SDK / exoplayer

See https://checkerframework.org/manual/#type-refinement-purity.

PiperOrigin-RevId: 344994705

Previously `MediaPeriodQueue` would return null if an ad media URI hadn't
loaded yet, but this meant that the player could be stuck in `STATE_READY` if
an `AdsLoader` unexpectedly didn't provide an ad URI. Fix this behavior by
masking ad media periods. `MaskingMediaPeriod` no longer requires a
`MediaSource` to instantiate it.

This also fixes a specific case where playback gets stuck when using the IMA
extension with an empty ad where the IMA SDK unexpectedly doesn't notify the ad
group fetch error.

Issue: #8205
PiperOrigin-RevId: 344984824

This is to ensure we can still discard the data if needed.

Issue: #5011
PiperOrigin-RevId: 344977548

#exofixit

PiperOrigin-RevId: 344845328

PiperOrigin-RevId: 344838400

This change avoids an early fatal exception for replaced hinted parts.

Issue: #5011
PiperOrigin-RevId: 344828076

PiperOrigin-RevId: 344801462

This is needed to support old binary builds that still rely on the
existance of this class.

PiperOrigin-RevId: 344799495

PiperOrigin-RevId: 344787160

Broken in https://github.com/google/ExoPlayer/commit/bf21e3c690cfbab6cdbb76b3dd6e353f7221b3f1.

PiperOrigin-RevId: 344777455

The inner class was only used to obtain 3 distinct pieces of
information which is better handled by static methods.

#exofixit

PiperOrigin-RevId: 344767661

#player-to-common

PiperOrigin-RevId: 344558028

PiperOrigin-RevId: 344535069

PiperOrigin-RevId: 344526343

As opposed to in-source git-clone.

PiperOrigin-RevId: 344525899

#exofixit

PiperOrigin-RevId: 344517105

#exofixit

PiperOrigin-RevId: 344516187

This copy will be removed once Player is migrated to
common.

#exo-offload

PiperOrigin-RevId: 344515979

This method should be assumed to clear the data of the underlying array
(it will do this if the new limit > data.length).

This means it should only be called (directly) before writing into the
backing array.

It shouldn't be used as a shorthand for position=0, limit=x - those
should be two explicit method calls.

Most of these changes are no-ops, but they make the code more correct.

The TS SectionReader can't be easily changed to be 'safe', because it
relies on sectionData maintaining state between iterations of the while
loop. Instead I've added comments justifying the existing code.

PiperOrigin-RevId: 344515340

The workaround to post a message was needed to ensure we
receive any final onIsPlayingChanged event before the test
is finished (to record the correct playing time).

Using onEvents allows us to do this synchronously as the
callback guarantees that there is no other pending event.

#exofixit

PiperOrigin-RevId: 344436180

#exofixit

PiperOrigin-RevId: 344428571

This ensures we have full test coverage for proguard configs now.
The only configs not covered by tests are:
 - IMA and OkHttp which copy recommended configs from the respective
   library. I couldn't reproduce failures by removing them (and thus
   couldn't write a test that ensures they are correct).
 - Some dontwarn lines that just suppress warnings.

In addition, this change fixes a couple of related issues:
 - Moved AV1 proguard config to correct module.
 - Removed mentioning of deprecated ExtractorMediaSource from README
 - Suppressed warning from IMA code that prevent proguarding under
   strict rules
 - Fixed wrong proguard exclusion in VP9 module.
 - Moved FLAC exclusion (DefaultExtractorsFactory) to correct module.
 - Added AlertDialog suppression for de-jetified code.
 - Removed unusued dependency from UI module that causes large APK
   size increase.

#exofixit
#minor-release

PiperOrigin-RevId: 344427532

- Retire YouTube streams. They're flaky (e.g., one of them has transformed into
  an audio only stream!). There is also a desire for us to stop relying on special
  non-expiring YouTube URLs.
- Reorganize the remaining streams.

PiperOrigin-RevId: 344421031

PiperOrigin-RevId: 344420436

Previously the PlaybackStatsListener needed to handle all events
individually, which required to keep some state of the player and
to resolve potentially transient state changes.

Using onEvents allows to channel all simultanous updates through
one method so that no transient player state and other
inconsistencies need to be handled. This makes the logic easier
to read.

In addition it also allows to resolve all simultaneous events to
use one EventTime (with one timestamp).

#exofixit

PiperOrigin-RevId: 344415459

#exofixit

PiperOrigin-RevId: 344414313

Instead of ffmpeg_jni for consistency with other extensions.

PiperOrigin-RevId: 344411014

PiperOrigin-RevId: 344408351

PiperOrigin-RevId: 344384426

PiperOrigin-RevId: 344310640

PiperOrigin-RevId: 344309747

Also make compilation automatically determine the number of
threads to use during compilation.

PiperOrigin-RevId: 344264761

#exofixit

PiperOrigin-RevId: 344246408

PiperOrigin-RevId: 344243929

This is simpler than instantiating a single-element string array for
every parameter.

#exofixit

PiperOrigin-RevId: 344237475

#exofixit

PiperOrigin-RevId: 344232362

Issue: #8239

#exofixit
#minor-release

PiperOrigin-RevId: 344211877

In many cases it doesn't matter for the test itself how many windows
a timeline has, or even how the timeline of a MediaSource looks like.

And since we introduced the MediaItem-based APIs, single-window
Timelines are the only fully supported Timelines. Thus there is no
point in specifiying this explicitly.

Using these assumptions, we can remove some boilerplate when setting
up standard FakeTimelines or FakeMediaSources with a standard
FakeTimeline.

#exofixit

PiperOrigin-RevId: 344210395

#exofixit
Issue: #5602
PiperOrigin-RevId: 344093622

The current code creates placeholder metadata elements if there is no
static metadata. This causes onStaticMetadataChanged callbacks even
if there is no metadata.

Instead, we can keep the empty list as the static metadata is already
documented to be an empty list if the metadata is unavailable.

#exofixit

PiperOrigin-RevId: 344071639