This is a no-op change for clarity only. maxWidth/maxHeight
don't mean anything for AAC/MP3, so it makes sense to pass
MediaFormat.NO_VALUE in all cases.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=111619832
Moved the behaviors related to Cue's to the WebvttCueParser class.
This way, the parsing methods will be more easily accessible to
other classes, such as the MP4Webvtt parser. This class also has
some methods that require state to avoid repetitive avoidable
allocations. The method visibility is subject to changes in
further CLs.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=111616824
This is the main component required to enable WebVTT subtitles in HLS.
It passes through each WebVTT file as a sample, and derives the correct,
adjusted timestamp for each of them on the way through.
Not yet wired up because we need to properly share the same
PtsTimestampAdjuster everywhere, and also stop instantiating new instances
of the adjuster. The adjuster will also need to correctly handle
discontinuities, since we'll no longer be creating new instances of it.
Issue: #151
- Propagate BehindLiveWindowException if we fall off the back
of an HLS live stream.
- Consolidate seekPositionUs and playbackPositionUs into a
single parameter.
Issue: #765
- NAME is optionial now in the Hls Manifest
- Use the id field in Format to store the NAME instead of
a field in Variant to mimic DASH's behaviour
(see the DASH Id PR, which is not merged yet at this time).
When switching format in HLS, we instantiate a new extractor, which
adjusts TS presentation timestamps so that they align properly with
the start of the first segment in the new format. Some HLS streams
appear to have slightly misalignment that causes a glitch when using
this approach.
It's better to re-use the same timestamp adjustment across formats,
and only reset it when seeking or when there's an actual discontinuity.
This is because the HLS spec guarantees PTS timestamp alignment across
different formats.
We'll also need something like PtsTimestampAdjuster to share between
separated audio and WebVTT tracks, which also contain PTS timestamps
that are aligned, and will need to share a common adjustment.
Issue: #692
When a live stream ends, what typically happens is that the manifest
is refreshed and the refreshed version is not marked as live/dynamic.
When this happens we:
1. Don't want the duration of the track to change.
2. Still want to consider the possibility that we may have fallen behind
the live window.
3. Don't want to allow futher manifest refreshes.
This change uses the right thing in the right place.
- Remove unused method in DashChunkSource.
- Remove inputEncoding parameter for subtitle parsers. We're
ignoring it in all but one of the parsers, and for the one
that does use it, it'll only ever receive null, since that's
all we're passing.
- Make TextTrackRenderer advance to the next subtitle even if
the current one hasn't finished, in the case that they overlap.
This shouldn't ever really happen, but it seems best to trust
the start time of the new sample rather than the last event
time of the previous one.
- Video track is always marked as adaptive, the resolution is
stripped out (since it's otherwise just set to whatever the
resolution of the first selected variant is), and the max
dimensions are set.
Issue #514
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.
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.
Prior to this change, there was a bug where playback would
fail with the following steps:
1. Start playback.
2. Pause playback.
3. Disable all renderers.
4. Enable at least one renderer.
5. Resume playback.
