daemon/virtualizer.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2009, 2010 Nedko Arnaudov <nedko@arnaudov.name>
   6  *
   7  **************************************************************************
   8  * This file contains implementation of the graph virtualizer object
   9  **************************************************************************
  10  *
  11  * LADI Session Handler is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * LADI Session Handler is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  23  * or write to the Free Software Foundation, Inc.,
  24  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "virtualizer.h"
  28 #include "../dbus_constants.h"
  29 #include "../proxies/a2j_proxy.h"
  30 #include "../proxies/jmcore_proxy.h"
  31 #include "procfs.h"
  32 #include "app_supervisor.h"
  33 #include "studio_internal.h"
  34 #include "../catdup.h"
  35 #include "room.h"
  36 #include "studio.h"
  37
  38 struct virtualizer
  39 {
  40   graph_proxy_handle jack_graph_proxy;
  41   ladish_graph_handle jack_graph;
  42   uint64_t system_client_id;
  43   unsigned int our_clients_count;
  44 };
  45
  46 /* 47c1cd18-7b21-4389-bec4-6e0658e1d6b1 */
  47 UUID_DEFINE(g_system_capture_uuid,0x47,0xC1,0xCD,0x18,0x7B,0x21,0x43,0x89,0xBE,0xC4,0x6E,0x06,0x58,0xE1,0xD6,0xB1);
  48
  49 /* b2a0bb06-28d8-4bfe-956e-eb24378f9629 */
  50 UUID_DEFINE(g_system_playback_uuid,0xB2,0xA0,0xBB,0x06,0x28,0xD8,0x4B,0xFE,0x95,0x6E,0xEB,0x24,0x37,0x8F,0x96,0x29);
  51
  52 /* be23a242-e2b2-11de-b795-002618af5e42 */
  53 UUID_DEFINE(g_a2j_uuid,0xBE,0x23,0xA2,0x42,0xE2,0xB2,0x11,0xDE,0xB7,0x95,0x00,0x26,0x18,0xAF,0x5E,0x42);
  54
  55 struct app_find_context
  56 {
  57   pid_t pid;
  58   char * app_name;
  59   ladish_graph_handle graph;
  60 };
  61
  62 #define app_find_context_ptr ((struct app_find_context *)context)
  63
  64 bool get_app_name_from_supervisor(void * context, ladish_graph_handle graph, ladish_app_supervisor_handle app_supervisor)
  65 {
  66   pid_t pid;
  67   char * app_name;
  68
  69   ASSERT(app_find_context_ptr->app_name == NULL); /* we stop iteration when app is found */
  70
  71   //log_info("checking app supervisor \"%s\" for pid %llu", ladish_app_supervisor_get_name(app_supervisor), (unsigned long long)pid);
  72
  73   pid = app_find_context_ptr->pid;
  74   do
  75   {
  76     app_name = ladish_app_supervisor_search_app(app_supervisor, pid);
  77     if (app_name != NULL)
  78       break;
  79
  80     pid = (pid_t)procfs_get_process_parent((unsigned long long)pid);
  81 #if 0
  82     if (pid != 0)
  83     {
  84       log_info("parent pid %llu", (unsigned long long)pid);
  85     }
  86 #endif
  87   }
  88   while (pid != 0);
  89
  90   if (app_name != NULL)
  91   {
  92     app_find_context_ptr->app_name = app_name;
  93     app_find_context_ptr->pid = pid;
  94     app_find_context_ptr->graph = graph;
  95     return false;               /* stop app supervisor iteration */
  96   }
  97
  98   return true;                  /* continue app supervisor iteration */
  99 }
 100
 101 #undef app_find_context_ptr
 102
 103 char * get_app_name(struct virtualizer * virtualizer_ptr, uint64_t client_id, pid_t pid, ladish_graph_handle * graph_ptr)
 104 {
 105   struct app_find_context context;
 106
 107   context.pid = (pid_t)pid;
 108   context.app_name = NULL;
 109   context.graph = NULL;
 110
 111   studio_iterate_virtual_graphs(&context, get_app_name_from_supervisor);
 112
 113   if (context.app_name != NULL)
 114   {
 115     ASSERT(context.graph != NULL);
 116     *graph_ptr = context.graph;
 117   }
 118
 119   return context.app_name;
 120 }
 121
 122 struct find_link_port_context
 123 {
 124   uuid_t uuid;
 125   uint64_t jack_id;
 126   ladish_port_handle port;
 127   ladish_graph_handle graph;
 128 };
 129
 130 #define find_link_port_context_ptr ((struct find_link_port_context *)context)
 131
 132 static bool find_link_port_vgraph_callback_by_uuid(void * context, ladish_graph_handle graph, ladish_app_supervisor_handle app_supervisor)
 133 {
 134   ladish_port_handle port;
 135
 136   port = ladish_graph_find_port_by_uuid(graph, find_link_port_context_ptr->uuid, true);
 137   if (port != NULL)
 138   {
 139     find_link_port_context_ptr->port = port;
 140     find_link_port_context_ptr->graph = graph;
 141     return false;
 142   }
 143
 144   return true;                  /* continue vgraph iteration */
 145 }
 146
 147 static bool find_link_port_vgraph_callback_by_jack_id(void * context, ladish_graph_handle graph, ladish_app_supervisor_handle app_supervisor)
 148 {
 149   ladish_port_handle port;
 150   bool room;
 151
 152   log_info("searching link port with jack id %"PRIu64" in graph %s", find_link_port_context_ptr->jack_id, ladish_graph_get_description(graph));
 153
 154   room = graph != g_studio.studio_graph;
 155
 156   port = ladish_graph_find_port_by_jack_id(graph, find_link_port_context_ptr->jack_id, room, !room);
 157   if (port != NULL)
 158   {
 159     find_link_port_context_ptr->port = port;
 160     find_link_port_context_ptr->graph = graph;
 161     return false;
 162   }
 163
 164   return true;                  /* continue vgraph iteration */
 165 }
 166
 167 #undef find_link_port_context_ptr
 168
 169 static ladish_graph_handle find_link_port_vgraph_by_uuid(struct virtualizer * virtualizer_ptr, const char * port_name, ladish_port_handle * port_ptr)
 170 {
 171   struct find_link_port_context context;
 172
 173   uuid_parse(port_name, context.uuid);
 174   context.graph = NULL;
 175   context.port = NULL;
 176
 177   studio_iterate_virtual_graphs(&context, find_link_port_vgraph_callback_by_uuid);
 178
 179   if (port_ptr != NULL && context.graph != NULL)
 180   {
 181     *port_ptr = context.port;
 182   }
 183
 184   return context.graph;
 185 }
 186
 187 static ladish_graph_handle find_link_port_vgraph_by_jack_id(struct virtualizer * virtualizer_ptr, uint64_t jack_id, ladish_port_handle * port_ptr)
 188 {
 189   struct find_link_port_context context;
 190
 191   context.jack_id = jack_id;
 192   context.graph = NULL;
 193   context.port = NULL;
 194
 195   studio_iterate_virtual_graphs(&context, find_link_port_vgraph_callback_by_jack_id);
 196
 197   if (port_ptr != NULL && context.graph != NULL)
 198   {
 199     *port_ptr = context.port;
 200   }
 201
 202   return context.graph;
 203 }
 204
 205 static
 206 bool
 207 lookup_port(
 208   struct virtualizer * virtualizer_ptr,
 209   uint64_t port_id,
 210   ladish_port_handle * port_ptr,
 211   ladish_graph_handle * vgraph_ptr)
 212 {
 213   ladish_port_handle port;
 214   ladish_client_handle jclient;
 215   ladish_graph_handle vgraph;
 216
 217   port = ladish_graph_find_port_by_jack_id(virtualizer_ptr->jack_graph, port_id, true, true);
 218   if (port == NULL)
 219   {
 220     log_error("Unknown JACK port with id %"PRIu64" (dis)connected", port_id);
 221     return false;
 222   }
 223
 224   jclient = ladish_graph_get_port_client(virtualizer_ptr->jack_graph, port);
 225   if (jclient == NULL)
 226   {
 227     log_error("Port %"PRIu64" without jack client was (dis)connected", port_id);
 228     return false;
 229   }
 230
 231   vgraph = ladish_client_get_vgraph(jclient);
 232   if (vgraph == NULL)
 233   {
 234     vgraph = find_link_port_vgraph_by_jack_id(virtualizer_ptr, port_id, NULL);
 235     if (vgraph == NULL)
 236     {
 237       log_error("Cannot find vgraph for (dis)connected jmcore port");
 238       return false;
 239     }
 240
 241     log_info("link port found in graph %s", ladish_graph_get_description(vgraph));
 242   }
 243
 244   *port_ptr = port;
 245   *vgraph_ptr = vgraph;
 246   return true;
 247 }
 248
 249 #define virtualizer_ptr ((struct virtualizer *)context)
 250
 251 static void clear(void * context)
 252 {
 253   log_info("clear");
 254 }
 255
 256 static void client_appeared(void * context, uint64_t id, const char * jack_name)
 257 {
 258   ladish_client_handle client;
 259   const char * a2j_name;
 260   bool is_a2j;
 261   char * app_name;
 262   const char * name;
 263   pid_t pid;
 264   ladish_graph_handle graph;
 265   bool jmcore;
 266
 267   log_info("client_appeared(%"PRIu64", %s)", id, jack_name);
 268
 269   a2j_name = a2j_proxy_get_jack_client_name_cached();
 270   is_a2j = a2j_name != NULL && strcmp(a2j_name, jack_name) == 0;
 271
 272   name = jack_name;
 273   app_name = NULL;
 274   jmcore = false;
 275
 276   if (!graph_proxy_get_client_pid(virtualizer_ptr->jack_graph_proxy, id, &pid))
 277   {
 278     log_info("client %"PRIu64" pid is unknown", id);
 279   }
 280   else
 281   {
 282     log_info("client pid is %"PRId64, (int64_t)pid);
 283
 284     if (pid != 0) /* skip internal clients that will match the pending clients in the graph, both have zero pid */
 285     {
 286       jmcore = pid == jmcore_proxy_get_pid_cached();
 287       if (jmcore)
 288       {
 289         log_info("jmcore client appeared");
 290       }
 291       else
 292       {
 293         app_name = get_app_name(virtualizer_ptr, id, pid, &graph);
 294         if (app_name != NULL)
 295         {
 296           log_info("app name is '%s'", app_name);
 297           name = app_name;
 298         }
 299       }
 300     }
 301   }
 302
 303   if (!jmcore)
 304   {
 305     if (is_a2j)
 306     {
 307       client = ladish_graph_find_client_by_uuid(virtualizer_ptr->jack_graph, g_a2j_uuid);
 308     }
 309     else
 310     {
 311       client = ladish_graph_find_client_by_name(virtualizer_ptr->jack_graph, name);
 312     }
 313
 314     if (client != NULL)
 315     {
 316       log_info("found existing client");
 317       if (ladish_client_get_jack_id(client) != 0)
 318       {
 319         log_error("Ignoring client with duplicate name '%s' ('%s')", name, jack_name);
 320         goto free_app_name;
 321       }
 322
 323       ladish_client_set_jack_id(client, id);
 324       ladish_graph_show_client(virtualizer_ptr->jack_graph, client);
 325       goto done;
 326     }
 327   }
 328
 329   if (!ladish_client_create(is_a2j ? g_a2j_uuid : NULL, &client))
 330   {
 331     log_error("ladish_client_create() failed. Ignoring client %"PRIu64" (%s)", id, jack_name);
 332     goto free_app_name;
 333   }
 334
 335   ladish_client_set_jack_id(client, id);
 336
 337   if (!ladish_graph_add_client(virtualizer_ptr->jack_graph, client, name, false))
 338   {
 339     log_error("ladish_graph_add_client() failed to add client %"PRIu64" (%s) to JACK graph", id, name);
 340     ladish_client_destroy(client);
 341     goto free_app_name;
 342   }
 343
 344 done:
 345   if (strcmp(jack_name, "system") == 0)
 346   {
 347     virtualizer_ptr->system_client_id = id;
 348   }
 349
 350   if (app_name != NULL)
 351   {
 352     ladish_client_set_pid(client, pid);
 353     ladish_client_set_vgraph(client, graph);
 354     virtualizer_ptr->our_clients_count++;
 355   }
 356   else if (jmcore)
 357   {
 358     ladish_client_set_pid(client, pid);
 359     ASSERT(ladish_client_get_vgraph(client) == NULL);
 360   }
 361   else
 362   {
 363     /* unknown and internal clients appear in the studio graph */
 364     ladish_client_set_vgraph(client, g_studio.studio_graph);
 365   }
 366
 367 free_app_name:
 368   if (app_name != NULL)
 369   {
 370     free(app_name);
 371   }
 372 }
 373
 374 static void client_disappeared(void * context, uint64_t id)
 375 {
 376   ladish_client_handle client;
 377   pid_t pid;
 378
 379   log_info("client_disappeared(%"PRIu64")", id);
 380
 381   client = ladish_graph_find_client_by_jack_id(virtualizer_ptr->jack_graph, id);
 382   if (client == NULL)
 383   {
 384     log_error("Unknown JACK client with id %"PRIu64" disappeared", id);
 385     return;
 386   }
 387
 388   log_info("client disappeared: '%s'", ladish_graph_get_client_name(virtualizer_ptr->jack_graph, client));
 389
 390   if (ladish_client_get_vgraph(client) == NULL)
 391   { /* remove jmcore clients, the are not persisted in the jack graph */
 392     ladish_graph_remove_client(virtualizer_ptr->jack_graph, client);
 393     ladish_client_destroy(client);
 394     return;
 395   }
 396
 397   pid = ladish_client_get_pid(client);
 398   if (pid != 0)
 399   {
 400     virtualizer_ptr->our_clients_count--;
 401   }
 402
 403   if (id == virtualizer_ptr->system_client_id)
 404   {
 405     virtualizer_ptr->system_client_id = 0;
 406   }
 407
 408   if (true)                     /* if client is supposed to be persisted */
 409   {
 410     ladish_client_set_jack_id(client, 0);
 411     ladish_graph_hide_client(virtualizer_ptr->jack_graph, client);
 412   }
 413   else
 414   {
 415     ladish_graph_remove_client(virtualizer_ptr->jack_graph, client);
 416     ladish_client_destroy(client);
 417   }
 418 }
 419
 420 static
 421 void
 422 port_appeared(
 423   void * context,
 424   uint64_t client_id,
 425   uint64_t port_id,
 426   const char * real_jack_port_name,
 427   bool is_input,
 428   bool is_terminal,
 429   bool is_midi)
 430 {
 431   ladish_client_handle jack_client;
 432   ladish_client_handle vclient;
 433   ladish_port_handle port;
 434   uint32_t type;
 435   uint32_t flags;
 436   const char * jack_client_name;
 437   bool is_a2j;
 438   uuid_t client_uuid;
 439   char * alsa_client_name;
 440   char * alsa_port_name;
 441   char * a2j_fake_jack_port_name = NULL;
 442   uint32_t alsa_client_id;
 443   const char * jack_port_name;
 444   const char * vport_name;
 445   ladish_graph_handle vgraph;
 446
 447   log_info("port_appeared(%"PRIu64", %"PRIu64", %s (%s, %s))", client_id, port_id, real_jack_port_name, is_input ? "in" : "out", is_midi ? "midi" : "audio");
 448
 449   type = is_midi ? JACKDBUS_PORT_TYPE_MIDI : JACKDBUS_PORT_TYPE_AUDIO;
 450   flags = is_input ? JACKDBUS_PORT_FLAG_INPUT : JACKDBUS_PORT_FLAG_OUTPUT;
 451   if (is_terminal)
 452   {
 453     flags |= JACKDBUS_PORT_FLAG_TERMINAL;
 454   }
 455
 456   /********************/
 457   /* gather info about the appeared port */
 458
 459   jack_client = ladish_graph_find_client_by_jack_id(virtualizer_ptr->jack_graph, client_id);
 460   if (jack_client == NULL)
 461   {
 462     log_error("Port of unknown JACK client with id %"PRIu64" appeared", client_id);
 463     goto exit;
 464   }
 465
 466   /* find the virtual graph that owns the app that owns the client that owns the appeared port */
 467   vgraph = ladish_client_get_vgraph(jack_client);
 468   if (vgraph == NULL)
 469   {
 470     vgraph = find_link_port_vgraph_by_uuid(virtualizer_ptr, real_jack_port_name, &port);
 471     if (vgraph == NULL)
 472     {
 473       log_error("Cannot find vgraph for appeared jmcore port '%s'", real_jack_port_name);
 474       goto exit;
 475     }
 476
 477     /* jmcore port appeared */
 478
 479     log_info("jmcore port appeared in vgraph %s", ladish_graph_get_description(vgraph));
 480
 481     if (!ladish_graph_add_port(virtualizer_ptr->jack_graph, jack_client, port, real_jack_port_name, type, flags, false))
 482     {
 483       log_error("ladish_graph_add_port() failed.");
 484       goto exit;
 485     }
 486
 487     if (vgraph == g_studio.studio_graph)
 488     {
 489       ladish_port_set_jack_id(port, port_id);
 490     }
 491     else
 492     {
 493       ladish_port_set_jack_id_room(port, port_id);
 494     }
 495
 496     vclient = ladish_graph_get_port_client(vgraph, port);
 497     if (vclient == NULL)
 498     {
 499       log_error("link port client not found in vgraph %s", ladish_graph_get_description(vgraph));
 500       ASSERT_NO_PASS;
 501       goto exit;
 502     }
 503
 504     ladish_graph_show_port(vgraph, port);
 505     goto exit;
 506   }
 507
 508   ladish_client_get_uuid(jack_client, client_uuid);
 509   is_a2j = uuid_compare(client_uuid, g_a2j_uuid) == 0;
 510   if (is_a2j)
 511   {
 512     log_info("a2j port appeared");
 513     if (!a2j_proxy_map_jack_port(real_jack_port_name, &alsa_client_name, &alsa_port_name, &alsa_client_id))
 514     {
 515       is_a2j = false;
 516     }
 517     else
 518     {
 519       log_info("a2j: '%s':'%s' (%"PRIu32")", alsa_client_name, alsa_port_name, alsa_client_id);
 520     }
 521
 522     a2j_fake_jack_port_name = catdup4(alsa_client_name, is_input ? " (playback)" : " (capture)", ": ", alsa_port_name);
 523     if (a2j_fake_jack_port_name == NULL)
 524     {
 525       log_error("catdup4() failed");
 526       goto free_alsa_names;
 527     }
 528
 529     jack_port_name = a2j_fake_jack_port_name;
 530   }
 531   else
 532   {
 533     jack_port_name = real_jack_port_name;
 534   }
 535
 536   jack_client_name = ladish_graph_get_client_name(virtualizer_ptr->jack_graph, jack_client);
 537
 538   /********************/
 539
 540   /* search (by name) the appeared port in jack graph
 541    * if found - show it in both graphs.
 542    * if not found - create new port and add it to the jack graph.
 543    * Then process to adding it to virtual graph */
 544
 545   port = ladish_graph_find_port_by_name(virtualizer_ptr->jack_graph, jack_client, jack_port_name);
 546   if (port != NULL)
 547   {
 548     log_info("found existing port");
 549
 550     if (ladish_port_get_jack_id(port) != 0)
 551     {
 552       log_error("Ignoring duplicate JACK port '%s':'%s'", jack_client_name, jack_port_name);
 553       goto free_alsa_names;
 554     }
 555
 556     ladish_port_set_jack_id(port, port_id);
 557     ladish_graph_adjust_port(virtualizer_ptr->jack_graph, port, type, flags);
 558     ladish_graph_show_port(virtualizer_ptr->jack_graph, port);
 559
 560     vclient = ladish_graph_get_port_client(vgraph, port);
 561     if (vclient == NULL)
 562     {
 563       log_error("JACK port not found in virtual graph");
 564       ASSERT_NO_PASS;
 565       goto free_alsa_names;
 566     }
 567
 568     ladish_client_set_jack_id(vclient, client_id);
 569     ladish_graph_adjust_port(vgraph, port, type, flags);
 570     ladish_graph_show_port(vgraph, port);
 571     goto free_alsa_names;
 572   }
 573
 574   if (!ladish_port_create(NULL, false, &port))
 575   {
 576     log_error("ladish_port_create() failed.");
 577     goto free_alsa_names;
 578   }
 579
 580   /* set port jack id so invisible connections to/from it can be restored */
 581   ladish_port_set_jack_id(port, port_id);
 582
 583   if (!ladish_graph_add_port(virtualizer_ptr->jack_graph, jack_client, port, jack_port_name, type, flags, false))
 584   {
 585     log_error("ladish_graph_add_port() failed.");
 586     ladish_port_destroy(port);
 587     goto free_alsa_names;
 588   }
 589
 590   /********************/
 591   /* find/create the virtual client where port will be added */
 592
 593   if (is_a2j)
 594   {
 595     vclient = ladish_graph_find_client_by_name(vgraph, alsa_client_name);
 596     if (vclient == NULL)
 597     {
 598         if (!ladish_client_create(NULL, &vclient))
 599         {
 600           log_error("ladish_client_create() failed.");
 601           goto free_alsa_names;
 602         }
 603
 604         if (!ladish_graph_add_client(vgraph, vclient, alsa_client_name, false))
 605         {
 606           log_error("ladish_graph_add_client() failed.");
 607           ladish_client_destroy(vclient);
 608           goto free_alsa_names;
 609         }
 610     }
 611
 612   }
 613   else if (client_id == virtualizer_ptr->system_client_id)
 614   {
 615     log_info("system client port appeared");
 616
 617     if (!is_input)
 618     { /* output capture port */
 619
 620       vclient = ladish_graph_find_client_by_uuid(vgraph, g_system_capture_uuid);
 621       if (vclient == NULL)
 622       {
 623         if (!ladish_client_create(g_system_capture_uuid, &vclient))
 624         {
 625           log_error("ladish_client_create() failed.");
 626           goto free_alsa_names;
 627         }
 628
 629         if (!ladish_graph_add_client(vgraph, vclient, "Hardware Capture", false))
 630         {
 631           log_error("ladish_graph_add_client() failed.");
 632           ladish_client_destroy(vclient);
 633           goto free_alsa_names;
 634         }
 635       }
 636     }
 637     else
 638     { /* input playback port */
 639       vclient = ladish_graph_find_client_by_uuid(vgraph, g_system_playback_uuid);
 640       if (vclient == NULL)
 641       {
 642         if (!ladish_client_create(g_system_playback_uuid, &vclient))
 643         {
 644           log_error("ladish_client_create() failed.");
 645           goto free_alsa_names;
 646         }
 647
 648         if (!ladish_graph_add_client(vgraph, vclient, "Hardware Playback", false))
 649         {
 650           ladish_client_destroy(vclient);
 651           goto free_alsa_names;
 652         }
 653       }
 654     }
 655   }
 656   else
 657   { /* non-system client */
 658     log_info("non-system client port appeared");
 659
 660     vclient = ladish_graph_find_client_by_jack_id(vgraph, client_id);
 661     if (vclient == NULL)
 662     {
 663       if (!ladish_client_create(NULL, &vclient))
 664       {
 665         log_error("ladish_client_create() failed.");
 666         goto free_alsa_names;
 667       }
 668
 669       ladish_client_set_jack_id(vclient, client_id);
 670
 671       if (!ladish_graph_add_client(vgraph, vclient, jack_client_name, false))
 672       {
 673         log_error("ladish_graph_add_client() failed to add client '%s' to virtual graph", jack_client_name);
 674         ladish_client_destroy(vclient);
 675         goto free_alsa_names;
 676       }
 677     }
 678   }
 679
 680   /********************/
 681   /* add newly appeared port to the virtual graph */
 682
 683   if (is_a2j)
 684   {
 685     vport_name = alsa_port_name;
 686   }
 687   else
 688   {
 689     vport_name = jack_port_name;
 690   }
 691
 692   if (!ladish_graph_add_port(vgraph, vclient, port, vport_name, type, flags, false))
 693   {
 694     log_error("ladish_graph_add_port() failed.");
 695     goto free_alsa_names;
 696   }
 697
 698 free_alsa_names:
 699   if (a2j_fake_jack_port_name != NULL)
 700   {
 701     free(a2j_fake_jack_port_name);
 702   }
 703
 704   if (is_a2j)
 705   {
 706     free(alsa_client_name);
 707     free(alsa_port_name);
 708   }
 709
 710 exit:
 711   return;
 712 }
 713
 714 static void port_disappeared(void * context, uint64_t client_id, uint64_t port_id)
 715 {
 716   ladish_client_handle client;
 717   ladish_port_handle port;
 718   ladish_graph_handle vgraph;
 719   bool jmcore;
 720
 721   log_info("port_disappeared(%"PRIu64", %"PRIu64")", client_id, port_id);
 722
 723   client = ladish_graph_find_client_by_jack_id(virtualizer_ptr->jack_graph, client_id);
 724   if (client == NULL)
 725   {
 726     log_error("Port of unknown JACK client with id %"PRIu64" disappeared", client_id);
 727     return;
 728   }
 729
 730   port = ladish_graph_find_port_by_jack_id(virtualizer_ptr->jack_graph, port_id, true, true);
 731   if (port == NULL)
 732   {
 733     log_error("Unknown JACK port with id %"PRIu64" disappeared", port_id);
 734     return;
 735   }
 736
 737   /* find the virtual graph that owns the app that owns the client that owns the disappeared port */
 738   jmcore = false;
 739   vgraph = ladish_client_get_vgraph(client);
 740   if (vgraph == NULL)
 741   {
 742     vgraph = find_link_port_vgraph_by_uuid(virtualizer_ptr, ladish_graph_get_port_name(virtualizer_ptr->jack_graph, port), NULL);
 743     if (vgraph == NULL)
 744     {
 745       log_error("Cannot find vgraph for disappeared jmcore port");
 746     }
 747     else
 748     {
 749       jmcore = true;
 750       ladish_graph_remove_port_by_jack_id(virtualizer_ptr->jack_graph, port_id, true, true);
 751     }
 752   }
 753
 754   if (true)                     /* if client is supposed to be persisted */
 755   {
 756     if (!jmcore)
 757     {
 758       ladish_port_set_jack_id(port, 0);
 759       ladish_graph_hide_port(virtualizer_ptr->jack_graph, port);
 760     }
 761     if (vgraph != NULL)
 762     {
 763       ladish_graph_hide_port(vgraph, port);
 764       client = ladish_graph_get_port_client(vgraph, port);
 765       if (ladish_graph_is_client_looks_empty(vgraph, client))
 766       {
 767         ladish_graph_hide_client(vgraph, client);
 768       }
 769     }
 770   }
 771   else
 772   {
 773     if (!jmcore)
 774     {
 775       ladish_graph_remove_port(virtualizer_ptr->jack_graph, port);
 776     }
 777
 778     if (vgraph != NULL)
 779     {
 780       client = ladish_graph_remove_port(vgraph, port);
 781       if (client != NULL)
 782       {
 783         if (ladish_graph_is_client_empty(vgraph, client))
 784         {
 785           ladish_graph_remove_client(vgraph, client);
 786         }
 787       }
 788     }
 789   }
 790 }
 791
 792 static void port_renamed(void * context, uint64_t client_id, uint64_t port_id, const char * old_port_name, const char * new_port_name)
 793 {
 794   ladish_client_handle client;
 795   ladish_port_handle port;
 796   ladish_graph_handle vgraph;
 797
 798   log_info("port_renamed(%"PRIu64", '%s', '%s')", port_id, old_port_name, new_port_name);
 799
 800   client = ladish_graph_find_client_by_jack_id(virtualizer_ptr->jack_graph, client_id);
 801   if (client == NULL)
 802   {
 803     log_error("Port of unknown JACK client with id %"PRIu64" was renamed", client_id);
 804     return;
 805   }
 806
 807   /* find the virtual graph that owns the app that owns the client that owns the renamed port */
 808   vgraph = ladish_client_get_vgraph(client);
 809
 810   port = ladish_graph_find_port_by_jack_id(virtualizer_ptr->jack_graph, port_id, true, true);
 811   if (port == NULL)
 812   {
 813     log_error("Unknown JACK port with id %"PRIu64" was renamed", port_id);
 814     return;
 815   }
 816
 817   if (!ladish_graph_rename_port(virtualizer_ptr->jack_graph, port, new_port_name))
 818   {
 819     log_error("renaming of port in jack graph failed");
 820   }
 821
 822   if (!ladish_graph_rename_port(vgraph, port, new_port_name))
 823   {
 824     log_error("renaming of port in virtual graph failed");
 825   }
 826 }
 827
 828 static bool ports_connect_request(void * context, ladish_graph_handle graph_handle, ladish_port_handle port1, ladish_port_handle port2)
 829 {
 830   uint64_t port1_id;
 831   uint64_t port2_id;
 832
 833   ASSERT(ladish_graph_get_opath(graph_handle)); /* studio or room virtual graph */
 834   log_info("virtualizer: ports connect request");
 835
 836   if (graph_handle == g_studio.studio_graph)
 837   {
 838     port1_id = ladish_port_get_jack_id(port1);
 839     port2_id = ladish_port_get_jack_id(port2);
 840   }
 841   else
 842   {
 843     port1_id = ladish_port_get_jack_id_room(port1);
 844     port2_id = ladish_port_get_jack_id_room(port2);
 845   }
 846
 847   graph_proxy_connect_ports(virtualizer_ptr->jack_graph_proxy, port1_id, port2_id);
 848
 849   return true;
 850 }
 851
 852 static bool ports_disconnect_request(void * context, ladish_graph_handle graph_handle, uint64_t connection_id)
 853 {
 854   ladish_port_handle port1;
 855   ladish_port_handle port2;
 856   uint64_t port1_id;
 857   uint64_t port2_id;
 858
 859   ASSERT(ladish_graph_get_opath(graph_handle)); /* studio or room virtual graph */
 860   log_info("virtualizer: ports disconnect request");
 861
 862   if (!ladish_graph_get_connection_ports(graph_handle, connection_id, &port1, &port2))
 863   {
 864     log_error("cannot find ports that are disconnect-requested");
 865     ASSERT_NO_PASS;
 866     return false;
 867   }
 868
 869   if (graph_handle == g_studio.studio_graph)
 870   {
 871     port1_id = ladish_port_get_jack_id(port1);
 872     port2_id = ladish_port_get_jack_id(port2);
 873   }
 874   else
 875   {
 876     port1_id = ladish_port_get_jack_id_room(port1);
 877     port2_id = ladish_port_get_jack_id_room(port2);
 878   }
 879
 880   graph_proxy_disconnect_ports(virtualizer_ptr->jack_graph_proxy, port1_id, port2_id);
 881
 882   return true;
 883 }
 884
 885 static void ports_connected(void * context, uint64_t client1_id, uint64_t port1_id, uint64_t client2_id, uint64_t port2_id)
 886 {
 887   ladish_port_handle port1;
 888   ladish_port_handle port2;
 889   uint64_t connection_id;
 890   ladish_graph_handle vgraph1;
 891   ladish_graph_handle vgraph2;
 892
 893   log_info("ports_connected %"PRIu64":%"PRIu64" %"PRIu64":%"PRIu64"", client1_id, port1_id, client2_id, port2_id);
 894
 895   if (!lookup_port(virtualizer_ptr, port1_id, &port1, &vgraph1))
 896   {
 897     return;
 898   }
 899
 900   if (!lookup_port(virtualizer_ptr, port2_id, &port2, &vgraph2))
 901   {
 902     return;
 903   }
 904
 905   if (vgraph1 != vgraph2)
 906   {
 907     /* TODO */
 908     log_error("ignoring connection with endpoints in different vgraphs");
 909     return;
 910   }
 911
 912   ladish_graph_add_connection(virtualizer_ptr->jack_graph, port1, port2, false);
 913
 914   if (ladish_graph_find_connection(vgraph1, port1, port2, &connection_id))
 915   {
 916     log_info("showing hidden virtual connection");
 917     ladish_graph_show_connection(vgraph1, connection_id);
 918   }
 919   else
 920   {
 921     log_info("creating new virtual connection");
 922     ladish_graph_add_connection(vgraph1, port1, port2, false);
 923   }
 924 }
 925
 926 static void ports_disconnected(void * context, uint64_t client1_id, uint64_t port1_id, uint64_t client2_id, uint64_t port2_id)
 927 {
 928   ladish_port_handle port1;
 929   ladish_port_handle port2;
 930   uint64_t connection_id;
 931   ladish_graph_handle vgraph1;
 932   ladish_graph_handle vgraph2;
 933
 934   log_info("ports_disconnected %"PRIu64":%"PRIu64" %"PRIu64":%"PRIu64"", client1_id, port1_id, client2_id, port2_id);
 935
 936   if (!lookup_port(virtualizer_ptr, port1_id, &port1, &vgraph1))
 937   {
 938     return;
 939   }
 940
 941   if (!lookup_port(virtualizer_ptr, port2_id, &port2, &vgraph2))
 942   {
 943     return;
 944   }
 945
 946   if (vgraph1 != vgraph2)
 947   {
 948     /* TODO */
 949     log_error("ignoring connection with endpoints in different vgraphs");
 950     return;
 951   }
 952
 953   if (ladish_graph_find_connection(virtualizer_ptr->jack_graph, port1, port2, &connection_id))
 954   {
 955     ladish_graph_remove_connection(virtualizer_ptr->jack_graph, connection_id, true);
 956   }
 957   else
 958   {
 959     log_error("ports %"PRIu64":%"PRIu64" and %"PRIu64":%"PRIu64" are not connected in the JACK graph", client1_id, port1_id, client2_id, port2_id);
 960   }
 961
 962   if (ladish_graph_find_connection(vgraph1, port1, port2, &connection_id))
 963   {
 964     ladish_graph_remove_connection(vgraph1, connection_id, false);
 965   }
 966   else
 967   {
 968     log_error("ports %"PRIu64":%"PRIu64" and %"PRIu64":%"PRIu64" are not connected in the virtual graph", client1_id, port1_id, client2_id, port2_id);
 969   }
 970 }
 971
 972 #undef virtualizer_ptr
 973
 974 bool
 975 ladish_virtualizer_create(
 976   graph_proxy_handle jack_graph_proxy,
 977   ladish_graph_handle jack_graph,
 978   ladish_virtualizer_handle * handle_ptr)
 979 {
 980   struct virtualizer * virtualizer_ptr;
 981
 982   virtualizer_ptr = malloc(sizeof(struct virtualizer));
 983   if (virtualizer_ptr == NULL)
 984   {
 985     log_error("malloc() failed for struct virtualizer");
 986     return false;
 987   }
 988
 989   virtualizer_ptr->jack_graph_proxy = jack_graph_proxy;
 990   virtualizer_ptr->jack_graph = jack_graph;
 991   virtualizer_ptr->system_client_id = 0;
 992   virtualizer_ptr->our_clients_count = 0;
 993
 994   if (!graph_proxy_attach(
 995         jack_graph_proxy,
 996         virtualizer_ptr,
 997         clear,
 998         client_appeared,
 999         NULL,                   /* jackdbus does not have client rename functionality (yet) */
1000         client_disappeared,
1001         port_appeared,
1002         port_renamed,
1003         port_disappeared,
1004         ports_connected,
1005         ports_disconnected))
1006   {
1007     free(virtualizer_ptr);
1008     return false;
1009   }
1010
1011   *handle_ptr = (ladish_virtualizer_handle)virtualizer_ptr;
1012   return true;
1013 }
1014
1015 #define virtualizer_ptr ((struct virtualizer *)handle)
1016
1017 void
1018 ladish_virtualizer_set_graph_connection_handlers(
1019   ladish_virtualizer_handle handle,
1020   ladish_graph_handle graph)
1021 {
1022   ladish_graph_set_connection_handlers(graph, virtualizer_ptr, ports_connect_request, ports_disconnect_request);
1023 }
1024
1025 unsigned int
1026 ladish_virtualizer_get_our_clients_count(
1027   ladish_virtualizer_handle handle)
1028 {
1029   return virtualizer_ptr->our_clients_count;
1030 }
1031
1032 void
1033 ladish_virtualizer_destroy(
1034   ladish_virtualizer_handle handle)
1035 {
1036   log_info("ladish_virtualizer_destroy() called");
1037
1038   graph_proxy_detach((graph_proxy_handle)handle, virtualizer_ptr);
1039   free(virtualizer_ptr);
1040 }
1041
1042 #undef virtualizer_ptr