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->b_fetch_meta = var_CreateGetInteger( p_playlist,
 101                                                                  "meta-fetch" );
 102     p_playlist->p_fetcher->i_art_policy = var_CreateGetInteger( p_playlist,
 103                                                                 "album-art" );
 104
 105     vlc_object_attach( p_playlist->p_fetcher, p_playlist );
 106     if( vlc_thread_create( p_playlist->p_fetcher,
 107                            "fetcher",
 108                            RunFetcher,
 109                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 110     {
 111         msg_Err( p_playlist, "cannot spawn secondary preparse thread" );
 112         vlc_object_detach( p_playlist->p_fetcher );
 113         vlc_object_destroy( p_playlist->p_fetcher );
 114         return;
 115     }
 116
 117     // Start the thread
 118     if( vlc_thread_create( p_playlist, "playlist", RunControlThread,
 119                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 120     {
 121         msg_Err( p_playlist, "cannot spawn playlist thread" );
 122         vlc_object_destroy( p_playlist );
 123         return;
 124     }
 125
 126     /* The object has been initialized, now attach it */
 127     vlc_object_attach( p_playlist, p_parent );
 128
 129     return;
 130 }
 131
 132 /**
 133  * Destroy the playlist global thread.
 134  *
 135  * Deinits all things controlled by the playlist global thread
 136  * \param p_playlist the playlist thread to destroy
 137  * \return VLC_SUCCESS or an error
 138  */
 139 int playlist_ThreadDestroy( playlist_t * p_playlist )
 140 {
 141     // Tell playlist to go to last loop
 142     vlc_object_kill( p_playlist );
 143
 144     // Kill preparser
 145     if( p_playlist->p_preparse )
 146     {
 147         vlc_object_kill( p_playlist->p_preparse );
 148         vlc_thread_join( p_playlist->p_preparse );
 149         free( p_playlist->p_preparse->pp_waiting );
 150         vlc_object_detach( p_playlist->p_preparse );
 151         vlc_object_destroy( p_playlist->p_preparse );
 152     }
 153
 154     // Kill meta fetcher
 155     if( p_playlist->p_fetcher )
 156     {
 157         vlc_object_kill( p_playlist->p_fetcher );
 158         vlc_thread_join( p_playlist->p_fetcher );
 159         free( p_playlist->p_fetcher->p_waiting );
 160         vlc_object_detach( p_playlist->p_fetcher );
 161         vlc_object_destroy( p_playlist->p_fetcher );
 162     }
 163
 164     // Wait for thread to complete
 165     vlc_thread_join( p_playlist );
 166
 167     // Stats
 168     vlc_mutex_destroy( &p_playlist->p_stats->lock );
 169     if( p_playlist->p_stats )
 170         free( p_playlist->p_stats );
 171
 172     DestroyInteraction( p_playlist );
 173
 174     playlist_Destroy( p_playlist );
 175
 176     return VLC_SUCCESS;
 177 }
 178
 179 /**
 180  * Run the main control thread itself
 181  */
 182 static void RunControlThread ( playlist_t *p_playlist )
 183 {
 184     int i_loops = 0;
 185
 186     /* Tell above that we're ready */
 187     vlc_thread_ready( p_playlist );
 188     while( !p_playlist->b_die )
 189     {
 190         i_loops++;
 191
 192         if( p_playlist->p_interaction )
 193             intf_InteractionManage( p_playlist );
 194
 195         playlist_MainLoop( p_playlist );
 196         if( p_playlist->b_cant_sleep )
 197         {
 198             /* 100 ms is an acceptable delay for playlist operations */
 199             msleep( INTF_IDLE_SLEEP*2 );
 200         }
 201         else
 202         {
 203             PL_LOCK;
 204             vlc_cond_wait( &p_playlist->object_wait, &p_playlist->object_lock );
 205             PL_UNLOCK;
 206         }
 207     }
 208     playlist_LastLoop( p_playlist );
 209 }
 210
 211 /*****************************************************************************
 212  * Preparse-specific functions
 213  *****************************************************************************/
 214 static void RunPreparse ( playlist_preparse_t *p_obj )
 215 {
 216     /* Tell above that we're ready */
 217     vlc_thread_ready( p_obj );
 218     playlist_PreparseLoop( p_obj );
 219 }
 220
 221 static void RunFetcher( playlist_fetcher_t *p_obj )
 222 {
 223     /* Tell above that we're ready */
 224     vlc_thread_ready( p_obj );
 225     playlist_FetcherLoop( p_obj );
 226 }
 227
 228 /*****************************************************************************
 229  * Interaction functions
 230  *****************************************************************************/
 231 static void DestroyInteraction( playlist_t *p_playlist )
 232 {
 233     if( p_playlist->p_interaction )
 234     {
 235         intf_InteractionDestroy( p_playlist->p_interaction );
 236         p_playlist->p_interaction = NULL;
 237     }
 238 }