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<div class="title">chunking_handler.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 2017 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/chunking/chunking_handler.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/base/logging.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "packager/base/threading/platform_thread.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/base/media_sample.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>{</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> int64_t kThreadIdUnset = -1;</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> int64_t kTimeStampToDispatchAllSamples = -1;</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> } <span class="comment">// namespace</span></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>shaka {</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> ChunkingHandler::ChunkingHandler(<span class="keyword">const</span> ChunkingOptions& chunking_options)</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  : chunking_options_(chunking_options), thread_id_(kThreadIdUnset) {</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  CHECK_NE(chunking_options.segment_duration_in_seconds, 0u);</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> }</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> ChunkingHandler::~ChunkingHandler() {}</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"><a class="line" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a76a5f4b74da3876cc72f44301c389ebd"> 28</a></span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a76a5f4b74da3876cc72f44301c389ebd">ChunkingHandler::InitializeInternal</a>() {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  segment_info_.resize(num_input_streams());</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  subsegment_info_.resize(num_input_streams());</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  time_scales_.resize(num_input_streams());</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  last_sample_end_timestamps_.resize(num_input_streams());</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordflow">return</span> Status::OK;</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"><a class="line" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a44c30ffd7c283be2ba4347bda7848633"> 36</a></span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a44c30ffd7c283be2ba4347bda7848633">ChunkingHandler::Process</a>(std::unique_ptr<StreamData> stream_data) {</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">switch</span> (stream_data->stream_data_type) {</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">case</span> StreamDataType::kStreamInfo: {</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="comment">// Make sure the inputs come from the same thread.</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keyword">const</span> int64_t thread_id =</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(base::PlatformThread::CurrentId());</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  int64_t expected = kThreadIdUnset;</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">if</span> (!thread_id_.compare_exchange_strong(expected, thread_id) &&</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  expected != thread_id) {</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">return</span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a>(error::CHUNKING_ERROR,</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="stringliteral">"Inputs should come from the same thread."</span>);</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  }</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">const</span> <span class="keyword">auto</span> time_scale = stream_data->stream_info->time_scale();</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="comment">// The video stream is treated as the main stream. If there is only one</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="comment">// stream, it is the main stream.</span></div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_main_stream =</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  main_stream_index_ == kInvalidStreamIndex &&</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  (stream_data->stream_info->stream_type() == kStreamVideo ||</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  num_input_streams() == 1);</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">if</span> (is_main_stream) {</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  main_stream_index_ = stream_data->stream_index;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  segment_duration_ =</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  chunking_options_.<a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a1cdbde61303f629cc9b4cbcd98f2d711">segment_duration_in_seconds</a> * time_scale;</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  subsegment_duration_ =</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  chunking_options_.<a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#ac9368f6edb53d9dd90bc128b664a12e5">subsegment_duration_in_seconds</a> * time_scale;</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (stream_data->stream_info->stream_type() == kStreamVideo) {</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a>(error::CHUNKING_ERROR,</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="stringliteral">"Only one video stream is allowed per chunking handler."</span>);</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  }</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  time_scales_[stream_data->stream_index] = time_scale;</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">break</span>;</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="keywordflow">case</span> StreamDataType::kSegmentInfo:</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  VLOG(3) << <span class="stringliteral">"Drop existing segment info."</span>;</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">case</span> StreamDataType::kMediaSample: {</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> stream_index = stream_data->stream_index;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  DCHECK_NE(time_scales_[stream_index], 0u)</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  << <span class="stringliteral">"kStreamInfo should arrive before kMediaSample"</span>;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">if</span> (stream_index != main_stream_index_) {</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">if</span> (!stream_data->media_sample->is_key_frame()) {</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">return</span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a>(error::CHUNKING_ERROR,</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="stringliteral">"All non video samples should be key frames."</span>);</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="comment">// Cache non main stream samples, since we don't know yet whether these</span></div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">// samples belong to the current or next segment.</span></div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  non_main_samples_.push_back(std::move(stream_data));</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">// The streams are expected to be synchronized, so we don't expect to</span></div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="comment">// see a lot of samples before seeing video samples.</span></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> kMaxSamplesPerStreamBeforeVideoSample = 5u;</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">if</span> (non_main_samples_.size() ></div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  num_input_streams() * kMaxSamplesPerStreamBeforeVideoSample) {</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a>(error::CHUNKING_ERROR,</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="stringliteral">"Too many non video samples before video sample."</span>);</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  }</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">const</span> <a class="code" href="../../d7/d6d/classshaka_1_1media_1_1MediaSample.html">MediaSample</a>* sample = stream_data->media_sample.get();</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> status = ProcessMediaSample(sample);</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">if</span> (!status.ok())</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">return</span> status;</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">// Discard samples before segment start.</span></div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> (!segment_info_[stream_index])</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  last_sample_end_timestamps_[stream_index] =</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  sample->dts() + sample->duration();</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  }</div>
|
|
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">default</span>:</div>
|
|
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  VLOG(3) << <span class="stringliteral">"Stream data type "</span></div>
|
|
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  << <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(stream_data->stream_data_type) << <span class="stringliteral">" ignored."</span>;</div>
|
|
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  }</div>
|
|
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">return</span> <a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#accd62dd4def920571f95f4e1a98ab7ca">Dispatch</a>(std::move(stream_data));</div>
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|
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> }</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"><a class="line" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#ab526bd53e4d49d7209f01d9b10b9ab52"> 114</a></span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#ab526bd53e4d49d7209f01d9b10b9ab52">ChunkingHandler::OnFlushRequest</a>(<span class="keywordtype">size_t</span> input_stream_index) {</div>
|
|
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">if</span> (segment_info_[input_stream_index]) {</div>
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|
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> status;</div>
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|
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">if</span> (input_stream_index != main_stream_index_) {</div>
|
|
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  status = DispatchNonMainSamples(kTimeStampToDispatchAllSamples);</div>
|
|
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (!status.ok())</div>
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|
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">return</span> status;</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>  <span class="keyword">auto</span>& segment_info = segment_info_[input_stream_index];</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">if</span> (segment_info->start_timestamp != -1) {</div>
|
|
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  segment_info->duration = last_sample_end_timestamps_[input_stream_index] -</div>
|
|
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  segment_info->start_timestamp;</div>
|
|
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  status = <a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#a505c70d5e911e45ebcabcce09e2658f9">DispatchSegmentInfo</a>(input_stream_index, std::move(segment_info));</div>
|
|
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">if</span> (!status.ok())</div>
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|
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">return</span> status;</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"> 131</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> output_stream_index = input_stream_index;</div>
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|
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">return</span> <a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#ad5001bf12073101a949b062943769f5b">FlushDownstream</a>(output_stream_index);</div>
|
|
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> }</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> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> ChunkingHandler::ProcessMediaSample(<span class="keyword">const</span> <a class="code" href="../../d7/d6d/classshaka_1_1media_1_1MediaSample.html">MediaSample</a>* sample) {</div>
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|
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_key_frame = sample->is_key_frame();</div>
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|
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">const</span> int64_t timestamp = sample->dts();</div>
|
|
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="comment">// Check if we need to terminate the current (sub)segment.</span></div>
|
|
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordtype">bool</span> new_segment = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordtype">bool</span> new_subsegment = <span class="keyword">false</span>;</div>
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|
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">if</span> (is_key_frame || !chunking_options_.<a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a0ae39a9eef9c4adc63916fa594f0fe64">segment_sap_aligned</a>) {</div>
|
|
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keyword">const</span> int64_t segment_index = timestamp / segment_duration_;</div>
|
|
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">if</span> (segment_index != current_segment_index_) {</div>
|
|
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  current_segment_index_ = segment_index;</div>
|
|
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="comment">// Reset subsegment index.</span></div>
|
|
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  current_subsegment_index_ = 0;</div>
|
|
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  new_segment = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  }</div>
|
|
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div>
|
|
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">if</span> (!new_segment && subsegment_duration_ > 0 &&</div>
|
|
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  (is_key_frame || !chunking_options_.<a class="code" href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a6d9761fdfca7819c94baa23845ce9ad7">subsegment_sap_aligned</a>)) {</div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keyword">const</span> int64_t subsegment_index =</div>
|
|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  (timestamp - segment_info_[main_stream_index_]->start_timestamp) /</div>
|
|
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  subsegment_duration_;</div>
|
|
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">if</span> (subsegment_index != current_subsegment_index_) {</div>
|
|
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  current_subsegment_index_ = subsegment_index;</div>
|
|
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  new_subsegment = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  }</div>
|
|
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  }</div>
|
|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  Status status;</div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">if</span> (new_segment || new_subsegment) {</div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="comment">// Dispatch the samples before |timestamp| - See the implemention on how we</span></div>
|
|
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="comment">// determine if a sample is before |timestamp|..</span></div>
|
|
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  status.Update(DispatchNonMainSamples(timestamp));</div>
|
|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  }</div>
|
|
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> </div>
|
|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">if</span> (new_segment) {</div>
|
|
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  status.Update(DispatchSegmentInfoForAllStreams());</div>
|
|
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  segment_info_[main_stream_index_]->start_timestamp = timestamp;</div>
|
|
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</div>
|
|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">if</span> (subsegment_duration_ > 0 && (new_segment || new_subsegment)) {</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  status.Update(DispatchSubsegmentInfoForAllStreams());</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  subsegment_info_[main_stream_index_]->start_timestamp = timestamp;</div>
|
|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  }</div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordflow">if</span> (!status.ok())</div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">return</span> status;</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>  <span class="comment">// Dispatch non-main samples for the next segment.</span></div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">return</span> DispatchNonMainSamples(kTimeStampToDispatchAllSamples);</div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> }</div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> Status ChunkingHandler::DispatchNonMainSamples(int64_t timestamp_threshold) {</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  Status status;</div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">while</span> (status.ok() && !non_main_samples_.empty()) {</div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  DCHECK_EQ(non_main_samples_.front()->stream_data_type,</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  StreamDataType::kMediaSample);</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> stream_index = non_main_samples_.front()->stream_index;</div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keyword">const</span> MediaSample* sample = non_main_samples_.front()->media_sample.get();</div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="comment">// If the portion of the sample before |timestamp_threshold| is bigger than</span></div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="comment">// the other portion, we consider it part of the current segment.</span></div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keyword">const</span> int64_t timestamp = sample->dts() + sample->duration() / 2;</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> stop =</div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  (timestamp_threshold != kTimeStampToDispatchAllSamples &&</div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  (<span class="keyword">static_cast<</span><span class="keywordtype">double</span><span class="keyword">></span>(timestamp) / time_scales_[stream_index]) ></div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  (<span class="keyword">static_cast<</span><span class="keywordtype">double</span><span class="keyword">></span>(timestamp_threshold) /</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  time_scales_[main_stream_index_]));</div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  VLOG(3) << <span class="stringliteral">"Sample ts: "</span> << sample->dts() << <span class="stringliteral">" "</span></div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  << <span class="stringliteral">" duration: "</span> << sample->duration()</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  << <span class="stringliteral">" scale: "</span> << time_scales_[stream_index] << <span class="stringliteral">"\n"</span></div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  << <span class="stringliteral">" threshold: "</span> << timestamp_threshold</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  << <span class="stringliteral">" scale: "</span> << time_scales_[main_stream_index_]</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  << (stop ? <span class="stringliteral">" stop "</span></div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  : (segment_info_[stream_index] ? <span class="stringliteral">" dispatch "</span></div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  : <span class="stringliteral">" discard "</span>));</div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">if</span> (stop)</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="comment">// Only dispatch samples if the segment has started, otherwise discard</span></div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="comment">// them.</span></div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">if</span> (segment_info_[stream_index]) {</div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">if</span> (segment_info_[stream_index]->start_timestamp == -1)</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  segment_info_[stream_index]->start_timestamp = sample->dts();</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">if</span> (subsegment_info_[stream_index] &&</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  subsegment_info_[stream_index]->start_timestamp == -1) {</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  subsegment_info_[stream_index]->start_timestamp = sample->dts();</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>  last_sample_end_timestamps_[stream_index] =</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  sample->dts() + sample->duration();</div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  status.Update(<a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#accd62dd4def920571f95f4e1a98ab7ca">Dispatch</a>(std::move(non_main_samples_.front())));</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>  non_main_samples_.pop_front();</div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  }</div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">return</span> status;</div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> }</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> Status ChunkingHandler::DispatchSegmentInfoForAllStreams() {</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  Status status;</div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < segment_info_.size() && status.ok(); ++i) {</div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">if</span> (segment_info_[i] && segment_info_[i]->start_timestamp != -1) {</div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  segment_info_[i]->duration =</div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  last_sample_end_timestamps_[i] - segment_info_[i]->start_timestamp;</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  status.Update(<a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#a505c70d5e911e45ebcabcce09e2658f9">DispatchSegmentInfo</a>(i, std::move(segment_info_[i])));</div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  }</div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  segment_info_[i].reset(<span class="keyword">new</span> SegmentInfo);</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  subsegment_info_[i].reset();</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  }</div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">return</span> status;</div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> }</div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> </div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> Status ChunkingHandler::DispatchSubsegmentInfoForAllStreams() {</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  Status status;</div>
|
|
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < subsegment_info_.size() && status.ok(); ++i) {</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">if</span> (subsegment_info_[i] && subsegment_info_[i]->start_timestamp != -1) {</div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  subsegment_info_[i]->duration =</div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  last_sample_end_timestamps_[i] - subsegment_info_[i]->start_timestamp;</div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  status.Update(<a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#a505c70d5e911e45ebcabcce09e2658f9">DispatchSegmentInfo</a>(i, std::move(subsegment_info_[i])));</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  }</div>
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<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  subsegment_info_[i].reset(<span class="keyword">new</span> SegmentInfo);</div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  subsegment_info_[i]->is_subsegment = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  }</div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">return</span> status;</div>
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<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> }</div>
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> } <span class="comment">// namespace shaka</span></div>
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<div class="ttc" id="classshaka_1_1media_1_1ChunkingHandler_html_a44c30ffd7c283be2ba4347bda7848633"><div class="ttname"><a href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a44c30ffd7c283be2ba4347bda7848633">shaka::media::ChunkingHandler::Process</a></div><div class="ttdeci">Status Process(std::unique_ptr< StreamData > stream_data) override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d12/chunking__handler_8cc_source.html#l00036">chunking_handler.cc:36</a></div></div>
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<div class="ttc" id="structshaka_1_1media_1_1ChunkingOptions_html_a0ae39a9eef9c4adc63916fa594f0fe64"><div class="ttname"><a href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a0ae39a9eef9c4adc63916fa594f0fe64">shaka::media::ChunkingOptions::segment_sap_aligned</a></div><div class="ttdeci">bool segment_sap_aligned</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d79/chunking__handler_8h_source.html#l00027">chunking_handler.h:27</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaHandler_html_accd62dd4def920571f95f4e1a98ab7ca"><div class="ttname"><a href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#accd62dd4def920571f95f4e1a98ab7ca">shaka::media::MediaHandler::Dispatch</a></div><div class="ttdeci">Status Dispatch(std::unique_ptr< StreamData > stream_data)</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/de9/media__handler_8cc_source.html#l00052">media_handler.cc:52</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1ChunkingHandler_html_a76a5f4b74da3876cc72f44301c389ebd"><div class="ttname"><a href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#a76a5f4b74da3876cc72f44301c389ebd">shaka::media::ChunkingHandler::InitializeInternal</a></div><div class="ttdeci">Status InitializeInternal() override</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d12/chunking__handler_8cc_source.html#l00028">chunking_handler.cc:28</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1ChunkingHandler_html_ab526bd53e4d49d7209f01d9b10b9ab52"><div class="ttname"><a href="../../d4/d43/classshaka_1_1media_1_1ChunkingHandler.html#ab526bd53e4d49d7209f01d9b10b9ab52">shaka::media::ChunkingHandler::OnFlushRequest</a></div><div class="ttdeci">Status OnFlushRequest(size_t input_stream_index) override</div><div class="ttdoc">Event handler for flush request at the specific input stream index. </div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d12/chunking__handler_8cc_source.html#l00114">chunking_handler.cc:114</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaHandler_html_ad5001bf12073101a949b062943769f5b"><div class="ttname"><a href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#ad5001bf12073101a949b062943769f5b">shaka::media::MediaHandler::FlushDownstream</a></div><div class="ttdeci">Status FlushDownstream(size_t output_stream_index)</div><div class="ttdoc">Flush the downstream connected at the specified output stream index. </div><div class="ttdef"><b>Definition:</b> <a href="../../d2/de9/media__handler_8cc_source.html#l00063">media_handler.cc:63</a></div></div>
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<div class="ttc" id="structshaka_1_1media_1_1ChunkingOptions_html_ac9368f6edb53d9dd90bc128b664a12e5"><div class="ttname"><a href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#ac9368f6edb53d9dd90bc128b664a12e5">shaka::media::ChunkingOptions::subsegment_duration_in_seconds</a></div><div class="ttdeci">double subsegment_duration_in_seconds</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d79/chunking__handler_8h_source.html#l00023">chunking_handler.h:23</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaSample_html"><div class="ttname"><a href="../../d7/d6d/classshaka_1_1media_1_1MediaSample.html">shaka::media::MediaSample</a></div><div class="ttdoc">Class to hold a media sample. </div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d80/media__sample_8h_source.html#l00022">media_sample.h:22</a></div></div>
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<div class="ttc" id="structshaka_1_1media_1_1ChunkingOptions_html_a1cdbde61303f629cc9b4cbcd98f2d711"><div class="ttname"><a href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a1cdbde61303f629cc9b4cbcd98f2d711">shaka::media::ChunkingOptions::segment_duration_in_seconds</a></div><div class="ttdeci">double segment_duration_in_seconds</div><div class="ttdoc">Segment duration in seconds. </div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d79/chunking__handler_8h_source.html#l00019">chunking_handler.h:19</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Status_html"><div class="ttname"><a href="../../d0/d93/classshaka_1_1media_1_1Status.html">shaka::media::Status</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d13/status_8h_source.html#l00088">status.h:88</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1MediaHandler_html_a505c70d5e911e45ebcabcce09e2658f9"><div class="ttname"><a href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#a505c70d5e911e45ebcabcce09e2658f9">shaka::media::MediaHandler::DispatchSegmentInfo</a></div><div class="ttdeci">Status DispatchSegmentInfo(size_t stream_index, std::shared_ptr< SegmentInfo > segment_info)</div><div class="ttdoc">Dispatch the segment info to downstream handlers. </div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d93/media__handler_8h_source.html#l00168">media_handler.h:168</a></div></div>
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<div class="ttc" id="structshaka_1_1media_1_1ChunkingOptions_html_a6d9761fdfca7819c94baa23845ce9ad7"><div class="ttname"><a href="../../db/d02/structshaka_1_1media_1_1ChunkingOptions.html#a6d9761fdfca7819c94baa23845ce9ad7">shaka::media::ChunkingOptions::subsegment_sap_aligned</a></div><div class="ttdeci">bool subsegment_sap_aligned</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d79/chunking__handler_8h_source.html#l00032">chunking_handler.h:32</a></div></div>
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