android - 如何在 ExoPlayer 2 中使用自定义数据源？

Question

DefaultBandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(this,
    Util.getUserAgent(this, "yourApplicationName"), bandwidthMeter);
ExtractorsFactory extractorsFactory = new DefaultExtractorsFactory();
MediaSource videoSource = new ExtractorMediaSource(mp4VideoUri,
    dataSourceFactory, extractorsFactory, null, null);
player.prepare(videoSource);

如何在 ExoPlayer 2 中使用自定义数据源或 AesCipherDataSource。我尝试在 google 中搜索，但根本没有解决方案