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<a href="_control_ramp_8h.html">Go to the documentation of this file.</a><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> </div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include <array></span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor">#include <functional></span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor">#include <iostream></span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#include <utility></span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> </div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span>BEGIN_IPLUG_NAMESPACE</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"><a class="line" href="struct_control_ramp.html"> 32</a></span><span class="keyword">struct </span><a class="code hl_struct" href="struct_control_ramp.html">ControlRamp</a></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span>{</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="keywordtype">double</span> startValue;</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="keywordtype">double</span> endValue;</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> <span class="keywordtype">int</span> transitionStart;</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keywordtype">int</span> transitionEnd;</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="keywordtype">void</span> Clear()</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> {</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> startValue = endValue = 0.;</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> transitionStart = transitionEnd = 0;</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> <span class="keywordtype">bool</span> IsNonzero()<span class="keyword"> const</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="keyword"> </span>{</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordflow">return</span> (startValue != 0.) || (endValue != 0.);</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> </div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"><a class="line" href="struct_control_ramp.html#afe7409f59d08cca0f0f84da969697481"> 54</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="struct_control_ramp.html#afe7409f59d08cca0f0f84da969697481">Write</a>(<span class="keywordtype">float</span>* buffer, <span class="keywordtype">int</span> startIdx, <span class="keywordtype">int</span> nFrames)</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> {</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keywordtype">float</span> val = <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(startValue);</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keywordtype">float</span> dv = <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>((endValue - startValue)/(transitionEnd - transitionStart));</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="keywordflow">for</span>(<span class="keywordtype">int</span> i=startIdx; i<startIdx + transitionStart; ++i)</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> {</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> buffer[i] = val;</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> <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=startIdx + transitionStart; i<startIdx + transitionEnd; ++i)</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> val += dv;</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> buffer[i] = val;</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> }</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=startIdx + transitionEnd; i<startIdx + nFrames; ++i)</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> {</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> buffer[i] = val;</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> }</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> }</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> </div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keyword">template</span><<span class="keywordtype">size_t</span> N></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">using </span>RampArray = std::array<ControlRamp, N>;</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span>};</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> </div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"><a class="line" href="class_control_ramp_processor.html"> 78</a></span><span class="keyword">class </span><a class="code hl_class" href="class_control_ramp_processor.html">ControlRampProcessor</a></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span>{</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keyword">template</span><<span class="keywordtype">size_t</span> N></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keyword">using </span>RampArray = ControlRamp::RampArray<N>;</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> </div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">template</span><<span class="keywordtype">size_t</span> N></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="keyword">using </span>ProcessorArray = std::array<ControlRampProcessor, N>;</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> </div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> <a class="code hl_class" href="class_control_ramp_processor.html">ControlRampProcessor</a>(<a class="code hl_struct" href="struct_control_ramp.html">ControlRamp</a>& output) : mpOutput(output) {}</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <a class="code hl_class" href="class_control_ramp_processor.html">ControlRampProcessor</a>(<span class="keyword">const</span> <a class="code hl_class" href="class_control_ramp_processor.html">ControlRampProcessor</a>&) = <span class="keyword">delete</span>;</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> <a class="code hl_class" href="class_control_ramp_processor.html">ControlRampProcessor</a>& operator=(<span class="keyword">const</span> <a class="code hl_class" href="class_control_ramp_processor.html">ControlRampProcessor</a>&) = <span class="keyword">delete</span>;</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> <a class="code hl_class" href="class_control_ramp_processor.html">ControlRampProcessor</a>(<a class="code hl_class" href="class_control_ramp_processor.html">ControlRampProcessor</a>&&) = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> <a class="code hl_class" href="class_control_ramp_processor.html">ControlRampProcessor</a>& operator=(<a class="code hl_class" href="class_control_ramp_processor.html">ControlRampProcessor</a>&&) = <span class="keyword">delete</span>;</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> </div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> <span class="comment">// process the glide and write changes to the output ramp.</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> <span class="keywordtype">void</span> Process(<span class="keywordtype">int</span> blockSize)</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> {</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> <span class="comment">// always connect with previous block</span></div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> mpOutput.startValue = mpOutput.endValue;</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> <span class="keywordflow">if</span>(mSamplesRemaining)</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> {</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keywordflow">if</span>(mSamplesRemaining == mGlideSamples)</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> {</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="comment">// start glide</span></div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <span class="keywordflow">if</span>(mSamplesRemaining > blockSize)</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> {</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="comment">// start with ramp to block end</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> <span class="keywordtype">int</span> glideStartSamples = blockSize - mStartOffset;</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> mpOutput.endValue = mpOutput.startValue + glideStartSamples*mChangePerSample;</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> mpOutput.transitionStart = mStartOffset;</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> mpOutput.transitionEnd = blockSize;</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> mSamplesRemaining -= glideStartSamples;</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> }</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> {</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> <span class="comment">// glide starts and finishes within block</span></div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> mpOutput.endValue = mTargetValue;</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> mpOutput.transitionStart = mStartOffset;</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> mpOutput.transitionEnd = mStartOffset + mGlideSamples;</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> mSamplesRemaining = 0;</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> }</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> }</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span>(mSamplesRemaining > blockSize)</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> {</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> <span class="comment">// continue glide</span></div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> mpOutput.endValue = mpOutput.startValue + mChangePerSample*blockSize;</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> mpOutput.transitionStart = 0;</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> mpOutput.transitionEnd = blockSize;</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> mSamplesRemaining -= blockSize;</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> }</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> {</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> <span class="comment">// finish glide</span></div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> mpOutput.endValue = mTargetValue;</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> mpOutput.transitionStart = 0;</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> mpOutput.transitionEnd = mSamplesRemaining;</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> mSamplesRemaining = 0;</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> }</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> }</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> }</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> </div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> <span class="comment">// set the next target for the glide without writing directly to the ramp.</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="keywordtype">void</span> SetTarget(<span class="keywordtype">double</span> targetValue, <span class="keywordtype">int</span> startOffset, <span class="keywordtype">int</span> glideSamples, <span class="keywordtype">int</span> blockSize)</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> {</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> mTargetValue = targetValue;</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> <span class="keywordflow">if</span>(glideSamples < 1) glideSamples = 1;</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> mGlideSamples = glideSamples;</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> mSamplesRemaining = glideSamples;</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> mChangePerSample = (targetValue - mpOutput.endValue)/glideSamples;</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> mStartOffset = startOffset;</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> }</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> </div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <span class="comment">// create an array of processors for an array of ramps</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> <span class="keyword">template</span><<span class="keywordtype">size_t</span> N></div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="keyword">static</span> ProcessorArray<N>* Create(RampArray<N>& inputs)</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> {</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> <span class="keywordflow">return</span> CreateImpl<N>(inputs, std::make_index_sequence<N>());</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> }</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> </div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> </div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> <span class="keyword">template</span><<span class="keywordtype">size_t</span> N, <span class="keywordtype">size_t</span> ...Is></div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> <span class="keyword">static</span> ProcessorArray<N>* CreateImpl(RampArray<N>& inputs, std::index_sequence<Is...>)</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> {</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> <span class="keywordflow">return</span> <span class="keyword">new</span> ProcessorArray<N>{std::ref(inputs[Is]).get()...};</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> }</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> </div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <a class="code hl_struct" href="struct_control_ramp.html">ControlRamp</a>& mpOutput;</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <span class="keywordtype">double</span> mTargetValue {0.};</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> <span class="keywordtype">double</span> mChangePerSample {0.};</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> <span class="keywordtype">int</span> mGlideSamples {0};</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> <span class="keywordtype">int</span> mSamplesRemaining {0};</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> <span class="keywordtype">int</span> mStartOffset {0};</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span>};</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> </div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span>END_IPLUG_NAMESPACE</div>
<div class="ttc" id="aclass_control_ramp_processor_html"><div class="ttname"><a href="class_control_ramp_processor.html">ControlRampProcessor</a></div><div class="ttdef"><b>Definition:</b> <a href="_control_ramp_8h_source.html#l00078">ControlRamp.h:79</a></div></div>
<div class="ttc" id="astruct_control_ramp_html"><div class="ttname"><a href="struct_control_ramp.html">ControlRamp</a></div><div class="ttdoc">A ControlRamp describes one value changing over time.</div><div class="ttdef"><b>Definition:</b> <a href="_control_ramp_8h_source.html#l00032">ControlRamp.h:33</a></div></div>
<div class="ttc" id="astruct_control_ramp_html_afe7409f59d08cca0f0f84da969697481"><div class="ttname"><a href="struct_control_ramp.html#afe7409f59d08cca0f0f84da969697481">ControlRamp::Write</a></div><div class="ttdeci">void Write(float *buffer, int startIdx, int nFrames)</div><div class="ttdoc">Writes the ramp signal to an output buffer.</div><div class="ttdef"><b>Definition:</b> <a href="_control_ramp_8h_source.html#l00054">ControlRamp.h:54</a></div></div>
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