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<div class="refentry" title="endop">
<a id="endop"></a>
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<a id="IndexEndop" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">endop</span>
</h2>
<p>endop —
Marks the end of an user-defined opcode block.
</p>
</div>
<div class="refsect1" title="Description">
<a id="id2835821"></a>
<h2>Description</h2>
<p>
Marks the end of an user-defined opcode block.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="id2835839"></a>
<h2>Syntax</h2>
<pre class="synopsis">
<span class="command">
<strong>endop</strong>
</span>
</pre>
</div>
<div class="refsect1" title="Performance">
<a id="id2835855"></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" title="Examples">
<a id="id2836808"></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="id2836824"></a>
<p class="title">
<b>Example 185. Example of the endop opcode.</b>
</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>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o endop.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="op">/</span><span class="op">*</span> example <span class="oblock">opcode</span> 1<span class="op">:</span> simple oscillator <span class="op">*</span><span class="op">/</span>
<span class="oblock">opcode</span> Oscillator, a, kk
kamp, kcps <span class="opc">xin</span> <span class="comment">; read input parameters</span>
a1 <span class="opc">vco2</span> kamp, kcps <span class="comment">; sawtooth oscillator</span>
<span class="opc">xout</span> a1 <span class="comment">; write output</span>
<span class="oblock">endop</span>
<span class="op">/</span><span class="op">*</span> example <span class="oblock">opcode</span> 2<span class="op">:</span> lowpass filter with local <span class="ohdr">ksmps</span> <span class="op">*</span><span class="op">/</span>
<span class="oblock">opcode</span> Lowpass, a, akk
<span class="opc">setksmps</span> 1 <span class="comment">; need sr=kr</span>
ain, ka1, ka2 <span class="opc">xin</span> <span class="comment">; read input parameters</span>
aout <span class="opc">init</span> 0 <span class="comment">; initialize output</span>
aout <span class="op">=</span> ain<span class="op">*</span>ka1 <span class="op">+</span> aout<span class="op">*</span>ka2 <span class="comment">; simple tone-like filter</span>
<span class="opc">xout</span> aout <span class="comment">; write output</span>
<span class="oblock">endop</span>
<span class="op">/</span><span class="op">*</span> example <span class="oblock">opcode</span> 3<span class="op">:</span> recursive call <span class="op">*</span><span class="op">/</span>
<span class="oblock">opcode</span> RecursiveLowpass, a, akkpp
ain, ka1, ka2, idep, icnt <span class="opc">xin</span> <span class="comment">; read input parameters</span>
<span class="octrl">if</span> (icnt <span class="op">>=</span> idep) <span class="octrl">goto</span> <span class="olabel">skip1</span> <span class="comment">; check if max depth reached</span>
ain RecursiveLowpass ain, ka1, ka2, idep, icnt <span class="op">+</span> 1
<span class="olabel">skip1</span><span class="op">:</span>
aout Lowpass ain, ka1, ka2 <span class="comment">; call filter</span>
<span class="opc">xout</span> aout <span class="comment">; write output</span>
<span class="oblock">endop</span>
<span class="op">/</span><span class="op">*</span> example <span class="oblock">opcode</span> 4<span class="op">:</span> de<span class="op">-</span>click envelope <span class="op">*</span><span class="op">/</span>
<span class="oblock">opcode</span> DeClick, a, <span class="opc">a</span>
ain <span class="opc">xin</span>
aenv <span class="opc">linseg</span> 0, 0.02, 1, p3 <span class="op">-</span> 0.05, 1, 0.02, 0, 0.01, 0
<span class="opc">xout</span> ain <span class="op">*</span> aenv <span class="comment">; apply envelope and write output</span>
<span class="oblock">endop</span>
<span class="op">/</span><span class="op">*</span> <span class="oblock">instr</span> 1 uses the example opcodes <span class="op">*</span><span class="op">/</span>
<span class="oblock">instr</span> 1
kamp <span class="op">=</span> .6 <span class="comment">; amplitude</span>
kcps <span class="opc">expon</span> 50, p3, 500 <span class="comment">; pitch</span>
a1 Oscillator kamp, kcps <span class="comment">; call oscillator</span>
kflt <span class="opc">linseg</span> 0.4, 1.5, 0.4, 1, 0.8, 1.5, 0.8 <span class="comment">; filter envelope</span>
a1 RecursiveLowpass a1, kflt, 1 <span class="op">-</span> kflt, 10 <span class="comment">; 10th order lowpass</span>
a1 DeClick a1
<span class="opc">outs</span> a1, a1
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span> 1 0 4
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="See Also">
<a id="id2836862"></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.csounds.com/journal/2006summer/controlFlow_part2.html" target="_top"><em class="citetitle">http://www.csounds.com/journal/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" title="Credits">
<a id="id2836928"></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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