Magic Kernel Sharp (Classic, 2013, and 2021) resampling filter for upscaling filter

Expected behavior of the wanted feature

Magic Kernel Sharp is a resampling algorithm by John Costella. There are Classic, 2013 and 2021 versions so add all three. The website is https://johncostella.com/magic/ and it describes its use. I'm wanting it implemented as I like resampling filters (ones with math) and MPV and MPV Android have never had this one before. Read the website for a more detailed explanation.

https://github.com/Viddeleer/Image-Processing has a C++ implementation of the upscaling filter (resampling methods) and Magic Kernel Sharp would be useful for both the Android and Windows versions of MPV. Currently Magic Kernel Sharp is in no MPV version, even on Android. ImageMagick has added Magic Kernel Sharp due to being a resampling algorithm, and I got the developer of https://github.com/T8RIN/ImageToolbox to add Magic Kernel Sharp too.

Alternative behavior of the wanted feature

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Log File

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Sample Files

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Read the Magic Kernel Sharp description at johncostella.com/magic/ and compare the C++ implementation in Viddeleer/Image-Processing. Then locate mpv’s existing upscaling resampling-filter integration point and determine how the Classic, 2013, and 2021 variants fit there. Done means all three filters are available for mpv’s upscaling path and their behavior is covered by appropriate validation.