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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">// Copyright 2014 Google Inc. All rights reserved.</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// Use of this source code is governed by a BSD-style</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">// license that can be found in the LICENSE file or at</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment">// https://developers.google.com/open-source/licenses/bsd</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160; </div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="preprocessor">#include &quot;packager/media/base/buffer_reader.h&quot;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160; </div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="preprocessor">#include &quot;packager/base/logging.h&quot;</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160; </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="keyword">namespace </span><a class="code" href="../../d8/daf/namespaceshaka.html">shaka</a> {</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="keyword">namespace </span>media {</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160; </div>
<div class="line"><a name="l00014"></a><span class="lineno"><a class="line" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a65b65ad5a5ebc9d66182c38ec9876c05"> 14</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a65b65ad5a5ebc9d66182c38ec9876c05">BufferReader::Read1</a>(uint8_t* v) {</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160; DCHECK(v != NULL);</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356">HasBytes</a>(1))</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160; *v = buf_[pos_++];</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;}</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; </div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="keywordtype">bool</span> BufferReader::Read2(uint16_t* v) {</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; <span class="keywordflow">return</span> Read(v);</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;}</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="keywordtype">bool</span> BufferReader::Read2s(int16_t* v) {</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <span class="keywordflow">return</span> Read(v);</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;}</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="keywordtype">bool</span> BufferReader::Read4(uint32_t* v) {</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <span class="keywordflow">return</span> Read(v);</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;}</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="keywordtype">bool</span> BufferReader::Read4s(int32_t* v) {</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <span class="keywordflow">return</span> Read(v);</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;}</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="keywordtype">bool</span> BufferReader::Read8(uint64_t* v) {</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keywordflow">return</span> Read(v);</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;}</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="keywordtype">bool</span> BufferReader::Read8s(int64_t* v) {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keywordflow">return</span> Read(v);</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;}</div>
<div class="line"><a name="l00040"></a><span class="lineno"><a class="line" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ac98c6631c07300a6b78ec58bfd4ced30"> 40</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ac98c6631c07300a6b78ec58bfd4ced30">BufferReader::ReadNBytesInto8</a>(uint64_t* v, <span class="keywordtype">size_t</span> num_bytes) {</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keywordflow">return</span> ReadNBytes(v, num_bytes);</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;}</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;<span class="keywordtype">bool</span> BufferReader::ReadNBytesInto8s(int64_t* v, <span class="keywordtype">size_t</span> num_bytes) {</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keywordflow">return</span> ReadNBytes(v, num_bytes);</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;}</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;<span class="keywordtype">bool</span> BufferReader::ReadToVector(std::vector&lt;uint8_t&gt;* vec, <span class="keywordtype">size_t</span> count) {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; DCHECK(vec != NULL);</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356">HasBytes</a>(count))</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; vec-&gt;assign(buf_ + pos_, buf_ + pos_ + count);</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; pos_ += count;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;}</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="keywordtype">bool</span> BufferReader::ReadToString(std::string* str, <span class="keywordtype">size_t</span> size) {</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; DCHECK(str);</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356">HasBytes</a>(size))</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; str-&gt;assign(buf_ + pos_, buf_ + pos_ + size);</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; pos_ += size;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;}</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; </div>
<div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ae2e74844020e15fb3c2d2a7b5bfb31f5"> 65</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ae2e74844020e15fb3c2d2a7b5bfb31f5">BufferReader::ReadCString</a>(std::string* str) {</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; DCHECK(str);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> count = 0; pos_ + count &lt; size_; count++) {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keywordflow">if</span> (buf_[pos_ + count] == 0) {</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; str-&gt;assign(buf_ + pos_, buf_ + pos_ + count);</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; pos_ += count + 1;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; }</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; }</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>; <span class="comment">// EOF</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;}</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; </div>
<div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a2b15dfcd6ff891a9cb7b76f48d91d15d"> 77</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a2b15dfcd6ff891a9cb7b76f48d91d15d">BufferReader::SkipBytes</a>(<span class="keywordtype">size_t</span> num_bytes) {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356">HasBytes</a>(num_bytes))</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; pos_ += num_bytes;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;}</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;<span class="keywordtype">bool</span> BufferReader::Read(T* v) {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="keywordflow">return</span> ReadNBytes(v, <span class="keyword">sizeof</span>(*v));</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160;}</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; </div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;<span class="keywordtype">bool</span> BufferReader::ReadNBytes(T* v, <span class="keywordtype">size_t</span> num_bytes) {</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; DCHECK(v != NULL);</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; DCHECK_LE(num_bytes, <span class="keyword">sizeof</span>(*v));</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356">HasBytes</a>(num_bytes))</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; </div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="comment">// Sign extension is required only if</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="comment">// |num_bytes| is less than size of T, and</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="comment">// T is a signed type.</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <span class="keyword">const</span> <span class="keywordtype">bool</span> sign_extension_required =</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; num_bytes &lt; sizeof(*v) &amp;&amp; static_cast&lt;T&gt;(-1) &lt; 0;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; <span class="comment">// Perform sign extension by casting the byte value to int8_t, which will be</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="comment">// sign extended automatically when it is implicitly converted to T.</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; T tmp = sign_extension_required ? <span class="keyword">static_cast&lt;</span>int8_t<span class="keyword">&gt;</span>(buf_[pos_++])</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; : buf_[pos_++];</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 1; i &lt; num_bytes; ++i) {</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; tmp &lt;&lt;= 8;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; tmp |= buf_[pos_++];</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; }</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; *v = tmp;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;}</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; </div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;} <span class="comment">// namespace media</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160;} <span class="comment">// namespace shaka</span></div>
2021-06-22 00:16:40 +00:00
</div><!-- fragment --></div><!-- contents -->
<div class="ttc" id="anamespaceshaka_html"><div class="ttname"><a href="../../d8/daf/namespaceshaka.html">shaka</a></div><div class="ttdoc">All the methods that are virtual are virtual for mocking.</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d15/gflags__hex__bytes_8cc_source.html#l00011">gflags_hex_bytes.cc:11</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1BufferReader_html_a2b15dfcd6ff891a9cb7b76f48d91d15d"><div class="ttname"><a href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a2b15dfcd6ff891a9cb7b76f48d91d15d">shaka::media::BufferReader::SkipBytes</a></div><div class="ttdeci">bool SkipBytes(size_t num_bytes) WARN_UNUSED_RESULT</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dbc/buffer__reader_8cc_source.html#l00077">buffer_reader.cc:77</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1BufferReader_html_ac98c6631c07300a6b78ec58bfd4ced30"><div class="ttname"><a href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ac98c6631c07300a6b78ec58bfd4ced30">shaka::media::BufferReader::ReadNBytesInto8</a></div><div class="ttdeci">bool ReadNBytesInto8(uint64_t *v, size_t num_bytes) WARN_UNUSED_RESULT</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dbc/buffer__reader_8cc_source.html#l00040">buffer_reader.cc:40</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1BufferReader_html_ae2e74844020e15fb3c2d2a7b5bfb31f5"><div class="ttname"><a href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ae2e74844020e15fb3c2d2a7b5bfb31f5">shaka::media::BufferReader::ReadCString</a></div><div class="ttdeci">bool ReadCString(std::string *str) WARN_UNUSED_RESULT</div><div class="ttdoc">Reads a null-terminated string.</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dbc/buffer__reader_8cc_source.html#l00065">buffer_reader.cc:65</a></div></div>
2021-06-22 00:16:40 +00:00
<div class="ttc" id="aclassshaka_1_1media_1_1BufferReader_html_a208f2fda9ea3e79583284c951642c356"><div class="ttname"><a href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a208f2fda9ea3e79583284c951642c356">shaka::media::BufferReader::HasBytes</a></div><div class="ttdeci">bool HasBytes(size_t count)</div><div class="ttdef"><b>Definition:</b> <a href="../../de/d3e/buffer__reader_8h_source.html#l00032">buffer_reader.h:32</a></div></div>
<div class="ttc" id="aclassshaka_1_1media_1_1BufferReader_html_a65b65ad5a5ebc9d66182c38ec9876c05"><div class="ttname"><a href="../../d9/d13/classshaka_1_1media_1_1BufferReader.html#a65b65ad5a5ebc9d66182c38ec9876c05">shaka::media::BufferReader::Read1</a></div><div class="ttdeci">bool Read1(uint8_t *v) WARN_UNUSED_RESULT</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/dbc/buffer__reader_8cc_source.html#l00014">buffer_reader.cc:14</a></div></div>
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