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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_64597db6ac7a9160e951a4226a03f10e.html">codecs</a></li> </ul>
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<div class="title">hls_audio_util.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 2018 Google LLC. 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/hls_audio_util.h"</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  </div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "packager/media/base/buffer_writer.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "packager/media/base/fourccs.h"</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "packager/media/codecs/aac_audio_specific_config.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  </div>
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<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>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  </div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keywordtype">bool</span> WriteAudioSetupInformation(Codec codec,</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  <span class="keyword">const</span> uint8_t* audio_specific_config,</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <span class="keywordtype">size_t</span> audio_specific_config_size,</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  BufferWriter* audio_setup_information) {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  uint32_t audio_type = FOURCC_NULL;</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keywordflow">switch</span> (codec) {</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="keywordflow">case</span> kCodecAAC: {</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  AACAudioSpecificConfig config;</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> result = config.Parse(std::vector<uint8_t>(</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  audio_specific_config,</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  audio_specific_config + audio_specific_config_size));</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  AACAudioSpecificConfig::AudioObjectType audio_object_type;</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordflow">if</span> (!result) {</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  LOG(WARNING) << <span class="stringliteral">"Failed to parse config. Assuming AAC-LC."</span>;</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  audio_object_type = AACAudioSpecificConfig::AOT_AAC_LC;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  audio_object_type = config.GetAudioObjectType();</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  }</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordflow">switch</span> (audio_object_type) {</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">case</span> AACAudioSpecificConfig::AOT_AAC_LC:</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  audio_type = FOURCC_zaac;</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keywordflow">case</span> AACAudioSpecificConfig::AOT_SBR:</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  audio_type = FOURCC_zach;</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">case</span> AACAudioSpecificConfig::AOT_PS:</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  audio_type = FOURCC_zacp;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">default</span>:</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  LOG(ERROR) << <span class="stringliteral">"Unknown object type for aac "</span> << audio_object_type;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  }</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  } <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">case</span> kCodecAC3:</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  audio_type = FOURCC_zac3;</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">case</span> kCodecEAC3:</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  audio_type = FOURCC_zec3;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">default</span>:</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  LOG(ERROR) << <span class="stringliteral">"Codec "</span> << codec << <span class="stringliteral">" is not supported in encrypted TS."</span>;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  }</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  </div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  DCHECK_NE(audio_type, FOURCC_NULL);</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  audio_setup_information->AppendInt(audio_type);</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// Priming. Since no info from encoder, set it to 0x0000.</span></div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  audio_setup_information->AppendInt(<span class="keyword">static_cast<</span>uint16_t<span class="keyword">></span>(0x0000));</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="comment">// Version is always 0x01.</span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  audio_setup_information->AppendInt(<span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(0x01));</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  </div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// Size is one byte.</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">if</span> (audio_specific_config_size > 0xFF) {</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  LOG(ERROR) << <span class="stringliteral">"Audio specific config should not be larger than one byte "</span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  << audio_specific_config_size;</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  }</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  audio_setup_information->AppendInt(</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(audio_specific_config_size));</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  </div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  audio_setup_information->AppendArray(audio_specific_config,</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  audio_specific_config_size);</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> }</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> } <span class="comment">// namespace shaka</span></div>
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<div class="ttc" id="anamespaceshaka_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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