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<li class="toctree-l4"><a class="reference internal" href="#std.ShuffleChannels"><code class="docutils literal notranslate"><span class="pre">ShuffleChannels()</span></code></a></li>
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<section id="shufflechannels">
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<h1>ShuffleChannels<a class="headerlink" href="#shufflechannels" title="Permalink to this heading"></a></h1>
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<dl class="py function">
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<dt class="sig sig-object py" id="std.ShuffleChannels">
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<span class="sig-prename descclassname"><span class="pre">std.</span></span><span class="sig-name descname"><span class="pre">ShuffleChannels</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">anode[]</span> <span class="pre">clips</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">int[]</span> <span class="pre">channels_in</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">int[]</span> <span class="pre">channels_out</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#std.ShuffleChannels" title="Permalink to this definition"></a></dt>
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<dd><p>ShuffleChannels can extract and combine channels from different clips in the most
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general way possible.</p>
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<p>Most of the returned clip’s properties are implicitly determined from the
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first clip given to <em>clips</em>.</p>
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<p>The <em>clips</em> parameter takes one or more clips with the same format. If the clips
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are different lengths they’ll be zero extended to that of the longest.</p>
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<p>The argument <em>channels_in</em> controls which of the input clips’ channels to use and
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takes a channel constants as its argument. Specifying a non-existent channel
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is an error. If more <em>channels_in</em> than <em>clips</em> values are specified then the last
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clip in the <em>clips</em> list is reused as a source. In addition to the channel constant
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it’s also possible to specify the nth channel by using negative numbers.</p>
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<p>The output channel mapping is determined by <em>channels_out</em> and corresponds to the
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input channel order. The number of <em>channels_out</em> entries must be the same as the
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number of <em>channels_in</em> entries. Specifying the same output channel twice is an error.</p>
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<p>Below are some examples of useful operations.</p>
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<p>Extract the left channel (assuming it exists):</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">ShuffleChannels</span><span class="p">(</span><span class="n">clips</span><span class="o">=</span><span class="n">clip</span><span class="p">,</span> <span class="n">channels_in</span><span class="o">=</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">,</span> <span class="n">channels_out</span><span class="o">=</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">)</span>
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</pre></div>
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</div>
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<p>Swap left and right audio channels in a stereo clip:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">ShuffleChannels</span><span class="p">(</span><span class="n">clips</span><span class="o">=</span><span class="n">clip</span><span class="p">,</span> <span class="n">channels_in</span><span class="o">=</span><span class="p">[</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_RIGHT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">],</span> <span class="n">channels_out</span><span class="o">=</span><span class="p">[</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">FRONT_RIGHT</span><span class="p">])</span>
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</pre></div>
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</div>
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<p>Swap left and right audio channels in a stereo clip (alternate ordering of arguments):</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">ShuffleChannels</span><span class="p">(</span><span class="n">clips</span><span class="o">=</span><span class="n">clip</span><span class="p">,</span> <span class="n">channels_in</span><span class="o">=</span><span class="p">[</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">FRONT_RIGHT</span><span class="p">],</span> <span class="n">channels_out</span><span class="o">=</span><span class="p">[</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_RIGHT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">])</span>
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</pre></div>
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</div>
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<p>Swap left and right audio channels in a stereo clip (alternate indexing):</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">ShuffleChannels</span><span class="p">(</span><span class="n">clips</span><span class="o">=</span><span class="n">clip</span><span class="p">,</span> <span class="n">channels_in</span><span class="o">=</span><span class="p">[</span><span class="o">-</span><span class="mi">2</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">],</span> <span class="n">channels_out</span><span class="o">=</span><span class="p">[</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">FRONT_RIGHT</span><span class="p">])</span>
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</pre></div>
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</div>
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<p>Merge 2 mono audio clips into a single stereo clip:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">ShuffleChannels</span><span class="p">(</span><span class="n">clips</span><span class="o">=</span><span class="p">[</span><span class="n">clipa</span><span class="p">,</span> <span class="n">clipb</span><span class="p">],</span> <span class="n">channels_in</span><span class="o">=</span><span class="p">[</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">],</span> <span class="n">channels_out</span><span class="o">=</span><span class="p">[</span><span class="n">vs</span><span class="o">.</span><span class="n">FRONT_LEFT</span><span class="p">,</span> <span class="n">vs</span><span class="o">.</span><span class="n">FRONT_RIGHT</span><span class="p">])</span>
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