MappingTrackSelector

Artifact: androidx.media3:media3-exoplayer

Kotlin |Java

@UnstableApi
abstract class MappingTrackSelector : TrackSelector

kotlin.Any
↳	androidx.media3.exoplayer.trackselection.TrackSelector
	↳	androidx.media3.exoplayer.trackselection.MappingTrackSelector

Known direct subclasses

DefaultTrackSelector

DefaultTrackSelector

A default TrackSelector suitable for most use cases.

Known indirect subclasses

FakeTrackSelector

FakeTrackSelector

A fake MappingTrackSelector that returns FakeTrackSelections.

Base class for TrackSelectors that first establish a mapping between TrackGroups and Renderers, and then from that mapping create a ExoTrackSelection for each renderer.

Summary

Nested types
`class MappingTrackSelector.MappedTrackInfo` Provides mapped track information for each renderer.
`@Documented @Retention(value = RetentionPolicy.SOURCE) @Target(value = ) @IntDef(value = ) annotation MappingTrackSelector.MappedTrackInfo.RendererSupport` Levels of renderer support.

Public constructors
`MappingTrackSelector()`

Public functions
`Unit`	`onSelectionActivated(info: Any?)` Called by the player when a `TrackSelectorResult` previously generated by `selectTracks` is activated.
`TrackSelectorResult!`	`selectTracks( rendererCapabilities: Array<RendererCapabilities!>!, trackGroups: TrackGroupArray!, periodId: MediaSource.MediaPeriodId!, timeline: Timeline! )` Called by the player to perform a track selection.

Protected functions
`abstract Pair<Array<@NullableType RendererConfiguration!>!, Array<@NullableType ExoTrackSelection!>!>!`	`selectTracks( mappedTrackInfo: MappingTrackSelector.MappedTrackInfo!, @RendererCapabilities.Capabilities rendererFormatSupports: Array<Array<IntArray!>!>!, @RendererCapabilities.AdaptiveSupport rendererMixedMimeTypeAdaptationSupport: IntArray!, mediaPeriodId: MediaSource.MediaPeriodId!, timeline: Timeline! )` Given mapped track information, returns a track selection and configuration for each renderer.

Protected functions

abstract Pair<Array<@NullableType RendererConfiguration!>!, Array<@NullableType ExoTrackSelection!>!>!

selectTracks(
    mappedTrackInfo: MappingTrackSelector.MappedTrackInfo!,
    @RendererCapabilities.Capabilities rendererFormatSupports: Array<Array<IntArray!>!>!,
    @RendererCapabilities.AdaptiveSupport rendererMixedMimeTypeAdaptationSupport: IntArray!,
    mediaPeriodId: MediaSource.MediaPeriodId!,
    timeline: Timeline!
)

Given mapped track information, returns a track selection and configuration for each renderer.

Public properties
`MappingTrackSelector.MappedTrackInfo?`	`currentMappedTrackInfo`

Inherited functions

From androidx.media3.exoplayer.trackselection.TrackSelector

`TrackSelectionParameters!`	`getParameters()` Returns the current parameters for track selection.
`RendererCapabilities.Listener?`	`getRendererCapabilitiesListener()` Returns the `RendererCapabilities.Listener` that the concrete instance uses to listen to the renderer capabilities changes.
`Unit`	`@CallSuper init( listener: TrackSelector.InvalidationListener!, bandwidthMeter: BandwidthMeter! )` Called by the player to initialize the selector.
`Unit`	`invalidate()` Calls `onTrackSelectionsInvalidated` to invalidate all previously generated track selections.
`Unit`	`invalidateForRendererCapabilitiesChange(renderer: Renderer!)` Calls `onRendererCapabilitiesChanged` to invalidate all previously generated track selections because a renderer's capabilities have changed.
`Boolean`	`isSetParametersSupported()` Returns if this `TrackSelector` supports `setParameters`.
`Unit`	`@CallSuper release()` Called by the player to release the selector.
`Unit`	`setAudioAttributes(audioAttributes: AudioAttributes!)` Called by the player to set the `AudioAttributes` that will be used for playback.
`Unit`	`setParameters(parameters: TrackSelectionParameters!)` Called by the player to provide parameters for track selection.

Inherited properties

From androidx.media3.exoplayer.trackselection.TrackSelector

BandwidthMeter?

bandwidthMeter

Public constructors