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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_TEXT_CHUNKER_H_</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="preprocessor">#define PACKAGER_MEDIA_CHUNKING_TEXT_CHUNKER_H_</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;list&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><a class="code" href="../../d8/daf/namespaceshaka.html">shaka</a> {</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"> 17</span>&#160;<span class="comment">// Media handler for taking a single stream of text samples and inserting</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment">// segment info based on a fixed segment duration and on cue events. The</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="comment">// only time a segment&#39;s duration will not match the fixed segment duration</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment">// is when a cue event is seen.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="../../d5/d3e/classshaka_1_1media_1_1TextChunker.html"> 21</a></span>&#160;<span class="keyword">class </span><a class="code" href="../../d5/d3e/classshaka_1_1media_1_1TextChunker.html">TextChunker</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="l00022"></a><span class="lineno"> 22</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; <span class="keyword">explicit</span> <a class="code" href="../../d5/d3e/classshaka_1_1media_1_1TextChunker.html">TextChunker</a>(<span class="keywordtype">double</span> segment_duration_in_seconds);</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <a class="code" href="../../d5/d3e/classshaka_1_1media_1_1TextChunker.html">TextChunker</a>(<span class="keyword">const</span> <a class="code" href="../../d5/d3e/classshaka_1_1media_1_1TextChunker.html">TextChunker</a>&amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <a class="code" href="../../d5/d3e/classshaka_1_1media_1_1TextChunker.html">TextChunker</a>&amp; operator=(<span class="keyword">const</span> <a class="code" href="../../d5/d3e/classshaka_1_1media_1_1TextChunker.html">TextChunker</a>&amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> InitializeInternal()<span class="keyword"> override </span>{ <span class="keywordflow">return</span> Status::OK; }</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; </div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> Process(std::unique_ptr&lt;StreamData&gt; stream_data) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> OnFlushRequest(<span class="keywordtype">size_t</span> input_stream_index) <span class="keyword">override</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; <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> OnStreamInfo(std::shared_ptr&lt;const StreamInfo&gt; info);</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> OnCueEvent(std::shared_ptr&lt;const CueEvent&gt; cue);</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> OnTextSample(std::shared_ptr&lt;const TextSample&gt; sample);</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="comment">// This does two things that should always happen together:</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="comment">// 1. Dispatch all the samples and a segment info for the time range</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <span class="comment">// segment_start_ to segment_start_ + duration</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="comment">// 2. Set the next segment to start at segment_start_ + duration and</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="comment">// remove all samples that don&#39;t last into that segment.</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> DispatchSegment(int64_t duration);</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; int64_t ScaleTime(<span class="keywordtype">double</span> seconds) <span class="keyword">const</span>;</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="keywordtype">double</span> segment_duration_in_seconds_;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; int64_t time_scale_ = -1; <span class="comment">// Set in OnStreamInfo</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; </div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="comment">// Time values are in scaled units.</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; int64_t segment_start_ = -1; <span class="comment">// Set when the first sample comes in.</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; int64_t segment_duration_ = -1; <span class="comment">// Set in OnStreamInfo.</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="comment">// All samples that make up the current segment. We must store the samples</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="comment">// until the segment ends because a cue event may end the segment sooner</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="comment">// than we expected.</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; std::list&lt;std::shared_ptr&lt;const TextSample&gt;&gt; samples_in_current_segment_;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;};</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;} <span class="comment">// namespace media</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;} <span class="comment">// namespace shaka</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;<span class="preprocessor">#endif // PACKAGER_MEDIA_CHUNKING_TEXT_CHUNKER_H_</span></div>
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<div class="ttc" id="anamespaceshaka_html"><div class="ttname"><a href="../../d8/daf/namespaceshaka.html">shaka</a></div><div class="ttdoc">All the methods that are virtual are virtual for mocking.</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d15/gflags__hex__bytes_8cc_source.html#l00011">gflags_hex_bytes.cc:11</a></div></div>
<div class="ttc" id="aclassshaka_1_1Status_html"><div class="ttname"><a href="../../d2/d20/classshaka_1_1Status.html">shaka::Status</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d13/status_8h_source.html#l00110">status.h:110</a></div></div>
<div class="ttc" id="aclassshaka_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#l00154">media_handler.h:154</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1TextChunker_html"><div class="ttname"><a href="../../d5/d3e/classshaka_1_1media_1_1TextChunker.html">shaka::media::TextChunker</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d1d/text__chunker_8h_source.html#l00021">text_chunker.h:21</a></div></div>
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