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authorCyrille Henry <nusmuk@users.sourceforge.net>2015-01-19 18:42:40 +0000
committerCyrille Henry <nusmuk@users.sourceforge.net>2015-01-19 18:42:40 +0000
commitfa165552bc09dd56a5ab7c037303b241a8223f46 (patch)
treef3d7e49bced9c36a646b9530f59c798fa779706e /nusmuk-utils/tab_upsample_copy.c
parent3d002b8a19990b771d94de9ad4cb10b81acafa92 (diff)
1st draft of iem_tab style externals dedicated for upsampling and downsampling a table
svn path=/trunk/externals/nusmuk/; revision=17415
Diffstat (limited to 'nusmuk-utils/tab_upsample_copy.c')
-rw-r--r--nusmuk-utils/tab_upsample_copy.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/nusmuk-utils/tab_upsample_copy.c b/nusmuk-utils/tab_upsample_copy.c
new file mode 100644
index 0000000..5b5687b
--- /dev/null
+++ b/nusmuk-utils/tab_upsample_copy.c
@@ -0,0 +1,93 @@
+#include "m_pd.h"
+
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#define MAX(a,b) (((a)>(b))?(a):(b))
+
+static t_class *tab_upsample_copy_class;
+
+typedef struct _tab_upsample_copy {
+ t_object x_obj;
+ t_symbol *x_arrayname_src;
+ t_symbol *x_arrayname_dst;
+ int factor, offset;
+ t_outlet *b_out;
+} t_tab_upsample_copy;
+
+void *tab_upsample_copy_new(t_symbol *s_src,t_symbol *s_dst, t_float factor)
+{
+ t_tab_upsample_copy *x = (t_tab_upsample_copy *)pd_new(tab_upsample_copy_class);
+
+ x->x_arrayname_src = s_src;
+ x->x_arrayname_dst = s_dst;
+ x->factor = factor;
+ x->offset = 0;
+
+ x->b_out = outlet_new(&x->x_obj, &s_bang);
+
+ return (void *)x;
+}
+
+void tab_upsample_copy_compute(t_tab_upsample_copy *x)
+{
+
+ t_garray *a_src, *a_dst;
+ int npoints_src, npoints_dst;
+ t_word *vec_src, *vec_dst;
+
+ int nb_max, i, j;
+
+ if (!(a_src = (t_garray *)pd_findbyclass(x->x_arrayname_src, garray_class)))
+ pd_error(x, "%s: no such array", x->x_arrayname_src->s_name);
+ else if (!garray_getfloatwords(a_src, &npoints_src, &vec_src))
+ pd_error(x, "%s: bad template for tab_upsample_copy", x->x_arrayname_src->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_upsample_copy", x->x_arrayname_dst->s_name);
+ else
+ {
+ nb_max = MIN(npoints_src*x->factor, npoints_dst-x->offset);
+
+ // post("nb_max = %d",nb_max);
+ for (i=0; i<nb_max;i++) {
+ vec_dst[i+x->offset].w_float = vec_src[i/x->factor].w_float;
+ }
+ garray_redraw(a_dst);
+ }
+ outlet_bang(x->b_out);
+}
+
+ void tab_upsample_copy_bang(t_tab_upsample_copy *x)
+{
+ x->offset = 0;
+ tab_upsample_copy_compute(x) ;
+}
+
+void tab_upsample_copy_float(t_tab_upsample_copy *x, t_float offset)
+{
+ x->offset = offset;
+ tab_upsample_copy_compute(x) ;
+}
+
+void tab_upsample_copy_src(t_tab_upsample_copy *x, t_symbol *s_src) {
+ x->x_arrayname_src = s_src;
+}
+
+void tab_upsample_copy_dst(t_tab_upsample_copy *x, t_symbol *s_dst) {
+ x->x_arrayname_dst = s_dst;
+}
+
+void tab_upsample_copy_factor(t_tab_upsample_copy *x, t_float factor) {
+ x->factor = factor;
+}
+
+void tab_upsample_copy_setup(void) {
+ tab_upsample_copy_class = class_new(gensym("tab_upsample_copy"), (t_newmethod)tab_upsample_copy_new,
+ 0, sizeof(t_tab_upsample_copy), CLASS_DEFAULT, A_DEFSYM, A_DEFSYM, A_DEFFLOAT, 0);
+ class_addbang(tab_upsample_copy_class, tab_upsample_copy_bang);
+ class_addmethod(tab_upsample_copy_class, (t_method)tab_upsample_copy_src, gensym("src"), A_DEFSYM, 0);
+ class_addmethod(tab_upsample_copy_class, (t_method)tab_upsample_copy_dst, gensym("dst"), A_DEFSYM, 0);
+ class_addmethod(tab_upsample_copy_class, (t_method)tab_upsample_copy_factor, gensym("factor"), A_DEFFLOAT, 0);
+ class_addfloat(tab_upsample_copy_class, (t_method)tab_upsample_copy_float);
+}
+