In addition to mapping the Direct3D graphics API to Vulkan, Wine developers are also working on mapping the Direct3D video acceleration API to the Vulkan video API. CodeWeavers developer Elizabeth Figura has opened a merge request for Wine to start landing Vulkan video H.264 decoding in the WineD3D code.
This will allow Windows applications using the D3D11 video decoding API to finally use VulkanVideo supported on Linux systems.
This open merge request is just the first of three parts planned around WineD3DH.264 decoding using the VulkanVideoAPI. Currently, it only works with H.264, but can also be extended to work with other video formats supported by VulkanVideo and Direct3D.
This is an exciting development for WineD3D and hopefully the features will be connected soon to allow the use of VulkanVideo in Wine/SteamPlay (Proton) via the Direct3D video interface.