SDK / exoplayer

This will be needed when retaining a back-buffer. Being able to
query the first index allows us to work out when we've discarded
all samples that were obtained from a particular chunk, which
we'll use to determine when to remove chunks from
ChunkSampleStream.mediaChunks.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175172085

In the case converting cache files from an earlier version of
SimpleCache, there is no previous version of the index file. If the app
doesn't call any SimpleCache methods which would make the index file
stored before it exists whole data gets lost.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175153650

These callbacks are executed on the app thread after the corresponding
timeline update was triggered. This ensures that seek operations see the
updated timelines and are therefore valid, even if the seek is performed into a
window which didn't exist before.

GitHub:#3407

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175136187

When the renderer media clock source read its stream to end but is not ready,
this means one of two things. Either the next period is not prepared yet and
we need to stop the renderers and buffer until it's prepared, or we are
waiting for another track in the current period with a uneven (longer)
duration.

The second case was already covered by this if condition and uses the standalone
clock instead to continue.

The first case now also uses the standalone clock, but it doesn't make a
difference, because both clocks are stopped and still synchronized.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175134975

MPD file may include multiple EventStreams in its Periods, which contains Events
that the application may need to handle/respond to.
This change adds support for parsing the EventStream/Event nodes from MPD
file, and exposing these EventStreams as a metadata sample stream that application
can respond in a similar way to other metadata events.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175017697

Issue: #3441

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175011804

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175010595

Issue: #3138

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=175006223

This CL does not aim to introduce any functionality changes.

Issue:#3149

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174864875

Issue:#2748

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174854541

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174853112

GitHub: #1897

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174841175

Issue: #2795

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174836960

Removes duplicated code and starts cleaning up handling of media clocks.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174829840

Issue: #3384

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174715851

Issue: #3426

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174700804

Issue: #3257

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174686747

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174685374

This prevents users from having to check sideloaded subtitles URLs before
preparing a SingleSampleMediaSource with it.

Issue:#3140

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174475274

... by making it case insensitive and null-tolerant for schemeId (as was before
adding playlist drm data merging).

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174472123

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174467964

This is the first CL in a series to add chunkless preparation support.

Also did a bit a tidying up in HlsSampleStreamWrappen and
HlsMasterPlaylistParserTest.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174461737

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174460558

This also allows exposing multiple CC channels to any fMP4 extractor client.

Issue:#1661

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174458725

First fix, prevents forced rewriting when cipher is set but encrypt is
false.

Second, removes the store() call in SimpleCache.initialize() so
initialization doesn't fail because of CachedContentIndex write issues.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174450586

The mediaChunks.size() > 1 check was supposed to ensure this, and
did roughly the right thing when there was only a single stream
(although it was unnecessarily restrictive in preventing chunk
cancelation for the first chunk, where bytesLoaded != 0 and none
of the samples had been consumed).

Now we have multiple streams the check doesn't do the right thing,
and adding a back-buffer feature will make even more incorrect.
This change switches to checking the condition we actually want
to check directly :).

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174449398

*** Reason for rollback ***

Breaks setting PlaybackParameters before start of playback

*** Original change description ***

Add support for float output in DefaultAudioSink

Also switch from using MIME types to C.ENCODING_* encodings in DefaultAudioSink.

***

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174445506

Client can add this functionality by extending DownloadService.

Also made DownloadManager accept multiple listeners. So instead of
broadcast event, client can listen to DownloadManager directly.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174335820

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174327876

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174323423

Issue: #3366

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174214690

Issue: #3406

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174214296

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174185407

We need to make sure the original header is retained when we redirect.

I filed a request on Cronet to allow headers to be provided to the UrlRequest#followRedirect method:
https://bugs.chromium.org/p/chromium/issues/detail?id=779611

Until that API is changed, i.e., pulled into GMSCore, and most clients are using the version of GMSCore with the API change, we can stick with this approach.

FYI

Cronet generally uses the original headers on redirect:

http://[]

but modifies the headers for these special cases:

hhttp://[]

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174074572

Also fire onPositionDiscontinuity in this case

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174039483

Instead of using an Executor to run DownloadTasks creates and manages
threads internally.

Also added DownloadThread internal class to better separate the code
that doesn't run on the main thread.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174036872

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174030901

1. Move Timeline/Manifest into PlaybackInfo
2. Don't update externally visible Timeline/Manifest during preparation
3. Ignore MSG_POSITION_DISCONTINUITY during preparation
4. Correctly set masking variables at start of preparation, and use them

Once this change goes in, PlaybackInfo will contain timeline, manifest
and position, which should always be self-consistent with one another.
The next step would then be to move a bunch of logic in ExoPlayerImpl
that derives state from timeline and position into PlaybackInfo, and
split that into its own top level class that can be easily tested to make
sure it never IndexOutOfBounds.

I think we could also replace the masking variables and instead just assign
a new PlaybackInfo to the playbackInfo variable whenever we're doing
something that requires masking. This should be possible because we no
longer update playbackInfo whenever we have pending acks. It would
require allowing PlaybackInfo to mask the window position internally when
the timeline is empty, but I think this is ok, and again is something we
could test pretty easily.

Issue: #3362

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=173909791