diff options
Diffstat (limited to 'tran/tapf.c')
-rw-r--r-- | tran/tapf.c | 619 |
1 files changed, 619 insertions, 0 deletions
diff --git a/tran/tapf.c b/tran/tapf.c new file mode 100644 index 0000000..c7c4556 --- /dev/null +++ b/tran/tapf.c @@ -0,0 +1,619 @@ +#include "stdio.h" +#ifndef mips +#include "stdlib.h" +#endif +#include "xlisp.h" +#include "sound.h" + +#include "falloc.h" +#include "cext.h" +#include "tapf.h" + +void tapf_free(); + + +typedef struct tapf_susp_struct { + snd_susp_node susp; + boolean started; + long terminate_cnt; + boolean logically_stopped; + sound_type s1; + long s1_cnt; + sample_block_values_type s1_ptr; + sound_type vardelay; + long vardelay_cnt; + sample_block_values_type vardelay_ptr; + + /* support for interpolation of vardelay */ + sample_type vardelay_x1_sample; + double vardelay_pHaSe; + double vardelay_pHaSe_iNcR; + + /* support for ramp between samples of vardelay */ + double output_per_vardelay; + long vardelay_n; + + double offset; + double vdscale; + long maxdelay; + long bufflen; + long index; + sample_type *buffer; +} tapf_susp_node, *tapf_susp_type; + + +void tapf_sn_fetch(register tapf_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 offset_reg; + register double vdscale_reg; + register long maxdelay_reg; + register long bufflen_reg; + register long index_reg; + register sample_type * buffer_reg; + register sample_block_values_type vardelay_ptr_reg; + register sample_type s1_scale_reg = susp->s1->scale; + register sample_block_values_type s1_ptr_reg; + falloc_sample_block(out, "tapf_sn_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 s1 input sample block: */ + susp_check_term_log_samples(s1, s1_ptr, s1_cnt); + togo = min(togo, susp->s1_cnt); + + /* don't run past the vardelay input sample block: */ + susp_check_term_samples(vardelay, vardelay_ptr, vardelay_cnt); + togo = min(togo, susp->vardelay_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; + offset_reg = susp->offset; + vdscale_reg = susp->vdscale; + maxdelay_reg = susp->maxdelay; + bufflen_reg = susp->bufflen; + index_reg = susp->index; + buffer_reg = susp->buffer; + vardelay_ptr_reg = susp->vardelay_ptr; + s1_ptr_reg = susp->s1_ptr; + out_ptr_reg = out_ptr; + if (n) do { /* the inner sample computation loop */ + long phase; + phase = (long) (*vardelay_ptr_reg++ * vdscale_reg + offset_reg); + /* now phase should give number of samples of delay */ + if (phase < 0) phase = 0; + else if (phase > maxdelay_reg) phase = maxdelay_reg; + phase = index_reg - phase; + /* now phase is a location in the buffer_reg (before modulo) */ + + /* Time out to update the buffer_reg: + * this is a tricky buffer_reg: buffer_reg[0] == buffer_reg[bufflen_reg] + * the logical length is bufflen_reg, but the actual length + * is bufflen_reg + 1 to allow for a repeated sample at the + * end. This allows for efficient interpolation. + */ + buffer_reg[index_reg++] = (s1_scale_reg * *s1_ptr_reg++); + if (index_reg >= bufflen_reg) { + index_reg = 0; + } + + /* back to the phase calculation: + * use conditional instead of modulo + */ + if (phase < 0) phase += bufflen_reg; + *out_ptr_reg++ = (sample_type) (buffer_reg[phase]);; + } while (--n); /* inner loop */ + + susp->bufflen = bufflen_reg; + susp->index = index_reg; + /* using vardelay_ptr_reg is a bad idea on RS/6000: */ + susp->vardelay_ptr += togo; + /* using s1_ptr_reg is a bad idea on RS/6000: */ + susp->s1_ptr += togo; + out_ptr += togo; + susp_took(s1_cnt, togo); + susp_took(vardelay_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; + } +} /* tapf_sn_fetch */ + + +void tapf_si_fetch(register tapf_susp_type susp, snd_list_type snd_list) +{ + int cnt = 0; /* how many samples computed */ + sample_type vardelay_x2_sample; + 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 offset_reg; + register double vdscale_reg; + register long maxdelay_reg; + register long bufflen_reg; + register long index_reg; + register sample_type * buffer_reg; + register double vardelay_pHaSe_iNcR_rEg = susp->vardelay_pHaSe_iNcR; + register double vardelay_pHaSe_ReG; + register sample_type vardelay_x1_sample_reg; + register sample_type s1_scale_reg = susp->s1->scale; + register sample_block_values_type s1_ptr_reg; + falloc_sample_block(out, "tapf_si_fetch"); + out_ptr = out->samples; + snd_list->block = out; + + /* make sure sounds are primed with first values */ + if (!susp->started) { + susp->started = true; + susp_check_term_samples(vardelay, vardelay_ptr, vardelay_cnt); + susp->vardelay_x1_sample = (susp->vardelay_cnt--, *(susp->vardelay_ptr)); + } + + susp_check_term_samples(vardelay, vardelay_ptr, vardelay_cnt); + vardelay_x2_sample = *(susp->vardelay_ptr); + + 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 s1 input sample block: */ + susp_check_term_log_samples(s1, s1_ptr, s1_cnt); + togo = min(togo, susp->s1_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; + offset_reg = susp->offset; + vdscale_reg = susp->vdscale; + maxdelay_reg = susp->maxdelay; + bufflen_reg = susp->bufflen; + index_reg = susp->index; + buffer_reg = susp->buffer; + vardelay_pHaSe_ReG = susp->vardelay_pHaSe; + vardelay_x1_sample_reg = susp->vardelay_x1_sample; + s1_ptr_reg = susp->s1_ptr; + out_ptr_reg = out_ptr; + if (n) do { /* the inner sample computation loop */ + long phase; + if (vardelay_pHaSe_ReG >= 1.0) { + vardelay_x1_sample_reg = vardelay_x2_sample; + /* pick up next sample as vardelay_x2_sample: */ + susp->vardelay_ptr++; + susp_took(vardelay_cnt, 1); + vardelay_pHaSe_ReG -= 1.0; + susp_check_term_samples_break(vardelay, vardelay_ptr, vardelay_cnt, vardelay_x2_sample); + } + phase = (long) ( + (vardelay_x1_sample_reg * (1 - vardelay_pHaSe_ReG) + vardelay_x2_sample * vardelay_pHaSe_ReG) * vdscale_reg + offset_reg); + /* now phase should give number of samples of delay */ + if (phase < 0) phase = 0; + else if (phase > maxdelay_reg) phase = maxdelay_reg; + phase = index_reg - phase; + /* now phase is a location in the buffer_reg (before modulo) */ + + /* Time out to update the buffer_reg: + * this is a tricky buffer_reg: buffer_reg[0] == buffer_reg[bufflen_reg] + * the logical length is bufflen_reg, but the actual length + * is bufflen_reg + 1 to allow for a repeated sample at the + * end. This allows for efficient interpolation. + */ + buffer_reg[index_reg++] = (s1_scale_reg * *s1_ptr_reg++); + if (index_reg >= bufflen_reg) { + index_reg = 0; + } + + /* back to the phase calculation: + * use conditional instead of modulo + */ + if (phase < 0) phase += bufflen_reg; + *out_ptr_reg++ = (sample_type) (buffer_reg[phase]);; + vardelay_pHaSe_ReG += vardelay_pHaSe_iNcR_rEg; + } while (--n); /* inner loop */ + + togo -= n; + susp->bufflen = bufflen_reg; + susp->index = index_reg; + susp->vardelay_pHaSe = vardelay_pHaSe_ReG; + susp->vardelay_x1_sample = vardelay_x1_sample_reg; + /* using s1_ptr_reg is a bad idea on RS/6000: */ + susp->s1_ptr += togo; + out_ptr += togo; + susp_took(s1_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; + } +} /* tapf_si_fetch */ + + +void tapf_sr_fetch(register tapf_susp_type susp, snd_list_type snd_list) +{ + int cnt = 0; /* how many samples computed */ + sample_type vardelay_DeLtA; + sample_type vardelay_val; + sample_type vardelay_x2_sample; + 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 offset_reg; + register double vdscale_reg; + register long maxdelay_reg; + register long bufflen_reg; + register long index_reg; + register sample_type * buffer_reg; + register sample_type s1_scale_reg = susp->s1->scale; + register sample_block_values_type s1_ptr_reg; + falloc_sample_block(out, "tapf_sr_fetch"); + out_ptr = out->samples; + snd_list->block = out; + + /* make sure sounds are primed with first values */ + if (!susp->started) { + susp->started = true; + susp->vardelay_pHaSe = 1.0; + } + + susp_check_term_samples(vardelay, vardelay_ptr, vardelay_cnt); + vardelay_x2_sample = *(susp->vardelay_ptr); + + 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 s1 input sample block: */ + susp_check_term_log_samples(s1, s1_ptr, s1_cnt); + togo = min(togo, susp->s1_cnt); + + /* grab next vardelay_x2_sample when phase goes past 1.0; */ + /* we use vardelay_n (computed below) to avoid roundoff errors: */ + if (susp->vardelay_n <= 0) { + susp->vardelay_x1_sample = vardelay_x2_sample; + susp->vardelay_ptr++; + susp_took(vardelay_cnt, 1); + susp->vardelay_pHaSe -= 1.0; + susp_check_term_samples(vardelay, vardelay_ptr, vardelay_cnt); + vardelay_x2_sample = *(susp->vardelay_ptr); + /* vardelay_n gets number of samples before phase exceeds 1.0: */ + susp->vardelay_n = (long) ((1.0 - susp->vardelay_pHaSe) * + susp->output_per_vardelay); + } + togo = min(togo, susp->vardelay_n); + vardelay_DeLtA = (sample_type) ((vardelay_x2_sample - susp->vardelay_x1_sample) * susp->vardelay_pHaSe_iNcR); + vardelay_val = (sample_type) (susp->vardelay_x1_sample * (1.0 - susp->vardelay_pHaSe) + + vardelay_x2_sample * susp->vardelay_pHaSe); + + /* 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; + offset_reg = susp->offset; + vdscale_reg = susp->vdscale; + maxdelay_reg = susp->maxdelay; + bufflen_reg = susp->bufflen; + index_reg = susp->index; + buffer_reg = susp->buffer; + s1_ptr_reg = susp->s1_ptr; + out_ptr_reg = out_ptr; + if (n) do { /* the inner sample computation loop */ + long phase; + phase = (long) (vardelay_val * vdscale_reg + offset_reg); + /* now phase should give number of samples of delay */ + if (phase < 0) phase = 0; + else if (phase > maxdelay_reg) phase = maxdelay_reg; + phase = index_reg - phase; + /* now phase is a location in the buffer_reg (before modulo) */ + + /* Time out to update the buffer_reg: + * this is a tricky buffer_reg: buffer_reg[0] == buffer_reg[bufflen_reg] + * the logical length is bufflen_reg, but the actual length + * is bufflen_reg + 1 to allow for a repeated sample at the + * end. This allows for efficient interpolation. + */ + buffer_reg[index_reg++] = (s1_scale_reg * *s1_ptr_reg++); + if (index_reg >= bufflen_reg) { + index_reg = 0; + } + + /* back to the phase calculation: + * use conditional instead of modulo + */ + if (phase < 0) phase += bufflen_reg; + *out_ptr_reg++ = (sample_type) (buffer_reg[phase]);; + vardelay_val += vardelay_DeLtA; + } while (--n); /* inner loop */ + + susp->bufflen = bufflen_reg; + susp->index = index_reg; + /* using s1_ptr_reg is a bad idea on RS/6000: */ + susp->s1_ptr += togo; + out_ptr += togo; + susp_took(s1_cnt, togo); + susp->vardelay_pHaSe += togo * susp->vardelay_pHaSe_iNcR; + susp->vardelay_n -= 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; + } +} /* tapf_sr_fetch */ + + +void tapf_toss_fetch(susp, snd_list) + register tapf_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 vardelay up to final_time for this block of zeros */ + while ((round((final_time - susp->vardelay->t0) * susp->vardelay->sr)) >= + susp->vardelay->current) + susp_get_samples(vardelay, vardelay_ptr, vardelay_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->vardelay->t0) * susp->vardelay->sr - + (susp->vardelay->current - susp->vardelay_cnt)); + susp->vardelay_ptr += n; + susp_took(vardelay_cnt, n); + susp->susp.fetch = susp->susp.keep_fetch; + (*(susp->susp.fetch))(susp, snd_list); +} + + +void tapf_mark(tapf_susp_type susp) +{ + sound_xlmark(susp->s1); + sound_xlmark(susp->vardelay); +} + + +void tapf_free(tapf_susp_type susp) +{ + free(susp->buffer); + sound_unref(susp->s1); + sound_unref(susp->vardelay); + ffree_generic(susp, sizeof(tapf_susp_node), "tapf_free"); +} + + +void tapf_print_tree(tapf_susp_type susp, int n) +{ + indent(n); + stdputstr("s1:"); + sound_print_tree_1(susp->s1, n); + + indent(n); + stdputstr("vardelay:"); + sound_print_tree_1(susp->vardelay, n); +} + + +sound_type snd_make_tapf(sound_type s1, double offset, sound_type vardelay, double maxdelay) +{ + register tapf_susp_type susp; + rate_type sr = s1->sr; + time_type t0 = max(s1->t0, vardelay->t0); + int interp_desc = 0; + sample_type scale_factor = 1.0F; + time_type t0_min = t0; + falloc_generic(susp, tapf_susp_node, "snd_make_tapf"); + susp->offset = offset * s1->sr; + susp->vdscale = vardelay->scale * s1->sr; + susp->maxdelay = (long)(maxdelay * s1->sr); + susp->bufflen = max(2, (long) (susp->maxdelay + 0.5)); + susp->index = susp->bufflen; + susp->buffer = (sample_type *) calloc(susp->bufflen + 1, sizeof(sample_type)); + + /* select a susp fn based on sample rates */ + interp_desc = (interp_desc << 2) + interp_style(s1, sr); + interp_desc = (interp_desc << 2) + interp_style(vardelay, sr); + switch (interp_desc) { + case INTERP_ns: /* handled below */ + case INTERP_nn: /* handled below */ + case INTERP_ss: /* handled below */ + case INTERP_sn: susp->susp.fetch = tapf_sn_fetch; break; + case INTERP_ni: /* handled below */ + case INTERP_si: susp->susp.fetch = tapf_si_fetch; break; + case INTERP_nr: /* handled below */ + case INTERP_sr: susp->susp.fetch = tapf_sr_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 < vardelay->t0) sound_prepend_zeros(vardelay, t0); + /* minimum start time over all inputs: */ + t0_min = min(s1->t0, min(vardelay->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 = tapf_toss_fetch; + } + + /* initialize susp state */ + susp->susp.free = tapf_free; + susp->susp.sr = sr; + susp->susp.t0 = t0; + susp->susp.mark = tapf_mark; + susp->susp.print_tree = tapf_print_tree; + susp->susp.name = "tapf"; + 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->vardelay = vardelay; + susp->vardelay_cnt = 0; + susp->vardelay_pHaSe = 0.0; + susp->vardelay_pHaSe_iNcR = vardelay->sr / sr; + susp->vardelay_n = 0; + susp->output_per_vardelay = sr / vardelay->sr; + return sound_create((snd_susp_type)susp, t0, sr, scale_factor); +} + + +sound_type snd_tapf(sound_type s1, double offset, sound_type vardelay, double maxdelay) +{ + sound_type s1_copy = sound_copy(s1); + sound_type vardelay_copy = sound_copy(vardelay); + return snd_make_tapf(s1_copy, offset, vardelay_copy, maxdelay); +} |