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<div class="title">/data/users/hoss/faiss/IndexBinaryFromFloat.cpp</div> </div>
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<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) Facebook, Inc. and its affiliates.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// -*- c++ -*-</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "IndexBinaryFromFloat.h"</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <memory></span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "utils.h"</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> IndexBinaryFromFloat::IndexBinaryFromFloat() {}</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> IndexBinaryFromFloat::IndexBinaryFromFloat(Index *index)</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  : IndexBinary(index->d),</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  index(index),</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  own_fields(false) {</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <a class="code" href="structfaiss_1_1IndexBinary.html#a132119ae93e240b54621c5c669853c7f">is_trained</a> = index->is_trained;</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <a class="code" href="structfaiss_1_1IndexBinary.html#a41b6759d127475d5fcd2b3982a8f355e">ntotal</a> = index->ntotal;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> }</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> IndexBinaryFromFloat::~IndexBinaryFromFloat() {</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexBinaryFromFloat.html#a7311fc4d11169f7bc668c16b027336ba">own_fields</a>) {</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">delete</span> index;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  }</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> }</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexBinaryFromFloat.html#ac4f01196a335a9b2433e5c16396c1fd7"> 34</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexBinaryFromFloat.html#ac4f01196a335a9b2433e5c16396c1fd7">IndexBinaryFromFloat::add</a>(<a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> n, <span class="keyword">const</span> uint8_t *x) {</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  constexpr <a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> bs = 32768;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  std::unique_ptr<float[]> xf(<span class="keyword">new</span> <span class="keywordtype">float</span>[bs * <a class="code" href="structfaiss_1_1IndexBinary.html#a0e485a7189eec2675032486d3b12cf88">d</a>]);</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> b = 0; b < n; b += bs) {</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> bn = std::min(bs, n - b);</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <a class="code" href="namespacefaiss.html#ac8260e10cfeed08a4344b85845773e16">binary_to_real</a>(bn * d, x + b * <a class="code" href="structfaiss_1_1IndexBinary.html#a277c2645b8def11c5d982384098c5380">code_size</a>, xf.get());</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  index-><a class="code" href="structfaiss_1_1Index.html#a1b5e9ac70adbce0897dd6c8276ad96f2">add</a>(bn, xf.get());</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  }</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <a class="code" href="structfaiss_1_1IndexBinary.html#a41b6759d127475d5fcd2b3982a8f355e">ntotal</a> = index-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> }</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexBinaryFromFloat.html#a487be675843e3146ee15bef3ee004a85"> 47</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexBinaryFromFloat.html#a487be675843e3146ee15bef3ee004a85">IndexBinaryFromFloat::reset</a>() {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  index-><a class="code" href="structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191">reset</a>();</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="structfaiss_1_1IndexBinary.html#a41b6759d127475d5fcd2b3982a8f355e">ntotal</a> = index-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> }</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexBinaryFromFloat.html#af92913a782c65843fbf7a65e017d6f5f"> 52</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexBinaryFromFloat.html#af92913a782c65843fbf7a65e017d6f5f">IndexBinaryFromFloat::search</a>(<a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> n, <span class="keyword">const</span> uint8_t *x, <a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> k,</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  int32_t *distances, <a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> *labels)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  constexpr <a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> bs = 32768;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  std::unique_ptr<float[]> xf(<span class="keyword">new</span> <span class="keywordtype">float</span>[bs * <a class="code" href="structfaiss_1_1IndexBinary.html#a0e485a7189eec2675032486d3b12cf88">d</a>]);</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  std::unique_ptr<float[]> df(<span class="keyword">new</span> <span class="keywordtype">float</span>[bs * k]);</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> b = 0; b < n; b += bs) {</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> bn = std::min(bs, n - b);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="code" href="namespacefaiss.html#ac8260e10cfeed08a4344b85845773e16">binary_to_real</a>(bn * d, x + b * <a class="code" href="structfaiss_1_1IndexBinary.html#a277c2645b8def11c5d982384098c5380">code_size</a>, xf.get());</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  index-><a class="code" href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">search</a>(bn, xf.get(), k, df.get(), labels + b * k);</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < bn * k; ++i) {</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  distances[b * k + i] = int32_t(std::round(df[i] / 4.0));</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  }</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> }</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div>
<div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexBinaryFromFloat.html#a7de4bb8e82f0dae621c87b44cfb64404"> 69</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexBinaryFromFloat.html#a7de4bb8e82f0dae621c87b44cfb64404">IndexBinaryFromFloat::train</a>(<a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> n, <span class="keyword">const</span> uint8_t *x) {</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  std::unique_ptr<float[]> xf(<span class="keyword">new</span> <span class="keywordtype">float</span>[n * <a class="code" href="structfaiss_1_1IndexBinary.html#a0e485a7189eec2675032486d3b12cf88">d</a>]);</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <a class="code" href="namespacefaiss.html#ac8260e10cfeed08a4344b85845773e16">binary_to_real</a>(n * d, x, xf.get());</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  index-><a class="code" href="structfaiss_1_1Index.html#abf601502bdbfa02b9d7bcd7b3671b71d">train</a>(n, xf.get());</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="structfaiss_1_1IndexBinary.html#a132119ae93e240b54621c5c669853c7f">is_trained</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <a class="code" href="structfaiss_1_1IndexBinary.html#a41b6759d127475d5fcd2b3982a8f355e">ntotal</a> = index-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> }</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> } <span class="comment">// namespace faiss</span></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFromFloat_html_ac4f01196a335a9b2433e5c16396c1fd7"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFromFloat.html#ac4f01196a335a9b2433e5c16396c1fd7">faiss::IndexBinaryFromFloat::add</a></div><div class="ttdeci">void add(idx_t n, const uint8_t *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFromFloat_8cpp_source.html#l00034">IndexBinaryFromFloat.cpp:34</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a849361f5f0ab0aba8d419c86f2594191"><div class="ttname"><a href="structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191">faiss::Index::reset</a></div><div class="ttdeci">virtual void reset()=0</div><div class="ttdoc">removes all elements from the database. </div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFromFloat_html_a7311fc4d11169f7bc668c16b027336ba"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFromFloat.html#a7311fc4d11169f7bc668c16b027336ba">faiss::IndexBinaryFromFloat::own_fields</a></div><div class="ttdeci">bool own_fields</div><div class="ttdoc">Whether object owns the index pointer. </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFromFloat_8h_source.html#l00031">IndexBinaryFromFloat.h:31</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_abf601502bdbfa02b9d7bcd7b3671b71d"><div class="ttname"><a href="structfaiss_1_1Index.html#abf601502bdbfa02b9d7bcd7b3671b71d">faiss::Index::train</a></div><div class="ttdeci">virtual void train(idx_t n, const float *x)</div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00023">Index.cpp:23</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinary_html_a132119ae93e240b54621c5c669853c7f"><div class="ttname"><a href="structfaiss_1_1IndexBinary.html#a132119ae93e240b54621c5c669853c7f">faiss::IndexBinary::is_trained</a></div><div class="ttdeci">bool is_trained</div><div class="ttdoc">set if the Index does not require training, or if training is done already </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinary_8h_source.html#l00047">IndexBinary.h:47</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinary_html_a277c2645b8def11c5d982384098c5380"><div class="ttname"><a href="structfaiss_1_1IndexBinary.html#a277c2645b8def11c5d982384098c5380">faiss::IndexBinary::code_size</a></div><div class="ttdeci">int code_size</div><div class="ttdoc">number of bytes per vector ( = d / 8 ) </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinary_8h_source.html#l00042">IndexBinary.h:42</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinary_html_a01749bbdbd3b7ec6bb9390257ab16c5c"><div class="ttname"><a href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">faiss::IndexBinary::idx_t</a></div><div class="ttdeci">Index::idx_t idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinary_8h_source.html#l00037">IndexBinary.h:37</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinary_html_a0e485a7189eec2675032486d3b12cf88"><div class="ttname"><a href="structfaiss_1_1IndexBinary.html#a0e485a7189eec2675032486d3b12cf88">faiss::IndexBinary::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinary_8h_source.html#l00041">IndexBinary.h:41</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFromFloat_html_af92913a782c65843fbf7a65e017d6f5f"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFromFloat.html#af92913a782c65843fbf7a65e017d6f5f">faiss::IndexBinaryFromFloat::search</a></div><div class="ttdeci">void search(idx_t n, const uint8_t *x, idx_t k, int32_t *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFromFloat_8cpp_source.html#l00052">IndexBinaryFromFloat.cpp:52</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a1b5e9ac70adbce0897dd6c8276ad96f2"><div class="ttname"><a href="structfaiss_1_1Index.html#a1b5e9ac70adbce0897dd6c8276ad96f2">faiss::Index::add</a></div><div class="ttdeci">virtual void add(idx_t n, const float *x)=0</div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6970683faa021b7a6f1a0865c0d4eccd"><div class="ttname"><a href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">faiss::Index::ntotal</a></div><div class="ttdeci">idx_t ntotal</div><div class="ttdoc">total nb of indexed vectors </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00067">Index.h:67</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_aced51b1ebc33c47ab3ae15ea906559a7"><div class="ttname"><a href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">faiss::Index::search</a></div><div class="ttdeci">virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const =0</div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFromFloat_html_a487be675843e3146ee15bef3ee004a85"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFromFloat.html#a487be675843e3146ee15bef3ee004a85">faiss::IndexBinaryFromFloat::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">Removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFromFloat_8cpp_source.html#l00047">IndexBinaryFromFloat.cpp:47</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinary_html_a41b6759d127475d5fcd2b3982a8f355e"><div class="ttname"><a href="structfaiss_1_1IndexBinary.html#a41b6759d127475d5fcd2b3982a8f355e">faiss::IndexBinary::ntotal</a></div><div class="ttdeci">idx_t ntotal</div><div class="ttdoc">total nb of indexed vectors </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinary_8h_source.html#l00043">IndexBinary.h:43</a></div></div>
<div class="ttc" id="namespacefaiss_html_ac8260e10cfeed08a4344b85845773e16"><div class="ttname"><a href="namespacefaiss.html#ac8260e10cfeed08a4344b85845773e16">faiss::binary_to_real</a></div><div class="ttdeci">void binary_to_real(size_t d, const uint8_t *x_in, float *x_out)</div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l01564">utils.cpp:1564</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFromFloat_html_a7de4bb8e82f0dae621c87b44cfb64404"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFromFloat.html#a7de4bb8e82f0dae621c87b44cfb64404">faiss::IndexBinaryFromFloat::train</a></div><div class="ttdeci">void train(idx_t n, const uint8_t *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFromFloat_8cpp_source.html#l00069">IndexBinaryFromFloat.cpp:69</a></div></div>
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