| Time |
Nickname |
Message |
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00:36
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SketchCow |
Reading over eating is how I learned about why the British subjugated india |
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00:37
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SketchCow |
Spices, baby |
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00:37
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SketchCow |
Also, there was a secret spice island |
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00:38
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bai |
spices, drugs, and tea - the cornerstones of an empire |
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00:40
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SketchCow |
I bet every time db48x reads about the panama canal, he imagines boxes of PCE |
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00:41
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bai |
each ship going through the locks is like one simulator cycle being passed through the synchronous processing thread |
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00:42
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bai |
the stationmaster has to blow the horn for 30 seconds, and while he's blowing the horn he can't operate the locks, so there's a delay while the sound plays |
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00:42
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00:58
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SketchCow |
And we're like a bunch of longshoremen running along throwing bricks onto the boats to see if they make it through the locks faster |
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01:14
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phe has quit IRC (Quit: Leaving) |
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01:49
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SketchCow |
I think Dan has (wisely) decided to run off to join the panama canal |
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02:58
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db48x |
heh |
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04:31
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08:37
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09:01
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09:01
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10:11
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13:34
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SketchCow |
https://lolcommits.github.io/ |
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14:35
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SketchCow |
https://archive.org/details/softwarelibrary_mac officially has descriptions or has had quality checks for all items. |
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14:41
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SketchCow |
So, regarding sound. Are we stalled? |
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14:41
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SketchCow |
Do we need to bring in more people to look at it? Or something else? |
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17:34
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db48x |
all we need to do is bring in someone who already knows how to fix it |
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17:38
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18:48
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18:49
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azakai |
SketchCow: hi |
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19:04
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SketchCow |
right on schedule |
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19:05
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SketchCow |
alon, we're tryibg to make a javascript emulator not suck at sond. |
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19:05
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SketchCow |
sound |
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19:05
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SketchCow |
db48x can give some insight |
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19:06
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SketchCow |
emulator is at http://archive.org/detaild/softwarelibrary_mac |
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19:06
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SketchCow |
details |
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19:07
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db48x |
azakai: howdy |
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19:19
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azakai |
so i know there is some work on audio workers in browsers, but otherwise I don't think there is much new stuff usable right now |
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19:19
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azakai |
the best person to ask about how to optimize sound in the current tech is clb on #emscripten, but he's on vacation atm |
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19:22
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db48x |
I'll keep an eye out for him then |
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19:22
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db48x |
in the mean time, do you know much about the SDL port? |
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19:23
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db48x |
I've not yet looked into how it's implemented, but what we've noticed is that it seems to play the entire sound buffer every frame |
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19:25
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azakai |
db48x: sdl1 or sdl2? |
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19:26
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db48x |
sdl1 |
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19:27
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db48x |
but let me double-check that |
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19:30
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db48x |
yea, 1.3.0 |
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19:35
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azakai |
ok, then clb is again the best to ask, as he's worked on it more recently then me. but i did work on it earlier. let me take a look |
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19:36
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azakai |
db48x: sdl1 has a few ways to play audio, which api is this using? |
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19:38
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|
azakai |
(raw audio vs an audio file to be decoded) |
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19:39
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db48x |
raw audio |
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19:39
🔗
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azakai |
so Mix_QuickLoad? |
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19:40
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|
db48x |
here's where we open the device: https://github.com/db48x/retroweb-pcejs-jsdf/blob/pcejs-cycles-per-frame/src/drivers/sound/sound-sdl.c#L248 |
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19:41
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azakai |
or OpenAudio perhaps |
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19:41
🔗
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db48x |
OpenAudio |
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19:41
🔗
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azakai |
yeah, openAudio |
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19:42
🔗
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azakai |
ok, i remember clb rewrote this a lot, to try to optimize it. |
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19:42
🔗
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azakai |
might be best to read the code inside SDL_OpenAudio in src/library_sdl.js in emscripten. there are a bunch of parameters there like when to queue more to play etc |
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19:46
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azakai |
the pushAudio functions etc look like the relevant parts |
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19:58
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db48x |
bah, here's something I should have checked earlier: |
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19:58
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db48x |
requested audio format: freq=22255; format=32784; channels=1; samples=1024 pce-macplus.js:1:367033 |
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19:58
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db48x |
obtained audio format: freq=32000; format=32784; channels=1; samples=1024 pce-macplus.js:1:367033 |
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20:01
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db48x |
I require comestibles; backson |
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20:03
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Vito` |
probably a lot of work to convert pce to sdl2 right |
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20:36
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21:09
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db48x |
Vito`: no idea |
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21:09
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db48x |
Hampa Hug has sent me some helpful emails, however |
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21:10
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db48x |
"At every horizontal blank, one byte is read out of the sound buffer and buffered in mac_sound_t.buf[]. At every vertical blank one packet of 370 samples is written to the sound driver using snd_write()." |
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21:10
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db48x |
that's how the original hardware worked |
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21:36
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21:48
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SketchCow |
I have one other question which maybe jvilk can answer. |
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21:48
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SketchCow |
is it possible to compress the hd images? |
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21:48
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SketchCow |
they load in seconds in .gz but 40mb of hard drive is a loy |
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21:48
🔗
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SketchCow |
lit |
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21:49
🔗
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SketchCow |
lot. |
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21:49
🔗
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SketchCow |
and when this is announced, people will go crazy on that one. |
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21:50
🔗
|
db48x |
the ZipFS can't deal correctly when a zip contains only a single file, rather than a directory full of files |
|
21:50
🔗
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db48x |
(or we're using it wrong, of course) |
|
21:52
🔗
|
SketchCow |
brb, rachel birthday dinner |
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21:52
🔗
|
SketchCow |
thabks so much for all this work, dan |
|
22:01
🔗
|
db48x |
yw |
|
22:01
🔗
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db48x |
enjoy dinner :) |
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22:09
🔗
|
bai |
db48x: wait, really? I thought I'd used single-file zips before |
|
22:10
🔗
|
bai |
but, that being said, if the web server is configured properly, it'll be sent gzipped over the wire anyway |
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22:10
🔗
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db48x |
bai: yep |
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22:11
🔗
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db48x |
bai: and I've mentioned that before, but somehow IA hasn't fixed it. |
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22:14
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bai |
just rename the .img or whatever as .html, maybe it's configured to do that by default :D |
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22:25
🔗
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db48x |
lol |
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22:59
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db48x |
oops, that loop is slightly infinite |
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23:12
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db48x |
hrm, not really an improvement: http://erebor.db48x.net:8000/example_macplus.html |
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23:20
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db48x |
ok, that's annoying |
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23:20
🔗
|
bai |
which loop are you changing here? |
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23:22
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db48x |
in snd_sdl_callback I'm resampling the audio to match what SDL has asked us to output |
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23:22
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|
db48x |
I left in the outer while loop, but didn't decrement cnt |
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23:29
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bai |
ah ok. can't we also just tell sdl the format we'll be outputting? or does it only accept one rate? |
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23:32
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db48x |
we do tell it what format we want, but it pushes back and tells us what we're allowed to do |
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23:39
🔗
|
bai |
I see |
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23:40
🔗
|
db48x |
so PCE asks for a sample rate of 22255 (yes), and SDL says "well, 32000 would be nicer" |
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23:40
🔗
|
bai |
"look, if you're going to make me run in this weirdo frankenstein environment, the least you could do is speak to me at a rate I can understand" |
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23:40
🔗
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db48x |
yea |
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23:40
🔗
|
db48x |
I dunno why it doesn't just resample it for us |
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23:59
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|
db48x |
hrm |
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23:59
🔗
|
db48x |
for some reason, I'm getting -32768 every time I read from the source buffer :P |