Re: [Csnd-dev] Csound 7: csoundListChannels returns always 0

Hm,

in CsoundQt with the latest pull from Csound feature/newapi still the same
result:

controlChannelInfo_t *channelList;
int numChannels = csoundListChannels(ud->csound, &channelList);

the second lines sets channelList to 0x0 and returns 0 as numChannels.

When I build CsoundQt (the non modified code) agains Csound6, it returns
correct number of channels.

I need to go now but will think have closer look later. Maybe it is when
is  csoundStart() called.

tarmo





Kontakt vlz (<[email protected]>) kirjutas kuupäeval N, 5. september
2024 kell 10:59:

> I tested it here and it is working. See the test program
>
> const char *code =
>   "0dbfs = 1              \n"
>   "chn_k \"pitch\",3  \n"
>   "instr 1                \n"
>   "kp chnget \"pitch\"    \n"
>   "a1 expon p4,p3,0.001   \n"
>   "a2 oscil a1,cpsmidinn(p5)*kp\n"
>   "    out a2             \n"
>   "endin                  \n";
>
> int main(int argc, const char *argv[]) {
>   /* Create the Csound engine instance */
>   CSOUND *csound = csoundCreate(NULL, NULL);
>
>   if(csound != NULL) {
>     int res = CSOUND_SUCCESS, i;
>     /* Set options checking for any errors */
>     for(i = 1; i < argc; i++)
>       res += csoundSetOption(csound, argv[i]);
>     if(res == CSOUND_SUCCESS) {
>       /* Compile code from string, synchronously */
>       res = csoundCompileOrc(csound, code, 0);
>       if(res == CSOUND_SUCCESS) {
>         char evt[64];
>         MYFLT dur = 5.;
>         MYFLT pitch = 1., incr = 1./(dur*csoundGetKr(csound));
>         /* Start engine */
>         res = csoundStart(csound);
>         controlChannelInfo_t *list;
>         int chn = csoundListChannels(csound, &list);
>         csoundMessage(csound, "%d channels\n", chn);
>         /* send realtine event, synchronously */
>         snprintf(evt, 64, "i1 0 %f 0.1 60\n", dur);
>         csoundEventString(csound, evt, 0);
>        /* compute audio blocks */
>         csoundPerformKsmps(csound);
>         while(res == CSOUND_SUCCESS) {
>           csoundSetControlChannel(csound, "pitch", pitch);
>           res = csoundPerformKsmps(csound);
>           pitch += incr;
>           if(pitch > 2)
>            csoundEventString(csound, "e 0", 0);
>         }
>       }
>     }
>     /* Destroy the engine instance */
>     csoundDestroy(csound);
>     return 0;
>   }
>   return -1;
> }
>
> It prints
>
> SECTION 1:
> 1 channels
> new alloc for instr 1:
>   T  5.000 TT  5.000 M:  0.09989
> End of Performance inactive allocs returned to freespace
>   overall amps:  0.09989
>   overall samples out of range:        0
> 0 errors in performance
>
>
> > On 5 Sep 2024, at 08:06, Tarmo Johannes <[email protected]> wrote:
> >
> > Hi,
> >
> > This is mostly meant for Victor:
> >
> > Testing CsoundQt with Csound7 I discovered that the inital values are
> not read any more from the widgets, chnget returns 0 until the the widget
> is moved.
> >
> > CsoudnQt goes through the channels declared with chn_k/chn_S and puts a
> value read from according widgets into the channels.
> > see
> https://github.com/CsoundQt/CsoundQt/blob/5ca6f63a11a470575bc53fcdc3629cd8079df2b4/src/csoundengine.cpp#L1062
> >
> > The problem is that with Csound 7 (built from feature/newapi Augus 30)
> >
> > csoundListChannels()
> >
> > returns always 0, although there are declared channels:
> >
> > controlChannelInfo_t *channelList;
> > int numChannels = csoundListChannels(ud->csound, &channelList);
> >
> > What has changed? Might be that I need to implement it differently on
> CsoundQt side.
> >
> > Should I file a bug report?
> >
> > tarmo
>