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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">// Copyright 2017 Google Inc. All rights reserved.</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// Use of this source code is governed by a BSD-style</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">// license that can be found in the LICENSE file or at</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment">// https://developers.google.com/open-source/licenses/bsd</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">#ifndef PACKAGER_MEDIA_CHUNKING_CHUNKING_HANDLER_</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define PACKAGER_MEDIA_CHUNKING_CHUNKING_HANDLER_</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="preprocessor">#include &lt;atomic&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="preprocessor">#include &quot;packager/media/base/media_handler.h&quot;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="keyword">namespace </span>shaka {</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="keyword">namespace </span>media {</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"><a class="line" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html"> 17</a></span>&#160;<span class="keyword">struct </span><a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html">ChunkingOptions</a> {</div>
<div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a1cdbde61303f629cc9b4cbcd98f2d711"> 19</a></span>&#160; <span class="keywordtype">double</span> <a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a1cdbde61303f629cc9b4cbcd98f2d711">segment_duration_in_seconds</a> = 0;</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#ac9368f6edb53d9dd90bc128b664a12e5"> 23</a></span>&#160; <span class="keywordtype">double</span> <a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#ac9368f6edb53d9dd90bc128b664a12e5">subsegment_duration_in_seconds</a> = 0;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="line" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a0ae39a9eef9c4adc63916fa594f0fe64"> 27</a></span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a0ae39a9eef9c4adc63916fa594f0fe64">segment_sap_aligned</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a6d9761fdfca7819c94baa23845ce9ad7"> 32</a></span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a6d9761fdfca7819c94baa23845ce9ad7">subsegment_sap_aligned</a> = <span class="keyword">true</span>;</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;</div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html"> 61</a></span>&#160;<span class="keyword">class </span><a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html">ChunkingHandler</a> : <span class="keyword">public</span> <a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html">MediaHandler</a> {</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="keyword">explicit</span> <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html">ChunkingHandler</a>(<span class="keyword">const</span> <a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html">ChunkingOptions</a>&amp; chunking_options);</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; ~<a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html">ChunkingHandler</a>() <span class="keyword">override</span>;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a76a5f4b74da3876cc72f44301c389ebd">InitializeInternal</a>() <span class="keyword">override</span>;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a44c30ffd7c283be2ba4347bda7848633">Process</a>(std::unique_ptr&lt;StreamData&gt; stream_data) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a87d573b0142a7574a6d93cddcbdd92c4">OnFlushRequest</a>(<span class="keywordtype">int</span> input_stream_index) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keyword">friend</span> <span class="keyword">class </span>ChunkingHandlerTest;</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; <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html">ChunkingHandler</a>(<span class="keyword">const</span> <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html">ChunkingHandler</a>&amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html">ChunkingHandler</a>&amp; operator=(<span class="keyword">const</span> <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html">ChunkingHandler</a>&amp;) = <span class="keyword">delete</span>;</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; <span class="comment">// Processes media sample and apply chunking if needed.</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> ProcessMediaSample(<span class="keyword">const</span> <a class="code" href="../../d7/d6d/classshaka_1_1media_1_1MediaSample.html">MediaSample</a>* sample);</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="comment">// Dispatch cached non main stream samples before |timestamp_threshold|.</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> DispatchNonMainSamples(int64_t timestamp_threshold);</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; <span class="comment">// The (sub)segments are aligned and dispatched together.</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> DispatchSegmentInfoForAllStreams();</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> DispatchSubsegmentInfoForAllStreams();</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <span class="keyword">const</span> <a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html">ChunkingOptions</a> chunking_options_;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="comment">// The inputs are expected to come from the same thread.</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; std::atomic&lt;int64_t&gt; thread_id_;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="comment">// The video stream is the main stream; if there is only one stream, it is the</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="comment">// main stream. The chunking is based on the main stream.</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keywordtype">int</span> main_stream_index_ = -1;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="comment">// Segment and subsegment duration in main stream&#39;s time scale.</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; int64_t segment_duration_ = 0;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; int64_t subsegment_duration_ = 0;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="comment">// The streams are expected to be synchronized. Cache non main (video) stream</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="comment">// samples so we can determine whether the next segment should include these</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <span class="comment">// samples. The samples will be dispatched after seeing the next main stream</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; <span class="comment">// sample.</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; std::deque&lt;std::unique_ptr&lt;StreamData&gt;&gt; non_main_samples_;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="comment">// Current segment index, useful to determine where to do chunking.</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; int64_t current_segment_index_ = -1;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="comment">// Current subsegment index, useful to determine where to do chunking.</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; int64_t current_subsegment_index_ = -1;</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; std::vector&lt;std::shared_ptr&lt;SegmentInfo&gt;&gt; segment_info_;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; std::vector&lt;std::shared_ptr&lt;SegmentInfo&gt;&gt; subsegment_info_;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; std::vector&lt;uint32_t&gt; time_scales_;</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; <span class="comment">// The end timestamp of the last dispatched sample.</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; std::vector&lt;int64_t&gt; last_sample_end_timestamps_;</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;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;} <span class="comment">// namespace media</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160;} <span class="comment">// namespace shaka</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;<span class="preprocessor">#endif // PACKAGER_MEDIA_CHUNKING_CHUNKING_HANDLER_</span></div>
<div class="ttc" id="classshaka_1_1media_1_1ChunkingHandler_html_a44c30ffd7c283be2ba4347bda7848633"><div class="ttname"><a href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a44c30ffd7c283be2ba4347bda7848633">shaka::media::ChunkingHandler::Process</a></div><div class="ttdeci">Status Process(std::unique_ptr&lt; StreamData &gt; stream_data) override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d12/chunking__handler_8cc_source.html#l00036">chunking_handler.cc:36</a></div></div>
<div class="ttc" id="structshaka_1_1media_1_1ChunkingOptions_html_a0ae39a9eef9c4adc63916fa594f0fe64"><div class="ttname"><a href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a0ae39a9eef9c4adc63916fa594f0fe64">shaka::media::ChunkingOptions::segment_sap_aligned</a></div><div class="ttdeci">bool segment_sap_aligned</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d79/chunking__handler_8h_source.html#l00027">chunking_handler.h:27</a></div></div>
<div class="ttc" id="classshaka_1_1media_1_1ChunkingHandler_html_a76a5f4b74da3876cc72f44301c389ebd"><div class="ttname"><a href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a76a5f4b74da3876cc72f44301c389ebd">shaka::media::ChunkingHandler::InitializeInternal</a></div><div class="ttdeci">Status InitializeInternal() override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d12/chunking__handler_8cc_source.html#l00028">chunking_handler.cc:28</a></div></div>
<div class="ttc" id="classshaka_1_1media_1_1MediaHandler_html"><div class="ttname"><a href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html">shaka::media::MediaHandler</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d93/media__handler_8h_source.html#l00070">media_handler.h:70</a></div></div>
<div class="ttc" id="structshaka_1_1media_1_1ChunkingOptions_html_ac9368f6edb53d9dd90bc128b664a12e5"><div class="ttname"><a href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#ac9368f6edb53d9dd90bc128b664a12e5">shaka::media::ChunkingOptions::subsegment_duration_in_seconds</a></div><div class="ttdeci">double subsegment_duration_in_seconds</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d79/chunking__handler_8h_source.html#l00023">chunking_handler.h:23</a></div></div>
<div class="ttc" id="classshaka_1_1media_1_1MediaSample_html"><div class="ttname"><a href="../../d7/d6d/classshaka_1_1media_1_1MediaSample.html">shaka::media::MediaSample</a></div><div class="ttdoc">Class to hold a media sample. </div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d80/media__sample_8h_source.html#l00022">media_sample.h:22</a></div></div>
<div class="ttc" id="structshaka_1_1media_1_1ChunkingOptions_html"><div class="ttname"><a href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html">shaka::media::ChunkingOptions</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d79/chunking__handler_8h_source.html#l00017">chunking_handler.h:17</a></div></div>
<div class="ttc" id="classshaka_1_1media_1_1ChunkingHandler_html_a87d573b0142a7574a6d93cddcbdd92c4"><div class="ttname"><a href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a87d573b0142a7574a6d93cddcbdd92c4">shaka::media::ChunkingHandler::OnFlushRequest</a></div><div class="ttdeci">Status OnFlushRequest(int input_stream_index) override</div><div class="ttdoc">Event handler for flush request at the specific input stream index. </div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d12/chunking__handler_8cc_source.html#l00114">chunking_handler.cc:114</a></div></div>
<div class="ttc" id="structshaka_1_1media_1_1ChunkingOptions_html_a1cdbde61303f629cc9b4cbcd98f2d711"><div class="ttname"><a href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a1cdbde61303f629cc9b4cbcd98f2d711">shaka::media::ChunkingOptions::segment_duration_in_seconds</a></div><div class="ttdeci">double segment_duration_in_seconds</div><div class="ttdoc">Segment duration in seconds. </div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d79/chunking__handler_8h_source.html#l00019">chunking_handler.h:19</a></div></div>
<div class="ttc" id="classshaka_1_1media_1_1Status_html"><div class="ttname"><a href="../../d0/d93/classshaka_1_1media_1_1Status.html">shaka::media::Status</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d13/status_8h_source.html#l00085">status.h:85</a></div></div>
<div class="ttc" id="classshaka_1_1media_1_1ChunkingHandler_html"><div class="ttname"><a href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html">shaka::media::ChunkingHandler</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d79/chunking__handler_8h_source.html#l00061">chunking_handler.h:61</a></div></div>
<div class="ttc" id="structshaka_1_1media_1_1ChunkingOptions_html_a6d9761fdfca7819c94baa23845ce9ad7"><div class="ttname"><a href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a6d9761fdfca7819c94baa23845ce9ad7">shaka::media::ChunkingOptions::subsegment_sap_aligned</a></div><div class="ttdeci">bool subsegment_sap_aligned</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d79/chunking__handler_8h_source.html#l00032">chunking_handler.h:32</a></div></div>
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