Quote:
Originally Posted by soresu
If you look at the system requirements section of the PDF it doesn't actually mention either XSS or XSX.
"Hardware: Xbox One, Xbox One S, or Xbox One X"
The googlesource repo is also labelled " GPU-accelerated AV1 decoder for the Xbox One".
So if someone can integrate this into Kodi or Plex for UWP, and Jaguar is enough to cover entropy decoding there are actually millions of devices in living rooms already.
|
Entropy decoding isn't
that complex, and well suited to fast single cores, and IIRC AV1's mandatory slices for high resolutions allow for parallelized entropy decode. This is a huge improvement from VP8-9, which were very hard to parallelize in decode.
Quote:
|
I wouldn't expect MS to be any help on that score for obvious profit based reasons of pushing people to XSS and XSX.
|
I'm very confident that Microsoft is not worried about lack of demand for the new consoles! And they are putting a big emphasis on a uniform ecosystem. If they see material value in AV1, I'd expect them try to backport it. The real question is if they see value in AV1 over HEVC, which is supported in HW since Xbox One S.
Quote:
|
Hopefully if it does get ported to the new console gen they use as much dav1d AVX2 asm as possible for the entropy decoding stage, I've no idea how much SSSE3 asm is in the current implementation to use on the Jaguar cores.
|
Jaguar doesn't have AVX2, alas.
https://en.wikipedia.org/wiki/Jaguar...architecture):
SSE4.1, SSE4.2, AES, CLMUL, MOVBE, AVX, F16C, BMI1
So, that would be friction for backporting dav1d to PS4 or Xbox One. SSSE3 may be sufficient for 4Kp60, though, which is all the previous generation supports anyway. I'm sure an AVX implementation would still be better than SSSE3, and probably less incremental work to develop once there are already SSSE3 and AVX2 implementations to upgrade/downgrade from.
Xbox Series and PS5 have AVX2.