1.4.0-rc01

This release includes the following changes since the 1.4.0-beta01 release:

• Common Library:
  • Add Format.customData to store app-provided custom information about Format instances.
• ExoPlayer:
  • Fix some audio focus inconsistencies, e.g. not reporting full or transient focus loss while the player is paused (#1436).
  • Fix potential IndexOutOfBoundsException caused by extractors reporting additional tracks after the initial preparation step (#1476).
  • Effects in ExoPlayer.setVideoEffect() will receive the timestamps with the renderer offset removed (#1098).
  • Fix potential IllegalArgumentException when handling player error that happened while reading ahead into another playlist item (#1483).
• Text:
  • Fix an IllegalArgumentException from LegacySubtitleUtil when a WebVTT subtitle sample contains no cues, e.g. as part of a DASH stream (#1516).
• Session:
  • Allow the session activity to be set per controller to override the global session activity. The session activity can be defined for a controller at connection time by creating a ConnectionResult with AcceptedResultBuilder.setSessionActivivty(PendingIntent). Once connected, the session activity can be updated with MediaSession.setSessionActivity(ControllerInfo, PendingIntent).
  • Improve error replication of calls to MediaLibrarySession.Callback. Error replication can now be configured by using MediaLibrarySession.Builder.setLibraryErrorReplicationMode() for choosing the error type or opt-ing out of error replication which is on by default.
• UI:
  • Work around a platform bug causing stretched/cropped video when using SurfaceView inside a Compose AndroidView on API 34 (#1237).
• Demo app:
  • Use HttpEngineDataSource as the HttpDataSource when supported by the device.