SDK / exoplayer

Remove MPEG TS stream filtering based on AudioCapabilities.

Pass AudioCapabilities to MediaCodecAudioTrackRenderer so it can choose between
passthrough/raw and decoding for AC-3 tracks.

- Generalize rendererEnabledFlags to be selected track indices through
  ExoPlayerImpl/ExoPlayerImplInternal.
- Selecting an out-of-bound track index (e.g. -1) is equivalent to
  disabling a renderer prior to the generalization.
- A prepared TrackRenderer that exposes 0 tracks is equivalent to a
  TrackRenderer in the STATE_IGNORE state prior to the generalization.

Issue #514.

This will allow multi-track support when consuming from a SampleSource to
be added in a single class, rather than in 6. Prep for Issue #514.

On NVIDIA Shield, recreated passthrough AudioTracks have incorrect playback head
positions, due to shared state with the previously destroyed passthrough
AudioTrack. Calling AudioTrack.flush() before AudioTrack.release() ensures this
state is cleared.

This is a safe change so I have not made it a device-specific workaround. The
combined time for flush and release is less than 10 ms (with flush normally
taking less than two ms).

- Also avoid boxing when passing the seek position to the background
  thread.

Issue: #654

Fix crash on screen touch before starting playback. mediaController cannot be
used until after setMediaPlayer has been called on it.

See H.265/HEVC specification subsection 7.3.4.

Issue #464
Issue #665

Issue: #672

Everything I've seen that uses ExoPlayer sets it to true, and
setting it to false is poorly supported / likely to result in
bad initial A/V sync after each seek.

Issue: #662

Issue: #587

- Make Mp4Extractor more robust when resuming from read failures.
- Made FragmentedMp4Extractor handle atoms with extended sizes.

Issue #652

Both FragmentedMp4Extractor and WebmExtractor now invoke seekMap() with
SeekMap.UNSEEKABLE if there isn't an index in the stream, so DASH playbacks
will end up printing this warning every 5 seconds or so. This is obviously
not desirable, so this CL just removes the warning! The alternative would
have been to print a warning if the value is anything other than UNSEEKABLE,
but it doesn't really seem worth it.

Issue: #651

This is useful to allow playback of individual segments from a
DASH stream as regular fmp4 files. These segments don't typically
contain a segment index. For playback to start, we need to invoke
seekMap with the UNSEEKABLE index. We do this if we haven't seen
a segment index when we encounter an mdat box (if one were present,
it would have been located earlier than this point).

If the manifest server response arrived after the player was released, the
renderer builder would set up renderers for a released player, causing an
exception to the thrown in the DASH case.

Also fix Issue #657

Issue: #641

Issue #641

1. [Cleanup] Remove unused Track types, including TYPE_TIME_CODE.
2. Add subtitle track type, which is different to the existing text type.
3. Set duration on the media formats for text and subtitle tracks. This
   was causing the player to report unknown media duration for mp4 files
   containing such tracks.
4. Make TextTrackRenderer do the right thing when not started.

Issue: #635

- Make UnrecognizedInputFormatException public so the app can more easily handle
  it when it is propagated to onPlayerError.
- Format the description using the simple class names for the extractors.
- Don't retry loading after it's thrown, but just throw immediately.

Issue: #641

Add support for HEVC video in Matroska files

add support s263

- ExtractorSampleSource takes an array of extractors to test for suitability.
- Extractors now implement a sniff() method that returns whether they can
  extract samples in the input stream's format.
- Switch demo app samples to use format detection.

Issue: #438