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<div class="title">hevc_decoder_configuration.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>
|
||
<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>
|
||
<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>
|
||
<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/filters/hevc_decoder_configuration.h"</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
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||
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "packager/base/stl_util.h"</span></div>
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||
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "packager/base/strings/string_number_conversions.h"</span></div>
|
||
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "packager/base/strings/string_util.h"</span></div>
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||
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "packager/media/base/buffer_reader.h"</span></div>
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||
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "packager/media/formats/mp4/rcheck.h"</span></div>
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||
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
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||
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">namespace </span>edash_packager {</div>
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||
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">namespace </span>media {</div>
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||
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">namespace </span>{</div>
|
||
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
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||
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// ISO/IEC 14496-15:2014 Annex E.</span></div>
|
||
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> std::string GeneralProfileSpaceAsString(uint8_t general_profile_space) {</div>
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||
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="keywordflow">switch</span> (general_profile_space) {</div>
|
||
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keywordflow">case</span> 0:</div>
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||
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keywordflow">return</span> <span class="stringliteral">""</span>;</div>
|
||
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keywordflow">case</span> 1:</div>
|
||
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keywordflow">return</span> <span class="stringliteral">"A"</span>;</div>
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||
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keywordflow">case</span> 2:</div>
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||
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keywordflow">return</span> <span class="stringliteral">"B"</span>;</div>
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||
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordflow">case</span> 3:</div>
|
||
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordflow">return</span> <span class="stringliteral">"C"</span>;</div>
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||
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keywordflow">default</span>:</div>
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||
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  LOG(WARNING) << <span class="stringliteral">"Unexpected general_profile_space "</span></div>
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||
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  << general_profile_space;</div>
|
||
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keywordflow">return</span> <span class="stringliteral">""</span>;</div>
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||
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  }</div>
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||
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> }</div>
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||
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
|
||
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> std::string TrimLeadingZeros(<span class="keyword">const</span> std::string& str) {</div>
|
||
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  DCHECK_GT(str.size(), 0u);</div>
|
||
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < str.size(); ++i) {</div>
|
||
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">if</span> (str[i] == <span class="charliteral">'0'</span>) <span class="keywordflow">continue</span>;</div>
|
||
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">return</span> str.substr(i);</div>
|
||
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  }</div>
|
||
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">return</span> <span class="stringliteral">"0"</span>;</div>
|
||
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> }</div>
|
||
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
|
||
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// Encode the 32 bits input, but in reverse bit order, i.e. bit [31] as the most</span></div>
|
||
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// significant bit, followed by, bit [30], and down to bit [0] as the least</span></div>
|
||
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">// significant bit, where bits [i] for i in the range of 0 to 31, inclusive, are</span></div>
|
||
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">// specified in ISO/IEC 23008‐2, encoded in hexadecimal (leading zeroes may be</span></div>
|
||
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">// omitted).</span></div>
|
||
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> std::string ReverseBitsAndHexEncode(uint32_t x) {</div>
|
||
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  x = ((x & 0x55555555) << 1) | ((x & 0xAAAAAAAA) >> 1);</div>
|
||
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  x = ((x & 0x33333333) << 2) | ((x & 0xCCCCCCCC) >> 2);</div>
|
||
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  x = ((x & 0x0F0F0F0F) << 4) | ((x & 0xF0F0F0F0) >> 4);</div>
|
||
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">const</span> uint8_t bytes[] = {<span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(x & 0xFF),</div>
|
||
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  static_cast<uint8_t>((x >> 8) & 0xFF),</div>
|
||
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  static_cast<uint8_t>((x >> 16) & 0xFF),</div>
|
||
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  static_cast<uint8_t>((x >> 24) & 0xFF)};</div>
|
||
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">return</span> TrimLeadingZeros(base::HexEncode(bytes, arraysize(bytes)));</div>
|
||
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> }</div>
|
||
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div>
|
||
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> std::string CodecAsString(VideoCodec codec) {</div>
|
||
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">switch</span> (codec) {</div>
|
||
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">case</span> kCodecHEV1:</div>
|
||
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">return</span> <span class="stringliteral">"hev1"</span>;</div>
|
||
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">case</span> kCodecHVC1:</div>
|
||
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">return</span> <span class="stringliteral">"hvc1"</span>;</div>
|
||
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">default</span>:</div>
|
||
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  LOG(WARNING) << <span class="stringliteral">"Unknown codec: "</span> << codec;</div>
|
||
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> std::string();</div>
|
||
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div>
|
||
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> }</div>
|
||
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div>
|
||
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> } <span class="comment">// namespace</span></div>
|
||
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div>
|
||
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> HEVCDecoderConfiguration::HEVCDecoderConfiguration()</div>
|
||
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  : version_(0),</div>
|
||
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  general_profile_space_(0),</div>
|
||
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  general_tier_flag_(false),</div>
|
||
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  general_profile_idc_(0),</div>
|
||
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  general_profile_compatibility_flags_(0),</div>
|
||
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  general_level_idc_(0),</div>
|
||
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  length_size_(0) {}</div>
|
||
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div>
|
||
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> HEVCDecoderConfiguration::~HEVCDecoderConfiguration() {}</div>
|
||
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div>
|
||
<div class="line"><a name="l00088"></a><span class="lineno"><a class="line" href="../../d6/d5d/classedash__packager_1_1media_1_1HEVCDecoderConfiguration.html#a2b5bd2af5583ef512e8620aabf6afce6"> 88</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../d6/d5d/classedash__packager_1_1media_1_1HEVCDecoderConfiguration.html#a2b5bd2af5583ef512e8620aabf6afce6">HEVCDecoderConfiguration::Parse</a>(<span class="keyword">const</span> std::vector<uint8_t>& data) {</div>
|
||
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <a class="code" href="../../d9/d46/classedash__packager_1_1media_1_1BufferReader.html">BufferReader</a> reader(vector_as_array(&data), data.size());</div>
|
||
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
|
||
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  uint8_t profile_indication = 0;</div>
|
||
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  uint8_t length_size_minus_one = 0;</div>
|
||
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  uint8_t num_of_arrays = 0;</div>
|
||
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  RCHECK(reader.Read1(&version_) && version_ == 1 &&</div>
|
||
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  reader.Read1(&profile_indication) &&</div>
|
||
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  reader.Read4(&general_profile_compatibility_flags_) &&</div>
|
||
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  reader.ReadToVector(&general_constraint_indicator_flags_, 6) &&</div>
|
||
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  reader.Read1(&general_level_idc_) &&</div>
|
||
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  reader.SkipBytes(8) && <span class="comment">// Skip uninterested fields.</span></div>
|
||
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  reader.Read1(&length_size_minus_one) &&</div>
|
||
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  reader.Read1(&num_of_arrays));</div>
|
||
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div>
|
||
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  general_profile_space_ = profile_indication >> 6;</div>
|
||
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  RCHECK(general_profile_space_ <= 3u);</div>
|
||
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  general_tier_flag_ = ((profile_indication >> 5) & 1) == 1;</div>
|
||
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  general_profile_idc_ = profile_indication & 0x1f;</div>
|
||
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
|
||
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  length_size_ = (length_size_minus_one & 0x3) + 1;</div>
|
||
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div>
|
||
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="comment">// TODO(kqyang): Parse SPS to get resolutions.</span></div>
|
||
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
||
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> }</div>
|
||
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div>
|
||
<div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="../../d6/d5d/classedash__packager_1_1media_1_1HEVCDecoderConfiguration.html#abe707416639b9382c680647d6970eda5"> 114</a></span> std::string <a class="code" href="../../d6/d5d/classedash__packager_1_1media_1_1HEVCDecoderConfiguration.html#abe707416639b9382c680647d6970eda5">HEVCDecoderConfiguration::GetCodecString</a>(VideoCodec codec)<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="comment">// ISO/IEC 14496-15:2014 Annex E.</span></div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  std::vector<std::string> fields;</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  fields.push_back(CodecAsString(codec));</div>
|
||
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  fields.push_back(GeneralProfileSpaceAsString(general_profile_space_) +</div>
|
||
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  base::IntToString(general_profile_idc_));</div>
|
||
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  fields.push_back(</div>
|
||
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  ReverseBitsAndHexEncode(general_profile_compatibility_flags_));</div>
|
||
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  fields.push_back((general_tier_flag_ ? <span class="stringliteral">"H"</span> : <span class="stringliteral">"L"</span>) +</div>
|
||
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  base::IntToString(general_level_idc_));</div>
|
||
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div>
|
||
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="comment">// Remove trailing bytes that are zero.</span></div>
|
||
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  std::vector<uint8_t> constraints = general_constraint_indicator_flags_;</div>
|
||
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordtype">size_t</span> size = constraints.size();</div>
|
||
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">for</span> (; size > 0; --size) {</div>
|
||
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">if</span> (constraints[size - 1] != 0) <span class="keywordflow">break</span>;</div>
|
||
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div>
|
||
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  constraints.resize(size);</div>
|
||
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">for</span> (uint8_t constraint : constraints)</div>
|
||
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  fields.push_back(TrimLeadingZeros(base::HexEncode(&constraint, 1)));</div>
|
||
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> </div>
|
||
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">return</span> base::JoinString(fields, <span class="stringliteral">"."</span>);</div>
|
||
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> }</div>
|
||
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> </div>
|
||
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> } <span class="comment">// namespace media</span></div>
|
||
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> } <span class="comment">// namespace edash_packager</span></div>
|
||
<div class="ttc" id="classedash__packager_1_1media_1_1HEVCDecoderConfiguration_html_abe707416639b9382c680647d6970eda5"><div class="ttname"><a href="../../d6/d5d/classedash__packager_1_1media_1_1HEVCDecoderConfiguration.html#abe707416639b9382c680647d6970eda5">edash_packager::media::HEVCDecoderConfiguration::GetCodecString</a></div><div class="ttdeci">std::string GetCodecString(VideoCodec codec) const </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d41/hevc__decoder__configuration_8cc_source.html#l00114">hevc_decoder_configuration.cc:114</a></div></div>
|
||
<div class="ttc" id="classedash__packager_1_1media_1_1BufferReader_html"><div class="ttname"><a href="../../d9/d46/classedash__packager_1_1media_1_1BufferReader.html">edash_packager::media::BufferReader</a></div><div class="ttdef"><b>Definition:</b> <a href="../../de/d3e/buffer__reader_8h_source.html#l00022">buffer_reader.h:22</a></div></div>
|
||
<div class="ttc" id="classedash__packager_1_1media_1_1HEVCDecoderConfiguration_html_a2b5bd2af5583ef512e8620aabf6afce6"><div class="ttname"><a href="../../d6/d5d/classedash__packager_1_1media_1_1HEVCDecoderConfiguration.html#a2b5bd2af5583ef512e8620aabf6afce6">edash_packager::media::HEVCDecoderConfiguration::Parse</a></div><div class="ttdeci">bool Parse(const std::vector< uint8_t > &data)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d41/hevc__decoder__configuration_8cc_source.html#l00088">hevc_decoder_configuration.cc:88</a></div></div>
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