int sporth_delay(sporth_stack *stack, void *ud)
{
plumber_data *pd = ud;
SPFLOAT input;
SPFLOAT out;
SPFLOAT time;
SPFLOAT feedback;
sp_delay *delay;
switch(pd->mode) {
case PLUMBER_CREATE:
#ifdef DEBUG_MODE
fprintf(stderr, "delay: Creating\n");
#endif
sp_delay_create(&delay);
plumber_add_ugen(pd, SPORTH_DELAY, delay);
if(sporth_check_args(stack, "fff") != SPORTH_OK) {
fprintf(stderr,"Not enough arguments for delay\n");
stack->error++;
return PLUMBER_NOTOK;
}
time = sporth_stack_pop_float(stack);
feedback = sporth_stack_pop_float(stack);
input = sporth_stack_pop_float(stack);
sporth_stack_push_float(stack, 0);
break;
case PLUMBER_INIT:
#ifdef DEBUG_MODE
fprintf(stderr, "delay: Initialising\n");
#endif
time = sporth_stack_pop_float(stack);
feedback = sporth_stack_pop_float(stack);
input = sporth_stack_pop_float(stack);
delay = pd->last->ud;
sp_delay_init(pd->sp, delay, time);
sporth_stack_push_float(stack, 0);
break;
case PLUMBER_COMPUTE:
time = sporth_stack_pop_float(stack);
feedback = sporth_stack_pop_float(stack);
input = sporth_stack_pop_float(stack);
delay = pd->last->ud;
delay->feedback = feedback;
sp_delay_compute(pd->sp, delay, &input, &out);
sporth_stack_push_float(stack, out);
break;
case PLUMBER_DESTROY:
delay = pd->last->ud;
sp_delay_destroy(&delay);
break;
default:
fprintf(stderr, "delay: Unknown mode!\n");
break;
}
return PLUMBER_OK;
}
void process(sp_data *sp, void *udata) {
UserData *ud = udata;
SPFLOAT osc = 0, delay = 0, met = 0, tenv = 0;
sp_metro_compute(sp, ud->met, NULL, &met);
sp_tenv_compute(sp, ud->tenv, &met, &tenv);
if(met) {
ud->osc->freq = 100 + rand() % 500;
}
sp_osc_compute(sp, ud->osc, NULL, &osc);
osc *= tenv;
sp_delay_compute(sp, ud->delay, &osc, &delay);
sp->out[0] = osc + delay;
}
int t_delay(sp_test *tst, sp_data *sp, const char *hash)
{
uint32_t n;
int fail = 0;
SPFLOAT osc = 0, delay = 0, met = 0, tenv = 0;
UserData ud;
sp_delay_create(&ud.delay);
sp_osc_create(&ud.osc);
sp_ftbl_create(sp, &ud.ft, 2048);
sp_metro_create(&ud.met);
sp_tenv_create(&ud.tenv);
sp_delay_init(sp, ud.delay, 0.75 * 0.5);
ud.delay->feedback = 0.5;
sp_gen_sine(sp, ud.ft);
sp_osc_init(sp, ud.osc, ud.ft, 0);
ud.osc->amp = 0.5;
sp_metro_init(sp, ud.met);
ud.met->freq = 1;
sp_tenv_init(sp, ud.tenv);
ud.tenv->atk = 0.005;
ud.tenv->hold = 0.1;
ud.tenv->rel = 0.1;
for(n = 0; n < tst->size; n++) {
osc = 0, delay = 0, met = 0, tenv = 0;
sp_metro_compute(sp, ud.met, NULL, &met);
sp_tenv_compute(sp, ud.tenv, &met, &tenv);
if(met) {
ud.osc->freq = 100 + sp_rand(sp) % 500;
}
sp_osc_compute(sp, ud.osc, NULL, &osc);
osc *= tenv;
sp_delay_compute(sp, ud.delay, &osc, &delay);
sp_test_add_sample(tst, osc + delay);
}
if(sp_test_compare(tst, hash) == SP_NOT_OK) {
printf("Generated hash %s does not match reference hash %s\n",
tst->md5string, hash);
fail = 1;
}
if(fail) return SP_NOT_OK;
else return SP_OK;
}