| T42 | <nightishaman> mal: test_hwcomposer segfaults | 00:33 |
|---|---|---|
| Mister_Magister | @nightishaman you're experiencing porting back in circa 2015 | 00:36 |
| Mister_Magister | took me half a year to get to gui | 00:36 |
| T42 | <nightishaman> how much coding experience do you have | 00:37 |
| Mister_Magister | I'm pro | 00:37 |
| T42 | <nightishaman> yeah how long and what | 00:38 |
| Mister_Magister | I've been backend web developer since like highschool but started porting way before i started working but like 8 years of professional backend php developer | 00:39 |
| Mister_Magister | and porting since over a decade | 00:39 |
| Mister_Magister | and i'm still dumb as shit | 00:40 |
| T42 | <nightishaman> thats a lot | 00:41 |
| Mister_Magister | well time does that weird thing that it marches on | 00:42 |
| T42 | <nightishaman> ive been hobby developer since 2010/11, doing my bachelor thesis in computer science security and my bachelor thesis probably will include working on my own kernel | 00:43 |
| Mister_Magister | doing c++, is hobby developer for me | 00:45 |
| Mister_Magister | mal just gets angry at me because i've been bothering him for close to a decade and he had enough of me and doesn't believe how dumb I am :P | 00:46 |
| Mister_Magister | oh also mal about qmlglsink, I've tried this https://github.com/dv1/qmlglsink-example and it exhibits same issue as my app, https://paste.opensuse.org/pastes/03b27af63736 problem with wayland :/ | 00:53 |
| Mister_Magister | shatgpt says something about wayland version but since we built it on sfos sources that shouldn't be a problem | 00:56 |
| Mister_Magister | let's see if cheeky 4 -> 3 in the code will solve this | 01:06 |
| Mister_Magister | would be cool if it did | 01:06 |
| Mister_Magister | wl_registry@27: error 0: invalid version for global wl_seat (9): have 3, wanted 4 | 01:24 |
| Mister_Magister | i've changed the version but it still yells that | 01:24 |
| Mister_Magister | hmmmmmmmmmmm | 01:24 |
| Mister_Magister | oh that seems like it's in the gst-plugins-base because the path is ./subprojects/gst-plugins-base/gst-libs/gst/gl/wayland/gstglwindow_wayland_egl.c | 01:29 |
| Mister_Magister | one cheeky gst-plugins-base build in order | 01:31 |
| T42 | <nightishaman> can i somehow install the debug symbols for test_hwcomposer | 01:33 |
| Mister_Magister | which package provides test_hwcomposer? | 01:35 |
| Mister_Magister | @nightishaman libhybris-debuginfo | 01:36 |
| Mister_Magister | and debugsource i guess | 01:36 |
| T42 | <nightishaman> zypper in doesnt find them | 01:45 |
| Mister_Magister | you sure? it sure as hell does find them on my device | 01:47 |
| Mister_Magister | but you're not building on obs are you? | 01:47 |
| T42 | <nightishaman> nope | 01:47 |
| Mister_Magister | try finding them in droid-local->epo | 01:47 |
| Mister_Magister | repo* | 01:47 |
| Mister_Magister | AY gst-plugins-base rebuild move worked! | 01:49 |
| T42 | <nightishaman> https://paste.ubuntu.com/p/S2WPBcQfFK/ | 01:49 |
| Mister_Magister | i think you need droid-hal-device-devel | 01:51 |
| Mister_Magister | hmm now both test app and my app just segfault when playing video | 01:58 |
| Mister_Magister | Thread 28 "droidvdec0:src" received signal SIGSEGV, Segmentation fault. lovely | 01:58 |
| Mister_Magister | only notable thing is that it cannot find libI420colorconvert.so | 02:02 |
| Mister_Magister | so anyway I disabled hw decoding and it segfaults anyway | 02:06 |
| Mister_Magister | wait | 02:07 |
| Mister_Magister | it's playing now | 02:07 |
| Mister_Magister | but I only hear audio see nothing | 02:07 |
| Mister_Magister | IT WORKS | 02:08 |
| Mister_Magister | in test app not my app but that's 99% QML fail | 02:08 |
| Mister_Magister | i have suspecion that libI420colorconvert.so is the culprit | 02:09 |
| Mister_Magister | ayy got it to show in picoplayer, i knew its just qml things | 02:12 |
| Mister_Magister | IT WOOOOOOOOOOOOOOOOOOORKS | 02:18 |
| Mister_Magister | SUBTITLES OVERLAY! | 02:18 |
| Mister_Magister | that's why i wante dit! | 02:18 |
| Mister_Magister | now every type of subtitles that gst supports will work and will just overlay themselves! | 02:18 |
| Mister_Magister | huuuuuh | 02:42 |
| Mister_Magister | so i built gst-droid on obs against my deveice in order to get debuginfo and… it just… works now | 02:43 |
| Mister_Magister | my app segfaults but test app doesn't | 02:43 |
| T42 | <nightishaman> still getting no backtrace in gdb for test_hwcomposer | 02:44 |
| Mister_Magister | ok picoplayer doesn't segfault under gdb which is even more fun | 02:48 |
| Mister_Magister | no still, if i install gst-droid from adaptation-common it breaks | 02:58 |
| Mister_Magister | hmm | 03:02 |
| Mister_Magister | it randomly stopped working on either version of gstdroid | 03:03 |
| Mister_Magister | it apparently segfaults here https://github.com/sailfishos/gst-droid/blob/0.20240806.0/gst/droidcodec/gstdroidvdec.c#L126C7-L126C11 | 03:04 |
| Mister_Magister | doesn't seem like it should segfault at all | 03:07 |
| Mister_Magister | now it broke completely it just hangs | 03:10 |
| Mister_Magister | it just hangs also on my other device hm | 03:16 |
| Mister_Magister | maybe it had cached hw decoding disabled or smth, but it's werid, originally it would straigth segfault on both now it just… hangs… | 03:19 |
| Mister_Magister | and when i launch different media it segfaults again | 03:22 |
| Mister_Magister | so it either segfaults or hangs | 03:22 |
| Mister_Magister | yeah it segfaults on out0[x] = row[0]; | 03:22 |
| Mister_Magister | p out0[312] returns 2 = 0 '\000' (x is 312) | 03:23 |
| Mister_Magister | on the other hand row[0] is Cannot access memory at address 0x7f7e504000 | 03:24 |
| Mister_Magister | i feel like this is way beyond my comprehension | 03:29 |
| Mister_Magister | but i feel like mal will be able to help now | 03:31 |
| Mister_Magister | hmm some format plays just fine, other format, segfaults, some other format, hangs | 03:31 |
| Mister_Magister | when playing twitch stream which is like bone standard h264 stuff, it plays one frame and then dies | 03:40 |
| Mister_Magister | sometimes 0 frames | 03:41 |
| Mister_Magister | i feel like qmlglsink is unearthing demons in gstdroid that it itself did now know it had | 03:41 |
| Mister_Magister | and i think now that we got qmlglsink those demons have to be exorcised | 03:42 |
| Mister_Magister | but we're close | 03:42 |
| Mister_Magister | and yes it works without qmlglsink if you were pondering | 03:43 |
| Mister_Magister | also it's normal that behaviour differs with qmlglsink because it does one thing that i wanted that no other software in sfos currently (i don't think so) does, converts droidmedia specific output to standard output | 03:46 |
| Mister_Magister | so let me explain, currently gst-droid outputs in custom droidmedia format, that, my apps just make sink specific for that format, and also if i remember correctly, sfos has plugin for qtmultimedia that does the same, so if I'm not mistaken no other software ever in sfos's history used this codepath to convert droidmedia custom output format to standard format and thats why it has issues | 03:51 |
| Mister_Magister | but if we squash the issues, sfos qill go into whole new era of video playback | 03:51 |
| Mister_Magister | now i just need mal to 1. wake up, 2. be willing to help 3. report my findings to him cause aint no soul reading this backlog | 03:52 |
| Mister_Magister | anyone reading this rambling should be over the moon excited | 03:54 |
| Mister_Magister | in simplest terms, it's 2026 and NO sailfish app can play video with subtitles. None of them. Only my app can play srt subtitles but those are most basic ones. With these changes my app will be able to play every subtitle that gstreamer supports period. | 03:56 |
| Mister_Magister | and what's most strange seemingly only I am trying to get us subtitles xd | 04:05 |
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