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<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"> * Simple Compressor (runtime function)</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"> * File : SimpleCompProcess.inl</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * Library : SimpleSource</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * Version : 1.12</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Implements : void SimpleComp::process( double &in1, double &in2 )</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * void SimpleComp::process( double &in1, double &in2, double keyLinked )</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * void SimpleCompRms::process( double &in1, double &in2 )</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"> * © 2006, ChunkWare Music Software, OPEN-SOURCE</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * copy of this software and associated documentation files (the "Software"),</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * to deal in the Software without restriction, including without limitation</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * the rights to use, copy, modify, merge, publish, distribute, sublicense,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * and/or sell copies of the Software, and to permit persons to whom the</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * Software is furnished to do so, subject to the following conditions:</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> <span class="comment"> * The above copyright notice and this permission notice shall be included in</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * all copies or substantial portions of the Software.</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * DEALINGS IN THE SOFTWARE.</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> */</span></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> <span class="preprocessor">#ifndef __SIMPLE_COMP_PROCESS_INL__</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#define __SIMPLE_COMP_PROCESS_INL__</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">namespace </span>chunkware_simple</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="comment">//-------------------------------------------------------------</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="classchunkware__simple_1_1_simple_comp.html#acf36ac11b7e27e3a6ee5d279502fd70a"> 39</a></span>  INLINE <span class="keywordtype">void</span> <a class="code" href="classchunkware__simple_1_1_simple_comp.html#acf36ac11b7e27e3a6ee5d279502fd70a">SimpleComp::process</a>( <span class="keywordtype">double</span> &in1, <span class="keywordtype">double</span> &in2 )</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  {</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="comment">// create sidechain</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  </div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">double</span> rect1 = fabs( in1 ); <span class="comment">// rectify input</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordtype">double</span> rect2 = fabs( in2 );</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>  <span class="comment">/* if desired, one could use another EnvelopeDetector to smooth</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * the rectified signal.</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">double</span> link = std::max( rect1, rect2 ); <span class="comment">// link channels with greater of 2</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"> 52</span>  <a class="code" href="classchunkware__simple_1_1_simple_comp.html#acf36ac11b7e27e3a6ee5d279502fd70a">process</a>( in1, in2, link ); <span class="comment">// rest of process</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  }</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="comment">//-------------------------------------------------------------</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="classchunkware__simple_1_1_simple_comp.html#a5db6bcd27bc1cd46d1c719734a70e2ea"> 56</a></span>  INLINE <span class="keywordtype">void</span> <a class="code" href="classchunkware__simple_1_1_simple_comp.html#acf36ac11b7e27e3a6ee5d279502fd70a">SimpleComp::process</a>( <span class="keywordtype">double</span> &in1, <span class="keywordtype">double</span> &in2, <span class="keywordtype">double</span> keyLinked )</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>  keyLinked = fabs( keyLinked ); <span class="comment">// rectify (just in case)</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">// convert key to dB</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  keyLinked += DC_OFFSET; <span class="comment">// add DC offset to avoid log( 0 )</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordtype">double</span> keydB = lin2dB( keyLinked ); <span class="comment">// convert linear -> dB</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  </div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// threshold</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordtype">double</span> overdB = keydB - threshdB_; <span class="comment">// delta over threshold</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">if</span> ( overdB < 0.0 )</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  overdB = 0.0;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  </div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// attack/release</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  overdB += DC_OFFSET; <span class="comment">// add DC offset to avoid denormal</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <a class="code" href="classchunkware__simple_1_1_att_rel_envelope.html#aa61f2be5a8fb592bde1adab28468d801">AttRelEnvelope::run</a>( overdB, envdB_ ); <span class="comment">// run attack/release envelope</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  overdB = envdB_ - DC_OFFSET; <span class="comment">// subtract DC offset</span></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="comment">/* REGARDING THE DC OFFSET: In this case, since the offset is added before </span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> * the attack/release processes, the envelope will never fall below the offset,</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> * thereby avoiding denormals. However, to prevent the offset from causing</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> * constant gain reduction, we must subtract it from the envelope, yielding</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> * a minimum value of 0dB.</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">// transfer function</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordtype">double</span> gr = overdB * ( ratio_ - 1.0 ); <span class="comment">// gain reduction (dB)</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  gr = dB2lin( gr ) * dB2lin( makeUpGain_ ); <span class="comment">// convert dB -> linear</span></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>  <span class="comment">// output gain</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  in1 *= gr; <span class="comment">// apply gain reduction to input</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  in2 *= gr;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  }</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">//-------------------------------------------------------------</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"><a class="line" href="classchunkware__simple_1_1_simple_comp_rms.html#aad45734819e3c512270358a1952a43f3"> 92</a></span>  INLINE <span class="keywordtype">void</span> <a class="code" href="classchunkware__simple_1_1_simple_comp_rms.html#aad45734819e3c512270358a1952a43f3">SimpleCompRms::process</a>( <span class="keywordtype">double</span> &in1, <span class="keywordtype">double</span> &in2 )</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  {</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="comment">// create sidechain</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="keywordtype">double</span> inSq1 = in1 * in1; <span class="comment">// square input</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordtype">double</span> inSq2 = in2 * in2;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  </div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordtype">double</span> sum = inSq1 + inSq2; <span class="comment">// power summing</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  sum += DC_OFFSET; <span class="comment">// DC offset, to prevent denormal</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  ave_.<a class="code" href="classchunkware__simple_1_1_envelope_detector.html#a59d5730de1b2aa9768462a5caff332fd">run</a>( sum, aveOfSqrs_ ); <span class="comment">// average of squares</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordtype">double</span> rms = sqrt( aveOfSqrs_ ); <span class="comment">// rms (sort of ...)</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  </div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="comment">/* REGARDING THE RMS AVERAGER: Ok, so this isn't a REAL RMS</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> * calculation. A true RMS is an FIR moving average. This</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> * approximation is a 1-pole IIR. Nonetheless, in practice,</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> * and in the interest of simplicity, this method will suffice,</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> * giving comparable results.</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>  </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <a class="code" href="classchunkware__simple_1_1_simple_comp.html#acf36ac11b7e27e3a6ee5d279502fd70a">SimpleComp::process</a>( in1, in2, rms ); <span class="comment">// rest of process</span></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>  </div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> } <span class="comment">// end namespace chunkware_simple</span></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> <span class="preprocessor">#endif </span><span class="comment">// end __SIMPLE_COMP_PROCESS_INL__</span></div>
<div class="ttc" id="aclasschunkware__simple_1_1_att_rel_envelope_html_aa61f2be5a8fb592bde1adab28468d801"><div class="ttname"><a href="classchunkware__simple_1_1_att_rel_envelope.html#aa61f2be5a8fb592bde1adab28468d801">chunkware_simple::AttRelEnvelope::run</a></div><div class="ttdeci">INLINE void run(double in, double &state)</div><div class="ttdoc">Runtime function.</div><div class="ttdef"><b>Definition:</b> <a href="_simple_envelope_8h_source.html#l00113">SimpleEnvelope.h:113</a></div></div>
<div class="ttc" id="aclasschunkware__simple_1_1_envelope_detector_html_a59d5730de1b2aa9768462a5caff332fd"><div class="ttname"><a href="classchunkware__simple_1_1_envelope_detector.html#a59d5730de1b2aa9768462a5caff332fd">chunkware_simple::EnvelopeDetector::run</a></div><div class="ttdeci">INLINE void run(double in, double &state)</div><div class="ttdoc">runtime function</div><div class="ttdef"><b>Definition:</b> <a href="_simple_envelope_8h_source.html#l00070">SimpleEnvelope.h:70</a></div></div>
<div class="ttc" id="aclasschunkware__simple_1_1_simple_comp_html_acf36ac11b7e27e3a6ee5d279502fd70a"><div class="ttname"><a href="classchunkware__simple_1_1_simple_comp.html#acf36ac11b7e27e3a6ee5d279502fd70a">chunkware_simple::SimpleComp::process</a></div><div class="ttdeci">void process(double &in1, double &in2)</div><div class="ttdoc">compressor runtime process</div><div class="ttdef"><b>Definition:</b> <a href="_simple_comp_process_8inl_source.html#l00039">SimpleCompProcess.inl:39</a></div></div>
<div class="ttc" id="aclasschunkware__simple_1_1_simple_comp_rms_html_aad45734819e3c512270358a1952a43f3"><div class="ttname"><a href="classchunkware__simple_1_1_simple_comp_rms.html#aad45734819e3c512270358a1952a43f3">chunkware_simple::SimpleCompRms::process</a></div><div class="ttdeci">void process(double &in1, double &in2)</div><div class="ttdoc">Runtime process.</div><div class="ttdef"><b>Definition:</b> <a href="_simple_comp_process_8inl_source.html#l00092">SimpleCompProcess.inl:92</a></div></div>
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