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 <assert.h>
  25
  26 #include <vlc/libvlc.h>
  27 #include <vlc/libvlc_media.h>
  28 #include <vlc/libvlc_media_list.h>
  29 #include <vlc/libvlc_media_discoverer.h>
  30 #include <vlc/libvlc_events.h>
  31
  32 #include <vlc_services_discovery.h>
  33
  34 #include "libvlc_internal.h"
  35 #include "media_internal.h" // libvlc_media_new_from_input_item()
  36 #include "media_list_internal.h" // _libvlc_media_list_add_media()
  37
  38 struct libvlc_media_discoverer_t
  39 {
  40     libvlc_event_manager_t * p_event_manager;
  41     libvlc_instance_t *      p_libvlc_instance;
  42     services_discovery_t *   p_sd;
  43     libvlc_media_list_t *    p_mlist;
  44     bool                     running;
  45     vlc_dictionary_t         catname_to_submedialist;
  46 };
  47
  48 /*
  49  * Private functions
  50  */
  51
  52 /**************************************************************************
  53  *       services_discovery_item_added (Private) (VLC event callback)
  54  **************************************************************************/
  55
  56 static void services_discovery_item_added( const vlc_event_t * p_event,
  57                                            void * user_data )
  58 {
  59     input_item_t * p_item = p_event->u.services_discovery_item_added.p_new_item;
  60     const char * psz_cat = p_event->u.services_discovery_item_added.psz_category;
  61     libvlc_media_t * p_md;
  62     libvlc_media_discoverer_t * p_mdis = user_data;
  63     libvlc_media_list_t * p_mlist = p_mdis->p_mlist;
  64
  65     p_md = libvlc_media_new_from_input_item(
  66             p_mdis->p_libvlc_instance,
  67             p_item, NULL );
  68
  69     /* If we have a category, that mean we have to group the items having
  70      * that category in a media_list. */
  71     if( psz_cat )
  72     {
  73         p_mlist = vlc_dictionary_value_for_key( &p_mdis->catname_to_submedialist, psz_cat );
  74
  75         if( p_mlist == kVLCDictionaryNotFound )
  76         {
  77             libvlc_media_t * p_catmd;
  78             p_catmd = libvlc_media_new_as_node( p_mdis->p_libvlc_instance, psz_cat, NULL );
  79             p_mlist = libvlc_media_subitems( p_catmd, NULL );
  80             p_mlist->b_read_only = true;
  81
  82             /* Insert the newly created mlist in our dictionary */
  83             vlc_dictionary_insert( &p_mdis->catname_to_submedialist, psz_cat, p_mlist );
  84
  85             /* Insert the md into the root list */
  86             libvlc_media_list_lock( p_mdis->p_mlist );
  87             _libvlc_media_list_add_media( p_mdis->p_mlist, p_catmd, NULL );
  88             libvlc_media_list_unlock( p_mdis->p_mlist );
  89
  90             /* We don't release the mlist cause the dictionary
  91              * doesn't retain the object. But we release the md. */
  92             libvlc_media_release( p_catmd );
  93         }
  94     }
  95     else
  96     {
  97         libvlc_media_list_lock( p_mlist );
  98         _libvlc_media_list_add_media( p_mlist, p_md, NULL );
  99         libvlc_media_list_unlock( p_mlist );
 100     }
 101 }
 102
 103 /**************************************************************************
 104  *       services_discovery_item_removed (Private) (VLC event callback)
 105  **************************************************************************/
 106
 107 static void services_discovery_item_removed( const vlc_event_t * p_event,
 108                                              void * user_data )
 109 {
 110     input_item_t * p_item = p_event->u.services_discovery_item_added.p_new_item;
 111     libvlc_media_t * p_md;
 112     libvlc_media_discoverer_t * p_mdis = user_data;
 113
 114     int i, count = libvlc_media_list_count( p_mdis->p_mlist, NULL );
 115     libvlc_media_list_lock( p_mdis->p_mlist );
 116     for( i = 0; i < count; i++ )
 117     {
 118         p_md = libvlc_media_list_item_at_index( p_mdis->p_mlist, i, NULL );
 119         if( p_md->p_input_item == p_item )
 120         {
 121             _libvlc_media_list_remove_index( p_mdis->p_mlist, i, NULL );
 122             break;
 123         }
 124     }
 125     libvlc_media_list_unlock( p_mdis->p_mlist );
 126 }
 127
 128 /**************************************************************************
 129  *       services_discovery_started (Private) (VLC event callback)
 130  **************************************************************************/
 131
 132 static void services_discovery_started( const vlc_event_t * p_event,
 133                                         void * user_data )
 134 {
 135     VLC_UNUSED(p_event);
 136     libvlc_media_discoverer_t * p_mdis = user_data;
 137     libvlc_event_t event;
 138     p_mdis->running = true;
 139     event.type = libvlc_MediaDiscovererStarted;
 140     libvlc_event_send( p_mdis->p_event_manager, &event );
 141 }
 142
 143 /**************************************************************************
 144  *       services_discovery_ended (Private) (VLC event callback)
 145  **************************************************************************/
 146
 147 static void services_discovery_ended( const vlc_event_t * p_event,
 148                                       void * user_data )
 149 {
 150     VLC_UNUSED(p_event);
 151     libvlc_media_discoverer_t * p_mdis = user_data;
 152     libvlc_event_t event;
 153     p_mdis->running = false;
 154     event.type = libvlc_MediaDiscovererEnded;
 155     libvlc_event_send( p_mdis->p_event_manager, &event );
 156 }
 157
 158 /*
 159  * Public libvlc functions
 160  */
 161
 162 /**************************************************************************
 163  *       new (Public)
 164  *
 165  * Init an object.
 166  **************************************************************************/
 167 libvlc_media_discoverer_t *
 168 libvlc_media_discoverer_new_from_name( libvlc_instance_t * p_inst,
 169                                        const char * psz_name,
 170                                        libvlc_exception_t * p_e )
 171 {
 172     libvlc_media_discoverer_t * p_mdis;
 173
 174     p_mdis = malloc(sizeof(libvlc_media_discoverer_t));
 175     if( !p_mdis )
 176     {
 177         libvlc_exception_raise( p_e, "Not enough memory" );
 178         return NULL;
 179     }
 180
 181     p_mdis->p_libvlc_instance = p_inst;
 182     p_mdis->p_mlist = libvlc_media_list_new( p_inst, NULL );
 183     p_mdis->p_mlist->b_read_only = true;
 184     p_mdis->running = false;
 185
 186     vlc_dictionary_init( &p_mdis->catname_to_submedialist, 0 );
 187
 188     p_mdis->p_event_manager = libvlc_event_manager_new( p_mdis,
 189             p_inst, NULL );
 190
 191     libvlc_event_manager_register_event_type( p_mdis->p_event_manager,
 192             libvlc_MediaDiscovererStarted, NULL );
 193     libvlc_event_manager_register_event_type( p_mdis->p_event_manager,
 194             libvlc_MediaDiscovererEnded, NULL );
 195
 196     p_mdis->p_sd = vlc_sd_Create( (vlc_object_t*)p_inst->p_libvlc_int );
 197
 198     if( !p_mdis->p_sd )
 199     {
 200         libvlc_media_list_release( p_mdis->p_mlist );
 201         libvlc_exception_raise( p_e, "Can't find the services_discovery module named '%s'", psz_name );
 202         free( p_mdis );
 203         return NULL;
 204     }
 205
 206     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 207                       vlc_ServicesDiscoveryItemAdded,
 208                       services_discovery_item_added,
 209                       p_mdis );
 210     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 211                       vlc_ServicesDiscoveryItemRemoved,
 212                       services_discovery_item_removed,
 213                       p_mdis );
 214     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 215                       vlc_ServicesDiscoveryStarted,
 216                       services_discovery_started,
 217                       p_mdis );
 218     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 219                       vlc_ServicesDiscoveryEnded,
 220                       services_discovery_ended,
 221                       p_mdis );
 222
 223     /* Here we go */
 224     if( !vlc_sd_Start( p_mdis->p_sd, psz_name ) )
 225     {
 226         libvlc_media_list_release( p_mdis->p_mlist );
 227         libvlc_exception_raise( p_e, "Can't start the services_discovery module named '%s'", psz_name );
 228         free( p_mdis );
 229         return NULL;
 230     }
 231
 232     return p_mdis;
 233 }
 234
 235 /**************************************************************************
 236  * release (Public)
 237  **************************************************************************/
 238 void
 239 libvlc_media_discoverer_release( libvlc_media_discoverer_t * p_mdis )
 240 {
 241     int i;
 242
 243     libvlc_media_list_release( p_mdis->p_mlist );
 244     vlc_sd_StopAndDestroy( p_mdis->p_sd );
 245
 246     /* Free catname_to_submedialist and all the mlist */
 247     char ** all_keys = vlc_dictionary_all_keys( &p_mdis->catname_to_submedialist );
 248     for( i = 0; all_keys[i]; i++ )
 249     {
 250         libvlc_media_list_t * p_catmlist = vlc_dictionary_value_for_key( &p_mdis->catname_to_submedialist, all_keys[i] );
 251         libvlc_media_list_release( p_catmlist );
 252         free( all_keys[i] );
 253     }
 254     free( all_keys );
 255
 256     vlc_dictionary_clear( &p_mdis->catname_to_submedialist, NULL, NULL );
 257     libvlc_event_manager_release( p_mdis->p_event_manager );
 258
 259     free( p_mdis );
 260 }
 261
 262 /**************************************************************************
 263  * localized_name (Public)
 264  **************************************************************************/
 265 char *
 266 libvlc_media_discoverer_localized_name( libvlc_media_discoverer_t * p_mdis )
 267 {
 268     return services_discovery_GetLocalizedName( p_mdis->p_sd );
 269 }
 270
 271 /**************************************************************************
 272  * media_list (Public)
 273  **************************************************************************/
 274 libvlc_media_list_t *
 275 libvlc_media_discoverer_media_list( libvlc_media_discoverer_t * p_mdis )
 276 {
 277     libvlc_media_list_retain( p_mdis->p_mlist );
 278     return p_mdis->p_mlist;
 279 }
 280
 281 /**************************************************************************
 282  * event_manager (Public)
 283  **************************************************************************/
 284 libvlc_event_manager_t *
 285 libvlc_media_discoverer_event_manager( libvlc_media_discoverer_t * p_mdis )
 286 {
 287     return p_mdis->p_event_manager;
 288 }
 289
 290
 291 /**************************************************************************
 292  * running (Public)
 293  **************************************************************************/
 294 int
 295 libvlc_media_discoverer_is_running( libvlc_media_discoverer_t * p_mdis )
 296 {
 297     return p_mdis->running;
 298 }