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List:       kde-devel
Subject:    Re: KIO-MTP development
From:       Bart Cerneels <bart.cerneels () kde ! org>
Date:       2012-01-14 9:09:00
Message-ID: CAMnMsSc7aqV8=MZ1MUbCMdiy8sbqfxwdbB8tRDnq6tU_gZfw5Q () mail ! gmail ! com
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On Fri, Jan 13, 2012 at 15:52, Philipp Schmidt <philschmidt@gmx.net> wrote:
> Hi all,
>
>
>
> this week I started developing a KIO-Slave for MTP since I now have a Galaxy
> Nexus and like accessing it via Dolphin and not having to use mtpfs. You can
> find it on github:
>
>
>
> https://github.com/hefeweiz3n/kio-mtp
>
>
>
> So far it can do very little (Basically listing devices, storages and files
> works, if the right kio-instance gets the cache), but I am working on that.
>
>
>
> Since concurrent access to the devices using libmtp is buggy at best I would
> like to introduce a persistent cache that gets updated when changing
> operations occur or devices get plugged in/removed. Is there any preferred
> way in KDE to do that, or an infrastructure already in place?
>
>
>
> Also, if you have any other ideas or things to say (for example regarding
> the coding style), please do ;). My long term goal is to get this integrated
> into KDELibs, together with a Solid-Component that detects MTP-Devices and
> shows them in Dolphin etc. Help is also appreciated :).
>
>
>
> Regards
>
> Philipp Schmidt

If your intention is to enable MTP solely in Amarok I recommend not
making it a KIO slave but rather (re-)implementing the MTP plugin
directly using libmtp. We've done a KIO slave with specialized
functions to work in Amarok for upnp media-server. Coordinating the
release in kdebase with amarok was problematic with the result that
the feature is still not working for some users with older version of
KDE or slightly different setups. And for achieving good MTP
functionality in Amarok going the route of the KIO slave is
objectively over-engineered, with issues like caching to enable
concurrent access as a result.

I would estimate that a new MTP plugin directly in Amarok would take <
10% of the time and effort of a KIO slave being used in Amarok. So
please consider what your defined goal is. We've recently
re-implemented the USB Mass Storage and iPod plugins in amarok in
about 5 days work for each.

Bart

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