关于UVC相机驱动信息配置的一些总结

UVC相机驱动信息主要包括两大类：分别为USB信息获取和系统信息获取。

USB信息获取

USB信息包括设备描述符、配置描述符、字符串描述符及配置选择，接口选择及UVC特定类请求等。这些信息都是通过IRP_MJ_INTERNAL_DEVICE_CONTROL请求实现的。
其具体对应的是IRP_MJ_INTERNAL_DEVICE_CONTROL控制请求，其控制码为IOCTL_INTERNAL_USB_SUBMIT_URB。
当控制码为IOCTL_INTERNAL_USB_SUBMIT_URB时，其IRP当前IO_STACK_LOCATION对构体成员>Parameters.Others.Argument1参数解析为URB指针。

 PIO_STACK_LOCATION IoStack = IoGetCurrentIrpStackLocation(Irp);
 if (IoStack->Parameters.DeviceIoControl.IoControlCode == IOCTL_INTERNAL_USB_SUBMIT_URB)
 {
     PURB Urb = (PURB)IoStack->Parameters.Others.Argument1;
 }

URB是USB请求包，其又根据成员Function的功能号又区分为同的USB请求。

USHORT function = Urb->UrbHeader.Function;

这些请求码的值可能为：

//
//  URB request codes
//

#define URB_FUNCTION_SELECT_CONFIGURATION            0x0000
#define URB_FUNCTION_SELECT_INTERFACE                0x0001
#define URB_FUNCTION_ABORT_PIPE                      0x0002
#define URB_FUNCTION_TAKE_FRAME_LENGTH_CONTROL       0x0003
#define URB_FUNCTION_RELEASE_FRAME_LENGTH_CONTROL    0x0004
#define URB_FUNCTION_GET_FRAME_LENGTH                0x0005
#define URB_FUNCTION_SET_FRAME_LENGTH                0x0006
#define URB_FUNCTION_GET_CURRENT_FRAME_NUMBER        0x0007
#define URB_FUNCTION_CONTROL_TRANSFER                0x0008
#define URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER      0x0009
#define URB_FUNCTION_ISOCH_TRANSFER                  0x000A
#define URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE      0x000B
#define URB_FUNCTION_SET_DESCRIPTOR_TO_DEVICE        0x000C
#define URB_FUNCTION_SET_FEATURE_TO_DEVICE           0x000D
#define URB_FUNCTION_SET_FEATURE_TO_INTERFACE        0x000E
#define URB_FUNCTION_SET_FEATURE_TO_ENDPOINT         0x000F
#define URB_FUNCTION_CLEAR_FEATURE_TO_DEVICE         0x0010
#define URB_FUNCTION_CLEAR_FEATURE_TO_INTERFACE      0x0011
#define URB_FUNCTION_CLEAR_FEATURE_TO_ENDPOINT       0x0012
#define URB_FUNCTION_GET_STATUS_FROM_DEVICE          0x0013
#define URB_FUNCTION_GET_STATUS_FROM_INTERFACE       0x0014
#define URB_FUNCTION_GET_STATUS_FROM_ENDPOINT        0x0015
#define URB_FUNCTION_RESERVED_0X0016                 0x0016
#define URB_FUNCTION_VENDOR_DEVICE                   0x0017
#define URB_FUNCTION_VENDOR_INTERFACE                0x0018
#define URB_FUNCTION_VENDOR_ENDPOINT                 0x0019
#define URB_FUNCTION_CLASS_DEVICE                    0x001A
#define URB_FUNCTION_CLASS_INTERFACE                 0x001B
#define URB_FUNCTION_CLASS_ENDPOINT                  0x001C
#define URB_FUNCTION_RESERVE_0X001D                  0x001D
// previously URB_FUNCTION_RESET_PIPE
#define URB_FUNCTION_SYNC_RESET_PIPE_AND_CLEAR_STALL 0x001E
#define URB_FUNCTION_CLASS_OTHER                     0x001F
#define URB_FUNCTION_VENDOR_OTHER                    0x0020
#define URB_FUNCTION_GET_STATUS_FROM_OTHER           0x0021
#define URB_FUNCTION_CLEAR_FEATURE_TO_OTHER          0x0022
#define URB_FUNCTION_SET_FEATURE_TO_OTHER            0x0023
#define URB_FUNCTION_GET_DESCRIPTOR_FROM_ENDPOINT    0x0024
#define URB_FUNCTION_SET_DESCRIPTOR_TO_ENDPOINT      0x0025
#define URB_FUNCTION_GET_CONFIGURATION               0x0026
#define URB_FUNCTION_GET_INTERFACE                   0x0027
#define URB_FUNCTION_GET_DESCRIPTOR_FROM_INTERFACE   0x0028
#define URB_FUNCTION_SET_DESCRIPTOR_TO_INTERFACE     0x0029

// Reserve 0x002B-0x002F
#define URB_FUNCTION_RESERVE_0X002B                  0x002B
#define URB_FUNCTION_RESERVE_0X002C                  0x002C
#define URB_FUNCTION_RESERVE_0X002D                  0x002D
#define URB_FUNCTION_RESERVE_0X002E                  0x002E
#define URB_FUNCTION_RESERVE_0X002F                  0x002F

// USB 2.0 calls start at 0x0030

#if (_WIN32_WINNT >= 0x0501)

#define URB_FUNCTION_GET_MS_FEATURE_DESCRIPTOR       0x002A
#define URB_FUNCTION_SYNC_RESET_PIPE                 0x0030
#define URB_FUNCTION_SYNC_CLEAR_STALL                0x0031

#endif

#if (_WIN32_WINNT >= 0x0600)

#define URB_FUNCTION_CONTROL_TRANSFER_EX             0x0032
#define URB_FUNCTION_RESERVE_0X0033                  0x0033
#define URB_FUNCTION_RESERVE_0X0034                  0x0034

#endif

#if (NTDDI_VERSION >= NTDDI_WIN8)

#define URB_FUNCTION_OPEN_STATIC_STREAMS                          0x0035
#define URB_FUNCTION_CLOSE_STATIC_STREAMS                         0x0036
#define URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER_USING_CHAINED_MDL 0x0037
#define URB_FUNCTION_ISOCH_TRANSFER_USING_CHAINED_MDL             0x0038
#endif

系统信息获取

系统信息主要是Windows系统信息的获取。这些信息是通过IRP_MJ_PNP实现的。其对应的MinorFunction主要有：
IRP_MN_QUERY_ID、IRP_MN_QUERY_DEVICE_TEXT。

PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation(Irp)

RP_MN_QUERY_DEVICE_TEXT

RP_MN_QUERY_DEVICE_TEXT解析为：

DEVICE_TEXT_TYPE textype = irpStack->Parameters.QueryDeviceText.DeviceTextType;

值有：

typedef enum {
    DeviceTextDescription = 0,            // DeviceDesc property
    DeviceTextLocationInformation = 1     // DeviceLocation property
} DEVICE_TEXT_TYPE, *PDEVICE_TEXT_TYPE;

IRP_MN_QUERY_ID

当为IRP_MN_QUERY_ID时。

BUS_QUERY_ID_TYPE id = irpStack->Parameters.QueryId.IdType;

类型有：

typedef enum {
    BusQueryDeviceID = 0,       // <Enumerator>\<Enumerator-specific device id>
    BusQueryHardwareIDs = 1,    // Hardware ids
    BusQueryCompatibleIDs = 2,  // compatible device ids
    BusQueryInstanceID = 3,     // persistent id for this instance of the device
    BusQueryDeviceSerialNumber = 4,   // serial number for this device
    BusQueryContainerID = 5     // unique id of the device's physical container
} BUS_QUERY_ID_TYPE, *PBUS_QUERY_ID_TYPE;