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<a href="pitch_8h.html">Go to the documentation of this file.</a><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) 2003-2013 Paul Brossier <piem@aubio.org></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 file is part of aubio.</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> aubio is free software: you can redistribute it and/or modify</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> it under the terms of the GNU General Public License as published by</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> the Free Software Foundation, either version 3 of the License, or</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> (at your option) any later version.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> aubio is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> GNU General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> You should have received a copy of the GNU General Public License</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> along with aubio. If not, see <http://www.gnu.org/licenses/>.</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">*/</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#ifndef _AUBIO_PITCH_H</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#define _AUBIO_PITCH_H</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#ifdef __cplusplus</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">/** \file</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> Pitch detection object</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> This file creates the objects required for the computation of the selected</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> pitch detection algorithm and output the results, in midi note or Hz.</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> \section pitch Pitch detection methods</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"></span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> A list of the pitch detection methods currently available follows.</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"></span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> \b \p default : use the default method</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"></span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> Currently, the default method is set to \p yinfft .</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"></span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> \b \p schmitt : Schmitt trigger</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"></span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> This pitch extraction method implements a Schmitt trigger to estimate the</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> period of a signal.</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"></span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> This file was derived from the tuneit project, written by Mario Lang to</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> detect the fundamental frequency of a sound.</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"></span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> See http://delysid.org/tuneit.html</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"></span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> \b \p fcomb : a fast harmonic comb filter</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"></span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> This pitch extraction method implements a fast harmonic comb filter to</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> determine the fundamental frequency of a harmonic sound.</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"></span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> This file was derived from the tuneit project, written by Mario Lang to</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> detect the fundamental frequency of a sound.</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"></span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> See http://delysid.org/tuneit.html</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"></span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> \b \p mcomb : multiple-comb filter</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"></span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> This fundamental frequency estimation algorithm implements spectral</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> flattening, multi-comb filtering and peak histogramming.</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"></span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> This method was designed by Juan P. Bello and described in:</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"></span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> Juan-Pablo Bello. ``Towards the Automated Analysis of Simple Polyphonic</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> Music''. PhD thesis, Centre for Digital Music, Queen Mary University of</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> London, London, UK, 2003.</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"></span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> \b \p yin : YIN algorithm</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"></span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> This algorithm was developed by A. de Cheveigne and H. Kawahara and</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> published in:</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"></span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> De Cheveigné, A., Kawahara, H. (2002) "YIN, a fundamental frequency</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> estimator for speech and music", J. Acoust. Soc. Am. 111, 1917-1930.</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"></span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> see http://recherche.ircam.fr/equipes/pcm/pub/people/cheveign.html</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"></span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> \b \p yinfft : Yinfft algorithm</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"></span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> This algorithm was derived from the YIN algorithm. In this implementation, a</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> Fourier transform is used to compute a tapered square difference function,</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> which allows spectral weighting. Because the difference function is tapered,</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> the selection of the period is simplified.</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"></span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> Paul Brossier, [Automatic annotation of musical audio for interactive</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> systems](http://aubio.org/phd/), Chapter 3, Pitch Analysis, PhD thesis,</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> Centre for Digital music, Queen Mary University of London, London, UK, 2006.</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"></span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"> \example pitch/test-pitch.c</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"> \example examples/aubiopitch.c</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"></span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">*/</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"></span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">/** pitch detection object */</span></div><div class="line"><a name="l00101"></a><span class="lineno"><a class="line" href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0"> 101</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span>_aubio_pitch_t <a class="code" href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0">aubio_pitch_t</a>;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"></span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment">/** execute pitch detection on an input signal frame</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"></span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> \param o pitch detection object as returned by new_aubio_pitch()</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> \param in input signal of size [hop_size]</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> \param out output pitch candidates of size [1]</span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"></span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment">*/</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="keywordtype">void</span> <a class="code" href="pitch_8h.html#aa813fd341d5af4c0dc672e319b0f0195">aubio_pitch_do</a> (<a class="code" href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0">aubio_pitch_t</a> * o, <a class="code" href="structfvec__t.html">fvec_t</a> * in, <a class="code" href="structfvec__t.html">fvec_t</a> * out);</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"></span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment">/** change yin or yinfft tolerance threshold</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"></span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> \param o pitch detection object as returned by new_aubio_pitch()</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> \param tol tolerance default is 0.15 for yin and 0.85 for yinfft</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"></span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment">*/</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <a class="code" href="types_8h.html#a12a1e9b3ce141648783a82445d02b58d">uint_t</a> <a class="code" href="pitch_8h.html#ac7f0342944d7fde3cd509021069ee74d">aubio_pitch_set_tolerance</a> (<a class="code" href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0">aubio_pitch_t</a> * o, <a class="code" href="types_8h.html#a5d7119468d78a1dc35cf76d0adfb1436">smpl_t</a> tol);</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"></span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment">/** deletion of the pitch detection object</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"></span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> \param o pitch detection object as returned by new_aubio_pitch()</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"></span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment">*/</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="keywordtype">void</span> <a class="code" href="pitch_8h.html#a23f6b16eabb9bff3c4ee5876af69f832">del_aubio_pitch</a> (<a class="code" href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0">aubio_pitch_t</a> * o);</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"></span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment">/** creation of the pitch detection object</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"></span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> \param method set pitch detection algorithm</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> \param buf_size size of the input buffer to analyse</span></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> \param hop_size step size between two consecutive analysis instant</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> \param samplerate sampling rate of the signal</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"></span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> \return newly created ::aubio_pitch_t</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"></span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment">*/</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <a class="code" href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0">aubio_pitch_t</a> *<a class="code" href="pitch_8h.html#a962561ea270e0308ed26ac9bab554550">new_aubio_pitch</a> (<a class="code" href="types_8h.html#a40bb5262bf908c328fbcfbe5d29d0201">char_t</a> * method,</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <a class="code" href="types_8h.html#a12a1e9b3ce141648783a82445d02b58d">uint_t</a> buf_size, <a class="code" href="types_8h.html#a12a1e9b3ce141648783a82445d02b58d">uint_t</a> hop_size, <a class="code" href="types_8h.html#a12a1e9b3ce141648783a82445d02b58d">uint_t</a> samplerate);</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"></span></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment">/** set the output unit of the pitch detection object</span></div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="comment"></span></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment"> \param o pitch detection object as returned by new_aubio_pitch()</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment"> \param mode set pitch units for output</span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"></span></div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> \return 0 if successfull, non-zero otherwise</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment"></span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment">*/</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <a class="code" href="types_8h.html#a12a1e9b3ce141648783a82445d02b58d">uint_t</a> <a class="code" href="pitch_8h.html#aa4fa64844cbcedd81127643e0093103c">aubio_pitch_set_unit</a> (<a class="code" href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0">aubio_pitch_t</a> * o, <a class="code" href="types_8h.html#a40bb5262bf908c328fbcfbe5d29d0201">char_t</a> * mode);</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment"></span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment">/** set the silence threshold of the pitch detection object</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"></span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> \param o pitch detection object as returned by new_aubio_pitch()</span></div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> \param silence level threshold under which pitch should be ignored, in dB</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment"></span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"> \return 0 if successfull, non-zero otherwise</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"></span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment">*/</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <a class="code" href="types_8h.html#a12a1e9b3ce141648783a82445d02b58d">uint_t</a> <a class="code" href="pitch_8h.html#afc207da0622a9cedb601a3b84b3fd543">aubio_pitch_set_silence</a> (<a class="code" href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0">aubio_pitch_t</a> * o, <a class="code" href="types_8h.html#a5d7119468d78a1dc35cf76d0adfb1436">smpl_t</a> silence);</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"></span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment">/** set the silence threshold of the pitch detection object</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"></span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment"> \param o pitch detection object as returned by ::new_aubio_pitch()</span></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment"></span></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment"> \return level threshold under which pitch should be ignored, in dB</span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment"></span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment">*/</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <a class="code" href="types_8h.html#a5d7119468d78a1dc35cf76d0adfb1436">smpl_t</a> <a class="code" href="pitch_8h.html#a1126a64e6d10693ec3f0c957d3a73748">aubio_pitch_get_silence</a> (<a class="code" href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0">aubio_pitch_t</a> * o);</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"></span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment">/** get the current confidence</span></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"></span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"> \param o pitch detection object as returned by new_aubio_pitch()</span></div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"></span></div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> \return the current confidence of the pitch algorithm</span></div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"></span></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment">*/</span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <a class="code" href="types_8h.html#a5d7119468d78a1dc35cf76d0adfb1436">smpl_t</a> <a class="code" href="pitch_8h.html#a42f54a97032b485dab12ab54e0c9fa78">aubio_pitch_get_confidence</a> (<a class="code" href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0">aubio_pitch_t</a> * o);</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> </div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="preprocessor">#ifdef __cplusplus</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> }</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="preprocessor">#endif </span><span class="comment">/* _AUBIO_PITCH_H */</span><span class="preprocessor"></span></div><div class="ttc" id="types_8h_html_a5d7119468d78a1dc35cf76d0adfb1436"><div class="ttname"><a href="types_8h.html#a5d7119468d78a1dc35cf76d0adfb1436">smpl_t</a></div><div class="ttdeci">float smpl_t</div><div class="ttdoc">short sample format (32 or 64 bits) </div><div class="ttdef"><b>Definition:</b> <a href="types_8h_source.html#l00041">types.h:41</a></div></div>
<div class="ttc" id="pitch_8h_html_afc207da0622a9cedb601a3b84b3fd543"><div class="ttname"><a href="pitch_8h.html#afc207da0622a9cedb601a3b84b3fd543">aubio_pitch_set_silence</a></div><div class="ttdeci">uint_t aubio_pitch_set_silence(aubio_pitch_t *o, smpl_t silence)</div><div class="ttdoc">set the silence threshold of the pitch detection object </div></div>
<div class="ttc" id="pitch_8h_html_a1126a64e6d10693ec3f0c957d3a73748"><div class="ttname"><a href="pitch_8h.html#a1126a64e6d10693ec3f0c957d3a73748">aubio_pitch_get_silence</a></div><div class="ttdeci">smpl_t aubio_pitch_get_silence(aubio_pitch_t *o)</div><div class="ttdoc">set the silence threshold of the pitch detection object </div></div>
<div class="ttc" id="pitch_8h_html_ac7f0342944d7fde3cd509021069ee74d"><div class="ttname"><a href="pitch_8h.html#ac7f0342944d7fde3cd509021069ee74d">aubio_pitch_set_tolerance</a></div><div class="ttdeci">uint_t aubio_pitch_set_tolerance(aubio_pitch_t *o, smpl_t tol)</div><div class="ttdoc">change yin or yinfft tolerance threshold </div></div>
<div class="ttc" id="pitch_8h_html_a23f6b16eabb9bff3c4ee5876af69f832"><div class="ttname"><a href="pitch_8h.html#a23f6b16eabb9bff3c4ee5876af69f832">del_aubio_pitch</a></div><div class="ttdeci">void del_aubio_pitch(aubio_pitch_t *o)</div><div class="ttdoc">deletion of the pitch detection object </div></div>
<div class="ttc" id="pitch_8h_html_a962561ea270e0308ed26ac9bab554550"><div class="ttname"><a href="pitch_8h.html#a962561ea270e0308ed26ac9bab554550">new_aubio_pitch</a></div><div class="ttdeci">aubio_pitch_t * new_aubio_pitch(char_t *method, uint_t buf_size, uint_t hop_size, uint_t samplerate)</div><div class="ttdoc">creation of the pitch detection object </div></div>
<div class="ttc" id="pitch_8h_html_aa4fa64844cbcedd81127643e0093103c"><div class="ttname"><a href="pitch_8h.html#aa4fa64844cbcedd81127643e0093103c">aubio_pitch_set_unit</a></div><div class="ttdeci">uint_t aubio_pitch_set_unit(aubio_pitch_t *o, char_t *mode)</div><div class="ttdoc">set the output unit of the pitch detection object </div></div>
<div class="ttc" id="pitch_8h_html_a42f54a97032b485dab12ab54e0c9fa78"><div class="ttname"><a href="pitch_8h.html#a42f54a97032b485dab12ab54e0c9fa78">aubio_pitch_get_confidence</a></div><div class="ttdeci">smpl_t aubio_pitch_get_confidence(aubio_pitch_t *o)</div><div class="ttdoc">get the current confidence </div></div>
<div class="ttc" id="pitch_8h_html_aa813fd341d5af4c0dc672e319b0f0195"><div class="ttname"><a href="pitch_8h.html#aa813fd341d5af4c0dc672e319b0f0195">aubio_pitch_do</a></div><div class="ttdeci">void aubio_pitch_do(aubio_pitch_t *o, fvec_t *in, fvec_t *out)</div><div class="ttdoc">execute pitch detection on an input signal frame </div></div>
<div class="ttc" id="structfvec__t_html"><div class="ttname"><a href="structfvec__t.html">fvec_t</a></div><div class="ttdoc">Buffer for real data. </div><div class="ttdef"><b>Definition:</b> <a href="fvec_8h_source.html#l00067">fvec.h:67</a></div></div>
<div class="ttc" id="types_8h_html_a12a1e9b3ce141648783a82445d02b58d"><div class="ttname"><a href="types_8h.html#a12a1e9b3ce141648783a82445d02b58d">uint_t</a></div><div class="ttdeci">unsigned int uint_t</div><div class="ttdoc">unsigned integer </div><div class="ttdef"><b>Definition:</b> <a href="types_8h_source.html#l00060">types.h:60</a></div></div>
<div class="ttc" id="types_8h_html_a40bb5262bf908c328fbcfbe5d29d0201"><div class="ttname"><a href="types_8h.html#a40bb5262bf908c328fbcfbe5d29d0201">char_t</a></div><div class="ttdeci">char char_t</div><div class="ttdoc">character </div><div class="ttdef"><b>Definition:</b> <a href="types_8h_source.html#l00064">types.h:64</a></div></div>
<div class="ttc" id="pitch_8h_html_af76b14582e2b766e6b325038fe6426a0"><div class="ttname"><a href="pitch_8h.html#af76b14582e2b766e6b325038fe6426a0">aubio_pitch_t</a></div><div class="ttdeci">struct _aubio_pitch_t aubio_pitch_t</div><div class="ttdoc">pitch detection object </div><div class="ttdef"><b>Definition:</b> <a href="pitch_8h_source.html#l00101">pitch.h:101</a></div></div>
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