SDK / exoplayer

TrackRenderer and SampleSourceTrackRenderer both now use a TrackStream
so they can be merged.

(This may also be useful for adding playlist support, in case TrackStreams need
to be replaced during playback.)
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119743228

This CL allows style blocks to reference elements. For example: we could style
a cue with text "Sometimes <b>bold</b> is not enough" with the style block
::cue(b) { ... }.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119734779

This is in preparation for the player knowing about the live
window, at which point only correct playback positions will be
passed into ChunkSource implementations. Note that both
implementations bound the chunk index within range in case of,
for example, off-by-one errors caused by very recent manifest
updates.

This will temporarily cause live playbacks to always start at
the beginning of the current live window (we'll be trying to
play from t=0, which will be adjusted to the start of the live
window as a result of the bounding).
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119733559

FrameworkSampleSource will still be useful for audio, where
sample interleaving isn't an issue. We could optionally add
a "don't wait for first frame" boolean to the video renderer
if we *really* need to keep some form of this workaround in
place, but I'd rather not do so for now.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119733224

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119732992

Also add jni/flac directory to .gitignore.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119730955

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119655941

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119643009

In CSS, ids are references using #. The absence of # references elements.

NOTE: If the id of a cue was "1", we support its reference with ::cue(#1).
In CSS, however, this is not valid, and the number should be escaped with
\3 as in ::cue(\31). We still do not use number escaping (and I doubt
whether we should at some point).
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119634708

This CL removes a warning by adding the import, and removes a qualified reference in the process.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119618343

This CL adds the support of CSS styling in Cues through id and "universal" cue selector.
The more sophisticated selectors will be left for later, because they requier a bit more
complex logic. Also narrowed a little bit the responsibilities of the WebvttCueParser to
move some to the WebvttParser.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119547731

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119544516

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119532634

Both of these features are being promoted to first class
citizens in V2 (multi-period support will be handled via
playlists, seeking-in-window will be handled by exposing
the window/timeline from the player and via the normal
seek API). For now, it's much easier to continue the
refactoring process with the features removed.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119518675

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119393264

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119211619

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119182077

Note that the DataSourceInputStream read methods
are implementing a different interface (InputStream,
not DataSource), which is why -1 is still used in
that case.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119180851

This method is needed by FlacExtractor to release native resources.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119143922

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119049397

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119020538

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118954433

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118925372

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118924198

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118921673

This replaces calls to unescape except for SEI unescaping.

Use the new ParsableNalUnitBitArray for reading the slice header in HLS
access unit detection and slice_type reading.

Unescape the SPS before parsing in FLV and MP4. Before this change it was
parsed in its original (escaped) form.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118777869

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118775995

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118775612

The only change that's not re-ordering is to add a Util method
for usToMs to replace the ones in the HLS and Chunk sources.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118775359

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118775144

This was made possible by the simplification of how DASH/SS
chunk replacement works. It is also a step towards eliminating
continueBuffering(), since continueBuffering() calls are no
longer relied upon to resume a backed off load.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118774865

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118774671

Step 6 of the refactor involves moving the logic that's
currently in the SourceBuilder classes in the demo app
into new SampleSource classes in the library. These classes
will construct video/audio/text pipelines on-demand (i.e.
when tracks are enabled) rather than constructing them all
up front as is currently the case in the SourceBuilder
classes. Hence we need a way to instantiate DataSource
instances (i.e. a DataSourceFactory ;)).
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118722180

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118579021

DASH + SS previously had a ridiculously complicated chunk
replacement mechanism in resumeFromBackOff. It also didn't
allow replacement of the first media chunk in the queue,
even though it's possible to remove it in the case that no
corresponding samples have been consumed.

This CL moves DASH + SS to the simpler model used in the
HLS implementation, where the chunk source has a single
opportunity to cancel (and hence later replace) the chunk
when the load error occurs. With this change comes the
ability to replace the first media chunk in the queue in
all cases where it's possible to do so.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118573418

This fixes some nuances with the initial solution. Mainly,
that the TrackStreams returned by selectTrack could not be
used safely until after endTrackSelection was invoked. It
also reduces the need for member variables to track state
between the track selection methods.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118556651

- Use FakeDataSource as the upstream source.
- Actually validate that caching is happening (i.e. reads happen
  on the upstream source only if the data hasn't been read through
  the CacheDataSource already).
- Move FakeClock to sit alongside the other Fake classes.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118555903

In V2 we'll at some point start using DataSource factories
for creating DataSource instances. If there are two DataSource
interfaces this gets unnecessarily awkward.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118470751

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118457489

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118455206