SDK / exoplayer

One issue with the previous implementation was that
isUnsynchronized would not be set back to false if
previously set to true and if the next header has
majorVersion >= 4. In general, having the decoder be
stateless is clearer (and thread safe, albeit that
this property is not required).

Update dev-v2-id3 with dev-v2

Issue: #1907

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135798950

- Fix issue in ExoPlayerImpl where the timeline was null'd
  but onTimelineChanged was not fired.
- Add the ability to not reset the timeline. This is useful
  for retries where you know the timeline will be the same
  as it was previously.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135797577

playingPeriodHolder can be null in the case that the first
period is still being prepared. We need to make sure we
release the period that's being prepared in such cases,
which is loadingPeriodHolder.

Issue: #1914

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135793472

- Move nearly all logic onto the calling thread (i.e. the thread
  calling open/read/close), to make threading correctness more
  obvious.
- Document which variables are read/written from which thread, and
  why the call sequences are safe.
- Fix thread safety issue that I think could probably cause data
  corruption in the case of a read timeout followed by another
  request into the DataSource.

Also:

- Relaxed content length checking to be consistent with the other
  http DataSource implementations, and avoided parsing the headers
  where they're not used.
- Fixed missing generics in CronetDataSourceFactory.
- Added TODO to work with servers that don't support partial range
  requests.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135702217

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135700280

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135692709

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135682130

- Make sure no events are posted on PlaybackControlView
  if it's not attached to a window. This can cause leaks.
  The target hide time is recorded if necessary and
  processed when the view is re-attached.
- Deduplicated PlaybackControlView.VisibilityListener
  invocations.
- Fixed timeouts to be more intuitive (I think).
- Fixed initial visibility of PlaybackControlView when
  used as part of SimpleExoPlayerView.
- Made some more attributes configurable from layout xml.

Issue: #1908
Issue: #1919
Issue: #1923

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135679988

This is a minor cleanup. The main thing it fixes is that
the "Inconsistent headers" and "Unexpected Content-Range"
log messages were printing List<String> objects, rather
than the actual headers they are supposed to print.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135378074

The access in fillCurrentRequestPostBody wasn't protected with
synchronization. Furthermore, just synchronizing it wouldn't be
sufficient, since what we really need to check is whether the
Content-Type header has been added to the UrlRequest.Builder.
The contents of requestProperties may have changed between the
headers being added to UrlRequest.Builder and the call to
fillCurrentRequestPostBody.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135376904

- Allow null Content-Type in response headers.
- Inline validateResponse, just because it makes it clearer
  what thread it's being executed on when inlined.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135375063

- Fix bug in getCurrentRequestStatus where we weren't
  blocking on the condition variable.
- Make methods static where possible.
- Clean up getUri implementation.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135373586

This change is a no-op reodering, as a precursor to
further cleanup. The public methods are grouped by
the class/interface they implement. The private methods
are ordered with things that will become static in
a subsequent change at the bottom.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135372629

- Lots of misc cleanup
- Remove GaplessInfo from Metadata. IMO it doesn't quite belong there,
  and means it ends up being represented twice inside Format.
- Note: Changes untested, but will be tested in due course!

Merge branch 'albumMetadataV2.1' of git://github.com/cbfiddle/ExoPlayer into cbfiddle-albumMetadataV2.1

Use Call.Factory instead of OkHttpClient

This allows using alternate implementation of an HTTP client. We can use
OkHttpClient as before as it implements Call.Factory.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135353593

Without this developers which reuse a SurfaceHolder with multiple instances of
SimpleExoPlayer need to call simpleExoPlayer.setVideoSurfaceHolder(null) to get
the SimpleExoPlayer.ComponentListener removed from the surface holder. If they
don't, the component listener is still registered and as a member class leaks
an instance of simpleExoPlayer.

Issue #1855

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135292439

Playback would fail if a renderer is toggled from consuming from
one child to another in a single step.

Issue: #1900

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135270356

https://github.com/google/ExoPlayer/issues/1827

Three different modes available: fit (default), fixed_width, fixed_height
Developers need to use wrap_content for the dimension which is not fixed:

app:resize_mode="fixed_width"
android:layout_width="320dp"
android:layout_height="wrap_content"

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135264861

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135260806

Configuration of retry currently fails if all of the
following are true, which is highly unlikely but does
occur in the ref'd issue.

1. Loading/extraction fails
2. Neither length of stream of a seek map is known
3. At least one track has been output by the extractor

Issue: #1899

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135228687

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135215320

Issue: #1895

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135211179

Ref: https://blog.bintray.com/2015/02/09/android-studio-migration-from-maven-central-to-jcenter/

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135211072

- Enfroce read returns 0 if readLength==0 everywhere.
- Fixes and simplifications for CronetDataSource.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135138232

- Make read return 0 if readLength==0
- Return RESULT_END_OF_INPUT properly in the case that
  bytesRemaining is unset (this was broken previously,
  but only applies for assets > 2^31 bytes, so it's
  unlikely anyone ever hit this issue)

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135136541

It'll be a TODO to clean up some of the commonality between
publishing this and the core library (e.g. the version number
should really be spec'd in one place only). Just getting this
submitted for now so that we don't lose track of how I created
https://bintray.com/google/exoplayer/extension-okhttp

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135102459

Issue:#1875

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135100986

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135100455

- Correctly null out streams[j] in the case that a renderer
  is being disabled.
- Read discontinuities from all children, not just enabled
  ones. This fixes a failure when reading a discontinuity
  with all renderers disabled.
- Add in some assertions to make incorrect stream selection
  failures obvious and immediate.
- Relocate subtitles so they're above the shutter (needed so
  they continue to be visible when video is disabled but
  text is still enabled).

Issue: #1854

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135089944