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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_c6ada2450b25ab5438a4dba6c9b890af.html">base</a></li> </ul>
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<div class="title">media_stream.cc</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2014 Google Inc. All rights reserved.</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Use of this source code is governed by a BSD-style</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// license that can be found in the LICENSE file or at</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// https://developers.google.com/open-source/licenses/bsd</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "packager/media/base/media_stream.h"</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "packager/base/logging.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "packager/base/strings/stringprintf.h"</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "packager/media/base/demuxer.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "packager/media/base/media_sample.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "packager/media/base/muxer.h"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "packager/media/base/stream_info.h"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">namespace </span>shaka {</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span>media {</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"><a class="line" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#a86598d6228ab8163d27fb855142c9f73"> 19</a></span> <a class="code" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#a86598d6228ab8163d27fb855142c9f73">MediaStream::MediaStream</a>(scoped_refptr<StreamInfo> info, <a class="code" href="../../dd/d17/classshaka_1_1media_1_1Demuxer.html">Demuxer</a>* demuxer)</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  : info_(info), demuxer_(demuxer), muxer_(NULL), state_(kIdle) {}</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> MediaStream::~MediaStream() {}</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div>
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<div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#ae460a9941a4b85d511126d9a2d596f95"> 24</a></span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#ae460a9941a4b85d511126d9a2d596f95">MediaStream::PullSample</a>(scoped_refptr<MediaSample>* sample) {</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  DCHECK(state_ == kPulling || state_ == kIdle);</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">// Trigger a new parse in demuxer if no more samples.</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keywordflow">while</span> (samples_.empty()) {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> status = demuxer_-><a class="code" href="../../dd/d17/classshaka_1_1media_1_1Demuxer.html#a0f9b7c954ff48c3021467300d755ac29">Parse</a>();</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordflow">if</span> (!status.ok())</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keywordflow">return</span> status;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  }</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  *sample = samples_.front();</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  samples_.pop_front();</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> }</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#ae91f45b0eacab47632f069543b709b58"> 39</a></span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#ae91f45b0eacab47632f069543b709b58">MediaStream::PushSample</a>(<span class="keyword">const</span> scoped_refptr<MediaSample>& sample) {</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keywordflow">switch</span> (state_) {</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">case</span> kIdle:</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">case</span> kPulling:</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  samples_.push_back(sample);</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">case</span> kDisconnected:</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">case</span> kPushing:</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">return</span> muxer_->AddSample(<span class="keyword">this</span>, sample);</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">default</span>:</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  NOTREACHED() << <span class="stringliteral">"Unexpected State "</span> << state_;</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">return</span> Status::UNKNOWN;</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  }</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"><a class="line" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#a98e53e299c7258419623b3d709553562"> 55</a></span> <span class="keywordtype">void</span> <a class="code" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#a98e53e299c7258419623b3d709553562">MediaStream::Connect</a>(<a class="code" href="../../df/d46/classshaka_1_1media_1_1Muxer.html">Muxer</a>* muxer) {</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  DCHECK(muxer);</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  DCHECK(!muxer_);</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  state_ = kConnected;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  muxer_ = muxer;</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> }</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div>
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<div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#af5eca8f2e63e762d52fcc30c5f8c38b0"> 62</a></span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#af5eca8f2e63e762d52fcc30c5f8c38b0">MediaStream::Start</a>(MediaStreamOperation operation) {</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  DCHECK(demuxer_);</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  DCHECK(operation == kPush || operation == kPull);</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">switch</span> (state_) {</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">case</span> kIdle:</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="comment">// Disconnect the stream if it is not connected to a muxer.</span></div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  state_ = kDisconnected;</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  samples_.clear();</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">case</span> kConnected:</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  state_ = (operation == kPush) ? kPushing : kPulling;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">if</span> (operation == kPush) {</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">// Push samples in the queue to muxer if there is any.</span></div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">while</span> (!samples_.empty()) {</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> status = muxer_->AddSample(<span class="keyword">this</span>, samples_.front());</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">if</span> (!status.ok())</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">return</span> status;</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  samples_.pop_front();</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  }</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="comment">// We need to disconnect all its peer streams which are not connected</span></div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">// to a muxer.</span></div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < demuxer_-><a class="code" href="../../dd/d17/classshaka_1_1media_1_1Demuxer.html#aafb74f83b0de2c787336bad9f096ce50">streams</a>().size(); ++i) {</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> status = demuxer_-><a class="code" href="../../dd/d17/classshaka_1_1media_1_1Demuxer.html#aafb74f83b0de2c787336bad9f096ce50">streams</a>()[i]->Start(operation);</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">if</span> (!status.ok())</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span> status;</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>  }</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">case</span> kPulling:</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  DCHECK(operation == kPull);</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">default</span>:</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  NOTREACHED() << <span class="stringliteral">"Unexpected State "</span> << state_;</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">return</span> Status::UNKNOWN;</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</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> </div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="keyword">const</span> scoped_refptr<StreamInfo> MediaStream::info()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> info_; }</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"><a class="line" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#a51d85facae4f9d8d89b97a42148769dd"> 103</a></span> std::string <a class="code" href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#a51d85facae4f9d8d89b97a42148769dd">MediaStream::ToString</a>()<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">return</span> base::StringPrintf(<span class="stringliteral">"state: %d\n samples in the queue: %zu\n %s"</span>,</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  state_, samples_.size(), info_->ToString().c_str());</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> }</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> } <span class="comment">// namespace shaka</span></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaStream_html_ae460a9941a4b85d511126d9a2d596f95"><div class="ttname"><a href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#ae460a9941a4b85d511126d9a2d596f95">shaka::media::MediaStream::PullSample</a></div><div class="ttdeci">Status PullSample(scoped_refptr< MediaSample > *sample)</div><div class="ttdoc">Pull sample from Demuxer (triggered by Muxer). </div><div class="ttdef"><b>Definition:</b> <a href="../../de/d15/media__stream_8cc_source.html#l00024">media_stream.cc:24</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaStream_html_af5eca8f2e63e762d52fcc30c5f8c38b0"><div class="ttname"><a href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#af5eca8f2e63e762d52fcc30c5f8c38b0">shaka::media::MediaStream::Start</a></div><div class="ttdeci">Status Start(MediaStreamOperation operation)</div><div class="ttdoc">Start the stream for pushing or pulling. </div><div class="ttdef"><b>Definition:</b> <a href="../../de/d15/media__stream_8cc_source.html#l00062">media_stream.cc:62</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaStream_html_ae91f45b0eacab47632f069543b709b58"><div class="ttname"><a href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#ae91f45b0eacab47632f069543b709b58">shaka::media::MediaStream::PushSample</a></div><div class="ttdeci">Status PushSample(const scoped_refptr< MediaSample > &sample)</div><div class="ttdoc">Push sample to Muxer (triggered by Demuxer). </div><div class="ttdef"><b>Definition:</b> <a href="../../de/d15/media__stream_8cc_source.html#l00039">media_stream.cc:39</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaStream_html_a86598d6228ab8163d27fb855142c9f73"><div class="ttname"><a href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#a86598d6228ab8163d27fb855142c9f73">shaka::media::MediaStream::MediaStream</a></div><div class="ttdeci">MediaStream(scoped_refptr< StreamInfo > info, Demuxer *demuxer)</div><div class="ttdef"><b>Definition:</b> <a href="../../de/d15/media__stream_8cc_source.html#l00019">media_stream.cc:19</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Demuxer_html_aafb74f83b0de2c787336bad9f096ce50"><div class="ttname"><a href="../../dd/d17/classshaka_1_1media_1_1Demuxer.html#aafb74f83b0de2c787336bad9f096ce50">shaka::media::Demuxer::streams</a></div><div class="ttdeci">const std::vector< std::unique_ptr< MediaStream > > & streams()</div><div class="ttdef"><b>Definition:</b> <a href="../../de/dc1/demuxer_8h_source.html#l00068">demuxer.h:68</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Demuxer_html"><div class="ttname"><a href="../../dd/d17/classshaka_1_1media_1_1Demuxer.html">shaka::media::Demuxer</a></div><div class="ttdef"><b>Definition:</b> <a href="../../de/dc1/demuxer_8h_source.html#l00032">demuxer.h:32</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaStream_html_a98e53e299c7258419623b3d709553562"><div class="ttname"><a href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#a98e53e299c7258419623b3d709553562">shaka::media::MediaStream::Connect</a></div><div class="ttdeci">void Connect(Muxer *muxer)</div><div class="ttdef"><b>Definition:</b> <a href="../../de/d15/media__stream_8cc_source.html#l00055">media_stream.cc:55</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Demuxer_html_a0f9b7c954ff48c3021467300d755ac29"><div class="ttname"><a href="../../dd/d17/classshaka_1_1media_1_1Demuxer.html#a0f9b7c954ff48c3021467300d755ac29">shaka::media::Demuxer::Parse</a></div><div class="ttdeci">Status Parse()</div><div class="ttdoc">Read from the source and send it to the parser. </div><div class="ttdef"><b>Definition:</b> <a href="../../d3/dbe/demuxer_8cc_source.html#l00197">demuxer.cc:197</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Muxer_html"><div class="ttname"><a href="../../df/d46/classshaka_1_1media_1_1Muxer.html">shaka::media::Muxer</a></div><div class="ttdef"><b>Definition:</b> <a href="../../db/df6/muxer_8h_source.html#l00033">muxer.h:33</a></div></div>
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<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#l00075">status.h:75</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaStream_html_a51d85facae4f9d8d89b97a42148769dd"><div class="ttname"><a href="../../d8/d5c/classshaka_1_1media_1_1MediaStream.html#a51d85facae4f9d8d89b97a42148769dd">shaka::media::MediaStream::ToString</a></div><div class="ttdeci">std::string ToString() const </div><div class="ttdef"><b>Definition:</b> <a href="../../de/d15/media__stream_8cc_source.html#l00103">media_stream.cc:103</a></div></div>
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