usb_video_vc_processing_desc
int uvideo_has_ctrl(struct usb_video_vc_processing_desc *, int);
struct usb_video_vc_processing_desc *d;
struct usb_video_vc_processing_desc *d;
struct usb_video_vc_processing_desc *sc_desc_vc_pu_cur;
struct usb_video_vc_processing_desc *sc_desc_vc_pu[UVIDEO_MAX_PU];
uvideo_has_ctrl(struct usb_video_vc_processing_desc *desc, int ctrl_bit)