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RetroArch/dynamic.c

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/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
*
* Some code herein may be based on code found in BSNES.
*
* SSNES is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with SSNES.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "dynamic.h"
#include "general.h"
#include "compat/strl.h"
#include <string.h>
#ifdef SSNES_CONSOLE
#include "console/console_ext.h"
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "boolean.h"
#include "libsnes.hpp"
#ifdef NEED_DYNAMIC
#ifdef _WIN32
#include <windows.h>
#else
#include <dlfcn.h>
#endif
#endif
#ifdef NEED_DYNAMIC
#define DLSYM(lib, x) dylib_proc(lib, #x)
#define SYM(type, x) do { \
p##x = (type)DLSYM(lib_handle, x); \
if (p##x == NULL) { SSNES_ERR("Failed to load symbol: \"%s\"\n", #x); ssnes_fail(1, "init_libsnes_sym()"); } \
} while (0)
#define OPT_SYM(type, x) do { \
p##x = (type)DLSYM(lib_handle, x); \
} while (0)
#endif
#ifdef HAVE_DYNAMIC
static dylib_t lib_handle = NULL;
#endif
void (*psnes_init)(void);
void (*psnes_set_video_refresh)(snes_video_refresh_t);
void (*psnes_set_audio_sample)(snes_audio_sample_t);
void (*psnes_set_input_poll)(snes_input_poll_t);
void (*psnes_set_input_state)(snes_input_state_t);
void (*psnes_reset)(void);
void (*psnes_run)(void);
void (*psnes_cheat_reset)(void);
void (*psnes_cheat_set)(unsigned, bool, const char*);
const char *(*psnes_library_id)(void) = NULL;
unsigned (*psnes_library_revision_minor)(void);
unsigned (*psnes_library_revision_major)(void);
bool (*psnes_load_cartridge_normal)(const char*, const uint8_t*, unsigned);
bool (*psnes_load_cartridge_super_game_boy)(
const char*, const uint8_t*, unsigned,
const char*, const uint8_t*, unsigned);
bool (*psnes_load_cartridge_bsx)(
const char*, const uint8_t*, unsigned,
const char*, const uint8_t*, unsigned);
bool (*psnes_load_cartridge_bsx_slotted)(
const char*, const uint8_t*, unsigned,
const char*, const uint8_t*, unsigned);
bool (*psnes_load_cartridge_sufami_turbo)(
const char*, const uint8_t*, unsigned,
const char*, const uint8_t*, unsigned,
const char*, const uint8_t*, unsigned);
void (*psnes_set_controller_port_device)(bool, unsigned);
bool (*psnes_get_region)(void);
unsigned (*psnes_serialize_size)(void);
bool (*psnes_serialize)(uint8_t*, unsigned);
bool (*psnes_unserialize)(const uint8_t*, unsigned);
void (*psnes_set_cartridge_basename)(const char*);
uint8_t* (*psnes_get_memory_data)(unsigned);
unsigned (*psnes_get_memory_size)(unsigned);
void (*psnes_unload_cartridge)(void);
void (*psnes_term)(void);
#if defined(NEED_DYNAMIC) || defined(SSNES_CONSOLE)
static void set_environment(void);
#endif
static void set_environment_defaults(void);
#ifdef HAVE_DYNAMIC
static void load_dynamic(void)
{
SSNES_LOG("Loading dynamic libsnes from: \"%s\"\n", g_settings.libsnes);
lib_handle = dylib_load(g_settings.libsnes);
if (!lib_handle)
{
SSNES_ERR("Failed to open dynamic library: \"%s\"\n", g_settings.libsnes);
ssnes_fail(1, "load_dynamic()");
}
SYM(void (*)(void), snes_init);
SYM(void (*)(snes_video_refresh_t), snes_set_video_refresh);
SYM(void (*)(snes_audio_sample_t), snes_set_audio_sample);
SYM(void (*)(snes_input_poll_t), snes_set_input_poll);
SYM(void (*)(snes_input_state_t), snes_set_input_state);
SYM(const char *(*)(void), snes_library_id);
SYM(unsigned (*)(void), snes_library_revision_minor);
SYM(unsigned (*)(void), snes_library_revision_major);
SYM(void (*)(void), snes_cheat_reset);
SYM(void (*)(unsigned, bool, const char*), snes_cheat_set);
SYM(void (*)(void), snes_reset);
SYM(void (*)(void), snes_run);
SYM(bool (*)(void), snes_get_region);
SYM(bool (*)(const char*, const uint8_t*, unsigned), snes_load_cartridge_normal);
SYM(bool (*)(const char*, const uint8_t*, unsigned,
const char*, const uint8_t*, unsigned), snes_load_cartridge_super_game_boy);
SYM(bool (*)(const char*, const uint8_t*, unsigned,
const char*, const uint8_t*, unsigned), snes_load_cartridge_bsx);
SYM(bool (*)(const char*, const uint8_t*, unsigned,
const char*, const uint8_t*, unsigned), snes_load_cartridge_bsx_slotted);
SYM(bool (*)(const char*, const uint8_t*, unsigned,
const char*, const uint8_t*, unsigned,
const char*, const uint8_t*, unsigned), snes_load_cartridge_sufami_turbo);
SYM(void (*)(bool, unsigned), snes_set_controller_port_device);
SYM(unsigned (*)(void), snes_serialize_size);
SYM(bool (*)(uint8_t*, unsigned), snes_serialize);
SYM(bool (*)(const uint8_t*, unsigned), snes_unserialize);
SYM(void (*)(const char*), snes_set_cartridge_basename);
SYM(uint8_t *(*)(unsigned), snes_get_memory_data);
SYM(unsigned (*)(unsigned), snes_get_memory_size);
SYM(void (*)(void), snes_unload_cartridge);
SYM(void (*)(void), snes_term);
}
#else
#define SSYM(x) do { \
p##x = x; \
} while (0)
static void set_statics(void)
{
SSYM(snes_init);
SSYM(snes_set_video_refresh);
SSYM(snes_set_audio_sample);
SSYM(snes_set_input_poll);
SSYM(snes_set_input_state);
SSYM(snes_library_revision_minor);
SSYM(snes_library_revision_major);
SSYM(snes_library_id);
SSYM(snes_cheat_reset);
SSYM(snes_cheat_set);
SSYM(snes_reset);
SSYM(snes_run);
SSYM(snes_get_region);
SSYM(snes_load_cartridge_normal);
SSYM(snes_load_cartridge_super_game_boy);
SSYM(snes_load_cartridge_bsx);
SSYM(snes_load_cartridge_bsx_slotted);
SSYM(snes_load_cartridge_sufami_turbo);
SSYM(snes_set_controller_port_device);
SSYM(snes_serialize_size);
SSYM(snes_serialize);
SSYM(snes_unserialize);
SSYM(snes_set_cartridge_basename);
SSYM(snes_get_memory_data);
SSYM(snes_get_memory_size);
SSYM(snes_unload_cartridge);
SSYM(snes_term);
}
#endif
void init_libsnes_sym(void)
{
// Guarantee that we can do "dirty" casting.
// Every OS that this program supports should pass this ...
ssnes_assert(sizeof(void*) == sizeof(void (*)(void)));
#ifdef HAVE_DYNAMIC
// Try to verify that -lsnes was not linked in from other modules
// since loading it dynamically and with -l will fail hard.
function_t sym = dylib_proc(NULL, "snes_init");
if (sym)
{
SSNES_ERR("Serious problem. SSNES wants to load libsnes dyamically, but it is already linked.\n");
SSNES_ERR("This could happen if other modules SSNES depends on link against libsnes directly.\n");
SSNES_ERR("Proceeding could cause a crash. Aborting ...\n");
ssnes_fail(1, "init_libsnes_sym()");
}
if (!*g_settings.libsnes)
{
#if defined(_WIN32)
strlcpy(g_settings.libsnes, "snes.dll", sizeof(g_settings.libsnes));
#elif defined(__APPLE__)
strlcpy(g_settings.libsnes, "libsnes.dylib", sizeof(g_settings.libsnes));
#else
strlcpy(g_settings.libsnes, "libsnes.so", sizeof(g_settings.libsnes));
#endif
}
load_dynamic();
#else
set_statics();
#endif
set_environment_defaults();
#if defined(NEED_DYNAMIC) || defined(SSNES_CONSOLE)
set_environment();
#endif
}
void uninit_libsnes_sym(void)
{
#ifdef HAVE_DYNAMIC
if (lib_handle)
dylib_close(lib_handle);
#endif
}
#ifdef NEED_DYNAMIC
// Platform independent dylib loading.
dylib_t dylib_load(const char *path)
{
#ifdef _WIN32
dylib_t lib = LoadLibrary(path);
if (!lib)
SSNES_ERR("Failed to load library, error code: 0x%x\n", (unsigned)GetLastError());
return lib;
#else
return dlopen(path, RTLD_LAZY);
#endif
}
function_t dylib_proc(dylib_t lib, const char *proc)
{
#ifdef _WIN32
function_t sym = (function_t)GetProcAddress(lib ? (HMODULE)lib : GetModuleHandle(NULL), proc);
#else
void *ptr_sym = NULL;
if (lib)
ptr_sym = dlsym(lib, proc);
else
{
void *handle = dlopen(NULL, RTLD_LAZY);
if (handle)
{
ptr_sym = dlsym(handle, proc);
dlclose(handle);
}
}
// Dirty hack to workaround the non-legality of (void*) -> fn-pointer casts.
function_t sym;
memcpy(&sym, &ptr_sym, sizeof(void*));
#endif
return sym;
}
void dylib_close(dylib_t lib)
{
#ifdef _WIN32
FreeLibrary((HMODULE)lib);
#else
dlclose(lib);
#endif
}
#endif
unsigned audio_sample_batch(const int16_t *, unsigned);
#if defined(NEED_DYNAMIC) || defined(SSNES_CONSOLE)
static bool environment_cb(unsigned cmd, void *data)
{
switch (cmd)
{
case SNES_ENVIRONMENT_GET_FULLPATH:
*(const char**)data = g_extern.system.fullpath;
SSNES_LOG("Environ FULLPATH: \"%s\"\n", g_extern.system.fullpath);
break;
case SNES_ENVIRONMENT_SET_GEOMETRY:
g_extern.system.geom = *(const struct snes_geometry*)data;
g_extern.system.geom.max_width = next_pow2(g_extern.system.geom.max_width);
g_extern.system.geom.max_height = next_pow2(g_extern.system.geom.max_height);
SSNES_LOG("Environ SET_GEOMETRY: (%ux%u) / (%ux%u)\n",
g_extern.system.geom.base_width,
g_extern.system.geom.base_height,
g_extern.system.geom.max_width,
g_extern.system.geom.max_height);
break;
case SNES_ENVIRONMENT_SET_PITCH:
g_extern.system.pitch = *(const unsigned*)data;
SSNES_LOG("Environ SET_PITCH: %u\n", g_extern.system.pitch);
break;
case SNES_ENVIRONMENT_GET_OVERSCAN:
*(bool*)data = !g_settings.video.crop_overscan;
SSNES_LOG("Environ GET_OVERSCAN: %u\n", (unsigned)!g_settings.video.crop_overscan);
break;
case SNES_ENVIRONMENT_SET_TIMING:
g_extern.system.timing = *(const struct snes_system_timing*)data;
g_extern.system.timing_set = true;
SSNES_LOG("Environ SET_TIMING: %.3f Hz/ %.3f Hz\n",
(float)g_extern.system.timing.fps, (float)g_extern.system.timing.sample_rate);
break;
case SNES_ENVIRONMENT_GET_CAN_DUPE:
#ifdef HAVE_FFMPEG
*(bool*)data = true;
SSNES_LOG("Environ GET_CAN_DUPE: true\n");
#else
*(bool*)data = false;
SSNES_LOG("Environ GET_CAN_DUPE: false\n");
#endif
break;
case SNES_ENVIRONMENT_SET_NEED_FULLPATH:
g_extern.system.need_fullpath = *(const bool*)data;
SSNES_LOG("Environ SET_NEED_FULLPATH: %s\n", g_extern.system.need_fullpath ? "true" : "false");
break;
case SNES_ENVIRONMENT_GET_CAN_REWIND:
*(bool*)data = g_settings.rewind_enable;
SSNES_LOG("Environ GET_CAN_REWIND: %s\n", g_settings.rewind_enable ? "true" : "false");
break;
case SNES_ENVIRONMENT_GET_VARIABLE:
{
struct snes_variable *var = (struct snes_variable*)data;
if (var->key)
{
// Split string has '\0' delimiters so we have to find the position in original string,
// then pass the corresponding offset into the split string.
const char *key = strstr(g_extern.system.environment, var->key);
size_t key_len = strlen(var->key);
if (key && key[key_len] == '=')
{
ptrdiff_t offset = key - g_extern.system.environment;
var->value = &g_extern.system.environment_split[offset + key_len + 1];
}
else
var->value = NULL;
}
else
var->value = g_extern.system.environment;
SSNES_LOG("Environ GET_VARIABLE: %s=%s\n",
var->key ? var->key : "null",
var->value ? var->value : "null");
break;
}
case SNES_ENVIRONMENT_SET_VARIABLES:
{
SSNES_LOG("Environ SET_VARIABLES:\n");
SSNES_LOG("=======================\n");
const struct snes_variable *vars = (const struct snes_variable*)data;
while (vars->key)
{
SSNES_LOG("\t%s :: %s\n",
vars->key,
vars->value ? vars->value : "N/A");
vars++;
}
SSNES_LOG("=======================\n");
break;
}
#ifdef SSNES_CONSOLE
case SNES_ENVIRONMENT_SET_BATCH_LOAD:
g_console.block_zip_extract = *(const bool*)data;
break;
case SNES_ENVIRONMENT_SET_ROM_FORMATS:
ssnes_console_set_rom_ext((const char*)data);
break;
#endif
case SNES_ENVIRONMENT_SET_MESSAGE:
{
const struct snes_message *msg = (const struct snes_message*)data;
SSNES_LOG("Environ SET_MESSAGE: %s\n", msg->msg);
if (g_extern.msg_queue)
msg_queue_push(g_extern.msg_queue, msg->msg, 1, msg->frames);
break;
}
case SNES_ENVIRONMENT_GET_AUDIO_BATCH_CB:
SSNES_LOG("Environ GET_AUDIO_BATCH_CB\n");
*(snes_audio_sample_batch_t*)data = audio_sample_batch;
break;
case SNES_ENVIRONMENT_SET_ROTATION:
{
unsigned rotation = *(const unsigned*)data;
SSNES_LOG("Environ SET_ROTATION: %u\n", rotation);
if (!g_settings.video.allow_rotate)
break;
g_extern.system.rotation = rotation;
if (driver.video && driver.video->set_rotation)
{
if (driver.video_data)
video_set_rotation_func(rotation);
}
else
return false;
break;
}
default:
SSNES_LOG("Environ UNSUPPORTED (#%u).\n", cmd);
return false;
}
return true;
}
#endif
#ifdef NEED_DYNAMIC
// SSNES extension hooks. Totally optional 'n shizz :)
static void set_environment(void)
{
#ifdef HAVE_DYNAMIC
dylib_t lib = lib_handle;
#else
dylib_t lib = NULL;
#endif
void (*psnes_set_environment)(snes_environment_t) =
(void (*)(snes_environment_t))dylib_proc(lib, "snes_set_environment");
if (psnes_set_environment)
psnes_set_environment(environment_cb);
}
#elif defined(SSNES_CONSOLE)
// Not very optional when we're running on a console without dynamic loading support.
static void set_environment(void)
{
snes_set_environment(environment_cb);
}
#endif
// Assume SNES as defaults.
static void set_environment_defaults(void)
{
SSNES_LOG("Setting environment defaults (SNES)\n");
g_extern.system.pitch = 0; // 0 is classic libsnes semantics.
g_extern.system.geom.base_width = 256;
g_extern.system.geom.base_height = 224;
g_extern.system.geom.max_width = 512;
g_extern.system.geom.max_height = 512;
// Split up environment variables beforehand.
if (g_extern.system.environment_split && strtok(g_extern.system.environment_split, ";"))
while (strtok(NULL, ";"));
}
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