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authorCyrille Henry <nusmuk@users.sourceforge.net>2015-09-16 16:59:34 +0000
committerCyrille Henry <nusmuk@users.sourceforge.net>2015-09-16 16:59:34 +0000
commit85b2d2247f811c66cb4b2c4bd5f7f331ebdbe743 (patch)
tree91929a03ee9884973b09bb98b5559aa546e35a36 /nusmuk-utils/tab_derivate.c
parent297a520ab0d1f7084d0ac059e8576c631cd88720 (diff)
new tab manipulation object : integration and derivative
svn path=/trunk/externals/nusmuk/; revision=17566
Diffstat (limited to 'nusmuk-utils/tab_derivate.c')
-rw-r--r--nusmuk-utils/tab_derivate.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/nusmuk-utils/tab_derivate.c b/nusmuk-utils/tab_derivate.c
new file mode 100644
index 0000000..f035b99
--- /dev/null
+++ b/nusmuk-utils/tab_derivate.c
@@ -0,0 +1,84 @@
+#include "m_pd.h"
+
+#define MIN(a,b) (((a)<(b))?(a):(b))
+
+static t_class *tab_derivate_class;
+
+typedef struct _tab_derivate {
+ t_object x_obj;
+ t_symbol *x_arrayname_src1;
+ t_symbol *x_arrayname_dst;
+ t_outlet *b_out;
+} t_tab_derivate;
+
+void *tab_derivate_new(t_symbol *s_src1, t_symbol *s_dst) {
+ t_tab_derivate *x = (t_tab_derivate *)pd_new(tab_derivate_class);
+
+ x->x_arrayname_src1 = s_src1;
+ x->x_arrayname_dst = s_dst;
+
+ x->b_out = outlet_new(&x->x_obj, &s_bang);
+
+ return (void *)x;
+}
+
+void tab_derivate_compute(t_tab_derivate *x, t_float nb) {
+ t_garray *a_src1, *a_dst;
+ int npoints_src1, npoints_dst;
+ t_word *vec_src1, *vec_dst;
+ t_float tmp2, tmp1;
+
+ int nb_derivate, i;
+
+ if (!(a_src1 = (t_garray *)pd_findbyclass(x->x_arrayname_src1, garray_class)))
+ pd_error(x, "%s: no such array", x->x_arrayname_src1->s_name);
+ else if (!garray_getfloatwords(a_src1, &npoints_src1, &vec_src1))
+ pd_error(x, "%s: bad template for tab_derivate", x->x_arrayname_src1->s_name);
+ else if (!(a_dst = (t_garray *)pd_findbyclass(x->x_arrayname_dst, garray_class)))
+ pd_error(x, "%s: no such array", x->x_arrayname_dst->s_name);
+ else if (!garray_getfloatwords(a_dst, &npoints_dst, &vec_dst))
+ pd_error(x, "%s: bad template for tab_derivate", x->x_arrayname_dst->s_name);
+ else
+ {
+ nb_derivate = MIN(npoints_src1, npoints_dst);
+ // post("nb_derivate = %d",nb_derivate);
+
+ if (nb > 0)
+ nb_derivate = MIN(nb_derivate, nb);
+
+ tmp1 = 0;
+ for (i=0; i<nb_derivate;i++) {
+ tmp2 = vec_src1[i].w_float;
+ vec_dst[i].w_float = tmp2 - tmp1;
+ tmp1 = tmp2;
+ }
+ garray_redraw(a_dst);
+ }
+ outlet_bang(x->b_out);
+}
+
+void tab_derivate_bang(t_tab_derivate *x) {
+ tab_derivate_compute(x, -1) ;
+}
+
+void tab_derivate_float(t_tab_derivate *x, t_float nb) {
+ tab_derivate_compute(x, nb) ;
+}
+
+void tab_derivate_src1(t_tab_derivate *x, t_symbol *s_src) {
+ x->x_arrayname_src1 = s_src;
+}
+
+void tab_derivate_dst(t_tab_derivate *x, t_symbol *s_dst) {
+ x->x_arrayname_dst = s_dst;
+}
+
+void tab_derivate_setup(void) {
+ tab_derivate_class = class_new(gensym("tab_derivate"), (t_newmethod)tab_derivate_new,
+ 0, sizeof(t_tab_derivate), CLASS_DEFAULT, A_DEFSYM, A_DEFSYM, A_DEFSYM, 0);
+ class_addbang(tab_derivate_class, tab_derivate_bang);
+ class_addfloat(tab_derivate_class, tab_derivate_float);
+ class_addmethod(tab_derivate_class, (t_method)tab_derivate_src1, gensym("src1"), A_DEFSYM, 0);
+ class_addmethod(tab_derivate_class, (t_method)tab_derivate_dst, gensym("dst"), A_DEFSYM, 0);
+}
+