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<h2>
<span class="refentrytitle">pcount</span>
</h2>
<p>pcount —
Returns the number of pfields belonging to a note event.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp35830528"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>pcount</em></span> returns the number of pfields belonging to a note event.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp35831480"></a>
<h2>Syntax</h2>
<pre class="synopsis">icount <span class="command"><strong>pcount</strong></span></pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp35832528"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>icount</em></span> - stores the number of pfields for the current note event.
</p>
<div class="note" title="Note" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25">
<img alt="[Note]" src="images/note.png" />
</td>
<th align="left">Note</th>
</tr>
<tr>
<td align="left" valign="top">
<p>
Note that the reported number of pfields is not necessarily what's explicitly written in the score, but the pfields available to the instrument through mechanisms like <a class="link" href="ScoreTop.html#ScoreCarry" title="Carry"><em class="citetitle">pfield carry</em></a>.
</p>
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<div class="refsect1" title="Examples">
<a id="idp35883400"></a>
<h2>Examples</h2>
<p>
Here is an example of the pcount opcode. It uses the file <a class="ulink" href="examples/pcount.csd" target="_top"><em class="citetitle">pcount.csd</em></a>.
</p>
<div class="example">
<a id="idp35884320"></a>
<p class="title">
<strong>Example 578. Example of the pcount 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>
<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</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 pcount.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="comment">; This UDO returns a pfield value but returns 0 if it does not exist.</span>
<span class="oblock">opcode</span> mypvalue, i, <span class="opc">i</span>
index <span class="opc">xin</span>
inum <span class="opc">pcount</span>
<span class="octrl">if</span> (index <span class="op">></span> inum) then
iout <span class="op">=</span> 0.0
<span class="octrl">else</span>
iout <span class="opc">pindex</span> index
<span class="octrl">endif</span>
<span class="opc">xout</span> iout
<span class="oblock">endop</span>
<span class="comment">; Envelope UDO that reads parameters from a flexible number of pfields</span>
<span class="comment">; Syntax: kenv flexlinseg ipstart</span>
<span class="comment">; ipstart is the first pfield of the envelope</span>
<span class="comment">; parameters. Reads remaining pfields (up to 21 of them).</span>
<span class="comment">; kenv is the output envelope.</span>
<span class="oblock">opcode</span> flexlinseg, k, <span class="opc">i</span>
ipstart <span class="opc">xin</span>
iep1 mypvalue ipstart
iep2 mypvalue ipstart <span class="op">+</span> 1
iep3 mypvalue ipstart <span class="op">+</span> 2
iep4 mypvalue ipstart <span class="op">+</span> 3
iep5 mypvalue ipstart <span class="op">+</span> 4
iep6 mypvalue ipstart <span class="op">+</span> 5
iep7 mypvalue ipstart <span class="op">+</span> 6
iep8 mypvalue ipstart <span class="op">+</span> 7
iep9 mypvalue ipstart <span class="op">+</span> 8
iepa mypvalue ipstart <span class="op">+</span> 9
iepb mypvalue ipstart <span class="op">+</span> 10
iepc mypvalue ipstart <span class="op">+</span> 11
iepd mypvalue ipstart <span class="op">+</span> 12
iepe mypvalue ipstart <span class="op">+</span> 13
iepf mypvalue ipstart <span class="op">+</span> 14
iepg mypvalue ipstart <span class="op">+</span> 15
ieph mypvalue ipstart <span class="op">+</span> 16
iepi mypvalue ipstart <span class="op">+</span> 17
iepj mypvalue ipstart <span class="op">+</span> 18
iepk mypvalue ipstart <span class="op">+</span> 19
iepl mypvalue ipstart <span class="op">+</span> 20
kenv <span class="opc">linseg</span> iep1, iep2, iep3, iep4, iep5, iep6, iep7, iep8, \
iep9, iepa, iepb, iepc, iepd, iepe, iepf, iepg, \
ieph, iepi, iepj, iepk, iepl
<span class="opc">xout</span> kenv
<span class="oblock">endop</span>
<span class="oblock">instr</span> 1
<span class="comment">; This instrument only requires 3 pfields but can accept up to 24.</span>
<span class="comment">; (You will still get warnings about more than 3). </span>
kenv flexlinseg 4 <span class="comment">; envelope params start at p4</span>
aout <span class="opc">oscili</span> kenv<span class="op">*</span>.5, 256, 1
<span class="opc">outs</span> aout, aout
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">f</span>1 0 8192 10 1
<span class="stamnt">i</span>1 0 2 0.0 1.0 1.0 1.0 0.0
<span class="stamnt">i</span>1 2 2 0.0 0.1 1.0 1.0 1.0 0.1 0.0
<span class="stamnt">i</span>1 4 2 0.0 0.5 0.0 <span class="comment">; one problem is that "missing" pfields carry</span>
<span class="stamnt">i</span>1 6 2 0.0 0.5 0.0 ! <span class="comment">; now we can fix this problem with !</span>
<span class="stamnt">i</span>1 8 10 0.0 3.0 1.0 0.3 0.1 0.3 1.0 0.3 0.1 0.3 1.0 0.3 0.1 0.8 0.9 5.0 0.0
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
<p>
The example will produce the following output:
</p>
<pre class="screen">
WARNING: instr 1 uses 3 p-fields but is given 8
B 0.000 .. 2.000 T 2.000 TT 2.000 M: 0.49966 0.49966
WARNING: instr 1 uses 3 p-fields but is given 10
B 2.000 .. 4.000 T 4.000 TT 4.000 M: 0.50000 0.50000
WARNING: instr 1 uses 3 p-fields but is given 10
B 4.000 .. 6.000 T 6.000 TT 6.000 M: 0.49943 0.49943
WARNING: instr 1 uses 3 p-fields but is given 6
B 6.000 .. 8.000 T 8.000 TT 8.000 M: 0.00000 0.00000
WARNING: instr 1 uses 3 p-fields but is given 20
B 8.000 .. 18.000 T 18.000 TT 18.000 M: 0.49994 0.49994
</pre>
<p>
The warnings occur because pfields are not used explicitly by the instrument.
</p>
</div>
<div class="refsect1" title="See Also">
<a id="idp35888616"></a>
<h2>See Also</h2>
<p>
<a class="link" href="pindex.html" title="pindex"><em class="citetitle">pindex</em></a>
</p>
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<div class="refsect1" title="Credits">
<a id="idp35889712"></a>
<h2>Credits</h2>
<p>Example by: Anthony Kozar</p>
<p>Dec. 2006</p>
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