DashMediaSource

Artifact: androidx.media3:media3-exoplayer-dash

View Source

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Kotlin |Java

@UnstableApi
public final class DashMediaSource extends BaseMediaSource

java.lang.Object
↳	androidx.media3.exoplayer.source.BaseMediaSource
	↳	androidx.media3.exoplayer.dash.DashMediaSource

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A DASH MediaSource.

Summary

Nested types
public final class DashMediaSource.Factory implements MediaSourceFactory Factory for DashMediaSources.

Constants
static final long	DEFAULT_FALLBACK_TARGET_LIVE_OFFSET_MS = 30000 The default target offset for live streams that is used if no value is defined in the MediaItem or the manifest.
static final String	DEFAULT_MEDIA_ID = "DashMediaSource" The media id used by media items of dash media sources without a manifest URI.
static final long	MIN_LIVE_DEFAULT_START_POSITION_US = 5000000 The minimum default start position for live streams, in microseconds relative to the start of the live window.

Public fields
MediaItem	@GuardedBy(value = "this") mediaItem

Public methods
boolean	canUpdateMediaItem(MediaItem mediaItem) Returns whether the MediaItem for this source can be updated with the provided item.
MediaPeriod	createPeriod(     MediaSource.MediaPeriodId id,     Allocator allocator,     long startPositionUs ) Returns a new MediaPeriod identified by periodId.
synchronized MediaItem	getMediaItem() Returns the MediaItem whose media is provided by the source.
void	maybeThrowSourceInfoRefreshError() Throws any pending error encountered while loading or refreshing source information.
void	releasePeriod(MediaPeriod mediaPeriod) Releases the period.
void	replaceManifestUri(Uri manifestUri) Manually replaces the manifest Uri.
synchronized void	updateMediaItem(MediaItem mediaItem) Updates the MediaItem for this source.

Protected methods
void	prepareSourceInternal(@Nullable TransferListener mediaTransferListener) Starts source preparation and enables the source, see prepareSource.
void	releaseSourceInternal() Releases the source, see releaseSource.

Inherited fields
From androidx.media3.exoplayer.source.BaseMediaSource @Nullable PlayerId playerId

Inherited methods
From androidx.media3.exoplayer.source.BaseMediaSource final void @UnstableApi addDrmEventListener(     Handler handler,     DrmSessionEventListener eventListener ) Adds a DrmSessionEventListener to the list of listeners which are notified of DRM events for this media source. final void @UnstableApi addEventListener(     Handler handler,     MediaSourceEventListener eventListener ) Adds a MediaSourceEventListener to the list of listeners which are notified of media source events. final DrmSessionEventListener.EventDispatcher createDrmEventDispatcher(     @Nullable MediaSource.MediaPeriodId mediaPeriodId ) Returns a DrmSessionEventListener.EventDispatcher which dispatches all events to the registered listeners with the specified MediaPeriodId final DrmSessionEventListener.EventDispatcher createDrmEventDispatcher(     int windowIndex,     @Nullable MediaSource.MediaPeriodId mediaPeriodId ) Returns a DrmSessionEventListener.EventDispatcher which dispatches all events to the registered listeners with the specified window index and MediaPeriodId. final MediaSourceEventListener.EventDispatcher createEventDispatcher(@Nullable MediaSource.MediaPeriodId mediaPeriodId) Returns a MediaSourceEventListener.EventDispatcher which dispatches all events to the registered listeners with the specified MediaPeriodId. final MediaSourceEventListener.EventDispatcher createEventDispatcher(     MediaSource.MediaPeriodId mediaPeriodId,     long mediaTimeOffsetMs ) This method is deprecated. Use createEventDispatcher instead. final MediaSourceEventListener.EventDispatcher createEventDispatcher(     int windowIndex,     @Nullable MediaSource.MediaPeriodId mediaPeriodId ) Returns a MediaSourceEventListener.EventDispatcher which dispatches all events to the registered listeners with the specified window index and MediaPeriodId. final MediaSourceEventListener.EventDispatcher createEventDispatcher(     int windowIndex,     @Nullable MediaSource.MediaPeriodId mediaPeriodId,     long mediaTimeOffsetMs ) This method is deprecated. Use createEventDispatcher instead. final void @UnstableApi disable(MediaSource.MediaSourceCaller caller) Disables the source for the creation of MediaPeriods. void disableInternal() Disables the source, see disable. final void @UnstableApi enable(MediaSource.MediaSourceCaller caller) Enables the source for the creation of MediaPeriods. void enableInternal() Enables the source, see enable. final PlayerId getPlayerId() Returns the PlayerId of the player using this media source. final boolean isEnabled() Returns whether the source is enabled. final void @UnstableApi prepareSource(     MediaSource.MediaSourceCaller caller,     @Nullable TransferListener mediaTransferListener ) This method is deprecated. Implement prepareSource instead. final void @UnstableApi prepareSource(     MediaSource.MediaSourceCaller caller,     @Nullable TransferListener mediaTransferListener,     PlayerId playerId ) Registers a MediaSourceCaller. final boolean prepareSourceCalled() Returns whether the source has prepareSource called. final void refreshSourceInfo(Timeline timeline) Updates timeline and manifest and notifies all listeners of the update. final void @UnstableApi releaseSource(MediaSource.MediaSourceCaller caller) Unregisters a caller, and disables and releases the source if no longer required. final void @UnstableApi removeDrmEventListener(DrmSessionEventListener eventListener) Removes a DrmSessionEventListener from the list of listeners which are notified of DRM events for this media source. final void @UnstableApi removeEventListener(MediaSourceEventListener eventListener) Removes a MediaSourceEventListener from the list of listeners which are notified of media source events. final void setPlayerId(PlayerId playerId) Sets the PlayerId of the player using this media source.
From androidx.media3.exoplayer.source.MediaSource @Nullable Timeline @UnstableApi 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. boolean @UnstableApi isSingleWindow() Returns true if the media source is guaranteed to never have zero or more than one window.

Constants

DEFAULT_FALLBACK_TARGET_LIVE_OFFSET_MS

public static final long DEFAULT_FALLBACK_TARGET_LIVE_OFFSET_MS = 30000

The default target offset for live streams that is used if no value is defined in the MediaItem or the manifest.

DEFAULT_MEDIA_ID

public static final String DEFAULT_MEDIA_ID = "DashMediaSource"

The media id used by media items of dash media sources without a manifest URI.

MIN_LIVE_DEFAULT_START_POSITION_US

public static final long MIN_LIVE_DEFAULT_START_POSITION_US = 5000000

The minimum default start position for live streams, in microseconds relative to the start of the live window.

Public fields

mediaItem

@GuardedBy(value = "this")
public MediaItem mediaItem

Public methods

canUpdateMediaItem

public boolean canUpdateMediaItem(MediaItem mediaItem)

Returns whether the MediaItem for this source can be updated with the provided item.

Should not be called directly from application code.

This method must be called on the application thread.

Parameters
MediaItem mediaItem	The new MediaItem.

Returns
boolean	Whether the source can be updated using this item.

createPeriod

public MediaPeriod createPeriod(
    MediaSource.MediaPeriodId id,
    Allocator allocator,
    long startPositionUs
)

Returns a new MediaPeriod identified by periodId.

Should not be called directly from application code.

This method must be called on the playback thread and only if the source is enabled.

Parameters
MediaSource.MediaPeriodId id	The identifier of the period.
Allocator allocator	An Allocator from which to obtain media buffer allocations.
long startPositionUs	The expected start position, in microseconds.

Returns
MediaPeriod	A new MediaPeriod.

getMediaItem

synchronized public MediaItem getMediaItem()

Returns the MediaItem whose media is provided by the source.

Should not be called directly from application code.

This method must be called on the application thread.

maybeThrowSourceInfoRefreshError

public void maybeThrowSourceInfoRefreshError()

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 prepareSource.

Throws
java.io.IOException

releasePeriod

public void releasePeriod(MediaPeriod mediaPeriod)

Releases the period.

Should not be called directly from application code.

This method must be called on the playback thread.

Parameters
MediaPeriod mediaPeriod	The period to release.

replaceManifestUri

public void replaceManifestUri(Uri manifestUri)

Manually replaces the manifest Uri.

Parameters
Uri manifestUri	The replacement manifest Uri.

updateMediaItem

synchronized public void updateMediaItem(MediaItem mediaItem)

Updates the MediaItem for this source.

Should not be called directly from application code.

This method must be called on the playback thread and only if canUpdateMediaItem returns true for the new MediaItem.

Parameters
MediaItem mediaItem	The new MediaItem.

Protected methods

prepareSourceInternal

protected void prepareSourceInternal(@Nullable TransferListener mediaTransferListener)

Starts source preparation and enables the source, see prepareSource. This method is called at most once until the next call to releaseSourceInternal.

Parameters
@Nullable TransferListener mediaTransferListener	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.

releaseSourceInternal

protected void releaseSourceInternal()

Releases the source, see releaseSource. This method is called exactly once after each call to prepareSourceInternal.