SDK / exoplayer

- Use ConstantBitrateSeeker to implement seeking for ADTS format. Since most
ADTS streams are VBR, we use the average bitrate of the first 1000 frames as
the average bit rate.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207509651

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207278934

Currently, MetadataRetrieverImpl uses MediaCodecVideoRenderer to renderering
frames to capture. It suffers from 2 issues:
- MediaCodecVideoRenderer has a lot of logic to time frame release, including
drop frames if late or try to keep up with feeding speed etc... These are not
necessary at all for frame retrieval.
- MediaCodecVideoRenderer always tries to render 1 frame after video surface
update. This may some times lead to the wrong image being rendered for
MetadataRetriever.
This CL replaces this with a custom video renderer, that does not time frame
releases, and only render first frame after position reset / renderer
re-enabling.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207276937

Add a demo app that shows case how to use APIs from MetadataRetriever to
retriever track groups and frames from some media.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207269221

See https://support.google.com/accessibility/android/answer/7661305.

Also fix/suppress nullability warnings.

Issue: #4611

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207245115

The error is spurious, and is due to an incorrect annotation in
the framework.

[Internal: b/32137960]

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207234603

For background on why doing this works, see below. I don't want to change
how we get our Cipher instance in non-test code, since PKCS7 always works
on Android. It's only when the tests are running on a non-Android host
machine that they can fail. An alternative would be to make it an androidTest,
but androidTests are slow.

------

Background:

"While Java considers PKCS5 and PKCS7 padding to be the "same" (and
one should always use the string "AES/CBC/PKCS5Padding" because
"AES/CBC/PKCS7Padding" will cause NoSuchAlgorithmException to be thrown
when initializing an AES block cipher using the Java crypto API), I
consider this a gross misnaming in the Java platform because the pure
technical definitions of these paddings are not the same."

Ref: https://stackoverflow.com/questions/10193567/java-security-nosuchalgorithmexceptioncannot-find-any-provider-supporting-aes-e

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207234518

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207124509

Issue:#4555

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207096569

[third_party] Avoid saving Robolectric shadow instances; instead, save the real framework object, and get its shadow when needed using Shadows.shadowOf(). Call Android framework methods directly on the framework object instead of its shadow whenever possible.

LSC: []
Additional details: []

Cleanup change automatically generated by javacflume/refactory
Refactoring: //third_party/java_src/robolectric/errorprone:ShadowUsageCheck

Tested:
    TAP --sample for global presubmit queue
    []

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=207014379

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206963956

Issue:#2844
Issue:#3370
Issue:#2981

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206927295

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206921981

Amazon like to use Device.MODEL, so key on that instead for
these workarounds.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206917935

When user seeks to an unprepared period, since there is no period being played, currently the track groups and track selections are still the ones from previous period. This CL changes it so that when such seeking happens, PlaybackInfo's track groups and track selections are changed to empty.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206916109

Issue: #4593

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206911927

This is needed for implementing (optional) support for audio focus handling in a
later change.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206899837

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206893078

This CL adds support for seeking within PS streams by using binary search. For
any seek timestamp, it tries to find the location in the stream where SCR
timestamp is close to the target timestamp, and return this position as the
seek position.

Github: #4476.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206787691

Currently, we have KeyStatus, KeyRequest and ProvisionRequest as interface, so we can use
custom implementation for purpose such as wrapping native objects. However, these interfaces and the corresponding default classes are only used to bundle data, and in all existing implementation (including native code), it's just as efficient to just use the Java default implementation. Therefore we can just get rid of the interfaces, and change
the interfaces into classes with the default implementation.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206765389

There is some risk associated with this change, as audio track buffers come from
shared memory and limits may be device-specific. I've tested these sizes on
Nvidia Shield TV and Nexus Player on various builds. The maximum size allocated
is about 800 KB. We could implement support for retrying creating the audio
track if it fails to initialize, but it seems preferable to avoid the extra
complexity required to do that unless we know it's necessary to work around
device-specific limitations.

Issue: #3803

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206749222

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206747144

Issue:#4573

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206737252

The platform fix was merged into O MR1, not O. Nexus Player has
not received this build.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206734342

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206725219

Add TeeAudioProcessor that doesn't modify the input audio but writes it to an
AudioBufferSink, and WavFileAudioBufferSink for writing audio to a .wav file.

This is intended to be used for diagnostics and debugging.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206717458

MatroskaExtractor was checking for INDEX_UNSET as the sample count for buffers
not containing syncframes, but actually 0 was returned for these. Theoretically
this could prevent us starting to play a TrueHD stream as we wait until we can
read the sample count from a syncframe before accepting the audio in
DefaultAudioSink, but it seems that rechunking avoided this issue arising in
practice.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206575462

The looping media source doesn't convert the media period id to the externally
visible media period id. And the merging media source reports media period
creations multiple times which will break listeners assuming a media period
with a specific id will only be created once.

Also amend the doc for MediaSource.createPeriod to reflect that media periods
created in parallel do not actually have the same id.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206327241

Period transitions with non-zero start position happen too early as the
playing period is advanced as soon as the renderer offset is reached not
taking into account that the start position needs to be added to that.

Issue:#4583

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206310328

Issue: #4591

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206307948

AudioTrack checks the channel configuration against a mask of allowed channels.
Before Android M the check in getMinBufferSize would always fail for 8 channel
output.

For Android L constants are available to build the required channel
configuration for a conventional 7.1 setup and these constants are part of the
allowed channels mask, so switch to using them.

Before Android L the constants for 7.1 aren't in the allowed channels mask, so
discard channels to give a 5.1 stream.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206307892

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206304655

Remove minLoadableRetryCount from HLS components in favor of
LoadErrorHandlingPolicy#getMinimumLoadableRetryCount.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206298419

If compiled with eac3, audio/eac3-joc stream 5.1 bed-channels
can be decoded. The stream will be decoded as 2-D rather than
3-D.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206296930

The new method allows to add TransferListeners after the DataSource
has been created. Most implementations just forward to their wrapped
upstream DataSource. Implementation which directly read data implement
BaseDataSource instead.

Also removes the temporary default no-op implementation in DataSource.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206289986

This helps to distinguish between the MediaPeriodId the deferred media period is being
created with and the MediaPeriodId which is used to create the actual underlying period.

This serves two purposes:
1. The error reporting of ad prepare errors uses the correct media period id (the
   externally visible ad media period id).
2. The transition to using media period uid instead of indices is simplified.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206160463

Using our own no-op castNonNull prevents linking into checkerframeworks library.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206152148

Inner classes generally has generic names and they make sense when they
are considered with the top level class they appear in.

When this setting is disabled, Android Studio inserts import for the top
level class and append the top level class's name before the reference
to the inner class name.

NO_SQ

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206127763

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=206119357