example-clients/session_notify.c

   1 /*
   2  *  session_notify.c -- ultra minimal session manager
   3  *
   4  *  Copyright (C) 2018 Karl Linden <karl.j.linden@gmail.com>
   5  *  Copyright (C) 2010 Torben Hohn.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <alloca.h>
  23 #include <stdio.h>
  24 #include <errno.h>
  25 #include <unistd.h>
  26 #include <signal.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <jack/jack.h>
  30 #include <jack/jslist.h>
  31 #include <jack/transport.h>
  32 #include <jack/session.h>
  33
  34 char *package;                          /* program name */
  35 jack_client_t *client;
  36
  37 jack_session_event_type_t notify_type;
  38 char *save_path = NULL;
  39
  40 void jack_shutdown(void *arg)
  41 {
  42         fprintf(stderr, "JACK shut down, exiting ...\n");
  43         exit(1);
  44 }
  45
  46 void signal_handler(int sig)
  47 {
  48         jack_client_close(client);
  49         fprintf(stderr, "signal received, exiting ...\n");
  50         exit(0);
  51 }
  52
  53 void parse_arguments(int argc, char *argv[])
  54 {
  55
  56         /* basename $0 */
  57         package = strrchr(argv[0], '/');
  58         if (package == 0)
  59                 package = argv[0];
  60         else
  61                 package++;
  62
  63         if (argc==2) {
  64                 if( !strcmp( argv[1], "quit" ) ) {
  65                         notify_type = JackSessionSaveAndQuit;
  66                         return;
  67                 }
  68         }
  69         if (argc==3) {
  70                 if( !strcmp( argv[1], "save" ) ) {
  71                         notify_type = JackSessionSave;
  72                         save_path = argv[2];
  73                         return;
  74                 }
  75
  76         }
  77         fprintf(stderr, "usage: %s quit|save [path]\n", package);
  78         exit(9);
  79 }
  80
  81 typedef struct {
  82         char name[32];
  83         char uuid[16];
  84 } uuid_map_t;
  85
  86 JSList *uuid_map = NULL;
  87
  88 void add_uuid_mapping( const char *uuid ) {
  89         char *clientname = jack_get_client_name_by_uuid( client, uuid );
  90         if( !clientname ) {
  91                 printf( "error... can not find client for uuid" );
  92                 return;
  93         }
  94
  95         uuid_map_t *mapping = malloc( sizeof(uuid_map_t) );
  96         snprintf( mapping->uuid, sizeof(mapping->uuid), "%s", uuid );
  97         snprintf( mapping->name, sizeof(mapping->name), "%s", clientname );
  98         uuid_map = jack_slist_append( uuid_map, mapping );
  99 }
 100
 101 char *map_port_name_to_uuid_port( const char *port_name )
 102 {
 103         JSList *node;
 104         char retval[300];
 105         char *port_component = strchr( port_name,':' );
 106         char *client_component = strdup( port_name );
 107         strchr( client_component, ':' )[0] = '\0';
 108
 109         sprintf( retval, "%s", port_name );
 110
 111         for( node=uuid_map; node; node=jack_slist_next(node) ) {
 112                 uuid_map_t *mapping = node->data;
 113                 if( !strcmp( mapping->name, client_component ) ) {
 114                         sprintf( retval, "%s%s", mapping->uuid, port_component );
 115                         break;
 116                 }
 117         }
 118
 119         return strdup(retval);
 120 }
 121
 122 int main(int argc, char *argv[])
 123 {
 124         parse_arguments(argc, argv);
 125         jack_session_command_t *retval;
 126         int k,i,j;
 127
 128
 129         /* become a JACK client */
 130         if ((client = jack_client_open(package, JackNullOption, NULL)) == 0) {
 131                 fprintf(stderr, "JACK server not running?\n");
 132                 exit(1);
 133         }
 134
 135 #ifndef WIN32
 136         signal(SIGQUIT, signal_handler);
 137         signal(SIGHUP, signal_handler);
 138 #endif
 139
 140         signal(SIGTERM, signal_handler);
 141         signal(SIGINT, signal_handler);
 142
 143         jack_on_shutdown(client, jack_shutdown, 0);
 144
 145         jack_activate(client);
 146
 147
 148         retval = jack_session_notify( client, NULL, notify_type, save_path );
 149         for (i = 0; retval[i].uuid; i++) {
 150                 printf( "export SESSION_DIR=\"%s%s/\"\n", save_path, retval[i].client_name );
 151                 printf( "%s &\n", retval[i].command );
 152                 add_uuid_mapping(retval[i].uuid);
 153         }
 154
 155         printf( "sleep 10\n" );
 156
 157         for (k = 0; retval[k].uuid; k++) {
 158
 159                 char* port_regexp = alloca( jack_client_name_size()+3 );
 160                 char* client_name = jack_get_client_name_by_uuid( client, retval[k].uuid );
 161                 snprintf( port_regexp, jack_client_name_size()+3, "%s:.*", client_name );
 162                 jack_free(client_name);
 163                 const char **ports = jack_get_ports( client, port_regexp, NULL, 0 );
 164                 if( !ports ) {
 165                         continue;
 166                 }
 167                 for (i = 0; ports[i]; ++i) {
 168                         const char **connections;
 169                         if ((connections = jack_port_get_all_connections (client, jack_port_by_name(client, ports[i]))) != 0) {
 170                                 for (j = 0; connections[j]; j++) {
 171                                         char *src = map_port_name_to_uuid_port( ports[i] );
 172                                         char *dst = map_port_name_to_uuid_port( connections[j] );
 173                                         printf( "jack_connect -u \"%s\" \"%s\"\n", src, dst );
 174                                 }
 175                                 jack_free (connections);
 176                         }
 177                 }
 178                 jack_free(ports);
 179
 180         }
 181         jack_session_commands_free(retval);
 182
 183         jack_client_close(client);
 184
 185         return 0;
 186 }