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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_375ba2cfd8fd5b05c50b92d996b9d386.html">formats</a></li><li class="navelem"><a class="el" href="../../dir_b23f8e22c8c095d1c8c0cb8f88104a00.html">webm</a></li> </ul>
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<div class="title">webm_media_parser.h</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 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">#ifndef PACKAGER_MEDIA_FORMATS_WEBM_WEBM_MEDIA_PARSER_H_</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#define PACKAGER_MEDIA_FORMATS_WEBM_WEBM_MEDIA_PARSER_H_</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  </div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include "packager/base/callback_forward.h"</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "packager/base/compiler_specific.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/base/byte_queue.h"</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "packager/media/base/media_parser.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  </div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</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="l00014"></a><span class="lineno"> 14</span> <span class="keyword">namespace </span>media {</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">class </span>WebMClusterParser;</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  </div>
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<div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html"> 18</a></span> <span class="keyword">class </span><a class="code" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html">WebMMediaParser</a> : <span class="keyword">public</span> <a class="code" href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html">MediaParser</a> {</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <a class="code" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html">WebMMediaParser</a>();</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  ~<a class="code" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html">WebMMediaParser</a>() <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  </div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keywordtype">void</span> <a class="code" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#ac66eb6507aef7995a3dcb02967e1cb8b">Init</a>(<span class="keyword">const</span> <a class="code" href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#aef5795d2b3df2526c6e8afe1e4d072bf">InitCB</a>& init_cb,</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">const</span> <a class="code" href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#ad86528c837c0a773f7e853c38a4a3af2">NewMediaSampleCB</a>& new_media_sample_cb,</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keyword">const</span> <a class="code" href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#a1df661cd2b63498a87d6a253f6f7c195">NewTextSampleCB</a>& new_text_sample_cb,</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <a class="code" href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html">KeySource</a>* decryption_key_source) <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordtype">bool</span> <a class="code" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a6c2d4b5b36304831e637f7ae1b9e54a2">Flush</a>() <span class="keyword">override</span> WARN_UNUSED_RESULT;</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordtype">bool</span> <a class="code" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a40940ec01d965e3a78213861a93f7cfc">Parse</a>(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size) <span class="keyword">override</span> WARN_UNUSED_RESULT;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  </div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">enum</span> State {</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  kWaitingForInit,</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  kParsingHeaders,</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  kParsingClusters,</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  kError</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  };</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">void</span> ChangeState(State new_state);</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>  <span class="comment">// Parses WebM Header, Info, Tracks elements. It also skips other level 1</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="comment">// elements that are not used right now. Once the Info & Tracks elements have</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// been parsed, this method will transition the parser from PARSING_HEADERS to</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// PARSING_CLUSTERS.</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="comment">// Returns < 0 if the parse fails.</span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="comment">// Returns 0 if more data is needed.</span></div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="comment">// Returning > 0 indicates success & the number of bytes parsed.</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">int</span> ParseInfoAndTracks(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">int</span> size);</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>  <span class="comment">// Incrementally parses WebM cluster elements. This method also skips</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// CUES elements if they are encountered since we currently don't use the</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="comment">// data in these elements.</span></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="comment">// Returns < 0 if the parse fails.</span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// Returns 0 if more data is needed.</span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="comment">// Returning > 0 indicates success & the number of bytes parsed.</span></div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordtype">int</span> ParseCluster(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">int</span> size);</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="comment">// Fetch keys for the input key ids. Returns true on success, false otherwise.</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordtype">bool</span> FetchKeysIfNecessary(<span class="keyword">const</span> std::string& audio_encryption_key_id,</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keyword">const</span> std::string& video_encryption_key_id);</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>  State state_;</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="code" href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#aef5795d2b3df2526c6e8afe1e4d072bf">InitCB</a> init_cb_;</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <a class="code" href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#ad86528c837c0a773f7e853c38a4a3af2">NewMediaSampleCB</a> new_sample_cb_;</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <a class="code" href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html">KeySource</a>* decryption_key_source_;</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordtype">bool</span> ignore_text_tracks_;</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordtype">bool</span> unknown_segment_size_;</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  </div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  std::unique_ptr<WebMClusterParser> cluster_parser_;</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <a class="code" href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html">ByteQueue</a> byte_queue_;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  </div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  DISALLOW_COPY_AND_ASSIGN(<a class="code" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html">WebMMediaParser</a>);</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>  </div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> } <span class="comment">// namespace shaka</span></div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#endif // PACKAGER_MEDIA_FORMATS_WEBM_WEBM_MEDIA_PARSER_H_</span></div>
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</div><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="aclassshaka_1_1media_1_1MediaParser_html"><div class="ttname"><a href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html">shaka::media::MediaParser</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d12/media__parser_8h_source.html#l00025">media_parser.h:25</a></div></div>
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<div class="ttc" id="anamespaceshaka_html"><div class="ttname"><a href="../../d8/daf/namespaceshaka.html">shaka</a></div><div class="ttdoc">All the methods that are virtual are virtual for mocking.</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d15/gflags__hex__bytes_8cc_source.html#l00011">gflags_hex_bytes.cc:11</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1MediaParser_html_ad86528c837c0a773f7e853c38a4a3af2"><div class="ttname"><a href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#ad86528c837c0a773f7e853c38a4a3af2">shaka::media::MediaParser::NewMediaSampleCB</a></div><div class="ttdeci">base::Callback< bool(uint32_t track_id, std::shared_ptr< MediaSample > media_sample)> NewMediaSampleCB</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d12/media__parser_8h_source.html#l00044">media_parser.h:44</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1WebMMediaParser_html_a6c2d4b5b36304831e637f7ae1b9e54a2"><div class="ttname"><a href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a6c2d4b5b36304831e637f7ae1b9e54a2">shaka::media::WebMMediaParser::Flush</a></div><div class="ttdeci">bool Flush() override WARN_UNUSED_RESULT</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/dff/webm__media__parser_8cc_source.html#l00044">webm_media_parser.cc:44</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1MediaParser_html_aef5795d2b3df2526c6e8afe1e4d072bf"><div class="ttname"><a href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#aef5795d2b3df2526c6e8afe1e4d072bf">shaka::media::MediaParser::InitCB</a></div><div class="ttdeci">base::Callback< void(const std::vector< std::shared_ptr< StreamInfo > > &stream_info)> InitCB</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d12/media__parser_8h_source.html#l00035">media_parser.h:35</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1WebMMediaParser_html"><div class="ttname"><a href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html">shaka::media::WebMMediaParser</a></div><div class="ttdef"><b>Definition:</b> <a href="../../dc/d58/webm__media__parser_8h_source.html#l00018">webm_media_parser.h:18</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1KeySource_html"><div class="ttname"><a href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html">shaka::media::KeySource</a></div><div class="ttdoc">KeySource is responsible for encryption key acquisition.</div><div class="ttdef"><b>Definition:</b> <a href="../../dc/d3f/key__source_8h_source.html#l00051">key_source.h:51</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1MediaParser_html_a1df661cd2b63498a87d6a253f6f7c195"><div class="ttname"><a href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#a1df661cd2b63498a87d6a253f6f7c195">shaka::media::MediaParser::NewTextSampleCB</a></div><div class="ttdeci">base::Callback< bool(uint32_t track_id, std::shared_ptr< TextSample > text_sample)> NewTextSampleCB</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d12/media__parser_8h_source.html#l00053">media_parser.h:53</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1WebMMediaParser_html_ac66eb6507aef7995a3dcb02967e1cb8b"><div class="ttname"><a href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#ac66eb6507aef7995a3dcb02967e1cb8b">shaka::media::WebMMediaParser::Init</a></div><div class="ttdeci">void Init(const InitCB &init_cb, const NewMediaSampleCB &new_media_sample_cb, const NewTextSampleCB &new_text_sample_cb, KeySource *decryption_key_source) override</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/dff/webm__media__parser_8cc_source.html#l00028">webm_media_parser.cc:28</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1ByteQueue_html"><div class="ttname"><a href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html">shaka::media::ByteQueue</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d7/dc6/byte__queue_8h_source.html#l00022">byte_queue.h:22</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1WebMMediaParser_html_a40940ec01d965e3a78213861a93f7cfc"><div class="ttname"><a href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a40940ec01d965e3a78213861a93f7cfc">shaka::media::WebMMediaParser::Parse</a></div><div class="ttdeci">bool Parse(const uint8_t *buf, int size) override WARN_UNUSED_RESULT</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/dff/webm__media__parser_8cc_source.html#l00057">webm_media_parser.cc:57</a></div></div>
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