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     if( p_playlist->p_preparse )
 146     {
 147         vlc_cond_signal( &p_playlist->p_preparse->object_wait );
 148         free( p_playlist->p_preparse->pp_waiting );
 149     }
 150     if( p_playlist->p_secondary_preparse )
 151     {
 152         vlc_cond_signal( &p_playlist->p_secondary_preparse->object_wait );
 153         free( p_playlist->p_secondary_preparse->p_waiting );
 154     }
 155
 156     DestroyInteraction( p_playlist );
 157     DestroyPlaylist( p_playlist );
 158
 159     return VLC_SUCCESS;
 160 }
 161
 162 /**
 163  * Run the main control thread itself
 164  */
 165 static void RunControlThread ( playlist_t *p_playlist )
 166 {
 167    int i_loops = 0;
 168
 169    /* Tell above that we're ready */
 170    vlc_thread_ready( p_playlist );
 171
 172     while( !p_playlist->b_die )
 173     {
 174         i_loops++;
 175
 176         HandleInteraction( p_playlist );
 177         HandlePlaylist( p_playlist );
 178
 179         /* 100 ms is an acceptable delay for playlist operations */
 180         msleep( INTF_IDLE_SLEEP*2 );
 181     }
 182
 183     EndPlaylist( p_playlist );
 184 }
 185
 186
 187 /*****************************************************************************
 188  * Playlist-specific functions
 189  *****************************************************************************/
 190 static playlist_t * CreatePlaylist( vlc_object_t *p_parent )
 191 {
 192     return playlist_Create( p_parent );
 193 }
 194
 195 static void DestroyPlaylist( playlist_t *p_playlist )
 196 {
 197     playlist_Destroy( p_playlist );
 198 }
 199
 200 static void HandlePlaylist( playlist_t *p_playlist )
 201 {
 202     playlist_MainLoop( p_playlist );
 203 }
 204
 205 static void EndPlaylist( playlist_t *p_playlist )
 206 {
 207     playlist_LastLoop( p_playlist );
 208 }
 209
 210 /*****************************************************************************
 211  * Preparse-specific functions
 212  *****************************************************************************/
 213 static void RunPreparse ( playlist_preparse_t *p_obj )
 214 {
 215     /* Tell above that we're ready */
 216     vlc_thread_ready( p_obj );
 217     playlist_PreparseLoop( p_obj );
 218 }
 219
 220 static void RunSecondaryPreparse( playlist_secondary_preparse_t *p_obj )
 221 {
 222     /* Tell above that we're ready */
 223     vlc_thread_ready( p_obj );
 224     playlist_SecondaryPreparseLoop( p_obj );
 225 }
 226
 227 /*****************************************************************************
 228  * Interaction functions
 229  *****************************************************************************/
 230 static void DestroyInteraction( playlist_t *p_playlist )
 231 {
 232     if( p_playlist->p_interaction )
 233     {
 234         intf_InteractionDestroy( p_playlist->p_interaction );
 235         fprintf( stderr, "NOW NULL ****\n" );
 236         p_playlist->p_interaction = NULL;
 237     }
 238 }
 239
 240 static void HandleInteraction( playlist_t *p_playlist )
 241 {
 242     if( p_playlist->p_interaction )
 243     {
 244         stats_TimerStart( p_playlist, "Interaction thread",
 245                           STATS_TIMER_INTERACTION );
 246         intf_InteractionManage( p_playlist );
 247         stats_TimerStop( p_playlist, STATS_TIMER_INTERACTION );
 248     }
 249 }