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#rockbox log for 2012-10-03

00:01:48 Join mc2739 [0] (~mc2739@rockbox/developer/mc2739)
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00:16:57 Join amayer [0] (~alex@h62.26.25.72.ip.windstream.net)
00:17:20amayer[Saint]: ping
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08:30:02*[Saint] wonders how hard it'd be to do file view settings on a per-folder basis in the file explorer.
08:33:28[Saint]all files in /bar, music only in /foo, supported files in /baz, etc.
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08:33:50[Saint]that'd be kinda cool.
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13:22:25pamaurywodz (logs): I'm updated the atjboottool on my repo, it now successfully extracts the FWIMAGE.BIN file. All the drivers in it use the ELF format and I suspect the WELCOME.BIN file is the main binary but I don't have a mips toolchain to check that. Do you think I should integrate this tool to the rockbox repo ?
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14:11:07wodzpamaury: We have a tool for rknano so I don't see why not to commit ATJ tools to our repo
14:11:26pamauryok, I'll do that then
14:11:50wodzall in all this is impressive reverse engineer work done by rb dev :-)
14:12:00pamaury:)
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14:12:47pamauryif you want me to write the correspoding scrambling tool, please tell me, I don't know if you really plan to develop for this platform
14:14:14wodzI plan to develop for this platform, but I don't need scrambling now. Studying OF will take some time considering I'll have to learn MIPS asm
14:14:37wodzAnd first I would like to finish elf loader stuff
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14:14:54pamaurysure
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14:30:22pamaurywodz: done
14:30:38pamauryfeel free to edit/fix/improve it
14:31:18pamauryif I have the time, I'll try to rewrite it in C++ with a big number class and some more structures to better understand what it really does
14:32:59pamauryI don't know if it's really atj2137 specific or atj213x as the tool says
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14:37:18wodzIt is easy to find out. Iriver E100 is based on ATJ2135n and firmware update image is available. But I guess this will work for 213x family
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15:39:22amayer_why is lang/ under apps/ ?
15:39:24amayer_i was looking for lang and apps/ seems like a confusing place to find it
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15:48:25gevaertsamayer_: apps/ stands for "the application layer", which basically means everything that implements user functionality, i.e. not drivers
15:48:51amayer_oh ok. that makes a little more sense
15:49:41amayer_i was thinking apps like functionality wise
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16:30:10the-kyleI'm currently playing a 64kb/s opus file in realtime on the clipv1. It sounds great! Something in the last 2 or 3 commits did it. Before that it wouldn't play at all and froze on the WPS. Only problem now is that stopping playback freezes the player. If I pause first, it reboots. If it's playing when I stop, it hard freezes.
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17:04:07the-kyle128k is also playing in realtime on the clip v1. But now I get a reboot instead of a hard freeze when I stop the track, whether it's playing or not. Trach switch works perfectly however. It's almost usable on this device.
17:04:39saratogatheres almost certainly not enough memory on the clipv1, so you're probably overwriting things in memory as you play
17:06:17the-kyleSounds logical, but then it shouldn't play at all I would think. I should be having the same problems I had 2 days ago, e.g. a hard freeze without playing anything.
17:06:19funmanderf: said it should be ok
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17:08:29saratogai don't see why it shouldn't play
17:08:45saratogafunman: is there someway i can see what i'm about to push to rockbox git before I do it?
17:09:51*the-kyle got it to play 3 tracks in a row, at 64k and 128k. They play gaplessly, and I can skip to previous and next tracks. Pause/resume also work perfectly, and I am able to return to the main menu while playing, although it is just a bit sluggish, and voice clips tend to chop. Only stop seems to crash and reboot now.
17:09:59saratogaugh i cannot use git at all
17:10:52funmansaratoga: git push −−dry-run
17:11:28the-kyleAh, it's hard freezing at the file browser.
17:11:37the-kylewhile a track is playing.
17:13:03saratogado i need to setup the gerrit thing on each computer i want to push from?
17:13:55the-kyleOh weird. I can switch to recording while an opus file plays without freezing the device.
17:14:15the-kyleIt stops successfully and switches to recording mode.
17:14:43the-kyleBut then it freezes at the file browser the next time I try to open it.
17:15:36 Join freqmod [0] (~quassel@cm-84.215.142.108.getinternet.no)
17:15:39Tornesaratoga: you need to do the local setup steps in every repo, yes
17:15:49Torneif you use the same ssh key on every machine you don't need to touch anything on the server
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17:15:58Tornebut if they ahve different keys you need to add all the keys on the web too
17:16:42the-kyleBuffer size: 3.99GB. This looks funky.
17:16:51saratogaah yes i got it
17:17:01saratogafunman: dry run doesn't tell me what its actually committing though
17:17:10gevaertsthe-kyle: that's slightly less than zero, probably :)
17:17:24saratogai just want to check what will actually get pushed
17:17:26Tornesaratoga: git log origin/master.. will show you all the commits you have locally that are not already there
17:17:49Torne(the .. means "difference between" and the missing second argument defaults to "the HEAD of the current local branch")
17:17:59the-kyleWow! Looks like it will work nearly perfectly very soon then. Great work!
17:18:03saratogais there some way to see the code though?
17:18:13saratogai basically want to do svn diff
17:18:19saratogaso i can see what i'm about to change
17:18:44Tornegit log -p will show the patch for each commit.
17:18:49Torneor you can just git diff origin/master
17:19:01Torneto see a single diff that is the difference from the master branch to your local branch
17:19:25saratogaI thought i had to commit stuff before git would push them?
17:19:37saratogaisn't git diff just showing me all differences, not the ones i've committed?
17:19:42the-kyleUpon turning on the device, the buffer size is shown as 133KB.
17:20:08Tornegit diff can compare anything to anything
17:20:24saratogaso how do i get it to show me just what i'm about to change on the main repo
17:20:38Torneit depends what command you are about to run to push :)
17:20:44the-kyleBuffer size is showing 3.99GB when I play a Vorbis file also.
17:20:46Tornepossibly you want git diff origin/master HEAD
17:20:57Tornewhich is the difference between the server's master and your latest commit
17:21:13Tornethis will be the same as just `git diff origin/master` unless you have local changes you haven't committed
17:21:16saratogathat shows a bunch of stuff i didn't think i committed
17:21:21saratogaalthough maybe i did by accident
17:21:25saratogai admit i have no idea what any of this means
17:21:37Tornesaratoga: your local branch is probably out of date with respect to master
17:21:47Torneso you are also seeing the *reverse* diff for everything that' sbeen committed since you updated
17:21:50Torneif that makes sense
17:21:58saratogano its all stuff i changed
17:21:58Tornedo `git pull −−rebase` first
17:22:07saratogalike adding the test codecs to SOURCES
17:22:24Tornewell, if they show up when you do `git diff origin/master HEAD` then you committed them
17:22:33saratogacrap
17:22:39Torneis there only one commit in the log command i suggested?
17:23:36saratogatwo, but one is the commit i just sent in through gerrit
17:23:42saratogaso i guess that needs to be rebased
17:23:55saratogabut i don't see the stuff i do on diff
17:24:20Tornedoes git status say you have any local changes at all?
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17:25:01saratogayes it shows the two commits
17:25:11saratogathe one from gerrit and the one i want to add
17:25:14Tornei mean, local changes to files
17:25:47saratogaah yes it shows two files modified
17:25:58saratogaplugins/SOURCES and somethign in firmware
17:26:00Torneso you have a bunch of different things :)
17:26:14Torneanyway.
17:26:17Tornerebase, first
17:26:27Torneso it will stop thinking you have two local commits taht aren't submitted.
17:26:34saratogagit pull −−rebase?
17:26:34Tornethen look at git log -p origin/master..
17:26:37Torneyes
17:26:44Tornethe log should just have one commit in, then
17:26:52saratogait complains that i have changes
17:26:53Torneand the diff attached to it is hopefully the diff you meant to commit
17:27:02Torneyeah, it will. :)
17:27:14Tornestash them first
17:28:04saratogahuh pull says i'm up to date
17:28:06saratogawhich can't be right
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17:28:30TorneYes it can :)
17:28:42Tornein fact, it almost certainly is, and you are mistaken
17:28:44Torne:p
17:29:17saratogagit diff still shows other peoples commits though
17:29:17derfWhat did I say should be okay?
17:29:22saratogashouldn't rebase fix that?
17:31:52saratogai just want to add one line of code, is there someway i can delete my git repo and check it out again without having to redo the gerrit setup?
17:31:59Torneyou never need to delete the repo
17:32:06Torneno matter what you do, prettymuch
17:32:35Torneif you really want to get rid of the stuff you have done locally, git reset −−hard origin/master will blow away the current branch and make it identical to the server again, including destroying local uncommitted changes
17:33:01Tornei wouldn't suggest you do that because whatever state you are in you probably should work it out so you don't do it again :p
17:33:06Tornebut if you really can't be bothered that will work
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17:45:05funmanderf: you said opus decoder should fit in clipv1 ram no ?
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17:45:57derfI might have. How much does it have?
17:47:39funman384kB for the codec iirc
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17:47:58derfYeah, I agree that should be plenty.
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17:53:12the-kylefunman: derf: As far as I can tell, it's very, very close. Only place I have trouble is when I try to stop playback and return to the main menu or when I try to open the file browser while an Opus file is playing.
17:53:45derfthe-kyle: I don't know enough about Rockbox to know why that in particular would be a problem.
17:54:16***Saving seen data "./dancer.seen"
17:54:18the-kyleAnd there's still a little sluggishness when voice clips are played at the same time as an Opus file.
17:54:54the-kyleBut I expect both problems will be worked out very shortly. It's already progressed faster than I had imagined on this device.
17:55:43the-kyleBoth 64k and 128k play in realtime now. I haven't tested 256, but I think that's overkill on a 2GB player.
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17:57:03*the-kyle most likely will use 64k on this device, but may use 128k at times also.
17:57:58the-kyleNeither bitrate is causing more or less problems in memory than the other.
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17:58:57the-kyleIf it makes a difference, I've been setting the framesize to 60ms when encoding. I could run some tests with default framesize settings.
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18:02:13n1sfunman: the clipv1 config #defines CODEC_SIZE 0x48000 which is 288k, is it bigger than that?
18:03:25n1sthe-kyle: do you have a clipv1 and is your build unmodified?
18:05:15the-kylen1s: I do have a clipv1, but it's currently running a modified build with hotkey and WPS announcement patches. I can run an unmodified build on it, as I do keep a clean unmodified git tree available for testing.
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18:10:41n1sthe-kyle: those modifications shouldn't matter, i meant if the opus codec was unmodified. So it's working now? i remember it crashing for you, any idea when that stopped?
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18:12:21saratogathe clipv1 has 288KB of codec memory
18:13:20the-kyleIt crashed when I built it on Monday, but I tested it after rebuilding today and it works.
18:14:12the-kyleLet me look at my opus codec. I may have cept the -Os flag.
18:14:17the-kylekept
18:14:44the-kyleSo the Makefile may be modified still.
18:16:10the-kyleI do still have the -Os optimization set. Let me change it back to the default -O2 and see what happens.
18:16:56Buscheln1s: did you have time to test / measure the updated patch?
18:18:15saratogai would check the map file and then log mallocs so that you can see how much (if any) extra memory is needed
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18:19:39Buschelthere he is :)
18:19:49Buscheln1s: did you have time to test / measure the updated patch?
18:20:28n1s_webBuschel: nope but i can do it soonish
18:21:04Buschelfije, i am still curious ;)
18:21:11Buschelahem, "fine"
18:21:15n1s_websaratoga: i did check out how much memory it needs and i'ts something like 320k iirc, definitely more than 288k atm at least
18:21:54n1s_webthat global stack is 100k and afaict that's fairly arbitrary
18:22:01derfIt is.
18:22:09derfStill need to sit down and compute what the real limit is.
18:22:10saratogatheres 320KB of total IRAM, but about 30KB is allocated for core features
18:22:34saratogadoes opus use the normal codec malloc?
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18:22:44the-kyleIt's playing with -O2, but it has lots of warbles and blips.
18:23:01the-kyleIt plays perfectly using -Os instead of -O2.
18:23:10the-kylebut crashes on stop
18:23:10n1s_websaratoga: yeah it allocs a few large buffers with it but then does it's own stack thing
18:23:33saratogai'd be surprised if the codec alloc think didn't check for overflow
18:23:39the-kyleI also get the same crash on stop with -O2.
18:23:42saratogaAFAIK its handled gracefully on things like AAC
18:24:10the-kyleThis is the 64k test. Trying 128.
18:24:19saratogamight be neat to print out the malloc pointers and see where exactly they end up in relation to the map file
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18:24:40the-kyle128k plays a very small part of the file and stops.
18:24:58the-kyleIt plays about 0.1 to 0.2 seconds.
18:25:34the-kylefollowed by a hard freeze. All this is fixed by using -Os optimization instead of -O2.
18:28:51saratogawait, which malloc does Opus use?
18:29:35n1s_webthe codec_malloc
18:29:50n1s_webbut the return isn't checked in opus in a lot of places
18:30:12n1s_webso a nullpointer deref bug is quite likley imo
18:30:29derf"A lot of places"?
18:30:36derfAFAIK only the global stack alloc isn't checked.
18:30:55derfWhat others have you found?
18:31:34saratogaah ok i thought it was using the more complicated malloc
18:31:46derfThe libogg stuff does.
18:31:55derfBut all of that should be checked.
18:32:29saratogag#292 might be useful here
18:32:32fs-bluebot3Gerrit review #292 at http://gerrit.rockbox.org/r/292 : Introduce new logging system to codeclib. by Michael Giacomelli (changes/92/292/7)
18:32:34derflibopus itself only mallocs when you create the decoder context and for the global stack.
18:32:37saratogacould log malloc fails
18:32:48n1s_webderf: i just grepped for opus_alloc, the three places in rate.c aren't checked but i'm not sure that's even run
18:32:56derfn1s_web: It's not.
18:33:54derfcompute_pulse_cache() should only be used if you've enabled custom modes.
18:34:09derfWhich I hope you haven't (for code size reasons if nothing else)
18:34:25n1s_webno we haven't i wasn't checking thoroughly enough
18:39:44n1s_webthe allocation of the output buffer (which is quite pointless since it's statically sized but w/e) is not checked, that's not libopus code though but our codec
18:40:58saratogacan you just get rid of the dynamic allocation?
18:41:34n1s_webyeah should be trivial
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18:43:22saratogacan the global stack also be done at link time? or does it somehow change size?
18:43:42n1sno, i't sstatically sized too
18:44:36saratogaah nice
18:44:47saratogawhat must be dynamically sized?
18:44:50n1sonly the libogg stuff is truly dynamic
18:45:01n1s(AFAIK)
18:45:12n1sand as long as we don't use custom modes
18:45:28saratogadoes the libogg stuff use free?
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18:47:51n1ssome functions call free but i'm not sure if they are ever run, the code_free function is umm, pointless :)
18:48:54saratogayeah
18:53:06n1sin a quick straignt test_codec run it doesn't ever call codec_free
18:59:07derfThe libogg stuff uses realloc.
18:59:15derfI don't know if that's a problem for your codec_alloc.
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19:00:06n1sdecoding the 64kbps test file on the sim codec_mallocs a total of 212kb
19:00:34derfI'm guessing there's more than 76 kB of code on top of that.
19:04:20n1syeah, the codec binary is currently 100k on the clip
19:04:45n1sso some alloc has to be failing silently
19:07:36n1safaict the global stack alloc is not checked
19:08:17derf12:30:37 < derf> AFAIK only the global stack alloc isn't checked.
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19:11:25n1sderf: ah missed that, well it's the last alloc done and the biggest so if that isn't checked, well mystery solved
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19:29:56funmanderf: btw that 384kB includes the code (.text .rodata .data .bss)
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19:34:39n1sfunman: so it *is* using some other ram than just the iram?
19:34:47n1sor what?
19:37:44funmanno
19:38:28funman#define CODEC_SIZE 0x48000 /* in IRAM */
19:38:54n1sthat's 288kB
19:39:14funmanyeah, we keep 64kB for memcpy/memset etc
19:39:23funmanso 320kB - 64kB = 288kB left only for codec
19:41:22n1sanyway, that's less than the codec needs atm
19:41:33n1sany idea what's at adress 0 on the clipv1
19:41:36n1s?
19:43:24n1sif the global stack alloc fails as i think it would write to a null pointer
19:44:30funmanreset vectors
19:44:55funmanfirmware/target/arm/as3525/app.lds should help
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19:46:29n1sright, if those were overwritten it would be very unlikely that it would keep running, no?
19:46:53n1sunless there's some unused allocation from this stack pointer at the start
19:52:03derfI don't think there is.
19:52:44derfIf you're calling opus_multistream_decode(), the first thing it does is allocate a buffer to store the decoded audio for a single channel pair.
19:53:40n1san easy test would be to increase the global stack size so the alloc fails on the sim and see if it segfaults and check it out with gdb if it does
19:54:18***Saving seen data "./dancer.seen"
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20:53:44n1sfirst global stack alloc is in opus_decode_frame and that's a pcm_transition buffer (960b for stereo 48kHz) that is only used sometimes (not for my test file)
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20:53:52n1sso yeah this could work
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20:58:21derfn1s: Are you not using the multistream API?
20:59:11n1sdoesn't look like it but i'm not familiar with the api's availible, there's no opus_multistream_decode() function at least
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21:00:00derfIf you tried to get rid of unused code, you might have deleted opus_multistream.c.
21:01:10n1si haven't deleted any files so it wasn't in the initial commit
21:01:19derfHuh.
21:01:31derfWell, it's in the upstream repository :).
21:02:09 Quit Thra11_ (Ping timeout: 260 seconds)
21:02:29derfThat's not going to help speed or memory usage, though.
21:02:38n1shttp://git.rockbox.org/?p=rockbox.git;a=commit;h=1b8e380 no such file, but a note that multi stream files may not be parsed correctly
21:02:57n1sjust wha'ts a multi stream file inopus anyway
21:02:58derfBut it _will_ let you play files like that from the guy in here who was complaining his file encoded with -uncoupled didn't work.
21:02:59n1s?
21:03:33*the-kyle had the uncoupled problem.
21:03:44derfn1s: You can stuff data from multiple streams into a single Ogg packet, and then when it decodes them, map them to different output channels.
21:03:53derfIt's how Opus scales beyond just stereo coupling.
21:04:26Buscheluncoupled problem: http://www.rockbox.org/tracker/task/12754
21:05:00the-kyleBuschel: Thanks. Saved me having to try to find the fs# again.
21:05:07Epicanis(Random butt-in question: when would you WANT to use uncoupled stereo?)
21:05:41saratogai guess if you had multiple channels that were not spatially related
21:05:56the-kyleSee fs#12754. There are a couple of example files that link from there.
21:05:57fs-bluebothttp://www.rockbox.org/tracker/task/12754 3Opus decoder fails to play stereo tracks encoded with the "−−uncoupled" option (bugs, unconfirmed)
21:05:58n1sbtw my sim experiment went as expected, with a 2MB global stack the sim segfaults when writing to a var allocated from it
21:06:15derfGreat.
21:06:57the-kyleThe example files include a binaural beat that consists of two tones, the difference in frequency generates a sympathetic brainwave.
21:07:17the-kyleThese tones by nature cannot be spatially related.
21:07:32n1sderf: well, we don't support more than stereo output even if there's a device we run on that can do it so decoding multichannel stuff is not of much interest to most rb developers :)
21:08:03saratogacoupled should probably work fine anyway as long as the bitrate isn't very low
21:08:10n1sthe uncopuled stereo is an edge case imo but perhaps that should be fixed by someone
21:08:15saratogausually you want an option to not combine the channels to improve compression
21:09:20the-kyleIf the example files have been encoded with no coupling effects, meaning that each channel still plays separately and independently, then uncoupled is not a problem.
21:09:30n1sat least it's a secondary concern to getting the codec to work well for regular files
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21:11:25the-kyleAt 128k, I didn't notice any coupling when playing a split track that had music on one side and background vocals on the other. Not sure about 64k though. This is different from the examples in fs#12754, but is another case where two channels will need to be encoded independently.
21:11:25fs-bluebothttp://www.rockbox.org/tracker/task/12754 3Opus decoder fails to play stereo tracks encoded with the "−−uncoupled" option (bugs, unconfirmed)
21:11:40derfn1s: Well, ideally you should accept more channels (if the CPU is powerful enough) and downmix to stereo.
21:12:01derfThis is, e.g., what Firefox does.
21:12:18n1sderf: yeah we can't even decode in realtime on several targets for the high bitrates yet :)
21:13:22n1sso multiplying the cpu time needed as well as requiring a lot more memory which would mean using slow ran for hot buffers just to decode, and then doing a good job downsampling, not likely i think
21:13:30n1sslow ram
21:13:56n1sat least not on the slower targets, on the very fast ones, perhaps if anyone cares enough
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21:17:00Buschelbtw, nobody added opus to our manual yet... i thought this would be mandatory for new codecs :)
21:17:53derfn1s: I understand it's not a priority, I'm just saying in an ideal world...
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21:18:47n1sderf: yeah, but the downmixing is really unlikely i think
21:19:30n1si guess supporting the uncopuled stereo files shouldn't be too hard
21:30:39n1sanyway, disabling most of the unused code, the new static iram stuff, the arm asm, perhaps reducing the globl stack size and building with -Os the codec should fit on the clipv1
21:31:43n1sBuschel: your patch saves 9.5MHz on the 64kbps file on h300
21:32:03ProdicusJust out of curiosity, if you encountered a multichannel opus recording and wanted to play it on a device which only supported stereo opus files, what kinds of processing (presumably on the pc) could you do other than decode->downmix->re-encode which has generation loss?
21:32:06Prodicuse.g. I'm guessing it'd be entirely possible to write something that would simply discard all but one channel pair; that'd have limited usefulness, but...
21:33:08Buscheln1s: more than expected! it saved ~9 Mhz on pp as far as i remember...
21:34:13derfI'm working on global stack measurements.
21:34:48derfSo far I'm over 64 kB for fixed and I haven't even gotten out of celt_decode_with_ec() yet.
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21:47:53n1sBuschel: the comb filter could probably be done a lot better in asm for both cf and arm
21:48:35Buscheldefinately. it shouts for load multiple and multiply-adds :)
21:49:47Buschelbut comb_filter only needs few CPU power when the patch is applied.
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21:51:19n1sexactly, if you havent' set up the gerrit stuff i'll try to push more of your patch tomorrow, i'm too tired to trust myself now
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21:52:47Buschelyes, that would be perfect. gerrit is still not set up for me. and before i am more into git i should not try to push anything... thanks for testing and pushing
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21:59:25n1sindeed, more than two thirds of the time both g0 and g1 are 0 when decoding the 64kbps file
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22:01:13saratogawhere is the comb filter?
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22:01:34Buschelcelt.c
22:02:50saratogacould the atrac one you wrote a while back be adapted for that?
22:04:01Buscheli did not check this, but the remaining cpu time is only ~2 MHz on pp. it will be more effective to focus on the ifft
22:04:41saratogaoh
22:05:18n1sBuschel: i think they'd be rahter interested in this patch for upstream
22:05:44Buschelwell, derf is reading this :)
22:06:09derfJust a word of advice, relying on me to pay attention is a bad plan.
22:06:14derfI have too many things to pay attention to.
22:06:46wodzpamaury: Regarding e150 firmware - it looks like SYSCFG.EXE or SYSCFG.SYS is starting code. .SYS seems to be plain binary objcopy of .EXE. There is cache initialization very near the entry point which is one of the earliest things made on MIPSes
22:06:53Buscheli will point you to the change as soon as it has been comitted
22:06:58derfGreat.
22:08:41n1si tested doing three loops one gor g0 == 0, one for g1 == 0 and one for neither 0 and it saved another 0.15MHz or so but makes the code a lot less nice
22:09:19Buschelthat was my thought as well. this way readability is much better
22:10:34Buscheln1s: did you my comment from yesterday about decode_pulses()?
22:11:21n1syeah, but i forgot about it again
22:11:35Buschel-> n1s: the profiling results i know show that decode_pulses() uses a reasonable amount of cpu time. what could be interesting on cf is to move the following variables to iram: u[] in decode_pulses(), iy[] in alg_unquant() and maybe also INV_TABLE[] in cwrs.c. on PP this has only few impact (~0.4 MHz faster), but on cf this might scale much better. those arrays are quite small and often used...
22:12:19Buschelon pp RAM access is cheap, maybe on cf this could be of more interest
22:12:45n1syeah, i think it was derf or someone else in #opus that said the whole thing could be replaced by a small function and a LUT
22:13:04n1sso i was kind of hoping that would happen :)
22:13:58Buschelsounds good, the code now looks quite.... complicated
22:14:21derfIf you look at http://people.xiph.org/~tterribe/celt/opusdec-0.006-float.tar.gz you'll find an implementation of that in celtdec.c
22:14:38derfIt requires about 5 kB of table data (in celtdata.c).
22:14:52Buschelcheap
22:14:58Buschel:)
22:15:03derfYou can save some cycles by doubling that.
22:15:15derf(right now it takes advantage of the fact that the table is symmetric)
22:15:35n1si guess it's not just copying some code over?
22:16:52derfcelt_decode_pvq() should be basically waht you want.
22:16:57derf*what
22:16:59n1sBuschel: anyway, i did thry putting INV_TABLE in iram earlier but didn't see any difference
22:17:17 Quit perrikwp (Ping timeout: 260 seconds)
22:17:34Buscheln1s: the other arrays look more interesting. they're accessed a lot in the current implementation
22:19:35n1sBuschel: we don't define SMALL_FOOTPRINT so the u array is not used
22:20:53n1siy might be interesting though
22:21:05Buscheln1s: why is u[] not used?
22:21:22derfu[] gets used extensively, regardless of SMALL_FOOTPRINT.
22:21:42 Quit mc2739 (Ping timeout: 260 seconds)
22:21:54n1sheh i totally misread the #endif as #else
22:22:38n1swow
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22:26:19Buschelwow = you already tested it?
22:26:31n1sno, wow = i can't read
22:27:37n1si've no idea what K can be but lets' see if it fits on the real stack
22:28:11derfIIRC, K is at most 128.
22:28:28Buscheljust wanted to write the same ;)
22:28:28derfEarlier we allowed up to 32767, but I think we eventually got rid of that.
22:28:34n1sshould be good then
22:28:57n1sit comes from some bitwise magic i'm too tired to figure out
22:29:30derfrate.h says MAX_PULSES is 128.
22:29:51Buscheli was stumbling over that bit-magic as well and decided to simply measure it for the test files
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22:34:45n1sah, it saved 12.7MHz so yeah wow, i can't believe i just ignored the part after the #endif :)
22:35:08Buschelcool, that's rather impressive :)
22:36:23Buschelyou moved both arrays (iy and u) to iram? or just one of them?
22:36:34n1sjus u
22:36:38n1sjust
22:36:53n1sit doesn't even increase the peak stack usage
22:37:05Buschelwell, then let's see what happens when iy is moved to iram as well :)
22:39:37derfGenerally there's one write to each element of iy[] in decode_pulses().
22:39:47derfWhereas u[] is accessed O(NK) times.
22:40:07derfBoth reading and writing, and the constant out front is bigger than 1.
22:41:24n1siy gives another 2.7
22:41:47Buschelquite reasonable
22:42:24Buschelhow many MHz does the 64kbps file need on h300 now?
22:43:02n1sthese changes on top of your patch (and my extra change to comb_filter) needs 80.45 now
22:44:49n1smaybe even higher bitrates are realtime or close to it now
22:45:19n1sstill no increase in stack usage
22:46:11Buscheli would expect 128 kbps to work now, but not 256 kbps still should require too much cpu for realtime
22:50:47n1sany idea what N can be?
22:52:42Buschelno, i tested quick-and-dirty with 1000. maybe derf can give some details
22:52:50derfn1s: 176, I believe.
22:53:09Buschelis there a define that can be used?
22:53:16derfNo.
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22:54:25Buschelso, we should add our good old if-statement to keep the dynamic allocation if the static is too small
22:54:29derfIt's the difference between the last two values of eband5ms shifted by maxLM.
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22:58:37n1sah yes, i wish there were more comments or some more descriptive var names in this code
23:00
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23:00:21Buscheli am curios what a profiling would look like after all those changes.
23:01:59derfn1s: I blame all those problems on jmspeex :).
23:03:21n1sBuschel: yeah, i'll try to redo them on cf when i find time, might not be before the weekend, have you tried running a profile on arm?
23:06:06Buschelno, i only commented some functions to get an educated guess. what do i need to do to run a real profiling? just building woith profiling enabled and letting it run?
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23:26:44Buscheln1s: hmm, i tried to build like desribed here: http://www.rockbox.org/wiki/SourceProfiling. but it does not work for me. can you provide me a small patch as example how to change the code to get profiling enabled for opus?
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23:31:32Buschelhowever, need to get some sleep now. see you tomorrow
23:31:36 Quit Buschel (Quit: ChatZilla 0.9.88.2 [Firefox 15.0.1/20120905151427])
23:32:57n1sBuschel: i think i've lost the patch but it's fairly simple, 1) enable profiling when configuring 2) add -finstrument-functions to the codec CFLAGS (either by figuring out how to use the Make var PROFILE_OPTS or just hardcoding for now) 3) add ci->profile_thread at the beginning of codec_run and ci->profstop right before the return in codec_run
23:34:17n1srun a regular benchmark with test_codec (will take a lot longer than usual) the profile_reader script has user help that should be all you need
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23:39:07 Quit ender` (Quit: With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead.-- RFC1925)
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23:53:46 Part LinusN
23:54:24***Saving seen data "./dancer.seen"

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