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#ifndef _SIG_H
#define _SIG_H
#include <stdarg.h>
#include <stddef.h>
typedef struct sig_t sig_t;
typedef struct sig_ops_t {
size_t (*size)(va_list ap); /* return size of space needed for context for given ap */
void (*init)(void *context, va_list ap); /* initialize context w/given ap */
void (*destroy)(void *context); /* destroy initialized context */
float (*output)(void *context, unsigned ticks_ms); /* output a value 0-1 from context appropriate @ time ticks_ms */
} sig_ops_t;
sig_t * sig_new(const sig_ops_t *ops, ...);
sig_t * sig_free(sig_t *sig);
float sig_output(sig_t *sig, unsigned ticks_ms);
extern sig_ops_t sig_ops_const;
extern sig_ops_t sig_ops_sin;
/* TODO:
extern sig_ops_t sig_ops_tri;
extern sig_ops_t sig_ops_saw;
extern sig_ops_t sig_ops_sqr;
*/
extern sig_ops_t sig_ops_lerp;
extern sig_ops_t sig_ops_mult;
#endif
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