Incorrect state when disconnecting Airplay while the player is seeking

[defagos]

If Airplay is disconnected when the player is seeking, playback does not correctly resume on the device.

Issue overview

• [X] Incorrect behavior
• [ ] Feature request
• [ ] Crash
• [ ] Help / documentation
• [ ] Other: classification

Description of the problem

If Airplay is disconnected when the player is seeking, playback does not correctly resume on the device. The loading indicator spins endlessly. Seeking to an arbitrary location fixes the issue, though.

Environment information

• Library version: 2.0
• iOS version: Any
• Device: Any

Reproducibility

• [X] Always reproducible
• [ ] Difficult to reproduce

Steps to reproduce

1. Open the media player demo
2. Play Apple Advanced Stream using the SRG media player
3. Enable Airplay
4. Seek and disconnect Airplay before seeking ends
5. The player is now in an inconsistent state

[defagos]

Tested with 2.2.2 on iOS 11, this now works.

Moreover, I am now pretty convinced that this was resulting from the exact same problem as described in #44 (no finished seek, leading to undefined behavior).