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<a href="biquadfilter_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">// SPDX-FileCopyrightText: Copyright (C) 2019 swift Project Community / Contributors</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-swift-pilot-client-1</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>  </div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>  </div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#ifndef BLACKSOUND_DSP_BIQUADFILTER_H</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#define BLACKSOUND_DSP_BIQUADFILTER_H</span></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="preprocessor">#include "<a class="code" href="blacksoundexport_8h.html">blacksound/blacksoundexport.h</a>"</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="keyword">namespace </span>BlackSound::Dsp</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> {</div>
<div class="line"><a name="l00014"></a><span class="lineno"><a class="line" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html"> 14</a></span>  <span class="keyword">class </span><a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html">BiQuadFilter</a></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  {</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#ae2f56fbb9085a2788741899bfef29f36"> 18</a></span>  <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#ae2f56fbb9085a2788741899bfef29f36">BiQuadFilter</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keywordtype">float</span> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#a8a6276ec926d8daec90e8829d21e4571">transform</a>(<span class="keywordtype">float</span> inSample);</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keywordtype">void</span> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#a1f08856b7ab3535bd2c107eb6c942ab1">setCoefficients</a>(<span class="keywordtype">double</span> aa0, <span class="keywordtype">double</span> aa1, <span class="keywordtype">double</span> aa2, <span class="keywordtype">double</span> b0, <span class="keywordtype">double</span> b1, <span class="keywordtype">double</span> b2);</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keywordtype">void</span> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#a4b6c4bc16626faf25da5185909eb6fc1">setLowPassFilter</a>(<span class="keywordtype">float</span> sampleRate, <span class="keywordtype">float</span> cutoffFrequency, <span class="keywordtype">float</span> q);</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keywordtype">void</span> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#a188ee291770f8b0725a3649fa8c7ad66">setPeakingEq</a>(<span class="keywordtype">float</span> sampleRate, <span class="keywordtype">float</span> centreFrequency, <span class="keywordtype">float</span> q, <span class="keywordtype">float</span> dbGain);</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keywordtype">void</span> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#adf21f3dffbc74232e16b413b169927d5">setHighPassFilter</a>(<span class="keywordtype">float</span> sampleRate, <span class="keywordtype">float</span> cutoffFrequency, <span class="keywordtype">float</span> q);</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  </div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">static</span> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html">BiQuadFilter</a> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#ae7686fc81518044ba5d869b82c465531">lowPassFilter</a>(<span class="keywordtype">float</span> sampleRate, <span class="keywordtype">float</span> cutoffFrequency, <span class="keywordtype">float</span> q);</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">static</span> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html">BiQuadFilter</a> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#a743acd242cd8a79673f70a4696a3d846">highPassFilter</a>(<span class="keywordtype">float</span> sampleRate, <span class="keywordtype">float</span> cutoffFrequency, <span class="keywordtype">float</span> q);</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">static</span> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html">BiQuadFilter</a> <a class="code" href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#aae08c512c88cad5f4f32397de45dd4ac">peakingEQ</a>(<span class="keywordtype">float</span> sampleRate, <span class="keywordtype">float</span> centreFrequency, <span class="keywordtype">float</span> q, <span class="keywordtype">float</span> dbGain);</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="keyword">private</span>:</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordtype">double</span> m_a0 = 0.0;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keywordtype">double</span> m_a1 = 0.0;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">double</span> m_a2 = 0.0;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordtype">double</span> m_a3 = 0.0;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">double</span> m_a4 = 0.0;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// state</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordtype">float</span> m_x1 = 0.0;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordtype">float</span> m_x2 = 0.0;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordtype">float</span> m_y1 = 0.0;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordtype">float</span> m_y2 = 0.0;</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> } <span class="comment">// ns</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  </div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#endif </span><span class="comment">// guard</span></div>
<div class="ttc" id="ablacksoundexport_8h_html"><div class="ttname"><a href="blacksoundexport_8h.html">blacksoundexport.h</a></div></div>
<div class="ttc" id="aclass_black_sound_1_1_dsp_1_1_bi_quad_filter_html"><div class="ttname"><a href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html">BlackSound::Dsp::BiQuadFilter</a></div><div class="ttdoc">Digital biquad filter.</div><div class="ttdef"><b>Definition:</b> <a href="biquadfilter_8h_source.html#l00014">biquadfilter.h:15</a></div></div>
<div class="ttc" id="aclass_black_sound_1_1_dsp_1_1_bi_quad_filter_html_a188ee291770f8b0725a3649fa8c7ad66"><div class="ttname"><a href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#a188ee291770f8b0725a3649fa8c7ad66">BlackSound::Dsp::BiQuadFilter::setPeakingEq</a></div><div class="ttdeci">void setPeakingEq(float sampleRate, float centreFrequency, float q, float dbGain)</div><div class="ttdoc">Set filter parameters.</div><div class="ttdef"><b>Definition:</b> <a href="biquadfilter_8cpp_source.html#l00060">biquadfilter.cpp:60</a></div></div>
<div class="ttc" id="aclass_black_sound_1_1_dsp_1_1_bi_quad_filter_html_a1f08856b7ab3535bd2c107eb6c942ab1"><div class="ttname"><a href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#a1f08856b7ab3535bd2c107eb6c942ab1">BlackSound::Dsp::BiQuadFilter::setCoefficients</a></div><div class="ttdeci">void setCoefficients(double aa0, double aa1, double aa2, double b0, double b1, double b2)</div><div class="ttdoc">Set filter parameters.</div><div class="ttdef"><b>Definition:</b> <a href="biquadfilter_8cpp_source.html#l00032">biquadfilter.cpp:32</a></div></div>
<div class="ttc" id="aclass_black_sound_1_1_dsp_1_1_bi_quad_filter_html_a4b6c4bc16626faf25da5185909eb6fc1"><div class="ttname"><a href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#a4b6c4bc16626faf25da5185909eb6fc1">BlackSound::Dsp::BiQuadFilter::setLowPassFilter</a></div><div class="ttdeci">void setLowPassFilter(float sampleRate, float cutoffFrequency, float q)</div><div class="ttdoc">Set filter parameters.</div><div class="ttdef"><b>Definition:</b> <a href="biquadfilter_8cpp_source.html#l00044">biquadfilter.cpp:44</a></div></div>
<div class="ttc" id="aclass_black_sound_1_1_dsp_1_1_bi_quad_filter_html_a743acd242cd8a79673f70a4696a3d846"><div class="ttname"><a href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#a743acd242cd8a79673f70a4696a3d846">BlackSound::Dsp::BiQuadFilter::highPassFilter</a></div><div class="ttdeci">static BiQuadFilter highPassFilter(float sampleRate, float cutoffFrequency, float q)</div><div class="ttdoc">Get filters.</div><div class="ttdef"><b>Definition:</b> <a href="biquadfilter_8cpp_source.html#l00101">biquadfilter.cpp:101</a></div></div>
<div class="ttc" id="aclass_black_sound_1_1_dsp_1_1_bi_quad_filter_html_a8a6276ec926d8daec90e8829d21e4571"><div class="ttname"><a href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#a8a6276ec926d8daec90e8829d21e4571">BlackSound::Dsp::BiQuadFilter::transform</a></div><div class="ttdeci">float transform(float inSample)</div><div class="ttdoc">Transform.</div><div class="ttdef"><b>Definition:</b> <a href="biquadfilter_8cpp_source.html#l00016">biquadfilter.cpp:16</a></div></div>
<div class="ttc" id="aclass_black_sound_1_1_dsp_1_1_bi_quad_filter_html_aae08c512c88cad5f4f32397de45dd4ac"><div class="ttname"><a href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#aae08c512c88cad5f4f32397de45dd4ac">BlackSound::Dsp::BiQuadFilter::peakingEQ</a></div><div class="ttdeci">static BiQuadFilter peakingEQ(float sampleRate, float centreFrequency, float q, float dbGain)</div><div class="ttdoc">Get filters.</div><div class="ttdef"><b>Definition:</b> <a href="biquadfilter_8cpp_source.html#l00108">biquadfilter.cpp:108</a></div></div>
<div class="ttc" id="aclass_black_sound_1_1_dsp_1_1_bi_quad_filter_html_adf21f3dffbc74232e16b413b169927d5"><div class="ttname"><a href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#adf21f3dffbc74232e16b413b169927d5">BlackSound::Dsp::BiQuadFilter::setHighPassFilter</a></div><div class="ttdeci">void setHighPassFilter(float sampleRate, float cutoffFrequency, float q)</div><div class="ttdoc">Set filter parameters.</div><div class="ttdef"><b>Definition:</b> <a href="biquadfilter_8cpp_source.html#l00078">biquadfilter.cpp:78</a></div></div>
<div class="ttc" id="aclass_black_sound_1_1_dsp_1_1_bi_quad_filter_html_ae2f56fbb9085a2788741899bfef29f36"><div class="ttname"><a href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#ae2f56fbb9085a2788741899bfef29f36">BlackSound::Dsp::BiQuadFilter::BiQuadFilter</a></div><div class="ttdeci">BiQuadFilter()=default</div><div class="ttdoc">Ctor.</div></div>
<div class="ttc" id="aclass_black_sound_1_1_dsp_1_1_bi_quad_filter_html_ae7686fc81518044ba5d869b82c465531"><div class="ttname"><a href="class_black_sound_1_1_dsp_1_1_bi_quad_filter.html#ae7686fc81518044ba5d869b82c465531">BlackSound::Dsp::BiQuadFilter::lowPassFilter</a></div><div class="ttdeci">static BiQuadFilter lowPassFilter(float sampleRate, float cutoffFrequency, float q)</div><div class="ttdoc">Get filters.</div><div class="ttdef"><b>Definition:</b> <a href="biquadfilter_8cpp_source.html#l00094">biquadfilter.cpp:94</a></div></div>
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