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<li class="navelem"><a class="el" href="../../dir_39dc0668bd5a501998f94e8b4e546c71.html">media</a></li><li class="navelem"><a class="el" href="../../dir_c6ada2450b25ab5438a4dba6c9b890af.html">base</a></li> </ul>
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<div class="title">buffer_writer.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 Google Inc. All rights reserved.</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Use of this source code is governed by a BSD-style</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// license that can be found in the LICENSE file or at</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// https://developers.google.com/open-source/licenses/bsd</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "packager/media/base/buffer_writer.h"</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "packager/base/logging.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "packager/base/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/file/file.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">namespace </span>shaka {</div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">namespace </span>media {</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> BufferWriter::BufferWriter() {</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> kDefaultReservedCapacity = 0x40000; <span class="comment">// 256KB.</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  buf_.reserve(kDefaultReservedCapacity);</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"><a class="line" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#a01d91524fd5c5491bafcc1cff16db916"> 20</a></span> BufferWriter::BufferWriter(<span class="keywordtype">size_t</span> reserved_size_in_bytes) {</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  buf_.reserve(reserved_size_in_bytes);</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> }</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> BufferWriter::~BufferWriter() {}</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"><a class="line" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f"> 25</a></span> <span class="keywordtype">void</span> <a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f">BufferWriter::AppendInt</a>(uint8_t v) {</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  buf_.push_back(v);</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> }</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keywordtype">void</span> <a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f">BufferWriter::AppendInt</a>(uint16_t v) {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  AppendInternal(base::HostToNet16(v));</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> }</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keywordtype">void</span> <a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f">BufferWriter::AppendInt</a>(uint32_t v) {</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  AppendInternal(base::HostToNet32(v));</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> }</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keywordtype">void</span> <a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f">BufferWriter::AppendInt</a>(uint64_t v) {</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  AppendInternal(base::HostToNet64(v));</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> }</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keywordtype">void</span> <a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f">BufferWriter::AppendInt</a>(int16_t v) {</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  AppendInternal(base::HostToNet16(v));</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> <span class="keywordtype">void</span> <a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f">BufferWriter::AppendInt</a>(int32_t v) {</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  AppendInternal(base::HostToNet32(v));</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="keywordtype">void</span> <a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f">BufferWriter::AppendInt</a>(int64_t v) {</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  AppendInternal(base::HostToNet64(v));</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> }</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#ae44b09c03c9b8f0fbf58deb80355f299"> 47</a></span> <span class="keywordtype">void</span> <a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#ae44b09c03c9b8f0fbf58deb80355f299">BufferWriter::AppendNBytes</a>(uint64_t v, <span class="keywordtype">size_t</span> num_bytes) {</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  DCHECK_GE(<span class="keyword">sizeof</span>(v), num_bytes);</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  v = base::HostToNet64(v);</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">const</span> uint8_t* data = <span class="keyword">reinterpret_cast<</span>uint8_t*<span class="keyword">></span>(&v);</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  AppendArray(&data[<span class="keyword">sizeof</span>(v) - num_bytes], num_bytes);</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> }</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="keywordtype">void</span> BufferWriter::AppendVector(<span class="keyword">const</span> std::vector<uint8_t>& v) {</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  buf_.insert(buf_.end(), v.begin(), v.end());</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> </div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="keywordtype">void</span> BufferWriter::AppendArray(<span class="keyword">const</span> uint8_t* buf, <span class="keywordtype">size_t</span> size) {</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  buf_.insert(buf_.end(), buf, buf + size);</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> </div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keywordtype">void</span> BufferWriter::AppendBuffer(<span class="keyword">const</span> BufferWriter& buffer) {</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  buf_.insert(buf_.end(), buffer.buf_.begin(), buffer.buf_.end());</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> }</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
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<div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#a868dba843fcf923dd140fdda859a3a6d"> 66</a></span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a> <a class="code" href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#a868dba843fcf923dd140fdda859a3a6d">BufferWriter::WriteToFile</a>(<a class="code" href="../../d3/d61/classshaka_1_1media_1_1File.html">File</a>* file) {</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  DCHECK(file);</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  DCHECK(!buf_.empty());</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordtype">size_t</span> remaining_size = buf_.size();</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keyword">const</span> uint8_t* buf = &buf_[0];</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">while</span> (remaining_size > 0) {</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  int64_t size_written = file-><a class="code" href="../../d3/d61/classshaka_1_1media_1_1File.html#a3149670c0d085e71f0aa085ee87fdda5">Write</a>(buf, remaining_size);</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">if</span> (size_written <= 0) {</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> <a class="code" href="../../d0/d93/classshaka_1_1media_1_1Status.html">Status</a>(error::FILE_FAILURE,</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="stringliteral">"Fail to write to file in BufferWriter"</span>);</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  }</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  remaining_size -= size_written;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  buf += size_written;</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>  buf_.clear();</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">return</span> Status::OK;</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> }</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="keywordtype">void</span> BufferWriter::AppendInternal(T v) {</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  AppendArray(reinterpret_cast<uint8_t*>(&v), <span class="keyword">sizeof</span>(T));</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> }</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> } <span class="comment">// namespace media</span></div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> } <span class="comment">// namespace shaka</span></div>
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<div class="ttc" id="classshaka_1_1media_1_1File_html_a3149670c0d085e71f0aa085ee87fdda5"><div class="ttname"><a href="../../d3/d61/classshaka_1_1media_1_1File.html#a3149670c0d085e71f0aa085ee87fdda5">shaka::media::File::Write</a></div><div class="ttdeci">virtual int64_t Write(const void *buffer, uint64_t length)=0</div></div>
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<div class="ttc" id="classshaka_1_1media_1_1File_html"><div class="ttname"><a href="../../d3/d61/classshaka_1_1media_1_1File.html">shaka::media::File</a></div><div class="ttdoc">Define an abstract file interface. </div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d4d/file_8h_source.html#l00024">file.h:24</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BufferWriter_html_abd8854feedd8b45146eb04dacf7d5b2f"><div class="ttname"><a href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#abd8854feedd8b45146eb04dacf7d5b2f">shaka::media::BufferWriter::AppendInt</a></div><div class="ttdeci">void AppendInt(uint8_t v)</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dd3/buffer__writer_8cc_source.html#l00025">buffer_writer.cc:25</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BufferWriter_html_ae44b09c03c9b8f0fbf58deb80355f299"><div class="ttname"><a href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#ae44b09c03c9b8f0fbf58deb80355f299">shaka::media::BufferWriter::AppendNBytes</a></div><div class="ttdeci">void AppendNBytes(uint64_t v, size_t num_bytes)</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dd3/buffer__writer_8cc_source.html#l00047">buffer_writer.cc:47</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1Status_html"><div class="ttname"><a href="../../d0/d93/classshaka_1_1media_1_1Status.html">shaka::media::Status</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d13/status_8h_source.html#l00075">status.h:75</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1BufferWriter_html_a868dba843fcf923dd140fdda859a3a6d"><div class="ttname"><a href="../../dc/d41/classshaka_1_1media_1_1BufferWriter.html#a868dba843fcf923dd140fdda859a3a6d">shaka::media::BufferWriter::WriteToFile</a></div><div class="ttdeci">Status WriteToFile(File *file)</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dd3/buffer__writer_8cc_source.html#l00066">buffer_writer.cc:66</a></div></div>
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