mirror of
https://github.com/cookiengineer/audacity
synced 2025-05-11 14:41:06 +02:00
157 lines
3.9 KiB
C
157 lines
3.9 KiB
C
#include "stdio.h"
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#ifndef mips
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#include "stdlib.h"
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#endif
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#include "xlisp.h"
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#include "sound.h"
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#include "falloc.h"
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#include "cext.h"
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#include "nyq-osc-server.h"
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#include "sliderdata.h"
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#include "sndsliders.h"
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LVAL xslider_read(void)
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{
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LVAL arg = xlgafixnum();
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int index = getfixnum(arg);
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xllastarg();
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if (index >= 0 && index < SLIDERS_MAX) {
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return cvflonum(slider_array[index]);
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}
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return NIL;
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}
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LVAL xosc_enable(void)
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{
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/* only need arg if OSC is defined, otherwise compiler complains */
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#ifdef OSC
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LVAL arg =
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#endif
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xlgetarg();
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xllastarg();
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#ifdef OSC
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if (nosc_enabled == !null(arg)) {
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return arg; /* no change */
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} else if (null(arg)) { /* nosc_enabled must be true */
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nosc_finish();
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return s_true;
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} else { /* nosc_enabled must be false */
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nosc_init();
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return NIL;
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}
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#else
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return xlenter("DISABLED");
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#endif
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}
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void slider_free();
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typedef struct slider_susp_struct {
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snd_susp_node susp;
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long terminate_cnt;
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int index;
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} slider_susp_node, *slider_susp_type;
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void slider__fetch(snd_susp_type a_susp, snd_list_type snd_list)
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{
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slider_susp_type susp = (slider_susp_type) a_susp;
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int cnt = 0; /* how many samples computed */
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int togo;
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int n;
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sample_block_type out;
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register sample_block_values_type out_ptr;
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register sample_block_values_type out_ptr_reg;
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register sample_type c_reg;
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int limit = ((long) susp->susp.sr) / 50;
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falloc_sample_block(out, "slider__fetch");
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out_ptr = out->samples;
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snd_list->block = out;
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/* compute no more than 20ms to preserve some interactivity */
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if (limit < 1) limit = 1;
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if (limit > max_sample_block_len) limit = max_sample_block_len;
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while (cnt < limit) { /* outer loop */
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/* first compute how many samples to generate in inner loop: */
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/* don't overflow the output sample block: */
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togo = limit - cnt;
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/* don't run past terminate time */
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if (susp->terminate_cnt != UNKNOWN &&
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susp->terminate_cnt <= susp->susp.current + cnt + togo) {
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togo = susp->terminate_cnt - (susp->susp.current + cnt);
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if (togo == 0) break;
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}
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n = togo;
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c_reg = slider_array[susp->index];
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out_ptr_reg = out_ptr;
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if (n) do { /* the inner sample computation loop */
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*out_ptr_reg++ = c_reg;
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} while (--n); /* inner loop */
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out_ptr += togo;
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cnt += togo;
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} /* outer loop */
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/* printf("slider %d cnt %d\n", susp->index, cnt); */
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/* test for termination */
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if (togo == 0 && cnt == 0) {
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snd_list_terminate(snd_list);
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} else {
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snd_list->block_len = cnt;
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susp->susp.current += cnt;
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}
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} /* slider__fetch */
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void slider_free(snd_susp_type a_susp)
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{
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slider_susp_type susp = (slider_susp_type) a_susp;
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ffree_generic(susp, sizeof(slider_susp_node), "slider_free");
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}
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void slider_print_tree(snd_susp_type susp, int n)
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{
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}
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sound_type snd_make_slider(int index, time_type t0, rate_type sr, time_type d)
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{
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register slider_susp_type susp;
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/* sr specified as input parameter */
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/* t0 specified as input parameter */
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sample_type scale_factor = 1.0F;
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if (index < 0 || index >= SLIDERS_MAX) {
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xlerror("slider index out of range", NIL);
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}
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falloc_generic(susp, slider_susp_node, "snd_make_slider");
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susp->susp.fetch = slider__fetch;
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susp->index = index;
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susp->terminate_cnt = round((d) * sr);
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/* initialize susp state */
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susp->susp.free = slider_free;
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susp->susp.sr = sr;
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susp->susp.t0 = t0;
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susp->susp.mark = NULL;
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susp->susp.print_tree = slider_print_tree;
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susp->susp.name = "slider";
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susp->susp.log_stop_cnt = UNKNOWN;
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susp->susp.current = 0;
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return sound_create((snd_susp_type)susp, t0, sr, scale_factor);
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}
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sound_type snd_slider(int index, time_type t0, rate_type sr, time_type d)
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{
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return snd_make_slider(index, t0, sr, d);
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}
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