com.google.android.exoplayer2.source.dash.PlayerEmsgHandler.PlayerTrackEmsgHandler Java Examples

@Override
public DashChunkSource createDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int trackType,
    long elapsedRealtimeOffsetMs,
    boolean enableEventMessageTrack,
    List<Format> closedCaptionFormats,
    @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
    @Nullable TransferListener transferListener) {
  DataSource dataSource = dataSourceFactory.createDataSource();
  if (transferListener != null) {
    dataSource.addTransferListener(transferListener);
  }
  return new DefaultDashChunkSource(
      manifestLoaderErrorThrower,
      manifest,
      periodIndex,
      adaptationSetIndices,
      trackSelection,
      trackType,
      dataSource,
      elapsedRealtimeOffsetMs,
      maxSegmentsPerLoad,
      enableEventMessageTrack,
      closedCaptionFormats,
      playerEmsgHandler);
}
 

@Override
public synchronized void onSampleStreamReleased(ChunkSampleStream<DashChunkSource> stream) {
  PlayerTrackEmsgHandler trackEmsgHandler = trackEmsgHandlerBySampleStream.remove(stream);
  if (trackEmsgHandler != null) {
    trackEmsgHandler.release();
  }
}
 

@Override
public synchronized void onSampleStreamReleased(ChunkSampleStream<DashChunkSource> stream) {
  PlayerTrackEmsgHandler trackEmsgHandler = trackEmsgHandlerBySampleStream.remove(stream);
  if (trackEmsgHandler != null) {
    trackEmsgHandler.release();
  }
}
 

@Override
public DashChunkSource createDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int trackType,
    long elapsedRealtimeOffsetMs,
    boolean enableEventMessageTrack,
    boolean enableCea608Track,
    @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
    @Nullable TransferListener transferListener) {
  DataSource dataSource = dataSourceFactory.createDataSource();
  if (transferListener != null) {
    dataSource.addTransferListener(transferListener);
  }
  return new DefaultDashChunkSource(
      manifestLoaderErrorThrower,
      manifest,
      periodIndex,
      adaptationSetIndices,
      trackSelection,
      trackType,
      dataSource,
      elapsedRealtimeOffsetMs,
      maxSegmentsPerLoad,
      enableEventMessageTrack,
      enableCea608Track,
      playerEmsgHandler);
}
 

@Override
public DashChunkSource createDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int trackType,
    long elapsedRealtimeOffsetMs,
    boolean enableEventMessageTrack,
    List<Format> closedCaptionFormats,
    @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
    @Nullable TransferListener transferListener) {
  DataSource dataSource = dataSourceFactory.createDataSource();
  if (transferListener != null) {
    dataSource.addTransferListener(transferListener);
  }
  return new DefaultDashChunkSource(
      manifestLoaderErrorThrower,
      manifest,
      periodIndex,
      adaptationSetIndices,
      trackSelection,
      trackType,
      dataSource,
      elapsedRealtimeOffsetMs,
      maxSegmentsPerLoad,
      enableEventMessageTrack,
      closedCaptionFormats,
      playerEmsgHandler);
}
 

@Override
public synchronized void onSampleStreamReleased(ChunkSampleStream<DashChunkSource> stream) {
  PlayerTrackEmsgHandler trackEmsgHandler = trackEmsgHandlerBySampleStream.remove(stream);
  if (trackEmsgHandler != null) {
    trackEmsgHandler.release();
  }
}
 

@Override
public DashChunkSource createDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int trackType,
    long elapsedRealtimeOffsetMs,
    boolean enableEventMessageTrack,
    boolean enableCea608Track,
    @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
    @Nullable TransferListener transferListener) {
  DataSource dataSource = dataSourceFactory.createDataSource();
  if (transferListener != null) {
    dataSource.addTransferListener(transferListener);
  }
  return new DefaultDashChunkSource(
      manifestLoaderErrorThrower,
      manifest,
      periodIndex,
      adaptationSetIndices,
      trackSelection,
      trackType,
      dataSource,
      elapsedRealtimeOffsetMs,
      maxSegmentsPerLoad,
      enableEventMessageTrack,
      enableCea608Track,
      playerEmsgHandler);
}
 

@Override
public synchronized void onSampleStreamReleased(ChunkSampleStream<DashChunkSource> stream) {
  PlayerTrackEmsgHandler trackEmsgHandler = trackEmsgHandlerBySampleStream.remove(stream);
  if (trackEmsgHandler != null) {
    trackEmsgHandler.release();
  }
}
 

@Override
public synchronized void onSampleStreamReleased(ChunkSampleStream<DashChunkSource> stream) {
  PlayerTrackEmsgHandler trackEmsgHandler = trackEmsgHandlerBySampleStream.remove(stream);
  if (trackEmsgHandler != null) {
    trackEmsgHandler.release();
  }
}
 

@Override
public DashChunkSource createDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int trackType,
    long elapsedRealtimeOffsetMs,
    boolean enableEventMessageTrack,
    List<Format> closedCaptionFormats,
    @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
    @Nullable TransferListener transferListener) {
  DataSource dataSource = dataSourceFactory.createDataSource();
  if (transferListener != null) {
    dataSource.addTransferListener(transferListener);
  }
  return new DefaultDashChunkSource(
      manifestLoaderErrorThrower,
      manifest,
      periodIndex,
      adaptationSetIndices,
      trackSelection,
      trackType,
      dataSource,
      elapsedRealtimeOffsetMs,
      maxSegmentsPerLoad,
      enableEventMessageTrack,
      closedCaptionFormats,
      playerEmsgHandler);
}
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the period in the manifest.
 * @param adaptationSetIndices The indices of the adaptation sets in the period.
 * @param trackSelection The track selection.
 * @param trackType The type of the tracks in the selection.
 * @param dataSource A {@link DataSource} suitable for loading the media data.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds, specified
 *     as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param maxSegmentsPerLoad The maximum number of segments to combine into a single request. Note
 *     that segments will only be combined if their {@link Uri}s are the same and if their data
 *     ranges are adjacent.
 * @param enableEventMessageTrack Whether to output an event message track.
 * @param closedCaptionFormats The {@link Format Formats} of closed caption tracks to be output.
 * @param playerTrackEmsgHandler The {@link PlayerTrackEmsgHandler} instance to handle emsg
 *     messages targeting the player. Maybe null if this is not necessary.
 */
public DefaultDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int trackType,
    DataSource dataSource,
    long elapsedRealtimeOffsetMs,
    int maxSegmentsPerLoad,
    boolean enableEventMessageTrack,
    List<Format> closedCaptionFormats,
    @Nullable PlayerTrackEmsgHandler playerTrackEmsgHandler) {
  this.manifestLoaderErrorThrower = manifestLoaderErrorThrower;
  this.manifest = manifest;
  this.adaptationSetIndices = adaptationSetIndices;
  this.trackSelection = trackSelection;
  this.trackType = trackType;
  this.dataSource = dataSource;
  this.periodIndex = periodIndex;
  this.elapsedRealtimeOffsetMs = elapsedRealtimeOffsetMs;
  this.maxSegmentsPerLoad = maxSegmentsPerLoad;
  this.playerTrackEmsgHandler = playerTrackEmsgHandler;

  long periodDurationUs = manifest.getPeriodDurationUs(periodIndex);
  liveEdgeTimeUs = C.TIME_UNSET;

  List<Representation> representations = getRepresentations();
  representationHolders = new RepresentationHolder[trackSelection.length()];
  for (int i = 0; i < representationHolders.length; i++) {
    Representation representation = representations.get(trackSelection.getIndexInTrackGroup(i));
    representationHolders[i] =
        new RepresentationHolder(
            periodDurationUs,
            trackType,
            representation,
            enableEventMessageTrack,
            closedCaptionFormats,
            playerTrackEmsgHandler);
  }
}
 

private ChunkSampleStream<DashChunkSource> buildSampleStream(TrackGroupInfo trackGroupInfo,
    TrackSelection selection, long positionUs) {
  int embeddedTrackCount = 0;
  boolean enableEventMessageTrack =
      trackGroupInfo.embeddedEventMessageTrackGroupIndex != C.INDEX_UNSET;
  TrackGroup embeddedEventMessageTrackGroup = null;
  if (enableEventMessageTrack) {
    embeddedEventMessageTrackGroup =
        trackGroups.get(trackGroupInfo.embeddedEventMessageTrackGroupIndex);
    embeddedTrackCount++;
  }
  boolean enableCea608Tracks = trackGroupInfo.embeddedCea608TrackGroupIndex != C.INDEX_UNSET;
  TrackGroup embeddedCea608TrackGroup = null;
  if (enableCea608Tracks) {
    embeddedCea608TrackGroup = trackGroups.get(trackGroupInfo.embeddedCea608TrackGroupIndex);
    embeddedTrackCount += embeddedCea608TrackGroup.length;
  }

  Format[] embeddedTrackFormats = new Format[embeddedTrackCount];
  int[] embeddedTrackTypes = new int[embeddedTrackCount];
  embeddedTrackCount = 0;
  if (enableEventMessageTrack) {
    embeddedTrackFormats[embeddedTrackCount] = embeddedEventMessageTrackGroup.getFormat(0);
    embeddedTrackTypes[embeddedTrackCount] = C.TRACK_TYPE_METADATA;
    embeddedTrackCount++;
  }
  List<Format> embeddedCea608TrackFormats = new ArrayList<>();
  if (enableCea608Tracks) {
    for (int i = 0; i < embeddedCea608TrackGroup.length; i++) {
      embeddedTrackFormats[embeddedTrackCount] = embeddedCea608TrackGroup.getFormat(i);
      embeddedTrackTypes[embeddedTrackCount] = C.TRACK_TYPE_TEXT;
      embeddedCea608TrackFormats.add(embeddedTrackFormats[embeddedTrackCount]);
      embeddedTrackCount++;
    }
  }

  PlayerTrackEmsgHandler trackPlayerEmsgHandler =
      manifest.dynamic && enableEventMessageTrack
          ? playerEmsgHandler.newPlayerTrackEmsgHandler()
          : null;
  DashChunkSource chunkSource =
      chunkSourceFactory.createDashChunkSource(
          manifestLoaderErrorThrower,
          manifest,
          periodIndex,
          trackGroupInfo.adaptationSetIndices,
          selection,
          trackGroupInfo.trackType,
          elapsedRealtimeOffsetMs,
          enableEventMessageTrack,
          embeddedCea608TrackFormats,
          trackPlayerEmsgHandler,
          transferListener);
  ChunkSampleStream<DashChunkSource> stream =
      new ChunkSampleStream<>(
          trackGroupInfo.trackType,
          embeddedTrackTypes,
          embeddedTrackFormats,
          chunkSource,
          this,
          allocator,
          positionUs,
          loadErrorHandlingPolicy,
          eventDispatcher);
  synchronized (this) {
    // The map is also accessed on the loading thread so synchronize access.
    trackEmsgHandlerBySampleStream.put(stream, trackPlayerEmsgHandler);
  }
  return stream;
}
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the period in the manifest.
 * @param adaptationSetIndices The indices of the adaptation sets in the period.
 * @param trackSelection The track selection.
 * @param trackType The type of the tracks in the selection.
 * @param dataSource A {@link DataSource} suitable for loading the media data.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds, specified
 *     as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param maxSegmentsPerLoad The maximum number of segments to combine into a single request. Note
 *     that segments will only be combined if their {@link Uri}s are the same and if their data
 *     ranges are adjacent.
 * @param enableEventMessageTrack Whether to output an event message track.
 * @param closedCaptionFormats The {@link Format Formats} of closed caption tracks to be output.
 * @param playerTrackEmsgHandler The {@link PlayerTrackEmsgHandler} instance to handle emsg
 *     messages targeting the player. Maybe null if this is not necessary.
 */
public DefaultDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int trackType,
    DataSource dataSource,
    long elapsedRealtimeOffsetMs,
    int maxSegmentsPerLoad,
    boolean enableEventMessageTrack,
    List<Format> closedCaptionFormats,
    @Nullable PlayerTrackEmsgHandler playerTrackEmsgHandler) {
  this.manifestLoaderErrorThrower = manifestLoaderErrorThrower;
  this.manifest = manifest;
  this.adaptationSetIndices = adaptationSetIndices;
  this.trackSelection = trackSelection;
  this.trackType = trackType;
  this.dataSource = dataSource;
  this.periodIndex = periodIndex;
  this.elapsedRealtimeOffsetMs = elapsedRealtimeOffsetMs;
  this.maxSegmentsPerLoad = maxSegmentsPerLoad;
  this.playerTrackEmsgHandler = playerTrackEmsgHandler;

  long periodDurationUs = manifest.getPeriodDurationUs(periodIndex);
  liveEdgeTimeUs = C.TIME_UNSET;

  List<Representation> representations = getRepresentations();
  representationHolders = new RepresentationHolder[trackSelection.length()];
  for (int i = 0; i < representationHolders.length; i++) {
    Representation representation = representations.get(trackSelection.getIndexInTrackGroup(i));
    representationHolders[i] =
        new RepresentationHolder(
            periodDurationUs,
            trackType,
            representation,
            enableEventMessageTrack,
            closedCaptionFormats,
            playerTrackEmsgHandler);
  }
}
 

private ChunkSampleStream<DashChunkSource> buildSampleStream(TrackGroupInfo trackGroupInfo,
    TrackSelection selection, long positionUs) {
  int embeddedTrackCount = 0;
  boolean enableEventMessageTrack =
      trackGroupInfo.embeddedEventMessageTrackGroupIndex != C.INDEX_UNSET;
  TrackGroup embeddedEventMessageTrackGroup = null;
  if (enableEventMessageTrack) {
    embeddedEventMessageTrackGroup =
        trackGroups.get(trackGroupInfo.embeddedEventMessageTrackGroupIndex);
    embeddedTrackCount++;
  }
  boolean enableCea608Tracks = trackGroupInfo.embeddedCea608TrackGroupIndex != C.INDEX_UNSET;
  TrackGroup embeddedCea608TrackGroup = null;
  if (enableCea608Tracks) {
    embeddedCea608TrackGroup = trackGroups.get(trackGroupInfo.embeddedCea608TrackGroupIndex);
    embeddedTrackCount += embeddedCea608TrackGroup.length;
  }

  Format[] embeddedTrackFormats = new Format[embeddedTrackCount];
  int[] embeddedTrackTypes = new int[embeddedTrackCount];
  embeddedTrackCount = 0;
  if (enableEventMessageTrack) {
    embeddedTrackFormats[embeddedTrackCount] = embeddedEventMessageTrackGroup.getFormat(0);
    embeddedTrackTypes[embeddedTrackCount] = C.TRACK_TYPE_METADATA;
    embeddedTrackCount++;
  }
  List<Format> embeddedCea608TrackFormats = new ArrayList<>();
  if (enableCea608Tracks) {
    for (int i = 0; i < embeddedCea608TrackGroup.length; i++) {
      embeddedTrackFormats[embeddedTrackCount] = embeddedCea608TrackGroup.getFormat(i);
      embeddedTrackTypes[embeddedTrackCount] = C.TRACK_TYPE_TEXT;
      embeddedCea608TrackFormats.add(embeddedTrackFormats[embeddedTrackCount]);
      embeddedTrackCount++;
    }
  }

  PlayerTrackEmsgHandler trackPlayerEmsgHandler =
      manifest.dynamic && enableEventMessageTrack
          ? playerEmsgHandler.newPlayerTrackEmsgHandler()
          : null;
  DashChunkSource chunkSource =
      chunkSourceFactory.createDashChunkSource(
          manifestLoaderErrorThrower,
          manifest,
          periodIndex,
          trackGroupInfo.adaptationSetIndices,
          selection,
          trackGroupInfo.trackType,
          elapsedRealtimeOffsetMs,
          enableEventMessageTrack,
          embeddedCea608TrackFormats,
          trackPlayerEmsgHandler,
          transferListener);
  ChunkSampleStream<DashChunkSource> stream =
      new ChunkSampleStream<>(
          trackGroupInfo.trackType,
          embeddedTrackTypes,
          embeddedTrackFormats,
          chunkSource,
          this,
          allocator,
          positionUs,
          loadErrorHandlingPolicy,
          eventDispatcher);
  synchronized (this) {
    // The map is also accessed on the loading thread so synchronize access.
    trackEmsgHandlerBySampleStream.put(stream, trackPlayerEmsgHandler);
  }
  return stream;
}
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the period in the manifest.
 * @param adaptationSetIndices The indices of the adaptation sets in the period.
 * @param trackSelection The track selection.
 * @param trackType The type of the tracks in the selection.
 * @param dataSource A {@link DataSource} suitable for loading the media data.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds, specified
 *     as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param maxSegmentsPerLoad The maximum number of segments to combine into a single request. Note
 *     that segments will only be combined if their {@link Uri}s are the same and if their data
 *     ranges are adjacent.
 * @param enableEventMessageTrack Whether to output an event message track.
 * @param closedCaptionFormats The {@link Format Formats} of closed caption tracks to be output.
 * @param playerTrackEmsgHandler The {@link PlayerTrackEmsgHandler} instance to handle emsg
 *     messages targeting the player. Maybe null if this is not necessary.
 */
public DefaultDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int trackType,
    DataSource dataSource,
    long elapsedRealtimeOffsetMs,
    int maxSegmentsPerLoad,
    boolean enableEventMessageTrack,
    List<Format> closedCaptionFormats,
    @Nullable PlayerTrackEmsgHandler playerTrackEmsgHandler) {
  this.manifestLoaderErrorThrower = manifestLoaderErrorThrower;
  this.manifest = manifest;
  this.adaptationSetIndices = adaptationSetIndices;
  this.trackSelection = trackSelection;
  this.trackType = trackType;
  this.dataSource = dataSource;
  this.periodIndex = periodIndex;
  this.elapsedRealtimeOffsetMs = elapsedRealtimeOffsetMs;
  this.maxSegmentsPerLoad = maxSegmentsPerLoad;
  this.playerTrackEmsgHandler = playerTrackEmsgHandler;

  long periodDurationUs = manifest.getPeriodDurationUs(periodIndex);
  liveEdgeTimeUs = C.TIME_UNSET;

  List<Representation> representations = getRepresentations();
  representationHolders = new RepresentationHolder[trackSelection.length()];
  for (int i = 0; i < representationHolders.length; i++) {
    Representation representation = representations.get(trackSelection.getIndexInTrackGroup(i));
    representationHolders[i] =
        new RepresentationHolder(
            periodDurationUs,
            trackType,
            representation,
            enableEventMessageTrack,
            closedCaptionFormats,
            playerTrackEmsgHandler);
  }
}
 

private ChunkSampleStream<DashChunkSource> buildSampleStream(TrackGroupInfo trackGroupInfo,
    TrackSelection selection, long positionUs) {
  int embeddedTrackCount = 0;
  int[] embeddedTrackTypes = new int[2];
  Format[] embeddedTrackFormats = new Format[2];
  boolean enableEventMessageTrack =
      trackGroupInfo.embeddedEventMessageTrackGroupIndex != C.INDEX_UNSET;
  if (enableEventMessageTrack) {
    embeddedTrackFormats[embeddedTrackCount] =
        trackGroups.get(trackGroupInfo.embeddedEventMessageTrackGroupIndex).getFormat(0);
    embeddedTrackTypes[embeddedTrackCount++] = C.TRACK_TYPE_METADATA;
  }
  boolean enableCea608Track = trackGroupInfo.embeddedCea608TrackGroupIndex != C.INDEX_UNSET;
  if (enableCea608Track) {
    embeddedTrackFormats[embeddedTrackCount] =
        trackGroups.get(trackGroupInfo.embeddedCea608TrackGroupIndex).getFormat(0);
    embeddedTrackTypes[embeddedTrackCount++] = C.TRACK_TYPE_TEXT;
  }
  if (embeddedTrackCount < embeddedTrackTypes.length) {
    embeddedTrackFormats = Arrays.copyOf(embeddedTrackFormats, embeddedTrackCount);
    embeddedTrackTypes = Arrays.copyOf(embeddedTrackTypes, embeddedTrackCount);
  }
  PlayerTrackEmsgHandler trackPlayerEmsgHandler =
      manifest.dynamic && enableEventMessageTrack
          ? playerEmsgHandler.newPlayerTrackEmsgHandler()
          : null;
  DashChunkSource chunkSource =
      chunkSourceFactory.createDashChunkSource(
          manifestLoaderErrorThrower,
          manifest,
          periodIndex,
          trackGroupInfo.adaptationSetIndices,
          selection,
          trackGroupInfo.trackType,
          elapsedRealtimeOffset,
          enableEventMessageTrack,
          enableCea608Track,
          trackPlayerEmsgHandler,
          transferListener);
  ChunkSampleStream<DashChunkSource> stream =
      new ChunkSampleStream<>(
          trackGroupInfo.trackType,
          embeddedTrackTypes,
          embeddedTrackFormats,
          chunkSource,
          this,
          allocator,
          positionUs,
          minLoadableRetryCount,
          eventDispatcher);
  synchronized (this) {
    // The map is also accessed on the loading thread so synchronize access.
    trackEmsgHandlerBySampleStream.put(stream, trackPlayerEmsgHandler);
  }
  return stream;
}
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the period in the manifest.
 * @param adaptationSetIndices The indices of the adaptation sets in the period.
 * @param trackSelection The track selection.
 * @param trackType The type of the tracks in the selection.
 * @param dataSource A {@link DataSource} suitable for loading the media data.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds, specified
 *     as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param maxSegmentsPerLoad The maximum number of segments to combine into a single request. Note
 *     that segments will only be combined if their {@link Uri}s are the same and if their data
 *     ranges are adjacent.
 * @param enableEventMessageTrack Whether the chunks generated by the source may output an event
 *     message track.
 * @param enableCea608Track Whether the chunks generated by the source may output a CEA-608 track.
 * @param playerTrackEmsgHandler The {@link PlayerTrackEmsgHandler} instance to handle emsg
 *     messages targeting the player. Maybe null if this is not necessary.
 */
public DefaultDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int trackType,
    DataSource dataSource,
    long elapsedRealtimeOffsetMs,
    int maxSegmentsPerLoad,
    boolean enableEventMessageTrack,
    boolean enableCea608Track,
    @Nullable PlayerTrackEmsgHandler playerTrackEmsgHandler) {
  this.manifestLoaderErrorThrower = manifestLoaderErrorThrower;
  this.manifest = manifest;
  this.adaptationSetIndices = adaptationSetIndices;
  this.trackSelection = trackSelection;
  this.trackType = trackType;
  this.dataSource = dataSource;
  this.periodIndex = periodIndex;
  this.elapsedRealtimeOffsetMs = elapsedRealtimeOffsetMs;
  this.maxSegmentsPerLoad = maxSegmentsPerLoad;
  this.playerTrackEmsgHandler = playerTrackEmsgHandler;

  long periodDurationUs = manifest.getPeriodDurationUs(periodIndex);
  liveEdgeTimeUs = C.TIME_UNSET;

  List<Representation> representations = getRepresentations();
  representationHolders = new RepresentationHolder[trackSelection.length()];
  for (int i = 0; i < representationHolders.length; i++) {
    Representation representation = representations.get(trackSelection.getIndexInTrackGroup(i));
    representationHolders[i] =
        new RepresentationHolder(
            periodDurationUs,
            trackType,
            representation,
            enableEventMessageTrack,
            enableCea608Track,
            playerTrackEmsgHandler);
  }
}
 

private ChunkSampleStream<DashChunkSource> buildSampleStream(TrackGroupInfo trackGroupInfo,
    TrackSelection selection, long positionUs) {
  int embeddedTrackCount = 0;
  int[] embeddedTrackTypes = new int[2];
  Format[] embeddedTrackFormats = new Format[2];
  boolean enableEventMessageTrack =
      trackGroupInfo.embeddedEventMessageTrackGroupIndex != C.INDEX_UNSET;
  if (enableEventMessageTrack) {
    embeddedTrackFormats[embeddedTrackCount] =
        trackGroups.get(trackGroupInfo.embeddedEventMessageTrackGroupIndex).getFormat(0);
    embeddedTrackTypes[embeddedTrackCount++] = C.TRACK_TYPE_METADATA;
  }
  boolean enableCea608Track = trackGroupInfo.embeddedCea608TrackGroupIndex != C.INDEX_UNSET;
  if (enableCea608Track) {
    embeddedTrackFormats[embeddedTrackCount] =
        trackGroups.get(trackGroupInfo.embeddedCea608TrackGroupIndex).getFormat(0);
    embeddedTrackTypes[embeddedTrackCount++] = C.TRACK_TYPE_TEXT;
  }
  if (embeddedTrackCount < embeddedTrackTypes.length) {
    embeddedTrackFormats = Arrays.copyOf(embeddedTrackFormats, embeddedTrackCount);
    embeddedTrackTypes = Arrays.copyOf(embeddedTrackTypes, embeddedTrackCount);
  }
  PlayerTrackEmsgHandler trackPlayerEmsgHandler =
      manifest.dynamic && enableEventMessageTrack
          ? playerEmsgHandler.newPlayerTrackEmsgHandler()
          : null;
  DashChunkSource chunkSource =
      chunkSourceFactory.createDashChunkSource(
          manifestLoaderErrorThrower,
          manifest,
          periodIndex,
          trackGroupInfo.adaptationSetIndices,
          selection,
          trackGroupInfo.trackType,
          elapsedRealtimeOffset,
          enableEventMessageTrack,
          enableCea608Track,
          trackPlayerEmsgHandler,
          transferListener);
  ChunkSampleStream<DashChunkSource> stream =
      new ChunkSampleStream<>(
          trackGroupInfo.trackType,
          embeddedTrackTypes,
          embeddedTrackFormats,
          chunkSource,
          this,
          allocator,
          positionUs,
          minLoadableRetryCount,
          eventDispatcher);
  synchronized (this) {
    // The map is also accessed on the loading thread so synchronize access.
    trackEmsgHandlerBySampleStream.put(stream, trackPlayerEmsgHandler);
  }
  return stream;
}
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the period in the manifest.
 * @param adaptationSetIndices The indices of the adaptation sets in the period.
 * @param trackSelection The track selection.
 * @param trackType The type of the tracks in the selection.
 * @param dataSource A {@link DataSource} suitable for loading the media data.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds, specified
 *     as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param maxSegmentsPerLoad The maximum number of segments to combine into a single request. Note
 *     that segments will only be combined if their {@link Uri}s are the same and if their data
 *     ranges are adjacent.
 * @param enableEventMessageTrack Whether the chunks generated by the source may output an event
 *     message track.
 * @param enableCea608Track Whether the chunks generated by the source may output a CEA-608 track.
 * @param playerTrackEmsgHandler The {@link PlayerTrackEmsgHandler} instance to handle emsg
 *     messages targeting the player. Maybe null if this is not necessary.
 */
public DefaultDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int trackType,
    DataSource dataSource,
    long elapsedRealtimeOffsetMs,
    int maxSegmentsPerLoad,
    boolean enableEventMessageTrack,
    boolean enableCea608Track,
    @Nullable PlayerTrackEmsgHandler playerTrackEmsgHandler) {
  this.manifestLoaderErrorThrower = manifestLoaderErrorThrower;
  this.manifest = manifest;
  this.adaptationSetIndices = adaptationSetIndices;
  this.trackSelection = trackSelection;
  this.trackType = trackType;
  this.dataSource = dataSource;
  this.periodIndex = periodIndex;
  this.elapsedRealtimeOffsetMs = elapsedRealtimeOffsetMs;
  this.maxSegmentsPerLoad = maxSegmentsPerLoad;
  this.playerTrackEmsgHandler = playerTrackEmsgHandler;

  long periodDurationUs = manifest.getPeriodDurationUs(periodIndex);
  liveEdgeTimeUs = C.TIME_UNSET;

  List<Representation> representations = getRepresentations();
  representationHolders = new RepresentationHolder[trackSelection.length()];
  for (int i = 0; i < representationHolders.length; i++) {
    Representation representation = representations.get(trackSelection.getIndexInTrackGroup(i));
    representationHolders[i] =
        new RepresentationHolder(
            periodDurationUs,
            trackType,
            representation,
            enableEventMessageTrack,
            enableCea608Track,
            playerTrackEmsgHandler);
  }
}
 

private ChunkSampleStream<DashChunkSource> buildSampleStream(TrackGroupInfo trackGroupInfo,
    TrackSelection selection, long positionUs) {
  int embeddedTrackCount = 0;
  boolean enableEventMessageTrack =
      trackGroupInfo.embeddedEventMessageTrackGroupIndex != C.INDEX_UNSET;
  TrackGroup embeddedEventMessageTrackGroup = null;
  if (enableEventMessageTrack) {
    embeddedEventMessageTrackGroup =
        trackGroups.get(trackGroupInfo.embeddedEventMessageTrackGroupIndex);
    embeddedTrackCount++;
  }
  boolean enableCea608Tracks = trackGroupInfo.embeddedCea608TrackGroupIndex != C.INDEX_UNSET;
  TrackGroup embeddedCea608TrackGroup = null;
  if (enableCea608Tracks) {
    embeddedCea608TrackGroup = trackGroups.get(trackGroupInfo.embeddedCea608TrackGroupIndex);
    embeddedTrackCount += embeddedCea608TrackGroup.length;
  }

  Format[] embeddedTrackFormats = new Format[embeddedTrackCount];
  int[] embeddedTrackTypes = new int[embeddedTrackCount];
  embeddedTrackCount = 0;
  if (enableEventMessageTrack) {
    embeddedTrackFormats[embeddedTrackCount] = embeddedEventMessageTrackGroup.getFormat(0);
    embeddedTrackTypes[embeddedTrackCount] = C.TRACK_TYPE_METADATA;
    embeddedTrackCount++;
  }
  List<Format> embeddedCea608TrackFormats = new ArrayList<>();
  if (enableCea608Tracks) {
    for (int i = 0; i < embeddedCea608TrackGroup.length; i++) {
      embeddedTrackFormats[embeddedTrackCount] = embeddedCea608TrackGroup.getFormat(i);
      embeddedTrackTypes[embeddedTrackCount] = C.TRACK_TYPE_TEXT;
      embeddedCea608TrackFormats.add(embeddedTrackFormats[embeddedTrackCount]);
      embeddedTrackCount++;
    }
  }

  PlayerTrackEmsgHandler trackPlayerEmsgHandler =
      manifest.dynamic && enableEventMessageTrack
          ? playerEmsgHandler.newPlayerTrackEmsgHandler()
          : null;
  DashChunkSource chunkSource =
      chunkSourceFactory.createDashChunkSource(
          manifestLoaderErrorThrower,
          manifest,
          periodIndex,
          trackGroupInfo.adaptationSetIndices,
          selection,
          trackGroupInfo.trackType,
          elapsedRealtimeOffsetMs,
          enableEventMessageTrack,
          embeddedCea608TrackFormats,
          trackPlayerEmsgHandler,
          transferListener);
  ChunkSampleStream<DashChunkSource> stream =
      new ChunkSampleStream<>(
          trackGroupInfo.trackType,
          embeddedTrackTypes,
          embeddedTrackFormats,
          chunkSource,
          this,
          allocator,
          positionUs,
          drmSessionManager,
          loadErrorHandlingPolicy,
          eventDispatcher);
  synchronized (this) {
    // The map is also accessed on the loading thread so synchronize access.
    trackEmsgHandlerBySampleStream.put(stream, trackPlayerEmsgHandler);
  }
  return stream;
}
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the corresponding period in the manifest.
 * @param adaptationSetIndices The indices of the corresponding adaptation sets in the period.
 * @param trackSelection The track selection.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds,
 *     specified as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param enableEventMessageTrack Whether the chunks generated by the source may output an event
 *     message track.
 * @param enableCea608Track Whether the chunks generated by the source may output a CEA-608
 *     track.
 * @param transferListener The transfer listener which should be informed of any data transfers.
 *     May be null if no listener is available.
 * @return The created {@link DashChunkSource}.
 */
DashChunkSource createDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int type,
    long elapsedRealtimeOffsetMs,
    boolean enableEventMessageTrack,
    boolean enableCea608Track,
    @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
    @Nullable TransferListener transferListener);
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the corresponding period in the manifest.
 * @param adaptationSetIndices The indices of the corresponding adaptation sets in the period.
 * @param trackSelection The track selection.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds,
 *     specified as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param enableEventMessageTrack Whether to output an event message track.
 * @param closedCaptionFormats The {@link Format Formats} of closed caption tracks to be output.
 * @param transferListener The transfer listener which should be informed of any data transfers.
 *     May be null if no listener is available.
 * @return The created {@link DashChunkSource}.
 */
DashChunkSource createDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int type,
    long elapsedRealtimeOffsetMs,
    boolean enableEventMessageTrack,
    List<Format> closedCaptionFormats,
    @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
    @Nullable TransferListener transferListener);
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the corresponding period in the manifest.
 * @param adaptationSetIndices The indices of the corresponding adaptation sets in the period.
 * @param trackSelection The track selection.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds,
 *     specified as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param enableEventMessageTrack Whether the chunks generated by the source may output an event
 *     message track.
 * @param enableCea608Track Whether the chunks generated by the source may output a CEA-608
 *     track.
 * @param transferListener The transfer listener which should be informed of any data transfers.
 *     May be null if no listener is available.
 * @return The created {@link DashChunkSource}.
 */
DashChunkSource createDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int type,
    long elapsedRealtimeOffsetMs,
    boolean enableEventMessageTrack,
    boolean enableCea608Track,
    @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
    @Nullable TransferListener transferListener);
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the corresponding period in the manifest.
 * @param adaptationSetIndices The indices of the corresponding adaptation sets in the period.
 * @param trackSelection The track selection.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds,
 *     specified as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param enableEventMessageTrack Whether to output an event message track.
 * @param closedCaptionFormats The {@link Format Formats} of closed caption tracks to be output.
 * @param transferListener The transfer listener which should be informed of any data transfers.
 *     May be null if no listener is available.
 * @return The created {@link DashChunkSource}.
 */
DashChunkSource createDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int type,
    long elapsedRealtimeOffsetMs,
    boolean enableEventMessageTrack,
    List<Format> closedCaptionFormats,
    @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
    @Nullable TransferListener transferListener);
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the corresponding period in the manifest.
 * @param adaptationSetIndices The indices of the corresponding adaptation sets in the period.
 * @param trackSelection The track selection.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds,
 *     specified as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param enableEventMessageTrack Whether to output an event message track.
 * @param closedCaptionFormats The {@link Format Formats} of closed caption tracks to be output.
 * @param transferListener The transfer listener which should be informed of any data transfers.
 *     May be null if no listener is available.
 * @return The created {@link DashChunkSource}.
 */
DashChunkSource createDashChunkSource(
    LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest,
    int periodIndex,
    int[] adaptationSetIndices,
    TrackSelection trackSelection,
    int type,
    long elapsedRealtimeOffsetMs,
    boolean enableEventMessageTrack,
    List<Format> closedCaptionFormats,
    @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
    @Nullable TransferListener transferListener);