Add blog posts to release notes

PiperOrigin-RevId: 332940209

RELEASENOTES.md

@@ -12,19 +12,24 @@
 
 ### 2.12.0 (2020-09-11) ###
 
+To learn more about what's new in 2.12, read the corresponding
+[blog post](https://medium.com/google-exoplayer/exoplayer-2-12-whats-new-e43ef8ff72e7).
+
 *   Core library:
     *   `Player`:
         *   Add a top level playlist API based on a new `MediaItem` class
-            ([#6161](https://github.com/google/ExoPlayer/issues/6161)). The
-            new methods for playlist manipulation are `setMediaItem(s)`,
+            ([#6161](https://github.com/google/ExoPlayer/issues/6161)). The new
+            methods for playlist manipulation are `setMediaItem(s)`,
             `addMediaItem(s)`, `moveMediaItem(s)`, `removeMediaItem(s)` and
             `clearMediaItems`. The playlist can be queried using
             `getMediaItemCount` and `getMediaItemAt`. This API should be used
-            instead of `ConcatenatingMediaSource` in most cases.
-        *   Add `getCurrentMediaItem` for getting the currently playing item
-            in the playlist.
-        *   Add `EventListener.onMediaItemTransition` to report when
-            playback transitions from one item to another in the playlist.
+            instead of `ConcatenatingMediaSource` in most cases. Learn more by
+            reading
+            [this blog post](https://medium.com/google-exoplayer/a-top-level-playlist-api-for-exoplayer-abe0a24edb55).
+        *   Add `getCurrentMediaItem` for getting the currently playing item in
+            the playlist.
+        *   Add `EventListener.onMediaItemTransition` to report when playback
+            transitions from one item to another in the playlist.
         *   Add `play` and `pause` convenience methods. They are equivalent to
             `setPlayWhenReady(true)` and `setPlayWhenReady(false)` respectively.
         *   Add `getCurrentLiveOffset` for getting the offset of the current
@@ -33,6 +38,11 @@
             player.
         *   Add `AudioComponent.setAudioSessionId` to set the audio session ID.
             This method is also available on `SimpleExoPlayer`.
+        *   Remove `PlaybackParameters.skipSilence`, and replace it with
+            `AudioComponent.setSkipSilenceEnabled`. This method is also
+            available on `SimpleExoPlayer`. An
+            `AudioListener.onSkipSilenceEnabledChanged` callback is also
+            added.
         *   Add `TextComponent.getCurrentCues` to get the current cues. This
             method is also available on `SimpleExoPlayer`. The current cues are
             no longer automatically forwarded to a `TextOutput` when it's added
@@ -49,9 +59,6 @@
         *   Deprecate `EventListener.onSeekProcessed` because seek changes now
             happen instantly and listening to `onPositionDiscontinuity` is
             sufficient.
-        *   Split off `skipSilence' from `PlaybackParameter` and move it
-            to `AudioComponent.setSkipSilenceEnabled` with callback
-            `AudioListener.onSkipSilenceEnabledChanged`.
     *   `ExoPlayer`:
         *   Add `setMediaSource(s)` and `addMediaSource(s)` to `ExoPlayer`, for
             adding `MediaSource` instances directly to the playlist.
@@ -89,8 +96,8 @@
         ([#7309](https://github.com/google/ExoPlayer/issues/7309)).
         `LoadErrorHandlingPolicy` implementations should migrate to implementing
         the non-deprecated methods of the interface.
-    *   Add an option to `MergingMediaSource` to adjust the time offsets
-        between the merged sources
+    *   Add an option to `MergingMediaSource` to adjust the time offsets between
+        the merged sources
         ([#6103](https://github.com/google/ExoPlayer/issues/6103)).
     *   Move `MediaSourceEventListener.LoadEventInfo` and
         `MediaSourceEventListener.MediaLoadData` to be top-level classes in
@@ -100,11 +107,10 @@
         generalize them to work with `Decoder` rather than `SimpleDecoder`.
     *   Deprecate `C.MSG_*` constants, replacing them with constants in
         `Renderer`.
-    *   Split the `library-core` module into `library-core`,
-        `library-common` and `library-extractor`. The `library-core` module
-        has an API dependency on both of the new modules, so this change
-        should be transparent to developers including ExoPlayer using Gradle
-        dependencies.
+    *   Split the `library-core` module into `library-core`, `library-common`
+        and `library-extractor`. The `library-core` module has an API dependency
+        on both of the new modules, so this change should be transparent to
+        developers including ExoPlayer using Gradle dependencies.
     *   Add a dependency on Guava.
 *   Video:
     *   Pass frame rate hint to `Surface.setFrameRate` on Android 11.
@@ -144,6 +150,10 @@
         the `AudioCapabilities`
         ([#7404](https://github.com/google/ExoPlayer/issues/7404)).
 *   Text:
+    *   Many of the changes described below improve support for Japanese
+        subtitles. Read
+        [this blog post](https://medium.com/google-exoplayer/improved-japanese-subtitle-support-7598fee12cf4)
+        to learn more.
     *   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
@@ -306,8 +316,8 @@
 *   Analytics:
     *   Extend `EventTime` with more details about the current player state
         ([#7332](https://github.com/google/ExoPlayer/issues/7332)).
-    *   Add `AnalyticsListener.onVideoFrameProcessingOffset` to report how
-        early or late video frames are processed relative to them needing to be
+    *   Add `AnalyticsListener.onVideoFrameProcessingOffset` to report how early
+        or late video frames are processed relative to them needing to be
         presented. Video frame processing offset fields are also added to
         `DecoderCounters`.
     *   Fix incorrect `MediaPeriodId` for some renderer errors reported by
@@ -317,7 +327,9 @@
 *   Test utils: Add `TestExoPlayer`, a utility class with APIs to create
     `SimpleExoPlayer` instances with fake components for testing.
 *   Media2 extension: This is a new extension that makes it easy to use
-    ExoPlayer together with AndroidX Media2.
+    ExoPlayer together with AndroidX Media2. Read
+    [this blog post](https://medium.com/google-exoplayer/the-media2-extension-for-exoplayer-d6b7d89b9063)
+    to learn more.
 *   Cast extension: Implement playlist API and deprecate the old queue
     manipulation API.
 *   IMA extension:
@@ -347,11 +359,11 @@
         *   Add `clip_start_position_ms` and `clip_end_position_ms` to allow
             clipped samples.
     *   Use `StyledPlayerControlView` rather than `PlayerView`.
-    *   Remove support for media tunneling, random ABR and playback of
-        spherical video. Developers wishing to experiment with these features
-        can enable them by modifying the demo app source code.
-    *   Add support for downloading DRM-protected content using offline
-        Widevine licenses.
+    *   Remove support for media tunneling, random ABR and playback of spherical
+        video. Developers wishing to experiment with these features can enable
+        them by modifying the demo app source code.
+    *   Add support for downloading DRM-protected content using offline Widevine
+        licenses.
 
 ### 2.11.8 (2020-08-25) ###