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#include <assert.h>
#include "sig.h"
typedef struct ops_mult_ctxt_t {
sig_t *a, *b;
} ops_mult_ctxt_t;
static size_t ops_mult_size(va_list ap)
{
return sizeof(ops_mult_ctxt_t);
}
/* supply two sig_t's to be multiplied, this sig_t takes
* ownership of them so they'll be freed by the multiplier
* on destroy when that sig_t is freed.
*/
static void ops_mult_init(void *context, va_list ap)
{
ops_mult_ctxt_t *ctxt = context;
assert(ctxt);
ctxt->a = va_arg(ap, sig_t *);
ctxt->b = va_arg(ap, sig_t *);
}
static void ops_mult_destroy(void *context)
{
ops_mult_ctxt_t *ctxt = context;
assert(ctxt);
sig_free(ctxt->a);
sig_free(ctxt->b);
}
static float ops_mult_output(void *context, unsigned ticks_ms)
{
ops_mult_ctxt_t *ctxt = context;
assert(ctxt);
return sig_output(ctxt->a, ticks_ms) * sig_output(ctxt->b, ticks_ms);
}
sig_ops_t sig_ops_mult = {
.size = ops_mult_size,
.init = ops_mult_init,
.destroy = ops_mult_destroy,
.output = ops_mult_output,
};
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