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-rw-r--r--src/iemlib1/prvu~.c274
1 files changed, 274 insertions, 0 deletions
diff --git a/src/iemlib1/prvu~.c b/src/iemlib1/prvu~.c
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--- /dev/null
+++ b/src/iemlib1/prvu~.c
@@ -0,0 +1,274 @@
+/* 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 - 2005 */
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include <math.h>
+
+/* ---------------- prvu~ - simple peak&rms-vu-meter. ----------------- */
+
+typedef struct _prvu_tilde
+{
+ t_object x_obj;
+ t_atom x_at[3];
+ void *x_clock_metro;
+ t_float x_metro_time;
+ void *x_clock_hold;
+ t_float x_hold_time;
+ t_float x_cur_peak;
+ t_float x_old_peak;
+ t_float x_hold_peak;
+ int x_hold;
+ t_float x_sum_rms;
+ t_float x_old_rms;
+ t_float x_rcp;
+ t_float x_sr;
+ t_float x_threshold_over;
+ int x_overflow_counter;
+ t_float x_release_time;
+ t_float x_c1;
+ int x_started;
+ t_float x_msi;
+} t_prvu_tilde;
+
+t_class *prvu_tilde_class;
+static void prvu_tilde_tick_metro(t_prvu_tilde *x);
+static void prvu_tilde_tick_hold(t_prvu_tilde *x);
+
+static void prvu_tilde_reset(t_prvu_tilde *x)
+{
+ x->x_at[0].a_w.w_float = -99.9f;
+ x->x_at[1].a_w.w_float = -99.9f;
+ x->x_at[2].a_w.w_float = 0.0f;
+ outlet_list(x->x_obj.ob_outlet, &s_list, 3, x->x_at);
+ x->x_overflow_counter = 0;
+ x->x_cur_peak = 0.0f;
+ x->x_old_peak = 0.0f;
+ x->x_hold_peak = 0.0f;
+ x->x_sum_rms = 0.0f;
+ x->x_old_rms = 0.0f;
+ x->x_hold = 0;
+ clock_unset(x->x_clock_hold);
+ clock_delay(x->x_clock_metro, x->x_metro_time);
+}
+
+static void prvu_tilde_stop(t_prvu_tilde *x)
+{
+ clock_unset(x->x_clock_metro);
+ x->x_started = 0;
+}
+
+static void prvu_tilde_start(t_prvu_tilde *x)
+{
+ clock_delay(x->x_clock_metro, x->x_metro_time);
+ x->x_started = 1;
+}
+
+static void prvu_tilde_float(t_prvu_tilde *x, t_floatarg f)
+{
+ if(f == 0.0)
+ {
+ clock_unset(x->x_clock_metro);
+ x->x_started = 0;
+ }
+ else
+ {
+ clock_delay(x->x_clock_metro, x->x_metro_time);
+ x->x_started = 1;
+ }
+}
+
+static void prvu_tilde_t_release(t_prvu_tilde *x, t_floatarg release_time)
+{
+ if(release_time <= 5.0f)
+ release_time = 5.0f;
+ x->x_release_time = release_time;
+ x->x_c1 = exp(-2.0f*x->x_metro_time/x->x_release_time);
+}
+
+static void prvu_tilde_t_metro(t_prvu_tilde *x, t_floatarg metro_time)
+{
+ if(metro_time <= 5.0f)
+ metro_time = 5.0f;
+ x->x_metro_time = metro_time;
+ x->x_c1 = exp(-2.0f*x->x_metro_time/x->x_release_time);
+ x->x_rcp = 1.0f/(x->x_sr*(t_float)x->x_metro_time);
+}
+
+static void prvu_tilde_t_hold(t_prvu_tilde *x, t_floatarg hold_time)
+{
+ if(hold_time <= 5.0f)
+ hold_time = 5.0f;
+ x->x_hold_time = hold_time;
+}
+
+static void prvu_tilde_threshold(t_prvu_tilde *x, t_floatarg thresh)
+{
+ x->x_threshold_over = thresh;
+}
+
+static t_int *prvu_tilde_perform(t_int *w)
+{
+ t_float *in = (t_float *)(w[1]);
+ t_prvu_tilde *x = (t_prvu_tilde *)(w[2]);
+ int n = (int)(w[3]);
+ t_float peak = x->x_cur_peak, pow, sum=x->x_sum_rms;
+ int i;
+
+ if(x->x_started)
+ {
+ for(i=0; i<n; i++)
+ {
+ pow = in[i]*in[i];
+ if(pow > peak)
+ peak = pow;
+ sum += pow;
+ }
+ x->x_cur_peak = peak;
+ x->x_sum_rms = sum;
+ }
+ return(w+4);
+}
+
+static void prvu_tilde_dsp(t_prvu_tilde *x, t_signal **sp)
+{
+ x->x_sr = 0.001*(t_float)sp[0]->s_sr;
+ x->x_rcp = 1.0f/(x->x_sr*x->x_metro_time);
+ dsp_add(prvu_tilde_perform, 3, sp[0]->s_vec, x, sp[0]->s_n);
+ clock_delay(x->x_clock_metro, x->x_metro_time);
+}
+
+static void prvu_tilde_tick_hold(t_prvu_tilde *x)
+{
+ x->x_hold = 0;
+ x->x_hold_peak = x->x_old_peak;
+}
+
+static void prvu_tilde_tick_metro(t_prvu_tilde *x)
+{
+ t_float dbr, dbp, cur_rms, c1=x->x_c1;
+
+ x->x_old_peak *= c1;
+ /* NAN protect */
+ if(IEM_DENORMAL(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 > x->x_hold_peak)
+ {
+ x->x_hold = 1;
+ x->x_hold_peak = x->x_old_peak;
+ clock_delay(x->x_clock_hold, x->x_hold_time);
+ }
+ if(!x->x_hold)
+ x->x_hold_peak = x->x_old_peak;
+ if(x->x_hold_peak <= 0.0000000001f)
+ dbp = -99.9f;
+ else if(x->x_hold_peak > 1000000.0f)
+ {
+ dbp = 60.0f;
+ x->x_hold_peak = 1000000.0f;
+ x->x_old_peak = 1000000.0f;
+ }
+ else
+ dbp = 4.3429448195f*log(x->x_hold_peak);
+ x->x_cur_peak = 0.0f;
+ if(dbp >= x->x_threshold_over)
+ x->x_overflow_counter++;
+ x->x_at[1].a_w.w_float = dbp;
+ x->x_at[2].a_w.w_float = (t_float)x->x_overflow_counter;
+
+ cur_rms = (1.0f - c1)*x->x_sum_rms*x->x_rcp + c1*x->x_old_rms;
+ /* NAN protect */
+ if(IEM_DENORMAL(cur_rms))
+ cur_rms = 0.0f;
+
+ if(cur_rms <= 0.0000000001f)
+ dbr = -99.9f;
+ else if(cur_rms > 1000000.0f)
+ {
+ dbr = 60.0f;
+ x->x_old_rms = 1000000.0f;
+ }
+ else
+ dbr = 4.3429448195f*log(cur_rms);
+ x->x_sum_rms = 0.0f;
+ x->x_old_rms = cur_rms;
+ x->x_at[0].a_w.w_float = dbr;
+ outlet_list(x->x_obj.ob_outlet, &s_list, 3, x->x_at);
+ clock_delay(x->x_clock_metro, x->x_metro_time);
+}
+
+static void prvu_tilde_ff(t_prvu_tilde *x)
+{
+ clock_free(x->x_clock_metro);
+ clock_free(x->x_clock_hold);
+}
+
+static void *prvu_tilde_new(t_floatarg metro_time, t_floatarg hold_time,
+ t_floatarg release_time, t_floatarg threshold)
+{
+ t_prvu_tilde *x;
+ t_float t;
+ int i;
+
+ x = (t_prvu_tilde *)pd_new(prvu_tilde_class);
+ if(metro_time <= 0.0f)
+ metro_time = 300.0f;
+ if(metro_time <= 5.0f)
+ metro_time = 5.0f;
+ if(release_time <= 0.0f)
+ release_time = 300.0f;
+ if(release_time <= 5.0f)
+ release_time = 5.0f;
+ if(hold_time <= 0.0f)
+ hold_time = 1000.0f;
+ if(hold_time <= 5.0f)
+ hold_time = 5.0f;
+ if(threshold == 0.0f)
+ threshold = -0.01f;
+ x->x_metro_time = metro_time;
+ x->x_release_time = release_time;
+ x->x_hold_time = hold_time;
+ x->x_threshold_over = threshold;
+ x->x_c1 = exp(-2.0f*x->x_metro_time/x->x_release_time);
+ x->x_cur_peak = 0.0f;
+ x->x_old_peak = 0.0f;
+ x->x_hold_peak = 0.0f;
+ x->x_hold = 0;
+ x->x_sum_rms = 0.0f;
+ x->x_old_rms = 0.0f;
+ x->x_sr = 44.1f;
+ x->x_rcp = 1.0f/(x->x_sr*x->x_metro_time);
+ x->x_overflow_counter = 0;
+ x->x_clock_metro = clock_new(x, (t_method)prvu_tilde_tick_metro);
+ x->x_clock_hold = clock_new(x, (t_method)prvu_tilde_tick_hold);
+ x->x_started = 1;
+ outlet_new(&x->x_obj, &s_list);
+ x->x_at[0].a_type = A_FLOAT;
+ x->x_at[1].a_type = A_FLOAT;
+ x->x_at[2].a_type = A_FLOAT;
+ x->x_msi = 0.0f;
+ return(x);
+}
+
+void prvu_tilde_setup(void)
+{
+ prvu_tilde_class = class_new(gensym("prvu~"), (t_newmethod)prvu_tilde_new,
+ (t_method)prvu_tilde_ff, sizeof(t_prvu_tilde), 0,
+ A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
+ CLASS_MAINSIGNALIN(prvu_tilde_class, t_prvu_tilde, x_msi);
+ class_addmethod(prvu_tilde_class, (t_method)prvu_tilde_dsp, gensym("dsp"), 0);
+ class_addfloat(prvu_tilde_class, prvu_tilde_float);
+ class_addmethod(prvu_tilde_class, (t_method)prvu_tilde_reset, gensym("reset"), 0);
+ class_addmethod(prvu_tilde_class, (t_method)prvu_tilde_start, gensym("start"), 0);
+ class_addmethod(prvu_tilde_class, (t_method)prvu_tilde_stop, gensym("stop"), 0);
+ class_addmethod(prvu_tilde_class, (t_method)prvu_tilde_t_release, gensym("t_release"), A_FLOAT, 0);
+ class_addmethod(prvu_tilde_class, (t_method)prvu_tilde_t_metro, gensym("t_metro"), A_FLOAT, 0);
+ class_addmethod(prvu_tilde_class, (t_method)prvu_tilde_t_hold, gensym("t_hold"), A_FLOAT, 0);
+ class_addmethod(prvu_tilde_class, (t_method)prvu_tilde_threshold, gensym("threshold"), A_FLOAT, 0);
+ class_sethelpsymbol(prvu_tilde_class, gensym("iemhelp/help-prvu~"));
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-04-16 17:28:40 +0000