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<section id="read-from-disk-2-py-catching-the-end-of-file-signal-from-the-sfplayer-object">
<h1>02-read-from-disk-2.py - Catching the <cite>end-of-file</cite> signal from the SfPlayer object.<a class="headerlink" href="#read-from-disk-2-py-catching-the-end-of-file-signal-from-the-sfplayer-object" title="Permalink to this heading">¶</a></h1>
<p>This example demonstrates how to use the <cite>end-of-file</cite> signal
of the SfPlayer object to trigger another playback (possibly
with another sound, another speed, etc.).</p>
<p>When a SfPlayer reaches the end of the file, it sends a trigger
(more on trigger later) that the user can retrieve with the
syntax :</p>
<p>variable_name[“trig”]</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></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="kn">import</span> <span class="nn">random</span>
<span class="n">s</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="o">.</span><span class="n">boot</span><span class="p">()</span>
<span class="c1"># Sound bank</span>
<span class="n">folder</span> <span class="o">=</span> <span class="s2">"../snds/"</span>
<span class="n">sounds</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"alum1.wav"</span><span class="p">,</span> <span class="s2">"alum2.wav"</span><span class="p">,</span> <span class="s2">"alum3.wav"</span><span class="p">,</span> <span class="s2">"alum4.wav"</span><span class="p">]</span>
<span class="c1"># Creates the left and right players</span>
<span class="n">sfL</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/players.html#pyo.SfPlayer" title="pyo.lib.players.SfPlayer"><span class="n">SfPlayer</span></a><span class="p">(</span><span class="n">folder</span> <span class="o">+</span> <span class="n">sounds</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">speed</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="mf">0.5</span><span class="p">)</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="n">sfR</span> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/players.html#pyo.SfPlayer" title="pyo.lib.players.SfPlayer"><span class="n">SfPlayer</span></a><span class="p">(</span><span class="n">folder</span> <span class="o">+</span> <span class="n">sounds</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">speed</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">mul</span><span class="o">=</span><span class="mf">0.5</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="c1"># Function to choose a new sound and a new speed for the left player</span>
<span class="k">def</span> <span class="nf">newL</span><span class="p">():</span>
<span class="n">sfL</span><span class="o">.</span><span class="n">path</span> <span class="o">=</span> <span class="n">folder</span> <span class="o">+</span> <span class="n">sounds</span><span class="p">[</span><span class="n">random</span><span class="o">.</span><span class="n">randint</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">3</span><span class="p">)]</span>
<span class="n">sfL</span><span class="o">.</span><span class="n">speed</span> <span class="o">=</span> <span class="n">random</span><span class="o">.</span><span class="n">uniform</span><span class="p">(</span><span class="mf">0.75</span><span class="p">,</span> <span class="mf">1.5</span><span class="p">)</span>
<span class="n">sfL</span><span class="o">.</span><span class="n">out</span><span class="p">()</span>
<span class="c1"># The "end-of-file" signal triggers the function "newL"</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/triggers.html#pyo.TrigFunc" title="pyo.lib.triggers.TrigFunc"><span class="n">tfL</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/triggers.html#pyo.TrigFunc" title="pyo.lib.triggers.TrigFunc"><span class="n">TrigFunc</span></a><span class="p">(</span><span class="n">sfL</span><span class="p">[</span><span class="s2">"trig"</span><span class="p">],</span> <span class="n">newL</span><span class="p">)</span>
<span class="c1"># Function to choose a new sound and a new speed for the right player</span>
<span class="k">def</span> <span class="nf">newR</span><span class="p">():</span>
<span class="n">sfR</span><span class="o">.</span><span class="n">path</span> <span class="o">=</span> <span class="n">folder</span> <span class="o">+</span> <span class="n">sounds</span><span class="p">[</span><span class="n">random</span><span class="o">.</span><span class="n">randint</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">3</span><span class="p">)]</span>
<span class="n">sfR</span><span class="o">.</span><span class="n">speed</span> <span class="o">=</span> <span class="n">random</span><span class="o">.</span><span class="n">uniform</span><span class="p">(</span><span class="mf">0.75</span><span class="p">,</span> <span class="mf">1.5</span><span class="p">)</span>
<span class="n">sfR</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="c1"># The "end-of-file" signal triggers the function "newR"</span>
<a class="sphinx-codeautolink-a" href="../../api/classes/triggers.html#pyo.TrigFunc" title="pyo.lib.triggers.TrigFunc"><span class="n">tfR</span></a> <span class="o">=</span> <a class="sphinx-codeautolink-a" href="../../api/classes/triggers.html#pyo.TrigFunc" title="pyo.lib.triggers.TrigFunc"><span class="n">TrigFunc</span></a><span class="p">(</span><span class="n">sfR</span><span class="p">[</span><span class="s2">"trig"</span><span class="p">],</span> <span class="n">newR</span><span class="p">)</span>
<span class="n">s</span><span class="o">.</span><span class="n">gui</span><span class="p">(</span><span class="nb">locals</span><span class="p">())</span>
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