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DD_DXAPI_ADDVPCAPTUREBUFFER control code

  • Article

A video capture driver passes DD_DXAPI_ADDVPCAPTUREBUFFER in the dwFunctionNum parameter of the DxApi function to add a new capture buffer to the internal video port capture queue.

Input Parameters

  • lpvInBuffer
    Pointer to a DDADDVPCAPTUREBUFF structure that contains the information required to add a new buffer.

Output Parameters

  • lpvOutBuffer
    Pointer to a DWORD that contains the DirectDraw return value.

Remarks

Each time a hardware video port V-sync occurs, the kernel-mode video transport determines whether the previous field needs to be captured and if so, initiates a bus master to the next buffer in the queue.

This function identifier can be called at raised IRQL.

Requirements

Header

 Ddkmapi.h (include Ddkmapi.h)

See also

DDADDVPCAPTUREBUFF