@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; } }