Playlist import/export

[OxygenCobalt]

Split from #36.

[KraXen72]

from #36:

• ability to import m3u playlist
• ability to export playlist as m3u (ideally with relative paths to the nearest shared parent folder, not absolutely to the sd card/internal storage)
• remembering of m3u file which was imported & button to overwrite playlist contents with m3u contents (refresh) - link

stuff from #36 that might deserve it's own issue?:

• (maybe) SQL/query dynamic playlists
• (maybe) folders as playlists

[OxygenCobalt]

I'm actually unsure whether I'll immediately implement this as stateless import/export, or whether I will track the file URIs and update it that way. The latter is harder to manage and probably requires #322, so I think stateless import/export will come first.

[chxr16]

Would it be possible to import playlists from Listenbrainz? The format is documented here, I think it would integrate nicely with the already existing MBID’s

[OxygenCobalt]

I can, but it would not have any internet fetching. You would need to download the .jspf file and then open it in Auxio @nzure.

[Mikaciu]

Would it be possible to be able to select the directory where the playlists are stored ?

[OxygenCobalt]

Playlists are stored in a database normally, but you will be able to export to any directory allowed by the file picker @Mikaciu.

[Wjxfi]

Great idea

[OxygenCobalt]

Update: Writing a M3U parser is stupid simple, so the backend of this can be easily done. I'm just stuck on the frontend, since I actually want to use menu/"speed dial" functionality so that the "create playlist" button as an option for importing. See the example(s) below:

tt8.mp4

This requires some custom view magic that will take a little bit, so I'm aiming for 3.3.0 for this.

[KraXen72]

1. yes, m3u is a simple format (make sure to also take into account relative links)
2. looks good!

[Wjxfi]

thank you, that's the most important thing to me! And I hope there won't be a problem with exporting a playlist with more than 1500 tracks on android! That would be great!

[OxygenCobalt]

There shouldn't be an issue @Wjxfi, but it might take a little while to import due to it's size.

[Wjxfi]

it's a good thing it is! I will gladly switch from retro music player to yours, as you will not have this error! Very much looking forward to the update! :)

[Wjxfi]

Hey! @OxygenCobalt Please :) waited so long

[OxygenCobalt]

Please be patient @Wjxfi. I am extremely busy with school and will not be able to do significant work on Auxio for a month or two.

[OxygenCobalt]

;)

[OxygenCobalt]

Screen_recording_20231220_132215.webm

Importing from this M3U file:

#EXTM3U
#PLAYLIST:Test Playlist
./Jon Hopkins - Immunity - 01 We Disappear.mp3
../Jon Hopkins - Immunity - 02 Open Eye Signal.mp3

Only relative paths are supported currently. I don't know how to go about absolute paths since android obfuscates the real path of something behind volume abstractions.

[OxygenCobalt]

NVM, absolute paths will be supported too, but under the assumption that they are relative to the volume of the M3U file.

Another additional assumption is the usage of unix-style "../dir/./file" type paths. If any of you use windows-style "C:\" paths, please let me know.

[chocmake]

Another additional assumption is the usage of unix-style "../dir/./file" type paths. If any of you use windows-style "C:" paths, please let me know.

foobar2000 exports such paths for its playlist M3U/M3U8 exports. I recall even old Blackberry's stock music player handling them fine[1], so they're presumably common enough.

[1] How it handled the paths was assuming the drive letter was the root of the exposed file system (so eg: M:\music was understood to be the music dir in the root of the directory tree as seen when file transfer is enabled).

[OxygenCobalt]

[1] How it handled the paths was assuming the drive letter was the root of the exposed file system (so eg: M:\music was understood to be the music dir in the root of the directory tree as seen when file transfer is enabled).

Alright, this sounds like what I can use for Auxio. I'm basically forced to assume the playlist volume is the same as the file volume.

[evanc577]

Will imported playlists automatically update when the m3u file is changed? If not automatically, an option to rescan and reimport all playlists would be good too.

[OxygenCobalt]

Sorry for the delay @evanc577. That's not planned for the MVP since it effectively requires #322 for the best results. Currently there's going to be an "Import" menu option that allows you to reimport a m3u file back into the playlist.

This feature is also basically done. There's some rough edges I need to resolve first regarding when names conflict, but otherwise it should arrive in the next release.

[OxygenCobalt]

Some of the other functionality mentioned here will be spun off into issues once I fully decide on doing them.