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<li class="navelem"><a class="el" href="../../dir_39dc0668bd5a501998f94e8b4e546c71.html">media</a></li><li class="navelem"><a class="el" href="../../dir_65f7acfa8cf3a5f1edc11faa2428b914.html">formats</a></li><li class="navelem"><a class="el" href="../../dir_5039d854a18988ed1f1dbebc120ffbf7.html">webm</a></li> </ul>
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<div class="title">webm_media_parser.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 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">#include "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> </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <string></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/callback.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/callback_helpers.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/logging.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_writer.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/base/timestamp.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/webm/webm_cluster_parser.h"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "packager/media/formats/webm/webm_constants.h"</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "packager/media/formats/webm/webm_content_encodings.h"</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "packager/media/formats/webm/webm_info_parser.h"</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "packager/media/formats/webm/webm_tracks_parser.h"</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">namespace </span>shaka {</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>media {</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="l00023"></a><span class="lineno"> 23</span> WebMMediaParser::WebMMediaParser()</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  : state_(kWaitingForInit), unknown_segment_size_(false) {}</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> WebMMediaParser::~WebMMediaParser() {}</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="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a5cd5c298938e2c58c45f962b21e43b2e"> 28</a></span> <span class="keywordtype">void</span> <a class="code" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a5cd5c298938e2c58c45f962b21e43b2e">WebMMediaParser::Init</a>(<span class="keyword">const</span> InitCB& init_cb,</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keyword">const</span> <a class="code" href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#a3a1f87fb3ed95a9cbd2b6873326a1a4c">NewSampleCB</a>& new_sample_cb,</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</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="l00031"></a><span class="lineno"> 31</span>  DCHECK_EQ(state_, kWaitingForInit);</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  DCHECK(init_cb_.is_null());</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  DCHECK(!init_cb.is_null());</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  DCHECK(!new_sample_cb.is_null());</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>  ChangeState(kParsingHeaders);</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  init_cb_ = init_cb;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  new_sample_cb_ = new_sample_cb;</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  decryption_key_source_ = decryption_key_source;</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  ignore_text_tracks_ = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> }</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"><a class="line" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a6c2d4b5b36304831e637f7ae1b9e54a2"> 43</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a6c2d4b5b36304831e637f7ae1b9e54a2">WebMMediaParser::Flush</a>() {</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  DCHECK_NE(state_, kWaitingForInit);</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>  byte_queue_.<a class="code" href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#ab1659ef71098c37e9fb4e55ab1664e84">Reset</a>();</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordtype">bool</span> result = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">if</span> (cluster_parser_)</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  result = cluster_parser_->Flush();</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">if</span> (state_ == kParsingClusters) {</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  ChangeState(kParsingHeaders);</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="keywordflow">return</span> result;</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</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"><a class="line" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a40940ec01d965e3a78213861a93f7cfc"> 56</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a40940ec01d965e3a78213861a93f7cfc">WebMMediaParser::Parse</a>(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size) {</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  DCHECK_NE(state_, kWaitingForInit);</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">if</span> (state_ == kError)</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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>  byte_queue_.<a class="code" href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#acea792e406efe5119cec2e3e522e02c2">Push</a>(buf, size);</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordtype">int</span> result = 0;</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordtype">int</span> bytes_parsed = 0;</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">const</span> uint8_t* cur = NULL;</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordtype">int</span> cur_size = 0;</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>  byte_queue_.<a class="code" href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#a838fe5642e533477a5e229981e5f06e7">Peek</a>(&cur, &cur_size);</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">while</span> (cur_size > 0) {</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  State oldState = state_;</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">switch</span> (state_) {</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">case</span> kParsingHeaders:</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  result = ParseInfoAndTracks(cur, cur_size);</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">break</span>;</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>  <span class="keywordflow">case</span> kParsingClusters:</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  result = ParseCluster(cur, cur_size);</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">break</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"> 81</span>  <span class="keywordflow">case</span> kWaitingForInit:</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">case</span> kError:</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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"> 86</span>  <span class="keywordflow">if</span> (result < 0) {</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  ChangeState(kError);</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  }</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">if</span> (state_ == oldState && result == 0)</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">break</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>  DCHECK_GE(result, 0);</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  cur += result;</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  cur_size -= result;</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  bytes_parsed += result;</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  byte_queue_.<a class="code" href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#a31b30d39d14fca3ce722b4233de95c79">Pop</a>(bytes_parsed);</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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> </div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="keywordtype">void</span> WebMMediaParser::ChangeState(State new_state) {</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  DVLOG(1) << <span class="stringliteral">"ChangeState() : "</span> << state_ << <span class="stringliteral">" -> "</span> << new_state;</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  state_ = new_state;</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"> 108</span> </div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="keywordtype">int</span> WebMMediaParser::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="l00110"></a><span class="lineno"> 110</span>  DVLOG(2) << <span class="stringliteral">"ParseInfoAndTracks()"</span>;</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  DCHECK(data);</div>
|
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  DCHECK_GT(size, 0);</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div>
|
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keyword">const</span> uint8_t* cur = data;</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordtype">int</span> cur_size = size;</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordtype">int</span> bytes_parsed = 0;</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">int</span> id;</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  int64_t element_size;</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordtype">int</span> result = WebMParseElementHeader(cur, cur_size, &<span class="keywordtype">id</span>, &element_size);</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">if</span> (result <= 0)</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">return</span> result;</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="keywordflow">switch</span> (<span class="keywordtype">id</span>) {</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">case</span> kWebMIdEBMLHeader:</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">case</span> kWebMIdSeekHead:</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">case</span> kWebMIdVoid:</div>
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|
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">case</span> kWebMIdCRC32:</div>
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|
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">case</span> kWebMIdCues:</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">case</span> kWebMIdChapters:</div>
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|
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">case</span> kWebMIdTags:</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">case</span> kWebMIdAttachments:</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="comment">// TODO: Implement support for chapters.</span></div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">if</span> (cur_size < (result + element_size)) {</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="comment">// We don't have the whole element yet. Signal we need more data.</span></div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">return</span> 0;</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div>
|
|
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="comment">// Skip the element.</span></div>
|
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordflow">return</span> result + element_size;</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">case</span> kWebMIdCluster:</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">if</span> (!cluster_parser_) {</div>
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|
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  LOG(ERROR) << <span class="stringliteral">"Found Cluster element before Info."</span>;</div>
|
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">return</span> -1;</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  }</div>
|
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  ChangeState(kParsingClusters);</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">return</span> 0;</div>
|
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">break</span>;</div>
|
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">case</span> kWebMIdSegment:</div>
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|
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="comment">// Segment of unknown size indicates live stream.</span></div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">if</span> (element_size == kWebMUnknownSize)</div>
|
|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  unknown_segment_size_ = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">// Just consume the segment header.</span></div>
|
|
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">return</span> result;</div>
|
|
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">case</span> kWebMIdInfo:</div>
|
|
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">// We've found the element we are looking for.</span></div>
|
|
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">default</span>: {</div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  LOG(ERROR) << <span class="stringliteral">"Unexpected element ID 0x"</span> << std::hex << id;</div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">return</span> -1;</div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  }</div>
|
|
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  }</div>
|
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> </div>
|
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  WebMInfoParser info_parser;</div>
|
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  result = info_parser.Parse(cur, cur_size);</div>
|
|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
|
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordflow">if</span> (result <= 0)</div>
|
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">return</span> result;</div>
|
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div>
|
|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  cur += result;</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  cur_size -= result;</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  bytes_parsed += result;</div>
|
|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  WebMTracksParser tracks_parser(ignore_text_tracks_);</div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  result = tracks_parser.Parse(cur, cur_size);</div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">if</span> (result <= 0)</div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">return</span> result;</div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  bytes_parsed += result;</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>  <span class="keywordtype">double</span> timecode_scale_in_us = info_parser.timecode_scale() / 1000.0;</div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  int64_t duration_in_us = info_parser.duration() * timecode_scale_in_us;</div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  std::shared_ptr<AudioStreamInfo> audio_stream_info =</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  tracks_parser.audio_stream_info();</div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">if</span> (audio_stream_info) {</div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  audio_stream_info->set_duration(duration_in_us);</div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  VLOG(1) << <span class="stringliteral">"No audio track info found."</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> </div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  std::shared_ptr<VideoStreamInfo> video_stream_info =</div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  tracks_parser.video_stream_info();</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">if</span> (video_stream_info) {</div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  video_stream_info->set_duration(duration_in_us);</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  VLOG(1) << <span class="stringliteral">"No video track info found."</span>;</div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  }</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">if</span> (!FetchKeysIfNecessary(tracks_parser.audio_encryption_key_id(),</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  tracks_parser.video_encryption_key_id())) {</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">return</span> -1;</div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  }</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  cluster_parser_.reset(<span class="keyword">new</span> WebMClusterParser(</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  info_parser.timecode_scale(), audio_stream_info, video_stream_info,</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  tracks_parser.GetAudioDefaultDuration(timecode_scale_in_us),</div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  tracks_parser.GetVideoDefaultDuration(timecode_scale_in_us),</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  tracks_parser.text_tracks(), tracks_parser.ignored_tracks(),</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  tracks_parser.audio_encryption_key_id(),</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  tracks_parser.video_encryption_key_id(), new_sample_cb_, init_cb_,</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  decryption_key_source_));</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">return</span> bytes_parsed;</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> </div>
|
|
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="keywordtype">int</span> WebMMediaParser::ParseCluster(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">int</span> size) {</div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">if</span> (!cluster_parser_)</div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">return</span> -1;</div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> </div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordtype">int</span> bytes_parsed = cluster_parser_->Parse(data, size);</div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">if</span> (bytes_parsed < 0)</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">return</span> bytes_parsed;</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> </div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordtype">bool</span> cluster_ended = cluster_parser_->cluster_ended();</div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">if</span> (cluster_ended) {</div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  ChangeState(kParsingHeaders);</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="keywordflow">return</span> bytes_parsed;</div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> }</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> </div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="keywordtype">bool</span> WebMMediaParser::FetchKeysIfNecessary(</div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keyword">const</span> std::string& audio_encryption_key_id,</div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keyword">const</span> std::string& video_encryption_key_id) {</div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordflow">if</span> (audio_encryption_key_id.empty() && video_encryption_key_id.empty())</div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="comment">// An error will be returned later if the samples need to be decrypted.</span></div>
|
|
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">if</span> (!decryption_key_source_)</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> </div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  std::vector<std::vector<uint8_t>> key_ids;</div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">if</span> (!audio_encryption_key_id.empty()) {</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  key_ids.push_back(std::vector<uint8_t>(audio_encryption_key_id.begin(),</div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  audio_encryption_key_id.end()));</div>
|
|
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  }</div>
|
|
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keywordflow">if</span> (!video_encryption_key_id.empty()) {</div>
|
|
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  key_ids.push_back(std::vector<uint8_t>(video_encryption_key_id.begin(),</div>
|
|
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  video_encryption_key_id.end()));</div>
|
|
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  }</div>
|
|
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> </div>
|
|
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  Status status = decryption_key_source_-><a class="code" href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html#aca6ecdac6ebc131d3626b765f64cb2de">FetchKeys</a>(key_ids);</div>
|
|
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordflow">if</span> (!status.ok()) {</div>
|
|
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  LOG(ERROR) << <span class="stringliteral">"Error fetching decryption keys: "</span> << status;</div>
|
|
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  }</div>
|
|
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> }</div>
|
|
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div>
|
|
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> } <span class="comment">// namespace media</span></div>
|
|
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> } <span class="comment">// namespace shaka</span></div>
|
|
<div class="ttc" id="classshaka_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#l00043">webm_media_parser.cc:43</a></div></div>
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<div class="ttc" id="classshaka_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#l00056">webm_media_parser.cc:56</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1WebMMediaParser_html_a5cd5c298938e2c58c45f962b21e43b2e"><div class="ttname"><a href="../../d2/ddb/classshaka_1_1media_1_1WebMMediaParser.html#a5cd5c298938e2c58c45f962b21e43b2e">shaka::media::WebMMediaParser::Init</a></div><div class="ttdeci">void Init(const InitCB &init_cb, const NewSampleCB &new_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="classshaka_1_1media_1_1ByteQueue_html_acea792e406efe5119cec2e3e522e02c2"><div class="ttname"><a href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#acea792e406efe5119cec2e3e522e02c2">shaka::media::ByteQueue::Push</a></div><div class="ttdeci">void Push(const uint8_t *data, int size)</div><div class="ttdoc">Append new bytes to the end of the queue. </div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00029">byte_queue.cc:29</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1ByteQueue_html_a31b30d39d14fca3ce722b4233de95c79"><div class="ttname"><a href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#a31b30d39d14fca3ce722b4233de95c79">shaka::media::ByteQueue::Pop</a></div><div class="ttdeci">void Pop(int count)</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00070">byte_queue.cc:70</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1KeySource_html_aca6ecdac6ebc131d3626b765f64cb2de"><div class="ttname"><a href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html#aca6ecdac6ebc131d3626b765f64cb2de">shaka::media::KeySource::FetchKeys</a></div><div class="ttdeci">virtual Status FetchKeys(const std::vector< uint8_t > &pssh_box)=0</div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaParser_html_a3a1f87fb3ed95a9cbd2b6873326a1a4c"><div class="ttname"><a href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#a3a1f87fb3ed95a9cbd2b6873326a1a4c">shaka::media::MediaParser::NewSampleCB</a></div><div class="ttdeci">base::Callback< bool(uint32_t track_id, const std::shared_ptr< MediaSample > &media_sample)> NewSampleCB</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d12/media__parser_8h_source.html#l00043">media_parser.h:43</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1ByteQueue_html_ab1659ef71098c37e9fb4e55ab1664e84"><div class="ttname"><a href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#ab1659ef71098c37e9fb4e55ab1664e84">shaka::media::ByteQueue::Reset</a></div><div class="ttdeci">void Reset()</div><div class="ttdoc">Reset the queue to the empty state. </div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00024">byte_queue.cc:24</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1ByteQueue_html_a838fe5642e533477a5e229981e5f06e7"><div class="ttname"><a href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#a838fe5642e533477a5e229981e5f06e7">shaka::media::ByteQueue::Peek</a></div><div class="ttdeci">void Peek(const uint8_t **data, int *size) const </div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00063">byte_queue.cc:63</a></div></div>
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<div class="ttc" id="classshaka_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#l00030">key_source.h:30</a></div></div>
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