Move library tree where it belongs

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

@@ -0,0 +1,202 @@
+#include "stdio.h"
+#ifndef mips
+#include "stdlib.h"
+#endif
+#include "xlisp.h"
+#include "sound.h"
+
+#include "falloc.h"
+#include "cext.h"
+#include "quantize.h"
+
+void quantize_free();
+
+
+typedef struct quantize_susp_struct {
+    snd_susp_node susp;
+    long terminate_cnt;
+    boolean logically_stopped;
+    sound_type s1;
+    long s1_cnt;
+    sample_block_values_type s1_ptr;
+
+    double factor;
+} quantize_susp_node, *quantize_susp_type;
+
+
+void quantize_n_fetch(register quantize_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 factor_reg;
+    register sample_block_values_type s1_ptr_reg;
+    falloc_sample_block(out, "quantize_n_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 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;
+	factor_reg = susp->factor;
+	s1_ptr_reg = susp->s1_ptr;
+	out_ptr_reg = out_ptr;
+	if (n) do { /* the inner sample computation loop */
+register long xx = (long) (*s1_ptr_reg++ * factor_reg); *out_ptr_reg++ = (float) xx;;
+	} while (--n); /* inner loop */
+
+	/* 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;
+    }
+} /* quantize_n_fetch */
+
+
+void quantize_toss_fetch(susp, snd_list)
+  register quantize_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);
+    /* 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);
+    susp->susp.fetch = susp->susp.keep_fetch;
+    (*(susp->susp.fetch))(susp, snd_list);
+}
+
+
+void quantize_mark(quantize_susp_type susp)
+{
+    sound_xlmark(susp->s1);
+}
+
+
+void quantize_free(quantize_susp_type susp)
+{
+    sound_unref(susp->s1);
+    ffree_generic(susp, sizeof(quantize_susp_node), "quantize_free");
+}
+
+
+void quantize_print_tree(quantize_susp_type susp, int n)
+{
+    indent(n);
+    stdputstr("s1:");
+    sound_print_tree_1(susp->s1, n);
+}
+
+
+sound_type snd_make_quantize(sound_type s1, long steps)
+{
+    register quantize_susp_type susp;
+    rate_type sr = s1->sr;
+    time_type t0 = s1->t0;
+    int interp_desc = 0;
+    sample_type scale_factor = 1.0F;
+    time_type t0_min = t0;
+    falloc_generic(susp, quantize_susp_node, "snd_make_quantize");
+    susp->factor = s1->scale * steps; scale_factor = (sample_type) (1.0 / steps);;
+    susp->susp.fetch = quantize_n_fetch;
+    susp->terminate_cnt = UNKNOWN;
+    /* handle unequal start times, if any */
+    if (t0 < s1->t0) sound_prepend_zeros(s1, t0);
+    /* minimum start time over all inputs: */
+    t0_min = min(s1->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 = quantize_toss_fetch;
+    }
+
+    /* initialize susp state */
+    susp->susp.free = quantize_free;
+    susp->susp.sr = sr;
+    susp->susp.t0 = t0;
+    susp->susp.mark = quantize_mark;
+    susp->susp.print_tree = quantize_print_tree;
+    susp->susp.name = "quantize";
+    susp->logically_stopped = false;
+    susp->susp.log_stop_cnt = logical_stop_cnt_cvt(s1);
+    susp->susp.current = 0;
+    susp->s1 = s1;
+    susp->s1_cnt = 0;
+    return sound_create((snd_susp_type)susp, t0, sr, scale_factor);
+}
+
+
+sound_type snd_quantize(sound_type s1, long steps)
+{
+    sound_type s1_copy = sound_copy(s1);
+    return snd_make_quantize(s1_copy, steps);
+}