1st draft of iem_tab style externals dedicated for upsampling and downsampling a table

svn path=/trunk/externals/nusmuk/; revision=17415

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);  
+} 
+