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<li class="navelem"><a class="el" href="../../dir_3f8eec2fc361645de4b1ec14c19fffc7.html">packager</a></li><li class="navelem"><a class="el" href="../../dir_f99dae54fe7170f791f339b952d5067a.html">media</a></li><li class="navelem"><a class="el" href="../../dir_375ba2cfd8fd5b05c50b92d996b9d386.html">formats</a></li><li class="navelem"><a class="el" href="../../dir_35c1fdffcdd4ade6d7f948073ab165de.html">mp2t</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2017 Google Inc. All rights reserved.</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Use of this source code is governed by a BSD-style</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// license that can be found in the LICENSE file or at</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// https://developers.google.com/open-source/licenses/bsd</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "packager/media/formats/mp2t/ac3_header.h"</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "packager/media/base/bit_reader.h"</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "packager/media/base/bit_writer.h"</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "packager/media/formats/mp2t/mp2t_common.h"</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">namespace </span><a class="code" href="../../d8/daf/namespaceshaka.html">shaka</a> {</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">namespace </span>media {</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">namespace </span>mp2t {</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">namespace </span>{</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// ASTC Standard A/52:2012 Table 5.6 Sample Rate Codes.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">const</span> uint32_t kAc3SampleRateTable[] = {48000, 44100, 32000};</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// ASTC Standard A/52:2012 Table 5.8 Audio Coding Mode.</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">const</span> uint8_t kAc3NumChannelsTable[] = {2, 1, 2, 3, 3, 4, 4, 5};</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">// ATSC Standard A/52:2012 Table 5.18 Frame Size Code Table</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">// (in words = 16 bits).</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> kFrameSizeCodeTable[][3] = {</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="comment">// {32kHz, 44.1kHz, 48kHz}</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  {96, 69, 64}, {96, 70, 64}, {120, 87, 80},</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  {120, 88, 80}, {144, 104, 96}, {144, 105, 96},</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  {168, 121, 112}, {168, 122, 112}, {192, 139, 128},</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  {192, 140, 128}, {240, 174, 160}, {240, 175, 160},</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  {288, 208, 192}, {288, 209, 192}, {336, 243, 224},</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  {336, 244, 224}, {384, 278, 256}, {384, 279, 256},</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  {480, 348, 320}, {480, 349, 320}, {576, 417, 384},</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  {576, 418, 384}, {672, 487, 448}, {672, 488, 448},</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  {768, 557, 512}, {768, 558, 512}, {960, 696, 640},</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  {960, 697, 640}, {1152, 835, 768}, {1152, 836, 768},</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  {1344, 975, 896}, {1344, 976, 896}, {1536, 1114, 1024},</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  {1536, 1115, 1024}, {1728, 1253, 1152}, {1728, 1254, 1152},</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  {1920, 1393, 1280}, {1920, 1394, 1280},</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> };</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a44c8ac7a2dd57a1b099722632e7e39f0"> 45</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a44c8ac7a2dd57a1b099722632e7e39f0">Ac3Header::IsSyncWord</a>(<span class="keyword">const</span> uint8_t* buf)<span class="keyword"> const </span>{</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  DCHECK(buf);</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// ATSC Standard A/52:2012 5.4.1 syncinfo: Synchronization Information.</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">return</span> buf[0] == 0x0B && buf[1] == 0x77;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> }</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a3c589cda189b06d9ca3b90a56db24829"> 51</a></span> <span class="keywordtype">size_t</span> <a class="code" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a3c589cda189b06d9ca3b90a56db24829">Ac3Header::GetMinFrameSize</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="comment">// Arbitrary. Actual frame size starts with 96 words.</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> kMinAc3FrameSize = 10u;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">return</span> kMinAc3FrameSize;</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> }</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div><div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#ac5d9c726fd88989e36e490d2aeb1011f"> 57</a></span> <span class="keywordtype">size_t</span> <a class="code" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#ac5d9c726fd88989e36e490d2aeb1011f">Ac3Header::GetSamplesPerFrame</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// ATSC Standard A/52:2012</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="comment">// Annex A: AC-3 Elementary Streams in the MPEG-2 Multiplex.</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> kSamplesPerAc3Frame = 1536;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">return</span> kSamplesPerAc3Frame;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> }</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div><div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a04733336c57460238d0279decaa3939c"> 64</a></span> <span class="keywordtype">bool</span> <a class="code" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a04733336c57460238d0279decaa3939c">Ac3Header::Parse</a>(<span class="keyword">const</span> uint8_t* audio_frame, <span class="keywordtype">size_t</span> audio_frame_size) {</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html">BitReader</a> frame(audio_frame, audio_frame_size);</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// ASTC Standard A/52:2012 5. BIT STREAM SYNTAX.</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="comment">// syncinfo: synchronization information section.</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  uint16_t syncword;</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">ReadBits</a>(16, &syncword));</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  RCHECK(syncword == 0x0B77);</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  uint16_t crc1;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">ReadBits</a>(16, &crc1));</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">ReadBits</a>(2, &fscod_));</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  RCHECK(fscod_ < arraysize(kAc3SampleRateTable));</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">ReadBits</a>(6, &frmsizecod_));</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  RCHECK(frmsizecod_ < arraysize(kFrameSizeCodeTable));</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="comment">// bsi: bit stream information section.</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">ReadBits</a>(5, &bsid_));</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">ReadBits</a>(3, &bsmod_));</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">ReadBits</a>(3, &acmod_));</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  RCHECK(acmod_ < arraysize(kAc3NumChannelsTable));</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="comment">// If 3 front channels.</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">if</span> ((acmod_ & 0x01) && (acmod_ != 0x01))</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#a4ab20ef220c76072eaecb982aba0541d">SkipBits</a>(2)); <span class="comment">// cmixlev.</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="comment">// If a surround channel exists.</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">if</span> (acmod_ & 0x04)</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#a4ab20ef220c76072eaecb982aba0541d">SkipBits</a>(2)); <span class="comment">// surmixlev.</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// If in 2/0 mode.</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">if</span> (acmod_ == 0x02)</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#a4ab20ef220c76072eaecb982aba0541d">SkipBits</a>(2)); <span class="comment">// dsurmod.</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  RCHECK(frame.<a class="code" href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">ReadBits</a>(1, &lfeon_));</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> }</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00100"></a><span class="lineno"><a class="line" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a58d93e453c2fed3d500badb40a349eed"> 100</a></span> <span class="keywordtype">size_t</span> <a class="code" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a58d93e453c2fed3d500badb40a349eed">Ac3Header::GetHeaderSize</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="comment">// Unlike ADTS, for AC3, the whole frame is included in the media sample, so</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="comment">// return 0 header size.</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> }</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"><a class="line" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a8065975e78028683180cd3ae65925c37"> 106</a></span> <span class="keywordtype">size_t</span> <a class="code" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a8065975e78028683180cd3ae65925c37">Ac3Header::GetFrameSize</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> kNumFscode = arraysize(kAc3SampleRateTable);</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  DCHECK_LT(fscod_, kNumFscode);</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  DCHECK_LT(frmsizecod_, arraysize(kFrameSizeCodeTable));</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="comment">// The order of frequencies are reversed in |kFrameSizeCodeTable| compared to</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="comment">// |kAc3SampleRateTable|.</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> index = kNumFscode - 1 - fscod_;</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">return</span> kFrameSizeCodeTable[frmsizecod_][index] * 2;</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> }</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div><div class="line"><a name="l00116"></a><span class="lineno"><a class="line" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a9a3da0ed02d1790ec176a75bbbdef146"> 116</a></span> <span class="keywordtype">void</span> <a class="code" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a9a3da0ed02d1790ec176a75bbbdef146">Ac3Header::GetAudioSpecificConfig</a>(std::vector<uint8_t>* buffer)<span class="keyword"> const </span>{</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  DCHECK(buffer);</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  buffer->clear();</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html">BitWriter</a> config(buffer);</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="comment">// Accoding to ETSI TS 102 366 V1.3.1 (2014-08) F.4 AC3SpecificBox.</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  config.<a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1">WriteBits</a>(fscod_, 2);</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  config.<a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1">WriteBits</a>(bsid_, 5);</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  config.<a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1">WriteBits</a>(bsmod_, 3);</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  config.<a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1">WriteBits</a>(acmod_, 3);</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  config.<a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1">WriteBits</a>(lfeon_, 1);</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keyword">const</span> uint8_t bit_rate_code = frmsizecod_ >> 1;</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  config.<a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1">WriteBits</a>(bit_rate_code, 5);</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  config.<a class="code" href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#a1c14f04a0bb3090edb3ac0fffa346bc1">Flush</a>();</div><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> </div><div class="line"><a name="l00131"></a><span class="lineno"><a class="line" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a56de14f98afd205f03bda6b110835aae"> 131</a></span> uint8_t <a class="code" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a56de14f98afd205f03bda6b110835aae">Ac3Header::GetObjectType</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="comment">// Only useful for AAC. Return a dummy value instead.</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> }</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div><div class="line"><a name="l00136"></a><span class="lineno"><a class="line" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#aa238ec0832e097f2f5791e915bf30127"> 136</a></span> uint32_t <a class="code" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#aa238ec0832e097f2f5791e915bf30127">Ac3Header::GetSamplingFrequency</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  DCHECK_LT(fscod_, arraysize(kAc3SampleRateTable));</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">return</span> kAc3SampleRateTable[fscod_];</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> }</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div><div class="line"><a name="l00141"></a><span class="lineno"><a class="line" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#abab9685652b78baf25b7399477401bd7"> 141</a></span> uint8_t <a class="code" href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#abab9685652b78baf25b7399477401bd7">Ac3Header::GetNumChannels</a>()<span class="keyword"> const </span>{</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  DCHECK_LT(acmod_, arraysize(kAc3NumChannelsTable));</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">return</span> kAc3NumChannelsTable[acmod_] + (lfeon_ ? 1 : 0);</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> }</div><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="comment">// namespace mp2t</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> } <span class="comment">// namespace media</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> } <span class="comment">// namespace shaka</span></div><div class="ttc" id="classshaka_1_1media_1_1BitReader_html_ae40382c4ca4a57b3bb3531a337aebbe4"><div class="ttname"><a href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4">shaka::media::BitReader::ReadBits</a></div><div class="ttdeci">bool ReadBits(size_t num_bits, T *out)</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/dd3/bit__reader_8h_source.html#l00035">bit_reader.h:35</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a58d93e453c2fed3d500badb40a349eed"><div class="ttname"><a href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a58d93e453c2fed3d500badb40a349eed">shaka::media::mp2t::Ac3Header::GetHeaderSize</a></div><div class="ttdeci">size_t GetHeaderSize() const override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/dda/ac3__header_8cc_source.html#l00100">ac3_header.cc:100</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BitReader_html"><div class="ttname"><a href="../../d6/da9/classshaka_1_1media_1_1BitReader.html">shaka::media::BitReader</a></div><div class="ttdoc">A class to read bit streams. </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/dd3/bit__reader_8h_source.html#l00017">bit_reader.h:17</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a44c8ac7a2dd57a1b099722632e7e39f0"><div class="ttname"><a href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a44c8ac7a2dd57a1b099722632e7e39f0">shaka::media::mp2t::Ac3Header::IsSyncWord</a></div><div class="ttdeci">bool IsSyncWord(const uint8_t *buf) const override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/dda/ac3__header_8cc_source.html#l00045">ac3_header.cc:45</a></div></div>
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<div class="ttc" id="namespaceshaka_html"><div class="ttname"><a href="../../d8/daf/namespaceshaka.html">shaka</a></div><div class="ttdoc">All the methods that are virtual are virtual for mocking. </div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d15/gflags__hex__bytes_8cc_source.html#l00011">gflags_hex_bytes.cc:11</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BitWriter_html"><div class="ttname"><a href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html">shaka::media::BitWriter</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d0/dbc/bit__writer_8h_source.html#l00019">bit_writer.h:19</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a3c589cda189b06d9ca3b90a56db24829"><div class="ttname"><a href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a3c589cda189b06d9ca3b90a56db24829">shaka::media::mp2t::Ac3Header::GetMinFrameSize</a></div><div class="ttdeci">size_t GetMinFrameSize() const override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/dda/ac3__header_8cc_source.html#l00051">ac3_header.cc:51</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1Ac3Header_html_aa238ec0832e097f2f5791e915bf30127"><div class="ttname"><a href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#aa238ec0832e097f2f5791e915bf30127">shaka::media::mp2t::Ac3Header::GetSamplingFrequency</a></div><div class="ttdeci">uint32_t GetSamplingFrequency() const override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/dda/ac3__header_8cc_source.html#l00136">ac3_header.cc:136</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a8065975e78028683180cd3ae65925c37"><div class="ttname"><a href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a8065975e78028683180cd3ae65925c37">shaka::media::mp2t::Ac3Header::GetFrameSize</a></div><div class="ttdeci">size_t GetFrameSize() const override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/dda/ac3__header_8cc_source.html#l00106">ac3_header.cc:106</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BitReader_html_a4ab20ef220c76072eaecb982aba0541d"><div class="ttname"><a href="../../d6/da9/classshaka_1_1media_1_1BitReader.html#a4ab20ef220c76072eaecb982aba0541d">shaka::media::BitReader::SkipBits</a></div><div class="ttdeci">bool SkipBits(size_t num_bits)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/de0/bit__reader_8cc_source.html#l00024">bit_reader.cc:24</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a56de14f98afd205f03bda6b110835aae"><div class="ttname"><a href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a56de14f98afd205f03bda6b110835aae">shaka::media::mp2t::Ac3Header::GetObjectType</a></div><div class="ttdeci">uint8_t GetObjectType() const override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/dda/ac3__header_8cc_source.html#l00131">ac3_header.cc:131</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a04733336c57460238d0279decaa3939c"><div class="ttname"><a href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a04733336c57460238d0279decaa3939c">shaka::media::mp2t::Ac3Header::Parse</a></div><div class="ttdeci">bool Parse(const uint8_t *adts_frame, size_t adts_frame_size) override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/dda/ac3__header_8cc_source.html#l00064">ac3_header.cc:64</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BitWriter_html_aee5f905e55f262e38f5df506611663f1"><div class="ttname"><a href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1">shaka::media::BitWriter::WriteBits</a></div><div class="ttdeci">void WriteBits(uint32_t bits, size_t number_of_bits)</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d58/bit__writer_8cc_source.html#l00015">bit_writer.cc:15</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1Ac3Header_html_ac5d9c726fd88989e36e490d2aeb1011f"><div class="ttname"><a href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#ac5d9c726fd88989e36e490d2aeb1011f">shaka::media::mp2t::Ac3Header::GetSamplesPerFrame</a></div><div class="ttdeci">size_t GetSamplesPerFrame() const override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/dda/ac3__header_8cc_source.html#l00057">ac3_header.cc:57</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1Ac3Header_html_abab9685652b78baf25b7399477401bd7"><div class="ttname"><a href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#abab9685652b78baf25b7399477401bd7">shaka::media::mp2t::Ac3Header::GetNumChannels</a></div><div class="ttdeci">uint8_t GetNumChannels() const override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/dda/ac3__header_8cc_source.html#l00141">ac3_header.cc:141</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a9a3da0ed02d1790ec176a75bbbdef146"><div class="ttname"><a href="../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a9a3da0ed02d1790ec176a75bbbdef146">shaka::media::mp2t::Ac3Header::GetAudioSpecificConfig</a></div><div class="ttdeci">void GetAudioSpecificConfig(std::vector< uint8_t > *buffer) const override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/dda/ac3__header_8cc_source.html#l00116">ac3_header.cc:116</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BitWriter_html_a1c14f04a0bb3090edb3ac0fffa346bc1"><div class="ttname"><a href="../../dc/d76/classshaka_1_1media_1_1BitWriter.html#a1c14f04a0bb3090edb3ac0fffa346bc1">shaka::media::BitWriter::Flush</a></div><div class="ttdeci">void Flush()</div><div class="ttdoc">Write pending bits, and align bitstream with extra zero bits. </div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d58/bit__writer_8cc_source.html#l00031">bit_writer.cc:31</a></div></div>
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