example-clients/zombie.c

   1 /*
   2     Copyright (C) 2002 Jeremy Hall
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18     $Id: zombie.c,v 1.1 2005/08/18 11:42:08 letz Exp $
  19 */
  20
  21 #include <stdio.h>
  22 #include <errno.h>
  23 #include <unistd.h>
  24 #include <string.h>
  25 #include <stdlib.h>
  26 #include <jack/jack.h>
  27
  28 int running = 1;
  29 int count = 0;
  30 jack_port_t* output_port;
  31
  32 static int
  33 process(jack_nframes_t nframes, void* arg)
  34 {
  35         if (count++ == 1000) {
  36         printf("process block\n");
  37         //while (1) {}
  38 #if WIN32
  39         Sleep(1*1000);
  40 #else
  41         sleep(1);
  42 #endif
  43     }
  44
  45     return 0;
  46 }
  47
  48 static void
  49 shutdown_handler (void *arg)
  50 {
  51     printf("shutdown \n");
  52     running = 0;
  53 }
  54
  55 int
  56 main (int argc, char *argv[])
  57 {
  58         jack_client_t* client = NULL;
  59     /* try to become a client of the JACK server */
  60         if ((client = jack_client_open ("zombie", JackNullOption, NULL)) == 0) {
  61                 fprintf (stderr, "JACK server not running?\n");
  62                 goto error;
  63         }
  64
  65     jack_set_process_callback (client, process, NULL);
  66     jack_on_shutdown(client, shutdown_handler, NULL);
  67     output_port = jack_port_register (client, "port1", JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
  68
  69         /* tell the JACK server that we are ready to roll */
  70         if (jack_activate (client)) {
  71                 fprintf (stderr, "cannot activate client");
  72                 goto error;
  73         }
  74
  75     jack_connect(client, jack_port_name(output_port), "coreaudio:Built-in Audio:in2");
  76
  77     while (running) {
  78 #if WIN32
  79         Sleep(1*1000);
  80 #else
  81         sleep(1);
  82 #endif
  83         printf ("run\n");
  84     }
  85
  86     jack_deactivate (client);
  87         jack_client_close (client);
  88         return 0;
  89
  90 error:
  91     if (client)
  92         jack_client_close (client);
  93     return 1;
  94 }
  95