Pavel Machek
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Pavel Machek
pavel
@slightlyoff It is somehow important small&light phones keep existing. (And I don't mind "cheap"). Usually I'm either on horseback (where 180gram smartphone breaks easily) or carry notebook (where I already have decent screen I want to use, thank you). I played with Geeksphone Keon, and that one is almost right size and non-evil. I wonder if I should get one of those kaiOS things.
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Pavel Machek
pavel
@AsteroidOS So... There likely is place for Linux smartwatch, but do you really want big-enough watch so that they can run Linux for weeks? Smartwatch is good reason for good & small system that is smaller than Linux (in particular does not need MMU and can run in less than 256KB RAM). See https://www.espruino.com/ , I like that one.
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Pavel Machek
pavel
Trying to do debayering on CPU using vector extension. So far targeting x86-64 and pinephone... and so far it is few times slower than naive approach. Is there good high-level overview of avx and neon somewhere? Any hints? Anyone willing to help?
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Pavel Machek
pavel
@hrw @haeckerfelix I'm afraid there way too little video clips with permissive-enough licensing...
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Pavel Machek
pavel
"Recently" terminals started beeping when mouse enters/exits the window. It seems like running emacs remotely then terminating the connection does that. How is this ... annoying glitch called and how do I get rid of it? Debian 11.8 with mate.
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Pavel Machek
repeated
repeated
c3voc releases
c3voc_releases@chaos.social
Breaking "DRM" in Polish trains has been released on media.ccc.de https://media.ccc.de/v/37c3-12142-breaking_drm_in_polish_trains
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@drewdevault "Perfect mainline Linux support" for a SoC is cool. But even better would be create compatible hardware, so that Linux, Windows, DOS, Xenix, ... can be ran on the hardware without needing any support. PCs in 486 era used to be like that, everything compatible with everything else, and it would be good to get there again with Risc-V. Asking not for compatible instruction sets, asking for compatible platform.
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Pavel Machek
pavel
Trying to do RGBA->RGB conversion with AVX. Yes, it is trivial task. No, I don't get speedup over trivial code.
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Pavel Machek
pavel
@martijnbraam Did you have some solution to uncached memory problem? On pinephone, v4l2 passes uncached memory to userspace, leading to huge performance problems everywhere. The hw seems to have enough power, but we sabotage it be turning off caches :-(.
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Pavel Machek
pavel
@martijnbraam According to my notes, PP should be able to encode 1920x1080 video at 28fps (h264, ultrafast) or 1280x720 video at 100fps. 720p is not great, but should be quite usable.
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Pavel Machek
pavel
@martijnbraam Yeah, well, I'd prefer something that has Linux drivers.
There is video recording on Librem 5 in Millipixels (saving raw frames and processing them offline). There is one on PinePhone (saving jpegs and processing them offline, or doing gstreamer pipeline in low res). I'm playing with GPUs to turn hem into ISP so I could increase performance.
There is video recording on Librem 5 in Millipixels (saving raw frames and processing them offline). There is one on PinePhone (saving jpegs and processing them offline, or doing gstreamer pipeline in low res). I'm playing with GPUs to turn hem into ISP so I could increase performance.
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Pavel Machek
pavel
@martijnbraam So the video recording would be for Librem 5 or similar. The preview won't have goodies such as lens shading correction, correct?
Hardware h264 encoding would be cool. Is it available on any common hw?
Hardware h264 encoding would be cool. Is it available on any common hw?
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Pavel Machek
pavel
Camera ISP: Does denoise come before or after debayer? I see "illogical" order in the paper, and I believe that logical order should also be easier to implement...
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Pavel Machek
pavel
@martijnbraam I see you are doing a lot of work on dng processing. I'm trying to do raw processing on GPU to enable video recording. Do you have any good pointers on dng processing? Did you do or do you plan to play with video recording?
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Pavel Machek
pavel
@Blort @vacuumbeef @as400 PinePhone: GPS is poor, agreed. Hw problem, I assumed. Call quality is good enough. Battery lasted like hour and half of continuous browsing. Photos were okay; not great but I don't recall "wildly green" issue. No way to record video, if I can add one. On screen keyboard is not great.
Oh, one issue for me is that display is too dim on direct sunlight.
But I could live with all that if it actually fit in my pockets :-).
Oh, one issue for me is that display is too dim on direct sunlight.
But I could live with all that if it actually fit in my pockets :-).
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Pavel Machek
pavel
@as400 @Blort @vacuumbeef Umm. On PinePhone, all these little things really should work. (Not waking for alarm clock is other thing, a bit tricky :-), but also solved). PinePhone is too big to carry on a horse, basically; so that's fail for me. Plus it is a little slow and battery life is a little bad, but those are details compared to the "too big" problem. Basics work for me on Mobian.
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