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

   1 /*****************************************************************************
   2  * playlist.c : Playlist management functions
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 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 #include <vlc/vlc.h>
  25 #include <vlc_es.h>
  26 #include <vlc_input.h>
  27 #include <vlc_interface.h>
  28 #include <vlc_playlist.h>
  29 #include "playlist_internal.h"
  30 #include "interface/interface.h"
  31
  32 /*****************************************************************************
  33  * Local prototypes
  34  *****************************************************************************/
  35 static void RunControlThread ( playlist_t * );
  36 static void RunPreparse( playlist_preparse_t * );
  37 static void RunFetcher( playlist_fetcher_t * );
  38
  39 static void DestroyInteraction( playlist_t * );
  40
  41 /*****************************************************************************
  42  * Main functions for the global thread
  43  *****************************************************************************/
  44
  45 /**
  46  * Create the main playlist thread
  47  * Additionally to the playlist, this thread controls :
  48  *    - Interaction
  49  *    - Statistics
  50  *    - VLM
  51  * \param p_parent
  52  * \return an object with a started thread
  53  */
  54 void __playlist_ThreadCreate( vlc_object_t *p_parent )
  55 {
  56     playlist_t *p_playlist = playlist_Create( p_parent );
  57     if( !p_playlist ) return;
  58
  59     // Stats
  60     p_playlist->p_stats = (global_stats_t *)malloc( sizeof( global_stats_t ) );
  61     vlc_mutex_init( p_playlist, &p_playlist->p_stats->lock );
  62     p_playlist->p_stats_computer = NULL;
  63
  64     // Interaction
  65     p_playlist->p_interaction = NULL;
  66
  67     // Preparse
  68     p_playlist->p_preparse = vlc_object_create( p_playlist,
  69                                   sizeof( playlist_preparse_t ) );
  70     if( !p_playlist->p_preparse )
  71     {
  72         msg_Err( p_playlist, "unable to create preparser" );
  73         vlc_object_destroy( p_playlist );
  74         return;
  75     }
  76     p_playlist->p_preparse->i_waiting = 0;
  77     p_playlist->p_preparse->pp_waiting = NULL;
  78
  79     vlc_object_attach( p_playlist->p_preparse, p_playlist );
  80     if( vlc_thread_create( p_playlist->p_preparse, "preparser",
  81                            RunPreparse, VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
  82     {
  83         msg_Err( p_playlist, "cannot spawn preparse thread" );
  84         vlc_object_detach( p_playlist->p_preparse );
  85         vlc_object_destroy( p_playlist->p_preparse );
  86         return;
  87     }
  88
  89     // Secondary Preparse
  90     p_playlist->p_fetcher = vlc_object_create( p_playlist,
  91                               sizeof( playlist_fetcher_t ) );
  92     if( !p_playlist->p_fetcher )
  93     {
  94         msg_Err( p_playlist, "unable to create secondary preparser" );
  95         vlc_object_destroy( p_playlist );
  96         return;
  97     }
  98     p_playlist->p_fetcher->i_waiting = 0;
  99     p_playlist->p_fetcher->p_waiting = NULL;
 100     p_playlist->p_fetcher->i_art_policy = var_CreateGetInteger( p_playlist,
 101                                                                 "album-art" );
 102
 103     vlc_object_attach( p_playlist->p_fetcher, p_playlist );
 104     if( vlc_thread_create( p_playlist->p_fetcher,
 105                            "fetcher",
 106                            RunFetcher,
 107                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 108     {
 109         msg_Err( p_playlist, "cannot spawn secondary preparse thread" );
 110         vlc_object_detach( p_playlist->p_fetcher );
 111         vlc_object_destroy( p_playlist->p_fetcher );
 112         return;
 113     }
 114
 115     // Start the thread
 116     if( vlc_thread_create( p_playlist, "playlist", RunControlThread,
 117                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 118     {
 119         msg_Err( p_playlist, "cannot spawn playlist thread" );
 120         vlc_object_destroy( p_playlist );
 121         return;
 122     }
 123
 124     /* The object has been initialized, now attach it */
 125     vlc_object_attach( p_playlist, p_parent );
 126
 127     return;
 128 }
 129
 130 /**
 131  * Destroy the playlist global thread.
 132  *
 133  * Deinits all things controlled by the playlist global thread
 134  * \param p_playlist the playlist thread to destroy
 135  * \return VLC_SUCCESS or an error
 136  */
 137 int playlist_ThreadDestroy( playlist_t * p_playlist )
 138 {
 139     // Tell playlist to go to last loop
 140     vlc_object_kill( p_playlist );
 141
 142     // Kill preparser
 143     if( p_playlist->p_preparse )
 144     {
 145         vlc_object_kill( p_playlist->p_preparse );
 146         vlc_thread_join( p_playlist->p_preparse );
 147         free( p_playlist->p_preparse->pp_waiting );
 148         vlc_object_detach( p_playlist->p_preparse );
 149         vlc_object_destroy( p_playlist->p_preparse );
 150     }
 151
 152     // Kill meta fetcher
 153     if( p_playlist->p_fetcher )
 154     {
 155         vlc_object_kill( p_playlist->p_fetcher );
 156         vlc_thread_join( p_playlist->p_fetcher );
 157         free( p_playlist->p_fetcher->p_waiting );
 158         vlc_object_detach( p_playlist->p_fetcher );
 159         vlc_object_destroy( p_playlist->p_fetcher );
 160     }
 161
 162     // Wait for thread to complete
 163     vlc_thread_join( p_playlist );
 164
 165     // Stats
 166     vlc_mutex_destroy( &p_playlist->p_stats->lock );
 167     if( p_playlist->p_stats )
 168         free( p_playlist->p_stats );
 169
 170     DestroyInteraction( p_playlist );
 171
 172     playlist_Destroy( p_playlist );
 173
 174     return VLC_SUCCESS;
 175 }
 176
 177 /**
 178  * Run the main control thread itself
 179  */
 180 static void RunControlThread ( playlist_t *p_playlist )
 181 {
 182     int i_loops = 0;
 183
 184     /* Tell above that we're ready */
 185     vlc_thread_ready( p_playlist );
 186     while( !p_playlist->b_die )
 187     {
 188         i_loops++;
 189
 190         if( p_playlist->p_interaction )
 191             intf_InteractionManage( p_playlist );
 192
 193         playlist_MainLoop( p_playlist );
 194         if( p_playlist->b_cant_sleep )
 195         {
 196             /* 100 ms is an acceptable delay for playlist operations */
 197             msleep( INTF_IDLE_SLEEP*2 );
 198         }
 199         else
 200         {
 201             PL_LOCK;
 202             vlc_cond_wait( &p_playlist->object_wait, &p_playlist->object_lock );
 203             PL_UNLOCK;
 204         }
 205     }
 206     playlist_LastLoop( p_playlist );
 207 }
 208
 209 /*****************************************************************************
 210  * Preparse-specific functions
 211  *****************************************************************************/
 212 static void RunPreparse ( playlist_preparse_t *p_obj )
 213 {
 214     /* Tell above that we're ready */
 215     vlc_thread_ready( p_obj );
 216     playlist_PreparseLoop( p_obj );
 217 }
 218
 219 static void RunFetcher( playlist_fetcher_t *p_obj )
 220 {
 221     /* Tell above that we're ready */
 222     vlc_thread_ready( p_obj );
 223     playlist_FetcherLoop( p_obj );
 224 }
 225
 226 /*****************************************************************************
 227  * Interaction functions
 228  *****************************************************************************/
 229 static void DestroyInteraction( playlist_t *p_playlist )
 230 {
 231     if( p_playlist->p_interaction )
 232     {
 233         intf_InteractionDestroy( p_playlist->p_interaction );
 234         p_playlist->p_interaction = NULL;
 235     }
 236 }