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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">// Copyright 2015 Google Inc. All rights reserved.</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// Use of this source code is governed by a BSD-style</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">// license that can be found in the LICENSE file or at</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment">// https://developers.google.com/open-source/licenses/bsd</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;</div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="preprocessor">#include &quot;packager/media/filters/avc_decoder_configuration.h&quot;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;</div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="preprocessor">#include &quot;packager/base/strings/string_number_conversions.h&quot;</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="preprocessor">#include &quot;packager/base/strings/string_util.h&quot;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#include &quot;packager/media/base/buffer_reader.h&quot;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="preprocessor">#include &quot;packager/media/filters/h264_parser.h&quot;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="preprocessor">#include &quot;packager/media/formats/mp4/rcheck.h&quot;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="keyword">namespace </span>edash_packager {</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="keyword">namespace </span>media {</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;AVCDecoderConfiguration::AVCDecoderConfiguration()</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; : version_(0),</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; profile_indication_(0),</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; profile_compatibility_(0),</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; avc_level_(0) {}</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;AVCDecoderConfiguration::~AVCDecoderConfiguration() {}</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="keywordtype">bool</span> AVCDecoderConfiguration::ParseInternal() {</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <span class="comment">// See ISO 14496-15 sec 5.3.3.1.2</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; BufferReader reader(<a class="code" href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#ae2c11d7dc33c3f90535218797ca6b4d2">data</a>(), <a class="code" href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#a5233b5e870d55f0487ee0387ad69921f">data_size</a>());</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; RCHECK(reader.Read1(&amp;version_) &amp;&amp; version_ == 1 &amp;&amp;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; reader.Read1(&amp;profile_indication_) &amp;&amp;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; reader.Read1(&amp;profile_compatibility_) &amp;&amp; reader.Read1(&amp;avc_level_));</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; uint8_t length_size_minus_one;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; RCHECK(reader.Read1(&amp;length_size_minus_one));</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keywordflow">if</span> ((length_size_minus_one &amp; 0x3) == 2) {</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Invalid NALU length size.&quot;</span>;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; }</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <a class="code" href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#a7f93b527e9c1bd1034f98861ca4f57f7">set_nalu_length_size</a>((length_size_minus_one &amp; 0x3) + 1);</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; uint8_t num_sps;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; RCHECK(reader.Read1(&amp;num_sps));</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; num_sps &amp;= 0x1f;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <span class="keywordflow">if</span> (num_sps &lt; 1) {</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;No SPS found.&quot;</span>;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; }</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keywordflow">for</span> (uint8_t i = 0; i &lt; num_sps; i++) {</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; uint16_t size = 0;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; RCHECK(reader.Read2(&amp;size));</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keyword">const</span> uint8_t* nalu_data = reader.data() + reader.pos();</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; RCHECK(reader.SkipBytes(size));</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; Nalu <a class="code" href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#a7e8ebb71676d606bc8690c3ede399629">nalu</a>;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; RCHECK(nalu.InitializeFromH264(nalu_data, size));</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; RCHECK(nalu.type() == Nalu::H264_SPS);</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <a class="code" href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#a9e094293bce0ea72b2546088f6c250d8">AddNalu</a>(nalu);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="keywordflow">if</span> (i == 0) {</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="comment">// It is unlikely to have more than one SPS in practice. Also there&#39;s</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="comment">// no way to change the {coded,pixel}_{width,height} dynamically from</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="comment">// VideoStreamInfo.</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keywordtype">int</span> sps_id = 0;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; H264Parser parser;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; RCHECK(parser.ParseSps(nalu, &amp;sps_id) == H264Parser::kOk);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; RCHECK(ExtractResolutionFromSps(*parser.GetSps(sps_id), &amp;coded_width_,</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; &amp;coded_height_, &amp;pixel_width_,</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; &amp;pixel_height_));</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; }</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; }</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; uint8_t pps_count;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; RCHECK(reader.Read1(&amp;pps_count));</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="keywordflow">for</span> (uint8_t i = 0; i &lt; pps_count; i++) {</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; uint16_t size = 0;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; RCHECK(reader.Read2(&amp;size));</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keyword">const</span> uint8_t* nalu_data = reader.data() + reader.pos();</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; RCHECK(reader.SkipBytes(size));</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; Nalu <a class="code" href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#a7e8ebb71676d606bc8690c3ede399629">nalu</a>;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; RCHECK(nalu.InitializeFromH264(nalu_data, size));</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; RCHECK(nalu.type() == Nalu::H264_PPS);</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <a class="code" href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#a9e094293bce0ea72b2546088f6c250d8">AddNalu</a>(nalu);</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; }</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;}</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;</div>
<div class="line"><a name="l00091"></a><span class="lineno"><a class="line" href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#ad03be6192998b36ef2364266e5604c19"> 91</a></span>&#160;std::string <a class="code" href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#ad03be6192998b36ef2364266e5604c19">AVCDecoderConfiguration::GetCodecString</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keywordflow">return</span> <a class="code" href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#ad03be6192998b36ef2364266e5604c19">GetCodecString</a>(profile_indication_, profile_compatibility_,</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; avc_level_);</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;}</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;</div>
<div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#a88c2e4c0fd4dd99f6a1b02649a6b5831"> 96</a></span>&#160;std::string <a class="code" href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#ad03be6192998b36ef2364266e5604c19">AVCDecoderConfiguration::GetCodecString</a>(</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; uint8_t profile_indication,</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; uint8_t profile_compatibility,</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; uint8_t avc_level) {</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <span class="keyword">const</span> uint8_t bytes[] = {profile_indication, profile_compatibility,</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; avc_level};</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="keywordflow">return</span> <span class="stringliteral">&quot;avc1.&quot;</span> +</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; base::StringToLowerASCII(base::HexEncode(bytes, arraysize(bytes)));</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;}</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;} <span class="comment">// namespace media</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;} <span class="comment">// namespace edash_packager</span></div>
<div class="ttc" id="classedash__packager_1_1media_1_1AVCDecoderConfiguration_html_ad03be6192998b36ef2364266e5604c19"><div class="ttname"><a href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#ad03be6192998b36ef2364266e5604c19">edash_packager::media::AVCDecoderConfiguration::GetCodecString</a></div><div class="ttdeci">std::string GetCodecString() const </div><div class="ttdef"><b>Definition:</b> <a href="../../db/d01/avc__decoder__configuration_8cc_source.html#l00091">avc_decoder_configuration.cc:91</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1DecoderConfiguration_html_a7e8ebb71676d606bc8690c3ede399629"><div class="ttname"><a href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#a7e8ebb71676d606bc8690c3ede399629">edash_packager::media::DecoderConfiguration::nalu</a></div><div class="ttdeci">const Nalu &amp; nalu(size_t i) const </div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d09/decoder__configuration_8h_source.html#l00044">decoder_configuration.h:44</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1DecoderConfiguration_html_ae2c11d7dc33c3f90535218797ca6b4d2"><div class="ttname"><a href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#ae2c11d7dc33c3f90535218797ca6b4d2">edash_packager::media::DecoderConfiguration::data</a></div><div class="ttdeci">const uint8_t * data() const </div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d09/decoder__configuration_8h_source.html#l00053">decoder_configuration.h:53</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1DecoderConfiguration_html_a9e094293bce0ea72b2546088f6c250d8"><div class="ttname"><a href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#a9e094293bce0ea72b2546088f6c250d8">edash_packager::media::DecoderConfiguration::AddNalu</a></div><div class="ttdeci">void AddNalu(const Nalu &amp;nalu)</div><div class="ttdoc">Adds the given Nalu to the configuration. </div><div class="ttdef"><b>Definition:</b> <a href="../../da/d2c/decoder__configuration_8cc_source.html#l00021">decoder_configuration.cc:21</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1DecoderConfiguration_html_a5233b5e870d55f0487ee0387ad69921f"><div class="ttname"><a href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#a5233b5e870d55f0487ee0387ad69921f">edash_packager::media::DecoderConfiguration::data_size</a></div><div class="ttdeci">size_t data_size() const </div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d09/decoder__configuration_8h_source.html#l00056">decoder_configuration.h:56</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1DecoderConfiguration_html_a7f93b527e9c1bd1034f98861ca4f57f7"><div class="ttname"><a href="../../d8/dfb/classedash__packager_1_1media_1_1DecoderConfiguration.html#a7f93b527e9c1bd1034f98861ca4f57f7">edash_packager::media::DecoderConfiguration::set_nalu_length_size</a></div><div class="ttdeci">void set_nalu_length_size(uint8_t nalu_length_size)</div><div class="ttdoc">Sets the size of the NAL unit length field. </div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d09/decoder__configuration_8h_source.html#l00059">decoder_configuration.h:59</a></div></div>
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