[LAD] suil error: Unable to open UI library

[Phil CM]

On 15/10/14 20:17, Paul Davis wrote:
>
>
> On Wed, Oct 15, 2014 at 2:24 PM, Phil CM <philcm at gnu.org 
> <mailto:philcm at gnu.org>> wrote:
>
>     Hello LADs
>
>     I'm trying to make a GUI for a LV2 synth based on so-404. In fact,
>     I'm trying to learn C / C++.
>
>     I got everything to build OK, but I'm stuck on a hard to read
>     execution error ; when I load the plugin in jalv, it loads it OK,
>     but fails to load the UI and says :
>
>     suil error: Unable to open UI library
>     /usr/local/lib/lv2/kis.lv2/kis_gui.so
>     (/usr/local/lib/lv2/kis.lv2/kis_gui.so: undefined symbol:
>     _Z17instantiateSO_404PK15_LV2_DescriptordPKcPKPK12_LV2_Feature)
>
>
>
> % echo _Z17instantiateSO_404PK15_LV2_DescriptordPKcPKPK12_LV2_Feature 
> | c++filt
Wow, now that is a nice tool, thanks (a /lot/) for the tip!
> instantiateSO_404(_LV2_Descriptor const*, double, char const*, 
> _LV2_Feature const* const*)
> %
>
> your plugin is missing a symbol (instantiateSO_404(...)), apparently.
In my kis.h file, required in my kis.c file, I have this

LV2_Handle instantiateSO_404(const LV2_Descriptor *descriptor,double 
s_rate, const char *path,const LV2_Feature * const* features);

static LV2_Descriptor kis_Descriptor= {
     .URI="https://bitbucket.org/xaccrocheur/kis",
.instantiate=instantiateSO_404,
     .connect_port=connectPortSO_404,
     .activate=NULL,
     .run=runSO_404,
     .deactivate=NULL,
     .cleanup=cleanupSO_404,
     .extension_data=NULL,
};

And in the kis.c file is a

LV2_Handle instantiateSO_404(const LV2_Descriptor* descriptor,double 
s_rate, const char *path,const LV2_Feature * const* features) {
   so_404* so=malloc(sizeof(so_404));
   LV2_URI_Map_Feature *map_feature;
   const LV2_Feature * const *  ft;
   for (ft = features; *ft; ft++) {
     if (!strcmp((*ft)->URI, "http://lv2plug.in/ns/ext/uri-map")) {
       map_feature = (*ft)->data;
       so->midi_event_id = map_feature->uri_to_id(
map_feature->callback_data,
"http://lv2plug.in/ns/ext/event",
"http://lv2plug.in/ns/ext/midi#MidiEvent");
     } else if (!strcmp((*ft)->URI, "http://lv2plug.in/ns/ext/event")) {
       so->event_ref = (*ft)->data;
     }
   }

   puts( "SO-404 v.1.2 by 50m30n3 2009-2011" );

   so->phase = 0.0;
   so->freq = 440.0;
   so->tfreq = 440.0;
   so->amp = 0.0;
   so->env=0.0;
   so->vel=0;
   so->fcutoff = 0.0;
   so->fspeed = 0.0;
   so->fpos = 0.0;
   so->lastsample = 0.0;
   so->noteson = 0;
   so->cdelay = s_rate/100;
   so->samplerate=s_rate;

   so->release = 100;
   so->cutoff = 50;
   so->envmod = 80;
   so->resonance = 100;
   so->volume = 100;
   so->portamento = 64;

   return so;
}

And in the gui file, indeed :

static LV2UI_Descriptor descriptors[] = {
     {KIS_UI_URI, instantiate, cleanup, port_event, extension_data}
};

const LV2UI_Descriptor * lv2ui_descriptor(uint32_t index) {
     printf("lv2ui_descriptor(%u) called\n", (unsigned int)index);
     if (index >= sizeof(descriptors) / sizeof(descriptors[0])) {
         return NULL;
     }
return descriptors + index;
     // return NULL;
}

How does that work?

  * Is the UI always supposed to return the instantiate handle?
  * How is it supposed to return it?


Thanks a lot,

--Phil

>
>
>
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