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  *       Stop (Public)
 143  **************************************************************************/
 144 static vlc_bool_t
 145 libvlc_media_list_player_is_playing( libvlc_media_list_player_t * p_mlp,
 146                                     libvlc_exception_t * p_e )
 147 {
 148     libvlc_exception_raise( p_e, "Unimplemented" );
 149     return 0;
 150 }
 151
 152 /**************************************************************************
 153  *       Next (private)
 154  *
 155  * Playlist lock should be held
 156  **************************************************************************/
 157 static void
 158 media_list_player_set_next( libvlc_media_list_player_t * p_mlp, int index,
 159                             libvlc_exception_t * p_e )
 160 {
 161         libvlc_media_descriptor_t * p_md;
 162
 163         p_md = libvlc_media_list_item_at_index( p_mlp->p_mlist, index, p_e );
 164         if( !p_md )
 165         {
 166                 libvlc_media_list_unlock( p_mlp->p_mlist );
 167                 if( !libvlc_exception_raised( p_e ) )
 168                         libvlc_exception_raise( p_e, "Can't obtain a media" );
 169                 return;
 170         }
 171
 172     vlc_mutex_lock( &p_mlp->object_lock );
 173
 174     p_mlp->i_current_playing_index = index;
 175
 176         /* We are not interested in getting media_descriptor stop event now */
 177         uninstall_media_instance_observer( p_mlp );
 178     libvlc_media_instance_set_media_descriptor( p_mlp->p_mi, p_md, NULL );
 179 //      wait_playing_state(); /* If we want to be synchronous */
 180         install_media_instance_observer( p_mlp );
 181
 182     vlc_mutex_unlock( &p_mlp->object_lock );
 183
 184         libvlc_media_list_unlock( p_mlp->p_mlist );
 185
 186         libvlc_media_descriptor_release( p_md ); /* for libvlc_media_list_item_at_index */
 187 }
 188
 189 /*
 190  * Public libvlc functions
 191  */
 192
 193 /**************************************************************************
 194  *         libvlc_media_list_player_new (Public)
 195  **************************************************************************/
 196 libvlc_media_list_player_t *
 197 libvlc_media_list_player_new( libvlc_instance_t * p_instance,
 198                               libvlc_exception_t * p_e )
 199 {
 200     (void)p_e;
 201     libvlc_media_list_player_t * p_mlp;
 202     p_mlp = malloc(sizeof(libvlc_media_list_player_t));
 203         p_mlp->i_current_playing_index = -1;
 204     p_mlp->p_mi = NULL;
 205     p_mlp->p_mlist = NULL;
 206     vlc_mutex_init( p_instance->p_libvlc_int, &p_mlp->object_lock );
 207
 208         return p_mlp;
 209 }
 210
 211 /**************************************************************************
 212  *         libvlc_media_list_player_release (Public)
 213  **************************************************************************/
 214 void libvlc_media_list_player_release( libvlc_media_list_player_t * p_mlp )
 215 {
 216     free(p_mlp);
 217 }
 218
 219 /**************************************************************************
 220  *        libvlc_media_list_player_set_media_instance (Public)
 221  **************************************************************************/
 222 void libvlc_media_list_player_set_media_instance(
 223                                      libvlc_media_list_player_t * p_mlp,
 224                                      libvlc_media_instance_t * p_mi,
 225                                      libvlc_exception_t * p_e )
 226 {
 227     vlc_mutex_lock( &p_mlp->object_lock );
 228
 229         if( p_mlp->p_mi )
 230         {
 231                 uninstall_media_instance_observer( p_mlp );
 232                 libvlc_media_instance_release( p_mlp->p_mi );
 233         }
 234         libvlc_media_instance_retain( p_mi );
 235         p_mlp->p_mi = p_mi;
 236
 237     install_media_instance_observer( p_mlp );
 238
 239     vlc_mutex_unlock( &p_mlp->object_lock );
 240 }
 241
 242 /**************************************************************************
 243  *       Set a playlist (Public)
 244  **************************************************************************/
 245 void libvlc_media_list_player_set_media_list(
 246                                      libvlc_media_list_player_t * p_mlp,
 247                                      libvlc_media_list_t * p_mlist,
 248                                      libvlc_exception_t * p_e )
 249 {
 250     vlc_mutex_lock( &p_mlp->object_lock );
 251
 252         if( libvlc_media_list_player_is_playing( p_mlp, p_e ) )
 253                 libvlc_media_list_player_stop( p_mlp, p_e );
 254
 255         if( p_mlp->p_mlist )
 256         {
 257                 uninstall_playlist_observer( p_mlp );
 258                 libvlc_media_list_release( p_mlp->p_mlist );
 259         }
 260         libvlc_media_list_retain( p_mlist );
 261         p_mlp->p_mlist = p_mlist;
 262
 263         install_playlist_observer( p_mlp );
 264
 265     vlc_mutex_unlock( &p_mlp->object_lock );
 266 }
 267
 268 /**************************************************************************
 269  *        Play (Public)
 270  **************************************************************************/
 271 void libvlc_media_list_player_play( libvlc_media_list_player_t * p_mlp,
 272                                   libvlc_exception_t * p_e )
 273 {
 274         libvlc_media_list_player_next( p_mlp, p_e );
 275
 276         if( libvlc_exception_raised( p_e ) )
 277                 return;
 278
 279         libvlc_media_instance_play( p_mlp->p_mi, p_e );
 280 }
 281
 282 /**************************************************************************
 283  *        Play item at index (Public)
 284  *
 285  * Playlist lock should be help
 286  **************************************************************************/
 287 void libvlc_media_list_player_play_item_at_index(
 288                         libvlc_media_list_player_t * p_mlp,
 289                         int i_index,
 290                         libvlc_exception_t * p_e )
 291 {
 292         media_list_player_set_next( p_mlp, i_index, p_e );
 293
 294         if( libvlc_exception_raised( p_e ) )
 295                 return;
 296
 297         libvlc_media_instance_play( p_mlp->p_mi, p_e );
 298 }
 299
 300
 301 /**************************************************************************
 302  *       Stop (Public)
 303  **************************************************************************/
 304 void libvlc_media_list_player_stop( libvlc_media_list_player_t * p_mlp,
 305                                     libvlc_exception_t * p_e )
 306 {
 307         libvlc_media_instance_stop( p_mlp->p_mi, p_e );
 308
 309     vlc_mutex_lock( &p_mlp->object_lock );
 310         p_mlp->i_current_playing_index = -1;
 311     vlc_mutex_unlock( &p_mlp->object_lock );
 312 }
 313
 314 /**************************************************************************
 315  *       Next (Public)
 316  **************************************************************************/
 317 void libvlc_media_list_player_next( libvlc_media_list_player_t * p_mlp,
 318                                     libvlc_exception_t * p_e )
 319 {
 320         int index;
 321
 322         libvlc_media_list_lock( p_mlp->p_mlist );
 323
 324         index = get_next_index( p_mlp );
 325
 326         if( index < 0 )
 327         {
 328                 libvlc_media_list_unlock( p_mlp->p_mlist );
 329                 libvlc_exception_raise( p_e, "No more element to play" );
 330                 libvlc_media_list_player_stop( p_mlp, p_e );
 331                 return;
 332         }
 333
 334         media_list_player_set_next( p_mlp, index, p_e );
 335
 336     libvlc_media_list_unlock( p_mlp->p_mlist );
 337 }
 338