static void load_symbols(void)
{
#ifdef HAVE_DYNAMIC
   const char *libretro_path = g_settings.libretro;
   char libretro_core_buffer[PATH_MAX];

   if (path_is_directory(g_settings.libretro))
   {
      if (!find_first_libretro(libretro_core_buffer, sizeof(libretro_core_buffer),
               g_settings.libretro, g_extern.fullpath))
      {
         RARCH_ERR("libretro_path is a directory, but no valid libretro implementation was found.\n");
         rarch_fail(1, "load_dynamic()");
      }

      libretro_path = libretro_core_buffer;
   }

   RARCH_LOG("Loading dynamic libretro from: \"%s\"\n", libretro_path);
   lib_handle = dylib_load(libretro_path);
   if (!lib_handle)
   {
      RARCH_ERR("Failed to open dynamic library: \"%s\"\n", libretro_path);
      rarch_fail(1, "load_dynamic()");
   }
#endif

   SYM(retro_init);
   SYM(retro_deinit);

   SYM(retro_api_version);
   SYM(retro_get_system_info);
   SYM(retro_get_system_av_info);

   SYM(retro_set_environment);
   SYM(retro_set_video_refresh);
   SYM(retro_set_audio_sample);
   SYM(retro_set_audio_sample_batch);
   SYM(retro_set_input_poll);
   SYM(retro_set_input_state);

   SYM(retro_set_controller_port_device);

   SYM(retro_reset);
   SYM(retro_run);

   SYM(retro_serialize_size);
   SYM(retro_serialize);
   SYM(retro_unserialize);

   SYM(retro_cheat_reset);
   SYM(retro_cheat_set);

   SYM(retro_load_game);
   SYM(retro_load_game_special);

   SYM(retro_unload_game);
   SYM(retro_get_region);
   SYM(retro_get_memory_data);
   SYM(retro_get_memory_size);
}

/**
 * rarch_main_init:
 * @argc                 : Count of (commandline) arguments.
 * @argv                 : (Commandline) arguments. 
 *
 * Initializes the program.
 *
 * Returns: 0 on success, otherwise 1 if there was an error.
 **/
int rarch_main_init(int argc, char *argv[])
{
   int sjlj_ret;
   global_t     *global = global_get_ptr();

   init_state();

   if ((sjlj_ret = setjmp(global->error_sjlj_context)) > 0)
   {
      RARCH_ERR("Fatal error received in: \"%s\"\n", global->error_string);
      return sjlj_ret;
   }
   global->inited.error = true;
   global->log_file     = stderr;
   parse_input(argc, argv);

   if (global->verbosity)
   {
      char str[PATH_MAX_LENGTH] = {0};

      RARCH_LOG_OUTPUT("=== Build =======================================");
      rarch_info_get_capabilities(RARCH_CAPABILITIES_CPU, str, sizeof(str));
      fprintf(stderr, "%s", str);
      fprintf(stderr, "Built: %s\n", __DATE__);
      RARCH_LOG_OUTPUT("Version: %s\n", PACKAGE_VERSION);
#ifdef HAVE_GIT_VERSION
      RARCH_LOG_OUTPUT("Git: %s\n", rarch_git_version);
#endif
      RARCH_LOG_OUTPUT("=================================================\n");
   }

   rarch_ctl(RARCH_ACTION_STATE_VALIDATE_CPU_FEATURES, NULL);
   config_load();

   {
      settings_t *settings = config_get_ptr();

      if (settings && (settings->multimedia.builtin_mediaplayer_enable ||
            settings->multimedia.builtin_imageviewer_enable))
      {
         switch (rarch_path_is_media_type(global->path.fullpath))
         {
            case RARCH_CONTENT_MOVIE:
            case RARCH_CONTENT_MUSIC:
               if (settings->multimedia.builtin_mediaplayer_enable)
               {
#ifdef HAVE_FFMPEG
                  global->has_set.libretro              = false;
                  global->inited.core.type              = CORE_TYPE_FFMPEG;
#endif
               }
               break;
#ifdef HAVE_IMAGEVIEWER
            case RARCH_CONTENT_IMAGE:
               if (settings->multimedia.builtin_imageviewer_enable)
               {
                  global->has_set.libretro              = false;
                  global->inited.core.type              = CORE_TYPE_IMAGEVIEWER;
               }
               break;
#endif
            default:
               break;
         }
      }
   }

   init_libretro_sym(global->inited.core.type);
   rarch_system_info_init();

   init_drivers_pre();

   if (!event_command(EVENT_CMD_CORE_INIT))
      goto error;

   event_command(EVENT_CMD_DRIVERS_INIT);
   event_command(EVENT_CMD_COMMAND_INIT);
   event_command(EVENT_CMD_REWIND_INIT);
   event_command(EVENT_CMD_CONTROLLERS_INIT);
   event_command(EVENT_CMD_RECORD_INIT);
   event_command(EVENT_CMD_CHEATS_INIT);
   event_command(EVENT_CMD_REMAPPING_INIT);

   event_command(EVENT_CMD_SAVEFILES_INIT);
#if defined(GEKKO) && defined(HW_RVL)
   {
      settings_t *settings = config_get_ptr();

      if (settings)
      {
         event_command(EVENT_CMD_VIDEO_SET_ASPECT_RATIO);
//.........这里部分代码省略.........

/**
 * recording_init:
 *
 * Initializes recording.
 *
 * Returns: true (1) if successful, otherwise false (0).
 **/
bool recording_init(void)
{
   char recording_file[PATH_MAX_LENGTH] = {0};
   struct ffemu_params params           = {0};
   global_t *global                     = global_get_ptr();
   driver_t *driver                     = driver_get_ptr();
   settings_t *settings                 = config_get_ptr();
   struct retro_system_av_info *av_info = video_viewport_get_system_av_info();
   const struct retro_hw_render_callback *hw_render = 
      (const struct retro_hw_render_callback*)video_driver_callback();

   if (!global->record.enable)
      return false;

   if (global->inited.core.type == CORE_TYPE_DUMMY)
   {
      RARCH_WARN(msg_hash_to_str(MSG_USING_LIBRETRO_DUMMY_CORE_RECORDING_SKIPPED));
      return false;
   }

   if (!settings->video.gpu_record && hw_render->context_type)
   {
      RARCH_WARN("%s.\n", msg_hash_to_str(MSG_HW_RENDERED_MUST_USE_POSTSHADED_RECORDING));
      return false;
   }

   RARCH_LOG("%s: FPS: %.4f, Sample rate: %.4f\n",
         msg_hash_to_str(MSG_CUSTOM_TIMING_GIVEN),
         (float)av_info->timing.fps,
         (float)av_info->timing.sample_rate);

   strlcpy(recording_file, global->record.path, sizeof(recording_file));

   if (global->record.use_output_dir)
      fill_pathname_join(recording_file,
            global->record.output_dir,
            global->record.path, sizeof(recording_file));

   params.out_width  = av_info->geometry.base_width;
   params.out_height = av_info->geometry.base_height;
   params.fb_width   = av_info->geometry.max_width;
   params.fb_height  = av_info->geometry.max_height;
   params.channels   = 2;
   params.filename   = recording_file;
   params.fps        = av_info->timing.fps;
   params.samplerate = av_info->timing.sample_rate;
   params.pix_fmt    = (video_driver_get_pixel_format() == RETRO_PIXEL_FORMAT_XRGB8888) ?
      FFEMU_PIX_ARGB8888 : FFEMU_PIX_RGB565;
   params.config     = NULL;
   
   if (*global->record.config)
      params.config = global->record.config;

   if (settings->video.gpu_record && driver->video->read_viewport)
   {
      struct video_viewport vp = {0};

      video_driver_viewport_info(&vp);

      if (!vp.width || !vp.height)
      {
         RARCH_ERR("Failed to get viewport information from video driver. "
               "Cannot start recording ...\n");
         return false;
      }

      params.out_width  = vp.width;
      params.out_height = vp.height;
      params.fb_width   = next_pow2(vp.width);
      params.fb_height  = next_pow2(vp.height);

      if (settings->video.force_aspect &&
            (video_driver_get_aspect_ratio() > 0.0f))
         params.aspect_ratio  = video_driver_get_aspect_ratio();
      else
         params.aspect_ratio  = (float)vp.width / vp.height;

      params.pix_fmt             = FFEMU_PIX_BGR24;
      global->record.gpu_width   = vp.width;
      global->record.gpu_height  = vp.height;

      RARCH_LOG("%s %u x %u\n", msg_hash_to_str(MSG_DETECTED_VIEWPORT_OF),
            vp.width, vp.height);

      global->record.gpu_buffer = (uint8_t*)malloc(vp.width * vp.height * 3);
      if (!global->record.gpu_buffer)
         return false;
   }
   else
   {
      if (global->record.width || global->record.height)
      {
         params.out_width  = global->record.width;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
      case RETRO_ENVIRONMENT_SET_HW_RENDER:
      case RETRO_ENVIRONMENT_SET_HW_RENDER | RETRO_ENVIRONMENT_EXPERIMENTAL:
      {
         struct retro_hw_render_callback *hw_render = video_driver_callback();
         struct retro_hw_render_callback *cb = 
            (struct retro_hw_render_callback*)data;

         RARCH_LOG("Environ SET_HW_RENDER.\n");

         switch (cb->context_type)
         {
            case RETRO_HW_CONTEXT_NONE:
               RARCH_LOG("Requesting no HW context.\n");
               break;

#if defined(HAVE_OPENGLES2)
            case RETRO_HW_CONTEXT_OPENGLES2:
#if defined(HAVE_OPENGLES3)
            case RETRO_HW_CONTEXT_OPENGLES3:
#endif
               RARCH_LOG("Requesting OpenGLES%u context.\n",
                     cb->context_type == RETRO_HW_CONTEXT_OPENGLES2 ? 2 : 3);
               break;

#if defined(HAVE_OPENGLES3)
            case RETRO_HW_CONTEXT_OPENGLES_VERSION:
               RARCH_LOG("Requesting OpenGLES%u.%u context.\n",
                     cb->version_major, cb->version_minor);
               break;
#endif

            case RETRO_HW_CONTEXT_OPENGL:
            case RETRO_HW_CONTEXT_OPENGL_CORE:
               RARCH_ERR("Requesting OpenGL context, but RetroArch is compiled against OpenGLES2. Cannot use HW context.\n");
               return false;
#elif defined(HAVE_OPENGL)
            case RETRO_HW_CONTEXT_OPENGLES2:
            case RETRO_HW_CONTEXT_OPENGLES3:
               RARCH_ERR("Requesting OpenGLES%u context, but RetroArch is compiled against OpenGL. Cannot use HW context.\n",
                     cb->context_type == RETRO_HW_CONTEXT_OPENGLES2 ? 2 : 3);
               return false;

            case RETRO_HW_CONTEXT_OPENGLES_VERSION:
               RARCH_ERR("Requesting OpenGLES%u.%u context, but RetroArch is compiled against OpenGL. Cannot use HW context.\n",
                     cb->version_major, cb->version_minor);
               return false;

            case RETRO_HW_CONTEXT_OPENGL:
               RARCH_LOG("Requesting OpenGL context.\n");
               break;

            case RETRO_HW_CONTEXT_OPENGL_CORE:
               RARCH_LOG("Requesting core OpenGL context (%u.%u).\n",
                     cb->version_major, cb->version_minor);
               break;
#endif

            default:
               RARCH_LOG("Requesting unknown context.\n");
               return false;
         }
         cb->get_current_framebuffer = video_driver_get_current_framebuffer;
         cb->get_proc_address        = video_driver_get_proc_address;

         if (cmd & RETRO_ENVIRONMENT_EXPERIMENTAL) /* Old ABI. Don't copy garbage. */
            memcpy(hw_render,

static bool gfx_ctx_xegl_init(void *data)
{
   static const EGLint egl_attribs_gl[] = {
      XEGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
      EGL_NONE,
   };

   static const EGLint egl_attribs_gles[] = {
      XEGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
      EGL_NONE,
   };

#ifdef EGL_KHR_create_context
   static const EGLint egl_attribs_gles3[] = {
      XEGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT_KHR,
      EGL_NONE,
   };
#endif

   static const EGLint egl_attribs_vg[] = {
      XEGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT,
      EGL_NONE,
   };

   const EGLint *attrib_ptr;
   EGLint major, minor;
   EGLint n;

   if (g_egl_inited)
      return false;

   XInitThreads();

   switch (g_egl_api)
   {
      case GFX_CTX_OPENGL_API:
         attrib_ptr = egl_attribs_gl;
         break;
      case GFX_CTX_OPENGL_ES_API:
#ifdef EGL_KHR_create_context
         if (g_major >= 3)
            attrib_ptr = egl_attribs_gles3;
         else
#endif
            attrib_ptr = egl_attribs_gles;
         break;
      case GFX_CTX_OPENVG_API:
         attrib_ptr = egl_attribs_vg;
         break;
      default:
         attrib_ptr = NULL;
   }

   if (!x11_connect())
      goto error;

   if (!egl_init_context((EGLNativeDisplayType)g_x11_dpy,
            &major, &minor, &n, attrib_ptr))
   {
      egl_report_error();
      goto error;
   }

   if (n == 0 || !g_egl_config)
   {
      RARCH_ERR("[X/EGL]: No EGL configurations available.\n");
      goto error;
   }

   return true;

error:
   gfx_ctx_xegl_destroy(data);
   return false;
}

static void *gfx_ctx_wl_init(void *video_driver)
{
#ifdef HAVE_OPENGL
   static const EGLint egl_attribs_gl[] = {
      WL_EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
      EGL_NONE,
   };
#endif

#ifdef HAVE_OPENGLES
#ifdef HAVE_OPENGLES2
   static const EGLint egl_attribs_gles[] = {
      WL_EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
      EGL_NONE,
   };
#endif

#ifdef HAVE_OPENGLES3
#ifdef EGL_KHR_create_context
   static const EGLint egl_attribs_gles3[] = {
      WL_EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT_KHR,
      EGL_NONE,
   };
#endif
#endif

#endif

#ifdef HAVE_EGL
   static const EGLint egl_attribs_vg[] = {
      WL_EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT,
      EGL_NONE,
   };

   EGLint major = 0, minor = 0;
   EGLint n;
   const EGLint *attrib_ptr = NULL;
#endif
   gfx_ctx_wayland_data_t *wl = (gfx_ctx_wayland_data_t*)
      calloc(1, sizeof(gfx_ctx_wayland_data_t));

   if (!wl)
      return NULL;

   (void)video_driver;

#ifdef HAVE_EGL
   switch (wl_api)
   {
      case GFX_CTX_OPENGL_API:
#ifdef HAVE_OPENGL
         attrib_ptr = egl_attribs_gl;
#endif
         break;
      case GFX_CTX_OPENGL_ES_API:
#ifdef HAVE_OPENGLES
#ifdef HAVE_OPENGLES3
#ifdef EGL_KHR_create_context
         if (g_egl_major >= 3)
            attrib_ptr = egl_attribs_gles3;
         else
#endif
#endif
#ifdef HAVE_OPENGLES2
            attrib_ptr = egl_attribs_gles;
#endif
#endif
         break;
      case GFX_CTX_OPENVG_API:
#ifdef HAVE_VG
         attrib_ptr = egl_attribs_vg;
#endif
         break;
      case GFX_CTX_NONE:
      default:
         break;
   }
#endif

   frontend_driver_destroy_signal_handler_state();

   wl->dpy = wl_display_connect(NULL);
   wl->buffer_scale = 1;

   if (!wl->dpy)
   {
      RARCH_ERR("Failed to connect to Wayland server.\n");
      goto error;
   }

   frontend_driver_install_signal_handler();

   wl->registry = wl_display_get_registry(wl->dpy);
   wl_registry_add_listener(wl->registry, &registry_listener, wl);
   wl_display_roundtrip(wl->dpy);

//.........这里部分代码省略.........

static void *dsound_init(const char *device, unsigned rate, unsigned latency)
{
   WAVEFORMATEX wfx      = {0};
   DSBUFFERDESC bufdesc  = {0};
   struct dsound_dev dev = {0};
   dsound_t          *ds = (dsound_t*)calloc(1, sizeof(*ds));

   if (!ds)
      goto error;

   InitializeCriticalSection(&ds->crit);

   if (device)
      dev.device = strtoul(device, NULL, 0);

   RARCH_LOG("DirectSound devices:\n");
#ifndef _XBOX
   DirectSoundEnumerate(enumerate_cb, &dev);
#endif

   if (DirectSoundCreate(dev.guid, &ds->ds, NULL) != DS_OK)
      goto error;

#ifndef _XBOX
   if (IDirectSound_SetCooperativeLevel(ds->ds, GetDesktopWindow(), DSSCL_PRIORITY) != DS_OK)
      goto error;
#endif

   wfx.wFormatTag        = WAVE_FORMAT_PCM;
   wfx.nChannels         = 2;
   wfx.nSamplesPerSec    = rate;
   wfx.wBitsPerSample    = 16;
   wfx.nBlockAlign       = 2 * sizeof(int16_t);
   wfx.nAvgBytesPerSec   = rate * 2 * sizeof(int16_t);

   ds->buffer_size       = (latency * wfx.nAvgBytesPerSec) / 1000;
   ds->buffer_size      /= CHUNK_SIZE;
   ds->buffer_size      *= CHUNK_SIZE;
   if (ds->buffer_size < 4 * CHUNK_SIZE)
      ds->buffer_size    = 4 * CHUNK_SIZE;

   RARCH_LOG("[DirectSound]: Setting buffer size of %u bytes\n", ds->buffer_size);
   RARCH_LOG("[DirectSound]: Latency = %u ms\n", (unsigned)((1000 * ds->buffer_size) / wfx.nAvgBytesPerSec));

   bufdesc.dwSize        = sizeof(DSBUFFERDESC);
   bufdesc.dwFlags       = 0;
#ifndef _XBOX
   bufdesc.dwFlags       = DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_GLOBALFOCUS;
#endif
   bufdesc.dwBufferBytes = ds->buffer_size;
   bufdesc.lpwfxFormat   = &wfx;

   ds->event = CreateEvent(NULL, false, false, NULL);
   if (!ds->event)
      goto error;

   ds->buffer = fifo_new(4 * 1024);
   if (!ds->buffer)
      goto error;

   if (IDirectSound_CreateSoundBuffer(ds->ds, &bufdesc, &ds->dsb, 0) != DS_OK)
      goto error;

   IDirectSoundBuffer_SetVolume(ds->dsb, DSBVOLUME_MAX);
   IDirectSoundBuffer_SetCurrentPosition(ds->dsb, 0);

   dsound_clear_buffer(ds);

   if (IDirectSoundBuffer_Play(ds->dsb, 0, 0, DSBPLAY_LOOPING) != DS_OK)
      goto error;

   if (!dsound_start_thread(ds))
      goto error;

   return ds;

error:
   RARCH_ERR("[DirectSound] Error occured in init.\n");
   dsound_free(ds);
   return NULL;
}

static void *alsa_thread_init(const char *device,
      unsigned rate, unsigned latency)
{
   alsa_thread_t *alsa = (alsa_thread_t*)calloc(1, sizeof(alsa_thread_t));

   snd_pcm_hw_params_t *params = NULL;
   snd_pcm_sw_params_t *sw_params = NULL;

   const char *alsa_dev = device ? device : "default";

   unsigned latency_usec = latency * 1000 / 2;

   unsigned channels = 2;
   unsigned periods = 4;
   snd_pcm_uframes_t buffer_size;
   snd_pcm_format_t format;

   if (!alsa)
      return NULL;

   TRY_ALSA(snd_pcm_open(&alsa->pcm, alsa_dev, SND_PCM_STREAM_PLAYBACK, 0));

   TRY_ALSA(snd_pcm_hw_params_malloc(&params));
   alsa->has_float = alsathread_find_float_format(alsa->pcm, params);
   format = alsa->has_float ? SND_PCM_FORMAT_FLOAT : SND_PCM_FORMAT_S16;

   TRY_ALSA(snd_pcm_hw_params_any(alsa->pcm, params));
   TRY_ALSA(snd_pcm_hw_params_set_access(
            alsa->pcm, params, SND_PCM_ACCESS_RW_INTERLEAVED));
   TRY_ALSA(snd_pcm_hw_params_set_format(alsa->pcm, params, format));
   TRY_ALSA(snd_pcm_hw_params_set_channels(alsa->pcm, params, channels));
   TRY_ALSA(snd_pcm_hw_params_set_rate(alsa->pcm, params, rate, 0));

   TRY_ALSA(snd_pcm_hw_params_set_buffer_time_near(
            alsa->pcm, params, &latency_usec, NULL));
   TRY_ALSA(snd_pcm_hw_params_set_periods_near(
            alsa->pcm, params, &periods, NULL));

   TRY_ALSA(snd_pcm_hw_params(alsa->pcm, params));

   /* Shouldn't have to bother with this, 
    * but some drivers are apparently broken. */
   if (snd_pcm_hw_params_get_period_size(params, &alsa->period_frames, NULL))
      snd_pcm_hw_params_get_period_size_min(
            params, &alsa->period_frames, NULL);
   RARCH_LOG("ALSA: Period size: %d frames\n", (int)alsa->period_frames);
   if (snd_pcm_hw_params_get_buffer_size(params, &buffer_size))
      snd_pcm_hw_params_get_buffer_size_max(params, &buffer_size);
   RARCH_LOG("ALSA: Buffer size: %d frames\n", (int)buffer_size);

   alsa->buffer_size = snd_pcm_frames_to_bytes(alsa->pcm, buffer_size);
   alsa->period_size = snd_pcm_frames_to_bytes(alsa->pcm, alsa->period_frames);

   TRY_ALSA(snd_pcm_sw_params_malloc(&sw_params));
   TRY_ALSA(snd_pcm_sw_params_current(alsa->pcm, sw_params));
   TRY_ALSA(snd_pcm_sw_params_set_start_threshold(
            alsa->pcm, sw_params, buffer_size / 2));
   TRY_ALSA(snd_pcm_sw_params(alsa->pcm, sw_params));

   snd_pcm_hw_params_free(params);
   snd_pcm_sw_params_free(sw_params);

   alsa->fifo_lock = slock_new();
   alsa->cond_lock = slock_new();
   alsa->cond = scond_new();
   alsa->buffer = fifo_new(alsa->buffer_size);
   if (!alsa->fifo_lock || !alsa->cond_lock || !alsa->cond || !alsa->buffer)
      goto error;

   alsa->worker_thread = sthread_create(alsa_worker_thread, alsa);
   if (!alsa->worker_thread)
   {
      RARCH_ERR("error initializing worker thread");
      goto error;
   }

   return alsa;

error:
   RARCH_ERR("ALSA: Failed to initialize...\n");
   if (params)
      snd_pcm_hw_params_free(params);

   if (sw_params)
      snd_pcm_sw_params_free(sw_params);

   alsa_thread_free(alsa);

   return NULL;
}

static int rarch_main_data_nbio_iterate_poll(nbio_handle_t *nbio)
{
    char elem0[PATH_MAX_LENGTH];
    unsigned elem0_hash          = 0;
    uint32_t cb_type_hash        = 0;
    struct nbio_t* handle        = NULL;
    struct string_list *str_list = NULL;
    const char *path             = NULL;

    if (!nbio)
        return -1;

    path                         = msg_queue_pull(nbio->msg_queue);

    if (!path)
        return -1;

    /* Can only deal with one NBIO transfer at a time for now */
    if (nbio->handle)
        return -1;

    str_list                     = string_split(path, "|");

    if (!str_list || (str_list->size < 1))
        goto error;

    strlcpy(elem0, str_list->elems[0].data, sizeof(elem0));
    elem0_hash = djb2_calculate(elem0);

    /* TODO/FIXME - should be able to deal with this
     * in a better way. */
    switch(elem0_hash)
    {
    case CB_MENU_WALLPAPER:
    case CB_MENU_BOXART:
        goto error;
    default:
        break;
    }

    if (str_list->size > 1)
        cb_type_hash = djb2_calculate(str_list->elems[1].data);

    handle = nbio_open(elem0, NBIO_READ);

    if (!handle)
    {
        RARCH_ERR("Could not create new file loading handle.\n");
        goto error;
    }

    nbio->handle      = handle;
    nbio->is_finished = false;
    nbio->cb          = &cb_nbio_default;

    switch (cb_type_hash)
    {
#if defined(HAVE_MENU) && defined(HAVE_RPNG)
    case CB_MENU_WALLPAPER:
        nbio->cb = &cb_nbio_image_menu_wallpaper;
        break;
    case CB_MENU_BOXART:
        nbio->cb = &cb_nbio_image_menu_boxart;
        break;
#endif
    }

    nbio_begin_read(handle);

    string_list_free(str_list);


    return 0;

error:
    if (str_list)
        string_list_free(str_list);

    return -1;
}

bool config_load_file(const char *path)
{
   config_file_t *conf = NULL;

   if (path)
   {
      conf = config_file_new(path);
      if (!conf)
         return false;
   }
   else
      conf = open_default_config_file();

   if (conf == NULL)
      return true;

   char *save;
   char tmp_append_path[PATH_MAX]; // Don't destroy append_config_path.
   strlcpy(tmp_append_path, g_extern.append_config_path, sizeof(tmp_append_path));
   const char *extra_path = strtok_r(tmp_append_path, ",", &save);
   while (extra_path)
   {
      RARCH_LOG("Appending config \"%s\"\n", extra_path);
      bool ret = config_append_file(conf, extra_path);
      if (!ret)
         RARCH_ERR("Failed to append config \"%s\"\n", extra_path);
      extra_path = strtok_r(NULL, ";", &save);
   }

   if (g_extern.verbose)
   {
      RARCH_LOG_OUTPUT("=== Config ===\n");
      config_file_dump_all(conf, stderr);
      RARCH_LOG_OUTPUT("=== Config end ===\n");
   }

   char tmp_str[PATH_MAX];

   CONFIG_GET_FLOAT(video.xscale, "video_xscale");
   CONFIG_GET_FLOAT(video.yscale, "video_yscale");
   CONFIG_GET_INT(video.fullscreen_x, "video_fullscreen_x");
   CONFIG_GET_INT(video.fullscreen_y, "video_fullscreen_y");

   if (!g_extern.force_fullscreen)
      CONFIG_GET_BOOL(video.fullscreen, "video_fullscreen");

   CONFIG_GET_BOOL(video.windowed_fullscreen, "video_windowed_fullscreen");
   CONFIG_GET_INT(video.monitor_index, "video_monitor_index");
   CONFIG_GET_BOOL(video.disable_composition, "video_disable_composition");
   CONFIG_GET_BOOL(video.vsync, "video_vsync");
   CONFIG_GET_BOOL(video.hard_sync, "video_hard_sync");

   CONFIG_GET_INT(video.hard_sync_frames, "video_hard_sync_frames");
   if (g_settings.video.hard_sync_frames > 3)
      g_settings.video.hard_sync_frames = 3;

   CONFIG_GET_BOOL(video.threaded, "video_threaded");
   CONFIG_GET_BOOL(video.smooth, "video_smooth");
   CONFIG_GET_BOOL(video.force_aspect, "video_force_aspect");
   CONFIG_GET_BOOL(video.scale_integer, "video_scale_integer");
   CONFIG_GET_BOOL(video.crop_overscan, "video_crop_overscan");
   CONFIG_GET_FLOAT(video.aspect_ratio, "video_aspect_ratio");
   CONFIG_GET_INT(video.aspect_ratio_idx, "aspect_ratio_index");
   CONFIG_GET_BOOL(video.aspect_ratio_auto, "video_aspect_ratio_auto");
   CONFIG_GET_FLOAT(video.refresh_rate, "video_refresh_rate");

   CONFIG_GET_PATH(video.shader_path, "video_shader");
   CONFIG_GET_BOOL(video.shader_enable, "video_shader_enable");

   CONFIG_GET_BOOL(video.allow_rotate, "video_allow_rotate");

   CONFIG_GET_PATH(video.font_path, "video_font_path");
   CONFIG_GET_FLOAT(video.font_size, "video_font_size");
   CONFIG_GET_BOOL(video.font_enable, "video_font_enable");
   CONFIG_GET_BOOL(video.font_scale, "video_font_scale");
   CONFIG_GET_FLOAT(video.msg_pos_x, "video_message_pos_x");
   CONFIG_GET_FLOAT(video.msg_pos_y, "video_message_pos_y");

#ifdef RARCH_CONSOLE
   /* TODO - will be refactored later to make it more clean - it's more 
    * important that it works for consoles right now */

   for (unsigned i = 0; i < MAX_PLAYERS; i++)
   {
      char cfg[64];
      snprintf(cfg, sizeof(cfg), "input_dpad_emulation_p%u", i + 1);
      CONFIG_GET_INT(input.dpad_emulation[i], cfg);
      snprintf(cfg, sizeof(cfg), "input_device_p%u", i + 1);
      CONFIG_GET_INT(input.device[i], cfg);
   }

   CONFIG_GET_BOOL_EXTERN(console.screen.gamma_correction, "gamma_correction");

   bool msg_enable = false;
   bool triple_buffering_enable = false;
   bool custom_bgm_enable = false;
   bool flicker_filter_enable = false;
   bool soft_filter_enable = false;

#ifdef HAVE_RMENU
//.........这里部分代码省略.........

static bool gfx_ctx_x_set_video_mode(void *data,
      unsigned width, unsigned height,
      bool fullscreen)
{
   XEvent event;
   bool true_full = false, windowed_full;
   int val, x_off = 0, y_off = 0;
   XVisualInfo *vi = NULL;
   XSetWindowAttributes swa = {0};
   int (*old_handler)(Display*, XErrorEvent*) = NULL;
   settings_t *settings    = config_get_ptr();
   gfx_ctx_x_data_t *x = (gfx_ctx_x_data_t*)data;

   x11_install_sighandlers();

   if (!x)
      return false;

   windowed_full = settings->video.windowed_fullscreen;
   true_full = false;

   switch (x_api)
   {
      case GFX_CTX_OPENGL_API:
      case GFX_CTX_OPENGL_ES_API:
#ifdef HAVE_OPENGL
         vi = glXGetVisualFromFBConfig(g_x11_dpy, x->g_fbc);
         if (!vi)
            goto error;
#endif
         break;

      case GFX_CTX_NONE:
      default:
      {
         XVisualInfo vi_template;
         /* For default case, just try to obtain a visual from template. */
         int nvisuals = 0;

         memset(&vi_template, 0, sizeof(vi_template));
         vi_template.screen = DefaultScreen(g_x11_dpy);
         vi = XGetVisualInfo(g_x11_dpy, VisualScreenMask, &vi_template, &nvisuals);
         if (!vi || nvisuals < 1)
            goto error;
      }
      break;
   }

   swa.colormap = g_x11_cmap = XCreateColormap(g_x11_dpy,
         RootWindow(g_x11_dpy, vi->screen), vi->visual, AllocNone);
   swa.event_mask = StructureNotifyMask | KeyPressMask | KeyReleaseMask |
      ButtonReleaseMask | ButtonPressMask;
   swa.override_redirect = fullscreen ? True : False;

   if (fullscreen && !windowed_full)
   {
      if (x11_enter_fullscreen(g_x11_dpy, width, height, &x->g_desktop_mode))
      {
         x->g_should_reset_mode = true;
         true_full = true;
      }
      else
         RARCH_ERR("[GLX]: Entering true fullscreen failed. Will attempt windowed mode.\n");
   }

   if (settings->video.monitor_index)
      g_x11_screen = settings->video.monitor_index - 1;

#ifdef HAVE_XINERAMA
   if (fullscreen || g_x11_screen != 0)
   {
      unsigned new_width  = width;
      unsigned new_height = height;

      if (x11_get_xinerama_coord(g_x11_dpy, g_x11_screen,
               &x_off, &y_off, &new_width, &new_height))
         RARCH_LOG("[GLX]: Using Xinerama on screen #%u.\n", g_x11_screen);
      else
         RARCH_LOG("[GLX]: Xinerama is not active on screen.\n");

      if (fullscreen)
      {
         width  = new_width;
         height = new_height;
      }
   }
#endif

   RARCH_LOG("[GLX]: X = %d, Y = %d, W = %u, H = %u.\n",
         x_off, y_off, width, height);

   g_x11_win = XCreateWindow(g_x11_dpy, RootWindow(g_x11_dpy, vi->screen),
         x_off, y_off, width, height, 0,
         vi->depth, InputOutput, vi->visual, 
         CWBorderPixel | CWColormap | CWEventMask | 
         (true_full ? CWOverrideRedirect : 0), &swa);
   XSetWindowBackground(g_x11_dpy, g_x11_win, 0);

   switch (x_api)
   {
//.........这里部分代码省略.........

/** 
 * video_shader_parse_imports:
 * @conf              : Preset file to read from.
 * @shader            : Shader passes handle.
 *
 * Resolves import parameters belonging to shaders. 
 *
 * Returns: true (1) if successful, otherwise false (0).
 **/
static bool video_shader_parse_imports(config_file_t *conf,
      struct video_shader *shader)
{
   const char *id     = NULL;
   char *save         = NULL;
   char imports[1024] = {0};

   if (!config_get_array(conf, "imports", imports, sizeof(imports)))
      return true;

   for (id = strtok_r(imports, ";", &save);
         id && shader->variables < GFX_MAX_VARIABLES;
         shader->variables++, id = strtok_r(NULL, ";", &save))
   {
      uint32_t semantic_hash;
      char semantic_buf[64]   = {0};
      char wram_buf[64]       = {0};
      char input_slot_buf[64] = {0};
      char mask_buf[64]       = {0};
      char equal_buf[64]      = {0};
      char semantic[64]       = {0};
      unsigned addr           = 0;
      unsigned mask           = 0;
      unsigned equal          = 0;
      struct state_tracker_uniform_info *var = 
         &shader->variable[shader->variables];

      strlcpy(var->id, id, sizeof(var->id));

      snprintf(semantic_buf, sizeof(semantic_buf), "%s_semantic", id);
      snprintf(wram_buf, sizeof(wram_buf), "%s_wram", id);
      snprintf(input_slot_buf, sizeof(input_slot_buf), "%s_input_slot", id);
      snprintf(mask_buf, sizeof(mask_buf), "%s_mask", id);
      snprintf(equal_buf, sizeof(equal_buf), "%s_equal", id);

      if (!config_get_array(conf, semantic_buf, semantic, sizeof(semantic)))
      {
         RARCH_ERR("No semantic for import variable.\n");
         return false;
      }

      semantic_hash = djb2_calculate(semantic);

      switch (semantic_hash)
      {
         case SEMANTIC_CAPTURE:
            var->type = RARCH_STATE_CAPTURE;
            break;
         case SEMANTIC_TRANSITION:
            var->type = RARCH_STATE_TRANSITION;
            break;
         case SEMANTIC_TRANSITION_COUNT:
            var->type = RARCH_STATE_TRANSITION_COUNT;
            break;
         case SEMANTIC_CAPTURE_PREVIOUS:
            var->type = RARCH_STATE_CAPTURE_PREV;
            break;
         case SEMANTIC_TRANSITION_PREVIOUS:
            var->type = RARCH_STATE_TRANSITION_PREV;
            break;
         case SEMANTIC_PYTHON:
            var->type = RARCH_STATE_PYTHON;
            break;
         default:
            RARCH_ERR("Invalid semantic.\n");
            return false;
      }


      if (var->type != RARCH_STATE_PYTHON)
      {
         unsigned input_slot = 0;

         if (config_get_uint(conf, input_slot_buf, &input_slot))
         {
            switch (input_slot)
            {
               case 1:
                  var->ram_type = RARCH_STATE_INPUT_SLOT1;
                  break;

               case 2:
                  var->ram_type = RARCH_STATE_INPUT_SLOT2;
                  break;

               default:
                  RARCH_ERR("Invalid input slot for import.\n");
                  return false;
            }
         }
         else if (config_get_hex(conf, wram_buf, &addr))
//.........这里部分代码省略.........

/** 
 * video_shader_parse_pass:
 * @conf              : Preset file to read from.
 * @pass              : Shader passes handle.
 * @i                 : Index of shader pass.
 *
 * Parses shader pass from preset file.
 *
 * Returns: true (1) if successful, otherwise false (0).
 **/
static bool video_shader_parse_pass(config_file_t *conf, struct video_shader_pass *pass, unsigned i)
{
   char shader_name[64]         = {0};
   char filter_name_buf[64]     = {0};
   char wrap_name_buf[64]       = {0};
   char wrap_mode[64]           = {0};
   char frame_count_mod_buf[64] = {0};
   char srgb_output_buf[64]     = {0};
   char fp_fbo_buf[64]          = {0};
   char mipmap_buf[64]          = {0};
   char alias_buf[64]           = {0};
   char scale_name_buf[64]      = {0};
   char attr_name_buf[64]       = {0};
   char scale_type[64]          = {0};
   char scale_type_x[64]        = {0};
   char scale_type_y[64]        = {0};
   char frame_count_mod[64]     = {0};
   struct gfx_fbo_scale *scale  = NULL;
   bool smooth                  = false;
   float fattr                  = 0.0f;
   int iattr                    = 0;

   /* Source */
   snprintf(shader_name, sizeof(shader_name), "shader%u", i);
   if (!config_get_path(conf, shader_name, pass->source.path, sizeof(pass->source.path)))
   {
      RARCH_ERR("Couldn't parse shader source (%s).\n", shader_name);
      return false;
   }
   
   /* Smooth */
   snprintf(filter_name_buf, sizeof(filter_name_buf), "filter_linear%u", i);
   if (config_get_bool(conf, filter_name_buf, &smooth))
      pass->filter = smooth ? RARCH_FILTER_LINEAR : RARCH_FILTER_NEAREST;
   else
      pass->filter = RARCH_FILTER_UNSPEC;

   /* Wrapping mode */
   snprintf(wrap_name_buf, sizeof(wrap_name_buf), "wrap_mode%u", i);
   if (config_get_array(conf, wrap_name_buf, wrap_mode, sizeof(wrap_mode)))
      pass->wrap = wrap_str_to_mode(wrap_mode);

   /* Frame count mod */
   snprintf(frame_count_mod_buf, sizeof(frame_count_mod_buf), "frame_count_mod%u", i);
   if (config_get_array(conf, frame_count_mod_buf,
            frame_count_mod, sizeof(frame_count_mod)))
      pass->frame_count_mod = strtoul(frame_count_mod, NULL, 0);

   /* FBO types and mipmapping */
   snprintf(srgb_output_buf, sizeof(srgb_output_buf), "srgb_framebuffer%u", i);
   config_get_bool(conf, srgb_output_buf, &pass->fbo.srgb_fbo);

   snprintf(fp_fbo_buf, sizeof(fp_fbo_buf), "float_framebuffer%u", i);
   config_get_bool(conf, fp_fbo_buf, &pass->fbo.fp_fbo);

   snprintf(mipmap_buf, sizeof(mipmap_buf), "mipmap_input%u", i);
   config_get_bool(conf, mipmap_buf, &pass->mipmap);

   snprintf(alias_buf, sizeof(alias_buf), "alias%u", i);
   if (!config_get_array(conf, alias_buf, pass->alias, sizeof(pass->alias)))
      *pass->alias = '\0';

   /* Scale */
   scale = &pass->fbo;
   snprintf(scale_name_buf, sizeof(scale_name_buf), "scale_type%u", i);
   config_get_array(conf, scale_name_buf, scale_type, sizeof(scale_type));

   snprintf(scale_name_buf, sizeof(scale_name_buf), "scale_type_x%u", i);
   config_get_array(conf, scale_name_buf, scale_type_x, sizeof(scale_type_x));

   snprintf(scale_name_buf, sizeof(scale_name_buf), "scale_type_y%u", i);
   config_get_array(conf, scale_name_buf, scale_type_y, sizeof(scale_type_y));

   if (!*scale_type && !*scale_type_x && !*scale_type_y)
      return true;

   if (*scale_type)
   {
      strlcpy(scale_type_x, scale_type, sizeof(scale_type_x));
      strlcpy(scale_type_y, scale_type, sizeof(scale_type_y));
   }

   scale->valid   = true;
   scale->type_x  = RARCH_SCALE_INPUT;
   scale->type_y  = RARCH_SCALE_INPUT;
   scale->scale_x = 1.0;
   scale->scale_y = 1.0;

   if (*scale_type_x)
   {
//.........这里部分代码省略.........

static void *sl_init(const char *device, unsigned rate, unsigned latency)
{
   unsigned i;
   (void)device;

   SLDataFormat_PCM fmt_pcm = {0};
   SLDataSource audio_src   = {0};
   SLDataSink audio_sink    = {0};

   SLDataLocator_AndroidSimpleBufferQueue loc_bufq = {0};
   SLDataLocator_OutputMix loc_outmix              = {0};

   SLInterfaceID id = SL_IID_ANDROIDSIMPLEBUFFERQUEUE;
   SLboolean req    = SL_BOOLEAN_TRUE;

   SLresult res = 0;
   sl_t *sl = (sl_t*)calloc(1, sizeof(sl_t));
   if (!sl)
      goto error;

   RARCH_LOG("[SLES]: Requested audio latency: %u ms.", latency);

   GOTO_IF_FAIL(slCreateEngine(&sl->engine_object, 0, NULL, 0, NULL, NULL));
   GOTO_IF_FAIL(SLObjectItf_Realize(sl->engine_object, SL_BOOLEAN_FALSE));
   GOTO_IF_FAIL(SLObjectItf_GetInterface(sl->engine_object, SL_IID_ENGINE, &sl->engine));

   GOTO_IF_FAIL(SLEngineItf_CreateOutputMix(sl->engine, &sl->output_mix, 0, NULL, NULL));
   GOTO_IF_FAIL(SLObjectItf_Realize(sl->output_mix, SL_BOOLEAN_FALSE));

   if (g_settings.audio.block_frames)
      sl->buf_size = g_settings.audio.block_frames * 4;
   else
      sl->buf_size = next_pow2(32 * latency);

   sl->buf_count = (latency * 4 * rate + 500) / 1000;
   sl->buf_count = (sl->buf_count + sl->buf_size / 2) / sl->buf_size;

   sl->buffer = (uint8_t**)calloc(sizeof(uint8_t*), sl->buf_count);
   if (!sl->buffer)
      goto error;

   sl->buffer_chunk = (uint8_t*)calloc(sl->buf_count, sl->buf_size);
   if (!sl->buffer_chunk)
      goto error;

   for (i = 0; i < sl->buf_count; i++)
      sl->buffer[i] = sl->buffer_chunk + i * sl->buf_size;

   RARCH_LOG("[SLES]: Setting audio latency: Block size = %u, Blocks = %u, Total = %u ...\n",
         sl->buf_size, sl->buf_count, sl->buf_size * sl->buf_count);

   fmt_pcm.formatType    = SL_DATAFORMAT_PCM;
   fmt_pcm.numChannels   = 2;
   fmt_pcm.samplesPerSec = rate * 1000; // Samplerate is in milli-Hz.
   fmt_pcm.bitsPerSample = 16;
   fmt_pcm.containerSize = 16;
   fmt_pcm.channelMask   = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
   fmt_pcm.endianness    = SL_BYTEORDER_LITTLEENDIAN; // Android only.

   audio_src.pLocator = &loc_bufq;
   audio_src.pFormat  = &fmt_pcm;

   loc_bufq.locatorType = SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE;
   loc_bufq.numBuffers  = sl->buf_count;

   loc_outmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
   loc_outmix.outputMix   = sl->output_mix;

   audio_sink.pLocator = &loc_outmix;

   GOTO_IF_FAIL(SLEngineItf_CreateAudioPlayer(sl->engine, &sl->buffer_queue_object,
            &audio_src, &audio_sink,
            1, &id, &req));
   GOTO_IF_FAIL(SLObjectItf_Realize(sl->buffer_queue_object, SL_BOOLEAN_FALSE));

   GOTO_IF_FAIL(SLObjectItf_GetInterface(sl->buffer_queue_object, SL_IID_ANDROIDSIMPLEBUFFERQUEUE,
            &sl->buffer_queue));

   sl->cond = scond_new();
   sl->lock = slock_new();

   (*sl->buffer_queue)->RegisterCallback(sl->buffer_queue, opensl_callback, sl);

   // Enqueue a bit to get stuff rolling.
   sl->buffered_blocks = sl->buf_count;
   sl->buffer_index = 0;
   for (i = 0; i < sl->buf_count; i++)
      (*sl->buffer_queue)->Enqueue(sl->buffer_queue, sl->buffer[i], sl->buf_size);

   GOTO_IF_FAIL(SLObjectItf_GetInterface(sl->buffer_queue_object, SL_IID_PLAY, &sl->player));
   GOTO_IF_FAIL(SLPlayItf_SetPlayState(sl->player, SL_PLAYSTATE_PLAYING));

   return sl;

error:
   RARCH_ERR("Couldn't initialize OpenSL ES driver, error code: [%d].\n", (int)res);
   sl_free(sl);
   return NULL;
}

//.........这里部分代码省略.........
            event_command(EVENT_CMD_REWIND_INIT);
         else
            event_command(EVENT_CMD_REWIND_DEINIT);
         break;
      case EVENT_CMD_AUTOSAVE_DEINIT:
#ifdef HAVE_THREADS
         event_deinit_autosave();
#endif
         break;
      case EVENT_CMD_AUTOSAVE_INIT:
         event_command(EVENT_CMD_AUTOSAVE_DEINIT);
#ifdef HAVE_THREADS
         event_init_autosave();
#endif
         break;
      case EVENT_CMD_AUTOSAVE_STATE:
         event_save_auto_state();
         break;
      case EVENT_CMD_AUDIO_STOP:
         if (!driver->audio_data)
            return false;
         if (!audio_driver_alive())
            return false;

         if (!audio_driver_stop())
            return false;
         break;
      case EVENT_CMD_AUDIO_START:
         if (!driver->audio_data || audio_driver_alive())
            return false;

         if (!settings->audio.mute_enable && !audio_driver_start())
         {
            RARCH_ERR("Failed to start audio driver. Will continue without audio.\n");
            driver->audio_active = false;
         }
         break;
      case EVENT_CMD_AUDIO_MUTE_TOGGLE:
         {
            const char *msg = !settings->audio.mute_enable ?
               msg_hash_to_str(MSG_AUDIO_MUTED):
               msg_hash_to_str(MSG_AUDIO_UNMUTED);

            if (!audio_driver_mute_toggle())
            {
               RARCH_ERR("%s.\n",
                     msg_hash_to_str(MSG_FAILED_TO_UNMUTE_AUDIO));
               return false;
            }

            rarch_main_msg_queue_push(msg, 1, 180, true);
            RARCH_LOG("%s\n", msg);
         }
         break;
      case EVENT_CMD_OVERLAY_DEINIT:
#ifdef HAVE_OVERLAY
         input_overlay_free_ptr();
#endif
         break;
      case EVENT_CMD_OVERLAY_INIT:
         event_command(EVENT_CMD_OVERLAY_DEINIT);
#ifdef HAVE_OVERLAY
         if (input_overlay_new_ptr() == -1)
            RARCH_ERR("%s.\n", msg_hash_to_str(MSG_FAILED_TO_LOAD_OVERLAY));
#endif
         break;