<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>pindex</title>
<link rel="stylesheet" type="text/css" href="csound.css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1" />
<link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
<link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" />
<link rel="prev" href="phasorbnk.html" title="phasorbnk" />
<link rel="next" href="pinkish.html" title="pinkish" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">pindex</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="phasorbnk.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="pinkish.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry" title="pindex">
<a id="pindex"></a>
<div class="titlepage"></div>
<a id="IndexPindex" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">pindex</span>
</h2>
<p>pindex —
Returns the value of a specified pfield.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp36260632"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>pindex</em></span> returns the value of a specified pfield.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp36261552"></a>
<h2>Syntax</h2>
<pre class="synopsis">ivalue <span class="command"><strong>pindex</strong></span> ipfieldIndex</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp36271992"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ipfieldIndex</em></span> - pfield number to query.
</p>
<p>
<span class="emphasis"><em>ivalue</em></span> - value of the pfield.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp36273608"></a>
<h2>Examples</h2>
<p>
Here is an example of the pindex opcode. It uses the file <a class="ulink" href="examples/pindex.csd" target="_top"><em class="citetitle">pindex.csd</em></a>.
</p>
<div class="example">
<a id="idp36274528"></a>
<p class="title">
<strong>Example 590. Example of the pindex 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>
<span class="comment">; Audio out Audio in No messages MIDI in</span>
-odac -iadc <span class="comment">; -d -M0 ;;;RT audio I/O with MIDI in</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">;-o pindex.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">;Example by Anthony Kozar Dec 2006</span>
<span class="oblock">instr</span> 1
inum <span class="opc">pcount</span>
index <span class="opc">init</span> 1
loop1<span class="op">:</span>
ivalue <span class="opc">pindex</span> index
<span class="opc">printf_i</span> "p<span class="op">%</span>d <span class="op">=</span> <span class="op">%</span>f\n", 1, index, ivalue
index <span class="op">=</span> index <span class="op">+</span> 1
<span class="octrl">if</span> (index <span class="op"><=</span> inum) <span class="octrl">igoto</span> loop1
<span class="opc">print</span> inum
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>1 0 3 40 50 <span class="comment">; has 5 pfields</span>
<span class="stamnt">i</span>1 1 2 80 <span class="comment">; has 5 due to carry</span>
<span class="stamnt">i</span>1 2 1 40 50 60 70 <span class="comment">; has 7</span>
<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">
new alloc for instr 1:
WARNING: instr 1 uses 3 p-fields but is given 5
p1 = 1.000000
p2 = 0.000000
p3 = 3.000000
p4 = 40.000000
p5 = 50.000000
instr 1: inum = 5.000
B 0.000 .. 1.000 T 1.000 TT 1.000 M: 0.0
new alloc for instr 1:
WARNING: instr 1 uses 3 p-fields but is given 5
p1 = 1.000000
p2 = 1.000000
p3 = 2.000000
p4 = 80.000000
p5 = 50.000000
instr 1: inum = 5.000
B 1.000 .. 2.000 T 2.000 TT 2.000 M: 0.0
new alloc for instr 1:
WARNING: instr 1 uses 3 p-fields but is given 7
p1 = 1.000000
p2 = 2.000000
p3 = 1.000000
p4 = 40.000000
p5 = 50.000000
p6 = 60.000000
p7 = 70.000000
instr 1: inum = 7.000
</pre>
<p>
The warnings can be ignored, because the pfields are used indirectly through pindex instead of explicitly through p4, p5, etc.
</p>
<p>
Here is another example of the pindex opcode. It uses the file <a class="ulink" href="examples/pindex-2.csd" target="_top"><em class="citetitle">pindex-2.csd</em></a>.
</p>
<div class="example">
<a id="idp36310240"></a>
<p class="title">
<strong>Example 591. Second example of the pindex opcode.</strong>
</p>
<div class="example-contents">
<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 pindex-2.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>
</p>
</div>
<div class="refsect1" title="See Also">
<a id="idp36313104"></a>
<h2>See Also</h2>
<p>
<a class="link" href="pcount.html" title="pcount"><em class="citetitle">pcount</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp36314232"></a>
<h2>Credits</h2>
<p>Example by: Anthony Kozar</p>
<p>Dec. 2006</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="phasorbnk.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="OpcodesTop.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="pinkish.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">phasorbnk </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> pinkish</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mageia
>
5
>
x86_64
>
media
>
core-release
>
by-pkgid
>
b707d9a4ee443103660a75ccb6e51334
>
files
>
2362
