XeNTaX

Almost all game resources have been compressed into DAT files. I tried many methods but could not unzip them.
Here are some sample files:
https://drive.google.com/file/d/1-WvCvk ... p=drivesdk
If you know something about these contents, please give me some ideas or tell me how to decompress them. Thank you

I've had a quick look at this and the format is using Zstandard for compression.

There is an uncompressed header, followed by a compressed file table containing FileTableEntry structures, followed by each file's compressed data in order of the FileTable. Using the header you read FileTableCompressedSize bytes and Zstd decompress to get the FileTable, then iterating each FileTableEntry you read entry.CompressedSize bytes and Zstd decompress to get the raw file.

FYI it looks like some files are actually PKZip archives despite their file extension e.g. "ancient_divine_wind_eyes.tga" is a PKZip archive containing two ktx files.

Thank you very much for your reply.
I tried the method you provided, but there seems to be an error. Is it that I lack any dependence? Or I made some mistakes.
Finally, thank you very much

Here is some sample code in C# which might help provide reference for your script. I've run this through all of your sample files again and everything is parsing correctly for me.

Based on the error I would assume your decompression isn't right as the first 4 bytes should be an integer below 256 e.g. "?? 00 00 00" so cannot be negative. You might also want to double check everything is in Little Endian.

If you can share your script someone might be able to pinpoint the issue (I'm not knowledgably of BMS unfortunately but will have a go).

barncastle wrote: ↑Fri Aug 12, 2022 5:35 pm Here is some sample code in C# which might help provide reference for your script. I've run this through all of your sample files again and everything is parsing correctly for me.

Based on the error I would assume your decompression isn't right as the first 4 bytes should be an integer below 256 e.g. "?? 00 00 00" so cannot be negative. You might also want to double check everything is in Little Endian.

If you can share your script someone might be able to pinpoint the issue (I'm not knowledgably of BMS unfortunately but will have a go).

really thanks for your detailed explanation,this is very usefulI.And I found the mistake I made.Thankd again

And here's the article for reference:
http://wiki.xentax.com/index.php/Dragon ... egends_PAK

Thanks for sharing, barncastle

barncastle wrote: ↑Fri Aug 12, 2022 5:35 pm Here is some sample code in C# which might help provide reference for your script. I've run this through all of your sample files again and everything is parsing correctly for me.

Based on the error I would assume your decompression isn't right as the first 4 bytes should be an integer below 256 e.g. "?? 00 00 00" so cannot be negative. You might also want to double check everything is in Little Endian.

If you can share your script someone might be able to pinpoint the issue (I'm not knowledgably of BMS unfortunately but will have a go).

Sorry to bother you again, I also want to try the C # code you provided, but I can't find the correct assembly containing the "zstdsharp. Decompressor()" function
It seems that there is no such function in the commonly used datasets on GitHub. If you can, please share the datasets you use. Thank you

fengye wrote: ↑Sat Aug 13, 2022 2:43 pm I can't find the correct assembly containing the "zstdsharp. Decompressor()" function

Sorry yeah I forgot to link the library I used - its oleg-st's ZstdSharp.

barncastle wrote: ↑Mon Aug 15, 2022 11:36 am

fengye wrote: ↑Sat Aug 13, 2022 2:43 pm I can't find the correct assembly containing the "zstdsharp. Decompressor()" function

Sorry yeah I forgot to link the library I used - its oleg-st's ZstdSharp.

Thank you very much.