diff options
Diffstat (limited to 'tran/instrclar.c')
| -rw-r--r-- | tran/instrclar.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/tran/instrclar.c b/tran/instrclar.c new file mode 100644 index 0000000..8f9cb38 --- /dev/null +++ b/tran/instrclar.c @@ -0,0 +1,181 @@ +#include "stdio.h" +#ifndef mips +#include "stdlib.h" +#endif +#include "xlisp.h" +#include "sound.h" + +#include "falloc.h" +#include "cext.h" +#include "instrclar.h" + +void clarinet_free(); + + +typedef struct clarinet_susp_struct { + snd_susp_node susp; + long terminate_cnt; + sound_type breath_env; + long breath_env_cnt; + sample_block_values_type breath_env_ptr; + + struct instr *clar; + int temp_ret_value; +} clarinet_susp_node, *clarinet_susp_type; + + + #include "instr.h" + + +void clarinet_s_fetch(register clarinet_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 struct instr * clar_reg; + register sample_type breath_env_scale_reg = susp->breath_env->scale; + register sample_block_values_type breath_env_ptr_reg; + falloc_sample_block(out, "clarinet_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 breath_env input sample block: */ + susp_check_term_samples(breath_env, breath_env_ptr, breath_env_cnt); + togo = min(togo, susp->breath_env_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; + clar_reg = susp->clar; + breath_env_ptr_reg = susp->breath_env_ptr; + out_ptr_reg = out_ptr; + if (n) do { /* the inner sample computation loop */ + + controlChange(clar_reg, 128, CLAR_CONTROL_CHANGE_CONST * (breath_env_scale_reg * *breath_env_ptr_reg++)); + *out_ptr_reg++ = (sample_type) tick(clar_reg); + } while (--n); /* inner loop */ + + susp->clar = clar_reg; + /* using breath_env_ptr_reg is a bad idea on RS/6000: */ + susp->breath_env_ptr += togo; + out_ptr += togo; + susp_took(breath_env_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; + } +} /* clarinet_s_fetch */ + + +void clarinet_toss_fetch(susp, snd_list) + register clarinet_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 breath_env up to final_time for this block of zeros */ + while ((round((final_time - susp->breath_env->t0) * susp->breath_env->sr)) >= + susp->breath_env->current) + susp_get_samples(breath_env, breath_env_ptr, breath_env_cnt); + /* convert to normal processing when we hit final_count */ + /* we want each signal positioned at final_time */ + n = round((final_time - susp->breath_env->t0) * susp->breath_env->sr - + (susp->breath_env->current - susp->breath_env_cnt)); + susp->breath_env_ptr += n; + susp_took(breath_env_cnt, n); + susp->susp.fetch = susp->susp.keep_fetch; + (*(susp->susp.fetch))(susp, snd_list); +} + + +void clarinet_mark(clarinet_susp_type susp) +{ + sound_xlmark(susp->breath_env); +} + + +void clarinet_free(clarinet_susp_type susp) +{ + + deleteInstrument(susp->clar); + sound_unref(susp->breath_env); + ffree_generic(susp, sizeof(clarinet_susp_node), "clarinet_free"); +} + + +void clarinet_print_tree(clarinet_susp_type susp, int n) +{ + indent(n); + stdputstr("breath_env:"); + sound_print_tree_1(susp->breath_env, n); +} + + +sound_type snd_make_clarinet(double freq, sound_type breath_env, rate_type sr) +{ + register clarinet_susp_type susp; + /* sr specified as input parameter */ + time_type t0 = breath_env->t0; + int interp_desc = 0; + sample_type scale_factor = 1.0F; + time_type t0_min = t0; + falloc_generic(susp, clarinet_susp_node, "snd_make_clarinet"); + susp->clar = initInstrument(CLARINET, round(sr)); + controlChange(susp->clar, 1, 0.0);; + susp->temp_ret_value = noteOn(susp->clar, freq, 1.0); + susp->susp.fetch = clarinet_s_fetch; + susp->terminate_cnt = UNKNOWN; + /* handle unequal start times, if any */ + if (t0 < breath_env->t0) sound_prepend_zeros(breath_env, t0); + /* minimum start time over all inputs: */ + t0_min = min(breath_env->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 = clarinet_toss_fetch; + } + + /* initialize susp state */ + susp->susp.free = clarinet_free; + susp->susp.sr = sr; + susp->susp.t0 = t0; + susp->susp.mark = clarinet_mark; + susp->susp.print_tree = clarinet_print_tree; + susp->susp.name = "clarinet"; + susp->susp.log_stop_cnt = UNKNOWN; + susp->susp.current = 0; + susp->breath_env = breath_env; + susp->breath_env_cnt = 0; + return sound_create((snd_susp_type)susp, t0, sr, scale_factor); +} + + +sound_type snd_clarinet(double freq, sound_type breath_env, rate_type sr) +{ + sound_type breath_env_copy = sound_copy(breath_env); + return snd_make_clarinet(freq, breath_env_copy, sr); +} |