alpasscv.alg

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(ALPASSCV-ALG
(NAME "alpasscv")
(ARGUMENTS ("sound_type" "input") ("time_type" "delay") ("sound_type" "feedback"))
(START (MAX input feedback))
(STATE ("long" "delaylen" "MAX(1, round(input->sr * delay))")
       ("sample_type *" "delaybuf"
               "(sample_type *) calloc (susp->delaylen, sizeof(sample_type))")
       ("sample_type *" "delayptr" "susp->delaybuf")
       ("sample_type *" "endptr" "susp->delaybuf + susp->delaylen"))
(CONSTANT "delaylen" "endptr")
(NOT-REGISTER delaybuf)
(LINEAR input)
(TERMINATE (MIN input))
(INNER-LOOP-LOCALS "register sample_type y, z, fb;\n")
(INNER-LOOP "	    y = *delayptr;
        *delayptr++ = z = (sample_type) ((fb = feedback) * y + input);
        output = (sample_type) (y - fb * z);
        if (delayptr >= endptr) delayptr = susp->delaybuf;")
(FINALIZATION "free(susp->delaybuf);")
)