Edit

Share via

D3DKMDT_VIDEO_SIGNAL_INFO structure (d3dkmdt.h)

  • Article

The D3DKMDT_VIDEO_SIGNAL_INFO structure contains information about a video signal driven by a video output on a display adapter.

Syntax

typedef struct _D3DKMDT_VIDEO_SIGNAL_INFO {
  D3DKMDT_VIDEO_SIGNAL_STANDARD VideoStandard;
  D3DKMDT_2DREGION              TotalSize;
  D3DKMDT_2DREGION              ActiveSize;
  D3DDDI_RATIONAL               VSyncFreq;
  D3DDDI_RATIONAL               HSyncFreq;
  SIZE_T                        PixelRate;
  union {
    struct {
      D3DDDI_VIDEO_SIGNAL_SCANLINE_ORDERING ScanLineOrdering : 3;
      UINT                                  VSyncFreqDivider : 6;
      UINT                                  Reserved : 23;
    } AdditionalSignalInfo;
    D3DDDI_VIDEO_SIGNAL_SCANLINE_ORDERING ScanLineOrdering;
  };
} D3DKMDT_VIDEO_SIGNAL_INFO;

Members

VideoStandard

A constant from the D3DKMDT_VIDEO_SIGNAL_STANDARD enumeration that indicates the video standard (if any) that defines the video signal.

TotalSize

A D3DKMDT_2DREGION structure that specifies the width and height (in pixels) of the entire video signal.

ActiveSize

A D3DKMDT_2DREGION structure that specifies the width and height (in pixels) of the active portion of the video signal.

VSyncFreq

A D3DDDI_RATIONAL structure that specifies the vertical refresh rate in Hz.

HSyncFreq

A D3DDDI_RATIONAL structure that specifies the horizontal refresh rate in Hz.

PixelRate

The pixel clock rate.

AdditionalSignalInfo

Supported by WDDM 1.3 and later display miniport drivers running on Windows 8.1 and later.

AdditionalSignalInfo.ScanLineOrdering

A constant from the D3DDDI_VIDEO_SIGNAL_SCANLINE_ORDERING enumeration that indicates the scanline ordering (for example, progressive or interlaced) of the video signal.

Supported starting with Windows 8.1.

AdditionalSignalInfo.VSyncFreqDivider

The ratio of the VSync rate of a monitor that displays through a Miracast connected session to the VSync rate of the Miracast sink.

To avoid visual artifacts, the VSync rate of the display monitor that's connected to the Miracast sink must be an integer multiple of the VSync rate of the Miracast sink. The display miniport driver reports the latter rate to the operating system as the refresh rate of the desktop present path.

Note  The operating system fails any attempt by the driver to add a target mode that results in a Miracast target having a VSync rate below 23.9 Hz.
 
For a non-Miracast target, the driver should set VSyncFreqDivider to zero.

Supported starting with Windows 8.1.

AdditionalSignalInfo.Reserved

Reserved for system use. Do not use in your driver.

Supported starting with Windows 8.1.

ScanLineOrdering

A constant from the D3DDDI_VIDEO_SIGNAL_SCANLINE_ORDERING enumeration that indicates the scanline ordering (for example, progressive or interlaced) of the video signal.

Requirements

Requirement Value
Minimum supported client Windows Vista
Header d3dkmdt.h

See also

D3DKMDT_VIDEO_PRESENT_TARGET

D3DKMDT_VIDPN_TARGET_MODE