Editing PlayStation archive (PSARC)
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The compression algorithms, the PS3 system, and the .psarc format, allows for 9 compression levels but in the practise only are used level 0 (no compression) or 9 (max compression used as the default compression level) | |||
Compression level 9 for generic file types results as a compression ratio of around 50% of the original size, the final compression ratio can vary for different types of files, usually multimedia files (video, audio, etc) doesnt admits much compression because are already compressed originally (as example, max compression ratio for .BIK video and .MP3 audio doesnt reachs 1% or 2%). For this reason is better to dont compress multimedia files because the size reduction is ridiculous and read access times can be reduced (causing a delay/lag/freeze when trying to load the file) | |||
Very small files (smaller than 100 bytes or so) as well as dummy files (0 bytes) doesnt admits compression because are so small that the compression algorithm is not able to reduce them, they will be stored without compression inside the .psarc archive even when is applyed compression over them. When listing the contents of a .psarc with this kind of files will be displayed with a percentage of 100% and both his compressed and decompressed sizes the same value | |||
Very small files (smaller than 100 bytes or so) as well as dummy files (0 bytes) | |||
<small> | <small> | ||
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*'''Relative''' (default, no flags) | *'''Relative''' (default, no flags) | ||
**Default value when the .psarc is created from command line or an .xml and no special access paths modes are | **Default value when the .psarc is created from command line or an .xml and no special access paths modes are specifyed | ||
**The paths in the '''manifest''' | **The paths in the '''manifest''' doesnt have an slash character at the start of every line, the system accesses the files exactly like if the .psarc was a folder itself | ||
**e.g: '''Folder/File.bin"''' | **e.g: '''Folder/File.bin"''' | ||
**In the games that uses .psarc's without flags (like ''uncharted'' series or ''the last of us'') is | **In the games that uses .psarc's without flags (like ''uncharted'' series or ''the last of us'') is posible to replace the psarc by a folder with the same name of the psarc and his contents decompressed inside | ||
*'''Ignorecase''' flag | *'''Ignorecase''' flag | ||
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==File table== | ==File table== | ||
The compression is | The compression is applyed "per-block", is posible to know the compression level by looking at the zlib header | ||
===Manifest=== | ===Manifest=== | ||
Manifest is the first file inside the psarc filetable, | Manifest is the first file inside the psarc filetable, doesnt appears as a file when using the '''--list''' command and doesnt have an assigned '''ID''' | ||
In windows all the paths uses the slash "\" but when the psarc is created the paths are stored inside the manifest as "/". When making a '''--list''' command over a psarc the slashes will appear as "/" | In windows all the paths uses the slash "\" but when the psarc is created the paths are stored inside the manifest as "/". When making a '''--list''' command over a psarc the slashes will appear as "/" | ||
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There are several versions of PSARC related tools, features has been implemented along the different versions and is hard to keep a record of them, please help filling the info in the page | There are several versions of PSARC related tools, features has been implemented along the different versions and is hard to keep a record of them, please help filling the info in the page | ||
GUI versions are | GUI versions are derivated from the command line versions | ||
==Open PSARC PS3 Extractor== | ==Open PSARC PS3 Extractor== | ||
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</psarc> | </psarc> | ||
</syntaxhighlight>}} | </syntaxhighlight>}} | ||
*The purpose of this XML is to use it as a base layout containing all, but is not | *The purpose of this XML is to use it as a base layout containing all, but is not posible to use it like that, is needed to delete the tags that are not needed for a specific case, the ones that are incompatibles with other tags, and is needed to add paths, etc... | ||
*Some attributes appears as common in the DTD for "create" and "extract" but are not common, some of them has been deleted to avoid mistakes... but probably is needed to delete some more | *Some attributes appears as common in the DTD for "create" and "extract" but are not common, some of them has been deleted to avoid mistakes... but probably is needed to delete some more | ||
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====create by directory==== | ====create by directory==== | ||
Creates a psarc using the contents of a | Creates a psarc using the contents of a specifyed folder and all subfolders. Is only available when using an .xml because command line doesnt allows to specify a source folder | ||
Is the most rude method to create a psarc because all folders and files will be archived alphabetically based in his names (there is no | Is the most rude method to create a psarc because all folders and files will be archived alphabetically based in his names (there is no controll of the ID's that will be assigned to each file in the '''manifest'''). Cant be used to rebuild psarcs | ||
Note in the next | Note in the next examle the file dummy.txt (located in the root of the folder in windows, so considered first) has been archived after BMPfolder1 | ||
{{Boxcode|title=Create_by_directory.xml|code=<syntaxhighlight lang="xml"> | {{Boxcode|title=Create_by_directory.xml|code=<syntaxhighlight lang="xml"> | ||