PluginHelperFactory.getPluginHelper().GetAudioPlay List sometimes returns a NULL

[ralphy]

On my development machine:

Code:

System.Collections.IList PlayList = PluginHelperFactory.getPluginHelper().GetAudioPlayList(out currentIndex, out trackDuration, out playbackPosition);

reliably returns a non null value when playing music from the music library, but on my production system, PlayList often returns a null when playing the same mp3 file (it really doesn't make any difference what mp3 file is being played - If the GetAudioPlayList returns null once, it seems to always return NULL.)

Same 1.0.16 version on both machines, but presumably there must be some other differences for the GetAudioPlayList to behave differently on the two machines.

Am I calling GetAudioPlayList incorrectly for it to work reliably?
Any other suggestions?

I am trying to get details of the file currently being played (ie MP3 tag details and current playback position) in response to an IEventNotification.

[sub]

If you can give me some details about how to reproduce it here, or can supply a plugin that shows the problem, then I'll be able to fix the problem for you.

[ralphy]

If you can give me some details about how to reproduce it here, or can supply a plugin that shows the problem, then I'll be able to fix the problem for you.

sub,

please see email/PM with the plugin. Unfortunately, I am having difficulties in understanding how to repeat the problem - particularly given that is works on one of my machines, but not another. So I'll have to send you the plugin.

Thanks for your help


EDIT:
I've just discovered that on my production system, a PlayList is not returned if only one song is selected to play. If 'Play All' is chosen, then a non null PlayList is returned.

But this is not the case on my development system, where a non null PlayList is returned even if only one song is selected to play.

[sub]

Can you check if the difference between the two machines is the value of the <MusicLibraryAutoQueueFiles> setting in config.xml?

[ralphy]

Can you check if the difference between the two machines is the value of the <MusicLibraryAutoQueueFiles> setting in config.xml?

That's the difference sub - production machine (the one with the problem) was set to false, and the development machine (the one that worked) was true.

Of course, I have no idea why my two systems had this parameter set differently. What is the purpose of this parameter?

[sub]

If its set to 'true' and you play the 5th song in a directory of 25 songs, then it'll automatically queue the remaining 20 for playback. (ie, a simple playlist made from the remainder of the directory)

[ralphy]

I forgot to ask sub, even if MusicLibraryAutoQueueFiles=false, should PluginHelperFactory.getPluginHelper().GetAudioPlayList return a PlayList of one, rather than null? (ie, is the behaviour of GetAudioPlayList meant to be that way?)

[sub]

I've fixed this up for the next release so that it always returns a non-null value when music is playing.