tools/evmon.c

   1 /*
   2     Copyright (C) 2007 Paul Davis
   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
  19 #include <stdio.h>
  20 #include <errno.h>
  21 #include <unistd.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24
  25 #include <jack/jack.h>
  26
  27 void
  28 port_callback (jack_port_id_t port, int yn, void* arg)
  29 {
  30         printf ("Port %d %s\n", port, (yn ? "registered" : "unregistered"));
  31 }
  32
  33 void
  34 connect_callback (jack_port_id_t a, jack_port_id_t b, int yn, void* arg)
  35 {
  36         printf ("Ports %d and %d %s\n", a, b, (yn ? "connected" : "disconnected"));
  37 }
  38
  39 void
  40 client_callback (const char* client, int yn, void* arg)
  41 {
  42         printf ("Client %s %s\n", client, (yn ? "registered" : "unregistered"));
  43 }
  44
  45 int
  46 graph_callback (void* arg)
  47 {
  48         printf ("Graph reordered\n");
  49         return 0;
  50 }
  51
  52 int
  53 main (int argc, char *argv[])
  54 {
  55         jack_client_t *client;
  56         jack_options_t options = JackNullOption;
  57         jack_status_t status;
  58
  59         if ((client = jack_client_open ("event-monitor", options, &status, NULL)) == 0) {
  60                 fprintf (stderr, "jack_client_open() failed, "
  61                          "status = 0x%2.0x\n", status);
  62                 if (status & JackServerFailed) {
  63                         fprintf (stderr, "Unable to connect to JACK server\n");
  64                 }
  65                 return 1;
  66         }
  67
  68         if (jack_set_port_registration_callback (client, port_callback, NULL)) {
  69                 fprintf (stderr, "cannot set port registration callback\n");
  70                 return 1;
  71         }
  72         if (jack_set_port_connect_callback (client, connect_callback, NULL)) {
  73                 fprintf (stderr, "cannot set port connect callback\n");
  74                 return 1;
  75         }
  76         if (jack_set_client_registration_callback (client, client_callback, NULL)) {
  77                 fprintf (stderr, "cannot set client registration callback\n");
  78                 return 1;
  79         }
  80         if (jack_set_graph_order_callback (client, graph_callback, NULL)) {
  81                 fprintf (stderr, "cannot set graph order registration callback\n");
  82                 return 1;
  83         }
  84         if (jack_activate (client)) {
  85                 fprintf (stderr, "cannot activate client");
  86                 return 1;
  87         }
  88
  89         sleep (-1);
  90         exit (0);
  91 }
  92