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<div class="title">cluster_builder.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/webm/cluster_builder.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/logging.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/formats/webm/webm_constants.h"</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="keyword">namespace </span>edash_packager {</div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">static</span> <span class="keyword">const</span> uint8_t kClusterHeader[] = {</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  0x1F, 0x43, 0xB6, 0x75, <span class="comment">// CLUSTER ID</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, <span class="comment">// cluster(size = 0)</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  0xE7, <span class="comment">// Timecode ID</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  0x88, <span class="comment">// timecode(size=8)</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, <span class="comment">// timecode value</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> </div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">static</span> <span class="keyword">const</span> uint8_t kSimpleBlockHeader[] = {</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  0xA3, <span class="comment">// SimpleBlock ID</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, <span class="comment">// SimpleBlock(size = 0)</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> };</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">static</span> <span class="keyword">const</span> uint8_t kBlockGroupHeader[] = {</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  0xA0, <span class="comment">// BlockGroup ID</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, <span class="comment">// BlockGroup(size = 0)</span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  0x9B, <span class="comment">// BlockDuration ID</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  0x88, <span class="comment">// BlockDuration(size = 8)</span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, <span class="comment">// duration</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  0xA1, <span class="comment">// Block ID</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, <span class="comment">// Block(size = 0)</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="keyword">static</span> <span class="keyword">const</span> uint8_t kBlockGroupHeaderWithoutBlockDuration[] = {</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  0xA0, <span class="comment">// BlockGroup ID</span></div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, <span class="comment">// BlockGroup(size = 0)</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  0xA1, <span class="comment">// Block ID</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, <span class="comment">// Block(size = 0)</span></div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> };</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> <span class="keyword">enum</span> {</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  kClusterSizeOffset = 4,</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  kClusterTimecodeOffset = 14,</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  kSimpleBlockSizeOffset = 1,</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>  kBlockGroupSizeOffset = 1,</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  kBlockGroupWithoutBlockDurationBlockSizeOffset = 10,</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  kBlockGroupDurationOffset = 11,</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  kBlockGroupBlockSizeOffset = 20,</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  kInitialBufferSize = 32768,</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> };</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> Cluster::Cluster(scoped_ptr<uint8_t[]> data, <span class="keywordtype">int</span> size)</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  : data_(data.Pass()), size_(size) {}</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> Cluster::~Cluster() {}</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> ClusterBuilder::ClusterBuilder() { Reset(); }</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> ClusterBuilder::~ClusterBuilder() {}</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="keywordtype">void</span> ClusterBuilder::SetClusterTimecode(int64_t cluster_timecode) {</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  DCHECK_EQ(cluster_timecode_, -1);</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  cluster_timecode_ = cluster_timecode;</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// Write the timecode into the header.</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  uint8_t* buf = buffer_.get() + kClusterTimecodeOffset;</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 7; i >= 0; --i) {</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  buf[i] = cluster_timecode & 0xff;</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  cluster_timecode >>= 8;</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> }</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keywordtype">void</span> ClusterBuilder::AddSimpleBlock(<span class="keywordtype">int</span> track_num,</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  int64_t timecode,</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordtype">int</span> flags,</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">const</span> uint8_t* data,</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordtype">int</span> size) {</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordtype">int</span> block_size = size + 4;</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordtype">int</span> bytes_needed = <span class="keyword">sizeof</span>(kSimpleBlockHeader) + block_size;</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">if</span> (bytes_needed > (buffer_size_ - bytes_used_))</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  ExtendBuffer(bytes_needed);</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  uint8_t* buf = buffer_.get() + bytes_used_;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordtype">int</span> block_offset = bytes_used_;</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  memcpy(buf, kSimpleBlockHeader, <span class="keyword">sizeof</span>(kSimpleBlockHeader));</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  UpdateUInt64(block_offset + kSimpleBlockSizeOffset, block_size);</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  buf += <span class="keyword">sizeof</span>(kSimpleBlockHeader);</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  WriteBlock(buf, track_num, timecode, flags, data, size);</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  bytes_used_ += bytes_needed;</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> }</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="keywordtype">void</span> ClusterBuilder::AddBlockGroup(<span class="keywordtype">int</span> track_num,</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  int64_t timecode,</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordtype">int</span> duration,</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordtype">int</span> flags,</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">const</span> uint8_t* data,</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordtype">int</span> size) {</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  AddBlockGroupInternal(track_num, timecode, <span class="keyword">true</span>, duration, flags, data, size);</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</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="keywordtype">void</span> ClusterBuilder::AddBlockGroupWithoutBlockDuration(<span class="keywordtype">int</span> track_num,</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  int64_t timecode,</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordtype">int</span> flags,</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keyword">const</span> uint8_t* data,</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordtype">int</span> size) {</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  AddBlockGroupInternal(track_num, timecode, <span class="keyword">false</span>, 0, flags, data, size);</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> }</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="keywordtype">void</span> ClusterBuilder::AddBlockGroupInternal(<span class="keywordtype">int</span> track_num,</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  int64_t timecode,</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordtype">bool</span> include_block_duration,</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordtype">int</span> duration,</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordtype">int</span> flags,</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keyword">const</span> uint8_t* data,</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordtype">int</span> size) {</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordtype">int</span> block_size = size + 4;</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordtype">int</span> bytes_needed = block_size;</div>
|
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">if</span> (include_block_duration) {</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  bytes_needed += <span class="keyword">sizeof</span>(kBlockGroupHeader);</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  } <span class="keywordflow">else</span> {</div>
|
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  bytes_needed += <span class="keyword">sizeof</span>(kBlockGroupHeaderWithoutBlockDuration);</div>
|
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  }</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordtype">int</span> block_group_size = bytes_needed - 9;</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="keywordflow">if</span> (bytes_needed > (buffer_size_ - bytes_used_))</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  ExtendBuffer(bytes_needed);</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> </div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  uint8_t* buf = buffer_.get() + bytes_used_;</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordtype">int</span> block_group_offset = bytes_used_;</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">if</span> (include_block_duration) {</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  memcpy(buf, kBlockGroupHeader, <span class="keyword">sizeof</span>(kBlockGroupHeader));</div>
|
|
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  UpdateUInt64(block_group_offset + kBlockGroupDurationOffset, duration);</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  UpdateUInt64(block_group_offset + kBlockGroupBlockSizeOffset, block_size);</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  buf += <span class="keyword">sizeof</span>(kBlockGroupHeader);</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  } <span class="keywordflow">else</span> {</div>
|
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  memcpy(buf, kBlockGroupHeaderWithoutBlockDuration,</div>
|
|
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">sizeof</span>(kBlockGroupHeaderWithoutBlockDuration));</div>
|
|
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  UpdateUInt64(</div>
|
|
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  block_group_offset + kBlockGroupWithoutBlockDurationBlockSizeOffset,</div>
|
|
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  block_size);</div>
|
|
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  buf += <span class="keyword">sizeof</span>(kBlockGroupHeaderWithoutBlockDuration);</div>
|
|
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div>
|
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div>
|
|
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  UpdateUInt64(block_group_offset + kBlockGroupSizeOffset, block_group_size);</div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div>
|
|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// Make sure the 4 most-significant bits are 0.</span></div>
|
|
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">// http://www.matroska.org/technical/specs/index.html#block_structure</span></div>
|
|
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  flags &= 0x0f;</div>
|
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div>
|
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  WriteBlock(buf, track_num, timecode, flags, data, size);</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>  bytes_used_ += bytes_needed;</div>
|
|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> }</div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="keywordtype">void</span> ClusterBuilder::WriteBlock(uint8_t* buf,</div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordtype">int</span> track_num,</div>
|
|
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  int64_t timecode,</div>
|
|
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordtype">int</span> flags,</div>
|
|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keyword">const</span> uint8_t* data,</div>
|
|
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordtype">int</span> size) {</div>
|
|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  DCHECK_GE(track_num, 0);</div>
|
|
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  DCHECK_LE(track_num, 126);</div>
|
|
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  DCHECK_GE(flags, 0);</div>
|
|
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  DCHECK_LE(flags, 0xff);</div>
|
|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  DCHECK(data);</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  DCHECK_GT(size, 0);</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  DCHECK_NE(cluster_timecode_, -1);</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>  int64_t timecode_delta = timecode - cluster_timecode_;</div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  DCHECK_GE(timecode_delta, -32768);</div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  DCHECK_LE(timecode_delta, 32767);</div>
|
|
<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>  buf[0] = 0x80 | (track_num & 0x7F);</div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  buf[1] = (timecode_delta >> 8) & 0xff;</div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  buf[2] = timecode_delta & 0xff;</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  buf[3] = flags & 0xff;</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  memcpy(buf + 4, 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> scoped_ptr<Cluster> ClusterBuilder::Finish() {</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  DCHECK_NE(cluster_timecode_, -1);</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>  UpdateUInt64(kClusterSizeOffset, bytes_used_ - (kClusterSizeOffset + 8));</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>  scoped_ptr<Cluster> ret(<span class="keyword">new</span> Cluster(buffer_.Pass(), bytes_used_));</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  Reset();</div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">return</span> ret.Pass();</div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> }</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> scoped_ptr<Cluster> ClusterBuilder::FinishWithUnknownSize() {</div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  DCHECK_NE(cluster_timecode_, -1);</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> </div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  UpdateUInt64(kClusterSizeOffset, kWebMUnknownSize);</div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  scoped_ptr<Cluster> ret(<span class="keyword">new</span> Cluster(buffer_.Pass(), bytes_used_));</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  Reset();</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">return</span> ret.Pass();</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> }</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> <span class="keywordtype">void</span> ClusterBuilder::Reset() {</div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  buffer_size_ = kInitialBufferSize;</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  buffer_.reset(<span class="keyword">new</span> uint8_t[buffer_size_]);</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  memcpy(buffer_.get(), kClusterHeader, <span class="keyword">sizeof</span>(kClusterHeader));</div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  bytes_used_ = <span class="keyword">sizeof</span>(kClusterHeader);</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  cluster_timecode_ = -1;</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> }</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> </div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="keywordtype">void</span> ClusterBuilder::ExtendBuffer(<span class="keywordtype">int</span> bytes_needed) {</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordtype">int</span> new_buffer_size = 2 * buffer_size_;</div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">while</span> ((new_buffer_size - bytes_used_) < bytes_needed)</div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  new_buffer_size *= 2;</div>
|
|
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> </div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  scoped_ptr<uint8_t[]> new_buffer(<span class="keyword">new</span> uint8_t[new_buffer_size]);</div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> </div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  memcpy(new_buffer.get(), buffer_.get(), bytes_used_);</div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  buffer_.reset(new_buffer.release());</div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  buffer_size_ = new_buffer_size;</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> }</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> <span class="keywordtype">void</span> ClusterBuilder::UpdateUInt64(<span class="keywordtype">int</span> offset, int64_t value) {</div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  DCHECK_LE(offset + 7, buffer_size_);</div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  uint8_t* buf = buffer_.get() + offset;</div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> </div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="comment">// Fill the last 7 bytes of size field in big-endian order.</span></div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 7; i > 0; i--) {</div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  buf[i] = value & 0xff;</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  value >>= 8;</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> </div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> } <span class="comment">// namespace media</span></div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> } <span class="comment">// namespace edash_packager</span></div>
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|
</div><!-- fragment --></div><!-- contents -->
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