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SameBoy/libretro/libretro.c

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#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
#include <time.h>
#include <assert.h>
#include <signal.h>
#include <stdarg.h>
#ifndef WIIU
#define AUDIO_FREQUENCY 384000
#else
/* Use the internal sample rate for the Wii U */
#define AUDIO_FREQUENCY 48000
#endif
#define FRAME_RATE (0x400000 / 70224.0)
#ifdef _WIN32
#include <direct.h>
#include <windows.h>
#define snprintf _snprintf
#endif
#include <Core/gb.h>
#include "libretro.h"
#ifdef _WIN32
static const char slash = '\\';
#else
static const char slash = '/';
#endif
#define VIDEO_WIDTH 160
#define VIDEO_HEIGHT 144
#define VIDEO_PIXELS (VIDEO_WIDTH * VIDEO_HEIGHT)
#define RETRO_MEMORY_GAMEBOY_1_SRAM ((1 << 8) | RETRO_MEMORY_SAVE_RAM)
#define RETRO_MEMORY_GAMEBOY_1_RTC ((2 << 8) | RETRO_MEMORY_RTC)
#define RETRO_MEMORY_GAMEBOY_2_SRAM ((3 << 8) | RETRO_MEMORY_SAVE_RAM)
#define RETRO_MEMORY_GAMEBOY_2_RTC ((3 << 8) | RETRO_MEMORY_RTC)
#define RETRO_GAME_TYPE_GAMEBOY_LINK_2P 0x101
char battery_save_path[512];
char symbols_path[512];
enum model {
MODEL_DMG,
MODEL_CGB,
MODEL_AGB,
MODEL_AUTO
};
static const GB_model_t libretro_to_internal_model[] =
{
[MODEL_DMG] = GB_MODEL_DMG_B,
[MODEL_CGB] = GB_MODEL_CGB_E,
[MODEL_AGB] = GB_MODEL_AGB
};
enum screen_layout {
LAYOUT_TOP_DOWN,
LAYOUT_LEFT_RIGHT
};
enum audio_out {
GB_1,
GB_2
};
enum mode{
MODE_SINGLE_GAME,
MODE_SINGLE_GAME_DUAL,
MODE_DUAL_GAME
};
static enum model model[2];
static enum model auto_model = MODEL_CGB;
static uint32_t *frame_buf = NULL;
static uint32_t *frame_buf_copy = NULL;
static struct retro_log_callback logging;
static retro_log_printf_t log_cb;
static retro_video_refresh_t video_cb;
static retro_audio_sample_batch_t audio_batch_cb;
static retro_input_poll_t input_poll_cb;
static retro_input_state_t input_state_cb;
static unsigned emulated_devices = 1;
static bool initialized = false;
static unsigned screen_layout = 0;
static unsigned audio_out = 0;
static enum mode mode = MODE_SINGLE_GAME;
static bool geometry_updated = false;
static bool sameboy_dual = false;
static bool link_cable_emulation = false;
/*static bool infrared_emulation = false;*/
signed short soundbuf[1024 * 2];
char retro_system_directory[4096];
char retro_save_directory[4096];
char retro_game_path[4096];
GB_gameboy_t gameboy[2];
extern const unsigned char dmg_boot[], cgb_boot[], agb_boot[];
extern const unsigned dmg_boot_length, cgb_boot_length, agb_boot_length;
bool vblank1_occurred = false, vblank2_occurred = false;
static void fallback_log(enum retro_log_level level, const char *fmt, ...)
{
(void)level;
va_list va;
va_start(va, fmt);
vfprintf(stderr, fmt, va);
va_end(va);
}
static struct retro_rumble_interface rumble;
static void extract_basename(char *buf, const char *path, size_t size)
{
const char *base = strrchr(path, '/');
if (!base)
base = strrchr(path, '\\');
if (!base)
base = path;
if (*base == '\\' || *base == '/')
base++;
strncpy(buf, base, size - 1);
buf[size - 1] = '\0';
char *ext = strrchr(buf, '.');
if (ext)
*ext = '\0';
}
static void GB_update_keys_status(GB_gameboy_t *gb, unsigned port)
{
input_poll_cb();
GB_set_key_state(gb, GB_KEY_RIGHT,input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT));
GB_set_key_state(gb, GB_KEY_LEFT, input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT));
GB_set_key_state(gb, GB_KEY_UP,input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP) );
GB_set_key_state(gb, GB_KEY_DOWN,input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN));
GB_set_key_state(gb, GB_KEY_A,input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A) );
GB_set_key_state(gb, GB_KEY_B,input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B) );
GB_set_key_state(gb, GB_KEY_SELECT,input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT));
GB_set_key_state(gb, GB_KEY_START,input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START) );
if (gb->rumble_state)
rumble.set_rumble_state(port, RETRO_RUMBLE_STRONG, 65535);
else
rumble.set_rumble_state(port, RETRO_RUMBLE_STRONG, 0);
}
static void audio_callback(void *gb)
{
size_t length = GB_apu_get_current_buffer_length(gb);
while (length > sizeof(soundbuf) / 4)
{
GB_apu_copy_buffer(gb, (GB_sample_t *) soundbuf, 1024);
audio_batch_cb(soundbuf, 1024);
length -= 1024;
}
if (length) {
GB_apu_copy_buffer(gb, (GB_sample_t *) soundbuf, length);
audio_batch_cb(soundbuf, length);
}
}
static void vblank1(GB_gameboy_t *gb)
{
vblank1_occurred = true;
if (audio_out == GB_1)
audio_callback(gb);
}
static void vblank2(GB_gameboy_t *gb)
{
vblank2_occurred = true;
if (audio_out == GB_2)
audio_callback(gb);
}
static uint8_t byte_to_send1 = 0xFF, byte_to_send2 = 0xFF;
static void serial_start1(GB_gameboy_t *gb, uint8_t byte_received)
{
byte_to_send1 = byte_received;
}
static uint8_t serial_end1(GB_gameboy_t *gb)
{
uint8_t ret = GB_serial_get_data(&gameboy[1]);
GB_serial_set_data(&gameboy[1], byte_to_send1);
return ret;
}
static void serial_start2(GB_gameboy_t *gb, uint8_t byte_received)
{
byte_to_send2 = byte_received;
}
static uint8_t serial_end2(GB_gameboy_t *gb)
{
uint8_t ret = GB_serial_get_data(&gameboy[0]);
GB_serial_set_data(&gameboy[0], byte_to_send2);
return ret;
}
static uint32_t rgb_encode(GB_gameboy_t *gb, uint8_t r, uint8_t g, uint8_t b)
{
return r<<16|g<<8|b;
}
static retro_environment_t environ_cb;
/* variables for single cart mode */
static const struct retro_variable vars_single[] = {
{ "sameboy_dual", "Single cart dual mode (reload); disabled|enabled" },
{ "sameboy_color_correction_mode", "Color correction; off|correct curves|emulate hardware|preserve brightness" },
{ "sameboy_high_pass_filter_mode", "High-pass filter; off|accurate|remove dc offset" },
{ "sameboy_model", "Emulated model; Game Boy Color|Game Boy Advance|Auto|Game Boy" },
{ NULL }
};
/* variables for single cart dual gameboy mode */
static const struct retro_variable vars_single_dual[] = {
{ "sameboy_dual", "Single cart dual mode (reload); disabled|enabled" },
{ "sameboy_link", "Link cable emulation; enabled|disabled" },
/*{ "sameboy_ir", "Infrared Sensor Emulation; disabled|enabled" },*/
{ "sameboy_screen_layout", "Screen layout; top-down|left-right" },
{ "sameboy_audio_output", "Audio output; Game Boy #1|Game Boy #2" },
{ "sameboy_model_1", "Emulated model for Game Boy #1; Game Boy Color|Game Boy Advance|Auto|Game Boy" },
{ "sameboy_model_2", "Emulated model for Game Boy #2; Game Boy Color|Game Boy Advance|Auto|Game Boy" },
{ "sameboy_color_correction_mode_1", "Color correction for Game Boy #1; off|correct curves|emulate hardware|preserve brightness" },
{ "sameboy_color_correction_mode_2", "Color correction for Game Boy #2; off|correct curves|emulate hardware|preserve brightness" },
{ "sameboy_high_pass_filter_mode_1", "High-pass filter for Game Boy #1; off|accurate|remove dc offset" },
{ "sameboy_high_pass_filter_mode_2", "High-pass filter for Game Boy #2; off|accurate|remove dc offset" },
{ NULL }
};
/* variables for dual cart dual gameboy mode */
static const struct retro_variable vars_dual[] = {
{ "sameboy_link", "Link cable emulation; enabled|disabled" },
/*{ "sameboy_ir", "Infrared Sensor Emulation; disabled|enabled" },*/
{ "sameboy_screen_layout", "Screen layout; top-down|left-right" },
{ "sameboy_audio_output", "Audio output; Game Boy #1|Game Boy #2" },
{ "sameboy_model_1", "Emulated model for Game Boy #1; Game Boy Color|Game Boy Advance|Auto|Game Boy" },
{ "sameboy_model_2", "Emulated model for Game Boy #2; Game Boy Color|Game Boy Advance|Auto|Game Boy" },
{ "sameboy_color_correction_mode_1", "Color correction for Game Boy #1; off|correct curves|emulate hardware|preserve brightness" },
{ "sameboy_color_correction_mode_2", "Color correction for Game Boy #2; off|correct curves|emulate hardware|preserve brightness" },
{ "sameboy_high_pass_filter_mode_1", "High-pass filter for Game Boy #1; off|accurate|remove dc offset" },
{ "sameboy_high_pass_filter_mode_2", "High-pass filter for Game Boy #2; off|accurate|remove dc offset" },
{ NULL }
};
static const struct retro_subsystem_memory_info gb1_memory[] = {
{ "srm", RETRO_MEMORY_GAMEBOY_1_SRAM },
{ "rtc", RETRO_MEMORY_GAMEBOY_1_RTC },
};
static const struct retro_subsystem_memory_info gb2_memory[] = {
{ "srm", RETRO_MEMORY_GAMEBOY_2_SRAM },
{ "rtc", RETRO_MEMORY_GAMEBOY_2_RTC },
};
static const struct retro_subsystem_rom_info gb_roms[] = {
{ "GameBoy #1", "gb|gbc", true, false, true, gb1_memory, 1 },
{ "GameBoy #2", "gb|gbc", true, false, true, gb2_memory, 1 },
};
static const struct retro_subsystem_info subsystems[] = {
{ "2 Player Game Boy Link", "gb_link_2p", gb_roms, 2, RETRO_GAME_TYPE_GAMEBOY_LINK_2P },
{ NULL },
};
static const struct retro_controller_description controllers[] = {
{ "Nintendo Game Boy", RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 0) },
};
static void set_link_cable_state(bool state)
{
if (state && emulated_devices == 2)
{
GB_set_serial_transfer_start_callback(&gameboy[0], serial_start1);
GB_set_serial_transfer_end_callback(&gameboy[0], serial_end1);
GB_set_serial_transfer_start_callback(&gameboy[1], serial_start2);
GB_set_serial_transfer_end_callback(&gameboy[1], serial_end2);
}
else if (!state)
{
GB_set_serial_transfer_start_callback(&gameboy[0], NULL);
GB_set_serial_transfer_end_callback(&gameboy[0], NULL);
GB_set_serial_transfer_start_callback(&gameboy[1], NULL);
GB_set_serial_transfer_end_callback(&gameboy[1], NULL);
}
}
static void init_for_current_model(unsigned id)
{
unsigned i = id;
enum model effective_model;
effective_model = model[i];
if (effective_model == MODEL_AUTO) {
effective_model = auto_model;
}
if (GB_is_inited(&gameboy[i])) {
GB_switch_model_and_reset(&gameboy[i], libretro_to_internal_model[effective_model]);
}
else {
GB_init(&gameboy[i], libretro_to_internal_model[effective_model]);
}
const char *model_name = (const char *[]){"dmg", "cgb", "agb"}[effective_model];
const unsigned char *boot_code = (const unsigned char *[]){dmg_boot, cgb_boot, agb_boot}[effective_model];
unsigned boot_length = (unsigned []){dmg_boot_length, cgb_boot_length, agb_boot_length}[effective_model];
char buf[256];
snprintf(buf, sizeof(buf), "%s%c%s_boot.bin", retro_system_directory, slash, model_name);
log_cb(RETRO_LOG_INFO, "Initializing as model: %s\n", model_name);
log_cb(RETRO_LOG_INFO, "Loading boot image: %s\n", buf);
if (GB_load_boot_rom(&gameboy[i], buf))
GB_load_boot_rom_from_buffer(&gameboy[i], boot_code, boot_length);
GB_set_user_data(&gameboy[i], (void*)NULL);
GB_set_pixels_output(&gameboy[i],(unsigned int*)(frame_buf + i * VIDEO_PIXELS));
GB_set_rgb_encode_callback(&gameboy[i], rgb_encode);
GB_set_sample_rate(&gameboy[i], AUDIO_FREQUENCY);
/* todo: attempt to make these more generic */
GB_set_vblank_callback(&gameboy[0], (GB_vblank_callback_t) vblank1);
if (emulated_devices == 2)
{
GB_set_vblank_callback(&gameboy[1], (GB_vblank_callback_t) vblank2);
if (link_cable_emulation)
set_link_cable_state(true);
}
struct retro_memory_descriptor descs[7];
size_t size;
uint16_t bank;
/* todo: add netplay awareness for this so achievements can be granted on the respective client */
i = 0;
memset(descs, 0, sizeof(descs));
descs[0].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_IE, &size, &bank);
descs[0].start = 0xFFFF;
descs[0].len = 1;
descs[1].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_HRAM, &size, &bank);
descs[1].start = 0xFF80;
descs[1].len = 0x0080;
descs[2].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_RAM, &size, &bank);
descs[2].start = 0xC000;
descs[2].len = 0x2000;
descs[3].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_CART_RAM, &size, &bank);
descs[3].start = 0xA000;
descs[3].len = 0x2000;
descs[4].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_VRAM, &size, &bank);
descs[4].start = 0x8000;
descs[4].len = 0x2000;
descs[5].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_ROM, &size, &bank);
descs[5].start = 0x0000;
descs[5].len = 0x4000;
descs[5].flags = RETRO_MEMDESC_CONST;
descs[6].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_OAM, &size, &bank);
descs[6].start = 0xFE00;
descs[6].len = 0x00A0;
struct retro_memory_map mmaps;
mmaps.descriptors = descs;
mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
environ_cb(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
}
static void check_variables(bool link)
{
struct retro_variable var = {0};
if (!link)
{
var.key = "sameboy_color_correction_mode";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value && GB_is_cgb(&gameboy[0]))
{
if (strcmp(var.value, "off") == 0)
GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_DISABLED);
else if (strcmp(var.value, "correct curves") == 0)
GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_CORRECT_CURVES);
else if (strcmp(var.value, "emulate hardware") == 0)
GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_EMULATE_HARDWARE);
else if (strcmp(var.value, "preserve brightness") == 0)
GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_PRESERVE_BRIGHTNESS);
}
var.key = "sameboy_high_pass_filter_mode";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (strcmp(var.value, "off") == 0)
GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_OFF);
else if (strcmp(var.value, "accurate") == 0)
GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_ACCURATE);
else if (strcmp(var.value, "remove dc offset") == 0)
GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_REMOVE_DC_OFFSET);
}
var.key = "sameboy_model";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
enum model new_model = model[0];
if (strcmp(var.value, "Game Boy") == 0)
new_model = MODEL_DMG;
else if (strcmp(var.value, "Game Boy Color") == 0)
new_model = MODEL_CGB;
else if (strcmp(var.value, "Game Boy Advance") == 0)
new_model = MODEL_AGB;
else
new_model = MODEL_AUTO;
model[0] = new_model;
init_for_current_model(0);
}
}
else
{
var.key = "sameboy_color_correction_mode_1";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value && GB_is_cgb(&gameboy[0]))
{
if (strcmp(var.value, "off") == 0)
GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_DISABLED);
else if (strcmp(var.value, "correct curves") == 0)
GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_CORRECT_CURVES);
else if (strcmp(var.value, "emulate hardware") == 0)
GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_EMULATE_HARDWARE);
else if (strcmp(var.value, "preserve brightness") == 0)
GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_PRESERVE_BRIGHTNESS);
}
var.key = "sameboy_color_correction_mode_2";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value && GB_is_cgb(&gameboy[1]))
{
if (strcmp(var.value, "off") == 0)
GB_set_color_correction_mode(&gameboy[1], GB_COLOR_CORRECTION_DISABLED);
else if (strcmp(var.value, "correct curves") == 0)
GB_set_color_correction_mode(&gameboy[1], GB_COLOR_CORRECTION_CORRECT_CURVES);
else if (strcmp(var.value, "emulate hardware") == 0)
GB_set_color_correction_mode(&gameboy[1], GB_COLOR_CORRECTION_EMULATE_HARDWARE);
else if (strcmp(var.value, "preserve brightness") == 0)
GB_set_color_correction_mode(&gameboy[1], GB_COLOR_CORRECTION_PRESERVE_BRIGHTNESS);
}
var.key = "sameboy_high_pass_filter_mode_1";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (strcmp(var.value, "off") == 0)
GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_OFF);
else if (strcmp(var.value, "accurate") == 0)
GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_ACCURATE);
else if (strcmp(var.value, "remove dc offset") == 0)
GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_REMOVE_DC_OFFSET);
}
var.key = "sameboy_high_pass_filter_mode_2";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (strcmp(var.value, "off") == 0)
GB_set_highpass_filter_mode(&gameboy[1], GB_HIGHPASS_OFF);
else if (strcmp(var.value, "accurate") == 0)
GB_set_highpass_filter_mode(&gameboy[1], GB_HIGHPASS_ACCURATE);
else if (strcmp(var.value, "remove dc offset") == 0)
GB_set_highpass_filter_mode(&gameboy[1], GB_HIGHPASS_REMOVE_DC_OFFSET);
}
var.key = "sameboy_model_1";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
enum model new_model = model[0];
if (strcmp(var.value, "Game Boy") == 0)
new_model = MODEL_DMG;
else if (strcmp(var.value, "Game Boy Color") == 0)
new_model = MODEL_CGB;
else if (strcmp(var.value, "Game Boy Advance") == 0)
new_model = MODEL_AGB;
else
new_model = MODEL_AUTO;
if (model[0] != new_model)
{
model[0] = new_model;
init_for_current_model(0);
}
}
var.key = "sameboy_model_2";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
enum model new_model = model[1];
if (strcmp(var.value, "Game Boy") == 0)
new_model = MODEL_DMG;
else if (strcmp(var.value, "Game Boy Color") == 0)
new_model = MODEL_CGB;
else if (strcmp(var.value, "Game Boy Advance") == 0)
new_model = MODEL_AGB;
else
new_model = MODEL_AUTO;
if (model[1] != new_model)
{
model[1] = new_model;
init_for_current_model(1);
}
}
}
var.key = "sameboy_screen_layout";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (strcmp(var.value, "top-down") == 0)
screen_layout = LAYOUT_TOP_DOWN;
else
screen_layout = LAYOUT_LEFT_RIGHT;
geometry_updated = true;
}
var.key = "sameboy_dual";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (strcmp(var.value, "enabled") == 0)
sameboy_dual = true;
else
sameboy_dual = false;
}
var.key = "sameboy_link";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
bool tmp = link_cable_emulation;
if (strcmp(var.value, "enabled") == 0)
link_cable_emulation = true;
else
link_cable_emulation = false;
if (link_cable_emulation && link_cable_emulation != tmp)
set_link_cable_state(true);
else if (!link_cable_emulation && link_cable_emulation != tmp)
set_link_cable_state(false);
}
var.key = "sameboy_audio_output";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (strcmp(var.value, "Game Boy #1") == 0)
audio_out = GB_1;
else
audio_out = GB_2;
}
}
void retro_init(void)
{
const char *dir = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir)
snprintf(retro_system_directory, sizeof(retro_system_directory), "%s", dir);
else
snprintf(retro_system_directory, sizeof(retro_system_directory), "%s", ".");
if (environ_cb(RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY, &dir) && dir)
snprintf(retro_save_directory, sizeof(retro_save_directory), "%s", dir);
else
snprintf(retro_save_directory, sizeof(retro_save_directory), "%s", ".");
static const struct retro_controller_info ports[] = {
{ controllers, 1 },
{ controllers, 1 },
{ NULL, 0 },
};
environ_cb(RETRO_ENVIRONMENT_SET_CONTROLLER_INFO, (void*)ports);
struct retro_input_descriptor desc[] = {
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 0 },
};
environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
}
void retro_deinit(void)
{
free(frame_buf);
free(frame_buf_copy);
frame_buf = NULL;
frame_buf_copy = NULL;
}
unsigned retro_api_version(void)
{
return RETRO_API_VERSION;
}
void retro_set_controller_port_device(unsigned port, unsigned device)
{
log_cb(RETRO_LOG_INFO, "Connecting device %u into port %u\n", device, port);
}
void retro_get_system_info(struct retro_system_info *info)
{
memset(info, 0, sizeof(*info));
info->library_name = "SameBoy";
#ifdef GIT_VERSION
info->library_version = SAMEBOY_CORE_VERSION GIT_VERSION;
#else
info->library_version = SAMEBOY_CORE_VERSION;
#endif
info->need_fullpath = true;
info->valid_extensions = "gb|gbc";
}
void retro_get_system_av_info(struct retro_system_av_info *info)
{
struct retro_game_geometry geom;
struct retro_system_timing timing = { FRAME_RATE, AUDIO_FREQUENCY };
if (screen_layout == LAYOUT_TOP_DOWN) {
geom.base_width = VIDEO_WIDTH;
geom.base_height = VIDEO_HEIGHT * emulated_devices;
geom.aspect_ratio = (double)VIDEO_WIDTH / (emulated_devices * VIDEO_HEIGHT);
}else if (screen_layout == LAYOUT_LEFT_RIGHT) {
geom.base_width = VIDEO_WIDTH * emulated_devices;
geom.base_height = VIDEO_HEIGHT;
geom.aspect_ratio = ((double)VIDEO_WIDTH * emulated_devices) / VIDEO_HEIGHT;
}
geom.max_width = VIDEO_WIDTH * emulated_devices;
geom.max_height = VIDEO_HEIGHT * emulated_devices;
info->geometry = geom;
info->timing = timing;
}
void retro_set_environment(retro_environment_t cb)
{
environ_cb = cb;
if (cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &logging))
log_cb = logging.log;
else
log_cb = fallback_log;
cb(RETRO_ENVIRONMENT_SET_SUBSYSTEM_INFO, (void*)subsystems);
}
void retro_set_audio_sample(retro_audio_sample_t 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;
}
void retro_set_video_refresh(retro_video_refresh_t cb)
{
video_cb = cb;
}
void retro_reset(void)
{
for (int i = 0; i < emulated_devices; i++)
GB_reset(&gameboy[i]);
}
void retro_run(void)
{
bool updated = false;
if (!initialized)
geometry_updated = false;
if (geometry_updated) {
struct retro_system_av_info info;
retro_get_system_av_info(&info);
geometry_updated = false;
environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &info.geometry);
}
if (!frame_buf)
return;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
check_variables(emulated_devices == 2 ? true : false);
GB_update_keys_status(&gameboy[0], 0);
if (emulated_devices == 2)
GB_update_keys_status(&gameboy[1], 1);
vblank1_occurred = vblank2_occurred = false;
signed delta = 0;
if (emulated_devices == 2)
{
while (!vblank1_occurred || !vblank2_occurred) {
if (delta >= 0) {
delta -= GB_run(&gameboy[0]);
}
else {
delta += GB_run(&gameboy[1]);
}
}
}
else
GB_run_frame(&gameboy[0]);
if (screen_layout == LAYOUT_TOP_DOWN) {
video_cb(frame_buf, VIDEO_WIDTH, VIDEO_HEIGHT * emulated_devices, VIDEO_WIDTH * sizeof(uint32_t));
}else if (screen_layout == LAYOUT_LEFT_RIGHT) {
/* use slow memcpy method for now */
for (int index = 0; index < emulated_devices; index++) {
for (int y = 0; y < VIDEO_HEIGHT; y++) {
for (int x = 0; x < VIDEO_WIDTH; x++) {
frame_buf_copy[VIDEO_WIDTH * emulated_devices * y + (x + VIDEO_WIDTH * index)] = frame_buf[VIDEO_WIDTH * (y + VIDEO_HEIGHT * index) + x];
}
}
}
video_cb(frame_buf_copy, VIDEO_WIDTH * emulated_devices, VIDEO_HEIGHT, VIDEO_WIDTH * emulated_devices * sizeof(uint32_t));
}
initialized = true;
}
bool retro_load_game(const struct retro_game_info *info)
{
environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars_single);
check_variables(false);
if (sameboy_dual)
{
emulated_devices = 2;
mode = MODE_SINGLE_GAME_DUAL;
environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars_single_dual);
check_variables(true);
}
else
mode = MODE_SINGLE_GAME;
frame_buf = (uint32_t*)malloc(emulated_devices * VIDEO_PIXELS * sizeof(uint32_t));
frame_buf_copy = (uint32_t*)malloc(emulated_devices * VIDEO_PIXELS * sizeof(uint32_t));
memset(frame_buf, 0, emulated_devices * VIDEO_PIXELS * sizeof(uint32_t));
memset(frame_buf_copy, 0, emulated_devices * VIDEO_PIXELS * sizeof(uint32_t));
enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_XRGB8888;
if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt))
{
log_cb(RETRO_LOG_INFO, "XRGB8888 is not supported\n");
return false;
}
auto_model = (info->path[strlen(info->path) - 1] & ~0x20) == 'C' ? MODEL_CGB : MODEL_DMG;
snprintf(retro_game_path, sizeof(retro_game_path), "%s", info->path);
for (int i = 0; i < emulated_devices; i++)
{
init_for_current_model(i);
if (GB_load_rom(&gameboy[i],info->path))
{
log_cb(RETRO_LOG_INFO, "Failed to load ROM at %s\n", info->path);
return false;
}
}
bool achievements = true;
environ_cb(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &achievements);
if (environ_cb(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumble))
log_cb(RETRO_LOG_INFO, "Rumble environment supported\n");
else
log_cb(RETRO_LOG_INFO, "Rumble environment not supported\n");
check_variables(emulated_devices == 2 ? true : false);
/* hack: use upstream's file based I/O for Game Boy 2 battery in single cart mode */
if (mode == MODE_SINGLE_GAME_DUAL)
{
char path[PATH_MAX];
char file[PATH_MAX];
extract_basename(file, retro_game_path, sizeof(file));
snprintf (path, sizeof(path), "%s%c%s.srm.2", retro_save_directory, slash, file);
log_cb(RETRO_LOG_INFO, "Loading battery for Game Boy 2 from: %s\n", path);
GB_load_battery(&gameboy[1], path);
}
return true;
}
void retro_unload_game(void)
{
/* hack: use upstream's file based I/O for Game Boy 2 battery in single cart mode */
if (mode == MODE_SINGLE_GAME_DUAL)
{
char path[PATH_MAX];
char file[PATH_MAX];
extract_basename(file, retro_game_path, sizeof(file));
snprintf (path, sizeof(path), "%s%c%s.srm.2", retro_save_directory, slash, file);
log_cb(RETRO_LOG_INFO, "Saving battery for Game Boy 2 to: %s\n", path);
GB_save_battery(&gameboy[1], path);
}
for (int i = 0; i < emulated_devices; i++)
GB_free(&gameboy[i]);
}
unsigned retro_get_region(void)
{
return RETRO_REGION_NTSC;
}
bool retro_load_game_special(unsigned type, const struct retro_game_info *info, size_t num_info)
{
if (type == RETRO_GAME_TYPE_GAMEBOY_LINK_2P)
{
emulated_devices = 2;
mode = MODE_DUAL_GAME;
}
else
return false; /* all other types are unhandled for now */
environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars_dual);
check_variables(true);
frame_buf = (uint32_t*)malloc(emulated_devices * VIDEO_PIXELS * sizeof(uint32_t));
frame_buf_copy = (uint32_t*)malloc(emulated_devices * VIDEO_PIXELS * sizeof(uint32_t));
memset(frame_buf, 0, emulated_devices * VIDEO_PIXELS * sizeof(uint32_t));
memset(frame_buf_copy, 0, emulated_devices * VIDEO_PIXELS * sizeof(uint32_t));
enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_XRGB8888;
if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt))
{
log_cb(RETRO_LOG_INFO, "XRGB8888 is not supported\n");
return false;
}
auto_model = (info->path[strlen(info->path) - 1] & ~0x20) == 'C' ? MODEL_CGB : MODEL_DMG;
snprintf(retro_game_path, sizeof(retro_game_path), "%s", info->path);
for (int i = 0; i < emulated_devices; i++)
{
init_for_current_model(i);
if (GB_load_rom(&gameboy[i], info[i].path))
{
log_cb(RETRO_LOG_INFO, "Failed to load ROM\n");
return false;
}
}
bool achievements = true;
environ_cb(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &achievements);
if (environ_cb(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumble))
log_cb(RETRO_LOG_INFO, "Rumble environment supported\n");
else
log_cb(RETRO_LOG_INFO, "Rumble environment not supported\n");
check_variables(emulated_devices == 2 ? true : false);
return true;
}
size_t retro_serialize_size(void)
{
if (emulated_devices == 2)
return GB_get_save_state_size(&gameboy[0]) + GB_get_save_state_size(&gameboy[1]);
else
return GB_get_save_state_size(&gameboy[0]);
}
bool retro_serialize(void *data, size_t size)
{
if (!initialized)
return false;
void* save_data[2];
size_t state_size[2];
size_t offset = 0;
for (int i = 0; i < emulated_devices; i++)
{
state_size[i] = GB_get_save_state_size(&gameboy[i]);
save_data[i] = (uint8_t*)malloc(state_size[i]);
GB_save_state_to_buffer(&gameboy[i], (uint8_t*) save_data[i]);
memcpy(data + offset, save_data[i], state_size[i]);
offset += state_size[i];
free(save_data[i]);
}
if (data)
return true;
else
return false;
}
bool retro_unserialize(const void *data, size_t size)
{
void* save_data[2];
size_t state_size[2];
int ret;
for (int i = 0; i < emulated_devices; i++)
{
state_size[i] = GB_get_save_state_size(&gameboy[i]);
save_data[i] = (uint8_t*)malloc(state_size[i]);
memcpy (save_data[i], data + (state_size[i] * i), state_size[i]);
ret = GB_load_state_from_buffer(&gameboy[i], save_data[i], state_size[i]);
free(save_data[i]);
if (ret != 0)
return false;
}
return true;
}
void *retro_get_memory_data(unsigned type)
{
void* data = NULL;
switch(mode)
{
case MODE_SINGLE_GAME:
case MODE_SINGLE_GAME_DUAL: /* todo: hook this properly */
{
switch(type)
{
case RETRO_MEMORY_SYSTEM_RAM:
data = gameboy[0].ram;
break;
case RETRO_MEMORY_SAVE_RAM:
if (gameboy[0].cartridge_type->has_battery && gameboy[0].mbc_ram_size != 0)
data = gameboy[0].mbc_ram;
else
data = NULL;
break;
case RETRO_MEMORY_VIDEO_RAM:
data = gameboy[0].vram;
break;
case RETRO_MEMORY_RTC:
if(gameboy[0].cartridge_type->has_battery)
data = &gameboy[0].rtc_real;
else
data = NULL;
break;
default:
break;
}
}
break;
case MODE_DUAL_GAME:
{
switch (type)
{
case RETRO_MEMORY_GAMEBOY_1_SRAM:
if (gameboy[0].cartridge_type->has_battery && gameboy[0].mbc_ram_size != 0)
data = gameboy[0].mbc_ram;
else
data = NULL;
break;
case RETRO_MEMORY_GAMEBOY_2_SRAM:
if (gameboy[1].cartridge_type->has_battery && gameboy[1].mbc_ram_size != 0)
data = gameboy[1].mbc_ram;
else
data = NULL;
break;
case RETRO_MEMORY_GAMEBOY_1_RTC:
if(gameboy[0].cartridge_type->has_battery)
data = &gameboy[0].rtc_real;
else
data = NULL;
break;
case RETRO_MEMORY_GAMEBOY_2_RTC:
if(gameboy[1].cartridge_type->has_battery)
data = &gameboy[1].rtc_real;
else
data = NULL;
break;
default:
break;
}
}
break;
default:
break;
}
return data;
}
size_t retro_get_memory_size(unsigned type)
{
size_t size = 0;
switch(mode)
{
case MODE_SINGLE_GAME:
case MODE_SINGLE_GAME_DUAL: /* todo: hook this properly */
{
switch(type)
{
case RETRO_MEMORY_SYSTEM_RAM:
size = gameboy[0].ram_size;
break;
case RETRO_MEMORY_SAVE_RAM:
if (gameboy[0].cartridge_type->has_battery && gameboy[0].mbc_ram_size != 0)
size = gameboy[0].mbc_ram_size;
else
size = 0;
break;
case RETRO_MEMORY_VIDEO_RAM:
size = gameboy[0].vram_size;
break;
case RETRO_MEMORY_RTC:
if(gameboy[0].cartridge_type->has_battery)
size = sizeof (gameboy[0].rtc_real);
else
size = 0;
break;
default:
break;
}
}
break;
case MODE_DUAL_GAME:
{
switch (type)
{
case RETRO_MEMORY_GAMEBOY_1_SRAM:
if (gameboy[0].cartridge_type->has_battery && gameboy[0].mbc_ram_size != 0)
size = gameboy[0].mbc_ram_size;
else
size = 0;
break;
case RETRO_MEMORY_GAMEBOY_2_SRAM:
if (gameboy[1].cartridge_type->has_battery && gameboy[1].mbc_ram_size != 0)
size = gameboy[1].mbc_ram_size;
else
size = 0;
break;
case RETRO_MEMORY_GAMEBOY_1_RTC:
if(gameboy[0].cartridge_type->has_battery)
size = sizeof (gameboy[0].rtc_real);
break;
case RETRO_MEMORY_GAMEBOY_2_RTC:
if(gameboy[1].cartridge_type->has_battery)
size = sizeof (gameboy[1].rtc_real);
break;
default:
break;
}
}
break;
default:
break;
}
return size;
}
void retro_cheat_reset(void)
{}
void retro_cheat_set(unsigned index, bool enabled, const char *code)
{
(void)index;
(void)enabled;
(void)code;
}
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