c&nbsp;<a href="../../source/MediaPeriod.html" title="interface in com.google.android.exoplayer2.source">MediaPeriod</a>&nbsp;createPeriod&#8203;(<a href="../../source/MediaSource.MediaPeriodId.html" title="class in com.google.android.exoplayer2.source">MediaSource.MediaPeriodId</a>&nbsp;id,
                                <a href="../../upstream/Allocator.html" title="interface in com.google.android.exoplayer2.upstream">Allocator</a>&nbsp;allocator,
                                long&nbsp;startPositionUs