Hi Iain, 

It doesn't look like you have the code to actually register with
Csound your opcodes in the library.  The simple way to do that is to
add the LINKAGE macro after the OENTRY localops[] line. (LINKAGE is
defined in csdl.h)

steven


On 9/2/05, Iain Duncan <iainduncan@telus.net> wrote:
> I have been following Victor's excellently written tutorial on making
> opcodes. This does need to be updated on csounds.com as it uses ENVIRON
> instead of CSOUND in the example, dunno about other changes.
> 
> I seem to have compiled my opcode and made a shared library ok ( myop.so
> ), but I get a no legal opcode error when I try to use it. Do I perhaps
> need to register it differently now? Or do something to make csound find
> it? I tried putting it in the root csound5 directory, the Plugins
> directory, and the Opcodes directory.
> 
> In the bottom of my C source file I have the registration copied from
> the tutorial:
> 
> // stuff to register opcode
> static OENTRY localops[] =
> { "myop", sizeof(myop), 3, "k", "k", (SUBR)myop_init,
> (SUBR)myop_process_k, NULL };
> 
> Is this perhaps different now, or is this supposed to be somewhere else?
> Attached is the C file.
> 
> Thanks
> Iain
> 
> 
> // attempt at my first opcode
> // doubles an input signal ( just to make it do something )
> 
> #include "csdl.h"
> 
> // structure definition for my opcode
> typedef struct _myop {
>         OPDS    h;
>         MYFLT   *in;
>         MYFLT   *out;
>         MYFLT   var;
> 
> } myop;
> 
> // init function for my opcode, initialize internal vars here
> int myop_init ( CSOUND *csound, myop *op )
> {
>         // initialize my internal variables here
>         op->var = 2;
> 
>         // opcode initialization is expected to return OK
>         return OK;
> }
> 
> // a krate process needs to return just one sample
> int myop_process_k ( CSOUND *csound, myop *op )
> {
>         // make our output variable
>         MYFLT result = *(op->in) * op->var;
>         *(op->out) = result;
> 
>         return OK;
> }
> 
> 
> // stuff to register opcode
> static OENTRY localops[] =
> { "myop", sizeof(myop), 3, "k", "k", (SUBR)myop_init, (SUBR)myop_process_k, NULL };
> 
> 
> 
> 
> 
> 
>


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