Move library tree where it belongs

lib-src/libnyquist/nyquist/tran/allpoles.c

@@ -0,0 +1,264 @@
+#include "stdio.h"
+#ifndef mips
+#include "stdlib.h"
+#endif
+#include "xlisp.h"
+#include "sound.h"
+
+#include "falloc.h"
+#include "cext.h"
+#include "allpoles.h"
+
+void allpoles_free();
+
+
+typedef struct allpoles_susp_struct {
+    snd_susp_node susp;
+    long terminate_cnt;
+    boolean logically_stopped;
+    sound_type x_snd;
+    long x_snd_cnt;
+    sample_block_values_type x_snd_ptr;
+
+    long ak_len;
+    LVAL ak_array;
+    double gain;
+    double *ak_coefs;
+    double *zk_buf;
+    long index;
+} allpoles_susp_node, *allpoles_susp_type;
+
+
+void allpoles_s_fetch(register allpoles_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 long ak_len_reg;
+    register double gain_reg;
+    register double * ak_coefs_reg;
+    register double * zk_buf_reg;
+    register long index_reg;
+    register sample_type x_snd_scale_reg = susp->x_snd->scale;
+    register sample_block_values_type x_snd_ptr_reg;
+    falloc_sample_block(out, "allpoles_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 x_snd input sample block: */
+	susp_check_term_log_samples(x_snd, x_snd_ptr, x_snd_cnt);
+	togo = min(togo, susp->x_snd_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;
+	    }
+	}
+
+
+      if (susp->ak_array == NULL) {
+             togo = 0; /* indicate termination */
+             break;    /* we're done */
+      }
+      else if (!vectorp(susp->ak_array))
+           xlerror("array expected", susp->ak_array);
+      else if (susp->ak_coefs == NULL)
+           {
+               long i;
+               susp->ak_len = getsize(susp->ak_array);
+               if (susp->ak_len < 1) xlerror("array has not elements", susp->ak_array);
+               susp->ak_coefs = (double *) calloc(susp->ak_len, sizeof(double));
+               susp->zk_buf   = (double *) calloc(susp->ak_len, sizeof(double));
+ 
+              /* at this point we have a new array and a place to put ak coefs */
+              for(i=0; i < susp->ak_len; i++) {
+                 LVAL elem = getelement(susp->ak_array,i);
+                 if (ntype(elem) != FLONUM) {
+                      xlerror("flonum expected", elem);
+                 }
+                 susp->ak_coefs[i] = getflonum(elem);
+              }
+
+            }
+
+	n = togo;
+	ak_len_reg = susp->ak_len;
+	gain_reg = susp->gain;
+	ak_coefs_reg = susp->ak_coefs;
+	zk_buf_reg = susp->zk_buf;
+	index_reg = susp->index;
+	x_snd_ptr_reg = susp->x_snd_ptr;
+	out_ptr_reg = out_ptr;
+	if (n) do { /* the inner sample computation loop */
+double z0; long xi; long xj;
+               z0 = (x_snd_scale_reg * *x_snd_ptr_reg++)*gain_reg;
+               for (xi=0; xi < ak_len_reg ; xi++)
+                   {
+                     xj = index_reg + xi; if (xj >= ak_len_reg) xj -= ak_len_reg;
+                     z0 +=  ak_coefs_reg[xi] * zk_buf_reg[xj];
+                   }
+               zk_buf_reg[index_reg] = z0;
+               index_reg++; if (index_reg == ak_len_reg) index_reg = 0;
+               *out_ptr_reg++ = (sample_type) z0;
+;
+	} while (--n); /* inner loop */
+
+	susp->zk_buf = zk_buf_reg;
+	susp->index = index_reg;
+	/* using x_snd_ptr_reg is a bad idea on RS/6000: */
+	susp->x_snd_ptr += togo;
+	out_ptr += togo;
+	susp_took(x_snd_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;
+    }
+} /* allpoles_s_fetch */
+
+
+void allpoles_toss_fetch(susp, snd_list)
+  register allpoles_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 x_snd up to final_time for this block of zeros */
+    while ((round((final_time - susp->x_snd->t0) * susp->x_snd->sr)) >=
+	   susp->x_snd->current)
+	susp_get_samples(x_snd, x_snd_ptr, x_snd_cnt);
+    /* convert to normal processing when we hit final_count */
+    /* we want each signal positioned at final_time */
+    n = round((final_time - susp->x_snd->t0) * susp->x_snd->sr -
+         (susp->x_snd->current - susp->x_snd_cnt));
+    susp->x_snd_ptr += n;
+    susp_took(x_snd_cnt, n);
+    susp->susp.fetch = susp->susp.keep_fetch;
+    (*(susp->susp.fetch))(susp, snd_list);
+}
+
+
+void allpoles_mark(allpoles_susp_type susp)
+{
+    if (susp->ak_array) mark(susp->ak_array);
+    sound_xlmark(susp->x_snd);
+}
+
+
+void allpoles_free(allpoles_susp_type susp)
+{
+
+     free(susp->zk_buf);
+     free(susp->ak_coefs);
+     susp->ak_array = NULL;  /* free array */
+    sound_unref(susp->x_snd);
+    ffree_generic(susp, sizeof(allpoles_susp_node), "allpoles_free");
+}
+
+
+void allpoles_print_tree(allpoles_susp_type susp, int n)
+{
+    indent(n);
+    stdputstr("x_snd:");
+    sound_print_tree_1(susp->x_snd, n);
+}
+
+
+sound_type snd_make_allpoles(sound_type x_snd, LVAL ak_array, double gain)
+{
+    register allpoles_susp_type susp;
+    rate_type sr = x_snd->sr;
+    time_type t0 = x_snd->t0;
+    int interp_desc = 0;
+    sample_type scale_factor = 1.0F;
+    time_type t0_min = t0;
+    falloc_generic(susp, allpoles_susp_node, "snd_make_allpoles");
+    susp->ak_len = 0;
+    susp->ak_array = ak_array;
+    susp->gain = gain;
+    susp->ak_coefs = NULL;
+    susp->zk_buf = NULL;
+    susp->index = 0;
+    susp->susp.fetch = allpoles_s_fetch;
+    susp->terminate_cnt = UNKNOWN;
+    /* handle unequal start times, if any */
+    if (t0 < x_snd->t0) sound_prepend_zeros(x_snd, t0);
+    /* minimum start time over all inputs: */
+    t0_min = min(x_snd->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 = allpoles_toss_fetch;
+    }
+
+    /* initialize susp state */
+    susp->susp.free = allpoles_free;
+    susp->susp.sr = sr;
+    susp->susp.t0 = t0;
+    susp->susp.mark = allpoles_mark;
+    susp->susp.print_tree = allpoles_print_tree;
+    susp->susp.name = "allpoles";
+    susp->logically_stopped = false;
+    susp->susp.log_stop_cnt = logical_stop_cnt_cvt(x_snd);
+    susp->susp.current = 0;
+    susp->x_snd = x_snd;
+    susp->x_snd_cnt = 0;
+    return sound_create((snd_susp_type)susp, t0, sr, scale_factor);
+}
+
+
+sound_type snd_allpoles(sound_type x_snd, LVAL ak_array, double gain)
+{
+    sound_type x_snd_copy = sound_copy(x_snd);
+    return snd_make_allpoles(x_snd_copy, ak_array, gain);
+}