git.sesse.net Git - vlc/blob - src/playlist/services_discovery.c

   1 /*****************************************************************************
   2  * services_discovery.c : Manage playlist services_discovery modules
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 # include "config.h"
  25 #endif
  26 #include <assert.h>
  27
  28 #include <vlc_common.h>
  29 #include "vlc_playlist.h"
  30 #include "vlc_events.h"
  31 #include "playlist_internal.h"
  32 #include "../libvlc.h"
  33
  34 static void RunSD( services_discovery_t *p_sd );
  35
  36 /*
  37  * Services discovery
  38  * Basically you just listen to Service discovery event through the
  39  * sd's event manager.
  40  * That's how the playlist get's Service Discovery information
  41  */
  42
  43 /***********************************************************************
  44  * GetServicesNames
  45  ***********************************************************************/
  46 char ** __services_discovery_GetServicesNames( vlc_object_t * p_super,
  47                                                char ***pppsz_longnames )
  48 {
  49     return module_GetModulesNamesForCapability( p_super, "services_discovery",
  50                                                 pppsz_longnames );
  51 }
  52
  53 /***********************************************************************
  54  * Create
  55  ***********************************************************************/
  56 services_discovery_t *
  57 services_discovery_Create ( vlc_object_t * p_super, const char * psz_module_name )
  58 {
  59     services_discovery_t *p_sd;
  60     p_sd = vlc_custom_create( p_super, sizeof( *p_sd ), VLC_OBJECT_GENERIC,
  61                               "services discovery" );
  62     if( !p_sd )
  63         return NULL;
  64
  65     p_sd->pf_run = NULL;
  66     p_sd->psz_localized_name = NULL;
  67
  68     vlc_event_manager_init( &p_sd->event_manager, p_sd, (vlc_object_t *)p_sd );
  69     vlc_event_manager_register_event_type( &p_sd->event_manager,
  70             vlc_ServicesDiscoveryItemAdded );
  71     vlc_event_manager_register_event_type( &p_sd->event_manager,
  72             vlc_ServicesDiscoveryItemRemoved );
  73     vlc_event_manager_register_event_type( &p_sd->event_manager,
  74             vlc_ServicesDiscoveryStarted );
  75     vlc_event_manager_register_event_type( &p_sd->event_manager,
  76             vlc_ServicesDiscoveryEnded );
  77
  78     p_sd->p_module = module_Need( p_sd, "services_discovery", psz_module_name, true );
  79
  80     if( p_sd->p_module == NULL )
  81     {
  82         msg_Err( p_super, "no suitable services discovery module" );
  83         vlc_object_release( p_sd );
  84         return NULL;
  85     }
  86     p_sd->psz_module = strdup( psz_module_name );
  87     p_sd->b_die = false; /* FIXME */
  88
  89     vlc_object_attach( p_sd, p_super );
  90     return p_sd;
  91 }
  92
  93 /***********************************************************************
  94  * Destroy
  95  ***********************************************************************/
  96 void services_discovery_Destroy ( services_discovery_t * p_sd )
  97 {
  98     vlc_event_manager_fini( &p_sd->event_manager );
  99
 100     free( p_sd->psz_module );
 101     free( p_sd->psz_localized_name );
 102
 103     vlc_object_detach( p_sd );
 104     vlc_object_release( p_sd );
 105 }
 106
 107 /***********************************************************************
 108  * Start
 109  ***********************************************************************/
 110 int services_discovery_Start ( services_discovery_t * p_sd )
 111 {
 112     if ((p_sd->pf_run != NULL)
 113         && vlc_thread_create( p_sd, "services_discovery", RunSD,
 114                               VLC_THREAD_PRIORITY_LOW, false))
 115     {
 116         msg_Err( p_sd, "cannot create services discovery thread" );
 117         vlc_object_release( p_sd );
 118         return VLC_EGENERIC;
 119     }
 120     return VLC_SUCCESS;
 121 }
 122
 123 /***********************************************************************
 124  * Stop
 125  ***********************************************************************/
 126 void services_discovery_Stop ( services_discovery_t * p_sd )
 127 {
 128     vlc_object_kill( p_sd );
 129     if( p_sd->pf_run ) vlc_thread_join( p_sd );
 130
 131     module_Unneed( p_sd, p_sd->p_module );
 132 }
 133
 134 /***********************************************************************
 135  * GetLocalizedName
 136  ***********************************************************************/
 137 char *
 138 services_discovery_GetLocalizedName ( services_discovery_t * p_sd )
 139 {
 140     return p_sd->psz_localized_name ? strdup( p_sd->psz_localized_name ) : NULL;
 141 }
 142
 143 /***********************************************************************
 144  * SetLocalizedName
 145  ***********************************************************************/
 146 void
 147 services_discovery_SetLocalizedName ( services_discovery_t * p_sd, const char *psz )
 148 {
 149     free( p_sd->psz_localized_name );
 150     p_sd->psz_localized_name = strdup(psz);
 151 }
 152
 153 /***********************************************************************
 154  * EventManager
 155  ***********************************************************************/
 156 vlc_event_manager_t *
 157 services_discovery_EventManager ( services_discovery_t * p_sd )
 158 {
 159     return &p_sd->event_manager;
 160 }
 161
 162 /***********************************************************************
 163  * AddItem
 164  ***********************************************************************/
 165 void
 166 services_discovery_AddItem ( services_discovery_t * p_sd, input_item_t * p_item,
 167                              const char * psz_category )
 168 {
 169     vlc_event_t event;
 170     event.type = vlc_ServicesDiscoveryItemAdded;
 171     event.u.services_discovery_item_added.p_new_item = p_item;
 172     event.u.services_discovery_item_added.psz_category = psz_category;
 173
 174     vlc_event_send( &p_sd->event_manager, &event );
 175 }
 176
 177 /***********************************************************************
 178  * RemoveItem
 179  ***********************************************************************/
 180 void
 181 services_discovery_RemoveItem ( services_discovery_t * p_sd, input_item_t * p_item )
 182 {
 183     vlc_event_t event;
 184     event.type = vlc_ServicesDiscoveryItemRemoved;
 185     event.u.services_discovery_item_removed.p_item = p_item;
 186
 187     vlc_event_send( &p_sd->event_manager, &event );
 188 }
 189
 190 /***********************************************************************
 191  * RunSD (Private)
 192  ***********************************************************************/
 193 static void RunSD( services_discovery_t *p_sd )
 194 {
 195     vlc_event_t event;
 196
 197     event.type = vlc_ServicesDiscoveryStarted;
 198     vlc_event_send( &p_sd->event_manager, &event );
 199
 200     p_sd->pf_run( p_sd );
 201
 202     event.type = vlc_ServicesDiscoveryEnded;
 203     vlc_event_send( &p_sd->event_manager, &event );
 204     return;
 205 }
 206
 207 /*
 208  * Playlist - Services discovery bridge
 209  */
 210
 211  /* A new item has been added to a certain sd */
 212 static void playlist_sd_item_added( const vlc_event_t * p_event, void * user_data )
 213 {
 214     input_item_t * p_input = p_event->u.services_discovery_item_added.p_new_item;
 215     const char * psz_cat = p_event->u.services_discovery_item_added.psz_category;
 216     playlist_item_t *p_new_item, * p_parent = user_data;
 217
 218     msg_Dbg( p_parent->p_playlist, "Adding %s in %s",
 219                 p_input->psz_name ? p_input->psz_name : "(null)",
 220                 psz_cat ? psz_cat : "(null)" );
 221
 222     p_new_item = playlist_NodeAddInput( p_parent->p_playlist, p_input, p_parent,
 223                                         PLAYLIST_APPEND, PLAYLIST_END, false );
 224     if( p_new_item )
 225     {
 226         p_new_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 227         p_new_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
 228     }
 229 }
 230
 231  /* A new item has been removed from a certain sd */
 232 static void playlist_sd_item_removed( const vlc_event_t * p_event, void * user_data )
 233 {
 234     input_item_t * p_input = p_event->u.services_discovery_item_removed.p_item;
 235     playlist_item_t * p_parent = user_data;
 236     playlist_item_t * p_pl_item;
 237
 238     /* First make sure that if item is a node it will be deleted.
 239      * XXX: Why don't we have a function to ensure that in the playlist code ? */
 240     vlc_object_lock( p_parent->p_playlist );
 241     p_pl_item = playlist_ItemFindFromInputAndRoot( p_parent->p_playlist,
 242             p_input->i_id, p_parent, false );
 243
 244     if( p_pl_item && p_pl_item->i_children > -1 )
 245     {
 246         playlist_NodeDelete( p_parent->p_playlist, p_pl_item, true, false );
 247         vlc_object_unlock( p_parent->p_playlist );
 248         return;
 249     }
 250     vlc_object_unlock( p_parent->p_playlist );
 251
 252     /* Delete the non-node item normally */
 253     playlist_DeleteInputInParent( p_parent->p_playlist, p_input->i_id,
 254                                   p_parent, false );
 255 }
 256
 257 int playlist_ServicesDiscoveryAdd( playlist_t *p_playlist,  const char *psz_modules )
 258 {
 259     const char *psz_parser = psz_modules ?: "";
 260     int retval = VLC_SUCCESS;
 261
 262     for (;;)
 263     {
 264         struct playlist_services_discovery_support_t * p_sds;
 265         playlist_item_t * p_cat;
 266         playlist_item_t * p_one;
 267
 268         while( *psz_parser == ' ' || *psz_parser == ':' || *psz_parser == ',' )
 269             psz_parser++;
 270
 271         if( *psz_parser == '\0' )
 272             break;
 273
 274         const char *psz_next = strchr( psz_parser, ':' );
 275         if( psz_next == NULL )
 276             psz_next = psz_parser + strlen( psz_parser );
 277
 278         char psz_plugin[psz_next - psz_parser + 1];
 279         memcpy (psz_plugin, psz_parser, sizeof (psz_plugin) - 1);
 280         psz_plugin[sizeof (psz_plugin) - 1] = '\0';
 281         psz_parser = psz_next;
 282
 283         /* Perform the addition */
 284         msg_Dbg( p_playlist, "Add services_discovery %s", psz_plugin );
 285         services_discovery_t *p_sd;
 286
 287         p_sd = services_discovery_Create( (vlc_object_t*)p_playlist, psz_plugin );
 288         if( !p_sd )
 289             continue;
 290
 291         char * psz = services_discovery_GetLocalizedName( p_sd );
 292         assert( psz );
 293         playlist_NodesPairCreate( p_playlist, psz,
 294                 &p_cat, &p_one, false );
 295         free( psz );
 296
 297         vlc_event_attach( services_discovery_EventManager( p_sd ),
 298                           vlc_ServicesDiscoveryItemAdded,
 299                           playlist_sd_item_added,
 300                           p_one );
 301
 302         vlc_event_attach( services_discovery_EventManager( p_sd ),
 303                           vlc_ServicesDiscoveryItemAdded,
 304                           playlist_sd_item_added,
 305                           p_cat );
 306
 307         vlc_event_attach( services_discovery_EventManager( p_sd ),
 308                           vlc_ServicesDiscoveryItemRemoved,
 309                           playlist_sd_item_removed,
 310                           p_one );
 311
 312         vlc_event_attach( services_discovery_EventManager( p_sd ),
 313                           vlc_ServicesDiscoveryItemRemoved,
 314                           playlist_sd_item_removed,
 315                           p_cat );
 316
 317         services_discovery_Start( p_sd );
 318
 319         /* Free in playlist_ServicesDiscoveryRemove */
 320         p_sds = malloc( sizeof(struct playlist_services_discovery_support_t) );
 321         if( !p_sds )
 322         {
 323             msg_Err( p_playlist, "No more memory" );
 324             return VLC_ENOMEM;
 325         }
 326         p_sds->p_sd = p_sd;
 327         p_sds->p_one = p_one;
 328         p_sds->p_cat = p_cat;
 329
 330         PL_LOCK;
 331         TAB_APPEND( p_playlist->i_sds, p_playlist->pp_sds, p_sds );
 332         PL_UNLOCK;
 333     }
 334
 335     return retval;
 336 }
 337
 338 int playlist_ServicesDiscoveryRemove( playlist_t * p_playlist,
 339                                        const char *psz_module )
 340 {
 341     struct playlist_services_discovery_support_t * p_sds = NULL;
 342     int i;
 343
 344     PL_LOCK;
 345     for( i = 0 ; i< p_playlist->i_sds ; i ++ )
 346     {
 347         if( !strcmp( psz_module, p_playlist->pp_sds[i]->p_sd->psz_module ) )
 348         {
 349             p_sds = p_playlist->pp_sds[i];
 350             REMOVE_ELEM( p_playlist->pp_sds, p_playlist->i_sds, i );
 351             break;
 352         }
 353     }
 354     PL_UNLOCK;
 355
 356     if( !p_sds || !p_sds->p_sd )
 357     {
 358         msg_Warn( p_playlist, "module %s is not loaded", psz_module );
 359         return VLC_EGENERIC;
 360     }
 361
 362     services_discovery_Stop( p_sds->p_sd );
 363
 364     vlc_event_detach( services_discovery_EventManager( p_sds->p_sd ),
 365                         vlc_ServicesDiscoveryItemAdded,
 366                         playlist_sd_item_added,
 367                         p_sds->p_one );
 368
 369     vlc_event_detach( services_discovery_EventManager( p_sds->p_sd ),
 370                         vlc_ServicesDiscoveryItemAdded,
 371                         playlist_sd_item_added,
 372                         p_sds->p_cat );
 373
 374     vlc_event_detach( services_discovery_EventManager( p_sds->p_sd ),
 375                         vlc_ServicesDiscoveryItemRemoved,
 376                         playlist_sd_item_removed,
 377                         p_sds->p_one );
 378
 379     vlc_event_detach( services_discovery_EventManager( p_sds->p_sd ),
 380                         vlc_ServicesDiscoveryItemRemoved,
 381                         playlist_sd_item_removed,
 382                         p_sds->p_cat );
 383
 384     /* Remove the sd playlist node if it exists */
 385     PL_LOCK;
 386     if( p_sds->p_cat != p_playlist->p_root_category &&
 387         p_sds->p_one != p_playlist->p_root_onelevel )
 388     {
 389         playlist_NodeDelete( p_playlist, p_sds->p_cat, true, false );
 390         playlist_NodeDelete( p_playlist, p_sds->p_one, true, false );
 391     }
 392     PL_UNLOCK;
 393
 394     services_discovery_Destroy( p_sds->p_sd );
 395
 396     return VLC_SUCCESS;
 397 }
 398
 399 bool playlist_IsServicesDiscoveryLoaded( playlist_t * p_playlist,
 400                                               const char *psz_module )
 401 {
 402     int i;
 403     PL_LOCK;
 404
 405     for( i = 0 ; i< p_playlist->i_sds ; i ++ )
 406     {
 407         if( !strcmp( psz_module, p_playlist->pp_sds[i]->p_sd->psz_module ) )
 408         {
 409             PL_UNLOCK;
 410             return true;
 411         }
 412     }
 413     PL_UNLOCK;
 414     return false;
 415 }
 416