bitpwm

Creates a pulse wavetable with configurable width. Designed to be fed into an instance of bitosc as a wavetable parameter.

The bitpwm itself takes in two paramters: position and wavetable size. Presumably, the size is the same size as the wavetable size in bitosc.

#include <math.h>
#include "graforge.h"
static int tick = 1;
static void compute(gf_node *node)
{
    int blksize;
    gf_cable *c[3];
    int n;

    blksize = gf_node_blksize(node);

    for (n = 0; n < 3; n++) {
        gf_node_get_cable(node, n, &c[n]);
    }

    for (n = 0; n < blksize; n++) {
        int sz;
        GFFLT pos;
        int ipos;
        unsigned long out;

        pos = gf_cable_get(c[0], n);
        sz = floor(gf_cable_get(c[1], n));

        ipos = floor(pos * sz);

        if (ipos == sz) ipos--;

        out = (1 << ipos) - 1;
        if (tick) {
            printf("out: %ld\n", out);
            tick = 0;
        }

        gf_cable_set(c[2], n, (GFFLT)out);
    }
}

int node_bitpwm(gf_node *node)
{
    gf_node_cables_alloc(node, 3);
    gf_node_set_block(node, 2);
    gf_node_set_compute(node, compute);
    return GF_OK;
}

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