example-clients/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 #include <stdio.h>
  20 #include <errno.h>
  21 #ifndef WIN32
  22 #include <unistd.h>
  23 #endif
  24 #include <string.h>
  25 #include <stdlib.h>
  26 #include <math.h>
  27 #include <jack/jack.h>
  28
  29 jack_port_t *input_port;
  30 jack_port_t *output_port;
  31 int connecting, disconnecting;
  32 #define TRUE 1
  33 #define FALSE 0
  34
  35 int
  36 main (int argc, char *argv[])
  37 {
  38         jack_client_t* client = NULL;
  39         char *my_name = strrchr(argv[0], '/');
  40         connecting = disconnecting = FALSE;
  41         if (my_name == 0) {
  42                 my_name = argv[0];
  43         } else {
  44                 my_name ++;
  45         }
  46
  47     printf("name %s\n", my_name);
  48
  49         if (strstr(my_name, "jack_disconnect")) {
  50                 disconnecting = TRUE;
  51         } else
  52         if (strstr(my_name, "jack_connect")) {
  53                 connecting = TRUE;
  54         } else {
  55                 fprintf(stderr, "ERROR! client should be called jack_connect or jack_disconnect. client is called %s\n", my_name);
  56                 return 1;
  57         }
  58
  59         if (argc != 3) {
  60                 fprintf (stderr, "usage: %s <src_port> <dst_port>\n", my_name);
  61                 fprintf(stderr, "The source port must be an output port of the source client.\n");
  62                 fprintf (stderr, "The destination port must be an input port of the destination client.\n");
  63                 return 1;
  64         }
  65
  66         /* try to become a client of the JACK server */
  67
  68         if ((client = jack_client_open (my_name, JackNullOption, NULL)) == 0) {
  69                 fprintf (stderr, "jack server not running?\n");
  70                 return 1;
  71         }
  72
  73         /* display the current sample rate. once the client is activated
  74            (see below), you should rely on your own sample rate
  75            callback (see above) for this value.
  76         */
  77
  78         /* find the two ports */
  79
  80         if ((input_port = jack_port_by_name(client, argv[1])) == 0) {
  81                 fprintf (stderr, "ERROR %s not a valid port\n", argv[1]);
  82                 goto error;
  83         }
  84         if ((output_port = jack_port_by_name(client, argv[2])) == 0) {
  85                 fprintf (stderr, "ERROR %s not a valid port\n", argv[2]);
  86                 goto error;
  87         }
  88
  89         /* tell the JACK server that we are ready to roll */
  90
  91         if (jack_activate (client)) {
  92                 fprintf (stderr, "cannot activate client");
  93                 goto error;
  94         }
  95
  96         /* connect the ports. Note: you can't do this before
  97            the client is activated (this may change in the future).
  98         */
  99
 100         if (connecting) {
 101                 if (jack_connect(client, jack_port_name(input_port), jack_port_name(output_port))) {
 102                         fprintf (stderr, "cannot connect ports\n");
 103                         goto error;
 104         }
 105         }
 106         if (disconnecting) {
 107         if (jack_disconnect(client, jack_port_name(input_port), jack_port_name(output_port))) {
 108                         fprintf (stderr, "cannot disconnect ports\n");
 109             goto error;
 110         }
 111         }
 112     jack_deactivate (client);
 113         jack_client_close (client);
 114         return 0;
 115
 116 error:
 117     if (client)
 118                 jack_client_close (client);
 119     return 1;
 120 }
 121