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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_parser.h</div> </div>
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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">#ifndef MEDIA_FORMATS_WEBM_WEBM_PARSER_H_</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define MEDIA_FORMATS_WEBM_WEBM_PARSER_H_</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="preprocessor">#include &lt;stdint.h&gt;</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="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></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="preprocessor">#include &quot;packager/base/macros.h&quot;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="keyword">namespace </span>edash_packager {</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="keyword">namespace </span>media {</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="../../de/da5/classedash__packager_1_1media_1_1WebMParserClient.html"> 30</a></span>&#160;<span class="keyword">class </span><a class="code" href="../../de/da5/classedash__packager_1_1media_1_1WebMParserClient.html">WebMParserClient</a> {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <span class="keyword">virtual</span> ~<a class="code" href="../../de/da5/classedash__packager_1_1media_1_1WebMParserClient.html">WebMParserClient</a>();</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="keyword">virtual</span> <a class="code" href="../../de/da5/classedash__packager_1_1media_1_1WebMParserClient.html">WebMParserClient</a>* OnListStart(<span class="keywordtype">int</span> <span class="keywordtype">id</span>);</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">bool</span> OnListEnd(<span class="keywordtype">int</span> <span class="keywordtype">id</span>);</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">bool</span> OnUInt(<span class="keywordtype">int</span> <span class="keywordtype">id</span>, int64_t val);</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">bool</span> OnFloat(<span class="keywordtype">int</span> <span class="keywordtype">id</span>, <span class="keywordtype">double</span> val);</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">bool</span> 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="l00039"></a><span class="lineno"> 39</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">bool</span> 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="l00040"></a><span class="lineno"> 40</span>&#160;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <a class="code" href="../../de/da5/classedash__packager_1_1media_1_1WebMParserClient.html">WebMParserClient</a>();</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; DISALLOW_COPY_AND_ASSIGN(<a class="code" href="../../de/da5/classedash__packager_1_1media_1_1WebMParserClient.html">WebMParserClient</a>);</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;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;<span class="keyword">struct </span>ListElementInfo;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;</div>
<div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html"> 54</a></span>&#160;<span class="keyword">class </span><a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html">WebMListParser</a> {</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#ac259917babda572b9c37e92acdd2c00d">WebMListParser</a>(<span class="keywordtype">int</span> <span class="keywordtype">id</span>, <a class="code" href="../../de/da5/classedash__packager_1_1media_1_1WebMParserClient.html">WebMParserClient</a>* client);</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; ~<a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html">WebMListParser</a>();</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keywordtype">void</span> <a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#a4e274d491d064174cb0e29d0e579eb71">Reset</a>();</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keywordtype">int</span> <a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#a5b3b0c8fd0423044d0090357428b8ee0">Parse</a>(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size);</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#aabb9e87d04df9de57d7069a8943a1711">IsParsingComplete</a>() <span class="keyword">const</span>;</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; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="keyword">enum</span> State {</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; NEED_LIST_HEADER,</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; INSIDE_LIST,</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; DONE_PARSING_LIST,</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; PARSE_ERROR,</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; };</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keyword">struct </span>ListState {</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="keywordtype">int</span> id_;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; int64_t size_;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; int64_t bytes_parsed_;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keyword">const</span> ListElementInfo* element_info_;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <a class="code" href="../../de/da5/classedash__packager_1_1media_1_1WebMParserClient.html">WebMParserClient</a>* client_;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; };</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keywordtype">void</span> ChangeState(State new_state);</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="comment">// Parses a single element in the current list.</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="comment">// |header_size| - The size of the element header</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="comment">// |id| - The ID of the element being parsed.</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="comment">// |element_size| - The size of the element body.</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="comment">// |data| - Pointer to the element contents.</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="comment">// |size| - Number of bytes in |data|</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="comment">// |client| - Client to pass the parsed data to.</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <span class="comment">// Returns &lt; 0 if the parse fails.</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; <span class="comment">// Returns 0 if more data is needed.</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="comment">// Returning &gt; 0 indicates success &amp; the number of bytes parsed.</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="keywordtype">int</span> ParseListElement(<span class="keywordtype">int</span> header_size,</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <span class="keywordtype">int</span> <span class="keywordtype">id</span>,</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; int64_t element_size,</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="keyword">const</span> uint8_t* data,</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <span class="keywordtype">int</span> size);</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <span class="comment">// Called when starting to parse a new list.</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; <span class="comment">// |id| - The ID of the new list.</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <span class="comment">// |size| - The size of the new list.</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; <span class="comment">// |client| - The client object to notify that a new list is being parsed.</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; <span class="comment">// Returns true if this list can be started in the current context. False</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; <span class="comment">// if starting this list causes some sort of parse error.</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="keywordtype">bool</span> OnListStart(<span class="keywordtype">int</span> <span class="keywordtype">id</span>, int64_t size);</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; <span class="comment">// Called when the end of the current list has been reached. This may also</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; <span class="comment">// signal the end of the current list&#39;s ancestors if the current list happens</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="comment">// to be at the end of its parent.</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; <span class="comment">// Returns true if no errors occurred while ending this list(s).</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="keywordtype">bool</span> OnListEnd();</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; <span class="comment">// Checks to see if |id_b| is a sibling or ancestor of |id_a|.</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="keywordtype">bool</span> IsSiblingOrAncestor(<span class="keywordtype">int</span> id_a, <span class="keywordtype">int</span> id_b) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; State state_;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; <span class="comment">// Element ID passed to the constructor.</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; <span class="keyword">const</span> <span class="keywordtype">int</span> root_id_;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="comment">// Element level for |root_id_|. Used to verify that elements appear at</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="comment">// the correct level.</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; <span class="keyword">const</span> <span class="keywordtype">int</span> root_level_;</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; <span class="comment">// WebMParserClient to handle the root list.</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; <a class="code" href="../../de/da5/classedash__packager_1_1media_1_1WebMParserClient.html">WebMParserClient</a>* <span class="keyword">const</span> root_client_;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="comment">// Stack of state for all the lists currently being parsed. Lists are</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; <span class="comment">// added and removed from this stack as they are parsed.</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; std::vector&lt;ListState&gt; list_state_stack_;</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; DISALLOW_COPY_AND_ASSIGN(<a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html">WebMListParser</a>);</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160;};</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160;<span class="keywordtype">int</span> WebMParseElementHeader(<span class="keyword">const</span> uint8_t* buf,</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; <span class="keywordtype">int</span> size,</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; <span class="keywordtype">int</span>* <span class="keywordtype">id</span>,</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; int64_t* element_size);</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160;} <span class="comment">// namespace media</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160;} <span class="comment">// namespace edash_packager</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;<span class="preprocessor">#endif // MEDIA_FORMATS_WEBM_WEBM_PARSER_H_</span></div>
<div class="ttc" id="classedash__packager_1_1media_1_1WebMParserClient_html"><div class="ttname"><a href="../../de/da5/classedash__packager_1_1media_1_1WebMParserClient.html">edash_packager::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="classedash__packager_1_1media_1_1WebMListParser_html_aabb9e87d04df9de57d7069a8943a1711"><div class="ttname"><a href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#aabb9e87d04df9de57d7069a8943a1711">edash_packager::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="classedash__packager_1_1media_1_1WebMListParser_html_ac259917babda572b9c37e92acdd2c00d"><div class="ttname"><a href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#ac259917babda572b9c37e92acdd2c00d">edash_packager::media::WebMListParser::WebMListParser</a></div><div class="ttdeci">WebMListParser(int id, WebMParserClient *client)</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/db6/webm__parser_8cc_source.html#l00703">webm_parser.cc:703</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1WebMListParser_html_a5b3b0c8fd0423044d0090357428b8ee0"><div class="ttname"><a href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#a5b3b0c8fd0423044d0090357428b8ee0">edash_packager::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="classedash__packager_1_1media_1_1WebMListParser_html"><div class="ttname"><a href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html">edash_packager::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="classedash__packager_1_1media_1_1WebMListParser_html_a4e274d491d064174cb0e29d0e579eb71"><div class="ttname"><a href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#a4e274d491d064174cb0e29d0e579eb71">edash_packager::media::WebMListParser::Reset</a></div><div class="ttdeci">void Reset()</div><div class="ttdoc">Resets the state of the parser so it can start parsing a new list. </div><div class="ttdef"><b>Definition:</b> <a href="../../d3/db6/webm__parser_8cc_source.html#l00714">webm_parser.cc:714</a></div></div>
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