What is MediaPlayer.OnInfoListener "code 973"?

Question

I am launching a stream through MediaPlayer.

I use MediaPlayer.OnInfoListener to get information about the streaming process.

Here is my code:

 mPlayer.setOnInfoListener(new MediaPlayer.OnInfoListener() {
            @Override
            public boolean onInfo(MediaPlayer mediaPlayer, int infoCode, int i2) {
                Log.d(TAG, "MediaPlayer.OnInfoListener: " + infoCode);
                return false;
            }
        });

I get infoCode = 973.

I can not find it in the documentation: http://developer.android.com/reference/android/media/MediaPlayer.html

What does it mean?