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<div class="title">avc_decoder_configuration.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 2015 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/filters/avc_decoder_configuration.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/stl_util.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "packager/base/strings/string_number_conversions.h"</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "packager/base/strings/string_util.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "packager/media/base/buffer_reader.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "packager/media/filters/h264_parser.h"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "packager/media/formats/mp4/rcheck.h"</span></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> <span class="keyword">namespace </span>edash_packager {</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span>media {</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"> 19</span> AVCDecoderConfiguration::AVCDecoderConfiguration()</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  : version_(0),</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  profile_indication_(0),</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  profile_compatibility_(0),</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  avc_level_(0),</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  length_size_(0) {}</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> AVCDecoderConfiguration::~AVCDecoderConfiguration() {}</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#a8ac1cb50516b99f6ecafbdcb2705b1cc"> 28</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#a8ac1cb50516b99f6ecafbdcb2705b1cc">AVCDecoderConfiguration::Parse</a>(<span class="keyword">const</span> std::vector<uint8_t>& data) {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <a class="code" href="../../d9/d46/classedash__packager_1_1media_1_1BufferReader.html">BufferReader</a> reader(vector_as_array(&data), data.size());</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  RCHECK(reader.Read1(&version_) && version_ == 1 &&</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  reader.Read1(&profile_indication_) &&</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  reader.Read1(&profile_compatibility_) && reader.Read1(&avc_level_));</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  uint8_t length_size_minus_one;</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  RCHECK(reader.Read1(&length_size_minus_one));</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  length_size_ = (length_size_minus_one & 0x3) + 1;</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  uint8_t num_sps;</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  RCHECK(reader.Read1(&num_sps));</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  num_sps &= 0x1f;</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">if</span> (num_sps < 1) {</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  LOG(ERROR) << <span class="stringliteral">"No SPS found."</span>;</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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> </div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  uint16_t sps_length = 0;</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  RCHECK(reader.Read2(&sps_length));</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="../../d6/da3/classedash__packager_1_1media_1_1H264Parser.html">H264Parser</a> parser;</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">int</span> sps_id = 0;</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  RCHECK(parser.ParseSPSFromArray(reader.data() + reader.pos(), sps_length,</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  &sps_id) == H264Parser::kOk);</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">return</span> ExtractResolutionFromSps(*parser.GetSPS(sps_id), &coded_width_,</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  &coded_height_, &pixel_width_,</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  &pixel_height_);</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// It is unlikely to have more than one SPS in practice. Also there's</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="comment">// no way to change the {coded,pixel}_{width,height} dynamically from</span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// VideoStreamInfo. So skip the rest (if there are any).</span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> }</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#ad03be6192998b36ef2364266e5604c19"> 61</a></span> 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>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <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>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  avc_level_);</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> </div>
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<div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#a88c2e4c0fd4dd99f6a1b02649a6b5831"> 66</a></span> std::string <a class="code" href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#ad03be6192998b36ef2364266e5604c19">AVCDecoderConfiguration::GetCodecString</a>(</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  uint8_t profile_indication,</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  uint8_t profile_compatibility,</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  uint8_t avc_level) {</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">const</span> uint8_t bytes[] = {profile_indication, profile_compatibility,</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  avc_level};</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">return</span> <span class="stringliteral">"avc1."</span> +</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  base::StringToLowerASCII(base::HexEncode(bytes, arraysize(bytes)));</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> }</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="comment">// namespace media</span></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> } <span class="comment">// namespace edash_packager</span></div>
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<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#l00061">avc_decoder_configuration.cc:61</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1H264Parser_html"><div class="ttname"><a href="../../d6/da3/classedash__packager_1_1media_1_1H264Parser.html">edash_packager::media::H264Parser</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d6/d9b/h264__parser_8h_source.html#l00270">h264_parser.h:270</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1AVCDecoderConfiguration_html_a8ac1cb50516b99f6ecafbdcb2705b1cc"><div class="ttname"><a href="../../d6/d49/classedash__packager_1_1media_1_1AVCDecoderConfiguration.html#a8ac1cb50516b99f6ecafbdcb2705b1cc">edash_packager::media::AVCDecoderConfiguration::Parse</a></div><div class="ttdeci">bool Parse(const std::vector< uint8_t > &data)</div><div class="ttdef"><b>Definition:</b> <a href="../../db/d01/avc__decoder__configuration_8cc_source.html#l00028">avc_decoder_configuration.cc:28</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1BufferReader_html"><div class="ttname"><a href="../../d9/d46/classedash__packager_1_1media_1_1BufferReader.html">edash_packager::media::BufferReader</a></div><div class="ttdef"><b>Definition:</b> <a href="../../de/d3e/buffer__reader_8h_source.html#l00022">buffer_reader.h:22</a></div></div>
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