#include #include #include #include #include #include #include #ifndef WIIU #define AUDIO_FREQUENCY 384000 #else #define AUDIO_FREQUENCY 44100 #endif #define FRAME_RATE (0x400000 / 70224.0) #ifdef _WIN32 #include #include #define snprintf _snprintf #endif #include #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) char battery_save_path[512]; char symbols_path[512]; enum model { MODEL_DMG, MODEL_CGB, MODEL_AGB, MODEL_AUTO }; static enum model model = MODEL_AUTO; static enum model auto_model = MODEL_CGB; enum layout { LAYOUT_TOP_DOWN, LAYOUT_LEFT_RIGHT }; static enum model model[2]; static uint32_t *frame_buf = 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 unsigned layout = 0; signed short soundbuf[1024 * 2]; char retro_system_directory[4096]; char retro_save_directory[4096]; char retro_game_path[4096]; GB_gameboy_t gb[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 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; GB_update_keys_status(gb, 0); audio_callback(gb); } static void vblank2(GB_gameboy_t *gb) { vblank2_occurred = true; GB_update_keys_status(gb, 1); //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(&gb[1]); GB_serial_set_data(&gb[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(&gb[0]); GB_serial_set_data(&gb[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; static const struct retro_variable vars[] = { { "sameboy_link", "Link Cable; disabled|enabled" }, { "sameboy_link_layout", "Screen Layout; top-down|left-right" }, { "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|Game Boy" }, { NULL } }; static const struct retro_variable vars_link[] = { { "sameboy_link", "Link Cable; disabled|enabled" }, { "sameboy_link_layout", "Screen Layout; top-down|left-right" }, { "sameboy_model_1", "Emulated Model for GB #1; Game Boy Color|Game Boy Advance|Game Boy" }, { "sameboy_model_2", "Emulated Model for GB #2; Game Boy Color|Game Boy Advance|Game Boy" }, { "sameboy_color_correction_mode_1", "Color Correction for GB #1; off|correct curves|emulate hardware|preserve brightness" }, { "sameboy_color_correction_mode_2", "Color Correction for GB #2; off|correct curves|emulate hardware|preserve brightness" }, { "sameboy_high_pass_filter_mode_1", "High Pass Filter for GB #1; off|accurate|remove dc offset" }, { "sameboy_high_pass_filter_mode_2", "High Pass Filter for GB #2; off|accurate|remove dc offset" }, { NULL } }; static void init_for_current_model(void) { enum model effective_model = model; if (effective_model == MODEL_AUTO) { effective_model = auto_model; } for (i = 0; i < emulated_devices; i++) { if (GB_is_inited(&gb[i])) GB_switch_model_and_reset(&gb[i], effective_model[i] != MODEL_DMG); else { if (effective_model[i] == MODEL_DMG) GB_init(&gb[i]); else GB_init_cgb(&gb[i]); } const char *model_name = (const char *[]){"dmg", "cgb", "agb"}[model[i]]; const unsigned char *boot_code = (const unsigned char *[]){dmg_boot, cgb_boot, agb_boot}[model[i]]; unsigned boot_length = (unsigned []){dmg_boot_length, cgb_boot_length, agb_boot_length}[model[i]]; char buf[256]; snprintf(buf, sizeof(buf), "%s%c%s_boot.bin", retro_system_directory, slash, model_name); log_cb(RETRO_LOG_INFO, "Loading boot image: %s\n", buf); if (GB_load_boot_rom(&gb[i], buf)) GB_load_boot_rom_from_buffer(&gb[i], boot_code, boot_length); GB_set_user_data(&gb[i], (void*)NULL); GB_set_pixels_output(&gb[i],(unsigned int*)(frame_buf + i * VIDEO_PIXELS)); GB_set_rgb_encode_callback(&gb[i], rgb_encode); GB_set_sample_rate(&gb[i], AUDIO_FREQUENCY); } /* todo: attempt to make these more generic */ GB_set_vblank_callback(&gb[0], (GB_vblank_callback_t) vblank1); if (emulated_devices == 2) { GB_set_vblank_callback(&gb[1], (GB_vblank_callback_t) vblank2); GB_set_serial_transfer_start_callback(&gb[0], serial_start1); GB_set_serial_transfer_end_callback(&gb[0], serial_end1); GB_set_serial_transfer_start_callback(&gb[1], serial_start2); GB_set_serial_transfer_end_callback(&gb[1], serial_end2); } 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(&gb[i], GB_DIRECT_ACCESS_IE, &size, &bank); descs[0].start = 0xFFFF; descs[0].len = 1; descs[1].ptr = GB_get_direct_access(&gb[i], GB_DIRECT_ACCESS_HRAM, &size, &bank); descs[1].start = 0xFF80; descs[1].len = 0x0080; descs[2].ptr = GB_get_direct_access(&gb[i], GB_DIRECT_ACCESS_RAM, &size, &bank); descs[2].start = 0xC000; descs[2].len = 0x2000; descs[3].ptr = GB_get_direct_access(&gb[i], GB_DIRECT_ACCESS_CART_RAM, &size, &bank); descs[3].start = 0xA000; descs[3].len = 0x2000; descs[4].ptr = GB_get_direct_access(&gb[i], GB_DIRECT_ACCESS_VRAM, &size, &bank); descs[4].start = 0x8000; descs[4].len = 0x2000; descs[5].ptr = GB_get_direct_access(&gb[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(&gb[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(&gb[0])) { if (strcmp(var.value, "off") == 0) GB_set_color_correction_mode(&gb[0], GB_COLOR_CORRECTION_DISABLED); else if (strcmp(var.value, "correct curves") == 0) GB_set_color_correction_mode(&gb[0], GB_COLOR_CORRECTION_CORRECT_CURVES); else if (strcmp(var.value, "emulate hardware") == 0) GB_set_color_correction_mode(&gb[0], GB_COLOR_CORRECTION_EMULATE_HARDWARE); else if (strcmp(var.value, "preserve brightness") == 0) GB_set_color_correction_mode(&gb[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(&gb[0], GB_HIGHPASS_OFF); else if (strcmp(var.value, "accurate") == 0) GB_set_highpass_filter_mode(&gb[0], GB_HIGHPASS_ACCURATE); else if (strcmp(var.value, "remove dc offset") == 0) GB_set_highpass_filter_mode(&gb[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 if (strcmp(var.value, "Auto") == 0) new_model = MODEL_AUTO; if (GB_is_inited(&gb[0]) && new_model != model[0]) { model[0] = new_model; init_for_current_model(); } } } else { var.key = "sameboy_color_correction_mode_1"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value && GB_is_cgb(&gb[0])) { if (strcmp(var.value, "off") == 0) GB_set_color_correction_mode(&gb[0], GB_COLOR_CORRECTION_DISABLED); else if (strcmp(var.value, "correct curves") == 0) GB_set_color_correction_mode(&gb[0], GB_COLOR_CORRECTION_CORRECT_CURVES); else if (strcmp(var.value, "emulate hardware") == 0) GB_set_color_correction_mode(&gb[0], GB_COLOR_CORRECTION_EMULATE_HARDWARE); else if (strcmp(var.value, "preserve brightness") == 0) GB_set_color_correction_mode(&gb[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(&gb[1])) { if (strcmp(var.value, "off") == 0) GB_set_color_correction_mode(&gb[1], GB_COLOR_CORRECTION_DISABLED); else if (strcmp(var.value, "correct curves") == 0) GB_set_color_correction_mode(&gb[1], GB_COLOR_CORRECTION_CORRECT_CURVES); else if (strcmp(var.value, "emulate hardware") == 0) GB_set_color_correction_mode(&gb[1], GB_COLOR_CORRECTION_EMULATE_HARDWARE); else if (strcmp(var.value, "preserve brightness") == 0) GB_set_color_correction_mode(&gb[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(&gb[0], GB_HIGHPASS_OFF); else if (strcmp(var.value, "accurate") == 0) GB_set_highpass_filter_mode(&gb[0], GB_HIGHPASS_ACCURATE); else if (strcmp(var.value, "remove dc offset") == 0) GB_set_highpass_filter_mode(&gb[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(&gb[1], GB_HIGHPASS_OFF); else if (strcmp(var.value, "accurate") == 0) GB_set_highpass_filter_mode(&gb[1], GB_HIGHPASS_ACCURATE); else if (strcmp(var.value, "remove dc offset") == 0) GB_set_highpass_filter_mode(&gb[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; if (GB_is_inited(&gb[0]) && new_model != model[0]) { model[0] = new_model; init_for_current_model(); } } var.key = "sameboy_model_2"; 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; if (GB_is_inited(&gb[1]) && new_model != model[0]) { model[0] = new_model; init_for_current_model(); } } } var.key = "sameboy_link"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "enabled") == 0) emulated_devices = 2; else emulated_devices = 1; } var.key = "sameboy_link_layout"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "top-down") == 0) layout = LAYOUT_TOP_DOWN; else layout = LAYOUT_LEFT_RIGHT; } } void retro_init(void) { frame_buf = (uint32_t*)malloc(2 * VIDEO_PIXELS * sizeof(uint32_t)); 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", "."); environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, emulated_devices == 2 ? (void *)vars_link : (void *)vars); check_variables(emulated_devices == 2 ? true : false); } void retro_deinit(void) { free(frame_buf); frame_buf = 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, "Plugging 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 = { VIDEO_WIDTH, VIDEO_HEIGHT * 2, VIDEO_WIDTH, VIDEO_HEIGHT * 2 ,160.0 / 288.0 }; struct retro_system_timing timing = { FRAME_RATE, AUDIO_FREQUENCY }; 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; static const struct retro_controller_description controllers[] = { { "Nintendo Gameboy", RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 0) }, }; static const struct retro_controller_info ports[] = { { controllers, 1 }, { NULL, 0 }, }; cb(RETRO_ENVIRONMENT_SET_CONTROLLER_INFO, (void*)ports); } 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(&gb[i]); } void retro_run(void) { bool updated = false; if (!frame_buf) return; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) check_variables(emulated_devices == 2 ? true : false); vblank1_occurred = vblank2_occurred = false; signed delta = 0; if (emulated_devices == 2) { while (!vblank1_occurred || !vblank2_occurred) { if (delta >= 0) { delta -= GB_run(&gb[0]); } else { delta += GB_run(&gb[1]); } } } else GB_run_frame(&gb[0]); video_cb(frame_buf, VIDEO_WIDTH, VIDEO_HEIGHT * 2, VIDEO_WIDTH * sizeof(uint32_t)); } bool retro_load_game(const struct retro_game_info *info) { 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" }, { 0 }, }; environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc); 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; } snprintf(retro_game_path, sizeof(retro_game_path), "%s", info->path); auto_model = (info->path[strlen(info->path) - 1] & ~0x20) == 'C' ? MODEL_CGB : MODEL_DMG; init_for_current_model(); for (int i = 0; i < emulated_devices; i++) { if (GB_load_rom(&gb[i],info->path)) { log_cb(RETRO_LOG_INFO, "Failed to load ROM\n"); return false; } } bool yes = true; environ_cb(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &yes); 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"); static const struct retro_variable vars[] = { { "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; Auto|Game Boy|Game Boy Color|Game Boy Advance" }, { "sameboy_link", "Link Cable; disabled|enabled" }, { "sameboy_link_layout", "Screen Layout; top-down|left-right" }, { NULL } }; environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, emulated_devices == 2 ? (void *)vars_link : (void *)vars); check_variables(emulated_devices == 2 ? true : false); return true; } void retro_unload_game(void) { for (int i = 0; i < emulated_devices; i++) GB_free(&gb[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) { return false; } size_t retro_serialize_size(void) { size_t size = 0; for (int i = 0; i < emulated_devices; i++) size += GB_get_save_state_size(&gb[i]); return size; } bool retro_serialize(void *data, size_t size) { void* save_data[2]; for (int i = 0; i < emulated_devices; i++) { save_data[i] = (uint8_t*)malloc(size * sizeof(uint8_t) / emulated_devices); GB_save_state_to_buffer(&gb[i], (uint8_t*) save_data[i]); memcpy(data + (size * i / emulated_devices), save_data[i], size / emulated_devices); free(save_data[i]); } if (data) return true; else return false; } bool retro_unserialize(const void *data, size_t size) { void* save_data[2]; int ret; for (int i = 0; i < emulated_devices; i++) { save_data[i] = (uint8_t*)malloc(size * sizeof(uint8_t)/ emulated_devices); memcpy (save_data[i], data + (size * i / emulated_devices), size / emulated_devices); ret = GB_load_state_from_buffer(&gb[i], save_data[i], size / emulated_devices); free(save_data[i]); if (ret != 0) return false; } return true; } void *retro_get_memory_data(unsigned type) { void* data; switch(type) { case RETRO_MEMORY_SYSTEM_RAM: data = gb[0].ram; break; case RETRO_MEMORY_SAVE_RAM: if (gb[0].cartridge_type->has_battery && gb[0].mbc_ram_size != 0) { data = gb[0].mbc_ram; /* let's copy the save to gb[1] so it can save independently */ //memcpy(gb[1].mbc_ram, gb[0].mbc_ram, gb[0].mbc_ram_size); } else data = NULL; break; case RETRO_MEMORY_VIDEO_RAM: data = gb[0].vram; break; case RETRO_MEMORY_RTC: if(gb[0].cartridge_type->has_battery) data = &gb[0].rtc_real; else data = NULL; break; default: data = NULL; } return data; } size_t retro_get_memory_size(unsigned type) { size_t size; switch(type) { case RETRO_MEMORY_SYSTEM_RAM: size = gb[0].ram_size; break; case RETRO_MEMORY_SAVE_RAM: if (gb[0].cartridge_type->has_battery && gb[0].mbc_ram_size != 0) size = gb[0].mbc_ram_size; else size = 0; break; case RETRO_MEMORY_VIDEO_RAM: size = gb[0].vram_size; break; case RETRO_MEMORY_RTC: if(gb[0].cartridge_type->has_battery) size = sizeof (gb[0].rtc_real); else size = 0; break; default: size = 0; 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; }