git.sesse.net Git - vlc/blob - src/playlist/thread.c

   1 /*****************************************************************************
   2  * thread.c : Playlist management functions
   3  *****************************************************************************
   4  * Copyright © 1999-2008 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Clément Stenac <zorglub@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <vlc_common.h>
  29 #include <vlc_es.h>
  30 #include <vlc_input.h>
  31 #include <vlc_interface.h>
  32 #include <vlc_playlist.h>
  33 #include "stream_output/stream_output.h"
  34 #include "playlist_internal.h"
  35
  36 /*****************************************************************************
  37  * Local prototypes
  38  *****************************************************************************/
  39 static void* RunControlThread   ( vlc_object_t * );
  40
  41 /*****************************************************************************
  42  * Main functions for the global thread
  43  *****************************************************************************/
  44
  45 /**
  46  * Create the main playlist threads.
  47  * Additionally to the playlist, this thread controls :
  48  *    - Statistics
  49  *    - VLM
  50  * \param p_parent
  51  * \return an object with a started thread
  52  */
  53 void playlist_Activate( playlist_t *p_playlist )
  54 {
  55     /* */
  56     playlist_private_t *p_sys = pl_priv(p_playlist);
  57
  58     /* Fetcher */
  59     p_sys->p_fetcher = playlist_fetcher_New( p_playlist );
  60     if( !p_sys->p_fetcher )
  61         msg_Err( p_playlist, "cannot create playlist fetcher" );
  62
  63     /* Preparse */
  64     p_sys->p_preparser = playlist_preparser_New( p_playlist, p_sys->p_fetcher );
  65     if( !p_sys->p_preparser )
  66         msg_Err( p_playlist, "cannot create playlist preparser" );
  67
  68     /* Start the playlist thread */
  69     if( vlc_thread_create( p_playlist, "playlist", RunControlThread,
  70                            VLC_THREAD_PRIORITY_LOW, false ) )
  71     {
  72         msg_Err( p_playlist, "cannot spawn playlist thread" );
  73     }
  74     msg_Err( p_playlist, "Activated" );
  75 }
  76
  77 void playlist_Deactivate( playlist_t *p_playlist )
  78 {
  79     /* */
  80     playlist_private_t *p_sys = pl_priv(p_playlist);
  81
  82     msg_Err( p_playlist, "Deactivate" );
  83     vlc_object_kill( p_playlist );
  84     vlc_thread_join( p_playlist );
  85
  86     if( p_sys->p_preparser )
  87         playlist_preparser_Delete( p_sys->p_preparser );
  88     if( p_sys->p_fetcher )
  89         playlist_fetcher_Delete( p_sys->p_fetcher );
  90
  91     /* close the remaining sout-keep */
  92     if( p_sys->p_sout )
  93         sout_DeleteInstance( p_sys->p_sout );
  94
  95     /* */
  96     playlist_MLDump( p_playlist );
  97
  98     PL_LOCK;
  99
 100     /* Release the current node */
 101     set_current_status_node( p_playlist, NULL );
 102
 103     /* Release the current item */
 104     set_current_status_item( p_playlist, NULL );
 105
 106     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 107         free( p_del->pp_children );
 108         vlc_gc_decref( p_del->p_input );
 109         free( p_del );
 110     FOREACH_END();
 111     ARRAY_RESET( p_playlist->all_items );
 112     FOREACH_ARRAY( playlist_item_t *p_del, pl_priv(p_playlist)->items_to_delete )
 113         free( p_del->pp_children );
 114         vlc_gc_decref( p_del->p_input );
 115         free( p_del );
 116     FOREACH_END();
 117     ARRAY_RESET( pl_priv(p_playlist)->items_to_delete );
 118
 119     ARRAY_RESET( p_playlist->items );
 120     ARRAY_RESET( p_playlist->current );
 121
 122     PL_UNLOCK;
 123
 124     /* The NULL are there only to assert in playlist destructor */
 125     p_sys->p_sout = NULL;
 126     p_sys->p_preparser = NULL;
 127     p_sys->p_fetcher = NULL;
 128     msg_Err( p_playlist, "Deactivated" );
 129 }
 130
 131 /**
 132  * Run the main control thread itself
 133  */
 134 static void* RunControlThread ( vlc_object_t *p_this )
 135 {
 136     playlist_t *p_playlist = (playlist_t*)p_this;
 137
 138     int canc = vlc_savecancel ();
 139     vlc_object_lock( p_playlist );
 140     while( vlc_object_alive( p_playlist ) )
 141     {
 142         playlist_MainLoop( p_playlist );
 143
 144         /* The playlist lock has been unlocked, so we can't tell if
 145          * someone has killed us in the meantime. Check now. */
 146         if( !vlc_object_alive( p_playlist ) )
 147             break;
 148
 149         if( pl_priv(p_playlist)->b_cant_sleep )
 150         {
 151             /* 100 ms is an acceptable delay for playlist operations */
 152             vlc_object_unlock( p_playlist );
 153
 154             msleep( INTF_IDLE_SLEEP*2 );
 155
 156             vlc_object_lock( p_playlist );
 157         }
 158         else
 159         {
 160             vlc_object_wait( p_playlist );
 161         }
 162     }
 163     vlc_object_unlock( p_playlist );
 164
 165     playlist_LastLoop( p_playlist );
 166     vlc_restorecancel (canc);
 167     return NULL;
 168 }