filevalid — Checks that a file can be read at initialisation or performance time.
ifilcod -- sound file to be queried
ir -- return code (1 if the sound file ifilcod can be read).
Here is an example of the filevalid opcode. It uses the file filevalid.csd.
Example 301. 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!