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         int rc = 1;
  69
  70         struct option long_options[] = {
  71             { "server", 1, 0, 's' },
  72             { "help", 0, 0, 'h' },
  73             { "version", 0, 0, 'v' },
  74             { 0, 0, 0, 0 }
  75         };
  76
  77         while ((c = getopt_long (argc, argv, "s:hv", long_options, &option_index)) >= 0) {
  78                 switch (c) {
  79                 case 's':
  80                         server_name = (char *) malloc (sizeof (char) * strlen(optarg));
  81                         strcpy (server_name, optarg);
  82                         options |= JackServerName;
  83                         break;
  84                 case 'h':
  85                         show_usage (my_name);
  86                         return 1;
  87                         break;
  88                 case 'v':
  89                         show_version (my_name);
  90                         return 1;
  91                         break;
  92                 default:
  93                         show_usage (my_name);
  94                         return 1;
  95                         break;
  96                 }
  97         }
  98
  99         connecting = disconnecting = FALSE;
 100         if (my_name == 0) {
 101                 my_name = argv[0];
 102         } else {
 103                 my_name ++;
 104         }
 105
 106         if (strstr(my_name, "disconnect")) {
 107                 disconnecting = 1;
 108         } else if (strstr(my_name, "connect")) {
 109                 connecting = 1;
 110         } else {
 111                 fprintf(stderr, "ERROR! client should be called jack_connect or jack_disconnect. client is called %s\n", my_name);
 112                 return 1;
 113         }
 114
 115         if (argc < 3) show_usage(my_name);
 116
 117         /* try to become a client of the JACK server */
 118
 119         if ((client = jack_client_open (my_name, options, &status, server_name)) == 0) {
 120                 fprintf (stderr, "jack server not running?\n");
 121                 return 1;
 122         }
 123
 124         /* find the two ports */
 125
 126         if ((port1 = jack_port_by_name(client, argv[argc-1])) == 0) {
 127                 fprintf (stderr, "ERROR %s not a valid port\n", argv[argc-1]);
 128                 goto exit;
 129                 }
 130         if ((port2 = jack_port_by_name(client, argv[argc-2])) == 0) {
 131                 fprintf (stderr, "ERROR %s not a valid port\n", argv[argc-2]);
 132                 goto exit;
 133                 }
 134
 135         port1_flags = jack_port_flags (port1);
 136         port2_flags = jack_port_flags (port2);
 137
 138         if (port1_flags & JackPortIsInput) {
 139                 if (port2_flags & JackPortIsOutput) {
 140                         src_port = port2;
 141                         dst_port = port1;
 142                 }
 143         } else {
 144                 if (port2_flags & JackPortIsInput) {
 145                         src_port = port1;
 146                         dst_port = port2;
 147                 }
 148         }
 149
 150         if (!src_port || !dst_port) {
 151                 fprintf (stderr, "arguments must include 1 input port and 1 output port\n");
 152                 goto exit;
 153         }
 154
 155         /* connect the ports. Note: you can't do this before
 156            the client is activated (this may change in the future).
 157         */
 158
 159         if (connecting) {
 160                 if (jack_connect(client, jack_port_name(src_port), jack_port_name(dst_port))) {
 161                         goto exit;
 162                 }
 163         }
 164         if (disconnecting) {
 165                 if (jack_disconnect(client, jack_port_name(src_port), jack_port_name(dst_port))) {
 166                         goto exit;
 167                 }
 168         }
 169
 170         /* everything was ok, so setting exitcode to 0 */
 171         rc = 0;
 172
 173 exit:
 174         jack_client_close (client);
 175         exit (rc);
 176 }
 177