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<h2 title="Class CodecSpecificDataUtil" class="title">Class CodecSpecificDataUtil</h2>
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<ul class="inheritance">
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<li><a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">java.lang.Object</a></li>
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<li>com.google.android.exoplayer2.util.CodecSpecificDataUtil</li>
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<pre>public final class <span class="typeNameLabel">CodecSpecificDataUtil</span>
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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>
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<div class="block">Provides utilities for handling various types of codec-specific data.</div>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colSecond" scope="col">Method</th>
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<th class="colLast" scope="col">Description</th>
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</tr>
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<tr id="i0" class="altColor">
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<td class="colFirst"><code>static <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>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../com/google/android/exoplayer2/util/CodecSpecificDataUtil.html#buildAvcCodecString-int-int-int-">buildAvcCodecString</a></span>​(int profileIdc,
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int constraintsFlagsAndReservedZero2Bits,
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int levelIdc)</code></th>
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<td class="colLast">
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<div class="block">Builds an RFC 6381 AVC codec string using the provided parameters.</div>
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</td>
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</tr>
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<tr id="i1" class="rowColor">
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<td class="colFirst"><code>static <a href="https://developer.android.com/reference/java/util/List.html" title="class or interface in java.util" class="externalLink" target="_top">List</a><byte[]></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../com/google/android/exoplayer2/util/CodecSpecificDataUtil.html#buildCea708InitializationData-boolean-">buildCea708InitializationData</a></span>​(boolean isWideAspectRatio)</code></th>
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<td class="colLast">
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<div class="block">Returns initialization data for formats with MIME type <a href="../../../../../com/google/android/exoplayer2/util/MimeTypes.html#APPLICATION_CEA708"><code>MimeTypes.APPLICATION_CEA708</code></a>.</div>
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<td class="colFirst"><code>static <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>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../com/google/android/exoplayer2/util/CodecSpecificDataUtil.html#buildHevcCodecStringFromSps-com.google.android.exoplayer2.util.ParsableNalUnitBitArray-">buildHevcCodecStringFromSps</a></span>​(<a href="../../../../../com/google/android/exoplayer2/util/ParsableNalUnitBitArray.html" title="class in com.google.android.exoplayer2.util">ParsableNalUnitBitArray</a> bitArray)</code></th>
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<td class="colLast">
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<div class="block">Returns an RFC 6381 HEVC codec string based on the SPS NAL unit read from the provided bit
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array.</div>
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<td class="colFirst"><code>static byte[]</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../com/google/android/exoplayer2/util/CodecSpecificDataUtil.html#buildNalUnit-byte:A-int-int-">buildNalUnit</a></span>​(byte[] data,
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int offset,
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int length)</code></th>
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<td class="colLast">
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<div class="block">Constructs a NAL unit consisting of the NAL start code followed by the specified data.</div>
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</td>
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<tr id="i4" class="altColor">
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<td class="colFirst"><code>static <a href="https://developer.android.com/reference/android/util/Pair.html" title="class or interface in android.util" class="externalLink">Pair</a><<a href="https://developer.android.com/reference/java/lang/Integer.html?is-external=true" title="class or interface in java.lang" class="externalLink">Integer</a>,<a href="https://developer.android.com/reference/java/lang/Integer.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_top">Integer</a>></code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../com/google/android/exoplayer2/util/CodecSpecificDataUtil.html#parseAlacAudioSpecificConfig-byte:A-">parseAlacAudioSpecificConfig</a></span>​(byte[] audioSpecificConfig)</code></th>
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<td class="colLast">
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<div class="block">Parses an ALAC AudioSpecificConfig (i.e.</div>
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</td>
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</tr>
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<tr id="i5" class="rowColor">
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<td class="colFirst"><code>static boolean</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../com/google/android/exoplayer2/util/CodecSpecificDataUtil.html#parseCea708InitializationData-java.util.List-">parseCea708InitializationData</a></span>​(<a href="https://developer.android.com/reference/java/util/List.html" title="class or interface in java.util" class="externalLink" target="_top">List</a><byte[]> initializationData)</code></th>
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<td class="colLast">
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<div class="block">Returns whether the CEA-708 closed caption service with the given initialization data is
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formatted for displays with 16:9 aspect ratio.</div>
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</td>
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<tr id="i6" class="altColor">
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<td class="colFirst"><code>static byte[][]</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../com/google/android/exoplayer2/util/CodecSpecificDataUtil.html#splitNalUnits-byte:A-">splitNalUnits</a></span>​(byte[] data)</code></th>
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<td class="colLast">
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<div class="block">Splits an array of NAL units.</div>
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<code><a href="https://developer.android.com/reference/java/lang/Object.html#clone--" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang" class="externalLink">toString</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang" class="externalLink" target="_top">wait</a></code></li>
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<h4>parseAlacAudioSpecificConfig</h4>
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<pre>public static <a href="https://developer.android.com/reference/android/util/Pair.html" title="class or interface in android.util" class="externalLink">Pair</a><<a href="https://developer.android.com/reference/java/lang/Integer.html?is-external=true" title="class or interface in java.lang" class="externalLink">Integer</a>,<a href="https://developer.android.com/reference/java/lang/Integer.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_top">Integer</a>> parseAlacAudioSpecificConfig​(byte[] audioSpecificConfig)</pre>
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<div class="block">Parses an ALAC AudioSpecificConfig (i.e. an <a href="https://github.com/macosforge/alac/blob/master/ALACMagicCookieDescription.txt">ALACSpecificConfig</a>).</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>audioSpecificConfig</code> - A byte array containing the AudioSpecificConfig to parse.</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>A pair consisting of the sample rate in Hz and the channel count.</dd>
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<pre>public static <a href="https://developer.android.com/reference/java/util/List.html" title="class or interface in java.util" class="externalLink" target="_top">List</a><byte[]> buildCea708InitializationData​(boolean isWideAspectRatio)</pre>
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<div class="block">Returns initialization data for formats with MIME type <a href="../../../../../com/google/android/exoplayer2/util/MimeTypes.html#APPLICATION_CEA708"><code>MimeTypes.APPLICATION_CEA708</code></a>.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>isWideAspectRatio</code> - Whether the CEA-708 closed caption service is formatted for displays
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with 16:9 aspect ratio.</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>Initialization data for formats with MIME type <a href="../../../../../com/google/android/exoplayer2/util/MimeTypes.html#APPLICATION_CEA708"><code>MimeTypes.APPLICATION_CEA708</code></a>.</dd>
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<h4>parseCea708InitializationData</h4>
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<pre>public static boolean parseCea708InitializationData​(<a href="https://developer.android.com/reference/java/util/List.html" title="class or interface in java.util" class="externalLink" target="_top">List</a><byte[]> initializationData)</pre>
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<div class="block">Returns whether the CEA-708 closed caption service with the given initialization data is
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formatted for displays with 16:9 aspect ratio.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>initializationData</code> - The initialization data to parse.</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>Whether the CEA-708 closed caption service is formatted for displays with 16:9 aspect
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ratio.</dd>
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<pre>public static <a href="https://developer.android.com/reference/java/lang/String.html" title="class or interface in java.lang" class="externalLink" target="_top">String</a> buildAvcCodecString​(int profileIdc,
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int constraintsFlagsAndReservedZero2Bits,
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int levelIdc)</pre>
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<div class="block">Builds an RFC 6381 AVC codec string using the provided parameters.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>profileIdc</code> - The encoding profile.</dd>
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<dd><code>constraintsFlagsAndReservedZero2Bits</code> - The constraint flags followed by the reserved zero
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2 bits, all contained in the least significant byte of the integer.</dd>
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<dd><code>levelIdc</code> - The encoding level.</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>An RFC 6381 AVC codec string built using the provided parameters.</dd>
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</dl>
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<pre>public static <a href="https://developer.android.com/reference/java/lang/String.html" title="class or interface in java.lang" class="externalLink">String</a> buildHevcCodecStringFromSps​(<a href="../../../../../com/google/android/exoplayer2/util/ParsableNalUnitBitArray.html" title="class in com.google.android.exoplayer2.util" target="_top">ParsableNalUnitBitArray</a> bitArray)</pre>
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<div class="block">Returns an RFC 6381 HEVC codec string based on the SPS NAL unit read from the provided bit
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array. The position of the bit array must be the start of an SPS NALU (nal_unit_header), and
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the position may be modified by this method.</div>
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</li>
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</ul>
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<h4>buildNalUnit</h4>
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<pre>public static byte[] buildNalUnit​(byte[] data,
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int offset,
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int length)</pre>
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<div class="block">Constructs a NAL unit consisting of the NAL start code followed by the specified data.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>data</code> - An array containing the data that should follow the NAL start code.</dd>
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<dd><code>offset</code> - The start offset into <code>data</code>.</dd>
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<dd><code>length</code> - The number of bytes to copy from <code>data</code></dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>The constructed NAL unit.</dd>
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</dl>
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<a name="splitNalUnits-byte:A-">
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<h4>splitNalUnits</h4>
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<pre>@Nullable
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public static byte[][] splitNalUnits​(byte[] data)</pre>
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<div class="block">Splits an array of NAL units.
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<p>If the input consists of NAL start code delimited units, then the returned array consists of
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the split NAL units, each of which is still prefixed with the NAL start code. For any other
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input, null is returned.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>data</code> - An array of data.</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>The individual NAL units, or null if the input did not consist of NAL start code
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delimited units.</dd>
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