mirror of
https://github.com/cookiengineer/audacity
synced 2025-10-31 22:23:54 +01:00
589 lines
18 KiB
C
589 lines
18 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 "resonvc.h"
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void resonvc_free();
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typedef struct resonvc_susp_struct {
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snd_susp_node susp;
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boolean started;
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long terminate_cnt;
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boolean logically_stopped;
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sound_type s1;
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long s1_cnt;
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sample_block_values_type s1_ptr;
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sound_type hz;
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long hz_cnt;
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sample_block_values_type hz_ptr;
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/* support for interpolation of hz */
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sample_type hz_x1_sample;
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double hz_pHaSe;
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double hz_pHaSe_iNcR;
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/* support for ramp between samples of hz */
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double output_per_hz;
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long hz_n;
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double scale1;
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double c3co;
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double c3p1;
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double c3t4;
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double omc3;
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double c2;
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double c1;
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int normalization;
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double y1;
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double y2;
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} resonvc_susp_node, *resonvc_susp_type;
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void resonvc_ns_fetch(register resonvc_susp_type susp, snd_list_type snd_list)
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{
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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 double scale1_reg;
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register double c3co_reg;
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register double c3p1_reg;
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register double c3t4_reg;
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register double omc3_reg;
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register double c2_reg;
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register double c1_reg;
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register int normalization_reg;
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register double y1_reg;
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register double y2_reg;
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register sample_type hz_scale_reg = susp->hz->scale;
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register sample_block_values_type hz_ptr_reg;
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register sample_block_values_type s1_ptr_reg;
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falloc_sample_block(out, "resonvc_ns_fetch");
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out_ptr = out->samples;
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snd_list->block = out;
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while (cnt < max_sample_block_len) { /* 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 = max_sample_block_len - cnt;
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/* don't run past the s1 input sample block: */
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susp_check_term_log_samples(s1, s1_ptr, s1_cnt);
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togo = min(togo, susp->s1_cnt);
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/* don't run past the hz input sample block: */
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susp_check_term_samples(hz, hz_ptr, hz_cnt);
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togo = min(togo, susp->hz_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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/* don't run past logical stop time */
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if (!susp->logically_stopped && susp->susp.log_stop_cnt != UNKNOWN) {
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int to_stop = susp->susp.log_stop_cnt - (susp->susp.current + cnt);
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/* break if to_stop == 0 (we're at the logical stop)
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* AND cnt > 0 (we're not at the beginning of the
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* output block).
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*/
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if (to_stop < togo) {
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if (to_stop == 0) {
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if (cnt) {
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togo = 0;
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break;
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} else /* keep togo as is: since cnt == 0, we
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* can set the logical stop flag on this
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* output block
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*/
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susp->logically_stopped = true;
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} else /* limit togo so we can start a new
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* block at the LST
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*/
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togo = to_stop;
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}
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}
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n = togo;
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scale1_reg = susp->scale1;
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c3co_reg = susp->c3co;
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c3p1_reg = susp->c3p1;
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c3t4_reg = susp->c3t4;
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omc3_reg = susp->omc3;
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c2_reg = susp->c2;
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c1_reg = susp->c1;
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normalization_reg = susp->normalization;
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y1_reg = susp->y1;
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y2_reg = susp->y2;
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hz_ptr_reg = susp->hz_ptr;
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s1_ptr_reg = susp->s1_ptr;
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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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c2_reg = c3t4_reg * cos((hz_scale_reg * *hz_ptr_reg++)) / c3p1_reg;
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c1_reg = (normalization_reg == 0 ? scale1_reg :
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(normalization_reg == 1 ? omc3_reg * sqrt(1.0 - c2_reg * c2_reg / c3t4_reg) :
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sqrt(c3p1_reg * c3p1_reg - c2_reg * c2_reg) * omc3_reg / c3p1_reg)) * scale1_reg;
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{ double y0 = c1_reg * *s1_ptr_reg++ + c2_reg * y1_reg - c3co_reg * y2_reg;
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*out_ptr_reg++ = (sample_type) y0;
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y2_reg = y1_reg; y1_reg = y0; };
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} while (--n); /* inner loop */
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susp->y1 = y1_reg;
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susp->y2 = y2_reg;
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/* using hz_ptr_reg is a bad idea on RS/6000: */
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susp->hz_ptr += togo;
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/* using s1_ptr_reg is a bad idea on RS/6000: */
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susp->s1_ptr += togo;
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out_ptr += togo;
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susp_took(s1_cnt, togo);
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susp_took(hz_cnt, togo);
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cnt += togo;
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} /* outer loop */
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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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/* test for logical stop */
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if (susp->logically_stopped) {
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snd_list->logically_stopped = true;
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} else if (susp->susp.log_stop_cnt == susp->susp.current) {
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susp->logically_stopped = true;
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}
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} /* resonvc_ns_fetch */
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void resonvc_ni_fetch(register resonvc_susp_type susp, snd_list_type snd_list)
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{
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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 double scale1_reg;
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register double c3co_reg;
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register double c3p1_reg;
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register double c3t4_reg;
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register double omc3_reg;
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register double c2_reg;
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register double c1_reg;
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register int normalization_reg;
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register double y1_reg;
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register double y2_reg;
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register double hz_pHaSe_iNcR_rEg = susp->hz_pHaSe_iNcR;
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register double hz_pHaSe_ReG;
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register sample_type hz_x1_sample_reg;
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register sample_block_values_type s1_ptr_reg;
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falloc_sample_block(out, "resonvc_ni_fetch");
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out_ptr = out->samples;
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snd_list->block = out;
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/* make sure sounds are primed with first values */
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if (!susp->started) {
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susp->started = true;
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susp_check_term_samples(hz, hz_ptr, hz_cnt);
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susp->hz_x1_sample = susp_fetch_sample(hz, hz_ptr, hz_cnt);
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susp->c2 = susp->c3t4 * cos(susp->hz_x1_sample) / susp->c3p1;
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susp->c1 = (susp->normalization == 0 ? susp->scale1 :
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(susp->normalization == 1 ? susp->omc3 * sqrt(1.0 - susp->c2 * susp->c2 / susp->c3t4) :
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sqrt(susp->c3p1 * susp->c3p1 - susp->c2 * susp->c2) * susp->omc3 / susp->c3p1)) * susp->scale1;
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}
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while (cnt < max_sample_block_len) { /* 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 = max_sample_block_len - cnt;
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/* don't run past the s1 input sample block: */
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susp_check_term_log_samples(s1, s1_ptr, s1_cnt);
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togo = min(togo, susp->s1_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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/* don't run past logical stop time */
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if (!susp->logically_stopped && susp->susp.log_stop_cnt != UNKNOWN) {
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int to_stop = susp->susp.log_stop_cnt - (susp->susp.current + cnt);
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/* break if to_stop == 0 (we're at the logical stop)
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* AND cnt > 0 (we're not at the beginning of the
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* output block).
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*/
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if (to_stop < togo) {
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if (to_stop == 0) {
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if (cnt) {
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togo = 0;
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break;
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} else /* keep togo as is: since cnt == 0, we
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* can set the logical stop flag on this
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* output block
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*/
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susp->logically_stopped = true;
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} else /* limit togo so we can start a new
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* block at the LST
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*/
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togo = to_stop;
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}
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}
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n = togo;
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scale1_reg = susp->scale1;
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c3co_reg = susp->c3co;
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c3p1_reg = susp->c3p1;
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c3t4_reg = susp->c3t4;
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omc3_reg = susp->omc3;
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c2_reg = susp->c2;
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c1_reg = susp->c1;
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normalization_reg = susp->normalization;
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y1_reg = susp->y1;
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y2_reg = susp->y2;
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hz_pHaSe_ReG = susp->hz_pHaSe;
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hz_x1_sample_reg = susp->hz_x1_sample;
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s1_ptr_reg = susp->s1_ptr;
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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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if (hz_pHaSe_ReG >= 1.0) {
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/* fixup-depends hz */
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/* pick up next sample as hz_x1_sample: */
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susp->hz_ptr++;
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susp_took(hz_cnt, 1);
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hz_pHaSe_ReG -= 1.0;
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susp_check_term_samples_break(hz, hz_ptr, hz_cnt, hz_x1_sample_reg);
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hz_x1_sample_reg = susp_current_sample(hz, hz_ptr);
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c2_reg = susp->c2 = c3t4_reg * cos(hz_x1_sample_reg) / c3p1_reg;
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c1_reg = susp->c1 = (normalization_reg == 0 ? scale1_reg :
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(normalization_reg == 1 ? omc3_reg * sqrt(1.0 - c2_reg * c2_reg / c3t4_reg) :
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sqrt(c3p1_reg * c3p1_reg - c2_reg * c2_reg) * omc3_reg / c3p1_reg)) * scale1_reg;
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}
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{ double y0 = c1_reg * *s1_ptr_reg++ + c2_reg * y1_reg - c3co_reg * y2_reg;
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*out_ptr_reg++ = (sample_type) y0;
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y2_reg = y1_reg; y1_reg = y0; };
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hz_pHaSe_ReG += hz_pHaSe_iNcR_rEg;
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} while (--n); /* inner loop */
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togo -= n;
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susp->y1 = y1_reg;
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susp->y2 = y2_reg;
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susp->hz_pHaSe = hz_pHaSe_ReG;
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susp->hz_x1_sample = hz_x1_sample_reg;
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/* using s1_ptr_reg is a bad idea on RS/6000: */
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susp->s1_ptr += togo;
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out_ptr += togo;
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susp_took(s1_cnt, togo);
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cnt += togo;
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} /* outer loop */
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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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/* test for logical stop */
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if (susp->logically_stopped) {
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snd_list->logically_stopped = true;
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} else if (susp->susp.log_stop_cnt == susp->susp.current) {
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susp->logically_stopped = true;
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}
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} /* resonvc_ni_fetch */
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void resonvc_nr_fetch(register resonvc_susp_type susp, snd_list_type snd_list)
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{
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int cnt = 0; /* how many samples computed */
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sample_type hz_val;
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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 double scale1_reg;
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register double c3co_reg;
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register double c3p1_reg;
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register double c3t4_reg;
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register double omc3_reg;
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register double c2_reg;
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register double c1_reg;
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register int normalization_reg;
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register double y1_reg;
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register double y2_reg;
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register sample_block_values_type s1_ptr_reg;
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falloc_sample_block(out, "resonvc_nr_fetch");
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out_ptr = out->samples;
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snd_list->block = out;
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/* make sure sounds are primed with first values */
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if (!susp->started) {
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susp->started = true;
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susp->hz_pHaSe = 1.0;
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}
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susp_check_term_samples(hz, hz_ptr, hz_cnt);
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while (cnt < max_sample_block_len) { /* 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 = max_sample_block_len - cnt;
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/* don't run past the s1 input sample block: */
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susp_check_term_log_samples(s1, s1_ptr, s1_cnt);
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togo = min(togo, susp->s1_cnt);
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/* grab next hz_x1_sample when phase goes past 1.0; */
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/* use hz_n (computed below) to avoid roundoff errors: */
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if (susp->hz_n <= 0) {
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susp_check_term_samples(hz, hz_ptr, hz_cnt);
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susp->hz_x1_sample = susp_fetch_sample(hz, hz_ptr, hz_cnt);
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susp->hz_pHaSe -= 1.0;
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/* hz_n gets number of samples before phase exceeds 1.0: */
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susp->hz_n = (long) ((1.0 - susp->hz_pHaSe) *
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susp->output_per_hz);
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susp->c2 = susp->c3t4 * cos(susp->hz_x1_sample) / susp->c3p1;
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susp->c1 = (susp->normalization == 0 ? susp->scale1 :
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(susp->normalization == 1 ? susp->omc3 * sqrt(1.0 - susp->c2 * susp->c2 / susp->c3t4) :
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sqrt(susp->c3p1 * susp->c3p1 - susp->c2 * susp->c2) * susp->omc3 / susp->c3p1)) * susp->scale1;
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}
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togo = min(togo, susp->hz_n);
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hz_val = susp->hz_x1_sample;
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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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/* don't run past logical stop time */
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if (!susp->logically_stopped && susp->susp.log_stop_cnt != UNKNOWN) {
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int to_stop = susp->susp.log_stop_cnt - (susp->susp.current + cnt);
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/* break if to_stop == 0 (we're at the logical stop)
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* AND cnt > 0 (we're not at the beginning of the
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* output block).
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*/
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if (to_stop < togo) {
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if (to_stop == 0) {
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if (cnt) {
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togo = 0;
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break;
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} else /* keep togo as is: since cnt == 0, we
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* can set the logical stop flag on this
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* output block
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*/
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susp->logically_stopped = true;
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} else /* limit togo so we can start a new
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* block at the LST
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*/
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togo = to_stop;
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}
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}
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n = togo;
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scale1_reg = susp->scale1;
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c3co_reg = susp->c3co;
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c3p1_reg = susp->c3p1;
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c3t4_reg = susp->c3t4;
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omc3_reg = susp->omc3;
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c2_reg = susp->c2;
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c1_reg = susp->c1;
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normalization_reg = susp->normalization;
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y1_reg = susp->y1;
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y2_reg = susp->y2;
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s1_ptr_reg = susp->s1_ptr;
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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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{ double y0 = c1_reg * *s1_ptr_reg++ + c2_reg * y1_reg - c3co_reg * y2_reg;
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*out_ptr_reg++ = (sample_type) y0;
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y2_reg = y1_reg; y1_reg = y0; };
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} while (--n); /* inner loop */
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susp->y1 = y1_reg;
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susp->y2 = y2_reg;
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/* using s1_ptr_reg is a bad idea on RS/6000: */
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susp->s1_ptr += togo;
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out_ptr += togo;
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susp_took(s1_cnt, togo);
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susp->hz_pHaSe += togo * susp->hz_pHaSe_iNcR;
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susp->hz_n -= togo;
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cnt += togo;
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} /* outer loop */
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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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/* test for logical stop */
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if (susp->logically_stopped) {
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snd_list->logically_stopped = true;
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} else if (susp->susp.log_stop_cnt == susp->susp.current) {
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susp->logically_stopped = true;
|
|
}
|
|
} /* resonvc_nr_fetch */
|
|
|
|
|
|
void resonvc_toss_fetch(susp, snd_list)
|
|
register resonvc_susp_type susp;
|
|
snd_list_type snd_list;
|
|
{
|
|
long final_count = susp->susp.toss_cnt;
|
|
time_type final_time = susp->susp.t0;
|
|
long n;
|
|
|
|
/* fetch samples from s1 up to final_time for this block of zeros */
|
|
while ((round((final_time - susp->s1->t0) * susp->s1->sr)) >=
|
|
susp->s1->current)
|
|
susp_get_samples(s1, s1_ptr, s1_cnt);
|
|
/* fetch samples from hz up to final_time for this block of zeros */
|
|
while ((round((final_time - susp->hz->t0) * susp->hz->sr)) >=
|
|
susp->hz->current)
|
|
susp_get_samples(hz, hz_ptr, hz_cnt);
|
|
/* convert to normal processing when we hit final_count */
|
|
/* we want each signal positioned at final_time */
|
|
n = round((final_time - susp->s1->t0) * susp->s1->sr -
|
|
(susp->s1->current - susp->s1_cnt));
|
|
susp->s1_ptr += n;
|
|
susp_took(s1_cnt, n);
|
|
n = round((final_time - susp->hz->t0) * susp->hz->sr -
|
|
(susp->hz->current - susp->hz_cnt));
|
|
susp->hz_ptr += n;
|
|
susp_took(hz_cnt, n);
|
|
susp->susp.fetch = susp->susp.keep_fetch;
|
|
(*(susp->susp.fetch))(susp, snd_list);
|
|
}
|
|
|
|
|
|
void resonvc_mark(resonvc_susp_type susp)
|
|
{
|
|
sound_xlmark(susp->s1);
|
|
sound_xlmark(susp->hz);
|
|
}
|
|
|
|
|
|
void resonvc_free(resonvc_susp_type susp)
|
|
{
|
|
sound_unref(susp->s1);
|
|
sound_unref(susp->hz);
|
|
ffree_generic(susp, sizeof(resonvc_susp_node), "resonvc_free");
|
|
}
|
|
|
|
|
|
void resonvc_print_tree(resonvc_susp_type susp, int n)
|
|
{
|
|
indent(n);
|
|
stdputstr("s1:");
|
|
sound_print_tree_1(susp->s1, n);
|
|
|
|
indent(n);
|
|
stdputstr("hz:");
|
|
sound_print_tree_1(susp->hz, n);
|
|
}
|
|
|
|
|
|
sound_type snd_make_resonvc(sound_type s1, sound_type hz, double bw, int normalization)
|
|
{
|
|
register resonvc_susp_type susp;
|
|
rate_type sr = s1->sr;
|
|
time_type t0 = max(s1->t0, hz->t0);
|
|
int interp_desc = 0;
|
|
sample_type scale_factor = 1.0F;
|
|
time_type t0_min = t0;
|
|
falloc_generic(susp, resonvc_susp_node, "snd_make_resonvc");
|
|
susp->scale1 = s1->scale;
|
|
susp->c3co = exp(bw * -PI2 / s1->sr);
|
|
susp->c3p1 = susp->c3co + 1.0;
|
|
susp->c3t4 = susp->c3co * 4.0;
|
|
susp->omc3 = 1.0 - susp->c3co;
|
|
susp->c2 = 0.0;
|
|
susp->c1 = 0.0;
|
|
susp->normalization = normalization;
|
|
susp->y1 = 0.0;
|
|
susp->y2 = 0.0;
|
|
hz->scale = (sample_type) (hz->scale * (PI2 / s1->sr));
|
|
|
|
/* select a susp fn based on sample rates */
|
|
interp_desc = (interp_desc << 2) + interp_style(s1, sr);
|
|
interp_desc = (interp_desc << 2) + interp_style(hz, sr);
|
|
switch (interp_desc) {
|
|
case INTERP_sn: /* handled below */
|
|
case INTERP_ss: /* handled below */
|
|
case INTERP_nn: /* handled below */
|
|
case INTERP_ns: susp->susp.fetch = resonvc_ns_fetch; break;
|
|
case INTERP_si: /* handled below */
|
|
case INTERP_ni: susp->susp.fetch = resonvc_ni_fetch; break;
|
|
case INTERP_sr: /* handled below */
|
|
case INTERP_nr: susp->susp.fetch = resonvc_nr_fetch; break;
|
|
default: snd_badsr(); break;
|
|
}
|
|
|
|
susp->terminate_cnt = UNKNOWN;
|
|
/* handle unequal start times, if any */
|
|
if (t0 < s1->t0) sound_prepend_zeros(s1, t0);
|
|
if (t0 < hz->t0) sound_prepend_zeros(hz, t0);
|
|
/* minimum start time over all inputs: */
|
|
t0_min = min(s1->t0, min(hz->t0, t0));
|
|
/* 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 = resonvc_toss_fetch;
|
|
}
|
|
|
|
/* initialize susp state */
|
|
susp->susp.free = resonvc_free;
|
|
susp->susp.sr = sr;
|
|
susp->susp.t0 = t0;
|
|
susp->susp.mark = resonvc_mark;
|
|
susp->susp.print_tree = resonvc_print_tree;
|
|
susp->susp.name = "resonvc";
|
|
susp->logically_stopped = false;
|
|
susp->susp.log_stop_cnt = logical_stop_cnt_cvt(s1);
|
|
susp->started = false;
|
|
susp->susp.current = 0;
|
|
susp->s1 = s1;
|
|
susp->s1_cnt = 0;
|
|
susp->hz = hz;
|
|
susp->hz_cnt = 0;
|
|
susp->hz_pHaSe = 0.0;
|
|
susp->hz_pHaSe_iNcR = hz->sr / sr;
|
|
susp->hz_n = 0;
|
|
susp->output_per_hz = sr / hz->sr;
|
|
return sound_create((snd_susp_type)susp, t0, sr, scale_factor);
|
|
}
|
|
|
|
|
|
sound_type snd_resonvc(sound_type s1, sound_type hz, double bw, int normalization)
|
|
{
|
|
sound_type s1_copy = sound_copy(s1);
|
|
sound_type hz_copy = sound_copy(hz);
|
|
return snd_make_resonvc(s1_copy, hz_copy, bw, normalization);
|
|
}
|