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 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <vlc/vlc.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 #include "interface/interface.h"
  35
  36 /*****************************************************************************
  37  * Local prototypes
  38  *****************************************************************************/
  39 static void RunControlThread ( playlist_t * );
  40 static void RunPreparse( playlist_preparse_t * );
  41 static void RunFetcher( playlist_fetcher_t * );
  42
  43 static void DestroyInteraction( playlist_t * );
  44
  45 /*****************************************************************************
  46  * Main functions for the global thread
  47  *****************************************************************************/
  48
  49 /**
  50  * Create the main playlist thread
  51  * Additionally to the playlist, this thread controls :
  52  *    - Interaction
  53  *    - Statistics
  54  *    - VLM
  55  * \param p_parent
  56  * \return an object with a started thread
  57  */
  58 void __playlist_ThreadCreate( vlc_object_t *p_parent )
  59 {
  60     playlist_t *p_playlist = playlist_Create( p_parent );
  61     if( !p_playlist ) return;
  62
  63     // Stats
  64     p_playlist->p_stats = (global_stats_t *)malloc( sizeof( global_stats_t ) );
  65     if( !p_playlist->p_stats )
  66     {
  67         vlc_object_release( p_playlist );
  68         return;
  69     }
  70     vlc_mutex_init( p_playlist, &p_playlist->p_stats->lock );
  71     p_playlist->p_stats_computer = NULL;
  72
  73     // Preparse
  74     p_playlist->p_preparse = vlc_object_create( p_playlist,
  75                                   sizeof( playlist_preparse_t ) );
  76     if( !p_playlist->p_preparse )
  77     {
  78         msg_Err( p_playlist, "unable to create preparser" );
  79         vlc_object_release( p_playlist );
  80         return;
  81     }
  82     p_playlist->p_preparse->i_waiting = 0;
  83     p_playlist->p_preparse->pp_waiting = NULL;
  84
  85     vlc_object_attach( p_playlist->p_preparse, p_playlist );
  86     if( vlc_thread_create( p_playlist->p_preparse, "preparser",
  87                            RunPreparse, VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
  88     {
  89         msg_Err( p_playlist, "cannot spawn preparse thread" );
  90         vlc_object_detach( p_playlist->p_preparse );
  91         vlc_object_release( p_playlist->p_preparse );
  92         return;
  93     }
  94
  95     // Secondary Preparse
  96     p_playlist->p_fetcher = vlc_object_create( p_playlist,
  97                               sizeof( playlist_fetcher_t ) );
  98     if( !p_playlist->p_fetcher )
  99     {
 100         msg_Err( p_playlist, "unable to create secondary preparser" );
 101         vlc_object_release( p_playlist );
 102         return;
 103     }
 104     p_playlist->p_fetcher->i_waiting = 0;
 105     p_playlist->p_fetcher->p_waiting = NULL;
 106     p_playlist->p_fetcher->b_fetch_meta = var_CreateGetInteger( p_playlist,
 107                                                                  "fetch-meta" );
 108     p_playlist->p_fetcher->i_art_policy = var_CreateGetInteger( p_playlist,
 109                                                                 "album-art" );
 110
 111     vlc_object_attach( p_playlist->p_fetcher, p_playlist );
 112     if( vlc_thread_create( p_playlist->p_fetcher,
 113                            "fetcher",
 114                            RunFetcher,
 115                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 116     {
 117         msg_Err( p_playlist, "cannot spawn secondary preparse thread" );
 118         vlc_object_detach( p_playlist->p_fetcher );
 119         vlc_object_release( p_playlist->p_fetcher );
 120         return;
 121     }
 122
 123     // Start the thread
 124     if( vlc_thread_create( p_playlist, "playlist", RunControlThread,
 125                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 126     {
 127         msg_Err( p_playlist, "cannot spawn playlist thread" );
 128         vlc_object_release( p_playlist );
 129         return;
 130     }
 131
 132     /* The object has been initialized, now attach it */
 133     vlc_object_attach( p_playlist, p_parent );
 134
 135     return;
 136 }
 137
 138 /**
 139  * Destroy the playlist global thread.
 140  *
 141  * Deinits all things controlled by the playlist global thread
 142  * \param p_playlist the playlist thread to destroy
 143  * \return VLC_SUCCESS or an error
 144  */
 145 int playlist_ThreadDestroy( playlist_t * p_playlist )
 146 {
 147     // Tell playlist to go to last loop
 148     vlc_object_kill( p_playlist );
 149
 150     // Kill preparser
 151     if( p_playlist->p_preparse )
 152     {
 153         vlc_object_kill( p_playlist->p_preparse );
 154         vlc_thread_join( p_playlist->p_preparse );
 155         free( p_playlist->p_preparse->pp_waiting );
 156         vlc_object_detach( p_playlist->p_preparse );
 157         vlc_object_release( p_playlist->p_preparse );
 158     }
 159
 160     // Kill meta fetcher
 161     if( p_playlist->p_fetcher )
 162     {
 163         vlc_object_kill( p_playlist->p_fetcher );
 164         vlc_thread_join( p_playlist->p_fetcher );
 165         free( p_playlist->p_fetcher->p_waiting );
 166         vlc_object_detach( p_playlist->p_fetcher );
 167         vlc_object_release( p_playlist->p_fetcher );
 168     }
 169
 170     // Wait for thread to complete
 171     vlc_thread_join( p_playlist );
 172
 173     // Stats
 174     vlc_mutex_destroy( &p_playlist->p_stats->lock );
 175     if( p_playlist->p_stats )
 176         free( p_playlist->p_stats );
 177
 178     DestroyInteraction( p_playlist );
 179
 180     playlist_Destroy( p_playlist );
 181
 182     return VLC_SUCCESS;
 183 }
 184
 185 /**
 186  * Run the main control thread itself
 187  */
 188 static void RunControlThread ( playlist_t *p_playlist )
 189 {
 190     int i_loops = 0;
 191
 192     /* Tell above that we're ready */
 193     vlc_thread_ready( p_playlist );
 194     while( !p_playlist->b_die )
 195     {
 196         i_loops++;
 197
 198         if( p_playlist->p_interaction )
 199             intf_InteractionManage( p_playlist );
 200
 201         playlist_MainLoop( p_playlist );
 202         if( p_playlist->b_cant_sleep )
 203         {
 204             /* 100 ms is an acceptable delay for playlist operations */
 205             msleep( INTF_IDLE_SLEEP*2 );
 206         }
 207         else
 208         {
 209             PL_LOCK;
 210             vlc_cond_wait( &p_playlist->object_wait, &p_playlist->object_lock );
 211             PL_UNLOCK;
 212         }
 213     }
 214     playlist_LastLoop( p_playlist );
 215 }
 216
 217 /*****************************************************************************
 218  * Preparse-specific functions
 219  *****************************************************************************/
 220 static void RunPreparse ( playlist_preparse_t *p_obj )
 221 {
 222     /* Tell above that we're ready */
 223     vlc_thread_ready( p_obj );
 224     playlist_PreparseLoop( p_obj );
 225 }
 226
 227 static void RunFetcher( playlist_fetcher_t *p_obj )
 228 {
 229     /* Tell above that we're ready */
 230     vlc_thread_ready( p_obj );
 231     playlist_FetcherLoop( p_obj );
 232 }
 233
 234 /*****************************************************************************
 235  * Interaction functions
 236  *****************************************************************************/
 237 static void DestroyInteraction( playlist_t *p_playlist )
 238 {
 239     if( p_playlist->p_interaction )
 240     {
 241         intf_InteractionDestroy( p_playlist->p_interaction );
 242         p_playlist->p_interaction = NULL;
 243     }
 244 }