[ArchiveV2] Oodle compression support

[christianstamati]

Hi,

I tested this in UE 5.7.1 using Easy Multi Save to create the .sav files. Do you know what might be causing the issue?

Level.sav.txt

use gvas::{GvasFile, game_version::GameVersion};
use std::fs::File;

fn main() -> Result<(), Box> {
let mut file = File::open("assets/Level.sav")?;
let gvas_file = GvasFile::read(&mut file, GameVersion::Default)?;

println!("{:#?}", gvas_file);

Ok(())

}

Thanks!

[scottanderson]

I started to implement ArchiveV2 a few weeks ago, but I didn't finish writing the tests. You can take a look at what I have so far here.

[christianstamati]

Thanks!!

[christianstamati]

Sorry, I am not really into rust:

I added the dependency like this:

[package]
name = "gvas_test"
version = "0.1.0"
edition = "2024"

[dependencies]
gvas = { git = "https://github.com/scottanderson/gvas", branch = "archive-v2", features = ["serde"] }

And then I try to parse ti file like this:

use gvas::{GvasFile, game_version::GameVersion};
use std::fs::File;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut file = File::open("assets/Level.sav")?;
    let gvas_file = GvasFile::read(&mut file, GameVersion::Default)?;
    
    println!("{:#?}", gvas_file);
    
    Ok(())
}

I tried one of the example files in /resources/tests/Slot1.sav and it works:

But when trying Level.sav I am still getting the same issue even using archive-2:

[scottanderson]

Okay, I looked at the attached file a little closer, and I'm seeing a couple of issues:

1. You will need to change GameVersion::Default to GameVersion::ArchiveV2 to activate the code path for the new file format.
2. The file appears to be compressed with Oodle compression, which we don't have a decompressor for, so you'll still get Deserialize(InvalidHeader("Unsupported compression type Oodle")).

If you're able to generate files with zlib compression, you should be able to read those with my branch.