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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">// Copyright 2014 The Chromium Authors. All rights reserved.</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">// Use of this source code is governed by a BSD-style license that can be</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// found in the LICENSE file.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;</div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="preprocessor">#include &quot;packager/media/formats/webm/webm_info_parser.h&quot;</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/base/logging.h&quot;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="preprocessor">#include &quot;packager/media/formats/webm/webm_constants.h&quot;</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="keyword">namespace </span>shaka {</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="keyword">namespace </span>media {</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment">// Default timecode scale if the TimecodeScale element is</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment">// not specified in the INFO element.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> kWebMDefaultTimecodeScale = 1000000;</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;WebMInfoParser::WebMInfoParser()</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160; : timecode_scale_(-1),</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; duration_(-1) {</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;}</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;WebMInfoParser::~WebMInfoParser() {}</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"><a class="line" href="../../db/dae/classshaka_1_1media_1_1WebMInfoParser.html#ae0b4d37e02d43627b1bc9c64f43ee3f7"> 24</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="../../db/dae/classshaka_1_1media_1_1WebMInfoParser.html#ae0b4d37e02d43627b1bc9c64f43ee3f7">WebMInfoParser::Parse</a>(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size) {</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; timecode_scale_ = -1;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; duration_ = -1;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; <a class="code" href="../../dc/dca/classshaka_1_1media_1_1WebMListParser.html">WebMListParser</a> parser(kWebMIdInfo, <span class="keyword">this</span>);</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <span class="keywordtype">int</span> result = parser.<a class="code" href="../../dc/dca/classshaka_1_1media_1_1WebMListParser.html#acd805b7eb25afcd9a3be2d8d88e3c6af">Parse</a>(buf, size);</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <span class="keywordflow">if</span> (result &lt;= 0)</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <span class="keywordflow">return</span> result;</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; <span class="comment">// For now we do all or nothing parsing.</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keywordflow">return</span> parser.<a class="code" href="../../dc/dca/classshaka_1_1media_1_1WebMListParser.html#acf786fc2e07143c3f1a481401240d105">IsParsingComplete</a>() ? result : 0;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;}</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<a class="code" href="../../d5/dec/classshaka_1_1media_1_1WebMParserClient.html">WebMParserClient</a>* WebMInfoParser::OnListStart(<span class="keywordtype">int</span> <span class="keywordtype">id</span>) { <span class="keywordflow">return</span> <span class="keyword">this</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;<span class="keywordtype">bool</span> WebMInfoParser::OnListEnd(<span class="keywordtype">int</span> <span class="keywordtype">id</span>) {</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keywordflow">if</span> (<span class="keywordtype">id</span> == kWebMIdInfo &amp;&amp; timecode_scale_ == -1) {</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="comment">// Set timecode scale to default value if it isn&#39;t present in</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="comment">// the Info element.</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; timecode_scale_ = kWebMDefaultTimecodeScale;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; }</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;}</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;<span class="keywordtype">bool</span> WebMInfoParser::OnUInt(<span class="keywordtype">int</span> <span class="keywordtype">id</span>, int64_t val) {</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keywordflow">if</span> (<span class="keywordtype">id</span> != kWebMIdTimecodeScale)</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keywordflow">if</span> (timecode_scale_ != -1) {</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; DVLOG(1) &lt;&lt; <span class="stringliteral">&quot;Multiple values for id &quot;</span> &lt;&lt; std::hex &lt;&lt; <span class="keywordtype">id</span> &lt;&lt; <span class="stringliteral">&quot; specified&quot;</span>;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; }</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; timecode_scale_ = val;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</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;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;<span class="keywordtype">bool</span> WebMInfoParser::OnFloat(<span class="keywordtype">int</span> <span class="keywordtype">id</span>, <span class="keywordtype">double</span> val) {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="keywordflow">if</span> (<span class="keywordtype">id</span> != kWebMIdDuration) {</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; DVLOG(1) &lt;&lt; <span class="stringliteral">&quot;Unexpected float for id&quot;</span> &lt;&lt; std::hex &lt;&lt; id;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; }</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keywordflow">if</span> (duration_ != -1) {</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; DVLOG(1) &lt;&lt; <span class="stringliteral">&quot;Multiple values for duration.&quot;</span>;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</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; duration_ = val;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;}</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;<span class="keywordtype">bool</span> WebMInfoParser::OnBinary(<span class="keywordtype">int</span> <span class="keywordtype">id</span>, <span class="keyword">const</span> uint8_t* data, <span class="keywordtype">int</span> size) {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordflow">if</span> (<span class="keywordtype">id</span> == kWebMIdDateUTC) {</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordflow">if</span> (size != 8)</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</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; int64_t date_in_nanoseconds = 0;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; size; ++i)</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; date_in_nanoseconds = (date_in_nanoseconds &lt;&lt; 8) | data[i];</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; base::Time::Exploded exploded_epoch;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; exploded_epoch.year = 2001;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; exploded_epoch.month = 1;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; exploded_epoch.day_of_month = 1;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; exploded_epoch.hour = 0;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; exploded_epoch.minute = 0;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; exploded_epoch.second = 0;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; exploded_epoch.millisecond = 0;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; date_utc_ = base::Time::FromUTCExploded(exploded_epoch) +</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; base::TimeDelta::FromMicroseconds(date_in_nanoseconds / 1000);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; }</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;}</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;<span class="keywordtype">bool</span> WebMInfoParser::OnString(<span class="keywordtype">int</span> <span class="keywordtype">id</span>, <span class="keyword">const</span> std::string&amp; str) {</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;}</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;} <span class="comment">// namespace media</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;} <span class="comment">// namespace shaka</span></div>
<div class="ttc" id="classshaka_1_1media_1_1WebMListParser_html"><div class="ttname"><a href="../../dc/dca/classshaka_1_1media_1_1WebMListParser.html">shaka::media::WebMListParser</a></div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d46/webm__parser_8h_source.html#l00054">webm_parser.h:54</a></div></div>
<div class="ttc" id="classshaka_1_1media_1_1WebMListParser_html_acd805b7eb25afcd9a3be2d8d88e3c6af"><div class="ttname"><a href="../../dc/dca/classshaka_1_1media_1_1WebMListParser.html#acd805b7eb25afcd9a3be2d8d88e3c6af">shaka::media::WebMListParser::Parse</a></div><div class="ttdeci">int Parse(const uint8_t *buf, int size)</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/db6/webm__parser_8cc_source.html#l00719">webm_parser.cc:719</a></div></div>
<div class="ttc" id="classshaka_1_1media_1_1WebMListParser_html_acf786fc2e07143c3f1a481401240d105"><div class="ttname"><a href="../../dc/dca/classshaka_1_1media_1_1WebMListParser.html#acf786fc2e07143c3f1a481401240d105">shaka::media::WebMListParser::IsParsingComplete</a></div><div class="ttdeci">bool IsParsingComplete() const </div><div class="ttdef"><b>Definition:</b> <a href="../../d3/db6/webm__parser_8cc_source.html#l00803">webm_parser.cc:803</a></div></div>
<div class="ttc" id="classshaka_1_1media_1_1WebMParserClient_html"><div class="ttname"><a href="../../d5/dec/classshaka_1_1media_1_1WebMParserClient.html">shaka::media::WebMParserClient</a></div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d46/webm__parser_8h_source.html#l00030">webm_parser.h:30</a></div></div>
<div class="ttc" id="classshaka_1_1media_1_1WebMInfoParser_html_ae0b4d37e02d43627b1bc9c64f43ee3f7"><div class="ttname"><a href="../../db/dae/classshaka_1_1media_1_1WebMInfoParser.html#ae0b4d37e02d43627b1bc9c64f43ee3f7">shaka::media::WebMInfoParser::Parse</a></div><div class="ttdeci">int Parse(const uint8_t *buf, int size)</div><div class="ttdef"><b>Definition:</b> <a href="../../df/d7d/webm__info__parser_8cc_source.html#l00024">webm_info_parser.cc:24</a></div></div>
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