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<h2>
<span class="refentrytitle">ckgoto</span>
</h2>
<p>ckgoto —
Conditionally transfer control during the p-time passes.
</p>
</div>
<div class="refsect1">
<a id="idm281472946667432"></a>
<h2>Description</h2>
<p>
During the p-time passes only, conditionally transfer control to the statement labeled by <span class="emphasis"><em>label</em></span>.
</p>
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<div class="refsect1">
<a id="idm281472946665720"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>ckgoto</strong></span> condition, label</pre>
<p>
where <span class="emphasis"><em>label</em></span> is in the same instrument block and is not an expression, and where <span class="emphasis"><em>condition</em></span> uses one of the Relational operators (<span class="emphasis"><em><</em></span>,<span class="emphasis"><em> =</em></span>, <span class="emphasis"><em><=</em></span>, <span class="emphasis"><em>==</em></span>, <span class="emphasis"><em>!=</em></span>) (and <span class="emphasis"><em>=</em></span> for convenience, see also under <a class="link" href="ControlConditional.html" title="Conditional Values"><em class="citetitle">Conditional Values</em></a>).
</p>
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<div class="refsect1">
<a id="idm281472946579816"></a>
<h2>Examples</h2>
<p>
Here is an example of the ckgoto opcode. It uses the file <a class="ulink" href="examples/ckgoto.csd" target="_top"><em class="citetitle">ckgoto.csd</em></a>.
</p>
<div class="example">
<a id="idm281472946577960"></a>
<p class="title">
<strong>Example 128. Example of the ckgoto 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="idm281472780085912"></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>
<span class="c1">; Audio out Audio in No messages</span>
-odac -iadc -d <span class="c1">;;;RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o ckgoto.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="c1">; Initialize the global variables.</span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">kr</span> <span class="o">=</span> <span class="mi">4410</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">10</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1">; Instrument #1.</span>
<span class="kd">instr</span> <span class="nf">1</span>
<span class="c1">; Change kval linearly from 0 to 2 over</span>
<span class="c1">; the period set by the third p-field.</span>
k<span class="n">val</span> <span class="nb">line</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">2</span>
<span class="c1">; If kval is greater than or equal to 1 then play the high note.</span>
<span class="c1">; If not then play the low note.</span>
<span class="k">ckgoto</span> <span class="p">(</span>k<span class="n">val</span> <span class="o">>=</span> <span class="mi">1</span><span class="p">),</span> <span class="nl">highnote</span>
<span class="k">kgoto</span> <span class="nl">lownote</span>
<span class="nl">highnote</span><span class="p">:</span>
k<span class="n">freq</span> <span class="o">=</span> <span class="mi">880</span>
<span class="k">goto</span> <span class="nl">playit</span>
<span class="nl">lownote</span><span class="p">:</span>
k<span class="n">freq</span> <span class="o">=</span> <span class="mi">440</span>
<span class="k">goto</span> <span class="nl">playit</span>
<span class="nl">playit</span><span class="p">:</span>
<span class="c1">; Print the values of kval and kfreq.</span>
<span class="nb">printks</span> <span class="s">"kval = %f, kfreq = %f</span><span class="se">\\</span><span class="s">n"</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> k<span class="n">val</span><span class="p">,</span> k<span class="n">freq</span>
a<span class="n">1</span> <span class="nb">oscil</span> <span class="mi">10000</span><span class="p">,</span> k<span class="n">freq</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">out</span> a<span class="n">1</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">; Table: a simple sine wave.</span>
<span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">32768</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="c1">; Play Instrument #1 for two seconds.</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">2</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" />
Its output should include lines like:
</p>
<pre class="screen">
kval = 0.000000, kfreq = 440.000000
kval = 0.999732, kfreq = 440.000000
kval = 1.999639, kfreq = 880.000000</pre>
<p>
</p>
</div>
<div class="refsect1">
<a id="idm281472946572952"></a>
<h2>See Also</h2>
<p>
<a class="link" href="cggoto.html" title="cggoto"><em class="citetitle">cggoto</em></a>,
<a class="link" href="cigoto.html" title="cigoto"><em class="citetitle">cigoto</em></a>,
<a class="link" href="cngoto.html" title="cngoto"><em class="citetitle">cngoto</em></a>,
<a class="link" href="goto.html" title="goto"><em class="citetitle">goto</em></a>,
<a class="link" href="if.html" title="if"><em class="citetitle">if</em></a>,
<a class="link" href="igoto.html" title="igoto"><em class="citetitle">igoto</em></a>,
<a class="link" href="tigoto.html" title="tigoto"><em class="citetitle">tigoto</em></a>,
<a class="link" href="timout.html" title="timout"><em class="citetitle">timout</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472946564216"></a>
<h2>Credits</h2>
<p>Example written by Kevin Conder.</p>
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distrib
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Mageia
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7
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armv7hl
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media
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core-release
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by-pkgid
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5fcfcb7517038d1f44ab4e478e6e61fa
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450
