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 HandlePlaylist( playlist_t * );
  40 static void EndPlaylist( playlist_t * );
  41 static void DestroyPlaylist( playlist_t * );
  42
  43 static void HandleInteraction( playlist_t * );
  44 static void DestroyInteraction( playlist_t * );
  45
  46 /*****************************************************************************
  47  * Main functions for the global thread
  48  *****************************************************************************/
  49
  50 /**
  51  * Create the main playlist thread
  52  * Additionally to the playlist, this thread controls :
  53  *    - Interaction
  54  *    - Statistics
  55  *    - VLM
  56  * \param p_parent
  57  * \return an object with a started thread
  58  */
  59 void __playlist_ThreadCreate( vlc_object_t *p_parent )
  60 {
  61     playlist_t *p_playlist;
  62     p_playlist = CreatePlaylist( p_parent );
  63
  64     if( !p_playlist ) return;
  65
  66     // Stats
  67     p_playlist->p_stats = (global_stats_t *)malloc( sizeof( global_stats_t ) );
  68     vlc_mutex_init( p_playlist, &p_playlist->p_stats->lock );
  69     p_playlist->p_stats_computer = NULL;
  70
  71     // Interaction
  72     p_playlist->p_interaction = NULL;
  73
  74     // Preparse
  75     p_playlist->p_preparse = vlc_object_create( p_playlist,
  76                                   sizeof( playlist_preparse_t ) );
  77     if( !p_playlist->p_preparse )
  78     {
  79         msg_Err( p_playlist, "unable to create preparser" );
  80         vlc_object_destroy( p_playlist );
  81         return;
  82     }
  83     p_playlist->p_preparse->i_waiting = 0;
  84     p_playlist->p_preparse->pp_waiting = NULL;
  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_detach( p_playlist->p_preparse );
  92         vlc_object_destroy( p_playlist->p_preparse );
  93         return;
  94     }
  95
  96     // Secondary Preparse
  97     p_playlist->p_secondary_preparse = vlc_object_create( p_playlist,
  98                               sizeof( playlist_secondary_preparse_t ) );
  99     if( !p_playlist->p_secondary_preparse )
 100     {
 101         msg_Err( p_playlist, "unable to create secondary preparser" );
 102         vlc_object_destroy( p_playlist );
 103         return;
 104     }
 105     p_playlist->p_secondary_preparse->i_waiting = 0;
 106     p_playlist->p_secondary_preparse->p_waiting = NULL;
 107
 108     vlc_object_attach( p_playlist->p_secondary_preparse, p_playlist );
 109     if( vlc_thread_create( p_playlist->p_secondary_preparse,
 110                            "secondary preparser",
 111                            RunSecondaryPreparse,
 112                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 113     {
 114         msg_Err( p_playlist, "cannot spawn secondary preparse thread" );
 115         vlc_object_detach( p_playlist->p_secondary_preparse );
 116         vlc_object_destroy( p_playlist->p_secondary_preparse );
 117         return;
 118     }
 119
 120     // Start the thread
 121     if( vlc_thread_create( p_playlist, "playlist", RunControlThread,
 122                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 123     {
 124         msg_Err( p_playlist, "cannot spawn playlist thread" );
 125         vlc_object_destroy( p_playlist );
 126         return;
 127     }
 128
 129     /* The object has been initialized, now attach it */
 130     vlc_object_attach( p_playlist, p_parent );
 131
 132     return;
 133 }
 134
 135 /**
 136  * Destroy the playlist global thread.
 137  *
 138  * Deinits all things controlled by the playlist global thread
 139  * \param p_playlist the playlist thread to destroy
 140  * \return VLC_SUCCESS or an error
 141  */
 142 int playlist_ThreadDestroy( playlist_t * p_playlist )
 143 {
 144     p_playlist->b_die = VLC_TRUE;
 145     playlist_Signal( p_playlist );
 146     if( p_playlist->p_preparse )
 147     {
 148         vlc_cond_signal( &p_playlist->p_preparse->object_wait );
 149         free( p_playlist->p_preparse->pp_waiting );
 150     }
 151     if( p_playlist->p_secondary_preparse )
 152     {
 153         vlc_cond_signal( &p_playlist->p_secondary_preparse->object_wait );
 154         free( p_playlist->p_secondary_preparse->p_waiting );
 155     }
 156
 157     DestroyInteraction( p_playlist );
 158     DestroyPlaylist( p_playlist );
 159
 160     return VLC_SUCCESS;
 161 }
 162
 163 /**
 164  * Run the main control thread itself
 165  */
 166 static void RunControlThread ( playlist_t *p_playlist )
 167 {
 168    int i_loops = 0;
 169
 170    /* Tell above that we're ready */
 171    vlc_thread_ready( p_playlist );
 172
 173     while( !p_playlist->b_die )
 174     {
 175         i_loops++;
 176
 177         HandleInteraction( p_playlist );
 178         HandlePlaylist( 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 HandlePlaylist( playlist_t *p_playlist )
 210 {
 211     playlist_MainLoop( p_playlist );
 212 }
 213
 214 static void EndPlaylist( playlist_t *p_playlist )
 215 {
 216     playlist_LastLoop( p_playlist );
 217 }
 218
 219 /*****************************************************************************
 220  * Preparse-specific functions
 221  *****************************************************************************/
 222 static void RunPreparse ( playlist_preparse_t *p_obj )
 223 {
 224     /* Tell above that we're ready */
 225     vlc_thread_ready( p_obj );
 226     playlist_PreparseLoop( p_obj );
 227 }
 228
 229 static void RunSecondaryPreparse( playlist_secondary_preparse_t *p_obj )
 230 {
 231     /* Tell above that we're ready */
 232     vlc_thread_ready( p_obj );
 233     playlist_SecondaryPreparseLoop( p_obj );
 234 }
 235
 236 /*****************************************************************************
 237  * Interaction functions
 238  *****************************************************************************/
 239 static void DestroyInteraction( playlist_t *p_playlist )
 240 {
 241     if( p_playlist->p_interaction )
 242     {
 243         intf_InteractionDestroy( p_playlist->p_interaction );
 244         fprintf( stderr, "NOW NULL ****\n" );
 245         p_playlist->p_interaction = NULL;
 246     }
 247 }
 248
 249 static void HandleInteraction( playlist_t *p_playlist )
 250 {
 251     if( p_playlist->p_interaction )
 252     {
 253         stats_TimerStart( p_playlist, "Interaction thread",
 254                           STATS_TIMER_INTERACTION );
 255         intf_InteractionManage( p_playlist );
 256         stats_TimerStop( p_playlist, STATS_TIMER_INTERACTION );
 257     }
 258 }