RISC-V Support

[k-bankowski]

Hi! Have you ever considered dedicated support for RISC-V?

After brief research, I noticed that OpenH264 implements optimizations based on ARM NEON extension (SIMD instruction set). The same improvements might be performed by utilizing ratified RISC-V Vector Extension RVV v1.0.

As Samsung R&D Poland we are considering contribution to the project to increase performance on RISC-V based platforms. Naturally, before we start we would love to hear your opinion on the topic :).