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<div class="title">nalu_reader.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 2016 Google Inc. All rights reserved.</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Use of this source code is governed by a BSD-style</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// license that can be found in the LICENSE file or at</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// https://developers.google.com/open-source/licenses/bsd</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "packager/media/codecs/nalu_reader.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 <iostream></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/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/codecs/h264_parser.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>shaka {</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>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> IsStartCode(<span class="keyword">const</span> uint8_t* data) {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keywordflow">return</span> data[0] == 0x00 && data[1] == 0x00 && data[2] == 0x01;</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> }</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> } <span class="comment">// namespace</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> Nalu::Nalu()</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  : data_(nullptr),</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  header_size_(0),</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  payload_size_(0),</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  ref_idc_(0),</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  nuh_layer_id_(0),</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  nuh_temporal_id_(0),</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  type_(0),</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  is_video_slice_(false) {}</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keywordtype">bool</span> Nalu::Initialize(CodecType type,</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">const</span> uint8_t* data,</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  uint64_t size) {</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">if</span> (type == Nalu::kH264) {</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">return</span> InitializeFromH264(data, size);</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  DCHECK_EQ(Nalu::kH265, type);</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">return</span> InitializeFromH265(data, size);</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> }</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> <span class="comment">// ITU-T H.264 (02/2014) 7.4.1 NAL unit semantics</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="keywordtype">bool</span> Nalu::InitializeFromH264(<span class="keyword">const</span> uint8_t* data, uint64_t size) {</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  DCHECK(data);</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">if</span> (size == 0)</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">const</span> uint8_t header = data[0];</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">if</span> ((header & 0x80) != 0) {</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  LOG(WARNING) << <span class="stringliteral">"forbidden_zero_bit shall be equal to 0 (header 0x"</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  << std::hex << static_cast<int>(header) << <span class="stringliteral">")."</span>;</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  }</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  data_ = <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a3175755a2a847c3bfc8292434d4ea3b6">data</a>;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  header_size_ = 1;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  payload_size_ = size - header_size_;</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  ref_idc_ = (header >> 5) & 0x3;</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  type_ = header & 0x1F;</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">// Reserved NAL units are not treated as valid NAL units here.</span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">if</span> (type_ == Nalu::H264_Unspecified || type_ == Nalu::H264_Reserved17 ||</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  type_ == Nalu::H264_Reserved18 || type_ >= Nalu::H264_Reserved22) {</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  LOG(WARNING) << <span class="stringliteral">"Unspecified or reserved nal_unit_type "</span> << type_</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  << <span class="stringliteral">" (header 0x"</span> << std::hex << static_cast<int>(header)</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  << <span class="stringliteral">")."</span>;</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type_ == Nalu::H264_IDRSlice || type_ == Nalu::H264_SPS ||</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  type_ == Nalu::H264_SPSExtension || type_ == Nalu::H264_SubsetSPS ||</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  type_ == Nalu::H264_PPS) {</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">if</span> (ref_idc_ == 0) {</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  LOG(WARNING) << <span class="stringliteral">"nal_ref_idc shall not be equal to 0 for nalu type "</span></div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  << type_ << <span class="stringliteral">" (header 0x"</span> << std::hex</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  << <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(header) << <span class="stringliteral">")."</span>;</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  }</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type_ == Nalu::H264_SEIMessage ||</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  (type_ >= Nalu::H264_AUD && type_ <= Nalu::H264_FillerData)) {</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">if</span> (ref_idc_ != 0) {</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  LOG(WARNING) << <span class="stringliteral">"nal_ref_idc shall be equal to 0 for nalu type "</span> << type_</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  << <span class="stringliteral">" (header 0x"</span> << std::hex << static_cast<int>(header)</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  << <span class="stringliteral">")."</span>;</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  }</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>  is_video_slice_ = (type_ >= Nalu::H264_NonIDRSlice &&</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  type_ <= Nalu::H264_IDRSlice);</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  can_start_access_unit_ =</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  (is_video_slice_ || type_ == Nalu::H264_AUD || type_ == Nalu::H264_SPS ||</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  type_ == Nalu::H264_PPS || type_ == Nalu::H264_SEIMessage ||</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  (type_ >= Nalu::H264_PrefixNALUnit && type_ <= Nalu::H264_Reserved18));</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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> </div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">// ITU-T H.265 (04/2015) 7.4.2.2 NAL unit header semantics</span></div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="keywordtype">bool</span> Nalu::InitializeFromH265(<span class="keyword">const</span> uint8_t* data, uint64_t size) {</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  DCHECK(data);</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">if</span> (size < 2)</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keyword">const</span> uint16_t header = (data[0] << 8) | data[1];</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">if</span> ((header & 0x8000) != 0) {</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  LOG(WARNING) << <span class="stringliteral">"forbidden_zero_bit shall be equal to 0 (header 0x"</span></div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  << std::hex << header << <span class="stringliteral">")."</span>;</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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>  data_ = <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a3175755a2a847c3bfc8292434d4ea3b6">data</a>;</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  header_size_ = 2;</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  payload_size_ = size - header_size_;</div>
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|
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div>
|
|
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  type_ = (header >> 9) & 0x3F;</div>
|
|
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  nuh_layer_id_ = (header >> 3) & 0x3F;</div>
|
|
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> nuh_temporal_id_plus1 = header & 0x7;</div>
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|
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">if</span> (nuh_temporal_id_plus1 == 0) {</div>
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|
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  LOG(WARNING) << <span class="stringliteral">"nul_temporal_id_plus1 shall not be equal to 0 (header 0x"</span></div>
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|
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  << std::hex << header << <span class="stringliteral">")."</span>;</div>
|
|
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div>
|
|
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  nuh_temporal_id_ = nuh_temporal_id_plus1 - 1;</div>
|
|
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div>
|
|
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">if</span> (type_ == Nalu::H265_EOB && nuh_layer_id_ != 0) {</div>
|
|
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  LOG(WARNING) << <span class="stringliteral">"nuh_layer_id shall be equal to 0 for nalu type "</span> << type_</div>
|
|
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  << <span class="stringliteral">" (header 0x"</span> << std::hex << header << <span class="stringliteral">")."</span>;</div>
|
|
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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|
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  }</div>
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|
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div>
|
|
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="comment">// Reserved NAL units are not treated as valid NAL units here.</span></div>
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|
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span> ((type_ >= Nalu::H265_RSV_VCL_N10 && type_ <= Nalu::H265_RSV_VCL_R15) ||</div>
|
|
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  (type_ >= Nalu::H265_RSV_IRAP_VCL22 && type_ < Nalu::H265_RSV_VCL31) ||</div>
|
|
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  (type_ >= Nalu::H265_RSV_NVCL41)) {</div>
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|
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  LOG(WARNING) << <span class="stringliteral">"Unspecified or reserved nal_unit_type "</span> << type_</div>
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|
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  << <span class="stringliteral">" (header 0x"</span> << std::hex << header << <span class="stringliteral">")."</span>;</div>
|
|
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((type_ >= Nalu::H265_BLA_W_LP &&</div>
|
|
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  type_ <= Nalu::H265_RSV_IRAP_VCL23) ||</div>
|
|
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  type_ == Nalu::H265_VPS || type_ == Nalu::H265_SPS ||</div>
|
|
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  type_ == Nalu::H265_EOS || type_ == Nalu::H265_EOB) {</div>
|
|
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">if</span> (nuh_temporal_id_ != 0) {</div>
|
|
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  LOG(WARNING) << <span class="stringliteral">"TemporalId shall be equal to 0 for nalu type "</span> << type_</div>
|
|
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  << <span class="stringliteral">" (header 0x"</span> << std::hex << header << <span class="stringliteral">")."</span>;</div>
|
|
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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|
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  }</div>
|
|
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type_ == Nalu::H265_TSA_N || type_ == Nalu::H265_TSA_R ||</div>
|
|
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  (nuh_layer_id_ == 0 &&</div>
|
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  (type_ == Nalu::H265_STSA_N || type_ == Nalu::H265_STSA_R))) {</div>
|
|
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">if</span> (nuh_temporal_id_ == 0) {</div>
|
|
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  LOG(WARNING) << <span class="stringliteral">"TemporalId shall not be equal to 0 for nalu type "</span></div>
|
|
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  << type_ << <span class="stringliteral">" (header 0x"</span> << std::hex << header << <span class="stringliteral">")."</span>;</div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  }</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  }</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> </div>
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|
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  is_video_slice_ = type_ >= Nalu::H265_TRAIL_N && type_ <= Nalu::H265_CRA_NUT;</div>
|
|
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  can_start_access_unit_ =</div>
|
|
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  nuh_layer_id_ == 0 &&</div>
|
|
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  (is_video_slice_ || type_ == Nalu::H265_AUD || type_ == Nalu::H265_VPS ||</div>
|
|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  type_ == Nalu::H265_SPS || type_ == Nalu::H265_PPS ||</div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  type_ == Nalu::H265_PREFIX_SEI ||</div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  (type_ >= Nalu::H265_RSV_NVCL41 && type_ <= Nalu::H265_RSV_NVCL44) ||</div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  (type_ >= Nalu::H265_UNSPEC48 && type_ <= Nalu::H265_UNSPEC55));</div>
|
|
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> }</div>
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|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div>
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|
<div class="line"><a name="l00167"></a><span class="lineno"><a class="line" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a2d1611fe3e60fc6570fe0c21e13911b0"> 167</a></span> <a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a2d1611fe3e60fc6570fe0c21e13911b0">NaluReader::NaluReader</a>(Nalu::CodecType type,</div>
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|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  uint8_t nal_length_size,</div>
|
|
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keyword">const</span> uint8_t* stream,</div>
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|
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  uint64_t stream_size)</div>
|
|
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  : stream_(stream),</div>
|
|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  stream_size_(stream_size),</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  nalu_type_(type),</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  nalu_length_size_(nal_length_size),</div>
|
|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  format_(nal_length_size == 0 ? kAnnexbByteStreamFormat</div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  : kNalUnitStreamFormat) {</div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  DCHECK(stream);</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> NaluReader::~NaluReader() {}</div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"><a class="line" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#ae051f1f92d84acfcd4cc159d972d647a"> 181</a></span> NaluReader::Result <a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#ae051f1f92d84acfcd4cc159d972d647a">NaluReader::Advance</a>(<a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html">Nalu</a>* nalu) {</div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">if</span> (stream_size_ <= 0)</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">return</span> NaluReader::kEOStream;</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> </div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  uint8_t nalu_length_size_or_start_code_size;</div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  uint64_t nalu_length;</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">if</span> (format_ == kAnnexbByteStreamFormat) {</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="comment">// This will move |stream_| to the start code.</span></div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  uint64_t nalu_length_with_header;</div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">if</span> (!LocateNaluByStartCode(&nalu_length_with_header,</div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  &nalu_length_size_or_start_code_size)) {</div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  LOG(ERROR) << <span class="stringliteral">"Could not find next NALU, bytes left in stream: "</span></div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  << stream_size_;</div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="comment">// This is actually an error. Since we always move to past the end of</span></div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="comment">// each NALU, if there is no next start code, then this is the first call</span></div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">// and there are no start codes in the stream.</span></div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">return</span> NaluReader::kInvalidStream;</div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  }</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  nalu_length = nalu_length_with_header - nalu_length_size_or_start_code_size;</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  } <span class="keywordflow">else</span> {</div>
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|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html">BufferReader</a> reader(stream_, stream_size_);</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">if</span> (!reader.<a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ac98c6631c07300a6b78ec58bfd4ced30">ReadNBytesInto8</a>(&nalu_length, nalu_length_size_))</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">return</span> NaluReader::kInvalidStream;</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  nalu_length_size_or_start_code_size = nalu_length_size_;</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> </div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">if</span> (nalu_length + nalu_length_size_ > stream_size_) {</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  LOG(ERROR) << <span class="stringliteral">"NALU length exceeds stream size: "</span></div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  << stream_size_ << <span class="stringliteral">" < "</span> << nalu_length;</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">return</span> NaluReader::kInvalidStream;</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  }</div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">if</span> (nalu_length == 0) {</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  LOG(ERROR) << <span class="stringliteral">"NALU size 0"</span>;</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">return</span> NaluReader::kInvalidStream;</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  }</div>
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|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  }</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keyword">const</span> uint8_t* nalu_data = stream_ + nalu_length_size_or_start_code_size;</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">if</span> (!nalu->Initialize(nalu_type_, nalu_data, nalu_length))</div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">return</span> NaluReader::kInvalidStream;</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>  <span class="comment">// Move parser state to after this NALU, so next time Advance</span></div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="comment">// is called, we will effectively be skipping it.</span></div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  stream_ += nalu_length_size_or_start_code_size + nalu_length;</div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  stream_size_ -= nalu_length_size_or_start_code_size + nalu_length;</div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> </div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  DVLOG(4) << <span class="stringliteral">"NALU type: "</span> << <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(nalu-><a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a86143bb8a31825f06668e97bff66ce2c">type</a>())</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  << <span class="stringliteral">" at: "</span> << reinterpret_cast<const void*>(nalu-><a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a3175755a2a847c3bfc8292434d4ea3b6">data</a>())</div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  << <span class="stringliteral">" data size: "</span> << nalu-><a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a6bcba03125313ea515a61a67c9d2a821">payload_size</a>();</div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> </div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">return</span> NaluReader::kOk;</div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> }</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"><a class="line" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a9ed9d56a06f43717cdb7035f86075975"> 233</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a9ed9d56a06f43717cdb7035f86075975">NaluReader::StartsWithStartCode</a>() {</div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordflow">if</span> (stream_size_ >= 3) {</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">if</span> (IsStartCode(stream_))</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  }</div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">if</span> (stream_size_ >= 4) {</div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordflow">if</span> (stream_[0] == 0x00 && IsStartCode(stream_ + 1))</div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  }</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> </div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment">// static</span></div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="keywordtype">bool</span> NaluReader::FindStartCode(<span class="keyword">const</span> uint8_t* data,</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  uint64_t data_size,</div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  uint64_t* offset,</div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  uint8_t* start_code_size) {</div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  uint64_t bytes_left = data_size;</div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div>
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<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keywordflow">while</span> (bytes_left >= 3) {</div>
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">if</span> (IsStartCode(data)) {</div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="comment">// Found three-byte start code, set pointer at its beginning.</span></div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  *offset = data_size - bytes_left;</div>
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<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  *start_code_size = 3;</div>
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> </div>
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="comment">// If there is a zero byte before this start code,</span></div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="comment">// then it's actually a four-byte start code, so backtrack one byte.</span></div>
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">if</span> (*offset > 0 && *(data - 1) == 0x00) {</div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  --(*offset);</div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  ++(*start_code_size);</div>
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  }</div>
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<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  }</div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> </div>
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  ++data;</div>
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<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  --bytes_left;</div>
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<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  }</div>
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="comment">// End of data: offset is pointing to the first byte that was not considered</span></div>
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="comment">// as a possible start of a start code.</span></div>
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  *offset = data_size - bytes_left;</div>
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  *start_code_size = 0;</div>
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> }</div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="keywordtype">bool</span> NaluReader::LocateNaluByStartCode(uint64_t* nalu_size,</div>
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  uint8_t* start_code_size) {</div>
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<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="comment">// Find the start code of next NALU.</span></div>
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<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  uint64_t nalu_start_off = 0;</div>
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<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  uint8_t annexb_start_code_size = 0;</div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">if</span> (!FindStartCode(stream_, stream_size_,</div>
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<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  &nalu_start_off, &annexb_start_code_size)) {</div>
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  DVLOG(4) << <span class="stringliteral">"Could not find start code, end of stream?"</span>;</div>
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<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  }</div>
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<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> </div>
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="comment">// Move the stream to the beginning of the NALU (pointing at the start code).</span></div>
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<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  stream_ += nalu_start_off;</div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  stream_size_ -= nalu_start_off;</div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> </div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keyword">const</span> uint8_t* nalu_data = stream_ + annexb_start_code_size;</div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  uint64_t max_nalu_data_size = stream_size_ - annexb_start_code_size;</div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">if</span> (max_nalu_data_size <= 0) {</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  DVLOG(3) << <span class="stringliteral">"End of stream"</span>;</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  }</div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div>
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<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="comment">// Find the start code of next NALU;</span></div>
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<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="comment">// if successful, |nalu_size_without_start_code| is the number of bytes from</span></div>
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<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="comment">// after previous start code to before this one;</span></div>
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|
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="comment">// if next start code is not found, it is still a valid NALU since there</span></div>
|
|
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="comment">// are some bytes left after the first start code: all the remaining bytes</span></div>
|
|
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="comment">// belong to the current NALU.</span></div>
|
|
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  uint64_t nalu_size_without_start_code = 0;</div>
|
|
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  uint8_t next_start_code_size = 0;</div>
|
|
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
|
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">if</span> (!FindStartCode(nalu_data, max_nalu_data_size,</div>
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|
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  &nalu_size_without_start_code, &next_start_code_size)) {</div>
|
|
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  nalu_data += max_nalu_data_size;</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>  }</div>
|
|
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> </div>
|
|
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  nalu_data += nalu_size_without_start_code + next_start_code_size;</div>
|
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<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  max_nalu_data_size -= nalu_size_without_start_code + next_start_code_size;</div>
|
|
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="comment">// If it is not a valid NAL unit, we will continue searching. This is to</span></div>
|
|
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="comment">// handle the case where emulation prevention are not applied.</span></div>
|
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<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  Nalu nalu;</div>
|
|
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">if</span> (nalu.Initialize(nalu_type_, nalu_data, max_nalu_data_size)) {</div>
|
|
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  nalu_data -= next_start_code_size;</div>
|
|
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  }</div>
|
|
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  LOG(WARNING) << <span class="stringliteral">"Seeing invalid NAL unit. Emulation prevention may not "</span></div>
|
|
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="stringliteral">"have been applied properly. Assuming it is part of the "</span></div>
|
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<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="stringliteral">"previous NAL unit."</span>;</div>
|
|
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  }</div>
|
|
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  *nalu_size = nalu_data - stream_;</div>
|
|
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  *start_code_size = annexb_start_code_size;</div>
|
|
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordflow">return</span> <span class="keyword">true</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> </div>
|
|
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> } <span class="comment">// namespace media</span></div>
|
|
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> } <span class="comment">// namespace shaka</span></div>
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<div class="ttc" id="classshaka_1_1media_1_1Nalu_html_a6bcba03125313ea515a61a67c9d2a821"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a6bcba03125313ea515a61a67c9d2a821">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#l00101">nalu_reader.h:101</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1NaluReader_html_a9ed9d56a06f43717cdb7035f86075975"><div class="ttname"><a href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a9ed9d56a06f43717cdb7035f86075975">shaka::media::NaluReader::StartsWithStartCode</a></div><div class="ttdeci">bool StartsWithStartCode()</div><div class="ttdef"><b>Definition:</b> <a href="../../d1/df5/nalu__reader_8cc_source.html#l00233">nalu_reader.cc:233</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Nalu_html_a86143bb8a31825f06668e97bff66ce2c"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a86143bb8a31825f06668e97bff66ce2c">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#l00112">nalu_reader.h:112</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BufferReader_html_ac98c6631c07300a6b78ec58bfd4ced30"><div class="ttname"><a href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ac98c6631c07300a6b78ec58bfd4ced30">shaka::media::BufferReader::ReadNBytesInto8</a></div><div class="ttdeci">bool ReadNBytesInto8(uint64_t *v, size_t num_bytes) WARN_UNUSED_RESULT</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dbc/buffer__reader_8cc_source.html#l00040">buffer_reader.cc:40</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#l00181">nalu_reader.cc:181</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#l00026">nalu_reader.h:26</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1NaluReader_html_a2d1611fe3e60fc6570fe0c21e13911b0"><div class="ttname"><a href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a2d1611fe3e60fc6570fe0c21e13911b0">shaka::media::NaluReader::NaluReader</a></div><div class="ttdeci">NaluReader(Nalu::CodecType type, uint8_t nal_length_size, const uint8_t *stream, uint64_t stream_size)</div><div class="ttdef"><b>Definition:</b> <a href="../../d1/df5/nalu__reader_8cc_source.html#l00167">nalu_reader.cc:167</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BufferReader_html"><div class="ttname"><a href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html">shaka::media::BufferReader</a></div><div class="ttdef"><b>Definition:</b> <a href="../../de/d3e/buffer__reader_8h_source.html#l00023">buffer_reader.h:23</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Nalu_html_a3175755a2a847c3bfc8292434d4ea3b6"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a3175755a2a847c3bfc8292434d4ea3b6">shaka::media::Nalu::data</a></div><div class="ttdeci">const uint8_t * data() const </div><div class="ttdoc">This is the pointer to the Nalu data, pointing to the header. </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d87/nalu__reader_8h_source.html#l00096">nalu_reader.h:96</a></div></div>
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