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<a href="#pub-types">Public Types</a> &#124;
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<p><code>#include &lt;<a class="el" href="_mnist_database_8hpp_source.html">MnistDatabase.hpp</a>&gt;</code></p>
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Public Types</h2></td></tr>
<tr class="memitem:a9d5c241a4bb952f78d140229d17f2465"><td class="memItemLeft" align="right" valign="top">using&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_mnist_database.html#a9d5c241a4bb952f78d140229d17f2465">DataType</a> = float</td></tr>
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<tr class="memitem:a0b6d5426d97a60215cdcd609dee35cc9"><td class="memItemLeft" align="right" valign="top">using&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_mnist_database.html#a0b6d5426d97a60215cdcd609dee35cc9">TTestCaseData</a> = <a class="el" href="class_classifier_test_case_data.html">ClassifierTestCaseData</a>&lt; <a class="el" href="class_mnist_database.html#a9d5c241a4bb952f78d140229d17f2465">DataType</a> &gt;</td></tr>
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Public Member Functions</h2></td></tr>
<tr class="memitem:a66e5904e741dbce2d648bc9a02e7eb0e"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_mnist_database.html#a66e5904e741dbce2d648bc9a02e7eb0e">MnistDatabase</a> (const std::string &amp;binaryFileDirectory, bool scaleValues=<a class="el" href="_ref_layer_tests_8cpp.html#a67e2647a90dec71bb79c8b38872ba570">false</a>)</td></tr>
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<tr class="memitem:a4808453ec85548b752bcc6d4c1bc90b2"><td class="memItemLeft" align="right" valign="top">std::unique_ptr&lt; <a class="el" href="class_mnist_database.html#a0b6d5426d97a60215cdcd609dee35cc9">TTestCaseData</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_mnist_database.html#a4808453ec85548b752bcc6d4c1bc90b2">GetTestCaseData</a> (unsigned int testCaseId)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<p class="definition">Definition at line <a class="el" href="_mnist_database_8hpp_source.html#l00012">12</a> of file <a class="el" href="_mnist_database_8hpp_source.html">MnistDatabase.hpp</a>.</p>
</div><h2 class="groupheader">Member Typedef Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a9d5c241a4bb952f78d140229d17f2465">&#9670;&nbsp;</a></span>DataType</h2>
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<td class="memname">using <a class="el" href="class_mnist_database.html#a9d5c241a4bb952f78d140229d17f2465">DataType</a> = float</td>
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<p class="definition">Definition at line <a class="el" href="_mnist_database_8hpp_source.html#l00015">15</a> of file <a class="el" href="_mnist_database_8hpp_source.html">MnistDatabase.hpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a0b6d5426d97a60215cdcd609dee35cc9">&#9670;&nbsp;</a></span>TTestCaseData</h2>
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<td class="memname">using <a class="el" href="class_mnist_database.html#a0b6d5426d97a60215cdcd609dee35cc9">TTestCaseData</a> = <a class="el" href="class_classifier_test_case_data.html">ClassifierTestCaseData</a>&lt;<a class="el" href="class_mnist_database.html#a9d5c241a4bb952f78d140229d17f2465">DataType</a>&gt;</td>
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<p class="definition">Definition at line <a class="el" href="_mnist_database_8hpp_source.html#l00016">16</a> of file <a class="el" href="_mnist_database_8hpp_source.html">MnistDatabase.hpp</a>.</p>
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<h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a66e5904e741dbce2d648bc9a02e7eb0e">&#9670;&nbsp;</a></span>MnistDatabase()</h2>
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<td class="memname"><a class="el" href="class_mnist_database.html">MnistDatabase</a> </td>
<td>(</td>
<td class="paramtype">const std::string &amp;&#160;</td>
<td class="paramname"><em>binaryFileDirectory</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool&#160;</td>
<td class="paramname"><em>scaleValues</em> = <code><a class="el" href="_ref_layer_tests_8cpp.html#a67e2647a90dec71bb79c8b38872ba570">false</a></code>&#160;</td>
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<td>)</td>
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<span class="mlabels"><span class="mlabel">explicit</span></span> </td>
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<p class="definition">Definition at line <a class="el" href="_mnist_database_8cpp_source.html#l00021">21</a> of file <a class="el" href="_mnist_database_8cpp_source.html">MnistDatabase.cpp</a>.</p>
<div class="fragment"><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; : m_BinaryDirectory(binaryFileDirectory)</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; , m_ScaleValues(scaleValues)</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;}</div></div><!-- fragment -->
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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a4808453ec85548b752bcc6d4c1bc90b2">&#9670;&nbsp;</a></span>GetTestCaseData()</h2>
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<td class="memname">std::unique_ptr&lt; <a class="el" href="class_mnist_database.html#a0b6d5426d97a60215cdcd609dee35cc9">MnistDatabase::TTestCaseData</a> &gt; GetTestCaseData </td>
<td>(</td>
<td class="paramtype">unsigned int&#160;</td>
<td class="paramname"><em>testCaseId</em></td><td>)</td>
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<p class="definition">Definition at line <a class="el" href="_mnist_database_8cpp_source.html#l00027">27</a> of file <a class="el" href="_mnist_database_8cpp_source.html">MnistDatabase.cpp</a>.</p>
<p class="reference">References <a class="el" href="_logging_8hpp_source.html#l00163">ARMNN_LOG</a>, <a class="el" href="_mnist_database_8cpp_source.html#l00016">EndianSwap()</a>, and <a class="el" href="_mnist_database_8cpp_source.html#l00014">g_kMnistImageByteSize</a>.</p>
<div class="fragment"><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;{</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; std::vector&lt;unsigned char&gt; I(<a class="code" href="_mnist_database_8cpp.html#a933b2eaa5ca0420cdc78044e959dcd6e">g_kMnistImageByteSize</a>);</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> label = 0;</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; std::string imagePath = m_BinaryDirectory + std::string(<span class="stringliteral">&quot;t10k-images.idx3-ubyte&quot;</span>);</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; std::string labelPath = m_BinaryDirectory + std::string(<span class="stringliteral">&quot;t10k-labels.idx1-ubyte&quot;</span>);</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; std::ifstream imageStream(imagePath, std::ios::binary);</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; std::ifstream labelStream(labelPath, std::ios::binary);</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keywordflow">if</span> (!imageStream.is_open())</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"> 40</span>&#160; <a class="code" href="_logging_8hpp.html#a7b6ad073975f437ec38ca7d20154727f">ARMNN_LOG</a>(fatal) &lt;&lt; <span class="stringliteral">&quot;Failed to load &quot;</span> &lt;&lt; imagePath;</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</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="keywordflow">if</span> (!labelStream.is_open())</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; {</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <a class="code" href="_logging_8hpp.html#a7b6ad073975f437ec38ca7d20154727f">ARMNN_LOG</a>(fatal) &lt;&lt; <span class="stringliteral">&quot;Failed to load &quot;</span> &lt;&lt; imagePath;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; }</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> magic, num, row, col;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="comment">// Checks the files have the correct header.</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; imageStream.read(reinterpret_cast&lt;char*&gt;(&amp;magic), <span class="keyword">sizeof</span>(magic));</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keywordflow">if</span> (magic != 0x03080000)</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; <a class="code" href="_logging_8hpp.html#a7b6ad073975f437ec38ca7d20154727f">ARMNN_LOG</a>(fatal) &lt;&lt; <span class="stringliteral">&quot;Failed to read &quot;</span> &lt;&lt; imagePath;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; }</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; labelStream.read(reinterpret_cast&lt;char*&gt;(&amp;magic), <span class="keyword">sizeof</span>(magic));</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keywordflow">if</span> (magic != 0x01080000)</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; {</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <a class="code" href="_logging_8hpp.html#a7b6ad073975f437ec38ca7d20154727f">ARMNN_LOG</a>(fatal) &lt;&lt; <span class="stringliteral">&quot;Failed to read &quot;</span> &lt;&lt; labelPath;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keywordflow">return</span> <span class="keyword">nullptr</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"> 65</span>&#160; <span class="comment">// Endian swaps the image and label file - all the integers in the files are stored in MSB first(high endian)</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="comment">// format, hence it needs to flip the bytes of the header if using it on Intel processors or low-endian machines</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; labelStream.read(reinterpret_cast&lt;char*&gt;(&amp;num), <span class="keyword">sizeof</span>(num));</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; imageStream.read(reinterpret_cast&lt;char*&gt;(&amp;num), <span class="keyword">sizeof</span>(num));</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; <a class="code" href="_mnist_database_8cpp.html#a4388a1d2afb5b20ea6c7ebefcafeaf05">EndianSwap</a>(num);</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; imageStream.read(reinterpret_cast&lt;char*&gt;(&amp;row), <span class="keyword">sizeof</span>(row));</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <a class="code" href="_mnist_database_8cpp.html#a4388a1d2afb5b20ea6c7ebefcafeaf05">EndianSwap</a>(row);</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; imageStream.read(reinterpret_cast&lt;char*&gt;(&amp;col), <span class="keyword">sizeof</span>(col));</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <a class="code" href="_mnist_database_8cpp.html#a4388a1d2afb5b20ea6c7ebefcafeaf05">EndianSwap</a>(col);</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="comment">// Reads image and label into memory.</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; imageStream.seekg(testCaseId * <a class="code" href="_mnist_database_8cpp.html#a933b2eaa5ca0420cdc78044e959dcd6e">g_kMnistImageByteSize</a>, std::ios_base::cur);</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; imageStream.read(reinterpret_cast&lt;char*&gt;(&amp;I[0]), g_kMnistImageByteSize);</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; labelStream.seekg(testCaseId, std::ios_base::cur);</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; labelStream.read(reinterpret_cast&lt;char*&gt;(&amp;label), 1);</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordflow">if</span> (!imageStream.good())</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; <a class="code" href="_logging_8hpp.html#a7b6ad073975f437ec38ca7d20154727f">ARMNN_LOG</a>(fatal) &lt;&lt; <span class="stringliteral">&quot;Failed to read &quot;</span> &lt;&lt; imagePath;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; }</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="keywordflow">if</span> (!labelStream.good())</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; <a class="code" href="_logging_8hpp.html#a7b6ad073975f437ec38ca7d20154727f">ARMNN_LOG</a>(fatal) &lt;&lt; <span class="stringliteral">&quot;Failed to read &quot;</span> &lt;&lt; labelPath;</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; }</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; std::vector&lt;float&gt; inputImageData;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; inputImageData.resize(g_kMnistImageByteSize);</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i &lt; col * row; ++i)</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; {</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; inputImageData[i] = boost::numeric_cast&lt;<span class="keywordtype">float</span>&gt;(I[i]);</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <span class="keywordflow">if</span>(m_ScaleValues)</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; {</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; inputImageData[i] /= 255.0f;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; }</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; }</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; <span class="keywordflow">return</span> std::make_unique&lt;TTestCaseData&gt;(label, std::move(inputImageData));</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;}</div><div class="ttc" id="_logging_8hpp_html_a7b6ad073975f437ec38ca7d20154727f"><div class="ttname"><a href="_logging_8hpp.html#a7b6ad073975f437ec38ca7d20154727f">ARMNN_LOG</a></div><div class="ttdeci">#define ARMNN_LOG(severity)</div><div class="ttdef"><b>Definition:</b> <a href="_logging_8hpp_source.html#l00163">Logging.hpp:163</a></div></div>
<div class="ttc" id="_mnist_database_8cpp_html_a933b2eaa5ca0420cdc78044e959dcd6e"><div class="ttname"><a href="_mnist_database_8cpp.html#a933b2eaa5ca0420cdc78044e959dcd6e">g_kMnistImageByteSize</a></div><div class="ttdeci">constexpr int g_kMnistImageByteSize</div><div class="ttdef"><b>Definition:</b> <a href="_mnist_database_8cpp_source.html#l00014">MnistDatabase.cpp:14</a></div></div>
<div class="ttc" id="_mnist_database_8cpp_html_a4388a1d2afb5b20ea6c7ebefcafeaf05"><div class="ttname"><a href="_mnist_database_8cpp.html#a4388a1d2afb5b20ea6c7ebefcafeaf05">EndianSwap</a></div><div class="ttdeci">void EndianSwap(unsigned int &amp;x)</div><div class="ttdef"><b>Definition:</b> <a href="_mnist_database_8cpp_source.html#l00016">MnistDatabase.cpp:16</a></div></div>
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