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<div class="headertitle"><div class="title">DCBlocker.h</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> ==============================================================================</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> </span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment"> This file is part of the iPlug 2 library. Copyright (C) the iPlug 2 developers. </span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"> </span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment"> See LICENSE.txt for more info.</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment"> </span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment"> ==============================================================================</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment">*/</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include "denormal.h"</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include "<a class="code" href="_i_plug_constants_8h.html">IPlugConstants.h</a>"</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span>BEGIN_IPLUG_NAMESPACE</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keywordtype">int</span> NC = 1></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"><a class="line" href="class_d_c_blocker.html"> 18</a></span><span class="keyword">class </span><a class="code hl_class" href="class_d_c_blocker.html">DCBlocker</a></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span>{</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// one pole IIR</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// y[n] = x[n] + a[n] * y[n-1]</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">class </span>rpole {</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> T y_m1 = 0;</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">public</span>:</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">inline</span> T process(T x, T a) { </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">const</span> T y = y_m1 = x + a * y_m1;</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> denormal_fix(&y_m1);</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="keywordflow">return</span> y;</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> }</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> };</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="comment">// one zero FIR</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="comment">// y[n] = x[n] - b[n] * x[n-1]</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">class </span>rzero {</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> T x_m1 = 0;</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">public</span>:</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">inline</span> T process(T x, T b) {</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">const</span> T y = x - b * x_m1;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> x_m1 = x;</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> denormal_fix(&x_m1);</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordflow">return</span> y;</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> }</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> };</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> rpole mPole[NC];</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> rzero mZero[NC];</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordtype">void</span> ProcessBlock(T** inputs, T** outputs, <span class="keywordtype">int</span> nChans, <span class="keywordtype">int</span> nFrames)</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> {</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> assert(nChans <= NC);</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> </div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span> s=0; s<nFrames; s++)</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> {</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span> c = 0; c < nChans; c++)</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> {</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">const</span> <span class="keyword">auto</span> x = inputs[c][s];</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> outputs[c][s] = mPole[c].process(mZero[c].process(x, T(1.0)), T(0.995));</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> }</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> }</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> }</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span>} WDL_FIXALIGN;</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> </div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span>END_IPLUG_NAMESPACE</div>
<div class="ttc" id="a_i_plug_constants_8h_html"><div class="ttname"><a href="_i_plug_constants_8h.html">IPlugConstants.h</a></div><div class="ttdoc">IPlug Constant definitions, Types, magic numbers.</div></div>
<div class="ttc" id="aclass_d_c_blocker_html"><div class="ttname"><a href="class_d_c_blocker.html">DCBlocker</a></div><div class="ttdef"><b>Definition:</b> <a href="_d_c_blocker_8h_source.html#l00018">DCBlocker.h:19</a></div></div>
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