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<li class="navelem"><a class="el" href="../../dir_3f8eec2fc361645de4b1ec14c19fffc7.html">packager</a></li><li class="navelem"><a class="el" href="../../dir_f99dae54fe7170f791f339b952d5067a.html">media</a></li><li class="navelem"><a class="el" href="../../dir_e3bda0bde998a4d5063328245b9909be.html">base</a></li> </ul>
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<div class="title">text_muxer.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 2020 Google LLC. 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/text_muxer.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/media/base/muxer_util.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "packager/status_macros.h"</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  </div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="keyword">namespace </span><a class="code" href="../../d8/daf/namespaceshaka.html">shaka</a> {</div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  </div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> TextMuxer::TextMuxer(<span class="keyword">const</span> MuxerOptions& options) : Muxer(options) {}</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> TextMuxer::~TextMuxer() {}</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> Status TextMuxer::InitializeMuxer() {</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="keywordflow">if</span> (streams().size() != 1 || streams()[0]->stream_type() != kStreamText) {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keywordflow">return</span> Status(error::MUXER_FAILURE,</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="stringliteral">"Incorrect streams given to WebVTT muxer"</span>);</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  }</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"> 24</span>  <span class="keyword">auto</span> copy = streams()[0]->Clone();</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  RETURN_IF_ERROR(InitializeStream(<span class="keyword">static_cast<</span>TextStreamInfo*<span class="keyword">></span>(copy.get())));</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>  muxer_listener()-><a class="code" href="../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#a31536ec385a7ec22f323a42b872b499a">OnMediaStart</a>(options(), *copy, copy->time_scale(),</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  MuxerListener::kContainerText);</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  last_cue_ms_ = 0;</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keywordflow">return</span> Status::OK;</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> Status TextMuxer::Finalize() {</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> duration_ms = <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(total_duration_ms_);</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordtype">float</span> duration_seconds = duration_ms / 1000;</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>  <span class="comment">// If we haven't seen any segments, this is a single-file. In this case,</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="comment">// flush the single segment.</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  MuxerListener::MediaRanges ranges;</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">if</span> (duration_seconds == 0 && last_cue_ms_ != 0) {</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  DCHECK(options().segment_template.empty());</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  duration_seconds = <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(last_cue_ms_) / 1000;</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  uint64_t size;</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  RETURN_IF_ERROR(WriteToFile(options().output_file_name, &size));</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// Insert a dummy value so the HLS generator will generate a segment list.</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  ranges.subsegment_ranges.emplace_back();</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>  muxer_listener()-><a class="code" href="../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#aaf755e05c40fdadcca6113164f0585c6">OnNewSegment</a>(</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  options().output_file_name, 0,</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  duration_seconds * streams()[0]->time_scale(), size);</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>  muxer_listener()-><a class="code" href="../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#a11d4301cd53ab421f524bfa143eac21a">OnMediaEnd</a>(ranges, duration_seconds);</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> }</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> Status TextMuxer::AddTextSample(<span class="keywordtype">size_t</span> stream_id, <span class="keyword">const</span> TextSample& sample) {</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">// Ignore sync samples.</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">if</span> (sample.body().is_empty()) {</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</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>  RETURN_IF_ERROR(AddTextSampleInternal(sample));</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  </div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  last_cue_ms_ = sample.EndTime();</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> }</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> Status TextMuxer::FinalizeSegment(<span class="keywordtype">size_t</span> stream_id,</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keyword">const</span> SegmentInfo& segment_info) {</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  total_duration_ms_ += segment_info.duration;</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keyword">const</span> std::string& segment_template = options().<a class="code" href="../../d0/d27/structshaka_1_1media_1_1MuxerOptions.html#ab98cfd28046fc5c52ab2a45dba1a339a">segment_template</a>;</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  DCHECK(!segment_template.empty());</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">const</span> uint32_t index = segment_index_++;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keyword">const</span> uint64_t start = segment_info.start_timestamp;</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">const</span> uint64_t duration = segment_info.duration;</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">const</span> uint32_t bandwidth = options().<a class="code" href="../../d0/d27/structshaka_1_1media_1_1MuxerOptions.html#a930587b1f3a3e38cf1e7974f01d8ce1e">bandwidth</a>;</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">const</span> std::string filename =</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  GetSegmentName(segment_template, start, index, bandwidth);</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  uint64_t size;</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  RETURN_IF_ERROR(WriteToFile(filename, &size));</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  </div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  muxer_listener()-><a class="code" href="../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#aaf755e05c40fdadcca6113164f0585c6">OnNewSegment</a>(filename, start, duration, size);</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> Status::OK;</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>  </div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> } <span class="comment">// namespace shaka</span></div>
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</div><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="astructshaka_1_1media_1_1MuxerOptions_html_ab98cfd28046fc5c52ab2a45dba1a339a"><div class="ttname"><a href="../../d0/d27/structshaka_1_1media_1_1MuxerOptions.html#ab98cfd28046fc5c52ab2a45dba1a339a">shaka::media::MuxerOptions::segment_template</a></div><div class="ttdeci">std::string segment_template</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d0e/muxer__options_8h_source.html#l00040">muxer_options.h:40</a></div></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>
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<div class="ttc" id="aclassshaka_1_1media_1_1MuxerListener_html_a11d4301cd53ab421f524bfa143eac21a"><div class="ttname"><a href="../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#a11d4301cd53ab421f524bfa143eac21a">shaka::media::MuxerListener::OnMediaEnd</a></div><div class="ttdeci">virtual void OnMediaEnd(const MediaRanges &media_ranges, float duration_seconds)=0</div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1MuxerListener_html_a31536ec385a7ec22f323a42b872b499a"><div class="ttname"><a href="../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#a31536ec385a7ec22f323a42b872b499a">shaka::media::MuxerListener::OnMediaStart</a></div><div class="ttdeci">virtual void OnMediaStart(const MuxerOptions &muxer_options, const StreamInfo &stream_info, uint32_t time_scale, ContainerType container_type)=0</div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1MuxerListener_html_aaf755e05c40fdadcca6113164f0585c6"><div class="ttname"><a href="../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#aaf755e05c40fdadcca6113164f0585c6">shaka::media::MuxerListener::OnNewSegment</a></div><div class="ttdeci">virtual void OnNewSegment(const std::string &segment_name, int64_t start_time, int64_t duration, uint64_t segment_file_size)=0</div></div>
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<div class="ttc" id="astructshaka_1_1media_1_1MuxerOptions_html_a930587b1f3a3e38cf1e7974f01d8ce1e"><div class="ttname"><a href="../../d0/d27/structshaka_1_1media_1_1MuxerOptions.html#a930587b1f3a3e38cf1e7974f01d8ce1e">shaka::media::MuxerOptions::bandwidth</a></div><div class="ttdeci">uint32_t bandwidth</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d0e/muxer__options_8h_source.html#l00047">muxer_options.h:47</a></div></div>
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