1# Release notes
2
3### dev-v2 (not yet released)
4
5*   Core library:
6    *   Add playbackPositionUs parameter to 'LoadControl.shouldContinueLoading'.
7    *   The `DefaultLoadControl` default minimum buffer is set to 50 seconds,
8        equal to the default maximum buffer. `DefaultLoadControl` applies the
9        same behavior for audio and video.
10    *   Add API in `AnalyticsListener` to report video frame processing offset.
11        `MediaCodecVideoRenderer` reports the event.
12    *   Add fields `videoFrameProcessingOffsetUsSum` and
13        `videoFrameProcessingOffsetUsCount` in `DecoderCounters` to compute the
14        average video frame processing offset.
15    *   Add playlist API
16        ([#6161](https://github.com/google/ExoPlayer/issues/6161)).
17    *   Add `play` and `pause` methods to `Player`.
18    *   Add `Player.getCurrentLiveOffset` to conveniently return the live
19        offset.
20    *   Add `Player.onPlayWhenReadyChanged` with reasons.
21    *   Add `Player.onPlaybackStateChanged` and deprecate
22        `Player.onPlayerStateChanged`.
23    *   Add `Player.setAudioSessionId` to set the session ID attached to the
24        `AudioTrack`.
25    *   Deprecate and rename `getPlaybackError` to `getPlayerError` for
26        consistency.
27    *   Deprecate and rename `onLoadingChanged` to `onIsLoadingChanged` for
28        consistency.
29    *   Deprecate `onSeekProcessed` because all seek changes happen instantly
30        now and listening to `onPositionDiscontinuity` is sufficient.
31    *   Add `ExoPlayer.setPauseAtEndOfMediaItems` to let the player pause at the
32        end of each media item
33        ([#5660](https://github.com/google/ExoPlayer/issues/5660)).
34    *   Split `setPlaybackParameter` into `setPlaybackSpeed` and
35        `AudioComponent.setSkipSilenceEnabled` with callbacks
36        `onPlaybackSpeedChanged` and
37        `AudioListener.onSkipSilenceEnabledChanged`.
38    *   Make `MediaSourceEventListener.LoadEventInfo` and
39        `MediaSourceEventListener.MediaLoadData` top-level classes.
40    *   Rename `MediaCodecRenderer.onOutputFormatChanged` to
41        `MediaCodecRenderer.onOutputMediaFormatChanged`, further clarifying the
42        distinction between `Format` and `MediaFormat`.
43    *   Improve `Format` propagation within the media codec renderer
44        ([#6646](https://github.com/google/ExoPlayer/issues/6646)).
45    *   Move player message-related constants from `C` to `Renderer`, to avoid
46        having the constants class depend on player/renderer classes.
47    *   Split out `common` and `extractor` submodules.
48    *   Allow to explicitly send `PlayerMessage`s at the end of a stream.
49    *   Add `DataSpec.Builder` and deprecate most `DataSpec` constructors.
50    *   Add `DataSpec.customData` to allow applications to pass custom data
51        through `DataSource` chains.
52    *   Add a sample count parameter to `MediaCodecRenderer.processOutputBuffer`
53        and `AudioSink.handleBuffer` to allow batching multiple encoded frames
54        in one buffer.
55    *   Add a `Format.Builder` and deprecate all `Format.create*` methods and
56        most `Format.copyWith*` methods.
57    *   Split `Format.bitrate` into `Format.averageBitrate` and
58        `Format.peakBitrate`
59        ([#2863](https://github.com/google/ExoPlayer/issues/2863)).
60    *   Add option to `MergingMediaSource` to adjust the time offsets between
61        the merged sources
62        ([#6103](https://github.com/google/ExoPlayer/issues/6103)).
63    *   `SimpleDecoderVideoRenderer` and `SimpleDecoderAudioRenderer` renamed to
64        `DecoderVideoRenderer` and `DecoderAudioRenderer` respectively, and
65        generalized to work with `Decoder` rather than `SimpleDecoder`.
66    *   Add media item based playlist API to Player.
67    *   Remove deprecated members in `DefaultTrackSelector`.
68    *   Add `Player.DeviceComponent` and implement it for `SimpleExoPlayer` so
69        that the device volume can be controlled by player.
70    *   Avoid throwing an exception while parsing fragmented MP4 default sample
71        values where the most-significant bit is set
72        ([#7207](https://github.com/google/ExoPlayer/issues/7207)).
73    *   Add `SilenceMediaSource.Factory` to support tags
74        ([PR #7245](https://github.com/google/ExoPlayer/pull/7245)).
75    *   Fix `AdsMediaSource` child `MediaSource`s not being released.
76    *   Parse track titles from Matroska files
77        ([#7247](https://github.com/google/ExoPlayer/pull/7247)).
78    *   Replace `CacheDataSinkFactory` and `CacheDataSourceFactory` with
79        `CacheDataSink.Factory` and `CacheDataSource.Factory` respectively.
80*   Text:
81    *   Parse `<ruby>` and `<rt>` tags in WebVTT subtitles (rendering is coming
82        later).
83    *   Parse `text-combine-upright` CSS property (i.e. tate-chu-yoko) in WebVTT
84        subtitles (rendering is coming later).
85    *   Parse `tts:combineText` property (i.e. tate-chu-yoko) in TTML subtitles
86        (rendering is coming later).
87    *   Fix `SubtitlePainter` to render `EDGE_TYPE_OUTLINE` using the correct
88        color ([#6724](https://github.com/google/ExoPlayer/pull/6724)).
89    *   Add support for WebVTT default
90        [text](https://www.w3.org/TR/webvtt1/#default-text-color) and
91        [background](https://www.w3.org/TR/webvtt1/#default-text-background)
92        colors ([PR #4178](https://github.com/google/ExoPlayer/pull/4178),
93        [issue #6581](https://github.com/google/ExoPlayer/issues/6581)).
94    *   Parse `tts:ruby` and `tts:rubyPosition` properties in TTML subtitles
95        (rendering is coming later).
96    *   Update WebVTT position alignment parsing to recognise `line-left`,
97        `center` and `line-right` as per the
98        [released spec](https://www.w3.org/TR/webvtt1/#webvtt-position-cue-setting)
99        (a
100        [previous draft](https://www.w3.org/TR/2014/WD-webvtt1-20141111/#dfn-webvtt-text-position-cue-setting)
101        used `start`, `middle` and `end`).
102    *   Use anti-aliasing and bitmap filtering when displaying bitmap subtitles
103        ([#6950](https://github.com/google/ExoPlayer/pull/6950)).
104    *   Implement timing-out of stuck CEA-608 captions (as permitted by
105        ANSI/CTA-608-E R-2014 Annex C.9) and set the default timeout to 16
106        seconds ([#7181](https://github.com/google/ExoPlayer/issues/7181)).
107*   DRM:
108    *   Add support for attaching DRM sessions to clear content in the demo app.
109    *   Remove `DrmSessionManager` references from all renderers.
110        `DrmSessionManager` must be injected into the MediaSources using the
111        MediaSources factories.
112    *   Add option to inject a custom `DefaultDrmSessionManager` into
113        `OfflineLicenseHelper`
114        ([#7078](https://github.com/google/ExoPlayer/issues/7078)).
115    *   Remove generics from DRM components.
116*   Downloads and caching:
117    *   Merge downloads in `SegmentDownloader` to improve overall download speed
118        ([#5978](https://github.com/google/ExoPlayer/issues/5978)).
119    *   Replace `CacheDataSinkFactory` and `CacheDataSourceFactory` with
120        `CacheDataSink.Factory` and `CacheDataSource.Factory` respectively.
121    *   Remove `DownloadConstructorHelper` and use `CacheDataSource.Factory`
122        directly instead.
123    *   Update `CachedContentIndex` to use `SecureRandom` for generating the
124        initialization vector used to encrypt the cache contents.
125*   DASH:
126    *   Merge trick play adaptation sets (i.e., adaptation sets marked with
127        `http://dashif.org/guidelines/trickmode`) into the same `TrackGroup` as
128        the main adaptation sets to which they refer. Trick play tracks are
129        marked with the `C.ROLE_FLAG_TRICK_PLAY` flag.
130    *   Fix assertion failure in `SampleQueue` when playing DASH streams with
131        EMSG tracks ([#7273](https://github.com/google/ExoPlayer/issues/7273)).
132*   MP3: Add `IndexSeeker` for accurate seeks in VBR streams
133    ([#6787](https://github.com/google/ExoPlayer/issues/6787)). This seeker is
134    enabled by passing `FLAG_ENABLE_INDEX_SEEKING` to the `Mp3Extractor`. It may
135    require to scan a significant portion of the file for seeking, which may be
136    costly on large files.
137*   MP4: Store the Android capture frame rate only in `Format.metadata`.
138    `Format.frameRate` now stores the calculated frame rate.
139*   MPEG-TS: Fix issue where SEI NAL units were incorrectly dropped from H.265
140    samples ([#7113](https://github.com/google/ExoPlayer/issues/7113)).
141*   Testing
142    *   Add `TestExoPlayer`, a utility class with APIs to create
143        `SimpleExoPlayer` instances with fake components for testing.
144    *   Upgrade Truth dependency from 0.44 to 1.0.
145    *   Upgrade to JUnit 4.13-rc-2.
146*   UI
147    *   Add `showScrubber` and `hideScrubber` methods to DefaultTimeBar.
148    *   Move logic of prev, next, fast forward and rewind to ControlDispatcher
149        ([#6926](https://github.com/google/ExoPlayer/issues/6926)).
150*   Metadata: Add minimal DVB Application Information Table (AIT) support
151    ([#6922](https://github.com/google/ExoPlayer/pull/6922)).
152*   Cast extension: Implement playlist API and deprecate the old queue
153    manipulation API.
154*   Demo app: Retain previous position in list of samples.
155*   Change the order of extractors for sniffing to reduce start-up latency in
156    `DefaultExtractorsFactory` and `DefaultHlsExtractorsFactory`
157    ([#6410](https://github.com/google/ExoPlayer/issues/6410)).
158*   Add missing `@Nullable` annotations to `MediaSessionConnector`
159    ([#7234](https://github.com/google/ExoPlayer/issues/7234)).
160
161### 2.11.4 (2020-04-08)
162
163*   Add `SimpleExoPlayer.setWakeMode` to allow automatic `WifiLock` and
164    `WakeLock` handling
165    ([#6914](https://github.com/google/ExoPlayer/issues/6914)). To use this
166    feature, you must add the
167    [WAKE_LOCK](https://developer.android.com/reference/android/Manifest.permission.html#WAKE_LOCK)
168    permission to your application's manifest file.
169*   Text:
170    *   Catch and log exceptions in `TextRenderer` rather than re-throwing. This
171        allows playback to continue even if subtitle decoding fails
172        ([#6885](https://github.com/google/ExoPlayer/issues/6885)).
173    *   Allow missing hours and milliseconds in SubRip (.srt) timecodes
174        ([#7122](https://github.com/google/ExoPlayer/issues/7122)).
175*   Audio:
176    *   Enable playback speed adjustment and silence skipping for floating point
177        PCM audio, via resampling to 16-bit integer PCM. To output the original
178        floating point audio without adjustment, pass `enableFloatOutput=true`
179        to the `DefaultAudioSink` constructor
180        ([#7134](https://github.com/google/ExoPlayer/issues/7134)).
181    *   Workaround issue that could cause slower than realtime playback of AAC
182        on Android 10 ([#6671](https://github.com/google/ExoPlayer/issues/6671).
183    *   Fix case where another app spuriously holding transient audio focus
184        could prevent ExoPlayer from acquiring audio focus for an indefinite
185        period of time
186        ([#7182](https://github.com/google/ExoPlayer/issues/7182).
187    *   Fix case where the player volume could be permanently ducked if audio
188        focus was released whilst ducking.
189    *   Fix playback of WAV files with trailing non-media bytes
190        ([#7129](https://github.com/google/ExoPlayer/issues/7129)).
191    *   Fix playback of ADTS files with mid-stream ID3 metadata.
192*   DRM:
193    *   Fix stuck ad playbacks with DRM protected content
194        ([#7188](https://github.com/google/ExoPlayer/issues/7188)).
195    *   Fix playback of Widevine protected content that only provides V1 PSSH
196        atoms on API levels 21 and 22.
197    *   Fix playback of PlayReady content on Fire TV Stick (Gen 2).
198*   DASH:
199    *   Update the manifest URI to avoid repeated HTTP redirects
200        ([#6907](https://github.com/google/ExoPlayer/issues/6907)).
201    *   Parse period `AssetIdentifier` elements.
202*   HLS: Recognize IMSC subtitles
203    ([#7185](https://github.com/google/ExoPlayer/issues/7185)).
204*   UI: Add an option to set whether to use the orientation sensor for rotation
205    in spherical playbacks
206    ([#6761](https://github.com/google/ExoPlayer/issues/6761)).
207*   Analytics: Fix `PlaybackStatsListener` behavior when not keeping history
208    ([#7160](https://github.com/google/ExoPlayer/issues/7160)).
209*   FFmpeg extension: Add support for `x86_64` architecture.
210*   Opus extension: Fix parsing of negative gain values
211    ([#7046](https://github.com/google/ExoPlayer/issues/7046)).
212*   Cast extension: Upgrade `play-services-cast-framework` dependency to 18.1.0.
213    This fixes an issue where `RemoteServiceException` was thrown due to
214    `Context.startForegroundService()` not calling `Service.startForeground()`
215    ([#7191](https://github.com/google/ExoPlayer/issues/7191)).
216
217### 2.11.3 (2020-02-19)
218
219*   SmoothStreaming: Fix regression that broke playback in 2.11.2
220    ([#6981](https://github.com/google/ExoPlayer/issues/6981)).
221*   DRM: Fix issue switching from protected content that uses a 16-byte
222    initialization vector to one that uses an 8-byte initialization vector
223    ([#6982](https://github.com/google/ExoPlayer/issues/6982)).
224
225### 2.11.2 (2020-02-13)
226
227*   Add Java FLAC extractor
228    ([#6406](https://github.com/google/ExoPlayer/issues/6406)).
229*   Startup latency optimization:
230    *   Reduce startup latency for DASH and SmoothStreaming playbacks by
231        allowing codec initialization to occur before the network connection for
232        the first media segment has been established.
233    *   Reduce startup latency for on-demand DASH playbacks by allowing codec
234        initialization to occur before the sidx box has been loaded.
235*   Downloads:
236    *   Fix download resumption when the requirements for them to continue are
237        met ([#6733](https://github.com/google/ExoPlayer/issues/6733),
238        [#6798](https://github.com/google/ExoPlayer/issues/6798)).
239    *   Fix `DownloadHelper.createMediaSource` to use `customCacheKey` when
240        creating `ProgressiveMediaSource` instances.
241*   DRM: Fix `NullPointerException` when playing DRM protected content
242    ([#6951](https://github.com/google/ExoPlayer/issues/6951)).
243*   Metadata:
244    *   Update `IcyDecoder` to try ISO-8859-1 decoding if UTF-8 decoding fails.
245        Also change `IcyInfo.rawMetadata` from `String` to `byte[]` to allow
246        developers to handle data that's neither UTF-8 nor ISO-8859-1
247        ([#6753](https://github.com/google/ExoPlayer/issues/6753)).
248    *   Select multiple metadata tracks if multiple metadata renderers are
249        available ([#6676](https://github.com/google/ExoPlayer/issues/6676)).
250    *   Add support for ID3 genres added in Wimamp 5.6 (2010).
251*   UI:
252    *   Show ad group markers in `DefaultTimeBar` even if they are after the end
253        of the current window
254        ([#6552](https://github.com/google/ExoPlayer/issues/6552)).
255    *   Don't use notification chronometer if playback speed is != 1.0
256        ([#6816](https://github.com/google/ExoPlayer/issues/6816)).
257*   HLS: Fix playback of DRM protected content that uses key rotation
258    ([#6903](https://github.com/google/ExoPlayer/issues/6903)).
259*   WAV:
260    *   Support IMA ADPCM encoded data.
261    *   Improve support for G.711 A-law and mu-law encoded data.
262*   MP4: Support "twos" codec (big endian PCM)
263    ([#5789](https://github.com/google/ExoPlayer/issues/5789)).
264*   FMP4: Add support for encrypted AC-4 tracks.
265*   HLS: Fix slow seeking into long MP3 segments
266    ([#6155](https://github.com/google/ExoPlayer/issues/6155)).
267*   Fix handling of E-AC-3 streams that contain AC-3 syncframes
268    ([#6602](https://github.com/google/ExoPlayer/issues/6602)).
269*   Fix playback of TrueHD streams in Matroska
270    ([#6845](https://github.com/google/ExoPlayer/issues/6845)).
271*   Fix MKV subtitles to disappear when intended instead of lasting until the
272    next cue ([#6833](https://github.com/google/ExoPlayer/issues/6833)).
273*   OkHttp extension: Upgrade OkHttp dependency to 3.12.8, which fixes a class
274    of `SocketTimeoutException` issues when using HTTP/2
275    ([#4078](https://github.com/google/ExoPlayer/issues/4078)).
276*   FLAC extension: Fix handling of bit depths other than 16 in `FLACDecoder`.
277    This issue caused FLAC streams with other bit depths to sound like white
278    noise on earlier releases, but only when embedded in a non-FLAC container
279    such as Matroska or MP4.
280*   Demo apps: Add
281    [GL demo app](https://github.com/google/ExoPlayer/tree/dev-v2/demos/gl) to
282    show how to render video to a `GLSurfaceView` while applying a GL shader.
283    ([#6920](https://github.com/google/ExoPlayer/issues/6920)).
284
285### 2.11.1 (2019-12-20)
286
287*   UI: Exclude `DefaultTimeBar` region from system gesture detection
288    ([#6685](https://github.com/google/ExoPlayer/issues/6685)).
289*   ProGuard fixes:
290    *   Ensure `Libgav1VideoRenderer` constructor is kept for use by
291        `DefaultRenderersFactory`
292        ([#6773](https://github.com/google/ExoPlayer/issues/6773)).
293    *   Ensure `VideoDecoderOutputBuffer` and its members are kept for use by
294        video decoder extensions.
295    *   Ensure raw resources used with `RawResourceDataSource` are kept.
296    *   Suppress spurious warnings about the `javax.annotation` package, and
297        restructure use of `IntDef` annotations to remove spurious warnings
298        about `SsaStyle$SsaAlignment`
299        ([#6771](https://github.com/google/ExoPlayer/issues/6771)).
300*   Fix `CacheDataSource` to correctly propagate `DataSpec.httpRequestHeaders`.
301*   Fix issue with `DefaultDownloadIndex` that could result in an
302    `IllegalStateException` being thrown from
303    `DefaultDownloadIndex.getDownloadForCurrentRow`
304    ([#6785](https://github.com/google/ExoPlayer/issues/6785)).
305*   Fix `IndexOutOfBoundsException` in `SinglePeriodTimeline.getWindow`
306    ([#6776](https://github.com/google/ExoPlayer/issues/6776)).
307*   Add missing `@Nullable` to `MediaCodecAudioRenderer.getMediaClock` and
308    `SimpleDecoderAudioRenderer.getMediaClock`
309    ([#6792](https://github.com/google/ExoPlayer/issues/6792)).
310
311### 2.11.0 (2019-12-11)
312
313*   Core library:
314    *   Replace `ExoPlayerFactory` by `SimpleExoPlayer.Builder` and
315        `ExoPlayer.Builder`.
316    *   Add automatic `WakeLock` handling to `SimpleExoPlayer`, which can be
317        enabled by calling `SimpleExoPlayer.setHandleWakeLock`
318        ([#5846](https://github.com/google/ExoPlayer/issues/5846)). To use this
319        feature, you must add the
320        [WAKE_LOCK](https://developer.android.com/reference/android/Manifest.permission.html#WAKE_LOCK)
321        permission to your application's manifest file.
322    *   Add automatic "audio becoming noisy" handling to `SimpleExoPlayer`,
323        which can be enabled by calling
324        `SimpleExoPlayer.setHandleAudioBecomingNoisy`.
325    *   Wrap decoder exceptions in a new `DecoderException` class and report
326        them as renderer errors.
327    *   Add `Timeline.Window.isLive` to indicate that a window is a live stream
328        ([#2668](https://github.com/google/ExoPlayer/issues/2668) and
329        [#5973](https://github.com/google/ExoPlayer/issues/5973)).
330    *   Add `Timeline.Window.uid` to uniquely identify window instances.
331    *   Deprecate `setTag` parameter of `Timeline.getWindow`. Tags will always
332        be set.
333    *   Deprecate passing the manifest directly to
334        `Player.EventListener.onTimelineChanged`. It can be accessed through
335        `Timeline.Window.manifest` or `Player.getCurrentManifest()`
336    *   Add `MediaSource.enable` and `MediaSource.disable` to improve resource
337        management in playlists.
338    *   Add `MediaPeriod.isLoading` to improve `Player.isLoading` state.
339    *   Fix issue where player errors are thrown too early at playlist
340        transitions ([#5407](https://github.com/google/ExoPlayer/issues/5407)).
341    *   Add `Format` and renderer support flags to renderer
342        `ExoPlaybackException`s.
343    *   Where there are multiple platform decoders for a given MIME type, prefer
344        to use one that advertises support for the profile and level of the
345        media being played over one that does not, even if it does not come
346        first in the `MediaCodecList`.
347*   DRM:
348    *   Inject `DrmSessionManager` into the `MediaSources` instead of
349        `Renderers`. This allows each `MediaSource` in a
350        `ConcatenatingMediaSource` to use a different `DrmSessionManager`
351        ([#5619](https://github.com/google/ExoPlayer/issues/5619)).
352    *   Add `DefaultDrmSessionManager.Builder`, and remove
353        `DefaultDrmSessionManager` static factory methods that leaked
354        `ExoMediaDrm` instances
355        ([#4721](https://github.com/google/ExoPlayer/issues/4721)).
356    *   Add support for the use of secure decoders when playing clear content
357        ([#4867](https://github.com/google/ExoPlayer/issues/4867)). This can be
358        enabled using `DefaultDrmSessionManager.Builder`'s
359        `setUseDrmSessionsForClearContent` method.
360    *   Add support for custom `LoadErrorHandlingPolicies` in key and
361        provisioning requests
362        ([#6334](https://github.com/google/ExoPlayer/issues/6334)). Custom
363        policies can be passed via `DefaultDrmSessionManager.Builder`'s
364        `setLoadErrorHandlingPolicy` method.
365    *   Use `ExoMediaDrm.Provider` in `OfflineLicenseHelper` to avoid leaking
366        `ExoMediaDrm` instances
367        ([#4721](https://github.com/google/ExoPlayer/issues/4721)).
368*   Track selection:
369    *   Update `DefaultTrackSelector` to set a viewport constraint for the
370        default display by default.
371    *   Update `DefaultTrackSelector` to set text language and role flag
372        constraints for the device's accessibility settings by default
373        ([#5749](https://github.com/google/ExoPlayer/issues/5749)).
374    *   Add option to set preferred text role flags using
375        `DefaultTrackSelector.ParametersBuilder.setPreferredTextRoleFlags`.
376*   LoadControl:
377    *   Default `prioritizeTimeOverSizeThresholds` to false to prevent OOM
378        errors ([#6647](https://github.com/google/ExoPlayer/issues/6647)).
379*   Android 10:
380    *   Set `compileSdkVersion` to 29 to enable use of Android 10 APIs.
381    *   Expose new `isHardwareAccelerated`, `isSoftwareOnly` and `isVendor`
382        flags in `MediaCodecInfo`
383        ([#5839](https://github.com/google/ExoPlayer/issues/5839)).
384    *   Add `allowedCapturePolicy` field to `AudioAttributes` to allow to
385        configuration of the audio capture policy.
386*   Video:
387    *   Pass the codec output `MediaFormat` to `VideoFrameMetadataListener`.
388    *   Fix byte order of HDR10+ static metadata to match CTA-861.3.
389    *   Support out-of-band HDR10+ dynamic metadata for VP9 in WebM/Matroska.
390    *   Assume that protected content requires a secure decoder when evaluating
391        whether `MediaCodecVideoRenderer` supports a given video format
392        ([#5568](https://github.com/google/ExoPlayer/issues/5568)).
393    *   Fix Dolby Vision fallback to AVC and HEVC.
394    *   Fix early end-of-stream detection when using video tunneling, on API
395        level 23 and above.
396    *   Fix an issue where a keyframe was rendered rather than skipped when
397        performing an exact seek to a non-zero position close to the start of
398        the stream.
399*   Audio:
400    *   Fix the start of audio getting truncated when transitioning to a new
401        item in a playlist of Opus streams.
402    *   Workaround broken raw audio decoding on Oppo R9
403        ([#5782](https://github.com/google/ExoPlayer/issues/5782)).
404    *   Reconfigure audio sink when PCM encoding changes
405        ([#6601](https://github.com/google/ExoPlayer/issues/6601)).
406    *   Allow `AdtsExtractor` to encounter EOF when calculating average frame
407        size ([#6700](https://github.com/google/ExoPlayer/issues/6700)).
408*   Text:
409    *   Add support for position and overlapping start/end times in SSA/ASS
410        subtitles ([#6320](https://github.com/google/ExoPlayer/issues/6320)).
411    *   Require an end time or duration for SubRip (SRT) and SubStation Alpha
412        (SSA/ASS) subtitles. This applies to both sidecar files & subtitles
413        [embedded in Matroska streams](https://matroska.org/technical/specs/subtitles/index.html).
414*   UI:
415    *   Make showing and hiding player controls accessible to TalkBack in
416        `PlayerView`.
417    *   Rename `spherical_view` surface type to `spherical_gl_surface_view`.
418    *   Make it easier to override the shuffle, repeat, fullscreen, VR and small
419        notification icon assets
420        ([#6709](https://github.com/google/ExoPlayer/issues/6709)).
421*   Analytics:
422    *   Remove `AnalyticsCollector.Factory`. Instances should be created
423        directly, and the `Player` should be set by calling
424        `AnalyticsCollector.setPlayer`.
425    *   Add `PlaybackStatsListener` to collect `PlaybackStats` for analysis and
426        analytics reporting.
427*   DataSource
428    *   Add `DataSpec.httpRequestHeaders` to support setting per-request headers
429        for HTTP and HTTPS.
430    *   Remove the `DataSpec.FLAG_ALLOW_ICY_METADATA` flag. Use is replaced by
431        setting the `IcyHeaders.REQUEST_HEADER_ENABLE_METADATA_NAME` header in
432        `DataSpec.httpRequestHeaders`.
433    *   Fail more explicitly when local file URIs contain invalid parts (e.g. a
434        fragment) ([#6470](https://github.com/google/ExoPlayer/issues/6470)).
435*   DASH: Support negative @r values in segment timelines
436    ([#1787](https://github.com/google/ExoPlayer/issues/1787)).
437*   HLS:
438    *   Use peak bitrate rather than average bitrate for adaptive track
439        selection.
440    *   Fix issue where streams could get stuck in an infinite buffering state
441        after a postroll ad
442        ([#6314](https://github.com/google/ExoPlayer/issues/6314)).
443*   Matroska: Support lacing in Blocks
444    ([#3026](https://github.com/google/ExoPlayer/issues/3026)).
445*   AV1 extension:
446    *   New in this release. The AV1 extension allows use of the
447        [libgav1 software decoder](https://chromium.googlesource.com/codecs/libgav1/)
448        in ExoPlayer. You can read more about playing AV1 videos with ExoPlayer
449        [here](https://medium.com/google-exoplayer/playing-av1-videos-with-exoplayer-a7cb19bedef9).
450*   VP9 extension:
451    *   Update to use NDK r20.
452    *   Rename `VpxVideoSurfaceView` to `VideoDecoderSurfaceView` and move it to
453        the core library.
454    *   Move `LibvpxVideoRenderer.MSG_SET_OUTPUT_BUFFER_RENDERER` to
455        `C.MSG_SET_OUTPUT_BUFFER_RENDERER`.
456    *   Use `VideoDecoderRenderer` as an implementation of
457        `VideoDecoderOutputBufferRenderer`, instead of
458        `VideoDecoderSurfaceView`.
459*   FLAC extension: Update to use NDK r20.
460*   Opus extension: Update to use NDK r20.
461*   FFmpeg extension:
462    *   Update to use NDK r20.
463    *   Update to use FFmpeg version 4.2. It is necessary to rebuild the native
464        part of the extension after this change, following the instructions in
465        the extension's readme.
466*   MediaSession extension: Add `MediaSessionConnector.setCaptionCallback` to
467    support `ACTION_SET_CAPTIONING_ENABLED` events.
468*   GVR extension: This extension is now deprecated.
469*   Demo apps:
470    *   Add
471        [SurfaceControl demo app](https://github.com/google/ExoPlayer/tree/r2.11.0/demos/surface)
472        to show how to use the Android 10 `SurfaceControl` API with ExoPlayer
473        ([#677](https://github.com/google/ExoPlayer/issues/677)).
474    *   Add support for subtitle files to the
475        [Main demo app](https://github.com/google/ExoPlayer/tree/r2.11.0/demos/main)
476        ([#5523](https://github.com/google/ExoPlayer/issues/5523)).
477    *   Remove the IMA demo app. IMA functionality is demonstrated by the
478        [main demo app](https://github.com/google/ExoPlayer/tree/r2.11.0/demos/main).
479    *   Add basic DRM support to the
480        [Cast demo app](https://github.com/google/ExoPlayer/tree/r2.11.0/demos/cast).
481*   TestUtils: Publish the `testutils` module to simplify unit testing with
482    ExoPlayer ([#6267](https://github.com/google/ExoPlayer/issues/6267)).
483*   IMA extension: Remove `AdsManager` listeners on release to avoid leaking an
484    `AdEventListener` provided by the app
485    ([#6687](https://github.com/google/ExoPlayer/issues/6687)).
486
487### 2.10.8 (2019-11-19)
488
489*   E-AC3 JOC
490    *   Handle new signaling in DASH manifests
491        ([#6636](https://github.com/google/ExoPlayer/issues/6636)).
492    *   Fix E-AC3 JOC passthrough playback failing to initialize due to
493        incorrect channel count check.
494*   FLAC
495    *   Fix sniffing for some FLAC streams.
496    *   Fix FLAC `Format.bitrate` values.
497*   Parse ALAC channel count and sample rate information from a more robust
498    source when contained in MP4
499    ([#6648](https://github.com/google/ExoPlayer/issues/6648)).
500*   Fix seeking into multi-period content in the edge case that the period
501    containing the seek position has just been removed
502    ([#6641](https://github.com/google/ExoPlayer/issues/6641)).
503
504### 2.10.7 (2019-11-06)
505
506*   HLS: Fix detection of Dolby Atmos to match the HLS authoring specification.
507*   MediaSession extension: Update shuffle and repeat modes when playback state
508    is invalidated ([#6582](https://github.com/google/ExoPlayer/issues/6582)).
509*   Fix the start of audio getting truncated when transitioning to a new item in
510    a playlist of Opus streams.
511
512### 2.10.6 (2019-10-17)
513
514*   Add `Player.onPlaybackSuppressionReasonChanged` to allow listeners to detect
515    playbacks suppressions (e.g. transient audio focus loss) directly
516    ([#6203](https://github.com/google/ExoPlayer/issues/6203)).
517*   DASH:
518    *   Support `Label` elements
519        ([#6297](https://github.com/google/ExoPlayer/issues/6297)).
520    *   Support legacy audio channel configuration
521        ([#6523](https://github.com/google/ExoPlayer/issues/6523)).
522*   HLS: Add support for ID3 in EMSG when using FMP4 streams
523    ([spec](https://aomediacodec.github.io/av1-id3/)).
524*   MP3: Add workaround to avoid prematurely ending playback of some SHOUTcast
525    live streams ([#6537](https://github.com/google/ExoPlayer/issues/6537),
526    [#6315](https://github.com/google/ExoPlayer/issues/6315) and
527    [#5658](https://github.com/google/ExoPlayer/issues/5658)).
528*   Metadata: Expose the raw ICY metadata through `IcyInfo`
529    ([#6476](https://github.com/google/ExoPlayer/issues/6476)).
530*   UI:
531    *   Setting `app:played_color` on `PlayerView` and `PlayerControlView` no
532        longer adjusts the colors of the scrubber handle , buffered and unplayed
533        parts of the time bar. These can be set separately using
534        `app:scrubber_color`, `app:buffered_color` and `app_unplayed_color`
535        respectively.
536    *   Setting `app:ad_marker_color` on `PlayerView` and `PlayerControlView` no
537        longer adjusts the color of played ad markers. The color of played ad
538        markers can be set separately using `app:played_ad_marker_color`.
539
540### 2.10.5 (2019-09-20)
541
542*   Add `Player.isPlaying` and `EventListener.onIsPlayingChanged` to check
543    whether the playback position is advancing. This helps to determine if
544    playback is suppressed due to audio focus loss. Also add
545    `Player.getPlaybackSuppressedReason` to determine the reason of the
546    suppression ([#6203](https://github.com/google/ExoPlayer/issues/6203)).
547*   Track selection
548    *   Add `allowAudioMixedChannelCountAdaptiveness` parameter to
549        `DefaultTrackSelector` to allow adaptive selections of audio tracks with
550        different channel counts.
551    *   Improve text selection logic to always prefer the better language
552        matches over other selection parameters.
553    *   Fix audio selection issue where languages are compared by bitrate
554        ([#6335](https://github.com/google/ExoPlayer/issues/6335)).
555*   Performance
556    *   Increase maximum video buffer size from 13MB to 32MB. The previous
557        default was too small for high quality streams.
558    *   Reset `DefaultBandwidthMeter` to initial values on network change.
559    *   Bypass sniffing in `ProgressiveMediaPeriod` in case a single extractor
560        is provided ([#6325](https://github.com/google/ExoPlayer/issues/6325)).
561*   Metadata
562    *   Support EMSG V1 boxes in FMP4.
563    *   Support unwrapping of nested metadata (e.g. ID3 and SCTE-35 in EMSG).
564*   Add `HttpDataSource.getResponseCode` to provide the status code associated
565    with the most recent HTTP response.
566*   Fix transitions between packed audio and non-packed audio segments in HLS
567    ([#6444](https://github.com/google/ExoPlayer/issues/6444)).
568*   Fix issue where a request would be retried after encountering an error, even
569    though the `LoadErrorHandlingPolicy` classified the error as fatal.
570*   Fix initialization data handling for FLAC in MP4
571    ([#6396](https://github.com/google/ExoPlayer/issues/6396),
572    [#6397](https://github.com/google/ExoPlayer/issues/6397)).
573*   Fix decoder selection for E-AC3 JOC streams
574    ([#6398](https://github.com/google/ExoPlayer/issues/6398)).
575*   Fix `PlayerNotificationManager` to show play icon rather than pause icon
576    when playback is ended
577    ([#6324](https://github.com/google/ExoPlayer/issues/6324)).
578*   RTMP extension: Upgrade LibRtmp-Client-for-Android to fix RTMP playback
579    issues ([#4200](https://github.com/google/ExoPlayer/issues/4200),
580    [#4249](https://github.com/google/ExoPlayer/issues/4249),
581    [#4319](https://github.com/google/ExoPlayer/issues/4319),
582    [#4337](https://github.com/google/ExoPlayer/issues/4337)).
583*   IMA extension: Fix crash in `ImaAdsLoader.onTimelineChanged`
584    ([#5831](https://github.com/google/ExoPlayer/issues/5831)).
585
586### 2.10.4 (2019-07-26)
587
588*   Offline: Add `Scheduler` implementation that uses `WorkManager`.
589*   Add ability to specify a description when creating notification channels via
590    ExoPlayer library classes.
591*   Switch normalized BCP-47 language codes to use 2-letter ISO 639-1 language
592    tags instead of 3-letter ISO 639-2 language tags.
593*   Ensure the `SilenceMediaSource` position is in range
594    ([#6229](https://github.com/google/ExoPlayer/issues/6229)).
595*   WAV: Calculate correct duration for clipped streams
596    ([#6241](https://github.com/google/ExoPlayer/issues/6241)).
597*   MP3: Use CBR header bitrate, not calculated bitrate. This reverts a change
598    from 2.9.3 ([#6238](https://github.com/google/ExoPlayer/issues/6238)).
599*   FLAC extension: Parse `VORBIS_COMMENT` and `PICTURE` metadata
600    ([#5527](https://github.com/google/ExoPlayer/issues/5527)).
601*   Fix issue where initial seek positions get ignored when playing a preroll ad
602    ([#6201](https://github.com/google/ExoPlayer/issues/6201)).
603*   Fix issue where invalid language tags were normalized to "und" instead of
604    keeping the original
605    ([#6153](https://github.com/google/ExoPlayer/issues/6153)).
606*   Fix `DataSchemeDataSource` re-opening and range requests
607    ([#6192](https://github.com/google/ExoPlayer/issues/6192)).
608*   Fix FLAC and ALAC playback on some LG devices
609    ([#5938](https://github.com/google/ExoPlayer/issues/5938)).
610*   Fix issue when calling `performClick` on `PlayerView` without
611    `PlayerControlView`
612    ([#6260](https://github.com/google/ExoPlayer/issues/6260)).
613*   Fix issue where playback speeds are not used in adaptive track selections
614    after manual selection changes for other renderers
615    ([#6256](https://github.com/google/ExoPlayer/issues/6256)).
616
617### 2.10.3 (2019-07-09)
618
619*   Display last frame when seeking to end of stream
620    ([#2568](https://github.com/google/ExoPlayer/issues/2568)).
621*   Audio:
622    *   Fix an issue where not all audio was played out when the configuration
623        for the underlying track was changing (e.g., at some period
624        transitions).
625    *   Fix an issue where playback speed was applied inaccurately in playlists
626        ([#6117](https://github.com/google/ExoPlayer/issues/6117)).
627*   UI: Fix `PlayerView` incorrectly consuming touch events if no controller is
628    attached ([#6109](https://github.com/google/ExoPlayer/issues/6109)).
629*   CEA608: Fix repetition of special North American characters
630    ([#6133](https://github.com/google/ExoPlayer/issues/6133)).
631*   FLV: Fix bug that caused playback of some live streams to not start
632    ([#6111](https://github.com/google/ExoPlayer/issues/6111)).
633*   SmoothStreaming: Parse text stream `Subtype` into `Format.roleFlags`.
634*   MediaSession extension: Fix `MediaSessionConnector.play()` not resuming
635    playback ([#6093](https://github.com/google/ExoPlayer/issues/6093)).
636
637### 2.10.2 (2019-06-03)
638
639*   Add `ResolvingDataSource` for just-in-time resolution of `DataSpec`s
640    ([#5779](https://github.com/google/ExoPlayer/issues/5779)).
641*   Add `SilenceMediaSource` that can be used to play silence of a given
642    duration ([#5735](https://github.com/google/ExoPlayer/issues/5735)).
643*   Offline:
644    *   Prevent unexpected `DownloadHelper.Callback.onPrepared` callbacks after
645        preparation of a `DownloadHelper` fails
646        ([#5915](https://github.com/google/ExoPlayer/issues/5915)).
647    *   Fix `CacheUtil.cache()` downloading too much data
648        ([#5927](https://github.com/google/ExoPlayer/issues/5927)).
649    *   Fix misreporting cached bytes when caching is paused
650        ([#5573](https://github.com/google/ExoPlayer/issues/5573)).
651*   UI:
652    *   Allow setting `DefaultTimeBar` attributes on `PlayerView` and
653        `PlayerControlView`.
654    *   Change playback controls toggle from touch down to touch up events
655        ([#5784](https://github.com/google/ExoPlayer/issues/5784)).
656    *   Fix issue where playback controls were not kept visible on key presses
657        ([#5963](https://github.com/google/ExoPlayer/issues/5963)).
658*   Subtitles:
659    *   CEA-608: Handle XDS and TEXT modes
660        ([#5807](https://github.com/google/ExoPlayer/pull/5807)).
661    *   TTML: Fix bitmap rendering
662        ([#5633](https://github.com/google/ExoPlayer/pull/5633)).
663*   IMA: Fix ad pod index offset calculation without preroll
664    ([#5928](https://github.com/google/ExoPlayer/issues/5928)).
665*   Add a `playWhenReady` flag to MediaSessionConnector.PlaybackPreparer methods
666    to indicate whether a controller sent a play or only a prepare command. This
667    allows to take advantage of decoder reuse with the MediaSessionConnector
668    ([#5891](https://github.com/google/ExoPlayer/issues/5891)).
669*   Add `ProgressUpdateListener` to `PlayerControlView`
670    ([#5834](https://github.com/google/ExoPlayer/issues/5834)).
671*   Add support for auto-detecting UDP streams in `DefaultDataSource`
672    ([#6036](https://github.com/google/ExoPlayer/pull/6036)).
673*   Allow enabling decoder fallback with `DefaultRenderersFactory`
674    ([#5942](https://github.com/google/ExoPlayer/issues/5942)).
675*   Gracefully handle revoked `ACCESS_NETWORK_STATE` permission
676    ([#6019](https://github.com/google/ExoPlayer/issues/6019)).
677*   Fix decoding problems when seeking back after seeking beyond a mid-roll ad
678    ([#6009](https://github.com/google/ExoPlayer/issues/6009)).
679*   Fix application of `maxAudioBitrate` for adaptive audio track groups
680    ([#6006](https://github.com/google/ExoPlayer/issues/6006)).
681*   Fix bug caused by parallel adaptive track selection using `Format`s without
682    bitrate information
683    ([#5971](https://github.com/google/ExoPlayer/issues/5971)).
684*   Fix bug in `CastPlayer.getCurrentWindowIndex()`
685    ([#5955](https://github.com/google/ExoPlayer/issues/5955)).
686
687### 2.10.1 (2019-05-16)
688
689*   Offline: Add option to remove all downloads.
690*   HLS: Fix `NullPointerException` when using HLS chunkless preparation
691    ([#5868](https://github.com/google/ExoPlayer/issues/5868)).
692*   Fix handling of empty values and line terminators in SHOUTcast ICY metadata
693    ([#5876](https://github.com/google/ExoPlayer/issues/5876)).
694*   Fix DVB subtitles for SDK 28
695    ([#5862](https://github.com/google/ExoPlayer/issues/5862)).
696*   Add a workaround for a decoder failure on ZTE Axon7 mini devices when
697    playing 48kHz audio
698    ([#5821](https://github.com/google/ExoPlayer/issues/5821)).
699
700### 2.10.0 (2019-04-15)
701
702*   Core library:
703    *   Improve decoder re-use between playbacks
704        ([#2826](https://github.com/google/ExoPlayer/issues/2826)). Read
705        [this blog post](https://medium.com/google-exoplayer/improved-decoder-reuse-in-exoplayer-ef4c6d99591d)
706        for more details.
707    *   Rename `ExtractorMediaSource` to `ProgressiveMediaSource`.
708    *   Fix issue where using `ProgressiveMediaSource.Factory` would mean that
709        `DefaultExtractorsFactory` would be kept by proguard. Custom
710        `ExtractorsFactory` instances must now be passed via the
711        `ProgressiveMediaSource.Factory` constructor, and `setExtractorsFactory`
712        is deprecated.
713    *   Make the default minimum buffer size equal the maximum buffer size for
714        video playbacks
715        ([#2083](https://github.com/google/ExoPlayer/issues/2083)).
716    *   Move `PriorityTaskManager` from `DefaultLoadControl` to
717        `SimpleExoPlayer`.
718    *   Add new `ExoPlaybackException` types for remote exceptions and
719        out-of-memory errors.
720    *   Use full BCP 47 language tags in `Format`.
721    *   Do not retry failed loads whose error is `FileNotFoundException`.
722    *   Fix issue where not resetting the position for a new `MediaSource` in
723        calls to `ExoPlayer.prepare` causes an `IndexOutOfBoundsException`
724        ([#5520](https://github.com/google/ExoPlayer/issues/5520)).
725*   Offline:
726    *   Improve offline support. `DownloadManager` now tracks all offline
727        content, not just tasks in progress. Read
728        [this page](https://exoplayer.dev/downloading-media.html) for more
729        details.
730*   Caching:
731    *   Improve performance of `SimpleCache`
732        ([#4253](https://github.com/google/ExoPlayer/issues/4253)).
733    *   Cache data with unknown length by default. The previous flag to opt in
734        to this behavior (`DataSpec.FLAG_ALLOW_CACHING_UNKNOWN_LENGTH`) has been
735        replaced with an opt out flag
736        (`DataSpec.FLAG_DONT_CACHE_IF_LENGTH_UNKNOWN`).
737*   Extractors:
738    *   MP4/FMP4: Add support for Dolby Vision.
739    *   MP4: Fix issue handling meta atoms in some streams
740        ([#5698](https://github.com/google/ExoPlayer/issues/5698),
741        [#5694](https://github.com/google/ExoPlayer/issues/5694)).
742    *   MP3: Add support for SHOUTcast ICY metadata
743        ([#3735](https://github.com/google/ExoPlayer/issues/3735)).
744    *   MP3: Fix ID3 frame unsychronization
745        ([#5673](https://github.com/google/ExoPlayer/issues/5673)).
746    *   MP3: Fix playback of badly clipped files
747        ([#5772](https://github.com/google/ExoPlayer/issues/5772)).
748    *   MPEG-TS: Enable HDMV DTS stream detection only if a flag is set. By
749        default (i.e. if the flag is not set), the 0x82 elementary stream type
750        is now treated as an SCTE subtitle track
751        ([#5330](https://github.com/google/ExoPlayer/issues/5330)).
752*   Track selection:
753    *   Add options for controlling audio track selections to
754        `DefaultTrackSelector`
755        ([#3314](https://github.com/google/ExoPlayer/issues/3314)).
756    *   Update `TrackSelection.Factory` interface to support creating all track
757        selections together.
758    *   Allow to specify a selection reason for a `SelectionOverride`.
759    *   Select audio track based on system language if no preference is
760        provided.
761    *   When no text language preference matches, only select forced text tracks
762        whose language matches the selected audio language.
763*   UI:
764    *   Update `DefaultTimeBar` based on duration of media and add parameter to
765        set the minimum update interval to control the smoothness of the updates
766        ([#5040](https://github.com/google/ExoPlayer/issues/5040)).
767    *   Move creation of dialogs for `TrackSelectionView`s to
768        `TrackSelectionDialogBuilder` and add option to select multiple
769        overrides.
770    *   Change signature of `PlayerNotificationManager.NotificationListener` to
771        better fit service requirements.
772    *   Add option to include navigation actions in the compact mode of
773        notifications created using `PlayerNotificationManager`.
774    *   Fix issues with flickering notifications on KitKat when using
775        `PlayerNotificationManager` and `DownloadNotificationUtil`. For the
776        latter, applications should switch to using
777        `DownloadNotificationHelper`.
778    *   Fix accuracy of D-pad seeking in `DefaultTimeBar`
779        ([#5767](https://github.com/google/ExoPlayer/issues/5767)).
780*   Audio:
781    *   Allow `AudioProcessor`s to be drained of pending output after they are
782        reconfigured.
783    *   Fix an issue that caused audio to be truncated at the end of a period
784        when switching to a new period where gapless playback information was
785        newly present or newly absent.
786    *   Add support for reading AC-4 streams
787        ([#5303](https://github.com/google/ExoPlayer/pull/5303)).
788*   Video:
789    *   Remove `MediaCodecSelector.DEFAULT_WITH_FALLBACK`. Apps should instead
790        signal that fallback should be used by passing `true` as the
791        `enableDecoderFallback` parameter when instantiating the video renderer.
792    *   Support video tunneling when the decoder is not listed first for the
793        MIME type ([#3100](https://github.com/google/ExoPlayer/issues/3100)).
794    *   Query `MediaCodecList.ALL_CODECS` when selecting a tunneling decoder
795        ([#5547](https://github.com/google/ExoPlayer/issues/5547)).
796*   DRM:
797    *   Fix black flicker when keys rotate in DRM protected content
798        ([#3561](https://github.com/google/ExoPlayer/issues/3561)).
799    *   Work around lack of LA_URL attribute in PlayReady key request init data.
800*   CEA-608: Improved conformance to the specification
801    ([#3860](https://github.com/google/ExoPlayer/issues/3860)).
802*   DASH:
803    *   Parse role and accessibility descriptors into `Format.roleFlags`.
804    *   Support multiple CEA-608 channels muxed into FMP4 representations
805        ([#5656](https://github.com/google/ExoPlayer/issues/5656)).
806*   HLS:
807    *   Prevent unnecessary reloads of initialization segments.
808    *   Form an adaptive track group out of audio renditions with matching name.
809    *   Support encrypted initialization segments
810        ([#5441](https://github.com/google/ExoPlayer/issues/5441)).
811    *   Parse `EXT-X-MEDIA` `CHARACTERISTICS` attribute into `Format.roleFlags`.
812    *   Add metadata entry for HLS tracks to expose master playlist information.
813    *   Prevent `IndexOutOfBoundsException` in some live HLS scenarios
814        ([#5816](https://github.com/google/ExoPlayer/issues/5816)).
815*   Support for playing spherical videos on Daydream.
816*   Cast extension: Work around Cast framework returning a limited-size queue
817    items list ([#4964](https://github.com/google/ExoPlayer/issues/4964)).
818*   VP9 extension: Remove RGB output mode and libyuv dependency, and switch to
819    surface YUV output as the default. Remove constructor parameters
820    `scaleToFit` and `useSurfaceYuvOutput`.
821*   MediaSession extension:
822    *   Let apps intercept media button events
823        ([#5179](https://github.com/google/ExoPlayer/issues/5179)).
824    *   Fix issue with `TimelineQueueNavigator` not publishing the queue in
825        shuffled order when in shuffle mode.
826    *   Allow handling of custom commands via `registerCustomCommandReceiver`.
827    *   Add ability to include an extras `Bundle` when reporting a custom error.
828*   Log warnings when extension native libraries can't be used, to help with
829    diagnosing playback failures
830    ([#5788](https://github.com/google/ExoPlayer/issues/5788)).
831
832### 2.9.6 (2019-02-19)
833
834*   Remove `player` and `isTopLevelSource` parameters from
835    `MediaSource.prepare`.
836*   IMA extension:
837    *   Require setting the `Player` on `AdsLoader` instances before playback.
838    *   Remove deprecated `ImaAdsMediaSource`. Create `AdsMediaSource` with an
839        `ImaAdsLoader` instead.
840    *   Remove deprecated `AdsMediaSource` constructors. Listen for media source
841        events using `AdsMediaSource.addEventListener`, and ad interaction
842        events by adding a listener when building `ImaAdsLoader`.
843    *   Allow apps to register playback-related obstructing views that are on
844        top of their ad display containers via `AdsLoader.AdViewProvider`.
845        `PlayerView` implements this interface and will register its control
846        view. This makes it possible for ad loading SDKs to calculate ad
847        viewability accurately.
848*   DASH: Fix issue handling large `EventStream` presentation timestamps
849    ([#5490](https://github.com/google/ExoPlayer/issues/5490)).
850*   HLS: Fix transition to STATE_ENDED when playing fragmented mp4 in chunkless
851    preparation ([#5524](https://github.com/google/ExoPlayer/issues/5524)).
852*   Revert workaround for video quality problems with Amlogic decoders, as this
853    may cause problems for some devices and/or non-interlaced content
854    ([#5003](https://github.com/google/ExoPlayer/issues/5003)).
855
856### 2.9.5 (2019-01-31)
857
858*   HLS: Parse `CHANNELS` attribute from `EXT-X-MEDIA` tag.
859*   ConcatenatingMediaSource:
860    *   Add `Handler` parameter to methods that take a callback `Runnable`.
861    *   Fix issue with dropped messages when releasing the source
862        ([#5464](https://github.com/google/ExoPlayer/issues/5464)).
863*   ExtractorMediaSource: Fix issue that could cause the player to get stuck
864    buffering at the end of the media.
865*   PlayerView: Fix issue preventing `OnClickListener` from receiving events
866    ([#5433](https://github.com/google/ExoPlayer/issues/5433)).
867*   IMA extension: Upgrade IMA dependency to 3.10.6.
868*   Cronet extension: Upgrade Cronet dependency to 71.3578.98.
869*   OkHttp extension: Upgrade OkHttp dependency to 3.12.1.
870*   MP3: Wider fix for issue where streams would play twice on some Samsung
871    devices ([#4519](https://github.com/google/ExoPlayer/issues/4519)).
872
873### 2.9.4 (2019-01-15)
874
875*   IMA extension: Clear ads loader listeners on release
876    ([#4114](https://github.com/google/ExoPlayer/issues/4114)).
877*   SmoothStreaming: Fix support for subtitles in DRM protected streams
878    ([#5378](https://github.com/google/ExoPlayer/issues/5378)).
879*   FFmpeg extension: Treat invalid data errors as non-fatal to match the
880    behavior of MediaCodec
881    ([#5293](https://github.com/google/ExoPlayer/issues/5293)).
882*   GVR extension: upgrade GVR SDK dependency to 1.190.0.
883*   Associate fatal player errors of type SOURCE with the loading source in
884    `AnalyticsListener.EventTime`
885    ([#5407](https://github.com/google/ExoPlayer/issues/5407)).
886*   Add `startPositionUs` to `MediaSource.createPeriod`. This fixes an issue
887    where using lazy preparation in `ConcatenatingMediaSource` with an
888    `ExtractorMediaSource` overrides initial seek positions
889    ([#5350](https://github.com/google/ExoPlayer/issues/5350)).
890*   Add subtext to the `MediaDescriptionAdapter` of the
891    `PlayerNotificationManager`.
892*   Add workaround for video quality problems with Amlogic decoders
893    ([#5003](https://github.com/google/ExoPlayer/issues/5003)).
894*   Fix issue where sending callbacks for playlist changes may cause problems
895    because of parallel player access
896    ([#5240](https://github.com/google/ExoPlayer/issues/5240)).
897*   Fix issue with reusing a `ClippingMediaSource` with an inner
898    `ExtractorMediaSource` and a non-zero start position
899    ([#5351](https://github.com/google/ExoPlayer/issues/5351)).
900*   Fix issue where uneven track durations in MP4 streams can cause OOM problems
901    ([#3670](https://github.com/google/ExoPlayer/issues/3670)).
902
903### 2.9.3 (2018-12-20)
904
905*   Captions: Support PNG subtitles in SMPTE-TT
906    ([#1583](https://github.com/google/ExoPlayer/issues/1583)).
907*   MPEG-TS: Use random access indicators to minimize the need for
908    `FLAG_ALLOW_NON_IDR_KEYFRAMES`.
909*   Downloading: Reduce time taken to remove downloads
910    ([#5136](https://github.com/google/ExoPlayer/issues/5136)).
911*   MP3:
912    *   Use the true bitrate for constant-bitrate MP3 seeking.
913    *   Fix issue where streams would play twice on some Samsung devices
914        ([#4519](https://github.com/google/ExoPlayer/issues/4519)).
915*   Fix regression where some audio formats were incorrectly marked as being
916    unplayable due to under-reporting of platform decoder capabilities
917    ([#5145](https://github.com/google/ExoPlayer/issues/5145)).
918*   Fix decode-only frame skipping on Nvidia Shield TV devices.
919*   Workaround for MiTV (dangal) issue when swapping output surface
920    ([#5169](https://github.com/google/ExoPlayer/issues/5169)).
921
922### 2.9.2 (2018-11-28)
923
924*   HLS:
925    *   Fix issue causing unnecessary media playlist requests when playing live
926        streams ([#5059](https://github.com/google/ExoPlayer/issues/5059)).
927    *   Fix decoder re-instantiation issue for packed audio streams
928        ([#5063](https://github.com/google/ExoPlayer/issues/5063)).
929*   MP4: Support Opus and FLAC in the MP4 container, and in DASH
930    ([#4883](https://github.com/google/ExoPlayer/issues/4883)).
931*   DASH: Fix detecting the end of live events
932    ([#4780](https://github.com/google/ExoPlayer/issues/4780)).
933*   Spherical video: Fall back to `TYPE_ROTATION_VECTOR` if
934    `TYPE_GAME_ROTATION_VECTOR` is unavailable
935    ([#5119](https://github.com/google/ExoPlayer/issues/5119)).
936*   Support seeking for a wider range of MPEG-TS streams
937    ([#5097](https://github.com/google/ExoPlayer/issues/5097)).
938*   Include channel count in audio capabilities check
939    ([#4690](https://github.com/google/ExoPlayer/issues/4690)).
940*   Fix issue with applying the `show_buffering` attribute in `PlayerView`
941    ([#5139](https://github.com/google/ExoPlayer/issues/5139)).
942*   Fix issue where null `Metadata` was output when it failed to decode
943    ([#5149](https://github.com/google/ExoPlayer/issues/5149)).
944*   Fix playback of some invalid but playable MP4 streams by replacing
945    assertions with logged warnings in sample table parsing code
946    ([#5162](https://github.com/google/ExoPlayer/issues/5162)).
947*   Fix UUID passed to `MediaCrypto` when using `C.CLEARKEY_UUID` before API 27.
948
949### 2.9.1 (2018-11-01)
950
951*   Add convenience methods `Player.next`, `Player.previous`, `Player.hasNext`
952    and `Player.hasPrevious`
953    ([#4863](https://github.com/google/ExoPlayer/issues/4863)).
954*   Improve initial bandwidth meter estimates using the current country and
955    network type.
956*   IMA extension:
957    *   For preroll to live stream transitions, project forward the loading
958        position to avoid being behind the live window.
959    *   Let apps specify whether to focus the skip button on ATV
960        ([#5019](https://github.com/google/ExoPlayer/issues/5019)).
961*   MP3:
962    *   Support seeking based on MLLT metadata
963        ([#3241](https://github.com/google/ExoPlayer/issues/3241)).
964    *   Fix handling of streams with appended data
965        ([#4954](https://github.com/google/ExoPlayer/issues/4954)).
966*   DASH: Parse ProgramInformation element if present in the manifest.
967*   HLS:
968    *   Add constructor to `DefaultHlsExtractorFactory` for adding TS payload
969        reader factory flags
970        ([#4861](https://github.com/google/ExoPlayer/issues/4861)).
971    *   Fix bug in segment sniffing
972        ([#5039](https://github.com/google/ExoPlayer/issues/5039)).
973*   SubRip: Add support for alignment tags, and remove tags from the displayed
974    captions ([#4306](https://github.com/google/ExoPlayer/issues/4306)).
975*   Fix issue with blind seeking to windows with non-zero offset in a
976    `ConcatenatingMediaSource`
977    ([#4873](https://github.com/google/ExoPlayer/issues/4873)).
978*   Fix logic for enabling next and previous actions in `TimelineQueueNavigator`
979    ([#5065](https://github.com/google/ExoPlayer/issues/5065)).
980*   Fix issue where audio focus handling could not be disabled after enabling it
981    ([#5055](https://github.com/google/ExoPlayer/issues/5055)).
982*   Fix issue where subtitles were positioned incorrectly if `SubtitleView` had
983    a non-zero position offset to its parent
984    ([#4788](https://github.com/google/ExoPlayer/issues/4788)).
985*   Fix issue where the buffered position was not updated correctly when
986    transitioning between periods
987    ([#4899](https://github.com/google/ExoPlayer/issues/4899)).
988*   Fix issue where a `NullPointerException` is thrown when removing an
989    unprepared media source from a `ConcatenatingMediaSource` with the
990    `useLazyPreparation` option enabled
991    ([#4986](https://github.com/google/ExoPlayer/issues/4986)).
992*   Work around an issue where a non-empty end-of-stream audio buffer would be
993    output with timestamp zero, causing the player position to jump backwards
994    ([#5045](https://github.com/google/ExoPlayer/issues/5045)).
995*   Suppress a spurious assertion failure on some Samsung devices
996    ([#4532](https://github.com/google/ExoPlayer/issues/4532)).
997*   Suppress spurious "references unknown class member" shrinking warning
998    ([#4890](https://github.com/google/ExoPlayer/issues/4890)).
999*   Swap recommended order for google() and jcenter() in gradle config
1000    ([#4997](https://github.com/google/ExoPlayer/issues/4997)).
1001
1002### 2.9.0 (2018-09-06)
1003
1004*   Turn on Java 8 compiler support for the ExoPlayer library. Apps may need to
1005    add `compileOptions { targetCompatibility JavaVersion.VERSION_1_8 }` to
1006    their gradle settings to ensure bytecode compatibility.
1007*   Set `compileSdkVersion` and `targetSdkVersion` to 28.
1008*   Support for automatic audio focus handling via
1009    `SimpleExoPlayer.setAudioAttributes`.
1010*   Add `ExoPlayer.retry` convenience method.
1011*   Add `AudioListener` for listening to changes in audio configuration during
1012    playback ([#3994](https://github.com/google/ExoPlayer/issues/3994)).
1013*   Add `LoadErrorHandlingPolicy` to allow configuration of load error handling
1014    across `MediaSource` implementations
1015    ([#3370](https://github.com/google/ExoPlayer/issues/3370)).
1016*   Allow passing a `Looper`, which specifies the thread that must be used to
1017    access the player, when instantiating player instances using
1018    `ExoPlayerFactory`
1019    ([#4278](https://github.com/google/ExoPlayer/issues/4278)).
1020*   Allow setting log level for ExoPlayer logcat output
1021    ([#4665](https://github.com/google/ExoPlayer/issues/4665)).
1022*   Simplify `BandwidthMeter` injection: The `BandwidthMeter` should now be
1023    passed directly to `ExoPlayerFactory`, instead of to
1024    `TrackSelection.Factory` and `DataSource.Factory`. The `BandwidthMeter` is
1025    passed to the components that need it internally. The `BandwidthMeter` may
1026    also be omitted, in which case a default instance will be used.
1027*   Spherical video:
1028    *   Support for spherical video by setting `surface_type="spherical_view"`
1029        on `PlayerView`.
1030    *   Support for
1031        [VR180](https://github.com/google/spatial-media/blob/master/docs/vr180.md).
1032*   HLS:
1033    *   Support PlayReady.
1034    *   Add container format sniffing
1035        ([#2025](https://github.com/google/ExoPlayer/issues/2025)).
1036    *   Support alternative `EXT-X-KEY` tags.
1037    *   Support `EXT-X-INDEPENDENT-SEGMENTS` in the master playlist.
1038    *   Support variable substitution
1039        ([#4422](https://github.com/google/ExoPlayer/issues/4422)).
1040    *   Fix the bitrate being unset on primary track sample formats
1041        ([#3297](https://github.com/google/ExoPlayer/issues/3297)).
1042    *   Make `HlsMediaSource.Factory` take a factory of trackers instead of a
1043        tracker instance
1044        ([#4814](https://github.com/google/ExoPlayer/issues/4814)).
1045*   DASH:
1046    *   Support `messageData` attribute for in-manifest event streams.
1047    *   Clip periods to their specified durations
1048        ([#4185](https://github.com/google/ExoPlayer/issues/4185)).
1049*   Improve seeking support for progressive streams:
1050    *   Support seeking in MPEG-TS
1051        ([#966](https://github.com/google/ExoPlayer/issues/966)).
1052    *   Support seeking in MPEG-PS
1053        ([#4476](https://github.com/google/ExoPlayer/issues/4476)).
1054    *   Support approximate seeking in ADTS using a constant bitrate assumption
1055        ([#4548](https://github.com/google/ExoPlayer/issues/4548)). The
1056        `FLAG_ENABLE_CONSTANT_BITRATE_SEEKING` flag must be set on the extractor
1057        to enable this functionality.
1058    *   Support approximate seeking in AMR using a constant bitrate assumption.
1059        The `FLAG_ENABLE_CONSTANT_BITRATE_SEEKING` flag must be set on the
1060        extractor to enable this functionality.
1061    *   Add `DefaultExtractorsFactory.setConstantBitrateSeekingEnabled` to
1062        enable approximate seeking using a constant bitrate assumption on all
1063        extractors that support it.
1064*   Video:
1065    *   Add callback to `VideoListener` to notify of surface size changes.
1066    *   Improve performance when playing high frame-rate content, and when
1067        playing at greater than 1x speed
1068        ([#2777](https://github.com/google/ExoPlayer/issues/2777)).
1069    *   Scale up the initial video decoder maximum input size so playlist
1070        transitions with small increases in maximum sample size do not require
1071        reinitialization
1072        ([#4510](https://github.com/google/ExoPlayer/issues/4510)).
1073    *   Fix a bug where the player would not transition to the ended state when
1074        playing video in tunneled mode.
1075*   Audio:
1076    *   Support attaching auxiliary audio effects to the `AudioTrack` via
1077        `Player.setAuxEffectInfo` and `Player.clearAuxEffectInfo`.
1078    *   Support seamless adaptation while playing xHE-AAC streams.
1079        ([#4360](https://github.com/google/ExoPlayer/issues/4360)).
1080    *   Increase `AudioTrack` buffer sizes to the theoretical maximum required
1081        for each encoding for passthrough playbacks
1082        ([#3803](https://github.com/google/ExoPlayer/issues/3803)).
1083    *   WAV: Fix issue where white noise would be output at the end of playback
1084        ([#4724](https://github.com/google/ExoPlayer/issues/4724)).
1085    *   MP3: Fix issue where streams would play twice on the SM-T530
1086        ([#4519](https://github.com/google/ExoPlayer/issues/4519)).
1087*   Analytics:
1088    *   Add callbacks to `DefaultDrmSessionEventListener` and
1089        `AnalyticsListener` to be notified of acquired and released DRM
1090        sessions.
1091    *   Add uri field to `LoadEventInfo` in `MediaSourceEventListener` and
1092        `AnalyticsListener` callbacks. This uri is the redirected uri if
1093        redirection occurred
1094        ([#2054](https://github.com/google/ExoPlayer/issues/2054)).
1095    *   Add response headers field to `LoadEventInfo` in
1096        `MediaSourceEventListener` and `AnalyticsListener` callbacks
1097        ([#4361](https://github.com/google/ExoPlayer/issues/4361) and
1098        [#4615](https://github.com/google/ExoPlayer/issues/4615)).
1099*   UI:
1100    *   Add option to `PlayerView` to show buffering view when playWhenReady is
1101        false ([#4304](https://github.com/google/ExoPlayer/issues/4304)).
1102    *   Allow any `Drawable` to be used as `PlayerView` default artwork.
1103*   ConcatenatingMediaSource:
1104    *   Support lazy preparation of playlist media sources
1105        ([#3972](https://github.com/google/ExoPlayer/issues/3972)).
1106    *   Support range removal with `removeMediaSourceRange` methods
1107        ([#4542](https://github.com/google/ExoPlayer/issues/4542)).
1108    *   Support setting a new shuffle order with `setShuffleOrder`
1109        ([#4791](https://github.com/google/ExoPlayer/issues/4791)).
1110*   MPEG-TS: Support CEA-608/708 in H262
1111    ([#2565](https://github.com/google/ExoPlayer/issues/2565)).
1112*   Allow configuration of the back buffer in `DefaultLoadControl.Builder`
1113    ([#4857](https://github.com/google/ExoPlayer/issues/4857)).
1114*   Allow apps to pass a `CacheKeyFactory` for setting custom cache keys when
1115    creating a `CacheDataSource`.
1116*   Provide additional information for adaptive track selection.
1117    `TrackSelection.updateSelectedTrack` has two new parameters for the current
1118    queue of media chunks and iterators for information about upcoming chunks.
1119*   Allow `MediaCodecSelector`s to return multiple compatible decoders for
1120    `MediaCodecRenderer`, and provide an (optional) `MediaCodecSelector` that
1121    falls back to less preferred decoders like `MediaCodec.createDecoderByType`
1122    ([#273](https://github.com/google/ExoPlayer/issues/273)).
1123*   Enable gzip for requests made by `SingleSampleMediaSource`
1124    ([#4771](https://github.com/google/ExoPlayer/issues/4771)).
1125*   Fix bug reporting buffered position for multi-period windows, and add
1126    convenience methods `Player.getTotalBufferedDuration` and
1127    `Player.getContentBufferedDuration`
1128    ([#4023](https://github.com/google/ExoPlayer/issues/4023)).
1129*   Fix bug where transitions to clipped media sources would happen too early
1130    ([#4583](https://github.com/google/ExoPlayer/issues/4583)).
1131*   Fix bugs reporting events for multi-period media sources
1132    ([#4492](https://github.com/google/ExoPlayer/issues/4492) and
1133    [#4634](https://github.com/google/ExoPlayer/issues/4634)).
1134*   Fix issue where removing looping media from a playlist throws an exception
1135    ([#4871](https://github.com/google/ExoPlayer/issues/4871).
1136*   Fix issue where the preferred audio or text track would not be selected if
1137    mapped onto a secondary renderer of the corresponding type
1138    ([#4711](http://github.com/google/ExoPlayer/issues/4711)).
1139*   Fix issue where errors of upcoming playlist items are thrown too early
1140    ([#4661](https://github.com/google/ExoPlayer/issues/4661)).
1141*   Allow edit lists which do not start with a sync sample.
1142    ([#4774](https://github.com/google/ExoPlayer/issues/4774)).
1143*   Fix issue with audio discontinuities at period transitions, e.g. when
1144    looping ([#3829](https://github.com/google/ExoPlayer/issues/3829)).
1145*   Fix issue where `player.getCurrentTag()` throws an
1146    `IndexOutOfBoundsException`
1147    ([#4822](https://github.com/google/ExoPlayer/issues/4822)).
1148*   Fix bug preventing use of multiple key session support (`multiSession=true`)
1149    for non-Widevine `DefaultDrmSessionManager` instances
1150    ([#4834](https://github.com/google/ExoPlayer/issues/4834)).
1151*   Fix issue where audio and video would desynchronize when playing
1152    concatenations of gapless content
1153    ([#4559](https://github.com/google/ExoPlayer/issues/4559)).
1154*   IMA extension:
1155    *   Refine the previous fix for empty ad groups to avoid discarding ad
1156        breaks unnecessarily
1157        ([#4030](https://github.com/google/ExoPlayer/issues/4030) and
1158        [#4280](https://github.com/google/ExoPlayer/issues/4280)).
1159    *   Fix handling of empty postrolls
1160        ([#4681](https://github.com/google/ExoPlayer/issues/4681)).
1161    *   Fix handling of postrolls with multiple ads
1162        ([#4710](https://github.com/google/ExoPlayer/issues/4710)).
1163*   MediaSession extension:
1164    *   Add `MediaSessionConnector.setCustomErrorMessage` to support setting
1165        custom error messages.
1166    *   Add `MediaMetadataProvider` to support setting custom metadata
1167        ([#3497](https://github.com/google/ExoPlayer/issues/3497)).
1168*   Cronet extension: Now distributed via jCenter.
1169*   FFmpeg extension: Support mu-law and A-law PCM.
1170
1171### 2.8.4 (2018-08-17)
1172
1173*   IMA extension: Improve handling of consecutive empty ad groups
1174    ([#4030](https://github.com/google/ExoPlayer/issues/4030)),
1175    ([#4280](https://github.com/google/ExoPlayer/issues/4280)).
1176
1177### 2.8.3 (2018-07-23)
1178
1179*   IMA extension:
1180    *   Fix behavior when creating/releasing the player then releasing
1181        `ImaAdsLoader`
1182        ([#3879](https://github.com/google/ExoPlayer/issues/3879)).
1183    *   Add support for setting slots for companion ads.
1184*   Captions:
1185    *   TTML: Fix an issue with TTML using font size as % of cell resolution
1186        that makes `SubtitleView.setApplyEmbeddedFontSizes()` not work
1187        correctly. ([#4491](https://github.com/google/ExoPlayer/issues/4491)).
1188    *   CEA-608: Improve handling of embedded styles
1189        ([#4321](https://github.com/google/ExoPlayer/issues/4321)).
1190*   DASH:
1191    *   Exclude text streams from duration calculations
1192        ([#4029](https://github.com/google/ExoPlayer/issues/4029)).
1193    *   Fix freezing when playing multi-period manifests with `EventStream`s
1194        ([#4492](https://github.com/google/ExoPlayer/issues/4492)).
1195*   DRM: Allow DrmInitData to carry a license server URL
1196    ([#3393](https://github.com/google/ExoPlayer/issues/3393)).
1197*   MPEG-TS: Fix bug preventing SCTE-35 cues from being output
1198    ([#4573](https://github.com/google/ExoPlayer/issues/4573)).
1199*   Expose all internal ID3 data stored in MP4 udta boxes, and switch from using
1200    CommentFrame to InternalFrame for frames with gapless metadata in MP4.
1201*   Add `PlayerView.isControllerVisible`
1202    ([#4385](https://github.com/google/ExoPlayer/issues/4385)).
1203*   Fix issue playing DRM protected streams on Asus Zenfone 2
1204    ([#4403](https://github.com/google/ExoPlayer/issues/4413)).
1205*   Add support for multiple audio and video tracks in MPEG-PS streams
1206    ([#4406](https://github.com/google/ExoPlayer/issues/4406)).
1207*   Add workaround for track index mismatches between trex and tkhd boxes in
1208    fragmented MP4 files
1209    ([#4477](https://github.com/google/ExoPlayer/issues/4477)).
1210*   Add workaround for track index mismatches between tfhd and tkhd boxes in
1211    fragmented MP4 files
1212    ([#4083](https://github.com/google/ExoPlayer/issues/4083)).
1213*   Ignore all MP4 edit lists if one edit list couldn't be handled
1214    ([#4348](https://github.com/google/ExoPlayer/issues/4348)).
1215*   Fix issue when switching track selection from an embedded track to a primary
1216    track in DASH ([#4477](https://github.com/google/ExoPlayer/issues/4477)).
1217*   Fix accessibility class name for `DefaultTimeBar`
1218    ([#4611](https://github.com/google/ExoPlayer/issues/4611)).
1219*   Improved compatibility with FireOS devices.
1220
1221### 2.8.2 (2018-06-06)
1222
1223*   IMA extension: Don't advertise support for video/mpeg ad media, as we don't
1224    have an extractor for this
1225    ([#4297](https://github.com/google/ExoPlayer/issues/4297)).
1226*   DASH: Fix playback getting stuck when playing representations that have both
1227    sidx atoms and non-zero presentationTimeOffset values.
1228*   HLS:
1229    *   Allow injection of custom playlist trackers.
1230    *   Fix adaptation in live playlists with EXT-X-PROGRAM-DATE-TIME tags.
1231*   Mitigate memory leaks when `MediaSource` loads are slow to cancel
1232    ([#4249](https://github.com/google/ExoPlayer/issues/4249)).
1233*   Fix inconsistent `Player.EventListener` invocations for recursive player
1234    state changes ([#4276](https://github.com/google/ExoPlayer/issues/4276)).
1235*   Fix `MediaCodec.native_setSurface` crash on Moto C
1236    ([#4315](https://github.com/google/ExoPlayer/issues/4315)).
1237*   Fix missing whitespace in CEA-608
1238    ([#3906](https://github.com/google/ExoPlayer/issues/3906)).
1239*   Fix crash downloading HLS media playlists
1240    ([#4396](https://github.com/google/ExoPlayer/issues/4396)).
1241*   Fix a bug where download cancellation was ignored
1242    ([#4403](https://github.com/google/ExoPlayer/issues/4403)).
1243*   Set `METADATA_KEY_TITLE` on media descriptions
1244    ([#4292](https://github.com/google/ExoPlayer/issues/4292)).
1245*   Allow apps to register custom MIME types
1246    ([#4264](https://github.com/google/ExoPlayer/issues/4264)).
1247
1248### 2.8.1 (2018-05-22)
1249
1250*   HLS:
1251    *   Fix playback of livestreams with EXT-X-PROGRAM-DATE-TIME tags
1252        ([#4239](https://github.com/google/ExoPlayer/issues/4239)).
1253    *   Fix playback of clipped streams starting from non-keyframe positions
1254        ([#4241](https://github.com/google/ExoPlayer/issues/4241)).
1255*   OkHttp extension: Fix to correctly include response headers in thrown
1256    `InvalidResponseCodeException`s.
1257*   Add possibility to cancel `PlayerMessage`s.
1258*   UI:
1259    *   Add `PlayerView.setKeepContentOnPlayerReset` to keep the currently
1260        displayed video frame or media artwork visible when the player is reset
1261        ([#2843](https://github.com/google/ExoPlayer/issues/2843)).
1262*   Fix crash when switching surface on Moto E(4)
1263    ([#4134](https://github.com/google/ExoPlayer/issues/4134)).
1264*   Fix a bug that could cause event listeners to be called with inconsistent
1265    information if an event listener interacted with the player
1266    ([#4262](https://github.com/google/ExoPlayer/issues/4262)).
1267*   Audio:
1268    *   Fix extraction of PCM in MP4/MOV
1269        ([#4228](https://github.com/google/ExoPlayer/issues/4228)).
1270    *   FLAC: Supports seeking for FLAC files without SEEKTABLE
1271        ([#1808](https://github.com/google/ExoPlayer/issues/1808)).
1272*   Captions:
1273    *   TTML:
1274    *   Fix a styling issue when there are multiple regions displayed at the
1275        same time that can make text size of each region much smaller than
1276        defined.
1277    *   Fix an issue when the caption line has no text (empty line or only line
1278        break), and the line's background is still displayed.
1279    *   Support TTML font size using % correctly (as percentage of document cell
1280        resolution).
1281
1282### 2.8.0 (2018-05-03)
1283
1284*   Downloading:
1285    *   Add `DownloadService`, `DownloadManager` and related classes
1286        ([#2643](https://github.com/google/ExoPlayer/issues/2643)). Information
1287        on using these components to download progressive formats can be found
1288        [here](https://medium.com/google-exoplayer/downloading-streams-6d259eec7f95).
1289        To see how to download DASH, HLS and SmoothStreaming media, take a look
1290        at the app.
1291    *   Updated main demo app to support downloading DASH, HLS, SmoothStreaming
1292        and progressive media.
1293*   MediaSources:
1294    *   Allow reusing media sources after they have been released and also in
1295        parallel to allow adding them multiple times to a concatenation.
1296        ([#3498](https://github.com/google/ExoPlayer/issues/3498)).
1297    *   Merged `DynamicConcatenatingMediaSource` into `ConcatenatingMediaSource`
1298        and deprecated `DynamicConcatenatingMediaSource`.
1299    *   Allow clipping of child media sources where the period and window have a
1300        non-zero offset with `ClippingMediaSource`.
1301    *   Allow adding and removing `MediaSourceEventListener`s to MediaSources
1302        after they have been created. Listening to events is now supported for
1303        all media sources including composite sources.
1304    *   Added callbacks to `MediaSourceEventListener` to get notified when media
1305        periods are created, released and being read from.
1306    *   Support live stream clipping with `ClippingMediaSource`.
1307    *   Allow setting tags for all media sources in their factories. The tag of
1308        the current window can be retrieved with `Player.getCurrentTag`.
1309*   UI:
1310    *   Add support for displaying error messages and a buffering spinner in
1311        `PlayerView`.
1312    *   Add support for listening to `AspectRatioFrameLayout`'s aspect ratio
1313        update ([#3736](https://github.com/google/ExoPlayer/issues/3736)).
1314    *   Add `PlayerNotificationManager` for displaying notifications reflecting
1315        the player state.
1316    *   Add `TrackSelectionView` for selecting tracks with
1317        `DefaultTrackSelector`.
1318    *   Add `TrackNameProvider` for converting track `Format`s to textual
1319        descriptions, and `DefaultTrackNameProvider` as a default
1320        implementation.
1321*   Track selection:
1322    *   Reworked `MappingTrackSelector` and `DefaultTrackSelector`.
1323    *   `DefaultTrackSelector.Parameters` now implements `Parcelable`.
1324    *   Added UI components for track selection (see above).
1325*   Audio:
1326    *   Support extracting data from AMR container formats, including both
1327        narrow and wide band
1328        ([#2527](https://github.com/google/ExoPlayer/issues/2527)).
1329    *   FLAC:
1330    *   Sniff FLAC files correctly if they have ID3 headers
1331        ([#4055](https://github.com/google/ExoPlayer/issues/4055)).
1332    *   Supports FLAC files with high sample rate (176400 and 192000)
1333        ([#3769](https://github.com/google/ExoPlayer/issues/3769)).
1334    *   Factor out `AudioTrack` position tracking from `DefaultAudioSink`.
1335    *   Fix an issue where the playback position would pause just after playback
1336        begins, and poll the audio timestamp less frequently once it starts
1337        advancing ([#3841](https://github.com/google/ExoPlayer/issues/3841)).
1338    *   Add an option to skip silent audio in `PlaybackParameters`
1339        ([#2635](https://github.com/google/ExoPlayer/issues/2635)).
1340    *   Fix an issue where playback of TrueHD streams would get stuck after
1341        seeking due to not finding a syncframe
1342        ([#3845](https://github.com/google/ExoPlayer/issues/3845)).
1343    *   Fix an issue with eac3-joc playback where a codec would fail to
1344        configure ([#4165](https://github.com/google/ExoPlayer/issues/4165)).
1345    *   Handle non-empty end-of-stream buffers, to fix gapless playback of
1346        streams with encoder padding when the decoder returns a non-empty final
1347        buffer.
1348    *   Allow trimming more than one sample when applying an elst audio edit via
1349        gapless playback info.
1350    *   Allow overriding skipping/scaling with custom `AudioProcessor`s
1351        ([#3142](https://github.com/google/ExoPlayer/issues/3142)).
1352*   Caching:
1353    *   Add release method to the `Cache` interface, and prevent multiple
1354        instances of `SimpleCache` using the same folder at the same time.
1355    *   Cache redirect URLs
1356        ([#2360](https://github.com/google/ExoPlayer/issues/2360)).
1357*   DRM:
1358    *   Allow multiple listeners for `DefaultDrmSessionManager`.
1359    *   Pass `DrmSessionManager` to `ExoPlayerFactory` instead of
1360        `RendererFactory`.
1361    *   Change minimum API requirement for CBC and pattern encryption from 24 to
1362        25 ([#4022](https://github.com/google/ExoPlayer/issues/4022)).
1363    *   Fix handling of 307/308 redirects when making license requests
1364        ([#4108](https://github.com/google/ExoPlayer/issues/4108)).
1365*   HLS:
1366    *   Fix playlist loading error propagation when the current selection does
1367        not include all of the playlist's variants.
1368    *   Fix SAMPLE-AES-CENC and SAMPLE-AES-CTR EXT-X-KEY methods
1369        ([#4145](https://github.com/google/ExoPlayer/issues/4145)).
1370    *   Preeptively declare an ID3 track in chunkless preparation
1371        ([#4016](https://github.com/google/ExoPlayer/issues/4016)).
1372    *   Add support for multiple #EXT-X-MAP tags in a media playlist
1373        ([#4164](https://github.com/google/ExoPlayer/issues/4182)).
1374    *   Fix seeking in live streams
1375        ([#4187](https://github.com/google/ExoPlayer/issues/4187)).
1376*   IMA extension:
1377    *   Allow setting the ad media load timeout
1378        ([#3691](https://github.com/google/ExoPlayer/issues/3691)).
1379    *   Expose ad load errors via `MediaSourceEventListener` on
1380        `AdsMediaSource`, and allow setting an ad event listener on
1381        `ImaAdsLoader`. Deprecate the `AdsMediaSource.EventListener`.
1382*   Add `AnalyticsListener` interface which can be registered in
1383    `SimpleExoPlayer` to receive detailed metadata for each ExoPlayer event.
1384*   Optimize seeking in FMP4 by enabling seeking to the nearest sync sample
1385    within a fragment. This benefits standalone FMP4 playbacks, DASH and
1386    SmoothStreaming.
1387*   Updated default max buffer length in `DefaultLoadControl`.
1388*   Fix ClearKey decryption error if the key contains a forward slash
1389    ([#4075](https://github.com/google/ExoPlayer/issues/4075)).
1390*   Fix crash when switching surface on Huawei P9 Lite
1391    ([#4084](https://github.com/google/ExoPlayer/issues/4084)), and Philips
1392    QM163E ([#4104](https://github.com/google/ExoPlayer/issues/4104)).
1393*   Support ZLIB compressed PGS subtitles.
1394*   Added `getPlaybackError` to `Player` interface.
1395*   Moved initial bitrate estimate from `AdaptiveTrackSelection` to
1396    `DefaultBandwidthMeter`.
1397*   Removed default renderer time offset of 60000000 from internal player. The
1398    actual renderer timestamp offset can be obtained by listening to
1399    `BaseRenderer.onStreamChanged`.
1400*   Added dependencies on checkerframework annotations for static code analysis.
1401
1402### 2.7.3 (2018-04-04)
1403
1404*   Fix ProGuard configuration for Cast, IMA and OkHttp extensions.
1405*   Update OkHttp extension to depend on OkHttp 3.10.0.
1406
1407### 2.7.2 (2018-03-29)
1408
1409*   Gradle: Upgrade Gradle version from 4.1 to 4.4 so it can work with Android
1410    Studio 3.1 ([#3708](https://github.com/google/ExoPlayer/issues/3708)).
1411*   Match codecs starting with "mp4a" to different Audio MimeTypes
1412    ([#3779](https://github.com/google/ExoPlayer/issues/3779)).
1413*   Fix ANR issue on Redmi 4X and Redmi Note 4
1414    ([#4006](https://github.com/google/ExoPlayer/issues/4006)).
1415*   Fix handling of zero padded strings when parsing Matroska streams
1416    ([#4010](https://github.com/google/ExoPlayer/issues/4010)).
1417*   Fix "Decoder input buffer too small" error when playing some FLAC streams.
1418*   MediaSession extension: Omit fast forward and rewind actions when media is
1419    not seekable ([#4001](https://github.com/google/ExoPlayer/issues/4001)).
1420
1421### 2.7.1 (2018-03-09)
1422
1423*   Gradle: Replaced 'compile' (deprecated) with 'implementation' and 'api'.
1424    This may lead to build breakage for applications upgrading from previous
1425    version that rely on indirect dependencies of certain modules. In such
1426    cases, application developers need to add the missing dependency to their
1427    gradle file. You can read more about the new dependency configurations
1428    [here](https://developer.android.com/studio/build/gradle-plugin-3-0-0-migration.html#new_configurations).
1429*   HlsMediaSource: Make HLS periods start at zero instead of the epoch.
1430    Applications that rely on HLS timelines having a period starting at the
1431    epoch will need to update their handling of HLS timelines. The program date
1432    time is still available via the informational
1433    `Timeline.Window.windowStartTimeMs` field
1434    ([#3865](https://github.com/google/ExoPlayer/issues/3865),
1435    [#3888](https://github.com/google/ExoPlayer/issues/3888)).
1436*   Enable seeking in MP4 streams where duration is set incorrectly in the track
1437    header ([#3926](https://github.com/google/ExoPlayer/issues/3926)).
1438*   Video: Force rendering a frame periodically in `MediaCodecVideoRenderer` and
1439    `LibvpxVideoRenderer`, even if it is late.
1440
1441### 2.7.0 (2018-02-19)
1442
1443*   Player interface:
1444    *   Add optional parameter to `stop` to reset the player when stopping.
1445    *   Add a reason to `EventListener.onTimelineChanged` to distinguish between
1446        initial preparation, reset and dynamic updates.
1447    *   Add `Player.DISCONTINUITY_REASON_AD_INSERTION` to the possible reasons
1448        reported in `Eventlistener.onPositionDiscontinuity` to distinguish
1449        transitions to and from ads within one period from transitions between
1450        periods.
1451    *   Replaced `ExoPlayer.sendMessages` with `ExoPlayer.createMessage` to
1452        allow more customization of the message. Now supports setting a message
1453        delivery playback position and/or a delivery handler
1454        ([#2189](https://github.com/google/ExoPlayer/issues/2189)).
1455    *   Add `Player.VideoComponent`, `Player.TextComponent` and
1456        `Player.MetadataComponent` interfaces that define optional video, text
1457        and metadata output functionality. New `getVideoComponent`,
1458        `getTextComponent` and `getMetadataComponent` methods provide access to
1459        this functionality.
1460*   Add `ExoPlayer.setSeekParameters` for controlling how seek operations are
1461    performed. The `SeekParameters` class contains defaults for exact seeking
1462    and seeking to the closest sync points before, either side or after
1463    specified seek positions. `SeekParameters` are not currently supported when
1464    playing HLS streams.
1465*   DefaultTrackSelector:
1466    *   Replace `DefaultTrackSelector.Parameters` copy methods with a builder.
1467    *   Support disabling of individual text track selection flags.
1468*   Buffering:
1469    *   Allow a back-buffer of media to be retained behind the current playback
1470        position, for fast backward seeking. The back-buffer can be configured
1471        by custom `LoadControl` implementations.
1472    *   Add ability for `SequenceableLoader` to re-evaluate its buffer and
1473        discard buffered media so that it can be re-buffered in a different
1474        quality.
1475    *   Allow more flexible loading strategy when playing media containing
1476        multiple sub-streams, by allowing injection of custom
1477        `CompositeSequenceableLoader` factories through
1478        `DashMediaSource.Factory`, `HlsMediaSource.Factory`,
1479        `SsMediaSource.Factory`, and `MergingMediaSource`.
1480    *   Play out existing buffer before retrying for progressive live streams
1481        ([#1606](https://github.com/google/ExoPlayer/issues/1606)).
1482*   UI:
1483    *   Generalized player and control views to allow them to bind with any
1484        `Player`, and renamed them to `PlayerView` and `PlayerControlView`
1485        respectively.
1486    *   Made `PlayerView` automatically apply video rotation when configured to
1487        use `TextureView`
1488        ([#91](https://github.com/google/ExoPlayer/issues/91)).
1489    *   Made `PlayerView` play button behave correctly when the player is ended
1490        ([#3689](https://github.com/google/ExoPlayer/issues/3689)), and call a
1491        `PlaybackPreparer` when the player is idle.
1492*   DRM: Optimistically attempt playback of DRM protected content that does not
1493    declare scheme specific init data in the manifest. If playback of clear
1494    samples without keys is allowed, delay DRM session error propagation until
1495    keys are actually needed
1496    ([#3630](https://github.com/google/ExoPlayer/issues/3630)).
1497*   DASH:
1498    *   Support in-band Emsg events targeting the player with scheme id
1499        `urn:mpeg:dash:event:2012` and scheme values "1", "2" and "3".
1500    *   Support EventStream elements in DASH manifests.
1501*   HLS:
1502    *   Add opt-in support for chunkless preparation in HLS. This allows an HLS
1503        source to finish preparation without downloading any chunks, which can
1504        significantly reduce initial buffering time
1505        ([#3149](https://github.com/google/ExoPlayer/issues/3149)). More details
1506        can be found
1507        [here](https://medium.com/google-exoplayer/faster-hls-preparation-f6611aa15ea6).
1508    *   Fail if unable to sync with the Transport Stream, rather than entering
1509        stuck in an indefinite buffering state.
1510    *   Fix mime type propagation
1511        ([#3653](https://github.com/google/ExoPlayer/issues/3653)).
1512    *   Fix ID3 context reuse across segment format changes
1513        ([#3622](https://github.com/google/ExoPlayer/issues/3622)).
1514    *   Use long for media sequence numbers
1515        ([#3747](https://github.com/google/ExoPlayer/issues/3747))
1516    *   Add initial support for the EXT-X-GAP tag.
1517*   Audio:
1518    *   Support TrueHD passthrough for rechunked samples in Matroska files
1519        ([#2147](https://github.com/google/ExoPlayer/issues/2147)).
1520    *   Support resampling 24-bit and 32-bit integer to 32-bit float for high
1521        resolution output in `DefaultAudioSink`
1522        ([#3635](https://github.com/google/ExoPlayer/pull/3635)).
1523*   Captions:
1524    *   Basic support for PGS subtitles
1525        ([#3008](https://github.com/google/ExoPlayer/issues/3008)).
1526    *   Fix handling of CEA-608 captions where multiple buffers have the same
1527        presentation timestamp
1528        ([#3782](https://github.com/google/ExoPlayer/issues/3782)).
1529*   Caching:
1530    *   Fix cache corruption issue
1531        ([#3762](https://github.com/google/ExoPlayer/issues/3762)).
1532    *   Implement periodic check in `CacheDataSource` to see whether it's
1533        possible to switch to reading/writing the cache having initially
1534        bypassed it.
1535*   IMA extension:
1536    *   Fix the player getting stuck when an ad group fails to load
1537        ([#3584](https://github.com/google/ExoPlayer/issues/3584)).
1538    *   Work around loadAd not being called beore the LOADED AdEvent arrives
1539        ([#3552](https://github.com/google/ExoPlayer/issues/3552)).
1540    *   Handle asset mismatch errors
1541        ([#3801](https://github.com/google/ExoPlayer/issues/3801)).
1542    *   Add support for playing non-Extractor content MediaSources in the IMA
1543        demo app ([#3676](https://github.com/google/ExoPlayer/issues/3676)).
1544    *   Fix handling of ad tags where ad groups are out of order
1545        ([#3716](https://github.com/google/ExoPlayer/issues/3716)).
1546    *   Fix handling of ad tags with only preroll/postroll ad groups
1547        ([#3715](https://github.com/google/ExoPlayer/issues/3715)).
1548    *   Propagate ad media preparation errors to IMA so that the ads can be
1549        skipped.
1550    *   Handle exceptions in IMA callbacks so that can be logged less verbosely.
1551*   New Cast extension. Simplifies toggling between local and Cast playbacks.
1552*   `EventLogger` moved from the demo app into the core library.
1553*   Fix ANR issue on the Huawei P8 Lite, Huawei Y6II, Moto C+, Meizu M5C, Lenovo
1554    K4 Note and Sony Xperia E5.
1555    ([#3724](https://github.com/google/ExoPlayer/issues/3724),
1556    [#3835](https://github.com/google/ExoPlayer/issues/3835)).
1557*   Fix potential NPE when removing media sources from a
1558    DynamicConcatenatingMediaSource
1559    ([#3796](https://github.com/google/ExoPlayer/issues/3796)).
1560*   Check `sys.display-size` on Philips ATVs
1561    ([#3807](https://github.com/google/ExoPlayer/issues/3807)).
1562*   Release `Extractor`s on the loading thread to avoid potentially leaking
1563    resources when the playback thread has quit by the time the loading task has
1564    completed.
1565*   ID3: Better handle malformed ID3 data
1566    ([#3792](https://github.com/google/ExoPlayer/issues/3792).
1567*   Support 14-bit mode and little endianness in DTS PES packets
1568    ([#3340](https://github.com/google/ExoPlayer/issues/3340)).
1569*   Demo app: Add ability to download not DRM protected content.
1570
1571### 2.6.1 (2017-12-15)
1572
1573*   Add factories to `ExtractorMediaSource`, `HlsMediaSource`, `SsMediaSource`,
1574    `DashMediaSource` and `SingleSampleMediaSource`.
1575*   Use the same listener `MediaSourceEventListener` for all MediaSource
1576    implementations.
1577*   IMA extension:
1578    *   Support non-ExtractorMediaSource ads
1579        ([#3302](https://github.com/google/ExoPlayer/issues/3302)).
1580    *   Skip ads before the ad preceding the player's initial seek position
1581        ([#3527](https://github.com/google/ExoPlayer/issues/3527)).
1582    *   Fix ad loading when there is no preroll.
1583    *   Add an option to turn off hiding controls during ad playback
1584        ([#3532](https://github.com/google/ExoPlayer/issues/3532)).
1585    *   Support specifying an ads response instead of an ad tag
1586        ([#3548](https://github.com/google/ExoPlayer/issues/3548)).
1587    *   Support overriding the ad load timeout
1588        ([#3556](https://github.com/google/ExoPlayer/issues/3556)).
1589*   DASH: Support time zone designators in ISO8601 UTCTiming elements
1590    ([#3524](https://github.com/google/ExoPlayer/issues/3524)).
1591*   Audio:
1592    *   Support 32-bit PCM float output from `DefaultAudioSink`, and add an
1593        option to use this with `FfmpegAudioRenderer`.
1594    *   Add support for extracting 32-bit WAVE files
1595        ([#3379](https://github.com/google/ExoPlayer/issues/3379)).
1596    *   Support extraction and decoding of Dolby Atmos
1597        ([#2465](https://github.com/google/ExoPlayer/issues/2465)).
1598    *   Fix handling of playback parameter changes while paused when followed by
1599        a seek.
1600*   SimpleExoPlayer: Allow multiple audio and video debug listeners.
1601*   DefaultTrackSelector: Support undefined language text track selection when
1602    the preferred language is not available
1603    ([#2980](https://github.com/google/ExoPlayer/issues/2980)).
1604*   Add options to `DefaultLoadControl` to set maximum buffer size in bytes and
1605    to choose whether size or time constraints are prioritized.
1606*   Use surfaceless context for secure `DummySurface`, if available
1607    ([#3558](https://github.com/google/ExoPlayer/issues/3558)).
1608*   FLV: Fix playback of live streams that do not contain an audio track
1609    ([#3188](https://github.com/google/ExoPlayer/issues/3188)).
1610*   CEA-608: Fix handling of row count changes in roll-up mode
1611    ([#3513](https://github.com/google/ExoPlayer/issues/3513)).
1612*   Prevent period transitions when seeking to the end of a period when paused
1613    ([#2439](https://github.com/google/ExoPlayer/issues/2439)).
1614
1615### 2.6.0 (2017-11-03)
1616
1617*   Removed "r" prefix from versions. This release is "2.6.0", not "r2.6.0".
1618*   New `Player.DefaultEventListener` abstract class can be extended to avoid
1619    having to implement all methods defined by `Player.EventListener`.
1620*   Added a reason to `EventListener.onPositionDiscontinuity`
1621    ([#3252](https://github.com/google/ExoPlayer/issues/3252)).
1622*   New `setShuffleModeEnabled` method for enabling shuffled playback.
1623*   SimpleExoPlayer: Support for multiple video, text and metadata outputs.
1624*   Support for `Renderer`s that don't consume any media
1625    ([#3212](https://github.com/google/ExoPlayer/issues/3212)).
1626*   Fix reporting of internal position discontinuities via
1627    `Player.onPositionDiscontinuity`. `DISCONTINUITY_REASON_SEEK_ADJUSTMENT` is
1628    added to disambiguate position adjustments during seeks from other types of
1629    internal position discontinuity.
1630*   Fix potential `IndexOutOfBoundsException` when calling
1631    `ExoPlayer.getDuration`
1632    ([#3362](https://github.com/google/ExoPlayer/issues/3362)).
1633*   Fix playbacks involving looping, concatenation and ads getting stuck when
1634    media contains tracks with uneven durations
1635    ([#1874](https://github.com/google/ExoPlayer/issues/1874)).
1636*   Fix issue with `ContentDataSource` when reading from certain
1637    `ContentProvider` implementations
1638    ([#3426](https://github.com/google/ExoPlayer/issues/3426)).
1639*   Better playback experience when the video decoder cannot keep up, by
1640    skipping to key-frames. This is particularly relevant for variable speed
1641    playbacks.
1642*   Allow `SingleSampleMediaSource` to suppress load errors
1643    ([#3140](https://github.com/google/ExoPlayer/issues/3140)).
1644*   `DynamicConcatenatingMediaSource`: Allow specifying a callback to be invoked
1645    after a dynamic playlist modification has been applied
1646    ([#3407](https://github.com/google/ExoPlayer/issues/3407)).
1647*   Audio: New `AudioSink` interface allows customization of audio output path.
1648*   Offline: Added `Downloader` implementations for DASH, HLS, SmoothStreaming
1649    and progressive streams.
1650*   Track selection:
1651    *   Fixed adaptive track selection logic for live playbacks
1652        ([#3017](https://github.com/google/ExoPlayer/issues/3017)).
1653    *   Added ability to select the lowest bitrate tracks.
1654*   DASH:
1655    *   Don't crash when a malformed or unexpected manifest update occurs
1656        ([#2795](https://github.com/google/ExoPlayer/issues/2795)).
1657*   HLS:
1658    *   Support for Widevine protected FMP4 variants.
1659    *   Support CEA-608 in FMP4 variants.
1660    *   Support extractor injection
1661        ([#2748](https://github.com/google/ExoPlayer/issues/2748)).
1662*   DRM:
1663    *   Improved compatibility with ClearKey content
1664        ([#3138](https://github.com/google/ExoPlayer/issues/3138)).
1665    *   Support multiple PSSH boxes of the same type.
1666    *   Retry initial provisioning and key requests if they fail
1667    *   Fix incorrect parsing of non-CENC sinf boxes.
1668*   IMA extension:
1669    *   Expose `AdsLoader` via getter
1670        ([#3322](https://github.com/google/ExoPlayer/issues/3322)).
1671    *   Handle `setPlayWhenReady` calls during ad playbacks
1672        ([#3303](https://github.com/google/ExoPlayer/issues/3303)).
1673    *   Ignore seeks if an ad is playing
1674        ([#3309](https://github.com/google/ExoPlayer/issues/3309)).
1675    *   Improve robustness of `ImaAdsLoader` in case content is not paused
1676        between content to ad transitions
1677        ([#3430](https://github.com/google/ExoPlayer/issues/3430)).
1678*   UI:
1679    *   Allow specifying a `Drawable` for the `TimeBar` scrubber
1680        ([#3337](https://github.com/google/ExoPlayer/issues/3337)).
1681    *   Allow multiple listeners on `TimeBar`
1682        ([#3406](https://github.com/google/ExoPlayer/issues/3406)).
1683*   New Leanback extension: Simplifies binding Exoplayer to Leanback UI
1684    components.
1685*   Unit tests moved to Robolectric.
1686*   Misc bugfixes.
1687
1688### r2.5.4 (2017-10-19)
1689
1690*   Remove unnecessary media playlist fetches during playback of live HLS
1691    streams.
1692*   Add the ability to inject a HLS playlist parser through `HlsMediaSource`.
1693*   Fix potential `IndexOutOfBoundsException` when using `ImaMediaSource`
1694    ([#3334](https://github.com/google/ExoPlayer/issues/3334)).
1695*   Fix an issue parsing MP4 content containing non-CENC sinf boxes.
1696*   Fix memory leak when seeking with repeated periods.
1697*   Fix playback position when `ExoPlayer.prepare` is called with
1698    `resetPosition` set to false.
1699*   Ignore MP4 edit lists that seem invalid
1700    ([#3351](https://github.com/google/ExoPlayer/issues/3351)).
1701*   Add extractor flag for ignoring all MP4 edit lists
1702    ([#3358](https://github.com/google/ExoPlayer/issues/3358)).
1703*   Improve extensibility by exposing public constructors for
1704    `FrameworkMediaCrypto` and by making `DefaultDashChunkSource.getNextChunk`
1705    non-final.
1706
1707### r2.5.3 (2017-09-20)
1708
1709*   IMA extension: Support skipping of skippable ads on AndroidTV and other
1710    non-touch devices
1711    ([#3258](https://github.com/google/ExoPlayer/issues/3258)).
1712*   HLS: Fix broken WebVTT captions when PTS wraps around
1713    ([#2928](https://github.com/google/ExoPlayer/issues/2928)).
1714*   Captions: Fix issues rendering CEA-608 captions
1715    ([#3250](https://github.com/google/ExoPlayer/issues/3250)).
1716*   Workaround broken AAC decoders on Galaxy S6
1717    ([#3249](https://github.com/google/ExoPlayer/issues/3249)).
1718*   Caching: Fix infinite loop when cache eviction fails
1719    ([#3260](https://github.com/google/ExoPlayer/issues/3260)).
1720*   Caching: Force use of BouncyCastle on JellyBean to fix decryption issue
1721    ([#2755](https://github.com/google/ExoPlayer/issues/2755)).
1722
1723### r2.5.2 (2017-09-11)
1724
1725*   IMA extension: Fix issue where ad playback could end prematurely for some
1726    content types ([#3180](https://github.com/google/ExoPlayer/issues/3180)).
1727*   RTMP extension: Fix SIGABRT on fast RTMP stream restart
1728    ([#3156](https://github.com/google/ExoPlayer/issues/3156)).
1729*   UI: Allow app to manually specify ad markers
1730    ([#3184](https://github.com/google/ExoPlayer/issues/3184)).
1731*   DASH: Expose segment indices to subclasses of DefaultDashChunkSource
1732    ([#3037](https://github.com/google/ExoPlayer/issues/3037)).
1733*   Captions: Added robustness against malformed WebVTT captions
1734    ([#3228](https://github.com/google/ExoPlayer/issues/3228)).
1735*   DRM: Support forcing a specific license URL.
1736*   Fix playback error when seeking in media loaded through content:// URIs
1737    ([#3216](https://github.com/google/ExoPlayer/issues/3216)).
1738*   Fix issue playing MP4s in which the last atom specifies a size of zero
1739    ([#3191](https://github.com/google/ExoPlayer/issues/3191)).
1740*   Workaround playback failures on some Xiaomi devices
1741    ([#3171](https://github.com/google/ExoPlayer/issues/3171)).
1742*   Workaround SIGSEGV issue on some devices when setting and swapping surface
1743    for secure playbacks
1744    ([#3215](https://github.com/google/ExoPlayer/issues/3215)).
1745*   Workaround for Nexus 7 issue when swapping output surface
1746    ([#3236](https://github.com/google/ExoPlayer/issues/3236)).
1747*   Workaround for SimpleExoPlayerView's surface not being hidden properly
1748    ([#3160](https://github.com/google/ExoPlayer/issues/3160)).
1749
1750### r2.5.1 (2017-08-08)
1751
1752*   Fix an issue that could cause the reported playback position to stop
1753    advancing in some cases.
1754*   Fix an issue where a Surface could be released whilst still in use by the
1755    player.
1756
1757### r2.5.0 (2017-08-07)
1758
1759*   IMA extension: Wraps the Google Interactive Media Ads (IMA) SDK to provide
1760    an easy and seamless way of incorporating display ads into ExoPlayer
1761    playbacks. You can read more about the IMA extension
1762    [here](https://medium.com/google-exoplayer/playing-ads-with-exoplayer-and-ima-868dfd767ea).
1763*   MediaSession extension: Provides an easy way to connect ExoPlayer with
1764    MediaSessionCompat in the Android Support Library.
1765*   RTMP extension: An extension for playing streams over RTMP.
1766*   Build: Made it easier for application developers to depend on a local
1767    checkout of ExoPlayer. You can learn how to do this
1768    [here](https://medium.com/google-exoplayer/howto-2-depend-on-a-local-checkout-of-exoplayer-bcd7f8531720).
1769*   Core playback improvements:
1770    *   Eliminated re-buffering when changing audio and text track selections
1771        during playback of progressive streams
1772        ([#2926](https://github.com/google/ExoPlayer/issues/2926)).
1773    *   New DynamicConcatenatingMediaSource class to support playback of dynamic
1774        playlists.
1775    *   New ExoPlayer.setRepeatMode method for dynamic toggling of repeat mode
1776        during playback. Use of setRepeatMode should be preferred to
1777        LoopingMediaSource for most looping use cases. You can read more about
1778        setRepeatMode
1779        [here](https://medium.com/google-exoplayer/repeat-modes-in-exoplayer-19dd85f036d3).
1780    *   Eliminated jank when switching video playback from one Surface to
1781        another on API level 23+ for unencrypted content, and on devices that
1782        support the EGL_EXT_protected_content OpenGL extension for protected
1783        content ([#677](https://github.com/google/ExoPlayer/issues/677)).
1784    *   Enabled ExoPlayer instantiation on background threads without Loopers.
1785        Events from such players are delivered on the application's main thread.
1786*   HLS improvements:
1787    *   Optimized adaptive switches for playlists that specify the
1788        EXT-X-INDEPENDENT-SEGMENTS tag.
1789    *   Optimized in-buffer seeking
1790        ([#551](https://github.com/google/ExoPlayer/issues/551)).
1791    *   Eliminated re-buffering when changing audio and text track selections
1792        during playback, provided the new selection does not require switching
1793        to different renditions
1794        ([#2718](https://github.com/google/ExoPlayer/issues/2718)).
1795    *   Exposed all media playlist tags in ExoPlayer's MediaPlaylist object.
1796*   DASH: Support for seamless switching across streams in different
1797    AdaptationSet elements
1798    ([#2431](https://github.com/google/ExoPlayer/issues/2431)).
1799*   DRM: Support for additional crypto schemes (cbc1, cbcs and cens) on API
1800    level 24+ ([#1989](https://github.com/google/ExoPlayer/issues/1989)).
1801*   Captions: Initial support for SSA/ASS subtitles
1802    ([#889](https://github.com/google/ExoPlayer/issues/889)).
1803*   AndroidTV: Fixed issue where tunneled video playback would not start on some
1804    devices ([#2985](https://github.com/google/ExoPlayer/issues/2985)).
1805*   MPEG-TS: Fixed segmentation issue when parsing H262
1806    ([#2891](https://github.com/google/ExoPlayer/issues/2891)).
1807*   Cronet extension: Support for a user-defined fallback if Cronet library is
1808    not present.
1809*   Fix buffer too small IllegalStateException issue affecting some composite
1810    media playbacks ([#2900](https://github.com/google/ExoPlayer/issues/2900)).
1811*   Misc bugfixes.
1812
1813### r2.4.4 (2017-07-19)
1814
1815*   HLS/MPEG-TS: Some initial optimizations of MPEG-TS extractor performance
1816    ([#3040](https://github.com/google/ExoPlayer/issues/3040)).
1817*   HLS: Fix propagation of format identifier for CEA-608
1818    ([#3033](https://github.com/google/ExoPlayer/issues/3033)).
1819*   HLS: Detect playlist stuck and reset conditions
1820    ([#2872](https://github.com/google/ExoPlayer/issues/2872)).
1821*   Video: Fix video dimension reporting on some devices
1822    ([#3007](https://github.com/google/ExoPlayer/issues/3007)).
1823
1824### r2.4.3 (2017-06-30)
1825
1826*   Audio: Workaround custom audio decoders misreporting their maximum supported
1827    channel counts ([#2940](https://github.com/google/ExoPlayer/issues/2940)).
1828*   Audio: Workaround for broken MediaTek raw decoder on some devices
1829    ([#2873](https://github.com/google/ExoPlayer/issues/2873)).
1830*   Captions: Fix TTML captions appearing at the top of the screen
1831    ([#2953](https://github.com/google/ExoPlayer/issues/2953)).
1832*   Captions: Fix handling of some DVB subtitles
1833    ([#2957](https://github.com/google/ExoPlayer/issues/2957)).
1834*   Track selection: Fix setSelectionOverride(index, tracks, null)
1835    ([#2988](https://github.com/google/ExoPlayer/issues/2988)).
1836*   GVR extension: Add support for mono input
1837    ([#2710](https://github.com/google/ExoPlayer/issues/2710)).
1838*   FLAC extension: Fix failing build
1839    ([#2977](https://github.com/google/ExoPlayer/pull/2977)).
1840*   Misc bugfixes.
1841
1842### r2.4.2 (2017-06-06)
1843
1844*   Stability: Work around Nexus 10 reboot when playing certain content
1845    ([#2806](https://github.com/google/ExoPlayer/issues/2806)).
1846*   MP3: Correctly treat MP3s with INFO headers as constant bitrate
1847    ([#2895](https://github.com/google/ExoPlayer/issues/2895)).
1848*   HLS: Use average rather than peak bandwidth when available
1849    ([#2863](https://github.com/google/ExoPlayer/issues/2863)).
1850*   SmoothStreaming: Fix timeline for live streams
1851    ([#2760](https://github.com/google/ExoPlayer/issues/2760)).
1852*   UI: Fix DefaultTimeBar invalidation
1853    ([#2871](https://github.com/google/ExoPlayer/issues/2871)).
1854*   Misc bugfixes.
1855
1856### r2.4.1 (2017-05-23)
1857
1858*   Stability: Avoid OutOfMemoryError in extractors when parsing malformed media
1859    ([#2780](https://github.com/google/ExoPlayer/issues/2780)).
1860*   Stability: Avoid native crash on Galaxy Nexus. Avoid unnecessarily large
1861    codec input buffer allocations on all devices
1862    ([#2607](https://github.com/google/ExoPlayer/issues/2607)).
1863*   Variable speed playback: Fix interpolation for rate/pitch adjustment
1864    ([#2774](https://github.com/google/ExoPlayer/issues/2774)).
1865*   HLS: Include EXT-X-DATERANGE tags in HlsMediaPlaylist.
1866*   HLS: Don't expose CEA-608 track if CLOSED-CAPTIONS=NONE
1867    ([#2743](https://github.com/google/ExoPlayer/issues/2743)).
1868*   HLS: Correctly propagate errors loading the media playlist
1869    ([#2623](https://github.com/google/ExoPlayer/issues/2623)).
1870*   UI: DefaultTimeBar enhancements and bug fixes
1871    ([#2740](https://github.com/google/ExoPlayer/issues/2740)).
1872*   Ogg: Fix failure to play some Ogg files
1873    ([#2782](https://github.com/google/ExoPlayer/issues/2782)).
1874*   Captions: Don't select text tack with no language by default.
1875*   Captions: TTML positioning fixes
1876    ([#2824](https://github.com/google/ExoPlayer/issues/2824)).
1877*   Misc bugfixes.
1878
1879### r2.4.0 (2017-04-25)
1880
1881*   New modular library structure. You can read more about depending on
1882    individual library modules
1883    [here](https://medium.com/google-exoplayer/exoplayers-new-modular-structure-a916c0874907).
1884*   Variable speed playback support on API level 16+. You can read more about
1885    changing the playback speed
1886    [here](https://medium.com/google-exoplayer/variable-speed-playback-with-exoplayer-e6e6a71e0343)
1887    ([#26](https://github.com/google/ExoPlayer/issues/26)).
1888*   New time bar view, including support for displaying ad break markers.
1889*   Support DVB subtitles in MPEG-TS and MKV.
1890*   Support adaptive playback for audio only DASH, HLS and SmoothStreaming
1891    ([#1975](https://github.com/google/ExoPlayer/issues/1975)).
1892*   Support for setting extractor flags on DefaultExtractorsFactory
1893    ([#2657](https://github.com/google/ExoPlayer/issues/2657)).
1894*   Support injecting custom renderers into SimpleExoPlayer using a new
1895    RenderersFactory interface.
1896*   Correctly set ExoPlayer's internal thread priority to
1897    `THREAD_PRIORITY_AUDIO`.
1898*   TX3G: Support styling and positioning.
1899*   FLV:
1900    *   Support MP3 in FLV.
1901    *   Skip unhandled metadata rather than failing
1902        ([#2634](https://github.com/google/ExoPlayer/issues/2634)).
1903    *   Fix potential OutOfMemory errors.
1904*   ID3: Better handle malformed ID3 data
1905    ([#2604](https://github.com/google/ExoPlayer/issues/2604),
1906    [#2663](https://github.com/google/ExoPlayer/issues/2663)).
1907*   FFmpeg extension: Fixed build instructions
1908    ([#2561](https://github.com/google/ExoPlayer/issues/2561)).
1909*   VP9 extension: Reduced binary size.
1910*   FLAC extension: Enabled 64 bit targets.
1911*   Misc bugfixes.
1912
1913### r2.3.1 (2017-03-23)
1914
1915*   Fix NPE enabling WebVTT subtitles in DASH streams
1916    ([#2596](https://github.com/google/ExoPlayer/issues/2596)).
1917*   Fix skipping to keyframes when MediaCodecVideoRenderer is enabled but
1918    without a Surface
1919    ([#2575](https://github.com/google/ExoPlayer/issues/2575)).
1920*   Minor fix for CEA-708 decoder
1921    ([#2595](https://github.com/google/ExoPlayer/issues/2595)).
1922
1923### r2.3.0 (2017-03-16)
1924
1925*   GVR extension: Wraps the Google VR Audio SDK to provide spatial audio
1926    rendering. You can read more about the GVR extension
1927    [here](https://medium.com/google-exoplayer/spatial-audio-with-exoplayer-and-gvr-cecb00e9da5f#.xdjebjd7g).
1928*   DASH improvements:
1929    *   Support embedded CEA-608 closed captions
1930        ([#2362](https://github.com/google/ExoPlayer/issues/2362)).
1931    *   Support embedded EMSG events
1932        ([#2176](https://github.com/google/ExoPlayer/issues/2176)).
1933    *   Support mspr:pro manifest element
1934        ([#2386](https://github.com/google/ExoPlayer/issues/2386)).
1935    *   Correct handling of empty segment indices at the start of live events
1936        ([#1865](https://github.com/google/ExoPlayer/issues/1865)).
1937*   HLS improvements:
1938    *   Respect initial track selection
1939        ([#2353](https://github.com/google/ExoPlayer/issues/2353)).
1940    *   Reduced frequency of media playlist requests when playback position is
1941        close to the live edge
1942        ([#2548](https://github.com/google/ExoPlayer/issues/2548)).
1943    *   Exposed the master playlist through ExoPlayer.getCurrentManifest()
1944        ([#2537](https://github.com/google/ExoPlayer/issues/2537)).
1945    *   Support CLOSED-CAPTIONS #EXT-X-MEDIA type
1946        ([#341](https://github.com/google/ExoPlayer/issues/341)).
1947    *   Fixed handling of negative values in #EXT-X-SUPPORT
1948        ([#2495](https://github.com/google/ExoPlayer/issues/2495)).
1949    *   Fixed potential endless buffering state for streams with WebVTT
1950        subtitles ([#2424](https://github.com/google/ExoPlayer/issues/2424)).
1951*   MPEG-TS improvements:
1952    *   Support for multiple programs.
1953    *   Support for multiple closed captions and caption service descriptors
1954        ([#2161](https://github.com/google/ExoPlayer/issues/2161)).
1955*   MP3: Add `FLAG_ENABLE_CONSTANT_BITRATE_SEEKING` extractor option to enable
1956    constant bitrate seeking in MP3 files that would otherwise be unseekable
1957    ([#2445](https://github.com/google/ExoPlayer/issues/2445)).
1958*   ID3: Better handle malformed ID3 data
1959    ([#2486](https://github.com/google/ExoPlayer/issues/2486)).
1960*   Track selection: Added maxVideoBitrate parameter to DefaultTrackSelector.
1961*   DRM: Add support for CENC ClearKey on API level 21+
1962    ([#2361](https://github.com/google/ExoPlayer/issues/2361)).
1963*   DRM: Support dynamic setting of key request headers
1964    ([#1924](https://github.com/google/ExoPlayer/issues/1924)).
1965*   SmoothStreaming: Fixed handling of start_time placeholder
1966    ([#2447](https://github.com/google/ExoPlayer/issues/2447)).
1967*   FLAC extension: Fix proguard configuration
1968    ([#2427](https://github.com/google/ExoPlayer/issues/2427)).
1969*   Misc bugfixes.
1970
1971### r2.2.0 (2017-01-30)
1972
1973*   Demo app: Automatic recovery from BehindLiveWindowException, plus improved
1974    handling of pausing and resuming live streams
1975    ([#2344](https://github.com/google/ExoPlayer/issues/2344)).
1976*   AndroidTV: Added Support for tunneled video playback
1977    ([#1688](https://github.com/google/ExoPlayer/issues/1688)).
1978*   DRM: Renamed StreamingDrmSessionManager to DefaultDrmSessionManager and
1979    added support for using offline licenses
1980    ([#876](https://github.com/google/ExoPlayer/issues/876)).
1981*   DRM: Introduce OfflineLicenseHelper to help with offline license
1982    acquisition, renewal and release.
1983*   UI: Updated player control assets. Added vector drawables for use on API
1984    level 21 and above.
1985*   UI: Made player control seek bar work correctly with key events if focusable
1986    ([#2278](https://github.com/google/ExoPlayer/issues/2278)).
1987*   HLS: Improved support for streams that use EXT-X-DISCONTINUITY without
1988    EXT-X-DISCONTINUITY-SEQUENCE
1989    ([#1789](https://github.com/google/ExoPlayer/issues/1789)).
1990*   HLS: Support for EXT-X-START tag
1991    ([#1544](https://github.com/google/ExoPlayer/issues/1544)).
1992*   HLS: Check #EXTM3U header is present when parsing the playlist. Fail
1993    gracefully if not
1994    ([#2301](https://github.com/google/ExoPlayer/issues/2301)).
1995*   HLS: Fix memory leak
1996    ([#2319](https://github.com/google/ExoPlayer/issues/2319)).
1997*   HLS: Fix non-seamless first adaptation where master playlist omits
1998    resolution tags ([#2096](https://github.com/google/ExoPlayer/issues/2096)).
1999*   HLS: Fix handling of WebVTT subtitle renditions with non-standard segment
2000    file extensions ([#2025](https://github.com/google/ExoPlayer/issues/2025)
2001    and [#2355](https://github.com/google/ExoPlayer/issues/2355)).
2002*   HLS: Better handle inconsistent HLS playlist update
2003    ([#2249](https://github.com/google/ExoPlayer/issues/2249)).
2004*   DASH: Don't overflow when dealing with large segment numbers
2005    ([#2311](https://github.com/google/ExoPlayer/issues/2311)).
2006*   DASH: Fix propagation of language from the manifest
2007    ([#2335](https://github.com/google/ExoPlayer/issues/2335)).
2008*   SmoothStreaming: Work around "Offset to sample data was negative" failures
2009    ([#2292](https://github.com/google/ExoPlayer/issues/2292),
2010    [#2101](https://github.com/google/ExoPlayer/issues/2101) and
2011    [#1152](https://github.com/google/ExoPlayer/issues/1152)).
2012*   MP3/ID3: Added support for parsing Chapter and URL link frames
2013    ([#2316](https://github.com/google/ExoPlayer/issues/2316)).
2014*   MP3/ID3: Handle ID3 frames that end with empty text field
2015    ([#2309](https://github.com/google/ExoPlayer/issues/2309)).
2016*   Added ClippingMediaSource for playing clipped portions of media
2017    ([#1988](https://github.com/google/ExoPlayer/issues/1988)).
2018*   Added convenience methods to query whether the current window is dynamic and
2019    seekable ([#2320](https://github.com/google/ExoPlayer/issues/2320)).
2020*   Support setting of default headers on HttpDataSource.Factory implementations
2021    ([#2166](https://github.com/google/ExoPlayer/issues/2166)).
2022*   Fixed cache failures when using an encrypted cache content index.
2023*   Fix visual artifacts when switching output surface
2024    ([#2093](https://github.com/google/ExoPlayer/issues/2093)).
2025*   Fix gradle + proguard configurations.
2026*   Fix player position when replacing the MediaSource
2027    ([#2369](https://github.com/google/ExoPlayer/issues/2369)).
2028*   Misc bug fixes, including
2029    [#2330](https://github.com/google/ExoPlayer/issues/2330),
2030    [#2269](https://github.com/google/ExoPlayer/issues/2269),
2031    [#2252](https://github.com/google/ExoPlayer/issues/2252),
2032    [#2264](https://github.com/google/ExoPlayer/issues/2264) and
2033    [#2290](https://github.com/google/ExoPlayer/issues/2290).
2034
2035### r2.1.1 (2016-12-20)
2036
2037*   Fix some subtitle types (e.g. WebVTT) being displayed out of sync
2038    ([#2208](https://github.com/google/ExoPlayer/issues/2208)).
2039*   Fix incorrect position reporting for on-demand HLS media that includes
2040    EXT-X-PROGRAM-DATE-TIME tags
2041    ([#2224](https://github.com/google/ExoPlayer/issues/2224)).
2042*   Fix issue where playbacks could get stuck in the initial buffering state if
2043    over 1MB of data needs to be read to initialize the playback.
2044
2045### r2.1.0 (2016-12-14)
2046
2047*   HLS: Support for seeking in live streams
2048    ([#87](https://github.com/google/ExoPlayer/issues/87)).
2049*   HLS: Improved support:
2050    *   Support for EXT-X-PROGRAM-DATE-TIME
2051        ([#747](https://github.com/google/ExoPlayer/issues/747)).
2052    *   Improved handling of sample timestamps and their alignment across
2053        variants and renditions.
2054    *   Fix issue that could cause playbacks to get stuck in an endless initial
2055        buffering state.
2056    *   Correctly propagate BehindLiveWindowException instead of
2057        IndexOutOfBoundsException exception
2058        ([#1695](https://github.com/google/ExoPlayer/issues/1695)).
2059*   MP3/MP4: Support for ID3 metadata, including embedded album art
2060    ([#979](https://github.com/google/ExoPlayer/issues/979)).
2061*   Improved customization of UI components. You can read about customization of
2062    ExoPlayer's UI components
2063    [here](https://medium.com/google-exoplayer/customizing-exoplayers-ui-components-728cf55ee07a#.9ewjg7avi).
2064*   Robustness improvements when handling MediaSource timeline changes and
2065    MediaPeriod transitions.
2066*   CEA-608: Support for caption styling and positioning.
2067*   MPEG-TS: Improved support:
2068    *   Support injection of custom TS payload readers.
2069    *   Support injection of custom section payload readers.
2070    *   Support SCTE-35 splice information messages.
2071    *   Support multiple table sections in a single PSI section.
2072    *   Fix NullPointerException when an unsupported stream type is encountered
2073        ([#2149](https://github.com/google/ExoPlayer/issues/2149)).
2074    *   Avoid failure when expected ID3 header not found
2075        ([#1966](https://github.com/google/ExoPlayer/issues/1966)).
2076*   Improvements to the upstream cache package.
2077    *   Support caching of media segments for DASH, HLS and SmoothStreaming.
2078        Note that caching of manifest and playlist files is still not supported
2079        in the (normal) case where the corresponding responses are compressed.
2080    *   Support caching for ExtractorMediaSource based playbacks.
2081*   Improved flexibility of SimpleExoPlayer
2082    ([#2102](https://github.com/google/ExoPlayer/issues/2102)).
2083*   Fix issue where only the audio of a video would play due to capability
2084    detection issues ([#2007](https://github.com/google/ExoPlayer/issues/2007),
2085    [#2034](https://github.com/google/ExoPlayer/issues/2034) and
2086    [#2157](https://github.com/google/ExoPlayer/issues/2157)).
2087*   Fix issues that could cause ExtractorMediaSource based playbacks to get
2088    stuck buffering ([#1962](https://github.com/google/ExoPlayer/issues/1962)).
2089*   Correctly set SimpleExoPlayerView surface aspect ratio when an active player
2090    is attached ([#2077](https://github.com/google/ExoPlayer/issues/2077)).
2091*   OGG: Fix playback of short OGG files
2092    ([#1976](https://github.com/google/ExoPlayer/issues/1976)).
2093*   MP4: Support `.mp3` tracks
2094    ([#2066](https://github.com/google/ExoPlayer/issues/2066)).
2095*   SubRip: Don't fail playbacks if SubRip file contains negative timestamps
2096    ([#2145](https://github.com/google/ExoPlayer/issues/2145)).
2097*   Misc bugfixes.
2098
2099### r2.0.4 (2016-10-20)
2100
2101*   Fix crash on Jellybean devices when using playback controls
2102    ([#1965](https://github.com/google/ExoPlayer/issues/1965)).
2103
2104### r2.0.3 (2016-10-17)
2105
2106*   Fixed NullPointerException in ExtractorMediaSource
2107    ([#1914](https://github.com/google/ExoPlayer/issues/1914)).
2108*   Fixed NullPointerException in HlsMediaPeriod
2109    ([#1907](https://github.com/google/ExoPlayer/issues/1907)).
2110*   Fixed memory leak in PlaybackControlView
2111    ([#1908](https://github.com/google/ExoPlayer/issues/1908)).
2112*   Fixed strict mode violation when using
2113    SimpleExoPlayer.setVideoPlayerTextureView().
2114*   Fixed L3 Widevine provisioning
2115    ([#1925](https://github.com/google/ExoPlayer/issues/1925)).
2116*   Fixed hiding of controls with use_controller="false"
2117    ([#1919](https://github.com/google/ExoPlayer/issues/1919)).
2118*   Improvements to Cronet network stack extension.
2119*   Misc bug fixes.
2120
2121### r2.0.2 (2016-10-06)
2122
2123*   Fixes for MergingMediaSource and sideloaded subtitles.
2124    ([#1882](https://github.com/google/ExoPlayer/issues/1882),
2125    [#1854](https://github.com/google/ExoPlayer/issues/1854),
2126    [#1900](https://github.com/google/ExoPlayer/issues/1900)).
2127*   Reduced effect of application code leaking player references
2128    ([#1855](https://github.com/google/ExoPlayer/issues/1855)).
2129*   Initial support for fragmented MP4 in HLS.
2130*   Misc bug fixes and minor features.
2131
2132### r2.0.1 (2016-09-30)
2133
2134*   Fix playback of short duration content
2135    ([#1837](https://github.com/google/ExoPlayer/issues/1837)).
2136*   Fix MergingMediaSource preparation issue
2137    ([#1853](https://github.com/google/ExoPlayer/issues/1853)).
2138*   Fix live stream buffering (out of memory) issue
2139    ([#1825](https://github.com/google/ExoPlayer/issues/1825)).
2140
2141### r2.0.0 (2016-09-14)
2142
2143ExoPlayer 2.x is a major iteration of the library. It includes significant API
2144and architectural changes, new features and many bug fixes. You can read about
2145some of the motivations behind ExoPlayer 2.x
2146[here](https://medium.com/google-exoplayer/exoplayer-2-x-why-what-and-when-74fd9cb139#.am7h8nytm).
2147
2148*   Root package name changed to `com.google.android.exoplayer2`. The library
2149    structure and class names have also been sanitized. Read more
2150    [here](https://medium.com/google-exoplayer/exoplayer-2-x-new-package-and-class-names-ef8e1d9ba96f#.lv8sd4nez).
2151*   Key architectural changes:
2152    *   Late binding between rendering and media source components. Allows the
2153        same rendering components to be re-used from one playback to another.
2154        Enables features such as gapless playback through playlists and DASH
2155        multi-period support.
2156    *   Improved track selection design. More details can be found
2157        [here](https://medium.com/google-exoplayer/exoplayer-2-x-track-selection-2b62ff712cc9#.n00zo76b6).
2158    *   LoadControl now used to control buffering and loading across all
2159        playback types.
2160    *   Media source components given additional structure. A new MediaSource
2161        class has been introduced. MediaSources expose Timelines that describe
2162        the media they expose, and can consist of multiple MediaPeriods. This
2163        enables features such as seeking in live playbacks and DASH multi-period
2164        support.
2165    *   Responsibility for loading the initial DASH/SmoothStreaming/HLS manifest
2166        is promoted to the corresponding MediaSource components and is no longer
2167        the application's responsibility.
2168    *   Higher level abstractions such as SimpleExoPlayer have been added to the
2169        library. These make the library easier to use for common use cases. The
2170        demo app is halved in size as a result, whilst at the same time gaining
2171        more functionality. Read more
2172        [here](https://medium.com/google-exoplayer/exoplayer-2-x-improved-demo-app-d97171aaaaa1).
2173    *   Enhanced library support for implementing audio extensions. Read more
2174        [here](https://medium.com/google-exoplayer/exoplayer-2-x-new-audio-features-cfb26c2883a#.ua75vu4s3).
2175    *   Format and MediaFormat are replaced by a single Format class.
2176*   Key new features:
2177    *   Playlist support. Includes support for gapless playback between playlist
2178        items and consistent application of LoadControl and TrackSelector
2179        policies when transitioning between items
2180        ([#1270](https://github.com/google/ExoPlayer/issues/1270)).
2181    *   Seeking in live playbacks for DASH and SmoothStreaming
2182        ([#291](https://github.com/google/ExoPlayer/issues/291)).
2183    *   DASH multi-period support
2184        ([#557](https://github.com/google/ExoPlayer/issues/557)).
2185    *   MediaSource composition allows MediaSources to be concatenated into a
2186        playlist, merged and looped. Read more
2187        [here](https://medium.com/google-exoplayer/exoplayer-2-x-mediasource-composition-6c285fcbca1f#.zfha8qupz).
2188    *   Looping support (see above)
2189        ([#490](https://github.com/google/ExoPlayer/issues/490)).
2190    *   Ability to query information about all tracks in a piece of media
2191        (including those not supported by the device)
2192        ([#1121](https://github.com/google/ExoPlayer/issues/1121)).
2193    *   Improved player controls.
2194    *   Support for PSSH in fMP4 moof atoms
2195        ([#1143](https://github.com/google/ExoPlayer/issues/1143)).
2196    *   Support for Opus in Ogg
2197        ([#1447](https://github.com/google/ExoPlayer/issues/1447)).
2198    *   CacheDataSource support for standalone media file playbacks (mp3, mp4
2199        etc).
2200    *   FFMPEG extension (for audio only).
2201*   Key bug fixes:
2202    *   Removed unnecessary secondary requests when playing standalone media
2203        files ([#1041](https://github.com/google/ExoPlayer/issues/1041)).
2204    *   Fixed playback of video only (i.e. no audio) live streams
2205        ([#758](https://github.com/google/ExoPlayer/issues/758)).
2206    *   Fixed silent failure when media buffer is too small
2207        ([#583](https://github.com/google/ExoPlayer/issues/583)).
2208    *   Suppressed "Sending message to a Handler on a dead thread" warnings
2209        ([#426](https://github.com/google/ExoPlayer/issues/426)).
2210
2211# Legacy release notes
2212
2213Note: Since ExoPlayer V1 is still being maintained alongside V2, there is some
2214overlap between these notes and the notes above. r2.0.0 followed from r1.5.11,
2215and hence it can be assumed that all changes in r1.5.11 and earlier are included
2216in all V2 releases. This cannot be assumed for changes in r1.5.12 and later,
2217however it can be assumed that all such changes are included in the most recent
2218V2 release.
2219
2220### r1.5.16
2221
2222*   VP9 extension: Reduced binary size.
2223*   FLAC extension: Enabled 64 bit targets and fixed proguard config.
2224*   Misc bugfixes.
2225
2226### r1.5.15
2227
2228*   SmoothStreaming: Fixed handling of start_time placeholder
2229    ([#2447](https://github.com/google/ExoPlayer/issues/2447)).
2230*   Misc bugfixes.
2231
2232### r1.5.14
2233
2234*   Fixed cache failures when using an encrypted cache content index.
2235*   SmoothStreaming: Work around "Offset to sample data was negative" failures
2236    ([#2292](https://github.com/google/ExoPlayer/issues/2292),
2237    [#2101](https://github.com/google/ExoPlayer/issues/2101) and
2238    [#1152](https://github.com/google/ExoPlayer/issues/1152)).
2239
2240### r1.5.13
2241
2242*   Improvements to the upstream cache package.
2243*   MP4: Support `.mp3` tracks
2244    ([#2066](https://github.com/google/ExoPlayer/issues/2066)).
2245*   SubRip: Don't fail playbacks if SubRip file contains negative timestamps
2246    ([#2145](https://github.com/google/ExoPlayer/issues/2145)).
2247*   MPEG-TS: Avoid failure when expected ID3 header not found
2248    ([#1966](https://github.com/google/ExoPlayer/issues/1966)).
2249*   Misc bugfixes.
2250
2251### r1.5.12
2252
2253*   Improvements to Cronet network stack extension.
2254*   Fix bug in demo app introduced in r1.5.11 that caused L3 Widevine
2255    provisioning requests to fail.
2256*   Misc bugfixes.
2257
2258### r1.5.11
2259
2260*   Cronet network stack extension.
2261*   HLS: Fix propagation of language for alternative audio renditions
2262    ([#1784](https://github.com/google/ExoPlayer/issues/1784)).
2263*   WebM: Support for subsample encryption.
2264*   ID3: Fix EOS detection for 2-byte encodings
2265    ([#1774](https://github.com/google/ExoPlayer/issues/1774)).
2266*   MPEG-TS: Support multiple tracks of the same type.
2267*   MPEG-TS: Work toward robust handling of stream corruption.
2268*   Fix ContentDataSource failures triggered by garbage collector
2269    ([#1759](https://github.com/google/ExoPlayer/issues/1759)).
2270
2271### r1.5.10
2272
2273*   HLS: Stability fixes.
2274*   MP4: Support for stz2 Atoms.
2275*   Enable 4K format selection on Sony AndroidTV + nVidia SHIELD.
2276*   TX3G caption fixes.
2277
2278### r1.5.9
2279
2280*   MP4: Fixed incorrect sniffing in some cases (#1523).
2281*   MP4: Improved file compatibility (#1567).
2282*   ID3: Support for TIT2 and APIC frames.
2283*   Fixed querying of platform decoders on some devices.
2284*   Misc bug fixes.
2285
2286### r1.5.8
2287
2288*   HLS: Fix handling of HTTP redirects.
2289*   Audio: Minor adjustment to improve A/V sync.
2290*   OGG: Support FLAC in OGG.
2291*   TTML: Support regions.
2292*   WAV/PCM: Support 8, 24 and 32-bit WAV and PCM audio.
2293*   Misc bug fixes and performance optimizations.
2294
2295### r1.5.7
2296
2297*   OGG: Support added for OGG.
2298*   FLAC: Support for FLAC extraction and playback (via an extension).
2299*   HLS: Multiple audio track support (via Renditions).
2300*   FMP4: Support multiple tracks in fragmented MP4 (not applicable to
2301    DASH/SmoothStreaming).
2302*   WAV: Support for 16-bit WAV files.
2303*   MKV: Support non-square pixel formats.
2304*   Misc bug fixes.
2305
2306### r1.5.6
2307
2308*   MP3: Fix mono streams playing at 2x speed on some MediaTek based devices
2309    (#801).
2310*   MP3: Fix playback of some streams when stream length is unknown.
2311*   ID3: Support multiple frames of the same type in a single tag.
2312*   CEA-608: Correctly handle repeated control characters, fixing an issue in
2313    which captions would immediately disappear.
2314*   AVC3: Fix decoder failures on some MediaTek devices in the case where the
2315    first buffer fed to the decoder does not start with SPS/PPS NAL units.
2316*   Misc bug fixes.
2317
2318### r1.5.5
2319
2320*   DASH: Enable MP4 embedded WebVTT playback (#1185)
2321*   HLS: Fix handling of extended ID3 tags in MPEG-TS (#1181)
2322*   MP3: Fix incorrect position calculation in VBRI header (#1197)
2323*   Fix issue seeking backward using SingleSampleSource (#1193)
2324
2325### r1.5.4
2326
2327*   HLS: Support for variant selection and WebVtt subtitles.
2328*   MP4: Support for embedded WebVtt.
2329*   Improved device compatibility.
2330*   Fix for resource leak (Issue #1066).
2331*   Misc bug fixes + minor features.
2332
2333### r1.5.3
2334
2335*   Support for FLV (without seeking).
2336*   MP4: Fix for playback of media containing basic edit lists.
2337*   QuickTime: Fix parsing of QuickTime style audio sample entry.
2338*   HLS: Add H262 support for devices that have an H262 decoder.
2339*   Allow AudioTrack PlaybackParams (e.g. speed/pitch) on API level 23+.
2340*   Correctly detect 4K displays on API level 23+.
2341*   Misc bug fixes.
2342
2343### r1.5.2
2344
2345*   MPEG-TS/HLS: Fix frame drops playing H265 video.
2346*   SmoothStreaming: Fix parsing of ProtectionHeader.
2347
2348### r1.5.1
2349
2350*   Enable smooth frame release by default.
2351*   Added OkHttpDataSource extension.
2352*   AndroidTV: Correctly detect 4K display size on Bravia devices.
2353*   FMP4: Handle non-sample data in mdat boxes.
2354*   TTML: Fix parsing of some colors on Jellybean.
2355*   SmoothStreaming: Ignore tfdt boxes.
2356*   Misc bug fixes.
2357
2358### r1.5.0
2359
2360*   Multi-track support.
2361*   DASH: Limited support for multi-period manifests.
2362*   HLS: Smoother format adaptation.
2363*   HLS: Support for MP3 media segments.
2364*   TTML: Support for most embedded TTML styling.
2365*   WebVTT: Enhanced positioning support.
2366*   Initial playback tests.
2367*   Misc bug fixes.
2368
2369### r1.4.2
2370
2371*   Implemented automatic format detection for regular container formats.
2372*   Added UdpDataSource for connecting to multicast streams.
2373*   Improved robustness for MP4 playbacks.
2374*   Misc bug fixes.
2375
2376### r1.4.1
2377
2378*   HLS: Fix premature playback failures that could occur in some cases.
2379
2380### r1.4.0
2381
2382*   Support for extracting Matroska streams (implemented by WebmExtractor).
2383*   Support for tx3g captions in MP4 streams.
2384*   Support for H.265 in MPEG-TS streams on supported devices.
2385*   HLS: Added support for MPEG audio (e.g. MP3) in TS media segments.
2386*   HLS: Improved robustness against missing chunks and variants.
2387*   MP4: Added support for embedded MPEG audio (e.g. MP3).
2388*   TTML: Improved handling of whitespace.
2389*   DASH: Support Mpd.Location element.
2390*   Add option to TsExtractor to allow non-IDR keyframes.
2391*   Added MulticastDataSource for connecting to multicast streams.
2392*   (WorkInProgress) - First steps to supporting seeking in DASH DVR window.
2393*   (WorkInProgress) - First steps to supporting styled + positioned subtitles.
2394*   Misc bug fixes.
2395
2396### r1.3.3
2397
2398*   HLS: Fix failure when playing HLS AAC streams.
2399*   Misc bug fixes.
2400
2401### r1.3.2
2402
2403*   DataSource improvements: `DefaultUriDataSource` now handles http://,
2404    https://, file://, asset:// and content:// URIs automatically. It also
2405    handles file:///android_asset/* URIs, and file paths like /path/to/media.mp4
2406    where the scheme is omitted.
2407*   HLS: Fix for some ID3 events being dropped.
2408*   HLS: Correctly handle 0x0 and floating point RESOLUTION tags.
2409*   Mp3Extractor: robustness improvements.
2410
2411### r1.3.1
2412
2413*   No notes provided.
2414