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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">#include &quot;packager/media/formats/webvtt/text_readers.h&quot;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160; </div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="preprocessor">#include &lt;cstring&gt;</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160; </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#include &quot;packager/base/logging.h&quot;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160; </div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="keyword">namespace </span><a class="code" href="../../d8/daf/namespaceshaka.html">shaka</a> {</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="keyword">namespace </span>media {</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160; </div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;LineReader::LineReader() : should_flush_(false) {}</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160; </div>
<div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="../../db/de2/classshaka_1_1media_1_1LineReader.html#aefbf919837a91de33bac0f14feb25a96"> 18</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="../../db/de2/classshaka_1_1media_1_1LineReader.html#aefbf919837a91de33bac0f14feb25a96">LineReader::PushData</a>(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">size_t</span> data_size) {</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; buffer_.<a class="code" href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#acea792e406efe5119cec2e3e522e02c2">Push</a>(data, <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(data_size));</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; should_flush_ = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;}</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; </div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="comment">// Split lines based on https://w3c.github.io/webvtt/#webvtt-line-terminator</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="../../db/de2/classshaka_1_1media_1_1LineReader.html#ad75892efb765091aabcede75dac10cc3"> 24</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="../../db/de2/classshaka_1_1media_1_1LineReader.html#ad75892efb765091aabcede75dac10cc3">LineReader::Next</a>(std::string* out) {</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; DCHECK(out);</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; </div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; <span class="keywordtype">int</span> skip = 0;</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <span class="keyword">const</span> uint8_t* data;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="keywordtype">int</span> data_size;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; buffer_.<a class="code" href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#a8565a6999f73f210ad2ac2e2ee5ada0e">Peek</a>(&amp;data, &amp;data_size);</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <span class="keywordflow">for</span> (i = 0; i &lt; data_size; i++) {</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; <span class="comment">// Handle \n</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; <span class="keywordflow">if</span> (data[i] == <span class="charliteral">&#39;\n&#39;</span>) {</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; skip = 1;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keywordflow">break</span>;</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; </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="comment">// Handle \r and \r\n</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <span class="keywordflow">if</span> (data[i] == <span class="charliteral">&#39;\r&#39;</span>) {</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="comment">// Only read if we can see the next character; this ensures we don&#39;t get</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="comment">// the &#39;\n&#39; in the next PushData.</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keywordflow">if</span> (i + 1 == data_size) {</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keywordflow">if</span> (!should_flush_)</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; skip = 1;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <span class="keywordflow">if</span> (data[i + 1] == <span class="charliteral">&#39;\n&#39;</span>)</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; skip = 2;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; skip = 1;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; }</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keywordflow">break</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; }</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keywordflow">if</span> (i == data_size &amp;&amp; (!should_flush_ || i == 0)) {</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</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">// TODO(modmaker): Handle character encodings?</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; out-&gt;assign(data, data + i);</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; buffer_.<a class="code" href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#a31b30d39d14fca3ce722b4233de95c79">Pop</a>(i + skip);</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</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; </div>
<div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="../../db/de2/classshaka_1_1media_1_1LineReader.html#a225861ff0be8f69c62a3649ca993e50a"> 67</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="../../db/de2/classshaka_1_1media_1_1LineReader.html#a225861ff0be8f69c62a3649ca993e50a">LineReader::Flush</a>() {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; should_flush_ = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;}</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;BlockReader::BlockReader() : should_flush_(false) {}</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; </div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="../../df/d0d/classshaka_1_1media_1_1BlockReader.html#a3db5ba0a907ab3d9332e8d2eac23c9c8"> 73</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="../../df/d0d/classshaka_1_1media_1_1BlockReader.html#a3db5ba0a907ab3d9332e8d2eac23c9c8">BlockReader::PushData</a>(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">size_t</span> data_size) {</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; source_.<a class="code" href="../../db/de2/classshaka_1_1media_1_1LineReader.html#aefbf919837a91de33bac0f14feb25a96">PushData</a>(data, data_size);</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; should_flush_ = <span class="keyword">false</span>;</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; </div>
<div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="../../df/d0d/classshaka_1_1media_1_1BlockReader.html#aaab26080db4e71f585de85c392c9745d"> 78</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="../../df/d0d/classshaka_1_1media_1_1BlockReader.html#aaab26080db4e71f585de85c392c9745d">BlockReader::Next</a>(std::vector&lt;std::string&gt;* out) {</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; DCHECK(out);</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordtype">bool</span> end_block = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="comment">// Read through lines until a non-empty line is found. With a non-empty</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="comment">// line is found, start adding the lines to the output and once an empty</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="comment">// line if found again, stop adding lines and exit.</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; std::string line;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="keywordflow">while</span> (source_.<a class="code" href="../../db/de2/classshaka_1_1media_1_1LineReader.html#ad75892efb765091aabcede75dac10cc3">Next</a>(&amp;line)) {</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keywordflow">if</span> (!temp_.empty() &amp;&amp; line.empty()) {</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; end_block = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; }</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keywordflow">if</span> (!line.empty()) {</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; temp_.emplace_back(std::move(line));</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; }</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; </div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keywordflow">if</span> (!end_block &amp;&amp; (!should_flush_ || temp_.empty()))</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; </div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; *out = std::move(temp_);</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</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; </div>
<div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="../../df/d0d/classshaka_1_1media_1_1BlockReader.html#a9ea2f0207b36f6adf1314796c701cc9f"> 103</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="../../df/d0d/classshaka_1_1media_1_1BlockReader.html#a9ea2f0207b36f6adf1314796c701cc9f">BlockReader::Flush</a>() {</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; source_.<a class="code" href="../../db/de2/classshaka_1_1media_1_1LineReader.html#a225861ff0be8f69c62a3649ca993e50a">Flush</a>();</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; should_flush_ = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;}</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">// namespace media</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;} <span class="comment">// namespace shaka</span></div>
</div><!-- fragment --></div><!-- contents -->
<div class="ttc" id="aclassshaka_1_1media_1_1ByteQueue_html_a8565a6999f73f210ad2ac2e2ee5ada0e"><div class="ttname"><a href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#a8565a6999f73f210ad2ac2e2ee5ada0e">shaka::media::ByteQueue::Peek</a></div><div class="ttdeci">void Peek(const uint8_t **data, int *size) const</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00062">byte_queue.cc:62</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1BlockReader_html_a9ea2f0207b36f6adf1314796c701cc9f"><div class="ttname"><a href="../../df/d0d/classshaka_1_1media_1_1BlockReader.html#a9ea2f0207b36f6adf1314796c701cc9f">shaka::media::BlockReader::Flush</a></div><div class="ttdeci">void Flush()</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d51/text__readers_8cc_source.html#l00103">text_readers.cc:103</a></div></div>
<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_1media_1_1ByteQueue_html_a31b30d39d14fca3ce722b4233de95c79"><div class="ttname"><a href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#a31b30d39d14fca3ce722b4233de95c79">shaka::media::ByteQueue::Pop</a></div><div class="ttdeci">void Pop(int count)</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00069">byte_queue.cc:69</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1LineReader_html_aefbf919837a91de33bac0f14feb25a96"><div class="ttname"><a href="../../db/de2/classshaka_1_1media_1_1LineReader.html#aefbf919837a91de33bac0f14feb25a96">shaka::media::LineReader::PushData</a></div><div class="ttdeci">void PushData(const uint8_t *data, size_t data_size)</div><div class="ttdoc">Pushes data onto the end of the buffer.</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d51/text__readers_8cc_source.html#l00018">text_readers.cc:18</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1LineReader_html_a225861ff0be8f69c62a3649ca993e50a"><div class="ttname"><a href="../../db/de2/classshaka_1_1media_1_1LineReader.html#a225861ff0be8f69c62a3649ca993e50a">shaka::media::LineReader::Flush</a></div><div class="ttdeci">void Flush()</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d51/text__readers_8cc_source.html#l00067">text_readers.cc:67</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1LineReader_html_ad75892efb765091aabcede75dac10cc3"><div class="ttname"><a href="../../db/de2/classshaka_1_1media_1_1LineReader.html#ad75892efb765091aabcede75dac10cc3">shaka::media::LineReader::Next</a></div><div class="ttdeci">bool Next(std::string *out)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d51/text__readers_8cc_source.html#l00024">text_readers.cc:24</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1BlockReader_html_a3db5ba0a907ab3d9332e8d2eac23c9c8"><div class="ttname"><a href="../../df/d0d/classshaka_1_1media_1_1BlockReader.html#a3db5ba0a907ab3d9332e8d2eac23c9c8">shaka::media::BlockReader::PushData</a></div><div class="ttdeci">void PushData(const uint8_t *data, size_t data_size)</div><div class="ttdoc">Pushes data onto the end of the buffer.</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d51/text__readers_8cc_source.html#l00073">text_readers.cc:73</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1ByteQueue_html_acea792e406efe5119cec2e3e522e02c2"><div class="ttname"><a href="../../d7/dda/classshaka_1_1media_1_1ByteQueue.html#acea792e406efe5119cec2e3e522e02c2">shaka::media::ByteQueue::Push</a></div><div class="ttdeci">void Push(const uint8_t *data, int size)</div><div class="ttdoc">Append new bytes to the end of the queue.</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/df9/byte__queue_8cc_source.html#l00029">byte_queue.cc:29</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1BlockReader_html_aaab26080db4e71f585de85c392c9745d"><div class="ttname"><a href="../../df/d0d/classshaka_1_1media_1_1BlockReader.html#aaab26080db4e71f585de85c392c9745d">shaka::media::BlockReader::Next</a></div><div class="ttdeci">bool Next(std::vector&lt; std::string &gt; *out)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d51/text__readers_8cc_source.html#l00078">text_readers.cc:78</a></div></div>
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