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<div class="title">ts_packet.cc</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 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/mp2t/ts_packet.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 "packager/base/memory/scoped_ptr.h"</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include "packager/media/base/bit_reader.h"</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "packager/media/formats/mp2t/mp2t_common.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="keyword">namespace </span>edash_packager {</div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">namespace </span>mp2t {</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">static</span> <span class="keyword">const</span> uint8_t kTsHeaderSyncword = 0x47;</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// static</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keywordtype">int</span> TsPacket::Sync(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size) {</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="keywordtype">int</span> k = 0;</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keywordflow">for</span> (; k < size; k++) {</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="comment">// Verify that we have 4 syncwords in a row when possible,</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="comment">// this should improve synchronization robustness.</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keywordtype">bool</span> is_header = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 4; i++) {</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keywordtype">int</span> idx = k + i * kPacketSize;</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keywordflow">if</span> (idx >= size)</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keywordflow">if</span> (buf[idx] != kTsHeaderSyncword) {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  DVLOG(LOG_LEVEL_TS)</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  << <span class="stringliteral">"ByteSync"</span> << idx << <span class="stringliteral">": "</span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  << std::hex << static_cast<int>(buf[idx]) << std::dec;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  is_header = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  }</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  }</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordflow">if</span> (is_header)</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">break</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> </div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  DVLOG_IF(1, k != 0) << <span class="stringliteral">"SYNC: nbytes_skipped="</span> << k;</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">return</span> k;</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> }</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// static</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> TsPacket* TsPacket::Parse(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">int</span> size) {</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">if</span> (size < kPacketSize) {</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  DVLOG(1) << <span class="stringliteral">"Buffer does not hold one full TS packet:"</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  << <span class="stringliteral">" buffer_size="</span> << size;</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">return</span> NULL;</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  }</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  DCHECK_EQ(buf[0], kTsHeaderSyncword);</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">if</span> (buf[0] != kTsHeaderSyncword) {</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  DVLOG(1) << <span class="stringliteral">"Not on a TS syncword:"</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  << <span class="stringliteral">" buf[0]="</span></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  << std::hex << static_cast<int>(buf[0]) << std::dec;</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">return</span> NULL;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  }</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  scoped_ptr<TsPacket> ts_packet(<span class="keyword">new</span> TsPacket());</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordtype">bool</span> status = ts_packet->ParseHeader(buf);</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">if</span> (!status) {</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  DVLOG(1) << <span class="stringliteral">"Parsing header failed"</span>;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">return</span> NULL;</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  }</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">return</span> ts_packet.release();</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> }</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> TsPacket::TsPacket() {</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</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> TsPacket::~TsPacket() {</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> </div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keywordtype">bool</span> TsPacket::ParseHeader(<span class="keyword">const</span> uint8_t* buf) {</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  BitReader bit_reader(buf, kPacketSize);</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  payload_ = buf;</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  payload_size_ = kPacketSize;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">// Read the TS header: 4 bytes.</span></div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordtype">int</span> syncword;</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordtype">int</span> transport_error_indicator;</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordtype">int</span> payload_unit_start_indicator;</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordtype">int</span> transport_priority;</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordtype">int</span> transport_scrambling_control;</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordtype">int</span> adaptation_field_control;</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  RCHECK(bit_reader.ReadBits(8, &syncword));</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  RCHECK(bit_reader.ReadBits(1, &transport_error_indicator));</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  RCHECK(bit_reader.ReadBits(1, &payload_unit_start_indicator));</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  RCHECK(bit_reader.ReadBits(1, &transport_priority));</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  RCHECK(bit_reader.ReadBits(13, &pid_));</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  RCHECK(bit_reader.ReadBits(2, &transport_scrambling_control));</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  RCHECK(bit_reader.ReadBits(2, &adaptation_field_control));</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  RCHECK(bit_reader.ReadBits(4, &continuity_counter_));</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  payload_unit_start_indicator_ = (payload_unit_start_indicator != 0);</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  payload_ += 4;</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  payload_size_ -= 4;</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">// Default values when no adaptation field.</span></div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  discontinuity_indicator_ = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  random_access_indicator_ = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="comment">// Done since no adaptation field.</span></div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">if</span> ((adaptation_field_control & 0x2) == 0)</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">// Read the adaptation field if needed.</span></div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordtype">int</span> adaptation_field_length;</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  RCHECK(bit_reader.ReadBits(8, &adaptation_field_length));</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  DVLOG(LOG_LEVEL_TS) << <span class="stringliteral">"adaptation_field_length="</span> << adaptation_field_length;</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  payload_ += 1;</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  payload_size_ -= 1;</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">if</span> ((adaptation_field_control & 0x1) == 0 &&</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  adaptation_field_length != 183) {</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  DVLOG(1) << <span class="stringliteral">"adaptation_field_length="</span> << adaptation_field_length;</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">return</span> <span class="keyword">false</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>  <span class="keywordflow">if</span> ((adaptation_field_control & 0x1) == 1 &&</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  adaptation_field_length > 182) {</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  DVLOG(1) << <span class="stringliteral">"adaptation_field_length="</span> << adaptation_field_length;</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="comment">// This is not allowed by the spec.</span></div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="comment">// However, some badly encoded streams are using</span></div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="comment">// adaptation_field_length = 183</span></div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  }</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="comment">// adaptation_field_length = '0' is used to insert a single stuffing byte</span></div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="comment">// in the adaptation field of a transport stream packet.</span></div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">if</span> (adaptation_field_length == 0)</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">return</span> <span class="keyword">true</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"> 132</span>  <span class="keywordtype">bool</span> status = ParseAdaptationField(&bit_reader, adaptation_field_length);</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  payload_ += adaptation_field_length;</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  payload_size_ -= adaptation_field_length;</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">return</span> status;</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> }</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> </div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="keywordtype">bool</span> TsPacket::ParseAdaptationField(BitReader* bit_reader,</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordtype">int</span> adaptation_field_length) {</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  DCHECK_GT(adaptation_field_length, 0);</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordtype">int</span> adaptation_field_start_marker = bit_reader->bits_available() / 8;</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordtype">int</span> discontinuity_indicator;</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordtype">int</span> random_access_indicator;</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordtype">int</span> elementary_stream_priority_indicator;</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordtype">int</span> pcr_flag;</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordtype">int</span> opcr_flag;</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordtype">int</span> splicing_point_flag;</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordtype">int</span> transport_private_data_flag;</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordtype">int</span> adaptation_field_extension_flag;</div>
|
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  RCHECK(bit_reader->ReadBits(1, &discontinuity_indicator));</div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  RCHECK(bit_reader->ReadBits(1, &random_access_indicator));</div>
|
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  RCHECK(bit_reader->ReadBits(1, &elementary_stream_priority_indicator));</div>
|
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  RCHECK(bit_reader->ReadBits(1, &pcr_flag));</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  RCHECK(bit_reader->ReadBits(1, &opcr_flag));</div>
|
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  RCHECK(bit_reader->ReadBits(1, &splicing_point_flag));</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  RCHECK(bit_reader->ReadBits(1, &transport_private_data_flag));</div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  RCHECK(bit_reader->ReadBits(1, &adaptation_field_extension_flag));</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  discontinuity_indicator_ = (discontinuity_indicator != 0);</div>
|
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  random_access_indicator_ = (random_access_indicator != 0);</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div>
|
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">if</span> (pcr_flag) {</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  int64_t program_clock_reference_base;</div>
|
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordtype">int</span> reserved;</div>
|
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordtype">int</span> program_clock_reference_extension;</div>
|
|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  RCHECK(bit_reader->ReadBits(33, &program_clock_reference_base));</div>
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|
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  RCHECK(bit_reader->ReadBits(6, &reserved));</div>
|
|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  RCHECK(bit_reader->ReadBits(9, &program_clock_reference_extension));</div>
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|
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div>
|
|
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div>
|
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">if</span> (opcr_flag) {</div>
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|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  int64_t original_program_clock_reference_base;</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordtype">int</span> reserved;</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordtype">int</span> original_program_clock_reference_extension;</div>
|
|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  RCHECK(bit_reader->ReadBits(33, &original_program_clock_reference_base));</div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  RCHECK(bit_reader->ReadBits(6, &reserved));</div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  RCHECK(</div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  bit_reader->ReadBits(9, &original_program_clock_reference_extension));</div>
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|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  }</div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">if</span> (splicing_point_flag) {</div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordtype">int</span> splice_countdown;</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  RCHECK(bit_reader->ReadBits(8, &splice_countdown));</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</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>  <span class="keywordflow">if</span> (transport_private_data_flag) {</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordtype">int</span> transport_private_data_length;</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  RCHECK(bit_reader->ReadBits(8, &transport_private_data_length));</div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  RCHECK(bit_reader->SkipBits(8 * transport_private_data_length));</div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  }</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>  <span class="keywordflow">if</span> (adaptation_field_extension_flag) {</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keywordtype">int</span> adaptation_field_extension_length;</div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  RCHECK(bit_reader->ReadBits(8, &adaptation_field_extension_length));</div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  RCHECK(bit_reader->SkipBits(8 * adaptation_field_extension_length));</div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  }</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="comment">// The rest of the adaptation field should be stuffing bytes.</span></div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordtype">int</span> adaptation_field_remaining_size = adaptation_field_length -</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  (adaptation_field_start_marker - bit_reader->bits_available() / 8);</div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  RCHECK(adaptation_field_remaining_size >= 0);</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> k = 0; k < adaptation_field_remaining_size; k++) {</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordtype">int</span> stuffing_byte;</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  RCHECK(bit_reader->ReadBits(8, &stuffing_byte));</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  RCHECK(stuffing_byte == 0xff);</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>  DVLOG(LOG_LEVEL_TS) << <span class="stringliteral">"random_access_indicator="</span> << random_access_indicator_;</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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> </div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> } <span class="comment">// namespace mp2t</span></div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> } <span class="comment">// namespace media</span></div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> } <span class="comment">// namespace edash_packager</span></div>
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