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#include "stdio.h"
#ifndef mips
#include "stdlib.h"
#endif
#include "xlisp.h"
#include "sound.h"
#include "falloc.h"
#include "cext.h"
#include "const.h"
void const_free();
typedef struct const_susp_struct {
snd_susp_node susp;
long terminate_cnt;
sample_type c;
} const_susp_node, *const_susp_type;
void const__fetch(register const_susp_type susp, snd_list_type snd_list)
{
int cnt = 0; /* how many samples computed */
int togo;
int n;
sample_block_type out;
register sample_block_values_type out_ptr;
register sample_block_values_type out_ptr_reg;
register sample_type c_reg;
falloc_sample_block(out, "const__fetch");
out_ptr = out->samples;
snd_list->block = out;
while (cnt < max_sample_block_len) { /* outer loop */
/* first compute how many samples to generate in inner loop: */
/* don't overflow the output sample block: */
togo = max_sample_block_len - cnt;
/* don't run past terminate time */
if (susp->terminate_cnt != UNKNOWN &&
susp->terminate_cnt <= susp->susp.current + cnt + togo) {
togo = susp->terminate_cnt - (susp->susp.current + cnt);
if (togo == 0) break;
}
n = togo;
c_reg = susp->c;
out_ptr_reg = out_ptr;
if (n) do { /* the inner sample computation loop */
*out_ptr_reg++ = c_reg;
} while (--n); /* inner loop */
out_ptr += togo;
cnt += togo;
} /* outer loop */
/* test for termination */
if (togo == 0 && cnt == 0) {
snd_list_terminate(snd_list);
} else {
snd_list->block_len = cnt;
susp->susp.current += cnt;
}
} /* const__fetch */
void const_free(const_susp_type susp)
{
ffree_generic(susp, sizeof(const_susp_node), "const_free");
}
void const_print_tree(const_susp_type susp, int n)
{
}
sound_type snd_make_const(double c, time_type t0, rate_type sr, time_type d)
{
register const_susp_type susp;
/* sr specified as input parameter */
/* t0 specified as input parameter */
sample_type scale_factor = 1.0F;
falloc_generic(susp, const_susp_node, "snd_make_const");
susp->c = (sample_type) c;
susp->susp.fetch = const__fetch;
susp->terminate_cnt = round((d) * sr);
/* initialize susp state */
susp->susp.free = const_free;
susp->susp.sr = sr;
susp->susp.t0 = t0;
susp->susp.mark = NULL;
susp->susp.print_tree = const_print_tree;
susp->susp.name = "const";
susp->susp.log_stop_cnt = UNKNOWN;
susp->susp.current = 0;
return sound_create((snd_susp_type)susp, t0, sr, scale_factor);
}
sound_type snd_const(double c, time_type t0, rate_type sr, time_type d)
{
return snd_make_const(c, t0, sr, d);
}
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