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<li class="navelem"><a class="el" href="../../dir_3f8eec2fc361645de4b1ec14c19fffc7.html">packager</a></li><li class="navelem"><a class="el" href="../../dir_f99dae54fe7170f791f339b952d5067a.html">media</a></li><li class="navelem"><a class="el" href="../../dir_aa847bee70cdde822696c7e33a504139.html">crypto</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2018 Google LLC. All rights reserved.</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div><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><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "packager/media/crypto/subsample_generator.h"</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <algorithm></span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <limits></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "packager/media/base/decrypt_config.h"</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "packager/media/base/video_stream_info.h"</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "packager/media/codecs/av1_parser.h"</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "packager/media/codecs/video_slice_header_parser.h"</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "packager/media/codecs/vp8_parser.h"</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "packager/media/codecs/vp9_parser.h"</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span><a class="code" href="../../d8/daf/namespaceshaka.html">shaka</a> {</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">namespace </span>media {</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>{</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> kAesBlockSize = 16u;</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> uint8_t GetNaluLengthSize(<span class="keyword">const</span> StreamInfo& stream_info) {</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keywordflow">if</span> (stream_info.stream_type() != kStreamVideo)</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keyword">const</span> VideoStreamInfo& video_stream_info =</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">static_cast<</span><span class="keyword">const </span>VideoStreamInfo&<span class="keyword">></span>(stream_info);</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keywordflow">return</span> video_stream_info.nalu_length_size();</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> }</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keywordtype">bool</span> ShouldAlignProtectedData(Codec codec,</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  FourCC protection_scheme,</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordtype">bool</span> vp9_subsample_encryption) {</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">switch</span> (codec) {</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">case</span> kCodecAV1:</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="comment">// Per AV1 in ISO-BMFF spec [1], BytesOfProtectedData SHALL be a multiple</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// of 16 bytes.</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="comment">// [1] https://aomediacodec.github.io/av1-isobmff/#subsample-encryption</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">case</span> kCodecVP9:</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="comment">// "VP Codec ISO Media File Format Binding" document requires that the</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// encrypted bytes of each frame within the superframe must be block</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// aligned so that the counter state can be computed for each frame</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// within the superframe.</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="comment">// ISO/IEC 23001-7:2016 10.2 'cbc1' 10.3 'cens'</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="comment">// The BytesOfProtectedData size SHALL be a multiple of 16 bytes to</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="comment">// avoid partial blocks in Subsamples.</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="comment">// For consistency, apply block alignment to all frames when VP9 subsample</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="comment">// encryption is enabled.</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">return</span> vp9_subsample_encryption;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="comment">// ISO/IEC 23001-7:2016 10.2 'cbc1' 10.3 'cens'</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// The BytesOfProtectedData size SHALL be a multiple of 16 bytes to avoid</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="comment">// partial blocks in Subsamples.</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// CMAF requires 'cenc' scheme BytesOfProtectedData SHALL be a multiple of</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="comment">// 16 bytes; while 'cbcs' scheme BytesOfProtectedData SHALL start on the</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">// first byte of video data following the slice header.</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">return</span> protection_scheme == FOURCC_cbc1 ||</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  protection_scheme == FOURCC_cens ||</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  protection_scheme == FOURCC_cenc;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> }</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment">// A convenient util class to organize subsamples, e.g. combine consecutive</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment">// subsamples with only clear bytes, split subsamples if the clear bytes exceeds</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment">// 2^16 etc.</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="keyword">class </span>SubsampleOrganizer {</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  SubsampleOrganizer(<span class="keywordtype">bool</span> align_protected_data,</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  std::vector<SubsampleEntry>* subsamples)</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  : align_protected_data_(align_protected_data), subsamples_(subsamples) {}</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  ~SubsampleOrganizer() {</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">if</span> (accumulated_clear_bytes_ > 0) {</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  PushSubsample(accumulated_clear_bytes_, 0);</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  accumulated_clear_bytes_ = 0;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  }</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordtype">void</span> AddSubsample(<span class="keywordtype">size_t</span> clear_bytes, <span class="keywordtype">size_t</span> cipher_bytes) {</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  DCHECK_LT(clear_bytes, std::numeric_limits<uint32_t>::max());</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  DCHECK_LT(cipher_bytes, std::numeric_limits<uint32_t>::max());</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">if</span> (align_protected_data_ && cipher_bytes != 0) {</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> misalign_bytes = cipher_bytes % kAesBlockSize;</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  clear_bytes += misalign_bytes;</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  cipher_bytes -= misalign_bytes;</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  }</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  accumulated_clear_bytes_ += clear_bytes;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="comment">// Accumulated clear bytes are handled later.</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">if</span> (cipher_bytes == 0)</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  PushSubsample(accumulated_clear_bytes_, cipher_bytes);</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  accumulated_clear_bytes_ = 0;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  SubsampleOrganizer(<span class="keyword">const</span> SubsampleOrganizer&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  SubsampleOrganizer& operator=(<span class="keyword">const</span> SubsampleOrganizer&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordtype">void</span> PushSubsample(<span class="keywordtype">size_t</span> clear_bytes, <span class="keywordtype">size_t</span> cipher_bytes) {</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keyword">const</span> uint16_t kUInt16Max = std::numeric_limits<uint16_t>::max();</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">while</span> (clear_bytes > kUInt16Max) {</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  subsamples_->emplace_back(kUInt16Max, 0);</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  clear_bytes -= kUInt16Max;</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  }</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  subsamples_->emplace_back(static_cast<uint16_t>(clear_bytes),</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  static_cast<uint32_t>(cipher_bytes));</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  }</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> align_protected_data_ = <span class="keyword">false</span>;</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  std::vector<SubsampleEntry>* <span class="keyword">const</span> subsamples_ = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordtype">size_t</span> accumulated_clear_bytes_ = 0;</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> };</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div><div class="line"><a name="l00123"></a><span class="lineno"><a class="line" href="../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a1674b4a68974db06ad4efa9a9b699a46"> 123</a></span> <a class="code" href="../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a1674b4a68974db06ad4efa9a9b699a46">SubsampleGenerator::SubsampleGenerator</a>(<span class="keywordtype">bool</span> vp9_subsample_encryption)</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  : vp9_subsample_encryption_(vp9_subsample_encryption) {}</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> SubsampleGenerator::~SubsampleGenerator() {}</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div><div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#ac4478f9099344a05be5b9b3e4e209817"> 128</a></span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> <a class="code" href="../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#ac4478f9099344a05be5b9b3e4e209817">SubsampleGenerator::Initialize</a>(FourCC protection_scheme,</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">const</span> <a class="code" href="../../d5/db1/classshaka_1_1media_1_1StreamInfo.html">StreamInfo</a>& stream_info) {</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  codec_ = stream_info.codec();</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  nalu_length_size_ = GetNaluLengthSize(stream_info);</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">switch</span> (codec_) {</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">case</span> kCodecAV1:</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  av1_parser_.reset(<span class="keyword">new</span> <a class="code" href="../../db/dc7/classshaka_1_1media_1_1AV1Parser.html">AV1Parser</a>);</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">case</span> kCodecVP9:</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">if</span> (vp9_subsample_encryption_)</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  vpx_parser_.reset(<span class="keyword">new</span> <a class="code" href="../../db/d5a/classshaka_1_1media_1_1VP9Parser.html">VP9Parser</a>);</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">case</span> kCodecH264:</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  header_parser_.reset(<span class="keyword">new</span> <a class="code" href="../../da/df0/classshaka_1_1media_1_1H264VideoSliceHeaderParser.html">H264VideoSliceHeaderParser</a>);</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">case</span> kCodecH265:</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">case</span> kCodecH265DolbyVision:</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  header_parser_.reset(<span class="keyword">new</span> <a class="code" href="../../d1/d79/classshaka_1_1media_1_1H265VideoSliceHeaderParser.html">H265VideoSliceHeaderParser</a>);</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="comment">// Other codecs should have nalu length size == 0.</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">if</span> (nalu_length_size_ > 0) {</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  LOG(WARNING) << <span class="stringliteral">"Unknown video codec '"</span> << codec_ << <span class="stringliteral">"'"</span>;</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::ENCRYPTION_FAILURE, <span class="stringliteral">"Unknown video codec."</span>);</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  }</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  }</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">if</span> (av1_parser_) {</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="comment">// Parse configOBUs in AV1CodecConfigurationRecord if exists.</span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="comment">// https://aomediacodec.github.io/av1-isobmff/#av1codecconfigurationbox-syntax.</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> kConfigOBUsOffset = 4;</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_config_obus =</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  stream_info.codec_config().size() > kConfigOBUsOffset;</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  std::vector<AV1Parser::Tile> tiles;</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">if</span> (has_config_obus &&</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  !av1_parser_->Parse(</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  &stream_info.codec_config()[kConfigOBUsOffset],</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  stream_info.codec_config().size() - kConfigOBUsOffset, &tiles)) {</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  error::ENCRYPTION_FAILURE,</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="stringliteral">"Failed to parse configOBUs in AV1CodecConfigurationRecord."</span>);</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  DCHECK(tiles.empty());</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="keywordflow">if</span> (header_parser_) {</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  CHECK_NE(nalu_length_size_, 0u) << <span class="stringliteral">"AnnexB stream is not supported yet"</span>;</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">if</span> (!header_parser_->Initialize(stream_info.codec_config())) {</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::ENCRYPTION_FAILURE,</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="stringliteral">"Failed to read SPS and PPS data."</span>);</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  }</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> </div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  align_protected_data_ = ShouldAlignProtectedData(codec_, protection_scheme,</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  vp9_subsample_encryption_);</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">if</span> (protection_scheme == kAppleSampleAesProtectionScheme) {</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> kH264LeadingClearBytesSize = 32u;</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> kAudioLeadingClearBytesSize = 16u;</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">switch</span> (codec_) {</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">case</span> kCodecH264:</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  leading_clear_bytes_size_ = kH264LeadingClearBytesSize;</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  min_protected_data_size_ =</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  leading_clear_bytes_size_ + kAesBlockSize + 1u;</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordflow">case</span> kCodecAAC:</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  FALLTHROUGH_INTENDED;</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">case</span> kCodecAC3:</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  leading_clear_bytes_size_ = kAudioLeadingClearBytesSize;</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  min_protected_data_size_ = leading_clear_bytes_size_ + kAesBlockSize;</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">case</span> kCodecEAC3:</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// E-AC3 encryption is handled by SampleAesEc3Cryptor, which also</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="comment">// manages leading clear bytes.</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  leading_clear_bytes_size_ = 0;</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  min_protected_data_size_ = leading_clear_bytes_size_ + kAesBlockSize;</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  LOG(ERROR) << <span class="stringliteral">"Unexpected codec for SAMPLE-AES "</span> << codec_;</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::ENCRYPTION_FAILURE,</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="stringliteral">"Unexpected codec for SAMPLE-AES."</span>);</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  }</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  }</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">return</span> Status::OK;</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span> }</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> </div><div class="line"><a name="l00213"></a><span class="lineno"><a class="line" href="../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a8d4d840fd11c1c89b8ed03cdf076c64e"> 213</a></span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> <a class="code" href="../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a8d4d840fd11c1c89b8ed03cdf076c64e">SubsampleGenerator::GenerateSubsamples</a>(</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keyword">const</span> uint8_t* frame,</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordtype">size_t</span> frame_size,</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  std::vector<SubsampleEntry>* subsamples) {</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  subsamples->clear();</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">switch</span> (codec_) {</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">case</span> kCodecAV1:</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">return</span> GenerateSubsamplesFromAV1Frame(frame, frame_size, subsamples);</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">case</span> kCodecH264:</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  FALLTHROUGH_INTENDED;</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">case</span> kCodecH265:</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">case</span> kCodecH265DolbyVision:</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">return</span> GenerateSubsamplesFromH26xFrame(frame, frame_size, subsamples);</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">case</span> kCodecVP9:</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordflow">if</span> (vp9_subsample_encryption_)</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordflow">return</span> GenerateSubsamplesFromVPxFrame(frame, frame_size, subsamples);</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="comment">// Full sample encrypted so no subsamples.</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="comment">// Other codecs are full sample encrypted unless there are clear leading</span></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="comment">// bytes.</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordflow">if</span> (leading_clear_bytes_size_ > 0) {</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  SubsampleOrganizer subsample_organizer(align_protected_data_,</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  subsamples);</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> clear_bytes =</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  std::min(frame_size, leading_clear_bytes_size_);</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> cipher_bytes = frame_size - clear_bytes;</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  subsample_organizer.AddSubsample(clear_bytes, cipher_bytes);</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="comment">// Full sample encrypted so no subsamples.</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">break</span>;</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  }</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">return</span> Status::OK;</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> }</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="keywordtype">void</span> SubsampleGenerator::InjectVpxParserForTesting(</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  std::unique_ptr<VPxParser> vpx_parser) {</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  vpx_parser_ = std::move(vpx_parser);</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> }</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="keywordtype">void</span> SubsampleGenerator::InjectVideoSliceHeaderParserForTesting(</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  std::unique_ptr<VideoSliceHeaderParser> header_parser) {</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  header_parser_ = std::move(header_parser);</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> }</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="keywordtype">void</span> SubsampleGenerator::InjectAV1ParserForTesting(</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  std::unique_ptr<AV1Parser> av1_parser) {</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  av1_parser_ = std::move(av1_parser);</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span> }</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> SubsampleGenerator::GenerateSubsamplesFromVPxFrame(</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keyword">const</span> uint8_t* frame,</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordtype">size_t</span> frame_size,</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  std::vector<SubsampleEntry>* subsamples) {</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  DCHECK(vpx_parser_);</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  std::vector<VPxFrameInfo> vpx_frames;</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">if</span> (!vpx_parser_->Parse(frame, frame_size, &vpx_frames))</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::ENCRYPTION_FAILURE, <span class="stringliteral">"Failed to parse vpx frame."</span>);</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>  SubsampleOrganizer subsample_organizer(align_protected_data_, subsamples);</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordtype">size_t</span> total_size = 0;</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code" href="../../d0/d11/structshaka_1_1media_1_1VPxFrameInfo.html">VPxFrameInfo</a>& frame : vpx_frames) {</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  subsample_organizer.AddSubsample(</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  frame.uncompressed_header_size,</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  frame.frame_size - frame.uncompressed_header_size);</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  total_size += frame.frame_size;</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="comment">// Add subsample for the superframe index if exists.</span></div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_superframe = vpx_frames.size() > 1;</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">if</span> (is_superframe) {</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> index_size = frame_size - total_size;</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  DCHECK_LE(index_size, 2 + vpx_frames.size() * 4);</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  DCHECK_GE(index_size, 2 + vpx_frames.size() * 1);</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  subsample_organizer.AddSubsample(index_size, 0);</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  DCHECK_EQ(total_size, frame_size);</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  }</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">return</span> Status::OK;</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> }</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> SubsampleGenerator::GenerateSubsamplesFromH26xFrame(</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keyword">const</span> uint8_t* frame,</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordtype">size_t</span> frame_size,</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  std::vector<SubsampleEntry>* subsamples) {</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  DCHECK_NE(nalu_length_size_, 0u);</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  DCHECK(header_parser_);</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> </div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  SubsampleOrganizer subsample_organizer(align_protected_data_, subsamples);</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span> </div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keyword">const</span> Nalu::CodecType nalu_type =</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  (codec_ == kCodecH265 || codec_ == kCodecH265DolbyVision) ? Nalu::kH265</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  : Nalu::kH264;</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html">NaluReader</a> reader(nalu_type, nalu_length_size_, frame, frame_size);</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span> </div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html">Nalu</a> nalu;</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  NaluReader::Result result;</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordflow">while</span> ((result = reader.<a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#ae051f1f92d84acfcd4cc159d972d647a">Advance</a>(&nalu)) == NaluReader::kOk) {</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="comment">// |header_parser_| is only used if |leading_clear_bytes_size_| is not</span></div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="comment">// availble. See lines below.</span></div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">if</span> (leading_clear_bytes_size_ == 0 && !header_parser_->ProcessNalu(nalu)) {</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  LOG(ERROR) << <span class="stringliteral">"Failed to process NAL unit: NAL type = "</span> << nalu.<a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a7a3b4358f56619fc63fe74525f4eb92b">type</a>();</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::ENCRYPTION_FAILURE, <span class="stringliteral">"Failed to process NAL unit."</span>);</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> </div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> nalu_total_size = nalu.<a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a835d8f01a8ab94887ee3dce3b5d3721e">header_size</a>() + nalu.<a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#abe782e4298e7add8ce0a1c33e66cfcdb">payload_size</a>();</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordtype">size_t</span> clear_bytes = 0;</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">if</span> (nalu.<a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a63f091b3dbe862fd4519c1b374dfc937">is_video_slice</a>() && nalu_total_size >= min_protected_data_size_) {</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  clear_bytes = leading_clear_bytes_size_;</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="keywordflow">if</span> (clear_bytes == 0) {</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="comment">// For video-slice NAL units, encrypt the video slice. This skips</span></div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="comment">// the frame header.</span></div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keyword">const</span> int64_t video_slice_header_size =</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  header_parser_->GetHeaderSize(nalu);</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">if</span> (video_slice_header_size < 0) {</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  LOG(ERROR) << <span class="stringliteral">"Failed to read slice header."</span>;</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::ENCRYPTION_FAILURE,</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="stringliteral">"Failed to read slice header."</span>);</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  }</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  clear_bytes = nalu.<a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a835d8f01a8ab94887ee3dce3b5d3721e">header_size</a>() + video_slice_header_size;</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">else</span> {</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="comment">// For non-video-slice or small NAL units, don't encrypt.</span></div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  clear_bytes = nalu_total_size;</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  }</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> cipher_bytes = nalu_total_size - clear_bytes;</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  subsample_organizer.AddSubsample(nalu_length_size_ + clear_bytes,</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  cipher_bytes);</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  }</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="keywordflow">if</span> (result != NaluReader::kEOStream) {</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  LOG(ERROR) << <span class="stringliteral">"Failed to parse NAL units."</span>;</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::ENCRYPTION_FAILURE, <span class="stringliteral">"Failed to parse NAL units."</span>);</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  }</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">return</span> Status::OK;</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> }</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span> </div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> SubsampleGenerator::GenerateSubsamplesFromAV1Frame(</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keyword">const</span> uint8_t* frame,</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="keywordtype">size_t</span> frame_size,</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  std::vector<SubsampleEntry>* subsamples) {</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  DCHECK(av1_parser_);</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  std::vector<AV1Parser::Tile> av1_tiles;</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="keywordflow">if</span> (!av1_parser_->Parse(frame, frame_size, &av1_tiles))</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::ENCRYPTION_FAILURE, <span class="stringliteral">"Failed to parse AV1 frame."</span>);</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  SubsampleOrganizer subsample_organizer(align_protected_data_, subsamples);</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span> </div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordtype">size_t</span> last_tile_end_offset = 0;</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code" href="../../d7/d36/structshaka_1_1media_1_1AV1Parser_1_1Tile.html">AV1Parser::Tile</a>& tile : av1_tiles) {</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  DCHECK_LE(last_tile_end_offset, tile.start_offset_in_bytes);</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="comment">// Per AV1 in ISO-BMFF spec [1], only decode_tile is encrypted.</span></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="comment">// [1] https://aomediacodec.github.io/av1-isobmff/#subsample-encryption</span></div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  subsample_organizer.AddSubsample(</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  tile.start_offset_in_bytes - last_tile_end_offset, tile.size_in_bytes);</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  last_tile_end_offset = tile.start_offset_in_bytes + tile.size_in_bytes;</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  }</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  DCHECK_LE(last_tile_end_offset, frame_size);</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="keywordflow">if</span> (last_tile_end_offset < frame_size)</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  subsample_organizer.AddSubsample(frame_size - last_tile_end_offset, 0);</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keywordflow">return</span> Status::OK;</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span> }</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span> </div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span> } <span class="comment">// namespace media</span></div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span> } <span class="comment">// namespace shaka</span></div><div class="ttc" id="classshaka_1_1media_1_1H265VideoSliceHeaderParser_html"><div class="ttname"><a href="../../d1/d79/classshaka_1_1media_1_1H265VideoSliceHeaderParser.html">shaka::media::H265VideoSliceHeaderParser</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d33/video__slice__header__parser_8h_source.html#l00062">video_slice_header_parser.h:62</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1StreamInfo_html"><div class="ttname"><a href="../../d5/db1/classshaka_1_1media_1_1StreamInfo.html">shaka::media::StreamInfo</a></div><div class="ttdoc">Abstract class holds stream information. </div><div class="ttdef"><b>Definition:</b> <a href="../../d8/daa/stream__info_8h_source.html#l00062">stream_info.h:62</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Nalu_html_a63f091b3dbe862fd4519c1b374dfc937"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a63f091b3dbe862fd4519c1b374dfc937">shaka::media::Nalu::is_video_slice</a></div><div class="ttdeci">bool is_video_slice() const</div><div class="ttdoc">Slice data partition NALs are not considered as slice NALs. </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d87/nalu__reader_8h_source.html#l00117">nalu_reader.h:117</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1NaluReader_html"><div class="ttname"><a href="../../db/d86/classshaka_1_1media_1_1NaluReader.html">shaka::media::NaluReader</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d87/nalu__reader_8h_source.html#l00149">nalu_reader.h:149</a></div></div>
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<div class="ttc" id="structshaka_1_1media_1_1VPxFrameInfo_html"><div class="ttname"><a href="../../d0/d11/structshaka_1_1media_1_1VPxFrameInfo.html">shaka::media::VPxFrameInfo</a></div><div class="ttdef"><b>Definition:</b> <a href="../../df/d8a/vpx__parser_8h_source.html#l00019">vpx_parser.h:19</a></div></div>
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<div class="ttc" id="namespaceshaka_html"><div class="ttname"><a href="../../d8/daf/namespaceshaka.html">shaka</a></div><div class="ttdoc">All the methods that are virtual are virtual for mocking. </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d15/gflags__hex__bytes_8cc_source.html#l00011">gflags_hex_bytes.cc:11</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Nalu_html_a835d8f01a8ab94887ee3dce3b5d3721e"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a835d8f01a8ab94887ee3dce3b5d3721e">shaka::media::Nalu::header_size</a></div><div class="ttdeci">uint64_t header_size() const</div><div class="ttdoc">The size of the header, e.g. 1 for H.264. </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d87/nalu__reader_8h_source.html#l00100">nalu_reader.h:100</a></div></div>
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<div class="ttc" id="classshaka_1_1Status_html"><div class="ttname"><a href="../../d2/d20/classshaka_1_1Status.html">shaka::Status</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d13/status_8h_source.html#l00110">status.h:110</a></div></div>
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<div class="ttc" id="structshaka_1_1media_1_1AV1Parser_1_1Tile_html"><div class="ttname"><a href="../../d7/d36/structshaka_1_1media_1_1AV1Parser_1_1Tile.html">shaka::media::AV1Parser::Tile</a></div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d18/av1__parser_8h_source.html#l00024">av1_parser.h:24</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1SubsampleGenerator_html_a8d4d840fd11c1c89b8ed03cdf076c64e"><div class="ttname"><a href="../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a8d4d840fd11c1c89b8ed03cdf076c64e">shaka::media::SubsampleGenerator::GenerateSubsamples</a></div><div class="ttdeci">virtual Status GenerateSubsamples(const uint8_t *frame, size_t frame_size, std::vector< SubsampleEntry > *subsamples)</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d1e/subsample__generator_8cc_source.html#l00213">subsample_generator.cc:213</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1H264VideoSliceHeaderParser_html"><div class="ttname"><a href="../../da/df0/classshaka_1_1media_1_1H264VideoSliceHeaderParser.html">shaka::media::H264VideoSliceHeaderParser</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d33/video__slice__header__parser_8h_source.html#l00044">video_slice_header_parser.h:44</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1NaluReader_html_ae051f1f92d84acfcd4cc159d972d647a"><div class="ttname"><a href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#ae051f1f92d84acfcd4cc159d972d647a">shaka::media::NaluReader::Advance</a></div><div class="ttdeci">Result Advance(Nalu *nalu)</div><div class="ttdef"><b>Definition:</b> <a href="../../d1/df5/nalu__reader_8cc_source.html#l00241">nalu_reader.cc:241</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1VP9Parser_html"><div class="ttname"><a href="../../db/d5a/classshaka_1_1media_1_1VP9Parser.html">shaka::media::VP9Parser</a></div><div class="ttdoc">Class to parse a vp9 bit stream. </div><div class="ttdef"><b>Definition:</b> <a href="../../df/d8a/vp9__parser_8h_source.html#l00020">vp9_parser.h:20</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Nalu_html"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html">shaka::media::Nalu</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d87/nalu__reader_8h_source.html#l00027">nalu_reader.h:27</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1SubsampleGenerator_html_a1674b4a68974db06ad4efa9a9b699a46"><div class="ttname"><a href="../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a1674b4a68974db06ad4efa9a9b699a46">shaka::media::SubsampleGenerator::SubsampleGenerator</a></div><div class="ttdeci">SubsampleGenerator(bool vp9_subsample_encryption)</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d1e/subsample__generator_8cc_source.html#l00123">subsample_generator.cc:123</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Nalu_html_a7a3b4358f56619fc63fe74525f4eb92b"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a7a3b4358f56619fc63fe74525f4eb92b">shaka::media::Nalu::type</a></div><div class="ttdeci">int type() const</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d87/nalu__reader_8h_source.html#l00113">nalu_reader.h:113</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1SubsampleGenerator_html_ac4478f9099344a05be5b9b3e4e209817"><div class="ttname"><a href="../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#ac4478f9099344a05be5b9b3e4e209817">shaka::media::SubsampleGenerator::Initialize</a></div><div class="ttdeci">virtual Status Initialize(FourCC protection_scheme, const StreamInfo &stream_info)</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d1e/subsample__generator_8cc_source.html#l00128">subsample_generator.cc:128</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1AV1Parser_html"><div class="ttname"><a href="../../db/dc7/classshaka_1_1media_1_1AV1Parser.html">shaka::media::AV1Parser</a></div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d18/av1__parser_8h_source.html#l00022">av1_parser.h:22</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Nalu_html_abe782e4298e7add8ce0a1c33e66cfcdb"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#abe782e4298e7add8ce0a1c33e66cfcdb">shaka::media::Nalu::payload_size</a></div><div class="ttdeci">uint64_t payload_size() const</div><div class="ttdoc">Size of this Nalu minus header_size(). </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d87/nalu__reader_8h_source.html#l00102">nalu_reader.h:102</a></div></div>
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