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 "playlist_internal.h"
  34
  35 /*****************************************************************************
  36  * Local prototypes
  37  *****************************************************************************/
  38 static void* RunControlThread   ( vlc_object_t * );
  39
  40 /*****************************************************************************
  41  * Main functions for the global thread
  42  *****************************************************************************/
  43
  44 /**
  45  * Create the main playlist threads.
  46  * Additionally to the playlist, this thread controls :
  47  *    - Statistics
  48  *    - VLM
  49  * \param p_parent
  50  * \return an object with a started thread
  51  */
  52 void playlist_Activate( playlist_t *p_playlist )
  53 {
  54     /* */
  55     playlist_private_t *p_sys = pl_priv(p_playlist);
  56
  57     /* Fetcher */
  58     p_sys->p_fetcher = playlist_fetcher_New( p_playlist );
  59     if( !p_sys->p_fetcher )
  60         msg_Err( p_playlist, "cannot create playlist fetcher" );
  61
  62     /* Preparse */
  63     p_sys->p_preparser = playlist_preparser_New( p_playlist, p_sys->p_fetcher );
  64     if( !p_sys->p_preparser )
  65         msg_Err( p_playlist, "cannot create playlist preparser" );
  66
  67     /* Start the playlist thread */
  68     if( vlc_thread_create( p_playlist, "playlist", RunControlThread,
  69                            VLC_THREAD_PRIORITY_LOW, false ) )
  70     {
  71         msg_Err( p_playlist, "cannot spawn playlist thread" );
  72     }
  73     msg_Err( p_playlist, "Activated" );
  74 }
  75
  76 void playlist_Deactivate( playlist_t *p_playlist )
  77 {
  78     /* */
  79     playlist_private_t *p_sys = pl_priv(p_playlist);
  80
  81     msg_Err( p_playlist, "Deactivate" );
  82     vlc_object_kill( p_playlist );
  83     vlc_thread_join( p_playlist );
  84
  85     if( p_sys->p_preparser )
  86         playlist_preparser_Delete( p_sys->p_preparser );
  87     if( p_sys->p_fetcher )
  88         playlist_fetcher_Delete( p_sys->p_fetcher );
  89
  90     /* The NULL are there only to assert in playlist destructor */
  91     p_sys->p_preparser = NULL;
  92     p_sys->p_fetcher = NULL;
  93     msg_Err( p_playlist, "Deactivated" );
  94 }
  95
  96 /**
  97  * Run the main control thread itself
  98  */
  99 static void* RunControlThread ( vlc_object_t *p_this )
 100 {
 101     playlist_t *p_playlist = (playlist_t*)p_this;
 102
 103     int canc = vlc_savecancel ();
 104     vlc_object_lock( p_playlist );
 105     while( vlc_object_alive( p_playlist ) )
 106     {
 107         playlist_MainLoop( p_playlist );
 108
 109         /* The playlist lock has been unlocked, so we can't tell if
 110          * someone has killed us in the meantime. Check now. */
 111         if( !vlc_object_alive( p_playlist ) )
 112             break;
 113
 114         if( pl_priv(p_playlist)->b_cant_sleep )
 115         {
 116             /* 100 ms is an acceptable delay for playlist operations */
 117             vlc_object_unlock( p_playlist );
 118
 119             msleep( INTF_IDLE_SLEEP*2 );
 120
 121             vlc_object_lock( p_playlist );
 122         }
 123         else
 124         {
 125             vlc_object_wait( p_playlist );
 126         }
 127     }
 128     vlc_object_unlock( p_playlist );
 129
 130     playlist_LastLoop( p_playlist );
 131     vlc_restorecancel (canc);
 132     return NULL;
 133 }