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<li class="navelem"><a class="el" href="../../dir_39dc0668bd5a501998f94e8b4e546c71.html">media</a></li><li class="navelem"><a class="el" href="../../dir_65f7acfa8cf3a5f1edc11faa2428b914.html">formats</a></li><li class="navelem"><a class="el" href="../../dir_3e9291fd7a18fdecc763294cb2628910.html">mp4</a></li> </ul>
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<div class="title">box.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 2014 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/formats/mp4/box.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="preprocessor">#include "packager/base/logging.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "packager/media/formats/mp4/box_buffer.h"</span></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"> 12</span> <span class="keyword">namespace </span>edash_packager {</div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">namespace </span>mp4 {</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> Box::Box() : atom_size(0) {}</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> Box::~Box() {}</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div>
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<div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#a7b62a3983faafbea54a32486df60ed96"> 19</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#a7b62a3983faafbea54a32486df60ed96">Box::Parse</a>(<a class="code" href="../../db/d6c/classedash__packager_1_1media_1_1mp4_1_1BoxReader.html">BoxReader</a>* reader) {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  DCHECK(reader != NULL);</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <a class="code" href="../../dd/d4f/classedash__packager_1_1media_1_1mp4_1_1BoxBuffer.html">BoxBuffer</a> buffer(reader);</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="keywordflow">return</span> <a class="code" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#ab588f893676e2c817088fc01caa7b135">ReadWrite</a>(&buffer);</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> </div>
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<div class="line"><a name="l00025"></a><span class="lineno"><a class="line" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#aa7a756828b5514fcd3eaf16d86c413c0"> 25</a></span> <span class="keywordtype">void</span> <a class="code" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#aa7a756828b5514fcd3eaf16d86c413c0">Box::Write</a>(<a class="code" href="../../df/dde/classedash__packager_1_1media_1_1BufferWriter.html">BufferWriter</a>* writer) {</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  DCHECK(writer != NULL);</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  uint32_t size = <a class="code" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#a308081198b1fa9f9e4653ad976014a16">ComputeSize</a>();</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  DCHECK_EQ(size, this-><a class="code" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#a767571cecbc37bedb05d1ea84716a005">atom_size</a>);</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>  <span class="keywordtype">size_t</span> buffer_size_before_write = writer->Size();</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <a class="code" href="../../dd/d4f/classedash__packager_1_1media_1_1mp4_1_1BoxBuffer.html">BoxBuffer</a> buffer(writer);</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  CHECK(<a class="code" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#ab588f893676e2c817088fc01caa7b135">ReadWrite</a>(&buffer));</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  DCHECK_EQ(this-><a class="code" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#a767571cecbc37bedb05d1ea84716a005">atom_size</a>, writer->Size() - buffer_size_before_write);</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> }</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div>
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<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#ab588f893676e2c817088fc01caa7b135"> 36</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#ab588f893676e2c817088fc01caa7b135">Box::ReadWrite</a>(<a class="code" href="../../dd/d4f/classedash__packager_1_1media_1_1mp4_1_1BoxBuffer.html">BoxBuffer</a>* buffer) {</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">if</span> (buffer-><a class="code" href="../../dd/d4f/classedash__packager_1_1media_1_1mp4_1_1BoxBuffer.html#a36c0d8448dab759db37f9581ea602807">Reading</a>()) {</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="comment">// Skip for read mode, which is handled already in BoxReader.</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  CHECK(buffer->ReadWriteUInt32(&this->atom_size));</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  FourCC fourcc = BoxType();</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  CHECK(buffer->ReadWriteFourCC(&fourcc));</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  }</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> }</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> FullBox::FullBox() : version(0), flags(0) {}</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> FullBox::~FullBox() {}</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div>
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<div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="../../d6/d8f/structedash__packager_1_1media_1_1mp4_1_1FullBox.html#a870af62c176dfafa79cde0b1a8a55698"> 50</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../d6/d8f/structedash__packager_1_1media_1_1mp4_1_1FullBox.html#a870af62c176dfafa79cde0b1a8a55698">FullBox::ReadWrite</a>(<a class="code" href="../../dd/d4f/classedash__packager_1_1media_1_1mp4_1_1BoxBuffer.html">BoxBuffer</a>* buffer) {</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  RCHECK(<a class="code" href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#ab588f893676e2c817088fc01caa7b135">Box::ReadWrite</a>(buffer));</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  uint32_t vflags;</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">if</span> (buffer-><a class="code" href="../../dd/d4f/classedash__packager_1_1media_1_1mp4_1_1BoxBuffer.html#a36c0d8448dab759db37f9581ea602807">Reading</a>()) {</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  RCHECK(buffer->ReadWriteUInt32(&vflags));</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  this->version = vflags >> 24;</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  this->flags = vflags & 0x00FFFFFF;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  vflags = (this->version << 24) | this->flags;</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  RCHECK(buffer->ReadWriteUInt32(&vflags));</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  }</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> }</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> } <span class="comment">// namespace mp4</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> } <span class="comment">// namespace edash_packager</span></div>
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<div class="ttc" id="structedash__packager_1_1media_1_1mp4_1_1Box_html_ab588f893676e2c817088fc01caa7b135"><div class="ttname"><a href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#ab588f893676e2c817088fc01caa7b135">edash_packager::media::mp4::Box::ReadWrite</a></div><div class="ttdeci">virtual bool ReadWrite(BoxBuffer *buffer)</div><div class="ttdoc">Read/write the mp4 box from/to BoxBuffer. </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d4d/box_8cc_source.html#l00036">box.cc:36</a></div></div>
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<div class="ttc" id="structedash__packager_1_1media_1_1mp4_1_1Box_html_a308081198b1fa9f9e4653ad976014a16"><div class="ttname"><a href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#a308081198b1fa9f9e4653ad976014a16">edash_packager::media::mp4::Box::ComputeSize</a></div><div class="ttdeci">virtual uint32_t ComputeSize()=0</div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1mp4_1_1BoxBuffer_html"><div class="ttname"><a href="../../dd/d4f/classedash__packager_1_1media_1_1mp4_1_1BoxBuffer.html">edash_packager::media::mp4::BoxBuffer</a></div><div class="ttdef"><b>Definition:</b> <a href="../../dc/dbf/box__buffer_8h_source.html#l00023">box_buffer.h:23</a></div></div>
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<div class="ttc" id="structedash__packager_1_1media_1_1mp4_1_1FullBox_html_a870af62c176dfafa79cde0b1a8a55698"><div class="ttname"><a href="../../d6/d8f/structedash__packager_1_1media_1_1mp4_1_1FullBox.html#a870af62c176dfafa79cde0b1a8a55698">edash_packager::media::mp4::FullBox::ReadWrite</a></div><div class="ttdeci">bool ReadWrite(BoxBuffer *buffer) override</div><div class="ttdoc">Read/write the mp4 box from/to BoxBuffer. </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d4d/box_8cc_source.html#l00050">box.cc:50</a></div></div>
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<div class="ttc" id="structedash__packager_1_1media_1_1mp4_1_1Box_html_a7b62a3983faafbea54a32486df60ed96"><div class="ttname"><a href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#a7b62a3983faafbea54a32486df60ed96">edash_packager::media::mp4::Box::Parse</a></div><div class="ttdeci">bool Parse(BoxReader *reader)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d4d/box_8cc_source.html#l00019">box.cc:19</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1mp4_1_1BoxBuffer_html_a36c0d8448dab759db37f9581ea602807"><div class="ttname"><a href="../../dd/d4f/classedash__packager_1_1media_1_1mp4_1_1BoxBuffer.html#a36c0d8448dab759db37f9581ea602807">edash_packager::media::mp4::BoxBuffer::Reading</a></div><div class="ttdeci">bool Reading() const </div><div class="ttdef"><b>Definition:</b> <a href="../../dc/dbf/box__buffer_8h_source.html#l00038">box_buffer.h:38</a></div></div>
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<div class="ttc" id="structedash__packager_1_1media_1_1mp4_1_1Box_html_aa7a756828b5514fcd3eaf16d86c413c0"><div class="ttname"><a href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#aa7a756828b5514fcd3eaf16d86c413c0">edash_packager::media::mp4::Box::Write</a></div><div class="ttdeci">void Write(BufferWriter *writer)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d4d/box_8cc_source.html#l00025">box.cc:25</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1mp4_1_1BoxReader_html"><div class="ttname"><a href="../../db/d6c/classedash__packager_1_1media_1_1mp4_1_1BoxReader.html">edash_packager::media::mp4::BoxReader</a></div><div class="ttdoc">Class for reading MP4 boxes. </div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d92/box__reader_8h_source.html#l00024">box_reader.h:24</a></div></div>
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<div class="ttc" id="structedash__packager_1_1media_1_1mp4_1_1Box_html_a767571cecbc37bedb05d1ea84716a005"><div class="ttname"><a href="../../d7/d8a/structedash__packager_1_1media_1_1mp4_1_1Box.html#a767571cecbc37bedb05d1ea84716a005">edash_packager::media::mp4::Box::atom_size</a></div><div class="ttdeci">uint32_t atom_size</div><div class="ttdef"><b>Definition:</b> <a href="../../dc/d19/box_8h_source.html#l00052">box.h:52</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1BufferWriter_html"><div class="ttname"><a href="../../df/dde/classedash__packager_1_1media_1_1BufferWriter.html">edash_packager::media::BufferWriter</a></div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dd2/buffer__writer_8h_source.html#l00022">buffer_writer.h:22</a></div></div>
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