DISTRHO Plugin Framework
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  8. <title>DISTRHO Plugin Framework: AudioMidiSyncHelper Class Reference</title>
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  61. <div class="header">
  62. <div class="summary">
  63. <a href="#pub-methods">Public Member Functions</a> &#124;
  64. <a href="#pub-attribs">Public Attributes</a> &#124;
  65. <a href="classAudioMidiSyncHelper-members.html">List of all members</a> </div>
  66. <div class="headertitle">
  67. <div class="title">AudioMidiSyncHelper Class Reference</div> </div>
  68. </div><!--header-->
  69. <div class="contents">
  70. <p><code>#include &lt;<a class="el" href="DistrhoPluginUtils_8hpp_source.html">DistrhoPluginUtils.hpp</a>&gt;</code></p>
  71. <table class="memberdecls">
  72. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
  73. Public Member Functions</h2></td></tr>
  74. <tr class="memitem:ae75a1d7256c04445ec77176b6505fcb0"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classAudioMidiSyncHelper.html#ae75a1d7256c04445ec77176b6505fcb0">AudioMidiSyncHelper</a> (float **const o, uint32_t f, const <a class="el" href="structMidiEvent.html">MidiEvent</a> *m, uint32_t mc)</td></tr>
  75. <tr class="separator:ae75a1d7256c04445ec77176b6505fcb0"><td class="memSeparator" colspan="2">&#160;</td></tr>
  76. <tr class="memitem:a43f354c1520893449d81a27b3e7a81fe"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classAudioMidiSyncHelper.html#a43f354c1520893449d81a27b3e7a81fe">nextEvent</a> ()</td></tr>
  77. <tr class="separator:a43f354c1520893449d81a27b3e7a81fe"><td class="memSeparator" colspan="2">&#160;</td></tr>
  78. </table><table class="memberdecls">
  79. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-attribs"></a>
  80. Public Attributes</h2></td></tr>
  81. <tr class="memitem:a7b54cae0fdaae3d23aaccf2dbb9344ef"><td class="memItemLeft" align="right" valign="top">float *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classAudioMidiSyncHelper.html#a7b54cae0fdaae3d23aaccf2dbb9344ef">outputs</a> [2]</td></tr>
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  84. uint32_t&#160;</td><td class="memItemRight" valign="bottom"><b>frames</b></td></tr>
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  87. const <a class="el" href="structMidiEvent.html">MidiEvent</a> *&#160;</td><td class="memItemRight" valign="bottom"><b>midiEvents</b></td></tr>
  88. <tr class="separator:ad0a4a51fd808712d5a2b3b1b9ae893b7"><td class="memSeparator" colspan="2">&#160;</td></tr>
  89. <tr class="memitem:a8483428a37a7e8aa4573289bddaed6d8"><td class="memItemLeft" align="right" valign="top"><a id="a8483428a37a7e8aa4573289bddaed6d8"></a>
  90. uint32_t&#160;</td><td class="memItemRight" valign="bottom"><b>midiEventCount</b></td></tr>
  91. <tr class="separator:a8483428a37a7e8aa4573289bddaed6d8"><td class="memSeparator" colspan="2">&#160;</td></tr>
  92. </table>
  93. <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
  94. <div class="textblock"><p>Handy class to help keep audio buffer in sync with incoming MIDI events. To use it, create a local variable (on the stack) and call <a class="el" href="classAudioMidiSyncHelper.html#a43f354c1520893449d81a27b3e7a81fe">nextEvent()</a> until it returns false. </p><div class="fragment"><div class="line"><span class="keywordflow">for</span> (<a class="code" href="classAudioMidiSyncHelper.html">AudioMidiSyncHelper</a> amsh(<a class="code" href="classAudioMidiSyncHelper.html#a7b54cae0fdaae3d23aaccf2dbb9344ef">outputs</a>, frames, midiEvents, midiEventCount); amsh.<a class="code" href="classAudioMidiSyncHelper.html#a43f354c1520893449d81a27b3e7a81fe">nextEvent</a>();)</div>
  95. <div class="line">{</div>
  96. <div class="line"> <span class="keywordtype">float</span>* <span class="keyword">const</span> outL = amsh.outputs[0];</div>
  97. <div class="line"> <span class="keywordtype">float</span>* <span class="keyword">const</span> outR = amsh.outputs[1];</div>
  98. <div class="line"> </div>
  99. <div class="line"> <span class="keywordflow">for</span> (uint32_t i=0; i&lt;amsh.midiEventCount; ++i)</div>
  100. <div class="line"> {</div>
  101. <div class="line"> <span class="keyword">const</span> <a class="code" href="structMidiEvent.html">MidiEvent</a>&amp; ev(amsh.midiEvents[i]);</div>
  102. <div class="line"> <span class="comment">// ... do something with the midi event</span></div>
  103. <div class="line"> }</div>
  104. <div class="line"> </div>
  105. <div class="line"> renderSynth(outL, outR, amsh.frames);</div>
  106. <div class="line">}</div>
  107. </div><!-- fragment --><p>Some important notes when using this class:</p><ol type="1">
  108. <li><a class="el" href="structMidiEvent.html#aca2f6590b33bd2175ab71f985747d88e">MidiEvent::frame</a> retains its original value, but it is useless, do not use it.</li>
  109. <li>The class variables names are be the same as the default ones in the run function. Keep that in mind and try to avoid typos. :) </li>
  110. </ol>
  111. </div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
  112. <a id="ae75a1d7256c04445ec77176b6505fcb0"></a>
  113. <h2 class="memtitle"><span class="permalink"><a href="#ae75a1d7256c04445ec77176b6505fcb0">&#9670;&nbsp;</a></span>AudioMidiSyncHelper()</h2>
  114. <div class="memitem">
  115. <div class="memproto">
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  118. <td class="mlabels-left">
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  121. <td class="memname">AudioMidiSyncHelper::AudioMidiSyncHelper </td>
  122. <td>(</td>
  123. <td class="paramtype">float **const&#160;</td>
  124. <td class="paramname"><em>o</em>, </td>
  125. </tr>
  126. <tr>
  127. <td class="paramkey"></td>
  128. <td></td>
  129. <td class="paramtype">uint32_t&#160;</td>
  130. <td class="paramname"><em>f</em>, </td>
  131. </tr>
  132. <tr>
  133. <td class="paramkey"></td>
  134. <td></td>
  135. <td class="paramtype">const <a class="el" href="structMidiEvent.html">MidiEvent</a> *&#160;</td>
  136. <td class="paramname"><em>m</em>, </td>
  137. </tr>
  138. <tr>
  139. <td class="paramkey"></td>
  140. <td></td>
  141. <td class="paramtype">uint32_t&#160;</td>
  142. <td class="paramname"><em>mc</em>&#160;</td>
  143. </tr>
  144. <tr>
  145. <td></td>
  146. <td>)</td>
  147. <td></td><td></td>
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  150. </td>
  151. <td class="mlabels-right">
  152. <span class="mlabels"><span class="mlabel">inline</span></span> </td>
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  154. </table>
  155. </div><div class="memdoc">
  156. <p>Constructor, using values from the run function. </p>
  157. </div>
  158. </div>
  159. <h2 class="groupheader">Member Function Documentation</h2>
  160. <a id="a43f354c1520893449d81a27b3e7a81fe"></a>
  161. <h2 class="memtitle"><span class="permalink"><a href="#a43f354c1520893449d81a27b3e7a81fe">&#9670;&nbsp;</a></span>nextEvent()</h2>
  162. <div class="memitem">
  163. <div class="memproto">
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  165. <tr>
  166. <td class="mlabels-left">
  167. <table class="memname">
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  169. <td class="memname">bool AudioMidiSyncHelper::nextEvent </td>
  170. <td>(</td>
  171. <td class="paramname"></td><td>)</td>
  172. <td></td>
  173. </tr>
  174. </table>
  175. </td>
  176. <td class="mlabels-right">
  177. <span class="mlabels"><span class="mlabel">inline</span></span> </td>
  178. </tr>
  179. </table>
  180. </div><div class="memdoc">
  181. <p>Process a batch of events untill no more are available. You must not read any more values from this class after this function returns false. </p>
  182. </div>
  183. </div>
  184. <h2 class="groupheader">Member Data Documentation</h2>
  185. <a id="a7b54cae0fdaae3d23aaccf2dbb9344ef"></a>
  186. <h2 class="memtitle"><span class="permalink"><a href="#a7b54cae0fdaae3d23aaccf2dbb9344ef">&#9670;&nbsp;</a></span>outputs</h2>
  187. <div class="memitem">
  188. <div class="memproto">
  189. <table class="memname">
  190. <tr>
  191. <td class="memname">float* AudioMidiSyncHelper::outputs[2]</td>
  192. </tr>
  193. </table>
  194. </div><div class="memdoc">
  195. <p>Parameters from the run function, adjusted for event sync </p>
  196. </div>
  197. </div>
  198. <hr/>The documentation for this class was generated from the following file:<ul>
  199. <li>distrho/<a class="el" href="DistrhoPluginUtils_8hpp_source.html">DistrhoPluginUtils.hpp</a></li>
  200. </ul>
  201. </div><!-- contents -->
  202. <div class="ttc" id="astructMidiEvent_html"><div class="ttname"><a href="structMidiEvent.html">MidiEvent</a></div><div class="ttdef"><b>Definition:</b> DistrhoPlugin.hpp:616</div></div>
  203. <div class="ttc" id="aclassAudioMidiSyncHelper_html_a7b54cae0fdaae3d23aaccf2dbb9344ef"><div class="ttname"><a href="classAudioMidiSyncHelper.html#a7b54cae0fdaae3d23aaccf2dbb9344ef">AudioMidiSyncHelper::outputs</a></div><div class="ttdeci">float * outputs[2]</div><div class="ttdef"><b>Definition:</b> DistrhoPluginUtils.hpp:53</div></div>
  204. <div class="ttc" id="aclassAudioMidiSyncHelper_html_a43f354c1520893449d81a27b3e7a81fe"><div class="ttname"><a href="classAudioMidiSyncHelper.html#a43f354c1520893449d81a27b3e7a81fe">AudioMidiSyncHelper::nextEvent</a></div><div class="ttdeci">bool nextEvent()</div><div class="ttdef"><b>Definition:</b> DistrhoPluginUtils.hpp:78</div></div>
  205. <div class="ttc" id="aclassAudioMidiSyncHelper_html"><div class="ttname"><a href="classAudioMidiSyncHelper.html">AudioMidiSyncHelper</a></div><div class="ttdef"><b>Definition:</b> DistrhoPluginUtils.hpp:50</div></div>
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