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Add a release note about WebView-based subtitle output

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Also re-word some existing subtitle notes

PiperOrigin-RevId: 326989276
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ibaker 2020-08-17 11:25:45 +01:00 committed by kim-vde
parent f0ae8afd80
commit 5950557086
1 changed files with 14 additions and 9 deletions
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RELEASENOTES.md
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@ -133,6 +133,10 @@
of application-level audio speed adjustment
([#7502](https://github.com/google/ExoPlayer/issues/7502)).
* Text:
* Add a WebView-based output option to `SubtitleView`. This can display
some features not supported by the existing Canvas-based output such as
vertical text and rubies. It can be enabled by calling
`SubtitleView#setViewType(VIEW_TYPE_WEB)`.
* Recreate the decoder when handling and swallowing decode errors in
`TextRenderer`. This fixes a case where playback would never end when
playing content with malformed subtitles
@ -140,9 +144,10 @@
* Only apply `CaptionManager` font scaling in
`SubtitleView.setUserDefaultTextSize` if the `CaptionManager` is
enabled.
* Improve positioning of vertical cues being rendered horizontally.
* Improve positioning of vertical cues when rendered horizontally.
* Redefine `Cue.lineType=LINE_TYPE_NUMBER` in terms of aligning the cue
text lines to grid of viewport lines, and ignore `Cue.lineAnchor`.
text lines to grid of viewport lines. Only consider `Cue.lineAnchor`
when `Cue.lineType=LINE_TYPE_FRACTION`.
* WebVTT
* Add support for default
[text](https://www.w3.org/TR/webvtt1/#default-text-color) and
@ -156,12 +161,12 @@
* Stop parsing unsupported CSS properties. The spec provides an
[exhaustive list](https://www.w3.org/TR/webvtt1/#the-cue-pseudo-element)
of which properties are supported.
* Add support for the `ruby-position` CSS property.
* Parse `text-combine-upright` CSS property (i.e., tate-chu-yoko).
* Parse `<ruby>` and `<rt>` tags.
* Parse the `ruby-position` CSS property.
* Parse the `text-combine-upright` CSS property (i.e., tate-chu-yoko).
* Parse the `<ruby>` and `<rt>` tags.
* TTML
* Parse `tts:combineText` property (i.e., tate-chu-yoko).
* Parse `tts:ruby` and `tts:rubyPosition` properties.
* Parse the `tts:combineText` property (i.e., tate-chu-yoko).
* Parse t`tts:ruby` and `tts:rubyPosition` properties.
* CEA-608
* Implement timing-out of stuck captions, as permitted by
ANSI/CTA-608-E R-2014 Annex C.9. The default timeout is set to 16
@ -191,8 +196,8 @@
* Respect 33-bit PTS wrapping when applying `X-TIMESTAMP-MAP` to WebVTT
timestamps ([#7464](https://github.com/google/ExoPlayer/issues/7464)).
* Extractors:
* Optimize the `Extractor` sniffing order to reduce start-up latency
in `DefaultExtractorsFactory` and `DefaultHlsExtractorsFactory`
* Optimize the `Extractor` sniffing order to reduce start-up latency in
`DefaultExtractorsFactory` and `DefaultHlsExtractorsFactory`
([#6410](https://github.com/google/ExoPlayer/issues/6410)).
* Use filename extensions and response header MIME types to further
optimize `Extractor` sniffing order on a per-media basis.