com.google.android.exoplayer2.trackselection

Class RandomTrackSelection

java.lang.Object

com.google.android.exoplayer2.trackselection.BaseTrackSelection

com.google.android.exoplayer2.trackselection.RandomTrackSelection

All Implemented Interfaces:

TrackSelection

public final class RandomTrackSelection
extends BaseTrackSelection

A TrackSelection whose selected track is updated randomly.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RandomTrackSelection.Factory Factory for RandomTrackSelection instances.

Field Summary

Fields inherited from class com.google.android.exoplayer2.trackselection.BaseTrackSelection

group, length, tracks

Constructor Summary

Constructors

Constructor and Description
RandomTrackSelection(TrackGroup group, int... tracks)
RandomTrackSelection(TrackGroup group, int[] tracks, long seed)
RandomTrackSelection(TrackGroup group, int[] tracks, java.util.Random random)

Method Summary

Modifier and Type	Method and Description
int	getSelectedIndex() Returns the index of the selected track.
java.lang.Object	getSelectionData() Returns optional data associated with the current track selection.
int	getSelectionReason() Returns the reason for the current track selection.
void	updateSelectedTrack(long playbackPositionUs, long bufferedDurationUs, long availableDurationUs) Updates the selected track.

Methods inherited from class com.google.android.exoplayer2.trackselection.BaseTrackSelection

blacklist, disable, enable, equals, evaluateQueueSize, getFormat, getIndexInTrackGroup, getSelectedFormat, getSelectedIndexInTrackGroup, getTrackGroup, hashCode, indexOf, indexOf, isBlacklisted, length, onPlaybackSpeed

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomTrackSelection

public RandomTrackSelection(TrackGroup group,
                            int... tracks)

Parameters:

group - The TrackGroup. Must not be null.

tracks - The indices of the selected tracks within the TrackGroup. Must not be null or empty. May be in any order.

RandomTrackSelection

public RandomTrackSelection(TrackGroup group,
                            int[] tracks,
                            long seed)

Parameters:

group - The TrackGroup. Must not be null.

tracks - The indices of the selected tracks within the TrackGroup. Must not be null or empty. May be in any order.

seed - A seed for the Random instance used to update the selected track.

RandomTrackSelection

public RandomTrackSelection(TrackGroup group,
                            int[] tracks,
                            java.util.Random random)

Parameters:

group - The TrackGroup. Must not be null.

tracks - The indices of the selected tracks within the TrackGroup. Must not be null or empty. May be in any order.

random - A source of random numbers.

Method Detail

updateSelectedTrack

public void updateSelectedTrack(long playbackPositionUs,
                                long bufferedDurationUs,
                                long availableDurationUs)

Description copied from interface: TrackSelection

Updates the selected track.

This method may only be called when the selection is enabled.

Parameters:

playbackPositionUs - The current playback position in microseconds. If playback of the period to which this track selection belongs has not yet started, the value will be the starting position in the period minus the duration of any media in previous periods still to be played.

bufferedDurationUs - The duration of media currently buffered from the current playback position, in microseconds. Note that the next load position can be calculated as (playbackPositionUs + bufferedDurationUs).

availableDurationUs - The duration of media available for buffering from the current playback position, in microseconds, or C.TIME_UNSET if media can be buffered to the end of the current period. Note that if not set to C.TIME_UNSET, the position up to which media is available for buffering can be calculated as (playbackPositionUs + availableDurationUs).

getSelectedIndex

public int getSelectedIndex()

Description copied from interface: TrackSelection

Returns the index of the selected track.

getSelectionReason

public int getSelectionReason()

Description copied from interface: TrackSelection

Returns the reason for the current track selection.

getSelectionData

@Nullable
public java.lang.Object getSelectionData()

Description copied from interface: TrackSelection

Returns optional data associated with the current track selection.