_size) ? -1 : 0;\r
				fclose(sramFile);\r
#ifdef __GP2X__\r
				sync();\r
#endif\r
			}\r
		}\r
		return ret;\r
	}\r
	else\r
	{\r
		ret = PicoState(saveFname, !load);\r
		if (!ret) {\r
#ifdef __GP2X__\r
			if (!load) sync();\r
#endif\r
			emu_status_msg(load ? "STATE LOADED" : "STATE SAVED");\r
		} else {\r
			emu_status_msg(load ? "LOAD FAILED" : "SAVE FAILED");\r
			ret = -1;\r
		}\r
\r
		return ret;\r
	}\r
}\r
\r
void emu_set_fastforward(int set_on)\r
{\r
	static void *set_PsndOut = NULL;\r
	static int set_Frameskip, set_EmuOpt, is_on = 0;\r
\r
	if (set_on && !is_on) {\r
		set_PsndOut = PsndOut;\r
		set_Frameskip = currentConfig.Frameskip;\r
		set_EmuOpt = currentConfig.EmuOpt;\r
		PsndOut = NULL;\r
		currentConfig.Frameskip = 8;\r
		currentConfig.EmuOpt &= ~4;\r
		currentConfig.EmuOpt |= 0x40000;\r
		is_on = 1;\r
		emu_status_msg("FAST FORWARD");\r
	}\r
	else if (!set_on && is_on) {\r
		PsndOut = set_PsndOut;\r
		currentConfig.Frameskip = set_Frameskip;\r
		currentConfig.EmuOpt = set_EmuOpt;\r
		PsndRerate(1);\r
		is_on = 0;\r
	}\r
}\r
\r
static void emu_tray_open(void)\r
{\r
	engineState = PGS_TrayMenu;\r
}\r
\r
static void emu_tray_close(void)\r
{\r
	emu_status_msg("CD tray closed.");\r
}\r
\r
void emu_32x_startup(void)\r
{\r
	plat_video_toggle_renderer(0, 0); // HACK\r
	system_announce();\r
}\r
\r
void emu_reset_game(void)\r
{\r
	PicoReset();\r
	reset_timing = 1;\r
}\r
\r
void run_events_pico(unsigned int events)\r
{\r
	int lim_x;\r
\r
	if (events & PEV_PICO_SWINP) {\r
		pico_inp_mode++;\r
		if (pico_inp_mode > 2)\r
			pico_inp_mode = 0;\r
		switch (pico_inp_mode) {\r
			case 2: emu_status_msg("Input: Pen on Pad"); break;\r
			case 1: emu_status_msg("Input: Pen on Storyware"); break;\r
			case 0: emu_status_msg("Input: Joystick");\r
				PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;\r
				break;\r
		}\r
	}\r
	if (events & PEV_PICO_PPREV) {\r
		PicoPicohw.page--;\r
		if (PicoPicohw.page < 0)\r
			PicoPicohw.page = 0;\r
		emu_status_msg("Page %i", PicoPicohw.page);\r
	}\r
	if (events & PEV_PICO_PNEXT) {\r
		PicoPicohw.page++;\r
		if (PicoPicohw.page > 6)\r
			PicoPicohw.page = 6;\r
		emu_status_msg("Page %i", PicoPicohw.page);\r
	}\r
\r
	if (pico_inp_mode == 0)\r
		return;\r
\r
	/* handle other input modes */\r
	if (PicoPad[0] & 1) pico_pen_y--;\r
	if (PicoPad[0] & 2) pico_pen_y++;\r
	if (PicoPad[0] & 4) pico_pen_x--;\r
	if (PicoPad[0] & 8) pico_pen_x++;\r
	PicoPad[0] &= ~0x0f; // release UDLR\r
\r
	lim_x = (Pico.video.reg[12]&1) ? 319 : 255;\r
	if (pico_pen_y < 8)\r
		pico_pen_y = 8;\r
	if (pico_pen_y > 224 - PICO_PEN_ADJUST_Y)\r
		pico_pen_y = 224 - PICO_PEN_ADJUST_Y;\r
	if (pico_pen_x < 0)\r
		pico_pen_x = 0;\r
	if (pico_pen_x > lim_x - PICO_PEN_ADJUST_X)\r
		pico_pen_x = lim_x - PICO_PEN_ADJUST_X;\r
\r
	PicoPicohw.pen_pos[0] = pico_pen_x;\r
	if (!(Pico.video.reg[12] & 1))\r
		PicoPicohw.pen_pos[0] += pico_pen_x / 4;\r
	PicoPicohw.pen_pos[0] += 0x3c;\r
	PicoPicohw.pen_pos[1] = pico_inp_mode == 1 ? (0x2f8 + pico_pen_y) : (0x1fc + pico_pen_y);\r
}\r
\r
static void do_turbo(int *pad, int acts)\r
{\r
	static int turbo_pad = 0;\r
	static unsigned char turbo_cnt[3] = { 0, 0, 0 };\r
	int inc = currentConfig.turbo_rate * 2;\r
\r
	if (acts & 0x1000) {\r
		turbo_cnt[0] += inc;\r
		if (turbo_cnt[0] >= 60)\r
			turbo_pad ^= 0x10, turbo_cnt[0] = 0;\r
	}\r
	if (acts & 0x2000) {\r
		turbo_cnt[1] += inc;\r
		if (turbo_cnt[1] >= 60)\r
			turbo_pad ^= 0x20, turbo_cnt[1] = 0;\r
	}\r
	if (acts & 0x4000) {\r
		turbo_cnt[2] += inc;\r
		if (turbo_cnt[2] >= 60)\r
			turbo_pad ^= 0x40, turbo_cnt[2] = 0;\r
	}\r
	*pad |= turbo_pad & (acts >> 8);\r
}\r
\r
static void run_events_ui(unsigned int which)\r
{\r
	if (which & (PEV_STATE_LOAD|PEV_STATE_SAVE))\r
	{\r
		int do_it = 1;\r
		if ( emu_check_save_file(state_slot, NULL) &&\r
			(((which & PEV_STATE_LOAD) && (currentConfig.confirm_save & EOPT_CONFIRM_LOAD)) ||\r
			 ((which & PEV_STATE_SAVE) && (currentConfig.confirm_save & EOPT_CONFIRM_SAVE))) )\r
		{\r
			const char *nm;\r
			char tmp[64];\r
			int keys, len;\r
\r
			strcpy(tmp, (which & PEV_STATE_LOAD) ? "LOAD STATE?" : "OVERWRITE SAVE?");\r
			len = strlen(tmp);\r
			nm = in_get_key_name(-1, -PBTN_MA3);\r
			snprintf(tmp + len, sizeof(tmp) - len, "(%s=yes, ", nm);\r
			len = strlen(tmp);\r
			nm = in_get_key_name(-1, -PBTN_MBACK);\r
			snprintf(tmp + len, sizeof(tmp) - len, "%s=no)", nm);\r
\r
			plat_status_msg_busy_first(tmp);\r
\r
			in_set_config_int(0, IN_CFG_BLOCKING, 1);\r
			while (in_menu_wait_any(NULL, 50) & (PBTN_MA3|PBTN_MBACK))\r
				;\r
			while ( !((keys = in_menu_wait_any(NULL, 50)) & (PBTN_MA3|PBTN_MBACK)) )\r
				;\r
			if (keys & PBTN_MBACK)\r
				do_it = 0;\r
			while (in_menu_wait_any(NULL, 50) & (PBTN_MA3|PBTN_MBACK))\r
				;\r
			in_set_config_int(0, IN_CFG_BLOCKING, 0);\r
		}\r
		if (do_it) {\r
			plat_status_msg_busy_first((which & PEV_STATE_LOAD) ? "LOADING STATE" : "SAVING STATE");\r
			PicoStateProgressCB = plat_status_msg_busy_next;\r
			emu_save_load_game((which & PEV_STATE_LOAD) ? 1 : 0, 0);\r
			PicoStateProgressCB = NULL;\r
		}\r
	}\r
	if (which & PEV_SWITCH_RND)\r
	{\r
		plat_video_toggle_renderer(1, 0);\r
	}\r
	if (which & (PEV_SSLOT_PREV|PEV_SSLOT_NEXT))\r
	{\r
		if (which & PEV_SSLOT_PREV) {\r
			state_slot -= 1;\r
			if (state_slot < 0)\r
				state_slot = 9;\r
		} else {\r
			state_slot += 1;\r
			if (state_slot > 9)\r
				state_slot = 0;\r
		}\r
\r
		emu_status_msg("SAVE SLOT %i [%s]", state_slot,\r
			emu_check_save_file(state_slot, NULL) ? "USED" : "FREE");\r
	}\r
	if (which & PEV_MENU)\r
		engineState = PGS_Menu;\r
}\r
\r
void emu_update_input(void)\r
{\r
	static int prev_events = 0;\r
	int actions[IN_BINDTYPE_COUNT] = { 0, };\r
	int pl_actions[2];\r
	int events;\r
\r
	in_update(actions);\r
\r
	pl_actions[0] = actions[IN_BINDTYPE_PLAYER12];\r
	pl_actions[1] = actions[IN_BINDTYPE_PLAYER12] >> 16;\r
\r
	PicoPad[0] = pl_actions[0] & 0xfff;\r
	PicoPad[1] = pl_actions[1] & 0xfff;\r
\r
	if (pl_actions[0] & 0x7000)\r
		do_turbo(&PicoPad[0], pl_actions[0]);\r
	if (pl_actions[1] & 0x7000)\r
		do_turbo(&PicoPad[1], pl_actions[1]);\r
\r
	events = actions[IN_BINDTYPE_EMU] & PEV_MASK;\r
\r
	// volume is treated in special way and triggered every frame\r
	if (events & (PEV_VOL_DOWN|PEV_VOL_UP))\r
		plat_update_volume(1, events & PEV_VOL_UP);\r
\r
	if ((events ^ prev_events) & PEV_FF) {\r
		emu_set_fastforward(events & PEV_FF);\r
		plat_update_volume(0, 0);\r
		reset_timing = 1;\r
	}\r
\r
	events &= ~prev_events;\r
\r
	if (PicoAHW == PAHW_PICO)\r
		run_events_pico(events);\r
	if (events)\r
		run_events_ui(events);\r
	if (movie_data)\r
		update_movie();\r
\r
	prev_events = actions[IN_BINDTYPE_EMU] & PEV_MASK;\r
}\r
\r
static void mkdir_path(char *path_with_reserve, int pos, const char *name)\r
{\r
	strcpy(path_with_reserve + pos, name);\r
	if (plat_is_dir(path_with_reserve))\r
		return;\r
	if (mkdir(path_with_reserve, 0777) < 0)\r
		lprintf("failed to create: %s\n", path_with_reserve);\r
}\r
\r
void emu_cmn_forced_frame(int no_scale, int do_emu)\r
{\r
	int po_old = PicoOpt;\r
\r
	memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\r
\r
	PicoOpt &= ~POPT_ALT_RENDERER;\r
	PicoOpt |= POPT_ACC_SPRITES;\r
	if (!no_scale)\r
		PicoOpt |= POPT_EN_SOFTSCALE;\r
\r
	PicoDrawSetOutFormat(PDF_RGB555, 1);\r
	Pico.m.dirtyPal = 1;\r
	if (do_emu)\r
		PicoFrame();\r
	else\r
		PicoFrameDrawOnly();\r
\r
	PicoOpt = po_old;\r
}\r
\r
void emu_init(void)\r
{\r
	char path[512];\r
	int pos;\r
\r
#if 0\r
	// FIXME: handle through menu, etc\r
	FILE *f;\r
	f = fopen("32X_M_BIOS.BIN", "rb");\r
	p32x_bios_m = malloc(2048);\r
	fread(p32x_bios_m, 1, 2048, f);\r
	fclose(f);\r
	f = fopen("32X_S_BIOS.BIN", "rb");\r
	p32x_bios_s = malloc(1024);\r
	fread(p32x_bios_s, 1, 1024, f);\r
	fclose(f);\r
#endif\r
\r
	/* make dirs for saves */\r
	pos = plat_get_root_dir(path, sizeof(path) - 4);\r
	mkdir_path(path, pos, "mds");\r
	mkdir_path(path, pos, "srm");\r
	mkdir_path(path, pos, "brm");\r
	mkdir_path(path, pos, "cfg");\r
\r
	pprof_init();\r
\r
	make_config_cfg(path);\r
	config_readlrom(path);\r
\r
	PicoInit();\r
	PicoMessage = plat_status_msg_busy_next;\r
	PicoMCDopenTray = emu_tray_open;\r
	PicoMCDcloseTray = emu_tray_close;\r
\r
	sndout_init();\r
}\r
\r
void emu_finish(void)\r
{\r
	// save SRAM\r
	if ((currentConfig.EmuOpt & EOPT_EN_SRAM) && SRam.changed) {\r
		emu_save_load_game(0, 1);\r
		SRam.changed = 0;\r
	}\r
\r
	if (!(currentConfig.EmuOpt & EOPT_NO_AUTOSVCFG)) {\r
		char cfg[512];\r
		make_config_cfg(cfg);\r
		config_writelrom(cfg);\r
#ifdef __GP2X__\r
		sync();\r
#endif\r
	}\r
\r
	pprof_finish();\r
\r
	PicoExit();\r
	sndout_exit();\r
}\r
\r
static void snd_write_nonblocking(int len)\r
{\r
	sndout_write_nb(PsndOut, len);\r
}\r
\r
void emu_sound_start(void)\r
{\r
	PsndOut = NULL;\r
\r
	if (currentConfig.EmuOpt & EOPT_EN_SOUND)\r
	{\r
		int is_stereo = (PicoOpt & POPT_EN_STEREO) ? 1 : 0;\r
\r
		PsndRerate(Pico.m.frame_count ? 1 : 0);\r
\r
		printf("starting audio: %i len: %i stereo: %i, pal: %i\n",\r
			PsndRate, PsndLen, is_stereo, Pico.m.pal);\r
		sndout_start(PsndRate, is_stereo);\r
		PicoWriteSound = snd_write_nonblocking;\r
		plat_update_volume(0, 0);\r
		memset(sndBuffer, 0, sizeof(sndBuffer));\r
		PsndOut = sndBuffer;\r
	}\r
}\r
\r
void emu_sound_stop(void)\r
{\r
	sndout_stop();\r
}\r
\r
void emu_sound_wait(void)\r
{\r
	sndout_wait();\r
}\r
\r
static void emu_loop_prep(void)\r
{\r
	static int pal_old = -1;\r
	static int filter_old = -1;\r
\r
	if (currentConfig.CPUclock != plat_target_cpu_clock_get())\r
		plat_target_cpu_clock_set(currentConfig.CPUclock);\r
\r
	if (Pico.m.pal != pal_old) {\r
		plat_target_lcdrate_set(Pico.m.pal);\r
		pal_old = Pico.m.pal;\r
	}\r
\r
	if (currentConfig.filter != filter_old) {\r
		plat_target_hwfilter_set(currentConfig.filter);\r
		filter_old = currentConfig.filter;\r
	}\r
\r
	plat_target_gamma_set(currentConfig.gamma, 0);\r
\r
	pemu_loop_prep();\r
}\r
\r
/* our tick here is 1 us right now */\r
#define ms_to_ticks(x) (unsigned int)(x * 1000)\r
#define get_ticks() plat_get_ticks_us()\r
\r
void emu_loop(void)\r
{\r
	int frames_done, frames_shown;	/* actual frames for fps counter */\r
	int target_frametime_x3;\r
	unsigned int timestamp_x3 = 0;\r
	unsigned int timestamp_aim_x3 = 0;\r
	unsigned int timestamp_fps_x3 = 0;\r
	char *notice_msg = NULL;\r
	char fpsbuff[24];\r
	int fskip_cnt = 0;\r
\r
	fpsbuff[0] = 0;\r
\r
	PicoLoopPrepare();\r
\r
	plat_video_loop_prepare();\r
	emu_loop_prep();\r
	pemu_sound_start();\r
\r
	/* number of ticks per frame */\r
	if (Pico.m.pal)\r
		target_frametime_x3 = 3 * ms_to_ticks(1000) / 50;\r
	else\r
		target_frametime_x3 = 3 * ms_to_ticks(1000) / 60;\r
\r
	reset_timing = 1;\r
	frames_done = frames_shown = 0;\r
\r
	/* loop with resync every 1 sec. */\r
	while (engineState == PGS_Running)\r
	{\r
		int skip = 0;\r
		int diff;\r
\r
		pprof_start(main);\r
\r
		if (reset_timing) {\r
			reset_timing = 0;\r
			plat_video_wait_vsync();\r
			timestamp_aim_x3 = get_ticks() * 3;\r
			timestamp_fps_x3 = timestamp_aim_x3;\r
			fskip_cnt = 0;\r
		}\r
		else if (currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) {\r
			timestamp_aim_x3 = get_ticks() * 3;\r
		}\r
\r
		timestamp_x3 = get_ticks() * 3;\r
\r
		// show notice_msg message?\r
		if (notice_msg_time != 0)\r
		{\r
			static int noticeMsgSum;\r
			if (timestamp_x3 - ms_to_ticks(notice_msg_time) * 3\r
			     > ms_to_ticks(STATUS_MSG_TIMEOUT) * 3)\r
			{\r
				notice_msg_time = 0;\r
				plat_status_msg_clear();\r
				plat_video_flip();\r
				plat_status_msg_clear(); /* Do it again in case of double buffering */\r
				notice_msg = NULL;\r
			}\r
			else {\r
				int sum = noticeMsg[0] + noticeMsg[1] + noticeMsg[2];\r
				if (sum != noticeMsgSum) {\r
					plat_status_msg_clear();\r
					noticeMsgSum = sum;\r
				}\r
				notice_msg = noticeMsg;\r
			}\r
		}\r
\r
		// second changed?\r
		if (timestamp_x3 - timestamp_fps_x3 >= ms_to_ticks(1000) * 3)\r
		{\r
#ifdef BENCHMARK\r
			static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
			if (++bench == 10) {\r
				bench = 0;\r
				bench_fps_s = bench_fps;\r
				bf[bfp++ & 3] = bench_fps;\r
				bench_fps = 0;\r
			}\r
			bench_fps += frames_shown;\r
			sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
			printf("%s\n", fpsbuff);\r
#else\r
			if (currentConfig.EmuOpt & EOPT_SHOW_FPS)\r
				sprintf(fpsbuff, "%02i/%02i  ", frames_shown, frames_done);\r
#endif\r
			frames_shown = frames_done = 0;\r
			timestamp_fps_x3 += ms_to_ticks(1000) * 3;\r
		}\r
#ifdef PFRAMES\r
		sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
#endif\r
\r
		diff = timestamp_aim_x3 - timestamp_x3;\r
\r
		if (currentConfig.Frameskip >= 0) // frameskip enabled (or 0)\r
		{\r
			if (fskip_cnt < currentConfig.Frameskip) {\r
				fskip_cnt++;\r
				skip = 1;\r
			}\r
			else {\r
				fskip_cnt = 0;\r
			}\r
		}\r
		else if (diff < -target_frametime_x3)\r
		{\r
			/* no time left for this frame - skip */\r
			/* limit auto frameskip to 8 */\r
			if (frames_done / 8 <= frames_shown)\r
				skip = 1;\r
		}\r
\r
		// don't go in debt too much\r
		while (diff < -target_frametime_x3 * 3) {\r
			timestamp_aim_x3 += target_frametime_x3;\r
			diff = timestamp_aim_x3 - timestamp_x3;\r
		}\r
\r
		emu_update_input();\r
		if (skip) {\r
			int do_audio = diff > -target_frametime_x3 * 2;\r
			PicoSkipFrame = do_audio ? 1 : 2;\r
			PicoFrame();\r
			PicoSkipFrame = 0;\r
		}\r
		else {\r
			PicoFrame();\r
			pemu_finalize_frame(fpsbuff, notice_msg);\r
			frames_shown++;\r
		}\r
		frames_done++;\r
		timestamp_aim_x3 += target_frametime_x3;\r
\r
		if (!skip && !flip_after_sync)\r
			plat_video_flip();\r
\r
		/* frame limiter */\r
		if (!skip && !reset_timing\r
		    && !(currentConfig.EmuOpt & (EOPT_NO_FRMLIMIT|EOPT_EXT_FRMLIMIT)))\r
		{\r
			unsigned int timestamp = get_ticks();\r
			diff = timestamp_aim_x3 - timestamp * 3;\r
\r
			// sleep or vsync if we are still too fast\r
			if (diff > target_frametime_x3 && (currentConfig.EmuOpt & EOPT_VSYNC)) {\r
				// we are too fast\r
				plat_video_wait_vsync();\r
				timestamp = get_ticks();\r
				diff = timestamp * 3 - timestamp_aim_x3;\r
			}\r
			if (diff > target_frametime_x3) {\r
				// still too fast\r
				plat_wait_till_us(timestamp + (diff - target_frametime_x3) / 3);\r
			}\r
		}\r
\r
		if (!skip && flip_after_sync)\r
			plat_video_flip();\r
\r
		pprof_end(main);\r
	}\r
\r
	emu_set_fastforward(0);\r
\r
	// save SRAM\r
	if ((currentConfig.EmuOpt & EOPT_EN_SRAM) && SRam.changed) {\r
		plat_status_msg_busy_first("Writing SRAM/BRAM...");\r
		emu_save_load_game(0, 1);\r
		SRam.changed = 0;\r
	}\r
\r
	pemu_loop_end();\r
	emu_sound_stop();\r
}\r