CastPlayer returns wrong currentMediaItemIndex when cast is stopped

Version

Media3 release branch

More version details

1.3.1

Devices that reproduce the issue

Samsung Z Fold 4 (Android 14)

Devices that do not reproduce the issue

No response

Reproducible in the demo app?

Yes

Reproduction steps

• open demo-cast app
• add three first media samples to the playlist
• click the play button
• click the next button
• start casting
• seek to the middle of the current media
• start casting

so far everything is correct, media starts to play from the correct position (playlist index is also correct)

• stop casting

media starts to play from the beginning which is incorrect

Expected result

Switching between local and cast players should correctly restore the current index and position.

Actual result

Currently, it works fine when switching from local player to cast player, but the position is reset when switching from cast player to local player.

I'm not sure why, but when the cast is disconnected, CastPlayer loses the current media index. getCurrentMediaItemIndex() starts to return 0.

I saw some kind of index checking in the demo app https://github.com/androidx/media/blob/release/demos/cast/src/main/java/androidx/media3/demo/cast/PlayerManager.java#L285-L299, but this workaround seems to be not good enough. I can observe the same behavior in my codebase.

Media

HLS (adaptive): Apple 4x3 basic stream
HLS (adaptive): Apple 16x9 basic
HLS (1280x720): Designing For Google Cast

Bug Report

• You will email the zip file produced by adb bugreport to android-media-github@google.com after filing this issue.