Autres/audacity
1
0
Fork 0
mirror of https://github.com/cookiengineer/audacity synced 2026-01-13 08:05:52 +01:00
Code Issues Releases Wiki Activity

Update Nyquist to v3.09.

Browse Source
This commit is contained in:
Leland Lucius
2015-04-07 22:10:17 -05:00
parent f88b27e6d8
commit 9fb0ce5b82
358 changed files with 26327 additions and 7043 deletions
Download Patch File Download Diff File Expand all files Collapse all files

159
lib-src/libnyquist/nyquist/tran/biquadfilt.c
View File

@@ -9,7 +9,7 @@
#include "cext.h"
#include "biquadfilt.h"
void biquadfilt_free();
void biquadfilt_free(snd_susp_type a_susp);
typedef struct biquadfilt_susp_struct {
@@ -30,8 +30,9 @@ typedef struct biquadfilt_susp_struct {
} biquadfilt_susp_node, *biquadfilt_susp_type;
void biquadfilt_n_fetch(register biquadfilt_susp_type susp, snd_list_type snd_list)
void biquadfilt_n_fetch(snd_susp_type a_susp, snd_list_type snd_list)
{
biquadfilt_susp_type susp = (biquadfilt_susp_type) a_susp;
int cnt = 0; /* how many samples computed */
int togo;
int n;
@@ -65,6 +66,7 @@ void biquadfilt_n_fetch(register biquadfilt_susp_type susp, snd_list_type snd_li
if (susp->terminate_cnt != UNKNOWN &&
susp->terminate_cnt <= susp->susp.current + cnt + togo) {
togo = susp->terminate_cnt - (susp->susp.current + cnt);
if (togo < 0) togo = 0; /* avoids rounding errros */
if (togo == 0) break;
}
@@ -76,6 +78,7 @@ void biquadfilt_n_fetch(register biquadfilt_susp_type susp, snd_list_type snd_li
* AND cnt > 0 (we're not at the beginning of the
* output block).
*/
if (to_stop < 0) to_stop = 0; /* avoids rounding errors */
if (to_stop < togo) {
if (to_stop == 0) {
if (cnt) {
@@ -104,9 +107,9 @@ void biquadfilt_n_fetch(register biquadfilt_susp_type susp, snd_list_type snd_li
s_ptr_reg = susp->s_ptr;
out_ptr_reg = out_ptr;
if (n) do { /* the inner sample computation loop */
double z0; z0 = *s_ptr_reg++ + a1_reg*z1_reg + a2_reg*z2_reg;
*out_ptr_reg++ = (sample_type) (z0*b0_reg + z1_reg*b1_reg + z2_reg*b2_reg);
z2_reg = z1_reg; z1_reg = z0;;
double z0; z0 = *s_ptr_reg++ + a1_reg*z1_reg + a2_reg*z2_reg;
*out_ptr_reg++ = (sample_type) (z0*b0_reg + z1_reg*b1_reg + z2_reg*b2_reg);
z2_reg = z1_reg; z1_reg = z0;
} while (--n); /* inner loop */
susp->z1 = z1_reg;
@@ -134,116 +137,9 @@ double z0; z0 = *s_ptr_reg++ + a1_reg*z1_reg + a2_reg*z2_reg;
} /* biquadfilt_n_fetch */
void biquadfilt_s_fetch(register biquadfilt_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 double z1_reg;
register double z2_reg;
register double b0_reg;
register double b1_reg;
register double b2_reg;
register double a1_reg;
register double a2_reg;
register sample_type s_scale_reg = susp->s->scale;
register sample_block_values_type s_ptr_reg;
falloc_sample_block(out, "biquadfilt_s_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 the s input sample block: */
susp_check_term_log_samples(s, s_ptr, s_cnt);
togo = min(togo, susp->s_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;
}
/* don't run past logical stop time */
if (!susp->logically_stopped && susp->susp.log_stop_cnt != UNKNOWN) {
int to_stop = susp->susp.log_stop_cnt - (susp->susp.current + cnt);
/* break if to_stop == 0 (we're at the logical stop)
* AND cnt > 0 (we're not at the beginning of the
* output block).
*/
if (to_stop < togo) {
if (to_stop == 0) {
if (cnt) {
togo = 0;
break;
} else /* keep togo as is: since cnt == 0, we
* can set the logical stop flag on this
* output block
*/
susp->logically_stopped = true;
} else /* limit togo so we can start a new
* block at the LST
*/
togo = to_stop;
}
}
n = togo;
z1_reg = susp->z1;
z2_reg = susp->z2;
b0_reg = susp->b0;
b1_reg = susp->b1;
b2_reg = susp->b2;
a1_reg = susp->a1;
a2_reg = susp->a2;
s_ptr_reg = susp->s_ptr;
out_ptr_reg = out_ptr;
if (n) do { /* the inner sample computation loop */
double z0; z0 = (s_scale_reg * *s_ptr_reg++) + a1_reg*z1_reg + a2_reg*z2_reg;
*out_ptr_reg++ = (sample_type) (z0*b0_reg + z1_reg*b1_reg + z2_reg*b2_reg);
z2_reg = z1_reg; z1_reg = z0;;
} while (--n); /* inner loop */
susp->z1 = z1_reg;
susp->z2 = z2_reg;
/* using s_ptr_reg is a bad idea on RS/6000: */
susp->s_ptr += togo;
out_ptr += togo;
susp_took(s_cnt, 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;
}
/* test for logical stop */
if (susp->logically_stopped) {
snd_list->logically_stopped = true;
} else if (susp->susp.log_stop_cnt == susp->susp.current) {
susp->logically_stopped = true;
}
} /* biquadfilt_s_fetch */
void biquadfilt_toss_fetch(susp, snd_list)
register biquadfilt_susp_type susp;
snd_list_type snd_list;
{
long final_count = susp->susp.toss_cnt;
void biquadfilt_toss_fetch(snd_susp_type a_susp, snd_list_type snd_list)
{
biquadfilt_susp_type susp = (biquadfilt_susp_type) a_susp;
time_type final_time = susp->susp.t0;
long n;
@@ -258,25 +154,28 @@ void biquadfilt_toss_fetch(susp, snd_list)
susp->s_ptr += n;
susp_took(s_cnt, n);
susp->susp.fetch = susp->susp.keep_fetch;
(*(susp->susp.fetch))(susp, snd_list);
(*(susp->susp.fetch))(a_susp, snd_list);
}
void biquadfilt_mark(biquadfilt_susp_type susp)
void biquadfilt_mark(snd_susp_type a_susp)
{
biquadfilt_susp_type susp = (biquadfilt_susp_type) a_susp;
sound_xlmark(susp->s);
}
void biquadfilt_free(biquadfilt_susp_type susp)
void biquadfilt_free(snd_susp_type a_susp)
{
biquadfilt_susp_type susp = (biquadfilt_susp_type) a_susp;
sound_unref(susp->s);
ffree_generic(susp, sizeof(biquadfilt_susp_node), "biquadfilt_free");
}
void biquadfilt_print_tree(biquadfilt_susp_type susp, int n)
void biquadfilt_print_tree(snd_susp_type a_susp, int n)
{
biquadfilt_susp_type susp = (biquadfilt_susp_type) a_susp;
indent(n);
stdputstr("s:");
sound_print_tree_1(susp->s, n);
@@ -288,9 +187,15 @@ sound_type snd_make_biquadfilt(sound_type s, double b0, double b1, double b2, do
register biquadfilt_susp_type susp;
rate_type sr = s->sr;
time_type t0 = s->t0;
int interp_desc = 0;
sample_type scale_factor = 1.0F;
time_type t0_min = t0;
/* combine scale factors of linear inputs (S) */
scale_factor *= s->scale;
s->scale = 1.0F;
/* try to push scale_factor back to a low sr input */
if (s->sr < sr) { s->scale = scale_factor; scale_factor = 1.0F; }
falloc_generic(susp, biquadfilt_susp_node, "snd_make_biquadfilt");
susp->z1 = z1init;
susp->z2 = z2init;
@@ -299,15 +204,7 @@ sound_type snd_make_biquadfilt(sound_type s, double b0, double b1, double b2, do
susp->b2 = b2;
susp->a1 = a1;
susp->a2 = a2;
/* select a susp fn based on sample rates */
interp_desc = (interp_desc << 2) + interp_style(s, sr);
switch (interp_desc) {
case INTERP_n: susp->susp.fetch = biquadfilt_n_fetch; break;
case INTERP_s: susp->susp.fetch = biquadfilt_s_fetch; break;
default: snd_badsr(); break;
}
susp->susp.fetch = biquadfilt_n_fetch;
susp->terminate_cnt = UNKNOWN;
/* handle unequal start times, if any */
if (t0 < s->t0) sound_prepend_zeros(s, t0);
@@ -316,8 +213,8 @@ sound_type snd_make_biquadfilt(sound_type s, double b0, double b1, double b2, do
/* how many samples to toss before t0: */
susp->susp.toss_cnt = (long) ((t0 - t0_min) * sr + 0.5);
if (susp->susp.toss_cnt > 0) {
susp->susp.keep_fetch = susp->susp.fetch;
susp->susp.fetch = biquadfilt_toss_fetch;
susp->susp.keep_fetch = susp->susp.fetch;
susp->susp.fetch = biquadfilt_toss_fetch;
}
/* initialize susp state */