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<div class="title">fastMath.hpp</div> </div>
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<a href="fast_math_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="preprocessor">#ifndef OPENPOSE_UTILITIES_MATH_HPP</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define OPENPOSE_UTILITIES_MATH_HPP</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="keyword">namespace </span>op</div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;{</div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160; <span class="comment">// Use op::round/max/min for basic types (int, char, long, float, double, etc). Never with classes!</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160; <span class="comment">// `std::` alternatives uses &#39;const T&amp;&#39; instead of &#39;const T&#39; as argument.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160; <span class="comment">// E.g., std::round is really slow (~300 ms vs ~10 ms when I individually apply it to each element of a whole</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160; <span class="comment">// image array</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="comment">// Round functions</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160; <span class="comment">// Signed</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00014"></a><span class="lineno"><a class="line" href="namespaceop.html#abbf62284718858335848e43bbeafb192"> 14</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">char</span> <a class="code" href="namespaceop.html#abbf62284718858335848e43bbeafb192">charRound</a>(<span class="keyword">const</span> T a)</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160; {</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160; <span class="keywordflow">return</span> char(a+0.5f);</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160; }</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="namespaceop.html#a65c35aa5a4461e819a01371f152a7407"> 20</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">signed</span> <span class="keywordtype">char</span> <a class="code" href="namespaceop.html#a65c35aa5a4461e819a01371f152a7407">sCharRound</a>(<span class="keyword">const</span> T a)</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="keywordflow">return</span> (<span class="keywordtype">signed</span> <span class="keywordtype">char</span>)(a+0.5f);</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; }</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="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="namespaceop.html#adcfd0bf5ba782278488c157667a80c54"> 26</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="namespaceop.html#adcfd0bf5ba782278488c157667a80c54">intRound</a>(<span class="keyword">const</span> T a)</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="keywordflow">return</span> int(a+0.5f);</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; }</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="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="namespaceop.html#ae0d8debba08b802d115b71ee1232e535"> 32</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">long</span> <a class="code" href="namespaceop.html#ae0d8debba08b802d115b71ee1232e535">longRound</a>(<span class="keyword">const</span> T a)</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="keywordflow">return</span> long(a+0.5f);</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; }</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="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="namespaceop.html#a7817601c574b570fef5ab7703b9b8aea"> 38</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <a class="code" href="namespaceop.html#a7817601c574b570fef5ab7703b9b8aea">longLongRound</a>(<span class="keyword">const</span> T a)</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; <span class="keywordflow">return</span> (<span class="keywordtype">long</span> <span class="keywordtype">long</span>)(a+0.5f);</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; }</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="comment">// Unsigned</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="namespaceop.html#a61240e5fbd4ea84a2cfdc89407bcb1ae"> 45</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="namespaceop.html#a61240e5fbd4ea84a2cfdc89407bcb1ae">uCharRound</a>(<span class="keyword">const</span> T a)</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="keywordflow">return</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)(a+0.5f);</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;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="namespaceop.html#a8525e440d6ac1b558e72637dc4f4e3c4"> 51</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="namespaceop.html#a8525e440d6ac1b558e72637dc4f4e3c4">uIntRound</a>(<span class="keyword">const</span> T a)</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keywordflow">return</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>)(a+0.5f);</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="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="namespaceop.html#aaafe2e235a1a3a146bb026b71c521c7b"> 57</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code" href="namespaceop.html#aaafe2e235a1a3a146bb026b71c521c7b">ulongRound</a>(<span class="keyword">const</span> T a)</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; {</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keywordflow">return</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>)(a+0.5f);</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;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="namespaceop.html#a757a5cc88734e7be9e910e7d8213c282"> 63</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <a class="code" href="namespaceop.html#a757a5cc88734e7be9e910e7d8213c282">uLongLongRound</a>(<span class="keyword">const</span> T a)</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="keywordflow">return</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span>)(a+0.5f);</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; }</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="comment">// Max/min functions</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="namespaceop.html#a9f4b99449c0c73e2c89ee1a1eff007c7"> 70</a></span>&#160; <span class="keyword">inline</span> T <a class="code" href="namespaceop.html#a9f4b99449c0c73e2c89ee1a1eff007c7">fastMax</a>(<span class="keyword">const</span> T a, <span class="keyword">const</span> T b)</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; {</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <span class="keywordflow">return</span> (a &gt; b ? a : b);</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;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="namespaceop.html#a6e1d1f90ef06cc7af576fdaad4b4e320"> 76</a></span>&#160; <span class="keyword">inline</span> T <a class="code" href="namespaceop.html#a6e1d1f90ef06cc7af576fdaad4b4e320">fastMin</a>(<span class="keyword">const</span> T a, <span class="keyword">const</span> T b)</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordflow">return</span> (a &lt; b ? a : b);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; }</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="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;</div>
<div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="namespaceop.html#a2dafd3db8f922405b38240345dd1dce5"> 82</a></span>&#160; <span class="keyword">inline</span> T <a class="code" href="namespaceop.html#a2dafd3db8f922405b38240345dd1dce5">fastTruncate</a>(T value, T min = 0, T max = 1)</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="keywordflow">return</span> <a class="code" href="namespaceop.html#a6e1d1f90ef06cc7af576fdaad4b4e320">fastMin</a>(max, <a class="code" href="namespaceop.html#a9f4b99449c0c73e2c89ee1a1eff007c7">fastMax</a>(min, value));</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;}</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;<span class="preprocessor">#endif // OPENPOSE_UTILITIES_MATH_HPP</span></div>
<div class="ttc" id="namespaceop_html_a8525e440d6ac1b558e72637dc4f4e3c4"><div class="ttname"><a href="namespaceop.html#a8525e440d6ac1b558e72637dc4f4e3c4">op::uIntRound</a></div><div class="ttdeci">unsigned int uIntRound(const T a)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:51</div></div>
<div class="ttc" id="namespaceop_html_a9f4b99449c0c73e2c89ee1a1eff007c7"><div class="ttname"><a href="namespaceop.html#a9f4b99449c0c73e2c89ee1a1eff007c7">op::fastMax</a></div><div class="ttdeci">T fastMax(const T a, const T b)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:70</div></div>
<div class="ttc" id="namespaceop_html_a2dafd3db8f922405b38240345dd1dce5"><div class="ttname"><a href="namespaceop.html#a2dafd3db8f922405b38240345dd1dce5">op::fastTruncate</a></div><div class="ttdeci">T fastTruncate(T value, T min=0, T max=1)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:82</div></div>
<div class="ttc" id="namespaceop_html_abbf62284718858335848e43bbeafb192"><div class="ttname"><a href="namespaceop.html#abbf62284718858335848e43bbeafb192">op::charRound</a></div><div class="ttdeci">char charRound(const T a)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:14</div></div>
<div class="ttc" id="namespaceop_html_ae0d8debba08b802d115b71ee1232e535"><div class="ttname"><a href="namespaceop.html#ae0d8debba08b802d115b71ee1232e535">op::longRound</a></div><div class="ttdeci">long longRound(const T a)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:32</div></div>
<div class="ttc" id="namespaceop_html_aaafe2e235a1a3a146bb026b71c521c7b"><div class="ttname"><a href="namespaceop.html#aaafe2e235a1a3a146bb026b71c521c7b">op::ulongRound</a></div><div class="ttdeci">unsigned long ulongRound(const T a)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:57</div></div>
<div class="ttc" id="namespaceop_html_a65c35aa5a4461e819a01371f152a7407"><div class="ttname"><a href="namespaceop.html#a65c35aa5a4461e819a01371f152a7407">op::sCharRound</a></div><div class="ttdeci">signed char sCharRound(const T a)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:20</div></div>
<div class="ttc" id="namespaceop_html_a61240e5fbd4ea84a2cfdc89407bcb1ae"><div class="ttname"><a href="namespaceop.html#a61240e5fbd4ea84a2cfdc89407bcb1ae">op::uCharRound</a></div><div class="ttdeci">unsigned char uCharRound(const T a)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:45</div></div>
<div class="ttc" id="namespaceop_html_a6e1d1f90ef06cc7af576fdaad4b4e320"><div class="ttname"><a href="namespaceop.html#a6e1d1f90ef06cc7af576fdaad4b4e320">op::fastMin</a></div><div class="ttdeci">T fastMin(const T a, const T b)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:76</div></div>
<div class="ttc" id="namespaceop_html_adcfd0bf5ba782278488c157667a80c54"><div class="ttname"><a href="namespaceop.html#adcfd0bf5ba782278488c157667a80c54">op::intRound</a></div><div class="ttdeci">int intRound(const T a)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:26</div></div>
<div class="ttc" id="namespaceop_html_a757a5cc88734e7be9e910e7d8213c282"><div class="ttname"><a href="namespaceop.html#a757a5cc88734e7be9e910e7d8213c282">op::uLongLongRound</a></div><div class="ttdeci">unsigned long long uLongLongRound(const T a)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:63</div></div>
<div class="ttc" id="namespaceop_html_a7817601c574b570fef5ab7703b9b8aea"><div class="ttname"><a href="namespaceop.html#a7817601c574b570fef5ab7703b9b8aea">op::longLongRound</a></div><div class="ttdeci">long long longLongRound(const T a)</div><div class="ttdef"><b>Definition:</b> fastMath.hpp:38</div></div>
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