cpc_set_sample
if (cpc_set_sample(cpc, this, *data1) != 0)
if (cpc_set_sample(cpc, this, *scratch) != 0)
cpc_set_sample(cpc, set, *data2) != 0) {
if (cpc_set_sample(cpc, set, *scratch) == 0) {
if (cpc_set_sample(cpc, this, *data1) != 0)
if (cpc_set_sample(cpc, this, *scratch) != 0)
extern int cpc_set_sample(cpc_t *cpc, cpc_set_t *set, cpc_buf_t *buf);