 com.google.android.exoplayer2.upstream">DataSource</a>&nbsp;source)</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="BandwidthEstimator.html#onTransferStart(com.google.android.exoplayer2.upstream.DataSource)">BandwidthEstimator</a></code></span></div>
<div class="block">Called when a transfer starts.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by