git.sesse.net Git - vlc/blob - src/control/media_discoverer.c

   1 /*****************************************************************************
   2  * media_discoverer.c: libvlc new API media discoverer functions
   3  *****************************************************************************
   4  * Copyright (C) 2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Pierre d'Herbemont <pdherbemont # 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
  24 #include "libvlc_internal.h"
  25 #include <vlc/libvlc.h>
  26 #include <assert.h>
  27 #include "vlc_services_discovery.h"
  28
  29 /*
  30  * Private functions
  31  */
  32
  33 /**************************************************************************
  34  *       services_discovery_item_added (Private) (VLC event callback)
  35  **************************************************************************/
  36
  37 static void services_discovery_item_added( const vlc_event_t * p_event,
  38                                            void * user_data )
  39 {
  40     input_item_t * p_item = p_event->u.services_discovery_item_added.p_new_item;
  41     const char * psz_cat = p_event->u.services_discovery_item_added.psz_category;
  42     libvlc_media_t * p_md;
  43     libvlc_media_discoverer_t * p_mdis = user_data;
  44     libvlc_media_list_t * p_mlist = p_mdis->p_mlist;
  45
  46     p_md = libvlc_media_new_from_input_item(
  47             p_mdis->p_libvlc_instance,
  48             p_item, NULL );
  49
  50     /* If we have a category, that mean we have to group the items having
  51      * that category in a media_list. */
  52     if( psz_cat )
  53     {
  54         p_mlist = vlc_dictionary_value_for_key( &p_mdis->catname_to_submedialist, psz_cat );
  55
  56         if( p_mlist == kVLCDictionaryNotFound )
  57         {
  58             libvlc_media_t * p_catmd;
  59             p_catmd = libvlc_media_new_as_node( p_mdis->p_libvlc_instance, psz_cat, NULL );
  60             p_mlist = libvlc_media_subitems( p_catmd, NULL );
  61             p_mlist->b_read_only = true;
  62
  63             /* Insert the newly created mlist in our dictionary */
  64             vlc_dictionary_insert( &p_mdis->catname_to_submedialist, psz_cat, p_mlist );
  65
  66             /* Insert the md into the root list */
  67             libvlc_media_list_lock( p_mdis->p_mlist );
  68             _libvlc_media_list_add_media( p_mdis->p_mlist, p_catmd, NULL );
  69             libvlc_media_list_unlock( p_mdis->p_mlist );
  70
  71             /* We don't release the mlist cause the dictionary
  72              * doesn't retain the object. But we release the md. */
  73             libvlc_media_release( p_catmd );
  74         }
  75     }
  76     else
  77     {
  78         libvlc_media_list_lock( p_mlist );
  79         _libvlc_media_list_add_media( p_mlist, p_md, NULL );
  80         libvlc_media_list_unlock( p_mlist );
  81     }
  82 }
  83
  84 /**************************************************************************
  85  *       services_discovery_item_removed (Private) (VLC event callback)
  86  **************************************************************************/
  87
  88 static void services_discovery_item_removed( const vlc_event_t * p_event,
  89                                              void * user_data )
  90 {
  91     input_item_t * p_item = p_event->u.services_discovery_item_added.p_new_item;
  92     libvlc_media_t * p_md;
  93     libvlc_media_discoverer_t * p_mdis = user_data;
  94
  95     int i, count = libvlc_media_list_count( p_mdis->p_mlist, NULL );
  96     libvlc_media_list_lock( p_mdis->p_mlist );
  97     for( i = 0; i < count; i++ )
  98     {
  99         p_md = libvlc_media_list_item_at_index( p_mdis->p_mlist, i, NULL );
 100         if( p_md->p_input_item == p_item )
 101         {
 102             _libvlc_media_list_remove_index( p_mdis->p_mlist, i, NULL );
 103             break;
 104         }
 105     }
 106     libvlc_media_list_unlock( p_mdis->p_mlist );
 107 }
 108
 109 /**************************************************************************
 110  *       services_discovery_started (Private) (VLC event callback)
 111  **************************************************************************/
 112
 113 static void services_discovery_started( const vlc_event_t * p_event,
 114                                         void * user_data )
 115 {
 116     VLC_UNUSED(p_event);
 117     libvlc_media_discoverer_t * p_mdis = user_data;
 118     libvlc_event_t event;
 119     p_mdis->running = true;
 120     event.type = libvlc_MediaDiscovererStarted;
 121     libvlc_event_send( p_mdis->p_event_manager, &event );
 122 }
 123
 124 /**************************************************************************
 125  *       services_discovery_ended (Private) (VLC event callback)
 126  **************************************************************************/
 127
 128 static void services_discovery_ended( const vlc_event_t * p_event,
 129                                       void * user_data )
 130 {
 131     VLC_UNUSED(p_event);
 132     libvlc_media_discoverer_t * p_mdis = user_data;
 133     libvlc_event_t event;
 134     p_mdis->running = false;
 135     event.type = libvlc_MediaDiscovererEnded;
 136     libvlc_event_send( p_mdis->p_event_manager, &event );
 137 }
 138
 139 /*
 140  * Public libvlc functions
 141  */
 142
 143 /**************************************************************************
 144  *       new (Public)
 145  *
 146  * Init an object.
 147  **************************************************************************/
 148 libvlc_media_discoverer_t *
 149 libvlc_media_discoverer_new_from_name( libvlc_instance_t * p_inst,
 150                                        const char * psz_name,
 151                                        libvlc_exception_t * p_e )
 152 {
 153     libvlc_media_discoverer_t * p_mdis;
 154
 155     p_mdis = malloc(sizeof(libvlc_media_discoverer_t));
 156     if( !p_mdis )
 157     {
 158         libvlc_exception_raise( p_e, "Not enough memory" );
 159         return NULL;
 160     }
 161
 162     p_mdis->p_libvlc_instance = p_inst;
 163     p_mdis->p_mlist = libvlc_media_list_new( p_inst, NULL );
 164     p_mdis->p_mlist->b_read_only = true;
 165     p_mdis->running = false;
 166
 167     vlc_dictionary_init( &p_mdis->catname_to_submedialist, 0 );
 168
 169     p_mdis->p_event_manager = libvlc_event_manager_new( p_mdis,
 170             p_inst, NULL );
 171
 172     libvlc_event_manager_register_event_type( p_mdis->p_event_manager,
 173             libvlc_MediaDiscovererStarted, NULL );
 174     libvlc_event_manager_register_event_type( p_mdis->p_event_manager,
 175             libvlc_MediaDiscovererEnded, NULL );
 176
 177     p_mdis->p_sd = vlc_sd_Create( (vlc_object_t*)p_inst->p_libvlc_int );
 178
 179     if( !p_mdis->p_sd )
 180     {
 181         libvlc_media_list_release( p_mdis->p_mlist );
 182         libvlc_exception_raise( p_e, "Can't find the services_discovery module named '%s'", psz_name );
 183         free( p_mdis );
 184         return NULL;
 185     }
 186
 187     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 188                       vlc_ServicesDiscoveryItemAdded,
 189                       services_discovery_item_added,
 190                       p_mdis );
 191     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 192                       vlc_ServicesDiscoveryItemRemoved,
 193                       services_discovery_item_removed,
 194                       p_mdis );
 195     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 196                       vlc_ServicesDiscoveryStarted,
 197                       services_discovery_started,
 198                       p_mdis );
 199     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 200                       vlc_ServicesDiscoveryEnded,
 201                       services_discovery_ended,
 202                       p_mdis );
 203
 204     /* Here we go */
 205     if( !vlc_sd_Start( p_mdis->p_sd, psz_name ) )
 206     {
 207         libvlc_media_list_release( p_mdis->p_mlist );
 208         libvlc_exception_raise( p_e, "Can't start the services_discovery module named '%s'", psz_name );
 209         free( p_mdis );
 210         return NULL;
 211     }
 212
 213     return p_mdis;
 214 }
 215
 216 /**************************************************************************
 217  * release (Public)
 218  **************************************************************************/
 219 void
 220 libvlc_media_discoverer_release( libvlc_media_discoverer_t * p_mdis )
 221 {
 222     int i;
 223
 224     libvlc_media_list_release( p_mdis->p_mlist );
 225     vlc_sd_StopAndDestroy( p_mdis->p_sd );
 226
 227     /* Free catname_to_submedialist and all the mlist */
 228     char ** all_keys = vlc_dictionary_all_keys( &p_mdis->catname_to_submedialist );
 229     for( i = 0; all_keys[i]; i++ )
 230     {
 231         libvlc_media_list_t * p_catmlist = vlc_dictionary_value_for_key( &p_mdis->catname_to_submedialist, all_keys[i] );
 232         libvlc_media_list_release( p_catmlist );
 233         free( all_keys[i] );
 234     }
 235     free( all_keys );
 236
 237     vlc_dictionary_clear( &p_mdis->catname_to_submedialist, NULL, NULL );
 238     libvlc_event_manager_release( p_mdis->p_event_manager );
 239
 240     free( p_mdis );
 241 }
 242
 243 /**************************************************************************
 244  * localized_name (Public)
 245  **************************************************************************/
 246 char *
 247 libvlc_media_discoverer_localized_name( libvlc_media_discoverer_t * p_mdis )
 248 {
 249     return services_discovery_GetLocalizedName( p_mdis->p_sd );
 250 }
 251
 252 /**************************************************************************
 253  * media_list (Public)
 254  **************************************************************************/
 255 libvlc_media_list_t *
 256 libvlc_media_discoverer_media_list( libvlc_media_discoverer_t * p_mdis )
 257 {
 258     libvlc_media_list_retain( p_mdis->p_mlist );
 259     return p_mdis->p_mlist;
 260 }
 261
 262 /**************************************************************************
 263  * event_manager (Public)
 264  **************************************************************************/
 265 libvlc_event_manager_t *
 266 libvlc_media_discoverer_event_manager( libvlc_media_discoverer_t * p_mdis )
 267 {
 268     return p_mdis->p_event_manager;
 269 }
 270
 271
 272 /**************************************************************************
 273  * running (Public)
 274  **************************************************************************/
 275 int
 276 libvlc_media_discoverer_is_running( libvlc_media_discoverer_t * p_mdis )
 277 {
 278     return p_mdis->running;
 279 }