mirror of
https://github.com/CTCaer/RetroArch.git
synced 2024-12-17 15:59:57 +00:00
344 lines
9.1 KiB
C
344 lines
9.1 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "dynamic.h"
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#include "general.h"
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#include "compat/strl.h"
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#include <string.h>
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#ifdef RARCH_CONSOLE
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#include "console/console_ext.h"
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "boolean.h"
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#include "libretro.h"
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#ifdef NEED_DYNAMIC
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#ifdef _WIN32
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#include <windows.h>
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#else
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#include <dlfcn.h>
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#endif
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#endif
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#ifdef HAVE_DYNAMIC
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#define SYM(x) do { \
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function_t func = dylib_proc(lib_handle, #x); \
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memcpy(&p##x, &func, sizeof(func)); \
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if (p##x == NULL) { RARCH_ERR("Failed to load symbol: \"%s\"\n", #x); rarch_fail(1, "init_libretro_sym()"); } \
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} while (0)
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static dylib_t lib_handle = NULL;
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#else
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#define SYM(x) p##x = x
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#endif
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void (*pretro_init)(void);
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void (*pretro_deinit)(void);
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unsigned (*pretro_api_version)(void);
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void (*pretro_get_system_info)(struct retro_system_info*);
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void (*pretro_get_system_av_info)(struct retro_system_av_info*);
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void (*pretro_set_environment)(retro_environment_t);
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void (*pretro_set_video_refresh)(retro_video_refresh_t);
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void (*pretro_set_audio_sample)(retro_audio_sample_t);
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void (*pretro_set_audio_sample_batch)(retro_audio_sample_batch_t);
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void (*pretro_set_input_poll)(retro_input_poll_t);
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void (*pretro_set_input_state)(retro_input_state_t);
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void (*pretro_set_controller_port_device)(unsigned, unsigned);
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void (*pretro_reset)(void);
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void (*pretro_run)(void);
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size_t (*pretro_serialize_size)(void);
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bool (*pretro_serialize)(void*, size_t);
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bool (*pretro_unserialize)(const void*, size_t);
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void (*pretro_cheat_reset)(void);
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void (*pretro_cheat_set)(unsigned, bool, const char*);
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bool (*pretro_load_game)(const struct retro_game_info*);
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bool (*pretro_load_game_special)(unsigned, const struct retro_game_info*, size_t);
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void (*pretro_unload_game)(void);
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unsigned (*pretro_get_region)(void);
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void *(*pretro_get_memory_data)(unsigned);
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size_t (*pretro_get_memory_size)(unsigned);
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static void set_environment(void);
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static void set_environment_defaults(void);
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static void load_symbols(void)
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{
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#ifdef HAVE_DYNAMIC
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RARCH_LOG("Loading dynamic libsnes from: \"%s\"\n", g_settings.libretro);
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lib_handle = dylib_load(g_settings.libretro);
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if (!lib_handle)
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{
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RARCH_ERR("Failed to open dynamic library: \"%s\"\n", g_settings.libretro);
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rarch_fail(1, "load_dynamic()");
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}
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#endif
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SYM(retro_init);
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SYM(retro_deinit);
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SYM(retro_api_version);
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SYM(retro_get_system_info);
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SYM(retro_get_system_av_info);
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SYM(retro_set_environment);
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SYM(retro_set_video_refresh);
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SYM(retro_set_audio_sample);
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SYM(retro_set_audio_sample_batch);
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SYM(retro_set_input_poll);
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SYM(retro_set_input_state);
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SYM(retro_set_controller_port_device);
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SYM(retro_reset);
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SYM(retro_run);
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SYM(retro_serialize_size);
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SYM(retro_serialize);
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SYM(retro_unserialize);
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SYM(retro_cheat_reset);
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SYM(retro_cheat_set);
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SYM(retro_load_game);
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SYM(retro_load_game_special);
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SYM(retro_unload_game);
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SYM(retro_get_region);
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SYM(retro_get_memory_data);
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SYM(retro_get_memory_size);
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}
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void init_libretro_sym(void)
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{
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// Guarantee that we can do "dirty" casting.
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// Every OS that this program supports should pass this ...
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rarch_assert(sizeof(void*) == sizeof(void (*)(void)));
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#ifdef HAVE_DYNAMIC
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// Try to verify that -lsnes was not linked in from other modules
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// since loading it dynamically and with -l will fail hard.
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function_t sym = dylib_proc(NULL, "retro_init");
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if (sym)
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{
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RARCH_ERR("Serious problem. RetroArch wants to load libsnes dyamically, but it is already linked.\n");
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RARCH_ERR("This could happen if other modules RetroArch depends on link against libsnes directly.\n");
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RARCH_ERR("Proceeding could cause a crash. Aborting ...\n");
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rarch_fail(1, "init_libretro_sym()");
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}
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if (!*g_settings.libretro)
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{
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RARCH_ERR("RetroArch is built for dynamic libretro, but libretro_path is not set. Cannot continue.\n");
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rarch_fail(1, "init_libretro_sym()");
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}
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#endif
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load_symbols();
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set_environment_defaults();
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set_environment();
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}
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void uninit_libretro_sym(void)
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{
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#ifdef HAVE_DYNAMIC
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if (lib_handle)
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dylib_close(lib_handle);
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#endif
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}
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#ifdef NEED_DYNAMIC
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// Platform independent dylib loading.
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dylib_t dylib_load(const char *path)
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{
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#ifdef _WIN32
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dylib_t lib = LoadLibrary(path);
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if (!lib)
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RARCH_ERR("Failed to load library, error code: 0x%x\n", (unsigned)GetLastError());
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return lib;
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#else
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return dlopen(path, RTLD_LAZY);
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#endif
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}
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function_t dylib_proc(dylib_t lib, const char *proc)
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{
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#ifdef _WIN32
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function_t sym = (function_t)GetProcAddress(lib ? (HMODULE)lib : GetModuleHandle(NULL), proc);
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#else
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void *ptr_sym = NULL;
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if (lib)
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ptr_sym = dlsym(lib, proc);
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else
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{
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void *handle = dlopen(NULL, RTLD_LAZY);
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if (handle)
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{
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ptr_sym = dlsym(handle, proc);
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dlclose(handle);
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}
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}
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// Dirty hack to workaround the non-legality of (void*) -> fn-pointer casts.
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function_t sym;
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memcpy(&sym, &ptr_sym, sizeof(void*));
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#endif
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return sym;
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}
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void dylib_close(dylib_t lib)
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{
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#ifdef _WIN32
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FreeLibrary((HMODULE)lib);
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#else
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dlclose(lib);
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#endif
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}
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#endif
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static bool environment_cb(unsigned cmd, void *data)
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{
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switch (cmd)
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{
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case RETRO_ENVIRONMENT_GET_OVERSCAN:
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*(bool*)data = !g_settings.video.crop_overscan;
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RARCH_LOG("Environ GET_OVERSCAN: %u\n", (unsigned)!g_settings.video.crop_overscan);
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break;
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case RETRO_ENVIRONMENT_GET_CAN_DUPE:
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#ifdef HAVE_FFMPEG
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*(bool*)data = true;
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RARCH_LOG("Environ GET_CAN_DUPE: true\n");
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#else
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*(bool*)data = false;
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RARCH_LOG("Environ GET_CAN_DUPE: false\n");
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#endif
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break;
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case RETRO_ENVIRONMENT_GET_VARIABLE:
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{
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struct retro_variable *var = (struct retro_variable*)data;
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if (var->key)
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{
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// Split string has '\0' delimiters so we have to find the position in original string,
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// then pass the corresponding offset into the split string.
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const char *key = strstr(g_extern.system.environment, var->key);
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size_t key_len = strlen(var->key);
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if (key && key[key_len] == '=')
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{
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ptrdiff_t offset = key - g_extern.system.environment;
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var->value = &g_extern.system.environment_split[offset + key_len + 1];
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}
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else
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var->value = NULL;
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}
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else
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var->value = g_extern.system.environment;
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RARCH_LOG("Environ GET_VARIABLE: %s=%s\n",
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var->key ? var->key : "null",
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var->value ? var->value : "null");
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break;
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}
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case RETRO_ENVIRONMENT_SET_VARIABLES:
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{
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RARCH_LOG("Environ SET_VARIABLES:\n");
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RARCH_LOG("=======================\n");
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const struct retro_variable *vars = (const struct retro_variable*)data;
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while (vars->key)
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{
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RARCH_LOG("\t%s :: %s\n",
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vars->key,
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vars->value ? vars->value : "N/A");
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vars++;
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}
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RARCH_LOG("=======================\n");
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break;
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}
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case RETRO_ENVIRONMENT_SET_MESSAGE:
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{
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const struct retro_message *msg = (const struct retro_message*)data;
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RARCH_LOG("Environ SET_MESSAGE: %s\n", msg->msg);
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if (g_extern.msg_queue)
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msg_queue_push(g_extern.msg_queue, msg->msg, 1, msg->frames);
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break;
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}
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case RETRO_ENVIRONMENT_SET_ROTATION:
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{
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unsigned rotation = *(const unsigned*)data;
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RARCH_LOG("Environ SET_ROTATION: %u\n", rotation);
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if (!g_settings.video.allow_rotate)
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break;
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g_extern.system.rotation = rotation;
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if (driver.video && driver.video->set_rotation)
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{
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if (driver.video_data)
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video_set_rotation_func(rotation);
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}
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else
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return false;
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break;
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}
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case RETRO_ENVIRONMENT_SHUTDOWN:
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g_extern.system.shutdown = true;
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break;
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default:
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RARCH_LOG("Environ UNSUPPORTED (#%u).\n", cmd);
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return false;
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}
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return true;
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}
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static void set_environment(void)
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{
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pretro_set_environment(environment_cb);
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}
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// Assume SNES as defaults.
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static void set_environment_defaults(void)
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{
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// Split up environment variables beforehand.
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if (g_extern.system.environment_split && strtok(g_extern.system.environment_split, ";"))
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while (strtok(NULL, ";"));
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}
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