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Cubic_8h_source.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Arduino STK: Cubic.h Source File</title>
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<div id="projectname">Arduino STK
 <span id="projectnumber">4.6.2</span>
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<div class="title">Cubic.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef STK_CUBIC_H</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define STK_CUBIC_H</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>  </div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="preprocessor">#include "Function.h"</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <cmath></span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  </div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="keyword">namespace </span><a class="code" href="namespacestk.html">stk</a> {</div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  </div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">/***************************************************/</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>  </div>
<div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="classstk_1_1Cubic.html"> 29</a></span> <span class="keyword">class </span><a class="code" href="classstk_1_1Cubic.html">Cubic</a> : <span class="keyword">public</span> <a class="code" href="classstk_1_1Function.html">Function</a></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="classstk_1_1Cubic.html#a2059a20146f6d7ec0854dc860ca90895"> 33</a></span>  <a class="code" href="classstk_1_1Cubic.html#a2059a20146f6d7ec0854dc860ca90895">Cubic</a>( <span class="keywordtype">void</span> ) : a1_(0.5), a2_(0.5), a3_(0.5), gain_(1.0), threshold_(1.0) {};</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  </div>
<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="classstk_1_1Cubic.html#af4604c69f138415f9b9ee6944d2b54ef"> 36</a></span>  <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Cubic.html#af4604c69f138415f9b9ee6944d2b54ef">setA1</a>( StkFloat a1 ) { a1_ = a1; };</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="classstk_1_1Cubic.html#afa16d53e6a720936543d0e0ea778f0eb"> 39</a></span>  <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Cubic.html#afa16d53e6a720936543d0e0ea778f0eb">setA2</a>( StkFloat a2 ) { a2_ = a2; };</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  </div>
<div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="classstk_1_1Cubic.html#add4a05676471c4c09b76f5fe430b80fa"> 42</a></span>  <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Cubic.html#add4a05676471c4c09b76f5fe430b80fa">setA3</a>( StkFloat a3 ) { a3_ = a3; };</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  </div>
<div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="classstk_1_1Cubic.html#a3eca8ac3f81301592476aad7a2e1ec50"> 45</a></span>  <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Cubic.html#a3eca8ac3f81301592476aad7a2e1ec50">setGain</a>( StkFloat gain ) { gain_ = gain; };</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  </div>
<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="classstk_1_1Cubic.html#a10ba2b5c858fc2d656d49c676d5561b4"> 48</a></span>  <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Cubic.html#a10ba2b5c858fc2d656d49c676d5561b4">setThreshold</a>( StkFloat threshold ) { threshold_ = threshold; };</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  </div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  StkFloat <a class="code" href="classstk_1_1Cubic.html#a24e2270a347e0a6721bc0f7e0040117c">tick</a>( StkFloat input );</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <a class="code" href="classstk_1_1StkFrames.html">StkFrames</a>& <a class="code" href="classstk_1_1Cubic.html#a24e2270a347e0a6721bc0f7e0040117c">tick</a>( <a class="code" href="classstk_1_1StkFrames.html">StkFrames</a>& frames, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> channel = 0 );</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  </div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <a class="code" href="classstk_1_1StkFrames.html">StkFrames</a>& <a class="code" href="classstk_1_1Cubic.html#a24e2270a347e0a6721bc0f7e0040117c">tick</a>( <a class="code" href="classstk_1_1StkFrames.html">StkFrames</a>& iFrames, <a class="code" href="classstk_1_1StkFrames.html">StkFrames</a> &oFrames, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> iChannel = 0, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> oChannel = 0 );</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  </div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">protected</span>:</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>  StkFloat a1_;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  StkFloat a2_;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  StkFloat a3_;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  StkFloat gain_; </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  StkFloat threshold_;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> };</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  </div>
<div class="line"><a name="l00084"></a><span class="lineno"><a class="line" href="classstk_1_1Cubic.html#a24e2270a347e0a6721bc0f7e0040117c"> 84</a></span> <span class="keyword">inline</span> StkFloat <a class="code" href="classstk_1_1Cubic.html#a24e2270a347e0a6721bc0f7e0040117c">Cubic :: tick</a>( StkFloat input )</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  StkFloat inSquared = input * input;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  StkFloat inCubed = inSquared * input;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  </div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  lastFrame_[0] = gain_ * (a1_ * input + a2_ * inSquared + a3_ * inCubed);</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// Apply threshold if we are out of range.</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">if</span> ( fabs( lastFrame_[0] ) > threshold_ ) {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  lastFrame_[0] = ( lastFrame_[0] < 0 ? -threshold_ : threshold_ );</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  </div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">return</span> lastFrame_[0];</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> }</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  </div>
<div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="classstk_1_1Cubic.html#af3e8a1d6ffe5e9788d841343bd5722cc"> 99</a></span> <span class="keyword">inline</span> <a class="code" href="classstk_1_1StkFrames.html">StkFrames</a>& <a class="code" href="classstk_1_1Cubic.html#a24e2270a347e0a6721bc0f7e0040117c">Cubic :: tick</a>( <a class="code" href="classstk_1_1StkFrames.html">StkFrames</a>& frames, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> channel )</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> {</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="preprocessor">#if defined(_STK_DEBUG_)</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">if</span> ( channel >= frames.<a class="code" href="classstk_1_1StkFrames.html#a0340d9e76707282658e49509a568f60e">channels</a>() ) {</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  oStream_ << <span class="stringliteral">"Cubic::tick(): channel and StkFrames arguments are incompatible!"</span>;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <a class="code" href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff">handleError</a>( StkError::FUNCTION_ARGUMENT );</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  }</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  StkFloat *samples = &frames[channel];</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> hop = frames.<a class="code" href="classstk_1_1StkFrames.html#a0340d9e76707282658e49509a568f60e">channels</a>();</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">for</span> ( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<frames.<a class="code" href="classstk_1_1StkFrames.html#a0fc22e21feecdee966f0203722b9c168">frames</a>(); i++, samples += hop )</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  *samples = <a class="code" href="classstk_1_1Cubic.html#a24e2270a347e0a6721bc0f7e0040117c">tick</a>( *samples );</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  lastFrame_[0] = *(samples-hop);</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">return</span> frames;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  </div>
<div class="line"><a name="l00117"></a><span class="lineno"><a class="line" href="classstk_1_1Cubic.html#aef7887fe7e5131ce48c8488a21d295b9"> 117</a></span> <span class="keyword">inline</span> <a class="code" href="classstk_1_1StkFrames.html">StkFrames</a>& <a class="code" href="classstk_1_1Cubic.html#a24e2270a347e0a6721bc0f7e0040117c">Cubic :: tick</a>( <a class="code" href="classstk_1_1StkFrames.html">StkFrames</a>& iFrames, <a class="code" href="classstk_1_1StkFrames.html">StkFrames</a>& oFrames, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> iChannel, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> oChannel )</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="preprocessor">#if defined(_STK_DEBUG_)</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">if</span> ( iChannel >= iFrames.<a class="code" href="classstk_1_1StkFrames.html#a0340d9e76707282658e49509a568f60e">channels</a>() || oChannel >= oFrames.<a class="code" href="classstk_1_1StkFrames.html#a0340d9e76707282658e49509a568f60e">channels</a>() ) {</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  oStream_ << <span class="stringliteral">"Cubic::tick(): channel and StkFrames arguments are incompatible!"</span>;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <a class="code" href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff">handleError</a>( StkError::FUNCTION_ARGUMENT );</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  }</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  </div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  StkFloat *iSamples = &iFrames[iChannel];</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  StkFloat *oSamples = &oFrames[oChannel];</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> iHop = iFrames.<a class="code" href="classstk_1_1StkFrames.html#a0340d9e76707282658e49509a568f60e">channels</a>(), oHop = oFrames.<a class="code" href="classstk_1_1StkFrames.html#a0340d9e76707282658e49509a568f60e">channels</a>();</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">for</span> ( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<iFrames.<a class="code" href="classstk_1_1StkFrames.html#a0fc22e21feecdee966f0203722b9c168">frames</a>(); i++, iSamples += iHop, oSamples += oHop )</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  *oSamples = <a class="code" href="classstk_1_1Cubic.html#a24e2270a347e0a6721bc0f7e0040117c">tick</a>( *iSamples );</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  </div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  lastFrame_[0] = *(oSamples-oHop);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">return</span> iFrames;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> }</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  </div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> } <span class="comment">// stk namespace</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  </div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="preprocessor">#endif</span></div>
<div class="ttc" id="aclassstk_1_1Cubic_html"><div class="ttname"><a href="classstk_1_1Cubic.html">stk::Cubic</a></div><div class="ttdoc">STK cubic non-linearity class.</div><div class="ttdef"><b>Definition:</b> Cubic.h:30</div></div>
<div class="ttc" id="aclassstk_1_1Cubic_html_a10ba2b5c858fc2d656d49c676d5561b4"><div class="ttname"><a href="classstk_1_1Cubic.html#a10ba2b5c858fc2d656d49c676d5561b4">stk::Cubic::setThreshold</a></div><div class="ttdeci">void setThreshold(StkFloat threshold)</div><div class="ttdoc">Set the threshold value.</div><div class="ttdef"><b>Definition:</b> Cubic.h:48</div></div>
<div class="ttc" id="aclassstk_1_1Cubic_html_a2059a20146f6d7ec0854dc860ca90895"><div class="ttname"><a href="classstk_1_1Cubic.html#a2059a20146f6d7ec0854dc860ca90895">stk::Cubic::Cubic</a></div><div class="ttdeci">Cubic(void)</div><div class="ttdoc">Default constructor.</div><div class="ttdef"><b>Definition:</b> Cubic.h:33</div></div>
<div class="ttc" id="aclassstk_1_1Cubic_html_a24e2270a347e0a6721bc0f7e0040117c"><div class="ttname"><a href="classstk_1_1Cubic.html#a24e2270a347e0a6721bc0f7e0040117c">stk::Cubic::tick</a></div><div class="ttdeci">StkFloat tick(StkFloat input)</div><div class="ttdoc">Input one sample to the function and return one output.</div><div class="ttdef"><b>Definition:</b> Cubic.h:84</div></div>
<div class="ttc" id="aclassstk_1_1Cubic_html_a3eca8ac3f81301592476aad7a2e1ec50"><div class="ttname"><a href="classstk_1_1Cubic.html#a3eca8ac3f81301592476aad7a2e1ec50">stk::Cubic::setGain</a></div><div class="ttdeci">void setGain(StkFloat gain)</div><div class="ttdoc">Set the gain value.</div><div class="ttdef"><b>Definition:</b> Cubic.h:45</div></div>
<div class="ttc" id="aclassstk_1_1Cubic_html_add4a05676471c4c09b76f5fe430b80fa"><div class="ttname"><a href="classstk_1_1Cubic.html#add4a05676471c4c09b76f5fe430b80fa">stk::Cubic::setA3</a></div><div class="ttdeci">void setA3(StkFloat a3)</div><div class="ttdoc">Set the a3 coefficient value.</div><div class="ttdef"><b>Definition:</b> Cubic.h:42</div></div>
<div class="ttc" id="aclassstk_1_1Cubic_html_af4604c69f138415f9b9ee6944d2b54ef"><div class="ttname"><a href="classstk_1_1Cubic.html#af4604c69f138415f9b9ee6944d2b54ef">stk::Cubic::setA1</a></div><div class="ttdeci">void setA1(StkFloat a1)</div><div class="ttdoc">Set the a1 coefficient value.</div><div class="ttdef"><b>Definition:</b> Cubic.h:36</div></div>
<div class="ttc" id="aclassstk_1_1Cubic_html_afa16d53e6a720936543d0e0ea778f0eb"><div class="ttname"><a href="classstk_1_1Cubic.html#afa16d53e6a720936543d0e0ea778f0eb">stk::Cubic::setA2</a></div><div class="ttdeci">void setA2(StkFloat a2)</div><div class="ttdoc">Set the a2 coefficient value.</div><div class="ttdef"><b>Definition:</b> Cubic.h:39</div></div>
<div class="ttc" id="aclassstk_1_1Function_html"><div class="ttname"><a href="classstk_1_1Function.html">stk::Function</a></div><div class="ttdoc">STK abstract function parent class.</div><div class="ttdef"><b>Definition:</b> Function.h:21</div></div>
<div class="ttc" id="aclassstk_1_1StkFrames_html"><div class="ttname"><a href="classstk_1_1StkFrames.html">stk::StkFrames</a></div><div class="ttdoc">An STK class to handle vectorized audio data.</div><div class="ttdef"><b>Definition:</b> Stk.h:287</div></div>
<div class="ttc" id="aclassstk_1_1StkFrames_html_a0340d9e76707282658e49509a568f60e"><div class="ttname"><a href="classstk_1_1StkFrames.html#a0340d9e76707282658e49509a568f60e">stk::StkFrames::channels</a></div><div class="ttdeci">unsigned int channels(void) const</div><div class="ttdoc">Return the number of channels represented by the data.</div><div class="ttdef"><b>Definition:</b> Stk.h:415</div></div>
<div class="ttc" id="aclassstk_1_1StkFrames_html_a0fc22e21feecdee966f0203722b9c168"><div class="ttname"><a href="classstk_1_1StkFrames.html#a0fc22e21feecdee966f0203722b9c168">stk::StkFrames::frames</a></div><div class="ttdeci">unsigned int frames(void) const</div><div class="ttdoc">Return the number of sample frames represented by the data.</div><div class="ttdef"><b>Definition:</b> Stk.h:418</div></div>
<div class="ttc" id="aclassstk_1_1Stk_html_a48ac73a0d8ca28445ba1a054e1f061ff"><div class="ttname"><a href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff">stk::Stk::handleError</a></div><div class="ttdeci">static void handleError(const char *message, StkError::Type type)</div><div class="ttdoc">Static function for error reporting and handling using c-strings.</div></div>
<div class="ttc" id="anamespacestk_html"><div class="ttname"><a href="namespacestk.html">stk</a></div><div class="ttdoc">The STK namespace.</div><div class="ttdef"><b>Definition:</b> ADSR.h:8</div></div>
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