# CompositeMediaSource Artifact: [androidx.media3:media3-exoplayer](https://developer.android.com/jetpack/androidx/releases/media3) [View Source](https://cs.android.com/search?q=file:androidx/media3/exoplayer/source/CompositeMediaSource.java+class:androidx.media3.exoplayer.source.CompositeMediaSource) *** ** * ** *** ``` @UnstableApi abstract class CompositeMediaSource : BaseMediaSource ```
|---|---|---| | [kotlin.Any](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-any/index.html) ||| | ↳ | [androidx.media3.exoplayer.source.BaseMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource) || | | ↳ | [androidx.media3.exoplayer.source.CompositeMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource) | Known direct subclasses [AdsMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ads/AdsMediaSource), [ConcatenatingMediaSource2](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ConcatenatingMediaSource2), [ConcatenatingMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ConcatenatingMediaSource), [ImaServerSideAdInsertionMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/ima/ImaServerSideAdInsertionMediaSource), [MergingMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MergingMediaSource), [WrappingMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/WrappingMediaSource) |---|---| | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ads/AdsMediaSource` | A `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource` that inserts ads linearly into a provided content media source. | | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ConcatenatingMediaSource2` | Concatenates multiple `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource`, combining everything in one single `https://developer.android.com/reference/kotlin/androidx/media3/common/Timeline.Window`. | | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ConcatenatingMediaSource` | **This class is deprecated.** Use playlist modification methods like `https://developer.android.com/reference/kotlin/androidx/media3/common/Player#addMediaItem(androidx.media3.common.MediaItem)` instead.
| | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/ima/ImaServerSideAdInsertionMediaSource` | MediaSource for IMA server side inserted ad streams. | | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MergingMediaSource` | Merges multiple `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource`s. | | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/WrappingMediaSource` | An abstract `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource` wrapping a single child `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource`. | Known indirect subclasses [ClippingMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ClippingMediaSource), [FilteringMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/FilteringMediaSource), [LoopingMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/LoopingMediaSource), [MaskingMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MaskingMediaSource), [PreloadMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/preload/PreloadMediaSource) |---|---| | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ClippingMediaSource` | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource` that wraps a source and clips its timeline based on specified start/end positions. | | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/FilteringMediaSource` | A `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource` that filters the available `https://developer.android.com/reference/kotlin/androidx/media3/common/C.TrackType`. | | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/LoopingMediaSource` | **This class is deprecated.** To loop a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource` indefinitely, use `https://developer.android.com/reference/kotlin/androidx/media3/common/Player#setRepeatMode(int)` instead of this class.
| | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MaskingMediaSource` | A `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource` that masks the `https://developer.android.com/reference/kotlin/androidx/media3/common/Timeline` with a placeholder until the actual media structure is known. | | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/preload/PreloadMediaSource` | Preloads a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource` and provides a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod` that has data loaded before playback. | *** ** * ** *** Composite `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource` consisting of multiple child sources. | Parameters | |---|---| | `` | The type of the id used to identify prepared child sources. | ## Summary | ### Protected constructors | |---| | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#CompositeMediaSource()()` Creates composite media source without child sources. | | ### Public functions | |---|---| | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `@https://developer.android.com/reference/kotlin/androidx/annotation/CallSuper https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#maybeThrowSourceInfoRefreshError()()` Throws any pending error encountered while loading or refreshing source information. | | ### Protected functions | |---|---| | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#disableChildSource(T)(@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull id: T!)` Disables a child source. | | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `@https://developer.android.com/reference/kotlin/androidx/annotation/CallSuper https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#disableInternal()()` Disables the source, see `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#disable(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller)`. | | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#enableChildSource(T)(@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull id: T!)` Enables a child source. | | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `@https://developer.android.com/reference/kotlin/androidx/annotation/CallSuper https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#enableInternal()()` Enables the source, see `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#enable(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller)`. | | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId?` | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#getMediaPeriodIdForChildMediaPeriodId(T,androidx.media3.exoplayer.source.MediaSource.MediaPeriodId)( @https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull childSourceId: T!, mediaPeriodId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId! )` Returns the `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId` in the composite source corresponding to the specified `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId` in a child source. | | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html` | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#getMediaTimeForChildMediaTime(T,long,androidx.media3.exoplayer.source.MediaSource.MediaPeriodId)( @https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull childSourceId: T!, mediaTimeMs: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html, mediaPeriodId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId? )` Returns the media time in the `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod` of the composite source corresponding to the specified media time in the `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod` of the child source. | | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html` | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#getWindowIndexForChildWindowIndex(T,int)( @https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull childSourceId: T!, windowIndex: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html )` Returns the window index in the composite source corresponding to the specified window index in a child source. | | `abstract https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#onChildSourceInfoRefreshed(T,androidx.media3.exoplayer.source.MediaSource,androidx.media3.common.Timeline)( @https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull childSourceId: T!, mediaSource: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource!, newTimeline: https://developer.android.com/reference/kotlin/androidx/media3/common/Timeline! )` Called when the source info of a child source has been refreshed. | | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#prepareChildSource(T,androidx.media3.exoplayer.source.MediaSource)(@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull id: T!, mediaSource: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource!)` Prepares a child source. | | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `@https://developer.android.com/reference/kotlin/androidx/annotation/CallSuper https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#prepareSourceInternal(androidx.media3.datasource.TransferListener)(mediaTransferListener: https://developer.android.com/reference/kotlin/androidx/media3/datasource/TransferListener?)` Starts source preparation and enables the source, see `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#prepareSource(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller,androidx.media3.exoplayer.analytics.PlayerId,androidx.media3.exoplayer.upstream.BandwidthMeter)`. | | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#releaseChildSource(T)(@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull id: T!)` Releases a child source. | | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `@https://developer.android.com/reference/kotlin/androidx/annotation/CallSuper https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#releaseSourceInternal()()` Releases the source, see `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#releaseSource(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller)`. | ### Inherited functions From [androidx.media3.exoplayer.source.BaseMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource) `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#addDrmEventListener(android.os.Handler,androidx.media3.exoplayer.drm.DrmSessionEventListener)( handler: https://developer.android.com/reference/android/os/Handler.html!, eventListener: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/drm/DrmSessionEventListener! )` Adds a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/drm/DrmSessionEventListener` to the list of listeners which are notified of DRM events for this media source. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#addEventListener(android.os.Handler,androidx.media3.exoplayer.source.MediaSourceEventListener)( handler: https://developer.android.com/reference/android/os/Handler.html!, eventListener: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSourceEventListener! )` Adds a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSourceEventListener` to the list of listeners which are notified of media source events. `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/drm/DrmSessionEventListener.EventDispatcher!` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#createDrmEventDispatcher(androidx.media3.exoplayer.source.MediaSource.MediaPeriodId)(mediaPeriodId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId?)` Returns a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/drm/DrmSessionEventListener.EventDispatcher` which dispatches all events to the registered listeners with the specified `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/drm/DrmSessionEventListener.EventDispatcher!` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#createDrmEventDispatcher(int,androidx.media3.exoplayer.source.MediaSource.MediaPeriodId)( windowIndex: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html, mediaPeriodId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId? )` Returns a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/drm/DrmSessionEventListener.EventDispatcher` which dispatches all events to the registered listeners with the specified window index and `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId`. `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSourceEventListener.EventDispatcher!` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#createEventDispatcher(androidx.media3.exoplayer.source.MediaSource.MediaPeriodId)(mediaPeriodId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId?)` Returns a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSourceEventListener.EventDispatcher` which dispatches all events to the registered listeners with the specified `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId`. `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSourceEventListener.EventDispatcher!` `[createEventDispatcher](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#createEventDispatcher(androidx.media3.exoplayer.source.MediaSource.MediaPeriodId,long))( mediaPeriodId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId!, mediaTimeOffsetMs: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html )` **This function is deprecated.** Use `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#createEventDispatcher(androidx.media3.exoplayer.source.MediaSource.MediaPeriodId)` instead.
`https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSourceEventListener.EventDispatcher!` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#createEventDispatcher(int,androidx.media3.exoplayer.source.MediaSource.MediaPeriodId)( windowIndex: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html, mediaPeriodId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId? )` Returns a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSourceEventListener.EventDispatcher` which dispatches all events to the registered listeners with the specified window index and `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId`. `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSourceEventListener.EventDispatcher!` `[createEventDispatcher](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#createEventDispatcher(int,androidx.media3.exoplayer.source.MediaSource.MediaPeriodId,long))( windowIndex: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html, mediaPeriodId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId?, mediaTimeOffsetMs: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html )` **This function is deprecated.** Use `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#createEventDispatcher(int,androidx.media3.exoplayer.source.MediaSource.MediaPeriodId)` instead.
`https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#disable(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller)(caller: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaSourceCaller!)` Disables the source for the creation of `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod`. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#enable(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller)(caller: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaSourceCaller!)` Enables the source for the creation of `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod`. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#isEnabled()()` Returns whether the source is enabled. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#prepareSource(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller,androidx.media3.exoplayer.analytics.PlayerId,androidx.media3.exoplayer.upstream.BandwidthMeter)( caller: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaSourceCaller!, playerId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/analytics/PlayerId!, bandwidthMeter: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/upstream/BandwidthMeter! )` Registers a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaSourceCaller`. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#prepareSourceCalled()()` Returns whether the source has `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#prepareSource(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller,androidx.media3.exoplayer.analytics.PlayerId,androidx.media3.exoplayer.upstream.BandwidthMeter)` called. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#refreshSourceInfo(androidx.media3.common.Timeline)(timeline: https://developer.android.com/reference/kotlin/androidx/media3/common/Timeline!)` Updates timeline and manifest and notifies all listeners of the update. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#releaseSource(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller)(caller: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaSourceCaller!)` Unregisters a caller, and disables and releases the source if no longer required. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#removeDrmEventListener(androidx.media3.exoplayer.drm.DrmSessionEventListener)(eventListener: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/drm/DrmSessionEventListener!)` Removes a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/drm/DrmSessionEventListener` from the list of listeners which are notified of DRM events for this media source. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#removeEventListener(androidx.media3.exoplayer.source.MediaSourceEventListener)(eventListener: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSourceEventListener!)` Removes a `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSourceEventListener` from the list of listeners which are notified of media source events. From [androidx.media3.exoplayer.source.MediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource) `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#canUpdateMediaItem(androidx.media3.common.MediaItem)(mediaItem: https://developer.android.com/reference/kotlin/androidx/media3/common/MediaItem!)` Returns whether the `https://developer.android.com/reference/kotlin/androidx/media3/common/MediaItem` for this source can be updated with the provided item. `abstract https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod!` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#createPeriod(androidx.media3.exoplayer.source.MediaSource.MediaPeriodId,androidx.media3.exoplayer.upstream.Allocator,long)( id: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId!, allocator: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/upstream/Allocator!, startPositionUs: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html )` Returns a new `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod` identified by `periodId`. `https://developer.android.com/reference/kotlin/androidx/media3/common/Timeline?` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#getInitialTimeline()()` Returns the initial placeholder timeline that is returned immediately when the real timeline is not yet known, or null to let the player create an initial timeline. `abstract https://developer.android.com/reference/kotlin/androidx/media3/common/MediaItem!` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#getMediaItem()()` Returns the `https://developer.android.com/reference/kotlin/androidx/media3/common/MediaItem` whose media is provided by the source. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#isSingleWindow()()` Returns true if the media source is guaranteed to never have zero or more than one window. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi [prepareSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#prepareSource(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller,androidx.media3.datasource.TransferListener,androidx.media3.exoplayer.analytics.PlayerId))( caller: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaSourceCaller!, mediaTransferListener: https://developer.android.com/reference/kotlin/androidx/media3/datasource/TransferListener?, playerId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/analytics/PlayerId! )` **This function is deprecated.** Use `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#prepareSource(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller,androidx.media3.exoplayer.analytics.PlayerId,androidx.media3.exoplayer.upstream.BandwidthMeter)` instead.
`abstract https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#releasePeriod(androidx.media3.exoplayer.source.MediaPeriod)(mediaPeriod: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod!)` Releases the period. `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnstableApi https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#updateMediaItem(androidx.media3.common.MediaItem)(mediaItem: https://developer.android.com/reference/kotlin/androidx/media3/common/MediaItem!)` Updates the `https://developer.android.com/reference/kotlin/androidx/media3/common/MediaItem` for this source. ### Inherited properties From [androidx.media3.exoplayer.source.BaseMediaSource](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource) `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/upstream/BandwidthMeter?` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#bandwidthMeter()` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/analytics/PlayerId?` `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#playerId()` ## Protected constructors ### CompositeMediaSource ``` protected CompositeMediaSource() ``` Creates composite media source without child sources. ## Public functions ### maybeThrowSourceInfoRefreshError ``` @CallSuper fun maybeThrowSourceInfoRefreshError(): Unit ``` Throws any pending error encountered while loading or refreshing source information. Should not be called directly from application code. This method must be called on the playback thread and only after `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#prepareSource(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller,androidx.media3.exoplayer.analytics.PlayerId,androidx.media3.exoplayer.upstream.BandwidthMeter)`. | Throws | |---|---| | `https://developer.android.com/reference/java/io/IOException.html` | | ## Protected functions ### disableChildSource ``` protected fun disableChildSource(@UnknownNull id: T!): Unit ``` Disables a child source. | Parameters | |---|---| | `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull id: T!` | The unique id used to prepare the child source. | ### disableInternal ``` @CallSuper protected fun disableInternal(): Unit ``` Disables the source, see `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#disable(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller)`. ### enableChildSource ``` protected fun enableChildSource(@UnknownNull id: T!): Unit ``` Enables a child source. | Parameters | |---|---| | `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull id: T!` | The unique id used to prepare the child source. | ### enableInternal ``` @CallSuper protected fun enableInternal(): Unit ``` Enables the source, see `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#enable(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller)`. ### getMediaPeriodIdForChildMediaPeriodId ``` protected fun getMediaPeriodIdForChildMediaPeriodId(     @UnknownNull childSourceId: T!,     mediaPeriodId: MediaSource.MediaPeriodId! ): MediaSource.MediaPeriodId? ``` Returns the `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId` in the composite source corresponding to the specified `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId` in a child source. The default implementation does not change the media period id. | Parameters | |---|---| | `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull childSourceId: T!` | The unique id used to prepare the child source. | | `mediaPeriodId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId!` | A `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId` of the child source. | | Returns | |---|---| | `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId?` | The corresponding `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId` in the composite source. Null if no corresponding media period id can be determined. | ### getMediaTimeForChildMediaTime ``` protected fun getMediaTimeForChildMediaTime(     @UnknownNull childSourceId: T!,     mediaTimeMs: Long,     mediaPeriodId: MediaSource.MediaPeriodId? ): Long ``` Returns the media time in the `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod` of the composite source corresponding to the specified media time in the `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod` of the child source. The default implementation does not change the media time. | Parameters | |---|---| | `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull childSourceId: T!` | The unique id used to prepare the child source. | | `mediaTimeMs: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html` | A media time in the `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod` of the child source, in milliseconds. | | `mediaPeriodId: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId?` | The `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource.MediaPeriodId` of the `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod` of the child source, or null if the time does not relate to a specific `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod`. | | Returns | |---|---| | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html` | The corresponding media time in the `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaPeriod` of the composite source, in milliseconds. | ### getWindowIndexForChildWindowIndex ``` protected fun getWindowIndexForChildWindowIndex(     @UnknownNull childSourceId: T!,     windowIndex: Int ): Int ``` Returns the window index in the composite source corresponding to the specified window index in a child source. The default implementation does not change the window index. | Parameters | |---|---| | `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull childSourceId: T!` | The unique id used to prepare the child source. | | `windowIndex: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html` | A window index of the child source. | | Returns | |---|---| | `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html` | The corresponding window index in the composite source. | ### onChildSourceInfoRefreshed ``` protected abstract fun onChildSourceInfoRefreshed(     @UnknownNull childSourceId: T!,     mediaSource: MediaSource!,     newTimeline: Timeline! ): Unit ``` Called when the source info of a child source has been refreshed. | Parameters | |---|---| | `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull childSourceId: T!` | The unique id used to prepare the child source. | | `mediaSource: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource!` | The child source whose source info has been refreshed. | | `newTimeline: https://developer.android.com/reference/kotlin/androidx/media3/common/Timeline!` | The timeline of the child source. | ### prepareChildSource ``` protected fun prepareChildSource(@UnknownNull id: T!, mediaSource: MediaSource!): Unit ``` Prepares a child source. `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#onChildSourceInfoRefreshed(T,androidx.media3.exoplayer.source.MediaSource,androidx.media3.common.Timeline)` will be called when the child source updates its timeline with the same `id` passed to this method. Any child sources that aren't explicitly released with `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#releaseChildSource(T)` will be released in `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/CompositeMediaSource#releaseSourceInternal()`. | Parameters | |---|---| | `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull id: T!` | A unique id to identify the child source preparation. Null is allowed as an id. | | `mediaSource: https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource!` | The child `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource`. | ### prepareSourceInternal ``` @CallSuper protected fun prepareSourceInternal(mediaTransferListener: TransferListener?): Unit ``` Starts source preparation and enables the source, see `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#prepareSource(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller,androidx.media3.exoplayer.analytics.PlayerId,androidx.media3.exoplayer.upstream.BandwidthMeter)`. This method is called at most once until the next call to `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#releaseSourceInternal()`. This method is called on the playback thread. | Parameters | |---|---| | `mediaTransferListener: https://developer.android.com/reference/kotlin/androidx/media3/datasource/TransferListener?` | The transfer listener which should be informed of any media data transfers. May be null if no listener is available. Note that this listener should usually be only informed of transfers related to the media loads and not of auxiliary loads for manifests and other data. | ### releaseChildSource ``` protected fun releaseChildSource(@UnknownNull id: T!): Unit ``` Releases a child source. | Parameters | |---|---| | `@https://developer.android.com/reference/kotlin/androidx/media3/common/util/UnknownNull id: T!` | The unique id used to prepare the child source. | ### releaseSourceInternal ``` @CallSuper protected fun releaseSourceInternal(): Unit ``` Releases the source, see `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/MediaSource#releaseSource(androidx.media3.exoplayer.source.MediaSource.MediaSourceCaller)`. This method is called exactly once after each call to `https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/BaseMediaSource#prepareSourceInternal(androidx.media3.datasource.TransferListener)`. This method is called on the playback thread.