diff options
Diffstat (limited to 'src/iemlib1/sigpvu.c')
| -rw-r--r-- | src/iemlib1/sigpvu.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/src/iemlib1/sigpvu.c b/src/iemlib1/sigpvu.c new file mode 100644 index 0000000..5dd4ea4 --- /dev/null +++ b/src/iemlib1/sigpvu.c @@ -0,0 +1,206 @@ +/* For information on usage and redistribution, and for a DISCLAIMER OF ALL +* WARRANTIES, see the file, "LICENSE.txt," in this distribution. + +iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2003 */ + +#ifdef NT +#pragma warning( disable : 4244 ) +#pragma warning( disable : 4305 ) +#endif + + +#include "m_pd.h" +#include "iemlib.h" +#include <math.h> +#include <stdio.h> +#include <string.h> + +/* ---------------- pvu~ - simple peak-vu-meter. ----------------- */ + +typedef struct sigpvu +{ + t_object x_obj; + void *x_outlet_meter; + void *x_outlet_over; + void *x_clock; + float x_cur_peak; + float x_old_peak; + float x_threshold_over; + float x_c1; + int x_metro_time; + float x_release_time; + int x_overflow_counter; + int x_started; + float x_msi; +} t_sigpvu; + +t_class *sigpvu_class; +static void sigpvu_tick(t_sigpvu *x); + +static void sigpvu_reset(t_sigpvu *x) +{ + outlet_float(x->x_outlet_over, (t_float)0); + outlet_float(x->x_outlet_meter, -199.9); + x->x_overflow_counter = 0; + x->x_cur_peak = 0.0f; + x->x_old_peak = 0.0f; + clock_delay(x->x_clock, x->x_metro_time); +} + +static void sigpvu_stop(t_sigpvu *x) +{ + clock_unset(x->x_clock); + x->x_started = 0; +} + +static void sigpvu_start(t_sigpvu *x) +{ + clock_delay(x->x_clock, x->x_metro_time); + x->x_started = 1; +} + +static void sigpvu_float(t_sigpvu *x, t_floatarg f) +{ + if(f == 0.0) + { + clock_unset(x->x_clock); + x->x_started = 0; + } + else + { + clock_delay(x->x_clock, x->x_metro_time); + x->x_started = 1; + } +} + +static void sigpvu_t_release(t_sigpvu *x, t_floatarg release_time) +{ + if(release_time <= 20.0f) + release_time = 20.0f; + x->x_release_time = release_time; + x->x_c1 = exp(-(float)x->x_metro_time/(float)release_time); +} + +static void sigpvu_t_metro(t_sigpvu *x, t_floatarg metro_time) +{ + if(metro_time <= 20.0f) + metro_time = 20.0f; + x->x_metro_time = (int)metro_time; + x->x_c1 = exp(-(float)metro_time/(float)x->x_release_time); +} + +static void sigpvu_threshold(t_sigpvu *x, t_floatarg thresh) +{ + x->x_threshold_over = thresh; +} + +static t_int *sigpvu_perform(t_int *w) +{ + float *in = (float *)(w[1]); + t_sigpvu *x = (t_sigpvu *)(w[2]); + int n = (int)(w[3]); + float peak = x->x_cur_peak; + float absolute; + int i; + + if(x->x_started) + { + for(i=0; i<n; i++) + { + absolute = fabs(*in++); + if(absolute > peak) + peak = absolute; + } + x->x_cur_peak = peak; + } + return(w+4); +} + +static void sigpvu_dsp(t_sigpvu *x, t_signal **sp) +{ + dsp_add(sigpvu_perform, 3, sp[0]->s_vec, x, sp[0]->s_n); + clock_delay(x->x_clock, x->x_metro_time); +} + +static void sigpvu_tick(t_sigpvu *x) +{ + float db; + int i; + + x->x_old_peak *= x->x_c1; + /* NAN protect */ + if(PD_BADFLOAT(x->x_old_peak)) + x->x_old_peak = 0.0f; + + if(x->x_cur_peak > x->x_old_peak) + x->x_old_peak = x->x_cur_peak; + if(x->x_old_peak <= 0.0000000001f) + db = -199.9f; + else if(x->x_old_peak > 1000000.0f) + { + db = 120.0f; + x->x_old_peak = 1000000.0f; + } + else + db = 8.6858896381f*log(x->x_old_peak); + if(db >= x->x_threshold_over) + { + x->x_overflow_counter++; + outlet_float(x->x_outlet_over, (t_float)x->x_overflow_counter); + } + outlet_float(x->x_outlet_meter, db); + x->x_cur_peak = 0.0f; + clock_delay(x->x_clock, x->x_metro_time); +} + +static void *sigpvu_new(t_floatarg metro_time, t_floatarg release_time, t_floatarg threshold) +{ + t_sigpvu *x; + float t; + + x = (t_sigpvu *)pd_new(sigpvu_class); + if(metro_time <= 0.0f) + metro_time = 300.0f; + if(metro_time <= 20.0f) + metro_time = 20.0f; + if(release_time <= 0.0f) + release_time = 300.0f; + if(release_time <= 20.0f) + release_time = 20.0f; + if(threshold == 0.0f) + threshold = -0.01f; + x->x_threshold_over = threshold; + x->x_overflow_counter = 0; + x->x_metro_time = (int)metro_time; + x->x_release_time = release_time; + x->x_c1 = exp(-(float)metro_time/(float)release_time); + x->x_cur_peak = 0.0f; + x->x_old_peak = 0.0f; + x->x_clock = clock_new(x, (t_method)sigpvu_tick); + x->x_outlet_meter = outlet_new(&x->x_obj, &s_float);/* left */ + x->x_outlet_over = outlet_new(&x->x_obj, &s_float); /* right */ + x->x_started = 1; + x->x_msi = 0; + return(x); +} + +static void sigpvu_ff(t_sigpvu *x) +{ + clock_free(x->x_clock); +} + +void sigpvu_setup(void ) +{ + sigpvu_class = class_new(gensym("pvu~"), (t_newmethod)sigpvu_new, + (t_method)sigpvu_ff, sizeof(t_sigpvu), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); + CLASS_MAINSIGNALIN(sigpvu_class, t_sigpvu, x_msi); + class_addmethod(sigpvu_class, (t_method)sigpvu_dsp, gensym("dsp"), 0); + class_addfloat(sigpvu_class, sigpvu_float); + class_addmethod(sigpvu_class, (t_method)sigpvu_reset, gensym("reset"), 0); + class_addmethod(sigpvu_class, (t_method)sigpvu_start, gensym("start"), 0); + class_addmethod(sigpvu_class, (t_method)sigpvu_stop, gensym("stop"), 0); + class_addmethod(sigpvu_class, (t_method)sigpvu_t_release, gensym("t_release"), A_FLOAT, 0); + class_addmethod(sigpvu_class, (t_method)sigpvu_t_metro, gensym("t_metro"), A_FLOAT, 0); + class_addmethod(sigpvu_class, (t_method)sigpvu_threshold, gensym("threshold"), A_FLOAT, 0); + class_sethelpsymbol(sigpvu_class, gensym("iemhelp/help-pvu~")); +} |