DD_UPDATEVPORTDATA structure

The DD_UPDATEVPORTDATA structure contains the information required to start, stop, and change the video port extensions (VPE) object.

Syntax


typedef struct _DD_UPDATEVPORTDATA {
  PDD_DIRECTDRAW_LOCAL lpDD;
  PDD_VIDEOPORT_LOCAL  lpVideoPort;
  PDD_SURFACE_INT      *lplpDDSurface;
  PDD_SURFACE_INT      *lplpDDVBISurface;
  PDD_VIDEOPORTINFO    lpVideoInfo;
  DWORD                dwFlags;
  DWORD                dwNumAutoflip;
  DWORD                dwNumVBIAutoflip;
  HRESULT              ddRVal;
  VOID                 *UpdateVideoPort;
} DD_UPDATEVPORTDATA;

Members

lpDD

Points to a DD_DIRECTDRAW_LOCAL structure that is relevant to the current Microsoft DirectDraw process only.

lpVideoPort

Points to a DD_VIDEOPORT_LOCAL structure that represents this VPE object.

lplpDDSurface

Points to an array of DD_SURFACE_INT structures that represent regular video surfaces. This member can be NULL.

lplpDDVBISurface

Points to an array of DD_SURFACE_INT structures that represent VBI surfaces. This member can be NULL.

lpVideoInfo

Points to a DDVIDEOPORTINFO structure that describes how the VPE object should transfer video data to a surface. This member can be NULL when dwFlags is DDRAWI_VPORTSTOP.

dwFlags

Indicates the action to be performed by the VPE object. This member must be one of the following values:

FlagMeaning

DDRAWI_VPORTSTART

The driver should start the flow of data through the VPE object.

DDRAWI_VPORTSTOP

The driver should stop the flow of data through the VPE object.

DDRAWI_VPORTUPDATE

DdVideoPortUpdate has been called with a new set of flags in the dwVPFlags member of the DDVIDEOPORTINFO structure to which lpVideoInfo points. The driver should change the flow of data through the VPE object according to the new flags.

 

dwNumAutoflip

Specifies the number of surfaces in the list to which lplpDDSurface points. If this member is greater than 1, lplpDDSurface is an array of surface structures to accommodate autoflipping.

dwNumVBIAutoflip

Specifies the number of surfaces in the list to which lplpDDVBISurface points. If this member is greater than 1, lplpDDVBISurface is an array of surface structures to accommodate autoflipping of VBI data.

ddRVal

Specifies the location in which the driver writes the return value of the DdVideoPortUpdate callback. A return code of DD_OK indicates success. For more information, see Return Values for DirectDraw.

UpdateVideoPort

Used by the DirectDraw API and should not be filled in by the driver.

Requirements

Header

Ddrawint.h (include Winddi.h)

See also

DDVIDEOPORTINFO
DdVideoPortUpdate

 

 

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