filevalid
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## filevalid

filevalid — Checks that a file can be read at initialisation or performance time.

## Description

Returns 1 if the sound file exists and is readable, or 0 if not.

## Syntax

    ir filevalid ifilcod

    kr filevalid ifilcod

## Initialization

ifilcod -- sound file to be queried

ir -- return code (1 if the sound file ifilcod can be read).

## Performance

kr -- return code (1 if the sound file ifilcod can be read).

## Examples

Here is an example of the filevalid opcode. It uses the file filevalid.csd.

Example 303. Example of the filevalid opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

    <CsoundSynthesizer>
    <CsOptions>
    ; Select audio/midi flags here according to platform
    -odac     ;;;realtime audio out
    ;-iadc    ;;;uncomment -iadc if realtime audio input is needed too
    ; For Non-realtime ouput leave only the line below:
    ;-o filevalid.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    sr = 44100
    ksmps = 32
    nchnls = 2
    0dbfs = 1

    instr 1
    Sfile     strget    p4
    ivld      filevalid Sfile

    if ivld>0 then
    asig      diskin2   Sfile, 1
              outs      asig, asig
    else
              printf_i  "Audiofile '%s' does not exist!\n", 1, Sfile
    endif
    endin

    </CsInstruments>
    <CsScore>

    i 1 0 3 "frox.wav";file does not exist!!!
    i 1 + 3 "fox.wav" ;but this one certainly does...

    e
    </CsScore>
    </CsoundSynthesizer>

The output should include a line like this:

    Audiofile 'frox.wav' does not exist!

## See also

Sound File Queries

## Credits

Author: Matt Ingalls
July 2010

New in Csound version 5.13

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