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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_64597db6ac7a9160e951a4226a03f10e.html">codecs</a></li> </ul>
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<div class="title">es_descriptor.cc</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright (c) 2012 The Chromium Authors. All rights reserved.</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Use of this source code is governed by a BSD-style license that can be</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// found in the LICENSE file.</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>  </div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include "packager/media/codecs/es_descriptor.h"</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_reader.h"</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include "packager/media/base/buffer_writer.h"</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "packager/media/base/rcheck.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  </div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</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="l00012"></a><span class="lineno"> 12</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">namespace </span>{</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"> 15</span> <span class="comment">// ISO/IEC 14496-1:2004 Section 7.2.6.6 Table 6: StreamType values.</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">enum</span> StreamType {</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  kForbiddenStreamType = 0x00,</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  kObjectDescriptorStreamType = 0x01,</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  kClockReferenceStreamType = 0x02,</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  kSceneDescriptionStreamType = 0x03,</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  kVisualStreamType = 0x04,</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  kAudioStreamType = 0x05,</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  kMPEG7StreamType = 0x06,</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  kIPMPStreamType = 0x07,</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  kObjectContentInfoStreamType = 0x08,</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  kMPEGJStreamType = 0x09,</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  kInteractionStream = 0x0A,</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  kIPMPToolStreamType = 0x0B,</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"> 31</span> <span class="comment">// ISO/IEC 14496-1:2004 Section 7.3.2.3 Table 12: ISO SL Config Descriptor.</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">enum</span> SLPredefinedTags {</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  kSLPredefinedNull = 0x01,</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  kSLPredefinedMP4 = 0x02,</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"> 36</span>  </div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">// The elementary stream size is specific by up to 4 bytes.</span></div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">// The MSB of a byte indicates if there are more bytes for the size.</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keywordtype">bool</span> ReadDescriptorSize(BitReader* reader, <span class="keywordtype">size_t</span>* size) {</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  uint8_t msb;</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  uint8_t byte;</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  </div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  *size = 0;</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < 4; ++i) {</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  RCHECK(reader->ReadBits(1, &msb));</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  RCHECK(reader->ReadBits(7, &<span class="keywordtype">byte</span>));</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  *size = (*size << 7) + <span class="keywordtype">byte</span>;</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"> 50</span>  <span class="keywordflow">if</span> (msb == 0)</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">break</span>;</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>  </div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> }</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="keywordtype">void</span> WriteDescriptorSize(<span class="keywordtype">size_t</span> size, BufferWriter* writer) {</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  std::vector<uint8_t> size_bytes;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">while</span> (size > 0) {</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  uint8_t <span class="keywordtype">byte</span> = (size & 0x7F);</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  size >>= 7;</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">if</span> (!size_bytes.empty())</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordtype">byte</span> |= 0x80;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  size_bytes.push_back(<span class="keywordtype">byte</span>);</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  }</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> iter = size_bytes.rbegin(); iter != size_bytes.rend(); iter++)</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  writer->AppendInt(*iter);</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> }</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="keywordtype">size_t</span> CountDescriptorSize(<span class="keywordtype">size_t</span> size) {</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordtype">size_t</span> num_bytes = 0;</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">while</span> (size > 0) {</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  num_bytes++;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  size >>= 7;</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  }</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">return</span> num_bytes;</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> }</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  </div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> } <span class="comment">// namespace</span></div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div>
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<div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a521cd928cf32e26701536e659917c970"> 81</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a521cd928cf32e26701536e659917c970">BaseDescriptor::Parse</a>(<span class="keyword">const</span> std::vector<uint8_t>& data) {</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html">BitReader</a> reader(data.data(), data.size());</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">return</span> <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aa2d2dcf924e531e0ce11194eac3cb497">Read</a>(&reader);</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> }</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  </div>
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<div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aa2d2dcf924e531e0ce11194eac3cb497"> 86</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aa2d2dcf924e531e0ce11194eac3cb497">BaseDescriptor::Read</a>(<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html">BitReader</a>* reader) {</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  uint8_t tag;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  RCHECK(reader-><a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">ReadBits</a>(8, &tag));</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">if</span> (tag != <span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(tag_)) {</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  LOG(ERROR) << <span class="stringliteral">"Expecting tag "</span> << <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(tag_) << <span class="stringliteral">", but seeing "</span></div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  << <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(tag);</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  RCHECK(ReadDescriptorSize(reader, &data_size_));</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">return</span> ReadData(reader);</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> }</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  </div>
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<div class="line"><a name="l00098"></a><span class="lineno"><a class="line" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aaf6147c9fe6648e04fba0993c8006e6b"> 98</a></span> <span class="keywordtype">void</span> <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aaf6147c9fe6648e04fba0993c8006e6b">BaseDescriptor::Write</a>(<a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html">BufferWriter</a>* writer) {</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">// Compute and update descriptor size.</span></div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordtype">size_t</span> size = <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a2ba53752e5146af951e378998fc076a3">ComputeSize</a>();</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordtype">size_t</span> buffer_size_before_write = writer->Size();</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  </div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  WriteInternal(writer);</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  </div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  DCHECK_EQ(size, writer->Size() - buffer_size_before_write);</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> }</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  </div>
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<div class="line"><a name="l00108"></a><span class="lineno"><a class="line" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a2ba53752e5146af951e378998fc076a3"> 108</a></span> <span class="keywordtype">size_t</span> <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a2ba53752e5146af951e378998fc076a3">BaseDescriptor::ComputeSize</a>() {</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  data_size_ = ComputeDataSize();</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">return</span> 1 + CountDescriptorSize(data_size_) + data_size_;</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> }</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
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<div class="line"><a name="l00113"></a><span class="lineno"><a class="line" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a7d0d63d60398a6bb2c0d738f1b6a4283"> 113</a></span> <span class="keywordtype">void</span> <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a7d0d63d60398a6bb2c0d738f1b6a4283">BaseDescriptor::WriteHeader</a>(<a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html">BufferWriter</a>* writer) {</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  writer-><a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f">AppendInt</a>(<span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(tag_));</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  WriteDescriptorSize(data_size_, writer);</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> }</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  </div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="keywordtype">bool</span> DecoderSpecificInfoDescriptor::ReadData(<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html">BitReader</a>* reader) {</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  data_.resize(<a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#ae953afe76a6b5c65260c89949dd87ba2">data_size</a>());</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">for</span> (uint8_t& data_entry : data_)</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  RCHECK(reader-><a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">ReadBits</a>(8, &data_entry));</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> }</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  </div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="keywordtype">void</span> DecoderSpecificInfoDescriptor::WriteInternal(BufferWriter* writer) {</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a7d0d63d60398a6bb2c0d738f1b6a4283">WriteHeader</a>(writer);</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  writer->AppendVector(data_);</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> }</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  </div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="keywordtype">size_t</span> DecoderSpecificInfoDescriptor::ComputeDataSize() {</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">return</span> data_.size();</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> }</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  </div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="keywordtype">bool</span> DecoderConfigDescriptor::ReadData(BitReader* reader) {</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> start_pos = reader->bit_position();</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  RCHECK(reader->ReadBits(8, &object_type_));</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  </div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordtype">int</span> stream_type;</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  RCHECK(reader->ReadBits(6, &stream_type));</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordflow">if</span> (stream_type != kAudioStreamType) {</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  LOG(ERROR) << <span class="stringliteral">"Seeing non audio stream type "</span> << stream_type;</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  }</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  </div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  RCHECK(reader->SkipBits(2)); <span class="comment">// Skip |upStream| and |reserved|.</span></div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  RCHECK(reader->ReadBits(24, &buffer_size_db_));</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  RCHECK(reader->ReadBits(32, &max_bitrate_));</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  RCHECK(reader->ReadBits(32, &avg_bitrate_));</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> fields_bits = reader->bit_position() - start_pos;</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  </div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> kBitsInByte = 8;</div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_child_tags = <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#ae953afe76a6b5c65260c89949dd87ba2">data_size</a>() * kBitsInByte > fields_bits;</div>
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|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  decoder_specific_info_descriptor_ = DecoderSpecificInfoDescriptor();</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">if</span> (has_child_tags)</div>
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|
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  RCHECK(decoder_specific_info_descriptor_.<a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aa2d2dcf924e531e0ce11194eac3cb497">Read</a>(reader));</div>
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|
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  </div>
|
|
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> }</div>
|
|
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  </div>
|
|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="keywordtype">void</span> DecoderConfigDescriptor::WriteInternal(BufferWriter* writer) {</div>
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|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a7d0d63d60398a6bb2c0d738f1b6a4283">WriteHeader</a>(writer);</div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  </div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  writer->AppendInt(<span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(object_type_));</div>
|
|
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="comment">// 6 bit stream type. The last bit is reserved with 1.</span></div>
|
|
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keyword">const</span> uint8_t stream_type = (kAudioStreamType << 2) | 1;</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  writer->AppendInt(stream_type);</div>
|
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  writer->AppendNBytes(buffer_size_db_, 3);</div>
|
|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  writer->AppendInt(max_bitrate_);</div>
|
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  writer->AppendInt(avg_bitrate_);</div>
|
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  </div>
|
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">if</span> (!decoder_specific_info_descriptor_.data().empty())</div>
|
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  decoder_specific_info_descriptor_.<a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aaf6147c9fe6648e04fba0993c8006e6b">Write</a>(writer);</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> }</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  </div>
|
|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="keywordtype">size_t</span> DecoderConfigDescriptor::ComputeDataSize() {</div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="comment">// object_type (1 byte), stream_type (1 byte), decoding_buffer_size (3 bytes),</span></div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="comment">// max_bitrate (4 bytes), avg_bitrate (4 bytes).</span></div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> data_size_without_children = 1 + 1 + 3 + 4 + 4;</div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">if</span> (decoder_specific_info_descriptor_.data().empty())</div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">return</span> data_size_without_children;</div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">return</span> data_size_without_children +</div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  decoder_specific_info_descriptor_.<a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a2ba53752e5146af951e378998fc076a3">ComputeSize</a>();</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> }</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  </div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="keywordtype">bool</span> SLConfigDescriptor::ReadData(BitReader* reader) {</div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> }</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  </div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="keywordtype">void</span> SLConfigDescriptor::WriteInternal(BufferWriter* writer) {</div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a7d0d63d60398a6bb2c0d738f1b6a4283">WriteHeader</a>(writer);</div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  writer->AppendInt(<span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(kSLPredefinedMP4));</div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> }</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  </div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="keywordtype">size_t</span> SLConfigDescriptor::ComputeDataSize() {</div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordflow">return</span> 1;</div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> }</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  </div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="keywordtype">bool</span> ESDescriptor::ReadData(BitReader* reader) {</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordtype">bool</span> stream_dependency_flag;</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordtype">bool</span> url_flag;</div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordtype">bool</span> ocr_stream_flag;</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  RCHECK(reader->ReadBits(16, &esid_));</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  RCHECK(reader->ReadBits(1, &stream_dependency_flag));</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  RCHECK(reader->ReadBits(1, &url_flag));</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  RCHECK(!url_flag); <span class="comment">// We don't support url flag</span></div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  RCHECK(reader->ReadBits(1, &ocr_stream_flag));</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  RCHECK(reader->SkipBits(5)); <span class="comment">// streamPriority</span></div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  </div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">if</span> (stream_dependency_flag)</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  RCHECK(reader->SkipBits(16)); <span class="comment">// dependsOn_ES_ID</span></div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">if</span> (ocr_stream_flag)</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  RCHECK(reader->SkipBits(16)); <span class="comment">// OCR_ES_Id</span></div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  </div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">return</span> decoder_config_descriptor_.<a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aa2d2dcf924e531e0ce11194eac3cb497">Read</a>(reader);</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="comment">// Skip the parsing of |sl_config_descriptor_| intentionally as we do not care</span></div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="comment">// about the data.</span></div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> }</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  </div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="keywordtype">void</span> ESDescriptor::WriteInternal(BufferWriter* writer) {</div>
|
|
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a7d0d63d60398a6bb2c0d738f1b6a4283">WriteHeader</a>(writer);</div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  </div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="comment">// According to ISO/IEC 14496-14:2018 Section 4.1.2, </span></div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="comment">// ES_ID is set to 0 when stored</span></div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keyword">const</span> uint16_t kEsid = 0;</div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  writer->AppendInt(kEsid);</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keyword">const</span> uint8_t kNoEsFlags = 0;</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  writer->AppendInt(kNoEsFlags);</div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  </div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  decoder_config_descriptor_.<a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aaf6147c9fe6648e04fba0993c8006e6b">Write</a>(writer);</div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  sl_config_descriptor_.<a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aaf6147c9fe6648e04fba0993c8006e6b">Write</a>(writer);</div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> }</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  </div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="keywordtype">size_t</span> ESDescriptor::ComputeDataSize() {</div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="comment">// esid (2 bytes), es_flags (1 byte).</span></div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> data_size_without_children = 2 + 1;</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">return</span> data_size_without_children + decoder_config_descriptor_.<a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a2ba53752e5146af951e378998fc076a3">ComputeSize</a>() +</div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  sl_config_descriptor_.<a class="code" href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a2ba53752e5146af951e378998fc076a3">ComputeSize</a>();</div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> }</div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  </div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> } <span class="comment">// namespace media</span></div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> } <span class="comment">// namespace shaka</span></div>
|
|
</div><!-- fragment --></div><!-- contents -->
|
|
<div class="ttc" id="aclassshaka_1_1media_1_1BufferWriter_html"><div class="ttname"><a href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html">shaka::media::BufferWriter</a></div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dd2/buffer__writer_8h_source.html#l00023">buffer_writer.h:23</a></div></div>
|
|
<div class="ttc" id="aclassshaka_1_1media_1_1BitReader_html_ae40382c4ca4a57b3bb3531a337aebbe4"><div class="ttname"><a href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">shaka::media::BitReader::ReadBits</a></div><div class="ttdeci">bool ReadBits(size_t num_bits, T *out)</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/dd3/bit__reader_8h_source.html#l00035">bit_reader.h:35</a></div></div>
|
|
<div class="ttc" id="aclassshaka_1_1media_1_1BaseDescriptor_html_aa2d2dcf924e531e0ce11194eac3cb497"><div class="ttname"><a href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aa2d2dcf924e531e0ce11194eac3cb497">shaka::media::BaseDescriptor::Read</a></div><div class="ttdeci">bool Read(BitReader *reader)</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/es__descriptor_8cc_source.html#l00086">es_descriptor.cc:86</a></div></div>
|
|
<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>
|
|
<div class="ttc" id="aclassshaka_1_1media_1_1BitReader_html"><div class="ttname"><a href="../../d6/da9/classshaka_1_1media_1_1BitReader.html">shaka::media::BitReader</a></div><div class="ttdoc">A class to read bit streams.</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/dd3/bit__reader_8h_source.html#l00017">bit_reader.h:17</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1BufferWriter_html_abd8854feedd8b45146eb04dacf7d5b2f"><div class="ttname"><a href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f">shaka::media::BufferWriter::AppendInt</a></div><div class="ttdeci">void AppendInt(uint8_t v)</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dd3/buffer__writer_8cc_source.html#l00025">buffer_writer.cc:25</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1BaseDescriptor_html_a521cd928cf32e26701536e659917c970"><div class="ttname"><a href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a521cd928cf32e26701536e659917c970">shaka::media::BaseDescriptor::Parse</a></div><div class="ttdeci">bool Parse(const std::vector< uint8_t > &data)</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/es__descriptor_8cc_source.html#l00081">es_descriptor.cc:81</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1BaseDescriptor_html_a7d0d63d60398a6bb2c0d738f1b6a4283"><div class="ttname"><a href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a7d0d63d60398a6bb2c0d738f1b6a4283">shaka::media::BaseDescriptor::WriteHeader</a></div><div class="ttdeci">void WriteHeader(BufferWriter *writer)</div><div class="ttdoc">Write descriptor header.</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/es__descriptor_8cc_source.html#l00113">es_descriptor.cc:113</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1BaseDescriptor_html_a2ba53752e5146af951e378998fc076a3"><div class="ttname"><a href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#a2ba53752e5146af951e378998fc076a3">shaka::media::BaseDescriptor::ComputeSize</a></div><div class="ttdeci">size_t ComputeSize()</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/es__descriptor_8cc_source.html#l00108">es_descriptor.cc:108</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1BaseDescriptor_html_ae953afe76a6b5c65260c89949dd87ba2"><div class="ttname"><a href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#ae953afe76a6b5c65260c89949dd87ba2">shaka::media::BaseDescriptor::data_size</a></div><div class="ttdeci">size_t data_size() const</div><div class="ttdef"><b>Definition:</b> <a href="../../da/dcb/es__descriptor_8h_source.html#l00070">es_descriptor.h:70</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1BaseDescriptor_html_aaf6147c9fe6648e04fba0993c8006e6b"><div class="ttname"><a href="../../df/db9/classshaka_1_1media_1_1BaseDescriptor.html#aaf6147c9fe6648e04fba0993c8006e6b">shaka::media::BaseDescriptor::Write</a></div><div class="ttdeci">void Write(BufferWriter *writer)</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/es__descriptor_8cc_source.html#l00098">es_descriptor.cc:98</a></div></div>
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