SDK / exoplayer

If IMA loads an empty VAST document for an ad group it notifies via a LOG
AdEvent. Handle the event by updating the AdPlaybackState accordingly.

The error state will be handled in ExoPlayerImplInternal in a separate change.

Issue: #3584

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184516585

Resolve the media period for ad playback when resolving a subsequent period and
when receiving a timeline where the playing period in range (but wasn't before).

Fix the seek position calculation when a current ad must be skipped and is
followed by another ad.

Check MediaPeriodInfos match when checking MediaPeriodHolders, to handle cases
where a future ad should no longer be played. This may involve playing two
content media periods consecutively.

Issue: #3584

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184514558

DefaultExtractorInput.SCRATCH_SPACE buffer is used to skip data by
reading it into this buffer and discarding.

Simultaneous use of skip methods corrupts this buffer. Normally the
read data is discarded so it doesn't matter but the underlying
DataSource may use the buffer too. If it's a CacheDataSource it uses
this buffer to read data from upstream then write to cache.

Issue: #3762

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184502170

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184501752

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184317120

This avoids reading a format that is not equal because of switching between
NO_VALUE and 0.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184298076

This makes assertion errors in code running on the Looper less easy to miss.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184294290

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184274139

This should be a no-op change.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184150266

For below API level 16, the logic copied from ConnectivityManagerCompat.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184131406

Only filter HlsMasterPlaylists.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183394956

Helper class to create notifications for downloads using DownloadManager.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183225948

Issue: #2643

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184844484

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184125114

Even if a developer synchronizes every method, thread safety is still not guaranteed
because the internal callback methods can't be synced from outside.

Issue:#3773

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184122072

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184122057

1. Add string for STATE_CANCELED. Lint doesn't like that the
   switch statement on the state IntDef doesn't have a case
   for STATE_CANCELED. May as well add one, even if we're not
   planning on our demo app showing notifications for this
   state.
2. Replace non-human-readable error message with one provided
   by ErrorMessageProvider.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184120892

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184120873

In the case of the components we deliberately access via
reflection, it's normal that they might not be resolved
due to proguarding (i.e. if the app isn't being built to
include them). Don't note their omission.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184120611

The pending exception will be thrown upon returning to Java
from native, but we should return early rather than continuing
to execute the native method to the end so as to avoid undefined
behavior. Note that the return value is irrelevant (because the
pending exception will be thrown).

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184119606

Lint recommends switching to SparseArray<X> instead.
This is done for the DASH case. For the Cast case it's
easier to use a switch statement.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184119312

Note this case is special in that JUnit is an actual
compile dependency, as opposed to a testCompile or
androidTestCompile dependency.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184119235

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184119097

I think (?) they're harmless, but lint doesn't like them.
Using them within the class body means the TargetApi
annotation applies, which makes lint happy.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184117951

In MediaCodecRenderer, we currently uses codec.getInput/OutputBuffers event
though these APIs are deprecated and are not recommended from API 21+. This
change makes sure that:
- On API 20 and below, we will keep using codec.getInput/OutputBuffers.
- On API 21+, we will use getInput/OutputBuffer(index) APIs instead.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184112329

*** Reason for rollback ***

Broke everything

*** Original change description ***

Clean up message naming in EPII

***

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184061352

This applies when PlayerControlView is used as a standalone
component (not inside PlayerView). Previously hideAtMs was
set to 0, which caused the view to be immediatley hidden in
onAttachedToWindow. After this change the first time the view
is attached to the window is effectively treated as a "user
interaction" for the purposes of deciding when to timeout.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184056324

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184056034

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=184022988

This make sure all media sources can be reprepared after being released.

Issue:#3498

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183990416

When the dynamic media source contains multiple empty timelines in a row and some
of them dynamically change to a non-empty timeline, the window and period indices
are not updated correctly because the index of the changed child source is wrong.

To fix this bug, the child index is added to the media period holder to have direct
access on the current child index to prevent ambiguity.

Furthermore, the uid is changed to be the hash code of the MediaSourceHolder not the
MediaSource itself to allow adding the same MediaSource twice without violating the
unique uid policy.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183973462

Simplifies the app and prevents inconsistent states between
both players and the media queue.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183831329

Also fixes a bug where deferred media periods were kept in the list for
an unprepared media source although the media period was already released.

Issue:#3498

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183800889

This enables caching manifest files for DASH, HLS and SmoothStreaming.

To disable caching a non cache DataSource should be provided for reading
manifest to the used MediaSource.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183794252

In startReadWrite*() methods a new CachedContent is created if the there
isn't one already for the given key. If the span is release without
writing any content, this fix removes the added CachedContent.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183666821

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183656655

Before this change, the ad playback state stored the number of played ads in
each ad group. There was no way to represent that an ad had failed to load (and
it wouldn't be possible just to increment the played ad count to signal a load
error because there might be an unplayed ad before the ad that failed to load).

Represent the state of each ad (unavailable, available, skipped, played, error)
in each ad group. In a later change the player will use this information to
update its loaded MediaPeriods in response to future ads failing to load.

Also make the AdPlaybackState immutable and remove copying/duplication of its
fields in the ad timeline and period.

Issue: #3584

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183655308

For our strings to be translated, we're required to provide
added context in the form of a description, and specify a
maximum length for the translated strings.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183651515

Issue:#3498

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183648419

1. When we try and load something via reflection and find the
   class, always throw rather than failing silently if we
   subsequently fail to instantiate an instance. This is
   indicative of a broken proguard setup, and failing silently
   makes it hard to spot.
2. Add library/core proguard configuration to ensure extension
   renderer constructors that we access via reflection are kept.
3. Add demos/main proguard configuration to ensure ImaAdsLoader
   constructor that we access via reflection is kept.
4. Added IMA proguard file to hopefully fix #3723, although I
   wasn't actually able to reproduce the issue.

Issue: #3723

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183648187