diff options
author | Tom Schouten <doelie@users.sourceforge.net> | 2006-09-23 19:26:46 +0000 |
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committer | Tom Schouten <doelie@users.sourceforge.net> | 2006-09-23 19:26:46 +0000 |
commit | 778374ed56938d2e47e91be92903fc9e13a2be09 (patch) | |
tree | 76a8a720371d0ca358122c00bc75ef36e5ad85cb /modules | |
parent | d64cafd597a4704284cb4e3517c9481ab7928f6a (diff) |
added missing file pdp/pdp_metro.c
svn path=/trunk/externals/pdp/; revision=6005
Diffstat (limited to 'modules')
-rw-r--r-- | modules/generic/pdp_metro.c | 136 |
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 |