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authorTom Schouten <doelie@users.sourceforge.net>2006-09-23 19:26:46 +0000
committerTom Schouten <doelie@users.sourceforge.net>2006-09-23 19:26:46 +0000
commit778374ed56938d2e47e91be92903fc9e13a2be09 (patch)
tree76a8a720371d0ca358122c00bc75ef36e5ad85cb /modules/generic
parentd64cafd597a4704284cb4e3517c9481ab7928f6a (diff)
added missing file pdp/pdp_metro.c
svn path=/trunk/externals/pdp/; revision=6005
Diffstat (limited to 'modules/generic')
-rw-r--r--modules/generic/pdp_metro.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/modules/generic/pdp_metro.c b/modules/generic/pdp_metro.c
new file mode 100644
index 0000000..55ad8c5
--- /dev/null
+++ b/modules/generic/pdp_metro.c
@@ -0,0 +1,136 @@
+/*
+ * Pure Data Packet module. Standard sync rates.
+ * Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/* pdp_metro
+ this is the main audio/video sync module. use this if
+ you need to produce synchronized raw output. this uses
+ 'industry standard' integer sampling ratios.
+
+ it works like this. for example, the most awkward 30 * 999/1000 Hz rate.
+
+
+*/
+
+#include "pdp.h"
+
+typedef struct _metro_struct
+{
+ t_object x_obj;
+ t_float x_f;
+ t_clock *x_clock;
+ t_outlet *x_outlet;
+
+ t_int x_count; // current count for (upsampled) audio ticks
+ t_int x_den; // video framerate denominator and nominator
+ t_int x_nom;
+
+} t_metro;
+
+
+
+
+static t_int *metro_perform(t_int *w);
+#define DSP_ARG(type, name, source) type name = (type)source
+static void metro_dsp(t_metro *x, t_signal **sp)
+{
+ dsp_add(metro_perform, 3, x, sp[0]->s_n, (int)sys_getsr());
+}
+static t_int *metro_perform(t_int *w){
+ DSP_ARG(t_metro*, x, w[1]);
+ DSP_ARG(t_int, n, w[2]);
+ DSP_ARG(t_int, sr, w[3]);
+
+ t_int period = sr * x->x_nom;
+ t_int upsample = x->x_den;
+
+ t_int dobang = 0;
+
+ //fprintf(stderr, "%d/%d\t%d\t%d\n", x->x_den, x->x_nom, x->x_count, period);
+ x->x_count += n * upsample;
+ while (x->x_count > period) {
+ dobang = 1;
+ x->x_count -= period;
+ }
+ if (dobang) clock_set(x->x_clock, 0);
+ return w+4;
+}
+static void metro_tick(t_metro *x)
+{
+ outlet_bang(x->x_outlet);
+}
+
+static void metro_reset(t_metro *x){
+ x->x_count = 0;
+}
+static void metro_fps(t_metro *x, t_float fden, t_float fnom)
+{
+ int den = (int)fden;
+ int nom = (int)fnom;
+ if (den < 1) den = 1;
+ if (nom < 1) nom = 1;
+ x->x_den = den;
+ x->x_nom = nom;
+}
+static void metro_free(t_metro *x)
+{
+ clock_unset(x->x_clock);
+}
+
+static t_class *metro_class;
+
+
+
+static void *metro_new(t_symbol *s, int argc, t_atom *argv)
+{
+ t_metro *x = (t_metro *)pd_new(metro_class);
+ x->x_outlet = outlet_new(&x->x_obj, &s_bang);
+ x->x_clock = clock_new(x, (t_method)metro_tick);
+ x->x_count = 0;
+
+ metro_fps(x, 1, 1);
+
+ return (void *)x;
+}
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+void pdp_metro_setup(void)
+{
+
+
+ metro_class = class_new(gensym("pdp_metro~"), (t_newmethod)metro_new,
+ (t_method)metro_free, sizeof(t_metro), 0, A_NULL);
+
+ CLASS_MAINSIGNALIN(metro_class, t_metro, x_f);
+ class_addmethod(metro_class, (t_method)metro_tick, gensym("tick"), A_NULL);
+ class_addmethod(metro_class, (t_method)metro_dsp, gensym("dsp"), A_NULL);
+ class_addmethod(metro_class, (t_method)metro_fps, gensym("fps"), A_FLOAT, A_DEFFLOAT, A_NULL);
+
+
+}
+
+#ifdef __cplusplus
+}
+#endif