MediaSource (ExoPlayer library)

All Known Implementing Classes:

AdsMediaSource, BaseMediaSource, ClippingMediaSource, CompositeMediaSource, ConcatenatingMediaSource, DashMediaSource, ExtractorMediaSource, FakeAdaptiveMediaSource, FakeMediaSource, HlsMediaSource, LoopingMediaSource, MaskingMediaSource, MergingMediaSource, ProgressiveMediaSource, SilenceMediaSource, SingleSampleMediaSource, SsMediaSource
```
public interface MediaSource
```
Defines and provides media to be played by an ExoPlayer. A MediaSource has two main responsibilities:
- To provide the player with a Timeline defining the structure of its media, and to provide a new timeline whenever the structure of the media changes. The MediaSource provides these timelines by calling MediaSource.MediaSourceCaller.onSourceInfoRefreshed(com.google.android.exoplayer2.source.MediaSource, com.google.android.exoplayer2.Timeline) on the MediaSource.MediaSourceCallers passed to prepareSource(MediaSourceCaller, TransferListener).
- To provide MediaPeriod instances for the periods in its timeline. MediaPeriods are obtained by calling createPeriod(MediaPeriodId, Allocator, long), and provide a way for the player to load and read the media.
All methods are called on the player's internal playback thread, as described in the ExoPlayer Javadoc. They should not be called directly from application code. Instances can be re-used, but only for one ExoPlayer instance simultaneously.

Nested Class Summary

Nested Classes
Modifier and Type	Interface and Description
`static class`	`MediaSource.MediaPeriodId` Identifier for a `MediaPeriod`.
`static interface`	`MediaSource.MediaSourceCaller` A caller of media sources, which will be notified of source events.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`void`	`addEventListener(Handler handler, MediaSourceEventListener eventListener)` Adds a `MediaSourceEventListener` to the list of listeners which are notified of media source events.
`MediaPeriod`	`createPeriod(MediaSource.MediaPeriodId id, Allocator allocator, long startPositionUs)` Returns a new `MediaPeriod` identified by `periodId`.
`void`	`disable(MediaSource.MediaSourceCaller caller)` Disables the source for the creation of `MediaPeriods`.
`void`	`enable(MediaSource.MediaSourceCaller caller)` Enables the source for the creation of `MediaPeriods`.
`default Object`	`getTag()` Returns the tag set on the media source, or null if none was set.
`void`	`maybeThrowSourceInfoRefreshError()` Throws any pending error encountered while loading or refreshing source information.
`void`	`prepareSource(MediaSource.MediaSourceCaller caller, TransferListener mediaTransferListener)` Registers a `MediaSource.MediaSourceCaller`.
`void`	`releasePeriod(MediaPeriod mediaPeriod)` Releases the period.
`void`	`releaseSource(MediaSource.MediaSourceCaller caller)` Unregisters a caller, and disables and releases the source if no longer required.
`void`	`removeEventListener(MediaSourceEventListener eventListener)` Removes a `MediaSourceEventListener` from the list of listeners which are notified of media source events.

- Method Detail
  - addEventListener
```
void addEventListener(Handler handler,
                      MediaSourceEventListener eventListener)
```
    Adds a MediaSourceEventListener to the list of listeners which are notified of media source events.
    
    Parameters:
    
    handler - A handler on the which listener events will be posted.
    
    eventListener - The listener to be added.
  - removeEventListener
```
void removeEventListener(MediaSourceEventListener eventListener)
```
    Removes a MediaSourceEventListener from the list of listeners which are notified of media source events.
    
    Parameters:
    
    eventListener - The listener to be removed.
  - getTag
```
@Nullable
default Object getTag()
```
    Returns the tag set on the media source, or null if none was set.
  - prepareSource
```
void prepareSource(MediaSource.MediaSourceCaller caller,
                   @Nullable
                   TransferListener mediaTransferListener)
```
    Registers a MediaSource.MediaSourceCaller. Starts source preparation if needed and enables the source for the creation of MediaPerods.
    Should not be called directly from application code.
    MediaSource.MediaSourceCaller.onSourceInfoRefreshed(MediaSource, Timeline) will be called once the source has a Timeline.
    For each call to this method, a call to releaseSource(MediaSourceCaller) is needed to remove the caller and to release the source if no longer required.
    
    Parameters:
    
    caller - The MediaSource.MediaSourceCaller to be registered.
    
    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 be only informed of transfers related to the media loads and not of auxiliary loads for manifests and other data.
  - maybeThrowSourceInfoRefreshError
```
void maybeThrowSourceInfoRefreshError()
                               throws IOException
```
    Throws any pending error encountered while loading or refreshing source information.
    Should not be called directly from application code.
    Must only be called after prepareSource(MediaSourceCaller, TransferListener).
    
    Throws:
    
    IOException
  - enable
```
void enable(MediaSource.MediaSourceCaller caller)
```
    Enables the source for the creation of MediaPeriods.
    Should not be called directly from application code.
    Must only be called after prepareSource(MediaSourceCaller, TransferListener).
    
    Parameters:
    
    caller - The MediaSource.MediaSourceCaller enabling the source.
  - createPeriod
```
MediaPeriod createPeriod(MediaSource.MediaPeriodId id,
                         Allocator allocator,
                         long startPositionUs)
```
    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
```
void releasePeriod(MediaPeriod mediaPeriod)
```
    Releases the period.
    Should not be called directly from application code.
    
    Parameters:
    
    mediaPeriod - The period to release.
  - disable
```
void disable(MediaSource.MediaSourceCaller caller)
```
    Disables the source for the creation of MediaPeriods. The implementation should not hold onto limited resources used for the creation of media periods.
    Should not be called directly from application code.
    Must only be called after all MediaPeriods previously created by createPeriod(MediaPeriodId, Allocator, long) have been released by releasePeriod(MediaPeriod).
    
    Parameters:
    
    caller - The MediaSource.MediaSourceCaller disabling the source.
  - releaseSource
```
void releaseSource(MediaSource.MediaSourceCaller caller)
```
    Unregisters a caller, and disables and releases the source if no longer required.
    Should not be called directly from application code.
    Must only be called if all created MediaPeriods have been released by releasePeriod(MediaPeriod).
    
    Parameters:
    
    caller - The MediaSource.MediaSourceCaller to be unregistered.

Interface MediaSource

Nested Class Summary

Method Summary

Method Detail

addEventListener

removeEventListener

getTag

prepareSource

maybeThrowSourceInfoRefreshError

enable

createPeriod

releasePeriod

disable

releaseSource