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<section id="data-control-py-multicore-midi-synthesizer">
<h1>04-data-control.py - Multicore midi synthesizer.<a class="headerlink" href="#data-control-py-multicore-midi-synthesizer" title="Permalink to this heading">¶</a></h1>
<p>Need at least 4 cores to be really effective.</p>
<dl class="simple">
<dt>Usage:</dt><dd><p>python3 -i 04-data-control.py</p>
</dd>
</dl>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">sys</span><span class="o">,</span> <span class="nn">time</span><span class="o">,</span> <span class="nn">multiprocessing</span>
<span class="kn">from</span> <span class="nn">random</span> <span class="kn">import</span> <span class="n">uniform</span>
<span class="kn">from</span> <a class="sphinx-codeautolink-a" href="../../api/alphabetical.html#module-pyo" title="pyo"><span class="nn">pyo</span></a> <span class="kn">import</span> <span class="o">*</span>
<span class="n">VOICES_PER_CORE</span> <span class="o">=</span> <span class="mi">4</span>
<span class="k">if</span> <span class="n">sys</span><span class="o">.</span><span class="n">platform</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s2">"linux"</span><span class="p">):</span>
<span class="n">audio</span> <span class="o">=</span> <span class="s2">"jack"</span>
<span class="k">elif</span> <span class="n">sys</span><span class="o">.</span><span class="n">platform</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s2">"darwin"</span><span class="p">):</span>
<span class="n">audio</span> <span class="o">=</span> <span class="s2">"portaudio"</span>
<span class="k">else</span><span class="p">:</span>
<span class="nb">print</span><span class="p">(</span><span class="s2">"Multicore examples don't run under Windows... Sorry!"</span><span class="p">)</span>
<span class="n">exit</span><span class="p">()</span>
<span class="k">class</span> <span class="nc">Proc</span><span class="p">(</span><span class="n">multiprocessing</span><span class="o">.</span><span class="n">Process</span><span class="p">):</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">pipe</span><span class="p">):</span>
<span class="nb">super</span><span class="p">(</span><span class="n">Proc</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">daemon</span> <span class="o">=</span> <span class="kc">True</span>
<span class="bp">self</span><span class="o">.</span><span class="n">pipe</span> <span class="o">=</span> <span class="n">pipe</span>
<span class="k">def</span> <span class="nf">run</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">server</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/server.html#pyo.Server" title="pyo.lib.server.Server"><span class="n">Server</span></a><span class="p">(</span><span class="n">audio</span><span class="o">=</span><span class="n">audio</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">deactivateMidi</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">boot</span><span class="p">()</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mid</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/midi.html#pyo.Notein" title="pyo.lib.midi.Notein"><span class="n">Notein</span></a><span class="p">(</span><span class="n">poly</span><span class="o">=</span><span class="n">VOICES_PER_CORE</span><span class="p">,</span> <span class="n">scale</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">first</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">last</span><span class="o">=</span><span class="mi">127</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">amp</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/midi.html#pyo.MidiAdsr" title="pyo.lib.midi.MidiAdsr"><span class="n">MidiAdsr</span></a><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mid</span><span class="p">[</span><span class="s2">"velocity"</span><span class="p">],</span> <span class="mf">0.005</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> <span class="mf">0.7</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="mf">0.01</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">pit</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">mid</span><span class="p">[</span><span class="s2">"pitch"</span><span class="p">]</span> <span class="o">*</span> <span class="p">[</span><span class="n">uniform</span><span class="p">(</span><span class="mf">0.99</span><span class="p">,</span> <span class="mf">1.01</span><span class="p">)</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">40</span><span class="p">)]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rc1</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.RCOsc" title="pyo.lib.generators.RCOsc"><span class="n">RCOsc</span></a><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">pit</span><span class="p">,</span> <span class="n">sharp</span><span class="o">=</span><span class="mf">0.8</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">amp</span><span class="p">)</span><span class="o">.</span><span class="n">mix</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rc2</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.RCOsc" title="pyo.lib.generators.RCOsc"><span class="n">RCOsc</span></a><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">pit</span> <span class="o">*</span> <span class="mf">0.99</span><span class="p">,</span> <span class="n">sharp</span><span class="o">=</span><span class="mf">0.8</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">amp</span><span class="p">)</span><span class="o">.</span><span class="n">mix</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mix</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/internals.html#pyo.Mix" title="pyo.lib._core.Mix"><span class="n">Mix</span></a><span class="p">([</span><span class="bp">self</span><span class="o">.</span><span class="n">rc1</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">rc2</span><span class="p">],</span> <span class="n">voices</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rev</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/effects.html#pyo.STRev" title="pyo.lib.effects.STRev"><span class="n">STRev</span></a><span class="p">(</span><a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Denorm" title="pyo.lib.utils.Denorm"><span class="n">Denorm</span></a><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">mix</span><span class="p">),</span> <span class="p">[</span><span class="mf">0.1</span><span class="p">,</span> <span class="mf">0.9</span><span class="p">],</span> <span class="mi">2</span><span class="p">,</span> <span class="n">bal</span><span class="o">=</span><span class="mf">0.30</span><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="k">while</span> <span class="kc">True</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">pipe</span><span class="o">.</span><span class="n">poll</span><span class="p">():</span>
<span class="n">data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">pipe</span><span class="o">.</span><span class="n">recv</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">addMidiEvent</span><span class="p">(</span><span class="o">*</span><span class="n">data</span><span class="p">)</span>
<span class="n">time</span><span class="o">.</span><span class="n">sleep</span><span class="p">(</span><span class="mf">0.001</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">stop</span><span class="p">()</span>
<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s2">"__main__"</span><span class="p">:</span>
<span class="n">main1</span><span class="p">,</span> <span class="n">child1</span> <span class="o">=</span> <span class="n">multiprocessing</span><span class="o">.</span><span class="n">Pipe</span><span class="p">()</span>
<span class="n">main2</span><span class="p">,</span> <span class="n">child2</span> <span class="o">=</span> <span class="n">multiprocessing</span><span class="o">.</span><span class="n">Pipe</span><span class="p">()</span>
<span class="n">main3</span><span class="p">,</span> <span class="n">child3</span> <span class="o">=</span> <span class="n">multiprocessing</span><span class="o">.</span><span class="n">Pipe</span><span class="p">()</span>
<span class="n">main4</span><span class="p">,</span> <span class="n">child4</span> <span class="o">=</span> <span class="n">multiprocessing</span><span class="o">.</span><span class="n">Pipe</span><span class="p">()</span>
<span class="n">mains</span> <span class="o">=</span> <span class="p">[</span><span class="n">main1</span><span class="p">,</span> <span class="n">main2</span><span class="p">,</span> <span class="n">main3</span><span class="p">,</span> <span class="n">main4</span><span class="p">]</span>
<span class="n">p1</span><span class="p">,</span> <span class="n">p2</span><span class="p">,</span> <span class="n">p3</span><span class="p">,</span> <span class="n">p4</span> <span class="o">=</span> <span class="n">Proc</span><span class="p">(</span><span class="n">child1</span><span class="p">),</span> <span class="n">Proc</span><span class="p">(</span><span class="n">child2</span><span class="p">),</span> <span class="n">Proc</span><span class="p">(</span><span class="n">child3</span><span class="p">),</span> <span class="n">Proc</span><span class="p">(</span><span class="n">child4</span><span class="p">)</span>
<span class="n">p1</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
<span class="n">p2</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
<span class="n">p3</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
<span class="n">p4</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
<span class="n">playing</span> <span class="o">=</span> <span class="p">{</span><span class="mi">0</span><span class="p">:</span> <span class="p">[],</span> <span class="mi">1</span><span class="p">:</span> <span class="p">[],</span> <span class="mi">2</span><span class="p">:</span> <span class="p">[],</span> <span class="mi">3</span><span class="p">:</span> <span class="p">[]}</span>
<span class="n">currentcore</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">def</span> <span class="nf">callback</span><span class="p">(</span><span class="n">status</span><span class="p">,</span> <span class="n">data1</span><span class="p">,</span> <span class="n">data2</span><span class="p">):</span>
<span class="k">global</span> <span class="n">currentcore</span>
<span class="k">if</span> <span class="n">status</span> <span class="o">==</span> <span class="mh">0x80</span> <span class="ow">or</span> <span class="n">status</span> <span class="o">==</span> <span class="mh">0x90</span> <span class="ow">and</span> <span class="n">data2</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">4</span><span class="p">):</span>
<span class="k">if</span> <span class="n">data1</span> <span class="ow">in</span> <span class="n">playing</span><span class="p">[</span><span class="n">i</span><span class="p">]:</span>
<span class="n">playing</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">data1</span><span class="p">)</span>
<span class="n">mains</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">send</span><span class="p">([</span><span class="n">status</span><span class="p">,</span> <span class="n">data1</span><span class="p">,</span> <span class="n">data2</span><span class="p">])</span>
<span class="k">break</span>
<span class="k">elif</span> <span class="n">status</span> <span class="o">==</span> <span class="mh">0x90</span><span class="p">:</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">4</span><span class="p">):</span>
<span class="n">currentcore</span> <span class="o">=</span> <span class="p">(</span><span class="n">currentcore</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">%</span> <span class="mi">4</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">playing</span><span class="p">[</span><span class="n">currentcore</span><span class="p">])</span> <span class="o"><</span> <span class="n">VOICES_PER_CORE</span><span class="p">:</span>
<span class="n">playing</span><span class="p">[</span><span class="n">currentcore</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">data1</span><span class="p">)</span>
<span class="n">mains</span><span class="p">[</span><span class="n">currentcore</span><span class="p">]</span><span class="o">.</span><span class="n">send</span><span class="p">([</span><span class="n">status</span><span class="p">,</span> <span class="n">data1</span><span class="p">,</span> <span class="n">data2</span><span class="p">])</span>
<span class="k">break</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/server.html#pyo.Server" title="pyo.lib.server.Server"><span class="n">s</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/server.html#pyo.Server" title="pyo.lib.server.Server"><span class="n">Server</span></a><span class="p">()</span>
<span class="n">s</span><span class="o">.</span><span class="n">setMidiInputDevice</span><span class="p">(</span><span class="mi">99</span><span class="p">)</span> <span class="c1"># Open all devices.</span>
<span class="n">s</span><span class="o">.</span><span class="n">boot</span><span class="p">()</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/midi.html#pyo.RawMidi" title="pyo.lib.midi.RawMidi"><span class="n">raw</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/midi.html#pyo.RawMidi" title="pyo.lib.midi.RawMidi"><span class="n">RawMidi</span></a><span class="p">(</span><span class="n">callback</span><span class="p">)</span>
</pre></div>
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