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<div class="title">dvb_sub_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 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/formats/dvb/dvb_sub_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 <algorithm></span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  </div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "packager/base/logging.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "packager/media/formats/mp2t/mp2t_common.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</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="l00015"></a><span class="lineno"> 15</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span>{</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  </div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> RgbaColor ConvertYuv(uint8_t Y, uint8_t Cr, uint8_t Cb, uint8_t T) {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="comment">// Converts based on ITU-R BT.601.</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="comment">// See https://en.wikipedia.org/wiki/YCbCr</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="comment">// Note that the T value should be interpolated based on a full transparency</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="comment">// being 256. This means that T=255 should not be fully transparent. Y=0 is</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="comment">// used to signal full transparency.</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="comment">// Values for Y<16 (except Y=0) are invalid, so clamp to 16.</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  RgbaColor color;</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> y_transform = 255.0 / 219 * (std::max<uint8_t>(Y, 16) - 16);</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">double</span> cb_transform = 255.0 / 244 * 1.772 * (Cb - 128);</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> cr_transform = 255.0 / 244 * 1.402 * (Cr - 128);</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">double</span> f1 = 0.114 / 0.587;</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">double</span> f2 = 0.299 / 0.587;</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  color.r = <span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(y_transform + cr_transform);</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  color.g =</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(y_transform - cb_transform * f1 - cr_transform * f2);</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  color.b = <span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(y_transform + cb_transform);</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  color.a = Y == 0 ? 0 : (T == 0 ? 255 : 256 - T);</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">return</span> color;</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</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="comment">// namespace</span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  </div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> DvbSubParser::DvbSubParser() : last_pts_(0), timeout_(0) {}</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> DvbSubParser::~DvbSubParser() {}</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  </div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keywordtype">bool</span> DvbSubParser::Parse(DvbSubSegmentType segment_type,</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  int64_t pts,</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">const</span> uint8_t* payload,</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">size_t</span> size,</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  std::vector<std::shared_ptr<TextSample>>* samples) {</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">switch</span> (segment_type) {</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">case</span> DvbSubSegmentType::kPageComposition:</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">return</span> ParsePageComposition(pts, payload, size, samples);</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">case</span> DvbSubSegmentType::kRegionComposition:</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">return</span> ParseRegionComposition(payload, size);</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">case</span> DvbSubSegmentType::kClutDefinition:</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">return</span> ParseClutDefinition(payload, size);</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">case</span> DvbSubSegmentType::kObjectData:</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">return</span> ParseObjectData(pts, payload, size);</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">case</span> DvbSubSegmentType::kDisplayDefinition:</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">return</span> ParseDisplayDefinition(payload, size);</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">case</span> DvbSubSegmentType::kEndOfDisplay:</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// This signals all the current objects are available. But we need to</span></div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="comment">// know the end time, so we do nothing for now.</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">default</span>:</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  LOG(WARNING) << <span class="stringliteral">"Unknown DVB-sub segment_type=0x"</span> << std::hex</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  << <span class="keyword">static_cast<</span>uint32_t<span class="keyword">></span>(segment_type);</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">return</span> <span class="keyword">true</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> }</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  </div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="keywordtype">bool</span> DvbSubParser::Flush(std::vector<std::shared_ptr<TextSample>>* samples) {</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  RCHECK(composer_.GetSamples(last_pts_, last_pts_ + timeout_ * kMpeg2Timescale,</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  samples));</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  composer_.ClearObjects();</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> }</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="keyword">const</span> DvbImageColorSpace* DvbSubParser::GetColorSpace(uint8_t clut_id) {</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">return</span> composer_.GetColorSpace(clut_id);</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> }</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  </div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">const</span> DvbImageBuilder* DvbSubParser::GetImageForObject(uint16_t object_id) {</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">return</span> composer_.GetObjectImage(object_id);</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>  </div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keywordtype">bool</span> DvbSubParser::ParsePageComposition(</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  int64_t pts,</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">const</span> uint8_t* data,</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordtype">size_t</span> size,</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  std::vector<std::shared_ptr<TextSample>>* samples) {</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="comment">// See ETSI EN 300 743 Section 7.2.2.</span></div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  BitReader reader(data, size);</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  uint8_t page_state;</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  RCHECK(reader.ReadBits(8, &timeout_));</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  RCHECK(reader.SkipBits(4)); <span class="comment">// page_version_number</span></div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  RCHECK(reader.ReadBits(2, &page_state));</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  RCHECK(reader.SkipBits(2)); <span class="comment">// reserved</span></div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">if</span> (page_state == 0x1 || page_state == 0x2) {</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="comment">// If this is a "acquisition point" or a "mode change", then this is a new</span></div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="comment">// page and we should clear the old data.</span></div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  RCHECK(composer_.GetSamples(last_pts_, pts, samples));</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  composer_.ClearObjects();</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  last_pts_ = pts;</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>  </div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">while</span> (reader.bits_available() > 0u) {</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  uint8_t region_id;</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  uint16_t x, y;</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  RCHECK(reader.ReadBits(8, &region_id));</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  RCHECK(reader.SkipBits(8)); <span class="comment">// reserved</span></div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  RCHECK(reader.ReadBits(16, &x));</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  RCHECK(reader.ReadBits(16, &y));</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  </div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  RCHECK(composer_.SetRegionPosition(region_id, x, y));</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"> 120</span>  </div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> }</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  </div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="keywordtype">bool</span> DvbSubParser::ParseRegionComposition(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">size_t</span> size) {</div>
|
|
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="comment">// See ETSI EN 300 743 Section 7.2.3.</span></div>
|
|
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  BitReader reader(data, size);</div>
|
|
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  </div>
|
|
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  uint8_t region_id, clut_id;</div>
|
|
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  uint16_t region_width, region_height;</div>
|
|
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordtype">bool</span> region_fill_flag;</div>
|
|
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordtype">int</span> background_pixel_code;</div>
|
|
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  RCHECK(reader.ReadBits(8, &region_id));</div>
|
|
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  RCHECK(reader.SkipBits(4)); <span class="comment">// region_version_number</span></div>
|
|
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  RCHECK(reader.ReadBits(1, &region_fill_flag));</div>
|
|
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  RCHECK(reader.SkipBits(3)); <span class="comment">// reserved</span></div>
|
|
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  RCHECK(reader.ReadBits(16, &region_width));</div>
|
|
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  RCHECK(reader.ReadBits(16, &region_height));</div>
|
|
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  RCHECK(reader.SkipBits(3)); <span class="comment">// region_level_of_compatibility</span></div>
|
|
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  RCHECK(reader.SkipBits(3)); <span class="comment">// region_depth</span></div>
|
|
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  RCHECK(reader.SkipBits(2)); <span class="comment">// reserved</span></div>
|
|
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  RCHECK(reader.ReadBits(8, &clut_id));</div>
|
|
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  RCHECK(reader.ReadBits(8, &background_pixel_code));</div>
|
|
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  RCHECK(reader.SkipBits(4)); <span class="comment">// region_4-bit_pixel_code</span></div>
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|
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  RCHECK(reader.SkipBits(2)); <span class="comment">// region_2-bit_pixel_code</span></div>
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|
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  RCHECK(reader.SkipBits(2)); <span class="comment">// reserved</span></div>
|
|
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  RCHECK(</div>
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|
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  composer_.SetRegionInfo(region_id, clut_id, region_width, region_height));</div>
|
|
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">if</span> (!region_fill_flag)</div>
|
|
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  background_pixel_code = -1;</div>
|
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  </div>
|
|
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">while</span> (reader.bits_available() > 0) {</div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  uint16_t object_id, x, y;</div>
|
|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  uint8_t object_type;</div>
|
|
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  RCHECK(reader.ReadBits(16, &object_id));</div>
|
|
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  RCHECK(reader.ReadBits(2, &object_type));</div>
|
|
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  RCHECK(reader.SkipBits(2)); <span class="comment">// object_provider_flag</span></div>
|
|
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  RCHECK(reader.ReadBits(12, &x));</div>
|
|
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  RCHECK(reader.SkipBits(4)); <span class="comment">// reserved</span></div>
|
|
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  RCHECK(reader.ReadBits(12, &y));</div>
|
|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  </div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">if</span> (object_type == 0x01 || object_type == 0x02) {</div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  RCHECK(reader.SkipBits(8)); <span class="comment">// foreground_pixel_code</span></div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  RCHECK(reader.SkipBits(8)); <span class="comment">// background_pixel_code</span></div>
|
|
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  }</div>
|
|
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  RCHECK(composer_.SetObjectInfo(object_id, region_id, x, y,</div>
|
|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  background_pixel_code));</div>
|
|
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  }</div>
|
|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  </div>
|
|
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<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>  </div>
|
|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="keywordtype">bool</span> DvbSubParser::ParseClutDefinition(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">size_t</span> size) {</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="comment">// See ETSI EN 300 743 Section 7.2.4.</span></div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  BitReader reader(data, size);</div>
|
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  </div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  uint8_t clut_id;</div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  RCHECK(reader.ReadBits(8, &clut_id));</div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keyword">auto</span>* color_space = composer_.GetColorSpace(clut_id);</div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  RCHECK(reader.SkipBits(4)); <span class="comment">// CLUT_version_number</span></div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  RCHECK(reader.SkipBits(4)); <span class="comment">// reserved</span></div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">while</span> (reader.bits_available() > 0) {</div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  uint8_t clut_entry_id;</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  uint8_t has_2_bit;</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  uint8_t has_4_bit;</div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  uint8_t has_8_bit;</div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  uint8_t full_range_flag;</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  RCHECK(reader.ReadBits(8, &clut_entry_id));</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  RCHECK(reader.ReadBits(1, &has_2_bit));</div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  RCHECK(reader.ReadBits(1, &has_4_bit));</div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  RCHECK(reader.ReadBits(1, &has_8_bit));</div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  RCHECK(reader.SkipBits(4)); <span class="comment">// reserved</span></div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  RCHECK(reader.ReadBits(1, &full_range_flag));</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  </div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">if</span> (has_2_bit + has_4_bit + has_8_bit != 1) {</div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  LOG(ERROR) << <span class="stringliteral">"Must specify exactly one bit depth in CLUT definition"</span>;</div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  }</div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keyword">const</span> BitDepth bit_depth =</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  has_2_bit ? BitDepth::k2Bit</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  : (has_4_bit ? BitDepth::k4Bit : BitDepth::k8Bit);</div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  </div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  uint8_t Y, Cr, Cb, T;</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">if</span> (full_range_flag) {</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  RCHECK(reader.ReadBits(8, &Y));</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  RCHECK(reader.ReadBits(8, &Cr));</div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  RCHECK(reader.ReadBits(8, &Cb));</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  RCHECK(reader.ReadBits(8, &T));</div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="comment">// These store the most-significant bits, so shift them up.</span></div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  RCHECK(reader.ReadBits(6, &Y));</div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  Y <<= 2;</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  RCHECK(reader.ReadBits(4, &Cr));</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  Cr <<= 4;</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  RCHECK(reader.ReadBits(4, &Cb));</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  Cb <<= 4;</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  RCHECK(reader.ReadBits(2, &T));</div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  T <<= 6;</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  }</div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  color_space->SetColor(bit_depth, clut_entry_id, ConvertYuv(Y, Cr, Cb, T));</div>
|
|
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  }</div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  </div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">return</span> <span class="keyword">true</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>  </div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="keywordtype">bool</span> DvbSubParser::ParseObjectData(int64_t pts,</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keyword">const</span> uint8_t* data,</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordtype">size_t</span> size) {</div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="comment">// See ETSI EN 300 743 Section 7.2.5 Table 17.</span></div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  BitReader reader(data, size);</div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  </div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  uint16_t object_id;</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  uint8_t object_coding_method;</div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  RCHECK(reader.ReadBits(16, &object_id));</div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  RCHECK(reader.SkipBits(4)); <span class="comment">// object_version_number</span></div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  RCHECK(reader.ReadBits(2, &object_coding_method));</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  RCHECK(reader.SkipBits(1)); <span class="comment">// non_modifying_colour_flag</span></div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  RCHECK(reader.SkipBits(1)); <span class="comment">// reserved</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="keyword">auto</span>* image = composer_.GetObjectImage(object_id);</div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keyword">auto</span>* color_space = composer_.GetColorSpaceForObject(object_id);</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordflow">if</span> (!image || !color_space)</div>
|
|
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  </div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordflow">if</span> (object_coding_method == 0) {</div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  uint16_t top_field_length;</div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  uint16_t bottom_field_length;</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  RCHECK(reader.ReadBits(16, &top_field_length));</div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  RCHECK(reader.ReadBits(16, &bottom_field_length));</div>
|
|
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  </div>
|
|
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  RCHECK(ParsePixelDataSubObject(top_field_length, <span class="keyword">true</span>, &reader, color_space,</div>
|
|
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  image));</div>
|
|
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  RCHECK(ParsePixelDataSubObject(bottom_field_length, <span class="keyword">false</span>, &reader,</div>
|
|
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  color_space, image));</div>
|
|
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="comment">// Ignore 8_stuff_bits since we don't need to read to the end.</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">if</span> (bottom_field_length == 0) {</div>
|
|
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="comment">// If there are no bottom rows, then the top rows are used instead. See</span></div>
|
|
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="comment">// beginning of section 7.2.5.1.</span></div>
|
|
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  image->MirrorToBottomRows();</div>
|
|
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div>
|
|
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  LOG(ERROR) << <span class="stringliteral">"Unsupported DVB-sub object coding method: "</span></div>
|
|
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  << <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(object_coding_method);</div>
|
|
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keywordflow">return</span> <span class="keyword">false</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>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00267"></a><span class="lineno"> 267</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="keywordtype">bool</span> DvbSubParser::ParseDisplayDefinition(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">size_t</span> size) {</div>
|
|
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="comment">// See ETSI EN 300 743 Section 7.2.1.</span></div>
|
|
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  BitReader reader(data, size);</div>
|
|
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  </div>
|
|
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  uint16_t width, height;</div>
|
|
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  RCHECK(reader.SkipBits(4)); <span class="comment">// dds_version_number</span></div>
|
|
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  RCHECK(reader.SkipBits(1)); <span class="comment">// display_window_flag</span></div>
|
|
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  RCHECK(reader.SkipBits(3)); <span class="comment">// reserved</span></div>
|
|
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  RCHECK(reader.ReadBits(16, &width));</div>
|
|
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  RCHECK(reader.ReadBits(16, &height));</div>
|
|
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="comment">// Size is stored as -1.</span></div>
|
|
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  composer_.SetDisplaySize(width + 1, height + 1);</div>
|
|
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  </div>
|
|
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> }</div>
|
|
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  </div>
|
|
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="keywordtype">bool</span> DvbSubParser::ParsePixelDataSubObject(<span class="keywordtype">size_t</span> sub_object_length,</div>
|
|
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordtype">bool</span> is_top_fields,</div>
|
|
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  BitReader* reader,</div>
|
|
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  DvbImageColorSpace* color_space,</div>
|
|
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  DvbImageBuilder* image) {</div>
|
|
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> start = reader->bit_position() / 8;</div>
|
|
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordflow">while</span> (reader->bit_position() / 8 < start + sub_object_length) {</div>
|
|
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="comment">// See ETSI EN 300 743 Section 7.2.5.1 Table 20</span></div>
|
|
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  uint8_t data_type;</div>
|
|
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  RCHECK(reader->ReadBits(8, &data_type));</div>
|
|
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  uint8_t temp[16];</div>
|
|
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">switch</span> (data_type) {</div>
|
|
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">case</span> 0x10:</div>
|
|
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  RCHECK(Parse2BitPixelData(is_top_fields, reader, image));</div>
|
|
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  reader->SkipToNextByte();</div>
|
|
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordflow">case</span> 0x11:</div>
|
|
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  RCHECK(Parse4BitPixelData(is_top_fields, reader, image));</div>
|
|
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  reader->SkipToNextByte();</div>
|
|
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">case</span> 0x12:</div>
|
|
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  RCHECK(Parse8BitPixelData(is_top_fields, reader, image));</div>
|
|
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">case</span> 0x20:</div>
|
|
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 4; i++) {</div>
|
|
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  RCHECK(reader->ReadBits(4, &temp[i]));</div>
|
|
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  }</div>
|
|
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  color_space->Set2To4BitDepthMap(temp);</div>
|
|
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">case</span> 0x21:</div>
|
|
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 4; i++) {</div>
|
|
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  RCHECK(reader->ReadBits(8, &temp[i]));</div>
|
|
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  }</div>
|
|
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  color_space->Set2To8BitDepthMap(temp);</div>
|
|
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">case</span> 0x22:</div>
|
|
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 16; i++) {</div>
|
|
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  RCHECK(reader->ReadBits(8, &temp[i]));</div>
|
|
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  }</div>
|
|
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  color_space->Set4To8BitDepthMap(temp);</div>
|
|
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keywordflow">case</span> 0xf0:</div>
|
|
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  image->NewRow(is_top_fields);</div>
|
|
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="keywordflow">default</span>:</div>
|
|
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  LOG(ERROR) << <span class="stringliteral">"Unsupported DVB-sub pixel data format: 0x"</span> << std::hex</div>
|
|
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  << <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(data_type);</div>
|
|
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  }</div>
|
|
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  }</div>
|
|
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> }</div>
|
|
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  </div>
|
|
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="keywordtype">bool</span> DvbSubParser::Parse2BitPixelData(<span class="keywordtype">bool</span> is_top_fields,</div>
|
|
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  BitReader* reader,</div>
|
|
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  DvbImageBuilder* image) {</div>
|
|
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="comment">// 2-bit/pixel code string, Section 7.2.5.2.1, Table 22.</span></div>
|
|
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
|
|
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  uint8_t peek;</div>
|
|
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  RCHECK(reader->ReadBits(2, &peek));</div>
|
|
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">if</span> (peek != 0) {</div>
|
|
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  RCHECK(image->AddPixel(BitDepth::k2Bit, peek, is_top_fields));</div>
|
|
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  uint8_t switch_1;</div>
|
|
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  RCHECK(reader->ReadBits(1, &switch_1));</div>
|
|
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keywordflow">if</span> (switch_1 == 1) {</div>
|
|
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  uint8_t count_minus_3;</div>
|
|
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  RCHECK(reader->ReadBits(3, &count_minus_3));</div>
|
|
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  RCHECK(reader->ReadBits(2, &peek));</div>
|
|
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="keywordflow">for</span> (uint8_t i = 0; i < count_minus_3 + 3; i++)</div>
|
|
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  RCHECK(image->AddPixel(BitDepth::k2Bit, peek, is_top_fields));</div>
|
|
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  uint8_t switch_2;</div>
|
|
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  RCHECK(reader->ReadBits(1, &switch_2));</div>
|
|
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keywordflow">if</span> (switch_2 == 1) {</div>
|
|
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  RCHECK(image->AddPixel(BitDepth::k2Bit, 0, is_top_fields));</div>
|
|
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  uint8_t switch_3;</div>
|
|
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  RCHECK(reader->ReadBits(2, &switch_3));</div>
|
|
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">if</span> (switch_3 == 0) {</div>
|
|
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (switch_3 == 1) {</div>
|
|
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  RCHECK(image->AddPixel(BitDepth::k2Bit, 0, is_top_fields));</div>
|
|
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  RCHECK(image->AddPixel(BitDepth::k2Bit, 0, is_top_fields));</div>
|
|
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (switch_3 == 2) {</div>
|
|
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  uint8_t count_minus_12;</div>
|
|
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  RCHECK(reader->ReadBits(4, &count_minus_12));</div>
|
|
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  RCHECK(reader->ReadBits(2, &peek));</div>
|
|
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keywordflow">for</span> (uint8_t i = 0; i < count_minus_12 + 12; i++)</div>
|
|
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  RCHECK(image->AddPixel(BitDepth::k2Bit, peek, is_top_fields));</div>
|
|
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (switch_3 == 3) {</div>
|
|
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  uint8_t count_minus_29;</div>
|
|
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  RCHECK(reader->ReadBits(8, &count_minus_29));</div>
|
|
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  RCHECK(reader->ReadBits(2, &peek));</div>
|
|
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">for</span> (uint8_t i = 0; i < count_minus_29 + 29; i++)</div>
|
|
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  RCHECK(image->AddPixel(BitDepth::k2Bit, peek, is_top_fields));</div>
|
|
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  }</div>
|
|
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  }</div>
|
|
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  }</div>
|
|
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  }</div>
|
|
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  }</div>
|
|
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  </div>
|
|
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> }</div>
|
|
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  </div>
|
|
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="keywordtype">bool</span> DvbSubParser::Parse4BitPixelData(<span class="keywordtype">bool</span> is_top_fields,</div>
|
|
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  BitReader* reader,</div>
|
|
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  DvbImageBuilder* image) {</div>
|
|
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="comment">// 4-bit/pixel code string, Section 7.2.5.2.2, Table 24.</span></div>
|
|
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  DCHECK(reader->bits_available() % 8 == 0);</div>
|
|
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
|
|
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  uint8_t peek;</div>
|
|
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  RCHECK(reader->ReadBits(4, &peek));</div>
|
|
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keywordflow">if</span> (peek != 0) {</div>
|
|
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  RCHECK(image->AddPixel(BitDepth::k4Bit, peek, is_top_fields));</div>
|
|
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  uint8_t switch_1;</div>
|
|
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  RCHECK(reader->ReadBits(1, &switch_1));</div>
|
|
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">if</span> (switch_1 == 0) {</div>
|
|
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  RCHECK(reader->ReadBits(3, &peek));</div>
|
|
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">if</span> (peek != 0) {</div>
|
|
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < peek + 2; i++)</div>
|
|
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  RCHECK(image->AddPixel(BitDepth::k4Bit, 0, is_top_fields));</div>
|
|
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  }</div>
|
|
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  uint8_t switch_2;</div>
|
|
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  RCHECK(reader->ReadBits(1, &switch_2));</div>
|
|
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  <span class="keywordflow">if</span> (switch_2 == 0) {</div>
|
|
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  RCHECK(reader->ReadBits(2, &peek)); <span class="comment">// run_length_4-7</span></div>
|
|
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  uint8_t code;</div>
|
|
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  RCHECK(reader->ReadBits(4, &code));</div>
|
|
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < peek + 4; i++)</div>
|
|
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  RCHECK(image->AddPixel(BitDepth::k4Bit, code, is_top_fields));</div>
|
|
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  uint8_t switch_3;</div>
|
|
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  RCHECK(reader->ReadBits(2, &switch_3));</div>
|
|
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">if</span> (switch_3 == 0) {</div>
|
|
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  RCHECK(image->AddPixel(BitDepth::k4Bit, 0, is_top_fields));</div>
|
|
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (switch_3 == 1) {</div>
|
|
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  RCHECK(image->AddPixel(BitDepth::k4Bit, 0, is_top_fields));</div>
|
|
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  RCHECK(image->AddPixel(BitDepth::k4Bit, 0, is_top_fields));</div>
|
|
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (switch_3 == 2) {</div>
|
|
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  RCHECK(reader->ReadBits(4, &peek)); <span class="comment">// run_length_9-24</span></div>
|
|
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  uint8_t code;</div>
|
|
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  RCHECK(reader->ReadBits(4, &code));</div>
|
|
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < peek + 9; i++)</div>
|
|
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  RCHECK(image->AddPixel(BitDepth::k4Bit, code, is_top_fields));</div>
|
|
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="comment">// switch_3 == 3</span></div>
|
|
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  RCHECK(reader->ReadBits(8, &peek)); <span class="comment">// run_length_25-280</span></div>
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<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  uint8_t code;</div>
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<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  RCHECK(reader->ReadBits(4, &code));</div>
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<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < peek + 25; i++)</div>
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<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  RCHECK(image->AddPixel(BitDepth::k4Bit, code, is_top_fields));</div>
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<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  }</div>
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<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  }</div>
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<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  }</div>
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<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  }</div>
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<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  }</div>
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<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00447"></a><span class="lineno"> 447</span> }</div>
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<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  </div>
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<div class="line"><a name="l00449"></a><span class="lineno"> 449</span> <span class="keywordtype">bool</span> DvbSubParser::Parse8BitPixelData(<span class="keywordtype">bool</span> is_top_fields,</div>
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<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  BitReader* reader,</div>
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<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  DvbImageBuilder* image) {</div>
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<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span class="comment">// 8-bit/pixel code string, Section 7.2.5.2.3, Table 26.</span></div>
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<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
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<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  uint8_t peek;</div>
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<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  RCHECK(reader->ReadBits(8, &peek));</div>
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<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="keywordflow">if</span> (peek != 0) {</div>
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<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  RCHECK(image->AddPixel(BitDepth::k8Bit, peek, is_top_fields));</div>
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<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  uint8_t switch_1;</div>
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<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  RCHECK(reader->ReadBits(1, &switch_1));</div>
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|
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="keywordflow">if</span> (switch_1 == 0) {</div>
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<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  RCHECK(reader->ReadBits(7, &peek));</div>
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<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keywordflow">if</span> (peek != 0) {</div>
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<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">for</span> (uint8_t i = 0; i < peek; i++)</div>
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<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  RCHECK(image->AddPixel(BitDepth::k8Bit, 0, is_top_fields));</div>
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<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  }</div>
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<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  uint8_t count;</div>
|
|
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  RCHECK(reader->ReadBits(7, &count));</div>
|
|
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  RCHECK(reader->ReadBits(8, &peek));</div>
|
|
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  <span class="keywordflow">for</span> (uint8_t i = 0; i < count; i++)</div>
|
|
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  RCHECK(image->AddPixel(BitDepth::k8Bit, peek, is_top_fields));</div>
|
|
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  }</div>
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<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  }</div>
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<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  }</div>
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<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  </div>
|
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<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> }</div>
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<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  </div>
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<div class="line"><a name="l00482"></a><span class="lineno"> 482</span> } <span class="comment">// namespace media</span></div>
|
|
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span> } <span class="comment">// namespace shaka</span></div>
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</div><!-- fragment --></div><!-- contents -->
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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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