usbvc_open_isoc_pipe
if (usbvc_open_isoc_pipe(usbvcp, strm_if) != USB_SUCCESS) {
if (usbvc_open_isoc_pipe(usbvcp, strm_if) !=
int usbvc_open_isoc_pipe(usbvc_state_t *, usbvc_stream_if_t *);