Move library tree where it belongs

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

@@ -0,0 +1,237 @@
+#include "stdio.h"
+#ifndef mips
+#include "stdlib.h"
+#endif
+#include "xlisp.h"
+#include "sound.h"
+
+#include "falloc.h"
+#include "cext.h"
+#include "shape.h"
+
+void shape_free();
+
+
+typedef struct shape_susp_struct {
+    snd_susp_node susp;
+    long terminate_cnt;
+    boolean logically_stopped;
+    sound_type sin;
+    long sin_cnt;
+    sample_block_values_type sin_ptr;
+
+    double time_to_index;
+    double origin;
+    table_type the_table;
+    sample_type *fcn_table;
+    double table_len;
+} shape_susp_node, *shape_susp_type;
+
+
+void shape_s_fetch(register shape_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 time_to_index_reg;
+    register double origin_reg;
+    register sample_type * fcn_table_reg;
+    register double table_len_reg;
+    register sample_type sin_scale_reg = susp->sin->scale;
+    register sample_block_values_type sin_ptr_reg;
+    falloc_sample_block(out, "shape_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 sin input sample block: */
+	susp_check_term_log_samples(sin, sin_ptr, sin_cnt);
+	togo = min(togo, susp->sin_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;
+	time_to_index_reg = susp->time_to_index;
+	origin_reg = susp->origin;
+	fcn_table_reg = susp->fcn_table;
+	table_len_reg = susp->table_len;
+	sin_ptr_reg = susp->sin_ptr;
+	out_ptr_reg = out_ptr;
+	if (n) do { /* the inner sample computation loop */
+
+            register double offset, x1;
+            register long table_index;
+            register double phase = (sin_scale_reg * *sin_ptr_reg++);
+            if (phase > 1.0) phase = 1.0;
+            else if (phase < -1.0) phase = -1.0;
+            offset = (phase + origin_reg) * time_to_index_reg;
+            table_index = (long) offset;
+            if (table_index < 0) { 
+                table_index = 0; 
+                offset = 0;
+            }
+            if (table_index >= table_len_reg) {
+                offset = table_len_reg - 1;
+                table_index = (long) offset;
+            }
+            x1 = fcn_table_reg[table_index];
+            *out_ptr_reg++ = (sample_type) (x1 + (offset - table_index) * 
+                     (fcn_table_reg[table_index + 1] - x1));
+        ;
+	} while (--n); /* inner loop */
+
+	susp->origin = origin_reg;
+	/* using sin_ptr_reg is a bad idea on RS/6000: */
+	susp->sin_ptr += togo;
+	out_ptr += togo;
+	susp_took(sin_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;
+    }
+} /* shape_s_fetch */
+
+
+void shape_toss_fetch(susp, snd_list)
+  register shape_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 sin up to final_time for this block of zeros */
+    while ((round((final_time - susp->sin->t0) * susp->sin->sr)) >=
+	   susp->sin->current)
+	susp_get_samples(sin, sin_ptr, sin_cnt);
+    /* convert to normal processing when we hit final_count */
+    /* we want each signal positioned at final_time */
+    n = round((final_time - susp->sin->t0) * susp->sin->sr -
+         (susp->sin->current - susp->sin_cnt));
+    susp->sin_ptr += n;
+    susp_took(sin_cnt, n);
+    susp->susp.fetch = susp->susp.keep_fetch;
+    (*(susp->susp.fetch))(susp, snd_list);
+}
+
+
+void shape_mark(shape_susp_type susp)
+{
+    sound_xlmark(susp->sin);
+}
+
+
+void shape_free(shape_susp_type susp)
+{
+table_unref(susp->the_table);    sound_unref(susp->sin);
+    ffree_generic(susp, sizeof(shape_susp_node), "shape_free");
+}
+
+
+void shape_print_tree(shape_susp_type susp, int n)
+{
+    indent(n);
+    stdputstr("sin:");
+    sound_print_tree_1(susp->sin, n);
+}
+
+
+sound_type snd_make_shape(sound_type sin, sound_type fn, double origin)
+{
+    register shape_susp_type susp;
+    rate_type sr = sin->sr;
+    time_type t0 = sin->t0;
+    int interp_desc = 0;
+    sample_type scale_factor = 1.0F;
+    time_type t0_min = t0;
+    falloc_generic(susp, shape_susp_node, "snd_make_shape");
+    susp->time_to_index = fn->sr;
+    susp->origin = origin;
+    susp->the_table = sound_to_table(fn);
+    susp->fcn_table = susp->the_table->samples;
+    susp->table_len = susp->the_table->length;
+    susp->susp.fetch = shape_s_fetch;
+    susp->terminate_cnt = UNKNOWN;
+    /* handle unequal start times, if any */
+    if (t0 < sin->t0) sound_prepend_zeros(sin, t0);
+    /* minimum start time over all inputs: */
+    t0_min = min(sin->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 = shape_toss_fetch;
+    }
+
+    /* initialize susp state */
+    susp->susp.free = shape_free;
+    susp->susp.sr = sr;
+    susp->susp.t0 = t0;
+    susp->susp.mark = shape_mark;
+    susp->susp.print_tree = shape_print_tree;
+    susp->susp.name = "shape";
+    susp->logically_stopped = false;
+    susp->susp.log_stop_cnt = logical_stop_cnt_cvt(sin);
+    susp->susp.current = 0;
+    susp->sin = sin;
+    susp->sin_cnt = 0;
+    return sound_create((snd_susp_type)susp, t0, sr, scale_factor);
+}
+
+
+sound_type snd_shape(sound_type sin, sound_type fn, double origin)
+{
+    sound_type sin_copy = sound_copy(sin);
+    return snd_make_shape(sin_copy, fn, origin);
+}