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