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<div class="title">nalu_reader.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">// Copyright 2016 Google Inc. All rights reserved.</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<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>&#160;<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>&#160;<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>&#160;</div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="preprocessor">#ifndef MEDIA_CODECS_NALU_READER_H_</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define MEDIA_CODECS_NALU_READER_H_</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="preprocessor">#include &lt;stdint.h&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#include &lt;stdlib.h&gt;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="preprocessor">#include &quot;packager/base/compiler_specific.h&quot;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="preprocessor">#include &quot;packager/base/macros.h&quot;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="keyword">namespace </span>shaka {</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="keyword">namespace </span>media {</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="comment">// Used as the |nalu_length_size| argument to NaluReader to indicate to use</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment">// AnnexB byte streams. An AnnexB byte stream starts with 3 or 4 byte start</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="comment">// codes instead of a fixed size NAL unit length.</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="keyword">const</span> uint8_t kIsAnnexbByteStream = 0;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html"> 26</a></span>&#160;<span class="keyword">class </span><a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html">Nalu</a> {</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; <span class="keyword">enum</span> H264NaluType {</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; H264_Unspecified = 0,</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; H264_NonIDRSlice = 1,</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; H264_IDRSlice = 5,</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; H264_SEIMessage = 6,</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; H264_SPS = 7,</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; H264_PPS = 8,</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; H264_AUD = 9,</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; H264_EOSeq = 10,</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; H264_FillerData = 12,</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; H264_SPSExtension = 13,</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; H264_PrefixNALUnit = 14,</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; H264_SubsetSPS = 15,</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; H264_DepthParameterSet = 16,</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; H264_Reserved17 = 17,</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; H264_Reserved18 = 18,</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; H264_CodedSliceExtension = 20,</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; H264_Reserved22 = 22,</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; };</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keyword">enum</span> H265NaluType {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; H265_TRAIL_N = 0,</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; H265_TRAIL_R = 1,</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; H265_TSA_N = 2,</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; H265_TSA_R = 3,</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; H265_STSA_N = 4,</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; H265_STSA_R = 5,</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; H265_RASL_R = 9,</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; H265_RSV_VCL_N10 = 10,</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; H265_RSV_VCL_R15 = 15,</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; H265_BLA_W_LP = 16,</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; H265_IDR_W_RADL = 19,</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; H265_IDR_N_LP = 20,</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; H265_CRA_NUT = 21,</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; H265_RSV_IRAP_VCL22 = 22,</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; H265_RSV_IRAP_VCL23 = 23,</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; H265_RSV_VCL31 = 31,</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; H265_VPS = 32,</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; H265_SPS = 33,</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; H265_PPS = 34,</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; H265_AUD = 35,</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; H265_EOS = 36,</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; H265_EOB = 37,</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; H265_FD = 38,</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; H265_PREFIX_SEI = 39,</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; H265_RSV_NVCL41 = 41,</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; H265_RSV_NVCL44 = 44,</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; H265_UNSPEC48 = 48,</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; H265_UNSPEC55 = 55,</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; };</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keyword">enum</span> CodecType {</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; kH264,</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; kH265,</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; };</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html">Nalu</a>();</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keywordtype">bool</span> Initialize(CodecType <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a86143bb8a31825f06668e97bff66ce2c">type</a>,</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keyword">const</span> uint8_t* <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a3175755a2a847c3bfc8292434d4ea3b6">data</a>,</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; uint64_t size) WARN_UNUSED_RESULT;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;</div>
<div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a3175755a2a847c3bfc8292434d4ea3b6"> 96</a></span>&#160; <span class="keyword">const</span> uint8_t* <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a3175755a2a847c3bfc8292434d4ea3b6">data</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> data_; }</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;</div>
<div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a9eb982bdbb66c10643b2fb8e2ae7a9ae"> 99</a></span>&#160; uint64_t <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a9eb982bdbb66c10643b2fb8e2ae7a9ae">header_size</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> header_size_; }</div>
<div class="line"><a name="l00101"></a><span class="lineno"><a class="line" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a6bcba03125313ea515a61a67c9d2a821"> 101</a></span>&#160; uint64_t <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a6bcba03125313ea515a61a67c9d2a821">payload_size</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> payload_size_; }</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="comment">// H.264 Specific:</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <span class="keywordtype">int</span> ref_idc()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> ref_idc_; }</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="comment">// H.265 Specific:</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <span class="keywordtype">int</span> nuh_layer_id()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> nuh_layer_id_; }</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="keywordtype">int</span> nuh_temporal_id()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> nuh_temporal_id_; }</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;</div>
<div class="line"><a name="l00112"></a><span class="lineno"><a class="line" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a86143bb8a31825f06668e97bff66ce2c"> 112</a></span>&#160; <span class="keywordtype">int</span> <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a86143bb8a31825f06668e97bff66ce2c">type</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> type_; }</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; <span class="keywordtype">bool</span> is_aud()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> is_aud_; }</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="keywordtype">bool</span> is_vcl()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> is_vcl_; }</div>
<div class="line"><a name="l00116"></a><span class="lineno"><a class="line" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a95f9428735ea6967d278198b09f48484"> 116</a></span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a95f9428735ea6967d278198b09f48484">is_video_slice</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> is_video_slice_; }</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="keywordtype">bool</span> can_start_access_unit()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> can_start_access_unit_; }</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; <span class="keywordtype">bool</span> InitializeFromH264(<span class="keyword">const</span> uint8_t* data, uint64_t size);</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keywordtype">bool</span> InitializeFromH265(<span class="keyword">const</span> uint8_t* data, uint64_t size);</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; <span class="comment">// A pointer to the NALU (i.e. points to the header). This pointer is not</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="comment">// owned by this instance.</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; <span class="keyword">const</span> uint8_t* data_ = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; <span class="comment">// NALU header size (e.g. 1 byte for H.264). Note that it does not include</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="comment">// header extension data in some NAL units.</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; uint64_t header_size_ = 0;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; <span class="comment">// Size of data after the header.</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; uint64_t payload_size_ = 0;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; <span class="keywordtype">int</span> ref_idc_ = 0;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; <span class="keywordtype">int</span> nuh_layer_id_ = 0;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keywordtype">int</span> nuh_temporal_id_ = 0;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="keywordtype">int</span> type_ = 0;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; <span class="keywordtype">bool</span> is_aud_ = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; <span class="keywordtype">bool</span> is_vcl_ = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; <span class="keywordtype">bool</span> is_video_slice_ = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; <span class="keywordtype">bool</span> can_start_access_unit_ = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="comment">// Don&#39;t use DISALLOW_COPY_AND_ASSIGN since it is just numbers and a pointer</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; <span class="comment">// it does not own. This allows Nalus to be stored in a vector.</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;};</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;</div>
<div class="line"><a name="l00148"></a><span class="lineno"><a class="line" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html"> 148</a></span>&#160;<span class="keyword">class </span><a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html">NaluReader</a> {</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; <span class="keyword">enum</span> Result {</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; kOk,</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; kInvalidStream, <span class="comment">// error in stream</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; kEOStream, <span class="comment">// end of stream</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; };</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; <a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a2d1611fe3e60fc6570fe0c21e13911b0">NaluReader</a>(Nalu::CodecType type,</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; uint8_t nal_length_size,</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; <span class="keyword">const</span> uint8_t* stream,</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; uint64_t stream_size);</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; ~<a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html">NaluReader</a>();</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160;</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; <span class="comment">// Find offset from start of data to next NALU start code</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; <span class="comment">// and size of found start code (3 or 4 bytes).</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; <span class="comment">// If no start code is found, offset is pointing to the first unprocessed byte</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; <span class="comment">// (i.e. the first byte that was not considered as a possible start of a start</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; <span class="comment">// code) and |*start_code_size| is set to 0.</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; <span class="comment">// Postconditions:</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <span class="comment">// - |*offset| is between 0 and |data_size| included.</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; <span class="comment">// It is strictly less than |data_size| if |data_size| &gt; 0.</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <span class="comment">// - |*start_code_size| is either 0, 3 or 4.</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; <span class="keyword">static</span> <span class="keywordtype">bool</span> FindStartCode(<span class="keyword">const</span> uint8_t* data,</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; uint64_t data_size,</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; uint64_t* offset,</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; uint8_t* start_code_size);</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; Result <a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#ae051f1f92d84acfcd4cc159d972d647a">Advance</a>(<a class="code" href="../../d6/dff/classshaka_1_1media_1_1Nalu.html">Nalu</a>* nalu);</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160;</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html#a9ed9d56a06f43717cdb7035f86075975">StartsWithStartCode</a>();</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; <span class="keyword">enum</span> Format {</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; kAnnexbByteStreamFormat,</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; kNalUnitStreamFormat</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; };</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160;</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; <span class="comment">// Move the stream pointer to the beginning of the next NALU,</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; <span class="comment">// i.e. pointing at the next start code.</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; <span class="comment">// Return true if a NALU has been found.</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; <span class="comment">// If a NALU is found:</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; <span class="comment">// - its size in bytes is returned in |*nalu_size| and includes</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; <span class="comment">// the start code as well as the trailing zero bits.</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; <span class="comment">// - the size in bytes of the start code is returned in |*start_code_size|.</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; <span class="keywordtype">bool</span> LocateNaluByStartCode(uint64_t* nalu_size, uint8_t* start_code_size);</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160;</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; <span class="comment">// Pointer to the current NALU in the stream.</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <span class="keyword">const</span> uint8_t* stream_;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; <span class="comment">// The remaining size of the stream.</span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; uint64_t stream_size_;</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; <span class="comment">// The type of NALU being read.</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; Nalu::CodecType nalu_type_;</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; <span class="comment">// The number of bytes the prefix length is; only valid if format is</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; <span class="comment">// kAnnexbByteStreamFormat.</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; uint8_t nalu_length_size_;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; <span class="comment">// The format of the stream.</span></div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; Format format_;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160;</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; DISALLOW_COPY_AND_ASSIGN(<a class="code" href="../../db/d86/classshaka_1_1media_1_1NaluReader.html">NaluReader</a>);</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160;};</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160;</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160;} <span class="comment">// namespace media</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160;} <span class="comment">// namespace shaka</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160;<span class="preprocessor">#endif // MEDIA_CODECS_NALU_READER_H_</span></div>
<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>
<div class="ttc" id="classshaka_1_1media_1_1Nalu_html_a95f9428735ea6967d278198b09f48484"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a95f9428735ea6967d278198b09f48484">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#l00116">nalu_reader.h:116</a></div></div>
<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#l00148">nalu_reader.h:148</a></div></div>
<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#l00229">nalu_reader.cc:229</a></div></div>
<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>
<div class="ttc" id="classshaka_1_1media_1_1Nalu_html_a9eb982bdbb66c10643b2fb8e2ae7a9ae"><div class="ttname"><a href="../../d6/dff/classshaka_1_1media_1_1Nalu.html#a9eb982bdbb66c10643b2fb8e2ae7a9ae">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#l00099">nalu_reader.h:99</a></div></div>
<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#l00177">nalu_reader.cc:177</a></div></div>
<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>
<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#l00163">nalu_reader.cc:163</a></div></div>
<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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