diff options
Diffstat (limited to 'step.c')
| -rw-r--r-- | step.c | 358 |
1 files changed, 179 insertions, 179 deletions
@@ -1,179 +1,179 @@ -/* -------------------------- step ------------------------------------------ */
-/* */
-/* Step to a new value in N milliseconds (similar to line). */
-/* Written by Olaf Matthes (olaf.matthes@gmx.de) */
-/* Get source at http://www.akustische-kunst.org/puredata/maxlib/ */
-/* */
-/* This program is free software; you can redistribute it and/or */
-/* modify it under the terms of the GNU General Public License */
-/* as published by the Free Software Foundation; either version 2 */
-/* of the License, or (at your option) any later version. */
-/* */
-/* This program is distributed in the hope that it will be useful, */
-/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
-/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
-/* GNU General Public License for more details. */
-/* */
-/* You should have received a copy of the GNU General Public License */
-/* along with this program; if not, write to the Free Software */
-/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-/* */
-/* Based on PureData by Miller Puckette and others. */
-/* */
-/* ---------------------------------------------------------------------------- */
-
-#include "m_pd.h"
-
-/* -------------------------- step ------------------------------ */
-static char *version = "step v0.1, written by Olaf Matthes <olaf.matthes@gmx.de>";
-
-static t_class *step_class;
-
-typedef struct _step
-{
- t_object x_obj;
- t_clock *x_clock;
- double x_targettime;
- t_float x_targetval;
- double x_prevtime;
- t_float x_setval;
- int x_gotinlet;
- t_float x_grain; /* time interval for output */
- t_float x_step; /* step size for output */
- t_float x_steptime; /* length for one step */
- t_int x_stepcall;
- double x_1overtimediff;
- double x_in1val;
-} t_step;
-
-static void step_tick(t_step *x)
-{
- t_float outvalue;
- double timenow = clock_getsystime();
- double msectogo = - clock_gettimesince(x->x_targettime);
- if (msectogo < 1E-9)
- {
- outlet_float(x->x_obj.ob_outlet, x->x_targetval);
- }
- else
- {
- if(x->x_setval < x->x_targetval)
- { /* count upwards */
- outvalue = x->x_setval + x->x_stepcall * x->x_step;
- }
- else
- { /* count downwards */
- outvalue = x->x_setval - x->x_stepcall * x->x_step;
- }
- outlet_float(x->x_obj.ob_outlet, outvalue);
- clock_delay(x->x_clock, (x->x_steptime > msectogo ? msectogo : x->x_steptime));
- }
- x->x_stepcall++;
-}
-
-static void step_float(t_step *x, t_float f)
-{
- double timenow = clock_getsystime();
- if (x->x_gotinlet && x->x_in1val > 0 && x->x_step != 0 && f != x->x_setval)
- {
- if (timenow > x->x_targettime) x->x_setval = x->x_targetval;
- else x->x_setval = x->x_setval + x->x_1overtimediff *
- (timenow - x->x_prevtime)
- * (x->x_targetval - x->x_setval);
- x->x_prevtime = timenow;
- x->x_targetval = f; /* where to end */
- x->x_stepcall = 0;
- /* how long does it take ? */
- x->x_targettime = clock_getsystimeafter(x->x_in1val);
- if(x->x_setval < x->x_targetval)
- {
- x->x_steptime = x->x_in1val / (int)((x->x_targetval - x->x_setval) / x->x_step);
- }
- else
- {
- x->x_steptime = x->x_in1val / (int)((x->x_setval - x->x_targetval) / x->x_step);
- }
- // post("steptime %g", x->x_steptime);
- step_tick(x);
- x->x_gotinlet = 0;
- x->x_1overtimediff = 1./ (x->x_targettime - timenow);
- /* call tick function */
- clock_delay(x->x_clock, x->x_steptime);
-
- }
- else
- {
- clock_unset(x->x_clock);
- x->x_targetval = x->x_setval = f;
- outlet_float(x->x_obj.ob_outlet, f);
- }
- x->x_gotinlet = 0;
-}
-
-static void step_ft1(t_step *x, t_floatarg g)
-{
- x->x_in1val = g;
- x->x_gotinlet = 1;
-}
-
-static void step_ft2(t_step *x, t_floatarg g)
-{
- if (g <= 0) g = 1;
- x->x_step = g;
- x->x_gotinlet = 1;
-}
-
-static void step_stop(t_step *x)
-{
- x->x_targetval = x->x_setval;
- clock_unset(x->x_clock);
-}
-
-static void step_free(t_step *x)
-{
- clock_free(x->x_clock);
-}
-
-static void *step_new(t_floatarg f, t_floatarg step, t_floatarg grain)
-{
- t_step *x = (t_step *)pd_new(step_class);
- x->x_targetval = x->x_setval = f;
- x->x_gotinlet = 0;
- x->x_1overtimediff = 1;
- x->x_clock = clock_new(x, (t_method)step_tick);
- x->x_targettime = x->x_prevtime = clock_getsystime();
- if (grain <= 0) grain = 20;
- x->x_grain = grain;
- if (step <= 0) step = 1;
- x->x_step = step;
- outlet_new(&x->x_obj, gensym("float"));
- inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft1"));
- inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft2"));
- return (x);
-}
-
-#ifndef MAXLIB
-void step_setup(void)
-{
- step_class = class_new(gensym("step"), (t_newmethod)step_new,
- (t_method)step_free, sizeof(t_step), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
- class_addmethod(step_class, (t_method)step_ft1, gensym("ft1"), A_FLOAT, 0);
- class_addmethod(step_class, (t_method)step_ft2, gensym("ft2"), A_FLOAT, 0);
- class_addmethod(step_class, (t_method)step_stop, gensym("stop"), 0);
- class_addfloat(step_class, (t_method)step_float);
-
- post(version);
-}
-#else
-void maxlib_step_setup(void)
-{
- step_class = class_new(gensym("maxlib_step"), (t_newmethod)step_new,
- (t_method)step_free, sizeof(t_step), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
- class_addcreator((t_newmethod)step_new, gensym("step"), A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
- class_addmethod(step_class, (t_method)step_ft1, gensym("ft1"), A_FLOAT, 0);
- class_addmethod(step_class, (t_method)step_ft2, gensym("ft2"), A_FLOAT, 0);
- class_addmethod(step_class, (t_method)step_stop, gensym("stop"), 0);
- class_addfloat(step_class, (t_method)step_float);
- class_sethelpsymbol(step_class, gensym("maxlib/step-help.pd"));
-}
-#endif
+/* -------------------------- step ------------------------------------------ */ +/* */ +/* Step to a new value in N milliseconds (similar to line). */ +/* Written by Olaf Matthes (olaf.matthes@gmx.de) */ +/* Get source at http://www.akustische-kunst.org/puredata/maxlib/ */ +/* */ +/* This program is free software; you can redistribute it and/or */ +/* modify it under the terms of the GNU General Public License */ +/* as published by the Free Software Foundation; either version 2 */ +/* of the License, or (at your option) any later version. */ +/* */ +/* This program is distributed in the hope that it will be useful, */ +/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ +/* GNU General Public License for more details. */ +/* */ +/* You should have received a copy of the GNU General Public License */ +/* along with this program; if not, write to the Free Software */ +/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +/* */ +/* Based on PureData by Miller Puckette and others. */ +/* */ +/* ---------------------------------------------------------------------------- */ + +#include "m_pd.h" + +/* -------------------------- step ------------------------------ */ +static char *version = "step v0.1, written by Olaf Matthes <olaf.matthes@gmx.de>"; + +static t_class *step_class; + +typedef struct _step +{ + t_object x_obj; + t_clock *x_clock; + double x_targettime; + t_float x_targetval; + double x_prevtime; + t_float x_setval; + int x_gotinlet; + t_float x_grain; /* time interval for output */ + t_float x_step; /* step size for output */ + t_float x_steptime; /* length for one step */ + t_int x_stepcall; + double x_1overtimediff; + double x_in1val; +} t_step; + +static void step_tick(t_step *x) +{ + t_float outvalue; + double timenow = clock_getsystime(); + double msectogo = - clock_gettimesince(x->x_targettime); + if (msectogo < 1E-9) + { + outlet_float(x->x_obj.ob_outlet, x->x_targetval); + } + else + { + if(x->x_setval < x->x_targetval) + { /* count upwards */ + outvalue = x->x_setval + x->x_stepcall * x->x_step; + } + else + { /* count downwards */ + outvalue = x->x_setval - x->x_stepcall * x->x_step; + } + outlet_float(x->x_obj.ob_outlet, outvalue); + clock_delay(x->x_clock, (x->x_steptime > msectogo ? msectogo : x->x_steptime)); + } + x->x_stepcall++; +} + +static void step_float(t_step *x, t_float f) +{ + double timenow = clock_getsystime(); + if (x->x_gotinlet && x->x_in1val > 0 && x->x_step != 0 && f != x->x_setval) + { + if (timenow > x->x_targettime) x->x_setval = x->x_targetval; + else x->x_setval = x->x_setval + x->x_1overtimediff * + (timenow - x->x_prevtime) + * (x->x_targetval - x->x_setval); + x->x_prevtime = timenow; + x->x_targetval = f; /* where to end */ + x->x_stepcall = 0; + /* how long does it take ? */ + x->x_targettime = clock_getsystimeafter(x->x_in1val); + if(x->x_setval < x->x_targetval) + { + x->x_steptime = x->x_in1val / (int)((x->x_targetval - x->x_setval) / x->x_step); + } + else + { + x->x_steptime = x->x_in1val / (int)((x->x_setval - x->x_targetval) / x->x_step); + } + // post("steptime %g", x->x_steptime); + step_tick(x); + x->x_gotinlet = 0; + x->x_1overtimediff = 1./ (x->x_targettime - timenow); + /* call tick function */ + clock_delay(x->x_clock, x->x_steptime); + + } + else + { + clock_unset(x->x_clock); + x->x_targetval = x->x_setval = f; + outlet_float(x->x_obj.ob_outlet, f); + } + x->x_gotinlet = 0; +} + +static void step_ft1(t_step *x, t_floatarg g) +{ + x->x_in1val = g; + x->x_gotinlet = 1; +} + +static void step_ft2(t_step *x, t_floatarg g) +{ + if (g <= 0) g = 1; + x->x_step = g; + x->x_gotinlet = 1; +} + +static void step_stop(t_step *x) +{ + x->x_targetval = x->x_setval; + clock_unset(x->x_clock); +} + +static void step_free(t_step *x) +{ + clock_free(x->x_clock); +} + +static void *step_new(t_floatarg f, t_floatarg step, t_floatarg grain) +{ + t_step *x = (t_step *)pd_new(step_class); + x->x_targetval = x->x_setval = f; + x->x_gotinlet = 0; + x->x_1overtimediff = 1; + x->x_clock = clock_new(x, (t_method)step_tick); + x->x_targettime = x->x_prevtime = clock_getsystime(); + if (grain <= 0) grain = 20; + x->x_grain = grain; + if (step <= 0) step = 1; + x->x_step = step; + outlet_new(&x->x_obj, gensym("float")); + inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft1")); + inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft2")); + return (x); +} + +#ifndef MAXLIB +void step_setup(void) +{ + step_class = class_new(gensym("step"), (t_newmethod)step_new, + (t_method)step_free, sizeof(t_step), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); + class_addmethod(step_class, (t_method)step_ft1, gensym("ft1"), A_FLOAT, 0); + class_addmethod(step_class, (t_method)step_ft2, gensym("ft2"), A_FLOAT, 0); + class_addmethod(step_class, (t_method)step_stop, gensym("stop"), 0); + class_addfloat(step_class, (t_method)step_float); + + logpost(NULL, 4, version); +} +#else +void maxlib_step_setup(void) +{ + step_class = class_new(gensym("maxlib_step"), (t_newmethod)step_new, + (t_method)step_free, sizeof(t_step), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); + class_addcreator((t_newmethod)step_new, gensym("step"), A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); + class_addmethod(step_class, (t_method)step_ft1, gensym("ft1"), A_FLOAT, 0); + class_addmethod(step_class, (t_method)step_ft2, gensym("ft2"), A_FLOAT, 0); + class_addmethod(step_class, (t_method)step_stop, gensym("stop"), 0); + class_addfloat(step_class, (t_method)step_float); + class_sethelpsymbol(step_class, gensym("maxlib/step-help.pd")); +} +#endif |