MEDIA_ENTITY_TYPE_VIDEO_DEVICE 760 drivers/media/v4l2-core/v4l2-dev.c vdev->entity.obj_type = MEDIA_ENTITY_TYPE_VIDEO_DEVICE; MEDIA_ENTITY_TYPE_VIDEO_DEVICE 413 include/media/media-entity.h return entity && entity->obj_type == MEDIA_ENTITY_TYPE_VIDEO_DEVICE;