import "unknwn.idl";

//
// PTP command request
//
const DWORD VENDOR_COMMAND_NUMPARAMS_MAX = 5;
typedef struct _VENDOR_COMMAND
{
   WORD    OpCode;         // the opcode
   DWORD   SessionId;      // the session id
   DWORD   TransactionId;  // the transaction id
   DWORD   Params[VENDOR_COMMAND_NUMPARAMS_MAX];  // parameters
}VENDOR_COMMAND, *PVENDOR_COMMAND;

//
// PTP response block
//
const DWORD VENDOR_RESPONSE_NUMPARAMS_MAX = 5;
typedef struct _VENDOR_RESPONSE
{
    WORD    ResponseCode;       // response code
    DWORD   SessionId;          // the session id
    DWORD   TransactionId;      // the transaction id
    DWORD   Params[VENDOR_RESPONSE_NUMPARAMS_MAX];  // parameters
}VENDOR_RESPONSE, *PVENDOR_RESPONSE;

//
// NextPhase constants
//
const int VENDORCOMMAND_READ_DATA = 3;
const int VENDORCOMMAND_WRITE_DATA = 4;
const int VENDORCOMMAND_NO_DATA = 5;

//
// IWiaPtpVendorExt definition
//
[  object,
   uuid(D5F0C4B7-7981-4d92-BC1A-D3686BDF2045),
   helpstring("PTP vendor access"),
]

interface IWiaPtpVendorExt : IUnknown
{
   [local]
      HRESULT VendorCommand(
         [in]                           VENDOR_COMMAND *pCommand,
         [out]                          VENDOR_RESPONSE *pResponse,
         [in, out]                      unsigned int *pReadDataSize,
         [out, size_is(*pReadDataSize)] unsigned char *pReadData,
         [in]                           unsigned int WriteDataSize,
         [in, size_is(WriteDataSize)]   unsigned char *pWriteData,
         [in]                           unsigned int NumCommandParams,
         [in]                           int NextPhase
         );
};