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49a8cd0bb5
SameBoy/libretro/libretro.c
radius 49a8cd0bb5 hook up savestates for GB#2
2018-02-05 19:06:23 -05:00

664 lines
19 KiB
C
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#include <stdio.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
#define AUDIO_FREQUENCY 44100
#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)
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;
static uint32_t *frame_buf;
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;
signed short soundbuf[1024 * 2];
char retro_system_directory[4096];
char retro_save_directory[4096];
char retro_game_path[4096];
GB_gameboy_t gb1;
GB_gameboy_t gb2;
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 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;
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", ".");
}
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)
{
GB_reset(&gb1);
GB_reset(&gb2);
}
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(&gb2);
GB_serial_set_data(&gb2, 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(&gb1);
GB_serial_set_data(&gb1, byte_to_send2);
return ret;
}
static void init_for_current_model(void)
{
enum model effective_model = model;
if (effective_model == MODEL_AUTO) {
effective_model = auto_model;
}
if (GB_is_inited(&gb1)) {
GB_switch_model_and_reset(&gb1, effective_model != MODEL_DMG);
}
else {
if (effective_model == MODEL_DMG) {
GB_init(&gb1);
}
else {
GB_init_cgb(&gb1);
}
}
if (GB_is_inited(&gb2)) {
GB_switch_model_and_reset(&gb2, effective_model != MODEL_DMG);
}
else {
if (effective_model == MODEL_DMG) {
GB_init(&gb2);
}
else {
GB_init_cgb(&gb2);
}
}
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, "Loading boot image: %s\n", buf);
if (GB_load_boot_rom(&gb1, buf)) {
GB_load_boot_rom_from_buffer(&gb1, boot_code, boot_length);
}
if (GB_load_boot_rom(&gb2, buf)) {
GB_load_boot_rom_from_buffer(&gb2, boot_code, boot_length);
}
GB_set_vblank_callback(&gb1, (GB_vblank_callback_t) vblank1);
GB_set_vblank_callback(&gb2, (GB_vblank_callback_t) vblank2);
GB_set_user_data(&gb1, (void*)NULL);
GB_set_user_data(&gb2, (void*)NULL);
GB_set_pixels_output(&gb1,(unsigned int*)frame_buf);
GB_set_rgb_encode_callback(&gb1, rgb_encode);
GB_set_pixels_output(&gb2,(unsigned int*)(frame_buf + VIDEO_PIXELS));
GB_set_rgb_encode_callback(&gb2, rgb_encode);
GB_set_sample_rate(&gb1, AUDIO_FREQUENCY);
GB_set_sample_rate(&gb2, AUDIO_FREQUENCY);
GB_set_serial_transfer_start_callback(&gb1, serial_start1);
GB_set_serial_transfer_end_callback(&gb1, serial_end1);
GB_set_serial_transfer_start_callback(&gb2, serial_start2);
GB_set_serial_transfer_end_callback(&gb2, serial_end2);
struct retro_memory_descriptor descs[7];
size_t size;
uint16_t bank;
memset(descs, 0, sizeof(descs));
descs[0].ptr = GB_get_direct_access(&gb1, GB_DIRECT_ACCESS_IE, &size, &bank);
descs[0].start = 0xFFFF;
descs[0].len = 1;
descs[1].ptr = GB_get_direct_access(&gb1, GB_DIRECT_ACCESS_HRAM, &size, &bank);
descs[1].start = 0xFF80;
descs[1].len = 0x0080;
descs[2].ptr = GB_get_direct_access(&gb1, GB_DIRECT_ACCESS_RAM, &size, &bank);
descs[2].start = 0xC000;
descs[2].len = 0x2000;
descs[3].ptr = GB_get_direct_access(&gb1, GB_DIRECT_ACCESS_CART_RAM, &size, &bank);
descs[3].start = 0xA000;
descs[3].len = 0x2000;
descs[4].ptr = GB_get_direct_access(&gb1, GB_DIRECT_ACCESS_VRAM, &size, &bank);
descs[4].start = 0x8000;
descs[4].len = 0x2000;
descs[5].ptr = GB_get_direct_access(&gb1, 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(&gb1, 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(void)
{
struct retro_variable var = {0};
var.key = "sameboy_color_correction_mode";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value && GB_is_cgb(&gb1))
{
if (strcmp(var.value, "off") == 0)
{
GB_set_color_correction_mode(&gb1, GB_COLOR_CORRECTION_DISABLED);
GB_set_color_correction_mode(&gb2, GB_COLOR_CORRECTION_DISABLED);
}
else if (strcmp(var.value, "correct curves") == 0)
{
GB_set_color_correction_mode(&gb1, GB_COLOR_CORRECTION_CORRECT_CURVES);
GB_set_color_correction_mode(&gb2, GB_COLOR_CORRECTION_CORRECT_CURVES);
}
else if (strcmp(var.value, "emulate hardware") == 0)
{
GB_set_color_correction_mode(&gb1, GB_COLOR_CORRECTION_EMULATE_HARDWARE);
GB_set_color_correction_mode(&gb2, GB_COLOR_CORRECTION_EMULATE_HARDWARE);
}
else if (strcmp(var.value, "preserve brightness") == 0)
{
GB_set_color_correction_mode(&gb1, GB_COLOR_CORRECTION_PRESERVE_BRIGHTNESS);
GB_set_color_correction_mode(&gb2, 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(&gb1, GB_HIGHPASS_OFF);
GB_set_highpass_filter_mode(&gb2, GB_HIGHPASS_OFF);
}
else if (strcmp(var.value, "accurate") == 0)
{
GB_set_highpass_filter_mode(&gb1, GB_HIGHPASS_ACCURATE);
GB_set_highpass_filter_mode(&gb2, GB_HIGHPASS_ACCURATE);
}
else if (strcmp(var.value, "remove dc offset") == 0)
{
GB_set_highpass_filter_mode(&gb1, GB_HIGHPASS_REMOVE_DC_OFFSET);
GB_set_highpass_filter_mode(&gb2, 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;
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(&gb1) && new_model != model) {
model = new_model;
init_for_current_model();
}
if (GB_is_inited(&gb2) && new_model != model) {
model = new_model;
init_for_current_model();
}
else {
model = new_model;
}
}
}
int frames = 0;
void retro_run(void)
{
bool updated = false;
if (!frame_buf)
return;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
check_variables();
vblank1_occurred = vblank2_occurred = false;
signed delta = 0;
while (!vblank1_occurred || !vblank2_occurred) {
if (delta >= 0) {
delta -= GB_run(&gb1);
}
else {
delta += GB_run(&gb2);
}
}
video_cb(frame_buf, VIDEO_WIDTH, VIDEO_HEIGHT * 2, VIDEO_WIDTH * sizeof(uint32_t));
frames++;
}
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();
if (GB_load_rom(&gb1,info->path)) {
log_cb(RETRO_LOG_INFO, "Failed to load ROM\n");
return false;
}
if (GB_load_rom(&gb2,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" },
{ NULL }
};
environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
check_variables();
return true;
}
void retro_unload_game(void)
{
GB_free(&gb1);
GB_free(&gb2);
}
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)
{
return 2 * GB_get_save_state_size(&gb1);
}
bool retro_serialize(void *data, size_t size)
{
void* gb1_data = (uint8_t*)malloc(0.5 * size * sizeof(uint8_t));
void* gb2_data = (uint8_t*)malloc(0.5 * size * sizeof(uint8_t));
GB_save_state_to_buffer(&gb1, (uint8_t*) gb1_data);
GB_save_state_to_buffer(&gb2, (uint8_t*) gb2_data);
memcpy(data, gb1_data, size / 2);
memcpy(data + (size / 2), gb2_data, size / 2);
if (data)
return true;
else
return false;
}
bool retro_unserialize(const void *data, size_t size)
{
void* gb1_data = (uint8_t*)malloc(0.5 * size * sizeof(uint8_t));
void* gb2_data = (uint8_t*)malloc(0.5 * size * sizeof(uint8_t));
memcpy (gb1_data, data, size / 2);
memcpy (gb2_data, data + (size / 2), size / 2);
int ret1 = GB_load_state_from_buffer(&gb1, gb1_data, size / 2);
int ret2 = GB_load_state_from_buffer(&gb2, gb2_data, size / 2);
if (ret1 == 0 && ret2 ==0)
return true;
else
return false;
}
void *retro_get_memory_data(unsigned type)
{
void* data;
switch(type)
{
case RETRO_MEMORY_SYSTEM_RAM:
data = gb1.ram;
break;
case RETRO_MEMORY_SAVE_RAM:
if (gb1.cartridge_type->has_battery && gb1.mbc_ram_size != 0)
{
data = gb1.mbc_ram;
/* let's copy the save to gb2 so it can save independently */
memcpy(gb2.mbc_ram, gb1.mbc_ram, gb1.mbc_ram_size);
}
else
data = NULL;
break;
case RETRO_MEMORY_VIDEO_RAM:
data = gb1.vram;
break;
case RETRO_MEMORY_RTC:
if(gb1.cartridge_type->has_battery)
data = &gb1.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 = gb1.ram_size;
break;
case RETRO_MEMORY_SAVE_RAM:
if (gb1.cartridge_type->has_battery && gb1.mbc_ram_size != 0)
size = gb1.mbc_ram_size;
else
size = 0;
break;
case RETRO_MEMORY_VIDEO_RAM:
size = gb1.vram_size;
break;
case RETRO_MEMORY_RTC:
if(gb1.cartridge_type->has_battery)
size = sizeof (gb1.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;
}
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