SDK / exoplayer

Common houses DataSource as an interface for reading data,
but most of the concrete implementations are in ExoPlayer.
This means that in practice, if an app wants to use a module
that reads using DataSource (e.g. extractor), they may be
forced to depend on ExoPlayer as well to get a concrete
implementation (e.g. FileDataSource). This change moves the
DataSource implementations into common to resolve this.

PiperOrigin-RevId: 403222081

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Users who need a (deprecated) SimpleExoPlayer instance should use
(the also deprecated) SimpleExoPlayer.Builder.

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Also fix a typo where windowIndex was being passed to Objects.hashCode
twice.

The old field is left deprecated for backwards compatibility. Usages
will be migrated in an upcoming change.

PiperOrigin-RevId: 403049260

Issue #9181
#minor-release

PiperOrigin-RevId: 403049218

An upcoming change will modify ExoPlayer.Builder#build() to return
ExoPlayer, so any places that explicitly need a SimpleExoPlayer
instance should be using SimpleExoPlayer.Builder.

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SimpleExoPlayer is being deprecated in favour of ExoPlayer.

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As suggested in parent change, return a list of
`TrackType` instead of appending to it.

This has the slight disadvantage of iterating twice
over the (short) list, but clarifies the code.

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Update the UI module, the demos and most other users
to make use of the new player TracksInfo and track
selection override APIs.

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When ExtractorInput.getLength() returns a defined length, the
SubtitleExtractor will create a buffer of the same length, call
ExtractorInput.read() until it has read the input bytes, plus one more
time where ExtractorInput.read() returns RESULT_END_OF_INPUT. The last
call to ExtractorInput.read() however will make the SubtitleExtractor to
increase its buffer (including a copy) unnecessarily.

This change makes the SubtitleExtractor avoid calling
ExtractorInput.read() if the expected number of bytes have already
been read, so that the internal buffer does not grow.

PiperOrigin-RevId: 402583610

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Enable subtitle output in the PlaybackOutput and disable the text
renderer in the MkvPlaybackTest. Add WebvttPlaybackTest to test the
output of side-loaded WebVTT subtitles.

PiperOrigin-RevId: 402526588

Before this change, the SubtitleExtractor did not mark the limit
of the input buffer, thus the SubtitleDecoder attempted to decode
more bytes. If the subtitle file had a new line at the end, this
bug would make the SubtitleDecoder append an line break after the
last subtitle.

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We no longer need separate methods to build Player and ExoPlayer.

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