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Genesis-Plus-GX/libretro/libretro.c
Twinaphex b15a94ffdf (Libretro) Add nonblock_state
2012-08-15 09:50:47 +02:00

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#ifndef _MSC_VER
#include <stdbool.h>
#endif
#include <stddef.h>
#include <stdarg.h>
#include <stdio.h>
#ifdef _MSC_VER
#define snprintf _snprintf
#endif
#include "shared.h"
#include "libretro.h"
#include "state.h"
#include "genesis.h"
#include "md_ntsc.h"
#include "sms_ntsc.h"
sms_ntsc_t *sms_ntsc;
md_ntsc_t *md_ntsc;
static int vwidth;
static int vheight;
static bool failed_init;
unsigned retro_api_version(void) { return RETRO_API_VERSION; }
static retro_video_refresh_t video_cb;
static retro_input_poll_t input_poll_cb;
static retro_input_state_t input_state_cb;
static retro_environment_t environ_cb;
static retro_audio_sample_batch_t audio_batch_cb;
void retro_set_environment(retro_environment_t cb) { environ_cb = cb; }
void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
struct bind_conv
{
int retro;
int genesis;
};
static struct bind_conv binds[] = {
{ RETRO_DEVICE_ID_JOYPAD_B, INPUT_B },
{ RETRO_DEVICE_ID_JOYPAD_A, INPUT_C },
{ RETRO_DEVICE_ID_JOYPAD_X, INPUT_Y },
{ RETRO_DEVICE_ID_JOYPAD_Y, INPUT_A },
{ RETRO_DEVICE_ID_JOYPAD_START, INPUT_START },
{ RETRO_DEVICE_ID_JOYPAD_L, INPUT_X },
{ RETRO_DEVICE_ID_JOYPAD_R, INPUT_Z },
{ RETRO_DEVICE_ID_JOYPAD_UP, INPUT_UP },
{ RETRO_DEVICE_ID_JOYPAD_DOWN, INPUT_DOWN },
{ RETRO_DEVICE_ID_JOYPAD_LEFT, INPUT_LEFT },
{ RETRO_DEVICE_ID_JOYPAD_RIGHT, INPUT_RIGHT },
{ RETRO_DEVICE_ID_JOYPAD_SELECT, INPUT_MODE },
};
static char g_rom_dir[1024];
extern uint8 system_hw;
char GG_ROM[256];
char AR_ROM[256];
char SK_ROM[256];
char SK_UPMEM[256];
char GG_BIOS[256];
char MS_BIOS_EU[256];
char MS_BIOS_JP[256];
char MS_BIOS_US[256];
char CD_BIOS_EU[256];
char CD_BIOS_US[256];
char CD_BIOS_JP[256];
char DEFAULT_PATH[1024];
char CD_BRAM_JP[256];
char CD_BRAM_US[256];
char CD_BRAM_EU[256];
char CART_BRAM[256];
/* Mega CD backup RAM stuff */
static uint32_t brm_crc[2];
static uint8_t brm_format[0x40] =
{
0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x00,0x00,0x00,0x00,0x40,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x53,0x45,0x47,0x41,0x5f,0x43,0x44,0x5f,0x52,0x4f,0x4d,0x00,0x01,0x00,0x00,0x00,
0x52,0x41,0x4d,0x5f,0x43,0x41,0x52,0x54,0x52,0x49,0x44,0x47,0x45,0x5f,0x5f,0x5f
};
/************************************
* Genesis Plus implementation
************************************/
#define CHUNKSIZE (0x10000)
void error(char * msg, ...)
{
#ifdef _XBOX1
char buffer[1024];
#endif
va_list ap;
va_start(ap, msg);
#ifdef _XBOX1
vsnprintf(buffer, sizeof(buffer), msg, ap);
OutputDebugStringA(buffer);
#else
vfprintf(stderr, msg, ap);
#endif
va_end(ap);
}
int load_archive(char *filename, unsigned char *buffer, int maxsize, char *extension)
{
int size = 0;
char in[CHUNKSIZE];
char msg[64] = "Unable to open file";
/* Open file */
FILE *fd = fopen(filename, "rb");
/* Master System & Game Gear BIOS are optional files */
if (!strcmp(filename,MS_BIOS_US) || !strcmp(filename,MS_BIOS_EU) || !strcmp(filename,MS_BIOS_JP) || !strcmp(filename,GG_BIOS))
{
/* disable all messages */
}
/* Mega CD BIOS are required files */
if (!strcmp(filename,CD_BIOS_US) || !strcmp(filename,CD_BIOS_EU) || !strcmp(filename,CD_BIOS_JP))
{
sprintf(msg,"Unable to open CD BIOS");
}
if (!fd)
{
fprintf(stderr, "ERROR - %s.\n");
return 0;
}
/* Read first chunk */
fread(in, CHUNKSIZE, 1, fd);
{
int left;
/* Get file size */
fseek(fd, 0, SEEK_END);
size = ftell(fd);
fseek(fd, 0, SEEK_SET);
/* size limit */
if(size > maxsize)
{
fclose(fd);
fprintf(stderr, "ERROR - File is too large.\n");
return 0;
}
sprintf((char *)msg,"Loading %d bytes ...", size);
fprintf(stderr, "INFORMATION - %s\n", msg);
/* filename extension */
if (extension)
{
memcpy(extension, &filename[strlen(filename) - 3], 3);
extension[3] = 0;
}
/* Read into buffer */
left = size;
while (left > CHUNKSIZE)
{
fread(buffer, CHUNKSIZE, 1, fd);
buffer += CHUNKSIZE;
left -= CHUNKSIZE;
}
/* Read remaining bytes */
fread(buffer, left, 1, fd);
}
/* Close file */
fclose(fd);
/* Return loaded ROM size */
return size;
}
static uint16_t bitmap_data_[1024 * 512];
static void init_bitmap(void)
{
memset(&bitmap, 0, sizeof(bitmap));
bitmap.width = 1024;
bitmap.height = 512;
bitmap.pitch = bitmap.width * sizeof(uint16_t);
bitmap.data = (uint8_t *)bitmap_data_;
bitmap.viewport.w = 0;
bitmap.viewport.h = 0;
bitmap.viewport.x = 0;
bitmap.viewport.y = 0;
}
#define CONFIG_VERSION "GENPLUS-GX 1.6.1"
static void config_default(void)
{
/* version TAG */
strncpy(config.version,CONFIG_VERSION,16);
/* sound options */
config.psg_preamp = 150;
config.fm_preamp = 100;
config.hq_fm = 1;
config.psgBoostNoise = 0;
config.filter = 0;
config.lp_range = 50;
config.low_freq = 880;
config.high_freq = 5000;
config.lg = 1.0;
config.mg = 1.0;
config.hg = 1.0;
config.rolloff = 0.990;
config.dac_bits = 14;
config.ym2413 = 2; /* AUTO */
/* system options */
config.system = 0; /* AUTO */
config.region_detect = 0; /* AUTO */
config.vdp_mode = 0; /* AUTO */
config.master_clock = 0; /* AUTO */
config.force_dtack = 0;
config.addr_error = 1;
config.bios = 0;
config.lock_on = 0;
config.hot_swap = 0;
/* video options */
config.xshift = 0;
config.yshift = 0;
config.xscale = 0;
config.yscale = 0;
config.aspect = 0;
config.overscan = 0; /* 3 == FULL */
#if defined(USE_NTSC)
config.ntsc = 1;
#endif
config.vsync = 1; /* AUTO */
config.render = 0;
config.bilinear = 0;
/* controllers options */
config.gun_cursor[0] = 1;
config.gun_cursor[1] = 1;
config.invert_mouse = 0;
/* menu options */
config.autoload = 0;
config.autocheat = 0;
config.s_auto = 0;
config.s_default = 1;
config.s_device = 0;
config.l_device = 0;
config.bg_overlay = 0;
config.screen_w = 658;
config.bgm_volume = 100.0;
config.sfx_volume = 100.0;
/* hot swap requires at least a first initialization */
config.hot_swap &= 1;
}
static const double pal_fps = 53203424.0 / (3420.0 * 313.0);
static const double ntsc_fps = 53693175.0 / (3420.0 * 262.0);
static void init_audio(void)
{
audio_init(44100, vdp_pal ? pal_fps : ntsc_fps);
}
static void configure_controls(void)
{
unsigned i;
switch (system_hw)
{
case SYSTEM_MD:
case SYSTEM_MCD:
for(i = 0; i < MAX_INPUTS; i++)
{
config.input[i].padtype = DEVICE_PAD6B;
input.system[i] = SYSTEM_MD_GAMEPAD;
}
break;
case SYSTEM_GG:
case SYSTEM_SMS:
input.system[0] = SYSTEM_MS_GAMEPAD;
input.system[1] = SYSTEM_MS_GAMEPAD;
break;
default:
break;
}
}
static int slot_load(int slot)
{
char filename[MAXPATHLEN];
unsigned long filesize, done = 0;
uint8_t *buffer;
/* File Type */
if (slot > 0)
{
fprintf(stderr, "INFORMATION - Loading State ...\n");
}
else
{
if (!sram.on || (system_hw == SYSTEM_MCD))
{
fprintf(stderr, "ERROR - SRAM is disabled.\n");
return 0;
}
fprintf(stderr, "INFORMATION - Loading SRAM ...\n");
}
/* Device Type */
{
FILE *fp;
/* FAT file */
if (slot > 0)
{
sprintf (filename,"%s/saves/%s.gp%d", DEFAULT_PATH, rom_filename, slot - 1);
}
else
{
sprintf (filename,"%s/saves/%s.srm", DEFAULT_PATH, rom_filename);
}
/* Open file */
fp = fopen(filename, "rb");
if (!fp)
{
fprintf(stderr, "ERROR - Unable to open file.\n");
return 0;
}
/* Get file size */
fseek(fp, 0, SEEK_END);
filesize = ftell(fp);
fseek(fp, 0, SEEK_SET);
/* allocate buffer */
buffer = (uint8_t *)malloc(filesize);
if (!buffer)
{
fprintf(stderr, "ERROR - Unable to allocate memory.\n");
fclose(fp);
return 0;
}
/* Read into buffer (2k blocks) */
while (filesize > CHUNKSIZE)
{
fread(buffer + done, CHUNKSIZE, 1, fp);
done += CHUNKSIZE;
filesize -= CHUNKSIZE;
}
/* Read remaining bytes */
fread(buffer + done, filesize, 1, fp);
done += filesize;
/* Close file */
fclose(fp);
}
if (slot > 0)
{
/* Load state */
if (state_load(buffer) <= 0)
{
free(buffer);
fprintf(stderr, "Invalid state file.\n");
return 0;
}
}
else
{
/* load SRAM */
memcpy(sram.sram, buffer, 0x10000);
/* update CRC */
sram.crc = crc32(0, sram.sram, 0x10000);
}
free(buffer);
return 1;
}
static int slot_save(int slot)
{
FILE *fp;
char filename[MAXPATHLEN];
unsigned long filesize, done = 0;
uint8_t *buffer;
if (slot > 0)
{
fprintf(stderr, "INFORMATION - Saving State ...\n");
/* allocate buffer */
buffer = (uint8_t *)malloc(STATE_SIZE);
if (!buffer)
{
fprintf(stderr, "ERROR - Unable to allocate memory.\n");
return 0;
}
filesize = state_save(buffer);
}
else
{
/* only save if SRAM is enabled */
if (!sram.on || (system_hw == SYSTEM_MCD))
{
fprintf(stderr, "ERROR - SRAM is disabled.\n");
return 0;
}
/* only save if SRAM has been modified */
if (crc32(0, &sram.sram[0], 0x10000) == sram.crc)
{
fprintf(stderr, "WARNING - SRAM not modified.\n");
return 0;
}
fprintf(stderr, "INFORMATION - Saving SRAM ...\n");
/* allocate buffer */
buffer = (uint8_t *)malloc(0x10000);
if (!buffer)
{
fprintf(stderr, "ERROR - Unable to allocate memory.\n");
return 0;
}
/* copy SRAM data */
memcpy(buffer, sram.sram, 0x10000);
filesize = 0x10000;
/* update CRC */
sram.crc = crc32(0, sram.sram, 0x10000);
}
/* Device Type */
{
/* FAT filename */
if (slot > 0)
{
sprintf(filename, "%s/saves/%s.gp%d", DEFAULT_PATH, rom_filename, slot - 1);
}
else
{
sprintf(filename, "%s/saves/%s.srm", DEFAULT_PATH, rom_filename);
}
/* Open file */
fp = fopen(filename, "wb");
if (!fp)
{
fprintf(stderr, "ERROR - Unable to open file.\n");
free(buffer);
return 0;
}
/* Write from buffer (2k blocks) */
while (filesize > CHUNKSIZE)
{
fwrite(buffer + done, CHUNKSIZE, 1, fp);
done += CHUNKSIZE;
filesize -= CHUNKSIZE;
}
/* Write remaining bytes */
fwrite(buffer + done, filesize, 1, fp);
done += filesize;
/* Close file */
fclose(fp);
free(buffer);
}
return 1;
}
static void slot_autoload(int slot)
{
FILE *fp;
/* Mega CD backup RAM specific */
if (!slot && (system_hw == SYSTEM_MCD))
{
/* automatically load internal backup RAM */
unsigned i = ((region_code ^ 0x40) >> 6) - 1;
const char *path = NULL;
switch(i)
{
case 0:
path = CD_BRAM_JP;
break;
case 1:
path = CD_BRAM_EU;
break;
case 2:
path = CD_BRAM_US;
break;
default:
return;
}
fp = fopen(path, "rb");
if (fp != NULL)
{
fread(scd.bram, 0x2000, 1, fp);
fclose(fp);
/* update CRC */
brm_crc[0] = crc32(0, scd.bram, 0x2000);
}
else
{
/* force internal backup RAM format (does not use previous region backup RAM) */
scd.bram[0x1fff] = 0;
}
/* check if internal backup RAM is correctly formatted */
if (memcmp(scd.bram + 0x2000 - 0x20, brm_format + 0x20, 0x20))
{
/* clear internal backup RAM */
memset(scd.bram, 0x00, 0x2000 - 0x40);
/* internal Backup RAM size fields */
brm_format[0x10] = brm_format[0x12] = brm_format[0x14] = brm_format[0x16] = 0x00;
brm_format[0x11] = brm_format[0x13] = brm_format[0x15] = brm_format[0x17] = (sizeof(scd.bram) / 64) - 3;
/* format internal backup RAM */
memcpy(scd.bram + 0x2000 - 0x40, brm_format, 0x40);
/* clear CRC to force file saving (in case previous region backup RAM was also formatted) */
brm_crc[0] = 0;
}
/* automatically load cartridge backup RAM (if enabled) */
if (scd.cartridge.id)
{
fp = fopen(CART_BRAM, "rb");
if (fp != NULL)
{
int filesize = scd.cartridge.mask + 1;
int done = 0;
/* Read into buffer (2k blocks) */
while (filesize > CHUNKSIZE)
{
fread(scd.cartridge.area + done, CHUNKSIZE, 1, fp);
done += CHUNKSIZE;
filesize -= CHUNKSIZE;
}
/* Read remaining bytes */
if (filesize)
{
fread(scd.cartridge.area + done, filesize, 1, fp);
}
/* close file */
fclose(fp);
/* update CRC */
brm_crc[1] = crc32(0, scd.cartridge.area, scd.cartridge.mask + 1);
}
/* check if cartridge backup RAM is correctly formatted */
if (memcmp(scd.cartridge.area + scd.cartridge.mask + 1 - 0x20, brm_format + 0x20, 0x20))
{
/* clear cartridge backup RAM */
memset(scd.cartridge.area, 0x00, scd.cartridge.mask + 1);
/* Cartridge Backup RAM size fields */
brm_format[0x10] = brm_format[0x12] = brm_format[0x14] = brm_format[0x16] = (((scd.cartridge.mask + 1) / 64) - 3) >> 8;
brm_format[0x11] = brm_format[0x13] = brm_format[0x15] = brm_format[0x17] = (((scd.cartridge.mask + 1) / 64) - 3) & 0xff;
/* format cartridge backup RAM */
memcpy(scd.cartridge.area + scd.cartridge.mask + 1 - 0x40, brm_format, 0x40);
}
}
return;
}
if (strlen(rom_filename))
{
slot_load(slot);
}
}
static void slot_autosave(int slot)
{
FILE *fp;
/* Mega CD backup RAM specific */
if (!slot && (system_hw == SYSTEM_MCD))
{
/* verify that internal backup RAM has been modified */
if (crc32(0, scd.bram, 0x2000) != brm_crc[0])
{
/* check if it is correctly formatted before saving */
if (!memcmp(scd.bram + 0x2000 - 0x20, brm_format + 0x20, 0x20))
{
unsigned i = ((region_code ^ 0x40) >> 6) - 1;
const char *path = NULL;
switch(i)
{
case 0:
path = CD_BRAM_JP;
break;
case 1:
path = CD_BRAM_EU;
break;
case 2:
path = CD_BRAM_US;
break;
default:
return;
}
fp = fopen(path, "wb");
if (fp != NULL)
{
fwrite(scd.bram, 0x2000, 1, fp);
fclose(fp);
/* update CRC */
brm_crc[0] = crc32(0, scd.bram, 0x2000);
}
}
}
/* verify that cartridge backup RAM has been modified */
if (scd.cartridge.id && (crc32(0, scd.cartridge.area, scd.cartridge.mask + 1) != brm_crc[1]))
{
/* check if it is correctly formatted before saving */
if (!memcmp(scd.cartridge.area + scd.cartridge.mask + 1 - 0x20, brm_format + 0x20, 0x20))
{
FILE *fp = fopen(CART_BRAM, "wb");
if (fp != NULL)
{
int filesize = scd.cartridge.mask + 1;
int done = 0;
/* Write to file (2k blocks) */
while (filesize > CHUNKSIZE)
{
fwrite(scd.cartridge.area + done, CHUNKSIZE, 1, fp);
done += CHUNKSIZE;
filesize -= CHUNKSIZE;
}
/* Write remaining bytes */
if (filesize)
{
fwrite(scd.cartridge.area + done, filesize, 1, fp);
}
/* Close file */
fclose(fp);
/* update CRC */
brm_crc[1] = crc32(0, scd.cartridge.area, scd.cartridge.mask + 1);
}
}
}
return;
}
if (strlen(rom_filename))
slot_save(slot);
}
/************************************
* libretro implementation
************************************/
static struct retro_system_av_info g_av_info;
void retro_get_system_info(struct retro_system_info *info)
{
info->library_name = "Genesis Plus GX";
info->library_version = "v1.7.0";
info->valid_extensions = "md|smd|bin|cue|gen|zip|MD|SMD|bin|CUE|GEN|ZIP|sms|SMS|gg|GG|sg|SG";
info->nonblock_state = false;
info->block_extract = false;
info->need_fullpath = true;
}
void retro_get_system_av_info(struct retro_system_av_info *info)
{
*info = g_av_info;
}
void retro_set_controller_port_device(unsigned port, unsigned device)
{
(void)port;
(void)device;
}
size_t retro_serialize_size(void) { return STATE_SIZE; }
bool retro_serialize(void *data, size_t size)
{
if (size != STATE_SIZE)
return FALSE;
state_save(data);
return TRUE;
}
bool retro_unserialize(const void *data, size_t size)
{
if (size != STATE_SIZE)
return FALSE;
state_load((uint8_t*)data);
return TRUE;
}
void retro_cheat_reset(void) {}
void retro_cheat_set(unsigned index, bool enabled, const char *code)
{
(void)index;
(void)enabled;
(void)code;
}
static void extract_directory(char *buf, const char *path, size_t size)
{
char *base;
strncpy(buf, path, size - 1);
buf[size - 1] = '\0';
base = strrchr(buf, '/');
if (!base)
base = strrchr(buf, '\\');
if (base)
*base = '\0';
else
buf[0] = '\0';
}
static void retro_set_viewport_dimensions(void)
{
unsigned i;
struct retro_game_geometry geom;
struct retro_system_timing timing;
/* HACK: Emulate 10 dummy frames to figure out the real viewport dimensions of the game. */
if((system_hw & SYSTEM_PBC) == SYSTEM_MD || (system_hw & SYSTEM_PBC) == SYSTEM_MCD)
for (i = 0; i < 10; i++)
system_frame_gen(0);
else
for (i = 0; i < 10; i++)
system_frame_sms(0);
retro_reset();
vwidth = bitmap.viewport.w;
vheight = bitmap.viewport.h;
#if defined(USE_NTSC)
if (config.ntsc)
{
if (system_hw & SYSTEM_MD)
vwidth = MD_NTSC_OUT_WIDTH(vwidth);
else
vwidth = SMS_NTSC_OUT_WIDTH(vwidth);
}
#endif
geom.base_width = vwidth;
geom.base_height = vheight;
geom.max_width = 1024;
geom.max_height = 512;
timing.sample_rate = 44100;
if (vdp_pal)
timing.fps = pal_fps;
else
timing.fps = ntsc_fps;
g_av_info.geometry = geom;
g_av_info.timing = timing;
}
bool retro_load_game(const struct retro_game_info *info)
{
const char *full_path;
const char *dir;
extract_directory(g_rom_dir, info->path, sizeof(g_rom_dir));
if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir)
{
#ifdef _WIN32
const char slash[] = "\\";
#else
const char slash[] = "/";
#endif
snprintf(CD_BRAM_EU, sizeof(CD_BRAM_EU), "%s%sscd_E.brm", dir, slash);
snprintf(CD_BRAM_US, sizeof(CD_BRAM_US), "%s%sscd_U.brm", dir, slash);
snprintf(CD_BRAM_JP, sizeof(CD_BRAM_JP), "%s%sscd_J.brm", dir, slash);
snprintf(CD_BIOS_EU, sizeof(CD_BIOS_EU), "%s%sbios_CD_E.bin", dir, slash);
snprintf(CD_BIOS_US, sizeof(CD_BIOS_US), "%s%sbios_CD_U.bin", dir, slash);
snprintf(CD_BIOS_JP, sizeof(CD_BIOS_JP), "%s%sbios_CD_J.bin", dir, slash);
snprintf(MS_BIOS_EU, sizeof(MS_BIOS_EU), "%s%sbios_E.sms", dir, slash);
snprintf(MS_BIOS_US, sizeof(MS_BIOS_US), "%s%sbios_U.sms", dir, slash);
snprintf(MS_BIOS_JP, sizeof(MS_BIOS_JP), "%s%sbios_J.sms", dir, slash);
snprintf(GG_BIOS, sizeof(GG_BIOS), "%s%sbios.gg", dir, slash);
snprintf(SK_ROM, sizeof(SK_ROM), "%s%ssk.bin", dir, slash);
snprintf(SK_UPMEM, sizeof(SK_UPMEM), "%s%ssk2chip.bin", dir, slash);
snprintf(GG_ROM, sizeof(GG_ROM), "%s%sggenie.bin", dir, slash);
snprintf(AR_ROM, sizeof(AR_ROM), "%s%sareplay.bin", dir, slash);
fprintf(stderr, "Sega CD EU BRAM should be located at: %s\n", CD_BRAM_EU);
fprintf(stderr, "Sega CD US BRAM should be located at: %s\n", CD_BRAM_US);
fprintf(stderr, "Sega CD JP BRAM should be located at: %s\n", CD_BRAM_JP);
fprintf(stderr, "Sega CD EU BIOS should be located at: %s\n", CD_BIOS_EU);
fprintf(stderr, "Sega CD US BIOS should be located at: %s\n", CD_BIOS_US);
fprintf(stderr, "Sega CD JP BIOS should be located at: %s\n", CD_BIOS_JP);
fprintf(stderr, "Master System EU BIOS should be located at: %s\n", MS_BIOS_EU);
fprintf(stderr, "Master System US BIOS should be located at: %s\n", MS_BIOS_US);
fprintf(stderr, "Master System JP BIOS should be located at: %s\n", MS_BIOS_JP);
fprintf(stderr, "Game Gear BIOS should be located at: %s\n", GG_BIOS);
fprintf(stderr, "S&K upmem ROM should be located at: %s\n", SK_UPMEM);
fprintf(stderr, "S&K ROM should be located at: %s\n", SK_ROM);
fprintf(stderr, "Game Genie ROM should be located at: %s\n", GG_ROM);
fprintf(stderr, "Action Replay ROM should be located at: %s\n", AR_ROM);
}
else
{
fprintf(stderr, "[genplus]: Defaulting system directory to %s.\n", g_rom_dir);
dir = g_rom_dir;
}
snprintf(DEFAULT_PATH, sizeof(DEFAULT_PATH), g_rom_dir);
#ifdef _XBOX
snprintf(CART_BRAM, sizeof(CART_BRAM), "%s\\cart.brm", g_rom_dir);
#else
snprintf(CART_BRAM, sizeof(CART_BRAM), "%s/cart.brm", g_rom_dir);
#endif
fprintf(stderr, "BRAM file is located at: %s\n", CART_BRAM);
config_default();
init_bitmap();
full_path = info->path;
if (!load_rom((char*)full_path))
return false;
configure_controls();
init_audio();
system_init();
system_reset();
if (system_hw == SYSTEM_MCD)
slot_autoload(0);
retro_set_viewport_dimensions();
return TRUE;
}
bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
{
(void)game_type;
(void)info;
(void)num_info;
return FALSE;
}
void retro_unload_game(void)
{
if (system_hw == SYSTEM_MCD)
slot_autosave(0);
}
unsigned retro_get_region(void) { return vdp_pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; }
void *retro_get_memory_data(unsigned id)
{
if (!sram.on)
return NULL;
switch (id)
{
case RETRO_MEMORY_SAVE_RAM:
return sram.sram;
default:
return NULL;
}
}
size_t retro_get_memory_size(unsigned id)
{
if (!sram.on)
return 0;
switch (id)
{
case RETRO_MEMORY_SAVE_RAM:
return sram.end - sram.start;
default:
return 0;
}
}
void retro_init(void)
{
unsigned level;
#if defined(USE_NTSC)
sms_ntsc = calloc(1, sizeof(sms_ntsc_t));
md_ntsc = calloc(1, sizeof(md_ntsc_t));
sms_ntsc_init(sms_ntsc, &sms_ntsc_composite);
md_ntsc_init(md_ntsc, &md_ntsc_composite);
#endif
level = 1;
environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
}
void retro_deinit(void)
{
system_shutdown();
#if defined(USE_NTSC)
free(md_ntsc);
free(sms_ntsc);
#endif
}
void retro_reset(void) { gen_reset(0); }
int16 soundbuffer[3068];
void osd_input_update(void)
{
unsigned res[MAX_INPUTS], i, j;
for(i = 0; i < MAX_INPUTS; i++)
res[i] = 0;
if (!input_poll_cb)
return;
input_poll_cb();
switch (input.system[0])
{
case SYSTEM_MS_GAMEPAD:
case SYSTEM_MD_GAMEPAD:
if(input.dev[0] != NO_DEVICE)
{
for (j = 0; j < sizeof(binds) / sizeof(binds[0]); j++)
{
if (input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, binds[j].retro))
res[0] |= binds[j].genesis;
}
input.pad[0] = res[0];
}
break;
case SYSTEM_MOUSE:
break;
case SYSTEM_ACTIVATOR:
break;
case SYSTEM_XE_A1P:
break;
case SYSTEM_WAYPLAY:
break;
case SYSTEM_TEAMPLAYER:
break;
case SYSTEM_LIGHTPHASER:
break;
case SYSTEM_PADDLE:
break;
case SYSTEM_SPORTSPAD:
break;
default:
break;
}
switch (input.system[1])
{
case SYSTEM_MS_GAMEPAD:
case SYSTEM_MD_GAMEPAD:
if(input.dev[4] != NO_DEVICE)
{
for (j = 0; j < sizeof(binds) / sizeof(binds[0]); j++)
{
if (input_state_cb(1, RETRO_DEVICE_JOYPAD, 0, binds[j].retro))
res[1] |= binds[j].genesis;
input.pad[4] = res[1];
}
}
break;
case SYSTEM_MOUSE:
break;
case SYSTEM_ACTIVATOR:
break;
case SYSTEM_XE_A1P:
break;
case SYSTEM_TEAMPLAYER:
break;
case SYSTEM_LIGHTPHASER:
break;
case SYSTEM_PADDLE:
break;
case SYSTEM_SPORTSPAD:
break;
default:
break;
}
if (cart.special & HW_J_CART)
{
for(i = 5; i < 7; i++)
{
for (j = 0; j < sizeof(binds) / sizeof(binds[0]); j++)
{
if (input_state_cb(i-3, RETRO_DEVICE_JOYPAD, 0, binds[j].retro))
res[i-3] |= binds[j].genesis;
input.pad[i] = res[i-3];
}
}
}
}
void retro_run(void)
{
int aud;
if (system_hw == SYSTEM_MCD)
system_frame_scd(0);
else if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
system_frame_gen(0);
else
system_frame_sms(0);
#if defined(USE_NTSC)
video_cb(bitmap_data_ + bitmap.viewport.y * 1024, config.ntsc ? vwidth : bitmap.viewport.w, bitmap.viewport.h, 2048);
#else
video_cb(bitmap_data_ + bitmap.viewport.x + bitmap.viewport.y * 1024, bitmap.viewport.w, bitmap.viewport.h, 2048);
#endif
aud = audio_update(soundbuffer) << 1;
audio_batch_cb(soundbuffer, aud >> 1);
}
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