-FORWARD3(caspar, core, ogl, class accelerator);
-FORWARD2(caspar, core, class stage);
-FORWARD2(caspar, core, class mixer);
-FORWARD2(caspar, core, class output);
-FORWARD2(caspar, core, class image_mixer);
-FORWARD2(caspar, core, struct video_format_desc);
-FORWARD2(caspar, core, class frame_factory);
-