[MacPorts] #62942: Update x265 Portfiles and x265 port to compile in the NEON patch for Apple Silicon

[MacPorts]

#62942: Update x265 Portfiles and x265 port to compile in the NEON patch for Apple
Silicon
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  Reporter:  janngobble  |      Owner:  (none)
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  ffmpeg x265 neon arm64 apple
      Port:  x265        |  silicon
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Changes (by janngobble):

 * type:  enhancement => update


Old description:

> x265 compiles for Apple Silicon but there is a x265 patch for enabling
> the fast NEON intrinsics.
>
> At the following URL, it says: "The FFmpeg file for Apple Silicon
> includes the x265 NEON patch. This makes the encoding speed of x265 much
> faster. "
>
> https://ffmpegfromzerotohero.com/blog/
>
> Can we enable this on the FFMPEG/X265 port MacPorts uses?

New description:

 x265 compiles for Apple Silicon but there is a x265 patch for enabling the
 fast NEON intrinsics.

 At the following URL, it says: "The FFmpeg file for Apple Silicon includes
 the x265 NEON patch. This makes the encoding speed of x265 much faster. "

 https://ffmpegfromzerotohero.com/blog/

 Can we enable this on the FFMPEG/X265 port MacPorts uses?

 ps: x265's Neon ASM is all in gas format so might work if compiled with
 gcc, doesn't work with clang, nasm doesn't get used for the arm ASM and
 doesn't work if you force it to use nasm.

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Ticket URL: <https://trac.macports.org/ticket/62942#comment:1>
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