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<li class="navelem"><a class="el" href="../../d8/daf/namespaceshaka.html">shaka</a></li><li class="navelem"><b>media</b></li><li class="navelem"><a class="el" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html">NaluReader</a></li> </ul>
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</div><!-- top -->
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<div class="summary">
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<a href="#pub-types">Public Types</a> |
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<a href="#pub-methods">Public Member Functions</a> |
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<a href="#pub-static-methods">Static Public Member Functions</a> |
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<a href="../../d8/da6/classshaka_1_1media_1_1NaluReader-members.html">List of all members</a> </div>
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<div class="headertitle">
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<div class="title">shaka::media::NaluReader Class Reference</div> </div>
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</div><!--header-->
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<div class="contents">
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<p><code>#include <<a class="el" href="../../d4/d87/nalu__reader_8h_source.html">nalu_reader.h</a>></code></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
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Public Types</h2></td></tr>
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<tr class="memitem:aad5f0714659461429e2616f8186f4d53"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><b>Result</b> { <b>kOk</b>,
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<b>kInvalidStream</b>,
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<b>kEOStream</b>
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}</td></tr>
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<tr class="separator:aad5f0714659461429e2616f8186f4d53"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
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Public Member Functions</h2></td></tr>
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<tr class="memitem:a2d1611fe3e60fc6570fe0c21e13911b0"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a2d1611fe3e60fc6570fe0c21e13911b0">NaluReader</a> (Nalu::CodecType type, uint8_t nal_length_size, const uint8_t *stream, uint64_t stream_size)</td></tr>
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<tr class="separator:a2d1611fe3e60fc6570fe0c21e13911b0"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a6890eb05c83bb540af84494ed0590c6b"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a6890eb05c83bb540af84494ed0590c6b">NaluReader</a> (Nalu::CodecType type, uint8_t nal_length_size, const uint8_t *stream, uint64_t stream_size, const std::vector< <a class="el" href="../../d1/d34/structshaka_1_1media_1_1SubsampleEntry.html">SubsampleEntry</a> > &subsamples)</td></tr>
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<tr class="separator:a6890eb05c83bb540af84494ed0590c6b"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ae051f1f92d84acfcd4cc159d972d647a"><td class="memItemLeft" align="right" valign="top">Result </td><td class="memItemRight" valign="bottom"><a class="el" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#ae051f1f92d84acfcd4cc159d972d647a">Advance</a> (<a class="el" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html">Nalu</a> *nalu)</td></tr>
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<tr class="separator:ae051f1f92d84acfcd4cc159d972d647a"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a9ed9d56a06f43717cdb7035f86075975"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a9ed9d56a06f43717cdb7035f86075975">StartsWithStartCode</a> ()</td></tr>
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<tr class="separator:a9ed9d56a06f43717cdb7035f86075975"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
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Static Public Member Functions</h2></td></tr>
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<tr class="memitem:ae7407c5437c807a51e8611a40a798966"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ae7407c5437c807a51e8611a40a798966"></a>
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static bool </td><td class="memItemRight" valign="bottom"><b>FindStartCode</b> (const uint8_t *data, uint64_t data_size, uint64_t *offset, uint8_t *start_code_size)</td></tr>
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<tr class="separator:ae7407c5437c807a51e8611a40a798966"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aa14b3cd5da5657d8a3d0ecfdf301a184"><td class="memItemLeft" align="right" valign="top">static bool </td><td class="memItemRight" valign="bottom"><a class="el" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#aa14b3cd5da5657d8a3d0ecfdf301a184">FindStartCodeInClearRange</a> (const uint8_t *data, uint64_t data_size, uint64_t *offset, uint8_t *start_code_size, const std::vector< <a class="el" href="../../d1/d34/structshaka_1_1media_1_1SubsampleEntry.html">SubsampleEntry</a> > &subsamples)</td></tr>
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<tr class="separator:aa14b3cd5da5657d8a3d0ecfdf301a184"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Helper class used to read NAL units based on several formats:</p>
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<ul>
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<li>Annex B H.264/h.265</li>
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<li>NAL Unit Stream </li>
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</ul>
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<p>Definition at line <a class="el" href="../../d4/d87/nalu__reader_8h_source.html#l00149">149</a> of file <a class="el" href="../../d4/d87/nalu__reader_8h_source.html">nalu_reader.h</a>.</p>
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</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<a class="anchor" id="a2d1611fe3e60fc6570fe0c21e13911b0"></a>
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<td class="memname">shaka::media::NaluReader::NaluReader </td>
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<td>(</td>
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<td class="paramtype">Nalu::CodecType </td>
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<td class="paramname"><em>type</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint8_t </td>
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<td class="paramname"><em>nal_length_size</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const uint8_t * </td>
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<td class="paramname"><em>stream</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint64_t </td>
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<td class="paramname"><em>stream_size</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">nalu_length_size</td><td>should be set to 0 for AnnexB byte streams; otherwise, it indicates the size of NAL unit length for the NAL unit stream. </td></tr>
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</table>
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</dd>
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</dl>
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<p>Definition at line <a class="el" href="../../d1/df5/nalu__reader_8cc_source.html#l00212">212</a> of file <a class="el" href="../../d1/df5/nalu__reader_8cc_source.html">nalu_reader.cc</a>.</p>
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</div>
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</div>
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<a class="anchor" id="a6890eb05c83bb540af84494ed0590c6b"></a>
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<div class="memitem">
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<div class="memproto">
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<td class="memname">shaka::media::NaluReader::NaluReader </td>
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<td>(</td>
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<td class="paramtype">Nalu::CodecType </td>
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<td class="paramname"><em>type</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint8_t </td>
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<td class="paramname"><em>nal_length_size</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const uint8_t * </td>
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<td class="paramname"><em>stream</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint64_t </td>
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<td class="paramname"><em>stream_size</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const std::vector< <a class="el" href="../../d1/d34/structshaka_1_1media_1_1SubsampleEntry.html">SubsampleEntry</a> > & </td>
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<td class="paramname"><em>subsamples</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">type</td><td>is the codec type of the NALU unit. </td></tr>
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<tr><td class="paramname">nalu_length_size</td><td>should be set to 0 for AnnexB byte streams; otherwise, it indicates the size of NAL unit length for the NAL unit stream. </td></tr>
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<tr><td class="paramname">stream</td><td>is the input stream. </td></tr>
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<tr><td class="paramname">stream_size</td><td>is the size of <em>stream</em>. </td></tr>
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<tr><td class="paramname">subsamples</td><td>specifies the clear and encrypted sections of the <em>stream</em> starting from the beginning of the <em>stream</em>. If <em>subsamples</em> doesn't cover the entire stream, then the rest is assumed to be in the clear. </td></tr>
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</table>
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</dd>
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</dl>
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<p>Definition at line <a class="el" href="../../d1/df5/nalu__reader_8cc_source.html#l00222">222</a> of file <a class="el" href="../../d1/df5/nalu__reader_8cc_source.html">nalu_reader.cc</a>.</p>
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</div>
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</div>
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<h2 class="groupheader">Member Function Documentation</h2>
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<a class="anchor" id="ae051f1f92d84acfcd4cc159d972d647a"></a>
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<div class="memitem">
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<td class="memname">NaluReader::Result shaka::media::NaluReader::Advance </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html">Nalu</a> * </td>
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<td class="paramname"><em>nalu</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Reads a NALU from the stream into |*nalu|, if one exists, and then advances to the next NALU. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">nalu</td><td>contains the NALU read if it exists. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>kOk if a NALU is read; kEOStream if the stream is at the end-of-stream; kInvalidStream on error. </dd></dl>
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<p>Definition at line <a class="el" href="../../d1/df5/nalu__reader_8cc_source.html#l00239">239</a> of file <a class="el" href="../../d1/df5/nalu__reader_8cc_source.html">nalu_reader.cc</a>.</p>
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</div>
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</div>
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<a class="anchor" id="aa14b3cd5da5657d8a3d0ecfdf301a184"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="mlabels">
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<tr>
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<td class="mlabels-left">
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<table class="memname">
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<tr>
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<td class="memname">bool shaka::media::NaluReader::FindStartCodeInClearRange </td>
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<td>(</td>
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<td class="paramtype">const uint8_t * </td>
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<td class="paramname"><em>data</em>, </td>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint64_t </td>
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<td class="paramname"><em>data_size</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint64_t * </td>
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<td class="paramname"><em>offset</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint8_t * </td>
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<td class="paramname"><em>start_code_size</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const std::vector< <a class="el" href="../../d1/d34/structshaka_1_1media_1_1SubsampleEntry.html">SubsampleEntry</a> > & </td>
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<td class="paramname"><em>subsamples</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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</table>
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</div><div class="memdoc">
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<p>Same as FindStartCode() but also specify the subsamples. This searches for start codes in the clear section and will not scan for start codes in the encrypted section. Even if there is a real NALU start code in the encrypted section, this will skip them. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">subsamples</td><td>starting from the start of <em>data</em>. If <em>subsamples</em> does not cover the whole <em>data</em>, the rest is assumed to be in the clear. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>true if it finds a NALU. false otherwise. </dd></dl>
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<p>Definition at line <a class="el" href="../../d1/df5/nalu__reader_8cc_source.html#l00344">344</a> of file <a class="el" href="../../d1/df5/nalu__reader_8cc_source.html">nalu_reader.cc</a>.</p>
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<a class="anchor" id="a9ed9d56a06f43717cdb7035f86075975"></a>
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<div class="memitem">
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<td class="memname">bool shaka::media::NaluReader::StartsWithStartCode </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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</div><div class="memdoc">
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<dl class="section return"><dt>Returns</dt><dd>true if the current position points to a start code. </dd></dl>
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<p>Definition at line <a class="el" href="../../d1/df5/nalu__reader_8cc_source.html#l00297">297</a> of file <a class="el" href="../../d1/df5/nalu__reader_8cc_source.html">nalu_reader.cc</a>.</p>
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</div>
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</div>
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<hr/>The documentation for this class was generated from the following files:<ul>
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<li>packager/media/codecs/<a class="el" href="../../d4/d87/nalu__reader_8h_source.html">nalu_reader.h</a></li>
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<li>packager/media/codecs/<a class="el" href="../../d1/df5/nalu__reader_8cc_source.html">nalu_reader.cc</a></li>
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</ul>
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<img class="footer" src="../../doxygen.png" alt="doxygen"/>
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</a> 1.8.6
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