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)