diff options
Diffstat (limited to 'src/libs/sig/ops_max.c')
-rw-r--r-- | src/libs/sig/ops_max.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/libs/sig/ops_max.c b/src/libs/sig/ops_max.c new file mode 100644 index 0000000..9065027 --- /dev/null +++ b/src/libs/sig/ops_max.c @@ -0,0 +1,62 @@ +#include <assert.h> + +#include "sig.h" + + +typedef struct ops_max_ctxt_t { + sig_t *a, *b; +} ops_max_ctxt_t; + + +static size_t ops_max_size(va_list ap) +{ + return sizeof(ops_max_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_max_init(void *context, va_list ap) +{ + ops_max_ctxt_t *ctxt = context; + + assert(ctxt); + + ctxt->a = va_arg(ap, sig_t *); + ctxt->b = va_arg(ap, sig_t *); +} + + +static void ops_max_destroy(void *context) +{ + ops_max_ctxt_t *ctxt = context; + + assert(ctxt); + + sig_free(ctxt->a); + sig_free(ctxt->b); +} + + +static float ops_max_output(void *context, unsigned ticks_ms) +{ + ops_max_ctxt_t *ctxt = context; + float a, b; + + assert(ctxt); + + a = sig_output(ctxt->a, ticks_ms); + b = sig_output(ctxt->b, ticks_ms); + + return a > b ? a : b; +} + + +sig_ops_t sig_ops_max = { + .size = ops_max_size, + .init = ops_max_init, + .destroy = ops_max_destroy, + .output = ops_max_output, +}; |