#include <stdlib.h>

#include <xas/synth.h>

xas_synth *xas_synth_new(size_t sample_rate,
                             xas_synth_callback_sample  sample,
                             xas_synth_callback_destroy destroy,
                             void *ctx) {
    xas_synth *synth;

    if ((synth = malloc(sizeof(*synth))) == NULL) {
        goto error_malloc_synth;
    }

    synth->sample_rate = sample_rate;
    synth->sample      = sample;
    synth->destroy     = destroy;
    synth->ctx         = ctx;

    return synth;

error_malloc_synth:
    return NULL;
}

void xas_synth_destroy(xas_synth *synth) {
    if (synth->destroy) {
        synth->destroy(synth, synth->ctx);
    }
}

int16_t xas_synth_sample(xas_synth *synth) {
   return synth->sample(synth, synth->ctx);
}

ssize_t xas_synth_fill(xas_synth *synth,
                         int16_t *samples,
                         size_t count) {
    size_t i;

    for (i=0; i<count; i++) {
        samples[i] = synth->sample(synth, synth->ctx);
    }

    return count;
}