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<h2 title="Interface DataReader" class="title">Interface DataReader</h2>
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<dt>All Known Subinterfaces:</dt>
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<hr>
<pre>public interface <span class="typeNameLabel">DataReader</span></pre>
<div class="block">Reads bytes from a data stream.</div>
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<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../com/google/android/exoplayer2/upstream/DataReader.html#read-byte:A-int-int-">read</a></span>&#8203;(byte[]&nbsp;target,
int&nbsp;offset,
int&nbsp;length)</code></th>
<td class="colLast">
<div class="block">Reads up to <code>length</code> bytes of data from the input.</div>
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<h4>read</h4>
<pre>int&nbsp;read&#8203;(byte[]&nbsp;target,
int&nbsp;offset,
int&nbsp;length)
throws <a href="https://developer.android.com/reference/java/io/IOException.html" title="class or interface in java.io" class="externalLink" target="_top">IOException</a></pre>
<div class="block">Reads up to <code>length</code> bytes of data from the input.
<p>If <code>readLength</code> is zero then 0 is returned. Otherwise, if no data is available because
the end of the opened range has been reached, then <a href="../../../../../com/google/android/exoplayer2/C.html#RESULT_END_OF_INPUT"><code>C.RESULT_END_OF_INPUT</code></a> is returned.
Otherwise, the call will block until at least one byte of data has been read and the number of
bytes read is returned.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>target</code> - A target array into which data should be written.</dd>
<dd><code>offset</code> - The offset into the target array at which to write.</dd>
<dd><code>length</code> - The maximum number of bytes to read from the input.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The number of bytes read, or <a href="../../../../../com/google/android/exoplayer2/C.html#RESULT_END_OF_INPUT"><code>C.RESULT_END_OF_INPUT</code></a> if the input has ended. This
may be less than <code>length</code> because the end of the input (or available data) was
reached, the method was interrupted, or the operation was aborted early for another reason.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://developer.android.com/reference/java/io/IOException.html" title="class or interface in java.io" class="externalLink" target="_top">IOException</a></code> - If an error occurs reading from the input.</dd>
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