boolean hasTimeline() {
            return !timeline.isEmpty();
        }
The segment repeat count. Specifies the number of contiguous segments with
duration d, that follow the first segment (r=2 means first segment plus two
following segments, a total of 3).
A negative number tells that there are contiguous segments until the start of the
next timeline entry, the end of the period, or the next MPD update.
The default is 0.
MediaPlayer-DASH/src/main/java/net/protyposis/android/mediaplayer/dash/DashParser.java