This commit was generated by cvs2svn to compensate for changes in r1738,svn2git-root

which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/iemlib/; revision=1739

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~"));
+}