/****************************************************************************** Copyright (C) 2013 by Hugh Bailey This program 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 Foundation, either version 2 of the License, or (at your option) any later version. This program 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 this program. If not, see . ******************************************************************************/ #include "util/platform.h" #include "util/dstr.h" #include "obs-defs.h" #include "obs-internal.h" #include "obs-module.h" extern char *find_plugin(const char *plugin); /* These variables get the current size of the info structures. Used to * automatically prevent API breakage in case functions have to be added */ static size_t cur_source_info_size = 0; static size_t cur_output_info_size = 0; static size_t cur_encoder_info_size = 0; static size_t cur_service_info_size = 0; static size_t cur_modal_ui_size = 0; static size_t cur_modeless_ui_size = 0; static inline int req_func_not_found(const char *name, const char *path) { blog(LOG_WARNING, "Required module function '%s' in module '%s' not " "found, loading of module failed", name, path); return MODULE_FUNCTION_NOT_FOUND; } #define LOAD_REQ_SIZE_FUNC(func, module, path) \ func = os_dlsym(module, #func); \ if (!func) \ return req_func_not_found(#func, path) static int call_module_load(void *module, const char *path) { bool (*obs_module_load)(uint32_t obs_ver) = NULL; size_t (*obs_module_source_info_size)(void) = NULL; size_t (*obs_module_output_info_size)(void) = NULL; size_t (*obs_module_encoder_info_size)(void) = NULL; size_t (*obs_module_service_info_size)(void) = NULL; size_t (*obs_module_modal_ui_size)(void) = NULL; size_t (*obs_module_modeless_ui_size)(void) = NULL; obs_module_load = os_dlsym(module, "obs_module_load"); if (!obs_module_load) return req_func_not_found("obs_module_load", path); LOAD_REQ_SIZE_FUNC(obs_module_source_info_size, module, path); LOAD_REQ_SIZE_FUNC(obs_module_output_info_size, module, path); LOAD_REQ_SIZE_FUNC(obs_module_encoder_info_size, module, path); LOAD_REQ_SIZE_FUNC(obs_module_service_info_size, module, path); LOAD_REQ_SIZE_FUNC(obs_module_modal_ui_size, module, path); LOAD_REQ_SIZE_FUNC(obs_module_modeless_ui_size, module, path); cur_source_info_size = obs_module_source_info_size(); cur_output_info_size = obs_module_output_info_size(); cur_encoder_info_size = obs_module_encoder_info_size(); cur_service_info_size = obs_module_service_info_size(); cur_modal_ui_size = obs_module_modal_ui_size(); cur_modeless_ui_size = obs_module_modeless_ui_size(); if (!obs_module_load(LIBOBS_API_VER)) { blog(LOG_WARNING, "Module '%s' failed to load: " "obs_module_load failed", path); return MODULE_ERROR; } cur_source_info_size = 0; cur_output_info_size = 0; cur_encoder_info_size = 0; cur_service_info_size = 0; cur_modal_ui_size = 0; cur_modeless_ui_size = 0; return MODULE_SUCCESS; } int obs_load_module(const char *path) { struct obs_module mod; char *plugin_path = find_plugin(path); int errorcode; mod.module = os_dlopen(plugin_path); bfree(plugin_path); if (!mod.module) return MODULE_FILE_NOT_FOUND; errorcode = call_module_load(mod.module, path); if (errorcode != MODULE_SUCCESS) { os_dlclose(mod.module); return errorcode; } mod.name = bstrdup(path); da_push_back(obs->modules, &mod); return MODULE_SUCCESS; } void free_module(struct obs_module *mod) { if (!mod) return; if (mod->module) { void (*module_unload)(void); module_unload = os_dlsym(mod->module, "module_unload"); if (module_unload) module_unload(); os_dlclose(mod->module); } bfree(mod->name); } void obs_register_source(const struct obs_source_info *info) { struct obs_source_info data = {0}; struct darray *array; if (!cur_source_info_size) { blog(LOG_WARNING, "Tried to register obs_source_info" " outside of obs_module_load"); return; } memcpy(&data, info, cur_source_info_size); if (info->type == OBS_SOURCE_TYPE_INPUT) { array = &obs->input_types.da; } else if (info->type == OBS_SOURCE_TYPE_FILTER) { array = &obs->filter_types.da; } else if (info->type == OBS_SOURCE_TYPE_TRANSITION) { array = &obs->transition_types.da; } else { blog(LOG_WARNING, "Tried to register unknown source type: %u", info->type); return; } darray_push_back(sizeof(struct obs_source_info), array, &data); } #define REGISTER_OBS_DEF(size_var, structure, dest, info) \ do { \ struct structure data = {0}; \ if (!size_var) { \ blog(LOG_WARNING, "Tried to register " #structure \ " outside of obs_module_load"); \ return; \ } \ \ memcpy(&data, info, size_var); \ da_push_back(dest, &data); \ } while (false) #define CHECK_REQUIRED_VAL(info, val, func) \ do { \ if (!info->val) {\ blog(LOG_WARNING, "Required value '" #val " for" \ "'%s' not found. " #func \ " failed.", \ info->id);\ return; \ } \ } while (false) void obs_register_output(const struct obs_output_info *info) { CHECK_REQUIRED_VAL(info, getname, obs_register_output); CHECK_REQUIRED_VAL(info, create, obs_register_output); CHECK_REQUIRED_VAL(info, destroy, obs_register_output); CHECK_REQUIRED_VAL(info, start, obs_register_output); CHECK_REQUIRED_VAL(info, stop, obs_register_output); CHECK_REQUIRED_VAL(info, active, obs_register_output); REGISTER_OBS_DEF(cur_output_info_size, obs_output_info, obs->output_types, info); } void obs_register_encoder(const struct obs_encoder_info *info) { CHECK_REQUIRED_VAL(info, getname, obs_register_encoder); CHECK_REQUIRED_VAL(info, create, obs_register_encoder); CHECK_REQUIRED_VAL(info, destroy, obs_register_encoder); CHECK_REQUIRED_VAL(info, reset, obs_register_encoder); CHECK_REQUIRED_VAL(info, encode, obs_register_encoder); REGISTER_OBS_DEF(cur_encoder_info_size, obs_encoder_info, obs->encoder_types, info); } void obs_register_service(const struct obs_service_info *info) { /* TODO */ #pragma message ("TODO: implement obs_register_service") UNUSED_PARAMETER(info); } void obs_regsiter_modal_ui(const struct obs_modal_ui *info) { CHECK_REQUIRED_VAL(info, task, obs_regsiter_modal_ui); CHECK_REQUIRED_VAL(info, target, obs_regsiter_modal_ui); CHECK_REQUIRED_VAL(info, exec, obs_regsiter_modal_ui); REGISTER_OBS_DEF(cur_modal_ui_size, obs_modal_ui, obs->modal_ui_callbacks, info); } void obs_regsiter_modeless_ui(const struct obs_modeless_ui *info) { CHECK_REQUIRED_VAL(info, task, obs_regsiter_modeless_ui); CHECK_REQUIRED_VAL(info, target, obs_regsiter_modeless_ui); CHECK_REQUIRED_VAL(info, create, obs_regsiter_modeless_ui); REGISTER_OBS_DEF(cur_modeless_ui_size, obs_modeless_ui, obs->modeless_ui_callbacks, info); }