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#include <assert.h>
#include "sig.h"
typedef struct ops_expand_ctxt_t {
sig_t *value;
} ops_expand_ctxt_t;
static size_t ops_expand_size(va_list ap)
{
return sizeof(ops_expand_ctxt_t);
}
/* expects a single sig_t: value
* input range is assumed to be 0..1, outputs expanded
* range of -1..+1
*/
static void ops_expand_init(void *context, va_list ap)
{
ops_expand_ctxt_t *ctxt = context;
assert(ctxt);
ctxt->value = va_arg(ap, sig_t *);
}
static void ops_expand_destroy(void *context)
{
ops_expand_ctxt_t *ctxt = context;
assert(ctxt);
sig_free(ctxt->value);
}
static float ops_expand_output(void *context, unsigned ticks_ms)
{
ops_expand_ctxt_t *ctxt = context;
assert(ctxt);
return sig_output(ctxt->value, ticks_ms) * 2.f + 1.f;
}
sig_ops_t sig_ops_expand = {
.size = ops_expand_size,
.init = ops_expand_init,
.destroy = ops_expand_destroy,
.output = ops_expand_output,
};
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