[mpris] Playlist extension

[Ian Monroe]

On Thu, Nov 4, 2010 at 10:04 AM, Zeeshan Ali (Khattak) <zeenix at gmail.com> wrote:
> Hi,
>
> On Mon, Nov 1, 2010 at 3:53 PM, Alex Merry <kde at randomguy3.me.uk> wrote:
>> On Monday 01 November 2010 15:35:36 Zeeshan Ali wrote:
>>>    How about re-using an existing spec for this:
>>> http://live.gnome.org/Rygel/MediaServer2Spec . This is already
>>> implemented by gnome-dvb-daemon, pulse-audio (stab Lennart for not
>>> caring to update to v2), rygel-grilo and rhythmbox. Yes, I know it
>>> seems very much UPnP-specific but if you read carefully its really
>>> very generic.
>>
>> It could be used, but it is geared towards exposing a media library, with the
>> associated complexity.  For the use cases we have in mind (geared around
>> showing a short "example" list of playlists that can be played, and optionally
>> all the playlsits), it is complete overkill.
>
>  Sorry but that is not true. This spec was originally created by
> Lennart for exposing PulseAudio streams on UPnP network. There are
> only 2 containers he exposed and each container usually had < 2 items
> in them. Most of the metadata in the spec is optional so you can have
> a very simple/slim implementation if that is your need.
>
>> There is also the issue of dynamic playlists, for example, which (in Amarok,
>> at least) don't even have tracks until you start playing them.
>
>  Nothing in D-Bus specs stops you from creating D-Bus objects
> on-demand. Also, you don't need to tie-up the life-cycle of the
> playlist and its associated D-Bus object.
>
>>  Representing
>> them as a MediaContainer2 would be odd.
>
>  I don't know the internals of Amarok to say anything about that so I
> believe you but IMHO some odd code in one media player would still be
> better than re-inventing the wheel.

Ok you make a good point. If we can use this API to just show a list
of playlists without items, then it could be used. And having less
D-Bus APIs is a noble goal.

What about an additional method to allow you to pick a playlist to play?

Ian