Data type of USB Sockets. 
- Enumerator: 
- 
| UCS_USB_SCKT_SYNC_DATA | Specifies the synchronous streaming data type.  |  | UCS_USB_SCKT_CONTROL_DATA | Specifies the control data type.  |  | UCS_USB_SCKT_AV_PACKETIZED | Specifies the A/V Packetized Isochronous streaming data type.  |  | UCS_USB_SCKT_IPC_PACKET | Specifies the IPC packet data type.  |