ibaker d111976125 Change SubtitleParser interface to support incremental output
This change introduces two new types of method to `SubtitleParser`:
1. `parse()` methods that take a `Consumer<CuesWithTiming>` and return `void`
2. `parseToLegacySubtitle` method that returns `Subtitle`

(1) ensures that in the new 'parse before SampleQueue' world we can
write cues to the `SampleQueue` as soon as they're ready - this is
especially important when parsing monolithic text files, e.g. for a
whole movie.

(2) ensures that during the transition, the legacy 'parse after
SampleQueue' behaviour doesn't see any regressions in 'time to first
cue being shown'. Previously we had a single implementation to convert
from `List<CuesWithTiming>` to `Subtitle`, but this relies on the
complete list of cues being available, which can take a long time for
large files in some formats (with ExoPlayer's current parsing logic).
By allowing implementations to customise the way they create a
`Subtitle`, we can directly re-use the existing logic, so that the
'time to first cue being shown' should stay the same.

This change migrates all **usages** to the new methods, but doesn't
migrate any **implementations**. I will migrate the implementations in
follow-up CLs before deleting the old list-returning `parse()` methods.

PiperOrigin-RevId: 565057945
2023-09-13 08:33:29 -07:00
..

ExoPlayer module

This module provides ExoPlayer, the Player implementation for local media playback on Android.

Getting the module

The easiest way to get the module is to add it as a gradle dependency:

implementation 'androidx.media3:media3-exoplayer:1.X.X'

where 1.X.X is the version, which must match the version of the other media modules being used.

Alternatively, you can clone this GitHub project and depend on the module locally. Instructions for doing this can be found in the top level README.