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<div class="title">es_parser_h26x.h</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">#ifndef MEDIA_FORMATS_MP2T_ES_PARSER_H26x_H_</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor"></span><span class="preprocessor">#define MEDIA_FORMATS_MP2T_ES_PARSER_H26x_H_</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <stdint.h></span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <deque></span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <list></span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <memory></span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "packager/base/callback.h"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "packager/base/compiler_specific.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/codecs/nalu_reader.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/mp2t/es_parser.h"</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span>shaka {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">class </span>H26xByteToUnitStreamConverter;</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">class </span>OffsetByteQueue;</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">namespace </span>mp2t {</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">// A base class for common code between the H.264/H.265 es parsers.</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="../../da/d23/classshaka_1_1media_1_1mp2t_1_1EsParserH26x.html"> 28</a></span> <span class="keyword">class </span><a class="code" href="../../da/d23/classshaka_1_1media_1_1mp2t_1_1EsParserH26x.html">EsParserH26x</a> : <span class="keyword">public</span> <a class="code" href="../../da/d10/classshaka_1_1media_1_1mp2t_1_1EsParser.html">EsParser</a> {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <a class="code" href="../../da/d23/classshaka_1_1media_1_1mp2t_1_1EsParserH26x.html">EsParserH26x</a>(Nalu::CodecType type,</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  std::unique_ptr<H26xByteToUnitStreamConverter> stream_converter,</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  uint32_t pid,</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">const</span> EmitSampleCB& emit_sample_cb);</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  ~<a class="code" href="../../da/d23/classshaka_1_1media_1_1mp2t_1_1EsParserH26x.html">EsParserH26x</a>() <span class="keyword">override</span>;</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>  <span class="comment">// EsParser implementation overrides.</span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordtype">bool</span> Parse(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size, int64_t pts, int64_t dts) <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordtype">void</span> Flush() <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordtype">void</span> Reset() <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">protected</span>:</div>
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<div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="../../d8/dc2/structshaka_1_1media_1_1mp2t_1_1EsParserH26x_1_1VideoSliceInfo.html"> 42</a></span>  <span class="keyword">struct </span><a class="code" href="../../d8/dc2/structshaka_1_1media_1_1mp2t_1_1EsParserH26x_1_1VideoSliceInfo.html">VideoSliceInfo</a> {</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">bool</span> valid = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordtype">bool</span> is_key_frame = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// Both pps_id and frame_num are extracted from slice header (frame_num is</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// only for H.264).</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordtype">int</span> pps_id = 0;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordtype">int</span> frame_num = 0;</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  };</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keyword">const</span> <a class="code" href="../../de/dea/classshaka_1_1media_1_1H26xByteToUnitStreamConverter.html">H26xByteToUnitStreamConverter</a>* stream_converter()<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">return</span> stream_converter_.get();</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  }</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>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">struct </span>TimingDesc {</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  int64_t dts;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  int64_t pts;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  };</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">struct </span>NaluInfo {</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">// NOTE: Nalu does not own the memory pointed by its data pointers. The</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">// caller owns and maintains the memory.</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html">Nalu</a> nalu;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// The offset of the NALU from the beginning of the stream, usable as an</span></div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="comment">// argument to OffsetByteQueue. This points to the start code.</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  uint64_t position = 0;</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  uint8_t start_code_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> </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="comment">// Processes a NAL unit found in ParseInternal. |video_slice_info| should not</span></div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="comment">// be null, it will contain the video slice info if it is a video slice nalu</span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">// and it is processed successfully; otherwise the |valid| member will be set</span></div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="comment">// to false with other members untouched.</span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> ProcessNalu(<span class="keyword">const</span> Nalu& nalu,</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  VideoSliceInfo* video_slice_info) = 0;</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="comment">// Update the video decoder config.</span></div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">// Return true if successful.</span></div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> UpdateVideoDecoderConfig(<span class="keywordtype">int</span> pps_id) = 0;</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="comment">// Finds the NAL unit by finding the next start code. This will modify the</span></div>
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|
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">// search position.</span></div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="comment">// Returns true when it has found the NALU.</span></div>
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|
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordtype">bool</span> SearchForNalu(uint64_t* position, Nalu* nalu);</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="comment">// Resumes the H26x ES parsing.</span></div>
|
|
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">// Return true if successful.</span></div>
|
|
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordtype">bool</span> ParseInternal();</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>  <span class="comment">// Emit the current access unit if exists.</span></div>
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|
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordtype">bool</span> EmitCurrentAccessUnit();</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// Emit a frame whose position in the ES queue starts at |access_unit_pos|.</span></div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="comment">// Returns true if successful, false if no PTS is available for the frame.</span></div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordtype">bool</span> EmitFrame(int64_t access_unit_pos,</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordtype">int</span> access_unit_size,</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordtype">bool</span> is_key_frame,</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordtype">int</span> pps_id);</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>  <span class="comment">// Callback to pass the frames.</span></div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  EmitSampleCB emit_sample_cb_;</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>  <span class="comment">// The type of stream being parsed.</span></div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  Nalu::CodecType type_;</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">// Bytes of the ES stream that have not been emitted yet.</span></div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  std::unique_ptr<media::OffsetByteQueue> es_queue_;</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  std::list<std::pair<int64_t, TimingDesc>> timing_desc_list_;</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="comment">// Parser state.</span></div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="comment">// The position of the search head.</span></div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  uint64_t current_search_position_ = 0;</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="comment">// Current access unit starting position.</span></div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  uint64_t current_access_unit_position_ = 0;</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="comment">// The VideoSliceInfo in the current access unit, useful for first vcl nalu</span></div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="comment">// detection (for H.264).</span></div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  VideoSliceInfo current_video_slice_info_;</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordtype">bool</span> next_access_unit_position_set_ = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  uint64_t next_access_unit_position_ = 0;</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="comment">// Current nalu information.</span></div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  std::unique_ptr<NaluInfo> current_nalu_info_;</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="comment">// This is really a temporary storage for the next nalu information.</span></div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  std::unique_ptr<NaluInfo> next_nalu_info_;</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="comment">// Filter to convert H.264/H.265 Annex B byte stream to unit stream.</span></div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  std::unique_ptr<H26xByteToUnitStreamConverter> stream_converter_;</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="comment">// Frame for which we do not yet have a duration.</span></div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  std::shared_ptr<MediaSample> pending_sample_;</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  uint64_t pending_sample_duration_ = 0;</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="comment">// Indicates whether waiting for first key frame.</span></div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordtype">bool</span> waiting_for_key_frame_ = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> };</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> } <span class="comment">// namespace mp2t</span></div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> } <span class="comment">// namespace shaka</span></div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="preprocessor">#endif</span></div>
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<div class="ttc" id="structshaka_1_1media_1_1mp2t_1_1EsParserH26x_1_1VideoSliceInfo_html"><div class="ttname"><a href="../../d8/dc2/structshaka_1_1media_1_1mp2t_1_1EsParserH26x_1_1VideoSliceInfo.html">shaka::media::mp2t::EsParserH26x::VideoSliceInfo</a></div><div class="ttdef"><b>Definition:</b> <a href="../../df/d8d/es__parser__h26x_8h_source.html#l00042">es_parser_h26x.h:42</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1EsParserH26x_html"><div class="ttname"><a href="../../da/d23/classshaka_1_1media_1_1mp2t_1_1EsParserH26x.html">shaka::media::mp2t::EsParserH26x</a></div><div class="ttdef"><b>Definition:</b> <a href="../../df/d8d/es__parser__h26x_8h_source.html#l00028">es_parser_h26x.h:28</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1H26xByteToUnitStreamConverter_html"><div class="ttname"><a href="../../de/dea/classshaka_1_1media_1_1H26xByteToUnitStreamConverter.html">shaka::media::H26xByteToUnitStreamConverter</a></div><div class="ttdoc">A base class that is used to convert H.26x byte streams to NAL unit streams. </div><div class="ttdef"><b>Definition:</b> <a href="../../db/d31/h26x__byte__to__unit__stream__converter_8h_source.html#l00023">h26x_byte_to_unit_stream_converter.h:23</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Nalu_html"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html">shaka::media::Nalu</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d87/nalu__reader_8h_source.html#l00026">nalu_reader.h:26</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1EsParser_html"><div class="ttname"><a href="../../da/d10/classshaka_1_1media_1_1mp2t_1_1EsParser.html">shaka::media::mp2t::EsParser</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d2/deb/es__parser_8h_source.html#l00020">es_parser.h:20</a></div></div>
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