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<div class="title">webm_cluster_parser.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 The Chromium Authors. All rights reserved.</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Use of this source code is governed by a BSD-style license that can be</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// found in the LICENSE file.</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> </div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include "packager/media/formats/webm/webm_cluster_parser.h"</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 <vector></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/sys_byteorder.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/decrypt_config.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/timestamp.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/filters/vp8_parser.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/filters/vp9_parser.h"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "packager/media/filters/webvtt_util.h"</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "packager/media/formats/webm/webm_constants.h"</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "packager/media/formats/webm/webm_crypto_helpers.h"</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "packager/media/formats/webm/webm_webvtt_parser.h"</span></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="comment">// Logs only while |count| < |max|, increments |count| for each log, and warns</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// in the log if |count| has just reached |max|.</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#define LIMITED_LOG(level, count, max) \</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"> LOG_IF(level, (count) < (max)) \</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor"> << (((count) + 1 == (max)) \</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor"> ? "(Log limit reached. Further similar entries " \</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor"> "may be suppressed): " \</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"> : "")</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor"></span><span class="preprocessor">#define LIMITED_DLOG(level, count, max) \</span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor"> DLOG_IF(level, (count) < (max)) \</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor"> << (((count) + 1 == (max)) \</span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"> ? "(Log limit reached. Further similar entries " \</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor"> "may be suppressed): " \</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor"> : "")</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">namespace </span>edash_packager {</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">namespace </span>{</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">const</span> int64_t kMicrosecondsPerMillisecond = 1000;</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">enum</span> {</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">// Limits the number of LOG() calls in the path of reading encoded</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">// duration to avoid spamming for corrupted data.</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  kMaxDurationErrorLogs = 10,</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// Limits the number of LOG() calls warning the user that buffer</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// durations have been estimated.</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  kMaxDurationEstimateLogs = 10,</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> </div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">// Helper function used to inspect block data to determine if the</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">// block is a keyframe.</span></div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">// |data| contains the bytes in the block.</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// |size| indicates the number of bytes in |data|.</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="keywordtype">bool</span> IsKeyframe(<span class="keywordtype">bool</span> is_video,</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  VideoCodec codec,</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">const</span> uint8_t* data,</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordtype">int</span> size) {</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// For now, assume that all blocks are keyframes for datatypes other than</span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="comment">// video. This is a valid assumption for Vorbis, WebVTT, & Opus.</span></div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">if</span> (!is_video)</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">switch</span> (codec) {</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">case</span> kCodecVP8:</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> <a class="code" href="../../d5/dce/classedash__packager_1_1media_1_1VP8Parser.html#a4ad8998cac0534124e785f21ccddbf0a">VP8Parser::IsKeyframe</a>(data, size);</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">case</span> kCodecVP9:</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">return</span> <a class="code" href="../../da/d5f/classedash__packager_1_1media_1_1VP9Parser.html#a5d09008aa9c80c28111979479307082c">VP9Parser::IsKeyframe</a>(data, size);</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">default</span>:</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  NOTIMPLEMENTED() << <span class="stringliteral">"Unsupported codec "</span> << codec;</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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> }</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> } <span class="comment">// namespace</span></div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">const</span> uint16_t <a class="code" href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#ab08c27583d9585af4a71d81bcb4f6772">WebMClusterParser::kOpusFrameDurationsMu</a>[] = {</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  10000, 20000, 40000, 60000, 10000, 20000, 40000, 60000, 10000, 20000, 40000,</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  60000, 10000, 20000, 10000, 20000, 2500, 5000, 10000, 20000, 2500, 5000,</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  10000, 20000, 2500, 5000, 10000, 20000, 2500, 5000, 10000, 20000};</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> WebMClusterParser::WebMClusterParser(</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  int64_t timecode_scale,</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  scoped_refptr<AudioStreamInfo> audio_stream_info,</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  scoped_refptr<VideoStreamInfo> video_stream_info,</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  int64_t audio_default_duration,</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  int64_t video_default_duration,</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">const</span> WebMTracksParser::TextTracks& text_tracks,</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">const</span> std::set<int64_t>& ignored_tracks,</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keyword">const</span> std::string& audio_encryption_key_id,</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">const</span> std::string& video_encryption_key_id,</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">const</span> <a class="code" href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#a1628c19a91f1b8ae123f7350936bfe32">MediaParser::NewSampleCB</a>& new_sample_cb,</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">const</span> <a class="code" href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#af5c74c8723a5306faddcdfdcadb4ab4a">MediaParser::InitCB</a>& init_cb)</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  : timecode_multiplier_(timecode_scale / 1000.0),</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  audio_stream_info_(audio_stream_info),</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  video_stream_info_(video_stream_info),</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  ignored_tracks_(ignored_tracks),</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  audio_encryption_key_id_(audio_encryption_key_id),</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  video_encryption_key_id_(video_encryption_key_id),</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  parser_(kWebMIdCluster, this),</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  initialized_(false),</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  init_cb_(init_cb),</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  cluster_start_time_(kNoTimestamp),</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  audio_(audio_stream_info ? audio_stream_info->track_id() : -1,</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  false,</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  audio_default_duration,</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  new_sample_cb),</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  video_(video_stream_info ? video_stream_info->track_id() : -1,</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  true,</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  video_default_duration,</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  new_sample_cb) {</div>
|
|
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">for</span> (WebMTracksParser::TextTracks::const_iterator it = text_tracks.begin();</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  it != text_tracks.end();</div>
|
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  ++it) {</div>
|
|
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  text_track_map_.insert(std::make_pair(</div>
|
|
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  it->first, Track(it->first, <span class="keyword">false</span>, kNoTimestamp, new_sample_cb)));</div>
|
|
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  }</div>
|
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> }</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> </div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> WebMClusterParser::~WebMClusterParser() {}</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div>
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<div class="line"><a name="l00121"></a><span class="lineno"><a class="line" href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#afd772eabfa31927d47dacfb219fca3ad"> 121</a></span> <span class="keywordtype">void</span> <a class="code" href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#afd772eabfa31927d47dacfb219fca3ad">WebMClusterParser::Reset</a>() {</div>
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|
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  last_block_timecode_ = -1;</div>
|
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  cluster_timecode_ = -1;</div>
|
|
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  cluster_start_time_ = kNoTimestamp;</div>
|
|
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  cluster_ended_ = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  parser_.<a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#a4e274d491d064174cb0e29d0e579eb71">Reset</a>();</div>
|
|
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  audio_.Reset();</div>
|
|
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  video_.Reset();</div>
|
|
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  ResetTextTracks();</div>
|
|
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> }</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div>
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<div class="line"><a name="l00132"></a><span class="lineno"><a class="line" href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#a005136b36fdc7cb760aedf9863633890"> 132</a></span> <span class="keywordtype">void</span> <a class="code" href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#a005136b36fdc7cb760aedf9863633890">WebMClusterParser::Flush</a>() {</div>
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|
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="comment">// Estimate the duration of the last frame if necessary.</span></div>
|
|
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  audio_.ApplyDurationEstimateIfNeeded();</div>
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|
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  video_.ApplyDurationEstimateIfNeeded();</div>
|
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#afd772eabfa31927d47dacfb219fca3ad">Reset</a>();</div>
|
|
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> }</div>
|
|
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div>
|
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<div class="line"><a name="l00139"></a><span class="lineno"><a class="line" href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#a060661d4a0bfc01543fa025fb4b09a7d"> 139</a></span> <span class="keywordtype">int</span> <a class="code" href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#a060661d4a0bfc01543fa025fb4b09a7d">WebMClusterParser::Parse</a>(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size) {</div>
|
|
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordtype">int</span> result = parser_.<a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#a5b3b0c8fd0423044d0090357428b8ee0">Parse</a>(buf, size);</div>
|
|
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div>
|
|
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">if</span> (result < 0) {</div>
|
|
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  cluster_ended_ = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">return</span> result;</div>
|
|
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  }</div>
|
|
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div>
|
|
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  cluster_ended_ = parser_.<a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#aabb9e87d04df9de57d7069a8943a1711">IsParsingComplete</a>();</div>
|
|
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">if</span> (cluster_ended_) {</div>
|
|
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="comment">// If there were no buffers in this cluster, set the cluster start time to</span></div>
|
|
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="comment">// be the |cluster_timecode_|.</span></div>
|
|
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span> (cluster_start_time_ == kNoTimestamp) {</div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">// If the cluster did not even have a |cluster_timecode_|, signal parse</span></div>
|
|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// error.</span></div>
|
|
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">if</span> (cluster_timecode_ < 0)</div>
|
|
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">return</span> -1;</div>
|
|
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div>
|
|
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  cluster_start_time_ = cluster_timecode_ * timecode_multiplier_;</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>  <span class="comment">// Reset the parser if we're done parsing so that</span></div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="comment">// it is ready to accept another cluster on the next</span></div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="comment">// call.</span></div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  parser_.<a class="code" href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#a4e274d491d064174cb0e29d0e579eb71">Reset</a>();</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>  last_block_timecode_ = -1;</div>
|
|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  cluster_timecode_ = -1;</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> </div>
|
|
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordflow">return</span> result;</div>
|
|
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> }</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> int64_t WebMClusterParser::TryGetEncodedAudioDuration(</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keyword">const</span> uint8_t* data,</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordtype">int</span> size) {</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="comment">// Duration is currently read assuming the *entire* stream is unencrypted.</span></div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="comment">// The special "Signal Byte" prepended to Blocks in encrypted streams is</span></div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="comment">// assumed to not be present.</span></div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment">// TODO: Consider parsing "Signal Byte" for encrypted streams to return</span></div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">// duration for any unencrypted blocks.</span></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>  DCHECK(audio_stream_info_);</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">if</span> (audio_stream_info_->codec() == kCodecOpus) {</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">return</span> ReadOpusDuration(data, size);</div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  }</div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="comment">// TODO: Implement duration reading for Vorbis. See motivations in</span></div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="comment">// http://crbug.com/396634.</span></div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">return</span> kNoTimestamp;</div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> }</div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> </div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> int64_t WebMClusterParser::ReadOpusDuration(<span class="keyword">const</span> uint8_t* data, <span class="keywordtype">int</span> size) {</div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="comment">// Masks and constants for Opus packets. See</span></div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="comment">// https://tools.ietf.org/html/rfc6716#page-14</span></div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keyword">static</span> <span class="keyword">const</span> uint8_t kTocConfigMask = 0xf8;</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keyword">static</span> <span class="keyword">const</span> uint8_t kTocFrameCountCodeMask = 0x03;</div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keyword">static</span> <span class="keyword">const</span> uint8_t kFrameCountMask = 0x3f;</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keyword">static</span> <span class="keyword">const</span> int64_t kPacketDurationMaxMs = 120000;</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordflow">if</span> (size < 1) {</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  LIMITED_DLOG(INFO, num_duration_errors_, kMaxDurationErrorLogs)</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  << <span class="stringliteral">"Invalid zero-byte Opus packet; demuxed block duration may be "</span></div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="stringliteral">"imprecise."</span>;</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">return</span> kNoTimestamp;</div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  }</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="comment">// Frame count type described by last 2 bits of Opus TOC byte.</span></div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordtype">int</span> frame_count_type = data[0] & kTocFrameCountCodeMask;</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordtype">int</span> frame_count = 0;</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">switch</span> (frame_count_type) {</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">case</span> 0:</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  frame_count = 1;</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">case</span> 1:</div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">case</span> 2:</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  frame_count = 2;</div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">case</span> 3:</div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="comment">// Type 3 indicates an arbitrary frame count described in the next byte.</span></div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">if</span> (size < 2) {</div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  LIMITED_DLOG(INFO, num_duration_errors_, kMaxDurationErrorLogs)</div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  << <span class="stringliteral">"Second byte missing from 'Code 3' Opus packet; demuxed block "</span></div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="stringliteral">"duration may be imprecise."</span>;</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">return</span> kNoTimestamp;</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  }</div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  frame_count = data[1] & kFrameCountMask;</div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> </div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">if</span> (frame_count == 0) {</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  LIMITED_DLOG(INFO, num_duration_errors_, kMaxDurationErrorLogs)</div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  << <span class="stringliteral">"Illegal 'Code 3' Opus packet with frame count zero; demuxed "</span></div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="stringliteral">"block duration may be imprecise."</span>;</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">return</span> kNoTimestamp;</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> </div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordflow">default</span>:</div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  LIMITED_DLOG(INFO, num_duration_errors_, kMaxDurationErrorLogs)</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  << <span class="stringliteral">"Unexpected Opus frame count type: "</span> << frame_count_type << <span class="stringliteral">"; "</span></div>
|
|
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  << <span class="stringliteral">"demuxed block duration may be imprecise."</span>;</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">return</span> kNoTimestamp;</div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  }</div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordtype">int</span> opusConfig = (data[0] & kTocConfigMask) >> 3;</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  CHECK_GE(opusConfig, 0);</div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  CHECK_LT(opusConfig, static_cast<int>(arraysize(<a class="code" href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#ab08c27583d9585af4a71d81bcb4f6772">kOpusFrameDurationsMu</a>)));</div>
|
|
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div>
|
|
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  DCHECK_GT(frame_count, 0);</div>
|
|
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  int64_t duration = <a class="code" href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#ab08c27583d9585af4a71d81bcb4f6772">kOpusFrameDurationsMu</a>[opusConfig] * frame_count;</div>
|
|
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> </div>
|
|
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">if</span> (duration > kPacketDurationMaxMs * 1000) {</div>
|
|
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="comment">// Intentionally allowing packet to pass through for now. Decoder should</span></div>
|
|
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="comment">// either handle or fail gracefully. LOG as breadcrumbs in case</span></div>
|
|
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="comment">// things go sideways.</span></div>
|
|
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  LIMITED_DLOG(INFO, num_duration_errors_, kMaxDurationErrorLogs)</div>
|
|
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  << <span class="stringliteral">"Warning, demuxed Opus packet with encoded duration: "</span></div>
|
|
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  << duration / 1000 << <span class="stringliteral">"ms. Should be no greater than "</span></div>
|
|
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  << kPacketDurationMaxMs << <span class="stringliteral">"ms."</span>;</div>
|
|
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div>
|
|
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div>
|
|
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">return</span> duration;</div>
|
|
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> }</div>
|
|
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div>
|
|
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> WebMParserClient* WebMClusterParser::OnListStart(<span class="keywordtype">int</span> <span class="keywordtype">id</span>) {</div>
|
|
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordflow">if</span> (<span class="keywordtype">id</span> == kWebMIdCluster) {</div>
|
|
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  cluster_timecode_ = -1;</div>
|
|
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  cluster_start_time_ = kNoTimestamp;</div>
|
|
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keywordtype">id</span> == kWebMIdBlockGroup) {</div>
|
|
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  block_data_.reset();</div>
|
|
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  block_data_size_ = -1;</div>
|
|
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  block_duration_ = -1;</div>
|
|
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  discard_padding_ = -1;</div>
|
|
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  discard_padding_set_ = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keywordtype">id</span> == kWebMIdBlockAdditions) {</div>
|
|
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  block_add_id_ = -1;</div>
|
|
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  block_additional_data_.reset();</div>
|
|
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  block_additional_data_size_ = 0;</div>
|
|
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  }</div>
|
|
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> </div>
|
|
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">return</span> <span class="keyword">this</span>;</div>
|
|
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> }</div>
|
|
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span> </div>
|
|
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="keywordtype">bool</span> WebMClusterParser::OnListEnd(<span class="keywordtype">int</span> <span class="keywordtype">id</span>) {</div>
|
|
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordflow">if</span> (<span class="keywordtype">id</span> != kWebMIdBlockGroup)</div>
|
|
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> </div>
|
|
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="comment">// Make sure the BlockGroup actually had a Block.</span></div>
|
|
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordflow">if</span> (block_data_size_ == -1) {</div>
|
|
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  LOG(ERROR) << <span class="stringliteral">"Block missing from BlockGroup."</span>;</div>
|
|
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  }</div>
|
|
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div>
|
|
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keywordtype">bool</span> result = ParseBlock(<span class="keyword">false</span>, block_data_.get(), block_data_size_,</div>
|
|
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  block_additional_data_.get(),</div>
|
|
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  block_additional_data_size_, block_duration_,</div>
|
|
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  discard_padding_set_ ? discard_padding_ : 0);</div>
|
|
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  block_data_.reset();</div>
|
|
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  block_data_size_ = -1;</div>
|
|
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  block_duration_ = -1;</div>
|
|
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  block_add_id_ = -1;</div>
|
|
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  block_additional_data_.reset();</div>
|
|
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  block_additional_data_size_ = 0;</div>
|
|
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  discard_padding_ = -1;</div>
|
|
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  discard_padding_set_ = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">return</span> result;</div>
|
|
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> }</div>
|
|
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> </div>
|
|
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="keywordtype">bool</span> WebMClusterParser::OnUInt(<span class="keywordtype">int</span> <span class="keywordtype">id</span>, int64_t val) {</div>
|
|
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  int64_t* dst;</div>
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<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keywordflow">switch</span> (<span class="keywordtype">id</span>) {</div>
|
|
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordflow">case</span> kWebMIdTimecode:</div>
|
|
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  dst = &cluster_timecode_;</div>
|
|
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">case</span> kWebMIdBlockDuration:</div>
|
|
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  dst = &block_duration_;</div>
|
|
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keywordflow">case</span> kWebMIdBlockAddID:</div>
|
|
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  dst = &block_add_id_;</div>
|
|
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keywordflow">default</span>:</div>
|
|
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  }</div>
|
|
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">if</span> (*dst != -1)</div>
|
|
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  *dst = val;</div>
|
|
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> }</div>
|
|
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span> </div>
|
|
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="keywordtype">bool</span> WebMClusterParser::ParseBlock(<span class="keywordtype">bool</span> is_simple_block,</div>
|
|
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keyword">const</span> uint8_t* buf,</div>
|
|
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordtype">int</span> size,</div>
|
|
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="keyword">const</span> uint8_t* additional,</div>
|
|
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keywordtype">int</span> additional_size,</div>
|
|
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordtype">int</span> duration,</div>
|
|
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  int64_t discard_padding) {</div>
|
|
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">if</span> (size < 4)</div>
|
|
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> </div>
|
|
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="comment">// Return an error if the trackNum > 127. We just aren't</span></div>
|
|
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="comment">// going to support large track numbers right now.</span></div>
|
|
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="keywordflow">if</span> (!(buf[0] & 0x80)) {</div>
|
|
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  LOG(ERROR) << <span class="stringliteral">"TrackNumber over 127 not supported"</span>;</div>
|
|
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  }</div>
|
|
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> </div>
|
|
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keywordtype">int</span> track_num = buf[0] & 0x7f;</div>
|
|
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordtype">int</span> timecode = buf[1] << 8 | buf[2];</div>
|
|
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keywordtype">int</span> flags = buf[3] & 0xff;</div>
|
|
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordtype">int</span> lacing = (flags >> 1) & 0x3;</div>
|
|
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> </div>
|
|
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordflow">if</span> (lacing) {</div>
|
|
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  LOG(ERROR) << <span class="stringliteral">"Lacing "</span> << lacing << <span class="stringliteral">" is not supported yet."</span>;</div>
|
|
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  }</div>
|
|
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> </div>
|
|
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="comment">// Sign extend negative timecode offsets.</span></div>
|
|
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keywordflow">if</span> (timecode & 0x8000)</div>
|
|
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  timecode |= ~0xffff;</div>
|
|
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> </div>
|
|
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keyword">const</span> uint8_t* frame_data = buf + 4;</div>
|
|
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keywordtype">int</span> frame_size = size - (frame_data - buf);</div>
|
|
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">return</span> OnBlock(is_simple_block, track_num, timecode, duration, flags,</div>
|
|
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  frame_data, frame_size, additional, additional_size,</div>
|
|
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  discard_padding);</div>
|
|
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span> }</div>
|
|
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> </div>
|
|
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="keywordtype">bool</span> WebMClusterParser::OnBinary(<span class="keywordtype">int</span> <span class="keywordtype">id</span>, <span class="keyword">const</span> uint8_t* data, <span class="keywordtype">int</span> size) {</div>
|
|
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keywordflow">switch</span> (<span class="keywordtype">id</span>) {</div>
|
|
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="keywordflow">case</span> kWebMIdSimpleBlock:</div>
|
|
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keywordflow">return</span> ParseBlock(<span class="keyword">true</span>, data, size, NULL, 0, -1, 0);</div>
|
|
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> </div>
|
|
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">case</span> kWebMIdBlock:</div>
|
|
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keywordflow">if</span> (block_data_) {</div>
|
|
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  LOG(ERROR) << <span class="stringliteral">"More than 1 Block in a BlockGroup is not "</span></div>
|
|
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="stringliteral">"supported."</span>;</div>
|
|
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  }</div>
|
|
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  block_data_.reset(<span class="keyword">new</span> uint8_t[size]);</div>
|
|
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  memcpy(block_data_.get(), data, size);</div>
|
|
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  block_data_size_ = size;</div>
|
|
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> </div>
|
|
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">case</span> kWebMIdBlockAdditional: {</div>
|
|
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  uint64_t block_add_id = base::HostToNet64(block_add_id_);</div>
|
|
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keywordflow">if</span> (block_additional_data_) {</div>
|
|
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="comment">// TODO: Technically, more than 1 BlockAdditional is allowed as per</span></div>
|
|
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="comment">// matroska spec. But for now we don't have a use case to support</span></div>
|
|
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="comment">// parsing of such files. Take a look at this again when such a case</span></div>
|
|
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="comment">// arises.</span></div>
|
|
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  LOG(ERROR) << <span class="stringliteral">"More than 1 BlockAdditional in a "</span></div>
|
|
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="stringliteral">"BlockGroup is not supported."</span>;</div>
|
|
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  }</div>
|
|
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="comment">// First 8 bytes of side_data in DecoderBuffer is the BlockAddID</span></div>
|
|
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <span class="comment">// element's value in Big Endian format. This is done to mimic ffmpeg</span></div>
|
|
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="comment">// demuxer's behavior.</span></div>
|
|
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  block_additional_data_size_ = size + <span class="keyword">sizeof</span>(block_add_id);</div>
|
|
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  block_additional_data_.reset(<span class="keyword">new</span> uint8_t[block_additional_data_size_]);</div>
|
|
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  memcpy(block_additional_data_.get(), &block_add_id,</div>
|
|
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="keyword">sizeof</span>(block_add_id));</div>
|
|
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  memcpy(block_additional_data_.get() + 8, data, size);</div>
|
|
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  }</div>
|
|
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="keywordflow">case</span> kWebMIdDiscardPadding: {</div>
|
|
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="keywordflow">if</span> (discard_padding_set_ || size <= 0 || size > 8)</div>
|
|
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  discard_padding_set_ = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span> </div>
|
|
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <span class="comment">// Read in the big-endian integer.</span></div>
|
|
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  discard_padding_ = <span class="keyword">static_cast<</span>int8_t<span class="keyword">></span>(data[0]);</div>
|
|
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i < size; ++i)</div>
|
|
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  discard_padding_ = (discard_padding_ << 8) | data[i];</div>
|
|
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span> </div>
|
|
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  }</div>
|
|
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordflow">default</span>:</div>
|
|
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  }</div>
|
|
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> }</div>
|
|
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> </div>
|
|
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span> <span class="keywordtype">bool</span> WebMClusterParser::OnBlock(<span class="keywordtype">bool</span> is_simple_block,</div>
|
|
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keywordtype">int</span> track_num,</div>
|
|
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="keywordtype">int</span> timecode,</div>
|
|
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="keywordtype">int</span> block_duration,</div>
|
|
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <span class="keywordtype">int</span> flags,</div>
|
|
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keyword">const</span> uint8_t* data,</div>
|
|
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="keywordtype">int</span> size,</div>
|
|
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keyword">const</span> uint8_t* additional,</div>
|
|
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="keywordtype">int</span> additional_size,</div>
|
|
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  int64_t discard_padding) {</div>
|
|
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  DCHECK_GE(size, 0);</div>
|
|
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keywordflow">if</span> (cluster_timecode_ == -1) {</div>
|
|
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  LOG(ERROR) << <span class="stringliteral">"Got a block before cluster timecode."</span>;</div>
|
|
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  }</div>
|
|
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span> </div>
|
|
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="comment">// TODO: Should relative negative timecode offsets be rejected? Or only when</span></div>
|
|
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <span class="comment">// the absolute timecode is negative? See http://crbug.com/271794</span></div>
|
|
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  <span class="keywordflow">if</span> (timecode < 0) {</div>
|
|
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  LOG(ERROR) << <span class="stringliteral">"Got a block with negative timecode offset "</span> << timecode;</div>
|
|
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  }</div>
|
|
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span> </div>
|
|
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="keywordflow">if</span> (last_block_timecode_ != -1 && timecode < last_block_timecode_) {</div>
|
|
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  LOG(ERROR) << <span class="stringliteral">"Got a block with a timecode before the previous block."</span>;</div>
|
|
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  }</div>
|
|
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span> </div>
|
|
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  Track* track = NULL;</div>
|
|
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  StreamType stream_type = kStreamAudio;</div>
|
|
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  std::string encryption_key_id;</div>
|
|
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  int64_t encoded_duration = kNoTimestamp;</div>
|
|
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keywordflow">if</span> (track_num == audio_.track_num()) {</div>
|
|
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  track = &audio_;</div>
|
|
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  encryption_key_id = audio_encryption_key_id_;</div>
|
|
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  <span class="keywordflow">if</span> (encryption_key_id.empty()) {</div>
|
|
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  encoded_duration = TryGetEncodedAudioDuration(data, size);</div>
|
|
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  }</div>
|
|
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (track_num == video_.track_num()) {</div>
|
|
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  track = &video_;</div>
|
|
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  encryption_key_id = video_encryption_key_id_;</div>
|
|
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  stream_type = kStreamVideo;</div>
|
|
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (ignored_tracks_.find(track_num) != ignored_tracks_.end()) {</div>
|
|
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (Track* <span class="keyword">const</span> text_track = FindTextTrack(track_num)) {</div>
|
|
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="keywordflow">if</span> (is_simple_block) <span class="comment">// BlockGroup is required for WebVTT cues</span></div>
|
|
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <span class="keywordflow">if</span> (block_duration < 0) <span class="comment">// not specified</span></div>
|
|
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  track = text_track;</div>
|
|
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  stream_type = kStreamText;</div>
|
|
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  LOG(ERROR) << <span class="stringliteral">"Unexpected track number "</span> << track_num;</div>
|
|
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  }</div>
|
|
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> </div>
|
|
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  last_block_timecode_ = timecode;</div>
|
|
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> </div>
|
|
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  int64_t timestamp = (cluster_timecode_ + timecode) * timecode_multiplier_;</div>
|
|
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span> </div>
|
|
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  scoped_refptr<MediaSample> buffer;</div>
|
|
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <span class="keywordflow">if</span> (stream_type != kStreamText) {</div>
|
|
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  <span class="comment">// The first bit of the flags is set when a SimpleBlock contains only</span></div>
|
|
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="comment">// keyframes. If this is a Block, then inspection of the payload is</span></div>
|
|
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="comment">// necessary to determine whether it contains a keyframe or not.</span></div>
|
|
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  <span class="comment">// http://www.matroska.org/technical/specs/index.html</span></div>
|
|
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="keywordtype">bool</span> is_keyframe =</div>
|
|
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  is_simple_block</div>
|
|
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  ? (flags & 0x80) != 0</div>
|
|
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  : IsKeyframe(stream_type == kStreamVideo,</div>
|
|
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  video_stream_info_ ? video_stream_info_->codec()</div>
|
|
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  : kUnknownVideoCodec,</div>
|
|
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  data, size);</div>
|
|
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span> </div>
|
|
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  <span class="comment">// Every encrypted Block has a signal byte and IV prepended to it. Current</span></div>
|
|
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="comment">// encrypted WebM request for comments specification is here</span></div>
|
|
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="comment">// http://wiki.webmproject.org/encryption/webm-encryption-rfc</span></div>
|
|
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  scoped_ptr<DecryptConfig> decrypt_config;</div>
|
|
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordtype">int</span> data_offset = 0;</div>
|
|
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keywordflow">if</span> (!encryption_key_id.empty() &&</div>
|
|
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  !WebMCreateDecryptConfig(</div>
|
|
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  data, size,</div>
|
|
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  reinterpret_cast<const uint8_t*>(encryption_key_id.data()),</div>
|
|
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  encryption_key_id.size(),</div>
|
|
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  &decrypt_config, &data_offset)) {</div>
|
|
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  }</div>
|
|
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span> </div>
|
|
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  buffer = <a class="code" href="../../d8/d6c/classedash__packager_1_1media_1_1MediaSample.html#ac65ec88fbe6d8b72c65b1ff3f68c5b02">MediaSample::CopyFrom</a>(data + data_offset, size - data_offset,</div>
|
|
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  additional, additional_size, is_keyframe);</div>
|
|
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span> </div>
|
|
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keywordflow">if</span> (decrypt_config) {</div>
|
|
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="comment">// TODO(kqyang): Decrypt it if it is encrypted.</span></div>
|
|
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  buffer->set_is_encrypted(<span class="keyword">true</span>);</div>
|
|
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  }</div>
|
|
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  std::string id, settings, content;</div>
|
|
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <a class="code" href="../../dc/dc8/classedash__packager_1_1media_1_1WebMWebVTTParser.html#a979168b11e59b863de2d3ba3fbb60815">WebMWebVTTParser::Parse</a>(data, size, &<span class="keywordtype">id</span>, &settings, &content);</div>
|
|
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span> </div>
|
|
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  std::vector<uint8_t> side_data;</div>
|
|
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  MakeSideData(<span class="keywordtype">id</span>.begin(), <span class="keywordtype">id</span>.end(),</div>
|
|
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  settings.begin(), settings.end(),</div>
|
|
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  &side_data);</div>
|
|
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span> </div>
|
|
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  buffer = <a class="code" href="../../d8/d6c/classedash__packager_1_1media_1_1MediaSample.html#ac65ec88fbe6d8b72c65b1ff3f68c5b02">MediaSample::CopyFrom</a>(</div>
|
|
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  reinterpret_cast<const uint8_t*>(content.data()), content.length(),</div>
|
|
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  &side_data[0], side_data.size(), <span class="keyword">true</span>);</div>
|
|
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  }</div>
|
|
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span> </div>
|
|
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  buffer->set_pts(timestamp);</div>
|
|
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  <span class="keywordflow">if</span> (cluster_start_time_ == kNoTimestamp)</div>
|
|
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  cluster_start_time_ = timestamp;</div>
|
|
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span> </div>
|
|
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  int64_t block_duration_time_delta = kNoTimestamp;</div>
|
|
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordflow">if</span> (block_duration >= 0) {</div>
|
|
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  block_duration_time_delta = block_duration * timecode_multiplier_;</div>
|
|
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  }</div>
|
|
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span> </div>
|
|
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  <span class="comment">// Prefer encoded duration over BlockGroup->BlockDuration or</span></div>
|
|
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  <span class="comment">// TrackEntry->DefaultDuration when available. This layering violation is a</span></div>
|
|
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <span class="comment">// workaround for http://crbug.com/396634, decreasing the likelihood of</span></div>
|
|
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="comment">// fall-back to rough estimation techniques for Blocks that lack a</span></div>
|
|
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="comment">// BlockDuration at the end of a cluster. Duration estimation may still apply</span></div>
|
|
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="comment">// in cases of encryption and codecs for which we do not extract encoded</span></div>
|
|
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <span class="comment">// duration. Estimates are applied as Block Timecode deltas, or once the whole</span></div>
|
|
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  <span class="comment">// stream is parsed in the case of the last Block in the stream. See</span></div>
|
|
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="comment">// Track::EmitBuffer and ApplyDurationEstimateIfNeeded().</span></div>
|
|
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span class="keywordflow">if</span> (encoded_duration != kNoTimestamp) {</div>
|
|
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  DCHECK(encoded_duration != kInfiniteDuration);</div>
|
|
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  DCHECK(encoded_duration > 0);</div>
|
|
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  buffer->set_duration(encoded_duration);</div>
|
|
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span> </div>
|
|
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  DVLOG(3) << __FUNCTION__ << <span class="stringliteral">" : "</span></div>
|
|
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  << <span class="stringliteral">"Using encoded duration "</span> << encoded_duration;</div>
|
|
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span> </div>
|
|
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  <span class="keywordflow">if</span> (block_duration_time_delta != kNoTimestamp) {</div>
|
|
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  int64_t duration_difference =</div>
|
|
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  block_duration_time_delta - encoded_duration;</div>
|
|
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span> </div>
|
|
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="keyword">const</span> <span class="keyword">auto</span> kWarnDurationDiff = timecode_multiplier_ * 2;</div>
|
|
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  <span class="keywordflow">if</span> (duration_difference > kWarnDurationDiff) {</div>
|
|
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  LIMITED_DLOG(INFO, num_duration_errors_, kMaxDurationErrorLogs)</div>
|
|
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  << <span class="stringliteral">"BlockDuration ("</span> << block_duration_time_delta / 1000</div>
|
|
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  << <span class="stringliteral">"ms) differs significantly from encoded duration ("</span></div>
|
|
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  << encoded_duration / 1000 << <span class="stringliteral">"ms)."</span>;</div>
|
|
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  }</div>
|
|
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  }</div>
|
|
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (block_duration_time_delta != kNoTimestamp) {</div>
|
|
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  buffer->set_duration(block_duration_time_delta);</div>
|
|
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  buffer->set_duration(track->default_duration());</div>
|
|
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  }</div>
|
|
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span> </div>
|
|
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  <span class="keywordflow">if</span> (!init_cb_.is_null() && !initialized_) {</div>
|
|
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  std::vector<scoped_refptr<StreamInfo>> streams;</div>
|
|
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="keywordflow">if</span> (audio_stream_info_)</div>
|
|
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  streams.push_back(audio_stream_info_);</div>
|
|
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  <span class="keywordflow">if</span> (video_stream_info_) {</div>
|
|
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  <span class="keywordflow">if</span> (stream_type == kStreamVideo) {</div>
|
|
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  scoped_ptr<VPxParser> vpx_parser;</div>
|
|
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  <span class="keywordflow">switch</span> (video_stream_info_->codec()) {</div>
|
|
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keywordflow">case</span> kCodecVP8:</div>
|
|
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  vpx_parser.reset(<span class="keyword">new</span> VP8Parser);</div>
|
|
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  <span class="keywordflow">case</span> kCodecVP9:</div>
|
|
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  vpx_parser.reset(<span class="keyword">new</span> VP9Parser);</div>
|
|
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <span class="keywordflow">default</span>:</div>
|
|
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  NOTIMPLEMENTED() << <span class="stringliteral">"Unsupported codec "</span></div>
|
|
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  << video_stream_info_->codec();</div>
|
|
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  }</div>
|
|
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  std::vector<VPxFrameInfo> vpx_frames;</div>
|
|
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  <span class="keywordflow">if</span> (!vpx_parser->Parse(buffer->data(), buffer->data_size(),</div>
|
|
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  &vpx_frames)) {</div>
|
|
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  LOG(ERROR) << <span class="stringliteral">"Failed to parse vpx frame."</span>;</div>
|
|
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  }</div>
|
|
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  <span class="keywordflow">if</span> (vpx_frames.size() != 1u || !vpx_frames[0].is_keyframe) {</div>
|
|
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  LOG(ERROR) << <span class="stringliteral">"The first frame should be a key frame."</span>;</div>
|
|
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  }</div>
|
|
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span> </div>
|
|
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  <span class="keyword">const</span> VPCodecConfiguration* codec_config = &vpx_parser->codec_config();</div>
|
|
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  video_stream_info_->set_codec_string(</div>
|
|
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  codec_config->GetCodecString(video_stream_info_->codec()));</div>
|
|
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  std::vector<uint8_t> extra_data;</div>
|
|
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  codec_config->Write(&extra_data);</div>
|
|
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  video_stream_info_->set_extra_data(extra_data);</div>
|
|
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  streams.push_back(video_stream_info_);</div>
|
|
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  init_cb_.Run(streams);</div>
|
|
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  initialized_ = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  }</div>
|
|
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  init_cb_.Run(streams);</div>
|
|
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  initialized_ = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  }</div>
|
|
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  }</div>
|
|
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span> </div>
|
|
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <span class="keywordflow">return</span> track->EmitBuffer(buffer);</div>
|
|
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span> }</div>
|
|
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span> </div>
|
|
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span> WebMClusterParser::Track::Track(<span class="keywordtype">int</span> track_num,</div>
|
|
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  <span class="keywordtype">bool</span> is_video,</div>
|
|
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  int64_t default_duration,</div>
|
|
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  <span class="keyword">const</span> <a class="code" href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#a1628c19a91f1b8ae123f7350936bfe32">MediaParser::NewSampleCB</a>& new_sample_cb)</div>
|
|
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  : track_num_(track_num),</div>
|
|
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  is_video_(is_video),</div>
|
|
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  default_duration_(default_duration),</div>
|
|
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  estimated_next_frame_duration_(kNoTimestamp),</div>
|
|
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  new_sample_cb_(new_sample_cb) {</div>
|
|
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  DCHECK(default_duration_ == kNoTimestamp || default_duration_ > 0);</div>
|
|
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span> }</div>
|
|
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span> </div>
|
|
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span> WebMClusterParser::Track::~Track() {}</div>
|
|
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span> </div>
|
|
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span> <span class="keywordtype">bool</span> WebMClusterParser::Track::EmitBuffer(</div>
|
|
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <span class="keyword">const</span> scoped_refptr<MediaSample>& buffer) {</div>
|
|
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  DVLOG(2) << <span class="stringliteral">"EmitBuffer() : "</span> << track_num_</div>
|
|
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  << <span class="stringliteral">" ts "</span> << buffer->pts()</div>
|
|
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  << <span class="stringliteral">" dur "</span> << buffer->duration()</div>
|
|
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  << <span class="stringliteral">" kf "</span> << buffer->is_key_frame()</div>
|
|
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  << <span class="stringliteral">" size "</span> << buffer->data_size();</div>
|
|
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span> </div>
|
|
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  <span class="keywordflow">if</span> (last_added_buffer_missing_duration_.get()) {</div>
|
|
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  int64_t derived_duration =</div>
|
|
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  buffer->pts() - last_added_buffer_missing_duration_->pts();</div>
|
|
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  last_added_buffer_missing_duration_->set_duration(derived_duration);</div>
|
|
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span> </div>
|
|
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  DVLOG(2) << <span class="stringliteral">"EmitBuffer() : applied derived duration to held-back buffer : "</span></div>
|
|
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  << <span class="stringliteral">" ts "</span></div>
|
|
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  << last_added_buffer_missing_duration_->pts()</div>
|
|
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  << <span class="stringliteral">" dur "</span></div>
|
|
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  << last_added_buffer_missing_duration_->duration()</div>
|
|
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  << <span class="stringliteral">" kf "</span> << last_added_buffer_missing_duration_->is_key_frame()</div>
|
|
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  << <span class="stringliteral">" size "</span> << last_added_buffer_missing_duration_->data_size();</div>
|
|
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  scoped_refptr<MediaSample> updated_buffer =</div>
|
|
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  last_added_buffer_missing_duration_;</div>
|
|
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  last_added_buffer_missing_duration_ = NULL;</div>
|
|
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  <span class="keywordflow">if</span> (!EmitBufferHelp(updated_buffer))</div>
|
|
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  }</div>
|
|
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span> </div>
|
|
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  <span class="keywordflow">if</span> (buffer->duration() == kNoTimestamp) {</div>
|
|
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  last_added_buffer_missing_duration_ = buffer;</div>
|
|
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  DVLOG(2) << <span class="stringliteral">"EmitBuffer() : holding back buffer that is missing duration"</span>;</div>
|
|
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  }</div>
|
|
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span> </div>
|
|
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  <span class="keywordflow">return</span> EmitBufferHelp(buffer);</div>
|
|
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span> }</div>
|
|
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span> </div>
|
|
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span> <span class="keywordtype">void</span> WebMClusterParser::Track::ApplyDurationEstimateIfNeeded() {</div>
|
|
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  <span class="keywordflow">if</span> (!last_added_buffer_missing_duration_.get())</div>
|
|
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  <span class="keywordflow">return</span>;</div>
|
|
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span> </div>
|
|
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  int64_t estimated_duration = GetDurationEstimate();</div>
|
|
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  last_added_buffer_missing_duration_->set_duration(estimated_duration);</div>
|
|
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span> </div>
|
|
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  LIMITED_LOG(INFO, num_duration_estimates_, kMaxDurationEstimateLogs)</div>
|
|
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  << <span class="stringliteral">"Estimating WebM block duration to be "</span> << estimated_duration / 1000</div>
|
|
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  << <span class="stringliteral">"ms for the last (Simple)Block in the Cluster for this Track. Use "</span></div>
|
|
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  <span class="stringliteral">"BlockGroups with BlockDurations at the end of each Track in a "</span></div>
|
|
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  <span class="stringliteral">"Cluster to avoid estimation."</span>;</div>
|
|
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span> </div>
|
|
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  DVLOG(2) << __FUNCTION__ << <span class="stringliteral">" new dur : ts "</span></div>
|
|
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  << last_added_buffer_missing_duration_->pts()</div>
|
|
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  << <span class="stringliteral">" dur "</span></div>
|
|
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  << last_added_buffer_missing_duration_->duration()</div>
|
|
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  << <span class="stringliteral">" kf "</span> << last_added_buffer_missing_duration_->is_key_frame()</div>
|
|
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  << <span class="stringliteral">" size "</span> << last_added_buffer_missing_duration_->data_size();</div>
|
|
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span> </div>
|
|
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  <span class="comment">// Don't use the applied duration as a future estimation (don't use</span></div>
|
|
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <span class="comment">// EmitBufferHelp() here.)</span></div>
|
|
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  new_sample_cb_.Run(track_num_, last_added_buffer_missing_duration_);</div>
|
|
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  last_added_buffer_missing_duration_ = NULL;</div>
|
|
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span> }</div>
|
|
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span> </div>
|
|
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span> <span class="keywordtype">void</span> WebMClusterParser::Track::Reset() {</div>
|
|
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  last_added_buffer_missing_duration_ = NULL;</div>
|
|
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span> }</div>
|
|
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span> </div>
|
|
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span> </div>
|
|
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span> <span class="keywordtype">bool</span> WebMClusterParser::Track::EmitBufferHelp(</div>
|
|
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  <span class="keyword">const</span> scoped_refptr<MediaSample>& buffer) {</div>
|
|
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  DCHECK(!last_added_buffer_missing_duration_.get());</div>
|
|
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span> </div>
|
|
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  int64_t duration = buffer->duration();</div>
|
|
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  <span class="keywordflow">if</span> (duration < 0 || duration == kNoTimestamp) {</div>
|
|
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  LOG(ERROR) << <span class="stringliteral">"Invalid buffer duration: "</span> << duration;</div>
|
|
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  }</div>
|
|
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span> </div>
|
|
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  <span class="comment">// The estimated frame duration is the maximum non-zero duration since the</span></div>
|
|
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  <span class="comment">// last initialization segment.</span></div>
|
|
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  <span class="keywordflow">if</span> (duration > 0) {</div>
|
|
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  int64_t orig_duration_estimate = estimated_next_frame_duration_;</div>
|
|
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  <span class="keywordflow">if</span> (estimated_next_frame_duration_ == kNoTimestamp) {</div>
|
|
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  estimated_next_frame_duration_ = duration;</div>
|
|
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  estimated_next_frame_duration_ =</div>
|
|
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  std::max(duration, estimated_next_frame_duration_);</div>
|
|
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  }</div>
|
|
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span> </div>
|
|
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  <span class="keywordflow">if</span> (orig_duration_estimate != estimated_next_frame_duration_) {</div>
|
|
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  DVLOG(3) << <span class="stringliteral">"Updated duration estimate:"</span></div>
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|
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  << orig_duration_estimate</div>
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<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  << <span class="stringliteral">" -> "</span></div>
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<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  << estimated_next_frame_duration_</div>
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<div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  << <span class="stringliteral">" at timestamp: "</span></div>
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<div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  << buffer->dts();</div>
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<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  }</div>
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<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  }</div>
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<div class="line"><a name="l00736"></a><span class="lineno"> 736</span> </div>
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<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  new_sample_cb_.Run(track_num_, buffer);</div>
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<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00739"></a><span class="lineno"> 739</span> }</div>
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<div class="line"><a name="l00740"></a><span class="lineno"> 740</span> </div>
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<div class="line"><a name="l00741"></a><span class="lineno"> 741</span> int64_t WebMClusterParser::Track::GetDurationEstimate() {</div>
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<div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  int64_t duration = estimated_next_frame_duration_;</div>
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<div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  <span class="keywordflow">if</span> (duration != kNoTimestamp) {</div>
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<div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  DVLOG(3) << __FUNCTION__ << <span class="stringliteral">" : using estimated duration"</span>;</div>
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<div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  DVLOG(3) << __FUNCTION__ << <span class="stringliteral">" : using hardcoded default duration"</span>;</div>
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<div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  <span class="keywordflow">if</span> (is_video_) {</div>
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<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  duration = kDefaultVideoBufferDurationInMs * kMicrosecondsPerMillisecond;</div>
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|
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  duration = kDefaultAudioBufferDurationInMs * kMicrosecondsPerMillisecond;</div>
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<div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  }</div>
|
|
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  }</div>
|
|
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span> </div>
|
|
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  DCHECK(duration > 0);</div>
|
|
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  DCHECK(duration != kNoTimestamp);</div>
|
|
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  <span class="keywordflow">return</span> duration;</div>
|
|
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span> }</div>
|
|
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span> </div>
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<div class="line"><a name="l00759"></a><span class="lineno"> 759</span> <span class="keywordtype">void</span> WebMClusterParser::ResetTextTracks() {</div>
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<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <span class="keywordflow">for</span> (TextTrackMap::iterator it = text_track_map_.begin();</div>
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<div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  it != text_track_map_.end();</div>
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|
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  ++it) {</div>
|
|
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  it->second.Reset();</div>
|
|
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  }</div>
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|
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span> }</div>
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|
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span> </div>
|
|
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span> WebMClusterParser::Track*</div>
|
|
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span> WebMClusterParser::FindTextTrack(<span class="keywordtype">int</span> track_num) {</div>
|
|
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  <span class="keyword">const</span> TextTrackMap::iterator it = text_track_map_.find(track_num);</div>
|
|
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span> </div>
|
|
<div class="line"><a name="l00771"></a><span class="lineno"> 771</span>  <span class="keywordflow">if</span> (it == text_track_map_.end())</div>
|
|
<div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  <span class="keywordflow">return</span> NULL;</div>
|
|
<div class="line"><a name="l00773"></a><span class="lineno"> 773</span> </div>
|
|
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  <span class="keywordflow">return</span> &it->second;</div>
|
|
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span> }</div>
|
|
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span> </div>
|
|
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span> } <span class="comment">// namespace media</span></div>
|
|
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span> } <span class="comment">// namespace edash_packager</span></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1WebMClusterParser_html_afd772eabfa31927d47dacfb219fca3ad"><div class="ttname"><a href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#afd772eabfa31927d47dacfb219fca3ad">edash_packager::media::WebMClusterParser::Reset</a></div><div class="ttdeci">void Reset()</div><div class="ttdoc">Resets the parser state so it can accept a new cluster. </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d8f/webm__cluster__parser_8cc_source.html#l00121">webm_cluster_parser.cc:121</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1VP8Parser_html_a4ad8998cac0534124e785f21ccddbf0a"><div class="ttname"><a href="../../d5/dce/classedash__packager_1_1media_1_1VP8Parser.html#a4ad8998cac0534124e785f21ccddbf0a">edash_packager::media::VP8Parser::IsKeyframe</a></div><div class="ttdeci">static bool IsKeyframe(const uint8_t *data, size_t data_size)</div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d70/vp8__parser_8cc_source.html#l00183">vp8_parser.cc:183</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1MediaSample_html_ac65ec88fbe6d8b72c65b1ff3f68c5b02"><div class="ttname"><a href="../../d8/d6c/classedash__packager_1_1media_1_1MediaSample.html#ac65ec88fbe6d8b72c65b1ff3f68c5b02">edash_packager::media::MediaSample::CopyFrom</a></div><div class="ttdeci">static scoped_refptr< MediaSample > CopyFrom(const uint8_t *data, size_t size, bool is_key_frame)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/d0d/media__sample_8cc_source.html#l00045">media_sample.cc:45</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1WebMWebVTTParser_html_a979168b11e59b863de2d3ba3fbb60815"><div class="ttname"><a href="../../dc/dc8/classedash__packager_1_1media_1_1WebMWebVTTParser.html#a979168b11e59b863de2d3ba3fbb60815">edash_packager::media::WebMWebVTTParser::Parse</a></div><div class="ttdeci">static void Parse(const uint8_t *payload, int payload_size, std::string *id, std::string *settings, std::string *content)</div><div class="ttdoc">Utility function to parse the WebVTT cue from a byte stream. </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/dc1/webm__webvtt__parser_8cc_source.html#l00010">webm_webvtt_parser.cc:10</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1WebMClusterParser_html_a060661d4a0bfc01543fa025fb4b09a7d"><div class="ttname"><a href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#a060661d4a0bfc01543fa025fb4b09a7d">edash_packager::media::WebMClusterParser::Parse</a></div><div class="ttdeci">int Parse(const uint8_t *buf, int size)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d8f/webm__cluster__parser_8cc_source.html#l00139">webm_cluster_parser.cc:139</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1MediaParser_html_a1628c19a91f1b8ae123f7350936bfe32"><div class="ttname"><a href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#a1628c19a91f1b8ae123f7350936bfe32">edash_packager::media::MediaParser::NewSampleCB</a></div><div class="ttdeci">base::Callback< bool(uint32_t track_id, const scoped_refptr< MediaSample > &media_sample)> NewSampleCB</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d12/media__parser_8h_source.html#l00043">media_parser.h:43</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1MediaParser_html_af5c74c8723a5306faddcdfdcadb4ab4a"><div class="ttname"><a href="../../dc/d48/classedash__packager_1_1media_1_1MediaParser.html#af5c74c8723a5306faddcdfdcadb4ab4a">edash_packager::media::MediaParser::InitCB</a></div><div class="ttdeci">base::Callback< void(const std::vector< scoped_refptr< StreamInfo > > &stream_info)> InitCB</div><div class="ttdef"><b>Definition:</b> <a href="../../d7/d12/media__parser_8h_source.html#l00034">media_parser.h:34</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1WebMListParser_html_aabb9e87d04df9de57d7069a8943a1711"><div class="ttname"><a href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#aabb9e87d04df9de57d7069a8943a1711">edash_packager::media::WebMListParser::IsParsingComplete</a></div><div class="ttdeci">bool IsParsingComplete() const </div><div class="ttdef"><b>Definition:</b> <a href="../../d3/db6/webm__parser_8cc_source.html#l00803">webm_parser.cc:803</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1VP9Parser_html_a5d09008aa9c80c28111979479307082c"><div class="ttname"><a href="../../da/d5f/classedash__packager_1_1media_1_1VP9Parser.html#a5d09008aa9c80c28111979479307082c">edash_packager::media::VP9Parser::IsKeyframe</a></div><div class="ttdeci">static bool IsKeyframe(const uint8_t *data, size_t data_size)</div><div class="ttdef"><b>Definition:</b> <a href="../../d6/d8a/vp9__parser_8cc_source.html#l00534">vp9_parser.cc:534</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1WebMListParser_html_a5b3b0c8fd0423044d0090357428b8ee0"><div class="ttname"><a href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#a5b3b0c8fd0423044d0090357428b8ee0">edash_packager::media::WebMListParser::Parse</a></div><div class="ttdeci">int Parse(const uint8_t *buf, int size)</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/db6/webm__parser_8cc_source.html#l00719">webm_parser.cc:719</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1WebMListParser_html_a4e274d491d064174cb0e29d0e579eb71"><div class="ttname"><a href="../../d6/dd6/classedash__packager_1_1media_1_1WebMListParser.html#a4e274d491d064174cb0e29d0e579eb71">edash_packager::media::WebMListParser::Reset</a></div><div class="ttdeci">void Reset()</div><div class="ttdoc">Resets the state of the parser so it can start parsing a new list. </div><div class="ttdef"><b>Definition:</b> <a href="../../d3/db6/webm__parser_8cc_source.html#l00714">webm_parser.cc:714</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1WebMClusterParser_html_a005136b36fdc7cb760aedf9863633890"><div class="ttname"><a href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#a005136b36fdc7cb760aedf9863633890">edash_packager::media::WebMClusterParser::Flush</a></div><div class="ttdeci">void Flush()</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d8f/webm__cluster__parser_8cc_source.html#l00132">webm_cluster_parser.cc:132</a></div></div>
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<div class="ttc" id="classedash__packager_1_1media_1_1WebMClusterParser_html_ab08c27583d9585af4a71d81bcb4f6772"><div class="ttname"><a href="../../db/da0/classedash__packager_1_1media_1_1WebMClusterParser.html#ab08c27583d9585af4a71d81bcb4f6772">edash_packager::media::WebMClusterParser::kOpusFrameDurationsMu</a></div><div class="ttdeci">static const uint16_t kOpusFrameDurationsMu[]</div><div class="ttdef"><b>Definition:</b> <a href="../../dc/d3c/webm__cluster__parser_8h_source.html#l00039">webm_cluster_parser.h:39</a></div></div>
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