WPD_COMMAND_MTP_EXT_EXECUTE_COMMAND_WITH_DATA_TO_READ Command
The WPD_COMMAND_MTP_EXT_EXECUTE_COMMAND_WITH_DATA_TO_READ command sends an MTP command block, which will be followed by a data phase. (The data is sent from the device to the host.)
Command category
WPD_CATEGORY_MTP_EXT_VENDOR_OPERATIONS
Parameters
The driver expects the following parameters.
| Parameter | VarType | Description |
|---|---|---|
| WPD_PROPERTY_MTP_EXT_OPERATION_CODE | VT_UI4 | Required. Identifies a vendor-extended MTP operation code. |
| WPD_PROPERTY_MTP_EXT_OPERATION_PARAMS | VT_UI4 | Required. An IPortableDevicePropVariantCollection,which identifies the required parameters for the vendor operation code. |
Return Value
The driver returns the following results.
| Result | VarType | Description |
|---|---|---|
| WPD_PROPERTY_MTP_EXT_TRANSFER_TOTAL_DATA_SIZE | VT_UI8 | Required. Returns the total data size, in bytes, excluding any overhead coming from the device. If the device reports unknown datasize (0xFFFFFFFF), the driver should call ReadData repeatedly until a short chunk is received |
| WPD_PROPERTY_MTP_EXT_OPTIMAL_TRANSFER_BUFFER_SIZE | VT_UI4 | Optional. Returns the optimal size of the transfer buffer. |
| WPD_PROPERTY_MTP_EXT_TRANSFER_CONTEXT | VT_LPWSTR | Required. Specifies the context identifier for subsequent data transfers. |
Calling Methods
Can only be called directly by using IPortableDevice::SendCommand.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
See also
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