title: ExoPlayer: get songs metadata from HTTP stream
body: <p>I use the following code to play a music stream through ExoPlayer:</p>
  
  <pre><code>        exoPlayer = ExoPlayer.Factory.newInstance(numRenderers, minBufSize, maxBufSize);
          String url = Helper.getPr().getString("url", "http://mp3.nashe.ru:80/ultra-128.mp3");
          Uri uri = Uri.parse(url);
          Log.i(TAG, "Going to open " + url);
          Allocator allocator = new DefaultAllocator(BUFFER_SEGMENT_SIZE);
          DataSource dataSource = new DefaultUriDataSource(getApplicationContext(), USER_AGENT);
          ExtractorSampleSource sampleSource = new ExtractorSampleSource(uri, dataSource, allocator, BUFFER_SEGMENT_COUNT * BUFFER_SEGMENT_SIZE);
          audioRenderer = new MediaCodecAudioTrackRenderer(sampleSource);
          exoPlayer.addListener(this);
          exoPlayer.sendMessage(audioRenderer, MediaCodecAudioTrackRenderer.MSG_SET_VOLUME, volume);
          exoPlayer.prepare(audioRenderer); 
          exoPlayer.setPlayWhenReady(true);
  </code></pre>
  
  <p>I can't find any info on how to get metadata like artist and name of the current song.  Is it possible to get the metadata and if yes, how?<br>
  Thanks a lot.</p>