Error with reading Dragalia acb file

[RagdollClash]

When using a batch script to extract every acb file, I ended up finding this file where the program just crashes on.
VO_CHR_INGAMESTORY_00_05.zip

[hozuki]

I'm quite busy these weeks. I won't be possible to investigate this issue until next week.

[hozuki]

I found the problem. Unlike common ACBs, this file has no WaveformTable table. This affects how to locate the files (labeled by cue IDs, which are computed using the info from waveform and reference tables) in internal/external AWB.

A possible workaround is:

• assuming the AWB is always an external one ("streaming") the files are always in the external ("streaming") AWB
• assuming the encoding is always HCA
• try to map names in cue name table with files in AWB by index instead of ID
• and short circuit some format validation code

[hozuki]

I don't know how frequent this happens and whether this is another hidden "feature" in the offical format library. If they exploit confusing default behaviors (like this one) on purpose, I am tired of playing this game.