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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">com.google.android.exoplayer2.util</a></div>
<h2 title="Class ParsableBitArray" class="title">Class ParsableBitArray</h2>
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<pre>public final class <span class="typeNameLabel">ParsableBitArray</span>
extends <a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a></pre>
<div class="block">Wraps a byte array, providing methods that allow it to be read as a bitstream.</div>
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<th class="colSecond" scope="col">Field</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>byte[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#data">data</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<th class="colFirst" scope="col">Constructor</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">ParsableBitArray</a></span>()</code></th>
<td class="colLast">
<div class="block">Creates a new instance that initially has no backing data.</div>
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<tr class="rowColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(byte%5B%5D)">ParsableBitArray</a></span>&#8203;(byte[]&nbsp;data)</code></th>
<td class="colLast">
<div class="block">Creates a new instance that wraps an existing array.</div>
</td>
</tr>
<tr class="altColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(byte%5B%5D,int)">ParsableBitArray</a></span>&#8203;(byte[]&nbsp;data,
int&nbsp;limit)</code></th>
<td class="colLast">
<div class="block">Creates a new instance that wraps an existing array.</div>
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<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#bitsLeft()">bitsLeft</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the number of bits yet to be read.</div>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#byteAlign()">byteAlign</a></span>()</code></th>
<td class="colLast">
<div class="block">Aligns the position to the next byte boundary.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getBytePosition()">getBytePosition</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the current byte offset.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getPosition()">getPosition</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the current bit offset.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#putInt(int,int)">putInt</a></span>&#8203;(int&nbsp;value,
int&nbsp;numBits)</code></th>
<td class="colLast">
<div class="block">Overwrites <code>numBits</code> from this array using the <code>numBits</code> least significant bits
from <code>value</code>.</div>
</td>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readBit()">readBit</a></span>()</code></th>
<td class="colLast">
<div class="block">Reads a single bit.</div>
</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readBits(byte%5B%5D,int,int)">readBits</a></span>&#8203;(byte[]&nbsp;buffer,
int&nbsp;offset,
int&nbsp;numBits)</code></th>
<td class="colLast">
<div class="block">Reads <code>numBits</code> bits into <code>buffer</code>.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readBits(int)">readBits</a></span>&#8203;(int&nbsp;numBits)</code></th>
<td class="colLast">
<div class="block">Reads up to 32 bits.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readBitsToLong(int)">readBitsToLong</a></span>&#8203;(int&nbsp;numBits)</code></th>
<td class="colLast">
<div class="block">Reads up to 64 bits.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readBytes(byte%5B%5D,int,int)">readBytes</a></span>&#8203;(byte[]&nbsp;buffer,
int&nbsp;offset,
int&nbsp;length)</code></th>
<td class="colLast">
<div class="block">Reads the next <code>length</code> bytes into <code>buffer</code>.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code><a href="https://developer.android.com/reference/java/lang/String.html" title="class or interface in java.lang" class="externalLink" target="_top">String</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readBytesAsString(int)">readBytesAsString</a></span>&#8203;(int&nbsp;length)</code></th>
<td class="colLast">
<div class="block">Reads the next <code>length</code> bytes as a UTF-8 string.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code><a href="https://developer.android.com/reference/java/lang/String.html" title="class or interface in java.lang" class="externalLink" target="_top">String</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readBytesAsString(int,java.nio.charset.Charset)">readBytesAsString</a></span>&#8203;(int&nbsp;length,
<a href="https://developer.android.com/reference/java/nio/charset/Charset.html" title="class or interface in java.nio.charset" class="externalLink" target="_top">Charset</a>&nbsp;charset)</code></th>
<td class="colLast">
<div class="block">Reads the next <code>length</code> bytes as a string encoded in <a href="https://developer.android.com/reference/java/nio/charset/Charset.html" title="class or interface in java.nio.charset" class="externalLink" target="_top"><code>Charset</code></a>.</div>
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<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reset(byte%5B%5D)">reset</a></span>&#8203;(byte[]&nbsp;data)</code></th>
<td class="colLast">
<div class="block">Updates the instance to wrap <code>data</code>, and resets the position to zero.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reset(byte%5B%5D,int)">reset</a></span>&#8203;(byte[]&nbsp;data,
int&nbsp;limit)</code></th>
<td class="colLast">
<div class="block">Updates the instance to wrap <code>data</code>, and resets the position to zero.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reset(com.google.android.exoplayer2.util.ParsableByteArray)">reset</a></span>&#8203;(<a href="ParsableByteArray.html" title="class in com.google.android.exoplayer2.util">ParsableByteArray</a>&nbsp;parsableByteArray)</code></th>
<td class="colLast">
<div class="block">Sets this instance's data, position and limit to match the provided <code>parsableByteArray</code>.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setPosition(int)">setPosition</a></span>&#8203;(int&nbsp;position)</code></th>
<td class="colLast">
<div class="block">Sets the current bit offset.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#skipBit()">skipBit</a></span>()</code></th>
<td class="colLast">
<div class="block">Skips a single bit.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#skipBits(int)">skipBits</a></span>&#8203;(int&nbsp;numBits)</code></th>
<td class="colLast">
<div class="block">Skips bits and moves current reading position forward.</div>
</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#skipBytes(int)">skipBytes</a></span>&#8203;(int&nbsp;length)</code></th>
<td class="colLast">
<div class="block">Skips the next <code>length</code> bytes.</div>
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<pre>public&nbsp;byte[] data</pre>
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<h4>ParsableBitArray</h4>
<pre>public&nbsp;ParsableBitArray()</pre>
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<pre>public&nbsp;ParsableBitArray&#8203;(byte[]&nbsp;data)</pre>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>data</code> - The data to wrap.</dd>
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<pre>public&nbsp;ParsableBitArray&#8203;(byte[]&nbsp;data,
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<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>data</code> - The data to wrap.</dd>
<dd><code>limit</code> - The limit in bytes.</dd>
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<pre class="methodSignature">public&nbsp;void&nbsp;reset&#8203;(byte[]&nbsp;data)</pre>
<div class="block">Updates the instance to wrap <code>data</code>, and resets the position to zero.</div>
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<pre class="methodSignature">public&nbsp;void&nbsp;reset&#8203;(<a href="ParsableByteArray.html" title="class in com.google.android.exoplayer2.util">ParsableByteArray</a>&nbsp;parsableByteArray)</pre>
<div class="block">Sets this instance's data, position and limit to match the provided <code>parsableByteArray</code>.
Any modifications to the underlying data array will be visible in both instances</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>parsableByteArray</code> - The <a href="ParsableByteArray.html" title="class in com.google.android.exoplayer2.util"><code>ParsableByteArray</code></a>.</dd>
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<pre class="methodSignature">public&nbsp;void&nbsp;reset&#8203;(byte[]&nbsp;data,
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<div class="block">Updates the instance to wrap <code>data</code>, and resets the position to zero.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>data</code> - The array to wrap.</dd>
<dd><code>limit</code> - The limit in bytes.</dd>
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<h4>bitsLeft</h4>
<pre class="methodSignature">public&nbsp;int&nbsp;bitsLeft()</pre>
<div class="block">Returns the number of bits yet to be read.</div>
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<h4>getPosition</h4>
<pre class="methodSignature">public&nbsp;int&nbsp;getPosition()</pre>
<div class="block">Returns the current bit offset.</div>
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<h4>getBytePosition</h4>
<pre class="methodSignature">public&nbsp;int&nbsp;getBytePosition()</pre>
<div class="block">Returns the current byte offset. Must only be called when the position is byte aligned.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://developer.android.com/reference/java/lang/IllegalStateException.html" title="class or interface in java.lang" class="externalLink" target="_top">IllegalStateException</a></code> - If the position isn't byte aligned.</dd>
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<h4>setPosition</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;setPosition&#8203;(int&nbsp;position)</pre>
<div class="block">Sets the current bit offset.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>position</code> - The position to set.</dd>
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<h4>skipBit</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;skipBit()</pre>
<div class="block">Skips a single bit.</div>
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<h4>skipBits</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;skipBits&#8203;(int&nbsp;numBits)</pre>
<div class="block">Skips bits and moves current reading position forward.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>numBits</code> - The number of bits to skip.</dd>
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<h4>readBit</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;readBit()</pre>
<div class="block">Reads a single bit.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Whether the bit is set.</dd>
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<h4>readBits</h4>
<pre class="methodSignature">public&nbsp;int&nbsp;readBits&#8203;(int&nbsp;numBits)</pre>
<div class="block">Reads up to 32 bits.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>numBits</code> - The number of bits to read.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>An integer whose bottom <code>numBits</code> bits hold the read data.</dd>
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<pre class="methodSignature">public&nbsp;long&nbsp;readBitsToLong&#8203;(int&nbsp;numBits)</pre>
<div class="block">Reads up to 64 bits.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>numBits</code> - The number of bits to read.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A long whose bottom <code>numBits</code> bits hold the read data.</dd>
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<pre class="methodSignature">public&nbsp;void&nbsp;readBits&#8203;(byte[]&nbsp;buffer,
int&nbsp;offset,
int&nbsp;numBits)</pre>
<div class="block">Reads <code>numBits</code> bits into <code>buffer</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buffer</code> - The array into which the read data should be written. The trailing <code>numBits
% 8</code> bits are written into the most significant bits of the last modified <code>buffer</code>
byte. The remaining ones are unmodified.</dd>
<dd><code>offset</code> - The offset in <code>buffer</code> at which the read data should be written.</dd>
<dd><code>numBits</code> - The number of bits to read.</dd>
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<h4>byteAlign</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;byteAlign()</pre>
<div class="block">Aligns the position to the next byte boundary. Does nothing if the position is already aligned.</div>
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<pre class="methodSignature">public&nbsp;void&nbsp;readBytes&#8203;(byte[]&nbsp;buffer,
int&nbsp;offset,
int&nbsp;length)</pre>
<div class="block">Reads the next <code>length</code> bytes into <code>buffer</code>. Must only be called when the position
is byte aligned.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buffer</code> - The array into which the read data should be written.</dd>
<dd><code>offset</code> - The offset in <code>buffer</code> at which the read data should be written.</dd>
<dd><code>length</code> - The number of bytes to read.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://developer.android.com/reference/java/lang/IllegalStateException.html" title="class or interface in java.lang" class="externalLink" target="_top">IllegalStateException</a></code> - If the position isn't byte aligned.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="https://developer.android.com/reference/java/lang/System.html#arraycopy(java.lang.Object,int,java.lang.Object,int,int)" title="class or interface in java.lang" class="externalLink" target="_top"><code>System.arraycopy(Object, int, Object, int, int)</code></a></dd>
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<pre class="methodSignature">public&nbsp;void&nbsp;skipBytes&#8203;(int&nbsp;length)</pre>
<div class="block">Skips the next <code>length</code> bytes. Must only be called when the position is byte aligned.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>length</code> - The number of bytes to read.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://developer.android.com/reference/java/lang/IllegalStateException.html" title="class or interface in java.lang" class="externalLink" target="_top">IllegalStateException</a></code> - If the position isn't byte aligned.</dd>
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<h4>readBytesAsString</h4>
<pre class="methodSignature">public&nbsp;<a href="https://developer.android.com/reference/java/lang/String.html" title="class or interface in java.lang" class="externalLink" target="_top">String</a>&nbsp;readBytesAsString&#8203;(int&nbsp;length)</pre>
<div class="block">Reads the next <code>length</code> bytes as a UTF-8 string. Must only be called when the position is
byte aligned.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>length</code> - The number of bytes to read.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The string encoded by the bytes in UTF-8.</dd>
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<a id="readBytesAsString(int,java.nio.charset.Charset)">
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<h4>readBytesAsString</h4>
<pre class="methodSignature">public&nbsp;<a href="https://developer.android.com/reference/java/lang/String.html" title="class or interface in java.lang" class="externalLink" target="_top">String</a>&nbsp;readBytesAsString&#8203;(int&nbsp;length,
<a href="https://developer.android.com/reference/java/nio/charset/Charset.html" title="class or interface in java.nio.charset" class="externalLink" target="_top">Charset</a>&nbsp;charset)</pre>
<div class="block">Reads the next <code>length</code> bytes as a string encoded in <a href="https://developer.android.com/reference/java/nio/charset/Charset.html" title="class or interface in java.nio.charset" class="externalLink" target="_top"><code>Charset</code></a>. Must only be called
when the position is byte aligned.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>length</code> - The number of bytes to read.</dd>
<dd><code>charset</code> - The character set of the encoded characters.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The string encoded by the bytes in the specified character set.</dd>
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<h4>putInt</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;putInt&#8203;(int&nbsp;value,
int&nbsp;numBits)</pre>
<div class="block">Overwrites <code>numBits</code> from this array using the <code>numBits</code> least significant bits
from <code>value</code>. Bits are written in order from most significant to least significant. The
read position is advanced by <code>numBits</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>value</code> - The integer whose <code>numBits</code> least significant bits are written into <a href="#data"><code>data</code></a>.</dd>
<dd><code>numBits</code> - The number of bits to write.</dd>
</dl>
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