How to use

MetadataTrackRenderer

in

com.google.android.exoplayer.metadata

@Override
protected void doSomeWork(long positionUs, long elapsedRealtimeUs) throws ExoPlaybackException {
 continueBufferingSource(positionUs);
 if (!inputStreamEnded && pendingMetadata == null) {
  int result = readSource(positionUs, formatHolder, sampleHolder, false);
  if (result == SampleSource.SAMPLE_READ) {
   pendingMetadataTimestamp = sampleHolder.timeUs;
   try {
    pendingMetadata = metadataParser.parse(sampleHolder.data.array(), sampleHolder.size);
   } catch (IOException e) {
    throw new ExoPlaybackException(e);
   }
   sampleHolder.data.clear();
  } else if (result == SampleSource.END_OF_STREAM) {
   inputStreamEnded = true;
  }
 }
 if (pendingMetadata != null && pendingMetadataTimestamp <= positionUs) {
  invokeRenderer(pendingMetadata);
  pendingMetadata = null;
 }
}

@SuppressWarnings("unchecked")
@Override
public boolean handleMessage(Message msg) {
 switch (msg.what) {
  case MSG_INVOKE_RENDERER:
   invokeRendererInternal((T) msg.obj);
   return true;
 }
 return false;
}

MediaCodecAudioTrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(sampleSource,
  null, true, player.getMainHandler(), player, AudioCapabilities.getCapabilities(context));
MetadataTrackRenderer<Map<String, Object>> id3Renderer = new MetadataTrackRenderer<>(
  sampleSource, new Id3Parser(), player, mainHandler.getLooper());
Eia608TrackRenderer closedCaptionRenderer = new Eia608TrackRenderer(sampleSource, player,

MediaCodecAudioTrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(sampleSource,
  null, true, player.getMainHandler(), player, AudioCapabilities.getCapabilities(context));
MetadataTrackRenderer<Map<String, Object>> id3Renderer = new MetadataTrackRenderer<>(
  sampleSource, new Id3Parser(), player, mainHandler.getLooper());
Eia608TrackRenderer closedCaptionRenderer = new Eia608TrackRenderer(sampleSource, player,

  MediaCodecSelector.DEFAULT, null, true, player.getMainHandler(), player,
  AudioCapabilities.getCapabilities(context), AudioManager.STREAM_MUSIC);
MetadataTrackRenderer<Map<String, Object>> id3Renderer = new MetadataTrackRenderer<>(
  sampleSource, new Id3Parser(), player, mainHandler.getLooper());

private void invokeRenderer(T metadata) {
 if (metadataHandler != null) {
  metadataHandler.obtainMessage(MSG_INVOKE_RENDERER, metadata).sendToTarget();
 } else {
  invokeRendererInternal(metadata);
 }
}

  sampleSource, MediaCodecSelector.DEFAULT, MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT,
  5000, mainHandler, player, 50);
MetadataTrackRenderer<List<Id3Frame>> id3Renderer = new MetadataTrackRenderer<>(
  sampleSource, new Id3Parser(), player, mainHandler.getLooper());

    sampleSource, MediaCodecSelector.DEFAULT, null, true, player.getMainHandler(),
    player, AudioCapabilities.getCapabilities(context), AudioManager.STREAM_MUSIC);
MetadataTrackRenderer<List<Id3Frame>> id3Renderer = new MetadataTrackRenderer<>(
    sampleSource, new Id3Parser(), player, mainHandler.getLooper());

  sampleSource, MediaCodecSelector.DEFAULT, MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT,
  5000, mainHandler, player, 50);
MetadataTrackRenderer<List<Id3Frame>> id3Renderer = new MetadataTrackRenderer<>(
  sampleSource, new Id3Parser(), player, mainHandler.getLooper());

  sampleSource, MediaCodecSelector.DEFAULT, MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT,
  5000, mainHandler, player, 50);
MetadataTrackRenderer<List<Id3Frame>> id3Renderer = new MetadataTrackRenderer<>(
  sampleSource, new Id3Parser(), player, mainHandler.getLooper());

    sampleSource, MediaCodecSelector.DEFAULT,
    MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT, 5000, handler, eventProxy, 50);
MetadataTrackRenderer<List<Id3Frame>> id3Renderer = new MetadataTrackRenderer<>(
    sampleSource, new Id3Parser(), eventProxy, handler.getLooper());