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Nickname |
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02:34
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09:32
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10:46
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11:57
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12:11
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15:55
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phe |
got the sound working for macplus Sierra Boxing game by patching emscripten library_sld.js: https://hastebin.com/uxixirahoz.js |
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15:55
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phe |
and in pce-macplus.cfg set cpu speed = 1 |
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15:55
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phe |
it's a bug in empscripten imho |
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16:12
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SketchCow |
Generally? Or in the case of this? |
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16:12
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SketchCow |
Like, is this a sound improvement patch? |
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16:36
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phe |
should work with all, even not PCE based if they request weird sampling rate |
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16:37
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phe |
See the code and the comment which is in library_sld.js 'An implementation must support sample-rates in at least the range 22050 to 96000.' but dunno why they allowed not the range but some discrete value |
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16:39
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phe |
so commenting these line allow any freq < 96000 |
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16:44
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bai |
well...if it's not resampling within the range, if what the app supplies is at an in'between value it'll play too fast/pitch shifted |
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18:26
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DFJustin |
why is it using library_sdl.js and not the full SDL port |
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18:27
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bai |
sdl 1.3 vs 2.0 |
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18:51
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db48x` |
I compiled it with SDL2 the other day, but haven't actually done anything with it yet |
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18:51
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db48x` is now known as db48x |
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18:53
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db48x |
phe: but I'm also leaning towards setting speed=1 |
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18:54
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db48x |
phe: coupled with a change to the outer loop that calculates the right number of cycles to execute each time through |
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18:54
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Vito` |
I suspect some of the performance issues will go away if SDL2 would work |
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18:55
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Vito` |
but also you can't actually support any sample rate, right? |
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18:55
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Vito` |
the browser still needs one specific sample rate |
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18:55
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phe |
speed = 0 is likely to ask for trouble |
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18:55
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Vito` |
we tested for that and set it in the original jsmess loader |
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18:56
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phe |
bai, sure, but what the best path, ask browser to implement the psc with resampling or do it in each emulator needed it? |
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18:56
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phe |
*spec |
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18:56
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bai |
Vito`: the browser can definitely accept a number of different sample rates, all the standard ones |
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18:56
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bai |
it just doesn't do weirdo inbetween ones |
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18:56
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db48x |
Vito`: yea, PCE only supports one sample rate, but SDL2 does have SDL_ConvertAudio which I can presumably use |
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18:56
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phe |
look like ff nightly resample correctly for PCE |
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18:57
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Vito` |
bai: is that recent? they didn't use to |
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18:57
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bai |
yeah, if sdl can't do the conversion or there isn't a library I'd be surprised |
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18:57
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bai |
https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/sampleRate |
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18:58
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bai |
that doesn't list the possible values, hmm |
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18:58
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bai |
I think there's an api call to get a list of sample rates your system supports |
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18:58
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phe |
I think that's different, the audio context use hardware capabilities but the input source can get different sample rate afaics |
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18:59
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bai |
yeah |
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18:59
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Vito` |
bai: https://github.com/jsmess/jsmess/issues/82 |
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18:59
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phe |
https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/createBuffer |
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18:59
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Vito` |
at least in 2014, each browser supported only one sample rate, and you had to deliver audio at that rate for the best quality |
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19:00
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Vito` |
so we detected it and told mess to output at that, which meant it resampled internally |
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19:01
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bai |
hmm, dunno. I've definitely played around with a variety of different samplerates when doing webaudio stuff, but it's not really my strong suit so maybe this comes in through a different set of nodes than I was working with |
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19:05
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db48x |
SDL2 still wants us to resample it, but I can try changing from SDL_OpenAudio to SDL_OpenAudioDevice and asking it not to change the sample rate |
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19:06
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db48x |
heh: |
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19:06
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db48x |
missing function: SDL_OpenAudioDevice pce-macplus.js:1:3592 |
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19:12
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db48x |
aha! |
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19:12
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db48x |
requested audio format: freq=22255; format=32784; channels=1; samples=512 pce-macplus.js:1:583415 |
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19:12
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db48x |
obtained audio format: freq=22255; format=32784; channels=1; samples=512 pce-macplus.js:1:583415 |
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19:13
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db48x |
but then ReferenceError: assignment to undeclared variable SDL2 :P |
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19:18
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db48x |
Invalid function pointer '768' called with signature 'vii'. Perhaps this is an invalid value (e.g. caused by calling a virtual method on a NULL pointer)? Or calling a function with an incorrect type, which will fail? (it is worth building your source files with -Werror (warnings are errors), as warnings can indicate undefined behavior which can cause this) pce-macplus.js:1:3592 |
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19:43
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db48x |
https://github.com/db48x/retroweb-pcejs-jsdf/commit/3d39f826c85090b4aa82759020b4ef135fb7a94e |
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19:44
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db48x |
I can't figure out the function pointer error |
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19:46
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* |
db48x recompiles with -g4 |
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19:52
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db48x |
somehow that's even less helpful |
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20:05
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SketchCow |
I'm sorry I can't get c in here yet, like azakai indicated |
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21:12
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21:12
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21:12
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21:12
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21:16
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21:16
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21:16
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21:16
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21:16
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21:16
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21:16
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ircd.choopa.net sets mode: +oo SketchCow bai |