OpenCL™ and OpenGL® Compatibility Pack) and having this layering makes it easier to port existing media applications such as FFmpeg or GStreamer, which can have their existing VA-API backends target libva-win32 and work across platforms and hardware vendors. This work continues our pattern of supporting a wide range of other APIs by layering them on top of the Direct3D 12 driver model (ie. Having VA-API on Windows enables developers to build video apps that work across platforms.
This API is primarily used in Linux-based environments today and several well-known media applications utilize it to access GPU acceleration for diverse video operations. The libva library -an Intel implementation for VA-API- is used along with a VA-API driver, to which the video operations are delegated into from the libva library, and then implemented in the driver targeting the specific hardware platform the app is running on. Apps can use it to access video hardware acceleration capabilities via its interface specification for workloads such as decode, encode, processing, etc. It consists of a main library and driver-specific acceleration backends for each supported hardware vendor. Originally developed by Intel, VAAPI (Video Acceleration API) is an open-source library and API specification, which provides access to graphics hardware acceleration capabilities for video processing.
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