Friday, 2015-10-30

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mithroBertl_zZ: ping me when you are around01:41
mithrothaytan: You seem to have been in LWN a lot lately :P02:50
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thaytanmithro, it helps to hang out with one of their writers :)02:53
mithrothaytan: Nathan?02:54
thaytanyeah, he came to the GStreamer conf02:57
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mithrothaytan: I didn't have much luck getting any of the Opsis stuff into LWN03:20
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mithroshenki: you still around at all, or have you started your holiday already?03:32
shenkimithro: still around, but really busy03:49
mithroshenki: is there a kind of "contributing to the linux kernel style guide" type thing somewhere that includes things like what the header comments in files should look like?03:50
shenkimithro: err,
shenkimithro: there's Contributing in Documentation/CodingStyle03:51
shenkithat sentence was malformed03:51
mithroshenki: ha is a real domain too :)03:51
shenkidoes it check patches?03:51
mithroshenki: These files won't actually go in the Linux kernel, I just wanted to copy their style because it includes a bunch of Linux headers in it03:52
CarlFKmithro: Drew has been doing some kernel hacking03:52
CarlFKlet me see if I can find him03:52
mithroshenki: okay, I'll take a look at Documentation/CodingStyle too03:56
mithroshenki: my other question was, is there a "compile time assert" that exists in the Linux kernel code?04:00
thaytanpanic() :)04:00
mithrothaytan: that is a runtime assert?04:01
shenkimithro: yes04:02
shenkimithro: ccan has one04:02
thaytanmithro, yes, it is04:02
mithrothaytan: I basically want to confirm a couple of things like a structure is ending up at the right size04:02
mithroshenki: I know a bunch of ways to do a compile time assert in C, but was wondering if there is a standard one that the Linux kernel uses?04:02
tpbTitle: ccan (at
shenkimithro: ccan is a good place for this stuff, as rusty has reimplemented lots of common kernel things for use in userspace04:03
shenkimithro: the kenrel has BUILD_BUG_ON that you could take a look at04:03
shenkimithro: include/linux/bug.h04:03
mithroshenki: Thanks! that is what I'm looking for :)04:04
shenkii'd use the ccan stuff though, that's what it's there for04:04
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* mithro slowly figures out the contents of the HDMI2USB USB descriptors07:44
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xfxfmithro: was there any news on how to get 30fps using gstreamer?08:42
xfxfi assume there's a magic line needed somewhere - could only get 15fps yesterday08:42
xfxfframerate=25/0 or 30/0 no worky08:43
_florent_xfxf: can you try to comment this:08:48
tpbTitle: HDMI2USB-misoc-firmware/encoder.c at master · timvideos/HDMI2USB-misoc-firmware · GitHub (at
_florent_it's possible that identifier_frequency_read()/30 is not correct08:49
_florent_and give 15 fps instead of 3008:49
_florent_with this line, you'll be running the encoder at the maximum speed08:49
xfxf_florent_: ah, neat - yeah can do when i'm home in a hour or so08:49
_florent_just need to recompile the firmware not the gateware08:49
mithroxfxf: what is the encoder saying?09:03
mithroxfxf: I've also been looking at the HDMI2USB USB descriptors and there are some around frame rate09:04
mithroGstreamer might be more respective of what we advertise compared to mplayer09:05
mithroMore magic numbers figured out!11:25
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GChrissv4l2-ctl -d /dev/video1  --list-formats-ext15:47
GChriss^= might help15:47
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