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Have they said anything about latency or asynchronous timewarp? It's a bit too technical to make it into end-user marketing content, but for game developers ATW

Have they said anything about latency or asynchronous timewarp? It's a bit too technical to make it into end-user marketing content, but for game developers ATW is a huge deal and it's an area where Cardboard was lagging way behind.

brianwawok 10y ago
Well they have a certified device sticker... that sticker requires certain latencies. They did not reveal the numbers, but in theory that should be a big step.
- pritambaral 10y ago
  I remember them mentioning in the keynote something about 20ms latency wrt. Daydream
mtgx 10y ago
No, but I think Imagination hinted at that in its new post: http://blog.imgtec.com/powervr/presence-in-virtual-reality-and-how-powervr-gpus-can-help http://blog.imgtec.com/powervr/presence-in-virtual-reality-a...
ZenoArrow 10y ago
The potential to improve Android's audio latency is the main reason I'm interested in this latest development, could end up having positive knock on effects for the Linux audio in general too.
- sirtaj 10y ago
  In this specific case, it's not Linux here that's the problem but Android itself. The kernel has been capable of near-millisecond audio latency for years, even more so with an RT-patched kernel. Google just hasn't cared much about audio latency so far, and their VM probably makes things worse.
  - ZenoArrow 10y ago
    The kernel has been capable of sub 10ms audio latency for years, but the audio subsystems that are commonly used in Linux hold Linux back from achieving that level of performance (on general purpose Linux systems at least, embedded systems are a different matter). ALSA isn't flexible enough, PulseAudio is too slow, JACK is too specialised, etc... CoreAudio on OSX shows what an audio stack can be capable of, all the Linux audio solutions currently available are subpar compared to CoreAudio. AudioFlinger is Android's audio server. I'd be interested to see how far this can be pushed, but perhaps Google will route around it and provide a different solution for the type of low latency audio that immersive VR requires, IIRC using an alternative audio stack was Samsung's approach with GearVR.
    - sirtaj 10y ago
      I agree completely about the user-space tools on Linux. My doubt is that Google will come up with a solution that applies anywhere except Android. But given the hopeless situation there at the moment, I'd be okay even with that.

brianwawok 10y ago

Well they have a certified device sticker... that sticker requires certain latencies. They did not reveal the numbers, but in theory that should be a big step.

pritambaral 10y ago
I remember them mentioning in the keynote something about 20ms latency wrt. Daydream

mtgx 10y ago

No, but I think Imagination hinted at that in its new post: http://blog.imgtec.com/powervr/presence-in-virtual-reality-and-how-powervr-gpus-can-help http://blog.imgtec.com/powervr/presence-in-virtual-reality-a...

ZenoArrow 10y ago

The potential to improve Android's audio latency is the main reason I'm interested in this latest development, could end up having positive knock on effects for the Linux audio in general too.

sirtaj 10y ago
In this specific case, it's not Linux here that's the problem but Android itself. The kernel has been capable of near-millisecond audio latency for years, even more so with an RT-patched kernel. Google just hasn't cared much about audio latency so far, and their VM probably makes things worse.
- ZenoArrow 10y ago
  The kernel has been capable of sub 10ms audio latency for years, but the audio subsystems that are commonly used in Linux hold Linux back from achieving that level of performance (on general purpose Linux systems at least, embedded systems are a different matter). ALSA isn't flexible enough, PulseAudio is too slow, JACK is too specialised, etc... CoreAudio on OSX shows what an audio stack can be capable of, all the Linux audio solutions currently available are subpar compared to CoreAudio. AudioFlinger is Android's audio server. I'd be interested to see how far this can be pushed, but perhaps Google will route around it and provide a different solution for the type of low latency audio that immersive VR requires, IIRC using an alternative audio stack was Samsung's approach with GearVR.
  - sirtaj 10y ago
    I agree completely about the user-space tools on Linux. My doubt is that Google will come up with a solution that applies anywhere except Android. But given the hopeless situation there at the moment, I'd be okay even with that.