XTool 2020 (Main Project)

[Razor12911]

Dude it tried all levels, look at the log via verbose (level 1-22) and none of them produced crc perfect stream and you can even see that with level 19 the original stream was 14692 which was decompressed to 48079 and recompressed to 14688.

Xtool applies patches using xdelta only if you have specified what level was used else for zstd as an example which has 22 levels, each stream would have to be recompressed 22 times and 22 patches will exist and then how would xtool decide what level was used, by looking at which one produced the smaller diff file? because if you look at the log again level 17, 18, 19, 20, 21 and 22, yep 6 different levels produced the same result so how would xtool decide what the best level is? Even if you do it for the first 100-200mb, you may even find that zstd compression on some data even taps out at level 10 and any level higher than this will produce the same result. Xtool will still be confused af as to which level is the best which is why I left it to the user.

Xtool in such a scenario will just trust the user specified level and only help out if any of the streams fail to be properly processed by applying xdelta otherwise it will not apply any patches.

Edit: Verbose mode was added just so that the user can see why xtool fails and if there are patterns, like for example this stream "14692 >> 48079 >> 14688", with 4 bytes difference, I assume that all the streams in this game will show a pattern of 4 bytes also missing, which can mean when the game was compressed the developers turned on checksum mode for zstd, meaning a hash sized 4 byte was added for all the streams just to verify if the data is not corrupt in anyway and xtool uses zstd in default mode meaning checksum option is disabled hence why they produce 4 bytes less.