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core.c
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core.c
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#include <dlfcn.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include "cheat.h"
#include "core.h"
#include "libpicofe/input.h"
#include "main.h"
#include "options.h"
#include "overrides.h"
#include "plat.h"
#include "util.h"
struct core_cbs current_core;
char core_path[MAX_PATH];
struct content *content;
static struct string_list *extensions;
struct cheats *cheats;
double sample_rate;
double frame_rate;
double aspect_ratio;
unsigned audio_buffer_size_override;
int state_slot;
int resume_slot = -1;
static char config_dir[MAX_PATH];
static char save_dir[MAX_PATH];
static char system_dir[MAX_PATH];
static struct retro_disk_control_ext_callback disk_control_ext;
static uint32_t buttons = 0;
static int core_load_game_info(struct content *content, struct retro_game_info *game_info) {
struct retro_system_info info = {};
current_core.retro_get_system_info(&info);
return content_load_game_info(content, game_info, info.need_fullpath);
}
void config_file_name(char *buf, size_t len, int is_game)
{
if (is_game && content) {
content_based_name(content, buf, len, save_dir, NULL, ".cfg");
} else {
snprintf(buf, len, "%s%s", config_dir, "picoarch.cfg");
}
}
void save_relative_path(char *buf, size_t len, const char *basename) {
snprintf(buf, len, "%s%s", save_dir, basename);
}
void sram_write(void) {
char filename[MAX_PATH];
FILE *sram_file = NULL;
void *sram;
size_t sram_size = current_core.retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
if (!sram_size) {
return;
}
content_based_name(content, filename, MAX_PATH, save_dir, NULL, ".sav");
sram_file = fopen(filename, "w");
if (!sram_file) {
PA_ERROR("Error opening SRAM file: %s\n", strerror(errno));
return;
}
sram = current_core.retro_get_memory_data(RETRO_MEMORY_SAVE_RAM);
if (!sram || sram_size != fwrite(sram, 1, sram_size, sram_file)) {
PA_ERROR("Error writing SRAM data to file\n");
}
fclose(sram_file);
sync();
}
void sram_read(void) {
char filename[MAX_PATH];
FILE *sram_file = NULL;
void *sram;
size_t sram_size = current_core.retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
if (!sram_size) {
return;
}
content_based_name(content, filename, MAX_PATH, save_dir, NULL, ".sav");
sram_file = fopen(filename, "r");
if (!sram_file) {
return;
}
sram = current_core.retro_get_memory_data(RETRO_MEMORY_SAVE_RAM);
if (!sram || !fread(sram, 1, sram_size, sram_file)) {
PA_ERROR("Error reading SRAM data\n");
}
fclose(sram_file);
}
bool state_allowed(void) {
return current_core.retro_serialize_size() > 0;
}
void state_file_name(char *name, size_t size, int slot) {
char extension[5] = {0};
snprintf(extension, 5, ".st%d", slot);
content_based_name(content, name, MAX_PATH, config_dir, NULL, extension);
}
int state_read(void) {
char filename[MAX_PATH];
FILE *state_file = NULL;
void *state = NULL;
int ret = -1;
size_t state_size = current_core.retro_serialize_size();
if (!state_size) {
return 0;
}
state = calloc(1, state_size);
if (!state) {
PA_ERROR("Couldn't allocate memory for state\n");
goto error;
}
state_file_name(filename, MAX_PATH, state_slot);
state_file = fopen(filename, "r");
if (!state_file) {
PA_ERROR("Error opening state file: %s\n", strerror(errno));
goto error;
}
if (state_size != fread(state, 1, state_size, state_file)) {
PA_ERROR("Error reading state data from file\n");
goto error;
}
if (!current_core.retro_unserialize(state, state_size)) {
PA_ERROR("Error restoring save state\n", strerror(errno));
goto error;
}
ret = 0;
error:
if (state)
free(state);
if (state_file)
fclose(state_file);
return ret;
}
int state_write(void) {
char filename[MAX_PATH];
FILE *state_file = NULL;
void *state = NULL;
int ret = -1;
size_t state_size = current_core.retro_serialize_size();
if (!state_size) {
return false;
}
state = calloc(1, state_size);
if (!state) {
PA_ERROR("Couldn't allocate memory for state\n");
goto error;
}
state_file_name(filename, MAX_PATH, state_slot);
state_file = fopen(filename, "w");
if (!state_file) {
PA_ERROR("Error opening state file: %s\n", strerror(errno));
goto error;
}
if (!current_core.retro_serialize(state, state_size)) {
PA_ERROR("Error creating save state\n", strerror(errno));
goto error;
}
if (state_size != fwrite(state, 1, state_size, state_file)) {
PA_ERROR("Error writing state data to file\n");
goto error;
}
plat_dump_screen(filename);
ret = 0;
error:
if (state)
free(state);
if (state_file)
fclose(state_file);
sync();
return ret;
}
int state_resume(void) {
int ret = 0;
if (resume_slot != -1) {
state_slot = resume_slot;
ret = state_read();
resume_slot = -1;
}
return ret;
}
unsigned disc_get_count(void) {
if (disk_control_ext.get_num_images)
return disk_control_ext.get_num_images();
return 0;
}
unsigned disc_get_index(void) {
if (disk_control_ext.get_image_index)
return disk_control_ext.get_image_index();
return 0;
}
bool disc_switch_index(unsigned index) {
bool ret = false;
if (!disk_control_ext.set_eject_state || !disk_control_ext.set_image_index)
return false;
disk_control_ext.set_eject_state(true);
ret = disk_control_ext.set_image_index(index);
disk_control_ext.set_eject_state(false);
return ret;
}
bool disc_replace_index(unsigned index, const char *content_path) {
bool ret = false;
struct retro_game_info info = {};
struct content *content;
if (!disk_control_ext.replace_image_index)
return false;
content = content_init(content_path);
if (!content)
goto finish;
if (core_load_game_info(content, &info))
goto finish;
ret = disk_control_ext.replace_image_index(index, &info);
finish:
content_free(content);
return ret;
}
static void set_directories(const char *core_name, const char *tag_name) {
const char *home = getenv("HOME");
const char *sdcard_path = getenv("SDCARD_PATH");
// char *dst = save_dir;
// int len = MAX_PATH;
// #ifndef MINUI
// char cwd[MAX_PATH];
// #endif
if (home != NULL) {
snprintf(config_dir, MAX_PATH, "%s/.picoarch-%s-%s/", home, core_name, tag_name);
mkdir(config_dir, 0755);
}
// strncpy(config_dir, save_dir, MAX_PATH-1);
snprintf(save_dir, MAX_PATH, "%s/Saves/%s/", sdcard_path, tag_name);
snprintf(system_dir, MAX_PATH, "%s/Bios/%s", sdcard_path, tag_name);
// #ifdef MINUI
// strncpy(system_dir, save_dir, MAX_PATH-1);
// #else
// if (getcwd(cwd, MAX_PATH)) {
// snprintf(system_dir, MAX_PATH, "%s/.picoarch_system", cwd);
// mkdir(system_dir, 0755);
// } else {
// PA_FATAL("Can't find system directory");
// }
// #endif
}
// based on eggs pokemini miyoominin rumble
static bool pa_set_rumble_state(unsigned port, enum retro_rumble_effect effect, uint16_t strength) {
// PA_INFO("Rumble (strength: %u)\n", (unsigned int)strength);
uint32_t val = strength>0; // TODO: can we do better than just off or on?
int fd;
const char str_export[] = "48";
const char str_direction[] = "out";
char value[1];
value[0] = ((val&1)^1) + 0x30;
fd = open("/sys/class/gpio/export",O_WRONLY);
if (fd > 0) {
write(fd, str_export, 2);
close(fd);
}
fd = open("/sys/class/gpio/gpio48/direction",O_WRONLY);
if (fd > 0) {
write(fd, str_direction, 3);
close(fd);
}
fd = open("/sys/class/gpio/gpio48/value",O_WRONLY);
if (fd > 0) {
write(fd, value, 1);
close(fd);
}
return true;
}
static bool pa_environment(unsigned cmd, void *data) {
switch(cmd) {
case RETRO_ENVIRONMENT_GET_OVERSCAN: { /* 2 */
bool *out = (bool *)data;
if (out)
*out = true;
break;
}
case RETRO_ENVIRONMENT_GET_CAN_DUPE: { /* 3 */
bool *out = (bool *)data;
if (out)
*out = true;
break;
}
case RETRO_ENVIRONMENT_SET_MESSAGE: { /* 6 */
const struct retro_message *message = (const struct retro_message*)data;
if (message) {
PA_INFO("%s\n", message->msg);
}
break;
}
case RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY: { /* 9 */
const char **out = (const char **)data;
if (out)
*out = system_dir;
break;
}
case RETRO_ENVIRONMENT_SET_PIXEL_FORMAT: { /* 10 */
const enum retro_pixel_format *format = (enum retro_pixel_format *)data;
if (*format != RETRO_PIXEL_FORMAT_RGB565) {
/* 565 is only supported format */
return false;
}
break;
}
case RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE: { /* 13 */
const struct retro_disk_control_callback *var =
(const struct retro_disk_control_callback *)data;
if (var) {
memset(&disk_control_ext, 0, sizeof(struct retro_disk_control_ext_callback));
memcpy(&disk_control_ext, var, sizeof(struct retro_disk_control_callback));
}
break;
}
case RETRO_ENVIRONMENT_GET_VARIABLE: { /* 15 */
struct retro_variable *var = (struct retro_variable *)data;
if (var && var->key) {
var->value = options_get_value(var->key);
}
break;
}
case RETRO_ENVIRONMENT_SET_VARIABLES: { /* 16 */
const struct retro_variable *vars = (const struct retro_variable *)data;
options_free();
if (vars) {
options_init_variables(vars);
load_config();
}
break;
}
case RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE: { /* 17 */
bool *out = (bool *)data;
if (out)
*out = options_changed();
break;
}
case RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE: { /* 23 */
struct retro_rumble_interface *iface =
(struct retro_rumble_interface*)data;
PA_INFO("Setup rumble interface.\n");
iface->set_rumble_state = pa_set_rumble_state;
break;
}
case RETRO_ENVIRONMENT_GET_LOG_INTERFACE: { /* 27 */
struct retro_log_callback *log_cb = (struct retro_log_callback *)data;
if (log_cb)
log_cb->log = pa_log;
break;
}
case RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY: { /* 31 */
const char **out = (const char **)data;
if (out)
*out = save_dir;
break;
}
case RETRO_ENVIRONMENT_GET_INPUT_BITMASKS: { /* 52 */
bool *out = (bool *)data;
if (out)
*out = true;
break;
}
case RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION: { /* 52 */
unsigned *out = (unsigned *)data;
if (out)
*out = 1;
break;
}
case RETRO_ENVIRONMENT_SET_CORE_OPTIONS: { /* 53 */
options_free();
if (data) {
options_init(*(const struct retro_core_option_definition **)data);
load_config();
}
break;
}
case RETRO_ENVIRONMENT_SET_CORE_OPTIONS_INTL: { /* 54 */
const struct retro_core_options_intl *options = (const struct retro_core_options_intl *)data;
if (options && options->us) {
options_free();
options_init(options->us);
load_config();
}
break;
}
case RETRO_ENVIRONMENT_SET_CORE_OPTIONS_DISPLAY: { /* 55 */
const struct retro_core_option_display *display =
(const struct retro_core_option_display *)data;
if (display)
options_set_visible(display->key, display->visible);
break;
}
case RETRO_ENVIRONMENT_GET_DISK_CONTROL_INTERFACE_VERSION: { /* 57 */
unsigned *out = (unsigned *)data;
if (out)
*out = 1;
break;
}
case RETRO_ENVIRONMENT_SET_DISK_CONTROL_EXT_INTERFACE: { /* 58 */
const struct retro_disk_control_ext_callback *var =
(const struct retro_disk_control_ext_callback *)data;
if (var) {
memcpy(&disk_control_ext, var, sizeof(struct retro_disk_control_ext_callback));
}
break;
}
case RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK: { /* 62 */
const struct retro_audio_buffer_status_callback *cb =
(const struct retro_audio_buffer_status_callback *)data;
if (cb) {
current_core.retro_audio_buffer_status = cb->callback;
} else {
current_core.retro_audio_buffer_status = NULL;
}
break;
}
case RETRO_ENVIRONMENT_SET_MINIMUM_AUDIO_LATENCY: { /* 63 */
const unsigned *latency_ms = (const unsigned *)data;
if (latency_ms) {
unsigned frames = *latency_ms * frame_rate / 1000;
if (frames < 30)
audio_buffer_size_override = frames;
else
PA_WARN("Audio buffer change out of range (%d), ignored\n", frames);
}
break;
}
default:
PA_DEBUG("Unsupported environment cmd: %u\n", cmd);
return false;
}
return true;
}
static void pa_video_refresh(const void *data, unsigned width, unsigned height, size_t pitch) {
if (data && !should_quit) {
pa_track_render();
plat_video_process(data, width, height, pitch);
}
}
static void pa_audio_sample(int16_t left, int16_t right) {
const struct audio_frame frame = { .left = left, .right = right };
if (!should_quit && enable_audio)
plat_sound_write(&frame, 1);
}
static size_t pa_audio_sample_batch(const int16_t *data, size_t frames) {
if (!should_quit && enable_audio)
plat_sound_write((const struct audio_frame *)data, frames);
return frames;
}
static void pa_input_poll(void) {
int actions[IN_BINDTYPE_COUNT] = { 0, };
unsigned int emu_act;
int which = EACTION_NONE;
in_update(actions);
emu_act = actions[IN_BINDTYPE_EMU];
if (emu_act) {
for (; !(emu_act & 1); emu_act >>= 1, which++)
;
emu_act = which;
}
handle_emu_action(which);
buttons = actions[IN_BINDTYPE_PLAYER12];
}
static int16_t pa_input_state(unsigned port, unsigned device, unsigned index, unsigned id) {
if (port == 0 && device == RETRO_DEVICE_JOYPAD && index == 0) {
if (id == RETRO_DEVICE_ID_JOYPAD_MASK)
return buttons;
return (buttons >> id) & 1;
}
return 0;
}
void core_extract_name(const char* core_file, char *buf, size_t len) {
char *suffix = NULL;
strncpy(buf, basename(core_file), MAX_PATH);
buf[len - 1] = 0;
suffix = strrchr(buf, '_');
if (suffix && !strcmp(suffix, "_libretro.so"))
*suffix = 0;
else {
suffix = strrchr(buf, '.');
if (suffix && !strcmp(suffix, ".so"))
*suffix = 0;
}
}
int core_open(const char *corefile, const char *tag_name) {
struct retro_system_info info = {};
void (*set_environment)(retro_environment_t) = NULL;
void (*set_video_refresh)(retro_video_refresh_t) = NULL;
void (*set_audio_sample)(retro_audio_sample_t) = NULL;
void (*set_audio_sample_batch)(retro_audio_sample_batch_t) = NULL;
void (*set_input_poll)(retro_input_poll_t) = NULL;
void (*set_input_state)(retro_input_state_t) = NULL;
PA_INFO("Loading core %s\n", corefile);
memset(¤t_core, 0, sizeof(current_core));
current_core.handle = dlopen(corefile, RTLD_LAZY);
if (!current_core.handle) {
PA_ERROR("Couldn't load core: %s\n", dlerror());
return -1;
}
set_directories(core_name, tag_name);
set_overrides(core_name);
current_core.retro_init = dlsym(current_core.handle, "retro_init");
current_core.retro_deinit = dlsym(current_core.handle, "retro_deinit");
current_core.retro_get_system_info = dlsym(current_core.handle, "retro_get_system_info");
current_core.retro_get_system_av_info = dlsym(current_core.handle, "retro_get_system_av_info");
current_core.retro_set_controller_port_device = dlsym(current_core.handle, "retro_set_controller_port_device");
current_core.retro_reset = dlsym(current_core.handle, "retro_reset");
current_core.retro_run = dlsym(current_core.handle, "retro_run");
current_core.retro_serialize_size = dlsym(current_core.handle, "retro_serialize_size");
current_core.retro_serialize = dlsym(current_core.handle, "retro_serialize");
current_core.retro_unserialize = dlsym(current_core.handle, "retro_unserialize");
current_core.retro_cheat_reset = dlsym(current_core.handle, "retro_cheat_reset");
current_core.retro_cheat_set = dlsym(current_core.handle, "retro_cheat_set");
current_core.retro_load_game = dlsym(current_core.handle, "retro_load_game");
current_core.retro_load_game_special = dlsym(current_core.handle, "retro_load_game_special");
current_core.retro_unload_game = dlsym(current_core.handle, "retro_unload_game");
current_core.retro_get_region = dlsym(current_core.handle, "retro_get_region");
current_core.retro_get_memory_data = dlsym(current_core.handle, "retro_get_memory_data");
current_core.retro_get_memory_size = dlsym(current_core.handle, "retro_get_memory_size");
set_environment = dlsym(current_core.handle, "retro_set_environment");
set_video_refresh = dlsym(current_core.handle, "retro_set_video_refresh");
set_audio_sample = dlsym(current_core.handle, "retro_set_audio_sample");
set_audio_sample_batch = dlsym(current_core.handle, "retro_set_audio_sample_batch");
set_input_poll = dlsym(current_core.handle, "retro_set_input_poll");
set_input_state = dlsym(current_core.handle, "retro_set_input_state");
set_environment(pa_environment);
set_video_refresh(pa_video_refresh);
set_audio_sample(pa_audio_sample);
set_audio_sample_batch(pa_audio_sample_batch);
set_input_poll(pa_input_poll);
set_input_state(pa_input_state);
current_core.retro_get_system_info(&info);
if (info.valid_extensions)
extensions = string_split(info.valid_extensions, '|');
return 0;
}
void core_load(void) {
current_core.retro_init();
current_core.initialized = true;
PA_INFO("Finished loading core\n");
}
int core_load_content(struct content *content) {
struct retro_game_info game_info = {};
struct retro_system_av_info av_info = {};
int ret = -1;
char cheats_path[MAX_PATH] = {0};
if (core_load_game_info(content, &game_info)) {
goto finish;
}
if (!current_core.retro_load_game(&game_info)) {
PA_ERROR("Couldn't load content\n");
goto finish;
}
content_based_name(content, cheats_path, sizeof(cheats_path), config_dir, "cheats/", ".cht");
if (cheats_path[0] != '\0') {
cheats = cheats_load(cheats_path);
core_apply_cheats(cheats);
}
sram_read();
if (!strcmp(core_name, "fmsx") && current_core.retro_set_controller_port_device) {
/* fMSX works best with joypad + keyboard */
current_core.retro_set_controller_port_device(0, RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 0));
}
current_core.retro_get_system_av_info(&av_info);
PA_INFO("Screen: %dx%d\n", av_info.geometry.base_width, av_info.geometry.base_height);
PA_INFO("Audio sample rate: %f\n", av_info.timing.sample_rate);
PA_INFO("Frame rate: %f\n", av_info.timing.fps);
PA_INFO("Reported aspect ratio: %f\n", av_info.geometry.aspect_ratio);
sample_rate = av_info.timing.sample_rate;
frame_rate = av_info.timing.fps;
aspect_ratio = av_info.geometry.aspect_ratio;
plat_reinit();
#ifdef MMENU
content_based_name(content, save_template_path, MAX_PATH, config_dir, NULL, ".st%i");
#endif
ret = 0;
finish:
return ret;
}
void core_apply_cheats(struct cheats *cheats) {
if (!cheats)
return;
if (!current_core.retro_cheat_reset || !current_core.retro_cheat_set)
return;
current_core.retro_cheat_reset();
for (int i = 0; i < cheats->count; i++) {
if (cheats->cheats[i].enabled) {
current_core.retro_cheat_set(i, cheats->cheats[i].enabled, cheats->cheats[i].code);
}
}
}
void core_unload_content(void) {
sram_write();
cheats_free(cheats);
cheats = NULL;
current_core.retro_unload_game();
content_free(content);
content = NULL;
}
const char **core_extensions(void) {
if (extensions)
return extensions->list;
return NULL;
}
void core_unload(void) {
PA_INFO("Unloading core...\n");
if (current_core.initialized) {
core_unload_content();
current_core.retro_deinit();
current_core.initialized = false;
}
string_list_free(extensions);
extensions = NULL;
options_free();
if (current_core.handle) {
dlclose(current_core.handle);
current_core.handle = NULL;
}
}