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<li class="navelem"><a class="el" href="../../dir_39dc0668bd5a501998f94e8b4e546c71.html">media</a></li><li class="navelem"><a class="el" href="../../dir_65f7acfa8cf3a5f1edc11faa2428b914.html">formats</a></li><li class="navelem"><a class="el" href="../../dir_3e9291fd7a18fdecc763294cb2628910.html">mp4</a></li> </ul>
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<div class="title">fragmenter.cc</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2014 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/formats/mp4/fragmenter.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 <limits></span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "packager/media/base/buffer_writer.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "packager/media/base/audio_stream_info.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "packager/media/base/media_sample.h"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "packager/media/formats/mp4/box_definitions.h"</span></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="keyword">namespace </span>shaka {</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">namespace </span>mp4 {</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">namespace </span>{</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">const</span> int64_t kInvalidTime = std::numeric_limits<int64_t>::max();</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> uint64_t GetSeekPreroll(<span class="keyword">const</span> StreamInfo& stream_info) {</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keywordflow">if</span> (stream_info.stream_type() != kStreamAudio)</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keywordflow">return</span> 0;</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">const</span> AudioStreamInfo& audio_stream_info =</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keyword">static_cast<</span><span class="keyword">const </span>AudioStreamInfo&<span class="keyword">></span>(stream_info);</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keywordflow">return</span> audio_stream_info.seek_preroll_ns();</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> }</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> } <span class="comment">// namespace</span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div>
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<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a1be96f51fc8ea765aab7142df1bf6006"> 32</a></span> <a class="code" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a1be96f51fc8ea765aab7142df1bf6006">Fragmenter::Fragmenter</a>(std::shared_ptr<StreamInfo> info, <a class="code" href="../../df/d7b/structshaka_1_1media_1_1mp4_1_1TrackFragment.html">TrackFragment</a>* traf)</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  : use_decoding_timestamp_in_timeline_(false),</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  traf_(traf),</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  seek_preroll_(GetSeekPreroll(*info)),</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  fragment_initialized_(false),</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  fragment_finalized_(false),</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  fragment_duration_(0),</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  earliest_presentation_time_(kInvalidTime),</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  first_sap_time_(kInvalidTime) {</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  DCHECK(traf);</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> }</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> Fragmenter::~Fragmenter() {}</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a9453ee5952fc923eae502467e50317e2"> 46</a></span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a9453ee5952fc923eae502467e50317e2">Fragmenter::AddSample</a>(std::shared_ptr<MediaSample> sample) {</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  DCHECK(sample);</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">if</span> (sample->duration() == 0) {</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  LOG(WARNING) << <span class="stringliteral">"Unexpected sample with zero duration @ dts "</span></div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  << sample->dts();</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">if</span> (!fragment_initialized_) {</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> status = <a class="code" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#aa702c2af5ea5096d94f2943076a21e4a">InitializeFragment</a>(sample->dts());</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">if</span> (!status.ok())</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">return</span> status;</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  }</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">if</span> (sample->side_data_size() > 0)</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  LOG(WARNING) << <span class="stringliteral">"MP4 samples do not support side data. Side data ignored."</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>  <span class="comment">// Fill in sample parameters. It will be optimized later.</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  traf_->runs[0].sample_sizes.push_back(</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  static_cast<uint32_t>(sample->data_size()));</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  traf_->runs[0].sample_durations.push_back(sample->duration());</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  traf_->runs[0].sample_flags.push_back(</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  sample->is_key_frame() ? 0 : TrackFragmentHeader::kNonKeySampleMask);</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>  data_->AppendArray(sample->data(), sample->data_size());</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  fragment_duration_ += sample->duration();</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">const</span> int64_t pts = sample->pts();</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keyword">const</span> int64_t dts = sample->dts();</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>  <span class="keyword">const</span> int64_t timestamp = use_decoding_timestamp_in_timeline_ ? dts : pts;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="comment">// Set |earliest_presentation_time_| to |timestamp| if |timestamp| is smaller</span></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="comment">// or if it is not yet initialized (kInvalidTime > timestamp is always true).</span></div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">if</span> (earliest_presentation_time_ > timestamp)</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  earliest_presentation_time_ = timestamp;</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>  traf_->runs[0].sample_composition_time_offsets.push_back(pts - dts);</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">if</span> (pts != dts)</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  traf_->runs[0].flags |= TrackFragmentRun::kSampleCompTimeOffsetsPresentMask;</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">if</span> (sample->is_key_frame()) {</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">if</span> (first_sap_time_ == kInvalidTime)</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  first_sap_time_ = pts;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</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"><a class="line" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#aa702c2af5ea5096d94f2943076a21e4a"> 92</a></span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#aa702c2af5ea5096d94f2943076a21e4a">Fragmenter::InitializeFragment</a>(int64_t first_sample_dts) {</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  fragment_initialized_ = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  fragment_finalized_ = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  traf_->decode_time.decode_time = first_sample_dts;</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  traf_->runs.clear();</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  traf_->runs.resize(1);</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  traf_->runs[0].flags = TrackFragmentRun::kDataOffsetPresentMask;</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  traf_->sample_group_descriptions.clear();</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  traf_->sample_to_groups.clear();</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  traf_->header.sample_description_index = 1; <span class="comment">// 1-based.</span></div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  traf_->header.flags = TrackFragmentHeader::kDefaultBaseIsMoofMask |</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  TrackFragmentHeader::kSampleDescriptionIndexPresentMask;</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  fragment_duration_ = 0;</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  earliest_presentation_time_ = kInvalidTime;</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  first_sap_time_ = kInvalidTime;</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  data_.reset(<span class="keyword">new</span> <a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html">BufferWriter</a>());</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> }</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div>
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<div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a0295126af5e6b278a980021f43ae17ea"> 111</a></span> <span class="keywordtype">void</span> <a class="code" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a0295126af5e6b278a980021f43ae17ea">Fragmenter::FinalizeFragment</a>() {</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="comment">// Optimize trun box.</span></div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  traf_->runs[0].sample_count =</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keyword">static_cast<</span>uint32_t<span class="keyword">></span>(traf_->runs[0].sample_sizes.size());</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">if</span> (<a class="code" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a208b7b8dd83e73c4206469695a3216d4">OptimizeSampleEntries</a>(&traf_->runs[0].sample_durations,</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  &traf_->header.default_sample_duration)) {</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  traf_->header.flags |=</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  TrackFragmentHeader::kDefaultSampleDurationPresentMask;</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  traf_->runs[0].flags |= TrackFragmentRun::kSampleDurationPresentMask;</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">if</span> (<a class="code" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a208b7b8dd83e73c4206469695a3216d4">OptimizeSampleEntries</a>(&traf_->runs[0].sample_sizes,</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  &traf_->header.default_sample_size)) {</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  traf_->header.flags |= TrackFragmentHeader::kDefaultSampleSizePresentMask;</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  traf_->runs[0].flags |= TrackFragmentRun::kSampleSizePresentMask;</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  }</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">if</span> (<a class="code" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a208b7b8dd83e73c4206469695a3216d4">OptimizeSampleEntries</a>(&traf_->runs[0].sample_flags,</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  &traf_->header.default_sample_flags)) {</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  traf_->header.flags |= TrackFragmentHeader::kDefaultSampleFlagsPresentMask;</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  traf_->runs[0].flags |= TrackFragmentRun::kSampleFlagsPresentMask;</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  }</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> </div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="comment">// Add SampleToGroup boxes. A SampleToGroup box with grouping type of 'roll'</span></div>
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|
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="comment">// needs to be added if there is seek preroll, referencing sample group</span></div>
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|
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="comment">// description in track level; Also need to add SampleToGroup boxes</span></div>
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|
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="comment">// correponding to every SampleGroupDescription boxes, referencing sample</span></div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="comment">// group description in fragment level.</span></div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  DCHECK_EQ(traf_->sample_to_groups.size(), 0u);</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">if</span> (seek_preroll_ > 0) {</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  traf_->sample_to_groups.resize(traf_->sample_to_groups.size() + 1);</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <a class="code" href="../../d0/d7c/structshaka_1_1media_1_1mp4_1_1SampleToGroup.html">SampleToGroup</a>& sample_to_group = traf_->sample_to_groups.back();</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  sample_to_group.grouping_type = FOURCC_roll;</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  sample_to_group.entries.resize(1);</div>
|
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <a class="code" href="../../d7/de0/structshaka_1_1media_1_1mp4_1_1SampleToGroupEntry.html">SampleToGroupEntry</a>& sample_to_group_entry = sample_to_group.entries.back();</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  sample_to_group_entry.sample_count = traf_->runs[0].sample_count;</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  sample_to_group_entry.group_description_index =</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  SampleToGroupEntry::kTrackGroupDescriptionIndexBase + 1;</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  }</div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& sample_group_description :</div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  traf_->sample_group_descriptions) {</div>
|
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  traf_->sample_to_groups.resize(traf_->sample_to_groups.size() + 1);</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <a class="code" href="../../d0/d7c/structshaka_1_1media_1_1mp4_1_1SampleToGroup.html">SampleToGroup</a>& sample_to_group = traf_->sample_to_groups.back();</div>
|
|
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  sample_to_group.grouping_type = sample_group_description.grouping_type;</div>
|
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div>
|
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  sample_to_group.entries.resize(1);</div>
|
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <a class="code" href="../../d7/de0/structshaka_1_1media_1_1mp4_1_1SampleToGroupEntry.html">SampleToGroupEntry</a>& sample_to_group_entry = sample_to_group.entries.back();</div>
|
|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  sample_to_group_entry.sample_count = traf_->runs[0].sample_count;</div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  sample_to_group_entry.group_description_index =</div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  SampleToGroupEntry::kTrackFragmentGroupDescriptionIndexBase + 1;</div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  }</div>
|
|
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div>
|
|
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  fragment_finalized_ = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  fragment_initialized_ = <span class="keyword">false</span>;</div>
|
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> }</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
|
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<div class="line"><a name="l00169"></a><span class="lineno"><a class="line" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#af1f1d56215c1e9543bfb516136862fa6"> 169</a></span> <span class="keywordtype">void</span> <a class="code" href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#af1f1d56215c1e9543bfb516136862fa6">Fragmenter::GenerateSegmentReference</a>(<a class="code" href="../../dd/d9b/structshaka_1_1media_1_1mp4_1_1SegmentReference.html">SegmentReference</a>* reference) {</div>
|
|
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="comment">// NOTE: Daisy chain is not supported currently.</span></div>
|
|
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  reference->reference_type = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  reference->subsegment_duration = fragment_duration_;</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  reference->starts_with_sap = StartsWithSAP();</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">if</span> (kInvalidTime == first_sap_time_) {</div>
|
|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  reference->sap_type = SegmentReference::TypeUnknown;</div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  reference->sap_delta_time = 0;</div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  reference->sap_type = SegmentReference::Type1;</div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  reference->sap_delta_time = first_sap_time_ - earliest_presentation_time_;</div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  }</div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  reference->earliest_presentation_time = earliest_presentation_time_;</div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> }</div>
|
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> </div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="keywordtype">bool</span> Fragmenter::StartsWithSAP() {</div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  DCHECK(!traf_->runs.empty());</div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  uint32_t start_sample_flag;</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">if</span> (traf_->runs[0].flags & TrackFragmentRun::kSampleFlagsPresentMask) {</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  DCHECK(!traf_->runs[0].sample_flags.empty());</div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  start_sample_flag = traf_->runs[0].sample_flags[0];</div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  DCHECK(traf_->header.flags &</div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  TrackFragmentHeader::kDefaultSampleFlagsPresentMask);</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  start_sample_flag = traf_->header.default_sample_flags;</div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  }</div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordflow">return</span> (start_sample_flag & TrackFragmentHeader::kNonKeySampleMask) == 0;</div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> }</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div>
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> } <span class="comment">// namespace mp4</span></div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> } <span class="comment">// namespace media</span></div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> } <span class="comment">// namespace shaka</span></div>
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<div class="ttc" id="structshaka_1_1media_1_1mp4_1_1SampleToGroupEntry_html"><div class="ttname"><a href="../../d7/de0/structshaka_1_1media_1_1mp4_1_1SampleToGroupEntry.html">shaka::media::mp4::SampleToGroupEntry</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d7b/box__definitions_8h_source.html#l00522">box_definitions.h:522</a></div></div>
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|
<div class="ttc" id="structshaka_1_1media_1_1mp4_1_1SegmentReference_html"><div class="ttname"><a href="../../dd/d9b/structshaka_1_1media_1_1mp4_1_1SegmentReference.html">shaka::media::mp4::SegmentReference</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d7b/box__definitions_8h_source.html#l00750">box_definitions.h:750</a></div></div>
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<div class="ttc" id="structshaka_1_1media_1_1mp4_1_1TrackFragment_html"><div class="ttname"><a href="../../df/d7b/structshaka_1_1media_1_1mp4_1_1TrackFragment.html">shaka::media::mp4::TrackFragment</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d7b/box__definitions_8h_source.html#l00728">box_definitions.h:728</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp4_1_1Fragmenter_html_aa702c2af5ea5096d94f2943076a21e4a"><div class="ttname"><a href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#aa702c2af5ea5096d94f2943076a21e4a">shaka::media::mp4::Fragmenter::InitializeFragment</a></div><div class="ttdeci">virtual Status InitializeFragment(int64_t first_sample_dts)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d9a/fragmenter_8cc_source.html#l00092">fragmenter.cc:92</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BufferWriter_html"><div class="ttname"><a href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html">shaka::media::BufferWriter</a></div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dd2/buffer__writer_8h_source.html#l00022">buffer_writer.h:22</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp4_1_1Fragmenter_html_a0295126af5e6b278a980021f43ae17ea"><div class="ttname"><a href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a0295126af5e6b278a980021f43ae17ea">shaka::media::mp4::Fragmenter::FinalizeFragment</a></div><div class="ttdeci">virtual void FinalizeFragment()</div><div class="ttdoc">Finalize and optimize the fragment. </div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d9a/fragmenter_8cc_source.html#l00111">fragmenter.cc:111</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp4_1_1Fragmenter_html_a1be96f51fc8ea765aab7142df1bf6006"><div class="ttname"><a href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a1be96f51fc8ea765aab7142df1bf6006">shaka::media::mp4::Fragmenter::Fragmenter</a></div><div class="ttdeci">Fragmenter(std::shared_ptr< StreamInfo > info, TrackFragment *traf)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d9a/fragmenter_8cc_source.html#l00032">fragmenter.cc:32</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp4_1_1Fragmenter_html_a9453ee5952fc923eae502467e50317e2"><div class="ttname"><a href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a9453ee5952fc923eae502467e50317e2">shaka::media::mp4::Fragmenter::AddSample</a></div><div class="ttdeci">virtual Status AddSample(std::shared_ptr< MediaSample > sample)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d9a/fragmenter_8cc_source.html#l00046">fragmenter.cc:46</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp4_1_1Fragmenter_html_af1f1d56215c1e9543bfb516136862fa6"><div class="ttname"><a href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#af1f1d56215c1e9543bfb516136862fa6">shaka::media::mp4::Fragmenter::GenerateSegmentReference</a></div><div class="ttdeci">void GenerateSegmentReference(SegmentReference *reference)</div><div class="ttdoc">Fill reference with current fragment information. </div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d9a/fragmenter_8cc_source.html#l00169">fragmenter.cc:169</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#l00085">status.h:85</a></div></div>
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<div class="ttc" id="structshaka_1_1media_1_1mp4_1_1SampleToGroup_html"><div class="ttname"><a href="../../d0/d7c/structshaka_1_1media_1_1mp4_1_1SampleToGroup.html">shaka::media::mp4::SampleToGroup</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d7b/box__definitions_8h_source.html#l00532">box_definitions.h:532</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1mp4_1_1Fragmenter_html_a208b7b8dd83e73c4206469695a3216d4"><div class="ttname"><a href="../../db/d95/classshaka_1_1media_1_1mp4_1_1Fragmenter.html#a208b7b8dd83e73c4206469695a3216d4">shaka::media::mp4::Fragmenter::OptimizeSampleEntries</a></div><div class="ttdeci">bool OptimizeSampleEntries(std::vector< T > *entries, T *default_value)</div><div class="ttdef"><b>Definition:</b> <a href="../../da/dd1/fragmenter_8h_source.html#l00100">fragmenter.h:100</a></div></div>
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