com.google.android.exoplayer2.source

Class ClippingMediaSource

java.lang.Object

com.google.android.exoplayer2.source.BaseMediaSource

com.google.android.exoplayer2.source.CompositeMediaSource<java.lang.Void>

com.google.android.exoplayer2.source.ClippingMediaSource

All Implemented Interfaces:

MediaSource

public final class ClippingMediaSource
extends CompositeMediaSource<java.lang.Void>

MediaSource that wraps a source and clips its timeline based on specified start/end positions. The wrapped source must consist of a single period.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ClippingMediaSource.IllegalClippingException Thrown when a ClippingMediaSource cannot clip its wrapped source.

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

MediaSource.MediaPeriodId, MediaSource.SourceInfoRefreshListener

Constructor Summary

Constructors

Constructor and Description
ClippingMediaSource(MediaSource mediaSource, long durationUs) Creates a new clipping source that wraps the specified source and provides samples from the default position for the specified duration.
ClippingMediaSource(MediaSource mediaSource, long startPositionUs, long endPositionUs) Creates a new clipping source that wraps the specified source and provides samples between the specified start and end position.
ClippingMediaSource(MediaSource mediaSource, long startPositionUs, long endPositionUs, boolean enableInitialDiscontinuity) Deprecated.
ClippingMediaSource(MediaSource mediaSource, long startPositionUs, long endPositionUs, boolean enableInitialDiscontinuity, boolean allowDynamicClippingUpdates, boolean relativeToDefaultPosition) Creates a new clipping source that wraps the specified source.

Method Summary

Modifier and Type	Method and Description
MediaPeriod	createPeriod(MediaSource.MediaPeriodId id, Allocator allocator, long startPositionUs) Returns a new MediaPeriod identified by periodId.
protected long	getMediaTimeForChildMediaTime(java.lang.Void id, long mediaTimeMs) Returns the media time in the composite source corresponding to the specified media time in a child source.
java.lang.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.
protected void	onChildSourceInfoRefreshed(java.lang.Void id, MediaSource mediaSource, Timeline timeline, java.lang.Object manifest) Called when the source info of a child source has been refreshed.
void	prepareSourceInternal(TransferListener mediaTransferListener) Starts source preparation.
void	releasePeriod(MediaPeriod mediaPeriod) Releases the period.
void	releaseSourceInternal() Releases the source.

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

getMediaPeriodIdForChildMediaPeriodId, getWindowIndexForChildWindowIndex, prepareChildSource, releaseChildSource

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

addEventListener, createEventDispatcher, createEventDispatcher, createEventDispatcher, prepareSource, refreshSourceInfo, releaseSource, removeEventListener

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ClippingMediaSource

public ClippingMediaSource(MediaSource mediaSource,
                           long startPositionUs,
                           long endPositionUs)

Creates a new clipping source that wraps the specified source and provides samples between the specified start and end position.

Parameters:

mediaSource - The single-period source to wrap.

startPositionUs - The start position within mediaSource's window at which to start providing samples, in microseconds.

endPositionUs - The end position within mediaSource's window at which to stop providing samples, in microseconds. Specify C.TIME_END_OF_SOURCE to provide samples from the specified start point up to the end of the source. Specifying a position that exceeds the mediaSource's duration will also result in the end of the source not being clipped.

ClippingMediaSource

@Deprecated
public ClippingMediaSource(MediaSource mediaSource,
                                       long startPositionUs,
                                       long endPositionUs,
                                       boolean enableInitialDiscontinuity)

Deprecated.

Creates a new clipping source that wraps the specified source and provides samples between the specified start and end position.

Parameters:

mediaSource - The single-period source to wrap.

startPositionUs - The start position within mediaSource's window at which to start providing samples, in microseconds.

endPositionUs - The end position within mediaSource's window at which to stop providing samples, in microseconds. Specify C.TIME_END_OF_SOURCE to provide samples from the specified start point up to the end of the source. Specifying a position that exceeds the mediaSource's duration will also result in the end of the source not being clipped.

enableInitialDiscontinuity - Whether the initial discontinuity should be enabled.

ClippingMediaSource

public ClippingMediaSource(MediaSource mediaSource,
                           long durationUs)

Creates a new clipping source that wraps the specified source and provides samples from the default position for the specified duration.

Parameters:

mediaSource - The single-period source to wrap.

durationUs - The duration from the default position in the window in mediaSource's timeline at which to stop providing samples. Specifying a duration that exceeds the mediaSource's duration will result in the end of the source not being clipped.

ClippingMediaSource

public ClippingMediaSource(MediaSource mediaSource,
                           long startPositionUs,
                           long endPositionUs,
                           boolean enableInitialDiscontinuity,
                           boolean allowDynamicClippingUpdates,
                           boolean relativeToDefaultPosition)

Creates a new clipping source that wraps the specified source.

If the start point is guaranteed to be a key frame, pass false to enableInitialPositionDiscontinuity to suppress an initial discontinuity when a period is first read from.

For live streams, if the clipping positions should move with the live window, pass true to allowDynamicClippingUpdates. Otherwise, the live stream ends when the playback reaches endPositionUs in the last reported live window at the time a media period was created.

Parameters:

mediaSource - The single-period source to wrap.

startPositionUs - The start position at which to start providing samples, in microseconds. If relativeToDefaultPosition is false, this position is relative to the start of the window in mediaSource's timeline. If relativeToDefaultPosition is true, this position is relative to the default position in the window in mediaSource's timeline.

endPositionUs - The end position at which to stop providing samples, in microseconds. Specify C.TIME_END_OF_SOURCE to provide samples from the specified start point up to the end of the source. Specifying a position that exceeds the mediaSource's duration will also result in the end of the source not being clipped. If relativeToDefaultPosition is false, the specified position is relative to the start of the window in mediaSource's timeline. If relativeToDefaultPosition is true, this position is relative to the default position in the window in mediaSource's timeline.

enableInitialDiscontinuity - Whether the initial discontinuity should be enabled.

allowDynamicClippingUpdates - Whether the clipping of active media periods moves with a live window. If false, playback ends when it reaches endPositionUs in the last reported live window at the time a media period was created.

relativeToDefaultPosition - Whether startPositionUs and endPositionUs are relative to the default position in the window in mediaSource's timeline.

Method Detail

getTag

@Nullable
public java.lang.Object getTag()

Description copied from interface: MediaSource

Returns the tag set on the media source, or null if none was set.

prepareSourceInternal

public void prepareSourceInternal(@Nullable
                                  TransferListener mediaTransferListener)

Description copied from class: BaseMediaSource

Starts source preparation. This method is called at most once until the next call to BaseMediaSource.releaseSourceInternal().

Overrides:

prepareSourceInternal in class CompositeMediaSource<java.lang.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.

maybeThrowSourceInfoRefreshError

public void maybeThrowSourceInfoRefreshError()
                                      throws java.io.IOException

Description copied from interface: MediaSource

Throws any pending error encountered while loading or refreshing source information.

Should not be called directly from application code.

Specified by:

maybeThrowSourceInfoRefreshError in interface MediaSource

Overrides:

maybeThrowSourceInfoRefreshError in class CompositeMediaSource<java.lang.Void>

Throws:

java.io.IOException

createPeriod

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

Description copied from interface: MediaSource

Returns a new MediaPeriod identified by periodId. This method may be called multiple times without an intervening call to MediaSource.releasePeriod(MediaPeriod).

Should not be called directly from application code.

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. This method is called exactly once after each call to BaseMediaSource.prepareSourceInternal(TransferListener).

Overrides:

releaseSourceInternal in class CompositeMediaSource<java.lang.Void>

onChildSourceInfoRefreshed

protected void onChildSourceInfoRefreshed(java.lang.Void id,
                                          MediaSource mediaSource,
                                          Timeline timeline,
                                          @Nullable
                                          java.lang.Object manifest)

Description copied from class: CompositeMediaSource

Called when the source info of a child source has been refreshed.

Specified by:

onChildSourceInfoRefreshed in class CompositeMediaSource<java.lang.Void>

Parameters:

id - The unique id used to prepare the child source.

mediaSource - The child source whose source info has been refreshed.

timeline - The timeline of the child source.

manifest - The manifest of the child source.

getMediaTimeForChildMediaTime

protected long getMediaTimeForChildMediaTime(java.lang.Void id,
                                             long mediaTimeMs)

Description copied from class: CompositeMediaSource

Returns the media time in the composite source corresponding to the specified media time in a child source. The default implementation does not change the media time.

Overrides:

getMediaTimeForChildMediaTime in class CompositeMediaSource<java.lang.Void>

Parameters:

id - The unique id used to prepare the child source.

mediaTimeMs - A media time of the child source, in milliseconds.

Returns:

The corresponding media time in the composite source, in milliseconds.