DD_DXAPI_GET_POLARITY control code

A video capture driver passes DD_DXAPI_GET_POLARITY in the dwFunctionNum parameter of the DxApi function to return the polarity of the current hardware video port field.

Input Parameters

• lpvInBuffer
  Pointer to a DDGETPOLARITYIN structure that contains the handle information.

Output Parameters

• lpvOutBuffer
  Pointer to a DDGETPOLARITYOUT structure that contains the polarity information.

Remarks

The bPolarity member of DDGETPOLARITYOUT is set to TRUE if the current field is the even field of an interlaced video signal.

This function identifier can be called at raised IRQL.

Requirements

Header file: Ddkmapi.h (include Ddkmapi.h)

See also

DDGETPOLARITYIN

DDGETPOLARITYOUT