uvideo_unit_alloc_sources
static void uvideo_unit_alloc_sources(struct uvideo_unit *,
uvideo_unit_alloc_sources(vu, selector->bNrInPins,
uvideo_unit_alloc_sources(vu, 1, &processing->bSourceID);
uvideo_unit_alloc_sources(vu, extension->bNrInPins,