example-clients/lsp.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #ifndef WIN32
   4 #include <unistd.h>
   5 #endif
   6 #include <string.h>
   7 #include <getopt.h>
   8
   9 #include "jack.h"
  10
  11 char * my_name;
  12
  13 void
  14 show_version (void)
  15 {
  16         //fprintf (stderr, "%s: JACK Audio Connection Kit version " VERSION "\n",
  17         //my_name);
  18 }
  19
  20 void
  21 show_usage (void)
  22 {
  23         show_version ();
  24         fprintf (stderr, "\nUsage: %s [options]\n", my_name);
  25         fprintf (stderr, "List active Jack ports, and optionally display extra information.\n\n");
  26         fprintf (stderr, "Display options:\n");
  27         fprintf (stderr, "        -c, --connections     List connections to/from each port\n");
  28         fprintf (stderr, "        -l, --latency         Display per-port latency in frames at each port\n");
  29         fprintf (stderr, "        -L, --latency         Display total latency in frames at each port\n");
  30         fprintf (stderr, "        -p, --properties      Display port properties. Output may include:\n"
  31                          "                              input|output, can-monitor, physical, terminal\n\n");
  32         fprintf (stderr, "        -t, --type            Display port type\n");
  33         fprintf (stderr, "        -h, --help            Display this help message\n");
  34         fprintf (stderr, "        --version             Output version information and exit\n\n");
  35         fprintf (stderr, "For more information see http://jackit.sourceforge.net/\n");
  36 }
  37
  38 int
  39 main (int argc, char *argv[])
  40 {
  41         jack_client_t *client;
  42         jack_status_t status;
  43         const char **ports, **connections;
  44         unsigned int i, j;
  45         int show_con = 0;
  46         int show_port_latency = 0;
  47         int show_total_latency = 0;
  48         int show_properties = 0;
  49         int show_type = 0;
  50         int c;
  51         int option_index;
  52         jack_port_t *port;
  53
  54         struct option long_options[] = {
  55                 { "connections", 0, 0, 'c' },
  56                 { "port-latency", 0, 0, 'l' },
  57                 { "total-latency", 0, 0, 'L' },
  58                 { "properties", 0, 0, 'p' },
  59                 { "type", 0, 0, 't' },
  60                 { "help", 0, 0, 'h' },
  61                 { "version", 0, 0, 'v' },
  62                 { 0, 0, 0, 0 }
  63         };
  64
  65         my_name = strrchr(argv[0], '/');
  66         if (my_name == 0) {
  67                 my_name = argv[0];
  68         } else {
  69                 my_name ++;
  70         }
  71
  72         while ((c = getopt_long (argc, argv, "clLphvt", long_options, &option_index)) >= 0) {
  73                 switch (c) {
  74                 case 'c':
  75                         show_con = 1;
  76                         break;
  77                 case 'l':
  78                         show_port_latency = 1;
  79                         break;
  80                 case 'L':
  81                         show_total_latency = 1;
  82                         break;
  83                 case 'p':
  84                         show_properties = 1;
  85                         break;
  86                 case 't':
  87                         show_type = 1;
  88                         break;
  89                 case 'h':
  90                         show_usage ();
  91                         return 1;
  92                         break;
  93                 case 'v':
  94                         show_version ();
  95                         return 1;
  96                         break;
  97                 default:
  98                         show_usage ();
  99                         return 1;
 100                         break;
 101                 }
 102         }
 103
 104         /* Open a client connection to the JACK server.  Starting a
 105          * new server only to list its ports seems pointless, so we
 106          * specify JackNoStartServer. */
 107         //JOQ: need a new server name option
 108
 109         client = jack_client_open ("lsp", JackNoStartServer, &status);
 110         if (client == NULL) {
 111                 if (status & JackServerFailed) {
 112                         fprintf (stderr, "JACK server not running\n");
 113                 } else {
 114                         fprintf (stderr, "jack_client_open() failed, "
 115                                  "status = 0x%2.0x\n", status);
 116                 }
 117                 return 1;
 118         }
 119
 120         ports = jack_get_ports (client, NULL, NULL, 0);
 121
 122         for (i = 0; ports[i]; ++i) {
 123                 printf ("%s\n", ports[i]);
 124
 125                 port = jack_port_by_name (client, ports[i]);
 126
 127                 if (show_con) {
 128                         if ((connections = jack_port_get_all_connections (client, jack_port_by_name(client, ports[i]))) != 0) {
 129                                 for (j = 0; connections[j]; j++) {
 130                                         printf ("   %s\n", connections[j]);
 131                                 }
 132                                 free (connections);
 133                         }
 134                 }
 135                 if (show_port_latency) {
 136                         if (port) {
 137                                 printf ("       port latency = %ld frames\n",
 138                                         jack_port_get_latency (port));
 139                         }
 140                 }
 141                 if (show_total_latency) {
 142                         if (port) {
 143                                 printf ("       total latency =  %ld frames\n",
 144                                         jack_port_get_total_latency (client, port));
 145                         }
 146                 }
 147                 if (show_properties) {
 148                         if (port) {
 149                                 int flags = jack_port_flags (port);
 150                                 printf ("       properties: ");
 151                                 if (flags & JackPortIsInput) {
 152                                         fputs ("input,", stdout);
 153                                 }
 154                                 if (flags & JackPortIsOutput) {
 155                                         fputs ("output,", stdout);
 156                                 }
 157                                 if (flags & JackPortCanMonitor) {
 158                                         fputs ("can-monitor,", stdout);
 159                                 }
 160                                 if (flags & JackPortIsPhysical) {
 161                                         fputs ("physical,", stdout);
 162                                 }
 163                                 if (flags & JackPortIsTerminal) {
 164                                         fputs ("terminal,", stdout);
 165                                 }
 166                                 putc ('\n', stdout);
 167                         }
 168                 }
 169                 if (show_type) {
 170                         if (port) {
 171                                 putc ('\t', stdout);
 172                                 fputs (jack_port_type (port), stdout);
 173                                 putc ('\n', stdout);
 174                         }
 175                 }
 176         }
 177         jack_client_close (client);
 178         exit (0);
 179 }