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<section id="synchronization-py-synchronizing-multiple-processes">
<h1>03-synchronization.py - Synchronizing multiple processes.<a class="headerlink" href="#synchronization-py-synchronizing-multiple-processes" title="Permalink to this heading">¶</a></h1>
<dl class="simple">
<dt>Usage:</dt><dd><p>python3 -i 03-synchronization.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">random</span><span class="o">,</span> <span class="nn">multiprocessing</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">RECORD</span> <span class="o">=</span> <span class="kc">False</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="nb">print</span><span class="p">(</span><span class="s2">"SharedTable does not behave correctly under MacOS... This example doesn't work."</span><span class="p">)</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">Main</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="nb">super</span><span class="p">(</span><span class="n">Main</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="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="n">bufsize</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">getBufferSize</span><span class="p">()</span>
<span class="k">if</span> <span class="n">RECORD</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">recstart</span><span class="p">(</span><span class="s2">"synchronization.wav"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tab1</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.SharedTable" title="pyo.lib.tables.SharedTable"><span class="n">SharedTable</span></a><span class="p">(</span><span class="s2">"/audio-1"</span><span class="p">,</span> <span class="n">create</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">size</span><span class="o">=</span><span class="n">bufsize</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tab2</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.SharedTable" title="pyo.lib.tables.SharedTable"><span class="n">SharedTable</span></a><span class="p">(</span><span class="s2">"/audio-2"</span><span class="p">,</span> <span class="n">create</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">size</span><span class="o">=</span><span class="n">bufsize</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">out1</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tableprocess.html#pyo.TableScan" title="pyo.lib.tableprocess.TableScan"><span class="n">TableScan</span></a><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">tab1</span><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">out2</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tableprocess.html#pyo.TableScan" title="pyo.lib.tableprocess.TableScan"><span class="n">TableScan</span></a><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">tab2</span><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">(</span><span class="mi">1</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="mi">30</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">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">voice</span><span class="p">,</span> <span class="n">conn</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">voice</span> <span class="o">=</span> <span class="n">voice</span>
<span class="bp">self</span><span class="o">.</span><span class="n">connection</span> <span class="o">=</span> <span class="n">conn</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="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="n">bufsize</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">getBufferSize</span><span class="p">()</span>
<span class="n">name</span> <span class="o">=</span> <span class="s2">"/audio-</span><span class="si">%d</span><span class="s2">"</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">voice</span>
<span class="bp">self</span><span class="o">.</span><span class="n">audiotable</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.SharedTable" title="pyo.lib.tables.SharedTable"><span class="n">SharedTable</span></a><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">create</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">size</span><span class="o">=</span><span class="n">bufsize</span><span class="p">)</span>
<span class="n">onsets</span> <span class="o">=</span> <span class="n">random</span><span class="o">.</span><span class="n">sample</span><span class="p">([</span><span class="mi">5</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="mi">7</span><span class="p">,</span> <span class="mi">8</span><span class="p">,</span> <span class="mi">9</span><span class="p">],</span> <span class="mi">2</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tab</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tables.html#pyo.CosTable" title="pyo.lib.tables.CosTable"><span class="n">CosTable</span></a><span class="p">([(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">),</span> <span class="p">(</span><span class="mi">32</span><span class="p">,</span> <span class="mi">1</span><span class="p">),</span> <span class="p">(</span><span class="mi">512</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">),</span> <span class="p">(</span><span class="mi">4096</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">),</span> <span class="p">(</span><span class="mi">8191</span><span class="p">,</span> <span class="mi">0</span><span class="p">)])</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ryt</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/triggers.html#pyo.Euclide" title="pyo.lib.triggers.Euclide"><span class="n">Euclide</span></a><span class="p">(</span><span class="n">time</span><span class="o">=</span><span class="mf">0.125</span><span class="p">,</span> <span class="n">taps</span><span class="o">=</span><span class="mi">16</span><span class="p">,</span> <span class="n">onsets</span><span class="o">=</span><span class="n">onsets</span><span class="p">,</span> <span class="n">poly</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span><span class="o">.</span><span class="n">play</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/triggers.html#pyo.TrigXnoiseMidi" title="pyo.lib.triggers.TrigXnoiseMidi"><span class="n">TrigXnoiseMidi</span></a><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">ryt</span><span class="p">,</span> <span class="n">dist</span><span class="o">=</span><span class="mi">12</span><span class="p">,</span> <span class="n">mrange</span><span class="o">=</span><span class="p">(</span><span class="mi">60</span><span class="p">,</span> <span class="mi">96</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">frq</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/utils.html#pyo.Snap" title="pyo.lib.utils.Snap"><span class="n">Snap</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="n">choice</span><span class="o">=</span><span class="p">[</span><span class="mi">0</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">5</span><span class="p">,</span> <span class="mi">7</span><span class="p">,</span> <span class="mi">8</span><span class="p">,</span> <span class="mi">10</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="bp">self</span><span class="o">.</span><span class="n">amp</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/triggers.html#pyo.TrigEnv" title="pyo.lib.triggers.TrigEnv"><span class="n">TrigEnv</span></a><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">ryt</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">tab</span><span class="p">,</span> <span class="n">dur</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">ryt</span><span class="p">[</span><span class="s2">"dur"</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">ryt</span><span class="p">[</span><span class="s2">"amp"</span><span class="p">])</span>
<span class="bp">self</span><span class="o">.</span><span class="n">sig</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/generators.html#pyo.SineLoop" title="pyo.lib.generators.SineLoop"><span class="n">SineLoop</span></a><span class="p">(</span><span class="n">freq</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">frq</span><span class="p">,</span> <span class="n">feedback</span><span class="o">=</span><span class="mf">0.08</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="o">*</span> <span class="mf">0.3</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">fil</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/tableprocess.html#pyo.TableFill" title="pyo.lib.tableprocess.TableFill"><span class="n">TableFill</span></a><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">sig</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">audiotable</span><span class="p">)</span>
<span class="c1"># Wait for an incoming signal before starting the server.</span>
<span class="k">while</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">connection</span><span class="o">.</span><span class="n">poll</span><span class="p">():</span>
<span class="k">pass</span>
<span class="bp">self</span><span class="o">.</span><span class="n">server</span><span class="o">.</span><span class="n">start</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="mi">30</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">signal</span><span class="p">,</span> <span class="n">child</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">p1</span><span class="p">,</span> <span class="n">p2</span> <span class="o">=</span> <span class="n">Proc</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="n">child</span><span class="p">),</span> <span class="n">Proc</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="n">child</span><span class="p">)</span>
<span class="n">main</span> <span class="o">=</span> <span class="n">Main</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">time</span><span class="o">.</span><span class="n">sleep</span><span class="p">(</span><span class="mf">0.1</span><span class="p">)</span>
<span class="n">main</span><span class="o">.</span><span class="n">start</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">0.1</span><span class="p">)</span>
<span class="n">signal</span><span class="o">.</span><span class="n">send</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
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