java.lang.Object
- com.google.android.exoplayer2.source.BaseMediaSource
- - com.google.android.exoplayer2.source.CompositeMediaSource<Void>
  - - com.google.android.exoplayer2.source.MaskingMediaSource

All Implemented Interfaces:

MediaSource
```
public final class MaskingMediaSource
extends CompositeMediaSource<Void>
```
A MediaSource that masks the Timeline with a placeholder until the actual media structure is known.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class MaskingMediaSource.PlaceholderTimeline
A timeline with one dynamic window with a period of indeterminate duration.
- Nested classes/interfaces inherited from interface com.google.android.exoplayer2.source.MediaSource
  MediaSource.MediaPeriodId, MediaSource.MediaSourceCaller

Constructor Summary

Constructors
Constructor Description

MaskingMediaSource(MediaSource mediaSource, boolean useLazyPreparation)
Creates the masking media source.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`MaskingMediaPeriod`	`createPeriod(MediaSource.MediaPeriodId id, Allocator allocator, long startPositionUs)`	Returns a new `MediaPeriod` identified by `periodId`.
`MediaItem`	`getMediaItem()`	Returns the `MediaItem` whose media is provided by the source.
`protected MediaSource.MediaPeriodId`	`getMediaPeriodIdForChildMediaPeriodId(Void id, MediaSource.MediaPeriodId mediaPeriodId)`	Returns the `MediaSource.MediaPeriodId` in the composite source corresponding to the specified `MediaSource.MediaPeriodId` in a child source.
`Timeline`	`getTimeline()`	Returns the `Timeline`.
`void`	`maybeThrowSourceInfoRefreshError()`	Throws any pending error encountered while loading or refreshing source information.
`protected void`	`onChildSourceInfoRefreshed(Void id, MediaSource mediaSource, Timeline newTimeline)`	Called when the source info of a child source has been refreshed.
`void`	`prepareSourceInternal(TransferListener mediaTransferListener)`	Starts source preparation and enables the source, see `BaseMediaSource.prepareSource(MediaSourceCaller, TransferListener)`.
`void`	`releasePeriod(MediaPeriod mediaPeriod)`	Releases the period.
`void`	`releaseSourceInternal()`	Releases the source, see `BaseMediaSource.releaseSource(MediaSourceCaller)`.

Methods inherited from class com.google.android.exoplayer2.source.CompositeMediaSource
disableChildSource, disableInternal, enableChildSource, enableInternal, getMediaTimeForChildMediaTime, getWindowIndexForChildWindowIndex, prepareChildSource, releaseChildSource

Methods inherited from class com.google.android.exoplayer2.source.BaseMediaSource
addDrmEventListener, addEventListener, createDrmEventDispatcher, createDrmEventDispatcher, createEventDispatcher, createEventDispatcher, createEventDispatcher, disable, enable, isEnabled, prepareSource, refreshSourceInfo, releaseSource, removeDrmEventListener, removeEventListener

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.google.android.exoplayer2.source.MediaSource
getInitialTimeline, isSingleWindow

- Constructor Detail
  - MaskingMediaSource
```
public MaskingMediaSource(MediaSource mediaSource,
                          boolean useLazyPreparation)
```
    Creates the masking media source.
    
    Parameters:
    
    mediaSource - A MediaSource.
    
    useLazyPreparation - Whether the mediaSource is prepared lazily. If false, all manifest loads and other initial preparation steps happen immediately. If true, these initial preparations are triggered only when the player starts buffering the media.
- Method Detail
  - getTimeline
```
public Timeline getTimeline()
```
    Returns the Timeline.
  - prepareSourceInternal
```
public void prepareSourceInternal(@Nullable
                                  TransferListener mediaTransferListener)
```
    Description copied from class: BaseMediaSource
    
    Starts source preparation and enables the source, see BaseMediaSource.prepareSource(MediaSourceCaller, TransferListener). This method is called at most once until the next call to BaseMediaSource.releaseSourceInternal().
    
    Overrides:
    
    prepareSourceInternal in class CompositeMediaSource<Void>
    
    Parameters:
    
    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.
  - getMediaItem
```
public MediaItem getMediaItem()
```
    Description copied from interface: MediaSource
    
    Returns the MediaItem whose media is provided by the source.
  - maybeThrowSourceInfoRefreshError
```
public void maybeThrowSourceInfoRefreshError()
```
    Description copied from interface: MediaSource
    
    Throws any pending error encountered while loading or refreshing source information.
    Should not be called directly from application code.
    Must only be called after MediaSource.prepareSource(MediaSourceCaller, TransferListener).
    
    Specified by:
    
    maybeThrowSourceInfoRefreshError in interface MediaSource
    
    Overrides:
    
    maybeThrowSourceInfoRefreshError in class CompositeMediaSource<Void>
  - createPeriod
```
public MaskingMediaPeriod createPeriod(MediaSource.MediaPeriodId id,
                                       Allocator allocator,
                                       long startPositionUs)
```
    Description copied from interface: MediaSource
    
    Returns a new MediaPeriod identified by periodId.
    Should not be called directly from application code.
    Must only be called if the source is enabled.
    
    Parameters:
    
    id - The identifier of the period.
    
    allocator - An Allocator from which to obtain media buffer allocations.
    
    startPositionUs - The expected start position, in microseconds.
    
    Returns:
    
    A new MediaPeriod.
  - releasePeriod
```
public void releasePeriod(MediaPeriod mediaPeriod)
```
    Description copied from interface: MediaSource
    
    Releases the period.
    Should not be called directly from application code.
    
    Parameters:
    
    mediaPeriod - The period to release.
  - releaseSourceInternal
```
public void releaseSourceInternal()
```
    Description copied from class: BaseMediaSource
    
    Releases the source, see BaseMediaSource.releaseSource(MediaSourceCaller). This method is called exactly once after each call to BaseMediaSource.prepareSourceInternal(TransferListener).
    
    Overrides:
    
    releaseSourceInternal in class CompositeMediaSource<Void>
  - onChildSourceInfoRefreshed
```
protected void onChildSourceInfoRefreshed(Void id,
                                          MediaSource mediaSource,
                                          Timeline newTimeline)
```
    Description copied from class: CompositeMediaSource
    
    Called when the source info of a child source has been refreshed.
    
    Specified by:
    
    onChildSourceInfoRefreshed in class CompositeMediaSource<Void>
    
    Parameters:
    
    id - The unique id used to prepare the child source.
    
    mediaSource - The child source whose source info has been refreshed.
    
    newTimeline - The timeline of the child source.
  - getMediaPeriodIdForChildMediaPeriodId
```
@Nullable
protected MediaSource.MediaPeriodId getMediaPeriodIdForChildMediaPeriodId(Void id,
                                                                          MediaSource.MediaPeriodId mediaPeriodId)
```
    Description copied from class: CompositeMediaSource
    
    Returns the MediaSource.MediaPeriodId in the composite source corresponding to the specified MediaSource.MediaPeriodId in a child source. The default implementation does not change the media period id.
    
    Overrides:
    
    getMediaPeriodIdForChildMediaPeriodId in class CompositeMediaSource<Void>
    
    Parameters:
    
    id - The unique id used to prepare the child source.
    
    mediaPeriodId - A MediaSource.MediaPeriodId of the child source.
    
    Returns:
    
    The corresponding MediaSource.MediaPeriodId in the composite source. Null if no corresponding media period id can be determined.

Class MaskingMediaSource

Nested Class Summary

Nested classes/interfaces inherited from interface com.google.android.exoplayer2.source.MediaSource

Constructor Summary

Method Summary

Methods inherited from class com.google.android.exoplayer2.source.CompositeMediaSource

Methods inherited from class com.google.android.exoplayer2.source.BaseMediaSource

Methods inherited from class java.lang.Object

Methods inherited from interface com.google.android.exoplayer2.source.MediaSource

Constructor Detail

MaskingMediaSource

Method Detail

getTimeline

prepareSourceInternal

getMediaItem

maybeThrowSourceInfoRefreshError

createPeriod

releasePeriod

releaseSourceInternal

onChildSourceInfoRefreshed

getMediaPeriodIdForChildMediaPeriodId