iPod touch 4g support

Hi,

I've recently acquired an iPod touch 4g (iOS 4.1) that is not yet fully supported under Linux.

I've
 tried to synchronise this device using Rhythmbox: it ended up with a 
lot of "Genius" and "On-The-Go" empty lists visible on the iPod but no 
music file was accessible, at least from the iPod interface.

In 
fact the file transfer had been completed in 
[iPod]/iTunes_Control/Music/F?? directories and playlists had been 
created in the [iPod]/iTunes_Control/iTunes directory, but something was
 missing for the iPod.

After an iTune synchronisation, I re-accessed the iPod filesystem and sorted out modified files.

I
 found out that music file data are stored in SQLite database files in 
[iPod]/iTunes_Control/iTunes/iTunes Library.itlp directory:
- Library.itdb contains songs data (name, artist, etc.)
- Locations.itdb
 contains songs locations.
(note: there's a backup of these SQLite 
files in [iPod]/iTunes_Control/iTunes/iTunes 
Library.itlp/DBTemp/Backup/iTunes_Control/iTunes/iTunes Library.itlp)


The
 CD covers of the songs seem to be stored in  
[iPod]/iTunes_Control/Artwork directory, but I can't read the files 
(data file):
- ArtworkDB (obviously a database that links songs to ithmb files)
- F30?_1.ithmb (obviously thumbnails)

Some other file were modified in [iPod]/iTunes_Control/iTunes directory:
- IC-Info.sidb (TTComp archive data file; I can't read it)
- iTunesCDB (data file; same problem)
- iTunesPrefs.plist (xml file: the only modification related to music is filesystem space)

Please let me know whether this information is relevant/helpful or not, or if you need more details, tests or files.

Regards.
Greg

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