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_playlist.h"
  28 #include "vlc_interaction.h"
  29 #include "playlist_internal.h"
  30
  31 /*****************************************************************************
  32  * Local prototypes
  33  *****************************************************************************/
  34 static void RunControlThread ( playlist_t * );
  35 static void RunPreparse( playlist_preparse_t * );
  36 static void RunSecondaryPreparse( playlist_secondary_preparse_t * );
  37
  38 static playlist_t * CreatePlaylist( vlc_object_t *p_parent );
  39 static void EndPlaylist( playlist_t * );
  40 static void DestroyPlaylist( playlist_t * );
  41
  42 static void DestroyInteraction( playlist_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  *    - Interaction
  52  *    - Statistics
  53  *    - VLM
  54  * \param p_parent
  55  * \return an object with a started thread
  56  */
  57 void __playlist_ThreadCreate( vlc_object_t *p_parent )
  58 {
  59     playlist_t *p_playlist;
  60     p_playlist = CreatePlaylist( p_parent );
  61
  62     if( !p_playlist ) return;
  63
  64     // Stats
  65     p_playlist->p_stats = (global_stats_t *)malloc( sizeof( global_stats_t ) );
  66     vlc_mutex_init( p_playlist, &p_playlist->p_stats->lock );
  67     p_playlist->p_stats_computer = NULL;
  68
  69     // Interaction
  70     p_playlist->p_interaction = NULL;
  71
  72     // Preparse
  73     p_playlist->p_preparse = vlc_object_create( p_playlist,
  74                                   sizeof( playlist_preparse_t ) );
  75     if( !p_playlist->p_preparse )
  76     {
  77         msg_Err( p_playlist, "unable to create preparser" );
  78         vlc_object_destroy( 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_attach( p_playlist->p_preparse, p_playlist );
  85     if( vlc_thread_create( p_playlist->p_preparse, "preparser",
  86                            RunPreparse, VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
  87     {
  88         msg_Err( p_playlist, "cannot spawn preparse thread" );
  89         vlc_object_detach( p_playlist->p_preparse );
  90         vlc_object_destroy( p_playlist->p_preparse );
  91         return;
  92     }
  93
  94     // Secondary Preparse
  95     p_playlist->p_secondary_preparse = vlc_object_create( p_playlist,
  96                               sizeof( playlist_secondary_preparse_t ) );
  97     if( !p_playlist->p_secondary_preparse )
  98     {
  99         msg_Err( p_playlist, "unable to create secondary preparser" );
 100         vlc_object_destroy( p_playlist );
 101         return;
 102     }
 103     p_playlist->p_secondary_preparse->i_waiting = 0;
 104     p_playlist->p_secondary_preparse->p_waiting = NULL;
 105
 106     vlc_object_attach( p_playlist->p_secondary_preparse, p_playlist );
 107     if( vlc_thread_create( p_playlist->p_secondary_preparse,
 108                            "secondary preparser",
 109                            RunSecondaryPreparse,
 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_secondary_preparse );
 114         vlc_object_destroy( p_playlist->p_secondary_preparse );
 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_destroy( 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     p_playlist->b_die = VLC_TRUE;
 143     playlist_Signal( p_playlist );
 144     if( p_playlist->p_preparse )
 145     {
 146         vlc_cond_signal( &p_playlist->p_preparse->object_wait );
 147         free( p_playlist->p_preparse->pp_waiting );
 148     }
 149     if( p_playlist->p_secondary_preparse )
 150     {
 151         vlc_cond_signal( &p_playlist->p_secondary_preparse->object_wait );
 152         free( p_playlist->p_secondary_preparse->p_waiting );
 153     }
 154
 155     DestroyInteraction( p_playlist );
 156     DestroyPlaylist( p_playlist );
 157
 158     return VLC_SUCCESS;
 159 }
 160
 161 /**
 162  * Run the main control thread itself
 163  */
 164 static void RunControlThread ( playlist_t *p_playlist )
 165 {
 166    int i_loops = 0;
 167
 168    /* Tell above that we're ready */
 169    vlc_thread_ready( p_playlist );
 170
 171     while( !p_playlist->b_die )
 172     {
 173         i_loops++;
 174
 175         if( p_playlist->p_interaction )
 176             intf_InteractionManage( p_playlist );
 177
 178         playlist_MainLoop( p_playlist );
 179         if( p_playlist->b_cant_sleep )
 180         {
 181             /* 100 ms is an acceptable delay for playlist operations */
 182             msleep( INTF_IDLE_SLEEP*2 );
 183         }
 184         else
 185         {
 186             PL_LOCK;
 187             vlc_cond_wait( &p_playlist->object_wait, &p_playlist->object_lock );
 188             PL_UNLOCK;
 189         }
 190     }
 191
 192     EndPlaylist( p_playlist );
 193 }
 194
 195
 196 /*****************************************************************************
 197  * Playlist-specific functions
 198  *****************************************************************************/
 199 static playlist_t * CreatePlaylist( vlc_object_t *p_parent )
 200 {
 201     return playlist_Create( p_parent );
 202 }
 203
 204 static void DestroyPlaylist( playlist_t *p_playlist )
 205 {
 206     playlist_Destroy( p_playlist );
 207 }
 208
 209 static void EndPlaylist( playlist_t *p_playlist )
 210 {
 211     playlist_LastLoop( p_playlist );
 212 }
 213
 214 /*****************************************************************************
 215  * Preparse-specific functions
 216  *****************************************************************************/
 217 static void RunPreparse ( playlist_preparse_t *p_obj )
 218 {
 219     /* Tell above that we're ready */
 220     vlc_thread_ready( p_obj );
 221     playlist_PreparseLoop( p_obj );
 222 }
 223
 224 static void RunSecondaryPreparse( playlist_secondary_preparse_t *p_obj )
 225 {
 226     /* Tell above that we're ready */
 227     vlc_thread_ready( p_obj );
 228     playlist_SecondaryPreparseLoop( p_obj );
 229 }
 230
 231 /*****************************************************************************
 232  * Interaction functions
 233  *****************************************************************************/
 234 static void DestroyInteraction( playlist_t *p_playlist )
 235 {
 236     if( p_playlist->p_interaction )
 237     {
 238         intf_InteractionDestroy( p_playlist->p_interaction );
 239         fprintf( stderr, "NOW NULL ****\n" );
 240         p_playlist->p_interaction = NULL;
 241     }
 242 }