mirror of
https://github.com/obsproject/obs-studio.git
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241 lines
7.7 KiB
C
241 lines
7.7 KiB
C
/******************************************************************************
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Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#include "util/platform.h"
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#include "util/dstr.h"
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#include "obs-defs.h"
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#include "obs-internal.h"
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#include "obs-module.h"
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extern char *find_plugin(const char *plugin);
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/* These variables get the current size of the info structures. Used to
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* automatically prevent API breakage in case functions have to be added */
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static size_t cur_source_info_size = 0;
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static size_t cur_output_info_size = 0;
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static size_t cur_encoder_info_size = 0;
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static size_t cur_service_info_size = 0;
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static size_t cur_modal_ui_size = 0;
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static size_t cur_modeless_ui_size = 0;
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static inline int req_func_not_found(const char *name, const char *path)
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{
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blog(LOG_WARNING, "Required module function '%s' in module '%s' not "
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"found, loading of module failed",
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name, path);
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return MODULE_FUNCTION_NOT_FOUND;
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}
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#define LOAD_REQ_SIZE_FUNC(func, module, path) \
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func = os_dlsym(module, #func); \
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if (!func) \
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return req_func_not_found(#func, path)
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static int call_module_load(void *module, const char *path)
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{
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bool (*obs_module_load)(uint32_t obs_ver) = NULL;
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size_t (*obs_module_source_info_size)(void) = NULL;
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size_t (*obs_module_output_info_size)(void) = NULL;
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size_t (*obs_module_encoder_info_size)(void) = NULL;
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size_t (*obs_module_service_info_size)(void) = NULL;
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size_t (*obs_module_modal_ui_size)(void) = NULL;
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size_t (*obs_module_modeless_ui_size)(void) = NULL;
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obs_module_load = os_dlsym(module, "obs_module_load");
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if (!obs_module_load)
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return req_func_not_found("obs_module_load", path);
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LOAD_REQ_SIZE_FUNC(obs_module_source_info_size, module, path);
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LOAD_REQ_SIZE_FUNC(obs_module_output_info_size, module, path);
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LOAD_REQ_SIZE_FUNC(obs_module_encoder_info_size, module, path);
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LOAD_REQ_SIZE_FUNC(obs_module_service_info_size, module, path);
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LOAD_REQ_SIZE_FUNC(obs_module_modal_ui_size, module, path);
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LOAD_REQ_SIZE_FUNC(obs_module_modeless_ui_size, module, path);
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cur_source_info_size = obs_module_source_info_size();
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cur_output_info_size = obs_module_output_info_size();
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cur_encoder_info_size = obs_module_encoder_info_size();
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cur_service_info_size = obs_module_service_info_size();
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cur_modal_ui_size = obs_module_modal_ui_size();
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cur_modeless_ui_size = obs_module_modeless_ui_size();
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if (!obs_module_load(LIBOBS_API_VER)) {
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blog(LOG_WARNING, "Module '%s' failed to load: "
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"obs_module_load failed", path);
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return MODULE_ERROR;
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}
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cur_source_info_size = 0;
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cur_output_info_size = 0;
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cur_encoder_info_size = 0;
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cur_service_info_size = 0;
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cur_modal_ui_size = 0;
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cur_modeless_ui_size = 0;
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return MODULE_SUCCESS;
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}
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int obs_load_module(const char *path)
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{
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struct obs_module mod;
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char *plugin_path = find_plugin(path);
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int errorcode;
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mod.module = os_dlopen(plugin_path);
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bfree(plugin_path);
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if (!mod.module)
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return MODULE_FILE_NOT_FOUND;
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errorcode = call_module_load(mod.module, path);
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if (errorcode != MODULE_SUCCESS) {
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os_dlclose(mod.module);
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return errorcode;
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}
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mod.name = bstrdup(path);
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da_push_back(obs->modules, &mod);
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return MODULE_SUCCESS;
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}
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void free_module(struct obs_module *mod)
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{
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if (!mod)
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return;
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if (mod->module) {
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void (*module_unload)(void);
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module_unload = os_dlsym(mod->module, "module_unload");
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if (module_unload)
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module_unload();
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os_dlclose(mod->module);
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}
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bfree(mod->name);
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}
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void obs_register_source(const struct obs_source_info *info)
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{
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struct obs_source_info data = {0};
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struct darray *array;
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if (!info) {
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blog(LOG_WARNING, "obs_register_source: NULL info");
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return;
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}
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if (!cur_source_info_size) {
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blog(LOG_WARNING, "Tried to register obs_source_info"
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" outside of obs_module_load");
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return;
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}
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memcpy(&data, info, cur_source_info_size);
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if (info->type == OBS_SOURCE_TYPE_INPUT) {
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array = &obs->input_types.da;
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} else if (info->type == OBS_SOURCE_TYPE_FILTER) {
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array = &obs->filter_types.da;
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} else if (info->type == OBS_SOURCE_TYPE_TRANSITION) {
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array = &obs->transition_types.da;
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} else {
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blog(LOG_WARNING, "Tried to register unknown source type: %u",
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info->type);
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return;
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}
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darray_push_back(sizeof(struct obs_source_info), array, &data);
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}
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#define REGISTER_OBS_DEF(size_var, structure, dest, info) \
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do { \
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struct structure data = {0}; \
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if (!size_var) { \
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blog(LOG_WARNING, "Tried to register " #structure \
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" outside of obs_module_load"); \
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return; \
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} \
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\
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memcpy(&data, info, size_var); \
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da_push_back(dest, &data); \
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} while (false)
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#define CHECK_REQUIRED_VAL(info, val, func) \
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do { \
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if (!info->val) {\
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blog(LOG_WARNING, "Required value '" #val " for" \
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"'%s' not found. " #func \
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" failed.", \
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info->id);\
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return; \
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} \
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} while (false)
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void obs_register_output(const struct obs_output_info *info)
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{
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CHECK_REQUIRED_VAL(info, getname, obs_register_output);
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CHECK_REQUIRED_VAL(info, create, obs_register_output);
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CHECK_REQUIRED_VAL(info, destroy, obs_register_output);
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CHECK_REQUIRED_VAL(info, start, obs_register_output);
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CHECK_REQUIRED_VAL(info, stop, obs_register_output);
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CHECK_REQUIRED_VAL(info, active, obs_register_output);
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REGISTER_OBS_DEF(cur_output_info_size, obs_output_info,
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obs->output_types, info);
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}
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void obs_register_encoder(const struct obs_encoder_info *info)
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{
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CHECK_REQUIRED_VAL(info, getname, obs_register_encoder);
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CHECK_REQUIRED_VAL(info, create, obs_register_encoder);
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CHECK_REQUIRED_VAL(info, destroy, obs_register_encoder);
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CHECK_REQUIRED_VAL(info, reset, obs_register_encoder);
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CHECK_REQUIRED_VAL(info, encode, obs_register_encoder);
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REGISTER_OBS_DEF(cur_encoder_info_size, obs_encoder_info,
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obs->encoder_types, info);
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}
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void obs_register_service(const struct obs_service_info *info)
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{
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/* TODO */
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#pragma message ("TODO: implement obs_register_service")
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UNUSED_PARAMETER(info);
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}
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void obs_regsiter_modal_ui(const struct obs_modal_ui *info)
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{
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CHECK_REQUIRED_VAL(info, task, obs_regsiter_modal_ui);
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CHECK_REQUIRED_VAL(info, target, obs_regsiter_modal_ui);
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CHECK_REQUIRED_VAL(info, exec, obs_regsiter_modal_ui);
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REGISTER_OBS_DEF(cur_modal_ui_size, obs_modal_ui,
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obs->modal_ui_callbacks, info);
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}
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void obs_regsiter_modeless_ui(const struct obs_modeless_ui *info)
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{
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CHECK_REQUIRED_VAL(info, task, obs_regsiter_modeless_ui);
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CHECK_REQUIRED_VAL(info, target, obs_regsiter_modeless_ui);
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CHECK_REQUIRED_VAL(info, create, obs_regsiter_modeless_ui);
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REGISTER_OBS_DEF(cur_modeless_ui_size, obs_modeless_ui,
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obs->modeless_ui_callbacks, info);
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}
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