diff options
Diffstat (limited to 'desiredata/doc/6.externs/dspobj~.c')
-rw-r--r-- | desiredata/doc/6.externs/dspobj~.c | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/desiredata/doc/6.externs/dspobj~.c b/desiredata/doc/6.externs/dspobj~.c deleted file mode 100644 index 5c3fa86b..00000000 --- a/desiredata/doc/6.externs/dspobj~.c +++ /dev/null @@ -1,67 +0,0 @@ -#include "m_pd.h" -#ifdef NT -#pragma warning( disable : 4244 ) -#pragma warning( disable : 4305 ) -#endif - -/* ------------------------ dspobj~ ----------------------------- */ - -/* tilde object to take absolute value. */ - -static t_class *dspobj_class; - -typedef struct _dspobj -{ - t_object x_obj; /* obligatory header */ - t_float x_f; /* place to hold inlet's value if it's set by message */ -} t_dspobj; - - /* this is the actual performance routine which acts on the samples. - It's called with a single pointer "w" which is our location in the - DSP call list. We return a new "w" which will point to the next item - after us. Meanwhile, w[0] is just a pointer to dsp-perform itself - (no use to us), w[1] and w[2] are the input and output vector locations, - and w[3] is the number of points to calculate. */ -static t_int *dspobj_perform(t_int *w) -{ - t_float *in = (t_float *)(w[1]); - t_float *out = (t_float *)(w[2]); - int n = (int)(w[3]); - while (n--) - { - float f = *(in++); - *out++ = (f > 0 ? f : -f); - } - return (w+4); -} - - /* called to start DSP. Here we call Pd back to add our perform - routine to a linear callback list which Pd in turn calls to grind - out the samples. */ -static void dspobj_dsp(t_dspobj *x, t_signal **sp) -{ - dsp_add(dspobj_perform, 3, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n); -} - -static void *dspobj_new(void) -{ - t_dspobj *x = (t_dspobj *)pd_new(dspobj_class); - outlet_new(&x->x_obj, gensym("signal")); - x->x_f = 0; - return (x); -} - - /* this routine, which must have exactly this name (with the "~" replaced - by "_tilde) is called when the code is first loaded, and tells Pd how - to build the "class". */ -void dspobj_tilde_setup(void) -{ - dspobj_class = class_new(gensym("dspobj~"), (t_newmethod)dspobj_new, 0, - sizeof(t_dspobj), 0, A_DEFFLOAT, 0); - /* this is magic to declare that the leftmost, "main" inlet - takes signals; other signal inlets are done differently... */ - CLASS_MAINSIGNALIN(dspobj_class, t_dspobj, x_f); - /* here we tell Pd about the "dsp" method, which is called back - when DSP is turned on. */ - class_addmethod(dspobj_class, (t_method)dspobj_dsp, gensym("dsp"), 0); -} |