(Un)zipper?

[gnu]

First of all: this is not a request. I'm just asking if it's possible (CPU speed etc..).

My question: would it be possible to include an unzipper into rockbox? Sometimes you've got a zip-file on your player but you can't use it because you forgot to extract it...
Of course it would be quite impossible to unzip large files (it'd take hours....), but what about small files?

[nls]

There is no need for zip extraction to be real time so i don't see why it would be a problem that the cpu speed in most targets is not that big. But as you say it will probably be very slow :-)

[bluebrother]

You can simply put the portable version of 7zip on your player (like any other portable app) and use that. I don't see a need of running this on the player itself.

[linuxstb]

There is no need for zip extraction to be real time so i don't see why it would be a problem that the cpu speed in most targets is not that big. But as you say it will probably be very slow :-)

I'm not sure what you mean by "real time" when dealing with zip files...

But a zip/unzip implementation in Rockbox is very feasible - the code from the infozip project is extremely portable, and even runs on old 16-bit MS-DOS systems.  ZIP is an old format - meaning it was designed to run on computers with less horsepower than the modern targets Rockbox runs on.

I also think it could  be quite useful - the unzip functionality could be added to the plugin library (thereby making it usable by all plugins, such as the various emulators, enabling them to read data directly from zip files without uncompressing them first), as well as a general-purpose unzip plugin.

The fact that people have long been requesting such a plugin shows that at least those people would have a use for it.

[Mr_Rabid_Teddybear]

I'm not sure what you mean by "real time" when dealing with zip files...

He probably mean something like on-the-fly decompress and playback of audiofiles inside zip files, like some game formats that are served up like that....

But a zip/unzip implementation in Rockbox is very feasible - the code from the infozip project is extremely portable, and even runs on old 16-bit MS-DOS systems.  ZIP is an old format - meaning it was designed to run on computers with less horsepower than the modern targets Rockbox runs on.

Except I had this experience short time ago, I downloaded some zip files (infact from www.rockbox-themes.org) that had been compressed with WinZip 11.0 and tried to unzip them under Debian - no dice! I then tried with 7-zip 4.42, still no dice... I then figured out that WinZip 11 compresses zip files that are not backwards compatible!!!!! Luckily the trialversion of WinZip 11 ran well under Wine....

[Rincewind]

I also think it could  be quite useful - the unzip functionality could be added to the plugin library (thereby making it usable by all plugins, such as the various emulators, enabling them to read data directly from zip files without uncompressing them first), as well as a general-purpose unzip plugin.

A Rockbox zip library could also be useful to make a one-file wps format. But a simple .tar would be enough for this, though. Compression is not really needed in that case.

[bluebrother]

A Rockbox zip library could also be useful to make a one-file wps format. But a simple .tar would be enough for this, though. Compression is not really needed in that case.

I even consider using zip the inferior solution -- it needs much more work as compression needs to get handled and hasn't real benefits. Themes aren't that big size-wise and loading from a tar file is much easier. (I posted a theme file installer plugin on FS, it simply uses tar files, and zip also suffers from no file index issue like tar does which made the integration of tarred theme files I worked on some while ago quite slow.)

[nls]

I'm not sure what you mean by "real time" when dealing with zip files...

Sorry I wasn't expressing myself very clearly, I just meant the no need for realtime as a comparison for what is feasible to do regarding audio codecs and video as zip extraction can take forever and still work nicely :-)

[psycho_maniac]

I even consider using zip the inferior solution -- it needs much more work as compression needs to get handled and hasn't real benefits. Themes aren't that big size-wise and loading from a tar file is much easier.

This is true. Another  thing when using one tar or zip file for wps's is that you wont have to go through and delete the folder and .cfg and .wps files for these theme. just one or 2 things to delete.