SDK / exoplayer

When the primary url is blacklisted (due to a 404, for example) or
the selected variant is different from primary url, allow the tracker
to change the url.

Issue:#87

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141291435

Pending improvement:

* Peek just the required priv frame. Avoid decoding all id3 information.
* Sniff the used container format instead of using the extension.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141181781

Issue: #2162

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141177715

The definition of negative line indices was intentionally shifted
by one because the way VTT defines them doesn't appear to allow for
cues to be positioned at the very bottom of the screen in the case
that ANCHOR_TYPE_END is used.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141168028

This is a first step toward supporting tunneled playback

Issue: #1688

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141167501

- Fix bug where we'd try and call replaceStream having already
  notified the renderer that the current stream is final. This
  could occur if a period was added to the end of the playlist.
- If the current period being played is removed and a new period
  to play cannot be resolved, assume we've gone off the end of
  the playlist and transition to the ended state. This allows
  the current source to be re-used (unlike the previous behavior
  of considering it an error). Treat valid seeks that cannot be
  resolved due to concurrent timeline update similarly.
- Add seek sanity check back to ExoPlayerImpl. Meh. It's probably
  best to keep this, since it stops the exposed window index
  being invalid w.r.t the exposed timeline.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141167151

Issue: #2152

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141159330

- Infer likely left/center/right alignment for pop-on captions.
  This makes the rendering much better in practice, particularly
  when the captions were intended to be center aligned.
- Fix line anchoring.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141156222

CEA-608 specifies a "safe-area" in which the captions should be rendered. This change adjusts all of the cue positions so they are within that safe area. It also fixes a minor issue in which roll up captions would drift towards the last row if a preamble address code had the "next row toggle" bit set.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141077433

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141073182

Seeks are permitted when there's no timeline, and in this
case playback necessarily fails on the playback thread when
the timeline becomes known. Pushing failure to the same
place when the timeline is known means there's only one
failure path for this case. A later CL will likely introduce
an InvalidSeekPositionException for this case.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141037708

Issue #2146

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141036866

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=141031900

Issue: #2145

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140868079

This is implemented in the same way as in MediaCodecRenderer.

Move codec != null guard into feedInputBuffer to handle the case of an input
format change with no dequeued buffers where the codec can't be reinitialized
immediately.

Issue: #2111

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140864942

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140847027

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140843106

These additions are useful for sources that need to track the playback position
and control playback.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140828310

add mp2 audio

Merge branch 'dev-v2_subtitles_view' of git://github.com/drhill/ExoPlayer into drhill-dev-v2_subtitles_view

Merge branch 'eia-608-improvements' of git://github.com/RikHeijdens/ExoPlayer into RikHeijdens-eia-608-improvements

Added FLV PCM law support

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140720011

Prevented readFile() setting "changed" boolean to true every time. It's set only if encryption key is set but the index file isn't encrypted.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140714173