obs_reset_video功能模块图

OBS应用调用libobs中的obs_reset_video函数来初始化图形渲染。

• main-QT入口函数
  • int run_program(fstream &logFile, int argc, char *argv[])
    • OBSBasic::OBSInit()
      • int OBSBasic::ResetVideo()
        • int AttemptToResetVideo(struct obs_video_info *ovi)
        • ———libobs———-
          • int obs_reset_video(struct obs_video_info *ovi)
            • int obs_init_graphics(ovi);
              • gs_create //加载d3d11dll，获取导出函数，创建d3d11设备对象等
                • os_dlopen
                • load_graphics_imports
                • device_create
                • graphics_init
                  • graphics_init_immediate_vb
                  • graphics_init_sprite_vb
                  • cur_blend_state
              • gs_effect_create_from_file //解析编译HLSL文件等
              • 创建transparent_texture
            • int obs_init_video(struct obs_video_info *ovi)
              • set_video_matrix
              • video_output_open
              • obs_init_gpu_conversion
              • obs_init_textures
              • pthread_create(obs_graphics_thread)