DefaultAnalyticsCollector

Artifact: androidx.media3:media3-exoplayer

Kotlin |Java

@UnstableApi
class DefaultAnalyticsCollector : AnalyticsCollector

Data collector that forwards analytics events to AnalyticsListeners.

Summary

Public constructors
`DefaultAnalyticsCollector(clock: Clock!)` Creates an analytics collector.

Public functions
`Unit`	`@CallSuper addListener(listener: AnalyticsListener!)` Adds a listener for analytics events.
`Unit`	`notifySeekStarted()` Notify analytics collector that a seek operation will start.
`Unit`	`onAudioAttributesChanged(audioAttributes: AudioAttributes!)` Called when the value of `getAudioAttributes` changes.
`Unit`	`onAudioCodecError(audioCodecError: Exception!)` Called when an audio decoder encounters an error.
`Unit`	`onAudioDecoderInitialized( decoderName: String!, initializedTimestampMs: Long, initializationDurationMs: Long )` Called when a audio decoder is created.
`Unit`	`onAudioDecoderReleased(decoderName: String!)` Called when a audio decoder is released.
`Unit`	`onAudioDisabled(counters: DecoderCounters!)` Called when the audio renderer is disabled.
`Unit`	`onAudioEnabled(counters: DecoderCounters!)` Called when the audio renderer is enabled.
`Unit`	`onAudioInputFormatChanged( format: Format!, decoderReuseEvaluation: DecoderReuseEvaluation? )` Called when the format of the media being consumed by the audio renderer changes.
`Unit`	`onAudioPositionAdvancing(playoutStartSystemTimeMs: Long)` Called when the audio position has increased for the first time since the last pause or position reset.
`Unit`	`onAudioSessionIdChanged(audioSessionId: Int)` Called when the audio session ID changes.
`Unit`	`onAudioSinkError(audioSinkError: Exception!)` Called when `AudioSink` has encountered an error.
`Unit`	`onAudioTrackInitialized(audioTrackConfig: AudioSink.AudioTrackConfig!)` Called when an `AudioTrack` has been initialized.
`Unit`	`onAudioTrackReleased(audioTrackConfig: AudioSink.AudioTrackConfig!)` Called when an `AudioTrack` has been released.
`Unit`	`onAudioUnderrun( bufferSize: Int, bufferSizeMs: Long, elapsedSinceLastFeedMs: Long )` Called when an audio underrun occurs.
`Unit`	`onAvailableCommandsChanged(availableCommands: Player.Commands!)` Called when the value returned from `isCommandAvailable` changes for at least one `Command`.
`Unit`	`onBandwidthSample( elapsedMs: Int, bytesTransferred: Long, bitrateEstimate: Long )` Called periodically to indicate that bytes have been transferred or the estimated bitrate has changed.
`Unit`	`onCues(cueGroup: CueGroup!)` Called when the value of `getCurrentCues` changes.
`Unit`	`onCues(cues: (Mutable)List<Cue!>!)` This function is deprecated. Use `onCues` instead.
`Unit`	`onDeviceInfoChanged(deviceInfo: DeviceInfo!)` Called when the device information changes
`Unit`	`onDeviceVolumeChanged(volume: Int, muted: Boolean)` Called when the value of `getDeviceVolume` or `isDeviceMuted` changes.
`Unit`	`onDownstreamFormatChanged( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId?, mediaLoadData: MediaLoadData! )` Called when a downstream format change occurs (i.e. when the format of the media being read from one or more `SampleStream`s provided by the source changes).
`Unit`	`onDrmKeysLoaded( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId? )` Called each time keys are loaded.
`Unit`	`onDrmKeysRemoved( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId? )` Called each time offline keys are removed.
`Unit`	`onDrmKeysRestored( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId? )` Called each time offline keys are restored.
`Unit`	`onDrmSessionAcquired( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId?, @DrmSession.State state: Int )` Called each time a drm session is acquired.
`Unit`	`onDrmSessionManagerError( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId?, error: Exception! )` Called when a drm error occurs.
`Unit`	`onDrmSessionReleased( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId? )` Called each time a drm session is released.
`Unit`	`onDroppedFrames(count: Int, elapsedMs: Long)` Called to report the number of frames dropped by the video renderer.
`Unit`	`onEvents(player: Player!, events: Player.Events!)` Called when one or more player states changed.
`Unit`	`onIsLoadingChanged(isLoading: Boolean)` Called when the player starts or stops loading the source.
`Unit`	`onIsPlayingChanged(isPlaying: Boolean)` Called when the value of `isPlaying` changes.
`Unit`	`onLoadCanceled( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId?, loadEventInfo: LoadEventInfo!, mediaLoadData: MediaLoadData! )` Called when a load is canceled.
`Unit`	`onLoadCompleted( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId?, loadEventInfo: LoadEventInfo!, mediaLoadData: MediaLoadData! )` Called when a load ends.
`Unit`	`onLoadError( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId?, loadEventInfo: LoadEventInfo!, mediaLoadData: MediaLoadData!, error: IOException!, wasCanceled: Boolean )` Called when a load error occurs.
`Unit`	`onLoadStarted( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId?, loadEventInfo: LoadEventInfo!, mediaLoadData: MediaLoadData! )` Called when a load begins.
`Unit`	`onLoadingChanged(isLoading: Boolean)` This function is deprecated. Use `onIsLoadingChanged` instead.
`Unit`	`onMaxSeekToPreviousPositionChanged(maxSeekToPreviousPositionMs: Long)` Called when the value of `getMaxSeekToPreviousPosition` changes.
`Unit`	`onMediaItemTransition( mediaItem: MediaItem?, @Player.MediaItemTransitionReason reason: Int )` Called when playback transitions to a media item or starts repeating a media item according to the current `repeat mode`.
`Unit`	`onMediaMetadataChanged(mediaMetadata: MediaMetadata!)` Called when the value of `getMediaMetadata` changes.
`Unit`	`onMetadata(metadata: Metadata!)` Called when there is metadata associated with the current playback time.
`Unit`	`onPlayWhenReadyChanged( playWhenReady: Boolean, @Player.PlayWhenReadyChangeReason reason: Int )` Called when the value returned from `getPlayWhenReady` changes.
`Unit`	`onPlaybackParametersChanged(playbackParameters: PlaybackParameters!)` Called when the value of `getPlaybackParameters` changes.
`Unit`	`onPlaybackStateChanged(@Player.State playbackState: Int)` Called when the value returned from `getPlaybackState` changes.
`Unit`	`onPlaybackSuppressionReasonChanged( @Player.PlaybackSuppressionReason playbackSuppressionReason: Int )` Called when the value returned from `getPlaybackSuppressionReason` changes.
`Unit`	`onPlayerError(error: PlaybackException!)` Called when an error occurs.
`Unit`	`onPlayerErrorChanged(error: PlaybackException?)` Called when the `PlaybackException` returned by `getPlayerError` changes.
`Unit`	`onPlayerStateChanged( playWhenReady: Boolean, @Player.State playbackState: Int )` This function is deprecated. Use `onPlaybackStateChanged` and `onPlayWhenReadyChanged` instead.
`Unit`	`onPlaylistMetadataChanged(playlistMetadata: MediaMetadata!)` Called when the value of `getPlaylistMetadata` changes.
`Unit`	`onPositionDiscontinuity(@Player.DiscontinuityReason reason: Int)` This function is deprecated. Use `onPositionDiscontinuity` instead.
`Unit`	`onPositionDiscontinuity( oldPosition: Player.PositionInfo!, newPosition: Player.PositionInfo!, @Player.DiscontinuityReason reason: Int )` Called when a position discontinuity occurs.
`Unit`	`onRenderedFirstFrame()` Called when a frame is rendered for the first time since setting the surface, or since the renderer was reset, or since the stream being rendered was changed.
`Unit`	`onRenderedFirstFrame(output: Any!, renderTimeMs: Long)` Called when a frame is rendered for the first time since setting the output, or since the renderer was reset, or since the stream being rendered was changed.
`Unit`	`onRepeatModeChanged(@Player.RepeatMode repeatMode: Int)` Called when the value of `getRepeatMode` changes.
`Unit`	`onSeekBackIncrementChanged(seekBackIncrementMs: Long)` Called when the value of `getSeekBackIncrement` changes.
`Unit`	`onSeekForwardIncrementChanged(seekForwardIncrementMs: Long)` Called when the value of `getSeekForwardIncrement` changes.
`Unit`	`onShuffleModeEnabledChanged(shuffleModeEnabled: Boolean)` Called when the value of `getShuffleModeEnabled` changes.
`Unit`	`onSkipSilenceEnabledChanged(skipSilenceEnabled: Boolean)` Called when skipping silences is enabled or disabled in the audio stream.
`Unit`	`onSurfaceSizeChanged(width: Int, height: Int)` Called each time there's a change in the size of the surface onto which the video is being rendered.
`Unit`	`onTimelineChanged( timeline: Timeline!, @Player.TimelineChangeReason reason: Int )` Called when the value of `getCurrentTimeline` changes.
`Unit`	`onTrackSelectionParametersChanged(parameters: TrackSelectionParameters!)` Called when the value returned from `getTrackSelectionParameters` changes.
`Unit`	`onTracksChanged(tracks: Tracks!)` Called when the value of `getCurrentTracks` changes.
`Unit`	`onUpstreamDiscarded( windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId?, mediaLoadData: MediaLoadData! )` Called when data is removed from the back of a media buffer, typically so that it can be re-buffered in a different format.
`Unit`	`onVideoCodecError(videoCodecError: Exception!)` Called when a video decoder encounters an error.
`Unit`	`onVideoDecoderInitialized( decoderName: String!, initializedTimestampMs: Long, initializationDurationMs: Long )` Called when a video decoder is created.
`Unit`	`onVideoDecoderReleased(decoderName: String!)` Called when a video decoder is released.
`Unit`	`onVideoDisabled(counters: DecoderCounters!)` Called when the video renderer is disabled.
`Unit`	`onVideoEnabled(counters: DecoderCounters!)` Called when the video renderer is enabled.
`Unit`	`onVideoFrameProcessingOffset( totalProcessingOffsetUs: Long, frameCount: Int )` Called to report the video processing offset of video frames processed by the video renderer.
`Unit`	`onVideoInputFormatChanged( format: Format!, decoderReuseEvaluation: DecoderReuseEvaluation? )` Called when the format of the media being consumed by the video renderer changes.
`Unit`	`onVideoSizeChanged(videoSize: VideoSize!)` Called each time when `getVideoSize` changes.
`Unit`	`onVolumeChanged(volume: Float)` Called when the value of `getVolume` changes.
`Unit`	`@CallSuper release()` Releases the collector.
`Unit`	`@CallSuper removeListener(listener: AnalyticsListener!)` Removes a previously added analytics event listener.
`Unit`	`@CallSuper setPlayer(player: Player!, looper: Looper!)` Sets the player for which data will be collected.
`Unit`	`setThrowsWhenUsingWrongThread(throwsWhenUsingWrongThread: Boolean)` This function is deprecated. Do not use this method and ensure all calls are made from the correct thread.
`Unit`	`updateMediaPeriodQueueInfo( queue: (Mutable)List<MediaSource.MediaPeriodId!>!, readingPeriod: MediaSource.MediaPeriodId? )` Updates the playback queue information used for event association.

Protected functions
`AnalyticsListener.EventTime!`	`generateCurrentPlayerMediaPeriodEventTime()` Generates an `EventTime` for the currently playing item in the player.
`AnalyticsListener.EventTime!`	`@RequiresNonNull(value = "player") generateEventTime( timeline: Timeline!, windowIndex: Int, mediaPeriodId: MediaSource.MediaPeriodId? )` Returns a new `EventTime` for the specified timeline, window and media period id.
`Unit`	`sendEvent( eventTime: AnalyticsListener.EventTime!, eventFlag: Int, eventInvocation: ListenerSet.Event<AnalyticsListener!>! )` Sends an event to registered listeners.

Inherited functions

From androidx.media3.exoplayer.drm.DrmSessionEventListener

Unit

onDrmSessionAcquired(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?
)

This function is deprecated.

Implement onDrmSessionAcquired instead.

Public constructors

DefaultAnalyticsCollector

DefaultAnalyticsCollector(clock: Clock!)

Creates an analytics collector.

Parameters
`clock: Clock!`	A `Clock` used to generate timestamps.

Public functions

addListener

@CallSuper
fun addListener(listener: AnalyticsListener!): Unit

Adds a listener for analytics events.

Parameters
`listener: AnalyticsListener!`	The listener to add.

notifySeekStarted

fun notifySeekStarted(): Unit

Notify analytics collector that a seek operation will start. Should be called before the player adjusts its state and position to the seek.

onAudioAttributesChanged

fun onAudioAttributesChanged(audioAttributes: AudioAttributes!): Unit

Called when the value of getAudioAttributes changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`audioAttributes: AudioAttributes!`	The audio attributes.

onAudioCodecError

fun onAudioCodecError(audioCodecError: Exception!): Unit

Called when an audio decoder encounters an error.

Parameters
`audioCodecError: Exception!`	The error. Typically a `CodecException` if the renderer uses `MediaCodec`, or a `DecoderException` if the renderer uses a software decoder.

onAudioDecoderInitialized

fun onAudioDecoderInitialized(
    decoderName: String!,
    initializedTimestampMs: Long,
    initializationDurationMs: Long
): Unit

Called when a audio decoder is created.

Parameters
`decoderName: String!`	The audio decoder that was created.
`initializedTimestampMs: Long`	`elapsedRealtime` when initialization finished.
`initializationDurationMs: Long`	The time taken to initialize the decoder in milliseconds.

onAudioDecoderReleased

fun onAudioDecoderReleased(decoderName: String!): Unit

Called when a audio decoder is released.

Parameters
`decoderName: String!`	The audio decoder that was released.

onAudioDisabled

fun onAudioDisabled(counters: DecoderCounters!): Unit

Called when the audio renderer is disabled.

Parameters
`counters: DecoderCounters!`	`DecoderCounters` that were updated by the audio renderer.

onAudioEnabled

fun onAudioEnabled(counters: DecoderCounters!): Unit

Called when the audio renderer is enabled.

Parameters
`counters: DecoderCounters!`	`DecoderCounters` that will be updated by the audio renderer for as long as it remains enabled.

onAudioInputFormatChanged

fun onAudioInputFormatChanged(
    format: Format!,
    decoderReuseEvaluation: DecoderReuseEvaluation?
): Unit

Called when the format of the media being consumed by the audio renderer changes.

Parameters
`format: Format!`	The new format.
`decoderReuseEvaluation: DecoderReuseEvaluation?`	The result of the evaluation to determine whether an existing decoder instance can be reused for the new format, or `null` if the renderer did not have a decoder.

onAudioPositionAdvancing

fun onAudioPositionAdvancing(playoutStartSystemTimeMs: Long): Unit

Called when the audio position has increased for the first time since the last pause or position reset.

Parameters
`playoutStartSystemTimeMs: Long`	The approximate derived `currentTimeMillis` at which playout started.

onAudioSessionIdChanged

fun onAudioSessionIdChanged(audioSessionId: Int): Unit

Called when the audio session ID changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`audioSessionId: Int`	The audio session ID.

onAudioSinkError

fun onAudioSinkError(audioSinkError: Exception!): Unit

Called when AudioSink has encountered an error.

If the sink writes to a platform AudioTrack, this will be called for all errors.

Parameters
`audioSinkError: Exception!`	The error that occurred. Typically an , a `AudioSink.WriteException`, or an .

onAudioTrackInitialized

fun onAudioTrackInitialized(audioTrackConfig: AudioSink.AudioTrackConfig!): Unit

Called when an AudioTrack has been initialized.

Parameters
`audioTrackConfig: AudioSink.AudioTrackConfig!`	The `AudioSink.AudioTrackConfig` of the initialized .

onAudioTrackReleased

fun onAudioTrackReleased(audioTrackConfig: AudioSink.AudioTrackConfig!): Unit

Called when an AudioTrack has been released.

Parameters
`audioTrackConfig: AudioSink.AudioTrackConfig!`	The `AudioSink.AudioTrackConfig` of the released .

onAudioUnderrun

fun onAudioUnderrun(
    bufferSize: Int,
    bufferSizeMs: Long,
    elapsedSinceLastFeedMs: Long
): Unit

Called when an audio underrun occurs.

Parameters
`bufferSize: Int`	The size of the audio output buffer, in bytes.
`bufferSizeMs: Long`	The size of the audio output buffer, in milliseconds, if it contains PCM encoded audio. `TIME_UNSET` if the output buffer contains non-PCM encoded audio.
`elapsedSinceLastFeedMs: Long`	The time since audio was last written to the output buffer.

onAvailableCommandsChanged

fun onAvailableCommandsChanged(availableCommands: Player.Commands!): Unit

Called when the value returned from isCommandAvailable changes for at least one Command.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`availableCommands: Player.Commands!`	The available `Commands`.

onBandwidthSample

fun onBandwidthSample(
    elapsedMs: Int,
    bytesTransferred: Long,
    bitrateEstimate: Long
): Unit

Called periodically to indicate that bytes have been transferred or the estimated bitrate has changed.

Note: The estimated bitrate is typically derived from more information than just bytesTransferred and elapsedMs.

Parameters
`elapsedMs: Int`	The time taken to transfer `bytesTransferred`, in milliseconds. This is at most the elapsed time since the last callback, but may be less if there were periods during which data was not being transferred.
`bytesTransferred: Long`	The number of bytes transferred since the last callback.
`bitrateEstimate: Long`	The estimated bitrate in bits/sec.

onCues

fun onCues(cueGroup: CueGroup!): Unit

Called when the value of getCurrentCues changes.

Both this method and onCues are called when there is a change in the cues. You should only implement one or the other.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

onCues

fun onCues(cues: (Mutable)List<Cue!>!): Unit

Called when the value of getCurrentCues changes.

Both this method and onCues are called when there is a change in the cues. You should only implement one or the other.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

onDeviceInfoChanged

fun onDeviceInfoChanged(deviceInfo: DeviceInfo!): Unit

Called when the device information changes

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`deviceInfo: DeviceInfo!`	The new `DeviceInfo`.

onDeviceVolumeChanged

fun onDeviceVolumeChanged(volume: Int, muted: Boolean): Unit

Called when the value of getDeviceVolume or isDeviceMuted changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`volume: Int`	The new device volume, with 0 being silence and 1 being unity gain.
`muted: Boolean`	Whether the device is muted.

onDownstreamFormatChanged

fun onDownstreamFormatChanged(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?,
    mediaLoadData: MediaLoadData!
): Unit

Called when a downstream format change occurs (i.e. when the format of the media being read from one or more SampleStreams provided by the source changes).

Parameters
`windowIndex: Int`	The window index in the timeline of the media source this load belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` the media belongs to.
`mediaLoadData: MediaLoadData!`	The `MediaLoadData` defining the newly selected downstream data.

onDrmKeysLoaded

fun onDrmKeysLoaded(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?
): Unit

Called each time keys are loaded.

Parameters
`windowIndex: Int`	The window index in the timeline this media period belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` associated with the drm session.

onDrmKeysRemoved

fun onDrmKeysRemoved(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?
): Unit

Called each time offline keys are removed.

Parameters
`windowIndex: Int`	The window index in the timeline this media period belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` associated with the drm session.

onDrmKeysRestored

fun onDrmKeysRestored(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?
): Unit

Called each time offline keys are restored.

Parameters
`windowIndex: Int`	The window index in the timeline this media period belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` associated with the drm session.

onDrmSessionAcquired

fun onDrmSessionAcquired(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?,
    @DrmSession.State state: Int
): Unit

Called each time a drm session is acquired.

Parameters
`windowIndex: Int`	The window index in the timeline this media period belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` associated with the drm session.
`@DrmSession.State state: Int`	The `DrmSession.State` of the session when the acquisition completed.

onDrmSessionManagerError

fun onDrmSessionManagerError(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?,
    error: Exception!
): Unit

Called when a drm error occurs.

This method being called does not indicate that playback has failed, or that it will fail. The player may be able to recover from the error and continue. Hence applications should not implement this method to display a user visible error or initiate an application level retry (onPlayerError is the appropriate place to implement such behavior). This method is called to provide the application with an opportunity to log the error if it wishes to do so.

Parameters
`windowIndex: Int`	The window index in the timeline this media period belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` associated with the drm session.
`error: Exception!`	The corresponding exception.

onDrmSessionReleased

fun onDrmSessionReleased(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?
): Unit

Called each time a drm session is released.

Parameters
`windowIndex: Int`	The window index in the timeline this media period belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` associated with the drm session.

onDroppedFrames

fun onDroppedFrames(count: Int, elapsedMs: Long): Unit

Called to report the number of frames dropped by the video renderer. Dropped frames are reported whenever the renderer is stopped having dropped frames, and optionally, whenever the count reaches a specified threshold whilst the renderer is started.

Parameters
`count: Int`	The number of dropped frames.
`elapsedMs: Long`	The duration in milliseconds over which the frames were dropped. This duration is timed from when the renderer was started or from when dropped frames were last reported (whichever was more recent), and not from when the first of the reported drops occurred.

onEvents

fun onEvents(player: Player!, events: Player.Events!): Unit

Called when one or more player states changed.

State changes and events that happen within one Looper message queue iteration are reported together and only after all individual callbacks were triggered.

Listeners should prefer this method over individual callbacks in the following cases:

They intend to trigger the same logic for multiple events (e.g. when updating a UI for both onPlaybackStateChanged and onPlayWhenReadyChanged).
They need access to the Player object to trigger further events (e.g. to call seekTo after a onMediaItemTransition).
They intend to use multiple state values together or in combination with Player getter methods. For example using getCurrentMediaItemIndex with the timeline provided in onTimelineChanged is only safe from within this method.
They are interested in events that logically happened together (e.g onPlaybackStateChanged to STATE_BUFFERING because of onMediaItemTransition).

Parameters
`player: Player!`	The `Player` whose state changed. Use the getters to obtain the latest states.
`events: Player.Events!`	The `Events` that happened in this iteration, indicating which player states changed.

onIsLoadingChanged

fun onIsLoadingChanged(isLoading: Boolean): Unit

Called when the player starts or stops loading the source.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`isLoading: Boolean`	Whether the source is currently being loaded.

onIsPlayingChanged

fun onIsPlayingChanged(isPlaying: Boolean): Unit

Called when the value of isPlaying changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`isPlaying: Boolean`	Whether the player is playing.

onLoadCanceled

fun onLoadCanceled(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?,
    loadEventInfo: LoadEventInfo!,
    mediaLoadData: MediaLoadData!
): Unit

Called when a load is canceled.

Parameters
`windowIndex: Int`	The window index in the timeline of the media source this load belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` this load belongs to. Null if the load does not belong to a specific media period.
`loadEventInfo: LoadEventInfo!`	The `LoadEventInfo` corresponding to the event. The values of `elapsedRealtimeMs` and `bytesLoaded` are relative to the corresponding `onLoadStarted` event.
`mediaLoadData: MediaLoadData!`	The `MediaLoadData` defining the data being loaded.

onLoadCompleted

fun onLoadCompleted(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?,
    loadEventInfo: LoadEventInfo!,
    mediaLoadData: MediaLoadData!
): Unit

Called when a load ends.

Parameters
`windowIndex: Int`	The window index in the timeline of the media source this load belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` this load belongs to. Null if the load does not belong to a specific media period.
`loadEventInfo: LoadEventInfo!`	The `LoadEventInfo` corresponding to the event. The values of `elapsedRealtimeMs` and `bytesLoaded` are relative to the corresponding `onLoadStarted` event.
`mediaLoadData: MediaLoadData!`	The `MediaLoadData` defining the data being loaded.

onLoadError

fun onLoadError(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?,
    loadEventInfo: LoadEventInfo!,
    mediaLoadData: MediaLoadData!,
    error: IOException!,
    wasCanceled: Boolean
): Unit

Called when a load error occurs.

The error may or may not have resulted in the load being canceled, as indicated by the wasCanceled parameter. If the load was canceled, onLoadCanceled will not be called in addition to this method.

This method being called does not indicate that playback has failed, or that it will fail. The player may be able to recover from the error. Hence applications should not implement this method to display a user visible error or initiate an application level retry. onPlayerError is the appropriate place to implement such behavior. This method is called to provide the application with an opportunity to log the error if it wishes to do so.

Parameters
`windowIndex: Int`	The window index in the timeline of the media source this load belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` this load belongs to. Null if the load does not belong to a specific media period.
`loadEventInfo: LoadEventInfo!`	The `LoadEventInfo` corresponding to the event. The values of `elapsedRealtimeMs` and `bytesLoaded` are relative to the corresponding `onLoadStarted` event.
`mediaLoadData: MediaLoadData!`	The `MediaLoadData` defining the data being loaded.
`error: IOException!`	The load error.
`wasCanceled: Boolean`	Whether the load was canceled as a result of the error.

onLoadStarted

fun onLoadStarted(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?,
    loadEventInfo: LoadEventInfo!,
    mediaLoadData: MediaLoadData!
): Unit

Called when a load begins.

Parameters
`windowIndex: Int`	The window index in the timeline of the media source this load belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` this load belongs to. Null if the load does not belong to a specific media period.
`loadEventInfo: LoadEventInfo!`	The `LoadEventInfo` corresponding to the event. The value of `uri` won't reflect potential redirection yet and `responseHeaders` will be empty.
`mediaLoadData: MediaLoadData!`	The `MediaLoadData` defining the data being loaded.

onLoadingChanged

fun onLoadingChanged(isLoading: Boolean): Unit

onMaxSeekToPreviousPositionChanged

fun onMaxSeekToPreviousPositionChanged(maxSeekToPreviousPositionMs: Long): Unit

Called when the value of getMaxSeekToPreviousPosition changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`maxSeekToPreviousPositionMs: Long`	The maximum position for which `seekToPrevious` seeks to the previous position, in milliseconds.

onMediaItemTransition

fun onMediaItemTransition(
    mediaItem: MediaItem?,
    @Player.MediaItemTransitionReason reason: Int
): Unit

Called when playback transitions to a media item or starts repeating a media item according to the current repeat mode.

Note that this callback is also called when the value of getCurrentTimeline becomes non-empty or empty.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`mediaItem: MediaItem?`	The `MediaItem`. May be null if the playlist becomes empty.
`@Player.MediaItemTransitionReason reason: Int`	The reason for the transition.

onMediaMetadataChanged

fun onMediaMetadataChanged(mediaMetadata: MediaMetadata!): Unit

Called when the value of getMediaMetadata changes.

This method may be called multiple times in quick succession.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`mediaMetadata: MediaMetadata!`	The combined `MediaMetadata`.

onMetadata

fun onMetadata(metadata: Metadata!): Unit

Called when there is metadata associated with the current playback time.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`metadata: Metadata!`	The metadata.

onPlayWhenReadyChanged

fun onPlayWhenReadyChanged(
    playWhenReady: Boolean,
    @Player.PlayWhenReadyChangeReason reason: Int
): Unit

Called when the value returned from getPlayWhenReady changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`playWhenReady: Boolean`	Whether playback will proceed when ready.
`@Player.PlayWhenReadyChangeReason reason: Int`	The `PlayWhenReadyChangeReason` for the change.

onPlaybackParametersChanged

fun onPlaybackParametersChanged(playbackParameters: PlaybackParameters!): Unit

Called when the value of getPlaybackParameters changes. The playback parameters may change due to a call to setPlaybackParameters, or the player itself may change them (for example, if audio playback switches to passthrough or offload mode, where speed adjustment is no longer possible).

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`playbackParameters: PlaybackParameters!`	The playback parameters.

onPlaybackStateChanged

fun onPlaybackStateChanged(@Player.State playbackState: Int): Unit

Called when the value returned from getPlaybackState changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`@Player.State playbackState: Int`	The new playback `State`.

onPlaybackSuppressionReasonChanged

fun onPlaybackSuppressionReasonChanged(
    @Player.PlaybackSuppressionReason playbackSuppressionReason: Int
): Unit

Called when the value returned from getPlaybackSuppressionReason changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`@Player.PlaybackSuppressionReason playbackSuppressionReason: Int`	The current `PlaybackSuppressionReason`.

onPlayerError

fun onPlayerError(error: PlaybackException!): Unit

Called when an error occurs. The playback state will transition to STATE_IDLE immediately after this method is called. The player instance can still be used, and release must still be called on the player should it no longer be required.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Implementations of Player may pass an instance of a subclass of PlaybackException to this method in order to include more information about the error.

Parameters
`error: PlaybackException!`	The error.

onPlayerErrorChanged

fun onPlayerErrorChanged(error: PlaybackException?): Unit

Called when the PlaybackException returned by getPlayerError changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Implementations of Player may pass an instance of a subclass of PlaybackException to this method in order to include more information about the error.

Parameters
`error: PlaybackException?`	The new error, or null if the error is being cleared.

onPlayerStateChanged

fun onPlayerStateChanged(
    playWhenReady: Boolean,
    @Player.State playbackState: Int
): Unit

onPlaylistMetadataChanged

fun onPlaylistMetadataChanged(playlistMetadata: MediaMetadata!): Unit

Called when the value of getPlaylistMetadata changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

onPositionDiscontinuity

fun onPositionDiscontinuity(@Player.DiscontinuityReason reason: Int): Unit

onPositionDiscontinuity

fun onPositionDiscontinuity(
    oldPosition: Player.PositionInfo!,
    newPosition: Player.PositionInfo!,
    @Player.DiscontinuityReason reason: Int
): Unit

Called when a position discontinuity occurs.

A position discontinuity occurs when the playing period changes, the playback position jumps within the period currently being played, or when the playing period has been skipped or removed.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`oldPosition: Player.PositionInfo!`	The position before the discontinuity.
`newPosition: Player.PositionInfo!`	The position after the discontinuity.
`@Player.DiscontinuityReason reason: Int`	The `DiscontinuityReason` responsible for the discontinuity.

onRenderedFirstFrame

fun onRenderedFirstFrame(): Unit

Called when a frame is rendered for the first time since setting the surface, or since the renderer was reset, or since the stream being rendered was changed.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

onRenderedFirstFrame

fun onRenderedFirstFrame(output: Any!, renderTimeMs: Long): Unit

Called when a frame is rendered for the first time since setting the output, or since the renderer was reset, or since the stream being rendered was changed.

Parameters
`output: Any!`	The output of the video renderer. Normally a `Surface`, however some video renderers may have other output types (e.g., a `VideoDecoderOutputBufferRenderer`).
`renderTimeMs: Long`	The `elapsedRealtime` when the frame was rendered.

onRepeatModeChanged

fun onRepeatModeChanged(@Player.RepeatMode repeatMode: Int): Unit

Called when the value of getRepeatMode changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`@Player.RepeatMode repeatMode: Int`	The `RepeatMode` used for playback.

onSeekBackIncrementChanged

fun onSeekBackIncrementChanged(seekBackIncrementMs: Long): Unit

Called when the value of getSeekBackIncrement changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`seekBackIncrementMs: Long`	The `seekBack` increment, in milliseconds.

onSeekForwardIncrementChanged

fun onSeekForwardIncrementChanged(seekForwardIncrementMs: Long): Unit

Called when the value of getSeekForwardIncrement changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`seekForwardIncrementMs: Long`	The `seekForward` increment, in milliseconds.

onShuffleModeEnabledChanged

fun onShuffleModeEnabledChanged(shuffleModeEnabled: Boolean): Unit

Called when the value of getShuffleModeEnabled changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`shuffleModeEnabled: Boolean`	Whether shuffling of `media items` is enabled.

onSkipSilenceEnabledChanged

fun onSkipSilenceEnabledChanged(skipSilenceEnabled: Boolean): Unit

Called when skipping silences is enabled or disabled in the audio stream.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`skipSilenceEnabled: Boolean`	Whether skipping silences in the audio stream is enabled.

onSurfaceSizeChanged

fun onSurfaceSizeChanged(width: Int, height: Int): Unit

Called each time there's a change in the size of the surface onto which the video is being rendered.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`width: Int`	The surface width in pixels. May be `LENGTH_UNSET` if unknown, or 0 if the video is not rendered onto a surface.
`height: Int`	The surface height in pixels. May be `LENGTH_UNSET` if unknown, or 0 if the video is not rendered onto a surface.

onTimelineChanged

fun onTimelineChanged(
    timeline: Timeline!,
    @Player.TimelineChangeReason reason: Int
): Unit

Called when the value of getCurrentTimeline changes.

Note that the current MediaItem or playback position may change as a result of a timeline change. If playback can't continue smoothly because of this timeline change, a separate onPositionDiscontinuity callback will be triggered.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`timeline: Timeline!`	The latest timeline. Never null, but may be empty.
`@Player.TimelineChangeReason reason: Int`	The `TimelineChangeReason` responsible for this timeline change.

onTrackSelectionParametersChanged

fun onTrackSelectionParametersChanged(parameters: TrackSelectionParameters!): Unit

Called when the value returned from getTrackSelectionParameters changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`parameters: TrackSelectionParameters!`	The new `TrackSelectionParameters`.

onTracksChanged

fun onTracksChanged(tracks: Tracks!): Unit

Called when the value of getCurrentTracks changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`tracks: Tracks!`	The available tracks information. Never null, but may be of length zero.

onUpstreamDiscarded

fun onUpstreamDiscarded(
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?,
    mediaLoadData: MediaLoadData!
): Unit

Called when data is removed from the back of a media buffer, typically so that it can be re-buffered in a different format.

Parameters
`windowIndex: Int`	The window index in the timeline of the media source this load belongs to.
`mediaPeriodId: MediaSource.MediaPeriodId?`	The `MediaPeriodId` the media belongs to.
`mediaLoadData: MediaLoadData!`	The `MediaLoadData` defining the media being discarded.

onVideoCodecError

fun onVideoCodecError(videoCodecError: Exception!): Unit

Called when a video decoder encounters an error.

Parameters
`videoCodecError: Exception!`	The error. Typically a `CodecException` if the renderer uses `MediaCodec`, or a `DecoderException` if the renderer uses a software decoder.

onVideoDecoderInitialized

fun onVideoDecoderInitialized(
    decoderName: String!,
    initializedTimestampMs: Long,
    initializationDurationMs: Long
): Unit

Called when a video decoder is created.

Parameters
`decoderName: String!`	The decoder that was created.
`initializedTimestampMs: Long`	`elapsedRealtime` when initialization finished.
`initializationDurationMs: Long`	The time taken to initialize the decoder in milliseconds.

onVideoDecoderReleased

fun onVideoDecoderReleased(decoderName: String!): Unit

Called when a video decoder is released.

Parameters
`decoderName: String!`	The video decoder that was released.

onVideoDisabled

fun onVideoDisabled(counters: DecoderCounters!): Unit

Called when the video renderer is disabled.

Parameters
`counters: DecoderCounters!`	`DecoderCounters` that were updated by the video renderer.

onVideoEnabled

fun onVideoEnabled(counters: DecoderCounters!): Unit

Called when the video renderer is enabled.

Parameters
`counters: DecoderCounters!`	`DecoderCounters` that will be updated by the video renderer for as long as it remains enabled.

onVideoFrameProcessingOffset

fun onVideoFrameProcessingOffset(
    totalProcessingOffsetUs: Long,
    frameCount: Int
): Unit

Called to report the video processing offset of video frames processed by the video renderer.

Video processing offset represents how early a video frame is processed compared to the player's current position. For each video frame, the offset is calculated as Pvf - Ppl where Pvf is the presentation timestamp of the video frame and Ppl is the current position of the player. Positive values indicate the frame was processed early enough whereas negative values indicate that the player's position had progressed beyond the frame's timestamp when the frame was processed (and the frame was probably dropped).

The renderer reports the sum of video processing offset samples (one sample per processed video frame: dropped, skipped or rendered) and the total number of samples.

Parameters
`totalProcessingOffsetUs: Long`	The sum of all video frame processing offset samples for the video frames processed by the renderer in microseconds.
`frameCount: Int`	The number of samples included in the `totalProcessingOffsetUs`.

onVideoInputFormatChanged

fun onVideoInputFormatChanged(
    format: Format!,
    decoderReuseEvaluation: DecoderReuseEvaluation?
): Unit

Called when the format of the media being consumed by the video renderer changes.

Parameters
`format: Format!`	The new format.
`decoderReuseEvaluation: DecoderReuseEvaluation?`	The result of the evaluation to determine whether an existing decoder instance can be reused for the new format, or `null` if the renderer did not have a decoder.

onVideoSizeChanged

fun onVideoSizeChanged(videoSize: VideoSize!): Unit

Called each time when getVideoSize changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`videoSize: VideoSize!`	The new size of the video.

onVolumeChanged

fun onVolumeChanged(volume: Float): Unit

Called when the value of getVolume changes.

onEvents will also be called to report this event along with other events that happen in the same Looper message queue iteration.

Parameters
`volume: Float`	The new volume, with 0 being silence and 1 being unity gain.

release

@CallSuper
fun release(): Unit

Releases the collector. Must be called after the player for which data is collected has been released.

removeListener

@CallSuper
fun removeListener(listener: AnalyticsListener!): Unit

Removes a previously added analytics event listener.

Parameters
`listener: AnalyticsListener!`	The listener to remove.

setPlayer

@CallSuper
fun setPlayer(player: Player!, looper: Looper!): Unit

Sets the player for which data will be collected. Must only be called if no player has been set yet or the current player is idle.

Parameters
`player: Player!`	The `Player` for which data will be collected.
`looper: Looper!`	The `Looper` used for listener callbacks.

setThrowsWhenUsingWrongThread

fun setThrowsWhenUsingWrongThread(throwsWhenUsingWrongThread: Boolean): Unit

Sets whether methods throw when using the wrong thread.

Do not use this method unless to support legacy use cases.

Parameters
`throwsWhenUsingWrongThread: Boolean`	Whether to throw when using the wrong thread.

updateMediaPeriodQueueInfo

fun updateMediaPeriodQueueInfo(
    queue: (Mutable)List<MediaSource.MediaPeriodId!>!,
    readingPeriod: MediaSource.MediaPeriodId?
): Unit

Updates the playback queue information used for event association.

Should only be called by the player controlling the queue and not from app code.

Parameters
`queue: (Mutable)List<MediaSource.MediaPeriodId!>!`	The playback queue of media periods identified by their `MediaPeriodId`.
`readingPeriod: MediaSource.MediaPeriodId?`	The media period in the queue that is currently being read by renderers, or null if the queue is empty.

Protected functions

generateCurrentPlayerMediaPeriodEventTime

protected fun generateCurrentPlayerMediaPeriodEventTime(): AnalyticsListener.EventTime!

Generates an EventTime for the currently playing item in the player.

generateEventTime

@RequiresNonNull(value = "player")
protected fun generateEventTime(
    timeline: Timeline!,
    windowIndex: Int,
    mediaPeriodId: MediaSource.MediaPeriodId?
): AnalyticsListener.EventTime!

Returns a new EventTime for the specified timeline, window and media period id.

sendEvent

protected fun sendEvent(
    eventTime: AnalyticsListener.EventTime!,
    eventFlag: Int,
    eventInvocation: ListenerSet.Event<AnalyticsListener!>!
): Unit

Sends an event to registered listeners.

Parameters
`eventTime: AnalyticsListener.EventTime!`	The `EventTime` to report.
`eventFlag: Int`	An integer flag indicating the type of the event, or `INDEX_UNSET` to report this event without flag.
`eventInvocation: ListenerSet.Event<AnalyticsListener!>!`	The event.