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  69. <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * DISTRHO Plugin Framework (DPF)</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright (C) 2012-2019 Filipe Coelho &lt;falktx@falktx.com&gt;</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * Permission to use, copy, modify, and/or distribute this software for any purpose with</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * or without fee is hereby granted, provided that the above copyright notice and this</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * permission notice appear in all copies.</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> * THE SOFTWARE IS PROVIDED &quot;AS IS&quot; AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> * TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#ifdef DOXYGEN</span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#include &quot;src/DistrhoDefines.h&quot;</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;START_NAMESPACE_DISTRHO</div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment">/* ------------------------------------------------------------------------------------------------------------</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment"> * Intro */</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment">   @mainpage DISTRHO %Plugin Framework</span></div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment">   DISTRHO %Plugin Framework (or @b DPF for short)</span></div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment">   is a plugin framework designed to make development of new plugins an easy and enjoyable task.@n</span></div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment">   It allows developers to create plugins with custom UIs using a simple C++ API.@n</span></div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="comment">   The framework facilitates exporting various different plugin formats from the same code-base.</span></div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment">   DPF can build for LADSPA, DSSI, LV2 and VST2 formats.@n</span></div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment">   A JACK/Standalone mode is also available, allowing you to quickly test plugins.</span></div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="comment">   @section Macros</span></div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="comment">   You start by creating a &quot;DistrhoPluginInfo.h&quot; file describing the plugin via macros, see @ref PluginMacros.@n</span></div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="comment">   This file is included in the main DPF code to select which features to activate for each plugin format.</span></div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="comment">   For example, a plugin (with %UI) that use states will require LV2 hosts to support Atom and Worker extensions for</span></div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment">   message passing from the %UI to the plugin.@n</span></div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="comment">   If your plugin does not make use of states, the Worker extension is not set as a required feature.</span></div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="comment">   @section Plugin</span></div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="comment">   The next step is to create your plugin code by subclassing DPF&#39;s Plugin class.@n</span></div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="comment">   You need to pass the number of parameters in the constructor and also the number of programs and states, if any.</span></div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="comment">   Here&#39;s an example of an audio plugin that simply mutes the host output:</span></div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="comment">   @code</span></div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="comment">   class MutePlugin : public Plugin</span></div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="comment">   {</span></div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="comment">   public:</span><span class="comment"></span></div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="comment">        Plugin class constructor.</span></div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;      MutePlugin()</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;          : Plugin(0, 0, 0) // 0 parameters, 0 programs and 0 states</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;      {</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;      }</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;   protected:</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;      * Information */</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="comment">        Get the plugin label.</span></div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="comment">        This label is a short restricted name consisting of only _, a-z, A-Z and 0-9 characters.</span></div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;      const char* getLabel() const override</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;      {</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;          return &quot;Mute&quot;;</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;      }</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;<span class="comment">        Get the plugin author/maker.</span></div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;      const char* getMaker() const override</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;      {</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;          return &quot;DPF&quot;;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;      }</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="comment">        Get the plugin license name (a single line of text).</span></div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="comment">        For commercial plugins this should return some short copyright information.</span></div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;      const char* getLicense() const override</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;      {</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;          return &quot;MIT&quot;;</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;      }</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="comment">        Get the plugin version, in hexadecimal.</span></div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;      uint32_t getVersion() const override</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;      {</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;          return d_version(1, 0, 0);</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;      }</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;<span class="comment">        Get the plugin unique Id.</span></div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;<span class="comment">        This value is used by LADSPA, DSSI and VST plugin formats.</span></div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;      int64_t getUniqueId() const override</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;      {</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;          return d_cconst(&#39;M&#39;, &#39;u&#39;, &#39;t&#39;, &#39;e&#39;);</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;      }</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;      * This example has no parameters, so skip parameter stuff */</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;      void  initParameter(uint32_t, Parameter&amp;) override {}</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;      float getParameterValue(uint32_t) const   override { return 0.0f; }</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;      void  setParameterValue(uint32_t, float)  override {}</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;      * Audio/MIDI Processing */</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;<span class="comment">        Run/process function for plugins without MIDI input.</span></div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;<span class="comment">        NOTE: Some parameters might be null if there are no audio inputs or outputs.</span></div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;      void run(const float**, float** outputs, uint32_t frames) override</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;      {</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;          // get the left and right audio outputs</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;          float* const outL = outputs[0];</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;          float* const outR = outputs[1];</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;          // mute audio</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;          std::memset(outL, 0, sizeof(float)*frames);</div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;          std::memset(outR, 0, sizeof(float)*frames);</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;      }</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;   };</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;   @endcode</div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;   See the Plugin class for more information and to understand what each function does.</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;   @section Parameters</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;   A plugin is nothing without parameters.@n</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;   In DPF parameters can be inputs or outputs.@n</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;   They have hints to describe how they behave plus a name and a symbol identifying them.@n</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;   Parameters also have &#39;ranges&#39; – a minimum, maximum and default value.</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;   Input parameters are &quot;read-only&quot;: the plugin can read them but not change them.</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;   (the exception being when changing programs, more on that below)@n</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;   It&#39;s the host responsibility to save, restore and set input parameters.</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;   Output parameters can be changed at anytime by the plugin.@n</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;   The host will simply read their values and not change them.</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;   Here&#39;s an example of an audio plugin that has 1 input parameter:</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;   @code</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;   class GainPlugin : public Plugin</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;   {</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;   public:<span class="comment"></span></div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;<span class="comment">        Plugin class constructor.</span></div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;<span class="comment">        You must set all parameter values to their defaults, matching ParameterRanges::def.</span></div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;      GainPlugin()</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;          : Plugin(1, 0, 0), // 1 parameter, 0 programs and 0 states</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;            fGain(1.0f)</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;      {</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;      }</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;   protected:</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;      * Information */</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;      const char* getLabel() const override</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;      {</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;          return &quot;Gain&quot;;</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;      }</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;      const char* getMaker() const override</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;      {</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;          return &quot;DPF&quot;;</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;      }</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;      const char* getLicense() const override</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;      {</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;          return &quot;MIT&quot;;</div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;      }</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;      uint32_t getVersion() const override</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;      {</div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;          return d_version(1, 0, 0);</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;      }</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;      int64_t getUniqueId() const override</div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;      {</div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;          return d_cconst(&#39;G&#39;, &#39;a&#39;, &#39;i&#39;, &#39;n&#39;);</div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;      }</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;      * Init */</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;<span class="comment">        Initialize a parameter.</span></div><div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;<span class="comment">        This function will be called once, shortly after the plugin is created.</span></div><div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;      void initParameter(uint32_t index, Parameter&amp; parameter) override</div><div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;      {</div><div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;          // we only have one parameter so we can skip checking the index</div><div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;</div><div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;          parameter.hints      = kParameterIsAutomable;</div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;          parameter.name       = &quot;Gain&quot;;</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;          parameter.symbol     = &quot;gain&quot;;</div><div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;          parameter.ranges.min = 0.0f;</div><div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;          parameter.ranges.max = 2.0f;</div><div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;          parameter.ranges.def = 1.0f;</div><div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;      }</div><div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;</div><div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;      * Internal data */</div><div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;<span class="comment">        Get the current value of a parameter.</span></div><div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;      float getParameterValue(uint32_t index) const override</div><div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;      {</div><div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;          // same as before, ignore index check</div><div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;</div><div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;          return fGain;</div><div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;      }</div><div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;<span class="comment">        Change a parameter value.</span></div><div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;      void setParameterValue(uint32_t index, float value) override</div><div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;      {</div><div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;          // same as before, ignore index check</div><div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;</div><div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;          fGain = value;</div><div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;      }</div><div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;</div><div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;      * Audio/MIDI Processing */</div><div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;</div><div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;      void run(const float**, float** outputs, uint32_t frames) override</div><div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;      {</div><div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;          // get the mono input and output</div><div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;          const float* const in  = inputs[0];</div><div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;          /* */ float* const out = outputs[0];</div><div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;</div><div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;          // apply gain against all samples</div><div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;          for (uint32_t i=0; i &lt; frames; ++i)</div><div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;              out[i] = in[i] * fGain;</div><div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;      }</div><div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;</div><div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;   private:</div><div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;      float fGain;</div><div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;   };</div><div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;   @endcode</div><div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;</div><div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;   See the Parameter struct for more information about parameters.</div><div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;</div><div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;   @section Programs</div><div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;   Programs in DPF refer to plugin-side presets (usually called &quot;factory presets&quot;),</div><div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;   an initial set of presets provided by plugin authors included in the actual plugin.</div><div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;</div><div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;   To use programs you must first enable them by setting @ref DISTRHO_PLUGIN_WANT_PROGRAMS to 1 in your DistrhoPluginInfo.h file.@n</div><div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;   When enabled you&#39;ll need to override 2 new function in your plugin code,</div><div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;   Plugin::initProgramName(uint32_t, String&amp;) and Plugin::loadProgram(uint32_t).</div><div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;</div><div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;   Here&#39;s an example of a plugin with a &quot;default&quot; program:</div><div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;   @code</div><div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;   class PluginWithPresets : public Plugin</div><div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;   {</div><div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;   public:</div><div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;      PluginWithPresets()</div><div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;          : Plugin(2, 1, 0), // 2 parameters, 1 program and 0 states</div><div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;            fGainL(1.0f),</div><div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;            fGainR(1.0f),</div><div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;      {</div><div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;      }</div><div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;</div><div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;   protected:</div><div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;      * Information */</div><div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;</div><div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;      const char* getLabel() const override</div><div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;      {</div><div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;          return &quot;Prog&quot;;</div><div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;      }</div><div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;</div><div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;      const char* getMaker() const override</div><div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;      {</div><div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;          return &quot;DPF&quot;;</div><div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;      }</div><div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;</div><div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;      const char* getLicense() const override</div><div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;      {</div><div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;          return &quot;MIT&quot;;</div><div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;      }</div><div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;</div><div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;      uint32_t getVersion() const override</div><div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;      {</div><div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;          return d_version(1, 0, 0);</div><div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;      }</div><div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;</div><div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;      int64_t getUniqueId() const override</div><div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;      {</div><div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;          return d_cconst(&#39;P&#39;, &#39;r&#39;, &#39;o&#39;, &#39;g&#39;);</div><div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;      }</div><div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;</div><div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;      * Init */</div><div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;<span class="comment">        Initialize a parameter.</span></div><div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;<span class="comment">        This function will be called once, shortly after the plugin is created.</span></div><div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;      void initParameter(uint32_t index, Parameter&amp; parameter) override</div><div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;      {</div><div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;          parameter.hints      = kParameterIsAutomable;</div><div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;          parameter.ranges.min = 0.0f;</div><div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;          parameter.ranges.max = 2.0f;</div><div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;          parameter.ranges.def = 1.0f;</div><div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;</div><div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;          switch (index)</div><div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;          {</div><div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;          case 0;</div><div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;              parameter.name   = &quot;Gain Right&quot;;</div><div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;              parameter.symbol = &quot;gainR&quot;;</div><div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;              break;</div><div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;          case 1;</div><div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;              parameter.name   = &quot;Gain Left&quot;;</div><div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;              parameter.symbol = &quot;gainL&quot;;</div><div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;              break;</div><div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;          }</div><div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;      }</div><div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;<span class="comment">      /**</span></div><div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;<span class="comment">          Set the name of the program @a index.</span></div><div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;<span class="comment">          This function will be called once, shortly after the plugin is created.</span></div><div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;<span class="comment">        */</span></div><div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;      void initProgramName(uint32_t index, String&amp; programName)</div><div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;      {</div><div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;          switch(index)</div><div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;          {</div><div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;          case 0:</div><div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;              programName = &quot;Default&quot;;</div><div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;              break;</div><div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;          }</div><div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;      }</div><div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;</div><div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;      * Internal data */</div><div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;<span class="comment">        Get the current value of a parameter.</span></div><div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;      float getParameterValue(uint32_t index) const override</div><div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;      {</div><div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;          switch (index)</div><div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;          {</div><div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;          case 0;</div><div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;              return fGainL;</div><div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;          case 1;</div><div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;              return fGainR;</div><div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;          }</div><div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;      }</div><div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;<span class="comment">        Change a parameter value.</span></div><div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;      void setParameterValue(uint32_t index, float value) override</div><div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;      {</div><div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;          switch (index)</div><div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;          {</div><div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;          case 0;</div><div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;              fGainL = value;</div><div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;              break;</div><div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;          case 1;</div><div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;              fGainR = value;</div><div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;              break;</div><div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;          }</div><div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;      }</div><div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;<span class="comment">     /**</span></div><div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;<span class="comment">        Load a program.</span></div><div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;      void loadProgram(uint32_t index)</div><div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;      {</div><div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;          switch(index)</div><div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;          {</div><div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;          case 0:</div><div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;              fGainL = 1.0f;</div><div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;              fGainR = 1.0f;</div><div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;              break;</div><div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;          }</div><div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;      }</div><div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;</div><div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;     /* ----------------------------------------------------------------------------------------</div><div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;      * Audio/MIDI Processing */</div><div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;</div><div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;      void run(const float**, float** outputs, uint32_t frames) override</div><div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;      {</div><div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;          // get the left and right audio buffers</div><div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;          const float* const inL  = inputs[0];</div><div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;          const float* const inR  = inputs[0];</div><div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;          /* */ float* const outL = outputs[0];</div><div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;          /* */ float* const outR = outputs[0];</div><div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;</div><div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;          // apply gain against all samples</div><div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;          for (uint32_t i=0; i &lt; frames; ++i)</div><div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;          {</div><div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;              outL[i] = inL[i] * fGainL;</div><div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;              outR[i] = inR[i] * fGainR;</div><div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;          }</div><div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;      }</div><div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;</div><div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;   private:</div><div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;      float fGainL, fGainR;</div><div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;   };</div><div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;   @endcode</div><div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;</div><div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;   @section States</div><div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;   describe them</div><div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;</div><div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;   @section MIDI</div><div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;   describe them</div><div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;</div><div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;   @section Latency</div><div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;   describe it</div><div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;</div><div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;   @section Time-Position</div><div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;   describe it</div><div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;</div><div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;   @section UI</div><div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;   describe them</div><div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;*/</div><div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;</div><div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;/* ------------------------------------------------------------------------------------------------------------</div><div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160; * Plugin Macros */</div><div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;<span class="comment">   @defgroup PluginMacros Plugin Macros</span></div><div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;<span class="comment">   C Macros that describe your plugin. (defined in the &quot;DistrhoPluginInfo.h&quot; file)</span></div><div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;<span class="comment">   With these macros you can tell the host what features your plugin requires.@n</span></div><div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;<span class="comment">   Depending on which macros you enable, new functions will be available to call and/or override.</span></div><div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;<span class="comment">   All values are either integer or strings.@n</span></div><div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;<span class="comment">   For boolean-like values 1 means &#39;on&#39; and 0 means &#39;off&#39;.</span></div><div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;<span class="comment">   The values defined in this group are for documentation purposes only.@n</span></div><div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;<span class="comment">   All macros are disabled by default.</span></div><div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;<span class="comment">   Only 4 macros are required, they are:</span></div><div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;<span class="comment">    - @ref DISTRHO_PLUGIN_NAME</span></div><div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;<span class="comment">    - @ref DISTRHO_PLUGIN_NUM_INPUTS</span></div><div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;<span class="comment">    - @ref DISTRHO_PLUGIN_NUM_OUTPUTS</span></div><div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;<span class="comment">    - @ref DISTRHO_PLUGIN_URI</span></div><div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;<span class="comment">   @{</span></div><div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;<span class="comment">   The plugin name.@n</span></div><div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;<span class="comment">   This is used to identify your plugin before a Plugin instance can be created.</span></div><div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;<span class="comment">   @note This macro is required.</span></div><div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00466"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#ga888482a9f695c2ca2f433e5f3172dcc4">  466</a></span>&#160;#define DISTRHO_PLUGIN_NAME &quot;Plugin Name&quot;</div><div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;<span class="comment">   Number of audio inputs the plugin has.</span></div><div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;<span class="comment">   @note This macro is required.</span></div><div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00472"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#ga5f4f3d9a5dc3c23882d158e636319998">  472</a></span>&#160;#define DISTRHO_PLUGIN_NUM_INPUTS 2</div><div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;<span class="comment">   Number of audio outputs the plugin has.</span></div><div class="line"><a name="l00476"></a><span class="lineno">  476</span>&#160;<span class="comment">   @note This macro is required.</span></div><div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00478"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#ga917195804ebcb2bb48c9fad52b20b3ca">  478</a></span>&#160;#define DISTRHO_PLUGIN_NUM_OUTPUTS 2</div><div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;<span class="comment">   The plugin URI when exporting in LV2 format.</span></div><div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;<span class="comment">   @note This macro is required.</span></div><div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00484"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#ga9cc186448134e6a1956474b3878c97a8">  484</a></span>&#160;#define DISTRHO_PLUGIN_URI &quot;urn:distrho:name&quot;</div><div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;<span class="comment">   Wherever the plugin has a custom %UI.</span></div><div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;<span class="comment">   @see DISTRHO_UI_USE_NANOVG</span></div><div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;<span class="comment">   @see UI</span></div><div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00491"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#gacf8a1af679c09637ba0bdc5f4f8e37dd">  491</a></span>&#160;#define DISTRHO_PLUGIN_HAS_UI 1</div><div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;<span class="comment">   Wherever the plugin processing is realtime-safe.@n</span></div><div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;<span class="comment">   TODO - list rtsafe requirements</span></div><div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00497"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#ga82546dd199fcea338b113f2f6da84ced">  497</a></span>&#160;#define DISTRHO_PLUGIN_IS_RT_SAFE 1</div><div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;<span class="comment">   Wherever the plugin is a synth.@n</span></div><div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;<span class="comment">   @ref DISTRHO_PLUGIN_WANT_MIDI_INPUT is automatically enabled when this is too.</span></div><div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;<span class="comment">   @see DISTRHO_PLUGIN_WANT_MIDI_INPUT</span></div><div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00504"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#ga854bde6b6fdb0d47182149dbab0fed72">  504</a></span>&#160;#define DISTRHO_PLUGIN_IS_SYNTH 1</div><div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;<span class="comment">   Enable direct access between the %UI and plugin code.</span></div><div class="line"><a name="l00508"></a><span class="lineno">  508</span>&#160;<span class="comment">   @see UI::getPluginInstancePointer()</span></div><div class="line"><a name="l00509"></a><span class="lineno">  509</span>&#160;<span class="comment">   @note DO NOT USE THIS UNLESS STRICTLY NECESSARY!!</span></div><div class="line"><a name="l00510"></a><span class="lineno">  510</span>&#160;<span class="comment">         Try to avoid it at all costs!</span></div><div class="line"><a name="l00511"></a><span class="lineno">  511</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00512"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#gac6873a3950f52f3fde8e386af63b69a1">  512</a></span>&#160;#define DISTRHO_PLUGIN_WANT_DIRECT_ACCESS 0</div><div class="line"><a name="l00513"></a><span class="lineno">  513</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;<span class="comment">   Wherever the plugin introduces latency during audio or midi processing.</span></div><div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;<span class="comment">   @see Plugin::setLatency(uint32_t)</span></div><div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00518"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#gad6b0ebf10e048f4742f29735da4d4930">  518</a></span>&#160;#define DISTRHO_PLUGIN_WANT_LATENCY 1</div><div class="line"><a name="l00519"></a><span class="lineno">  519</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00520"></a><span class="lineno">  520</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00521"></a><span class="lineno">  521</span>&#160;<span class="comment">   Wherever the plugin wants MIDI input.@n</span></div><div class="line"><a name="l00522"></a><span class="lineno">  522</span>&#160;<span class="comment">   This is automatically enabled if @ref DISTRHO_PLUGIN_IS_SYNTH is true.</span></div><div class="line"><a name="l00523"></a><span class="lineno">  523</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00524"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#gadf2e2eb7550e4116001c816adfb04a70">  524</a></span>&#160;#define DISTRHO_PLUGIN_WANT_MIDI_INPUT 1</div><div class="line"><a name="l00525"></a><span class="lineno">  525</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00526"></a><span class="lineno">  526</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00527"></a><span class="lineno">  527</span>&#160;<span class="comment">   Wherever the plugin wants MIDI output.</span></div><div class="line"><a name="l00528"></a><span class="lineno">  528</span>&#160;<span class="comment">   @see Plugin::writeMidiEvent(const MidiEvent&amp;)</span></div><div class="line"><a name="l00529"></a><span class="lineno">  529</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00530"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#ga548522eb91344a45841a5a95ff4f8073">  530</a></span>&#160;#define DISTRHO_PLUGIN_WANT_MIDI_OUTPUT 1</div><div class="line"><a name="l00531"></a><span class="lineno">  531</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00532"></a><span class="lineno">  532</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00533"></a><span class="lineno">  533</span>&#160;<span class="comment">   Wherever the plugin provides its own internal programs.</span></div><div class="line"><a name="l00534"></a><span class="lineno">  534</span>&#160;<span class="comment">   @see Plugin::initProgramName(uint32_t, String&amp;)</span></div><div class="line"><a name="l00535"></a><span class="lineno">  535</span>&#160;<span class="comment">   @see Plugin::loadProgram(uint32_t)</span></div><div class="line"><a name="l00536"></a><span class="lineno">  536</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00537"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#gad95e24b17f196260cee15255fdb5b677">  537</a></span>&#160;#define DISTRHO_PLUGIN_WANT_PROGRAMS 1</div><div class="line"><a name="l00538"></a><span class="lineno">  538</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00539"></a><span class="lineno">  539</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00540"></a><span class="lineno">  540</span>&#160;<span class="comment">   Wherever the plugin uses internal non-parameter data.</span></div><div class="line"><a name="l00541"></a><span class="lineno">  541</span>&#160;<span class="comment">   @see Plugin::initState(uint32_t, String&amp;, String&amp;)</span></div><div class="line"><a name="l00542"></a><span class="lineno">  542</span>&#160;<span class="comment">   @see Plugin::setState(const char*, const char*)</span></div><div class="line"><a name="l00543"></a><span class="lineno">  543</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00544"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#ga255f43cc0997af8b56abcca260c875e0">  544</a></span>&#160;#define DISTRHO_PLUGIN_WANT_STATE 1</div><div class="line"><a name="l00545"></a><span class="lineno">  545</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00546"></a><span class="lineno">  546</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00547"></a><span class="lineno">  547</span>&#160;<span class="comment">   Wherever the plugin implements the full state API.</span></div><div class="line"><a name="l00548"></a><span class="lineno">  548</span>&#160;<span class="comment">   When this macro is enabled, the plugin must implement a new getState(const char* key) function, which the host calls when saving its session/project.</span></div><div class="line"><a name="l00549"></a><span class="lineno">  549</span>&#160;<span class="comment">   This is useful for plugins that have custom internal values not exposed to the host as key-value state pairs or parameters.</span></div><div class="line"><a name="l00550"></a><span class="lineno">  550</span>&#160;<span class="comment">   Most simple effects and synths will not need this.</span></div><div class="line"><a name="l00551"></a><span class="lineno">  551</span>&#160;<span class="comment">   @note this macro is automatically enabled if a plugin has programs and state, as the key-value state pairs need to be updated when the current program changes.</span></div><div class="line"><a name="l00552"></a><span class="lineno">  552</span>&#160;<span class="comment">   @see Plugin::getState(const char*)</span></div><div class="line"><a name="l00553"></a><span class="lineno">  553</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00554"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#gac022d3d0a8782d632d7a801bc9cf721e">  554</a></span>&#160;#define DISTRHO_PLUGIN_WANT_FULL_STATE 1</div><div class="line"><a name="l00555"></a><span class="lineno">  555</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00556"></a><span class="lineno">  556</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00557"></a><span class="lineno">  557</span>&#160;<span class="comment">   Wherever the plugin wants time position information from the host.</span></div><div class="line"><a name="l00558"></a><span class="lineno">  558</span>&#160;<span class="comment">   @see Plugin::getTimePosition()</span></div><div class="line"><a name="l00559"></a><span class="lineno">  559</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00560"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#ga496610b956d931b1940d07da48d123f2">  560</a></span>&#160;#define DISTRHO_PLUGIN_WANT_TIMEPOS 1</div><div class="line"><a name="l00561"></a><span class="lineno">  561</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00562"></a><span class="lineno">  562</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00563"></a><span class="lineno">  563</span>&#160;<span class="comment">   Wherever the %UI uses NanoVG for drawing instead of the default raw OpenGL calls.@n</span></div><div class="line"><a name="l00564"></a><span class="lineno">  564</span>&#160;<span class="comment">   When enabled your %UI instance will subclass @ref NanoWidget instead of @ref Widget.</span></div><div class="line"><a name="l00565"></a><span class="lineno">  565</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00566"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#gad49e79936a2aa5afa089cbc051426ccd">  566</a></span>&#160;#define DISTRHO_UI_USE_NANOVG 1</div><div class="line"><a name="l00567"></a><span class="lineno">  567</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00568"></a><span class="lineno">  568</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00569"></a><span class="lineno">  569</span>&#160;<span class="comment">   Wherever the %UI is resizable to any size by the user.@n</span></div><div class="line"><a name="l00570"></a><span class="lineno">  570</span>&#160;<span class="comment">   By default this is false, and resizing is only allowed under the plugin UI control,@n</span></div><div class="line"><a name="l00571"></a><span class="lineno">  571</span>&#160;<span class="comment">   Enabling this options makes it possible for the user to resize the plugin UI at anytime.</span></div><div class="line"><a name="l00572"></a><span class="lineno">  572</span>&#160;<span class="comment">   @see UI::setGeometryConstraints(uint, uint, bool, bool)</span></div><div class="line"><a name="l00573"></a><span class="lineno">  573</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00574"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#gabadb9d9ba7f479df39b3963ee60b7a4b">  574</a></span>&#160;#define DISTRHO_UI_USER_RESIZABLE 1</div><div class="line"><a name="l00575"></a><span class="lineno">  575</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00576"></a><span class="lineno">  576</span>&#160;<span class="comment">/**</span></div><div class="line"><a name="l00577"></a><span class="lineno">  577</span>&#160;<span class="comment">   The %UI URI when exporting in LV2 format.@n</span></div><div class="line"><a name="l00578"></a><span class="lineno">  578</span>&#160;<span class="comment">   By default this is set to @ref DISTRHO_PLUGIN_URI with &quot;#UI&quot; as suffix.</span></div><div class="line"><a name="l00579"></a><span class="lineno">  579</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00580"></a><span class="lineno"><a class="line" href="group__PluginMacros.html#ga420a88022da249b9f38a6046998dbd7c">  580</a></span>&#160;#define DISTRHO_UI_URI DISTRHO_PLUGIN_URI &quot;#UI&quot;</div><div class="line"><a name="l00581"></a><span class="lineno">  581</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00582"></a><span class="lineno">  582</span>&#160;<span class="comment">/** @} */</span></div><div class="line"><a name="l00583"></a><span class="lineno">  583</span>&#160;</div><div class="line"><a name="l00584"></a><span class="lineno">  584</span>&#160;// -----------------------------------------------------------------------------------------------------------</div><div class="line"><a name="l00585"></a><span class="lineno">  585</span>&#160;</div><div class="line"><a name="l00586"></a><span class="lineno">  586</span>&#160;END_NAMESPACE_DISTRHO</div><div class="line"><a name="l00587"></a><span class="lineno">  587</span>&#160;</div><div class="line"><a name="l00588"></a><span class="lineno">  588</span>&#160;#endif // DOXYGEN</div></div><!-- fragment --></div><!-- contents -->

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