resoncv.c

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#include "stdio.h"
#ifndef mips
#include "stdlib.h"
#endif
#include "xlisp.h"
#include "sound.h"

#include "falloc.h"
#include "cext.h"
#include "resoncv.h"

void resoncv_free();


typedef struct resoncv_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 bw;
    long bw_cnt;
    sample_block_values_type bw_ptr;

    /* support for interpolation of bw */
    sample_type bw_x1_sample;
    double bw_pHaSe;
    double bw_pHaSe_iNcR;

    /* support for ramp between samples of bw */
    double output_per_bw;
    long bw_n;

    double scale1;
    double c3co;
    double coshz;
    double c2;
    double c1;
    int normalization;
    double y1;
    double y2;
} resoncv_susp_node, *resoncv_susp_type;


void resoncv_ns_fetch(register resoncv_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 scale1_reg;
    register double c3co_reg;
    register double coshz_reg;
    register double c2_reg;
    register double c1_reg;
    register int normalization_reg;
    register double y1_reg;
    register double y2_reg;
    register sample_type bw_scale_reg = susp->bw->scale;
    register sample_block_values_type bw_ptr_reg;
    register sample_block_values_type s1_ptr_reg;
    falloc_sample_block(out, "resoncv_ns_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 bw input sample block: */
	susp_check_term_samples(bw, bw_ptr, bw_cnt);
	togo = MIN(togo, susp->bw_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;
	scale1_reg = susp->scale1;
	c3co_reg = susp->c3co;
	coshz_reg = susp->coshz;
	c2_reg = susp->c2;
	c1_reg = susp->c1;
	normalization_reg = susp->normalization;
	y1_reg = susp->y1;
	y2_reg = susp->y2;
	bw_ptr_reg = susp->bw_ptr;
	s1_ptr_reg = susp->s1_ptr;
	out_ptr_reg = out_ptr;
	if (n) do { /* the inner sample computation loop */
	    double c3p1;
	    double c3t4;
	    double omc3;
	    c3co_reg = exp((bw_scale_reg * *bw_ptr_reg++));
	    c3p1 = c3co_reg + 1.0;
	    c3t4 = c3co_reg * 4.0;
	    omc3 = 1.0 - c3co_reg;
	    c2_reg = c3t4 * coshz_reg / c3p1;
	    c1_reg = (normalization_reg == 0 ? 1.0 :
          (normalization_reg == 1 ? omc3 * sqrt(1.0 - c2_reg * c2_reg / c3t4) :
              sqrt(c3p1 * c3p1 - c2_reg * c2_reg) * omc3 / c3p1)) * scale1_reg;
{ double y0 = c1_reg * *s1_ptr_reg++ + c2_reg * y1_reg - c3co_reg * y2_reg;
            *out_ptr_reg++ = (sample_type) y0; 
            y2_reg = y1_reg; y1_reg = y0; };
	} while (--n); /* inner loop */

	susp->y1 = y1_reg;
	susp->y2 = y2_reg;
	/* using bw_ptr_reg is a bad idea on RS/6000: */
	susp->bw_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(bw_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;
    }
} /* resoncv_ns_fetch */


void resoncv_ni_fetch(register resoncv_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 scale1_reg;
    register double c3co_reg;
    register double coshz_reg;
    register double c2_reg;
    register double c1_reg;
    register int normalization_reg;
    register double y1_reg;
    register double y2_reg;
    register double bw_pHaSe_iNcR_rEg = susp->bw_pHaSe_iNcR;
    register double bw_pHaSe_ReG;
    register sample_type bw_x1_sample_reg;
    register sample_block_values_type s1_ptr_reg;
    falloc_sample_block(out, "resoncv_ni_fetch");
    out_ptr = out->samples;
    snd_list->block = out;

    /* make sure sounds are primed with first values */
    if (!susp->started) {
	    double c3p1;
	    double c3t4;
	    double omc3;
	susp->started = true;
	susp_check_term_samples(bw, bw_ptr, bw_cnt);
	susp->bw_x1_sample = susp_fetch_sample(bw, bw_ptr, bw_cnt);
	susp->c3co = exp(susp->bw_x1_sample);
	c3p1 = susp->c3co + 1.0;
	c3t4 = susp->c3co * 4.0;
	omc3 = 1.0 - susp->c3co;
	susp->c2 = c3t4 * susp->coshz / c3p1;
	susp->c1 = (susp->normalization == 0 ? 1.0 :
          (susp->normalization == 1 ? omc3 * sqrt(1.0 - susp->c2 * susp->c2 / c3t4) :
              sqrt(c3p1 * c3p1 - susp->c2 * susp->c2) * omc3 / c3p1)) * susp->scale1;
    }

    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;
	scale1_reg = susp->scale1;
	c3co_reg = susp->c3co;
	coshz_reg = susp->coshz;
	c2_reg = susp->c2;
	c1_reg = susp->c1;
	normalization_reg = susp->normalization;
	y1_reg = susp->y1;
	y2_reg = susp->y2;
	bw_pHaSe_ReG = susp->bw_pHaSe;
	bw_x1_sample_reg = susp->bw_x1_sample;
	s1_ptr_reg = susp->s1_ptr;
	out_ptr_reg = out_ptr;
	if (n) do { /* the inner sample computation loop */
	    if (bw_pHaSe_ReG >= 1.0) {
/* fixup-depends bw */
		double c3p1; 
		double c3t4; 
		double omc3; 
		/* pick up next sample as bw_x1_sample: */
		susp->bw_ptr++;
		susp_took(bw_cnt, 1);
		bw_pHaSe_ReG -= 1.0;
		susp_check_term_samples_break(bw, bw_ptr, bw_cnt, bw_x1_sample_reg);
		bw_x1_sample_reg = susp_current_sample(bw, bw_ptr);
		c3co_reg = susp->c3co = exp(bw_x1_sample_reg);
		c3p1 = c3co_reg + 1.0;
		c3t4 = c3co_reg * 4.0;
		omc3 = 1.0 - c3co_reg;
		c2_reg = susp->c2 = c3t4 * coshz_reg / c3p1;
		c1_reg = susp->c1 = (normalization_reg == 0 ? 1.0 :
          (normalization_reg == 1 ? omc3 * sqrt(1.0 - c2_reg * c2_reg / c3t4) :
              sqrt(c3p1 * c3p1 - c2_reg * c2_reg) * omc3 / c3p1)) * scale1_reg;
	    }
{ double y0 = c1_reg * *s1_ptr_reg++ + c2_reg * y1_reg - c3co_reg * y2_reg;
            *out_ptr_reg++ = (sample_type) y0; 
            y2_reg = y1_reg; y1_reg = y0; };
	    bw_pHaSe_ReG += bw_pHaSe_iNcR_rEg;
	} while (--n); /* inner loop */

	togo -= n;
	susp->y1 = y1_reg;
	susp->y2 = y2_reg;