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<div class="title">webvtt_media_parser.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 2015 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/formats/webvtt/webvtt_media_parser.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 <string></span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <vector></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="preprocessor">#include "packager/base/logging.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "packager/base/strings/string_number_conversions.h"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "packager/base/strings/string_split.h"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "packager/base/strings/string_util.h"</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "packager/media/base/macros.h"</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "packager/media/base/media_sample.h"</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "packager/media/base/text_stream_info.h"</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include "packager/media/formats/webvtt/webvtt_timestamp.h"</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>shaka {</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">namespace </span>media {</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">namespace </span>{</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> kFlush = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">// There's only one track in a WebVTT file.</span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">const</span> <span class="keywordtype">int</span> kTrackId = 0;</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">const</span> <span class="keywordtype">char</span> kCR = 0x0D;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">const</span> <span class="keywordtype">char</span> kLF = 0x0A;</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> <span class="comment">// Reads the first line from |data| and removes the line. Returns false if there</span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">// isn't a line break. Sets |line| with the content of the first line without</span></div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// the line break.</span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keywordtype">bool</span> ReadLine(std::string* data, std::string* line) {</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">if</span> (data->size() == 0) {</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  }</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">size_t</span> string_position = 0;</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">// Length of the line break mark. 1 for LF and CR, 2 for CRLF.</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">int</span> line_break_length = 1;</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordtype">bool</span> found_line_break = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">while</span> (string_position < data->size()) {</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">if</span> (data->at(string_position) == kLF) {</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  found_line_break = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">break</span>;</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> </div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">if</span> (data->at(string_position) == kCR) {</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  found_line_break = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">if</span> (string_position + 1 >= data->size())</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">if</span> (data->at(string_position + 1) == kLF)</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  line_break_length = 2;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">break</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> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  ++string_position;</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  }</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">if</span> (!found_line_break)</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  *line = data->substr(0, string_position);</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  data->erase(0, string_position + line_break_length);</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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> <span class="comment">// Clears |settings| and 0s |start_time| and |duration| regardless of the</span></div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment">// parsing result.</span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="keywordtype">bool</span> ParseTimingAndSettingsLine(<span class="keyword">const</span> std::string& line,</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  uint64_t* start_time,</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  uint64_t* duration,</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  std::string* settings) {</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  *start_time = 0;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  *duration = 0;</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  settings->clear();</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  std::vector<std::string> entries = base::SplitString(</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  line, <span class="stringliteral">" "</span>, base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">if</span> (entries.size() < 3) {</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">// The timing is time1 --> time3 so if there aren't 3 entries, this is parse</span></div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="comment">// error.</span></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  LOG(ERROR) << <span class="stringliteral">"Not enough tokens to be a timing "</span> << line;</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</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>  <span class="keywordflow">if</span> (entries[1] != <span class="stringliteral">"-->"</span>) {</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  LOG(ERROR) << <span class="stringliteral">"Cannot find an arrow at the right place "</span> << line;</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">const</span> std::string& start_time_str = entries[0];</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">if</span> (!WebVttTimestampParse(start_time_str, start_time)) {</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  LOG(ERROR) << <span class="stringliteral">"Failed to parse "</span> << start_time_str << <span class="stringliteral">" in "</span> << line;</div>
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|
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">return</span> <span class="keyword">false</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> std::string& end_time_str = entries[2];</div>
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|
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  uint64_t end_time = 0;</div>
|
|
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">if</span> (!WebVttTimestampParse(end_time_str, &end_time)) {</div>
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|
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  LOG(ERROR) << <span class="stringliteral">"Failed to parse "</span> << end_time_str << <span class="stringliteral">" in "</span> << line;</div>
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|
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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>  *duration = end_time - *start_time;</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  entries.erase(entries.begin(), entries.begin() + 3);</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  *settings = base::JoinString(entries, <span class="stringliteral">" "</span>);</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> }</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> } <span class="comment">// namespace</span></div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> WebVttMediaParser::WebVttMediaParser()</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  : state_(kHeader), sample_converter_(new WebVttSampleConverter()) {}</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> WebVttMediaParser::~WebVttMediaParser() {}</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div>
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<div class="line"><a name="l00120"></a><span class="lineno"><a class="line" href="../../dc/df2/classshaka_1_1media_1_1WebVttMediaParser.html#af6c0fb7de806cccd0e1f9dd92b5310f3"> 120</a></span> <span class="keywordtype">void</span> <a class="code" href="../../dc/df2/classshaka_1_1media_1_1WebVttMediaParser.html#af6c0fb7de806cccd0e1f9dd92b5310f3">WebVttMediaParser::Init</a>(<span class="keyword">const</span> InitCB& init_cb,</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">const</span> <a class="code" href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#a3a1f87fb3ed95a9cbd2b6873326a1a4c">NewSampleCB</a>& new_sample_cb,</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <a class="code" href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html">KeySource</a>* decryption_key_source) {</div>
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|
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  init_cb_ = init_cb;</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  new_sample_cb_ = new_sample_cb;</div>
|
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> }</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div>
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<div class="line"><a name="l00127"></a><span class="lineno"><a class="line" href="../../dc/df2/classshaka_1_1media_1_1WebVttMediaParser.html#aa666cb1b9ee2ff940d9fc7efda4b50d7"> 127</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../dc/df2/classshaka_1_1media_1_1WebVttMediaParser.html#aa666cb1b9ee2ff940d9fc7efda4b50d7">WebVttMediaParser::Flush</a>() {</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="comment">// If not in one of these states just be ready for more data.</span></div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">if</span> (state_ != kCuePayload && state_ != kComment)</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">if</span> (!data_.empty()) {</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="comment">// If it was in the middle of the payload and the stream finished, then this</span></div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="comment">// is an end of the payload. The rest of the data is part of the payload.</span></div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">if</span> (state_ == kCuePayload) {</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  current_cue_.payload += data_ + <span class="stringliteral">"\n"</span>;</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  current_cue_.comment += data_ + <span class="stringliteral">"\n"</span>;</div>
|
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  }</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  data_.clear();</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  }</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">if</span> (!ProcessCurrentCue(kFlush)) {</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  state_ = kParseError;</div>
|
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  }</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  state_ = kCueIdentifierOrTimingOrComment;</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> }</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> </div>
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<div class="line"><a name="l00152"></a><span class="lineno"><a class="line" href="../../dc/df2/classshaka_1_1media_1_1WebVttMediaParser.html#a5295c061b251726d1525cefc091101a2"> 152</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../dc/df2/classshaka_1_1media_1_1WebVttMediaParser.html#a5295c061b251726d1525cefc091101a2">WebVttMediaParser::Parse</a>(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size) {</div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">if</span> (state_ == kParseError) {</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  LOG(WARNING) << <span class="stringliteral">"The parser is in an error state, ignoring input."</span>;</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  data_.insert(data_.end(), buf, buf + size);</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  std::string line;</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">while</span> (ReadLine(&data_, &line)) {</div>
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|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="comment">// Only kCueIdentifierOrTimingOrComment and kCueTiming states accept -->.</span></div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="comment">// Error otherwise.</span></div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_arrow = line.find(<span class="stringliteral">"-->"</span>) != std::string::npos;</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordflow">if</span> (state_ == kCueTiming) {</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">if</span> (!has_arrow) {</div>
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|
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  LOG(ERROR) << <span class="stringliteral">"Expected --> in: "</span> << line;</div>
|
|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  state_ = kParseError;</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  }</div>
|
|
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (state_ != kCueIdentifierOrTimingOrComment) {</div>
|
|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">if</span> (has_arrow) {</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  LOG(ERROR) << <span class="stringliteral">"Unexpected --> in "</span> << line;</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  state_ = kParseError;</div>
|
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  }</div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">switch</span> (state_) {</div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">case</span> kHeader:</div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="comment">// No check. This should be WEBVTT when this object was created.</span></div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  header_.push_back(line);</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  state_ = kMetadata;</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">case</span> kMetadata: {</div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">if</span> (line.empty()) {</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  std::vector<std::shared_ptr<StreamInfo>> streams;</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="comment">// The resolution of timings are in milliseconds.</span></div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> kTimescale = 1000;</div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="comment">// The duration passed here is not very important. Also the whole file</span></div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="comment">// must be read before determining the real duration which doesn't</span></div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="comment">// work nicely with the current demuxer.</span></div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> kDuration = 0;</div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> </div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">// There is no one metadata to determine what the language is. Parts</span></div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="comment">// of the text may be annotated as some specific language.</span></div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> kLanguage[] = <span class="stringliteral">""</span>;</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> </div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> kWebVttCodecString[] = <span class="stringliteral">"wvtt"</span>;</div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  streams.emplace_back(</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keyword">new</span> <a class="code" href="../../db/dab/classshaka_1_1media_1_1TextStreamInfo.html">TextStreamInfo</a>(kTrackId, kTimescale, kDuration,</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  kCodecWebVtt, kWebVttCodecString,</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  base::JoinString(header_, <span class="stringliteral">"\n"</span>),</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  0, <span class="comment">// Not necessary.</span></div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  0,</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  kLanguage)); <span class="comment">// Not necessary.</span></div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  init_cb_.Run(streams);</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  state_ = kCueIdentifierOrTimingOrComment;</div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  }</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  header_.push_back(line);</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  }</div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">case</span> kCueIdentifierOrTimingOrComment: {</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="comment">// Note that there can be one or more line breaks before a cue starts;</span></div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="comment">// skip this line.</span></div>
|
|
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="comment">// Or the file could end without a new cue.</span></div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">if</span> (line.empty())</div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> </div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">if</span> (!has_arrow) {</div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">if</span> (base::StartsWith(line, <span class="stringliteral">"NOTE"</span>,</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  base::CompareCase::INSENSITIVE_ASCII)) {</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  state_ = kComment;</div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  current_cue_.comment += line + <span class="stringliteral">"\n"</span>;</div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="comment">// A cue can start from a cue identifier.</span></div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="comment">// https://w3c.github.io/webvtt/#webvtt-cue-identifier</span></div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  current_cue_.identifier = line;</div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="comment">// The next line must be a timing.</span></div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  state_ = kCueTiming;</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  }</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  }</div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="comment">// No break statement if the line has an arrow; it should be a WebVTT</span></div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="comment">// timing, so fall thru. Setting state_ to kCueTiming so that the state</span></div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="comment">// always matches the case.</span></div>
|
|
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  state_ = kCueTiming;</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  FALLTHROUGH_INTENDED;</div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  }</div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">case</span> kCueTiming: {</div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  DCHECK(has_arrow);</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">if</span> (!ParseTimingAndSettingsLine(line, &current_cue_.start_time,</div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  &current_cue_.duration,</div>
|
|
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  &current_cue_.settings)) {</div>
|
|
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  state_ = kParseError;</div>
|
|
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  }</div>
|
|
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  state_ = kCuePayload;</div>
|
|
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  }</div>
|
|
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordflow">case</span> kCuePayload: {</div>
|
|
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">if</span> (line.empty()) {</div>
|
|
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  state_ = kCueIdentifierOrTimingOrComment;</div>
|
|
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">if</span> (!ProcessCurrentCue(!kFlush)) {</div>
|
|
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  state_ = kParseError;</div>
|
|
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  }</div>
|
|
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  }</div>
|
|
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div>
|
|
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  current_cue_.payload += line + <span class="stringliteral">"\n"</span>;</div>
|
|
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  }</div>
|
|
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">case</span> kComment: {</div>
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<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">if</span> (line.empty()) {</div>
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  state_ = kCueIdentifierOrTimingOrComment;</div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">if</span> (!ProcessCurrentCue(!kFlush)) {</div>
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  state_ = kParseError;</div>
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  }</div>
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  }</div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  current_cue_.comment += line + <span class="stringliteral">"\n"</span>;</div>
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  }</div>
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<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">case</span> kParseError:</div>
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<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  NOTREACHED();</div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  }</div>
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  }</div>
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<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> </div>
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> }</div>
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> </div>
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<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="keywordtype">void</span> WebVttMediaParser::InjectWebVttSampleConvertForTesting(</div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  std::unique_ptr<WebVttSampleConverter> converter) {</div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  sample_converter_ = std::move(converter);</div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> }</div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> </div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="keywordtype">bool</span> WebVttMediaParser::ProcessCurrentCue(<span class="keywordtype">bool</span> flush) {</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  sample_converter_->PushCue(current_cue_);</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  current_cue_ = Cue();</div>
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordflow">if</span> (flush)</div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  sample_converter_->Flush();</div>
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<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> </div>
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<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordflow">while</span> (sample_converter_->ReadySamplesSize() > 0) {</div>
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<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">if</span> (!new_sample_cb_.Run(kTrackId, sample_converter_->PopSample())) {</div>
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<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  LOG(ERROR) << <span class="stringliteral">"New sample callback failed."</span>;</div>
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  }</div>
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<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  }</div>
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<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> }</div>
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> </div>
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<div class="line"><a name="l00311"></a><span class="lineno"> 311</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> } <span class="comment">// namespace shaka</span></div>
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<div class="ttc" id="classshaka_1_1media_1_1WebVttMediaParser_html_af6c0fb7de806cccd0e1f9dd92b5310f3"><div class="ttname"><a href="../../dc/df2/classshaka_1_1media_1_1WebVttMediaParser.html#af6c0fb7de806cccd0e1f9dd92b5310f3">shaka::media::WebVttMediaParser::Init</a></div><div class="ttdeci">void Init(const InitCB &init_cb, const NewSampleCB &new_sample_cb, KeySource *decryption_key_source) override</div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d2f/webvtt__media__parser_8cc_source.html#l00120">webvtt_media_parser.cc:120</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaParser_html_a3a1f87fb3ed95a9cbd2b6873326a1a4c"><div class="ttname"><a href="../../d3/d0a/classshaka_1_1media_1_1MediaParser.html#a3a1f87fb3ed95a9cbd2b6873326a1a4c">shaka::media::MediaParser::NewSampleCB</a></div><div class="ttdeci">base::Callback< bool(uint32_t track_id, const std::shared_ptr< MediaSample > &media_sample)> NewSampleCB</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d12/media__parser_8h_source.html#l00043">media_parser.h:43</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1WebVttMediaParser_html_a5295c061b251726d1525cefc091101a2"><div class="ttname"><a href="../../dc/df2/classshaka_1_1media_1_1WebVttMediaParser.html#a5295c061b251726d1525cefc091101a2">shaka::media::WebVttMediaParser::Parse</a></div><div class="ttdeci">bool Parse(const uint8_t *buf, int size) override WARN_UNUSED_RESULT</div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d2f/webvtt__media__parser_8cc_source.html#l00152">webvtt_media_parser.cc:152</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1WebVttMediaParser_html_aa666cb1b9ee2ff940d9fc7efda4b50d7"><div class="ttname"><a href="../../dc/df2/classshaka_1_1media_1_1WebVttMediaParser.html#aa666cb1b9ee2ff940d9fc7efda4b50d7">shaka::media::WebVttMediaParser::Flush</a></div><div class="ttdeci">bool Flush() override WARN_UNUSED_RESULT</div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d2f/webvtt__media__parser_8cc_source.html#l00127">webvtt_media_parser.cc:127</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1KeySource_html"><div class="ttname"><a href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html">shaka::media::KeySource</a></div><div class="ttdoc">KeySource is responsible for encryption key acquisition. </div><div class="ttdef"><b>Definition:</b> <a href="../../dc/d3f/key__source_8h_source.html#l00045">key_source.h:45</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1TextStreamInfo_html"><div class="ttname"><a href="../../db/dab/classshaka_1_1media_1_1TextStreamInfo.html">shaka::media::TextStreamInfo</a></div><div class="ttdef"><b>Definition:</b> <a href="../../da/d2a/text__stream__info_8h_source.html#l00017">text_stream_info.h:17</a></div></div>
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