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 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <assert.h>
  29
  30 #include <vlc/libvlc.h>
  31 #include <vlc/libvlc_media.h>
  32 #include <vlc/libvlc_media_list.h>
  33 #include <vlc/libvlc_media_discoverer.h>
  34 #include <vlc/libvlc_events.h>
  35
  36 #include <vlc_services_discovery.h>
  37
  38 #include "libvlc_internal.h"
  39 #include "media_internal.h" // libvlc_media_new_from_input_item()
  40 #include "media_list_internal.h" // _libvlc_media_list_add_media()
  41
  42 struct libvlc_media_discoverer_t
  43 {
  44     libvlc_event_manager_t * p_event_manager;
  45     libvlc_instance_t *      p_libvlc_instance;
  46     services_discovery_t *   p_sd;
  47     libvlc_media_list_t *    p_mlist;
  48     bool                     running;
  49     vlc_dictionary_t         catname_to_submedialist;
  50 };
  51
  52 /*
  53  * Private functions
  54  */
  55
  56 /**************************************************************************
  57  *       services_discovery_item_added (Private) (VLC event callback)
  58  **************************************************************************/
  59
  60 static void services_discovery_item_added( const vlc_event_t * p_event,
  61                                            void * user_data )
  62 {
  63     input_item_t * p_item = p_event->u.services_discovery_item_added.p_new_item;
  64     const char * psz_cat = p_event->u.services_discovery_item_added.psz_category;
  65     libvlc_media_t * p_md;
  66     libvlc_media_discoverer_t * p_mdis = user_data;
  67     libvlc_media_list_t * p_mlist = p_mdis->p_mlist;
  68
  69     p_md = libvlc_media_new_from_input_item(
  70             p_mdis->p_libvlc_instance,
  71             p_item, NULL );
  72
  73     /* If we have a category, that mean we have to group the items having
  74      * that category in a media_list. */
  75     if( psz_cat )
  76     {
  77         p_mlist = vlc_dictionary_value_for_key( &p_mdis->catname_to_submedialist, psz_cat );
  78
  79         if( p_mlist == kVLCDictionaryNotFound )
  80         {
  81             libvlc_media_t * p_catmd;
  82             p_catmd = libvlc_media_new_as_node( p_mdis->p_libvlc_instance, psz_cat, NULL );
  83             p_mlist = libvlc_media_subitems( p_catmd );
  84             p_mlist->b_read_only = true;
  85
  86             /* Insert the newly created mlist in our dictionary */
  87             vlc_dictionary_insert( &p_mdis->catname_to_submedialist, psz_cat, p_mlist );
  88
  89             /* Insert the md into the root list */
  90             libvlc_media_list_lock( p_mdis->p_mlist );
  91             _libvlc_media_list_add_media( p_mdis->p_mlist, p_catmd, NULL );
  92             libvlc_media_list_unlock( p_mdis->p_mlist );
  93
  94             /* We don't release the mlist cause the dictionary
  95              * doesn't retain the object. But we release the md. */
  96             libvlc_media_release( p_catmd );
  97         }
  98     }
  99
 100     libvlc_media_list_lock( p_mlist );
 101     _libvlc_media_list_add_media( p_mlist, p_md, NULL );
 102     libvlc_media_list_unlock( p_mlist );
 103 }
 104
 105 /**************************************************************************
 106  *       services_discovery_item_removed (Private) (VLC event callback)
 107  **************************************************************************/
 108
 109 static void services_discovery_item_removed( const vlc_event_t * p_event,
 110                                              void * user_data )
 111 {
 112     input_item_t * p_item = p_event->u.services_discovery_item_added.p_new_item;
 113     libvlc_media_t * p_md;
 114     libvlc_media_discoverer_t * p_mdis = user_data;
 115
 116     int i, count = libvlc_media_list_count( p_mdis->p_mlist, NULL );
 117     libvlc_media_list_lock( p_mdis->p_mlist );
 118     for( i = 0; i < count; i++ )
 119     {
 120         p_md = libvlc_media_list_item_at_index( p_mdis->p_mlist, i, NULL );
 121         if( p_md->p_input_item == p_item )
 122         {
 123             _libvlc_media_list_remove_index( p_mdis->p_mlist, i, NULL );
 124             break;
 125         }
 126     }
 127     libvlc_media_list_unlock( p_mdis->p_mlist );
 128 }
 129
 130 /**************************************************************************
 131  *       services_discovery_started (Private) (VLC event callback)
 132  **************************************************************************/
 133
 134 static void services_discovery_started( const vlc_event_t * p_event,
 135                                         void * user_data )
 136 {
 137     VLC_UNUSED(p_event);
 138     libvlc_media_discoverer_t * p_mdis = user_data;
 139     libvlc_event_t event;
 140     p_mdis->running = true;
 141     event.type = libvlc_MediaDiscovererStarted;
 142     libvlc_event_send( p_mdis->p_event_manager, &event );
 143 }
 144
 145 /**************************************************************************
 146  *       services_discovery_ended (Private) (VLC event callback)
 147  **************************************************************************/
 148
 149 static void services_discovery_ended( const vlc_event_t * p_event,
 150                                       void * user_data )
 151 {
 152     VLC_UNUSED(p_event);
 153     libvlc_media_discoverer_t * p_mdis = user_data;
 154     libvlc_event_t event;
 155     p_mdis->running = false;
 156     event.type = libvlc_MediaDiscovererEnded;
 157     libvlc_event_send( p_mdis->p_event_manager, &event );
 158 }
 159
 160 /*
 161  * Public libvlc functions
 162  */
 163
 164 /**************************************************************************
 165  *       new (Public)
 166  *
 167  * Init an object.
 168  **************************************************************************/
 169 libvlc_media_discoverer_t *
 170 libvlc_media_discoverer_new_from_name( libvlc_instance_t * p_inst,
 171                                        const char * psz_name,
 172                                        libvlc_exception_t * p_e )
 173 {
 174     libvlc_media_discoverer_t * p_mdis;
 175
 176     p_mdis = malloc(sizeof(libvlc_media_discoverer_t));
 177     if( !p_mdis )
 178     {
 179         libvlc_exception_raise( p_e );
 180         libvlc_printerr( "Not enough memory" );
 181         return NULL;
 182     }
 183
 184     p_mdis->p_libvlc_instance = p_inst;
 185     p_mdis->p_mlist = libvlc_media_list_new( p_inst, NULL );
 186     p_mdis->p_mlist->b_read_only = true;
 187     p_mdis->running = false;
 188
 189     vlc_dictionary_init( &p_mdis->catname_to_submedialist, 0 );
 190
 191     p_mdis->p_event_manager = libvlc_event_manager_new( p_mdis,
 192             p_inst, NULL );
 193
 194     libvlc_event_manager_register_event_type( p_mdis->p_event_manager,
 195             libvlc_MediaDiscovererStarted, NULL );
 196     libvlc_event_manager_register_event_type( p_mdis->p_event_manager,
 197             libvlc_MediaDiscovererEnded, NULL );
 198
 199     p_mdis->p_sd = vlc_sd_Create( (vlc_object_t*)p_inst->p_libvlc_int );
 200
 201     if( !p_mdis->p_sd )
 202     {
 203         libvlc_media_list_release( p_mdis->p_mlist );
 204         libvlc_exception_raise( p_e );
 205         libvlc_printerr( "%s: no such discovery module found", psz_name );
 206         free( p_mdis );
 207         return NULL;
 208     }
 209
 210     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 211                       vlc_ServicesDiscoveryItemAdded,
 212                       services_discovery_item_added,
 213                       p_mdis );
 214     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 215                       vlc_ServicesDiscoveryItemRemoved,
 216                       services_discovery_item_removed,
 217                       p_mdis );
 218     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 219                       vlc_ServicesDiscoveryStarted,
 220                       services_discovery_started,
 221                       p_mdis );
 222     vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
 223                       vlc_ServicesDiscoveryEnded,
 224                       services_discovery_ended,
 225                       p_mdis );
 226
 227     /* Here we go */
 228     if( !vlc_sd_Start( p_mdis->p_sd, psz_name ) )
 229     {
 230         libvlc_media_list_release( p_mdis->p_mlist );
 231         libvlc_exception_raise( p_e );
 232         libvlc_printerr( "%s: internal module error", psz_name );
 233         free( p_mdis );
 234         return NULL;
 235     }
 236
 237     return p_mdis;
 238 }
 239
 240 /**************************************************************************
 241  * release (Public)
 242  **************************************************************************/
 243 void
 244 libvlc_media_discoverer_release( libvlc_media_discoverer_t * p_mdis )
 245 {
 246     int i;
 247
 248     libvlc_media_list_release( p_mdis->p_mlist );
 249     vlc_sd_StopAndDestroy( p_mdis->p_sd );
 250
 251     /* Free catname_to_submedialist and all the mlist */
 252     char ** all_keys = vlc_dictionary_all_keys( &p_mdis->catname_to_submedialist );
 253     for( i = 0; all_keys[i]; i++ )
 254     {
 255         libvlc_media_list_t * p_catmlist = vlc_dictionary_value_for_key( &p_mdis->catname_to_submedialist, all_keys[i] );
 256         libvlc_media_list_release( p_catmlist );
 257         free( all_keys[i] );
 258     }
 259     free( all_keys );
 260
 261     vlc_dictionary_clear( &p_mdis->catname_to_submedialist, NULL, NULL );
 262     libvlc_event_manager_release( p_mdis->p_event_manager );
 263
 264     free( p_mdis );
 265 }
 266
 267 /**************************************************************************
 268  * localized_name (Public)
 269  **************************************************************************/
 270 char *
 271 libvlc_media_discoverer_localized_name( libvlc_media_discoverer_t * p_mdis )
 272 {
 273     return services_discovery_GetLocalizedName( p_mdis->p_sd );
 274 }
 275
 276 /**************************************************************************
 277  * media_list (Public)
 278  **************************************************************************/
 279 libvlc_media_list_t *
 280 libvlc_media_discoverer_media_list( libvlc_media_discoverer_t * p_mdis )
 281 {
 282     libvlc_media_list_retain( p_mdis->p_mlist );
 283     return p_mdis->p_mlist;
 284 }
 285
 286 /**************************************************************************
 287  * event_manager (Public)
 288  **************************************************************************/
 289 libvlc_event_manager_t *
 290 libvlc_media_discoverer_event_manager( libvlc_media_discoverer_t * p_mdis )
 291 {
 292     return p_mdis->p_event_manager;
 293 }
 294
 295
 296 /**************************************************************************
 297  * running (Public)
 298  **************************************************************************/
 299 int
 300 libvlc_media_discoverer_is_running( libvlc_media_discoverer_t * p_mdis )
 301 {
 302     return p_mdis->running;
 303 }