Re: Recovering playback state of multiple playlists and over multiple sessions

[Yuchen Pei]

Yoni Rabkin <yoni@rabkins.net> writes:

> Yuchen Pei <hi@ypei.me> writes:
>
> > Yoni Rabkin <yoni@rabkins.net> writes:
> >
> > > Yuchen Pei <hi@ypei.me> writes:
> > >
> > > > Yoni Rabkin <yoni@rabkins.net> writes:
> > > >
> > > > > Yuchen Pei <hi@ypei.me> writes:
> > > > >
> > > > > > I don't really save or restore emacs sessions.  This is 
> > > > > > because I
> > > > > > have
> > > > > > an emacsclient on all the time until an untimely death 
> > > > > > because
> > > > > > something goes terribly wrong, and if I make it revive from 
> > > > > > that
> > > > > > state
> > > > > > I fear it could go into a death loop.  This is why I would 
> > > > > > rather
> > > > > > have
> > > > > > an emms-specific feature for this.
> > > > >
> > > > > We may be speaking past each other. If you don't restart 
> > > > > emacs,
> > > > > why
> > > > > do
> > > > > you need a function to save the playlist position?
> > > >
> > > > As I said, things can go wrong, and emacs crashes.  Sometimes 
> > > > this
> > > > happens more often than other times.  But especially after 
> > > > long
> > > > sessions of emacs is it hard to recover the position from 
> > > > (my)
> > > > memory.
> > >
> > > This is a slightly different situation that what we've
> > > discussed. Previously, I understood it to be merely saving 
> > > playlist
> > > positions so that they can be restored later. But now this is
> > > described
> > > as a case of hardening Emms against an Emacs crash.
> > >
> > > Therefore, what you are describing sounds more similar to 
> > > Emacs'
> > > auto-save feature.
> > >
> > > What that be a good way of describing it?
> >
> > Thanks for clarifying.  I suppose that covers most of my 
> > usecase,
> > though I think there's not much difference between saving and 
> > auto-saving, as the latter could be simply implemented as a
> > run-at-times with the former if one can tolerate a bit of 
> > loss. 
> > "Saving" is a more universal feature and probably needed by 
> > more
> > people other than me, and I'll be content to have a "saving" 
> > which 
> > I can use run-at-times to risk losing the bit in the time 
> > interval.
>
> In that case, why not solve half of your problem quickly by 
> adding a
> function to `emms-player-started-hook' that iterates over your 
> playlists
> and saves them? That hook is certainly well used in Emms.

Sounds good, but how do you save a playlist which also saves the 
track being played?  As an experiment, I have a playlist with some 
track in the middle currently paused.  I saved the playlist into a 
native playlist, opened a new Emacs instance and loaded the 
playlist from the saved native playlist.  It marks the first track 
as the current track, rather than the one being paused and 
highlighted when I saved it.

--
Best,
Yuchen

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