I have written this solution only to avoid a crash,
I believed that it was the problem

On Tue, Feb 14, 2012 at 10:45:33PM +0100, joachim heintz wrote:
> hi tito -
> i think this does not work without an error; see below.
> or am i missing something?
> 	joachim
> 
> <CsoundSynthesizer>
> <CsInstruments>
> sr     = 44100
> ksmps  = 64
> nchnls = 1
> 
> ;; filevalid for csound < 5.13 (tested with 5.07)
> opcode filevalid2, i, S
>   Sfile xin
>   ires ftgen 2012, 0, 2, 1, Sfile, 0, 0, 0
>   xout ires - 2011
> endop
> 
> instr 1
> Sfile = "dindondan.wav"
> ires filevalid2 Sfile
> if (ires != 1) igoto end
> aout soundin Sfile
> out aout
> end:
> if (ires != 1) then
>   turnoff
> endif
> endin
> </CsInstruments>
> <CsScore>
> i1 0 1
> e
> </CsScore>
> </CsoundSynthesizer>
> 
> 
> 
> orch now loaded
> audio buffered in 256 sample-frame blocks
> ALSA input: total buffer size: 1024, period size: 256
> reading 512-byte blks of shorts from adc (RAW)
> ALSA output: total buffer size: 1024, period size: 256
> writing 256 sample blks of 64-bit floats to dac
> SECTION 1:
> new alloc for instr 1:
> ftable 2012:
> soundin cannot open dindondan.wav
> ftable 2012: Failed to open file
> f2012     0.00     2.00     1.00  "dindondan.wav" ...
> INIT ERROR in instr 1 (opcode filevalid2): ftgen error
> ires	ftgen	2012	0	2	1	Sfile	0	0	0	
> 	  B  0.000 - note deleted.  i1 had 1 init errors
> Score finished in csoundPerformKsmps().
> inactive allocs returned to freespace
> end of score.		   overall amps:      0.0
> 	   overall samples out of range:        0
> 1 errors in performance
> Elapsed time at end of performance: real: 0.014s, CPU: 0.010s
> 0 256 sample blks of 64-bit floats written to dac
> 
> 
> Am 14.02.2012 10:22, schrieb Tito Latini:
> >> Unfortunately, I cannot count on python always being available.
> >>
> >> Can anyone suggest a simple solution using the system opcode - one that perhaps parallels "os.path.exists"?
> > 
> > The hidden filevalid
> > 
> > <CsoundSynthesizer>
> > <CsInstruments>
> > sr     = 44100
> > ksmps  = 64
> > nchnls = 1
> > 
> > ;; filevalid for csound < 5.13 (tested with 5.07)
> > opcode filevalid, i, S
> >   Sfile xin
> >   ires ftgen 2012, 0, 2, 1, Sfile, 0, 0, 0
> >   xout ires - 2011
> > endop
> > 
> > instr 1
> > Sfile = "dindondan.wav"
> > ires filevalid Sfile
> > if (ires != 1) igoto end
> > aout soundin Sfile
> > out aout
> > end:
> > if (ires != 1) then
> >   turnoff
> > endif
> > endin
> > </CsInstruments>
> > <CsScore>
> > i1 0 1
> > e
> > </CsScore>
> > </CsoundSynthesizer>
> > 
> > tito
> > 
> > 
> > Send bugs reports to the Sourceforge bug tracker
> >             https://sourceforge.net/tracker/?group_id=81968&atid=564599
> > Discussions of bugs and features can be posted here
> > To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
> > 
> > 
> 
> 
> Send bugs reports to the Sourceforge bug tracker
>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"