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