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

   1 /*****************************************************************************
   2  * media_list_player.c: libvlc new API media_list player 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 #include "libvlc_internal.h"
  24 #include <vlc/libvlc.h>
  25
  26 /*
  27  * Private functions
  28  */
  29
  30 /**************************************************************************
  31  *       get_next_index (private)
  32  *
  33  * Simple next item fetcher.
  34  **************************************************************************/
  35 static int get_next_index( libvlc_media_list_player_t * p_mlp )
  36 {
  37         /* We are entered with libvlc_media_list_lock( p_mlp->p_list ) */
  38
  39         int next = p_mlp->i_current_playing_index + 1;
  40
  41         if( next >= libvlc_media_list_count( p_mlp->p_mlist, NULL ) )
  42                 return -1; /* no more to play */
  43
  44         return next;
  45 }
  46
  47 /**************************************************************************
  48  *       media_instance_reached_end (private) (Event Callback)
  49  **************************************************************************/
  50 static void
  51 media_instance_reached_end( const libvlc_event_t * p_event,
  52                             void * p_user_data )
  53 {
  54         libvlc_media_list_player_t * p_mlp = p_user_data;
  55         libvlc_media_instance_t * p_mi = p_event->p_obj;
  56     libvlc_media_descriptor_t *p_md, * p_current_md;
  57     p_md = libvlc_media_instance_get_media_descriptor( p_mi, NULL );
  58     /* XXX: need if p_mlp->p_current_playing_index is beyond */
  59     p_current_md = libvlc_media_list_item_at_index(
  60                         p_mlp->p_mlist,
  61                         p_mlp->i_current_playing_index,
  62                         NULL );
  63         if( p_md != p_current_md )
  64         {
  65                 msg_Warn( p_mlp->p_libvlc_instance->p_libvlc_int,
  66                                   "We are not sync-ed with the media instance" );
  67         libvlc_media_descriptor_release( p_md );
  68         libvlc_media_descriptor_release( p_current_md );
  69                 return;
  70         }
  71     libvlc_media_descriptor_release( p_md );
  72     libvlc_media_descriptor_release( p_current_md );
  73         libvlc_media_list_player_next( p_mlp, NULL );
  74 }
  75
  76 /**************************************************************************
  77  *       playlist_item_deleted (private) (Event Callback)
  78  **************************************************************************/
  79 static void
  80 mlist_item_deleted( const libvlc_event_t * p_event, void * p_user_data )
  81 {
  82     libvlc_media_descriptor_t * p_current_md;
  83         libvlc_media_list_player_t * p_mlp = p_user_data;
  84         libvlc_media_list_t * p_emitting_mlist = p_event->p_obj;
  85     /* XXX: need if p_mlp->p_current_playing_index is beyond */
  86     p_current_md = libvlc_media_list_item_at_index(
  87                         p_mlp->p_mlist,
  88                         p_mlp->i_current_playing_index,
  89                         NULL );
  90
  91         if( p_event->u.media_list_item_deleted.item == p_current_md &&
  92             p_emitting_mlist == p_mlp->p_mlist )
  93         {
  94                 /* We are playing this item, we choose to stop */
  95                 libvlc_media_list_player_stop( p_mlp, NULL );
  96         }
  97 }
  98
  99 /**************************************************************************
 100  *       install_playlist_observer (private)
 101  **************************************************************************/
 102 static void
 103 install_playlist_observer( libvlc_media_list_player_t * p_mlp )
 104 {
 105         libvlc_event_attach( libvlc_media_list_event_manager( p_mlp->p_mlist, NULL ),
 106             libvlc_MediaListItemDeleted, mlist_item_deleted, p_mlp, NULL );
 107 }
 108
 109 /**************************************************************************
 110  *       uninstall_playlist_observer (private)
 111  **************************************************************************/
 112 static void
 113 uninstall_playlist_observer( libvlc_media_list_player_t * p_mlp )
 114 {
 115     libvlc_event_detach( libvlc_media_list_event_manager( p_mlp->p_mlist, NULL ),
 116             libvlc_MediaListItemDeleted, mlist_item_deleted, p_mlp, NULL );
 117 }
 118
 119 /**************************************************************************
 120  *       install_media_instance_observer (private)
 121  **************************************************************************/
 122 static void
 123 install_media_instance_observer( libvlc_media_list_player_t * p_mlp )
 124 {
 125         libvlc_event_attach( libvlc_media_instance_event_manager( p_mlp->p_mi, NULL ),
 126                          libvlc_MediaInstanceReachedEnd,
 127                                               media_instance_reached_end, p_mlp, NULL );
 128 }
 129
 130
 131 /**************************************************************************
 132  *       uninstall_media_instance_observer (private)
 133  **************************************************************************/
 134 static void
 135 uninstall_media_instance_observer( libvlc_media_list_player_t * p_mlp )
 136 {
 137         libvlc_event_detach( libvlc_media_instance_event_manager( p_mlp->p_mi, NULL ),
 138                          libvlc_MediaInstanceReachedEnd,
 139                                              media_instance_reached_end, p_mlp, NULL );
 140 }
 141
 142 /**************************************************************************
 143  *       Stop (Public)
 144  **************************************************************************/
 145 static vlc_bool_t
 146 libvlc_media_list_player_is_playing( libvlc_media_list_player_t * p_mlp,
 147                                     libvlc_exception_t * p_e )
 148 {
 149     libvlc_exception_raise( p_e, "Unimplemented" );
 150     return 0;
 151 }
 152
 153 /**************************************************************************
 154  *       Next (private)
 155  *
 156  * Playlist lock should be held
 157  **************************************************************************/
 158 static void
 159 media_list_player_set_next( libvlc_media_list_player_t * p_mlp, int index,
 160                             libvlc_exception_t * p_e )
 161 {
 162         libvlc_media_descriptor_t * p_md;
 163
 164         p_md = libvlc_media_list_item_at_index( p_mlp->p_mlist, index, p_e );
 165         if( !p_md )
 166         {
 167                 libvlc_media_list_unlock( p_mlp->p_mlist );
 168                 if( !libvlc_exception_raised( p_e ) )
 169                         libvlc_exception_raise( p_e, "Can't obtain a media" );
 170                 return;
 171         }
 172
 173     vlc_mutex_lock( &p_mlp->object_lock );
 174
 175     p_mlp->i_current_playing_index = index;
 176
 177         /* We are not interested in getting media_descriptor stop event now */
 178         uninstall_media_instance_observer( p_mlp );
 179     libvlc_media_instance_set_media_descriptor( p_mlp->p_mi, p_md, NULL );
 180 //      wait_playing_state(); /* If we want to be synchronous */
 181         install_media_instance_observer( p_mlp );
 182
 183     vlc_mutex_unlock( &p_mlp->object_lock );
 184
 185         libvlc_media_list_unlock( p_mlp->p_mlist );
 186
 187         libvlc_media_descriptor_release( p_md ); /* for libvlc_media_list_item_at_index */
 188 }
 189
 190 /*
 191  * Public libvlc functions
 192  */
 193
 194 /**************************************************************************
 195  *         new (Public)
 196  **************************************************************************/
 197 libvlc_media_list_player_t *
 198 libvlc_media_list_player_new( libvlc_instance_t * p_instance,
 199                               libvlc_exception_t * p_e )
 200 {
 201     (void)p_e;
 202     libvlc_media_list_player_t * p_mlp;
 203     p_mlp = malloc(sizeof(libvlc_media_list_player_t));
 204         p_mlp->i_current_playing_index = -1;
 205     p_mlp->p_mi = NULL;
 206     p_mlp->p_mlist = NULL;
 207     vlc_mutex_init( p_instance->p_libvlc_int, &p_mlp->object_lock );
 208     p_mlp->p_event_manager = libvlc_event_manager_new( p_mlp,
 209                                                        p_instance,
 210                                                        p_e );
 211     libvlc_event_manager_register_event_type( p_mlp->p_event_manager,
 212             libvlc_MediaListPlayerNextItemSet, p_e );
 213     libvlc_event_manager_register_event_type( p_mlp->p_event_manager,
 214             libvlc_MediaListPlayerNextItemSet, p_e );
 215
 216         return p_mlp;
 217 }
 218
 219 /**************************************************************************
 220  *         release (Public)
 221  **************************************************************************/
 222 void libvlc_media_list_player_release( libvlc_media_list_player_t * p_mlp )
 223 {
 224     libvlc_event_manager_release( p_mlib->p_event_manager );
 225     free(p_mlp);
 226 }
 227
 228 /**************************************************************************
 229  *        set_media_instance (Public)
 230  **************************************************************************/
 231 void libvlc_media_list_player_set_media_instance(
 232                                      libvlc_media_list_player_t * p_mlp,
 233                                      libvlc_media_instance_t * p_mi,
 234                                      libvlc_exception_t * p_e )
 235 {
 236     vlc_mutex_lock( &p_mlp->object_lock );
 237
 238         if( p_mlp->p_mi )
 239         {
 240                 uninstall_media_instance_observer( p_mlp );
 241                 libvlc_media_instance_release( p_mlp->p_mi );
 242         }
 243         libvlc_media_instance_retain( p_mi );
 244         p_mlp->p_mi = p_mi;
 245
 246     install_media_instance_observer( p_mlp );
 247
 248     vlc_mutex_unlock( &p_mlp->object_lock );
 249 }
 250
 251 /**************************************************************************
 252  *       set_media_list (Public)
 253  **************************************************************************/
 254 void libvlc_media_list_player_set_media_list(
 255                                      libvlc_media_list_player_t * p_mlp,
 256                                      libvlc_media_list_t * p_mlist,
 257                                      libvlc_exception_t * p_e )
 258 {
 259     vlc_mutex_lock( &p_mlp->object_lock );
 260
 261         if( libvlc_media_list_player_is_playing( p_mlp, p_e ) )
 262                 libvlc_media_list_player_stop( p_mlp, p_e );
 263
 264         if( p_mlp->p_mlist )
 265         {
 266                 uninstall_playlist_observer( p_mlp );
 267                 libvlc_media_list_release( p_mlp->p_mlist );
 268         }
 269         libvlc_media_list_retain( p_mlist );
 270         p_mlp->p_mlist = p_mlist;
 271
 272         install_playlist_observer( p_mlp );
 273
 274     vlc_mutex_unlock( &p_mlp->object_lock );
 275 }
 276
 277 /**************************************************************************
 278  *        Play (Public)
 279  **************************************************************************/
 280 void libvlc_media_list_player_play( libvlc_media_list_player_t * p_mlp,
 281                                   libvlc_exception_t * p_e )
 282 {
 283     if( p_mlp->i_current_playing_index < 0 )
 284     {
 285         libvlc_media_list_player_next( p_mlp, p_e );
 286         return; /* Will set to play */
 287     }
 288
 289         libvlc_media_instance_play( p_mlp->p_mi, p_e );
 290 }
 291
 292 /**************************************************************************
 293  *        Play item at index (Public)
 294  *
 295  * Playlist lock should be help
 296  **************************************************************************/
 297 void libvlc_media_list_player_play_item_at_index(
 298                         libvlc_media_list_player_t * p_mlp,
 299                         int i_index,
 300                         libvlc_exception_t * p_e )
 301 {
 302         media_list_player_set_next( p_mlp, i_index, p_e );
 303
 304         if( libvlc_exception_raised( p_e ) )
 305                 return;
 306
 307     /* Send the next item event */
 308     libvlc_event_t event;
 309     event.type = libvlc_MediaListPlayerNextItemSet;
 310     libvlc_event_send( p_mlp->p_event_manager, &event );
 311
 312         libvlc_media_instance_play( p_mlp->p_mi, p_e );
 313 }
 314
 315
 316 /**************************************************************************
 317  *       Stop (Public)
 318  **************************************************************************/
 319 void libvlc_media_list_player_stop( libvlc_media_list_player_t * p_mlp,
 320                                     libvlc_exception_t * p_e )
 321 {
 322         libvlc_media_instance_stop( p_mlp->p_mi, p_e );
 323
 324     vlc_mutex_lock( &p_mlp->object_lock );
 325         p_mlp->i_current_playing_index = -1;
 326     vlc_mutex_unlock( &p_mlp->object_lock );
 327 }
 328
 329 /**************************************************************************
 330  *       Next (Public)
 331  **************************************************************************/
 332 void libvlc_media_list_player_next( libvlc_media_list_player_t * p_mlp,
 333                                     libvlc_exception_t * p_e )
 334 {
 335         int index;
 336
 337         libvlc_media_list_lock( p_mlp->p_mlist );
 338
 339         index = get_next_index( p_mlp );
 340
 341         if( index < 0 )
 342         {
 343                 libvlc_media_list_unlock( p_mlp->p_mlist );
 344                 libvlc_exception_raise( p_e, "No more element to play" );
 345                 libvlc_media_list_player_stop( p_mlp, p_e );
 346                 return;
 347         }
 348
 349         media_list_player_set_next( p_mlp, index, p_e );
 350
 351     libvlc_media_instance_play( p_mlp->p_mi, p_e );
 352
 353     libvlc_media_list_unlock( p_mlp->p_mlist );
 354
 355     /* Send the next item event */
 356     libvlc_event_t event;
 357     event.type = libvlc_MediaListPlayerNextItemSet;
 358     libvlc_event_send( p_mlp->p_event_manager, &event);
 359 }
 360