tianyifeng 2c8d07c2dd Inform DefaultPreloadManager when player uses PreloadMediaSource
Add a new method `onUsedByPlayer(PreloadMediaSource)` for `PreloadMediaSource.PreloadControl`, which will be invoked when the player starts to use the `PreloadMediaSource`, or calling `PreloadMediaSource.preload` while the player is already using that source. `DefaultPreloadManager` will immediately preload the next source when receiving `onUsedByPlayer` event.

PiperOrigin-RevId: 616789121
2024-03-18 04:54:49 -07:00
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Short form content demo

This app demonstrates usage of ExoPlayer in common short form content UI setups.

See the demos README for instructions on how to build and run this demo.