Add support for the "AVS2/3" codec, please!

[ghost]

AVS2/AVS3 (IEEE 1857, GPL v2) are faster than H265 and AV1, and the patent licensing fees are very simple and affordable.

FFmpeg added d/xavs2 and avs3d in 2020, since it's easy enough and it does not seem like a license issue.

[ghost]

https://gitee.com/zhengtianbo/cavs-avs2-avs3_decoder_added_to_mpc_hc/releases https://gitee.com/zhengtianbo/LAVFilters-GB-CAVS-AVS2-AVS3-decoder https://gitee.com/zhengtianbo/FFmpeg-avs2-avs3/releases

avs2: https://github.com/xatabhk/davs2-10bit https://github.com/pkuvcl/xavs2

avs3: https://github.com/uavs3/uavs3d https://github.com/uavs3/uavs3e

[v0lt]

You're probably trolling.

[v0lt]

https://github.com/Aleksoid1978/MPC-BE/blob/master/docs/Changelog.txt

1.6.5.3 - 2022-11-14
=============================
Fixed crash when playing AVS3 video on CPU without AVX instructions.

1.6.5 - 2022-11-11
=============================
MpegSplitter
Added support for AVS3 video codec.

MatroskaSplitter
Added support for AVS3 video codec.

MPCVideoDec
Added support for AVS3 video decoding.

[ghost]

Thanks to @v0lt, very much!

[v0lt]

PS: As far as I remember, there was a problem with AVS2. It was not possible to compile the library as part of FFmpeg. And since AVS2 is very rare, we decided not to add it at all.