/* --------------- signals ----------------------------------- */

#define MAXLOGSIG 13
#define MAXSIGSIZE (1 << MAXLOGSIG)

#ifndef SAMPLE_TYPEDEF
typedef int t_int;
typedef float t_sample, t_float;
#define SAMPLE_TYPEDEF
#endif

typedef struct _signal
{
    long s_n;
    t_sample *s_vec;
    float s_sr;
    struct _signal *s_next;
    struct _signal *s_nextused;
    short s_refcount;
    short s_size;					// element size (* s_n == memory)
#ifdef ALTIVEC_ATTEMPT
    char *s_ptr;					// what to free
#endif
} t_signal;

typedef struct _dspchain
{
	t_object c_ob;
	t_int *c_chain;
	long c_chainsize;
	long c_callcount;
	long c_usedcount;
	long c_reusedcount;
	long c_freedcount;
	long c_sr;
	long c_bs;
	t_signal *c_usedlist;
	t_signal *c_freelist;
	t_signal *c_zero;
	struct _ugenbox *c_ugenlist;	// temporary variable, allows reentrant compiling
	struct _dspchain *c_prev;
	void *c_patcher;	// top-level parent or 0 if global
	void *c_inlets;		// collection of inlets
	void *c_outlets;	// collection of outlets
	t_signal *c_inputs;		// signal input list (zero before first exec)
	t_signal *c_outputs; 	// signal output list
	// have to determine whether freelist is global or local
	long c_broken;		// object being freed, don't run it
} t_dspchain;

typedef t_int *(*t_perfroutine)(t_int *args);

t_int *plus_perform(t_int *args);
t_int *sig_perform(t_int *args);
t_int *copy_perform(t_int *args);
t_int *plus2_perform(t_int *w);

int sys_getblksize(void);
float sys_getsr(void);
int sys_getch(void);

void dsp_add(t_perfroutine f, int n, ...);

t_dspchain *dspchain_start(long bs, long sr);
t_dspchain *dspchain_get(void);
t_dspchain *dspchain_compile(struct patcher *p, long bs, long sr);
void dspchain_tick(t_dspchain *c);