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picodrive/platform/common/emu.c

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/*
* PicoDrive
* (C) notaz, 2007-2010
*
* This work is licensed under the terms of MAME license.
* See COPYING file in the top-level directory.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#ifdef __GP2X__
#include <unistd.h>
#endif
#include "../libpicofe/posix.h"
#include "../libpicofe/input.h"
#include "../libpicofe/fonts.h"
#include "../libpicofe/sndout.h"
#include "../libpicofe/lprintf.h"
#include "../libpicofe/plat.h"
#include "emu.h"
#include "input_pico.h"
#include "menu_pico.h"
#include "config_file.h"
#include <pico/pico_int.h>
#include <pico/patch.h>
#ifdef USE_LIBRETRO_VFS
#include "file_stream_transforms.h"
#endif
#if defined(__GNUC__) && __GNUC__ >= 7
#pragma GCC diagnostic ignored "-Wformat-truncation"
#endif
#ifndef _WIN32
#define PATH_SEP "/"
#define PATH_SEP_C '/'
#else
#define PATH_SEP "\\"
#define PATH_SEP_C '\\'
#endif
#define STATUS_MSG_TIMEOUT 2000
void *g_screen_ptr;
int g_screen_width = 320;
int g_screen_height = 240;
int g_screen_ppitch = 320; // pitch in pixels
const char *PicoConfigFile = "config2.cfg";
currentConfig_t currentConfig, defaultConfig;
int state_slot = 0;
int config_slot = 0, config_slot_current = 0;
int pico_pen_x = 320/2, pico_pen_y = 240/2;
int pico_inp_mode;
int flip_after_sync;
int engineState = PGS_Menu;
static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
/* tmp buff to reduce stack usage for plats with small stack */
static char static_buff[512];
const char *rom_fname_reload;
char rom_fname_loaded[512];
int reset_timing = 0;
static unsigned int notice_msg_time; /* when started showing */
static char noticeMsg[40];
unsigned char *movie_data = NULL;
static int movie_size = 0;
/* don't use tolower() for easy old glibc binary compatibility */
static void strlwr_(char *string)
{
char *p;
for (p = string; *p; p++)
if ('A' <= *p && *p <= 'Z')
*p += 'a' - 'A';
}
static int try_rfn_cut(char *fname)
{
FILE *tmp;
char *p;
p = fname + strlen(fname) - 1;
for (; p > fname; p--)
if (*p == '.') break;
*p = 0;
if((tmp = fopen(fname, "rb"))) {
fclose(tmp);
return 1;
}
return 0;
}
static void get_ext(const char *file, char *ext)
{
const char *p;
p = file + strlen(file) - 4;
if (p < file) p = file;
strncpy(ext, p, 4);
ext[4] = 0;
strlwr_(ext);
}
static void fname_ext(char *dst, int dstlen, const char *prefix, const char *ext, const char *fname)
{
int prefix_len = 0;
const char *p;
*dst = 0;
if (prefix) {
int len = plat_get_root_dir(dst, dstlen);
strcpy(dst + len, prefix);
prefix_len = len + strlen(prefix);
}
p = fname + strlen(fname) - 1;
for (; p >= fname && *p != PATH_SEP_C; p--)
;
p++;
strncpy(dst + prefix_len, p, dstlen - prefix_len - 1);
dst[dstlen - 8] = 0;
if ((p = strrchr(dst, '.')) != NULL)
dst[p-dst] = 0;
if (ext)
strcat(dst, ext);
}
static void romfname_ext(char *dst, int dstlen, const char *prefix, const char *ext)
{
fname_ext(dst, dstlen, prefix, ext, rom_fname_loaded);
}
void emu_status_msg(const char *format, ...)
{
va_list vl;
int ret;
va_start(vl, format);
ret = vsnprintf(noticeMsg, sizeof(noticeMsg), format, vl);
va_end(vl);
/* be sure old text gets overwritten */
for (; ret < 28; ret++)
noticeMsg[ret] = ' ';
noticeMsg[ret] = 0;
notice_msg_time = plat_get_ticks_ms();
}
static const char * const biosfiles_us[] = {
"us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
};
static const char * const biosfiles_eu[] = {
"eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
};
static const char * const biosfiles_jp[] = {
"jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
};
static const char *find_bios(int *region, const char *cd_fname)
{
int i, count;
const char * const *files;
FILE *f = NULL;
int ret;
// we need to have config loaded at this point
ret = emu_read_config(cd_fname, 0);
if (!ret) emu_read_config(NULL, 0);
if (PicoIn.regionOverride) {
*region = PicoIn.regionOverride;
lprintf("override region to %s\n", *region != 4 ?
(*region == 8 ? "EU" : "JAP") : "USA");
}
if (*region == 4) { // US
files = biosfiles_us;
count = sizeof(biosfiles_us) / sizeof(char *);
} else if (*region == 8) { // EU
files = biosfiles_eu;
count = sizeof(biosfiles_eu) / sizeof(char *);
} else if (*region == 1 || *region == 2) {
files = biosfiles_jp;
count = sizeof(biosfiles_jp) / sizeof(char *);
} else {
return 0;
}
for (i = 0; i < count; i++)
{
emu_make_path(static_buff, files[i], sizeof(static_buff) - 4);
strcat(static_buff, ".bin");
f = fopen(static_buff, "rb");
if (f) break;
static_buff[strlen(static_buff) - 4] = 0;
strcat(static_buff, ".zip");
f = fopen(static_buff, "rb");
if (f) break;
}
if (f) {
lprintf("using bios: %s\n", static_buff);
fclose(f);
return static_buff;
} else {
sprintf(static_buff, "no %s BIOS files found, read docs",
*region != 4 ? (*region == 8 ? "EU" : "JAP") : "USA");
menu_update_msg(static_buff);
return NULL;
}
}
/* check if the name begins with BIOS name */
/*
static int emu_isBios(const char *name)
{
int i;
for (i = 0; i < sizeof(biosfiles_us)/sizeof(biosfiles_us[0]); i++)
if (strstr(name, biosfiles_us[i]) != NULL) return 1;
for (i = 0; i < sizeof(biosfiles_eu)/sizeof(biosfiles_eu[0]); i++)
if (strstr(name, biosfiles_eu[i]) != NULL) return 1;
for (i = 0; i < sizeof(biosfiles_jp)/sizeof(biosfiles_jp[0]); i++)
if (strstr(name, biosfiles_jp[i]) != NULL) return 1;
return 0;
}
*/
static int extract_text(char *dest, const unsigned char *src, int len, int swab)
{
char *p = dest;
int i;
if (swab) swab = 1;
for (i = len - 1; i >= 0; i--)
{
if (src[i^swab] != ' ') break;
}
len = i + 1;
for (i = 0; i < len; i++)
{
unsigned char s = src[i^swab];
if (s >= 0x20 && s < 0x7f && s != '#' && s != '|' &&
s != '[' && s != ']' && s != '\\')
{
*p++ = s;
}
else
{
sprintf(p, "\\%02x", s);
p += 3;
}
}
return p - dest;
}
static char *emu_make_rom_id(const char *fname)
{
static char id_string[3+0xe*3+0x3*3+0x30*3+3];
int pos, swab = 1;
if (PicoIn.AHW & PAHW_MCD) {
strcpy(id_string, "CD|");
swab = 0;
}
else if (PicoIn.AHW & PAHW_SMS)
strcpy(id_string, "MS|");
else strcpy(id_string, "MD|");
pos = 3;
if (!(PicoIn.AHW & PAHW_SMS)) {
pos += extract_text(id_string + pos, media_id_header + 0x80, 0x0e, swab); // serial
id_string[pos] = '|'; pos++;
pos += extract_text(id_string + pos, media_id_header + 0xf0, 0x03, swab); // region
id_string[pos] = '|'; pos++;
pos += extract_text(id_string + pos, media_id_header + 0x50, 0x30, swab); // overseas name
id_string[pos] = 0;
if (pos > 5)
return id_string;
pos = 3;
}
// can't find name in ROM, use filename
fname_ext(id_string + 3, sizeof(id_string) - 3, NULL, NULL, fname);
return id_string;
}
// buffer must be at least 150 byte long
void emu_get_game_name(char *str150)
{
int ret, swab = (PicoIn.AHW & PAHW_MCD) ? 0 : 1;
char *s, *d;
ret = extract_text(str150, media_id_header + 0x50, 0x30, swab); // overseas name
for (s = d = str150 + 1; s < str150+ret; s++)
{
if (*s == 0) break;
if (*s != ' ' || d[-1] != ' ')
*d++ = *s;
}
*d = 0;
}
static void system_announce(void)
{
const char *sys_name, *tv_standard, *extra = "";
int fps;
if (PicoIn.AHW & PAHW_SMS) {
sys_name = "Master System";
if (Pico.m.hardware & 0x1)
sys_name = "Game Gear";
else if (Pico.m.hardware & 0x4)
sys_name = "Mark III";
#ifdef NO_SMS
extra = " [no support]";
#endif
} else if (PicoIn.AHW & PAHW_PICO) {
sys_name = "Pico";
} else if ((PicoIn.AHW & (PAHW_32X|PAHW_MCD)) == (PAHW_32X|PAHW_MCD)) {
sys_name = "32X + Mega CD";
if ((Pico.m.hardware & 0xc0) == 0x80)
sys_name = "32X + Sega CD";
} else if (PicoIn.AHW & PAHW_MCD) {
sys_name = "Mega CD";
if ((Pico.m.hardware & 0xc0) == 0x80)
sys_name = "Sega CD";
} else if (PicoIn.AHW & PAHW_32X) {
sys_name = "32X";
} else {
sys_name = "MegaDrive";
if ((Pico.m.hardware & 0xc0) == 0x80)
sys_name = "Genesis";
}
tv_standard = Pico.m.pal ? "PAL" : "NTSC";
fps = Pico.m.pal ? 50 : 60;
emu_status_msg("%s %s / %dFPS%s", tv_standard, sys_name, fps, extra);
}
static void do_region_override(const char *media_fname)
{
// we only need to override region if config tells us so
int ret = emu_read_config(media_fname, 0);
if (!ret) emu_read_config(NULL, 0);
}
int emu_reload_rom(const char *rom_fname_in)
{
// use setting before rom config is loaded
int autoload = g_autostateld_opt;
char *rom_fname = NULL;
char ext[5];
enum media_type_e media_type;
int menu_romload_started = 0;
char carthw_path[512];
int retval = 0;
lprintf("emu_ReloadRom(%s)\n", rom_fname_in);
rom_fname = strdup(rom_fname_in);
if (rom_fname == NULL)
return 0;
get_ext(rom_fname, ext);
// early cleanup
PicoPatchUnload();
if (movie_data) {
free(movie_data);
movie_data = 0;
}
if (!strcmp(ext, ".gmv"))
{
// check for both gmv and rom
int dummy;
FILE *movie_file = fopen(rom_fname, "rb");
if (!movie_file) {
menu_update_msg("Failed to open movie.");
goto out;
}
fseek(movie_file, 0, SEEK_END);
movie_size = ftell(movie_file);
fseek(movie_file, 0, SEEK_SET);
if (movie_size < 64+3) {
menu_update_msg("Invalid GMV file.");
fclose(movie_file);
goto out;
}
movie_data = malloc(movie_size);
if (movie_data == NULL) {
menu_update_msg("low memory.");
fclose(movie_file);
goto out;
}
dummy = fread(movie_data, 1, movie_size, movie_file);
fclose(movie_file);
if (strncmp((char *)movie_data, "Gens Movie TEST", 15) != 0) {
menu_update_msg("Invalid GMV file.");
goto out;
}
dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);
if (!dummy) {
menu_update_msg("Could't find a ROM for movie.");
goto out;
}
get_ext(rom_fname, ext);
lprintf("gmv loaded for %s\n", rom_fname);
}
else if (!strcmp(ext, ".pat"))
{
int dummy;
PicoPatchLoad(rom_fname);
dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);
if (!dummy) {
menu_update_msg("Could't find a ROM to patch.");
goto out;
}
get_ext(rom_fname, ext);
}
menu_romload_prepare(rom_fname); // also CD load
menu_romload_started = 1;
emu_make_path(carthw_path, "carthw.cfg", sizeof(carthw_path));
media_type = PicoLoadMedia(rom_fname, carthw_path,
find_bios, do_region_override);
switch (media_type) {
case PM_BAD_DETECT:
menu_update_msg("Not a ROM/CD img selected.");
goto out;
case PM_BAD_CD:
menu_update_msg("Invalid CD image");
goto out;
case PM_BAD_CD_NO_BIOS:
// find_bios() prints a message
goto out;
case PM_ERROR:
menu_update_msg("Load error");
goto out;
default:
break;
}
// make quirks visible in UI
if (PicoIn.quirks & PQUIRK_FORCE_6BTN)
currentConfig.input_dev0 = PICO_INPUT_PAD_6BTN;
menu_romload_end();
menu_romload_started = 0;
if (PicoPatches) {
PicoPatchPrepare();
PicoPatchApply();
}
// additional movie stuff
if (movie_data)
{
enum input_device indev = (movie_data[0x14] == '6') ?
PICO_INPUT_PAD_6BTN : PICO_INPUT_PAD_3BTN;
PicoSetInputDevice(0, indev);
PicoSetInputDevice(1, indev);
PicoIn.opt |= POPT_DIS_VDP_FIFO; // no VDP fifo timing
if (movie_data[0xF] >= 'A') {
if (movie_data[0x16] & 0x80) {
PicoIn.regionOverride = 8;
} else {
PicoIn.regionOverride = 4;
}
PicoReset();
// TODO: bits 6 & 5
}
movie_data[0x18+30] = 0;
emu_status_msg("MOVIE: %s", (char *) &movie_data[0x18]);
}
else
{
system_announce();
PicoIn.opt &= ~POPT_DIS_VDP_FIFO;
}
strncpy(rom_fname_loaded, rom_fname, sizeof(rom_fname_loaded)-1);
rom_fname_loaded[sizeof(rom_fname_loaded)-1] = 0;
// load SRAM for this ROM
if (currentConfig.EmuOpt & EOPT_EN_SRAM)
emu_save_load_game(1, 1);
// state autoload?
if (autoload) {
int time, newest = 0, newest_slot = -1;
int slot;
for (slot = 0; slot < 10; slot++) {
if (emu_check_save_file(slot, &time)) {
if (time > newest) {
newest = time;
newest_slot = slot;
}
}
}
if (newest_slot >= 0) {
lprintf("autoload slot %d\n", newest_slot);
state_slot = newest_slot;
emu_save_load_game(1, 0);
}
else {
lprintf("no save to autoload.\n");
}
}
retval = 1;
out:
if (menu_romload_started)
menu_romload_end();
free(rom_fname);
return retval;
}
int emu_swap_cd(const char *fname)
{
enum cd_track_type cd_type;
int ret = -1;
cd_type = PicoCdCheck(fname, NULL);
if (cd_type != CT_UNKNOWN)
ret = cdd_load(fname, cd_type);
if (ret != 0) {
menu_update_msg("Load failed, invalid CD image?");
return 0;
}
strncpy(rom_fname_loaded, fname, sizeof(rom_fname_loaded)-1);
rom_fname_loaded[sizeof(rom_fname_loaded) - 1] = 0;
return 1;
}
// <base dir><end>
void emu_make_path(char *buff, const char *end, int size)
{
int pos, end_len;
end_len = strlen(end);
pos = plat_get_root_dir(buff, size);
strncpy(buff + pos, end, size - pos);
buff[size - 1] = 0;
if (pos + end_len > size - 1)
lprintf("Warning: path truncated: %s\n", buff);
}
static void make_config_cfg(char *cfg_buff_512)
{
emu_make_path(cfg_buff_512, PicoConfigFile, 512-6);
if (config_slot != 0)
{
char *p = strrchr(cfg_buff_512, '.');
if (p == NULL)
p = cfg_buff_512 + strlen(cfg_buff_512);
sprintf(p, ".%i.cfg", config_slot);
}
cfg_buff_512[511] = 0;
}
void emu_prep_defconfig(void)
{
memset(&defaultConfig, 0, sizeof(defaultConfig));
defaultConfig.EmuOpt = EOPT_EN_SRAM | EOPT_EN_SOUND | EOPT_16BPP |
EOPT_EN_CD_LEDS | EOPT_GZIP_SAVES | 0x10/*?*/;
defaultConfig.s_PicoOpt = POPT_EN_SNDFILTER|POPT_EN_GG_LCD |
POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 |
POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX |
POPT_EN_DRC|POPT_ACC_SPRITES |
POPT_EN_32X|POPT_EN_PWM;
defaultConfig.s_PsndRate = 44100;
defaultConfig.s_PicoRegion = 0; // auto
defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP
defaultConfig.s_hwSelect = PHWS_AUTO;
defaultConfig.s_PicoCDBuffers = 0;
defaultConfig.s_PicoSndFilterAlpha = 0x10000 * 60 / 100;
defaultConfig.confirm_save = EOPT_CONFIRM_SAVE;
defaultConfig.Frameskip = -1; // auto
defaultConfig.input_dev0 = PICO_INPUT_PAD_3BTN;
defaultConfig.input_dev1 = PICO_INPUT_PAD_3BTN;
defaultConfig.volume = 50;
defaultConfig.gamma = 100;
defaultConfig.scaling = 0;
defaultConfig.turbo_rate = 15;
defaultConfig.msh2_khz = PICO_MSH2_HZ / 1000;
defaultConfig.ssh2_khz = PICO_SSH2_HZ / 1000;
defaultConfig.max_skip = 4;
// platform specific overrides
pemu_prep_defconfig();
}
void emu_set_defconfig(void)
{
memcpy(&currentConfig, &defaultConfig, sizeof(currentConfig));
PicoIn.opt = currentConfig.s_PicoOpt;
PicoIn.sndRate = currentConfig.s_PsndRate;
PicoIn.regionOverride = currentConfig.s_PicoRegion;
PicoIn.autoRgnOrder = currentConfig.s_PicoAutoRgnOrder;
PicoIn.hwSelect = currentConfig.s_hwSelect;
PicoIn.sndFilterAlpha = currentConfig.s_PicoSndFilterAlpha;
}
int emu_read_config(const char *rom_fname, int no_defaults)
{
char cfg[512];
int ret;
if (!no_defaults)
emu_set_defconfig();
if (rom_fname == NULL)
{
// global config
make_config_cfg(cfg);
ret = config_readsect(cfg, NULL);
}
else
{
char ext[16];
int vol;
if (config_slot != 0)
snprintf(ext, sizeof(ext), ".%i.cfg", config_slot);
else
strcpy(ext, ".cfg");
fname_ext(cfg, sizeof(cfg), "cfg"PATH_SEP, ext, rom_fname);
// read user's config
vol = currentConfig.volume;
ret = config_readsect(cfg, NULL);
currentConfig.volume = vol; // make vol global (bah)
if (ret != 0)
{
// read global config, and apply game_def.cfg on top
make_config_cfg(cfg);
config_readsect(cfg, NULL);
emu_make_path(cfg, "game_def.cfg", sizeof(cfg));
ret = config_readsect(cfg, emu_make_rom_id(rom_fname));
}
}
pemu_validate_config();
PicoIn.overclockM68k = currentConfig.overclock_68k;
// some sanity checks
if (currentConfig.volume < 0 || currentConfig.volume > 99)
currentConfig.volume = 50;
if (ret == 0)
config_slot_current = config_slot;
return (ret == 0);
}
int emu_write_config(int is_game)
{
char cfg[512];
int ret, write_lrom = 0;
if (!is_game)
{
make_config_cfg(cfg);
write_lrom = 1;
} else {
char ext[16];
if (config_slot != 0)
snprintf(ext, sizeof(ext), ".%i.cfg", config_slot);
else
strcpy(ext, ".cfg");
romfname_ext(cfg, sizeof(cfg), "cfg"PATH_SEP, ext);
}
lprintf("emu_write_config: %s ", cfg);
ret = config_write(cfg);
if (write_lrom) config_writelrom(cfg);
#ifdef __GP2X__
sync();
#endif
lprintf((ret == 0) ? "(ok)\n" : "(failed)\n");
if (ret == 0) config_slot_current = config_slot;
return ret == 0;
}
/* always using built-in font */
#define mk_text_out(name, type, val, topleft, step_x, step_y) \
void name(int x, int y, const char *text) \
{ \
int i, l, len = strlen(text); \
type *screen = (type *)(topleft) + x * step_x + y * step_y; \
\
for (i = 0; i < len; i++, screen += 8 * step_x) \
{ \
for (l = 0; l < 8; l++) \
{ \
unsigned char fd = fontdata8x8[text[i] * 8 + l];\
type *s = screen + l * step_y; \
if (fd&0x80) s[step_x * 0] = val; \
if (fd&0x40) s[step_x * 1] = val; \
if (fd&0x20) s[step_x * 2] = val; \
if (fd&0x10) s[step_x * 3] = val; \
if (fd&0x08) s[step_x * 4] = val; \
if (fd&0x04) s[step_x * 5] = val; \
if (fd&0x02) s[step_x * 6] = val; \
if (fd&0x01) s[step_x * 7] = val; \
} \
} \
}
mk_text_out(emu_text_out8, unsigned char, 0xf0, g_screen_ptr, 1, g_screen_ppitch)
mk_text_out(emu_text_out16, unsigned short, 0xffff, g_screen_ptr, 1, g_screen_ppitch)
mk_text_out(emu_text_out8_rot, unsigned char, 0xf0,
(char *)g_screen_ptr + (g_screen_ppitch - 1) * g_screen_height, -g_screen_height, 1)
mk_text_out(emu_text_out16_rot, unsigned short, 0xffff,
(short *)g_screen_ptr + (g_screen_ppitch - 1) * g_screen_height, -g_screen_height, 1)
#undef mk_text_out
void emu_osd_text16(int x, int y, const char *text)
{
int len = strlen(text) * 8;
int i, h;
len++;
if (x + len > g_screen_width)
len = g_screen_width - x;
for (h = 0; h < 8; h++) {
unsigned short *p;
p = (unsigned short *)g_screen_ptr
+ x + g_screen_ppitch * (y + h);
for (i = len; i > 0; i--, p++)
*p = (*p >> 2) & 0x39e7;
}
emu_text_out16(x, y, text);
}
static void update_movie(void)
{
int offs = Pico.m.frame_count*3 + 0x40;
if (offs+3 > movie_size) {
free(movie_data);
movie_data = 0;
emu_status_msg("END OF MOVIE.");
lprintf("END OF MOVIE.\n");
} else {
// MXYZ SACB RLDU
PicoIn.pad[0] = ~movie_data[offs] & 0x8f; // ! SCBA RLDU
if(!(movie_data[offs] & 0x10)) PicoIn.pad[0] |= 0x40; // C
if(!(movie_data[offs] & 0x20)) PicoIn.pad[0] |= 0x10; // A
if(!(movie_data[offs] & 0x40)) PicoIn.pad[0] |= 0x20; // B
PicoIn.pad[1] = ~movie_data[offs+1] & 0x8f; // ! SCBA RLDU
if(!(movie_data[offs+1] & 0x10)) PicoIn.pad[1] |= 0x40; // C
if(!(movie_data[offs+1] & 0x20)) PicoIn.pad[1] |= 0x10; // A
if(!(movie_data[offs+1] & 0x40)) PicoIn.pad[1] |= 0x20; // B
PicoIn.pad[0] |= (~movie_data[offs+2] & 0x0A) << 8; // ! MZYX
if(!(movie_data[offs+2] & 0x01)) PicoIn.pad[0] |= 0x0400; // X
if(!(movie_data[offs+2] & 0x04)) PicoIn.pad[0] |= 0x0100; // Z
PicoIn.pad[1] |= (~movie_data[offs+2] & 0xA0) << 4; // ! MZYX
if(!(movie_data[offs+2] & 0x10)) PicoIn.pad[1] |= 0x0400; // X
if(!(movie_data[offs+2] & 0x40)) PicoIn.pad[1] |= 0x0100; // Z
}
}
static int try_ropen_file(const char *fname, int *time)
{
struct stat st;
FILE *f;
f = fopen(fname, "rb");
if (f) {
if (time != NULL) {
*time = 0;
if (fstat(fileno(f), &st) == 0)
*time = (int)st.st_mtime;
}
fclose(f);
return 1;
}
return 0;
}
char *emu_get_save_fname(int load, int is_sram, int slot, int *time)
{
char *saveFname = static_buff;
char ext[16];
if (is_sram)
{
strcpy(ext, (PicoIn.AHW & PAHW_MCD) ? ".brm" : ".srm");
romfname_ext(saveFname, sizeof(static_buff),
(PicoIn.AHW & PAHW_MCD) ? "brm"PATH_SEP : "srm"PATH_SEP, ext);
if (!load)
return saveFname;
if (try_ropen_file(saveFname, time))
return saveFname;
romfname_ext(saveFname, sizeof(static_buff), NULL, ext);
if (try_ropen_file(saveFname, time))
return saveFname;
}
else
{
const char *ext_main = (currentConfig.EmuOpt & EOPT_GZIP_SAVES) ? ".mds.gz" : ".mds";
const char *ext_othr = (currentConfig.EmuOpt & EOPT_GZIP_SAVES) ? ".mds" : ".mds.gz";
ext[0] = 0;
if (slot > 0 && slot < 10)
sprintf(ext, ".%i", slot);
strcat(ext, ext_main);
if (!load) {
romfname_ext(saveFname, sizeof(static_buff), "mds" PATH_SEP, ext);
return saveFname;
}
else {
romfname_ext(saveFname, sizeof(static_buff), "mds" PATH_SEP, ext);
if (try_ropen_file(saveFname, time))
return saveFname;
romfname_ext(saveFname, sizeof(static_buff), NULL, ext);
if (try_ropen_file(saveFname, time))
return saveFname;
// try the other ext
ext[0] = 0;
if (slot > 0 && slot < 10)
sprintf(ext, ".%i", slot);
strcat(ext, ext_othr);
romfname_ext(saveFname, sizeof(static_buff), "mds"PATH_SEP, ext);
if (try_ropen_file(saveFname, time))
return saveFname;
}
}
return NULL;
}
int emu_check_save_file(int slot, int *time)
{
return emu_get_save_fname(1, 0, slot, time) ? 1 : 0;
}
int emu_save_load_game(int load, int sram)
{
int ret = 0;
char *saveFname;
// make save filename
saveFname = emu_get_save_fname(load, sram, state_slot, NULL);
if (saveFname == NULL) {
if (!sram)
emu_status_msg(load ? "LOAD FAILED (missing file)" : "SAVE FAILED");
return -1;
}
lprintf("saveLoad (%i, %i): %s\n", load, sram, saveFname);
if (sram)
{
FILE *sramFile;
int sram_size;
unsigned char *sram_data;
int truncate = 1;
if (PicoIn.AHW & PAHW_MCD)
{
if (PicoIn.opt & POPT_EN_MCD_RAMCART) {
sram_size = 0x12000;
sram_data = Pico.sv.data;
if (sram_data)
memcpy(sram_data, Pico_mcd->bram, 0x2000);
} else {
sram_size = 0x2000;
sram_data = Pico_mcd->bram;
truncate = 0; // the .brm may contain RAM cart data after normal brm
}
} else {
sram_size = Pico.sv.size;
sram_data = Pico.sv.data;
}
if (sram_data == NULL)
return 0; // cart saves forcefully disabled for this game
if (load)
{
sramFile = fopen(saveFname, "rb");
if (!sramFile)
return -1;
ret = fread(sram_data, 1, sram_size, sramFile);
ret = ret > 0 ? 0 : -1;
fclose(sramFile);
if ((PicoIn.AHW & PAHW_MCD) && (PicoIn.opt&POPT_EN_MCD_RAMCART))
memcpy(Pico_mcd->bram, sram_data, 0x2000);
} else {
// sram save needs some special processing
// see if we have anything to save
for (; sram_size > 0; sram_size--)
if (sram_data[sram_size-1]) break;
if (sram_size) {
sramFile = fopen(saveFname, truncate ? "wb" : "r+b");
if (!sramFile) sramFile = fopen(saveFname, "wb"); // retry
if (!sramFile) return -1;
ret = fwrite(sram_data, 1, sram_size, sramFile);
ret = (ret != sram_size) ? -1 : 0;
fclose(sramFile);
#ifdef __GP2X__
sync();
#endif
}
}
return ret;
}
else
{
ret = PicoState(saveFname, !load);
if (!ret) {
#ifdef __GP2X__
if (!load) sync();
#endif
emu_status_msg(load ? "STATE LOADED" : "STATE SAVED");
} else {
emu_status_msg(load ? "LOAD FAILED" : "SAVE FAILED");
ret = -1;
}
return ret;
}
}
void emu_set_fastforward(int set_on)
{
static void *set_PsndOut = NULL;
static int set_Frameskip, set_EmuOpt, is_on = 0;
if (set_on && !is_on) {
set_PsndOut = PicoIn.sndOut;
set_Frameskip = currentConfig.Frameskip;
set_EmuOpt = currentConfig.EmuOpt;
PicoIn.sndOut = NULL;
currentConfig.Frameskip = 8;
currentConfig.EmuOpt &= ~4;
currentConfig.EmuOpt |= EOPT_NO_FRMLIMIT;
is_on = 1;
emu_status_msg("FAST FORWARD");
}
else if (!set_on && is_on) {
PicoIn.sndOut = set_PsndOut;
currentConfig.Frameskip = set_Frameskip;
currentConfig.EmuOpt = set_EmuOpt;
PsndRerate(1);
is_on = 0;
// mainly to unbreak pcm
if (PicoIn.AHW & PAHW_MCD)
pcd_state_loaded();
}
}
static void emu_tray_open(void)
{
engineState = PGS_TrayMenu;
}
static void emu_tray_close(void)
{
emu_status_msg("CD tray closed.");
}
void emu_32x_startup(void)
{
plat_video_toggle_renderer(0, 0); // HACK
system_announce();
}
void emu_reset_game(void)
{
PicoReset();
reset_timing = 1;
}
void run_events_pico(unsigned int events)
{
int lim_x;
if (events & PEV_PICO_SWINP) {
pico_inp_mode++;
if (pico_inp_mode > 2)
pico_inp_mode = 0;
switch (pico_inp_mode) {
case 2: emu_status_msg("Input: Pen on Pad"); break;
case 1: emu_status_msg("Input: Pen on Storyware"); break;
case 0: emu_status_msg("Input: Joystick");
PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;
break;
}
}
if (events & PEV_PICO_PPREV) {
PicoPicohw.page--;
if (PicoPicohw.page < 0)
PicoPicohw.page = 0;
emu_status_msg("Page %i", PicoPicohw.page);
}
if (events & PEV_PICO_PNEXT) {
PicoPicohw.page++;
if (PicoPicohw.page > 6)
PicoPicohw.page = 6;
emu_status_msg("Page %i", PicoPicohw.page);
}
if (pico_inp_mode == 0)
return;
/* handle other input modes */
if (PicoIn.pad[0] & 1) pico_pen_y--;
if (PicoIn.pad[0] & 2) pico_pen_y++;
if (PicoIn.pad[0] & 4) pico_pen_x--;
if (PicoIn.pad[0] & 8) pico_pen_x++;
PicoIn.pad[0] &= ~0x0f; // release UDLR
lim_x = (Pico.video.reg[12]&1) ? 319 : 255;
if (pico_pen_y < 8)
pico_pen_y = 8;
if (pico_pen_y > 224 - PICO_PEN_ADJUST_Y)
pico_pen_y = 224 - PICO_PEN_ADJUST_Y;
if (pico_pen_x < 0)
pico_pen_x = 0;
if (pico_pen_x > lim_x - PICO_PEN_ADJUST_X)
pico_pen_x = lim_x - PICO_PEN_ADJUST_X;
PicoPicohw.pen_pos[0] = pico_pen_x;
if (!(Pico.video.reg[12] & 1))
PicoPicohw.pen_pos[0] += pico_pen_x / 4;
PicoPicohw.pen_pos[0] += 0x3c;
PicoPicohw.pen_pos[1] = pico_inp_mode == 1 ? (0x2f8 + pico_pen_y) : (0x1fc + pico_pen_y);
}
static void do_turbo(unsigned short *pad, int acts)
{
static int turbo_pad = 0;
static unsigned char turbo_cnt[3] = { 0, 0, 0 };
int inc = currentConfig.turbo_rate * 2;
if (acts & 0x1000) {
turbo_cnt[0] += inc;
if (turbo_cnt[0] >= 60)
turbo_pad ^= 0x10, turbo_cnt[0] = 0;
}
if (acts & 0x2000) {
turbo_cnt[1] += inc;
if (turbo_cnt[1] >= 60)
turbo_pad ^= 0x20, turbo_cnt[1] = 0;
}
if (acts & 0x4000) {
turbo_cnt[2] += inc;
if (turbo_cnt[2] >= 60)
turbo_pad ^= 0x40, turbo_cnt[2] = 0;
}
*pad |= turbo_pad & (acts >> 8);
}
static void run_events_ui(unsigned int which)
{
if (which & (PEV_STATE_LOAD|PEV_STATE_SAVE))
{
int do_it = 1;
if ( emu_check_save_file(state_slot, NULL) &&
(((which & PEV_STATE_LOAD) && (currentConfig.confirm_save & EOPT_CONFIRM_LOAD)) ||
((which & PEV_STATE_SAVE) && (currentConfig.confirm_save & EOPT_CONFIRM_SAVE))) )
{
const char *nm;
char tmp[64];
int keys, len;
strcpy(tmp, (which & PEV_STATE_LOAD) ? "LOAD STATE? " : "OVERWRITE SAVE? ");
len = strlen(tmp);
nm = in_get_key_name(-1, -PBTN_MOK);
snprintf(tmp + len, sizeof(tmp) - len, "(%s=yes, ", nm);
len = strlen(tmp);
nm = in_get_key_name(-1, -PBTN_MBACK);
snprintf(tmp + len, sizeof(tmp) - len, "%s=no)", nm);
plat_status_msg_busy_first(tmp);
in_set_config_int(0, IN_CFG_BLOCKING, 1);
while (in_menu_wait_any(NULL, 50) & (PBTN_MOK | PBTN_MBACK))
;
while ( !((keys = in_menu_wait_any(NULL, 50)) & (PBTN_MOK | PBTN_MBACK)))
;
if (keys & PBTN_MBACK)
do_it = 0;
while (in_menu_wait_any(NULL, 50) & (PBTN_MOK | PBTN_MBACK))
;
in_set_config_int(0, IN_CFG_BLOCKING, 0);
plat_status_msg_clear();
}
if (do_it) {
plat_status_msg_busy_first((which & PEV_STATE_LOAD) ? "LOADING STATE" : "SAVING STATE");
PicoStateProgressCB = plat_status_msg_busy_next;
emu_save_load_game((which & PEV_STATE_LOAD) ? 1 : 0, 0);
PicoStateProgressCB = NULL;
}
}
if (which & PEV_SWITCH_RND)
{
plat_video_toggle_renderer(1, 0);
}
if (which & (PEV_SSLOT_PREV|PEV_SSLOT_NEXT))
{
if (which & PEV_SSLOT_PREV) {
state_slot -= 1;
if (state_slot < 0)
state_slot = 9;
} else {
state_slot += 1;
if (state_slot > 9)
state_slot = 0;
}
emu_status_msg("SAVE SLOT %i [%s]", state_slot,
emu_check_save_file(state_slot, NULL) ? "USED" : "FREE");
}
if (which & PEV_RESET)
emu_reset_game();
if (which & PEV_MENU)
engineState = PGS_Menu;
}
void emu_update_input(void)
{
static int prev_events = 0;
int actions[IN_BINDTYPE_COUNT] = { 0, };
int pl_actions[2];
int events;
in_update(actions);
pl_actions[0] = actions[IN_BINDTYPE_PLAYER12];
pl_actions[1] = actions[IN_BINDTYPE_PLAYER12] >> 16;
PicoIn.pad[0] = pl_actions[0] & 0xfff;
PicoIn.pad[1] = pl_actions[1] & 0xfff;
if (pl_actions[0] & 0x7000)
do_turbo(&PicoIn.pad[0], pl_actions[0]);
if (pl_actions[1] & 0x7000)
do_turbo(&PicoIn.pad[1], pl_actions[1]);
events = actions[IN_BINDTYPE_EMU] & PEV_MASK;
// volume is treated in special way and triggered every frame
if (events & (PEV_VOL_DOWN|PEV_VOL_UP))
plat_update_volume(1, events & PEV_VOL_UP);
if ((events ^ prev_events) & PEV_FF) {
emu_set_fastforward(events & PEV_FF);
plat_update_volume(0, 0);
reset_timing = 1;
}
events &= ~prev_events;
if (PicoIn.AHW == PAHW_PICO)
run_events_pico(events);
if (events)
run_events_ui(events);
if (movie_data)
update_movie();
prev_events = actions[IN_BINDTYPE_EMU] & PEV_MASK;
}
static void mkdir_path(char *path_with_reserve, int pos, const char *name)
{
strcpy(path_with_reserve + pos, name);
if (plat_is_dir(path_with_reserve))
return;
if (mkdir(path_with_reserve, 0777) < 0)
lprintf("failed to create: %s\n", path_with_reserve);
}
void emu_cmn_forced_frame(int no_scale, int do_emu, void *buf)
{
int po_old = PicoIn.opt;
int y;
for (y = 0; y < g_screen_height; y++)
memset32((short *)g_screen_ptr + g_screen_ppitch * y, 0,
g_screen_width * 2 / 4);
PicoIn.opt &= ~(POPT_ALT_RENDERER|POPT_EN_SOFTSCALE);
PicoIn.opt |= POPT_ACC_SPRITES;
if (!no_scale && currentConfig.scaling)
PicoIn.opt |= POPT_EN_SOFTSCALE;
PicoDrawSetOutFormat(PDF_RGB555, 1);
PicoDrawSetOutBuf(buf, g_screen_ppitch * 2);
Pico.m.dirtyPal = 1;
Pico.est.rendstatus |= PDRAW_DIRTY_SPRITES;
if (do_emu)
PicoFrame();
else
PicoFrameDrawOnly();
PicoIn.opt = po_old;
}
void emu_init(void)
{
char path[512];
int pos;
#if 0
// FIXME: handle through menu, etc
FILE *f;
f = fopen("32X_M_BIOS.BIN", "rb");
p32x_bios_m = malloc(2048);
fread(p32x_bios_m, 1, 2048, f);
fclose(f);
f = fopen("32X_S_BIOS.BIN", "rb");
p32x_bios_s = malloc(1024);
fread(p32x_bios_s, 1, 1024, f);
fclose(f);
#endif
/* make dirs for saves */
pos = plat_get_root_dir(path, sizeof(path) - 4);
mkdir_path(path, pos, "mds");
mkdir_path(path, pos, "srm");
mkdir_path(path, pos, "brm");
mkdir_path(path, pos, "cfg");
pprof_init();
make_config_cfg(path);
config_readlrom(path);
PicoInit();
PicoIn.osdMessage = plat_status_msg_busy_next;
PicoIn.mcdTrayOpen = emu_tray_open;
PicoIn.mcdTrayClose = emu_tray_close;
sndout_init();
}
void emu_finish(void)
{
// save SRAM
if ((currentConfig.EmuOpt & EOPT_EN_SRAM) && Pico.sv.changed) {
emu_save_load_game(0, 1);
Pico.sv.changed = 0;
}
if (!(currentConfig.EmuOpt & EOPT_NO_AUTOSVCFG)) {
char cfg[512];
make_config_cfg(cfg);
config_writelrom(cfg);
#ifdef __GP2X__
sync();
#endif
}
pprof_finish();
PicoExit();
sndout_exit();
}
static void snd_write_nonblocking(int len)
{
sndout_write_nb(PicoIn.sndOut, len);
}
void emu_sound_start(void)
{
PicoIn.sndOut = NULL;
if (currentConfig.EmuOpt & EOPT_EN_SOUND)
{
int is_stereo = (PicoIn.opt & POPT_EN_STEREO) ? 1 : 0;
PsndRerate(Pico.m.frame_count ? 1 : 0);
printf("starting audio: %i len: %i stereo: %i, pal: %i\n",
PicoIn.sndRate, Pico.snd.len, is_stereo, Pico.m.pal);
sndout_start(PicoIn.sndRate, is_stereo);
PicoIn.writeSound = snd_write_nonblocking;
plat_update_volume(0, 0);
memset(sndBuffer, 0, sizeof(sndBuffer));
PicoIn.sndOut = sndBuffer;
}
}
void emu_sound_stop(void)
{
sndout_stop();
}
void emu_sound_wait(void)
{
sndout_wait();
}
static void emu_loop_prep(void)
{
static int pal_old = -1;
static int filter_old = -1;
if (currentConfig.CPUclock != plat_target_cpu_clock_get())
plat_target_cpu_clock_set(currentConfig.CPUclock);
if (Pico.m.pal != pal_old) {
plat_target_lcdrate_set(Pico.m.pal);
pal_old = Pico.m.pal;
}
if (currentConfig.filter != filter_old) {
plat_target_hwfilter_set(currentConfig.filter);
filter_old = currentConfig.filter;
}
plat_target_gamma_set(currentConfig.gamma, 0);
pemu_loop_prep();
}
/* our tick here is 1 us right now */
#define ms_to_ticks(x) (unsigned int)(x * 1000)
#define get_ticks() plat_get_ticks_us()
#define vsync_delay_x3 3*ms_to_ticks(1)
void emu_loop(void)
{
int frames_done, frames_shown; /* actual frames for fps counter */
int target_frametime_x3;
unsigned int timestamp_x3 = 0;
unsigned int timestamp_aim_x3 = 0;
unsigned int timestamp_fps_x3 = 0;
char *notice_msg = NULL;
char fpsbuff[24];
int fskip_cnt = 0;
fpsbuff[0] = 0;
PicoLoopPrepare();
plat_video_loop_prepare();
emu_loop_prep();
pemu_sound_start();
/* number of ticks per frame */
if (Pico.m.pal)
target_frametime_x3 = 3 * ms_to_ticks(1000) / 50;
else
target_frametime_x3 = 3 * ms_to_ticks(1000) / 60;
reset_timing = 1;
frames_done = frames_shown = 0;
/* loop with resync every 1 sec. */
while (engineState == PGS_Running)
{
int skip = 0;
int diff;
pprof_start(main);
if (reset_timing) {
reset_timing = 0;
plat_video_wait_vsync();
timestamp_aim_x3 = get_ticks() * 3;
timestamp_fps_x3 = timestamp_aim_x3;
fskip_cnt = 0;
}
else if (currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) {
timestamp_aim_x3 = get_ticks() * 3;
}
timestamp_x3 = get_ticks() * 3;
// show notice_msg message?
if (notice_msg_time != 0)
{
static int noticeMsgSum;
if (timestamp_x3 - ms_to_ticks(notice_msg_time) * 3
> ms_to_ticks(STATUS_MSG_TIMEOUT) * 3)
{
notice_msg_time = 0;
notice_msg = NULL;
plat_status_msg_clear();
}
else {
int sum = noticeMsg[0] + noticeMsg[1] + noticeMsg[2];
if (sum != noticeMsgSum) {
plat_status_msg_clear();
noticeMsgSum = sum;
}
notice_msg = noticeMsg;
}
}
// second changed?
if (timestamp_x3 - timestamp_fps_x3 >= ms_to_ticks(1000) * 3)
{
#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);
printf("%s\n", fpsbuff);
#else
if (currentConfig.EmuOpt & EOPT_SHOW_FPS)
snprintf(fpsbuff, 8, "%02i/%02i ", frames_shown, frames_done);
#endif
frames_shown = frames_done = 0;
timestamp_fps_x3 += ms_to_ticks(1000) * 3;
}
#ifdef PFRAMES
sprintf(fpsbuff, "%i", Pico.m.frame_count);
#endif
diff = timestamp_aim_x3 - timestamp_x3;
if (currentConfig.Frameskip >= 0) // frameskip enabled (or 0)
{
if (fskip_cnt < currentConfig.Frameskip) {
fskip_cnt++;
skip = 1;
}
else {
fskip_cnt = 0;
}
}
else if (diff < -target_frametime_x3)
{
/* no time left for this frame - skip */
/* limit auto frameskip to max_skip */
if (fskip_cnt < currentConfig.max_skip) {
fskip_cnt++;
skip = 1;
}
else {
fskip_cnt = 0;
}
} else
fskip_cnt = 0;
// don't go in debt too much
while (diff < -target_frametime_x3 * 3) {
timestamp_aim_x3 += target_frametime_x3;
diff = timestamp_aim_x3 - timestamp_x3;
}
emu_update_input();
if (skip) {
int do_audio = diff > -target_frametime_x3 * 2;
PicoIn.skipFrame = do_audio ? 1 : 2;
PicoFrame();
PicoIn.skipFrame = 0;
}
else {
PicoFrame();
pemu_finalize_frame(fpsbuff, notice_msg);
frames_shown++;
}
frames_done++;
timestamp_aim_x3 += target_frametime_x3;
if (!skip && !flip_after_sync)
plat_video_flip();
/* frame limiter */
if (!skip && !reset_timing
&& !(currentConfig.EmuOpt & (EOPT_NO_FRMLIMIT|EOPT_EXT_FRMLIMIT)))
{
unsigned int timestamp = get_ticks();
diff = timestamp_aim_x3 - timestamp * 3;
// sleep or vsync if we are still too fast
if (diff > target_frametime_x3 + vsync_delay_x3 && (currentConfig.EmuOpt & EOPT_VSYNC)) {
// we are too fast
plat_video_wait_vsync();
timestamp = get_ticks();
diff = timestamp * 3 - timestamp_aim_x3;
}
if (diff > target_frametime_x3 + vsync_delay_x3) {
// still too fast
plat_wait_till_us(timestamp + (diff - target_frametime_x3) / 3);
}
}
if (!skip && flip_after_sync)
plat_video_flip();
pprof_end(main);
}
emu_set_fastforward(0);
// save SRAM
if ((currentConfig.EmuOpt & EOPT_EN_SRAM) && Pico.sv.changed) {
plat_status_msg_busy_first("Writing SRAM/BRAM...");
emu_save_load_game(0, 1);
Pico.sv.changed = 0;
}
pemu_loop_end();
emu_sound_stop();
}
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