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 thread
  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_ThreadCreate( vlc_object_t *p_parent )
  53 {
  54     playlist_t *p_playlist = playlist_Create( p_parent );
  55     if( !p_playlist )
  56         return;
  57
  58     /* */
  59     playlist_private_t *p_sys = pl_priv(p_playlist);
  60
  61     /* Fetcher */
  62     p_sys->p_fetcher = playlist_fetcher_New( p_playlist );
  63     if( !p_sys->p_fetcher )
  64         msg_Err( p_playlist, "cannot create playlist fetcher" );
  65
  66     /* Preparse */
  67     p_sys->p_preparser = playlist_preparser_New( p_playlist, p_sys->p_fetcher );
  68     if( !p_sys->p_preparser )
  69         msg_Err( p_playlist, "cannot create playlist preparser" );
  70
  71     /* Start the playlist thread */
  72     if( vlc_thread_create( p_playlist, "playlist", RunControlThread,
  73                            VLC_THREAD_PRIORITY_LOW, false ) )
  74     {
  75         msg_Err( p_playlist, "cannot spawn playlist thread" );
  76         vlc_object_release( p_playlist );
  77         return;
  78     }
  79
  80     /* The object has been initialized, now attach it */
  81     vlc_object_attach( p_playlist, p_parent );
  82 }
  83
  84 /**
  85  * Run the main control thread itself
  86  */
  87 static void* RunControlThread ( vlc_object_t *p_this )
  88 {
  89     playlist_t *p_playlist = (playlist_t*)p_this;
  90
  91     int canc = vlc_savecancel ();
  92     vlc_object_lock( p_playlist );
  93     while( vlc_object_alive( p_playlist ) )
  94     {
  95         playlist_MainLoop( p_playlist );
  96
  97         /* The playlist lock has been unlocked, so we can't tell if
  98          * someone has killed us in the meantime. Check now. */
  99         if( !vlc_object_alive( p_playlist ) )
 100             break;
 101
 102         if( pl_priv(p_playlist)->b_cant_sleep )
 103         {
 104             /* 100 ms is an acceptable delay for playlist operations */
 105             vlc_object_unlock( p_playlist );
 106
 107             msleep( INTF_IDLE_SLEEP*2 );
 108
 109             vlc_object_lock( p_playlist );
 110         }
 111         else
 112         {
 113             vlc_object_wait( p_playlist );
 114         }
 115     }
 116     vlc_object_unlock( p_playlist );
 117
 118     playlist_LastLoop( p_playlist );
 119     vlc_restorecancel (canc);
 120     return NULL;
 121 }