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