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         sleep(1);
  39     }
  40
  41     return 0;
  42 }
  43
  44 static void
  45 shutdown (void *arg)
  46 {
  47     printf("shutdown \n");
  48     running = 0;
  49 }
  50
  51 int
  52 main (int argc, char *argv[])
  53 {
  54         jack_client_t* client = NULL;
  55     /* try to become a client of the JACK server */
  56         if ((client = jack_client_open ("zombie", JackNullOption, NULL)) == 0) {
  57                 fprintf (stderr, "JACK server not running?\n");
  58                 goto error;
  59         }
  60
  61     jack_set_process_callback (client, process, NULL);
  62     jack_on_shutdown(client, shutdown, NULL);
  63     output_port = jack_port_register (client, "port1", JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
  64
  65         /* tell the JACK server that we are ready to roll */
  66         if (jack_activate (client)) {
  67                 fprintf (stderr, "cannot activate client");
  68                 goto error;
  69         }
  70
  71     jack_connect(client, jack_port_name(output_port), "coreaudio:Built-in Audio:in2");
  72
  73     while (running) {
  74         sleep(1);
  75         printf ("run\n");
  76     }
  77
  78     jack_deactivate (client);
  79         jack_client_close (client);
  80         return 0;
  81
  82 error:
  83     if (client)
  84         jack_client_close (client);
  85     return 1;
  86 }
  87