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<h2>
<span class="refentrytitle">endop</span>
</h2>
<p>endop —
Marks the end of an user-defined opcode block.
</p>
</div>
<div class="refsect1">
<a id="idm281472939777816"></a>
<h2>Description</h2>
<p>
Marks the end of an user-defined opcode block.
</p>
</div>
<div class="refsect1">
<a id="idm281472939766216"></a>
<h2>Syntax</h2>
<pre class="synopsis">
<span class="command">
<strong>endop</strong>
</span>
</pre>
</div>
<div class="refsect1">
<a id="idm281472939764328"></a>
<h2>Performance</h2>
<p>
The syntax of a user-defined opcode block is as follows:
</p>
<pre class="programlisting">
<span class="oblock">opcode</span> <span class="command"><strong>name</strong></span>, outtypes, intypes
xinarg1 [, xinarg2] [, xinarg3] ... [xinargN] <span class="opc">xin</span>
[<span class="opc">setksmps</span> iksmps]
... the rest of the instrument's code.
<span class="opc">xout</span> xoutarg1 [, xoutarg2] [, xoutarg3] ... [xoutargN]
<span class="oblock">endop</span></pre>
<p>
</p>
<p>
The new opcode can then be used with the usual syntax:
</p>
<pre class="programlisting">
[xinarg1] [, xinarg2] ... [xinargN] <span class="command"><strong>name</strong></span> [xoutarg1] [, xoutarg2] ... [xoutargN] [, iksmps]</pre>
<p>
</p>
</div>
<div class="refsect1">
<a id="idm281472939713368"></a>
<h2>Examples</h2>
<p>
Here is an example of the endop opcode. It uses the file <a class="ulink" href="examples/endop.csd" target="_top"><em class="citetitle">endop.csd</em></a>.
</p>
<div class="example">
<a id="idm281472939711512"></a>
<p class="title">
<strong>Example 241. Example of the endop opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<div class="refsect1">
<a id="idm281472772050648"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
-odac <span class="c1">;;;realtime audio out</span>
<span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o endop.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">32</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="cm">/* example opcode 1: simple oscillator */</span>
<span class="kd">opcode</span> <span class="nf">Oscillator</span><span class="p">,</span> <span class="kt">a</span><span class="p">,</span> <span class="kt">kk</span>
k<span class="n">amp</span><span class="p">,</span> k<span class="n">cps</span> <span class="nb">xin</span> <span class="c1">; read input parameters</span>
a<span class="n">1</span> <span class="nb">vco2</span> k<span class="n">amp</span><span class="p">,</span> k<span class="n">cps</span> <span class="c1">; sawtooth oscillator</span>
<span class="nb">xout</span> a<span class="n">1</span> <span class="c1">; write output</span>
<span class="kd">endop</span>
<span class="cm">/* example opcode 2: lowpass filter with local ksmps */</span>
<span class="kd">opcode</span> <span class="nf">Lowpass</span><span class="p">,</span> <span class="kt">a</span><span class="p">,</span> <span class="kt">akk</span>
<span class="nb">setksmps</span> <span class="mi">1</span> <span class="c1">; need sr=kr</span>
a<span class="n">in</span><span class="p">,</span> k<span class="n">a1</span><span class="p">,</span> k<span class="n">a2</span> <span class="nb">xin</span> <span class="c1">; read input parameters</span>
a<span class="n">out</span> <span class="nb">init</span> <span class="mi">0</span> <span class="c1">; initialize output</span>
a<span class="n">out</span> <span class="o">=</span> a<span class="n">in</span><span class="o">*</span>k<span class="n">a1</span> <span class="o">+</span> a<span class="n">out</span><span class="o">*</span>k<span class="n">a2</span> <span class="c1">; simple tone-like filter</span>
<span class="nb">xout</span> a<span class="n">out</span> <span class="c1">; write output</span>
<span class="kd">endop</span>
<span class="cm">/* example opcode 3: recursive call */</span>
<span class="kd">opcode</span> <span class="nf">RecursiveLowpass</span><span class="p">,</span> <span class="kt">a</span><span class="p">,</span> <span class="kt">akkpp</span>
a<span class="n">in</span><span class="p">,</span> k<span class="n">a1</span><span class="p">,</span> k<span class="n">a2</span><span class="p">,</span> i<span class="n">dep</span><span class="p">,</span> i<span class="n">cnt</span> <span class="nb">xin</span> <span class="c1">; read input parameters</span>
<span class="k">if</span> <span class="p">(</span>i<span class="n">cnt</span> <span class="o">>=</span> i<span class="n">dep</span><span class="p">)</span> <span class="k">goto</span> <span class="nl">skip1</span> <span class="c1">; check if max depth reached</span>
a<span class="n">in</span> <span class="nf">RecursiveLowpass</span> a<span class="n">in</span><span class="p">,</span> k<span class="n">a1</span><span class="p">,</span> k<span class="n">a2</span><span class="p">,</span> i<span class="n">dep</span><span class="p">,</span> i<span class="n">cnt</span> <span class="o">+</span> <span class="mi">1</span>
<span class="nl">skip1</span><span class="p">:</span>
a<span class="n">out</span> <span class="nf">Lowpass</span> a<span class="n">in</span><span class="p">,</span> k<span class="n">a1</span><span class="p">,</span> k<span class="n">a2</span> <span class="c1">; call filter</span>
<span class="nb">xout</span> a<span class="n">out</span> <span class="c1">; write output</span>
<span class="kd">endop</span>
<span class="cm">/* example opcode 4: de-click envelope */</span>
<span class="kd">opcode</span> <span class="nf">DeClick</span><span class="p">,</span> <span class="kt">a</span><span class="p">,</span> <span class="kt">a</span>
a<span class="n">in</span> <span class="nb">xin</span>
a<span class="n">env</span> <span class="nb">linseg</span> <span class="mi">0</span><span class="p">,</span> <span class="mf">0.02</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span> <span class="o">-</span> <span class="mf">0.05</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.02</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mf">0.01</span><span class="p">,</span> <span class="mi">0</span>
<span class="nb">xout</span> a<span class="n">in</span> <span class="o">*</span> a<span class="n">env</span> <span class="c1">; apply envelope and write output</span>
<span class="kd">endop</span>
<span class="cm">/* instr 1 uses the example opcodes */</span>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">amp</span> <span class="o">=</span> <span class="mf">.6</span> <span class="c1">; amplitude</span>
k<span class="n">cps</span> <span class="nb">expon</span> <span class="mi">50</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">500</span> <span class="c1">; pitch</span>
a<span class="n">1</span> <span class="nf">Oscillator</span> k<span class="n">amp</span><span class="p">,</span> k<span class="n">cps</span> <span class="c1">; call oscillator</span>
k<span class="n">flt</span> <span class="nb">linseg</span> <span class="mf">0.4</span><span class="p">,</span> <span class="mf">1.5</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.8</span><span class="p">,</span> <span class="mf">1.5</span><span class="p">,</span> <span class="mf">0.8</span> <span class="c1">; filter envelope</span>
a<span class="n">1</span> <span class="nf">RecursiveLowpass</span> a<span class="n">1</span><span class="p">,</span> k<span class="n">flt</span><span class="p">,</span> <span class="mi">1</span> <span class="o">-</span> k<span class="n">flt</span><span class="p">,</span> <span class="mi">10</span> <span class="c1">; 10th order lowpass</span>
a<span class="n">1</span> <span class="nf">DeClick</span> a<span class="n">1</span>
<span class="nb">outs</span> a<span class="n">1</span><span class="p">,</span> a<span class="n">1</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">4</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1">
<a id="idm281472939707320"></a>
<h2>See Also</h2>
<p>
<a class="link" href="opcode.html" title="opcode"><em class="citetitle">opcode</em></a>,
<a class="link" href="setksmps.html" title="setksmps"><em class="citetitle">setksmps</em></a>,
<a class="link" href="xin.html" title="xin"><em class="citetitle">xin</em></a>,
<a class="link" href="xout.html" title="xout"><em class="citetitle">xout</em></a>
</p>
<p> More information on this opcode: <a class="ulink" href="http://www.csoundjournal.com/2006summer/controlFlow_part2.html" target="_top"><em class="citetitle">http://www.csoundjournal.com/2006summer/controlFlow_part2.html</em></a> , written by Steven Yi </p>
<p> The user-defined opcode page: <a class="ulink" href="http://www.csounds.com/udo/" target="_top"><em class="citetitle">http://www.csounds.com/udo/</em></a> , maintained by Steven Yi </p>
</div>
<div class="refsect1">
<a id="idm281472939699688"></a>
<h2>Credits</h2>
<p>Author: Istvan Varga, 2002; based on code by Matt J. Ingalls</p>
<p>New in version 4.22</p>
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