tools/connect.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 */
  19
  20 #include <stdio.h>
  21 #include <errno.h>
  22 #include <unistd.h>
  23 #include <string.h>
  24 #include <stdlib.h>
  25 #include <getopt.h>
  26
  27 #include <config.h>
  28
  29 #include <jack/jack.h>
  30
  31 #define TRUE 1
  32 #define FALSE 0
  33
  34 void
  35 show_version (char *my_name)
  36 {
  37         fprintf (stderr, "%s: JACK Audio Connection Kit version " VERSION "\n", my_name);
  38 }
  39
  40 void
  41 show_usage (char *my_name)
  42 {
  43         show_version (my_name);
  44         fprintf (stderr, "\nusage: %s [options] port1 port2\n", my_name);
  45         fprintf (stderr, "Connects two JACK ports together.\n\n");
  46         fprintf (stderr, "        -s, --server <name>   Connect to the jack server named <name>\n");
  47         fprintf (stderr, "        -v, --version         Output version information and exit\n");
  48         fprintf (stderr, "        -h, --help            Display this help message\n\n");
  49         fprintf (stderr, "For more information see http://jackaudio.org/\n");
  50 }
  51
  52 int
  53 main (int argc, char *argv[])
  54 {
  55         jack_client_t *client;
  56         jack_status_t status;
  57         char *server_name = NULL;
  58         int c;
  59         int option_index;
  60         jack_options_t options = JackNoStartServer;
  61         char *my_name = strrchr(argv[0], '/');
  62         jack_port_t *src_port = 0;
  63         jack_port_t *dst_port = 0;
  64         jack_port_t *port1 = 0;
  65         jack_port_t *port2 = 0;
  66         int connecting, disconnecting;
  67         int port1_flags, port2_flags;
  68
  69         struct option long_options[] = {
  70             { "server", 1, 0, 's' },
  71             { "help", 0, 0, 'h' },
  72             { "version", 0, 0, 'v' },
  73             { 0, 0, 0, 0 }
  74         };
  75
  76         while ((c = getopt_long (argc, argv, "s:hv", long_options, &option_index)) >= 0) {
  77                 switch (c) {
  78                 case 's':
  79                         server_name = (char *) malloc (sizeof (char) * strlen(optarg));
  80                         strcpy (server_name, optarg);
  81                         options |= JackServerName;
  82                         break;
  83                 case 'h':
  84                         show_usage (my_name);
  85                         return 1;
  86                         break;
  87                 case 'v':
  88                         show_version (my_name);
  89                         return 1;
  90                         break;
  91                 default:
  92                         show_usage (my_name);
  93                         return 1;
  94                         break;
  95                 }
  96         }
  97
  98         connecting = disconnecting = FALSE;
  99         if (my_name == 0) {
 100                 my_name = argv[0];
 101         } else {
 102                 my_name ++;
 103         }
 104
 105         if (strstr(my_name, "disconnect")) {
 106                 disconnecting = 1;
 107         } else if (strstr(my_name, "connect")) {
 108                 connecting = 1;
 109         } else {
 110                 fprintf(stderr, "ERROR! client should be called jack_connect or jack_disconnect. client is called %s\n", my_name);
 111                 return 1;
 112         }
 113
 114         if (argc < 3) show_usage(my_name);
 115
 116         /* try to become a client of the JACK server */
 117
 118         if ((client = jack_client_open (my_name, options, &status, server_name)) == 0) {
 119                 fprintf (stderr, "jack server not running?\n");
 120                 return 1;
 121         }
 122
 123         /* find the two ports */
 124
 125         if ((port1 = jack_port_by_name(client, argv[argc-1])) == 0) {
 126                 fprintf (stderr, "ERROR %s not a valid port\n", argv[argc-1]);
 127                 return 1;
 128                 }
 129         if ((port2 = jack_port_by_name(client, argv[argc-2])) == 0) {
 130                 fprintf (stderr, "ERROR %s not a valid port\n", argv[argc-2]);
 131                 return 1;
 132                 }
 133
 134         port1_flags = jack_port_flags (port1);
 135         port2_flags = jack_port_flags (port2);
 136
 137         if (port1_flags & JackPortIsInput) {
 138                 if (port2_flags & JackPortIsOutput) {
 139                         src_port = port2;
 140                         dst_port = port1;
 141                 }
 142         } else {
 143                 if (port2_flags & JackPortIsInput) {
 144                         src_port = port1;
 145                         dst_port = port2;
 146                 }
 147         }
 148
 149         if (!src_port || !dst_port) {
 150                 fprintf (stderr, "arguments must include 1 input port and 1 output port\n");
 151                 return 1;
 152         }
 153
 154         /* connect the ports. Note: you can't do this before
 155            the client is activated (this may change in the future).
 156         */
 157
 158         if (connecting) {
 159                 if (jack_connect(client, jack_port_name(src_port), jack_port_name(dst_port))) {
 160                         fprintf (stderr, "cannot connect ports\n");
 161                         return 1;
 162         }
 163         }
 164         if (disconnecting) {
 165                 if (jack_disconnect(client, jack_port_name(src_port), jack_port_name(dst_port))) {
 166                         fprintf (stderr, "cannot disconnect ports\n");
 167                         return 1;
 168         }
 169         }
 170
 171         jack_client_close (client);
 172         exit (0);
 173 }
 174