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Note

This document describes how drivers can implement a custom Miracast stack in Windows 8.1. As of Windows 10, the OS ships with a built-in Miracast stack that can work on any GPU and it is no longer recommended that drivers implement a custom Miracast stack. This documentation is therefore deprecated and Microsoft may remove support for custom Miracast stacks in a future version of Windows.

Wireless (Miracast) displays can optionally be supported by Windows Display Driver Model (WDDM) 1.3 and later drivers. This capability is new starting with Windows 8.1.

For more information on the requirements of drivers and hardware to support Miracast displays, refer to the Building best-in-class Wireless Projection solutions with Windows 10 guide and the relevant WHCK documentation at Device.Graphics.WDDM13.DisplayRender.WirelessDisplay.

This document describes how drivers can implement a custom Miracast stack in Windows 8.1. As of Windows 10, the OS ships with a built-in Miracast stack that can work on any GPU and it is no longer recommended that drivers implement a custom Miracast stack.

Miracast design guide

These design guide sections describe how display miniport drivers and Miracast user-mode drivers support Miracast displays:

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Miracast reference

These reference sections describe how to implement this capability in your drivers:

User-mode device driver interfaces (DDIs)

Wireless display callback functions called by Miracast user-mode drivers

The reference pages in this section describe wireless display (Miracast) user-mode functions that the operating system implements. Only Miracast user-mode drivers can call these functions.

Pointers to the Miracast display callback functions are returned in a MIRACAST_CALLBACKS structure.

Wireless display functions implemented by Miracast user-mode drivers

The reference pages in this section describe wireless display (Miracast) functions that a Miracast user-mode driver must implement. This type of driver runs in a standalone DLL.

In response to an operating system call to the QueryMiracastDriverInterface function, the Miracast user-mode driver must supply pointers to these functions in the MIRACAST_DRIVER_INTERFACE structure, except for pfnDataRateNotify, which is has a pointer declared in RegisterForDataRateNotifications. Sweex input devices driver download.

Wireless display (Miracast) structures and enumerations

All user-mode structures and enumerations that are used with Miracast display device driver interfaces (DDIs).

These additional user-mode structures and enumerations support Miracast displays and are new or updated for Windows 8.1:

• DISPLAYCONFIG_TARGET_BASE_TYPE (new)
• DISPLAYCONFIG_VIDEO_SIGNAL_INFO (AdditionalSignalInfo child structure added)
• DISPLAYCONFIG_DEVICE_INFO_TYPE (DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_BASE_TYPE constant added)
• D3DKMDT_VIDEO_SIGNAL_INFO (AdditionalSignalInfo child structure added)
• DISPLAYCONFIG_DEVICE_INFO_TYPE (DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_BASE_TYPE constant added)

Kernel-mode DDIs

Wireless display (Miracast) display callback interface

The Miracast display callback interface contains functions that are implemented by the Microsoft DirectX graphics kernel subsystem to support wireless (Miracast) displays. This interface is supported starting in Windows 8.1.

This section contains reference pages for these kernel-mode functions, which are called by Windows Display Driver Model (WDDM) 1.3 and later display miniport drivers:

The display miniport driver must fill in pointers to these functions in the DXGK_MIRACAST_DISPLAY_CALLBACKS structure.

Wireless display (Miracast) interface

This section contains kernel-mode functions that are implemented by display miniport drivers that support wireless (Miracast) displays. This interface is supported starting in Windows 8.1.

Pointers to the Miracast interface functions are returned in a DXGK_MIRACAST_INTERFACE structure.

These additional kernel-mode structures and enumerations support Miracast displays and are new or updated for Windows 8.1:

• D3DKMDT_VIDEO_OUTPUT_TECHNOLOGY (D3DKMDT_VOT_MIRACAST constant added)
• D3DKMDT_VIDEO_SIGNAL_INFO (AdditionalSignalInfo child structure added)
• DXGK_CHILD_STATUS (Miracast child structure added)
• DXGK_CHILD_STATUS_TYPE (StatusMiracast constant added)
• DXGKARGCB_NOTIFY_INTERRUPT_DATA (MiracastEncodeChunkCompleted child structure added)

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