This video codec is used by games such as Richman 4, and Zwei: The Arges Adventure.
The decoder logic is based on code from the FFmpeg project.
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v2: loader/wine.inf: Enable ir50_32 video codec.
ir50_32: Implement decompression to 15-bit RGB.
https://gitlab.winehq.org/wine/wine/-/merge_requests/1301