Hi!

I can't use Kha's clever audio Asset handling because, in my case, the files are loaded from the server at runtime (music player-ish).

When experimenting, I notice that kha.Sound.uncompress() works for decmpressing Ogg files, but that it is in reality unusable: more than 1 second calculations for 1 second of music when running on my two year old Nokia 5 (about 25 times slower than when running the same example in Html5 desktop browser).

So, is there a way to hook into the native audio decoders to ease this burden? Preferrably the same format (mp3?) on both iOS and Android. (As far as I know, iOS doesn't have a built in decoder.)

Or are there other ways (embedding lime or something)..?

// Jonas

If you have a close look at https://github.com/Kode/Kha/blob/master/Backends/Kore/kha/audio2/StreamChannel.hx you will see that what you request is already happening when you use streams. Just take that code and adjust it to your liking.

PS: lol at embedding lime.

The jscompat branch also has an option to use native ogg decompression on the background loader thread for regularly loaded sounds: https://github.com/Kode/Kha/blob/jscompat/Backends/Kore/lib/khalib/loader.c
Can merge that into master if you need it.

Hey, just noticed that Sound.uncompress also calls into the native ogg decoder already. Native meaning the original C code of stb_vorbis, not using some actual hardware decoding. Nontheless your numbers seem very bad considering the current situation. Is your Kha up to date?

I just installed vscode kha extension some days ago.
kodetech.kha-19.2.0

I would have guessed that it's the latest version, but maybe it isn't..?

Wow, will have a closer look at the StreamsChannel..!

Is it possible to manually "feed" the stream channels with data loaded in chunks ("progressive download"-ish instead of actual streaming)?

(I'm working with simultaneous multi-channel playback, and want to make sure that the data loading is spread evenly among the channels.)

Nope, the vscode extension installs a pretty old version because it is itself pretty old because some Robert guy hasn't updated it in a while. Clone it from GitHub (via git clone --recursive), point the khaPath option in vscode to it and your ogg problem should be solved.
Haven't set up the StreamChannel to work like that but doesn't sound like a difficult modification so maybe just give that a try.

Using the current git version makes runtime decoding 10x faster..! Thanks!
Must say that Robert guy is doing pretty amazing work.

Started setting up a mac/xcode/ios installation - looking forward to see how this translates into iOS native...

Oooh, thanks!