shaka-packager/docs/dc/d58/webm__media__parser_8h_sour...

186 lines
21 KiB
HTML
Raw Normal View History

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.6"/>
<title>DASH Media Packaging SDK: media/formats/webm/webm_media_parser.h Source File</title>
<link href="../../tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="../../jquery.js"></script>
<script type="text/javascript" src="../../dynsections.js"></script>
<link href="../../search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="../../search/search.js"></script>
<script type="text/javascript">
$(document).ready(function() { searchBox.OnSelectItem(0); });
</script>
<link href="../../doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">DASH Media Packaging SDK
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.6 -->
<script type="text/javascript">
var searchBox = new SearchBox("searchBox", "../../search",false,'Search');
</script>
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="../../index.html"><span>Main&#160;Page</span></a></li>
<li><a href="../../namespaces.html"><span>Namespaces</span></a></li>
<li><a href="../../annotated.html"><span>Classes</span></a></li>
<li class="current"><a href="../../files.html"><span>Files</span></a></li>
<li>
<div id="MSearchBox" class="MSearchBoxInactive">
<span class="left">
<img id="MSearchSelect" src="../../search/mag_sel.png"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
alt=""/>
<input type="text" id="MSearchField" value="Search" accesskey="S"
onfocus="searchBox.OnSearchFieldFocus(true)"
onblur="searchBox.OnSearchFieldFocus(false)"
onkeyup="searchBox.OnSearchFieldChange(event)"/>
</span><span class="right">
<a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="../../search/close.png" alt=""/></a>
</span>
</div>
</li>
</ul>
</div>
<div id="navrow2" class="tabs2">
<ul class="tablist">
<li><a href="../../files.html"><span>File&#160;List</span></a></li>
</ul>
</div>
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
onkeydown="return searchBox.OnSearchSelectKey(event)">
<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark">&#160;</span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark">&#160;</span>Classes</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark">&#160;</span>Namespaces</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark">&#160;</span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark">&#160;</span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark">&#160;</span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark">&#160;</span>Enumerator</a></div>
<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0"
name="MSearchResults" id="MSearchResults">
</iframe>
</div>
<div id="nav-path" class="navpath">
<ul>
<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>
</div>
</div><!-- top -->
<div class="header">
<div class="headertitle">
<div class="title">webm_media_parser.h</div> </div>
</div><!--header-->
<div class="contents">
<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_MEDIA_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_MEDIA_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 &quot;packager/base/callback_forward.h&quot;</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="preprocessor">#include &quot;packager/base/memory/ref_counted.h&quot;</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="preprocessor">#include &quot;packager/media/base/byte_queue.h&quot;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#include &quot;packager/media/base/media_parser.h&quot;</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="keyword">namespace </span>edash_packager {</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="keyword">namespace </span>media {</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="keyword">class </span>WebMClusterParser;</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html"> 18</a></span>&#160;<span class="keyword">class </span><a class="code" href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html">WebMMediaParser</a> : <span class="keyword">public</span> <a class="code" href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html">MediaParser</a> {</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; <a class="code" href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html">WebMMediaParser</a>();</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; ~<a class="code" href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html">WebMMediaParser</a>() <span class="keyword">override</span>;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; <span class="keywordtype">void</span> <a class="code" href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html#a8a85bf527013ebbb0b902dcd56039467">Init</a>(<span class="keyword">const</span> <a class="code" href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#af5c74c8723a5306faddcdfdcadb4ab4a">InitCB</a>&amp; init_cb,</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; <span class="keyword">const</span> <a class="code" href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#a1628c19a91f1b8ae123f7350936bfe32">NewSampleCB</a>&amp; new_sample_cb,</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <a class="code" href="../../d9/d8b/classedash__packager_1_1media_1_1KeySource.html">KeySource</a>* decryption_key_source) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <span class="keywordtype">void</span> <a class="code" href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html#a3c0e6fc0e48bb49e6687f566a87e6f12">Flush</a>() <span class="keyword">override</span>;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html#a5a95d3879a9a96830fdcf4f866879143">Parse</a>(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <span class="keyword">enum</span> State {</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; kWaitingForInit,</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; kParsingHeaders,</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; kParsingClusters,</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; kError</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; <span class="keywordtype">void</span> ChangeState(State new_state);</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="comment">// Parses WebM Header, Info, Tracks elements. It also skips other level 1</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="comment">// elements that are not used right now. Once the Info &amp; Tracks elements have</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="comment">// been parsed, this method will transition the parser from PARSING_HEADERS to</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="comment">// PARSING_CLUSTERS.</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <span class="comment">// Returns &lt; 0 if the parse fails.</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="comment">// Returns 0 if more data is needed.</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="comment">// Returning &gt; 0 indicates success &amp; the number of bytes parsed.</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <span class="keywordtype">int</span> ParseInfoAndTracks(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">int</span> size);</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="comment">// Incrementally parses WebM cluster elements. This method also skips</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="comment">// CUES elements if they are encountered since we currently don&#39;t use the</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="comment">// data in these elements.</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <span class="comment">// Returns &lt; 0 if the parse fails.</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="comment">// Returns 0 if more data is needed.</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="comment">// Returning &gt; 0 indicates success &amp; the number of bytes parsed.</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keywordtype">int</span> ParseCluster(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">int</span> size);</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="comment">// Fire needkey event through the |encrypted_media_init_data_cb_|.</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keywordtype">void</span> OnEncryptedMediaInitData(<span class="keyword">const</span> std::string&amp; key_id);</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; State state_;</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <a class="code" href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#af5c74c8723a5306faddcdfdcadb4ab4a">InitCB</a> init_cb_;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <a class="code" href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#a1628c19a91f1b8ae123f7350936bfe32">NewSampleCB</a> new_sample_cb_;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <a class="code" href="../../d9/d8b/classedash__packager_1_1media_1_1KeySource.html">KeySource</a>* decryption_key_source_;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keywordtype">bool</span> ignore_text_tracks_;</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="keywordtype">bool</span> unknown_segment_size_;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; scoped_ptr&lt;WebMClusterParser&gt; cluster_parser_;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <a class="code" href="../../d8/d2e/classedash__packager_1_1media_1_1ByteQueue.html">ByteQueue</a> byte_queue_;</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; DISALLOW_COPY_AND_ASSIGN(<a class="code" href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html">WebMMediaParser</a>);</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;};</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;} <span class="comment">// namespace media</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;} <span class="comment">// namespace edash_packager</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;<span class="preprocessor">#endif // MEDIA_FORMATS_WEBM_WEBM_MEDIA_PARSER_H_</span></div>
<div class="ttc" id="classedash__packager_1_1media_1_1WebMMediaParser_html_a5a95d3879a9a96830fdcf4f866879143"><div class="ttname"><a href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html#a5a95d3879a9a96830fdcf4f866879143">edash_packager::media::WebMMediaParser::Parse</a></div><div class="ttdeci">bool Parse(const uint8_t *buf, int size) override</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/dff/webm__media__parser_8cc_source.html#l00053">webm_media_parser.cc:53</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1WebMMediaParser_html_a3c0e6fc0e48bb49e6687f566a87e6f12"><div class="ttname"><a href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html#a3c0e6fc0e48bb49e6687f566a87e6f12">edash_packager::media::WebMMediaParser::Flush</a></div><div class="ttdeci">void Flush() override</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/dff/webm__media__parser_8cc_source.html#l00042">webm_media_parser.cc:42</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1WebMMediaParser_html_a8a85bf527013ebbb0b902dcd56039467"><div class="ttname"><a href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html#a8a85bf527013ebbb0b902dcd56039467">edash_packager::media::WebMMediaParser::Init</a></div><div class="ttdeci">void Init(const InitCB &amp;init_cb, const NewSampleCB &amp;new_sample_cb, KeySource *decryption_key_source) override</div><div class="ttdoc">StreamParser implementation. </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/dff/webm__media__parser_8cc_source.html#l00027">webm_media_parser.cc:27</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1MediaParser_html"><div class="ttname"><a href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html">edash_packager::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>
<div class="ttc" id="classedash__packager_1_1media_1_1WebMMediaParser_html"><div class="ttname"><a href="../../dd/d99/classedash__packager_1_1media_1_1WebMMediaParser.html">edash_packager::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>
<div class="ttc" id="classedash__packager_1_1media_1_1MediaParser_html_a1628c19a91f1b8ae123f7350936bfe32"><div class="ttname"><a href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#a1628c19a91f1b8ae123f7350936bfe32">edash_packager::media::MediaParser::NewSampleCB</a></div><div class="ttdeci">base::Callback&lt; bool(uint32_t track_id, const scoped_refptr&lt; MediaSample &gt; &amp;media_sample)&gt; 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>
<div class="ttc" id="classedash__packager_1_1media_1_1KeySource_html"><div class="ttname"><a href="../../d9/d8b/classedash__packager_1_1media_1_1KeySource.html">edash_packager::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#l00029">key_source.h:29</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1MediaParser_html_af5c74c8723a5306faddcdfdcadb4ab4a"><div class="ttname"><a href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#af5c74c8723a5306faddcdfdcadb4ab4a">edash_packager::media::MediaParser::InitCB</a></div><div class="ttdeci">base::Callback&lt; void(const std::vector&lt; scoped_refptr&lt; StreamInfo &gt; &gt; &amp;stream_info)&gt; InitCB</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d12/media__parser_8h_source.html#l00034">media_parser.h:34</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1ByteQueue_html"><div class="ttname"><a href="../../d8/d2e/classedash__packager_1_1media_1_1ByteQueue.html">edash_packager::media::ByteQueue</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d7/dc6/byte__queue_8h_source.html#l00020">byte_queue.h:20</a></div></div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated on Thu Nov 19 2015 02:12:32 for DASH Media Packaging SDK by &#160;<a href="http://www.doxygen.org/index.html">
<img class="footer" src="../../doxygen.png" alt="doxygen"/>
</a> 1.8.6
</small></address>
</body>
</html>