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- by OrangeC at 5:30 AM EST on December 1, 2009
- Damn well okay thanks for the info.
- by hcs at 7:14 AM EST on December 1, 2009
- Seems similar to what's discussed for EVE Online, with RIFX instead of RIFF.
That makes it Audiokinetic Wwise, as their site confirms, which has a custom Vorbis implementation. It looks like they've made their format even less standard now, though, as there aren't any identifying strings from a normal Vorbis stream. I can identify a few aspects of the structure, but I don't really know enough to be able to tackle this. Yet.
edited 7:16 AM EST December 1, 2009
Hmm, release notes for 2009.3 say:
Codebooks have been removed from the Vorbis file headers and moved to
a decoder library resulting in less runtime memory usage, less space taken
on DVD, and smaller prefetch loaded in RAM.
Which would explain why I couldn't find anything looking like a standard codebook.
edited 7:22 AM EST December 1, 2009
- by OrangeC at 7:35 AM EST on December 1, 2009
- Yes in the credits for the game it said: it used the WWise. I don't suppose theres any SDK for the WWise tools?
- by hcs at 7:41 AM EST on December 1, 2009
- You can get the SDK from their site (the form doesn't need a valid email). I haven't tried it on these files yet. The EVE guys didn't have any luck and they were trying it with PC games, it's fairly likely that the 360 version is different enough that it's totally unsupported.
- by OrangeC at 8:07 AM EST on December 1, 2009
- yes ive had no luck here either, i found the vorbis decoder lib but im guessing thats probably not useful in this case.
- by hcs at 8:52 AM EST on December 1, 2009
- I'm having a look at it anyway. I looked at the RIFF .ogg files this produces, they seem similar enough to the RIFX that it might be the same version. In particular it looks like the same situation with the codebooks being left out and instead part of the library. It looks like their decoder is a wrapper around Tremor so hopefully I won't have to go too deep.
- by OrangeC at 9:49 AM EST on December 1, 2009
- Okay thanks hcs.
- by pietastesgood at 6:05 PM EST on December 1, 2009
- Great HCS!
- by hcs at 3:54 AM EST on December 4, 2009
- Ok, this does essentially the right thing.
ww2ogg 0.0 converts Audiokinetic Wwise RIFF/RIFX Vorbis to normal Ogg Vorbis. packed_codebook.bin is extracted from the SDK and is needed for the converter to work, as the codebooks aren't stored in the file anywhere. The format is pretty much the same as the standard besides that, but with reserved and unused fields left out of the setup bitstream.
Worked on the one AC2 file you gave, I think. Those of you who know what it sounds like will have a better idea.
- by OrangeC at 6:20 AM EST on December 4, 2009
- Your awesome man thanks.
It appears im getting an error in some files with this header.
http://www.megaupload.com/?d=YZSCWFN8
Gives me unknown chunk type.
edited 6:58 AM EST December 4, 2009
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