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

// (c) Copyright 2006-2009 notaz, All rights reserved.\r
// Free for non-commercial use.\r
\r
// For commercial use, separate licencing terms must be obtained.\r
\r
#include <stdio.h>\r
#include <stdlib.h>\r
#include <stdarg.h>\r
#ifndef NO_SYNC\r
#include <unistd.h>\r
#endif\r
\r
#include "emu.h"\r
#include "menu.h"\r
#include "fonts.h"\r
#include "lprintf.h"\r
#include "config.h"\r
#include "plat.h"\r
#include "input.h"\r
#include "posix.h"\r
\r
#include <pico/pico_int.h>\r
#include <pico/patch.h>\r
#include <pico/cd/cue.h>\r
\r
\r
#define STATUS_MSG_TIMEOUT 2000\r
\r
void *g_screen_ptr;\r
\r
#if !SCREEN_SIZE_FIXED\r
int g_screen_width  = SCREEN_WIDTH;\r
int g_screen_height = SCREEN_HEIGHT;\r
#endif\r
\r
char *PicoConfigFile = "config.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 = 0;\r
int engineState = PGS_Menu;\r
\r
/* TODO: len checking */\r
char rom_fname_reload[512] = { 0, };\r
char rom_fname_loaded[512] = { 0, };\r
int rom_loaded = 0;\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
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[] = { "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303" };\r
static const char * const biosfiles_eu[] = { "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303"   };\r
static const char * const biosfiles_jp[] = { "jp_mcd1_9112", "jp_mcd1_9111" };\r
\r
static int find_bios(int region, char **bios_file)\r
{\r
	static char bios_path[1024];\r
	int i, count;\r
	const char * const *files;\r
	FILE *f = NULL;\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(bios_path, files[i], sizeof(bios_path) - 4);\r
		strcat(bios_path, ".bin");\r
		f = fopen(bios_path, "rb");\r
		if (f) break;\r
\r
		bios_path[strlen(bios_path) - 4] = 0;\r
		strcat(bios_path, ".zip");\r
		f = fopen(bios_path, "rb");\r
		if (f) break;\r
	}\r
\r
	if (f) {\r
		lprintf("using bios: %s\n", bios_path);\r
		fclose(f);\r
		if (bios_file) *bios_file = bios_path;\r
		return 1;\r
	} else {\r
		sprintf(bios_path, "no %s BIOS files found, read docs",\r
			region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");\r
		me_update_msg(bios_path);\r
		return 0;\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 unsigned char id_header[0x100];\r
\r
/* checks if fname points to valid MegaCD image */\r
static int emu_cd_check(int *pregion, const char *fname_in)\r
{\r
	const char *fname = fname_in;\r
	unsigned char buf[32];\r
	pm_file *cd_f;\r
	int region = 4; // 1: Japan, 4: US, 8: Europe\r
	char ext[5];\r
	cue_track_type type = CT_UNKNOWN;\r
	cue_data_t *cue_data = NULL;\r
\r
	get_ext(fname_in, ext);\r
	if (strcasecmp(ext, ".cue") == 0) {\r
		cue_data = cue_parse(fname_in);\r
		if (cue_data != NULL) {\r
			fname = cue_data->tracks[1].fname;\r
			type  = cue_data->tracks[1].type;\r
		}\r
		else\r
			return -1;\r
	}\r
\r
	cd_f = pm_open(fname);\r
	if (cue_data != NULL)\r
		cue_destroy(cue_data);\r
\r
	if (cd_f == NULL) return 0; // let the upper level handle this\r
\r
	if (pm_read(buf, 32, cd_f) != 32) {\r
		pm_close(cd_f);\r
		return -1;\r
	}\r
\r
	if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x00, 14)) {\r
		if (type && type != CT_ISO)\r
			elprintf(EL_STATUS, ".cue has wrong type: %i", type);\r
		type = CT_ISO;       // Sega CD (ISO)\r
	}\r
	if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x10, 14)) {\r
		if (type && type != CT_BIN)\r
			elprintf(EL_STATUS, ".cue has wrong type: %i", type);\r
		type = CT_BIN;       // Sega CD (BIN)\r
	}\r
\r
	if (type == CT_UNKNOWN) {\r
		pm_close(cd_f);\r
		return 0;\r
	}\r
\r
	pm_seek(cd_f, (type == CT_ISO) ? 0x100 : 0x110, SEEK_SET);\r
	pm_read(id_header, sizeof(id_header), cd_f);\r
\r
	/* it seems we have a CD image here. Try to detect region now.. */\r
	pm_seek(cd_f, (type == CT_ISO) ? 0x100+0x10B : 0x110+0x10B, SEEK_SET);\r
	pm_read(buf, 1, cd_f);\r
	pm_close(cd_f);\r
\r
	if (buf[0] == 0x64) region = 8; // EU\r
	if (buf[0] == 0xa1) region = 1; // JAP\r
\r
	lprintf("detected %s Sega/Mega CD image with %s region\n",\r
		type == CT_BIN ? "BIN" : "ISO", region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");\r
\r
	if (pregion != NULL) *pregion = region;\r
\r
	return type;\r
}\r
\r
static int detect_media(const char *fname)\r
{\r
	static const short sms_offsets[] = { 0x7ff0, 0x3ff0, 0x1ff0 };\r
	static const char *sms_exts[] = { "sms", "gg", "sg" };\r
	static const char *md_exts[] = { "gen", "bin", "smd" };\r
	char buff0[32], buff[32];\r
	unsigned short *d16;\r
	pm_file *pmf;\r
	char ext[5];\r
	int i;\r
\r
	get_ext(fname, ext);\r
\r
	// detect wrong extensions\r
	if (!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) // s.gz ~ .mds.gz\r
		return PM_BAD;\r
\r
	/* don't believe in extensions, except .cue */\r
	if (strcasecmp(ext, ".cue") == 0)\r
		return PM_CD;\r
\r
	pmf = pm_open(fname);\r
	if (pmf == NULL)\r
		return PM_BAD;\r
\r
	if (pm_read(buff0, 32, pmf) != 32) {\r
		pm_close(pmf);\r
		return PM_BAD;\r
	}\r
\r
	if (strncasecmp("SEGADISCSYSTEM", buff0 + 0x00, 14) == 0 ||\r
	    strncasecmp("SEGADISCSYSTEM", buff0 + 0x10, 14) == 0) {\r
		pm_close(pmf);\r
		return PM_CD;\r
	}\r
\r
	/* check for SMD evil */\r
	if (pmf->size >= 0x4200 && (pmf->size & 0x3fff) == 0x200) {\r
		if (pm_seek(pmf, sms_offsets[0] + 0x200, SEEK_SET) == sms_offsets[0] + 0x200 &&\r
		    pm_read(buff, 16, pmf) == 16 &&\r
		    strncmp("TMR SEGA", buff, 8) == 0)\r
			goto looks_like_sms;\r
\r
		/* could parse further but don't bother */\r
		goto extension_check;\r
	}\r
\r
	/* MD header? Act as TMSS BIOS here */\r
	if (pm_seek(pmf, 0x100, SEEK_SET) == 0x100 && pm_read(buff, 16, pmf) == 16) {\r
		if (strncmp(buff, "SEGA", 4) == 0 || strncmp(buff, " SEG", 4) == 0)\r
			goto looks_like_md;\r
	}\r
\r
	for (i = 0; i < array_size(sms_offsets); i++) {\r
		if (pm_seek(pmf, sms_offsets[i], SEEK_SET) != sms_offsets[i])\r
			continue;\r
\r
		if (pm_read(buff, 16, pmf) != 16)\r
			continue;\r
\r
		if (strncmp("TMR SEGA", buff, 8) == 0)\r
			goto looks_like_sms;\r
	}\r
\r
extension_check:\r
	/* probably some headerless thing. Maybe check the extension after all. */\r
	for (i = 0; i < array_size(md_exts); i++)\r
		if (strcasecmp(pmf->ext, md_exts[i]) == 0)\r
			goto looks_like_md;\r
\r
	for (i = 0; i < array_size(sms_exts); i++)\r
		if (strcasecmp(pmf->ext, sms_exts[i]) == 0)\r
			goto looks_like_sms;\r
\r
	/* If everything else fails, make a guess on the reset vector */\r
	d16 = (unsigned short *)(buff0 + 4);\r
	if ((((d16[0] << 16) | d16[1]) & 0xffffff) >= pmf->size) {\r
		lprintf("bad MD reset vector, assuming SMS\n");\r
		goto looks_like_sms;\r
	}\r
\r
looks_like_md:\r
	pm_close(pmf);\r
	return PM_MD_CART;\r
\r
looks_like_sms:\r
	pm_close(pmf);\r
	return PM_MARK3;\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(void)\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 strcpy(id_string, "MD|");\r
	pos = 3;\r
\r
	pos += extract_text(id_string + pos, id_header + 0x80, 0x0e, swab); // serial\r
	id_string[pos] = '|'; pos++;\r
	pos += extract_text(id_string + pos, id_header + 0xf0, 0x03, swab); // region\r
	id_string[pos] = '|'; pos++;\r
	pos += extract_text(id_string + pos, id_header + 0x50, 0x30, swab); // overseas name\r
	id_string[pos] = 0;\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, 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 shutdown_MCD(void)\r
{\r
	if ((PicoAHW & PAHW_MCD) && Pico_mcd != NULL)\r
		Stop_CD();\r
	PicoAHW &= ~PAHW_MCD;\r
}\r
\r
// note: this function might mangle rom_fname\r
// XXX: portions of this code should move to pico/\r
int emu_reload_rom(char *rom_fname)\r
{\r
	unsigned int rom_size = 0;\r
	char *used_rom_name = rom_fname;\r
	unsigned char *rom_data = NULL;\r
	char ext[5];\r
	pm_file *rom = NULL;\r
	int cd_state = CIT_NOT_CD;\r
	int ret, media_type, cd_region;\r
	int cfg_loaded = 0, bad_rom = 0;\r
\r
	lprintf("emu_ReloadRom(%s)\n", rom_fname);\r
\r
	get_ext(rom_fname, ext);\r
\r
	// check for movie file\r
	if (movie_data) {\r
		free(movie_data);\r
		movie_data = 0;\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
			me_update_msg("Failed to open movie.");\r
			return 0;\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
			me_update_msg("Invalid GMV file.");\r
			fclose(movie_file);\r
			return 0;\r
		}\r
		movie_data = malloc(movie_size);\r
		if(movie_data == NULL) {\r
			me_update_msg("low memory.");\r
			fclose(movie_file);\r
			return 0;\r
		}\r
		fread(movie_data, 1, movie_size, movie_file);\r
		fclose(movie_file);\r
		if (strncmp((char *)movie_data, "Gens Movie TEST", 15) != 0) {\r
			me_update_msg("Invalid GMV file.");\r
			return 0;\r
		}\r
		dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);\r
		if (!dummy) {\r
			me_update_msg("Could't find a ROM for movie.");\r
			return 0;\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
			me_update_msg("Could't find a ROM to patch.");\r
			return 0;\r
		}\r
		get_ext(rom_fname, ext);\r
	}\r
\r
	media_type = detect_media(rom_fname);\r
	if (media_type == PM_BAD) {\r
		me_update_msg("Not a ROM/CD img selected.");\r
		return 0;\r
	}\r
\r
	shutdown_MCD();\r
	PicoPatchUnload();\r
	PicoAHW = 0;\r
\r
	if (media_type == PM_CD)\r
	{\r
		// check for MegaCD image\r
		cd_state = emu_cd_check(&cd_region, rom_fname);\r
		if (cd_state >= 0 && cd_state != CIT_NOT_CD)\r
		{\r
			// valid CD image, check for BIOS..\r
\r
			// we need to have config loaded at this point\r
			ret = emu_read_config(1, 0);\r
			if (!ret) emu_read_config(0, 0);\r
			cfg_loaded = 1;\r
\r
			if (PicoRegionOverride) {\r
				cd_region = PicoRegionOverride;\r
				lprintf("override region to %s\n", cd_region != 4 ?\r
					(cd_region == 8 ? "EU" : "JAP") : "USA");\r
			}\r
			if (!find_bios(cd_region, &used_rom_name))\r
				return 0;\r
\r
			get_ext(used_rom_name, ext);\r
			PicoAHW |= PAHW_MCD;\r
		}\r
		else {\r
			me_update_msg("Invalid CD image");\r
			return 0;\r
		}\r
	}\r
	else if (media_type == PM_MARK3) {\r
		lprintf("detected SMS ROM\n");\r
		PicoAHW = PAHW_SMS;\r
	}\r
\r
	rom = pm_open(used_rom_name);\r
	if (rom == NULL) {\r
		me_update_msg("Failed to open ROM");\r
		return 0;\r
	}\r
\r
	menu_romload_prepare(used_rom_name); // also CD load\r
\r
	PicoCartUnload();\r
	rom_loaded = 0;\r
\r
	ret = PicoCartLoad(rom, &rom_data, &rom_size, (PicoAHW & PAHW_SMS) ? 1 : 0);\r
	pm_close(rom);\r
	if (ret != 0) {\r
		if      (ret == 2) me_update_msg("Out of memory");\r
		else if (ret == 3) me_update_msg("Read failed");\r
		else               me_update_msg("PicoCartLoad() failed.");\r
		goto fail;\r
	}\r
\r
	// detect wrong files\r
	if (strncmp((char *)rom_data, "Pico", 4) == 0)\r
		bad_rom = 1;\r
	else if (!(PicoAHW & PAHW_SMS)) {\r
		unsigned short *d = (unsigned short *)(rom_data + 4);\r
		if ((((d[0] << 16) | d[1]) & 0xffffff) >= (int)rom_size) {\r
			lprintf("bad reset vector\n");\r
			bad_rom = 1;\r
		}\r
	}\r
\r
	if (bad_rom) {\r
		me_update_msg("Bad ROM detected.");\r
		goto fail;\r
	}\r
\r
	// load config for this ROM (do this before insert to get correct region)\r
	if (!(PicoAHW & PAHW_MCD))\r
		memcpy(id_header, rom_data + 0x100, sizeof(id_header));\r
	if (!cfg_loaded) {\r
		ret = emu_read_config(1, 0);\r
		if (!ret) emu_read_config(0, 0);\r
	}\r
\r
	if (PicoCartInsert(rom_data, rom_size)) {\r
		me_update_msg("Failed to load ROM.");\r
		goto fail;\r
	}\r
\r
	// insert CD if it was detected\r
	if (cd_state != CIT_NOT_CD) {\r
		ret = Insert_CD(rom_fname, cd_state);\r
		if (ret != 0) {\r
			PicoCartUnload();\r
			rom_data = NULL; // freed by unload\r
			me_update_msg("Insert_CD() failed, invalid CD image?");\r
			goto fail;\r
		}\r
	}\r
\r
	menu_romload_end();\r
\r
	if (PicoPatches) {\r
		PicoPatchPrepare();\r
		PicoPatchApply();\r
	}\r
\r
	// additional movie stuff\r
	if (movie_data)\r
	{\r
		if (movie_data[0x14] == '6')\r
		     PicoOpt |=  POPT_6BTN_PAD; // 6 button pad\r
		else PicoOpt &= ~POPT_6BTN_PAD;\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
		const char *sys_name, *tv_standard;\r
		int fps;\r
\r
		if (PicoAHW & PAHW_SMS) {\r
			sys_name = "Master System";\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", tv_standard, sys_name, fps);\r
\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
	rom_loaded = 1;\r
\r
	// load SRAM for this ROM\r
	if (currentConfig.EmuOpt & EOPT_EN_SRAM)\r
		emu_save_load_game(1, 1);\r
\r
	return 1;\r
\r
fail:\r
	if (rom_data)\r
		free(rom_data);\r
	menu_romload_end();\r
	return 0;\r
}\r
\r
int emu_swap_cd(const char *fname)\r
{\r
	cd_img_type cd_type;\r
	int ret = -1;\r
\r
	cd_type = emu_cd_check(NULL, fname);\r
	if (cd_type != CIT_NOT_CD)\r
		ret = Insert_CD(fname, cd_type);\r
	if (ret != 0) {\r
		me_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
	return 1;\r
}\r
\r
static void romfname_ext(char *dst, const char *prefix, const char *ext)\r
{\r
	char *p;\r
	int prefix_len = 0;\r
\r
	// make save filename\r
	p = rom_fname_loaded + strlen(rom_fname_loaded) - 1;\r
	for (; p >= rom_fname_loaded && *p != PATH_SEP_C; p--); p++;\r
	*dst = 0;\r
	if (prefix) {\r
		int len = plat_get_root_dir(dst, 512);\r
		strcpy(dst + len, prefix);\r
		prefix_len = len + strlen(prefix);\r
	}\r
#ifdef UIQ3\r
	else p = rom_fname_loaded; // backward compatibility\r
#endif\r
	strncpy(dst + prefix_len, p, 511-prefix_len);\r
	dst[511-8] = 0;\r
	if (dst[strlen(dst)-4] == '.') dst[strlen(dst)-4] = 0;\r
	if (ext) strcat(dst, ext);\r
}\r
\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_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
	PicoCDBuffers = currentConfig.s_PicoCDBuffers;\r
}\r
\r
int emu_read_config(int game, int no_defaults)\r
{\r
	char cfg[512];\r
	int ret;\r
\r
	if (!no_defaults)\r
		emu_set_defconfig();\r
\r
	if (!game)\r
	{\r
		make_config_cfg(cfg);\r
		ret = config_readsect(cfg, NULL);\r
	}\r
	else\r
	{\r
		char *sect = emu_make_rom_id();\r
\r
		// try new .cfg way\r
		if (config_slot != 0)\r
		     sprintf(cfg, "game.%i.cfg", config_slot);\r
		else strcpy(cfg,  "game.cfg");\r
\r
		ret = -1;\r
		if (config_havesect(cfg, sect))\r
		{\r
			// read user's config\r
			int vol = currentConfig.volume;\r
			emu_set_defconfig();\r
			ret = config_readsect(cfg, sect);\r
			currentConfig.volume = vol; // make vol global (bah)\r
		}\r
		else\r
		{\r
			// read global config, and apply game_def.cfg on top\r
			make_config_cfg(cfg);\r
			config_readsect(cfg, NULL);\r
			emu_make_path(cfg, "game_def.cfg", sizeof(cfg));\r
			ret = config_readsect(cfg, sect);\r
		}\r
\r
		if (ret == 0)\r
		{\r
			lprintf("loaded cfg from sect \"%s\"\n", sect);\r
		}\r
	}\r
\r
	plat_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], *game_sect = NULL;\r
	int ret, write_lrom = 0;\r
\r
	if (!is_game)\r
	{\r
		make_config_cfg(cfg);\r
		write_lrom = 1;\r
	} else {\r
		if (config_slot != 0)\r
		     sprintf(cfg, "game.%i.cfg", config_slot);\r
		else strcpy(cfg,  "game.cfg");\r
		game_sect = emu_make_rom_id();\r
		lprintf("emu_write_config: sect \"%s\"\n", game_sect);\r
	}\r
\r
	lprintf("emu_write_config: %s ", cfg);\r
	ret = config_writesect(cfg, game_sect);\r
	if (write_lrom) config_writelrom(cfg);\r
#ifndef NO_SYNC\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)\r
{\r
	FILE *f;\r
\r
	f = fopen(fname, "rb");\r
	if (f) {\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)\r
{\r
	static char saveFname[512];\r
	char ext[16];\r
\r
	if (is_sram)\r
	{\r
		strcpy(ext, (PicoAHW & PAHW_MCD) ? ".brm" : ".srm");\r
		romfname_ext(saveFname, (PicoAHW & PAHW_MCD) ? "brm"PATH_SEP : "srm"PATH_SEP, ext);\r
		if (!load)\r
			return saveFname;\r
\r
		if (try_ropen_file(saveFname))\r
			return saveFname;\r
\r
		romfname_ext(saveFname, NULL, ext);\r
		if (try_ropen_file(saveFname))\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, "mds" PATH_SEP, ext);\r
			return saveFname;\r
		}\r
		else {\r
			romfname_ext(saveFname, "mds" PATH_SEP, ext);\r
			if (try_ropen_file(saveFname))\r
				return saveFname;\r
\r
			romfname_ext(saveFname, NULL, ext);\r
			if (try_ropen_file(saveFname))\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, "mds"PATH_SEP, ext);\r
			if (try_ropen_file(saveFname))\r
				return saveFname;\r
		}\r
	}\r
\r
	return NULL;\r
}\r
\r
int emu_check_save_file(int slot)\r
{\r
	return emu_get_save_fname(1, 0, slot) ? 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);\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) return 0; // SRam forcefully disabled for this game\r
\r
		if (load)\r
		{\r
			sramFile = fopen(saveFname, "rb");\r
			if(!sramFile) return -1;\r
			fread(sram_data, 1, sram_size, sramFile);\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
#ifndef NO_SYNC\r
				sync();\r
#endif\r
			}\r
		}\r
		return ret;\r
	}\r
	else\r
	{\r
		ret = PicoState(saveFname, !load);\r
		if (!ret) {\r
#ifndef NO_SYNC\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_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) &&\r
				(((which & PEV_STATE_LOAD) && (currentConfig.EmuOpt & EOPT_CONFIRM_LOAD)) ||\r
				 ((which & PEV_STATE_SAVE) && (currentConfig.EmuOpt & 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_blocking(1);\r
			while (in_menu_wait_any(50) & (PBTN_MA3|PBTN_MBACK))\r
				;\r
			while ( !((keys = in_menu_wait_any(50)) & (PBTN_MA3|PBTN_MBACK)) )\r
				;\r
			if (keys & PBTN_MBACK)\r
				do_it = 0;\r
			while (in_menu_wait_any(50) & (PBTN_MA3|PBTN_MBACK))\r
				;\r
			in_set_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) ? "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_init(void)\r
{\r
	char path[512];\r
	int pos;\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
\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
\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
#ifndef NO_SYNC\r
		sync();\r
#endif\r
	}\r
\r
	PicoExit();\r
}\r
\r
static void skip_frame(int do_audio)\r
{\r
	PicoSkipFrame = do_audio ? 1 : 2;\r
	PicoFrame();\r
	PicoSkipFrame = 0;\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 pframes_done;		/* "period" frames, used for sync */\r
	int frames_done, frames_shown;	/* actual frames for fps counter */\r
	int target_fps, target_frametime;\r
	unsigned int timestamp_base = 0, timestamp_fps;\r
	char *notice_msg = NULL;\r
	char fpsbuff[24];\r
	int i;\r
\r
	fpsbuff[0] = 0;\r
\r
	/* make sure we are in correct mode */\r
	Pico.m.dirtyPal = 1;\r
	rendstatus_old = -1;\r
\r
	/* number of ticks per frame */\r
	if (Pico.m.pal) {\r
		target_fps = 50;\r
		target_frametime = ms_to_ticks(1000) / 50;\r
	} else {\r
		target_fps = 60;\r
		target_frametime = ms_to_ticks(1000) / 60 + 1;\r
	}\r
\r
	// prepare CD buffer\r
	if (PicoAHW & PAHW_MCD)\r
		PicoCDBufferInit();\r
\r
	pemu_loop_prep();\r
\r
	timestamp_fps = get_ticks();\r
	reset_timing = 1;\r
\r
	frames_done = frames_shown = pframes_done = 0;\r
\r
	plat_video_wait_vsync();\r
\r
	/* loop with resync every 1 sec. */\r
	while (engineState == PGS_Running)\r
	{\r
		unsigned int timestamp;\r
		int diff, diff_lim;\r
\r
		timestamp = get_ticks();\r
		if (reset_timing) {\r
			reset_timing = 0;\r
			timestamp_base = timestamp;\r
			pframes_done = 0;\r
		}\r
\r
		// show notice_msg message?\r
		if (notice_msg_time != 0)\r
		{\r
			static int noticeMsgSum;\r
			if (timestamp - ms_to_ticks(notice_msg_time) > ms_to_ticks(STATUS_MSG_TIMEOUT)) {\r
				notice_msg_time = 0;\r
				plat_status_msg_clear();\r
				notice_msg = NULL;\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 - timestamp_fps >= ms_to_ticks(1000))\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
#else\r
			if (currentConfig.EmuOpt & EOPT_SHOW_FPS) {\r
				sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
				if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
			}\r
#endif\r
			frames_shown = frames_done = 0;\r
			timestamp_fps += ms_to_ticks(1000);\r
		}\r
#ifdef PFRAMES\r
		sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
#endif\r
\r
		if (timestamp - timestamp_base >= ms_to_ticks(1000))\r
		{\r
			if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && currentConfig.Frameskip >= 0)\r
				pframes_done = 0;\r
			else {\r
				pframes_done -= target_fps;\r
				/* don't allow it to drift during heavy slowdowns */\r
				if (pframes_done < -5) {\r
					reset_timing = 1;\r
					continue;\r
				}\r
				if (pframes_done < -2)\r
					pframes_done = -2;\r
			}\r
			timestamp_base += ms_to_ticks(1000);\r
		}\r
\r
		diff = timestamp - timestamp_base;\r
		diff_lim = (pframes_done + 1) * target_frametime;\r
\r
		if (currentConfig.Frameskip >= 0) // frameskip enabled\r
		{\r
			for (i = 0; i < currentConfig.Frameskip; i++) {\r
				emu_update_input();\r
				skip_frame(1);\r
				pframes_done++; frames_done++;\r
				diff_lim += target_frametime;\r
\r
				if (!(currentConfig.EmuOpt & EOPT_NO_FRMLIMIT)) {\r
					timestamp = get_ticks();\r
					diff = timestamp - timestamp_base;\r
					if (!reset_timing && diff < diff_lim) // we are too fast\r
						plat_wait_till_us(timestamp_base + diff_lim);\r
				}\r
			}\r
		}\r
		else if (diff > diff_lim)\r
		{\r
			/* no time left for this frame - skip */\r
			if (diff - diff_lim >= ms_to_ticks(200)) {\r
				/* if too much behind, reset instead */\r
				reset_timing = 1;\r
				continue;\r
			}\r
			emu_update_input();\r
			skip_frame(diff < diff_lim + target_frametime * 2);\r
			pframes_done++; frames_done++;\r
			continue;\r
		}\r
\r
		emu_update_input();\r
		PicoFrame();\r
\r
		/* frame limiter */\r
		if (!reset_timing && !(currentConfig.EmuOpt & EOPT_NO_FRMLIMIT))\r
		{\r
			timestamp = get_ticks();\r
			diff = timestamp - timestamp_base;\r
\r
			// sleep or vsync if we are still too fast\r
			if (diff < diff_lim)\r
			{\r
				// we are too fast\r
				plat_wait_till_us(timestamp_base + diff_lim - target_frametime / 4);\r
				if (currentConfig.EmuOpt & EOPT_VSYNC)\r
					plat_video_wait_vsync();\r
			}\r
		}\r
\r
		pemu_update_display(fpsbuff, notice_msg);\r
\r
		pframes_done++; frames_done++; frames_shown++;\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
\r
	// pemu_loop_end() might want to do 1 frame for bg image,\r
	// so free CD buffer here\r
	if (PicoAHW & PAHW_MCD)\r
		PicoCDBufferFree();\r
}\r
\r