Support playlists (with buffering of next track when current track nears the end)

[wbo4958]

Hello all,

I wan't to play 10 songs one by one, auto-switch by STATE_ENDED. When finished the first song, exoplayer will download the second song and prepare to play, so it may result some delay to play second song if bad bandwidth. So I was wondering if there are some policy to pre-load second song when first song is playing?

BR,

[ojw28]

This is supported in dev-v2. You'll need to build a MediaSource for each song that you want to play, then build a ConcatenatingMediaSource that wraps the 10 individual MediaSource instances. If you then provide the ConcatenatingMediaSource to the player, it'll play the tracks seamlessly, maintaining a consistent buffering policy across the transitions.

[nioncode]

How to apply this if we have many (e.g. 100) files in the playlist? Is it possible to just provide a FIFO system, where ExoPlayer asks us for the next MediaSource in the playlist whenever it wants to prepare for the next track? That would allow to lazily populate the MediaSources without wasting memory for having all these tracks in the playlist that might not even be played if the user stops playback before reaching them.

[ojw28]

You could implement your own MediaSource similar to ConcatenatingMediaSource, but backed by something like a Cursor (or whatever). Being able to lazily add to a MediaSource as a direct feature of the library is tracked by #1706.