ibaker 0fa66534fe Use CuesWithTiming.durationUs in SubripParser instead of empty cues
This fixes two things in one go:
1. In order to indicate 'end of a cue' **without** relying on
   `CuesWithTiming.durationUs`, `SubripParser` should have been emitting
   an empty `List<Cue>` instead of the current behaviour of a
   single-item list with `cue.text=""`.
2. There's no need for the empty cue (or cue list), we can use
   `durationUs` to indicate the end of each list of cues.

There's no real need to ever have a `Cue` with `text=""`, so also
deprecate `Cue.EMPTY`.

PiperOrigin-RevId: 548938874
2023-07-20 10:18:09 +01:00
..

Extractor module

Provides media container extractors and related utilities. Application code will not normally need to depend on this module directly.