<?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>filevalid</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="filesr.html" title="filesr" /> <link rel="next" href="filter2.html" title="filter2" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">filevalid</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="filesr.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="filter2.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry" title="filevalid"> <a id="filevalid"></a> <div class="titlepage"></div> <a id="IndexFilevalid" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">filevalid</span> </h2> <p>filevalid — Checks that a file can be used. </p> </div> <div class="refsect1" title="Description"> <a id="idp20125432"></a> <h2>Description</h2> <p> Returns 1 if the sound file is valid, or 0 if not. </p> </div> <div class="refsect1" title="Syntax"> <a id="idp20126096"></a> <h2>Syntax</h2> <pre class="synopsis">ir <span class="command"><strong>filevalid</strong></span> ifilcod</pre> </div> <div class="refsect1" title="Initialization"> <a id="idp20136544"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>ifilcod</em></span> -- sound file to be queried </p> </div> <div class="refsect1" title="Performance"> <a id="idp20137368"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>filevalid</em></span> returns 1 if the sound file <span class="emphasis"><em>ifilcod</em></span> can be used. </p> </div> <div class="refsect1" title="Examples"> <a id="idp20138440"></a> <h2>Examples</h2> <p> Here is an example of the filevalid opcode. It uses the file <a class="ulink" href="examples/filevalid.csd" target="_top"><em class="citetitle">filevalid.csd</em></a>. </p> <div class="example"> <a id="idp20139432"></a> <p class="title"> <strong>Example 230. Example of the filevalid 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 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 filevalid.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="oblock">instr</span> 1 Sfile <span class="opc">strget</span> p4 ivld <span class="opc">filevalid</span> Sfile <span class="octrl">if</span> ivld<span class="op">></span>0 then asig <span class="opc">diskin2</span> Sfile, 1 <span class="opc">outs</span> asig, asig <span class="octrl">else</span> <span class="opc">printf_i</span> "Audiofile '<span class="op">%</span>s' does <span class="opc">not</span> exist!\n", 1, Sfile <span class="octrl">endif</span> <span class="oblock">endin</span> <span class="csdtag"></CsInstruments></span> <span class="csdtag"><CsScore></span> <span class="stamnt">i</span> 1 0 3 "frox.wav"<span class="comment">;file does not exist!!!</span> <span class="stamnt">i</span> 1 + 3 "fox.wav" <span class="comment">;but this one certainly does...</span> <span class="stamnt">e</span> <span class="csdtag"></CsScore></span> <span class="csdtag"></CsoundSynthesizer></span> </pre> </div> </div> <p><br class="example-break" /> The output should include a line like this: </p> <pre class="screen"> Audiofile 'frox.wav' does not exist! </pre> <p> </p> </div> <div class="refsect1" title="See Also"> <a id="idp20175096"></a> <h2>See Also</h2> <p> <a class="link" href="filebit.html" title="filebit"><em class="citetitle">filebit</em></a>, <a class="link" href="filelen.html" title="filelen"><em class="citetitle">filelen</em></a>, <a class="link" href="filenchnls.html" title="filenchnls"><em class="citetitle">filenchnls</em></a>, <a class="link" href="filepeak.html" title="filepeak"><em class="citetitle">filepeak</em></a>, <a class="link" href="filesr.html" title="filesr"><em class="citetitle">filesr</em></a> </p> </div> <div class="refsect1" title="Credits"> <a id="idp20178056"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: Matt Ingalls</td> </tr> <tr> <td>July 2010</td> </tr> </table> <p> </p> <p>New in Csound version 5.13</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="filesr.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="filter2.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">filesr </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> filter2</td> </tr> </table> </div> </body> </html>