mirror of
https://github.com/cookiengineer/audacity
synced 2025-05-05 22:28:57 +02:00
299 lines
9.6 KiB
C
299 lines
9.6 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 "instrbowedfreq.h"
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void bowed_freq_free();
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typedef struct bowed_freq_susp_struct {
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snd_susp_node susp;
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long terminate_cnt;
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sound_type bowpress_env;
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long bowpress_env_cnt;
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sample_block_values_type bowpress_env_ptr;
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sound_type freq_env;
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long freq_env_cnt;
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sample_block_values_type freq_env_ptr;
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struct instr *mybow;
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int temp_ret_value;
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double frequency;
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} bowed_freq_susp_node, *bowed_freq_susp_type;
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#include "instr.h"
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void bowed_freq_nn_fetch(register bowed_freq_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 struct instr * mybow_reg;
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register double frequency_reg;
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register sample_block_values_type freq_env_ptr_reg;
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register sample_block_values_type bowpress_env_ptr_reg;
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falloc_sample_block(out, "bowed_freq_nn_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 bowpress_env input sample block: */
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susp_check_term_samples(bowpress_env, bowpress_env_ptr, bowpress_env_cnt);
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togo = min(togo, susp->bowpress_env_cnt);
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/* don't run past the freq_env input sample block: */
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susp_check_samples(freq_env, freq_env_ptr, freq_env_cnt);
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togo = min(togo, susp->freq_env_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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mybow_reg = susp->mybow;
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frequency_reg = susp->frequency;
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freq_env_ptr_reg = susp->freq_env_ptr;
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bowpress_env_ptr_reg = susp->bowpress_env_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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controlChange(mybow_reg, 128, BOW_CONTROL_CHANGE_CONST * *bowpress_env_ptr_reg++);
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setFrequency(mybow_reg, frequency_reg + *freq_env_ptr_reg++);
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*out_ptr_reg++ = (sample_type) tick(mybow_reg);
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} while (--n); /* inner loop */
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susp->mybow = mybow_reg;
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/* using freq_env_ptr_reg is a bad idea on RS/6000: */
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susp->freq_env_ptr += togo;
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/* using bowpress_env_ptr_reg is a bad idea on RS/6000: */
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susp->bowpress_env_ptr += togo;
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out_ptr += togo;
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susp_took(bowpress_env_cnt, togo);
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susp_took(freq_env_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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} /* bowed_freq_nn_fetch */
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void bowed_freq_ss_fetch(register bowed_freq_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 struct instr * mybow_reg;
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register double frequency_reg;
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register sample_type freq_env_scale_reg = susp->freq_env->scale;
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register sample_block_values_type freq_env_ptr_reg;
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register sample_type bowpress_env_scale_reg = susp->bowpress_env->scale;
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register sample_block_values_type bowpress_env_ptr_reg;
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falloc_sample_block(out, "bowed_freq_ss_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 bowpress_env input sample block: */
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susp_check_term_samples(bowpress_env, bowpress_env_ptr, bowpress_env_cnt);
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togo = min(togo, susp->bowpress_env_cnt);
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/* don't run past the freq_env input sample block: */
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susp_check_samples(freq_env, freq_env_ptr, freq_env_cnt);
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togo = min(togo, susp->freq_env_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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mybow_reg = susp->mybow;
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frequency_reg = susp->frequency;
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freq_env_ptr_reg = susp->freq_env_ptr;
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bowpress_env_ptr_reg = susp->bowpress_env_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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controlChange(mybow_reg, 128, BOW_CONTROL_CHANGE_CONST * (bowpress_env_scale_reg * *bowpress_env_ptr_reg++));
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setFrequency(mybow_reg, frequency_reg + (freq_env_scale_reg * *freq_env_ptr_reg++));
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*out_ptr_reg++ = (sample_type) tick(mybow_reg);
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} while (--n); /* inner loop */
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susp->mybow = mybow_reg;
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/* using freq_env_ptr_reg is a bad idea on RS/6000: */
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susp->freq_env_ptr += togo;
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/* using bowpress_env_ptr_reg is a bad idea on RS/6000: */
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susp->bowpress_env_ptr += togo;
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out_ptr += togo;
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susp_took(bowpress_env_cnt, togo);
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susp_took(freq_env_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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} /* bowed_freq_ss_fetch */
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void bowed_freq_toss_fetch(susp, snd_list)
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register bowed_freq_susp_type susp;
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snd_list_type snd_list;
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{
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long final_count = susp->susp.toss_cnt;
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time_type final_time = susp->susp.t0;
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long n;
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/* fetch samples from bowpress_env up to final_time for this block of zeros */
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while ((round((final_time - susp->bowpress_env->t0) * susp->bowpress_env->sr)) >=
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susp->bowpress_env->current)
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susp_get_samples(bowpress_env, bowpress_env_ptr, bowpress_env_cnt);
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/* fetch samples from freq_env up to final_time for this block of zeros */
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while ((round((final_time - susp->freq_env->t0) * susp->freq_env->sr)) >=
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susp->freq_env->current)
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susp_get_samples(freq_env, freq_env_ptr, freq_env_cnt);
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/* convert to normal processing when we hit final_count */
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/* we want each signal positioned at final_time */
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n = round((final_time - susp->bowpress_env->t0) * susp->bowpress_env->sr -
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(susp->bowpress_env->current - susp->bowpress_env_cnt));
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susp->bowpress_env_ptr += n;
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susp_took(bowpress_env_cnt, n);
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n = round((final_time - susp->freq_env->t0) * susp->freq_env->sr -
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(susp->freq_env->current - susp->freq_env_cnt));
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susp->freq_env_ptr += n;
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susp_took(freq_env_cnt, n);
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susp->susp.fetch = susp->susp.keep_fetch;
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(*(susp->susp.fetch))(susp, snd_list);
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}
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void bowed_freq_mark(bowed_freq_susp_type susp)
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{
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sound_xlmark(susp->bowpress_env);
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sound_xlmark(susp->freq_env);
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}
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void bowed_freq_free(bowed_freq_susp_type susp)
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{
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deleteInstrument(susp->mybow);
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sound_unref(susp->bowpress_env);
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sound_unref(susp->freq_env);
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ffree_generic(susp, sizeof(bowed_freq_susp_node), "bowed_freq_free");
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}
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void bowed_freq_print_tree(bowed_freq_susp_type susp, int n)
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{
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indent(n);
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stdputstr("bowpress_env:");
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sound_print_tree_1(susp->bowpress_env, n);
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indent(n);
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stdputstr("freq_env:");
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sound_print_tree_1(susp->freq_env, n);
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}
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sound_type snd_make_bowed_freq(double freq, sound_type bowpress_env, sound_type freq_env, rate_type sr)
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{
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register bowed_freq_susp_type susp;
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/* sr specified as input parameter */
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time_type t0 = bowpress_env->t0;
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int interp_desc = 0;
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sample_type scale_factor = 1.0F;
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time_type t0_min = t0;
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falloc_generic(susp, bowed_freq_susp_node, "snd_make_bowed_freq");
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susp->mybow = initInstrument(BOWED, round(sr));
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controlChange(susp->mybow, 1, 0.0);;
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susp->temp_ret_value = noteOn(susp->mybow, freq, 1.0);
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susp->frequency = freq;
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/* select a susp fn based on sample rates */
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interp_desc = (interp_desc << 2) + interp_style(bowpress_env, sr);
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interp_desc = (interp_desc << 2) + interp_style(freq_env, sr);
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switch (interp_desc) {
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case INTERP_nn: susp->susp.fetch = bowed_freq_nn_fetch; break;
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case INTERP_ss: susp->susp.fetch = bowed_freq_ss_fetch; break;
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default: snd_badsr(); break;
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}
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susp->terminate_cnt = UNKNOWN;
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/* handle unequal start times, if any */
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if (t0 < bowpress_env->t0) sound_prepend_zeros(bowpress_env, t0);
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if (t0 < freq_env->t0) sound_prepend_zeros(freq_env, t0);
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/* minimum start time over all inputs: */
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t0_min = min(bowpress_env->t0, min(freq_env->t0, t0));
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/* how many samples to toss before t0: */
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susp->susp.toss_cnt = (long) ((t0 - t0_min) * sr + 0.5);
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if (susp->susp.toss_cnt > 0) {
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susp->susp.keep_fetch = susp->susp.fetch;
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susp->susp.fetch = bowed_freq_toss_fetch;
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}
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/* initialize susp state */
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susp->susp.free = bowed_freq_free;
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susp->susp.sr = sr;
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susp->susp.t0 = t0;
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susp->susp.mark = bowed_freq_mark;
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susp->susp.print_tree = bowed_freq_print_tree;
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susp->susp.name = "bowed_freq";
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susp->susp.log_stop_cnt = UNKNOWN;
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susp->susp.current = 0;
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susp->bowpress_env = bowpress_env;
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susp->bowpress_env_cnt = 0;
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susp->freq_env = freq_env;
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susp->freq_env_cnt = 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_bowed_freq(double freq, sound_type bowpress_env, sound_type freq_env, rate_type sr)
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{
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sound_type bowpress_env_copy = sound_copy(bowpress_env);
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sound_type freq_env_copy = sound_copy(freq_env);
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return snd_make_bowed_freq(freq, bowpress_env_copy, freq_env_copy, sr);
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}
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