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<li class="navelem"><a class="el" href="../../dir_3f8eec2fc361645de4b1ec14c19fffc7.html">packager</a></li><li class="navelem"><a class="el" href="../../dir_f99dae54fe7170f791f339b952d5067a.html">media</a></li><li class="navelem"><a class="el" href="../../dir_e3bda0bde998a4d5063328245b9909be.html">base</a></li> </ul>
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<div class="title">bit_writer.cc</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2017 Google Inc. All rights reserved.</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Use of this source code is governed by a BSD-style</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// license that can be found in the LICENSE file or at</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// https://developers.google.com/open-source/licenses/bsd</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "packager/media/base/bit_writer.h"</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  </div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="keyword">namespace </span><a class="code" href="../../d8/daf/namespaceshaka.html">shaka</a> {</div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  </div>
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<div class="line"><a name="l00012"></a><span class="lineno"><a class="line" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#a09495a53bd1f1885dcc328b1621041f4"> 12</a></span> <a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#a09495a53bd1f1885dcc328b1621041f4">BitWriter::BitWriter</a>(std::vector<uint8_t>* storage)</div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  : storage_(storage), initial_storage_size_(storage_->size()) {}</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  </div>
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<div class="line"><a name="l00015"></a><span class="lineno"><a class="line" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1"> 15</a></span> <span class="keywordtype">void</span> <a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1">BitWriter::WriteBits</a>(uint32_t bits, <span class="keywordtype">size_t</span> number_of_bits) {</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  DCHECK_NE(number_of_bits, 0u);</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  DCHECK_LE(number_of_bits, 32u);</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  DCHECK_LT(bits, 1ULL << number_of_bits);</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  num_bits_ += number_of_bits;</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  DCHECK_LE(num_bits_, 64);</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  bits_ |= <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(bits) << (64 - num_bits_);</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  </div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keywordflow">while</span> (num_bits_ >= 8) {</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  storage_->push_back(bits_ >> 56);</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  bits_ <<= 8;</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  num_bits_ -= 8;</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  }</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> }</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  </div>
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<div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#a1c14f04a0bb3090edb3ac0fffa346bc1"> 31</a></span> <span class="keywordtype">void</span> <a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#a1c14f04a0bb3090edb3ac0fffa346bc1">BitWriter::Flush</a>() {</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordflow">while</span> (num_bits_ > 0) {</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  storage_->push_back(bits_ >> 56);</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  bits_ <<= 8;</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  num_bits_ -= 8;</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  }</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  bits_ = 0;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  num_bits_ = 0;</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> }</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> } <span class="comment">// namespace shaka</span></div>
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</div><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="anamespaceshaka_html"><div class="ttname"><a href="../../d8/daf/namespaceshaka.html">shaka</a></div><div class="ttdoc">All the methods that are virtual are virtual for mocking.</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d15/gflags__hex__bytes_8cc_source.html#l00011">gflags_hex_bytes.cc:11</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1BitWriter_html_aee5f905e55f262e38f5df506611663f1"><div class="ttname"><a href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1">shaka::media::BitWriter::WriteBits</a></div><div class="ttdeci">void WriteBits(uint32_t bits, size_t number_of_bits)</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d58/bit__writer_8cc_source.html#l00015">bit_writer.cc:15</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1BitWriter_html_a1c14f04a0bb3090edb3ac0fffa346bc1"><div class="ttname"><a href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#a1c14f04a0bb3090edb3ac0fffa346bc1">shaka::media::BitWriter::Flush</a></div><div class="ttdeci">void Flush()</div><div class="ttdoc">Write pending bits, and align bitstream with extra zero bits.</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d58/bit__writer_8cc_source.html#l00031">bit_writer.cc:31</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1BitWriter_html_a09495a53bd1f1885dcc328b1621041f4"><div class="ttname"><a href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#a09495a53bd1f1885dcc328b1621041f4">shaka::media::BitWriter::BitWriter</a></div><div class="ttdeci">BitWriter(std::vector< uint8_t > *storage)</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d58/bit__writer_8cc_source.html#l00012">bit_writer.cc:12</a></div></div>
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